Tire Vulcanization Mold Recess Geometry for Cleaner Demolding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional tire vulcanization molds experience frequent accumulation of dirt and rubber residues in recesses due to their flat inner surfaces and connected bottom and side wall surfaces, leading to increased cleaning frequencies and reduced tire appearance quality.
Innovation Solution
The tire vulcanization mold features recesses with an arc-shaped side wall surface and a bottom projection that projects outward, facilitating easier rubber separation and reducing dirt accumulation, with at least two recesses per mm2, each having a side wall surface and bottom surface that are smoothly connected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional flat-bottomed recesses are used in the mold, then the mold structure is simple, but dirt and rubber residues accumulate frequently in the recesses
Solution Approach 1:
The patent applies curvature by forming an arc-shaped surface that smoothly connects the bottom surface and side wall surface of the recesses, replacing the conventional flat-bottomed design. This curved geometry prevents dirt and rubber residues from accumulating in the recesses, as the smooth transition eliminates sharp corners and flat surfaces where debris can collect. The arc-shaped design maintains ease of manufacture while effectively resolving the dirt accumulation problem.
2Manufacturing precision
If the mold is cleaned frequently to maintain tire appearance quality, then the tire appearance quality is maintained, but the production efficiency decreases
Solution Approach 1:
The arc-shaped recess design enables the mold to maintain its cleaning state automatically through its geometry. The curved surfaces facilitate self-cleaning during the vulcanization process, as rubber residues naturally detach and are removed during demolding. This eliminates the need for frequent manual cleaning interventions, allowing continuous production while maintaining tire appearance quality, thus resolving the contradiction between manufacturing precision and productivity.
3Ease of manufacture
If recesses with sharp corners and flat surfaces are used, then the recesses are easy to manufacture, but rubber separation becomes difficult and dirt accumulates
Solution Approach 1:
The patent implements curvature in the recess design by creating arc-shaped surfaces that smoothly connect the bottom and side walls. This curved geometry facilitates rubber separation during demolding, as the rounded surfaces allow rubber to detach more easily compared to sharp-cornered recesses. The arc-shaped design maintains ease of manufacture through standard machining processes while significantly improving rubber separation and preventing dirt accumulation.
Data Source
AI summary
A tire vulcanization mold includes a molding surface for molding a tire during vulcanization molding. The molding surface can include a first region in which a plurality of recesses for forming a plurality of projections on a surface of the tire can be provided. In the first region, at least two of the recesses can be arranged per mm2. Each of the recesses can include a side wall surface, a bottom surface, and a virtual recess central axis extending in a depth direction of the recess. In a cross-sectional view of the recess including the recess central axis, the bottom surface can include a bottom projection projecting outward in the depth direction, and the side wall surface can include an arc-shaped surface smoothly connected to the bottom surface.