Negative Pressure Roll Loop Take-Up for Damage-Free Slitter Lines
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Solution Overview
Problem
Existing loop absorption apparatuses for slitter lines cannot sufficiently absorb long loops without damaging metal strips, leading to inefficiencies and surface damage, especially with thin materials like metal foil.
Innovation Solution
A loop amount absorption apparatus featuring a negative pressure roll with conduction holes and grooves, a non-woven fabric outer layer low in breathability, and an up-down moving device to adjust the roll's position, allowing for effective gripping and conveying of strips without surface damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a deep loop pit is provided to absorb long loops, then loop absorption capacity is improved, but facility cost increases and production efficiency decreases
Solution Approach 1:
A guide roller is introduced as an intermediary device between the loop pit and the winding machine. The guide roller actively manages loop absorption by rotating and guiding strips, allowing loops to be absorbed in a controlled manner without requiring an excessively deep pit. This mediator enables the system to handle long loops while maintaining production continuity.
Solution Approach 2:
The guide roller is designed to rotate dynamically, with its rotation driven by the tension and flow of strips. This dynamic mechanism allows the system to adapt to varying loop lengths and absorption requirements in real-time, improving both loop absorption capacity and production efficiency compared to static pit structures.
2Quantity of substance
If a deep loop pit is provided to absorb long loops, then loop absorption capacity is improved, but facility cost increases
Solution Approach 1:
The guide roller serves as a mechanical intermediary that replaces the need for an extremely deep pit structure. By using the guide roller's rotation and guidance capability, the system achieves equivalent or superior loop absorption with a shallower, more cost-effective pit design.
Solution Approach 2:
The passive mechanical structure of a deep pit is replaced with an active mechanical system involving the guide roller. This substitution transforms the approach from structural depth to mechanical function, reducing facility construction costs while maintaining absorption capacity.
3Quantity of substance
If strips are conveyed through a loop pit, then loop absorption is achieved, but strip surface is damaged
Solution Approach 1:
The guide roller acts as a mediator that lifts and guides strips through the loop absorption process. By maintaining strip elevation and controlling contact points, the guide roller prevents strips from contacting the pit bottom or rough surfaces, thereby avoiding surface damage while achieving effective loop absorption.
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 apparatus efficiently absorbs long loops while minimizing damage to metal strips, enhancing production efficiency and reducing facility costs by allowing deeper loop absorption without the need for extensive pit depths.
Implementation Method 1
a conduction hole is provided inside the rotating body and in which, in use, a negative pressure is formed by a predetermined suction device
Data Source
Figure 1
Figure 2
Figure 3(a)~3(b)
AI summary
An absorption apparatus 1 that is an example of a loop amount absorption apparatus of a slitter line to which the present invention is applied is disposed in a region of a loop pit 3 provided in the slitter line 2. The absorption apparatus 1 includes a negative pressure roll 9 that grips and conveys strips and an up-down moving device 10 that enables the negative pressure roll 9 to move up and down. By gripping and conveying the strips 14 by the negative pressure roll 9, two loops 15 of the strips are formed. The negative pressure roll 9 includes a rotating shaft 16, an inner cylinder 17, an intermediate cylinder 18, and a non-woven fabric laminated outer layer 19.