Tal Z,
I would be very interested in seeing the responses to calculate mold life.
We have been injection molding for over 40 years and still use a dartboard
for this estimate. The biggest obstacle is defining mold death. There
always seems to be a way to bring a mold back to life and avoid that call to
the Coroner.
With soft and bridge tooling, plastic material vs. insert material is the
biggest issue. Frail mold components can be handled with steel inserts to
create hybrid tooling.
In production tooling, motion and shutoffs are the first to go. Steel
motion within a tool is usually designed with sacrificial components that
are inexpensive to replace. Complex shutoffs and tapered shutoffs will wear
depending on the angles and drag but the welders and platers are ready to
come to the rescue.
Part design is a major issue and will be unique to each new part. Our
larger customers that buy lots of molds each year like to use the
industries' general rule of thumb: “One million shots per cavity before
rework with non-abrasive plastic materials”. We are still looking for the
guy that authored that rule.
Joe
-----Original Message-----
From: tal.zarum@aks.com <tal.zarum@aks.com>
To: rp-ml@bart.lpt.fi <rp-ml@bart.lpt.fi>
Date: Thursday, September 30, 1999 5:22 AM
Subject: Mold's parameters
>Dear RPs,
>I am in search of methodology of evaluation of theoretical mold or
>die life of different materials. I want to know that what are the input
>parameters required for the methods. If anybody can help me regarding this
>problem, please respond me immediately.
>
>talz@aks.com
>
>Thanks , Tal Z
>
>
>For more information about the rp-ml, see http://ltk.hut.fi/rp-ml/
For more information about the rp-ml, see http://ltk.hut.fi/rp-ml/
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