Automotive Plastic Mould

 As we know, the auto business develops very quickly in the past ten years, more and more newest go to the market. lots of automotive components are made from plastic. This means it needs a large number of Automotive Plastic Mould made.

CNMOULDING is specialized in various types of auto bumpers molds and their auxiliary parts such as grilles. CNMOULDING produces bumper molds for international automotive OEM plastic moulding china brands and doing well in bumper molding. One of the particular features of CNMOULDING is short development time, it will help our customers launch the product in the market.
We are a company that specializes in automotive plastic mould.

As a new material for auto parts, plastic parts can reduce the weight of cars and is energy-saving. Thus they are widely used in the auto industry. Plastic material gives auto manufacturers more flexibility in car design, i.e.: inner decoration spare parts, panels, door trims, ABS braking system, bumpers, triangles, spoiler, etc. Plastic injection molding china Our company has certified by ISO9001, along with a professional design team, high-performance equipment. We have been a cooperative partner of many car manufacturers in both China and overseas. our company is capable of providing integral design, structural design, auto mold development, product injection. Including panel, door trims, air condition, and bumper analysis for Automotive Parts Molding.

Product design and mold flow analysis

In the process of product design, mold flow analysis software is used to work out the best point of the flow. At the same time, to minimize the cooling effect, cycle time, injection molding china warping problems of the product, thus avoiding deformation, welding mark, shrinkage problem. Every important assembling part will be checked by jigs and gauges to make sure that all products fit well in their set.

Electric car Plastic Mould processing technology

Measuring is of high importance in auto molds, which affects the assembling and fitting effects of all auto parts. The five-axis CNC  machine can speed up the feed process, shorten the manufacturing cycle, optimize the tooling system and simplify processing cycle time and guarantee the precision of the auto mold.

Auto parts injection technology

In the process of injection, material property, clamping tonnage, injection pressure, and cooling system should be taken into serious consideration. Auxiliary equipment such as a water chiller, mold temperature controller machine should be used when necessary, thus shortening the cooling time and improving productivity. Spare parts should be put carefully into a special appliance in order to preserve it well.
Auto parts Mould specific processing:
1. As per sample or 3D drawing design the mould.
2. Purchasing steel.
3. CNC machining, Drill, Heat treatment
4. High-speed CNC machine
5. Assembling and fitting
6. Mirror polish
7. The first mold test
8. Delivery

The Process Of China Mould Maker

 

The Process Of China Mould Maker:

1、China Mould maker design control
2、China Mold Maker steel certificated
3、China mould makers steel hardness inspection
4、China mould company electrodes inspection
5、China Mould manufacturer core and cavity steel dimension inspection
6、China mold makers  pre-assembly inspection
7、China mould making  trial report and samples inspection
8、China mold making pre-shipment final inspection
9、export mould package inspection

The injection mould should produce quality parts at the correct cycle time without interruptions due to ejection difficulties. There should be no need for a molder to spend time, energy, or money troubleshooting and repairing
a mold. Employees should be free to work on the more important money-making tasks.

Part design, part material selection, injection mould design, processing, and injection mold making techniques
must all be taken into consideration when making an injection mould that will be reliable. That's why constant
communication between injection molders and injection mold makers is critical to success.

Cnmoulding is reliable china injection mold factory

China Injection Mold name:  Cover

China Injection Mold Type: full hardened export mold/plastic injection mold / 2 plate mold

Description of injection molds: Mold making is used in the German precision medical industry, we make the
mould in our mould making factory then test it in our china plastic injection molding company. And injection
molded plastics products maker in China. Manufactures and exports quality OEM china plastic injection molding manufacturing and plastic mould making hot Runner Options: We have experience with the following China-Based hot runner providers: Husky, Mold Master, Yudo, or another hot runner that we can buy from china.

Size & Types of molds

From a press size of 30 tons – 2,500 tons, we can build it in-house. 3 plate, rubber over molds, metal inserted
molds, metal over molds, laminated lens molds, reflector molds, high precision gear molds, tandem molds,
multiple slide molds, multi-stage ejection molds, multi-cavity molds. Molds with LARGE numberS of changeable
inserts.

CN-moulding is a professional china injection mould manufacturer which is engaged in plastic injection

our company focuses on mold making and stamping die making for over 20 years. With advanced in-house
machines and professional workers, we can achieve your satisfaction by supplying you with both quality high precision injection mold ((+/- 0.02mm) and large injection mold (2200mm),.Our injection molds are widely used in toys and games, electrical appliances, automotive, industrial parts, and other molding goods. We usually exported our molds to Europe, America, Asia, and other regions. High quality, reasonable price, and on-time delivery have earned us a good reputation in our customers.

What is medical injection moulding?

 

What is medical injection molding?

Injection molding is a widely used manufacturing process in the medical industry, offering numerous advantages for a variety of applications. Medical-grade plastics injection molding is used for medical devices, components, laboratory and facility equipment, and more.

When it comes to health and quality of life: with its injection moulding machines, CNMOULDING will always live up to the specific requirements of the sensitive medical industry. We offer utmost safety, cleanroom-compatible production, precision, and full documentation and traceability in the manufacturing process.

medical injection molding

medical injection molding

Medical Plastic Injection Moulding Benefits

Since medical device plastics provide increased versatility and can be combined with metal to create enhanced medical product attributes, medical-grade plastics have become the preferred material for numerous types of electronic medical devices. Some of the advantages that medical injection molding companies can provide include:

Improved ergonomics
Reduced weight
Increased functionality
Lower cost
The decreased burden of sterilization

Why Plastic Injection Molding is Important in the Medical Field

Since its inception, the use of plastics within modern medicine has steadily increased. Medical devices that are manufactured from injection molded plastic have contributed to a reduction in medical costs, infectious disease, and pain management. High-tech polymers are used within medical device prototype development and are commonly used to create improved artificial limbs and devices that reduce the risk of infection. Medical plastic injection molding directly leads to increased patient safety and the ability to save more lives.

Medical Device Plastic Injection Molding Applications

Our medical insert molding processes can create housings for medical devices including:

Medical Enclosures
Medical Knobs
Surgical instruments
Tubes
Dental instruments
Medical equipment components

Manufacturing capabilities in the medical field

• Wide range of medical materials
  Hundreds of plastic, metal, and elastomer materials such as PEEK, PEI (Ultem), PPSU, polycarbonate (PC), liquid silicone rubber (LSR), Ultem, TPEs, Radel, PSU, Delrin, Lexan, Pebax, ABS, etc.
• Machinable size
  From miniature to 2400 square centimeters (based on the processing size of our standard mold), in addition, we will also provide manufacturing services for larger size products according to customer needs
• Mold cavity tolerance
  +/-0.01mm when processing molds, increase +/-0.05mm per centimeter when calculating shrinkage
  • Consistency of parts
  Less than +/-0.1mm
• Mold type
  Customers can choose the most suitable mold core material based on the estimated sales of the product
• Optimize the supply chain
  Save resources and reduce manufacturing costs
• Machine equipment resources
  Single-color and two-color injection molding machines with different tonnages

How does CNMOULDING help the medical industry upgrade?

Quotation within 24 hours
CNMOULDING’s excellent structural engineering team and mature formwork solutions can guarantee a quotation within 24 hours

30% cost savings
Through standardized mold bases and the control of size, materials, bulk purchases, streamlined production, and machine efficiency, it can save customers 30% of manufacturing costs on average

50% shorter lead time
Save the mold base processing time, meanwhile, the mold production cycle is short, and some mold parts are standardized, which is 30% faster than the average delivery time of traditional suppliers.

For your free quote and design-for-manufacturability feedback, please upload your CAD file. We want to earn your business. If you get a lower injection molding quote, send it to us and we will try to beat it.

What is Injection Molding process defects?

 Injection molding is a complex manufacturing process that can produce high-quality plastic parts. However, there are several defects that can occur during the injection molding process. Here are some common injection molding process defects:

 

Warping:

This occurs when the plastic part cools and contracts unevenly, causing it to warp or twist. Warping can be caused by uneven cooling, improper mold design, or incorrect material selection.

Sink marks:

These are depressions or indentations that appear on the surface of a plastic part. Sink marks are caused by uneven cooling, thick areas of the part, or insufficient packing pressure.

Flash:

Flash is excess plastic material that protrudes from the parting line of the mold. It is caused by excessive injection pressure, poor mold alignment, or worn or damaged molds.

Short shots:

Short shots occur when the plastic material does not completely fill the mold cavity, leaving the part incomplete or with missing sections. Short shots can be caused by insufficient injection pressure, improper material selection, or inadequate venting.

Burn marks:

The burn marks are dark or discolored areas on the surface of the part caused by overheating of the plastic material. Burn marks can be caused by excessive injection speed or pressure, inadequate cooling, or poor venting.

Voids:

Voids are empty spaces or air pockets within the plastic part. Voids can be caused by inadequate injection pressure, poor mold design, or insufficient cooling.

Overall, injection molding process defects can be caused by a variety of factors and can be challenging to prevent. Careful attention to mold design, material selection, and process parameters can help to minimize these defects and produce high-quality plastic parts.

How to solve the problem of surface depression

 How to solve the problem of surface depression

surface depression

The basic cause of surface depression: From the plastic point of view. When the plastic cools and shrinks, insufficient shrinkage can cause depressions or voids on the outer surface of the article.  The location of the depression is different, and the cause and solution of the defect will be different. 

1. When the depression occurs at the last cooled position of the thick-walled product, or at a location far from the gate.  Analysis of the causes: usually the typical thick wall and the surface depression or cavity far from the gate. Usually, due to the increase of the effective viscosity. The pressure loss is increased, resulting in insufficient cavity pressure, resulting in insufficient feeding pressure.  Solution: increase the feeding pressure and speed up the feeding rate.  

2, When there is a surface depression or hole near the gate  Analysis of the cause:

The depression appears near the gate, usually due to the lack of gate freezing.  There are several reasons that affect the freezing of the gate: it may be caused by a decrease in effective viscosity. In most cases, the gate is not frozen due to an increase in the temperature of the plastic. Too high a mold temperature may affect the freezing of the gate.  Solution: Ensure that the gate freezes by adjusting the mold temperature, plastic temperature, and increasing the dwell time.  

3, Note: holes and bubbles are easily confused. Holes are sometimes misunderstood as bubbles. The bubbles are trapped inside the gas, and the inside of the cavity is a vacuum.

An Injection Mold Testing

 Someone will tell you that a good mold doesn’t need to be tested, and that would cost you extra money, but we’ve been doing this for years. Testing is usually necessary, it will help you to find a lot of questions, we only from the technical point of view of the need to do an injection mold testing.

1.  Real injection mold test products are completely different from prototype making, hardness, shrinkage, flatness are different.
2.  The product assembly after the mold test allows you to understand the product design and assembly of the real problem.
3.  I Will let you know whether the gate and ejector design are reasonable.
4.  I Will let you know whether the design of the cooling system is reasonable.
5. You can know the exhaust condition, slider, oblique roof, gas ejector, spring ejection, and other parts of the operation. Like a car, taking to the streets without a performance test is dangerous.  Every new mold for an accident, the same as a new car on the road.

Mold Testing

Injection mold testing instruction and each step

Mold Testing

Mold Testing

Mold Testing

Mold Testing

• All materials except PE/PP need to be dried before mold test. This is the standard of our mould company.
•  Position the mold on the center hole of the injection molding machine and align it. Set the clamping force at half the rated capacity. In the injection molding process, if burrs occur under injection pressure, the clamping force can be gradually reduced until the burr disappears, and the service life of the Die can be obviously increased by this method.
•  The opening speed, pressure, and position of the mould should be adjusted appropriately. Note that the low-pressure protection is only suitable for the new type of mould, so it is of little use to the old mould, so we usually recommend that the customer mould products should be produced in our company, and some of our peers have great problems with the quality of the mould. So mold making costs are not the cheaper the better. In the first test mode, Die slider, the ejection speed can not be too fast. For a core-pulling mold, the first to determine whether it works well. Otherwise, the Die will be damaged in the wrong circumstances, and even the whole cavity will be damaged.
•  PE or PP materials are usually used to clean the barrel for viscosity and friction, respectively. The material temperature should be kept between 220 ℃ and 240 ℃. The stroke is shortened and a certain back pressure is applied.
•  Condition setting / injection / pressure, speed / time / quantity / position, etc. According to product conditions, injection pressure/injection speed/quantity is set from low to high. The cooling time/injection time should be gradually shortened when the product is formed, to prevent glue and overcharge.
•  Packing pressure, mainly 5~10mm packaging material, must be applied.
•  In the case of a die with a straight hydraulic clamping system, the adequacy of the clamping force must be checked, and in the case of the elbow rod type, the crosshead must be checked to prevent the mould from being pushed backward during the injection process, So as to avoid the mold damage caused by the big burr leak.
• During our cooperation with foreign customers for many years, we learned that the really good quality mold is no release agent, and some products have to do the surface treatment at a later stage, No release agent is allowed.
• The parameters should be adjusted step by step according to the plastic molding product. All the parameters of the test mold should be recorded and prepared for the next test.
•  The products should be stored in bags of different specifications, and the defects and suggestions for improvement should be pointed out. We use the CPK quality control system to complete the whole process of injection molding product quality from beginning to end.
•  Pay attention to mold temperature rise. Mold temperature should be controlled by coolant or oil temperature / water temperature / electric heating tube during multiple mold operations-different mold temperature controls are selected for different materials, For example, hot mold (60 ℃ and above): nylon / PBT / PPM / PPS / PM / PM / PM / PM / PM / PM / P / NORYL and cold mold (60 ℃) PE/PP/PS/AS/ABS/PVC/PU.
•  Some injection mold tests do not require cooling water, and small batch production needs to be used. After the mold is finished, the material in the barrel can be completely injected before stopping the machine. Then, apply the rust inhibitor inside the mold and clean the sundries at the same time.