Elastic Press Blanket for Cutting Stacked Sheet Materials
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Solution Overview
Problem
Cutting machines for stacked sheet-like materials often cause damage to the uppermost sheets due to uneven pressure distribution, leading to deformation and misalignment during cutting, especially when using rigid press beams on irregular stacks.
Innovation Solution
The elastic element protrudes beyond the press beam on its side facing away from the cutting plane, ensuring it supports the top sheets and maintains alignment with the feed device, preventing damage and ensuring accurate cutting by sticking to the elastic element and returning the sheets to their original position after cutting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a rigid press beam is used to clamp the stack, then the pressing force is sufficient to hold the stack during cutting, but the uppermost sheet becomes damaged due to uneven pressure distribution on irregular stack surfaces
Solution Approach 1:
The patent replaces the rigid press beam with a flexible press blanket that can conform to the irregular surface of the stacked material. The flexible blanket distributes pressure evenly across the entire stack surface, preventing the concentration of force on protruding areas that causes damage to the uppermost sheet, while still providing sufficient overall pressing force to hold the stack during cutting.
Solution Approach 2:
The patent changes the physical state and properties of the pressing element from rigid to flexible. By using a compressible, elastic material for the press blanket, the system can adapt its pressure distribution parameters to match the irregular geometry of the stack, transforming the pressure application from concentrated to distributed while maintaining adequate total force.
2Stability of the object's composition
If the press beam presses the stack, then the stack is clamped for cutting, but the uppermost sheet deforms and moves away from the feed device causing misalignment
Solution Approach 1:
The flexible press blanket conforms to the stack surface without creating localized deformation zones. Its ability to distribute pressure uniformly prevents the uppermost sheet from deforming and shifting away from the feed device, maintaining both stack stability during cutting and precise alignment for subsequent feeding operations.
Solution Approach 2:
The press blanket is designed as a replaceable, consumable component rather than a permanent rigid structure. It can be easily replaced when worn or contaminated, ensuring consistent performance throughout its service life while maintaining alignment precision without requiring complex adjustment mechanisms.
3Device complexity
If a rigid press beam is used, then the structure is simple, but the edges of the press beam require deburring to prevent damage to the material
Solution Approach 1:
The flexible press blanket eliminates the need for rigid structural components with sharp edges. As a soft, conformable material, it inherently lacks the protruding edges that would require deburring operations, simplifying manufacturing while preventing material damage through its gentle, distributed contact surface.
Solution Approach 2:
The press blanket is manufactured as a simple, replaceable component without complex machining requirements. Its elastic nature allows it to be produced through simpler processes like vulcanization or molding, and it can be easily replaced rather than re-machined, reducing overall manufacturing complexity and cost.
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
This design effectively prevents damage to the topmost sheet and ensures precise alignment with the feed device, allowing for defined cutting of the remaining stack, reducing manufacturing costs by avoiding deburring of the press beam edges and maintaining the material's integrity.
Implementation Method 1
a resilient, plate-shaped element (21) which is connected to the press beam (15) for clamping the product when the press beam (15) is lowered between the resilient element (21) and the table (2)
Implementation Method 2
the top sheet or the top sheets of the stack of material to be cut stick to this protruding area of the elastic element
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
The machine has a table for supporting the sheet material (8) on surface (3) of a table (2), and a lowerable press beam that is arranged above the table surface. An elastic plate-shaped portion covers the press beam on the table surface, and the press beam clamps the material between an elastic element (21) and the table. A blade (4) is provided above the table surface and adjacent to the press beam, for cutting the material in cutting plane. A feed unit for to-be-cut material is provided perpendicular to the cutting plane. The elastic element consists of rubber.