Apr 15, 2026 · In injection molding, material is fed through a hopper into an extruder, where a reciprocating screw mixes and melts the material then injects it into a mold.

Jul 28, 2014 · Are Your Sprue or Parts Sticking? Here Are Some Solutions When a sprue or part sticks, the result of trying to unstick it is often more scratches or undercuts, making the problem worse and …

Nov 28, 2012 · Producing plastics parts with undercuts presents distinct challenges for molders. Undercuts are protrusions or recessions in a part that prevent the mold, after the part is formed, from …

Sep 27, 2016 · Randy Kerkstra has worked in the plastics industry for more than 30 years, specializing in troubleshooting injection molding. His mold experience includes 14 years in the tool shop …

Oct 31, 2018 · Splay adjustments can be a simple fix, or require several hours of babysitting a press and head scratching. Learn to find the root cause.

May 21, 2014 · Fig. 1 The common-core method is one of the more conventional ways of multishot injection molding. When part design allows the use of common-core steel for both first and second …

Dec 1, 2004 · A knowledgeable mold buyer today needs to know about more than mold steels. There are also numerous coatings and treatments that can prolong tool life or add performance, such as …

Mar 25, 2004 · Water injection looks promising for glass-filled nylon automotive ducts, like this part molded by Engel at the K 2001 show. Water-assisted injection molding is the newest way to mold …

Jun 1, 2010 · Secrets of Successful Thin-Wall Molding Demands to create smaller, lighter parts have made thin-wall molding one of the most sought after capabilities for an injection molder.

Plastics Technology covers technical and business Information for Plastics Processors in Injection Molding, Extrusion, Blow Molding, Plastic Additives, Compounding, Plastic Materials, and Resin Pricing