Magnesium alloy shell of golf club head made by die casting
A shell of a golf club head is made of magnesium alloy and is made by die casting. The golf club head has a top portion, a face, a bottom portion, a toe portion, a heel portion and a neck, which is divided into the shell and a face member along a dividing line. The dividing line crosses the highest portion of the top portion, the peak portion of the toe portion, the bottom portion and the peak portion of the heel portion.
1. Field of the Invention
The present invention relates to a golf club, and more particularly to a magnesium alloy shell of a golf club head made by die casting.
2. Description of the Related Art
U.S. Pat. No. 5,494,281 taught a golf club head with a shell made of magnesium alloy and a face made of titanium alloy or ceramic. The magnesium alloy has properties of light in weight, shock absorption and cheaper than titanium alloy. The housing is made by die casting for mass production, but it also has a few drawbacks. To facilitate die release, the shell, as shown in
US Patent Publication No. 20040023731 taught a hollow golf club head, which is divided into a front shell and a rear shell. The rear shell may be made of stainless steel, aluminum, magnesium or the alloy thereof. The patent lacks of disclosing how to divide the golf club head, so that it still doesn't provide the solution.
SUMMARY OF THE INVENTIONThe primary objective of the present invention is to provide a magnesium alloy shell of a golf club head made by die casting, which wall of the shell has a uniform thickness, such that the shell can be made for greater size golf club head.
According to the objectives of the present invention, a shell of a golf club head is made of magnesium alloy and is made by die casting. The golf club head has a top portion, a face, a bottom portion, a toe portion, a heel portion and a neck, which is divided into the shell and a face member along a dividing line to have the shell with a maximum opening.
BRIEF DESCRIPTION OF THE DRAWINGS
As shown in FIGS. 1 to 3, a shell 20 of a golf club head 10 of the preferred embodiment of the present invention, which is made of magnesium alloy and is made by die casting, includes a crown 21, a toe 22, a bottom 23, a heel 24 and a neck 25. The shell 20 is hollow with an opening 26 and a slot 27 around the opening 26.
As shown in
The shell 20 of the present invention has to be bonded with a face member 30, shown as the dot line in FIGS. 4 to 7, to construct the golf club head 10. The face member 30 may be made of titanium alloy, stainless steel or maraging steel and so on, and may be made by casting or forging. In the present invention, the shell 20 is provided with the slot 27 to be engaged with a protrusion 31 on the face member 30, and adhesion, such as epoxy, is added to bond them.
The thickness of the shell 20 of the present invention is thinner and uniform, so that the shell 20 is applied to the big size golf club head. The shell is provided with a weight device 40 at the bottom portion 13 adjacent to the toe portion 14, as shown in
The bottom portion 13 is flatter so that the location of the dividing line 50 on the bottom portion 13 has less effect on the step of releasing mold. In the present invention, the location of the dividing line 50 is adjacent to the face to have a greater area of the bottom portion, so that the bottom portion may provided with trademark, logo or has a predetermined pattern. As shown in
The neck may be molded on the shell as a single element, it also may be an independent element bonded to the shell.
Claims
1. A shell of a golf club head, which is made of magnesium alloy and is made by die casting, wherein the golf club head is a hollow element having a top portion, a face, a bottom portion, a toe portion, a heel portion and a neck, and is divided into the shell and a face member along a dividing line to have the shell with a maximum opening.
2. The shell as defined in claim 1, wherein the neck is molded on the shell as a single element.
3. The shell as defined in claim 1, wherein the neck is an independent element bonded to the shell.
4. The shell as defined in claim 1, wherein the shell has a slot at an edge along the dividing line.
5. The shell as defined in claim 1, wherein the face member is made of titanium alloy.
Type: Application
Filed: Sep 15, 2005
Publication Date: Mar 1, 2007
Inventor: Archer Chen (Taichung)
Application Number: 11/226,208
International Classification: A63B 53/00 (20060101);