Webinar: Step Four of the Molding Cycle, Plastic Cooling

Articles, Press Release, Published Webinars

Plastic cooling rate is one of the four basic plastic variables. Establishing accurate control is vital to a repeatable molding process.

In this FREE webinar, we’ll examine the topic of plastic cooling rate. The rate that the parts cool in the cavity influences many of the finished part properties. Cooling rate is controlled by the mold coolant temperature and its flow rate.

The design and layout of the cooling circuits in the mold play an important part in final part properties. More cooling is required in areas of the cavity where there is more plastic. Often there are several different cooling circuits in the mold to accommodate the need for more or less cooling depending on the part design.

In general, faster cooling leads to a higher degree of molecular orientation near the outer surface of the part. Cooling time is typically the longest part of the molding cycle. The goal is to always cool the part as quickly as possible to minimize the cycle time while maintaining acceptable quality levels and consistent final part properties. For semi-crystalline plastics like polypropylene, polyethylene and nylon, the rate of cooling (mold temperature) affects the crystal size and the amount of crystallinity formation which in turn affects several part properties.

Topics covered include:

  • How cooling rate affects part properties
  • Best operating practices for coolant in/out temperatures
  • How-to methods to reduce cooling times using SimTech™

In this FREE webinar you will see techniques that can dramatically change the way you mold.


Special Guest: Donald C. Paulson

2021 Plastics Hall of Fame Inductee, (read more here), Donald Paulson is the founder and chairman of Paulson Training Programs, Inc. and the creator of the now widely accepted method of teaching plastic processing from the “Plastics Point of View”. Don will join this webinar and give his personal account of his years of research with the General Motors Institute that lead to transforming injection molding from an art to a science. An experience you won’t want to miss.

Visit our webinar page to register for this webinar and upcoming topics. Also, gain access to previously recorded webinars. There’s a wealth of knowledge from Paulson all at your fingertips!

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