Automated Tire Tread Cutting for Casing-Circumference Matching
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Solution Overview
Problem
Conventional tire retreading methods are inefficient and costly due to the use of spray cement, which is subject to regulatory restrictions and adds to production costs, and the manual measurement and cutting of tire treads lead to errors in length and design continuity.
Innovation Solution
A semi-automated tire tread cutting apparatus that integrates casing measurement, tread cutting, and application, allowing for precise alignment and cutting of tire treads to match design and length, eliminating the need for spray cement and improving the continuity of the tread pattern.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If spray cement is used to adhere cushion gum to tire casing, then bonding strength is improved, but production cost and regulatory compliance cost increase
Solution Approach 1:
The patent removes spray cement from the retreading process entirely, extracting the harmful chemical element while maintaining the bonding function through alternative means (mechanical interlocking and friction during curing). This eliminates regulatory compliance costs and chemical handling requirements while reducing production costs associated with cement application equipment and materials.
Solution Approach 2:
The patent replaces expensive, regulated spray cement with a simpler, disposable bonding approach using cushion gum that is applied in a cost-effective manner and cured without complex equipment. The bonding mechanism relies on the natural properties of the rubber materials rather than costly chemical additives.
2Ease of manufacture
If manual measurement and cutting of tire tread is performed, then equipment cost is reduced, but measurement precision and length accuracy deteriorate
Solution Approach 1:
The patent replaces manual mechanical measurement and cutting with an automated cutting element that precisely determines and cuts the tread length based on measured casing circumference. This substitution maintains equipment simplicity while dramatically improving measurement precision through standardized, repeatable cutting based on accurate circumference measurement.
Solution Approach 2:
The patent uses changes in the parameter of tread length calculation based on measured casing circumference to determine the exact cutting point. By base the cutting length on the measured circumference parameter, the system achieves high precision without complex equipment, using mathematical calculation rather than complex mechanical measurement devices.
3Device complexity
If tread is cut to length before application, then manufacturing simplicity is improved, but design continuity and splice matching deteriorate
Solution Approach 1:
The patent applies the tread to the casing before cutting it to final length. This preliminary application allows the tread to be positioned and secured while still flexible, and then cut to the precise length needed for continuous design matching. The cutting element can then accurately determine where to cut based on the measured circumference, ensuring perfect splice matching without complicating the manufacturing process.
4Manufacturing precision
If automated tread cutting apparatus is implemented, then manufacturing precision and design continuity are improved, but device complexity increases
Solution Approach 1:
The patent combines multiple functions into a single integrated apparatus: the cutting element serves as both a cutting device and a measurement reference point, the tread dispenser integrates with the cutting mechanism, and the casing measurement system works directly with the cutting element. This merging of functions achieves high precision tread alignment and cutting while avoiding the complexity of multiple separate devices.
Data Source
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AI summary
Disclosed herein, a tire tread cutting apparatus for cutting a length of a tire tread is described. The tire tread cutting apparatus includes a track having a first track end and a second track end downstream of the first track end. The track includes a plurality of rollers positioned between the first track end and the second track end. The plurality of rollers is configured to facilitate the tire tread along the track. A tire hub is positioned downstream of and adjacent to the second track end. The tire hub is configured to receive a tire casing. The tire casing defines a tire casing circumference along an outer surface of the tire casing. A tread dispenser is positioned upstream of the track and configured to dispense tire tread. The tread dispenser includes a drive roller configured to drive tire tread downstream toward the second track end.