Know-How
Tracing the History of Polymeric Materials: The Differences Between Nylons & Polyesters
In many respects, nylons and polyesters appear to be interchangeable. But there are interesting differences in the properties of these two families that arise from their chemical structures.
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How to Set Up Mold Protect on Your Injection Machine
Set the start position for mold protect where anything in the mold could be subject to damage.
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What's Controlling Your Cycle Time: Part 3
Follow these guidelines to maximize your profits.
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Revisiting the '5 M's' of Molding
All injection molding ultimately comes down to the “Man, Mold, Machine, Material and Method.” But those key aspects can be viewed differently if you’re auditing mold changes before startup or troubleshooting changes for an already validated process.
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How to Know the True Value of Conformally Cooled Injection Molds
What’s the return on investing in a new mold with conformal cooling to boost productivity? Will it pay for itself? How soon? Here’s a case study on how to answer those questions.
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Tracing the History of Polymeric Materials: Polyesters
Beyond PET, PBT and their analogues, development of polyester chemistry led to unsaturated thermosetting resins, copolyester thermoplastic elastomers, liquid-crystal polymers and, most recently, biopolymers.
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Why Are There No 'Universal' Screws for All Polymers?
There’s a simple answer: Because all plastics are not the same.
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Tracing the History of Polymeric Materials: PBT
The slow crystallization of PET polyester made it a poor option for processes like injection molding. This led to the development of more molder-friendly options such as PBT.
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Understanding Fountain Flow in Injection Molding
The phenomenon of fountain flow affects almost every aspect of the molded product—starting with filling, extending to pack and hold, and ultimately manifesting in part defects like bubbles and voids.
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What’s Controlling Your Cycle Time? Part 2
Follow these mold-cooling guidelines to maximize your profits.
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