Tire Building Machine Skew Suppression via Support and Pressing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
During tire building, the longitudinal direction end portions of rubber members tend to skew and are difficult to strongly bond due to their floating state, caused by the lack of support between the inner and outer circumferential surfaces of the building drum.
Innovation Solution
A tire building machine with a support section that positions the inner circumferential surfaces of projecting parts at the level of the outer circumferential surface of the inner rubber member and a pressing section that bonds the longitudinal direction end portions together, preventing skew and ensuring strong bonding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the outer circumferential side strip-shaped rubber member is layered on the inner circumferential side strip-shaped rubber member such that it projects in the drum width direction, then the cylindrical shape can be formed, but the bonding position becomes skewed and the members cannot be strongly bonded
Solution Approach 1:
The patent applies preliminary action by positioning and fixing the projecting parts of the outer circumferential side strip-shaped rubber member before the bonding process. The clamping device holds the longitudinal direction end portions of the projecting parts in advance, preventing gravitational deformation and ensuring precise alignment at the bonding position before the actual bonding occurs.
2Ease of manufacture
If the projecting parts are left unsupported, then the layering process is simple, but the projecting parts deform due to gravitational force and cannot be strongly bonded
Solution Approach 1:
The patent introduces a clamping device as an intermediary element between the projecting parts and the bonding process. This clamping device acts as a mediator that temporarily holds the projecting parts in the correct position, counteracting gravitational force and enabling strong bonding without complicating the overall layering process.
3Manufacturing precision
If the inner circumferential surfaces of the projecting parts are supported at the level of the outer circumferential surface of the inner circumferential side strip-shaped rubber member, then skew in bonding position is suppressed, but additional support structure is required
Solution Approach 1:
The clamping device serves multiple functions: it supports the inner circumferential surfaces of the projecting parts at the correct level, prevents gravitational deformation, and maintains alignment during bonding. By combining these functions into a single multi-functional device, the patent achieves precise bonding position alignment without significantly increasing overall device complexity.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The present invention provides a method of building a tire and a tire building machine. When bonding together longitudinal direction end portions 8A of an outer circumferential side strip-shaped rubber member 8 wrapped around a building drum 2 to form a cylindrical shape, inner circumferential surfaces 8a of projecting parts 8c of the longitudinal direction end portions 8A that project in a drum width direction relative to an inner circumferential side strip-shaped rubber member 7 are supported by a support section 4, and the inner circumferential surfaces 8a are positioned at a level of an outer circumferential surface 7b of the inner circumferential side strip-shaped rubber member 7. In this state, the projecting parts 8c are pressed in the drum width direction by a pressing section 5, and the longitudinal direction end portions 8A are bonded together.