There is a obvious distinction between Die-casting and injection mold

Injection mold and Die casting mold is the basic difference is not the same material, one is plastic, one is the alloy, so Die-casting mold to bear much more than the pressure and temperature of the mold, the mold structure needs to strengthen the way feed, Flow channel, cooling design are not the same

1, Die-casting mold injection pressure, so the template is relatively thicker requirements to prevent deformation

2, Die-casting mold gate and injection molds different, need to do spure sperader decomposition of the high-pressure materials

3, Die-casting mold Die does not require quenching, because the Die cavity when the cavity temperature exceeds 700 degrees, so every time the equivalent of a quenching mold cavity will be more and more hard. The general injection mold to be quenched to HRC52 or more.

4. Die-casting mold cavity to the general nitriding treatment to prevent the alloy Die cavity.

5. General Die-casting mold corrosion is relatively large, the outer surface of the general blue treatment.

6. Compared with the injection mold, Die-casting mold with the activities of the part (such as Core pulling slider) with the gap to be larger,Because the high temperature of the Die-casting process will cause thermal expansion.If the gap is too small will cause the mold stuck

7. Die-casting mold with more demanding parting, because the alloy flow of plastic is much better than the high temperature and pressure of the material from the sub-surface flying out will be very dangerous

8. Injection mold generally by thimble, sub-surface, etc. can be exhausted, Die-casting mold must open the exhaust slot and set the slag bag (collecting cold material head);

9. Inconsistent molding, injection mold injection speed, a pressure injection. Plastic mold is usually divided into several sections of injection

10. Die-casting mold for a 2-plate mold, plastic mold different product structure is not the same

At the same time the following points need to pay attention to:

1, the runner is not the same Die-casting mold runner is relatively wide, feeding GATE area to calculate the size of the product size, the general GATE thickness of the product as far as possible not to exceed the product thickness (75% on it), Die casting mode feed only one , While the plastic mold can be used to point into the plastic, the potential plastic mouth (or diving thimble), horn feeding, large outlet directly feed.

2, because the high temperature of the Die-casting (670 degrees), the mold material with the cooling requirements of the material to do with hot just 8407, DAC55, SKD61, etc. (Die, slider, male and female mouth) To balance the flow channel to go to cool, male and female irrigation mouth, male and female templates have to cool.

3, mold demolition as simple as possible (to consider the direction of the burr to facilitate the development of post-processing, sub-surface to consider exhaust, as with the Die surface level, the template exhaust mill (0.15MM), to add flash Difficult to shape the product but also increase the vacuum.

4, the mold structure as simple as possible not with the top (because the aluminum chip will Die stuck), fly to be careful, 0.05 ~ 0.06 or so will have flash, and easy to Die, if the slider.

5, the strength of the product than the plastic pieces of plastic parts, but with the same pieces of plastic as wall thickness to be uniform, BOSS column flesh more than 1.2MM do not need to add ribs, but the bottom must add R angle, corner also add R angle.

Druckgussform und Spritzgießen Unterscheidung

Spritzgussform und Werkzeugform grundlegende Unterschied Gießen ist, dass das Material nicht das gleiche ist, ein Kunststoff ist, eine Legierung ist, Druckgussform so große Kunststoff-Formenbau mehr aushalten als Druck und Temperatur, die Notwendigkeit, die Struktur der Form, Fördermodus zu stärken, Läufer, nicht das gleiche Kühl Design

1, der Einspritzdruck sterben Gussform groß ist, erfordert die Vorlage relativ dicker, Verformung zu verhindern

2, sterben Form Spritzgießwerkzeug Tor und unterschiedliche Bedürfnisse Gießen Shunt Kegel Zersetzung Strom von hohem Druck durchgeführt werden

3, Druckgussform nicht kernel Härten erforderlich ist, als Druckgussformhohlraum, wenn die Temperatur 700 Grad überschreitet, so jedes Mal, das Äquivalent eines Quench bilden. Der Hohlraum wird immer schwieriger geworden. Und allgemeine Spritzgießform zu HRC52 oder mehr gehärtet werden.

4. Die Gießhohlraum zu allgemeinen Nitrierbehandlung, Kleben Legierung Formhohlraum zu verhindern.

5. Allgemeine Korrosion Gießform relativ groß ist, die äußere Oberfläche im allgemeinen blueing.

6. Im Vergleich mit der Spritzform, Druckguss-Formteil mit Aktivität (wie Slide Core) mit dem Spalt größer zu sein,

Die Casting-Prozess, da die hohe Temperatur thermische Ausdehnung verursacht. Wenn der Spalt zu klein ist, wird dazu führen, Schimmel stecken

7. Die Gießform Trennflächen mit höheren Anforderungen, da die Legierung viel besser fließen als Kunststoff-Hochtemperatur-Hochdruckstrom aus der Trennlinie zu fliegen wird sehr gefährlich

8. in der Regel durch Spritzgießwerkzeug Fingerhut und andere Untergrund kann erschöpfen, Gussformen müssen Auslasskanäle und stellen Krätze (sammeln kaltes Material Fütterung Kopf) öffnen;

9. inkonsistent Formen, sterben Formeinspritzgeschwindigkeit Giessen, Spritzdruckperiode. Kunststoff-Spritzgussform in der Regel in Abschnitte gegliedert

10. Die Gießform ist eine Zwei-Platten-Formform, Kunststoff-Formenbau unterschiedliche Produktstruktur ist nicht das gleiche

Zugleich sollten die folgenden Punkte zu beachten:

1, ist nicht das gleiche runner runner sterben relativ breit, Futter GATE Bereich Gießen sollte entsprechend der Größe des Produktgewichts, des allgemeinen GATE so breit wie die Dicke von nicht mehr als die Dicke des Produkts (75% davon) berechnet werden, Druckgussform Futter nur einen Weg, und die Kunststoff-Form kann in den Kunststoff zeigen, die Kunststoff-Mund latent (oder versteckt Fingerhut), Sackgasse Futter, große Austritts direkte Einspeisung.

2, wegen der hohen Druckgusstemperatur (etwa 670 Grad), das Formmaterial mit einer höheren Kühlbedarf, Materialverbrauch Wärme nur 8407, DAC55, SKD61 usw. (Kernel-Modus, Schieber, männliche und weibliche Füllen der Mund), Formkernkühlung zu tun gleichmäßig zu balancieren, einen Läufer Kühlung, Bewässerung Mund männliche und weibliche, männliche und weibliche schablone auch gekühlt zu verlassen.

3, Schimmel Form Entfernung so einfach wie möglich (als leicht zu werden, nachdem die Richtung der Flash-Verarbeitung, Abgasteiloberfläche zu wachsen, so weit zu prüfen, wie möglich mit der flachen Oberfläche der Form, die Vorlage Mühle Entlüftung (etwa 0,15 mm), in den Überlauf, zu vergleichen, harte Produkte geformt, sondern auch evakuiert hinzufügen.

4, die Formstruktur kann nicht so einfach, Neigung verwendet werden (wie Aluminiumschrott stecken würde sterben), sorgfältig Flugmodus, wird es etwa 0,05-0,06 Blitz sein, und Easy-Modus zu halten, wenn sich der Schieber, Freiloch zu haben .

5, sterben Produktstärke Gießen als die Kunststoffteile gut ist, aber mit den gleichen Kunststoffteile wie Wanddicke sollte einheitlich sein, Spalte Fleisch 1.2MM BOSS nicht mehr Gaga Gluten brauchen, aber R müssen Sie die untere Ecke hinzugefügt werden, sollte die Ecke auch R erhöhen Winkel.

Die Casting-Prozess

Druckguss (für kurze Druckguss) ist eine Substanz, unter hohem Druck, ein flüssiges oder halbflüssiges Metall mit hoher Geschwindigkeit die-Typ Füllung der Kavität und Formen und Verfestigen unter Druck, ein Gießverfahren zu erhalten.

Features:
Druckguss und Hochleistungsfüllmaschinen Typ-Casting ist die zwei wichtigsten Merkmale. Es ist allgemein in der Einspritzdruck von den Tausenden bis Zehn kPa, sogar bis zu 2 x 105kPa verwendet. Füllrate von etwa 10 ~ 50 m / s, manchmal sogar bis zu 100 m / s oder mehr. Zeit Füllung ist sehr kurz, in der Regel im Bereich von 0,01 bis 0,2 s. Im Vergleich zu anderen Methoden der Gießen, Gießen hat die folgenden drei Vorteile:

Vorteile:
1. gute Qualität
Hohe Präzision Gießgröße, in der Regel das Äquivalent von 6 bis 7, sogar bis zu Grad 4; Oberfläche, in der Regel das Äquivalent von 5 bis 8, hohe Festigkeit und Härte, Festigkeit als Sandguss in der Regel um 25 bis 30% erhöht, sondern erstreckt sich reduzieren die Rate von etwa 70%, Dimensionsstabilität, Austauschbarkeit gut, kann sein Druckguss dünnwandigen Komplex. Zum Beispiel sterben die aktuelle Zink-Legierung Mindestwanddicke von bis zu 0,3 mm Gießen, Aluminium-Gusslegierungen von bis zu 0,5 mm; Steigung von mindestens 0,75 mm, die kleinste Blende 0,7 mm gegossen wird.

2. Hohe Effizienz in der Produktion
Maschinenproduktionsrate, wie häusliche JⅢ3 horizontal Druckgießmaschine kalte Luft 8 Stunden 600 bis 700 Druckguss- Durchschnitt kann, kleine heiße Kammer Druckgießmaschine alle acht Stunden im Durchschnitt von 3000 bis 7000 kann Druckguss, Werkzeugbau-Typ lange Lebensdauer, ein Paar von Druckguss-Typ, Druckguss-Legierung Glocke, das Leben von bis zu Hunderttausenden von Zeiten, oder sogar Millionen von Zeiten, einfach zu Mechanisierung und Automatisierung.

3. gute wirtschaftliche Wirkung
Da Gießen genaue Größe, glatte Blattwanne und so weiter. Im allgemeinen sind nicht mehr direkt bearbeitet werden verwenden oder Verarbeitungsvolumen ist klein, so dass nicht nur eine Verbesserung der Nutzungsrate des Metalls, sondern reduziert auch die Menge der Verarbeitungsausrüstung und Arbeit; Preis Gießen wird leicht sein, in Kombination mit Metalldruckguss oder andere nichtmetallische Materialien verwendet werden können . Speichern von Montagearbeiten und sparen Metall.
Während Gießen hat viele Vorteile, aber es gibt einige Nachteile zu lösen.

Nachteile:
1) Da das Flüssigmetall-Druckguss Kavitätenfüllung Geschwindigkeit hoch ist, ist der Strömungszustand instabil, so dass die Verwendung von allgemeinen Gussverfahren ist das Gießen leicht Porosität zu erzeugen, kann die Wärmebehandlung nicht durchgeführt werden;
2) des konkaven komplexen Gießen, Gießen erschwert;
3) Schmelzpunkt Legierungen (wie Kupfer, Eisen-Metalle), geringere Druck Typ Leben;
4) sollte nicht die Kleinserienproduktion sein, vor allem aufgrund der hohen Herstellungskosten Art Guss, Druckguss-Maschine Produktion von hocheffizienten, Kleinserienfertigung unwirtschaftlich.

Die Casting-Anwendung und Entwicklungstrends
Druckgießen eines der modernsten Metallformungsverfahren ist, ist ein kleiner Chip zu erreichen, Chip freie und effektive Art und Weise, eine sehr breite Anwendung, hat sich rasch entwickelt. Casting Größe und Gewicht, in Abhängigkeit von der Kraft der Druckgussmaschine. Aufgrund der zunehmenden Kraft der Druckgussmaschine, die Form der Größe von wenigen Millimetern bis zu 1 ~ 2m Gießen; Gewicht von wenigen Gramm bis zu zehn Kilogramm. Im Ausland Druck Durchmesser 2m, Gewicht 50 kg Aluminium-Gussteile.

Casting nicht mehr nur auf die Automobil- und Haushaltsgeräteindustrie, und nach und nach zu anderen Industriezweigen, wie zum Beispiel Landmaschinen, Werkzeugmaschinenindustrie, Elektronikindustrie, Rüstungsindustrie, Computer, medizinische Geräte erweitern, Uhren, Kameras und Haushalts Hardware Dutzende Industrie, insbesondere: Kfz-Teile, Zubehör Möbel, Bad-Accessoires (Bad), Beleuchtung Teile, Spielzeug, Rasierer, Krawattenklammern, elektrische eine elektronische Teile, Gürtelschnalle, Fall, Metallschnallen, Schlösser, Reißverschlüsse. In Druckgusstechnologie und die Entstehung eines Vakuums-Druckguss, neue Verfahren und Sauerstoff-Druckguss, Präzisionsdruckguss Geschwindigkeit dicht und löslichen Kernanwendungen.
Die Casting-Industrie unseres Landes bei der Förderung eine gute Rolle spielen.

china plastic injection molding mould making

Vor- und Nachteile von Druckgussverfahren

Essence Druckguß unter hohem Druck ist, die Flüssigkeit oder halbfeste flüssige Metall und Hochgeschwindigkeitsfüllung in den Gussformhohlraum, und das Formen und Abkühlen und Verfestigen unter Druck einer Druckguss (Druckguss-Maschine Teile) eines Form zu erhalten Prozess. So wird in der Hochdruck- und Hochgeschwindigkeits-Druckgussform Hohlraumfüllung zwei Merkmale Gussverfahren.
Die Casting-Prozess Was sind die Vorteile?

Essence Druckguss- Gießmaschine sterben steht unter hohem Druck, die flüssige oder halbfeste flüssige Metall und High-Speed-Füllung in den Gießformhohlraum und Formen und Abkühlung und Verfestigung unter Druck ein Druckguss (Druckguss-Maschine Teile) eines zu erhalten Spezies Umformprozesses. So wird in der Hochdruck- und Hochgeschwindigkeits-Druckgussform Hohlraumfüllung zwei Merkmale Gussverfahren.

Im Vergleich zu anderen Druckguss Druckgussverfahren hat seine eigenen Vorteile:

A, hohe Maßgenauigkeit Druckguss, geringe Oberflächenrauhigkeit;

B, hohe Materialausnutzung, weniger Verschleiß;

C können komplexe Formen herstellen, Konturen klar, dünnwandige Metall tiefen Hohlraum Druckguss-

D kann beim Gießen von anderen Materialien direkt Gussteile eingebettet werden, kostbares Material und Bearbeitungszeit zu sparen.

E, Gießen dichte, hohe Festigkeit und Härte.

Was sind die Nachteile von Druckguss-Prozess?

Alles in der Welt hat zwei Seiten, Druckguss-Verfahren ist keine Ausnahme, obwohl der Druckgussverfahren hat viele Vorteile, aber es gibt zwangsläufig gibt es viele dringende Probleme angegangen werden. Das Problem ist, dass die Druckgussverfahren Einschränkungen:

A, oft Gießen Porosität vorhanden ist: Das ist darauf zurückzuführen, Druckgießen, Metall Injektion flüssigen Zustand mit hoher Geschwindigkeit um den Hohlraum zu füllen, um den Hohlraum in dem zu spät abgegebene Gas zwangsläufig in das geschmolzene Metall gezogen, Porosität Mängel, reduzieren die Gussqualität. Zusätzlich Expansion des Gases Sprudeln Oberfläche der Poren innerhalb des Gießens bei hoher Temperatur wird ernsthaft das Auftreten von Druckguss beeinflussen, seine mechanischen Eigenschaften als Ganzes zu reduzieren. Somit wird das Gießen im allgemeinen nicht Behandlung und Schweißen Wärme ausgesetzt, und es ist nicht bei hohen Temperaturen arbeiten.

B, ist nicht geeignet für die Kleinserienproduktion: Der Hauptgrund ist die Druckgiessmaschine und sterben Formen kostspieliger Gießen, kombiniert mit hoher Effizienz in der Produktion Druckguss-Maschine, Druckguss-Prozess, so dass, obwohl Sie auf die Massenproduktion von niedrigen Stückkosten bringen kann, aber Kleinserienfertigung ist nicht wirtschaftlich.

C, Größe Gießen ist begrenzt: durch die Größe der Druckgussform Druckguss-Maschine Spannkraft und die Größe des Lademodus zu begrenzen, die Druckgussverfahren nur für kleine und mittlere Gussteile ist, und kann nicht in großen Gussteilen verwendet werden. In ähnlicher Weise für komplexe konkave Druckguss, sterben Form und das Prinzip der gebührenden Grenzen Gießen, seine Druckguss-Produktion ist auch schwieriger.

D, Druckguss-Legierung Typen beschränkt sind: Druckguß durch Temperatur begrenzt ist, und der Schmelzpunkt des Abschnitts Legierung zu hoch ist, in die vollständige Gießform Lebens zu niedrig ist, so dass die hohen Kosten, schwieriger in tatsächliche Produktion anzuwenden. Derzeit ist die Legierung für Gussproduktion hauptsächlich Zink-Legierung, Aluminium, Magnesium-Legierung und Kupferlegierungen und anderen NE-Metallen eingesetzt.

Mit Blick auf die oben genannten vier Arten von Beschränkungen, 2 und 4, beschränkt auf wirtschaftliche Kosten, begrenzt auf drei bestehenden Anlagen Bedingungen bis heute technisch langsam voran. Nur ein Druckgussprozess in dem Verfahren erzeugt wird, kann sie verbessert werden, zu reduzieren oder sogar vollständig die Erzeugung von Löchern durch bestimmte Techniken vermeiden.

In der Tat ist es auch die Frage der Anwesenheit von Poren, und ständig um die Verbesserung der Druckguss-Technologie fördern das Business-to-die zu erfüllen Gießen Qualitätsanforderungen weiter zunehmen, sondern auch den Anwendungsbereich der Druckgussverfahren zu erweitern.

Prototype automotive mold -auto Injection Molding Parts

Die-casting process

Pressure casting (referred to as Die-casting) is the essence of high-pressure, the liquid or semi-liquid metal at a higher rate of filling Die-casting cavity, and under pressure forming and solidified casting method to obtain.

Features:

High-pressure and high-speed Die-casting Die casting is the two major characteristics. It is commonly used pressure injection pressure from a few thousand to tens of thousands of kPa, or even up to 2 × 105kPa. Filling speed of about 10 ~ 50m / s, sometimes even up to 100m / s or more. Filling time is very short, usually in the range of 0.01 ~ 0.2s. Compared with other casting methods, Die casting has the following three advantages:

advantage:

1. Good product quality

Casting size precision, generally equivalent to 6 to 7, or even up to 4; surface finish is good, generally equivalent to 5 to 8; strength and hardness is higher, the intensity of sand casting than the general increase of 25 to 30% Rate reduced by about 70%; dimensional stability, good interchangeability; can cast thin-walled complex castings. For example, the current minimum thickness of zinc alloy Die-castings up to 0.3mm; aluminum alloy castings up to 0.5mm; minimum casting aperture of 0.7mm; minimum pitch of 0.75mm.

2. High production efficiency

High productivity, such as domestic JⅢ3 horizontal cold Die casting machine can be an average of eight hours 600 to 700 times, small hot chamber Die-casting machine can be an average of every eight hours of Die-casting 3000 ~ 7000 times; Die-casting long life, Die-casting bell alloy, the life of up to hundreds of thousands of times, or even millions of times; easy to achieve mechanization and automation.

3. Economic effect is fine

Due to the precise size of the Die casting, table Pan Guangjie and so on. Generally no longer mechanical processing and direct use, or processing volume is small, it not only improves the metal utilization, but also reduces a lot of processing equipment and working hours; casting prices will be easy; can be combined with other metal or non-metallic materials . Saving both assembly man-hours and metal savings.

Die casting although there are many advantages, but there are some shortcomings, yet to be resolved.

Disadvantages:

1). Because of the high filling rate of the liquid metal and unstable flow in the Die casting, it is easy to produce porosity by the general Die-casting method and can not be heat-treated.

2). For concave complex castings, Die casting is more difficult;

3). High melting point alloys (such as copper, ferrous metals), Die-casting lower life expectancy;

4). Not small batch production, the main reason is the high cost of Die-casting manufacturing, Die-casting machine production efficiency, small batch production is not economical.

Application Scope and Development Trend of Die Casting

Die casting is one of the most advanced metal forming methods, is to achieve less chip, no chip effective way, the application is very wide, rapid development. The size and weight of the casting depends on the power of the Die-casting machine. As Die-casting machine power increases, casting size can be from a few millimeters to 1 ~ 2m; weight can be a few grams to tens of kilograms. Foreign castable diameter of 2m, weight 50kg of aluminum castings.

Die casting is no longer limited to the automotive industry and instrumentation industry, and gradually expanded to other industrial sectors, such as agricultural machinery, machine tool industry, electronics industry, defense industry, computers, medical equipment, watches, cameras and household hardware, Electronic components, belt buckle, case, metal decorative buckle, locks, zippers, and so on.Our products are exported to the United States, Europe, the United States and other countries and regions. In the Die-casting technology has emerged in vacuum Die-casting, oxygen Die-casting, precision-speed Die-casting and soluble core applications such as new technology.

Will Die casting industry in China has a very good role in promoting.

What is Die casting

Die casting is a manufacturing process for producing metal parts by forcing molten metal under high pressure into a die cavity. Generally speaking, these die or mold cavities are created with hardened tool steel that have been previously machined to the net shape or near net shape of the die cast parts. This process allows products to be made with high degree of accuracy and repeatibility. The Die casting process also produce fine details such as textured surfaces or names without requiring further processing.

The ability of producing high detailed and high accuracy parts make Die casting a suitable choice for mass produced product. The moment you wake up you are surrounded products that are produced by the Die casting process. When you turn the faucet, you open the door knob, when you drive your car, almost every product or part of the product you use in your daily life is produced using this process.

The Die casting process usually produce parts using primarily non-ferrous metals, such as zinc, copper, aluminum and magnesium. Over the years, many different alloys have been developed to meet certain type of needs and requirements of each application.

Type of Die casting processes

The Die casting process can be further divided into two different categories:

Hot Chamber Die casting

Cold Chamber Die casting

Hot Chamber Die casting is the process where the injection system is immersed in pool of molten metal hence the name.  The furnace is attached to the machine via a feeding system called a gooseneck.  As the cycle begins the piston will retracts, which allows the molten metal to fill the “gooseneck” from a port in the injection cylinder. As the plunger move downwards, it  seals the port and forces the molten metal through the gooseneck and nozzle into the die.  Once the metal solidifies, the plunger will pull upwards.  Afterwards, the die will open and the part is ejected.  The advantage this process its short cycle time as it does not require metal to be transported from a separate furnace.  Unfortunately, this Die casting process is only suitable for alloys that do not attack the injection cylinder such as zinc, magnesium and copper.

Cold Chamber Die casting is the process of using a ladle to transport the molten metal from the holding furnace into the unheated shot chamber or injection cylinder.  This metal is then shot into the die by using a hydraulic piston.  The main disadvantage of this process is that it is relatively slower compared to the Hot Chamber Die casting  process.  However, this process is primarily used for manufacturing aluminum parts as molten aluminum alloys have a tendency to attack and erode the metal cylinders, plungers and dies greatly shortening their tool life.

History

The Die casting process dates back to the mid 1800s, when a patent was awarded to Sturges in 1849 for the first manually operated machine for casting printing type.  However, it was not until 20 years later that this process has been used to produce other consumer products such as phonographs and cash registers.

In the beginnings, tin and lead are the primary alloys used for the Die casting process, but these alloys have been replaced by zinc and aluminum since the 1920s.

As technology advances, the Die casting process has become more and more efficient.  New technologies allow greater pressure in the injection process, thus allowing us to produce parts that are closer to net shape and higher integrity than ever before.

Advantages of Die casting Parts

One of the main advantages of Die casting is the ability to produce parts and products with a wide range of shape and sizes.  Unlike other manufacturing processes such as extrusion, the Die casting process does not limit the shape of parts and in most cases will be the net shape of the parts.

Durability:

Unlike plastic parts, die cast parts are stronger than their plastic counterparts.  In most cases, this allows parts to be produced with thinner walls while maintaining the strength that is required for its application.  Furthermore, die cast parts are able to withstand to a broader range of temperature, making it more ideal in harsh temperatures and working environments.

Mass production at high speed:

Since the Die casting process can allow manufacturers to produce complex parts to net shape, there is little or no machining processes required thus reducing the production time making Die casting one of the most effective process to mass produce non-ferrous metal complex parts.

Green Manufacturing:

How long does it takes for plastic to biodegrade?  According to scientists, plastics takes at least a few hundreds of years to degrade fully.  This means that obsolete plastic products are pilled up in the landfills, polluting our beaches, killing millions of sea animals and causing health hazards to the inhabitants in our neighborhoods.  Unlike plastic, Die casting parts are primarily made of recycled material.  On average, approximately 95% of the metal is recycled from salvaged parts making it a sustainable material that can be used over and over again without degradation.

Thinner Wall Castings:

Compared with sand and permanent mold castings, the Die casting process is able to produce parts with thinner walls due to the high pressure during the injection process.  This allows lightweight construction as well as eliminate or reduce the need of secondary operations.

Casting with inserts:

The Die casting process allows inserts to be cast-in to form certain features such as threaded inserts, heating elements or high strength bearing surfaces.

Vacuum thermoforming advantage

Vacuum thermoforming can produce the smallest pieces of tablet packaging materials or watches with the battery, you can also produce very large products, such as 3 ~ 5m long garden pool. The thickness of the molding material can be from 0.05 to 15mm, for foam materials, the thickness can reach 60mm. Any kind of thermoplastics or materials with similar properties can be vacuum-formed.

The materials used in the vacuum thermoforming molding are sheets having a thickness of 0.05 to 15 mm, and these sheets are semi-finished products made of pellets or powder. Therefore, compared to injection molding, vacuum thermoforming the raw materials will increase the additional cost.

 In the vacuum thermoforming molding need to cut the sheet, which will produce scrap. The scraps are crushed, mixed with the original material, and then the sheet is formed again. In vacuum thermoforming, only one surface of the sheet is in contact with the vacuum thermoforming mold, and therefore only one surface conforms to the geometry of the vacuum thermoforming mold, and the contour of the other surface of the article is drawn.

 In the field of plastic processing, vacuum thermoforming is considered to be a great potential for development of processing methods. It uses molding molding, suitable for all areas of plastic packaging. Vacuum thermoforming is also a need for skilled operation and experience of processing methods. Nowadays, vacuum molding has evolved into a technically controllable and reproducible processing method through the simulation process and the necessary expertise.

In recent years, recycling in the vacuum thermoforming process has become increasingly important. Today, scrap has been formed into a process by reclaiming it by mixing it with the virgin material. Waste plastic moldings, such as packaging materials and even engineered parts, are recyclable under many conditions, but some remain to be developed. At present, the recovery is mainly carried out by a number of chemical materials and energy materials. To make a breakthrough in recycling, we must work in the process of ecological and conservation efforts.

Vacuum thermoforming products with low cost, high efficiency, shape and color matching freedom, corrosion resistance, light weight and electrical insulation properties, etc., in stationery, toys, daily necessities, Wujinjiaodian, electronic products, food , Cosmetics and other products, packaging, has been developed to billboards, automotive, industrial accessories, building materials, helmets, washing machines and freezers lined with turnover boxes and agricultural products and other products

China Die Casting Guide

In the high-pressure, high-speed conditions, the molten alloy under filling, solidification and cooling casting method formed under high pressure.

Die-casting 

Die casting is a method of casting liquid forging, the completion of the A special die forging machine technology. The basic process is: first low or high speed liquid metal casting filling into the cavity of the mold, the mold has a cavity surface activity, cooling it with liquid metal forging pressure, which eliminates blank Shrinkage pine defects, but also to achieve the internal organization of the blank forging state of broken grains. Blank mechanical properties has been significantly improved.

Significant advantage of Die-casting :

1, good quality: high precision casting size, surface finish, high strength and hardness, dimensional stability, good interchangeability;

2, high efficiency: high productivity machine, small hot chamber die casting machine aluminum die-cast aluminum

can on average every eight hours from 3000 to 7000; long life die-cast aluminum type, a pair of die-cast aluminum type, die-cast aluminum alloy bell, life of up to tens of million times, or even millions of times; easy to mechanization and automation.

3, the economic effect of the fine: As the die-cast aluminum precise size, smooth sheet pan and so on. Generally

no longer be machined directly use or processing volume is small, so not only improves the utilization rate of the metal, but also reduces the amount of processing equipment and labor; casting cheap price; combination of

die-cast aluminum with other metals or non-metallic materials may be used . Saving assembly work and save

metal.

Compared with other metal forming processes, the characteristics of Die casting are:

(1) the productivity is extremely high, the production process is easy to realize the mechanization and the automation. General cold chamber die casting machine every eight hours can be 600 to 700 times the die-casting, hot-pressing die-casting machine every eight hours to die-casting 3 000 to 7 000 times. And a die-casting mold cavity often more than one, so that the number of die-casting production will also exponentially increased.

(2) high dimensional accuracy of the casting, the size of stability, consistency, and less processing allowance and a good assembly. Die-casting of the accuracy of up to IT11 ~ IT13 level, and sometimes up to IT9 level. Surface roughness values are generally Ra0.8 ~ 3.2, the lowest up to Ra0.4. General die castings only a few parts of the size of machining, and some parts without even mechanical processing can be directly assembled to use. This high utilization of materials, up to 60% to 80%, rough utilization rate of 90%.

(3) casting dense organization, with high strength and hardness.

In China Die casting mold main application industries

Our product categories are more Die-casting mold, the price is relatively low, which is China’s Die casting products a big advantage in the international market, so that gives us inspiration, we can choose a better sales prospects for products in

the product as a casting mold Key to the development of export, which then die-casting mold products can be used as such

a focus on the development of products it, let’s take a simple analysis of several:

      1. Automotive industry：

The main car cover mold: automobile panel dies for the automotive facilities, also including agricultural vehicles, construction machinery and agricultural machinery supporting the cover mold, which are mostly medium-sized, complex structure, high technical requirements. Especially for cars matching cover mold, more demanding. Such mold China has certain technical basis, we have been supporting for the mid-range cars

Application of Die Casting Aluminum Alloy in Motorcycle

             Automobile, motorcycle industry, in all industrialized countries are important pillar industries, China is no exception.In the present, the world “energy saving, environmental protection” big situation, aluminum, magnesium alloy castings, especially high-grade castings Demand is long-lasting, which provides excellent market conditions for the development of the squeeze casting industry The motor industry faces a serious challenge, as in the automotive industry, which has been proven to improve design and use of lightweight materials with low density But the improvement in
design has little potential, and in today’s technology conditions, the greatest potential is to use as many lightweight
materials, components, available lightweight materials are aluminum, magnesium , Titanium, plastics, composites, 3D printing, etc., however, from the present to 2025Year, aluminum is the most practical lightweight material, because the production of aluminum and its parts and components manufacturing technology is already very mature, have the highest price, is the best recyclable materials, is the most resources Rich natural materials.

Material Selection of Die Casting

The service life of die-casting mold and die-casting mold material is closely related. Die-casting mold zero, the components are mainly divided into contact with the metal parts, sliding parts and mold parts with structural parts. Die-casting mold

cavity and runner and other components in the metal pressure casting production process, directly with the high temperature, high pressure, high-speed metal liquid contact. On the one hand by the metal liquid direct erosion, wear, high temperature oxidation and corrosion. On the other hand, due to the high efficiency of the production, the mold temperature rise and decrease is very severe, and the formation of periodic changes. Therefore, the die casting mold working environment is very bad. Therefore, attention should be paid to the selection of the material for manufacturing the die casting mold.

China Die casting

Plastic applications and advantages in the medical industry

Plastic applications and advantages in the medical industry

Medical equipment related to the pharmaceutical industries, machinery, electronics, plastics, etc., wherein the plastic rapid development of medical devices. Since the 1930s people first used synthetic polymer materials - since celluloid film is formed as an artificial kidney dialysis membrane used in clinical success, polymer materials are gradually replacing traditional inorganic materials such as metal, glass, ceramic, apatite stone for the preparation of medical devices.

This is reason:

(1)     polymer material having good mechanical properties and chemical stability, more suitable for medical use;

(2) polymer material rich source of inexpensive, disposable medical supplies made for avoiding the problem of sterilization and secondary infection due to the high cost of traditional materials and products have caused repeated use;

(3) having a plastic or modified more easily get a good histocompatibility and blood compatibility of products;

(4) Plastic low production costs, for a variety of molding methods, ease of processing into complex shapes and the development of new medical products.

Plastics in the medical industryadvantages:

From medicines and pharmaceutical packaging, the needle tube, hose, disposable surgical instruments and other medical equipment can be seen in the presence of plastic instruments.

Disposable medical device market demand potential is why so big, its main advantage is the following aspects:

1, light weight, effort, will help reduce fatigue caused by surgery doctors for a long time.

2, toughness is good, strong anti-permeability, durability, some plastics can also be used normally at high temperatures.

3, transparent, medical procedures can be better observed, especially during surgery.

4, easy to shape, for the production of a variety of shapes, complex medical equipment and supplies, and simply use the low-cost production process. High-temperature sterilization using disinfectant or corrosion does not occur or the color change phenomenon.

5, compared to metals and other raw materials, low cost, more suitable for the production of disposable consumables, after sterilization as packaging materials help to reduce the risk of infection.

6, compared with ceramic or glass and other fragile materials, the use of more safety, especially as packaging materials.

Plastic products also have advantages in the automotive industry

With the increase of the proportion of population growth and an aging population, the demand for plastic medical equipment continued to expand, particularly into the human body equipment. The use of medical equipment from a single to diversified development, the volume size is shrinking, now an equipment can replace conventional multiple pieces of equipment. Because many outstanding advantages of plastic medical equipment, pharmaceutical industry in the future course of development, its market share and influence will grow.

Die-casting applications in various industries

Die-casting applications in various industries

Aluminum die-casting is a pressure cast parts, pressure die cast by casting machine, a heated liquid aluminum or aluminum alloy is poured into the die casting machine feed inlet, the die-casting machine casting, casting mold limits the shape and size of aluminum parts or aluminum alloy parts, such parts usually called aluminum die-casting. Aluminum die-casting in different places have different terminologies, such as aluminum die-casting parts, aluminum die-casting parts, die-cast aluminum, die-cast aluminum, aluminum die casting, aluminum die-casting parts.

Casting is relatively early humans mastered a metal thermal processing,Is usually performed using gravity casting metal in a mold.However, aluminum die-casting is not done by gravity, but exert some pressure,A bit like "injection."But it has a high-tech pumping core cooling system.

Overall, a centralized entrance through the material to be cast, "Note" made in the cavity formed parts.

Since aluminum and aluminum alloy has good fluidity and plasticity, and the casting process is casting pressure die casting machine, die-cast aluminum and therefore can make a variety of more complex shapes can also be made high accuracy and finish and thus greatly reduce the amount of machining and casting of aluminum or aluminum alloy casting margin, not only saves electricity, metal materials, but also a significant reduction in labor costs; and aluminum and aluminum alloy with excellent thermal conductivity, and a smaller proportion of high workability;

Die-cast aluminum three major advantages:

1, good quality: high precision casting size, surface finish, high strength and hardness, dimensional stability, good interchangeability;

2, high efficiency: high productivity machine, small hot chamber die casting machine aluminum die-cast aluminum can on average every eight hours from 3000 to 7000; long life die-cast aluminum type, a pair of die-cast aluminum type, die-cast aluminum alloy bell, life of up to tens of million times, or even millions of times; easy to mechanization and automation.

3, the economic effect of the fine: As the die-cast aluminum precise size, smooth sheet pan and so on. Generally no longer be machined directly use or processing volume is small, so not only improves the utilization rate of the metal, but also reduces the amount of processing equipment and labor; casting cheap price; combination of die-cast aluminum with other metals or non-metallic materials may be used . Saving assembly work and save metal.

Therefore, aluminum die-casting is widely used in automobile manufacturing, engine production, motorcycle manufacturing, motor manufacturing, pump manufacturing, transmission machinery, precision instruments, landscaping, power construction, architectural decoration and other industries. Aluminum die casting can be manufactured as a die-cast aluminum auto parts, aluminum die-casting automobile engine fittings, aluminum die-casting engine cylinder, die-cast aluminum cylinder gasoline engine cylinder head, valve rocker aluminum die-casting, die-cast aluminum valve seat, aluminum die-casting power accessories, die-cast aluminum motor cover, die-cast aluminum housing, die-cast aluminum pump housing, aluminum die casting construction accessories, decorative accessories aluminum die-casting, die-casting aluminum fence parts, aluminum die-cast aluminum wheels and so on parts.

china plastic injection molding

Common types of plastics, advantages and disadvantages and main flaw

Plastic is a resin as a main component, at a certain temperature and pressure molded into a certain shape, and at room temperature can be maintained given the shape of the high molecular weight organic material. Plastic light weight, high strength. Usually density 0.9-2.3g / mm³ is 1 / 8-1 / 4, 1/2 of aluminum, iron and steel excellent electrical insulation properties, good chemical stability, anti-friction wear resistance, light transmittance and protective properties Good, good damping silencer performance. After heating the surface of the plastic according to the performance into thermosetting plastics and thermoplastics. Occur at a certain temperature over a period of time of heat, pressure or added hardener chemical reaction and hardened, hardened plastic chemical structure changes, hard, insoluble in solvents, no longer softened after heating, such as temperature: thermosetting plastic Features too high to decompose. Such as Bakelite (commonly known as bakelite), epoxy plastic (EP) and the like. Thermoplastic Features: biological state change hair after being heated to soften or melt into a sticky fluid state from a solid, but can harden after cooling from solid, and the process can be repeated many times. The molecular structure of the plastic itself is not changed. Plastics such as polyethylene (PE), polyvinyl chloride (PVC).

PC material (polycarbonate)

Advantages: 1 has high strength and elastic modulus, high impact strength, wide temperature range.

2. High transparency and freedom of dyeing

3. good fatigue resistance

The excellent electrical characteristics

5. low mold shrinkage, good dimensional stability.

Disadvantages: 1. hydrolysis resistance

2. chemical resistance, notch effect

3. The problem is easy to produce finished poorly designed internal stress.

Chemical and physical properties: PC is a non-crystalline engineering materials, with a particularly good impact strength, heat stability, gloss, inhibit bacterial properties, flame retardant properties and fouling resistance. PC de gap estimated impact strength in Iraq (otched Izod impact stregth) is very high and very low shrinkage rate, usually 0.1% to 0.2%. PC has good mechanical properties, but poor flow characteristics, so the injection molding process more difficult this material. PC quality in the selection of the material, we should expect the final product as a benchmark. If the plastic parts require high impact resistance, then use a low turnover rate of PC material; the other hand, you can use the high turnover rate of PC material, which can optimize the injection molding process.

Material ABS (acrylonitrile - butadiene - styrene copolymer, commonly known as: super glue is not broken)

Advantages: 1. hard, easy extrusion

2. Flame

3. easy to dye

4. Impact

5. The surface resistance

Disadvantages: 1. poor solvent resistance

2. Low Dielectric strength

3. Low stretch rate

Forming characteristics: 1. amorphous material, liquid medium, moisture large, must be fully dry, glossy plastic surface should take time to preheat the drying 80-90 degrees, 3 hours

2. should take high melt temperature high mold temperature, high precision mold, mold temperature should take 50-60 degrees, high-gloss heat-resistant plastic parts, mold temperature should take 60-80 degrees.

Chemical and physical properties: ABS is, butadiene and styrene of three monomers synthesized from acrylonitrile. Each of the monomers having different characteristics: acrylonitrile high strength, thermal stability and chemical stability; butadiene have toughness and impact resistance properties; styrene easy processing, high-quality finish and high strength. Morphologically, ABS is an amorphous material. Polymerization of three monomers produces a terpolymer having two phases, a styrene - acrylonitrile continuous phase, and the other is a polybutadiene rubber dispersed phase. The properties of ABS depends on the ratio of the monomers and the molecular structure of the two phases. This allows great flexibility in product design, and the resulting market hundreds of different quality ABS material. These different quality materials offer different characteristics, such as moderate to high impact resistance, from low to high finish and high heat distortion characteristics. ABS material with superior ease of processing, appearance, low creep and excellent dimensional stability and high impact strength.

Of course, various problems will be encountered in the injection molding project. The following is the solution.Plastic products cracking and deformation causes

The hot runner role in injection molding

80 %of life goods need to through the injection molding

Mold is closely related to our life, More than 90% of the life of the article to be processed through the die is made,While 80% of goods go through the plastic molding, plastic mold temperature should reach 300 ℃ or more. Due to the special shape of the plastic mold, with traditional insulation materials can not be insulated on the lower mold high temperature heat loss of a great, severe heat loss, high temperature metal mold thermal fatigue loss is large, and so on. Plastic mold heat great loss, not only directly increase the cost of production, but also due to frequent replacement of the mold caused by mass production line shut down frequently result in greater economic losses.

Hot runner injection molding is used in conjunction with the mold, and play a very important role, such as in the production of ultra-thin plastic injection parts, by using the runner can easily produce high-precision, high-quality products out; for illiquid injection molding material by using a runner can improve the flow of raw materials, to ensure smooth production of injection molding; for some large plastic parts such as car bumpers and door panels, rear shell TV, air conditioning and so on through the hot runner can shell very difficult injection molding becomes relatively simple.

Ues hot runner to reduce injection molding products cost

In the multi-cavity injection mold, the lack of hot runner molding is difficult, it can be said so far is to ensure the hot runner runner balance of the best technology. Because of the presence of plastic hang shear forces in the flow, regardless of the geometry of a mold having more than a reasonable balance, the weight of the molded product is difficult to come out of the same, especially in terms of multi-cavity molds.

For plastics processors, as long as there is a certain volume of injection molding using a hot runner it is quite economical, because the hot runner nozzle to help businesses get rid of in the production of injection molding, which not only saves raw materials, and to cut labor costs and make products more perfect appearance. We all know that in most cases the drain can not be reused, if not at times the weight of the hot runner nozzle and the weight of the product is almost, if the traditional way means that the injection nozzle producing a product must be a product of almost a waste of raw materials as waste, and therefore only this not only saves raw materials, and to cut labor costs, but also make the product more perfect and beautiful. In addition, the runner also help reduce mold wear, extend die life. In general, the hot runner mold life is twice as small inlet of the mold.Of course, there are many factors that affect the life of the mold.In addition to the hot runner, we also use the air poppet device

Our company offers a reasonable solution

Runner simple composition, but each component plays an important role. Generally good quality hot runner design and structure of the material requirements are very high. We can according to the customer's product, the design a reasonable solution, to ensure the hot runner injection molding system can play a maximum efficiency. As our company uses Han Guorui runner, the choice of heaters and temperature line all imported from South Korea, the steel used for all materials imported from Japan, which is to ensure the quality of these hot runner prerequisite.

Characteristics and development of rapid prototyping

Rapid Prototyping (Rapid PrototypingManufacturing, abbreviated RPM), high-tech manufacturing technology is based on a material deposition method, it is considered the last 20 years, a major achievement in the field of manufacturing. It combines mechanical engineering, CAD, reverse engineering, layered manufacturing technology, numerical control technology, materials science, laser technology in one automatically, directly, quickly and accurately convert design to prototype with a certain function or direct manufacturing of parts , so as part prototyping, calibration, etc. the new design provides a cost-effective means of achieving. That is, rapid prototyping technology is the use of three-dimensional CAD data, through rapid prototyping machine, the stacked layers of material into a physical prototype.

Rapid Prototyping Features

(1) prototyping materials used are not limited to, a variety of metallic and non-metallic materials can be used;

(2) prototype reproducibility, high interchangeability;

(3) regardless of the manufacturing process prototyping geometry, more favorable when machining complex surfaces;

(4) Processing cycle is short, low-cost, independent of the degree of cost and complexity of products, general manufacturing costs by 50%, saving more than 70% of the processing cycle;

(5) a high degree of technology integration, to achieve the integration of design and manufacturing;

The practical application of rapid prototyping technology, mainly in the following aspects:

(1) Application of the new product design process of rapid prototyping technology to build a new product development model for industrial product design and development staff. The use of RP technology to quickly, directly and accurately design ideas into physical model has a certain function (sample), which not only shorten the development cycle and reduce development costs, but also enable enterprises occupy the first in the fierce competition in the market machine.

(2) in the field of machinery manufacturing technology due to RP own characteristics, so that it is in the manufacture of machinery for a wide range of applications, used for manufacturing a single-piece, small batch manufacturing metal parts. Some special complex parts, because only single-piece production, or less than 50 small quantities, usually can be molded directly by RP technology, low cost, short cycle.

(3) rapid tooling traditional mold for a long time and high cost. The rapid prototyping technology with traditional mold manufacturing technology, can greatly shorten the development cycle of the mold manufacturing, increased productivity, it is an effective way to mold design and manufacturing weaknesses addressed. Rapid Prototyping technology in mold manufacturing can be divided into direct and indirect molding molding two types of direct molding is the use of RP technology directly stacked to create a mold, indirect molding is a rapid prototyping system first part, and then copy the parts obtain the desired mold.

Rapid Prototyping Development Direction

From the current status of research and application of RP technology point of view, further research and development of rapid prototyping technology, mainly in the following aspects:

（1）Rapid development of good performance molding material, such as low cost, easy to shape, small deformation, high strength, durability and non-polluting molding material.

(2) increase the processing speed RP system and open up a parallel process for manufacture.

(3) rapid prototyping systems to improve reliability, increase their productivity and production of large capacity, optimize the device structure, in particular to improve the forming precision, surface quality, mechanical and physical properties of the member, provide a basis for further mold and functional assays .

（4）RPM high-performance software the development of rapid prototyping. Improve the speed and accuracy of data processing, research and development of the use of the original CAD data directly slice of ways to reduce the STL format conversion generated by the slicing process and loss of accuracy.

IML (In Mold Label)technology introduction and development trends

IML's Chinese name: injection mold inserts its remarkable features is the process: the surface is a layer of hardened transparent film, the middle layer is printed patterns, the back is plastic layer, since the ink in the middle, the product can prevent surface scratches and abrasion, and can be difficult to maintain long-term bright colors fade.

                                                         

IML technology introduction

                                             

Keywords: IML IMD molding process

The concept of IML

IMD (In-Mold Decoration) Film is a film placed in the injection mold decorated plastic exterior surface of the new technology. Currently IMD has two manufacturing methods, one is to be made into a film Film printed circulation drum roll band, mounted in the injection molding machines and injection molds, as Label label affixed to the front surface of the mold fully automatic cycle with mobile production out; that is, people called IMD (injection transfer in the mold).

Another is to pass a good film printing Film Forming molding machine, then placed after the cut produced in the injection mold. That is called IML (in mold foil injection). This Film can generally be divided into three layers: a substrate (typically PET), an ink layer (INK), gluing material (mostly a special adhesive).

When the injection is completed, the adhesive effect makes plastic Film and closely integrated, because of their positive surface covered with wear-resistant protective film on the outermost layer of PET, there is abrasion and scratch effect, the surface hardness reach 3H, and will feel more brighter. Wherein the molding material is more PC, PMMA, PBT, and so on. As shown below:

IML process step

Conference materials --- --- flat printing ink drying protective film stickers fixed --- --- --- punching positioning holes cut peripheral shape thermoforming --- --- material injection molding process as follows: specific instructions as follows:

1) Conference materials: Film roll of the film has been cut into a square block sizes designed for printing, molding process used.

2) flat printing: according to the requirements of icons, text manufactured Philippine forest belt, cut a good film on the square block printing Film icon, text.

3) Fixed ink drying: The printed film Film square placed in a high temperature oven drying, aimed at fixing IML ink.

4) Protective Film: Avoid red when positioning hole step to get to spend a good film Film printed surface, and sometimes need to paste single or double layer of protective film.

5) positioning hole punch: positioning hole thermoformed certain quasi-hub. Positioning hole cutting operations sometimes also punched in advance.

6) Thermoforming (high or copper mold): After the printed film is heated with a high-pressure molding machine or mold in the warm-up state.

7) Cut the peripheral shape: the scrap molding good stereoscopic film cut off.

8) Injection material: the three-dimensional shape after molding die in front of exactly the same film placed on the front mold, injection molded IML products.

IML technology advantages and disadvantages

Advantages:

1) Film production cycle is short, the performance of multiple colors;

2) in the production of patterns and colors can be changed at any time;

3) IML outermost layer is FILM, silkscreen ink on the intermediate layer, smooth surface appearance, the more light touch, with excellent scratch resistance;

4) Number of IML production volume is very flexible and suitable for many varieties of small production

Disadvantages:

1) pre-long period;

2) easy to produce the film off, distortion, etc.;

3) poor product rate

In addition to this new technology, we also specialize in the production of Die-casting .

Injection mold manufacturing characteristics and requirements

Plastic mold production of general machinery products in common, and also that its particularity. Compared with the general machinery manufacturing, mold manufacturing is generally difficult, especially precision molds. As a special technical equipment, tooling and production process are the characteristics of the following aspects.

1. Precision mold manufacturing, high quality requirements, not only requires high precision, but also processing the surface of good quality. In general, the working part of the mold manufacturing tolerances should be controlled within ± 0.011mm, and some even claim within the micron range, surface defects after mold processing requirements are very strict, and the surface roughness of the working part of Ra <0.8 um.

2. The complex shape of the working part of precision molds are generally two or three dimensional complex surface (especially the cavity mold), rather than the general machining of simple geometric profile.

3. The mold as a single piece, production of many varieties of each pair of mold can only produce a certain shape, size and accuracy parts. In the manufacturing process as much as possible the use of common tools, common measuring tools and instruments, as much as possible to reduce the number of special tools. In the manufacturing process of the step arrangement requires relatively concentrated, in order to ensure the quality and accuracy mold, simplify management and reduce the process cycle time.

4. The high hardness of the material is actually a plastic mold machining tool, its high hardness, are generally made of hardened alloy tool steel or carbide and other materials, if manufactured using conventional machining methods, tend to difficult, so mold processing method different from the general machining.

5. Due to the short production cycle and accelerate the upgrading of increasingly fierce market competition, requiring mold production cycles are getting shorter. Mold production management, design and technological work should meet this requirement, to improve the mold design, manufacturing and standardization, in order to shorten the manufacturing cycle.

6. When a complete set of production parts need more deputy mold, a mold before the manufactured products are mutually implicated restrict Yi blank mold, mold parts, and only eventually qualified parts, which was a series of mold considered qualified. In the production and scheduling of the mold must take full account of this characteristic.

Injection mold processing is divided into several stages？

The injection molding process can be roughly divided into the following six stages

Clamping, glue, pressure maintaining and cooling, mould and products.

The above process again and again, can batch periodically to produce products. Thermosetting plastic and rubber molding including the same process, but a thermoplastic material barrel temperature is low, the injection pressure is higher, the mould is heated, finished material injection in the mold of the subject to curing or curing process, and then strike off membrane.

The trend of the current processing technology is developing towards the direction of the high and new technology, these technologies include: micro injection molding, high filling compound injection, water injection, mixed with a variety of special injection molding process, foam injection molding, mold technology, simulation technology, etc.

The temperature control

Injection molding equipment and mold

1．nitrogen-treated barrel temperature, injection molding process, the need to control the temperature of the cylinder temperature, nozzle temperature and mould temperature, etc. The first two main influence plastic plasticizing temperature and flow, and then a temperature is mainly influence plastic flow and cooling. Each kind of plastic flow with different temperature, the same kind of plastic, due to different sources or brand, the flow temperature and decomposition temperature is little different, this is due to the different average molecular weight and molecular weight distribution, plastic in different type of injection machine of plasticizing process is also different, so choose the cylinder temperature is not the same.

2. The nozzle temperature, nozzle temperature is usually slightly lower than expected tube maximum temperature, this is to prevent the molten material in straight through the nozzle may be "salivate phenomenon". Nozzle temperature also cannot too low, otherwise will cause early setting of melting and the nozzle clogging, or due to early coagulation material into the cavity affect the performance of the products.

3．Pictures of mold temperature, mold temperature inner performance and apparent impact on the quality of products. Mold temperature is determined by the size of the plastic, of crystalline products and structure, performance requirements, and other process conditions (melt temperature, injection speed and injection pressure, molding cycle, etc.).

Pressure control

In the process of injection molding pressure including plasticizing and injection pressure, and directly affects the quality of plasticizing and plastic products.

1．plasticizing pressure: (back pressure) adopts screw injection machine, screw at the top of the molten material in the screw rotating back pressure is called the plasticizing, which is also called back pressure. The size of the pressure can be found on the overflow valve to adjust the hydraulic system. In injection, the size of the plasticizing pressure is depending upon the design of the screw, the product quality requirements, and the type of plastic and needs to change, if the situation and the screw rotation speed is constant, increase plasticizing pressure will strengthen shearing action, which will raise the temperature of the melt, but will reduce the plasticizing efficiency, increase the current and leakage flow, increase the driving power.

In addition, increase plasticizing pressure often can make the melt temperature uniformity, color mixing and discharge gas in the melt. general

Injection molding in the operation of the pressure curve, the plasticizing pressure shall be on the premise of guarantee the products quality is lower, the better, the specific values are vary with the varieties of the plastic, but usually rarely more than 20 kg/cm2.

2. Injection pressure: in the current production, almost all the injection pressure of injection machine are in piston or screw at the top of the plastic

On the pressure (by oil pressure conversion) shall prevail. Injection pressure in injection molding, the role of is, to overcome the flow resistance of plastic flowing from cylinder cavity, given the rate of molten material molding and compaction of molten material.

CNMOULDING shows how internet can be used to deliver custom mold manufacturer service around the world

CNMOULDING offers plastic molding services for various industries, such as automotive, electronics, home appliances and others around the world using the internet.

China based CNMOULDING believes in using the latest technologies to develop and deliver plastic molds to their industrial clients across the world. The company now uses the internet to build custom molds as per client specifications and reduces the time and cost of designing and engineering molds.

Offering their efficient plastic injection molding service through the internet, CNMOULDING allows customers to send drawings via email. Based on the drawing, they provide quotation for the molding project within twenty-four hours, and the workers of CNMOULDING provide the mold drawing for approval after receiving the Purchase Order from the customer. Once the drawing is approved by the customer, they start manufacturing the mold and send it for the customer's approval again. When the customer approves the sample mold and makes the payment, the production of mold is started. Thereafter, the mold is shipped to the customer.

The spokesperson of the company reveals that their CNMOULDING Mould development and delivery process has been liked by several customers around the world. The internet based process is much faster and helps deliver the product as per the customer's specification. With a strict drawing and sample approval process, the product precisely meets the customer requirements. Moreover, they have a worldwide product delivery mechanism to ship products anywhere in the world.

CNMOULDING maintains a systematic and transparent PO procedure that allows customers to put a control on the product quality, cost and the production cycle. The faster is the approval process, the quicker will be the design and development of the plastic mold. The company has a vast experience in the injection molding and designing and engineering of molds for a number of industries. This is the reason why an industrial client can rely on their production technology and the product quality.

Using the internet, CNMOULDING intends to offer convenience and a simple way of getting custom molds for industries around the world.

we are also offer Dies casting and blister mold