Honeywell CS071AE User Manual page 5

Description of Problem
Inconsistent part.
Warped parts.
TROUBLE-SHOOTING GUIDE
Possible Causes
• Uneven heat on plastic
sheet.
• Bad regrind in plastic sheet.
• Part too difficult for the
forming technique being
used.
• Parts are cooling unevenly.
• Mold too cold.
• Clamp frames too cold.
• Excessive gauge variation
on the finished part.
• Demolding temperature too
hot.
• Overheated sheet. Material
Possible Corrective Action
• Check for air drafts in the heating
oven.
• Check the sheet for a variation in
gauge.
• Check for power output variations.
• Do an IR or a Brabender test to
confirm compound consistency.
• Change to a technique that is
suitable.
• Use temperature controlled tooling.
• Check temperature controlled
tooling for water flow blockages.
• Check the material distribution on
the mold. Is the proper forming
technique being used?
• Check if the plastic sheet is being
pulled tightly against the mold.
Very important in forming the
olefins.
• Check cooling fans for proper
placement.
• Check for plugged vacuum holes.
• Preheat the mold.
• Preheat the clamp frames. This is
especially important when forming
the olefins.
• Change forming technique to get
better material distribution.
• Insert screens in the oven to shade
out thinning areas.
• Gauge on flat sheet may be all over
the lot. Check various areas of the
sheet for gauge differences.
• Check for hot spots in the oven.
Do the thin spots occur on the
same spot consistently?
• Increase cooling cycle.
• Decrease mold temperature.
• Get more cooling fans cooling the
part.
• Cut back on oven cycle time or
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