How to Install an Injection Mold

Injection molding is used in automotive, aerospace, ship-making and even jewelry fabrication. The process involves an injection machine that clamps down a mold. It then heats the mold and the material to be cast. The material is then injected into the mold under high pressure. If the mold is installed incorrectly the final product can be ruined. Often it will not inject all the way, leaving a shortened product or it will inject too much, and plastic can shoot out of the mold.

Check to make sure the mold is clean and free of chips after it has been machined.

Open any safety guards on the injection molding machine and put the mold into the injection molding machine. The injection nozzle on the machine must be aligned with the mold cavity.

Adjust the injection pressure, clamp pressure and the volume of material to be injected (if this feature is available). The pressures and volume should have been determined during the design phase of the part and the mold.

Turn on the heater to melt the injection material and to heat the mold. If the mold is heated, the material will flow through more easily without freezing and making a short part.

Clamp the mold with the injection molder’s hydraulics.

Initiate the injection process with an injection button or other command (machines differ). If the part comes out full, the injection machine is set up. If the part is short or material leaks out of the mold, the pressures, volume and the air escape vents on the mold should be checked. Repeat this step until the part comes out full and as desired.

Tips & Warnings
Carefully read the manual and the injection molding process specific to your machine.

Work with the engineer who designed the mold so you know the pressures, volume and any other details about the part.

Dress accordingly. Machine shops can be dangerous, and safety attire should be worn.

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Edited by Leafly Mould Provides Injection Mold, Plastic Mold, Injection Molding, Die Casting Mold, Stamping Mold