Movable Fabric Cutting Frame for Long Straight Cuts
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Solution Overview
Problem
Existing cutting devices for large fabric displays are cumbersome and time-consuming due to the need for frequent repositioning and size limitations, often requiring manual cutting methods like scissors or hot knife cutters, especially for fabrics exceeding 1.5-2 meters in size.
Innovation Solution
A cutting device with a displacement member allowing transverse and rotational movement in a plane parallel to the fabric, equipped with suction cups and roller balls for secure positioning and a cutting head with pneumatic and electrical drive systems, enabling unrestricted long cuts without fabric repositioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a cutting table with fixedly mounted cutting frame is used, then the cutting device is stable and easy to operate, but the fabric must be repositioned between successive cuts which is time-consuming and cumbersome
Solution Approach 1:
Instead of moving the fabric under a fixed cutting frame, the patent inverts the approach by making the cutting frame movable relative to the fabric. The cutting head can be displaced along the fabric length, eliminating the need to reposition the fabric between cuts and significantly reducing operation time.
Solution Approach 2:
The cutting frame is transformed from a fixed structure to a dynamic one capable of movement along the fabric. The cutting head is equipped with displacement mechanisms allowing it to move longitudinally along the fabric while maintaining cutting precision, enabling continuous cutting without fabric repositioning.
2Ease of operation
If a cutting table allowing XY-movement of cutting head is used, then repositioning is easier, but the cutting table size still restricts the maximum fabric area that can be cut
Solution Approach 1:
The cutting system is segmented into a movable cutting head unit that can operate independently along the fabric length. This segmentation allows the cutting function to be decoupled from a large fixed table structure, enabling cutting of fabrics larger than the table dimensions by moving the cutting head along the extended fabric.
Solution Approach 2:
The cutting capability is extended from two-dimensional table-bound movement to three-dimensional operation where the cutting head can move along the fabric in one dimension while the fabric itself can be extended in other dimensions. This allows cutting of very long fabric pieces that exceed the table's physical dimensions.
3Adaptability or versatility
If a large cutting table capable of handling maximum fabric size is used, then unrestricted cutting is possible, but the investment cost is very high which few manufacturers can afford
Solution Approach 1:
The essential cutting function is extracted from the large fixed table structure and placed in a movable, compact cutting head unit. This extraction allows the cutting capability to be achieved with a much smaller, more affordable device that can still handle large fabric areas by moving the cutting head along the fabric rather than requiring a proportionally large table.
Solution Approach 2:
The patent employs a simpler, more affordable cutting head design that can be replaced or moved as needed, rather than investing in an expensive, large-scale fixed cutting table. This approach uses cheaper components that achieve the same functional result through a different operational methodology.
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
Facilitates easy handling and simplifies the cutting process by allowing continuous cutting without repositioning the fabric, improving efficiency and reducing manual labor, especially for large fabric areas.
Implementation Method 1
a plurality of suction cups (11, 12a and 12b), being arranged on an underside of the ruler (4) and on undersides of the end elements (5a, 5b)
Implementation Method 2
a plurality of roller balls (14, 15a and 15b), being arranged on an underside of the ruler (4) and on undersides of the end elements (5a, 5b)
Data Source
Figure 1~3
Figure 4~5
Figure 6
AI summary
Cutting device, arranged for cutting straight cuts along a cutting line (AB) in a planar, extended blank (3) , said cutting device having fixing members for fixing the cutting device to the blank before a cut, cutting members, having a straight ruler and a cutting head (9) for making the cut, and displacement members, being arranged for enabling displacement of the cutting device across the blank between two successive cuts. The displacement members allow transverse displacement as well as rotation of the cutting device in a plane being parallel to the plane of the blank.