Elbow injection molding

 What is elbow injection molding?

Most of you probably have heard of the option “Core Pull” with Injection Molding Machines. Simply put, the core pull allows a cavity to be put in the product parallel to the clamp. ... The important component is that the product being create must need a place devoid of plastic that cannot be accommodated by the mold itself.

 

 

Molds, various molds, and tools used in industrial production to obtain required parts by injection molding, blow molding, extrusion, die-casting or forging molding, smelting, stamping, and other methods. In short, a mold is a tool used to make molded objects. This tool is composed of various parts, and different molds are composed of different parts. It mainly realizes the processing of the shape of the article by changing the physical state of the formed material. At present, the injection mold has become a very common mold used in the industrial production process. The slider is a mold component that can slide perpendicular to the mold opening direction or at a certain angle to the mold opening direction during the mold opening action. For some Parts with undercuts are often molded normally only by adopting a slider structure. But when the molded product is an arc-shaped hollow product, arc core-pulling molding is required

 

The core-pulling system is used to handle the position where the product cannot be demolded on the parting surface. It is a special structure of the mold.

 

Core-pulling is a definition: a mechanism that ensures the smooth demolding of the product, also called a slider.

 

For example, there is a hole on the side of a plastic part. After the mold is opened, if the core of the hole is not removed, the product cannot be ejected.

 

At this time, the structure of the mold must adopt the structure of the slider, the core of the hole is made movable, and the inclined guidepost is used to cooperate with the fixed mold, and the the slider moves with the mold opening or closing. This kind of movement is called core pulling.

 

The core-pulling mechanism is a common mechanism in the mold. The core-pulling mechanism usually moves together with the upper mold and uses positioning or guiding mechanisms such as guide blocks to ensure the accuracy of the core-pulling. In order to simplify the mold structure and reduce the mold space.

 

The common core-pulling mechanism is mostly driven by a cylinder to complete the core-pulling. There are various structures such as positive core-pulling and reverse core-pulling. The reverse core-pulling structure takes up less space than the positive core-pulling structure. There are fewer restrictions on mold space.

 

However, the structure of the reverse core pulling is relatively complicated to set up, the process part is time-consuming, and the structure is complicated, the production and installation is time-consuming and labor-intensive, and too many parts affect the accuracy of the mold.

 

The positive core-pulling adopts an oil cylinder to directly drive the pulling structure, which is simple in structure, but the oil cylinder requires a certain installation control and driving stroke, which causes the increase of the mold and the cost of the mold, and the use of the mold increases the site requirements.

pet car exhaust unit

 

This is a product we made for our customers in Australia. It's an exhaust unit for pet cars. Unlike the imitations on the market, we are the only factory designated by the customer to produce. the genuine products for the original manufacturers.

 

 

 

The material of this product is ABS. ABS plastic has the common properties of three components. A makes it resistant to chemical corrosion and heat and has certain surface hardness; B makes it highly elastic and ductile; S makes it has the processing and forming characteristics of thermoplastic and improves the electrical properties. Therefore, ABS plastic is a kind of "tough, hard, and rigid" material with easy access to raw materials, good comprehensive performance, low price, and wide application. ABS plastic has been widely used in machinery, electrical, textile, automobile, aircraft, ship, and other manufacturing industries and chemical industries.

 

 

In the process of production, there is no addition of any returned material, absolute environmental protection, no addition, no formaldehyde and other materials harmful to human health

 

  

 

We have done static and static balance test for every ex-factory product to ensure that the product meets the design requirements, stable exhaust, 10 years to ensure quality, all stainless steel precision bearings

How are the meltblown fabrics for masks made?

What is a precision injection molding

What is a precision injection molding

Precision injection molding generally refers to a process that requires high accuracy and surface quality of molded products. Some people also believe that precision injection molding refers to an injection molding process that has a dimensional accuracy of 0.01 to 0.001 mm. With the rapid development of medical, communications, automotive and other industries, people's requirements for the accuracy and height of plastic products are increasing day by day. Traditional plastic molding processes have been difficult to meet the current high standards. At the same time, injection molding is one of the most important plastic molding methods. First, as a result, precision injection molding technology is receiving more and more attention from people. Therefore, precision injection molding technology continues to advance, and new technologies continue to emerge.

Precision injection molding requires that the product not only has high dimensional accuracy, minimal warping deformation, excellent transfer characteristics, but also excellent optical performance, etc., so it has an excellent performance on injection molding machines, injection molds, molding processes, and raw materials. And formula are always special requirements, many factors affect precision injection molding.

What are the factors that affect precision injection molding?

Generally, PS, ABS, AS, PMMA, PC, PPO, PSU can be used to form products with level 3 and 4 accuracies; PA series can be used to form products with level 4 accuracy; and POM, PP, PE, TPE, etc. are not suitable for forming level 4 or higher Precision products.

In addition, due to the low shrinkage and high dimensional stability of inorganic-filled or glass-reinforced plastics, they are often used to form precision products. Process characteristics of precision injection molding are mainly high injection pressure, fast injection speed, and precise temperature control.

(1) High injection pressure the test proves that for different plastic varieties, shapes, and sizes, the pressure required for precision injection molding should be 180-250MPa (the injection pressure used for ordinary injection molding is generally 40-200MPa), in some special cases, the requirements are higher. The highest has reached about 450MPa.

(2) Fast injection speed The size of the injection speed obviously affects the size of the product, and more importantly, it can reduce the dimensional tolerance of the product. In order to improve the accuracy of injection molded parts, especially for the molding of products with complex shapes, variable-speed injection must be developed, that is, the injection speed is changed, and the change rule is determined by the structural shape of the part and the properties of the plastic.

(3) Temperature control must be precise. The temperature has a great influence on the molding quality of the product and is one of the three major process conditions for injection molding. For precision injection molding, there are both temperature problems and temperature control accuracy issues. In the process of precision injection molding, if the temperature is not accurately controlled, the fluidity of the plastic melt and the molding performance and shrinkage of the product will not be stable, so the accuracy of the product cannot be guaranteed.

From this perspective, when precision injection molding is used, the temperature range must be strictly controlled for both the barrel and the nozzle and the injection mold.

For example, during precision injection molding, PID controllers are used for the temperature at the barrel and nozzle, and the temperature range is controlled within 1 ° C. For ordinary injection molding machines, the temperature can reach 20 ° C to 300 ° C. In order to ensure the accuracy of the product during injection molding production, in addition to strictly controlling the temperature of the barrel, nozzle and mold, attention must also be paid to the impact of the ambient temperature on the accuracy of the product after demolding.

The Document And Preparation Before Mold Shippment

The Document And Preparation Before Mold Shippment

As we know, we as plastic injection mold manufacturer should make sure the mold meet customer’s requirement and the quality meet the highest level, At the same time, it is convenient for customers to use.so preparation before mold shippment，checking procedure should be injection moulding company followed as below. make sure all document needed is all packed in the shipping box
1, 2D mold assembly drawing with hard copy
2, 2D part drawing with hard copy
3, all the 2D drawing and 3D part drawing with PC copy(Buring in CD disk)
4, Hot runner drawing if have
5, short shot photos and 2 prototypes   China cycle auto-injection video burn in the CD
6, all the electrodes for mold in case modification in the customer side
7, 1 shorts sample for the last trial
8, 1 copy of injection molding parameter
9, steel certificate for core and cavity
10, the dimension measurement report for the last samples
11, The hardness plastic moulding companies treatment certificate for cor and cavity steel
12, one copy nitriding certificate
13, measurement report for mold steels.

Trade war - China's will to defend its interests is strong

On August 24th the USA announced that it would raise tariffs on some $550 billion of Chinese imports. A spokesman for the ministry of commerce said China was firmly opposed to the move. Such unilateral and bullying trade protectionism and extreme pressure actions run counter to the consensus reached by the heads of state of China and the United States, violate the principles of mutual respect, equality, and mutual benefit, and seriously undermine the multilateral trading system and normal international trade order. China strongly urges the USA not to misjudge the situation, underestimate the determination of the Chinese people and immediately stop its wrong practices, or the USA will bear all the consequences. (see page 04 for related report)

A sharp fall in the USA stock market was imminent, but the scale and intensity of the trade friction were again escalated, regardless of the consequences. The dow jones industrial average plunged more than 600 points on Wednesday as all three major U.S. stock indexes suffered heavy losses due to trade frictions between China and the United States. Earlier, the USA government announced a 10 percent tariff on us $300bn worth of imports from China. U.S. stocks plunged Tuesday after China announced a trade response and the U.S. federal reserve's decision to cut interest rates. After the American stock market crash, some people in the United States are still irrationally and immoderately brandishing the tariff stick again, which shows that the interests of the American people have been regarded as nothing by some politicians.

The USA side has repeatedly raised tariffs on its imports from China. This time, it brazenly announced that it will raise tariffs on all us $550 billion of Chinese imports to the USA. This action violates WTO rules and runs counter to the consensus reached by the two heads of state at the meeting in Argentina and the meeting in Osaka, and seriously infringes upon China's legitimate rights and interests. The further some in the United States go down the slippery slope of bullying for profit, the stronger the backlash will be.

China's will to safeguard its core national interests and the fundamental interests of its people is indestructible. Since may this year, the USA has been escalating trade frictions with China. First, it announced that it would raise the tariff rate on us $200 billion worth of imports from China from 10% to 25%. China recently decided to impose tariffs on about $75 billion of imports from the United States and resume tariffs on cars and plastic parts from the United States. China's countermeasures are precise and effective. They are a response to the USA's unilateralism and trade protectionism, and a strong counterattack to safeguard the interests of the country and its people.

Cooperation is the only correct choice to solve the economic and trade issues between China and the United States. This time, the United States has once again escalated economic and trade frictions and carried out "extreme pressure" in a desperate manner. China strongly opposes us trade bullying and will never make concessions on major issues of principle. For more than a year, the USA's strategic intention to stir up frictions aimed at curbing China's development has been exposed. The so-called "charges" of trade imbalance, forced technology transfer, theft of intellectual property rights and currency manipulation are all the means and excuses used by some us politicians to suppress China. Development is the theme of human civilization. China's development benefits the world. China will never settle differences at the expense of its right to development. In the face of unilateral provocation and escalation of economic and trade frictions by some in the USA China has the ability to resolutely stand by them to the end.

Any extreme pressure is of no use to China. In the face of blackmail by some us politicians, China has the confidence and confidence to resolutely fight back. In the face of complex and severe domestic and international situations, the Chinese economy has got off to a good start this year, with major indicators remaining within a reasonable range. Domestic demand and consumption are growing strongly, innovation is growing rapidly, and macro-control measures are sufficient. All these favorable conditions will ensure that the Chinese economy will continue to forge ahead in spite of wind and rain.

No one wins in a trade war. While countering trade bullying, China will also take into account both domestic and external factors, actively expand opening-up, reduce tariffs on its own initiative, increase imports from other countries, and minimize the impact on China's domestic production and people's living needs. China hopes to build a balanced, inclusive and win-win new economic and trade order between China and the United States. At the same time, China's will to defend its own interests is unshakable. To develop a resilient Chinese economy, we will resolutely uphold and improve the multilateral trading system and work together for mutual benefit and win-win results.

New purchasing strategies in the global economic slowdown

What will happen to the world economy in 2019? A large number of uncertain factors have left the world economy in a fog, and overall, anxiety and optimism coexist. Basically, the global economy will slow down in 2019. Since the beginning of 2018, emerging market economies have suffered from capital outflows, weakening the economies of emerging countries, leading to currency depreciation, rising inflation, and reduced household purchasing power. In the second half of the year, some emerging markets broke out in a currency crisis, geopolitical situations were once again tense, trade frictions escalated, and the risk of a resurgence of the crisis was reshaping new growth patterns through different forms.

In the global economic downturn in 2019, companies have become increasingly difficult to survive. Especially for large and medium-sized enterprises, faced with high labor costs, rental pressures, and rising raw material prices. How to find the right supplier, reduce the procurement cost and ensure the quality?

1, how to reduce procurement costs

Currently, companies are in a highly competitive and rapidly changing environment, and competition has caused the industry's average profit to fall. It is increasingly difficult for companies to establish or maintain sustainable competitive advantage through sales and production; there is still room for development in the procurement field that has been neglected for many years.

Effectively reducing the overall cost of procurement and integrating supplier capabilities through strategic procurement will become an important source for leading companies to continuously reduce procurement costs and enhance their competitive advantage. Therefore, the focus of procurement is on how to choose suppliers, especially the supplier price comparison that pays more attention to the transaction process. Through the competition of suppliers, choose the lower price as the partner. Perhaps the blind pursuit of low prices may lead to a decline in quality. If you cooperate with CN-MOULDING, you don't have to worry about this problem. CN-MOULDING is a typical small and medium-sized enterprise in China. The company is not too large. It is a real manufacturing enterprise. CN-MOULDING can supply customers directly, eliminating all the difference in the middle and reducing costs. The company coordinates Shanghai has geographical advantages, convenient import and export, familiar with business operations, saving time and cost.

2, how to choose low-cost high-quality suppliers

Taking CN-MOULDING as an example, an injection mold company was established in 1997 and has been a small and medium-sized private enterprise for 20 years. Since its establishment, it has been focusing on mold manufacturing and injection molding. Since 2001, it has been engaged in the foreign trade business. It has a large customer base and recognition in Europe and America. With its exquisite technology and rich experience, it has been provided to customers in more than ten countries and regions. solution:
1. Help customers to properly adjust the wall thickness of the product and find the best balance between product quality and production cost.
2, predicting the appearance of weld defects, gas marks, trapped gas, and other defects,
3, predict and control on the mold. Predict product distortion,
4, Help customers to improve the product assembly structure, the front design to avoid deformation.
5, rationally arrange the glue and cooling system to achieve the best process and the most economical investment.
6, to provide optimized production process parameters to help customers solve the problem of product injection production.

The following mold is produced by CN-MOULDING for American customers. It is bulky, thin wall, complex in structure, high in precision, and more difficult to demold the gas roof unit. At that time, CN-MOULDING was not the first choice partner of customers, but more inclined to have large companies on a large scale. In the eyes of customers, big companies mean high quality, high standard, on-time delivery, after-sales service and so on. But ignoring an important issue is the cost of procurement, the quality of the mold is excellent, is the price equally satisfactory?

After the customer revealed that the original mold price was 680,000 RMB, far exceeding their budget. Then the friends around me came to the Shanghai CN-MOULDING company to visit and inspect and offered the quotation on the spot, the total price was 476,000 RMB. They said that it is hard to believe, after all, the price is only 70% of the previous company. It is also doubtful that such a low price can really be achieved? Can you really guarantee the quality of the mold? Is the after-sales service guaranteed? Wait for a series of questions. CN-MOULDING has shown that the larger and more difficult mold cases that have been done before have been shown to customers. Although CN-MOULDING is a small and medium-sized enterprise, it has 20 years of experience in mold manufacturing, and the cooperative companies have many world-class companies. The business has also spread to more than ten countries and regions. Numerous successful cooperation cases have enabled customers to have confidence that CN-MOULDING is a professional, experienced and trustworthy mold manufacturing company.

https://www.youtube.com/watch?v=b3lB0wqWYB0

China's small businesses are fundamental to the vitality of production

There are tens of thousands of small and medium-sized enterprises in China. SMEs are the most dynamic and innovative enterprise groups in China. At the same time, SMEs provide more than 50% of tax revenue, create more than 60% of GDP, and complete more than 70% of invention patents, providing 80%. More than % of urban jobs. SMEs have a pivotal position and have unique advantages. With reasonable prices, rich experience and reliable quality, they are gradually replacing the original large enterprises.

CN-MOULDING is a small and medium-sized enterprise in China that is dynamic, innovative, and professional, and directly supplied to foreign countries. In 2015, we obtained ISO9001:2000 quality certification! With 20 years of integrity, 20 years of experience, and 20 years of quality assurance and after-sales protection.