Type of Defect:	Rough Center Hole
Description:	Rough center hole
Observation Method:
Recommendation Upon Observation:
Other Evaluation Method:
Cause	Countermeasure
Insufficient punching condition	Adjust puncher temperature (too low)
Insufficient punching condition	Adjust punching condition (too late in usual)
Insufficient punching condition	Adjust sprue bush temperature (too low)
Insufficient punching condition	Repair puncher

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Teijin Kasei America, Inc.
Tel: (770) 346-8949