Elastomer Cutting Wedge Rake Face Compression
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Solution Overview
Problem
Existing methods for comminuting elastomers, such as shredders with cutting wedges, deform the material due to contact, limiting the minimum thickness of cut slices and thus the achievable specific surface area, which is crucial for efficient dissolution in solvents for adhesive production.
Innovation Solution
A method utilizing a cutting tool with a cutting wedge and rake face that compresses and then cuts the elastomer, distributing force over a larger area to prevent deformation, allowing for thinner slices and increased specific surface area, achieved by moving the cutting wedge with a beveled edge and controlled contact to minimize elastic yielding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a cutting wedge is used to separate slices from elastomer, then the elastomer can be comminuted into slices, but the elastomer deforms and yields to the cutting edge, limiting the minimum thickness of slices to approx. 1.8-2.2 mm
Solution Approach 1:
The elastomer is pre-compressed by the compression roller before reaching the cutting wedge, placing it in a compressed state that prevents elastic yielding during cutting. This preliminary compression action enables the cutting edge to produce thinner slices without the elastomer deforming and giving way to the cutting force.
2Manufacturing precision
If the elastomer is compressed before cutting, then the minimum slice thickness can be reduced, but additional compression equipment is required
Solution Approach 1:
The compression function and cutting function are merged into a single integrated compression-cutter unit. The compression roller is positioned immediately adjacent to the cutting wedge, allowing the elastomer to be compressed and cut in one continuous operation without requiring separate compression and cutting equipment, thereby reducing overall device complexity.
3Productivity
If the cutting edge contacts the elastomer directly, then cutting can occur, but the force is concentrated on a small area causing the elastomer to yield elastically
Solution Approach 1:
The elastomer is pre-compressed by the compression roller before reaching the cutting wedge, placing it in a compressed state that prevents elastic yielding during cutting. This preliminary compression action enables the cutting edge to produce thinner slices without the elastomer deforming and giving way to the cutting force.
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 the production of elastomer slices with significantly reduced thickness, resulting in a larger specific surface area, facilitating quicker dissolution and more efficient adhesive production without the need for a counter-knife, thus enhancing the comminution process.
Implementation Method 1
the elastomer is initially at least partially compressed only by the rake face between the rake face and the base
Implementation Method 2
before the cutting edge cuts through the elastomer by means of wedge cutting
Implementation Method 3
the elastomer being in a state that is elastically rocked up from the base of the flat back of the cutting wedge by the rake face
Implementation Method 4
a higher frictional force is achieved between the cutting wedge and the elastomer due to the larger area. This prevents the elastomer from being able to flexibly move away from the cutting wedge due to expansion effects under the increasing load.
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention relates to a method for disintegrating an elastomer (20), wherein the elastomer (20) is moved across a floor (22) relative to a cutting tool (12) and toward the cutting tool (12), wherein the cutting tool (12) has a cutting wedge (14), which has a cutting edge (30) and a rake face (32) adjacent to the cutting edge (30). After the cutting wedge (14) comes in contact with the elastomer (20), the elastomer (20) is first at least partially compressed only by the rake face (32) between the rake face (32) and the floor (22) before the cutting edge (30) cuts through the elastomer (20). Because of the initially planar compression of the elastomer (20) by means of the rake face (32), an elastic evasive movement of the elastomer (20) is avoided, such that it is possible to cut off significantly thinner pieces from the elastomer (20), and thus the specific surface area of the pieces severed from the elastomer (20) can be increased.