EC sprue bushings These new Cumsa bushings help the ejector pin release plastic pillars in the runners when using a mold with banana- or cashew-shaped gates. Designed to facilitate material flow and reduce stress concentration, such gates are particularly useful in molds for parts with complex geometries or thin walls. They are automatically de-gated and can be placed in hidden areas that do not interfere with a part’s surface appearance requirements.
What’s new? The components, available since October. The bushings come in several sizes and two versions: with or without a collar.
Benefits Cost and time savings, by preventing ejector pins from breaking or ejector holes from seizing up, due to the force that’s normally necessary to extract plastic waste when using C-shaped gates. The new bushings make this process easier, with less risk of damage. Also, the components are easy to position and adjust.
Cumsa, Troy, Mich., 248-850-8385, https://cumsa.com
Karen Hanna | Senior Staff Reporter
Senior Staff Reporter Karen Hanna covers injection molding, molds and tooling, processors, workforce and other topics, and writes features including In Other Words and Problem Solved for Plastics Machinery & Manufacturing, Plastics Recycling and The Journal of Blow Molding. She has more than 15 years of experience in daily and magazine journalism.
