Tire Mold Manufacturing via Original Mold Transfer Process
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Solution Overview
Problem
The conventional method of manufacturing tire molds is inefficient due to the complexity of producing original molds with intricate tread shapes and sipes, leading to deformation and reduced manufacturing efficiency, especially when forming blades and projecting members.
Innovation Solution
A method involving a transfer process where an original mold with a tread shaping part and projections is used to create an intermediate mold, which is then used to form a casting mold with embedded blades, allowing for easier production and attachment of blades to the mold, reducing deformation and improving efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If projecting members are attached to the original mold to form sipes, then the mold can be produced with sipe structures, but the production process becomes complex and time-consuming
Solution Approach 1:
The blade is pre-formed with the sipe groove integrated into its structure before attachment to the original mold. This preliminary formation of the sipe structure eliminates the need for separate projecting members and reduces the complexity of the original mold production process while maintaining sipe formation accuracy
Solution Approach 2:
The sipe groove formation function is merged into the blade structure itself. The blade incorporates both the sipe-forming groove and the attachment structure as a single integrated component, eliminating the need for separate projecting members and simplifying the overall mold production process
2Ease of manufacture
If the same pressing mold and pressure are used for blade and projecting member, then production is simplified, but the projecting member deforms more due to its smaller size
Solution Approach 1:
The blade is pre-formed with appropriate dimensional tolerances and structural features that compensate for the pressing process. The blade's larger size and structural design allow it to withstand the pressing process without excessive deformation, eliminating the need for separate pressing of smaller projecting members
3Manufacturing precision
If multiple projecting members are attached to form multiple sipes, then complete sipe coverage is achieved, but the work required increases significantly
Solution Approach 1:
Multiple sipe grooves are merged into a single blade structure that can form multiple sipes simultaneously. This integrated blade design allows one component to perform the function of multiple projecting members, significantly reducing the number of attachment operations required while maintaining complete sipe coverage
Solution Approach 2:
The blade is pre-configured with multiple grooves at appropriate positions and orientations to form multiple sipes in a single attachment operation. This preliminary configuration eliminates the need for sequential attachment of multiple projecting members, improving production efficiency
4Stability of the object's composition
If blades are cast in the mold for molding tire, then the blade is fixed to the mold, but the projection is likely to be damaged by force applied during tire molding
Solution Approach 1:
The blade is constructed as a composite structure combining a high-strength plate material body with a cast-in portion that integrates with the mold. This composite design provides both the strength to resist molding forces and the stability of a fixed attachment, eliminating the weakness of purely cast projections while maintaining secure fixation
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 method simplifies the production of tire molds by allowing for accurate formation of complex shapes and reduces the time and cost associated with producing original molds, while minimizing deformation and burr generation, thereby enhancing manufacturing efficiency.
Implementation Method 1
a casting mold 30 is molded by the transfer part 23 of the intermediate mold 20, and the mold for molding tire 1 is cast using the casting mold 30
Data Source
Figure 1A~1C
Figure 2A~2C
Figure 3A~3C
AI summary
A mold for molding tire is easily manufactured by easily producing an original mold of the mold for molding tire. The method of manufacturing a mold for molding tire comprises: producing an original mold (2) having a tread shaping part (3) including a tread shape of the tire, producing an intermediate mold having a transfer part to which the tread shaping part (3) of the original mold (2) is transferred, forming a casting mold by the transfer part of the intermediate mold, and casting the mold for molding tire using the casting mold. The original mold (2) is produced by forming a surface part (60) of the tread shaping part (3) and attaching the surface part (60) to a base part (50) of the original mold (2).