Two-Layer Punching Die for Hot Stamping Complex Geometries
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Solution Overview
Problem
Existing hot stamping dies are inflexible and unable to effectively stamp objects with complex geometries due to their lack of deformability and adaptability.
Innovation Solution
A die comprising a first layer with a hardness less than 50 shore A and a thickness greater than 20 mm, and a second layer with a hardness greater than 50 shore A and a thickness less than 5 mm, allowing for flexibility and heat retention while adapting to complex object shapes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a typical die with metal base layer and silicone printing layer is used, then heat transfer and pattern definition are improved, but flexibility and adaptability to complex geometries deteriorate
Solution Approach 1:
The patent changes the hardness parameter of the base layer from typical metal (very hard) to rubber/elastic material (soft, <50 shore A), which fundamentally alters the die's mechanical properties to enable flexibility while maintaining pattern definition through the harder printing layer
Solution Approach 2:
The patent uses a composite structure combining a soft rubber/elastic base layer with a harder printing layer, where each material contributes its specific properties: flexibility from the base layer and pattern definition from the printing layer, creating a synergistic effect
2Adaptability or versatility
If the base layer is made softer to increase flexibility, then adaptability to complex geometries is improved, but structural strength and durability deteriorate
Solution Approach 1:
The composite structure allows the soft base layer to provide flexibility while the harder printing layer provides structural strength and durability, with each layer performing its specific function optimally
Solution Approach 2:
The die is segmented into two functional layers with distinct properties: the base layer handles flexibility and adaptation, while the printing layer handles strength and pattern definition, allowing each to be optimized independently
3Use of energy by moving object
If the printing layer is made thinner to reduce heat insulation, then heat transfer efficiency is improved, but pattern integrity and pressure distribution deteriorate
Solution Approach 1:
The patent optimizes the printing layer thickness parameter to a specific range (0.1-5mm) and adjusts its hardness (>50 shore A) to balance heat transfer efficiency with pattern integrity and pressure distribution
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
Enables hot stamping on objects with complex geometries by ensuring pattern integrity and heat distribution, while maintaining flexibility and adaptability.
Implementation Method 1
the first layer, which has a hardness of less than 50 shore A measured according to the ASTM D2240 test method, and which is therefore flexible enough to enable the die to deform in order to adapt to said geometry
Implementation Method 2
The die is heated by the heating block and enables a carrier such as a foil, ribbon, etc. to be applied with a certain pressure to the object to be stamped
Data Source
AI summary
A die is provided for printing through a print carrier onto an object in a hot stamping machine. The die comprises a first layer of a first material, hereinafter referred to as the base layer, the hardness of which is less than 50 shore A measured according to ISO 868 or DIN 53505, and the thickness of which is greater than 20 mm. The die includes a second layer of a second material, hereinafter referred to as the printing layer, the hardness of which is greater than 50 shore A measured according to ISO 868 or DIN 53505, and the thickness of which is less than 5 mm. The second layer is intended to be in contact with the print carrier.