Tire Member Supply Device Positioning Accuracy
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Solution Overview
Problem
The existing method for supplying tire-constituting members to a molding drum results in contraction-deformation and inaccurate winding due to longer time for the front end portion to be wound after cutting, leading to significant positional deviations and deformation.
Innovation Solution
A device with first and second holding means, along with detection and control units, to accurately position and hold the tire-constituting member cut to a predetermined length, detecting deviations and restoring it to reference positions before winding around the molding drum.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the tire-constituting member is cut to a predetermined length and supplied to the front side of the molding drum using the related art method, then the manufacturing process can proceed, but the front end portion undergoes significant contraction-deformation due to longer time exposure, resulting in inaccurate winding around the molding drum
Solution Approach 1:
The detection means detects the position of the front end portion before the tire-constituting member is wound around the molding drum, and the control unit calculates the deviation amount in advance. The first holding means then positions the front end portion at the reference position before winding occurs, preventing contraction-deformation from causing positioning errors.
Solution Approach 2:
The detection means provides real-time position information of the front end portion to the control unit, which calculates the deviation amount and adjusts the first holding means accordingly. This closed-loop feedback system ensures the front end portion is accurately positioned at the reference position despite any contraction-deformation that may occur during the supply process.
2Manufacturing precision
If the tire-constituting member is held and positioned using detection means and control units, then positioning accuracy is improved, but the device complexity increases
Solution Approach 1:
The patent replaces complex mechanical positioning mechanisms with a detection means (optical or sensor-based) and control unit system. Instead of using intricate mechanical adjustments and fixtures to achieve precise positioning, the system uses detection to measure position and electronic control to actuate the first holding means, simplifying the overall device architecture while improving precision.
3Manufacturing precision
If the first holding means is driven to position the front end portion at the reference position, then positioning accuracy is improved, but the time required for the positioning process increases
Solution Approach 1:
The detection means continuously or periodically monitors the position of the front end portion during the supply process, and the control unit continuously adjusts the first holding means to maintain accurate positioning. This continuous action ensures that positioning is maintained throughout the entire supply process without requiring separate positioning steps, thereby maintaining high productivity while ensuring precision.
Data Source
AI summary
A device for supplying a tire-constituting member includes a placement portion to which a tire-constituting member is supplied from the rear side to be placed on the placement portion, a first holding device to hold the tire-constituting member front end portion and is movable, a second holding device to hold the tire-constituting member rear end portion cut to a predetermined length and is movable, a detection device to detect the front end portion position placed on the placement portion, and a control unit which calculates deviation amounts with respect to preset reference positions of the front end portion according to data from the detection device and drives the first holding device in a state where the rear end portion is held by the second holding device such that the front end portion is positioned at the reference position according to the calculation results.