Plastic Injection Insert Mold

Insert injection molding mold is a special type of injection mold. The insert mold is also a type of secondary molding mold (Other names: IMD, Insert mold, insert molding tooling, capsulation ) In the injection molding process of inserts, metal, ceramic, plastic and other materials are prepared in advance and placed in specific positions on the mold. Then, the molten plastic is injected into the mold cavity through an injection molding machine, and the plastic will wrap around the insert during the flow and cooling process, making it an integrated injection molded part with the plastic.

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The design and manufacturing of injection molding molds for embedded parts need to consider the following key factors

Positioning and fixation of inserts: Ensure that the inserts do not move or deform during the injection molding process to ensure the dimensional accuracy and performance of the injection molded parts.

The gate and runner design of the mold: To ensure that the plastic can evenly fill the mold cavity and fully wrap the embedded parts, avoiding defects such as short shots and air holes.

The cooling system of the mold: A reasonable cooling layout helps to improve production efficiency and the quality of injection molded parts.

Draft mechanism: It is necessary to design a suitable draft method to smoothly remove injection molded parts with inserts, while avoiding damage to the injection molded parts. Insert injection molding technology is widely used in fields such as electronics, automobiles, and household appliances, such as plastic products with metal screws, connectors with metal inserts, and so on.

What is the difference between overmold and insert mold?

The over mold and the insert mold are not the same concept.

Plastic injection over mold refers to injecting a layer of plastic with different materials onto the outer layer of the already formed plastic part to achieve specific performance or appearance effects. For example, to increase tactile comfort or improve slip resistance, a layer of soft plastic is wrapped on the outer layer of hard plastic. Insert injection molding molds place pre prepared metal or other material parts in the mold during the injection molding process, and then inject plastic to wrap and fix them, making the insert a part of the injection molded part, thereby endowing the injection molded part with specific functions or structures. In short, the main difference between the two lies in the different objects being processed. One is to inject the outer layer of the formed plastic part, and the other is to embed parts made of other materials during injection molding.