Method of producing wood type golf club head

• US 5,306,450 A
• Filed: 08/06/1992
• Issued: 04/26/1994
• Est. Priority Date: 08/13/1991
• Status: Expired due to Term

• Current Assignee: Yokohama Rubber Company Limited
• Original Assignee: Yokohama Rubber Company Limited
• Inventors: Kobayashi, Toshio, Okumoto, Takaharu, Soeda, Heihatiro, Kawada, Kazuo
• Primary Examiner(s): Grieb, William H.
• Assistant Examiner(s): Passaniti, Sebastiano
• Application Number:
  US07/925,263
• Time in Patent Office: 628 Days
• Field of Search: 273/167 R-177A, 273/77 A, 273/DIG. 23, 273/193 R, 273/194 R, 273/194 B, 273/DIG. 3, 273/DIG. 6, 273/DIG. 8, 264/45.4, 264/46.6, 264/328.1, 264/297.2, 264/271.1, 264/275, 264/278, 264/279, 264/279.1, 264/259, 264/DIG. 44, 264/45.1
• US Class Current: 264/45.1
• CPC Class Codes: A63B 2209/02 with reinforcing fibres, e.g. carbon, polyamide fibres
• CPC Class Codes: A63B 53/04 Heads
• 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 44/18 Filling preformed cavities B29C44/1204 takes precedence
• CPC Class Codes: B29C 45/0053 combined with a final operation, e.g. shaping injection-compression moulding B29C45/561
• CPC Class Codes: B29C 45/14065 Positioning or centering articles in the mould
• CPC Class Codes: B29C 45/4421 using expansible or collapsible cores
• CPC Class Codes: B29K 2077/00 Use of PA, i.e. polyamides, e.g. polyesteramides or derivatives thereof, as moulding material
• CPC Class Codes: B29K 2105/12 of short lengths, e.g. chopped filaments, staple fibres or bristles
• CPC Class Codes: B29K 2277/10 Aromatic polyamides [Polyaramides] or derivatives thereof
• CPC Class Codes: B29L 2031/5227 Clubs
• CPC Class Codes: Y10S 273/23 High modulus filaments

Abstract

A method of producing a wood type golf club head which comprises molding and curing integrally an outer shell portion of a head main body having a hollow portion thereinside and equipped with a recess on at least one of the toe, back and heel sides thereof facing the hollow portion, from a synthetic resin as a main material, fixing a weight member having an adjustable weight into the at least one recess, packing a core member into the hollow portion, and fitting a sole plate to a sole portion of the club head.

Claims

1. A method for producing a wood type golf club head having a head main body, said body having an outer shell portion, top and bottom sides, face and back sides and toe and heel sides, a weight member embedded in said body adjacent at least one of said toe, heel and back sides and a sole plate on the bottom side of the body, said method comprising molding and curing the outer shell portion of the head main body from a synthetic resin, with a hollow portion inside thereof accessible from the bottom side of the body and a recess on the inside adjacent at least one of the toe, back and heel sides thereof and facing said hollow portion, inserting a weight member into said hollow portion and fixing the weight member into said at least one recess, packing a core member into said hollow portion, and securing a sole plate to said bottom side of said head main body.

2. The method of claim 1, wherein said synthetic resin contains reinforcing fibers.

3. The method of claim 1, wherein said core member is of a foamable material, the method including foaming said material in place in said hollow portion to form said core member.

4. The method of claim 1, wherein said weight member is made of a resin containing metal particles.

5. A method for producing a wood type golf club head having a head main body, said body having an outer shell portion, top and bottom sides, face and back sides and toe and heel sides, a weight member embedded in said body adjacent at least one of said toe, back and heel sides of said body, and a sole plate on the bottom side of the body, said method comprising securing said weight member to a mold core to form a molding assembly, said weight member being separable from said mold core by sliding the mold core relative to said weight, said weight member having an engageable member on an outer surface thereof, placing said molding assembly inside a mold shaped to form said outer shell portion of said head main body so that a part of the mold core protrudes from said mold in the direction of sliding, molding and curing said outer shell portion in said mold from a synthetic resin by flowing it around said molding assembly so that said weight member is surrounded by and said engageable member of the weight member is integrally locked in said outer shell portion, sliding the mold core relative to the weight member to separate the weight member and the outer shell portion therefrom, said weight member remaining locked in said outer shell portion and said separated mold core leaving a hollow portion in the interior of the body adjacent said weight member accessible from the bottom side of the body, packing a core member into said hollow portion and securing a sole plate to said bottom side of said club head main body.

6. The method of claim 5, wherein said synthetic resin contains reinforcing fibers.

7. The method of claim 5, wherein said core member is of a foamable material, the method including foamable said material in place in said hollow portion to form said core member.

8. The method of claim 5, wherein said weight member is made of a resin containing metal particles.

9. The method of claim 5, wherein the outer shell portion is molded by injecting a fiber reinforced thermoplastic resin into said mold.

10. The method of claim 5, wherein the engageable member on the weight is a slot on the outer surface thereof into which the resin forming the outer shell portion flows as the shell is being molded.