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Process for manufacturing thermoplastic components for golf balls

A golf ball, thermoplastic technology, applied in the field of manufacturing golf balls, can solve the problems of raw material loss, large quantities, etc.

Inactive Publication Date: 2007-07-25
EI DU PONT DE NEMOURS & CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, molding golf balls by conventional methods creates a large amount of polymer off-cuts, and if the off-cuts cannot be reintroduced into the process, there is a significant loss of raw material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] The definitions herein apply to the terms used throughout this specification, unless otherwise defined in special cases.

[0018] The term "polymer offal" as used herein describes excess thermoplastic resin that: (1) melts or softens sufficiently to be injected through the die and piped to the golf ball mold; (2) does not enter the mold, but acts as The molding material still has the same thermal history; (3) must somehow be cut or removed from the molded core or layer in order to obtain a usable molded ball or ball part.

[0019] The term "(meth)acrylic" as used herein means "acrylic, methacrylic, or a mixture of acrylic and methacrylic" alone or in derivative form. For example, "alkyl (meth)acrylate" as used herein refers to an alkyl acrylate, an alkyl methacrylate, or a mixture of an alkyl acrylate and an alkyl methacrylate.

[0020] The terms "finite amount" and "finite value" mean an amount that is not equal to zero.

[0021] The term "about" means that quantitie...

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Abstract

The present invention describes an injection molding process for manufacturing golf balls using thermoplastic materials. The injection mold is provided with a heating source and one or more valve gates. The heating source maintains the temperature of the molten thermoplastic material in the conduits through which it is delivered to the mold cavity, and the valve gate shuts off the flow of molten thermoplastic material to the mold cavity. Advantageously, this process reduces or eliminates 'trim' or waste material, and thus also minimizes the necessity to recycle thermoplastic material.

Description

[0001] This application claims the benefit of US Provisional Application 60 / 604,332, filed August 25, 2004, which is incorporated herein in its entirety. field of invention [0002] The present invention relates to a method of manufacturing golf balls. Specifically, the present invention relates to a method of molding a golf ball having a thermoplastic center or core, or one or more thermoplastic layers. Background of the invention [0003] Several patents and publications are incorporated in the specification in order to more fully describe the state of the art to which this invention pertains. The entire disclosure of each of these patents and publications is incorporated herein by reference. [0004] Several types of advanced golf balls exist, particularly three-piece, two-piece, and multi-ply balls. "Three-piece" balls typically have a spherical molded center wrapped with elastic strand material, overlaid with a thermoplastic or thermoset material. "Two-piece" balls g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/14A63B37/00B29C45/27
CPCB29C45/2725B29C45/14819B29L2031/545B29C45/14073A63B37/0046A63B37/0078A63B37/0075B29C45/2806B29C45/27A63B45/00A63B37/0087A63B37/0076A63B37/0003A63B37/0041B29C45/26A63B37/00
Inventor K·C·安德森
Owner EI DU PONT DE NEMOURS & CO