MoldMaking Technology

DEC 2018

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Page 32 of 50 31 FOR MORE INFORMATION Alba Enterprises / 800-432-6653 / a day, and the couplers last for years. "I can get five to eight years out of them. Plus, Alba has expanded its line to provide more flexibility in threads" Cardinale says. That is impor- tant because with every molding machine operators want to match the thread that they have. When they have to make adapters, they lose some of the stroke distance. Operators want to maximize the amount of stroke that they have for all their machines, so they want that coupling to be flush against that ejector plate. Being able to match the thread to the plate is paramount. These couplers also have a hex socket for easier tighten- ing to ensure that the couplers are seated properly. The hex socket makes this step a lot easier because couplers can be difficult in regard to fitting a wrench in the limited amount of space available to tighten the coupler into the plate. "The hex socket inside permits a hex socket bit with a 3/8 rachet inside to tighten them easily," Cardinale says. It is important here to ensure that the coupler and barb are seated against the knockout bar face and in the ejector- plate counter bore. "This distributes the force across a broad surface, ensuring long, trouble-free operation. Failures occur when the coupler is not seated, and the threads take the full force of the plate actuation," Rich Oles says. Cardinale also warns that the coupling must be flush to the plate and that the knockout bars should be cut to the same length. Specifications on Alba barbs and couplers are very tight. The beauty of that is that distances on the couplings for the tie-ins will yield very level, even pushing, retraction and ultimately no binding on the ejector assembly if the bars are cut exactly to spec. The result is extended ejector assem- bly life with fewer interruptions from failures. "The more you guide, the better you guide, and the evenness of the guiding of the forward and backward positions means less wear and tear," Cardinale says, "Still today, if I'm using knockouts and ejectors, then I'm using those couplings." The bottom line is that it is time to seek out solutions like the right coupler if a shop is spending any measurable amount of time performing non-value-added functions, such as threading in-and-out knock-out bars and repairing damaged threads or coining in the ejector plate. Let's face it—the business of injection molding is selling time. So, the more time that a shop spends molding good parts, the less time it spends rescheduling, boosting the amount of its on-time deliveries and increasing how often it hits planned profits. INSIDER E N G I N E E R B U I L D M A I N T A I N KEEP CURRENT AND CUTTING EDGE! Sign up for the MMT Insider at: Insight delivered direct to your inbox! Delivered monthly direct to your inbox, the MMT Insider includes application stories, video highlights, technology reviews, featured archived content, and industry news and events from MoldMaking Technology staff and industry experts. Each issue builds upon the magazine's mission of providing extra insight into the technology and business sides of mold manufacturing.

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