Cord Fabric Jointing Holder for Continuous Calender Line Supply
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing methods for fabricating topping sheets using cord fabric in tire carcass plys face inefficiencies due to the need to stop the calendar line for jointing operations, leading to waste and reduced fabrication efficiency, as the weft in the fabric does not effectively reinforce the tire and can cause uniformity and separation failures.
Innovation Solution
A method and apparatus for jointing cord fabric using a jointing holder with locking pins to hold the start end portion of the cord fabric in a stretched state, allowing for continuous supply from two positions by interposing unvulcanized jointing rubber to join the finish end portion with the start end portion without stopping the calendar line, using press members to secure the joint.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If two pieces of carriages are installed at two supply positions to supply cord fabric continuously alternately, then the waste margin of cord fabric is reduced and fabrication efficiency is improved, but it becomes necessary to joint the start end portion of one cord fabric to the finish end portion of another, requiring stopping the calendar line and complicating the operation
Solution Approach 1:
A jointing holder is introduced as an intermediary device to facilitate the jointing operation. The holder temporarily holds the cord fabric in a stretched state, allowing the jointing of finish end portion and start end portion to be performed easily without stopping the calendar line, thus resolving the contradiction between improved productivity and operational complexity
Solution Approach 2:
The jointing holder performs preliminary action by holding the start end portion of cord fabric in advance in a stretched state, preparing it for jointing before the actual jointing operation occurs. This preliminary preparation simplifies the subsequent jointing process and eliminates the need to stop the calendar line
2Ease of manufacture
If the calendar line is stopped to joint the cord fabric, then the jointing operation can be performed, but the driving stop time period is prolonged and fabrication efficiency is reduced
Solution Approach 1:
The jointing holder enables the jointing operation to be performed without stopping the calendar line, maintaining the continuity of useful action. The holder temporarily holds the cord fabric while the jointing of finish end portion and start end portion is performed, allowing the calendar line to continue operating and thus preventing loss of fabrication efficiency
3Reliability
If the cord fabric is held in a stretched state during jointing, then the jointing can be performed firmly, but additional holding devices are required
Solution Approach 1:
The jointing holder serves multiple functions: it holds the cord fabric in a stretched state, facilitates the jointing operation, and can be easily removed after jointing. This multi-functionality resolves the contradiction by providing reliable holding without adding excessive device complexity, as the same device performs multiple tasks in the jointing process
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
Enables continuous and efficient supply of cord fabric from two positions without stopping the calendar line, improving fabrication efficiency and ensuring stable jointing of the cord fabric, thereby enhancing the reinforcement and durability of the topping sheet.
Implementation Method 1
pasting an unvulcanized jointing rubber member to the start end portion, and when a final end of the cord fabric on one side comes closer, a finish end portion of the cord fabric on the one side is pasted to a start point of the cord fabric on other side held by the holder of the jointing mounting portion by interposing the jointing rubber member
Implementation Method 2
the finish end portion and the start end portion are jointed by way of the rubber member by being squeezed from upper and lower sides
Data Source
AI summary
A method of jointing a cord fabric when the cord fabric for topping is alternately drawn from two supply positions for continuous supply. During drawing to supply of the cord fabric on one side, a start end portion of the cord fabric on other side is locked to hold by a locking pin of a jointing holder, and is set to a jointing mounting portion in a state where an unvulcanized jointing rubber member is pasted thereto. When a final end of the cord fabric on the one side comes closer, a finish end portion thereof is pasted to the start end portion of the cord fabric held by the holder by interposing the rubber member therebetween. The finish end portion and the start end portion are squeezed for joint from upper and lower sides by press members, thereafter, the holder is removed, and the cord fabric on the other side is drawn to supply continuously to the cord fabric on the one side.