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The product is the smallest injection molding pressure sensor of its kind.

Clare Goldsberry

March 11, 2017

2 Min Read
Low-cost 6-mm cavity pressure sensor coming on the market

A  new 6-mm cavity pressure sensor from RJG (Traverse City, MI) is the smallest injection molding pressure sensor of its kind and is suited for high-cavitation molds with small, tightly packed ejector pins.

Two models will be available, one rated to 50 pounds for use with ejector pins up to 2 mm diameter and another rated to 250 pounds for pins up to 4.5 mm in diameter. The 50-pound model will be available on April 3, and the 250-pound model will be available in the coming months.

RJG say that the 6 mm sensor is a “robust, indirect (under-the-pin) pressure sensor that works in conjunction with the eDART system to assist molders in diagnosing processes and automatically sorting suspect parts.”

The new model is designed with a sensor head that matches the dimension and installation pocket of the piezoelectric 9211 6-mm button. That means it contains all of the capability of the piezo at a more cost-effective price—approximately 20% less than comparable piezo multi-channel systems. The connector cables can be bent and folded without damage, making them more flexible and easier to maneuver around obstacles, explained RJG.

UBM’s newest design and manufacturing trade show and conference debuts in Cleveland, OH, on March 29 and 30, 2017. On one show floor, Advanced Design & Manufacturing (ADM) Cleveland showcases five zones—packaging, automation and robotics, design and manufacturing, plastics and medical manufacturing. Numerous conference sessions are targeted to the medical manufacturing, automotive and other key industry sectors. Go to the ADM Cleveland website to learn more and to register to attend.

“Smaller sensors are becoming more popular as part complexity and cavitation increase,” said Mike Groleau, Project Manager at RJG. “Our new sensor provides an alternative to the current piezo technology that reduces cost while improving data reliability.”

The 6-mm sensor is part of RJG’s Multi-Channel Strain Gage sensor line, which was designed to simplify in-mold installations for molds with four or more sensors and save real estate. According to RJG, this multi-channel cavity pressure solution, unique to RJG, allows injection molders to connect up to eight strain gage sensors to one connection point on the mold.        

About the Author(s)

Clare Goldsberry

Until she retired in September 2021, Clare Goldsberry reported on the plastics industry for more than 30 years. In addition to the 10,000+ articles she has written, by her own estimation, she is the author of several books, including The Business of Injection Molding: How to succeed as a custom molder and Purchasing Injection Molds: A buyers guide. Goldsberry is a member of the Plastics Pioneers Association. She reflected on her long career in "Time to Say Good-Bye."

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