Does your machine have a secret screw recovery timer?

07/23/2012

Since my last article reviewed a subject covering a fundamental of a robust process, I decided to continue with that theme and cover screw-recovery time.

You might think screw-recovery time should be rather simple to set. We could throw out general statements such as "screw-recovery time should be set to finish recovering moments before the mold opens" and leave it at that. Most of the time this would probably work, but this doesn't always hold true. Unless you have performed studies on the recovery time, you might not be aware of the following:

Some machine manufacturers have a built-in timer that delays the mold opening for up to three seconds after the screw has recovered.

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