Exploring the: Injection Molding Zone



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How to Establish an Acceptable Range for Pressure at Transfer
Pressure at transfer tells you the viscosity of the resin, providing the fill time is the same. Monitoring pressure at transfer—or better yet, the integral under the pressure vs. time curve—provides insight into the process.
Columns Published: 12/29/2013
Melt Flow Rate Testing—Part 6
Once degradation has been established, the discussion inevitably turns to how it happened. It might be expected that the answer to this question is widely known. Not so. The good news is that the influences that cause polymer degradation during proc...
Columns Published: 12/29/2013
Minimizing Black Specks
Black specks in molded parts are one of the most infuriating problems to resolve on the shop floor. Here's how to fix them.
Columns Published: 11/26/2013
How to Stop Flash
Troubleshooting flash is complicated, and often there is a lot of tail-chasing on the shop floor in trying to get a solution. This approach should lead you to the solution via a data-driven procedure.
Columns Published: 10/24/2013
Don’t Forget the Cold Slug Well
Its primary function—as the name suggests—is to act as a trap, or “well,” for the cold slug.
Columns Published: 9/23/2013
‘Auto Compensate’ Your Press To Handle Viscosity Variations
Here's how to put your injection molding machine on cruise control to make consistently good parts even in the face of material viscosity variations.
Columns Published: 8/26/2013
Level Your Press in an Hour or Less
A level injection molding machine is necessary to keep producing high-quality parts. Here's how to do it right.
Columns Published: 7/29/2013
Pay Attention to Heat Transfer
Money will be lost if cooling is not done right.
Columns Published: 6/24/2013
What's Different About Molding Engineering Plastics
If you try to run them like commodity materials such as PP you'll have problems.
Columns Published: 5/28/2013
Take a Scientific Approach to Troubleshooting
Taking a scientific approach minimizes the 'art' of molding, which is particularly helpful when troubleshooting
Columns Published: 4/29/2013

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