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A forum with a wide range of engineering-related topics

How It's Made: Plastic Injection Molds
From the popular "How It's Made" series on the Discovery Channel


DME collapsible core
Animation demonstrating an automated mold component that forms threads or an undercut in a cap shape.


Materials


Material Selection for Plastics and Rubber (.pdf)

Things to think about, some perhaps surprising, when choosing a material. Includes checklist.

Thermoplastic versus Thermoset
What the terms mean.

UL Prospector
Materials database.

Matweb

Materials database.


Plastics design

GE Plastics Injection Molding Design Guidelines


Rubber part design


RMA Molded Rubber Tolerance Chart (.pdf)
INDIANA Rubber & Plastics Company, Inc.
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