The Secrets of Building a Plastic Injection Molding Machine

The Secrets of Building a Plastic Injection Molding Machine
Written and Illustrated by
Vincent R. Gingery
David J. Gingery
Table of Contents
Introduction 6
How Injection Molding is Done 8
A Young Industry 12
What is Plastic 14
Identifying Types of Plastic 15
Design Considerations 16
Materials Needed 19
Material List . 21
Tools and Construction Methods 25
Building the Frame 26
The Injector Assembly 41
The Adjustable Work Table 47
The Heater Block Assembly 50
Mounting the Heater Block
& Guide Bushing 54
Installing the Thermometer 58
Installing the Cartridge Heater .. .60table of Contents Table of Contents
Installing the Thermostat 61 Using Molding Plaster of Paris 117
Wiring the Machine 67 Casting a Mold for a Small Knob 119
Injection Molds 79 Conclusion 124
Mold Construction 80 Sources for Parts and Material 125
Making the First Mold 82
Safety First 88
Injecting Plastic Into Your First Mold 90
Troubleshooting Your First Project 94
A Knob Mold for the Adjustable Table 95
The Clamping Fixture 100
Injecting and Installing the Knob
For the Adjustable Table 102
Making a Mold for a Plastic Container . . . 103
Making a Mold for a Snap
Lid for the Container. . . . 109
Casting Molds 113
Using Epoxy Resin
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