Cutting Costs in Short-Run Plastics Injection Molding

Written by Morgan Industries, Inc.

Table of Contents

Injection Molding Process

• Theory in injection molding
• The practice of injection molding

Tool Design and Building

• Hand molds
• Semi-automatic molds
• Automatic molds
• Tool quality designations
• Making the tooling decisions
• Mold design
• Gating
• Tool building
• Tool making materials
• Mold finishing

Part Design and Material Selection

• Tolerances
• Thermoplastic materials
• Fillers and modified materials

Epoxy Tooling

• Advantageous
• Limitations
• Types
• Economics
• Running of epoxy molds

Case Examples of Short-Run Molding Requirements

• 2 plate tools emphasizing lathe work
• 3 & 4 plate tools emphasizing lathe work
• 2 plate tools emphasizing mill work
• Multi-cavity & semi-automatic tools
• Epoxy tooling
• Tools made using EDM technique

Material Handling

• Nylon
• A.B.S.
• Acetals
• Troubleshooting

Injection Molding Equipment

• Morgan-Press injection molding line

Appendixes

• Draft angle table
• Shrinkage factor table
• Plastic properties chart

Order this do-it-yourself plastic injection molding engineering guide