Tire Component Manufacturing via Drum Transfer and Tension Control
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Solution Overview
Problem
The existing methods for manufacturing tire components by winding sheet-like rubber members around a drum face challenges in perfectly joining the joint portions due to deformation and varying tensile forces, leading to reduced yield rates, especially when the rubber members are stretched and deformed during removal from the winding cylinder.
Innovation Solution
A manufacturing method and device that adheres a sheet-like rubber member to the outer circumferential surface of a drum, using a winding cylinder and a drum drive device to rotate the drum and remove the rubber member while minimizing tensile force, ensuring consistent adhesion and reducing deformation, thereby improving the yield rate of the joint portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple sheet-like rubber members are wound around a single winding means, then the manufacturing efficiency is improved, but the joint portions cannot be perfectly joined due to varying tensile forces and deformation
Solution Approach 1:
The invention divides the winding process into two separate stages: first winding each sheet-like rubber member individually on its own winding means to prevent deformation, then transferring and joining them on the drum. This segmentation resolves the contradiction by maintaining precision in the first stage and efficiency in the second stage.
Solution Approach 2:
The sheet-like rubber members are preliminarily wound and fixed on individual winding means before being transferred to the drum. This preliminary action ensures that the members are pre-positioned correctly and prevented from deformation during the subsequent joining process, thereby maintaining joint portion precision while enabling efficient batch production.
2Ease of manufacture
If the sheet-like rubber member is removed from the winding cylinder and wound around the drum, then the tire component can be formed, but the rubber member is stretched and deformed by tensile force
Solution Approach 1:
The invention introduces a transfer mechanism as an intermediary between the winding cylinder and the drum. This intermediary carefully removes the rubber member from the winding cylinder and positions it on the drum without applying excessive tensile force, thereby preventing deformation while still enabling tire component formation.
Solution Approach 2:
The invention employs dynamic control of the removal and winding process, adjusting the speed and tension dynamically during transfer. By controlling the removal speed and maintaining appropriate tension levels, the system prevents stretching and deformation while still achieving the necessary wrapping around the drum for tire component formation.
3Ease of manufacture
If the joint portion is provided in an inclined side with reduced angle, then the sheet-like rubber member can be joined, but the member is more likely to be stretched and deformed
Solution Approach 1:
The invention applies preliminary anti-action by pre-positioning the sheet-like rubber members on individual winding means where their joint portions can be aligned and joined before transfer. This preliminary joining prevents the need for high-precision alignment during the transfer process, counteracting the tendency toward deformation that would otherwise occur with inclined side joining.
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
This approach allows for precise control of the sheet-like rubber member's adhesion, maintaining a constant tensile force and reducing deformation, which enhances the joining process and increases the yield rate of the shaped tire components.
Implementation Method 1
adhering a sheet-like rubber member to an outer circumferential surface of a drum
Data Source
AI summary
A single sheet-like belt 8b, from which a single tire component can be formed, is held on an outer circumferential surface of a winding cylinder 12. The sheet-like rubber member 8b, which is held by the winding cylinder 12, is removed from the winding cylinder 12 by rotation of a drum 22 and adhered to an outer circumferential surface of the drum 22, so as to manufacture a tire component 8c. At the time, the sheet-like belt 8b is moved from the winding cylinder 12 to the drum 22 via a removing roller 14 that is arranged above a common tangent Q between the drum 22 and the winding cylinder 12.