Method for manufacturing composite clubs

Description

FIELD OF THE INVENTION

The present invention relates to a method for manufacturing composite clubs to reduce torsional deformation.

BACKGROUND OF THE INVENTION

Innovated materials have been constantly introduced for club fabrication in order to enable hitting ball to fly a greater distance. One of the approaches is to generate maximum torsion to reduce deformation of the club. However, altering the material often results in excessive torsion during club swinging, and produces too much deformation. Compared with the conventional rigid clubs, although change of club manufacturing method can enhance club swinging effect, it does not provide required torsion. And it does not help much in reducing the torsional deformation. Users have to improve swinging technique to achieve the desired result. It is not effective. On the other hand, conventional clubs made from carbon fibers and glass fibers usually are fabricated by wrapping a solid steel core, then the steel core is removed to form a hollow club tube. The material forming the club tube has to withstand the swinging torsion. Deformation increases and the strength cannot be enhanced.

SUMMARY OF THE INVENTION

In view of the aforesaid disadvantages occurred to the conventional clubs that have a greater torsional deformation and smaller strength, the present invention aims to provide a method for manufacturing composite clubs that can reduce the deformation and increase the strength. The method according to the invention includes forming a base material on a metal tube that has a brushed surface by coating a bonding resin; then covering the entire metal tube surface with a layer of glass fiber fabric or carbon fiber fabric or both; wrapping the fabric on the metal tube with a forming adhesive fabric; heating the wrapped metal tube in a two-stage process; peeling off the forming adhesive fabric; finally fabricating the surface to complete the finished product of the composite club.

The foregoing, as well as additional objects, features and advantages of the invention will be more readily apparent from the following detailed description, which proceeds with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is the manufacturing process flow chart of the present invention.

FIG. 2 is a perspective view of the metal tube of the present invention.

FIG. 3 is a perspective view of the metal tube coating with a bonding resin according to the present invention.

FIG. 4 is a schematic view of the metal tube wrapped with a glass fiber fabric according to the present invention.

FIG. 5A is a schematic view of the metal tube wrapped with a forming adhesive fabric according to the present invention.

FIG. 5B is a cross section taken on line 5B-5B in FIG. 5A.

FIG. 6 is a cross section of another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Please referring to FIG. 1, the method for manufacturing composite clubs according to the invention includes steps as follow:

• • (a) Form base material 40:
    • Prior to manufacturing the golf club, forming a brushed surface 10 on the peripheral surface of a metal tube 1 (referring to FIG. 2);
  • (b) Bonding resin 41:
    • Coating a bonding resin 11 on the brushed surface 10 of the metal tube 1 (referring to FIG. 3);
  • (c) Impregnating fabric 42:
    • Impregnating a layer of resin (not shown in the drawings) on a glass fiber fabric 2 (or carbon fiber fabric 20);
  • (d)—Cover the metal tube 43:
    • Covering the entire surface of the metal tube 1 coated with the base material with the impregnated glass fiber fabric 2 (or carbon fiber fabric 20) (referring to FIG. 4);
  • (e) Wrap the forming adhesive fabric 44:
    • Wrapping the metal tube 1 covered by the glass fiber fabric 2 (or carbon fiber fabric 20) with a forming adhesive fabric 3 to fix the glass fiber fabric 2 (or carbon fiber fabric 20) (referring to FIGS. 5A and 5B);
  • (f) Two-stage heating 45:
    • Heating the metal tube 1 wrapped with the forming adhesive fabric 3 to bond and cure the glass fiber fabric 2 (or carbon fiber fabric 20) on the surface of the metal tube 1; and
  • (g) Fabricate the surface process 46:
    • Removing the forming adhesive fabric 3 from the metal tube 1, and fabricating the surface of the metal tube 1 (such as coating paint) to become a finished club that has a reduced torsional deformation and an enhanced strength.

Refer to FIG. 6 for another embodiment of the invention. It is substantially like the one shown in FIG. 1. The difference is that the metal tube 1 coated with the bonding resin 11 is covered by both the glass fiber fabric 2 and the carbon fiber fabric 20. Then it is wrapped by the forming adhesive fabric 3, and heated in a two-stage heating process to bond the glass fiber fabric 2 and the carbon fiber fabric 20 on the surface of the metal tube 1. Then the forming adhesive fabric 3 is removed and the surface of the metal tube is processed. The finished composite club includes a metal tube 1 wrapped by two layers of fabrics.

By means of the aforesaid method, the resulting gold club has less deformation and a greater strength. It offers significant improvements over the conventional golf clubs.