Thread Ply Sheathing Device with Independent Pressure Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing methods for manufacturing reinforcement plies for tires face challenges in achieving precise geometry and thickness control due to pressure differences between material flows, leading to geometric irregularities and potential thread displacement during the sheathing process.
Innovation Solution
A sheathing device with independent feed channels and pressure-measuring means connected to a controller ensures equal pressure on both sides of the thread ply, maintaining the thread position and allowing precise control of the total thickness by regulating the pressure of each feed channel, thereby eliminating pressure differences and stabilizing the thread position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If pressure is increased in the coating chamber to improve impregnation, then rubber penetration into threads is improved, but thread displacement perpendicular to the ply surface occurs
Solution Approach 1:
The coating chamber is divided into two independent zones with separate feed channels (first feed channel for upper part, second feed channel for lower part). Each zone can be pressurized independently through its own feed means, allowing differential pressure control to prevent thread displacement while maintaining impregnation quality.
Solution Approach 2:
The invention changes the pressure parameter by introducing independent pressure control for upper and lower material flows. Pressure-measuring means monitor and regulate the pressure of each feed channel separately, enabling precise control of the pressure differential to eliminate thread displacement while maintaining effective impregnation.
2Shape
If tension is increased on the ply to prevent thread displacement, then thread position stability is improved, but thread cutting or damage to the plastic elastomer occurs
Solution Approach 1:
The invention replaces the mechanical tensioning system with a pressure-based control system. Instead of applying mechanical tension to hold threads in place, the system uses regulated material flow pressure from independent feed channels to maintain thread position, thereby avoiding thread cutting or damage to the plastic elastomer.
3Ease of manufacture
If pressure difference between upper and lower material flows is allowed to vary, then total thickness control is simplified, but geometric irregularities in the ply occur
Solution Approach 1:
The invention implements feedback control through pressure-measuring means that monitor the pressure of material flows from both feed channels. The controller uses this feedback information to regulate the feed means, ensuring equal pressure on both sides of the ply and maintaining consistent geometric accuracy while simplifying total thickness control through independent pressure regulation.
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
This solution enables the precise manufacturing of straight-thread plies with consistent thickness and improved geometric accuracy, reducing the risk of thread displacement and enhancing the production of complex tire geometries.
Implementation Method 1
feed means capable of delivering a first material and a second material under pressure and with a defined flow rate
Implementation Method 2
pressure-measuring means, coupled to a controller for controlling the pressure of each of the feed means, and located in the coating chamber facing and in line with each other
Data Source
AI summary
A device for continuously sheathing a ply of threads, said ply being formed by an array of approximately mutually parallel threads. The device includes a thread guide, a coating chamber into which a first feed channel and a second feed channel run, which are independent of each other, connected to a first feed device and to a second feed device respectively and capable of delivering a first material and a second material under pressure and with a defined flow rate, and the outlets of which channels are placed above and below the plane of the ply of threads, and an output die. Pressure-measuring device, connected to a controller for controlling the pressure of each of the feed devices, are placed in the coating chamber facing and in line with each other, on either side of the plane of the ply and in the immediate vicinity of the outlet for the feed channels.