Calculating Counter Die Relief Depth across Laminated Substrate Thickness Variances
Counter die relief depth calculation requires adjusting nominal board caliper for dynamic fiber compression, film stiffness, and moisture regain clearance.
Tooling Procurement Specification
Contract Document
Technical purchasing documents establish binding manufacturing standards and dimensional tolerances for custom die-cutting and embossing tools. A tooling procurement specification defines the precise mechanical and thermal requirements for suppliers fabricating converting tooling. This document governs quality acceptance criteria and tooling performance expectations between packaging converters and toolmakers.
It stops applying to standard, off-the-shelf press replacement parts that require no custom machining.
Technical Parameters
Unclear tooling requirements lead to misaligned dies, excessive press make-ready times, and premature tool failure during production. Incorporating a detailed tooling procurement specification ensures toolmakers utilize appropriate steel or brass grades, relief depths, draft angles, and plate backing thicknesses. Procurement specifications mandate exact CAD file formats and thermal expansion factors tailored to specific press models.
Specifying surface hardness treatments like chrome plating or titanium nitride coating extends tool life for abrasive paperboard stocks. Clear technical parameters eliminate disputes regarding tool performance during initial press sign-off.
Inspection Protocol
Receiving inspection protocols verify tool dimensions against original CAD drawings using optical measurement systems before press installation. Out-of-spec dimensions identified under a tooling procurement specification allow immediate rejection and re-machining prior to scheduling press time. Rigorous incoming inspection prevents costly press downtime caused by defective tooling arriving at converter facilities.