Exploring the: Injection Molding Zone



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INJECTION MOLDING: ‘Know Your Machine’
Many molders think they “know their machine,” but in reality do not. They get consumed by the demands of day-to-day production requirements and lose sight of the big picture.
Columns Published: 4/23/2014
Industry Expands Again
January was the third month in a row and the fifth time in six months that index was higher than it was one year ago.
Columns Published: 2/25/2014
Let’s Confer…About Conferences
Plastics Technology and sister pubs plan thermoplastic composite in automotive event. Meantime, Molding Conference purchased by PT parent.
Columns Published: 2/25/2014
Shutting Down & Starting Up An Injection Molding Machine
Whether your press is going down for repairs, a holiday, or a slow production schedule, proper shut-down and start-up procedures must be followed.
Columns Published: 2/25/2014
How to Set Barrel Zone Temps
Start by picking a target melt temperature, and double-check data sheets for the resin supplier’s recommendations. Now for the rest...
Columns Published: 1/23/2014
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

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