SHQD: Provide Plastic Injection Molding Full-Service Manufacturing

What is plastic injection molding?

Injection molding is a method to obtain molded products by injecting plastic materials molten by heat into a mold,and then cooling and solidifying them. Injection molding is the most commonly used manufacturing process for making plastic parts.

Benefits of plastic injection molding

1. Plastic injection molding is ideal for producing high volumes of the same object

2. Parts can have complex geometries;

3. Highly efficient and repeatable manufacturing processes;

4. Automation means lower costs;

5. A variety of material choices can be used.

Detailed process of injection molding

The raw plastic material is melted in the injection unit and then “shot” / injected rapidly into the mold under high pressure.

The plastic material is cooled by circulating water through the mold to transfer and remove the heat from the steel mold,thepart solidifies as cooled,the mold opens and the part is ejected from the cavity of the mold.

The entire process or “cycle” is completed in seconds and then repeated.

The key steps in injection molding

Clamping: The mold’s two sides are sealed shut under hydraulic pressure;

Screw Recovery: Plastic material is fed into the barrel and conveyed via a rotating screw down the barrel toward the front of the screw. As the material is conveyed it is heated to the specified melt temperature creating the “shot” or volume of material to be injected;

Injection: The screw is pushed forward injecting the material under very high pressure into the mold;

Cooling: Water circulated through channels in the mold to remove heat and solidify the molded part;

Ejection: The clamp releases,the mold opens and part is ejected from the mold.