Tensile Force Control for Tubular Web Cutting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing devices for separating tubular webs into flat webs face challenges in adjusting and maintaining a consistent tensile force, leading to uneven cuts and potential film damage due to variations in tubular width and properties, resulting in production delays and errors.
Innovation Solution
A device equipped with an adjustable pneumatic cylinder and transmission mechanism that allows for precise adjustment and maintenance of tensile force at the blade, ensuring optimal cutting performance regardless of tubular width or properties, using a pneumatic cylinder with compressible air for flexible force adjustment and a transmission mechanism with a rotary disc to enhance precision and range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a rotational spring is used to press the blade against the folding edge, then the blade can be positioned against the folding edge, but the tensile force cannot be adjusted and alters during uncoiling and coiling
Solution Approach 1:
The patent replaces the rotational spring mechanism with a pneumatic cylinder that uses compressed air to apply tensile force to the blade. This substitution allows for adjustable and stable tensile force application, eliminating the hysteresis and adjustment limitations of the mechanical spring system while maintaining the blade's positioning capability against the folding edge.
Solution Approach 2:
The patent introduces a pneumatic cylinder that utilizes compressed air to generate and control the tensile force applied to the blade. The pneumatic system provides adjustable and consistent force application, allowing operators to modify the tensile force according to different tubular web properties while maintaining stable positioning throughout the cutting process.
2Reliability
If the blade is pressed against the folding edge more intensely, then the blade can maintain contact, but the film can be damaged or even rupture
Solution Approach 1:
The patent enables dynamic adjustment of the tensile force parameter applied to the blade through the pneumatic cylinder. Operators can modify the force level based on the specific properties of the tubular web being processed, allowing sufficient contact for stable cutting while avoiding excessive force that would damage or rupture the film. This parameter adjustability resolves the contradiction between contact stability and film protection.
3Ease of operation
If the tensile force at the blade is low, then the blade can move freely, but the blade does not exactly strike the folding edge and the flat web is not cut evenly
Solution Approach 1:
The pneumatic cylinder system allows precise control of the tensile force parameter to achieve optimal cutting performance. By adjusting the force level, the system ensures the blade strikes the folding edge accurately for even cuts while maintaining sufficient freedom of movement to accommodate variations in tubular web properties. This parameter control resolves the contradiction between blade mobility and cutting precision.
4Adaptability or versatility
If the tensile force is adjusted for different tubular widths, then the cutting can be optimized for each width, but the device complexity increases
Solution Approach 1:
The pneumatic cylinder provides a compact and relatively simple mechanism for adjusting tensile force, avoiding the need for complex mechanical adjustment systems. The pneumatic system can be controlled through pressure regulation, providing a user-friendly interface for adapting to different tubular widths without significantly increasing device complexity. This approach maintains adaptability while keeping the adjustment mechanism straightforward.
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
The solution ensures even cuts and reduces production waste by maintaining a consistent tensile force, accommodating variations in tubular properties and widths, thereby improving production efficiency and reliability.
Implementation Method 1
a pneumatic cylinder (33) which serves for adjusting and/or keeping of the tensile force K at the blade (20)
Data Source
AI summary
The invention relates to a Device (10) for separating a tubular web (11) in two flat webs (12, 13) with an adjustable blade (20) for cutting the tubular web (11) and with a pulling device (30) which impinges the blade (20) with a tensile force (K) on a folding edge (14) of the tubular web (11) wherein the pulling device (30) is configured in a way that the tensile force (K) is adjustable depending on the tubular properties of the tubular web (11) and that the tensile force (K) can be mainly kept constant with constant tubular properties independent from the tubular web (11).