Concave Die Stamping Multilayer Sheets
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Stamping multilayer sheets with metal and softer material layers often results in adhesive build-up and flatness issues due to pressure applied by flat die components, causing softer materials to be forced out and compromising the cut part's flatness tolerance.
Innovation Solution
A method using a die component with a concave leading surface that applies maximum pressure to the sheet, preventing softer materials from being forced out and ensuring improved flatness of cut parts, particularly with elastomer or viscoelastic materials and metal layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a flat male die component is used to stamp multilayer sheets, then the cutting action is effective, but the softer material layers are forced out causing adhesive build-up and flatness issues
Solution Approach 1:
The male die component features a concave leading surface instead of a flat surface. This curvature concentrates pressure at the perimeter during stamping, preventing softer material layers from being forced out while maintaining effective cutting action, thus resolving the flatness tolerance issue without sacrificing productivity
2Productivity
If pressure is applied by a flat die component to cut the sheet, then the cutting action is achieved, but adhesive build-up occurs in the stamping die
Solution Approach 1:
The concave leading surface geometry redirects pressure distribution during stamping, concentrating force at the perimeter rather than uniformly across the surface. This prevents softer adhesive or elastomer layers from being extruded into the die cavity, eliminating adhesive build-up while preserving cutting effectiveness
3Device complexity
If a flat die component is used, then the stamping process is simple, but the softer material is compressed and forced out of the cut part
Solution Approach 1:
The concave leading surface provides a geometric solution that contains softer material layers during compression. The curved perimeter acts as a containment boundary, preventing material extrusion while maintaining a relatively simple single-piece die component structure
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The concave die component effectively cuts parts with improved flatness from multilayer sheets by distributing pressure evenly, preventing adhesive build-up and maintaining specified flatness tolerances.
Implementation Method 1
the perimeter of the leading surface applies maximum pressure to the sheet when the sheet is punctured
Data Source
AI summary
A method includes providing a sheet having layers characterized by different softnesses, providing a die component having a leading surface that is generally concave, and causing the leading surface to puncture the sheet thereby to cut a part from the sheet. The method provides improved flatness of parts cut from sheets having layers of varying softness and prevents soft material from exiting the sheet because the peripheral edge of the leading surface applies maximum pressure to the sheet during the puncturing step.