The following is a good checklist for reviewing Mold Drawings
Preliminary Drawing Checklist Items:
“A” side plan
“B” side plan
Title block is completely filled out on all drawings
Abbreviated BOM with ordering information for the Mold Base and primary Steels
Parting line locations (Acceptable to customer)
Ejector Pin Layout (Acceptable to customer)
Balanced Runner layout
Gate type, and size specified
Side Action types & locations are shown
Concept of Tool operation
“O” & “R” Dimensions noted
Note “Top of mold” & “Operator Side”
Will the tool fit in the correct press size
Knock out Locations
Support pillar layout
* Typically, approval of the Preliminary designs approves our design concept. Customer approval means that we can proceed with the Final Designs, that we can order the necessary materials, and that we can begin rough machining of material. Sometimes, especially on “rush” jobs, customers approve finish machining based on the preliminary design.
Final Drawing Checklist Items:
All Preliminary Mold Drawings Requirements completed
Full Bill of Materials, Base Information, stamping notes, ejector information, special notes
Detailed views of every non-standard component.
Enough views, sections, iso views exist to adequately show part detail
All details are labeled with the detail number, name, material type, number required, Hardness, and surface finish.
Check All water lines for interference, including clearance for jiffy-plugs
Check Guide Pin length and clearance
Spring loads calculated & checked
Drawings appear to be adequately dimensioned
Critical Dimensions are noted
All “fit” areas are specified for each insert, side action, and core.
All draft is specified for cavity area, core pins, ribs, etc.
Check all side action angles and travel
Check for bad steel conditions (sharp edges, thin sections, too little shutoff, too little angle)
A & B Plan assembly views have been compared
All details from the assembly and plan views have been compared to the detail sheets.
All surface finishes are specified
Drawings are checked to the “Mold Info Sheet”.
* Typically, by approving the Final designs the customer certifies that the drawings are dimensionally accurate, that critical areas have been noted, and that we can proceed with final machining, fit, and finishing.