Mold clamping force study
Mold clamping force study
Simple solutions for every stage of your journey

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No. Clamp force (t) Shot weight [g] Part visual ok
Shot 1 Shot 2 Shot 3 Shot 4 Shot 5 Shot 6
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Shot weight vs. clamping force
Information
Optimizing by Part Weight

If the design of the mold and part allows it, measuring the part weight is a simple method to optimize the clamping force.

Start out running parts that are full and packed out to an acceptable level at a higher clamp tonnage, then reduce clamp tonnage and record the part weight and visual apperance.

When you notice the part weight starts to increase, that is the point where the mold halves are starting to separate.

Optimizing by using a measuring gauge

The clamping force required for injection molding is primarily determined by useing a measuring gauge to find the the point where the mold halves are starting to separate.

Mold Deflection

To high clamping force or injection pressure can result in mold deflection.

Tech tip

If you have a part that is running at the high or low end of tolerance on critical dimensions, a change to clamp force could throw the dimensions out of tolerance, affect venting, and cause tool wear or damage.