Method for manufacturing golf club head with integral inserts

• US 5,524,331 A
• Filed: 08/23/1994
• Issued: 06/11/1996
• Est. Priority Date: 08/23/1994
• Status: Expired due to Term

• Current Assignee: Callaway Golf Company
• Original Assignee: Carlsbad Corp.
• Inventors: Pond, Brian R.
• Primary Examiner(s): Arbes, Carl J.
• Application Number:
  US08/294,384
• Time in Patent Office: 658 Days
• Field of Search: 29/527.4, 264/257, 273/78
• US Class Current: 29/527.4
• 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 53/0416 Heads having an impact surface provided by a face insert
• CPC Class Codes: A63B 53/0425 the face insert comprising two or more different materials
• 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: Y10T 29/49986 Subsequent to metal working

Abstract

A method of manufacturing a golf club head comprising the steps of forming a head body from a metal material and forming a recess within the front face of the head body which extends rearwardly therewithin. The method further comprises the step of casting a curable, non-metal insert within the recess which is consolidated directly into and integral with the head body.

Claims

1. A method of manufacturing a golf club head comprising the steps of:

(a) forming a head body from a metal material, said head body defining a front face;

(b) forming a recess within said front face which extends rearwardly within said head body; and

(c) casting a curable graphite-epoxy composite within said recess, said composite comprising a laminate having a base layer and a top layer.

2. The method of claim 1 further comprising the step of forming recessed score lines within the top layer during the casting of the laminate.

3. The method of claim 1 further comprising the step of removing residual flash from the perimeter of the recess subsequent to the casting of the laminate into the head body.

4. The method of claim 1 wherein step (b) comprises the step of forming the recess to include an arcuate, generally convex inner surface.

5. The method of claim 1 wherein step (c) comprises the steps of:

(1) placing the laminate into the recess; and

(2) curing the laminate within the recess in a manner causing the laminate to be consolidated directly into an integral with the head body.

6. The method of claim 5 wherein step (2) comprises the step of:

placing the head body into a co-curing assembly defining first and second chambers separated by a flexible membrane and including a molding tool movably mounted within said second chamber;

said head body being supported within said second chamber in a manner wherein said molding tool is positioned over said laminate and spaced therefrom.

7. The method of claim 6 wherein step (2) further comprises the steps of:

(i) pulling a vacuum in the first and second chambers while the temperature within the co-curing assembly is at room temperature;

(ii) increasing the pressure in the first chamber to approximately 150 psi while gradually increasing the temperature within the co-curing assembly from room temperature to approximately 250°

F., the pressurization of the first chamber to approximately 150 psi facilitating the movement of the molding tool into direct contact with the laminate;

(iii) increasing the pressure in the second chamber to atmospheric pressure while maintaining the temperature within the co-curing assembly at approximately 250°

F.;

(iv) gradually decreasing the temperature within the co-curing assembly from approximately 250°

F. to room temperature; and

(v) decreasing the pressure in the first chamber to atmospheric pressure while the temperature within the co-curing assembly is at room temperature, the depressurization of the first chamber to atmospheric pressure facilitating the movement of the molding tool out of contact with the laminate.

8. The method of claim 7 wherein:

step (i) is conducted for approximately 10 minutes;

step (ii) is conducted for approximately 60 minutes;

step (iii) is conducted for approximately 120 minutes; and

step (iv) is conducted for approximately 120 minutes.

9. The method of claim 7 wherein said molding tool includes raised score lines formed thereon and step (2) further comprises the step of forming recessed score lines within the top layer of the laminate, said recessed score lines being formed in the top layer when the raised score lines of the molding tool come into direct contact therewith.

10. The method of claim 6 further comprising the step of removing residual flash from the perimeter of the recess subsequent to the curing of the laminate and the removal of the head body from within the co-curing assembly.

11. The method of claim 5 wherein step (b) comprises the step of forming the recess to include an arcuate, generally convex inner surface.

12. The method of claim 11 wherein step (1) further comprises the steps of:

shaping the base layer to conform to the recess;

inserting the base layer into the recess such that said base layer is in direct contact with the inner surface of the recess;

shaping the top layer to conform to the recess; and

inserting the top layer into the recess such that said top layer overlaps and covers said base layer.

13. A method of manufacturing a golf club head comprising the steps of:

(a) forming a head body from a metal material, said head body defining a front face;

(b) forming a recess within said front face which extends rearwardly within said head body, said recess including an arcuate, generally convex inner surface; and

(c) casting a curable non-metal insert within said recess.

14. A method of manufacturing a golf club head comprising the steps of:

(a) forming a head body from a metal material, said head body defining a front face;

(b) forming a recess within said front face which extends rearwardly within said head body;

(c) placing a curable non-metal insert into the recess; and

(d) curing the insert within the recess in a manner causing the insert to be consolidated directly into and integral with the head body, said curing being facilitated by placing the head body into a co-curing assembly defining first and second chambers separated by a flexible membrane and including a molding tool movably mounted within said second chamber, said head body being supported within said second chamber in a manner wherein the molding tool is positioned over said insert and spaced therefrom.

15. A method of manufacturing a gold club head comprising the steps of:

(a) forming a head body from a metal material, said head body defining a front face;

(b) forming a recess within said front face which extends rearwardly within said head body, said recess including an arcuate, generally convex inner surface;

(c) placing a curable graphite-epoxy composite into said recess, said composite comprising a laminate having a base layer and a top layer; and

(d) curing the laminate within the recess in a manner causing the laminate to be consolidated directly into and integral with the head body.