Introduction of common mold types for injection molding

When the single parting surface injection mold in injection molding is opened, the movable mold and the fixed mold are separated to take out the plastic parts, which is called a single parting surface mold, also known as a double-plate mold. It is the simplest and most basic form of injection mold. It can be designed as a single-cavity injection mold or a multi-cavity injection mold according to needs. It is the most widely used injection mold.

The double-parting surface injection mold in injection molding has two parting surfaces. Compared with the single-parting surface injection mold, the double-parting surface injection mold adds a partially movable intermediate plate (also called the movable part) in the fixed part. The gate plate, on which there are gates, runners and other parts and components required for the fixed mold), is also called a three-plate (moving template, intermediate plate, fixed template) injection mold, which is often used for point gate injection. When the mold is opened, the intermediate plate is separated from the fixed template by a certain distance on the guide column of the fixed mold, so that the pouring system condensate can be taken out between the two templates. The double-parting surface injection mold has a complex structure, high manufacturing cost, and difficult parts processing. It is generally not used for the molding of large or extra-large plastic products.