Know How - Injection Molding

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Published: 10/18/2016

Two-Shot Molding and Tool Design
There are a few variations of the two-shot molding process, and each has implications for tool design.

Published: 10/18/2016

Faster Is Not Always Better—Optimize Your Molding Cycle
It is possible for machines to run too fast, so find the sweet spot where maximum output overlaps with good parts.

Published: 9/27/2016

Water Droplets in the Feed Throat
And other reasons you must dry hygroscopic resins.

Published: 8/24/2016

INJECTION MOLDING: How to Mold Living Hinges With No Flexing Required
Here are the five critical, intertwined components that must be perfected for a living hinge that doesn’t need to be flexed upon ejection.

Published: 7/19/2016

INJECTION MOLDING: Purging: A to Z
Use these steps as a guide to minimize the time and money it takes to switch materials and color on your presses.

Published: 6/22/2016

INJECTION MOLDING: How Different Machine Types Handle Fill and Pack/Hold Times
The procedures are different between series and parallel machines. What type do you have? How can you tell? Here’s what you need to know.

Published: 5/26/2016

INJECTION MOLDING: Processing Nylon…and Other Problems
As moisture content in this and other hygroscopic resins varies, so will your viscosity and process. Here’s how to deal with these issues

Published: 4/25/2016

INJECTION MOLDING: Gate Freeze Study: Danger in a Name?
The test actually determines the hold time needed to mold repeatable parts, and it should be done regardless of whether the gate freezes or not.

Published: 3/24/2016

INJECTION MOLDING: Properly Placing & Cooling Insulator Plates
Thermal-energy management from the mold to the platens is critical for making consistent parts.

Published: 2/22/2016

INJECTION MOLDING: Do You Need to Profile Injection Velocity?
Look at the parts. If the answer is yes, the on-machine viscosity curve can help.