Main types

1. Rubber injection molding: Rubber injection molding is a production method that directly injects rubber material from the barrel into the mold for vulcanization. The advantages of rubber injection molding are: although it is an intermittent operation, the molding cycle is short, the production efficiency is high, the preparation process of raw materials is eliminated, the labor intensity is low, and the product quality is excellent.
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2. Plastic injection molding: Plastic injection molding is a method of molding plastic products, in which molten plastic is injected into a plastic mold under pressure and cooled to form various plastic parts. There are mechanical injection molding machines specifically designed for injection molding. The most commonly used plastics are polyethylene and polypropylene ABS、PA、 Polystyrene, etc.

Fundamentals of Craftsmanship

The purpose, operation, and results of temperature, pressure, speed, and cooling control
How does the adjustment of injection molding machine settings affect the process and quality
Optimize screw control settings
Multi stage filling and multi-stage pressure control; The Influence of Crystallization, Non Crystallization, and Molecular/Fiber Alignment on Process and Quality
The influence of internal stress, cooling rate, and plastic shrinkage on the quality of plastic parts
Plastic rheology: how plastics flow, align, and change viscosity, shear and molecular/fiber alignment relationships
The relationship between the pouring system, cooling system, mold structure, and injection molding process

injection molding machine
The injection molding machine (injection molding machine) has two basic components: an injection device for melting and feeding plastic into the mold, and a mold closing device. The function of the mold clamping device is to:
1. Close the mold under injection pressure;
2. Remove the product from the injection device and melt it before injecting the plastic into the mold, then control the pressure and speed to inject the melt into the mold. There are two designs of injection devices currently used: screw pre plasticizers or two-stage devices, and reciprocating screws. The screw type pre plasticizer uses a pre plasticizing screw (first stage) to inject molten plastic into the injection rod (second stage).
The advantages of screw pre plasticizers are constant melt mass, high pressure and speed, and precise injection volume control (using mechanical thrust devices at both ends of the piston stroke). These advantages are required for transparent, thin-walled products and high production rates. Its disadvantages include uneven residence time (leading to material degradation), high equipment and maintenance costs.
The most commonly used reciprocating screw injection device does not require a plunger to melt and inject plastic.
There are three types of injection molding machines: vertical, horizontal, and fully electric. However, regardless of the type of injection molding machine, its basic functions are twofold:
(1) Heating plastic to reach a molten state;
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The original operation of the injection molding machine is as follows: 3D animation analysis of the injection molding machine, comprehensive understanding of the mold inside, and mastery of the principle
(2) Apply high pressure to the molten plastic to inject it and fill the mold cavity.