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R&B Plastics Machinery Blog

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NPE 2012
NPE 2012
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Field Service Support

We have a dedicated service team with over 450-years combined experience. They include mechanical, electrical, and hydraulics/pneumatics specialists. Call us for assistance with any make or model of blow molding or extrusion equipment.
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Preventive Maintenance & Tech Tips

Slideshow: Things Your Extruder Screw Designer Never Told You About Screws

View more presentations from R&B Plastics Machinery View our MAX Impact Extrusion Screws >>

Basic Screw Geometry: Things Your Extruder Screw Designer Never Told You About Screws

As originally published in 1996 View more documents from R&B Plastics Machinery

Screw Recommendations for Specific Resins and Processes

Tim Womer, Chief Process Consultant at R&B Plastics Machinery LLC, has over 35-years experience in the plastics industry. His specialty is feed screw design and process analysis to determine the best screw geometry and process parameters needed to obtain excellent melt temperatures, optimum screw speeds, and head pressures for diverse plastics applications. This also includes recommendations for trouble-shooting existing process problems.

Worn Reciprocating Extruder Screws – What’s the big deal?

In reciprocating blow molding, most processors fail to identify the signs that the recip extruder screw is beginning to wear. Some such signs is having to run the plastic extruder screw at a faster RPM than normal, beginning to see un-melts in the container, and the tail length of the container’s flash begins to vary - are all certain signs of screw wear.