Tire Mold Saw Cut Pattern for Air Discharge
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Solution Overview
Problem
In tire cure molding, air accumulation between the tire molding surface and the tire leads to recess formation on the tire's outer surface, which existing vent holes and saw cut patterns fail to adequately address, risking damage to the tire's appearance and functionality.
Innovation Solution
A tire mold with a specific pattern of groove-like saw cuts, including circumferential, grid-like, and frame-like saw cuts, is used to disperse rubber flow and prevent air accumulation, featuring a grid-like saw cut that surrounds and couples frame-like saw cuts to prevent them from contacting each other, thereby inhibiting recess formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a lot of vent holes are arranged in the tire molding surface, then air discharge efficiency is improved, but the number of rubber projections (spews) increases and outer appearance is damaged
Solution Approach 1:
The invention divides the air discharge function into multiple segments by providing both vent holes and groove-like saw cuts in the tire molding surface. The saw cuts create multiple flow channels that work together with vent holes to discharge air, distributing the air discharge function across multiple structural elements rather than relying solely on numerous vent holes that would create excessive spews.
Solution Approach 2:
The groove-like saw cuts create a porous or channelled structure in the tire molding surface that facilitates air flow and discharge. These grooves act as additional pathways for air to escape, complementing the vent holes and reducing the need for excessive vent holes that would damage appearance.
2Object-affected harmful factors
If groove-like saw cuts are provided in the tire molding surface, then air flow channels are enhanced, but air accumulation still occurs at confluence positions where rubber flows converge
Solution Approach 1:
The invention introduces asymmetric or varied patterns of groove-like saw cuts with different orientations, lengths, and positions. This asymmetry prevents uniform rubber flow convergence at single confluence points, dispersing the rubber flow paths and eliminating the formation of air accumulation zones where symmetric patterns would create concentrated flow convergence.
Solution Approach 2:
The invention adds complexity to the saw cut pattern by incorporating grooves that extend in multiple directions (tire circumferential direction and tire diametrical direction) rather than a single uniform pattern. This multi-dimensional arrangement of grooves creates a more complex rubber flow path network that prevents air accumulation at simple confluence points.
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
The solution effectively disperses air between the tire molding surface and the tire, preventing air accumulation and recess formation on the tire's side surface during the molding process, ensuring a smooth outer appearance and improved tire quality.
Implementation Method 1
the rubber flows into the area 50 of the tire molding surface from both an outside direction and an inside direction in the tire diametrical direction, and the air accumulation tends to be created at a confluence position thereof
Data Source
AI summary
A tire mold is provided with a groove-like saw cut in an area of a tire molding surface which comes into contact with a side surface of a tire. The saw cut comprises a pair of circumferential saw cuts arranged to be spaced in a tire diametrical direction, a grid-like saw cut which is expanded between the pair of circumferential saw cuts, and a plurality of frame-like saw cuts which are dotted between the pair of circumferential saw cuts. The frame-like saw cuts fringe a closed area which is wider than a smooth area defined by the grid-like saw cut. The grid-like saw cut surrounds the frame-like saw cuts to prevent the frame-like saw cuts from coming into contact with each other. The frame-like saw cuts are coupled to each other via the grid-like saw cut.