Soft Padding Blocks for Low-Noise Multi-Layer Die Cutting
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Solution Overview
Problem
Current die cutting processes using steel blades in clamshell presses require extensive surface preparation, generate high noise levels, consume significant energy, and are limited to single-layer cutting due to high-tonnage force, leading to inefficient operation and hazardous working conditions.
Innovation Solution
A soft die cutting system utilizing soft padding blocks with a steel backing and padding layer, mounted on the fixed platen, which reduces preparation time, noise, and allows for multi-layer cutting by distributing cutting force evenly across a softer surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If steel blades are used in clamshell presses for die cutting, then cutting force is sufficient to cut through work pieces, but surface preparation time increases significantly and noise levels increase
Solution Approach 1:
A pad composed of multiple padding blocks is introduced as an intermediary between the steel blades and the work pieces. The padding blocks absorb impact and distribute cutting force, eliminating the need for extensive surface preparation and reducing noise generated during cutting operations.
Solution Approach 2:
The pad uses composite padding blocks that combine different materials with varying hardness levels. Each padding block contains a harder material core surrounded by a softer material, creating a composite structure that provides both cutting force transmission and noise absorption.
2Adaptability or versatility
If high-tonnage force is applied for single-layer cutting, then clean cuts are achieved, but the press cannot handle multi-layer cutting
Solution Approach 1:
The pad is segmented into multiple individual padding blocks arranged in an array. Each padding block independently supports and distributes the cutting force, allowing the system to handle multiple layers of work pieces simultaneously while maintaining cut quality through the cumulative effect of all padding blocks.
3Duration of action of stationary object
If steel blades directly contact the working surface, then cutting is effective, but blade life is reduced due to wear
Solution Approach 1:
The padding blocks serve as a mediator between the steel blades and the working surface, preventing direct contact and wear. The softer padding material absorbs the wear that would otherwise occur on the expensive steel blades, significantly extending their operational life while maintaining cutting effectiveness.
4Manufacturing precision
If uneven working surface is used, then operation is simpler, but cut quality becomes inconsistent
Solution Approach 1:
Each padding block provides localized compliance and force distribution at its specific position in the array. This local quality approach allows the pad to compensate for unevenness in the working surface, ensuring consistent cut quality across the entire cutting area without requiring the entire surface to be perfectly level.
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
Significantly reduces surface preparation time, noise levels, and increases productivity by up to 60 times, enabling cleaner cuts and multi-layer cutting while prolonging blade life and improving operator safety.
Implementation Method 1
a soft die cutting system that includes a pad mounted on a working surface of the fixed platen. The pad may include a set of soft padding blocks... Each padding block may include a steel backing and a padding layer bonded to the steel backing.
Implementation Method 2
Instead of the hard steel-to-steel die cutting as currently used in clamshell die presses, embodiments of the present disclosure provide a soft die cutting system... The downward force can cause steal blades cutting through the work piece until the blades strike against (i.e., contact with force) the working surface of the fixed platen.
Data Source
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AI summary
A clamshell die press includes a fixed platen, a moving platen installed thereon a cutting blade, and a pad mounted on top of a working surface of the fixed platen, wherein the pad comprises a padding block, wherein the padding block comprises a padding layer composed of a material selected to match a tooth profile of the cutting blade.