JPH08182781A - Composite metal head and manufacture thereof - Google Patents

Abstract

PURPOSE: To enhance molding yield by forming a face plate from a high m.p. metal and molding a casting main body casting a low. m.p. metal into a casting mold so as to integrally bond the same to the face plate. CONSTITUTION: A metal material low in mass and having a high m.p. and high strength, for example, a titanium metal material is formed into a sheet like face plate 40 by a casting machine. A wood club head-shaped metal mold having an opening provided to the bottom surface thereof is connected to the face plate 40 and a wax mold is molded by injection molding using a wax ejector so as to cover the surface of the metal mold. The peripheral edge of the face plate 40 is held on one side surface of the wax mold in a contact state by the peripheral edge of the wax mold. A refractory shell mold is formed using this wax mold and a high temp. metal soln. heavier in mass than the face plate 40 and having an m.p. lower than that of the face plate 40 is cast t be integrally molded.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a golf club head and a method for manufacturing the same, and more particularly to a composite metal head in which two different metals are integrally bonded and a method for manufacturing the same.

[0002]

BACKGROUND OF THE INVENTION Incidentally, as those familiar with golf know, there are several different types of golf club heads, such as wood club heads, iron club heads and putter heads. Modern metal wood club heads are usually cast by the lost wax method, and iron club heads and putter heads are usually cast by the die casting method (Die Cast). However, regardless of whether the lost wax method or the die casting method is used, the molten metal is molded into the club head by the casting means.
I cannot leave the category of "casting". Of the many metallic materials that can be used to cast these club heads, titanium is currently recognized to have the best impact, but since this titanium is quite expensive, the manufacturer
In order to reduce the overall cost, a titanium club head 1 in which only the thin skin portion of the face is covered with a face plate made of titanium as shown in (3) is developed.

In this type of conventional club head 1, as shown in FIG. 9, a main body 10 and a face plate 12 of a titanium plate are separately molded, and then mechanical methods such as tacking, screwing or welding. The face plate 12 is joined to the side surface of the main body 10 by means of, and as is well known by those skilled in the art, the welding means is suitable only for both metals that can be melted with each other, and there is a limitation in the arrangement, and titanium alloy or the like is used. Such dissimilar metals having relatively different melting points cannot be joined by using welding means, and therefore, the main body 10 of the conventional club head 1 cannot be joined.
The face plate 12 and the face plate 12 are often joined by tacking or screwing. As a result, there is a stud or screw gap between the face plate 10 and the main body, which has an effect on the bonding strength due to the concentrated stress. -The club head 1 is likely to cause a problem of reduced product yield.

[0004]

SUMMARY OF THE INVENTION In view of the above-mentioned problems in the conventional composite metal head and the manufacturing method thereof, the present invention is a composite metal head capable of reliably bonding both dissimilar metals closely and improving the molding yield. The purpose is to provide a manufacturing method for the call.

[0005]

In order to achieve the above object, the present invention provides a face plate made of a refractory metal,
A method of forming a mold for molding a body surrounding one surface portion and a peripheral portion of the face plate, and molding a low melting point metal into the mold to form a body integrally combined with the face plate,
A method in which the mold is formed by casting a main body of a club head-shaped hollow casing having a cavity, and the cavity surrounds one surface portion and the peripheral portion of the face plate by the cavity, and the hollow casing of the mold. Is opened, and the core is separated after casting, and then the opening is closed with the same metal plate as the main body. A raised face plate; and a body having a cavity on one side of which the face plate is exposed, and a ring groove formed along the peripheral edge of the face plate for tightly abuttingly sandwiching the convex edge of the face plate. Is configured to manufacture and mold a composite metal head.

Then, a plurality of cutouts are formed at appropriate intervals along the convex edge of the face plate, and the through holes are formed in the area where the area of extension of the convex edge is relatively large. If the face plate is made of titanium and the body is made of copper corresponding to titanium; or if the face plate is made of stainless steel and the body is made of aluminum corresponding to stainless steel preferable.

[0007]

According to the present invention constructed as described above, a face plate is made of a refractory metal, and a mold for forming a body surrounding one surface part and the peripheral part of the face plate is formed, and the mold is formed. An iron club head or a putter club head is made by a method of casting a low melting point metal into a body and molding the body so as to be integrally bonded to the face plate; casting the above mold into a club head-shaped hollow casing body having a cavity. It is formed so that one surface portion and the peripheral portion of the face plate are cast around by the cavity, and the hollow casing of the mold is opened, and after the casting, the core is disassembled and the opening is formed as the main body. Since the wood club head is constructed by the method of closing it with the same metal plate, the composite metal head molded through these manufacturing processes is A face plate and a face plate which are tightly abutted against each other on one side; the face plate is forged so as to form a convex edge on its periphery, and the body has a lower melting point than the face plate. Since the metal solution is cast into a mold and is cooled and solidified to be molded, when the metal solution is condensed and molded into a main body due to the characteristic that it can flow into and fill the voids of the metal solution, the convex edge of the face plate becomes solid. Since the cast body is sandwiched by the main body, that is, the dissimilar metals of the main body and the face plate can be effectively and reliably tightly coupled to each other. The above and other objects, features and advantages of the present invention will become more apparent from the detailed description of the embodiments below with reference to the drawings.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a flow chart of a molding step of a composite metal head of a relatively preferred embodiment of the present invention. As shown in the drawing, the molding step of a wood club head of this embodiment is a face plate molding. Step 3
0, a wax mold and face plate bond molding step 32, a shell mold molding step 34, and a molding and casting step 36; among them, the face plate molding step 30 includes a high-strength metallic material with a low mass and a high melting point (for example, (A metal material such as tin) is formed into a sheet-shaped face plate of an appropriate shape by a casting machine, and the wax mold and face plate combination molding step 32 is a wood club head having an opening on the bottom surface of the molded face plate. -Shaped metal molds are combined and a wax mold is injection molded to cover the surface of the metal mold by a wax ejector, and the face plate periphery is abutted and clamped by the wax mold periphery on one side of the wax mold. To do so. In the shell molding step 34, the refractory mud and sand are alternately coated on the wax mold surface to an appropriate thickness and then dried to form a further refractory shell mold on the wax mold surface. In the product casting step 36, a high temperature metal solution having a lower mass and a lower melting point than that of the face plate (for example, copper Cu or aluminum Al) is poured along the bottom edge of the shell mold so that the metal solution is in the shell mold. Of the wax mold is melted and evaporated, and the wax mold is replaced and cooled and solidified inside the shell mold to mold the body, that is, by utilizing the characteristic that the gap of the metal solution fluid can be filled, When the metal solution is completely cooled and solidified in the main body, the peripheral edge of the face plate can be firmly impinged and held on one side surface of the main body. And the opening so as to close the body 42 and the same metal plate Love head shaped metal mold give away a core from the opening of the bottom surface, and is by dashed shell mold to obtain a composite wood club head.

FIG. 2 is a side sectional view of a wood club head of a comparatively preferred embodiment of the present invention, and FIG. 3 is a front view of a face plate of the wood club head of the embodiment. Referring also to FIG. As shown in the figure, the wood club head 4 cast by the molding step of the present embodiment comprises a face plate 40 and a main body 42 that holds the face plate 40 in one side by collision; Reference numeral 40 denotes a sheet member having an appropriate shape which is cast and molded through the face plate molding step 30. The face plate 40 has a convex edge 400 formed on the periphery thereof.
The surface is slightly raised from the convex edge 400, and a plurality of cutouts 402 are formed at appropriate intervals along the convex edge 400 so that the extended area of the convex edge 400 is relatively large. Drill 404 (shown by the dotted line in FIG. 3). The main body 42 is formed by the wax mold and face plate coupling step 32, the shell mold forming step 34, and the product casting step 36, and has a hollow one side surface provided with a cavity for exposing the face plate. It is a head-shaped member, and a ring groove 420 is formed along the cavity peripheral surface of the main body 42, and the ring groove 420 is formed.
As a result, the convex edge 400 of the face plate 40 is tightly struck and sandwiched.

Then, as described above, the main body 4 of the present embodiment.
Since No. 2 is obtained by subjecting the metal solution to the product casting step 36 and solidified and molded, when the main body 42 is still presenting the metal solution, the fluidity of the molten metal allows it to enter and fill the voids. As a result, the metal solution flows into the through hole 404 in the convex edge of the face plate 40, the metal solution solidifies in the main body 42, and then the convex edge 4 of the face plate 40.
00 together with the connection of the through holes 404, the main body 42
Can be fixed in the ring groove 420. Also,
Notch 402 in convex edge 400 of face plate 40
The intermittent contact state between the convex edge 400 of the entire face plate 40 and the main body 42 is intermittently maintained, and the main body 42 covered by the peripheral edge of the convex edge 400 and the through hole 404 and the notch 402 is cooled and solidified. For example, the frictional resistance due to the tight concavity and convexity is generated, whereby the dissimilar metals of the main body and the face plate 40 are effectively and surely tightly coupled.

FIG. 4 is a molding step flow sheet for another dissimilar metal synthetic iron club head according to another comparatively preferred embodiment of the present invention. The head forming step includes a face plate forming step 50 and a die casting step 52; of which, the face plate forming step 50 is made of a metal material having a low mass and a high melting point and a high strength (such as titanium metal) by a forging machine. In a die-cast molding step 52, the face plate is placed on one side wall inside the iron club head-shaped mold to form a high temperature metal solution having a higher mass and a lower melting point than the face plate. For example copper Cu
Or aluminum Al) is poured into the mold so that the metal solution is completely cooled and solidified to form a main body, and the face plate peripheral edge is tightly covered and sandwiched on one side surface of the main body. After that, the mold is opened, and the dissimilar metal composite iron club head that has been molded is taken out.

FIG. 5 is a side sectional view of a composite metal head according to another comparatively preferred embodiment of the present invention.
FIG. 6 is a front view of the composite metal head of the other comparatively preferred embodiment. Referring also to FIG.
As shown in the figure, the iron club head 6 cast and molded by the molding step of this embodiment includes a face plate 60 and a main body 6 that abuts and holds the face plate 60 on one side surface.
2, including that the face plate 60 is cast and molded by the face plate molding step 50 in the same manner as in the above embodiment.
The difference between the face plates 40 and 60 molded by 50 is only a difference in shape (the shape of the face plate may be the shape of the face plate 70 of the putter club head 7 shown in FIG. 8). The main body 62 is molded by the die-cast molding step 52 of the iron club head-shaped mold so as to have a cavity having an appropriate shape on its side surface (the main body 7 of the putter club head 7 shown in FIG. 7).
2 may be provided) and a ring groove 620 is provided along the edge of the cavity of the main body 62 so that the peripheral edge of the face plate 60 can be abutted and held.

That is, the melting point of the metallic material of the face should be higher than the melting point of the metallic material of the main body under the casting and molding conditions of the composite metal head, whereby the metallic material of the face plate comes into contact with the high temperature metallic liquid solution of the main body. Even if it is not melted even if it is, the joint part of both dissimilar metals can be effectively divided. Also, as can be found from actual manufacturing, the face plate is made of titanium (melting point 1700
C.) material and the body is made of copper (melting point 1100.degree. C.) material, and the face plate is made of stainless steel (melting point 1450.degree. C.) material, and the body is made of aluminum (melting point 1450.degree. Both golf club heads made of 660 ° C. material can impart the most beautiful metallic color sheen effect to the overall golf club head.

[0014]

As described above, the golf club head cast by the method for manufacturing a composite metal head of the present invention has a characteristic that the voids can be filled with the molten metal fluid, so that the metal solution is cooled and solidified. At the same time as forming the main body,
The peripheral edge of the main body cavity tightly abuts the convex edge of the face plate from both sides, so that the dissimilar metals of the main body and the face plate can be firmly joined together, effectively improving the molding quality of the golf club head. Can be made.

[Brief description of drawings]

FIG. 1 is a flowchart of a composite metal wood club head molding step according to an embodiment of the present invention.

FIG. 2 is a side sectional view of the composite metal wood club head according to the embodiment of the present invention.

FIG. 3 is a front view of the composite metal wood club head of FIG.

FIG. 4 is a flow chart of a composite metal iron club head molding step according to another embodiment of the present invention.

FIG. 5 is a side sectional view of an iron club head according to an embodiment of the present invention.

6 is a front view of the iron club head of FIG.

FIG. 7 is a side sectional view of a composite metal putter club head according to another embodiment of the present invention.

FIG. 8 is a front view of the putter club head of FIG.

FIG. 9 is a cross-sectional view of a conventional composite metal head.

[Explanation of symbols]

 40, 60, 70 Face plate 42, 62, 72 Main body 400 Convex edge 402 Cutout 404 Through hole 420 Ring groove

Claims (7)

[Claims] 1. A mold for forming a face plate (60 or 70) from a refractory metal and molding a main body (62 or 72) surrounding one surface portion and the peripheral portion of the face plate (60 or 70). And a low melting point metal is cast into the mold to form a body (62 or 72) integrally bonded to the face plate (60 or 70). 2. The mold is formed by casting a main body (42) of a club head-shaped hollow casing having a cavity, and the cavity is used to cast one surface portion and a peripheral portion of the face plate (40). Claim 1 which becomes round and round
A method for manufacturing the described composite metal head. 3. Opening the hollow casing of the mold,
After casting, remove the core and then open the opening in the main body (42).
3. The same metal plate as described above is used to close it.
The method for manufacturing the composite metal head according to 1. 4. A face plate (40 or 60 or 70) having a convex edge (400) formed on its periphery and having a surface bulging and protruding from said convex edge (400); The face plate (40 or 60 or 70) is provided with a cavity, and the face plate (40 or 6) is formed by a ring groove (420) formed along the periphery of the cavity.
A composite metal head comprising: a main body (42 or 62 or 72) that tightly abuts the convex edge (400) of 0 or 70). 5. The face plate (40 or 60 or 7)
A plurality of cutouts (402) are formed at appropriate intervals along the convex edge (400) of 0), and a through hole (404) is formed in an area where the convex edge (400) has a relatively large extension range area. The composite metal head according to claim 4, wherein the composite metal head is formed as follows. 6. The composite metal head according to claim 1, wherein the face plate is made of titanium and the main body is made of copper corresponding to titanium. 7. The face plate is formed of stainless steel,
The compound metal head according to any one of claims 1 to 3, wherein the main body is made of aluminum corresponding to stainless steel.