Vehicle Tire Sidewall Application on Cambering Drum
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Solution Overview
Problem
Conventional vehicle tire manufacturing methods are complex and limit the feasibility of certain tire constructions, making it difficult to produce special tire designs and optimize the cycle time for manufacturing.
Innovation Solution
A method where the sidewalls are prefabricated and applied directly to the crowning drum, allowing for the production of special tire constructions like C-ply designs, where the carcass insert is wrapped around the bead core in a specific way, and optimizing the cycle time by eliminating the need for a separate sidewall drum and simplifying the process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If sidewalls are wound up on the carcass drum in conventional two-stage processes, then the tire carcass can be built up, but the process becomes complex and certain tire constructions become infeasible
Solution Approach 1:
The patent divides the tire building process into two separate stages: carcass assembly on a simple drum and sidewall application on a different drum. This segmentation allows each drum to have a specialized, simpler structure rather than one complex drum trying to perform all functions
Solution Approach 2:
Instead of applying sidewalls to the carcass on the carcass drum and then moving to the crowning drum, the patent inverts the sequence by applying sidewalls directly to the crowning drum first, then assembling the carcass components around them
2Productivity
If the tire carcass with sidewalls is moved from carcass drum to crowning drum in conventional processes, then the tire can be crowned, but the cycle time is extended and special tire designs are limited
Solution Approach 1:
The patent performs preliminary actions by applying sidewalls directly to the crowning drum before the carcass assembly is completed and transferred. This preliminary positioning of sidewalls eliminates subsequent moving and repositioning steps, reducing cycle time
Solution Approach 2:
The patent enables new tire constructions like C-ply designs by changing the dimensional sequence of operations - applying sidewalls in the axial direction on the crowning drum before radial carcass assembly, rather than the conventional radial then axial sequence
3Ease of manufacture
If a separate sidewall drum is used in conventional processes, then sidewalls can be applied, but the overall cycle time is increased
Solution Approach 1:
The patent merges the sidewall application function with the crowning drum by equipping the crowning drum with raising means that can apply sidewalls directly. This eliminates the need for a separate sidewall drum and the associated transfer operations, reducing cycle time
Data Source
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AI summary
The aim of the invention is to provide a method by which a vehicle tire can be produced in a simple manner, said method comprising the following steps: a) finishing the tire carcass (10) on a carcass drum, wherein no tire structure components in the form of sidewalls (2, 3) are laid on the carcass drum; b) removing the tire carcass (10) from the carcass drum using a carcass transfer unit; c) moving the carcass transfer unit (9) with the tire carcass (10) over a cambering drum (6), wherein during said step the tire structure components in the form of sidewalls (2, 3) are already arranged on the cambering drum (6); d) carrying out a core clamping with segments (7) of the cambering drum (6), wherein the tire sidewalls (2, 3) abutting on the cambering drum (6) via the core clamping are connected to the coaxially positioned tire carcass (10) in the region of the tire bead; e) moving the carcass transfer unit (9) away from the cambering drum (6); f) cambering the tire carcass (10) with the tire sidewalls (2, 3) which are connected on both sides, wherein the tire sidewalls (2, 3) are turned up laterally on the tire carcass (10) by a turning-up means (16), and the tire carcass (10) is combined with the coaxially arranged belt-tread package (14).