Sleeve Roll Thermal Offset Prevention
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Solution Overview
Problem
Existing sleeve rolls face challenges in efficiently controlling temperature and preventing positional offset during the formation of synthetic resin film sheets, leading to issues like material sticking and pattern transfer difficulties, especially when using rubber rolls, and potential damage from thermal expansion.
Innovation Solution
A sleeve roll design featuring a metallic shaft core with a thermal medium passage, a heat-conductive rubber roll, and a thin metallic sleeve, along with crosswise and rotary offset prevention devices, allowing for rapid temperature control and mechanical repositioning to prevent offset and damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a rubber roll is used for pressure-bonding or rolling, then the flexibility in radial direction is improved and thickness unevenness is reduced, but the heat resistance deteriorates and material sticking occurs at high temperatures
Solution Approach 1:
The invention uses a composite structure combining a metallic shaft core with a rubber roll layer. The metallic core provides heat resistance while the rubber layer provides flexibility and thickness uniformity. This composite material approach resolves the contradiction by integrating the advantages of both materials.
Solution Approach 2:
The rubber roll is nested on the outer periphery of the metallic shaft core, creating a layered structure where each material performs its optimal function. The metallic core is nested inside the rubber layer, allowing thermal management from the interior while maintaining flexible contact with the material being processed.
2Temperature
If a metallic roll is used for pressure-bonding or rolling, then the heat resistance is improved, but the flexibility in radial direction deteriorates and thickness control becomes difficult
Solution Approach 1:
The composite structure of metallic core with rubber coating allows the metallic portion to provide heat resistance while the rubber outer layer provides the necessary flexibility for maintaining thickness uniformity during pressure-bonding operations.
Solution Approach 2:
Different parts of the roll have different properties: the inner metallic core provides thermal stability and structural strength, while the outer rubber layer provides local flexibility and conformability to maintain uniform thickness across the material width.
3Stability of the object's composition
If a rubber layer covers the shaft core part, then the flexibility is improved, but the heat conduction deteriorates and cooling efficiency is reduced
Solution Approach 1:
The invention changes the thermal parameter of the rubber layer by incorporating heat conductive filler particles. This modification maintains the flexibility benefits of rubber while improving its thermal conductivity to enable effective cooling of the metallic core through the rubber layer.
Solution Approach 2:
The rubber layer is formulated as a composite material containing heat conductive filler, creating a multi-functional layer that simultaneously provides flexibility and improved heat conduction for efficient cooling of the shaft core.
4Temperature
If the tubular metallic member expands thermally, then the adaptability to high temperature is improved, but the positional stability deteriorates and offset occurs
Solution Approach 1:
The tension spring mechanism automatically compensates for thermal expansion of the metallic sleeve by allowing it to expand while maintaining positional stability through the elastic restoring force of the spring. The system self-adjusts to temperature changes without external intervention.
Solution Approach 2:
The tension spring acts as an intermediary element between the metallic sleeve and the shaft core, mediating the thermal expansion effects. It allows the sleeve to expand thermally while preventing positional offset through the spring's elastic constraint.
5Manufacturing precision
If the sleeve is fitted tightly on the rubber roll, then the positional accuracy is improved, but the ease of assembly deteriorates
Solution Approach 1:
The invention changes the dimensional parameter of the metallic sleeve by providing a slight clearance fit rather than a tight interference fit. This allows the sleeve to be easily assembled onto the rubber roll while maintaining sufficient positional accuracy during operation through the retaining mechanism.
Solution Approach 2:
The retaining collar acts as an intermediary component that facilitates easy assembly by providing a snap-fit or retained connection, while the tension spring maintains positional accuracy during operation without requiring tight initial fitting.
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 sleeve roll effectively prevents material sticking and ensures accurate pattern transfer by stabilizing temperature and maintaining positional accuracy, even with thermal expansion, thus enhancing the film sheet formation process.
Implementation Method 1
a rubber roll (4) containing a heat conductive material (6) mixed therein, which is provided on the surface of the shaft core part (2)
Implementation Method 2
the high temperature of the material to be formed may cause the tubular metallic member to expand thermally, thus causing the tubular member to expand circumferentially and axially
Implementation Method 3
it cannot be cooled quickly when it is intended to cool the high temperature of the tubular metallic member with the cooling medium from the shaft core part side
Data Source
Figure 1
Figure 2(A)~2(B)
Figure 3
AI summary
The sleeve roll according to the present invention has the metallic sleeve 5 fitted over the rubber roll 4, covering the surface of the shaft core part 2, and can be efficiently heated or cooled by having the passage P formed between the metallic roll inner tube 2a and the metallic roll outer tube 2b for the thermal medium to flow through. It also has the heat conductive material 6 mixed into the rubber roll 4, so that it has excellent heat conductivity and the surface of the sleeve can be quickly and efficiently heated or cooled, thus preventing the material to be formed from sticking to the roll.