Tire Mold Lining Insert Junctions for Smooth Pattern Molding
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Solution Overview
Problem
Existing casting processes for producing tyre mould fittings with complex forms and thin walls result in moulding defects, excess material usage, and reduced tyre performance due to increased tread pattern thickness and discontinuities.
Innovation Solution
Incorporating an insert with a junction that divides the intersection of patterns, allowing for a smooth envelope at the contact surface, minimizing material usage and preventing moulding defects by avoiding excess thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an insert with complex form is used to form projecting patterns with thin walls, then the variety of patterns is improved, but moulding defects occur due to material not being integral and weak retention of the insert
Solution Approach 1:
The patent applies preliminary action by providing excess thickness of material on the strip before the moulding process. This excess material ensures that during over-moulding, there is sufficient material to completely cover the contact surface of the insert, guaranteeing integral material and strong retention of the insert in the fitting element, thereby preventing moulding defects.
2Reliability
If excess thickness of material is provided on the strip to prevent moulding defects, then the retention of the insert is improved, but the tread pattern thickness increases and tyre performance deteriorates
Solution Approach 1:
The patent applies local quality by providing excess thickness of material specifically on the strip only where needed for moulding, rather than uniformly throughout the entire fitting element. This localized excess material ensures complete coverage of the insert contact surface while minimizing the overall material usage and preventing unnecessary increase in tread pattern thickness, thus maintaining tyre performance.
3Manufacturing precision
If excess thickness of material is provided on the strip, then moulding defects are prevented, but material consumption increases
Solution Approach 1:
The patent applies local quality by providing excess thickness of material specifically on the strip only where needed for moulding, rather than uniformly throughout the entire fitting element. This localized excess material ensures complete coverage of the insert contact surface while minimizing the overall material usage and preventing unnecessary increase in tread pattern thickness, thus maintaining tyre performance.
4Adaptability or versatility
If the contact surface between strip and insert is complex in form, then the insert can form complex patterns, but moulding defects occur such as non-integral material and flash
Solution Approach 1:
The patent applies preliminary action by providing excess thickness of material on the strip before the moulding process. This excess material ensures that during over-moulding, there is sufficient material to completely cover the complex contact surface of the insert, guaranteeing integral material and strong retention of the insert, thereby preventing moulding defects such as flash and non-integral material.
Data Source
AI summary
An insert (36) is designed to be incorporated in the composition of a fitting element (24) and to form part of the molding surface (40) of the fitting element, the molding surface comprising at least one intersection (32) of at least a first (42) and a second (44) projecting pattern. The insert comprises a junction (46) which is designed to be joined with a molding element (38) integral with the body (34) of the fitting element, the junction (46) dividing the second pattern (44) into a first (48) and a second (50) part, the insert (36) forming the first pattern (42) and the first part (48) of the second pattern (44), and the molding element (38) forming the second part (50) of the second pattern (44), the junction (46) going away from the intersection (32).