Suction Roll Outer Layer Friction for Uniform Metal Strip Winding
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Solution Overview
Problem
Existing suction roll devices fail to uniformly impart sufficient winding tensile force to metal strips without damaging their surface and struggle to grip and convey a variety of long materials, including thin and narrow strips, due to issues with friction, abrasion, and negative pressure distribution.
Innovation Solution
A suction roll device with a rotating body featuring conduction holes and grooves that develop negative pressure, combined with an outer layer of low breathability and high friction coefficient, allows for uniform and intense frictional engagement with materials, enabling effective gripping, conveying, and winding of long materials without surface damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a suction roll device uses a porous body to grip and convey sheet-like products, then the material can be conveyed without adsorption marks, but the fine holes become clogged with dust and chemicals requiring frequent cleaning
Solution Approach 1:
The patent uses a porous body structure for the suction roll that allows material to be gripped and conveyed without leaving adsorption marks. The porous structure enables selective permeability where the material can pass through while larger particles like dust and chemicals are retained on the surface, reducing clogging and cleaning requirements.
2Force
If existing suction roll devices are used to impart winding tensile force, then some force can be applied, but the force is not uniform across all strip coils and surface damage occurs
Solution Approach 1:
The suction roll device creates a uniform negative pressure field across its entire surface, ensuring that the winding tensile force is distributed evenly across all strip coils. This homogeneous force distribution prevents localized stress concentrations that would cause surface damage or irregular winding.
Solution Approach 2:
The patent employs a pneumatic system generating negative pressure (vacuum) to impart winding tensile force to the metal strips. This pneumatic approach allows for uniform force distribution across the entire strip width without mechanical contact, eliminating surface damage while maintaining consistent tension.
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 device efficiently grips and conveys various long materials, including thin and narrow metal strips, while reliably imparting a uniform winding tensile force, preventing surface damage and maintaining high negative pressure within the system.
Implementation Method 1
a conduction hole which is installed inside the rotating main body and at which a negative pressure is developed by a predetermined suction device
Implementation Method 2
an outer layer portion low in breathability which is formed outside all the conduction grooves and has a friction coefficient higher than a predetermined value
Data Source
Figure 1
Figure 2(a)~2(b)
Figure 3(a)~3(b)
AI summary
The negative pressure roll 1 is provided with a rotating shaft 2, an internal cylinder 3, an intermediate cylinder 4 and a multi-layered non-woven fabric laminated outer layer 5. Further, the rotating shaft 2 is a member at the center of rotation of the negative pressure roll 1 and connected to the internal cylinder 3 by a reinforcement circular disk 9. Still further, the internal cylinder 3 is formed in a tubular shape and rotates together with the rotating shaft 2. In addition, the rotating shaft 2 and the internal cylinder 3 correspond to a rotating main body. Further, the intermediate cylinder 4 is a cylindrical tubular material formed outside the internal cylinder 3 and rotates in association with the rotating shaft 2 and the internal cylinder 3. Still further, themulti-layered non-woven fabric laminated outer layer 5 is formed outside the intermediate cylinder 4 and given as a part at which the negative pressure roll 1 is in contact with the metal strip 13. The multi-layered non-woven fabric laminated outer layer 5 also rotates in association with the rotating shaft 2, the internal cylinder 3 and the intermediate cylinder 4. In addition, the negative pressure roll 1 is provided with a controller 6 for suppressing rotation of the negative pressure roll 1.