Plastics Technology

SEP 2018

Plastics Technology - Dedicated to improving Plastics Processing.

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Injection molding: A pellet goes in, and a few moments later a part comes out. Seems simple enough, but what really happens in between these points, and how can optimization of this process create value for you in your operation? What happens in the machine barrel and the hot runner can significantly impact your molding productivity and quality. In this article you will learn how to recognize ways to improve the process of melt creation, delivery and control so that your operation can put more good parts in the box at the end of the day. Operating a profitable molding facility continues to be a greater and greater challenge. Molding complexity continues to increase due to the demand for thinner, lighter and more complex parts. Customers are asking for increased precision, new resins and additives, multi- materials, higher cavitation, frequent color changes, and faster cycles. As a molding cell is pushed ever closer to its edge of acceptance, any weaknesses in the system become more exposed. These weaknesses can create significantly more difficulties in maintaining OEE (overall equipment effi- By Bruce Catoen Milacron Inc. Molders tend to think about the elements of a melt-delivery system, from screw to hot-runner gate, in isolation from each other. But taking an integrated view of the whole system can have big consequences for cycle time, part quality, scrap rates, and energy consumption. Consider the entire melt- delivery system from screw to hot runner as an integral whole if optimization is to be effective. Pellet to Gate Control: The Value of a Holistic View of Melt Management 54 SEPTEMBER 2018 Plastics Technology PTonline.com INJEC TION MOLDING

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