Articles
Commodity Resin Prices Shoot Up
Unplanned disruptions in polymer feedstock production in December, to be followed by a number of planned cracker outages slated for the first four months of this year, helped drive up monomer and resin prices, especially of PP, but also including PE, PS, and PVC.
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Troubleshooting Mold Temperature Control
Mold-temperature control is just one of many process elements that can affect the quality of an injection molded part.
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Molders Go ‘Rapid’ for Prototyping and Manufacturing
Three forward-thinking custom molders have taken steps to streamline their manufacturing, expand new product development, and add to their customer base—and all in a more cost-effective manner than ever before.
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Designing a Thermoforming Plant For Efficiency and Productivity
Building a new plant in 2003 gave Lyle Schut a clean slate.
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Moldmaker Explores New LSR Molding Technologies
Can liquid silicone rubber (LSR ) be overmolded onto polypropylene?
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Screw Cooling
In most cases, screw cooling will benefit the process by giving the operator another “zone” of control on the extruder. The main theory of “solids conveying” is that the resin must “stick to the barrel” and “slip on the screw.” By cooling the root of the screw, it will reduce the coefficient of friction between the steel of the screw and the plastic pellet. By cooling the root of the screw, it will reduce the coefficient of friction between the steel of the screw and the plastic pellet.
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New Drying Technology Helps Moldmaker Get Back to Molding
System solves quality problem that had hamstrung previous molder.
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A Processor’s Advice on How to Get Moisture Testing Right
Follow these four steps to ensure your results are on target.
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The Evolving Barrier Screw
There has been a gradual transition from the earlier Maillefer designs used in Europe to the Dray/Lawrence design using the parallel barrier design with an increased helix angle to accommodate wider channels.
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Dimensional Stability After Molding—Part 2
After molding, acetal parts can continue to shrink at room temperature and even in the cold.
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Studies Boost Prospects For High-Speed Extrusion
Study shows that high-speed, single-screw extruder can significantly boost the processing capability of a small-diameter machine for a wide range of applications
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