DME University

Introduction to Injection Molding

Injection molding of thermoplastics is possible because of the characteristics of thermoplastic materials. This process consists of melting a thermoplastic material to a predetermined shot size and then injecting the plastic into a cooled mold where it is formed. Once formed, the part is then ejected from the mold. The injection molding machines used in industry are rated by clamp size (tons) and injection capacity (ounces of general purpose polystyrene) and are classified as hydraulic, toggle or electric machines. These machines are typically divided into four sections; injection unit, clamping unit, controls, and the mold.

This training course will cover injection press support systems, injection unit components, clamping unit components, machine components, mold base technology, thermoplastic materials, and the injection molding process.

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