Page 42 - Injection Molding Advanced Troubleshooting Guide

24 2 Troubleshooting Tool Kit

ducting a dew point check on the dryer will determine if the dryer is capable of
reaching adequate levels (typically −40 °F).

„ „2.10„ Flashlight

A flashlight is a cheap tool that is valuable to help see better detail on a part. An
example is EDM marks or lack of polish on a core will be much more apparent
when using a flashlight for inspection. When looking into a mold that is in the
press, shadows will obstruct a clear view, but often times a simple pen light will
solve this problem.

„ „2.11„ Microscope/Magnifying Glass

Sometimes magnification is the only way to identify what a defect really is. Having
a magnifying glass and/or a portable microscope can allow a much closer examina-
tion of the defect to determine for example if it is splay or a scratch. Portable USB
microscopes are now available for low cost and allow photographing of a defect or
area of concern, which is very useful when communicating a problem.

„ „2.12„ Silly Putty

Silly putty is a very simple item that can prove useful. When wondering if a partic-
ular defect is in the mold steel, pressing silly putty unto the area can sometimes
provide a clear answer. It is also very useful for looking at small and hard-to-see
details such as date wheels.

„ „2.13„ Inspection Mirror

Inspection mirrors are a handy item to help see hidden areas in a mold, and can as
well as be used to inspect other challenging areas such as feed throats.