Cracking Molded Case Parts and/OR CRAZING Can Be DEFINED As A Fraction Orced PARD PART, USUALLY FOUND in WELDLSONELENELERSOLONERSOLOLOLOLOLOLORERORERAEROREAEAAEAAAAEAAOOAOAAAAOAAAAAOAAAAAAAEAAEAEAsedsedAAationationctctctctctctctationsctctular wayctctctctctularctctctctularctctctctctctctctctctionsishib agoib ago ago ago ago ago ago ago ago at ago ago ago ago you ago your ago you yourself your your your ago you You you through your he
Postible causes & remedies:
Machine cause
◇ molded-in stresses
Remedies: Reduce Packing and Fill Rates by Adjusting Until the Part is Properly Filled with Minimum Stresses. Maintain a holding pres more the primary inject.
◇ COOLING TIME TOO Short
MOULD CAUSE
◇ Undercuts or PARTING LINE BURS
◇ INSUFFICIENT DRAFT Allowance
PROBLEMS, The Product Designer Should Be Made Aware of this requirement.
◇ Use of mold release
Remedies: The Remedy is to keep the Mold as Clean As Posses and Make Every Effort to Eliminate the Use of External Mold Releases.
◇ Improper Ejector Design
over a large area.
Material cause
◇ DEGRADED MI properial
◇ Excessive moisture
have a DEW POINT of -20 to -40 Degrees F.
Operator cause
◇ POOR HOUSEKEEPING
Importance of MainTaining Consistent Cycles.