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Plastics Manufacturing Q&A

Plastics Manufacturing Q&A


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22/09/2016

How is Toggle Clamp tonnage measured?

With toggle clamps, the only way to measure tonnage is to measure the strain (stretch) of the tie bar.

Question:
How do you measure the tonnage on a toggle molding machine:

My Answer:
With toggle clamps, the only way to measure tonnage is to measure the strain (stretch) of the tie bar. Using the strain measurement of the tie bar, the force on the tie bar can be calculated if the tie bar material is known. If that is multiplied by the number of tie bars, the tonnage is determined. Most newer molding machines use a strain gauge mounted on or in the tie bar. The best measurement can be obtained using an ultrasonic measurement through the tie bar to determine the exact amount of stretch in each tie bar. This equipment is expensive, but there are many machine evaluation consultants you can hire to do this.

-Andy
Routsis Training
www.traininteractive.com



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