Method for producing a composite golf club head

• US 5,410,798 A
• Filed: 01/06/1994
• Issued: 05/02/1995
• Est. Priority Date: 01/06/1994
• Status: Expired due to Fees

• Current Assignee: Kun-Nan Lo
• Original Assignee: Kun-Nan Lo
• Inventors: Lo, Kun-Nan
• Primary Examiner(s): Arbes, Carl J.
• Application Number:
  US08/178,042
• Time in Patent Office: 481 Days
• Field of Search: 29/527.2, 264/248, 264/241, 264/314, 273/167 H
• US Class Current: 29/527.2
• CPC Class Codes: A63B 2209/023 Long, oriented fibres, e.g. wound filaments, woven fabrics, mats
• CPC Class Codes: A63B 53/04 Heads
• CPC Class Codes: A63B 53/0416 Heads having an impact surface provided by a face insert
• CPC Class Codes: A63B 53/0466 wood-type
• CPC Class Codes: A63B 60/00 Details or accessories of golf clubs, bats, rackets or the like
• CPC Class Codes: B29C 44/184 and inserting the bags into preformed cavities
• CPC Class Codes: Y10T 29/49982 Coating

Abstract

A method for producing a composite golf club head includes the steps of forming a metal hollow casing; disposing a bowl-shaped laminated member in the metal hollow casing; providing an expansible pocket in the bowl-shaped laminated member, the expansible pocket containing a mixture of sodium nitrite, ammonium chloride and water; disposing a sheet of carbon fiber composite material over an open top portion of the metal hollow casing, in order to close the open top portion of the metal hollow casing and the open end of the bowl-shaped laminated member; disposing the metal hollow casing in a mold; and heating the mold to a temperature of 140°-160° C., in order to allow the mixture in the expansible pocket to react and produce nitrogen gas in the expansible pocket, thereby swelling the expansible pocket and forcing the bowl-shaped laminated member to attach to the metal hollow casing, and allowing the sheet of carbon fiber composite material and the bowl-shaped laminated member to harden and connect integrally to each other.

Claims

1. A method for producing a composite golf club head, comprising the steps of:

(1) forming a metal hollow casing which has an outline of a golf club head, said metal hollow casing having a shaft connecting portion, an open top portion, a side wall, and a closed bottom portion which is integrally formed with said side wall;

(2) disposing a bowl-shaped laminated member in said metal hollow casing, said bowl-shaped laminated member being made of a carbon fiber composite material, and being configured to correspondingly abut an internal wall face of said metal hollow casing, and having an open end adjacent to said open top portion of said metal hollow casing;

(3) providing an expansible pocket in said bowl-shaped laminated member, said expansible pocket containing a mixture of sodium nitrite, ammonium chloride and water;

(4) disposing a sheet of carbon fiber composite material over said open top portion of said metal hollow casing in order to close said open top portion of said metal hollow casing and said open end of said bowl-shaped laminated member;

(5) disposing said metal hollow casing in a mold;

(6) heating said mold to a temperature of 140°

-160°

C. in order to allow said mixture in said expansible pocket to react and produce nitrogen gas, thereby swelling said expansible pocket and forcing said bowl-shaped laminated member to attach to said metal hollow casing, and allowing said sheet of carbon fiber composite material and said bowl-shaped laminated member to harden and connect integrally to each other.

2. A method for producing a composite golf club head as claimed in claim 1, further comprising the step of drilling through said shaft connecting portion of said metal hollow casing, through said hardened bowl-shaped laminated member, and through said swelled expansible pocket, in order to allow the product of said reaction to flow out of said metal hollow casing.