Tire Vulcanizing Mold Side Segments with Intermediary Positioning
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Solution Overview
Problem
The existing tire vulcanizing molds face challenges in accurately providing clearances for air release between the green tire and the side mold, leading to shaping defects due to dimension errors and assembly errors in the side segments, resulting in either excessive rubber spillage or insufficient air release.
Innovation Solution
A tire vulcanizing mold design featuring a side mold main body with recesses and pieces that form the side shaping surface, where the pieces are fitted into the recesses to create accurate clearances for air release, preventing shaping defects by ensuring precise air release and reducing assembly errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If plural side segments are coupled to form the side mold, then the device complexity is reduced and ease of manufacture is improved, but manufacturing precision deteriorates due to accumulated dimension errors and assembly errors
Solution Approach 1:
A positioning protrusion and positioning recess are introduced as intermediary elements to mediate the connection between side segments. The positioning protrusion on one side segment fits into the positioning recess on the adjacent side segment, serving as a precise reference that eliminates cumulative assembly errors while maintaining the modular structure for ease of manufacture.
2Reliability
If clearances are formed on the side shaping surface by using mating surfaces of side segments, then air release function is improved, but manufacturing precision deteriorates making it difficult to accurately provide the clearances
Solution Approach 1:
The positioning protrusion and positioning recess act as intermediary reference elements that enable accurate positioning of side segments. This precise positioning ensures that clearances formed by mating surfaces are consistently accurate, maintaining both the air release function and manufacturing precision.
3Ease of manufacture
If clearances are not accurately provided, then ease of manufacture is improved, but shaping defect occurs causing dent formation or rubber spillage
Solution Approach 1:
The positioning protrusion and positioning recess serve as intermediary reference features that enable accurate clearance formation without complicating the manufacturing process. These positioning elements ensure consistent, defect-free clearances while maintaining the simplicity of modular assembly.
Data Source
AI summary
A tire vulcanizing mold is disclosed capable of accurately providing a clearance, from which air existing between a green tire and a side mold is released, on a side shaping surface and thereby preventing shaping defect. The tire vulcanizing mold includes an upper and lower pair of side molds having side shaping surfaces, each of which shapes a sidewall of a tire. Each of the side molds includes a side mold main body, plural pieces, and a clearance provided between the side mold main body and each of the pieces. The side mold main body includes plural recesses, each of which is closed in a tire circumferential direction and a tire radial direction and is opened to a side shaping surface, at spaced intervals in the tire circumferential direction. Each of the pieces is fitted into the recess and forms the side shaping surface with the side mold main body.