What is the structure of the plastic mold?

Author: MULAN - Plastic Molding Manufacturer

Injection molding of plastic molds is a processing method used for mass production of some complex shape parts. The specific principle is: push the heated and melted plastic raw material into the cavity of the plastic mold with the screw of the injection molding machine under high pressure, and after cooling and solidifying, a plastic molded product is obtained. The plastic mold consists of a movable mold and a fixed mold.

The movable mold is installed on the movable template of the injection molding machine, and the fixed mold is installed on the fixed template of the injection molding machine. During injection molding, the movable mold and the fixed mold are closed to form the casting system and cavity. When opening the mold, separate the movable mold from the fixed mold to take out the plastic product.

Although the structure of plastic molds may vary greatly depending on the variety and function of the plastic, the shape and structure of the plastic product, and the type of injection molding machine, the basic structure is the same. It is mainly composed of: pouring system, temperature control system, forming parts system, exhaust system, guiding system, ejection system, etc. Among them, the pouring system and molded parts are parts that are in direct contact with plastics and vary with plastics and products.

They are the most messy parts in plastic molds, they change a lot, and require high machining accuracy and precision. Gate system: refers to the part of the runner before the plastic enters the cavity from the nozzle, including the sprue, cold block, runner and gate.