Plastic injection molding, extrusion in the spotlight

“Discover, Engineer, build” is a fitting slogan for the Virtual Engineering Days, which are planned for June 15-17, 2021. The virtual event is aimed at manufacturing professionals and engineers from a spectrum of markets, but two conference sessions are specifically designed to meet those plastics processing goals. Allan Griff will unveil the 10 Key Principles of Extrusion, Plus One on Tuesday, June 15 at 1:45 pm Eastern Time. The following day, on Wednesday, June 16 at 12:30 pm Eastern, Michael Paloian will present “Design for Injection Molding: How to Certain Success and Avoid Costly Errors”.

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Long-time PlasticsToday columnist Allan Griff stated that he will be putting his decades of experience in extrusion technology into a non-academic presentation that will provide attendees with tools to ensure manufacturing and commercial success. In particular, Griff told PlasticsToday that he will focus on “understandable but misleading concerns about machine costs and sometimes energy costs when the main cost of running the line is materials and sales and pricing should be the main concern.” He will also emphasize the “need to measure and record process data and have people to look at it, understand it, and act when necessary”. An important aspect for participants, added Griff, will be a better understanding of the importance of materials, especially viscosity and degradation.

In addition to his regular column on all topics related to extrusion in PlasticsToday, Griff is the author of Plastics Extrusion Technology, the first practical extrusion book in the USA, and the Plastics Extrusion Operating Manual, which has been updated almost every year since it was first published.

Michael Paloian founded the industrial design company Integrated Design Systems Inc. in 1983 and holds more than 40 patents. His presentation on successful injection molding design will discuss some of the key challenges engineers and operators face, including maintaining tolerances during production and designing parts for long-term performance.

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Michael Paloian

“Predicting tolerances that can be met during production is always a challenge,” Paloian told PlasticsToday. “This is especially true when features have to adhere to tolerance ranges outside of industry standards. Examples of these features are snap fits, interference fits, and lap joints between covers. If the tolerance deviations are too large, the parts will not work as expected due to the excessive play, and if the clearances are too tight, the parts may not fit together as expected, ”explains Paloian.

In terms of performance, Paloian notes that while many of the basic physical properties of plastics are easy to find online, long-term properties are a different matter. “Wear resistance, fatigue resistance under specified loads and temperatures, creep resistance, and resistance to environmental stress cracking often require engineers to test parts under real-world conditions for extended periods of time. Long-term testing is expensive, time-consuming, and tedious, ”said Paloian.

Sink marks, gate position, and shut-off angles are some of the other injection molding-related topics that Paloian, a regular contributor to PlasticsToday, will cover in his 45 minute presentation.

Both speakers will answer questions from the participants in their presentations.

A number of other sessions of the Virtual Engineering Days are aimed at plastics professionals, including a conversation with Tony Radoszewski and Perc Pineda from the Association of the Plastics Industry on the politics, politics and economics of the industry on June 15th Plastics in the rapidly developing automotive market on June 16th. A full program can be found on the Virtual Engineering Days website.

Virtual Engineering Days is produced by Informa Markets – Engineering, which also publishes PlasticsToday.

Registration for the event is free. See you – virtually – there!

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