what is plastic injection moulding?

21/11/2022
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Injection mold is a tool to produce plastic parts which can ensure full structure and exact dimension. Injection molding is a kind of method to mass produce plastic parts with complicated shape and structure: Fill the melting plastic into mold chamber by high pressure of injection machine, and then can get the harden product after cooling.

According to molding characteristics, injection mold can be divided into Thermosetting plastic mold and thermoplastic plastic mold. And according to molding process, injection mold can be divided into transmission mold, blowing mold, casting mold, hot forming mold, hot pressing mold (compression mold), injection mold, etc. The hot pressing mold can be divided into overflow type, semi overflow type and non-overflow type by overflow mode, and the injection mold can be divided into cold runner mold and hot runner mold by gating system; According to the loading and unloading mode, it can be divided into mobile type and fixed type.
Injection mold
Injection mold for plastic parts
Injection Mold is customized and it will change according to plastic parts' shape & structure and injection machine's type, but the basic structure will keep the same. Usually It is consisted of injection system, temperature controlling system, molding chamber and accessories. The injection system and molding chamber touches plastic directly, and they will change according to the parts, they are the most complicated and changeable. high precision and high polished area in one mold.

Injection mold is consisted of fixed side and moving side. The moving side will be fixed on the moving plate of injection machine while the fixed size on the fixing plate. The two side close together for plastic forming, and open to take out production. To shorten the mold making time, usually it will use standard mold base.

Applications Area:
Injection mold is a very important equipment and tool to produce different kinds industrial product. With the fast developing of Plastic Industry, and the plastic parts widely used in aviation,aerospace, electronic , mechanics, ship and auto industrial, injection mold’s standard keeps raising, traditional mold design method is not enough for the high request now. Comparing with traditional mold design, CAE has big advantage to increase production speed and reduce mold cost and even the work.
injection mould Applications

CNC is the most used processing in mold making, wire cutting and EDM are also very common.
Wire Cutting is mainly used to process vertical area of mold, for example cavity and core, insert and slider, electrode for EDM. For some high hardness mold parts, sharp edge area, big depth or groove area will use EDM. Lathe mainly used to make pin parts or round core and cavity, like bottle, pot and axis. CNC drilling is also very important to increase processing accuracy and shorten processing time.

Injection mold is widely used in modern manufacturing, so mold industry is a very important and valuable part of a country's High-Tech industry. Using CAD/CAE/CAM to increase mold making standard and improve the quality and precision will be the trend of development of mold making technology.

Two Color Mold:
1. Two color mold is a molding method to inject two different color in one mold. It make the plastic parts have a better appearance with two color in different pattern. 
2. The Pic shows the theory of two-color molding. It will have two injection gate and switch. During production, use switch to control the sequence and proportion of two injection, and fill the plastic into mold, then we can get the final product with different color.two colar mould