Take a simple way to understand the injection molding process.

Take a simple way to understand the injection molding process.


What is Injection Molding: The injection molding process is a process of making semi-finished parts of a certain shape from molten raw materials through operations such as pressurization, injection, cooling, mold opening, and mold release. Its raw materials are ABS\PE polyethylene, PP polypropylene, PA, polystyrene and so on.

Principle of injection molding process: Granular or powdered raw materials will be added to the injection molding machine silo, the raw material by heating and melting was fluid state, in the injection molding machine screw or piston rod to promote the injection molding machine, through the nozzle and die-casting mold casting system software into the mold concave mold, the mold concave mold in the mold hard bottoming and shaping.

The application: Injection molded products can be applied to many industries, most of the plastic products on the market are derived from the injection molding process, such as plastic toys, your home computer TV back cover, air freshener, garbage cans, intelligent robots shell, etc., as far as the eye can see, a lot of plastic parts are derived from the injection molding process out of the product.

The advantages: ① fast production speed, high efficiency. ②the operation can be automated.  ③color variety.  ④the shape can be from simple to complex. ⑤the size can be from large to small, and the product size is accurate. ⑥Products are easy to update. ⑦can become a complex shape of the parts, suitable for mass production and shape of complex products and other molding processing areas.

Injection molding commonly used plastic raw materials: ABS, PP, PVC, PC. Mold commonly used materials: 45 #, P20, 718, 738, S136.

The different between PP material and ABS material:  The two materials have different properties and uses. ABS material performance: better overall performance, high impact strength, good chemical stability, good electrical properties. Good fusibility with 372 organic glass, made of two-color plastic parts, can be surface chrome plating, spray paint treatment. High impact, high heat resistance, flame retardant, enhanced, transparent and other characteristics. PP material properties: crystalline material, hygroscopicity is small, easy to melt body rupture, long-term contact with hot metal is easy to decompose. Good mobility, but shrinkage range and shrinkage value is large, easy to occur shrinkage dent, deformation phenomenon.

Post time: Aug-14-2023