Decfects -

Description

Negative

Incomplete pattern with rounded edges where pattern is not completely formed over the core.

Varies

Thin sections and sharp edges often furthest away from the injection sprue.

Misrun

Visual Inspection

Wax viscosity increases until flow stops

Area	Possible Cause	Potential Correction
Equipment	Out of calibration	See Best Practices Section
Equipment	Low injection pressure	Increased inject pressure in small increments
Equipment	High clamp pressure	Reduce clamp pressure. See Best Practices Section.
Equipment	Insufficient shot size	Increase shot size to proper setting
Pattern Die	Core location	Adjust core location pins to assure proper location in die.
Pattern Die	Cold Die	Warm die to promote better wax flow
Pattern Die	Trapped Air	Add vents. If vents exist ensure they are properly cleaned.
Core	Core oversized	Check dimension and contact core supplier.
Other	Cold core	Warm core to promote better wax flow.