Know How - Injection Molding

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Published: 1/27/2015

INJECTION: First to Second Stage Transfer: Should There Be ‘Bounce-Back’?
How much screw ‘jumping’ or bounce-back can your process tolerate? The answer is no surprise: It depends

Published: 1/20/2015

Injection Molding Know How, Live
Upcoming training by Plastics Technology's Injection Molding Know How columnist, John Bozzelli, will walk injection molders through new tool process development via scientific molding.

Published: 12/29/2014

INJECTION MOLDING: Another Way to Deal with Regrind
You can run into a lot of problems molding parts from a blend of regrind and virgin material. Might you be better off using 100% regrind?

Published: 11/24/2014

High-Pressure Water: A New Concept for Screw Cleaning
Everyone in a molding plant is on the same page for screw cleaning: Avoid pulling it until there is no alternative. Here are ways for dealing with the inevitable, including an altogether new technique.

Published: 10/23/2014

INJECTION MOLDING: How to Tell If Your Non-Return Valve Is Leaking
Check valves are potentially troublesome devices. Here’s how to find out if yours is behaving properly.

Published: 9/22/2014

INJECTION MOLDING: How Does Your Machine Control Pack Velocity?
You’ll need to find out in order to develop a molding process that you can repeat from machine to machine and mold to mold.

Published: 8/25/2014

INJECTION MOLDING: The Importance of Nominal Wall For Lightweighting Molded Parts
Establishing a nominal wall is one of the most important decisions an engineer makes when designing parts. Understanding how design changes will impact the manufacturing process is critical to ensure the part performs as expected.

Published: 7/28/2014

INJECTION MOLDING: Are Your Sprue or Parts Sticking? Here Are Some Solutions
Nine times out of 10 when a sprue or part sticks, the result of trying to unstick it is more scratches or undercuts, making the problem worse and the fix more costly. Here’s how to set up a proper procedure for this sticky wicket.

Published: 6/19/2014

INJECTION MOLDING: Setting Mold Protection Takes Time But Saves More
Mold protection is often neglected, but it more than pays for the time and attention required.

Published: 5/21/2014

INJECTION MOLDING: Troubleshooting Bridging
Bridging is an aggravating problem that can shut you down. Here's how to find it and fix it.