Troubleshooting for PC plastic molded parts

 

Focus on Polycarbonate Project success

We are very honored, for a Polycarbonate molded parts project between China and US injection mold company. We become the winner.

There is an American medical company needs 1 set of high precision injection molding part, the part we are going to mold is made in PC raw resin, also called Polycarbonate. Although the transparent plastics piece is our strength, in the actual production process, some problems. Our experts cost time and solve it finally, it should be we can learn and share.

Here’s a simple idea about the injection mold for PC medical products.

Deep Injection Molding Manufacturing Expertise

As you can see the transparent body is a hook surface.  The product surface needs to be transparent and no rod traces and dirty marks. We need to ensure that the plastic products will not stick in the side of the cavity during the injection molding process. So it is necessary to use a slider block structure. Because the customer needs all the wall thickness must be uniform, then the light reflection is the same. Look at the pictures and videos can know, for an elliptic shape, the problem is difficult to solve.

 

Another problem is the bubble inside, the product safety reason, customer have to design and make the wall thickness reaches 5 MM, PC accessories will have some bubbles, from the picture you are hard to find, but the actual existence, made a bubble in the PC material parts get cooling and sealing the door quickly,  there are some defects on the surface is easy to produce because of big thickness, to do the right thing, there are a few things you might want to check if the resin completely drying, a suitable mold temperature, injection speed, using multi-point hot runner feeding, etc. here is the final approved sample to see the clean off, there is no bubble at all!

 

“INCREASE YOUR COMPANY PROFIT WITHOUT SACRIFICING QUALITY “

Trusty Tooling & Mold Making, China Supplier– CNMOULDING.COM

Mold making in China is generally much more affordable than in the West .Cnmoulding.com will devise the appropriate tool and mold-making strategy for you.

China plastic injection molding and injection moulds will save your company 50% to 70% of the cost of U.S. Manufactured molds and we will produce them in half the time it takes to produce the same mold in the U.S.

Manufacture your injection molded products and injection molding with us in China. Send us your 3D solid model CAD drawings or sample or even only your idea. And we will provide you with the absolute lowest price for injection molds as well as your injection molded products with quality standards meeting or exceeding your expectations.

New energy vehicles put forward new requirements for plastics

 

New energy vehicles put forward new requirements for plastics

With the rapid development of the automotive industry, especially the rapid development of new energy vehicles (including hybrid, pure electric, and hydrogen energy). In recent years, the automotive industry has had a demand for lightweight, integrated, miniaturized, and electrified auto parts Also increasing day by day.

Plastic is an indispensable material in the automotive field, and its process and performance requirements are increasingly becoming everyone’s attention. At the same time, higher requirements are also placed on the R&D capabilities and rapid response capabilities of material suppliers.

Miniaturization of turbocharged engines requires high-temperature resistance of plastic materials

The latest development trend of internal combustion engines is miniaturization and intake supercharging (that is, turbocharged high). The huge benefits brought by these two technologies are a significant reduction in fuel consumption. An increase in engine power, and a reduction in overall engine mass. For example, The two-piece structure design of the previous engine intake manifold has been changed to an intake manifold with an integrated intercooler.

This design puts forward higher requirements for the high-temperature resistance and high strength of the material. It needs to withstand high temperatures of 190°C and 230°C for a long time and has excellent strength.

Electrification requires low precipitation and neutrality of plastic materials

As more sensors have been placed in various positions of the vehicle. The integration of electrification continues to improve, and the requirements for materials of this electrified equipment are more stringent than before. Such as low precipitation (not to block the oil circuit of the capillary structure), Electrically neutral (not to cause a short circuit in the circuit), and materials need to meet the requirements of relevant laws and regulations (not to contain prohibited substances), etc.

Polyamide (nylon) materials are widely used in the automotive industry for their excellent mechanical strength and long-term heat resistance. Its heat resistance is related to the heat stabilizer. Common heat-resistant stabilizers include metal salts (such as copper iodide/copper halide, metal stearate, etc.) and aromatic amines (such as aniline substances, etc.). With the increasing awareness of environmental protection, some of these heat-resistant stabilizers have been banned by relevant regulations due to their side effects. For example, the latest EU regulations strictly control N, N’-diphenyl-p-phenylenediamine (DPPD) substances.

New energy vehicle requirements for flame retardant properties of plastic materials

With the rapid development of new energy vehicles (including hybrid, pure electric, and hydrogen energy), related standards for parts and materials in this field are also rapidly refined. For example, requirements for different flame retardant systems, flame retardant systems Cover roughly 5 types, namely. Halogen flame retardant, nitrogen flame retardant, inorganic flame retardant, phosphorus flame retardant. And nitrogen-phosphorus synergistic flame retardant. Among them, the flame retardant mechanism is divided into gas phase flame retardant and corrosive” Carbonized” flame retardant. Such as red phosphorus, inorganic flame retardant, etc.

Different flame-retardant systems have different flame-retardant effects. At the same time have obvious changes in the physical properties of the material (such as density, rigidity, and toughness). So how choosing a flame-retardant system to match the flame-retardant effect and mechanical strength requirements of the components is a very complicated problem that must be solved.

New energy vehicle requirements for thermal aging stability of materials

In the high-voltage parts of new energy vehicles. According to regulatory requirements, bright orange materials are required to mark the relevant parts as high-voltage areas. The components in the high-voltage area tend to continue to heat up after the current is connected. Therefore, most vehicle manufacturers also put forward related thermal aging stability requirements for orange materials. For example, after 90℃+1000h thermal aging, the color change of RAL2003 shall not exceed Darker oranges such as RAL2008 and RAL2009.

In the future automotive industry, lightweight and weight reduction, electrification, high transmission efficiency, and miniaturization of turbocharged engines will surely become a whole. And become the indicators for the development and verification of most highly integrated auto parts. . Material manufacturers also need to actively respond to the market and improve material performance to meet the new requirements of the automotive industry.

Overview of China Auto Mould

 

Overview of China Auto Mould

China Auto Mould[/caption]

 

The rapid development of China's automobile industry has brought a broad development space for domestic automobile molds. In addition, due to cost and market factors. The focus of mold manufacturing in developed countries has gradually shifted to developing countries represented by China. Comprehensive factors at home and abroad have promoted the rapid development of the domestic automotive mold industry. And many emerging automotive mold companies have emerged. According to statistics, injection molds account for about 37%. China has become a veritable automobile mold manufacturing country.

 

China’s automotive mold production capacity is extremely advantageous in the world. However, due to the slow technological improvement of domestic high-end automotive mold companies, technical innovation capabilities. And insufficient capabilities in R&D and application of new mold technologies. The development capabilities of domestic high-end molds are not yet complete. To meet the supporting needs of the domestic automobile industry. A large part of high-end automobile molds still needs to be imported. Therefore, the domestic automobile mold industry needs to make up for this shortcoming as soon as possible to make up for a major shortcoming of my country's automobile mold industry.

 

As China's top ten industries for revitalization

China Auto Mould

China's automobile industry has been supported by national policies, coupled with the promotion of autos to the countryside. And China's major auto companies have increased their production, reaching 40 million vehicles in 2020, maintaining the world's first position in production and sales. It is understood that about 1,500 molds are needed to manufacture an ordinary car, among which are close to 1,000 stamping molds and more than 500 interior trim injection molds. Affected by the rapid development of China's auto industry. China's auto mold industry has shown rapid growth and its market capacity has continued to expand.

 

With the gradual increase of China's automobile production year by year. Domestic and foreign automobile mold companies have shown their talents in the Chinese automobile market. Meeting the hot domestic demand and export demand to a certain extent. And at the same time. It has created a new generation in my country's automobile mold industry. Good opportunity. It can be seen that the prospects of China's automobile mold industry are very broad.

 

Scientific management and informatization are the development direction of mold enterprises

 

Another important aspect of the development of automobile mold technology is scientific and information management. Scientific management has enabled mold companies to continue to develop in the direction of Just-in-Time Manufacturing and Lean Production. Enterprise management is more precise, production efficiency is greatly improved, and ineffective institutions, links, and personnel are continuously streamlined. With the progress of modern management techniques. Many advanced information management tools, including enterprise resource management systems (ERP), customer relationship management (CRM), supply chain management (SCM), project management (PM), etc., are used in mold companies It is widely used.

 

Refined manufacturing of molds is an inevitable trend

 

The so-called refined manufacturing of molds refers to the development process and manufacturing results of molds. It is specifically manifested in the rationalization of the stamping process and mold structure design. High precision of mold processing, high reliability of mold products, and strict technical management. Sex. Refined mold manufacturing is actually not a single technology, the second is a comprehensive reflection of design, processing, and management technology. The realization of refined mold manufacturing not only depends on technical excellence but also on strict management.

 

China is the world's largest country in automobile production and sales. The number of automobiles is also expected to be the largest in the world, but it has never been able to produce its own high-end cars. This has a lot to do with the lagging development of the automobile mold industry. Which is known as the "mother of the automobile industry". Auto mold refers to the mold used in the automotive field, known as the "mother of the automobile industry". More than 90% of the parts in automobile production need to be formed by molds, and automobile body molds, extensive huge and medium-sized panel molds. Are used for body manufacturing. An important part of technology is also a key link in the formation of autonomous vehicle development capabilities.

Automobile mold products include automobile cover molds, tire molds, interior, and exterior plastic parts molds, automobile lamp molds, automobile bumper molds, automobile dashboard molds, etc.