Single-Layer Material Web Cutting with Nested Patterns to Reduce Waste
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Solution Overview
Problem
Conventional cutting methods for materials like airbags result in significant material waste due to the need for safety margins and inefficient nesting of cut pieces, especially when cutting multiple layers of material webs simultaneously, leading to increased material consumption and costs.
Innovation Solution
A method for cutting cut pieces arranged in a continuous, single-layer material web where cut pieces and cutting patterns are partially included in repeating sections, allowing for optimized nesting and elimination of safety distances, using a laser cutting device to minimize material waste by calculating the space requirement for different arrangement variants and selecting the most efficient arrangement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple layers of material webs are cut simultaneously with safety margins, then cutting efficiency is improved, but material consumption increases significantly
Solution Approach 1:
The patent applies nesting methods to arrange cut pieces from multiple material layers in a hierarchical manner, where cut pieces from different layers are nested within each other's bounding boxes. This allows maximum utilization of the material web area while maintaining safety margins, significantly reducing material waste compared to conventional non-nested arrangements.
Solution Approach 2:
The patent transitions from two-dimensional cutting patterns to three-dimensional nesting arrangements by stacking cut pieces from multiple material layers vertically. This dimensional change allows cut pieces to occupy overlapping spatial regions in different layers, maximizing material utilization while maintaining the required safety distances between corresponding cut pieces across layers.
2Reliability
If safety distances are added to compensate for slippage between layers, then cutting reliability is improved, but material waste increases
Solution Approach 1:
The patent applies different safety distance requirements to different locations and contexts. Safety distances are selectively applied only where necessary to prevent defects, rather than uniformly across the entire material web. The nesting algorithm optimizes safety distances based on local conditions, reducing unnecessary material waste while maintaining cutting reliability.
Solution Approach 2:
The patent dynamically adjusts safety distance parameters based on material properties, cutting tool characteristics, and layer configuration. By optimizing these parameters rather than using fixed conservative values, the system maintains cutting reliability while minimizing the material consumed by safety margins.
3Ease of manufacture
If conventional nesting methods are used for rectangular sections, then arrangement efficiency is improved, but material waste remains too large
Solution Approach 1:
The patent extends conventional 2D nesting methods to 3D nesting by incorporating the vertical stacking dimension. Cut pieces from multiple material layers are arranged in three-dimensional space, allowing overlapping projections in the horizontal plane while maintaining physical separation in the vertical dimension. This enables significantly higher material utilization compared to traditional planar nesting.
Solution Approach 2:
The patent creates a universal nesting algorithm that handles cut pieces from multiple material layers simultaneously, rather than processing each layer separately. This multi-functional approach optimizes the arrangement of all cut pieces across all layers in an integrated manner, maximizing overall material utilization while maintaining the required safety distances between corresponding cut pieces.
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 approach reduces material consumption by 0.5 to 1% by eliminating unnecessary safety areas and optimizing material usage, achieving substantial cost savings in airbag production and other applications.
Implementation Method 1
The method is preferably used in conjunction with a laser cutting device as a cutting tool
Data Source
AI summary
The invention relates to a method (100) for cutting cut parts (1, 2, 3, 4, 5, 6; 12, 13, 14, 15, 16, 17, 18), wherein the cut parts (1, 2, 3, 4, 5, 6; 12, 13, 14, 15, 16, 17, 18) produce a cutting pattern (7), said method having the following method step: cutting (106) the cut parts (1, 2, 3, 4, 5, 6; 12, 13, 14, 15, 16, 17, 18), wherein the cut parts (1, 2, 3, 4, 5, 6; 12, 13, 14, 15, 16, 17, 18) are arranged in a rectangular, repeating portion (9, 9′) of an endless single ply material web (19), wherein the portion (9) at least one cut part (1, 2, 3, 4, 5, 6; 12, 13, 14, 15, 16, 17, 18) or at least one cutting pattern (7) is contained in part (10, 11). The method additionally comprises a computer program product and a device for cutting by means of a cutting tool.