Tire Curing Press Tie Rod Mechanism for Complex Tread Removal
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Solution Overview
Problem
The manufacture of large tires for civil engineering vehicles poses challenges due to their complex tread patterns with numerous fine and deep grooves, making it difficult to remove them from molds efficiently.
Innovation Solution
A tire blank curing press is designed with circumferentially distributed segments and tie rods that are slidably and rotatably mounted, allowing for increased retraction and swinging of segments during mold opening, facilitated by a mechanism where tie rods are connected only to the frame and segments, enabling longer sliding movements and reduced mold removal forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If segments are designed with traditional connection mechanisms to the frame, then the structural stability is maintained, but the retraction path is limited and cannot accommodate complex tread patterns
Solution Approach 1:
The mold is divided into multiple independent segments that can retract individually. Each segment is connected to the frame by a simple tie rod rather than a complex multi-component mechanism, allowing extended retraction paths while maintaining structural integrity through the segmented design.
Solution Approach 2:
The tie rod connection allows segments to dynamically adjust their position during the molding cycle. The segment can retract along a longer path by rotating and sliding on the tie rod, providing the necessary movement freedom for complex tread patterns while keeping the connection mechanism simple.
2Productivity
If segments retract over a longer path to remove complex tread patterns, then the removal efficiency is improved, but the swinging motion increases causing instability
Solution Approach 1:
The segment is designed to perform a controlled sequence of motions: first sliding linearly along the tie rod to achieve retraction, then rotating to clear the tread pattern. This dynamic motion sequence allows long retraction paths while maintaining stability during each phase of the movement.
Solution Approach 2:
The retraction motion is segmented into distinct phases (sliding phase and rotating phase) rather than a single continuous swinging motion. This segmentation of motion allows the segment to maintain stability during the sliding phase while achieving the necessary retraction distance, then rotate cleanly to remove the tread pattern.
3Strength
If multiple connection points are used between tie rod and segment, then the structural strength is improved, but the device complexity and overall dimensions increase
Solution Approach 1:
The complex multi-point connection structure is extracted and replaced with a single tie rod connection point. The tie rod is designed with sufficient strength and appropriate dimensions to handle the loads, eliminating the need for multiple connection points while reducing overall device complexity and dimensions.
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 allows for the efficient removal of large tires with complex tread patterns by increasing the extent of segment retraction and reducing mold removal forces, thereby simplifying the process and minimizing wear and operating forces.
Implementation Method 1
at least one tie rod mounted slidably and rotatably in the opening of the segment
Data Source
AI summary
The curing press for a tire blank includes a frame and a plurality of circumferentially distributed segments which are capable of forming a tread for the tire. Each of the segments has at least one opening. For each segment, at least one tie rod is mounted slidably and rotatably in the opening of the segment on the one hand and hinged to the frame on the other hand. The mounting and hinging form the only connections of the tie rod to elements of the press other than the tie rod.