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Troubleshooting Guide – Linear Polyethylene Problem Possible Cause Suggested Remedy 5. Warped parts Inadequate venting • 10 to 13 mm (3/8" to 1/2") diameter vent per cu ft. of mold volume is suggested for thin-walled parts. Ensure end of vent not plugged. Non-uniform cooling of the mold caused by resin pulling away from the mold wall. (Note direction of warpage - convex or concave) • Rotate mold during cooling cycle. • Provide adequate venting and make sure vents are not clogged. • Use less mold release. Excessive or too effective a mold release agent. • Avoid large, flat panels in part design if possible. Warped tank wall 15PDF Image | Troubleshooting your rotomolding operation
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