JP2562277B2 - Composite golf club head manufacturing method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a composite golf club head, and more particularly to a composite material golf ball in which a composite material and a metal shell are intimately molded by the expansion pressure of an inflatable bag expanded at an appropriate temperature. Club head manufacturing method.

[0002]

2. Description of the Related Art A conventional golf club head made of a single material is simply provided with the characteristics of the material, and has hardness, flexibility, strength, etc.
These characteristics cannot be given appropriately. Therefore,
Cracks due to impact and wear due to repeated use are likely to occur,
Further, in view of the adverse effect on the ball hitting operation due to the weight imbalance of the head body, in recent years, the club head has been made of different materials according to the characteristics required for each part thereof. For example, the shell is made of hard metal,
The crown is made of relatively lightweight carbon fiber to combine some characteristics with the club head.

As shown in FIG. 4, for example, this type of club head comprises a shell 11, a covering crown 12 and a club face plate 13, and the manufacturing method thereof is performed by the steps shown in FIG. That is, a) Shell molding: molding of the shell 11 includes molding of the head main body 111 and the sole portion 112, the inside is hollow, the upper end is opened with an appropriate width, and the front is a hollow portion. 113 is provided, and a through hole 114 communicating with the hollow portion is formed in the recess 113. A gas blowing tube is inserted into the through hole 114. b) Crown treatment: A covering crown 12 made of a composite material is fitted into the upper end opening of the shell 11 to form a crown, and a skirt portion 121 is formed from the peripheral edge of the covering crown 12.
To a suitable extent on the hollow inner side wall of the shell 11 and extends downward. c) Hot-pressing treatment: High-pressure gas is blown from the gas pipe to seal the coated crown 12 to the opening at the upper end of the shell and to tightly close the skirt portion 121 to the inner peripheral wall of the shell 11, and then to bake. By heating in the furnace, the coated crown 12 is hardened and is firmly joined and molded with the shell 11. d) Adhesion of club face plate: The gas blowing pipe is removed from the through hole 114, and the club face plate 13 is firmly adhered to the recess 113 of the shell 11 to complete the club head, and the head body 111 of the shell 11 is further completed. The golf club is completed by attaching the club shaft to the upper neck portion of the.

[0004]

However, the club head formed by such a manufacturing step has the following drawbacks. 1. When the covering crown 12 is sealed to the upper end opening of the shell 11, high-pressure gas must be supplied from the compressed air machine through the gas injection hole, which increases the cost of the entire equipment and lengthens the molding time. The amount cannot be improved significantly. 2. In order to blow the high-pressure gas, a step of forming a through hole 114 on the front surface of the shell 11 is required, and the through hole 114 is sealed by sticking and adhering the club face plate 13, but the through hole 114 is formed in the shell 11. The formation of the above causes a problem in strength, which adversely affects the strength of the entire club head.

The present invention has been made in order to solve the above-mentioned problems, in which an expanded air bag is placed inside the shell and the expanded pressure of the expanded air bag causes the covering crown and the lining to be closely bonded to the shell. With the above, it is an object of the present invention to provide a method for manufacturing a composite golf club head, which can shorten the manufacturing time, reduce the number of steps, and improve the strength of the entire club head.

[0006]

SUMMARY OF THE INVENTION The present invention is a method of manufacturing a composite golf club head comprising a club face (21), a head body (22) and a sole portion (23), which is made of an appropriate metal material. The upper part of the shell (20) is formed with an opening of an appropriate size that communicates with the hollow inside (24) of the shell (20), and the hollow inside of the shell (20) is provided above the side edge of the head body (22).
A through hole (25) communicating with (24) is provided, a carbon fiber reinforced composite material lining (30) is attached to the inner peripheral wall of the shell (20), and sodium nitrite (NaNO ₂ ) and ammonium chloride (NH ₄ Cl) are added. A stretchable rubber inflation bag (40) containing a mixture of water and water (H ₂ O) is housed in the hollow interior (24) and a carbon fiber reinforced composite material coated crown (50) is placed in the opening. The club head rough material forming step of sealing and heating the club head rough material to an appropriate temperature with a heating device, and the mixture of sodium nitrite, ammonium chloride and water in the expansion bag (40) is The reaction formula NaNO ₂ + NH ₄ Cl + H ₂ O → NaCl + N ₂ + 3H ₂ O causes a chemical reaction, and the generated nitrogen gas and water expand the expansion bag (40).
The lining (30) and the covering crown (50) are tightly joined to the inner peripheral wall and the upper end surface of the shell (20), and the covering crown (50) is heat-cured and closely joined to the shell (20) to form a club head. Forming a hot pressing step.

[0007]

According to the above-mentioned manufacturing method, a lining of carbon fiber reinforced composite material is attached to the inside of the hollow of the shell, and then sodium nitrite (NaNO ₂ ) and ammonium chloride (NH _{4) are used.}
Cl) and water (H ₂ O) mixture is placed in the hollow interior, and then a carbon fiber reinforced composite material coated crown is sealed in the shell opening to form a club head. After forming the rough material, the club head rough material is heated to an appropriate temperature by a heating device to cause a chemical reaction in the mixture of sodium nitrite, ammonium chloride and water in the inflation bag, which causes The inflatable bag is inflated with nitrogen gas and water, and the inflation pressure at this time tightly joins the lining and the coated crown to the inner peripheral wall and the upper end surface of the shell, and the coated crown is thermoset to tightly join with the shell. Since the club head is formed by this, there is no need to cut through holes for blowing high-pressure gas into the hollow interior, unlike the conventional manufacturing method, which improves the strength of the product. Can also, it is not necessary equipment such as compressed air motor can be reduced the cost to the overall facility, further can increase the production volume considerably by shortening the molding time.

According to a second aspect of the present invention, the heating device is a baking furnace, and the baking temperature is 140 ° C to 160 ° C.
As a result, the above-mentioned chemical reaction is caused to inflate the inflatable air bag, and as described in claim 3, the inflatable air bag thus inflated is scratched with a blade tool to If the residual chemical reaction product is discharged from the through hole provided in the shell and then the shaft is inserted and joined to the through hole, the golf club can be completed efficiently.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT The composite golf club head manufacturing method of the present invention, as shown in FIG. 1 showing a comparatively excellent embodiment thereof, is a shell mainly made of a suitable metal material.
(20), lining (30), inflatable bladder (40) and covered crown (50), as shown in FIG. 2, the manufacturing steps thereof are performed in the following order.

A) Rough material molding: The club face (21), the head body (22) and the sole portion (23) are formed on the shell (20).
A hollow inside (24), and an opening of an appropriate size is provided at the upper end of the hollow body (24).
A through hole (25) communicating with the hollow inside (24) of the shell (22) is provided in the upper part of the side end of (22). Furthermore, the hollow interior (24)
Carbon Fiber Reinforced Composite Lining on the Side Walls (30)
After sticking together, the expansion bag (40) made of a highly elastic rubber material is stored, and the expansion bag (40) is filled with sodium nitrite (NaNO ₂ ) and ammonium chloride (NH ₄ Cl).
And a mixture of water (H ₂ O) and the shell (2
0) Carbon fiber reinforced composite material coated crown on top surface
(50) is sealed to complete a rough molding material for a golf club head.

B) Hot-pressing treatment: The above club head forming rough material is put into a baking furnace, the temperature inside the furnace is set at 140 ° C. to 160 ° C., and sodium nitrite, ammonium chloride and water in the above-mentioned inflatable bag (40). Cause a chemical reaction in the mixture. The reaction formula is as follows. NaNO ₂ + NH ₄ Cl + H ₂ O → NaCl + N ₂ + 3H ₂ O Nitrogen gas or water generated by this reaction expands the inflation bag (40), and the inflation pressure at that time is used to lining (30) and coated crown (50). ) Is attached to the inner peripheral wall and the upper end surface of the shell (20) to be adhered, and at the same time, the coated crown
(50) is thermoset to form a club head in close contact with the shell (20).

C) Golf club formation: Before mounting the shaft on the club head, the expansion bag 40 is scratched through the through hole 25 of the shell 20 with a tool such as a blade, and the expansion bag 40 40) The product remaining after the chemical reaction, sodium chloride, water, and nitrogen gas are discharged from the through hole (25), and then the shaft is inserted into the through hole (25) and joined to complete the golf club. .

When the above is summarized and inductively viewed, the present invention has the following advantages. 1. Not only can all manufacturing processes be performed consistently, and there is no need for equipment for supplying high-pressure gas,
Since the process is also unnecessary, the molding time can be shortened and the cost can be reduced, which is suitable for mass production. 2. Although the shell and the club face plate are integrally formed of the same metal, they may be made of different metals, which enables a wide range of club head designs. 3. Since the completed club head has no holes, it is possible to improve the mechanical strength and provide a club head with uniform characteristics.

[0014]

As described above, according to the present invention, the inflatable air bag is inflated by the chemical reaction of the mixture contained in the inflatable air bag, and the lining and the coated crown are attached to the shell by the sufficient inflation pressure. Therefore, since the molding can be easily performed in a short time, the work efficiency can be improved and the productivity can be increased, and the mechanical strength can be improved by not having the holes. In addition, since a material having characteristics as required can be used for each part of the club head, it is possible to perform a design in which ideal strength is obtained.

[Brief description of drawings]

1 is a composite golf club head of the present invention 1
Exploded perspective view showing an embodiment

FIG. 2 is a view showing a flow of a method for manufacturing a golf club head made of a composite material of the present invention.

FIG. 3 is a sectional view showing an inflatable bag in a shell in a manufacturing step included in the manufacturing method of the present invention.

FIG. 4 is a perspective view of a golf club head manufactured by a conventional manufacturing method.

FIG. 5 is a diagram showing a flow of a conventional manufacturing method.

[Explanation of symbols]

 20 Shell 21 Club Face 22 Head Body 23 Sole Part 24 Hollow Inside 25 Through Hole 30 Lining 40 Inflation Bag 50 Covered Crown

Claims (3)

(57) [Claims] 1. A club face (21) and a head body (2)
A method for manufacturing a composite golf club head comprising 2) and a sole portion (23), wherein the shell (20) made of an appropriate metal material has an appropriate size communicating with the hollow inside (24) of the shell (20). And a through hole (25) communicating with the hollow inside (24) of the shell (20) is provided on the upper side edge of the head body (22), and carbon fiber is provided on the inner peripheral wall of the shell (20). Lining of reinforced composite materials (3
0), and a stretchable rubber-like inflatable bag (40) containing a mixture of sodium nitrite (NaNO ₂ ), ammonium chloride (NH ₄ Cl) and water (H ₂ O) is placed inside the hollow interior (24). A club head rough material molding step in which the carbon fiber reinforced composite material covering crown (50) is sealed in the opening; and the club head rough material is heated to an appropriate temperature by a heating device and the expansion is performed. A mixture of sodium nitrite, ammonium chloride and water in the air bag (40) causes a chemical reaction of the following reaction formula: NaNO ₂ + NH ₄ Cl + H ₂ O → NaCl + N ₂ + 3H ₂ O, and the generated nitrogen gas and water cause the reaction. The inflation bag (40) is inflated, and this inflation pressure causes
The lining (30) and the covering crown (50) are tightly joined to the inner peripheral wall and the upper end surface of the shell (20), and the covering crown (50) is heat-cured to be closely joined to the shell (20) to form a club head. A hot pressing step of forming a composite golf club head comprising: 2. The method of manufacturing a golf club head for a composite material according to claim 1, wherein the heating device is a baking furnace, and the temperature of the baking furnace is 140 ° C. to 160 ° C. 3. The expanded air bag (40) which has been inflated is scratched with a blade tool, and the chemical reaction product remaining in the air bag (40) is passed through a through hole (25) provided in the shell (20). The method of manufacturing a composite golf club head according to claim 1, wherein the golf club is completed by discharging and then inserting and joining the shaft into the through hole (25).