Multilayer Core Molding Method for Golf Ball Eccentricity Control
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Solution Overview
Problem
Existing multilayer core molding methods for golf balls often result in eccentricity of the inner cores due to misalignment and deformation of outer core materials during the vulcanization process.
Innovation Solution
A multilayer core molding method that integrates the first outer core material with the inner core before arranging it on the molding apparatus, ensuring proper alignment and preventing deformation by vulcanizing the intermediate molded body with the inner core fixed in position, using a specific temperature control and mold configuration to prevent eccentricity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If outer core materials are arranged separately on inner cores and compression-molded, then the molding process can be simplified, but eccentricity occurs in the inner cores due to misalignment and deformation
Solution Approach 1:
The patent combines the inner core and outer core materials into a single integrated molded body before vulcanization. The unvulcanized or semi-vulcanized first outer core material is applied to cover part of the inner core surface, creating a unified structure that prevents misalignment and deformation during subsequent molding processes, thereby eliminating eccentricity while maintaining process simplicity
Solution Approach 2:
The patent performs preliminary integration of the outer core material with the inner core in an unvulcanized or semi-vulcanized state before the final vulcanization process. This preliminary action ensures proper alignment and positioning is established early, preventing deformation during the subsequent vulcanization-molding step and ensuring precise inner core alignment in the final product
2Manufacturing precision
If the intermediate molded body is vulcanization-molded with the first downstream process mold and intermediate plate closed against each other, then eccentricity is prevented, but the device complexity increases
Solution Approach 1:
The patent divides the molding apparatus into distinct functional components: a first downstream process mold for vulcanization-molding, a second downstream process mold for subsequent operations, and an intermediate plate with cavity surface. This segmentation allows each component to perform its specific function optimally while maintaining overall system manageability and precision
Solution Approach 2:
The intermediate plate serves as an intermediary component between the first downstream process mold and the second downstream process mold. It provides a stable base with a cavity surface that receives the intermediate molded body, enabling precise positioning and alignment during vulcanization while facilitating the transfer and subsequent processing of the molded body
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 method effectively prevents eccentricity in the inner cores by ensuring the outer core materials are aligned and securely attached during vulcanization, enhancing the durability and accuracy of the multilayer core formation.
Implementation Method 1
an unvulcanized or semi-vulcanized first outer core material that covers only part of a surface of the inner core and is integrated with the inner core
Implementation Method 2
a first vulcanization step, performed after the intermediate molded body arrangement step, of vulcanization-molding the intermediate molded body until the intermediate molded body is substantially or completely vulcanized
Data Source
AI summary
A multilayer core molding method includes: an upstream process of obtaining an intermediate molded body 33; and a downstream process of performing molding using a downstream process molding apparatus 2, and wherein the downstream process includes: an intermediate molded body arrangement step of arranging the intermediate molded body on the intermediate plate cavity surface or the first downstream process mold cavity surface; and a first vulcanization step, performed after the intermediate molded body arrangement step, of vulcanization-molding the intermediate molded body until it is substantially or completely vulcanized, in a state in which at least the first downstream process mold and the intermediate plate are closed against each other.