Adjustable Blade Web Cutting Device for Width Deviation
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Solution Overview
Problem
Existing material web cutting devices face inefficiencies due to varying material web widths, leading to trimming and waste of material, which increases costs and reduces productivity.
Innovation Solution
A material web cutting device equipped with a position sensor and a blade adjustment arrangement that allows cutting blades to be displaced transversely, ensuring strips are formed within predetermined tolerances without trimming, thereby evenly distributing width deviations across multiple strips.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If trimming cuts are made on outer edges to accommodate width variations, then strip width tolerances are maintained, but material waste increases and productivity decreases
Solution Approach 1:
The cutting device employs dynamically adjustable cutting blades that can be displaced in the transverse direction based on detected web width variations. The position sensor continuously monitors the web edge position, and the controller adjusts blade positions in real-time, allowing the system to adapt to width fluctuations without trimming, thereby maintaining both precision and productivity
Solution Approach 2:
A position sensor detects the actual position of the web edge and provides feedback to the controller. The controller processes this information and adjusts the cutting blade positions accordingly, creating a closed-loop control system that eliminates material waste while maintaining strip width tolerances within specified ranges
2Manufacturing precision
If trimming cuts are made on outer edges to accommodate width variations, then strip width tolerances are maintained, but material waste increases
Solution Approach 1:
The cutting blades are designed to be dynamically repositionable in the transverse direction. When the position sensor detects web width variations, the controller moves the appropriate blades to accommodate the actual web width, eliminating the need for trimming and preventing material waste while maintaining precise strip dimensions
Solution Approach 2:
The system changes the transverse position parameter of the cutting blades based on detected web width variations. By adjusting blade positions rather than removing material, the system maintains strip width tolerances while preserving all available material, directly addressing the contradiction between precision and substance loss
3Manufacturing precision
If more cutting blades are provided to account for width variations, then strip width tolerances are maintained, but device complexity and costs increase
Solution Approach 1:
Rather than adding more static cutting blades, the system uses a dynamic adjustment mechanism that allows existing blades to be repositioned. This reduces device complexity by eliminating redundant blades while maintaining the ability to accommodate web width variations and maintain strip width tolerances through active control
Solution Approach 2:
Each cutting blade is equipped with adjustment capability, allowing it to perform multiple positions and functions. This multi-functionality eliminates the need for additional dedicated trimming blades, reducing overall device complexity while maintaining precision across varying web widths
4Device complexity
If cutting blades are made stationary for simplicity, then device complexity is reduced, but adaptability to width variations is lost
Solution Approach 1:
The cutting blades are designed with adjustable mechanisms that allow them to move in the transverse direction. This dynamic capability enables the system to adapt to web width variations detected by the position sensor, maintaining adaptability while keeping the adjustment mechanism relatively simple through direct actuation
Data Source
Figure 1
Figure 2A~2C
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AI summary
The invention relates to a web cutting device for cutting a web (1) into a plurality of strips (2), comprising a feeder (3) for transporting the web (1) in a longitudinal direction (x), and several cutting blades (4, 4') arranged transversely to the longitudinal direction (x) in a transverse direction (q) at a distance from one another for forming the strips (2). According to the invention, at least one position sensor (7) connected to a control unit is provided, which is configured to determine an edge of the web (1). Furthermore, a blade adjustment arrangement (8) is also connected to the control unit, wherein at least a portion of the cutting blades (4) are displaceable in the transverse direction (q) by the blade adjustment arrangement (8). The invention also relates to a method for forming a plurality of strips (2).