Adjustable Cutting Blade Angle for High-Speed Corrugated Web Connections
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Solution Overview
Problem
Existing connecting cut arrangements for corrugated cardboard webs face challenges in reliability, especially at high conveying speeds, often requiring the material web or system to be stopped, and struggle with producing precise connections between longitudinal cuts.
Innovation Solution
A cutting knife adjustable in angle to the material web's conveying direction, capable of making oblique or perpendicular cuts, with a circular knife design and actuation by a motor-driven mechanism, allowing for precise control and independent adjustment of cutting angles to accommodate varying speeds and formats.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a conventional connecting cut arrangement is used, then the system can operate at high conveying speeds, but the reliability deteriorates and the material web or system must be stopped
Solution Approach 1:
The cutting blade is made adjustable in its angle to the material web, allowing dynamic adaptation to different conveying speeds and material conditions. This enables the cutting arrangement to maintain reliability across a wide speed range without stopping the material web, directly resolving the contradiction between high speed operation and operational reliability
2Manufacturing precision
If the cutting blade is fixed at a standard angle, then the device structure is simple, but the manufacturing precision deteriorates when connecting cuts to longitudinal cuts at different angles
Solution Approach 1:
The cutting blade angle is made adjustable relative to the material web conveying direction, enabling precise alignment of connecting cuts with longitudinal cuts at any required angle. This dynamic adjustment capability achieves high manufacturing precision while the adjustment mechanism remains relatively simple in structure
Solution Approach 2:
The angle parameter of the cutting blade is made variable, allowing it to be changed according to the specific cutting requirements. This enables precise control of the connecting cut orientation to match the longitudinal cuts, achieving high manufacturing precision without excessive device complexity
3Productivity
If the cutting blade is adjusted manually, then the device complexity is low, but the productivity deteriorates due to stopping requirements
Solution Approach 1:
Manual adjustment of the cutting blade is replaced with an automatic adjustment system that can change the blade angle without stopping the material web. This substitution enables continuous production and high productivity, with the automatic system managing the complexity of angle adjustments during operation
4Strength
If a large diameter circular blade is used, then the cutting strength is sufficient, but the manufacturing precision of oblique connecting cuts deteriorates
Solution Approach 1:
The cutting blade angle is made dynamically adjustable, allowing optimization of the cutting geometry for different blade diameters and cutting conditions. This enables precise oblique connecting cuts even with larger diameter blades that provide sufficient cutting strength
Solution Approach 2:
The angle parameter of the cutting blade is varied to compensate for the effects of blade diameter on cutting precision. By adjusting the angle, the system achieves high manufacturing precision of oblique connecting cuts while maintaining the cutting strength provided by larger diameter blades
Data Source
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AI summary
The invention relates to a connecting cutting arrangement for generating a connecting cut (54) in a conveyed material web (1). The connecting cutting arrangement comprises at least one knife device (10) with a cutting blade (11) for cutting into the material web (1) and generating a connecting cut (54) in the material web (1). Furthermore, the at least one knife device (10) has an actuable cutting blade angle adjustment device (17) for adjusting the respective cutting blade angle of the cutting blade (11) to the material web (1). The connecting cutting arrangement has at least one presetting unit (18) for actuating the respective cutting blade angle adjustment device (17).