Injection Molding Mold Introduction and Basic Classification - Multiple Precision Plastic Injection Molding

 

Introduction to Injection Molds:

 

An injection mold is a tool used to produce plastic products; it is also the tool that gives plastic products their complete structure and precise dimensions. Injection molding is a processing method used for mass production of complex-shaped parts. Specifically, it involves injecting heated and melted plastic into a mold cavity under high pressure by an injection molding machine, and after cooling and solidification, the molded product is obtained.

 

Basic Classification of Injection Molds:

 

Injection molds are classified into two types based on their molding characteristics: thermosetting plastic molds and thermoplastic plastic molds.  Based on the molding process, they are classified into transfer molds, blow molds, casting molds, thermoforming molds, compression molds (compression molding molds), and injection molds. Among these, compression molds can be further divided into overflow type, semi-overflow type, and non-overflow type based on the overflow method, and injection molds can be further divided into cold runner molds and hot runner molds based on the gating system; based on the installation and removal method, they can be divided into movable type and fixed type.

 

Thermoplastic Molding

Fully functional parts can be manufactured by precisely injecting resin into a pre-made mold. This process produces components with excellent surface finish that are ready for immediate use, making it ideal for rapid prototyping or mass production.

 

Insert Molding

Insert molding integrates metal, ceramic, or plastic parts into a plastic injection mold in a single molding process, reducing time, resources, and costs, resulting in a structurally stable and complete component.

 

Rotational Molding

Rotational molding is best suited for manufacturing small, complex-shaped parts. This process, which heats resin inside a rotating mold, can produce hollow, one-piece plastic parts with the advantages of short cycle times and high production efficiency.

 

Overmolding

Overmolding is a cost-effective process that utilizes injection molding technology to produce multi-layered, textured parts using multiple resins with unique properties. Unlike insert molding, overmolding does not require additional adhesives to combine two parts into a complete component.