Tool Design Checklist
Material Flow
Nonrestrictive sprue
Balanced cooling
Runner system
Cold slug wells
No sharp corners in runner system
Gradual size changes
Balanced runner system
No sharp corners in part
Adequate venting
Refer to
part design checklist
for additional items
Nonrestrictive gating
Acceptable location of weld lines
Cooling
High thermal conductivity sprue bushing
Balanced cooling
Nonrestrictive coolant lines
Turbulent flow rate
(use Eastman flow rate calculator program)
Adequate clearance for coolant lines through tool
Adequate cooling for thick part walls
Ejection
Adequate stroke
Lifter release
Adequate draft
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