Bidirectional Pressure Roll Discs for Tire Building Drum
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Solution Overview
Problem
Existing pressure rolls for tire building drums can only actively control pressure force in one direction, limiting the ability to individually adjust pressure on tire layers, as actuators are not coupled to the interior parts of the discs and can only displace them in one direction.
Innovation Solution
A pressure roll design with a shaft and discs where each disc has an interior part non-rotatably supported on the shaft and an exterior part that is rotatable, equipped with actuators that can move the discs in both the pressing and retraction directions, allowing for independent control of pressure force by coupling the actuators to the interior parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If actuators are not coupled to the interior parts of the discs, then the device complexity is reduced, but the control precision of pressure force in both directions is limited
Solution Approach 1:
The coupling element is received within the recess of the disc's interior part, creating a nested structure where the actuator couples to the disc through the recess. This allows bidirectional force transmission while maintaining a compact design that does not significantly increase overall device complexity.
2Ease of manufacture
If actuators can only displace discs in one direction through abutment, then the manufacturing precision is simplified, but the adaptability of pressure control is reduced
Solution Approach 1:
The coupling element acts as an intermediary between the actuator and the disc's interior part. This intermediary component enables bidirectional force transmission (pushing and pulling) while maintaining a relatively simple manufacturing process for both the actuator and disc components.
3Device complexity
If discs can only be controlled to move in one direction, then the device complexity is reduced, but the productivity of tire layer pressing is limited
Solution Approach 1:
The actuator with the coupling element serves multiple functions: it can push the disc in the pressing direction and pull the disc in the retraction direction. This multi-functionality improves tire layer pressing efficiency by enabling precise control of disc movement in both directions without significantly increasing device complexity.
Data Source
AI summary
Disclosed is a pressure roll and a method for pressing a tire layer on a tire building drum in a pressing direction, wherein the pressure roll includes a shaft and a plurality of discs, wherein each disc has an interior part and an exterior part, wherein each interior part is provided with a recess for receiving the shaft, wherein the recess is larger than the shaft in the pressing direction for allowing movement of the disc with respect to said shaft in the pressing direction, wherein the pressure roll includes for each disc one or more actuators for individually moving the disc, wherein one actuator is arranged for moving the respective disc with respect to the shaft in the pressing direction and the same or another actuator is arranged for moving the respective disc with respect to the shaft in a retraction direction opposite to the pressing direction.