JP2000167091A - Metal wood head and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive metal wood head with clear markings, good hitting durability and a greater volume ratio. SOLUTION: A metal wood head 1 of a two-piece, three-piece or four-piece type forged, pressed or molded in lost wax processing has a soil back-face member 3 provided with markings by using a slidable inner die, to which markings designed with characters and/or graphics, at the same time when the soil back-face member 3 is formed in a recess-curved shape.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a metal wood head having a stamp and a method for manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, as a metal wood head,
The sole body is molded separately by the lost wax method on the head body where the crown and hosel of the metal wood head are integrally molded by the lost wax method, and the sole body is fitted to the head body and integrated by welding. As disclosed in Japanese Utility Model Publication No. 61-33970, a face member, a sole member having a divided hosel portion, and a crown member having a divided hosel portion are formed by pressing.
A shaft insertion portion is separately formed, and these members are joined. At this time, an L for reinforcing the sole member and the face member is used.
A so-called four-piece type metal wood head is known in which a metal wood head body is integrated by welding using a U-shaped reinforcing rib and integrated by welding, and furthermore, a shaft tip is attached to the shaft insertion portion and joined and integrated. I have.

As disclosed in Japanese Utility Model Publication No. 61-33972, a face member, a sole member, and a crown member are separately formed by press working, and these members are joined together, integrated, and integrated by welding to form. A so-called three-piece type metal wood head is known in which a shaft tip is mounted on a hosel portion thus formed and bonded and integrated.

Further, recently, a metal wood head made of a titanium alloy or an aluminum alloy having a low specific gravity and a high strength has become a boom.

[0005] Since the metal wood heads made of titanium alloy are lightweight and strong, the volume ratio of the metal wood head body can be made larger than that of a stainless metal wood head formed by the conventional lost wax method. Thus, what is known is a so-called two-piece type metal wood head as disclosed in JP-A-5-317467 and JP-A-6-80455, and methods for manufacturing these metal wood heads.

The two-piece type metal wood head is characterized by a face-side member integrally formed with a face portion, an extending portion extending from the face portion to the rear of the metal wood head, and a hosel portion. The hosel portion is formed by joining a back-side member joined to the back of the member, and the hosel portion is formed by molding a plate-shaped member continuous with the face portion and the extension portion into a tubular shape, and welding the butted portion. It is a thing.

[0007]

However, these conventionally known metal wood heads have the following problems. That is, by the lost wax manufacturing method, the sole member is separately formed by the lost wax manufacturing method on the metal wood head main body in which the crown part and the hosel part of the metal wood head are integrally formed, joined to the metal wood head main body, and welded. Since the integrated product is a cast product, segregation of the molten metal component, pinholes and other defects during casting are liable to occur, and the crystallinity of the deposited metal material is large. Since the mechanical strength is reduced, it is necessary to increase the thickness of the outer shell itself of the metal wood head constituting the metal wood head in order to improve the durability of the metal wood head. For this reason, the weight of the metal wood head is increased, the volume ratio of the metal wood head is reduced, and the sweet spot cannot be enlarged.

Therefore, in order to solve these problems,
A so-called four-piece type metal wood head as disclosed in Japanese Utility Model Publication No. 61-33970 has been known. In these four-piece type metal wood heads, each member is formed by press working. Since the thickness of the outer shell itself constituting the metal wood head can be reduced, there is an advantage that the volume ratio of the metal wood head can be increased.

However, in the case of a metal wood head,
Usually, letters and designs are applied by engraving on the sole plate part, and in these things, the thickness of the outer shell itself is made thin, the stamp is stamped in advance on the plate material for the sole plate and then the mold The method of forging or pressing is generally used, but the probability that cracks will occur from the part where these letters and designs that are thinner even in this thin outer shell are stamped. And the yield of products is significantly reduced.

A so-called three-piece type metal wood head as disclosed in Japanese Utility Model Publication No. 61-33972 is known. In these three-piece type metal wood heads, each member is formed by pressing. As a result, the thickness of the outer shell constituting the metal wood head can be reduced, so that the volume ratio of the metal wood head can be increased.

However, on the other hand, there is a problem that the durability of the ball is reduced due to the reduction in the thickness of the outer shell itself constituting the metal wood head, particularly the reduction in the thickness of the face member and the crown member. Was.

On the other hand, Japanese Patent Application Laid-Open No. Hei 5-317467 and Japanese Utility Model Laid-Open Publication No. Hei 6-80455 aim to improve the durability to hit balls.
As the metal wood head disclosed in No. 2, a part of the forged material is formed into a plate shape, and further bent into a cylindrical shape to form a hosel portion, and the hosel portion is inevitably integrated by welding. Is likely to vary in strength,
Due to the difference in hardness between the welded part and the non-welded part of the hosel part, there was a possibility that the lie angle changed subtly at the part where the hardness of the hosel part was low while repeatedly hitting .

In addition, in these conventional metal wood heads, it is necessary to increase the volume ratio of the metal wood head, so that the thickness of the head shell itself is reduced in all metal wood heads. In the case of applying letters and designs, as described above, in the method of stamping in advance on the plate material for the sole member and then forging or pressing with a mold, cracks occur from the parts where these letters and designs are stamped. There is a problem that the probability of occurrence is high and the product yield is reduced.

In order to avoid this, letters and designs for engraving are preliminarily engraved on the bottom of the lower mold having the concave curved shape forming the sole member, and the upper mold having the convex curved shape is formed. At the time of forging or pressing with the lower die, the plate is plastically deformed at a stroke so as to sandwich a plate material for a sole member, and is stamped with a stamp.

However, in this method, in order to sharply engrave characters or designs to be engraved, it is necessary to perform high pressure during forging or press working, which causes cracks in the upper and lower mold dies. In addition, the stamped part is often damaged, and the repair cost of the mold is high.In addition, the mold itself may be discarded, and the manufacturing cost is high. Had been.

[0016] Therefore, it has been desired to supply a metal wood head having a large volume ratio, in which marking can be performed sharply and ball hitting durability is good, at a low cost.

[0017]

SUMMARY OF THE INVENTION The present invention relates to a metal wood head invented to achieve the above object, and includes a face portion and a crown portion formed by forging, pressing or lost wax. Forged or pressed a sole / back face member that is joined to each of the members that compose the hosel part, and the sidewall part is integrally erected from the sole part from the toe part to the hosel end of the heel part through the back face part. In a metal wood head such as a two-piece type, a three-piece type, or a four-piece type, which is formed by joining and integrating these respective members and welding the joined and integrated portions, the sole / back face member is ,
When the concave inner curved shape of the sole / back face member is formed by the slide-type inner die having an engraved mark formed of a design such as a character or / and a graphic, the engraved mark is simultaneously imprinted. A metal wood head and a method for manufacturing the same.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention relates to a metal wood head invented to achieve the above-mentioned object, and comprises a face portion, a crown portion and a hosel portion formed by forging or lost wax. Joined to each member, from the toe part through the back face part to the hosel end of the heel part, the side wall part is integrally formed from the sole part, and the sole back face member is formed by forging or lost wax manufacturing method, In a metal wood head formed by joining and integrating these respective members and welding the joined and integrated portion, the sole / back face member is engraved with a design such as a character or / and a figure. When the concave inner curved shape of the sole / back face member is formed by the sliding inner die, Is a metal wood head, characterized in that the engraved is embossing.

In the present invention, each of the members constituting the face portion, crown portion and hosel portion formed by forging, pressing, or lost wax production is:
The sole / back face member is made of steel, aluminum alloy, titanium alloy, pure titanium, etc. by forging or pressing. It is a metal wood head characterized by doing.

The metal wood head according to the present invention is characterized by having a two-piece type, a three-piece type and a four-piece type.

Further, as a method of manufacturing a metal wood head according to the present invention, a sole portion is joined to a face portion, a crown portion, and a hosel portion, and a side wall portion extends from a toe portion to a back face portion to a hosel end portion of a heel portion. A two-piece type or a three-piece type in which the sole and back face members, which are integrally erected from one another, are formed by forging or press working, and these members are joined and integrated, and the joined and integrated portions are welded. And a method for manufacturing a four-piece type metal wood head, wherein the sole / back face member is formed in a concave shape of the sole / back face member by a sliding inner die engraved with a design such as a character or / and a figure. When forming the curved shape, the stamp is simultaneously stamped It is a method for producing a metal wood head.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As an embodiment of the present invention, a three-piece type metal wood head 1 will be described as an example.
As shown in FIG. 4 to FIG. 4, each of the members (the face / hosel member 2 and the crown member 5) constituting the face portion 2A, the crown portion 5A, and the hosel portion 6 formed by forging, pressing, or lost wax is used. After joining, the toe 7 passes through the back face 8 and the heel 9
The side wall 3B extends to the hosel end 6A, and the sole 3A
In the metal wood head 1 formed by forging or pressing the sole / back face member 3 that is integrally erected from above, these members are joined and integrated, and the joint 10 is welded. When the sole back face member 3 forms the concave curved shape of the sole back face member 3 by the sliding inner die 11 having the engraved mark 11A made of a design such as a character or / and a figure, The metal wood head 1 is characterized in that the marking portion 4 is stamped. In the metal wood head 1 according to the present invention shown in FIG.
This shows the state temporarily fixed by.

Each member of the face portion 2A, the crown portion 5A, and the hosel portion 6 formed by the forging process, the press process, or the lost wax process is made of a steel material, an aluminum alloy material, a titanium alloy material, or the like. The sole / back face member 3 is a metal wood head 1 formed by forging or pressing a steel material, an aluminum alloy material, a titanium alloy material, a pure titanium material, or the like.

FIG. 4 shows an embodiment of the present invention.
As shown in (a), (b), (c) and FIGS. 5 (d), (e), (f), in the method for manufacturing the metal wood head 1, the sole / back face member 3 made of a plate-like metal material is moved downward. From the toe portion 12A of the mold 12 to the back face portion 12B
Through the hosel end portion 12D of the heel portion 12C, the side wall portion 12E is installed on a lower mold 12 having a concavely curved portion 12 in which an upright portion is provided, and a sole portion 12F of the lower mold 12 has a character And / or a core-type inner die 11 having an engraved mark 11A made of a design such as a figure. The inner die 11 is provided with a lower die along with an upper die 13 and a sole / back face member 3 vertically. 12
The upper die 13 has a slide portion 11B and a locking portion 11C that move up and down in the inside and a suspension 11D structure inside.
In accordance with the approach of the lower die 12 and the inner die 11 and the upper die 13 protruding from the lower die 12, the sole back face member 3 made of a plate-like metal material is sandwiched by the inner die 11 and the upper die 13. A method for manufacturing a metal wood head 1 characterized in that a stamped portion 4 is stamped on a sole portion 3A by a stamp 11A of an inner die 11 at the same time that the stamp 3 is formed into a concave curved shape by forging or pressing. is there.

In the present invention, as shown in FIG. 4A, a portion of the sole portion 12F of the lower mold 12 is cut out,
The inner die 11 has a structure, and a strong leaf spring or a coil spring 11E is disposed as a suspension 11D in the center of the inner die 11, and the inner die 11 slides up and down in the lower mold. At the same time, the locking part 1 is attached to the lower end of the inner die 11.
The formation of 1C allows the inner die 11 to protrude from the lower mold by a required amount and be held.

Further, according to the present invention, FIGS.
As shown in FIG. 5 (f), when the sole / back face member 3 made of a plate-like metal material is forged or pressed, the sole / back face member is sandwiched between the upper die 13 and the inner die 11. Since the center of 3 is compressed and formed into a concave curved shape while sliding, even if the material is hard and has low elongation and poor formability, the stamping position can be prevented from slipping. It is possible to do. That is, as shown in FIG. 4 (b), when forging or pressing the sole / back face member 3 made of a plate-shaped metal material, the sole / back face member 3 is sandwiched between the upper die 13 and the inner die 11, and the sole / back face member 3 is closed. The center of the face member 3 is compressed. As shown in FIG. 4C, the pulling resistance of the sole / back face member 3 made of a plate-like metal material increases from the molding process. Next, FIG.
As shown in (d), in the molding process, since the side wall portion side of the sole / back face member 3 made of a plate-shaped metal material is pulled upward, the sliding inner die 11 must be stamped. For example, the sole / back face member 3 is cut or cracked from the engraved portion.

As described above, in the present invention, unlike the conventional manufacturing method of stamping, when forging or pressing, the inner die 11 is moved together with the slide portion 11B which slides up and down in the lower die. Inner dice 1
By forming a locking portion 11C at the lower end of the inner die 11, the inner die 11 is held in such a manner that the inner die 11 is projected from the sole portion 12F of the concave curved portion 12 of the lower die and held by a required amount, and the inner die 11 has a suspension. As 11D,
By disposing the strong leaf spring or coil spring 11E, the upper die 13 and the inner die 11 are integrated into a sole-back made of a plate-shaped metal material by the force of the strong leaf spring or coil spring 11E. Face member 3
Plastically deforms while sliding while holding strongly, the stress on the mold body is remarkably relieved, and the mold body is not cracked or the engraved portion of the inner die 11 is not damaged. The repair cost can be significantly reduced, and the service life of the mold can be greatly extended.

Further, in the present invention, since the portion of the inner die 11 is exchangeable, the inner die 1
If the stamp of 1 wears out, it is sufficient to replace it with a new inner die 11, and it is possible to reduce the cost of rebuilding the mold, and to replace the part of this inner die 11 even when it becomes a new design letter or design. A new design of metal wood head can be provided simply by replacement, which improves design flexibility.

When the face hosel member 2, the crown member 5, and the sole back face member 3 according to the present invention are formed, the required thickness of each member depends on the thickness.
A material having a shape such as a round bar, a plate, or a rectangle can be formed by forging or pressing, and when the thickness is thin, a thin plate-shaped material is pressed and mass-produced. It is also possible.

The members constituting the face portion 2A, the crown portion 5A, and the hosel portion 6 formed by forging, pressing, or lost wax according to the method of manufacturing the metal wood head are made of steel or aluminum alloy. , A titanium alloy material or the like, and the sole / back face member 3 is formed by forging or pressing a steel material, an aluminum alloy material, a titanium alloy material, a pure titanium material, or the like. Of the metal wood head 1 described above.

The following metal materials can be used as the materials used for the members constituting the face portion 2A, the crown portion 5A and the hosel portion 6 of the present invention. That is, among iron steel materials, (S25C, S35C, S45C, etc) for carbon steel for machine structure, (SCM440, etc) for chromium molybdenum steel, (SCr440, etc) for chromium steel, and (SMn) for manganese steel
443, etc) for stainless steel (SUS304,
SUS420J2, SUS630, etc) can be used.

As the aluminum alloy material, (A20
14, A2017, A2024, 5000-6000 series and A7N01, A7075, etc) can be used. In addition, pure titanium materials and titanium alloy materials (Ti-6
Al-4V, Ti-22V-4Al, Ti-15V-3
Cr-3Al-3Sn, Ti-4.5Al-3V-2F
e-2Mo, Ti-10V-2Fe-3Al, etc)
And the like can be appropriately selected and used.

(Embodiment 1) As an embodiment of the metal wood head 1 of the present invention, the material of the face hosel member 2 is Ti-22V-4Al of a titanium alloy material.
If a round bar-shaped material such as Ti-4.5Al-3V-2Fe-2Mo or the like is used and a semi-closed type (burring) forging is used by hot forging, the ductility is good and the strength is high. The shape can be formed by forging, and in this case, the thickness of the face hosel member 2 is desirably set to about 2.0 mm to about 3.5 mm. Further, as the material of the sole / back face member 3, Ti-22V-4Al or Ti-4.5Al-
If 3V-2Fe-2Mo or the like is used, the required shape can be formed by forging or press working since the ductility is relatively good. In this case, the thickness of the crown member 5 and the sole / back face member 3 can be set to about 0.8 mm to about 2.0 mm, but about 1.0 m
If the thickness is between m and 1.5 mm, the metal metal wood head 1 can maintain durability.

Since the crown member 5 and the sole / back face member 3 do not need the strength as high as the face hosel member 2 described above, for example, a pure titanium material is used for forging or It can be formed into the required shape by pressing. If the thickness of the crown member 5 and the sole / back face member 3 in this case is about 1.5 mm to 2.0 mm, the metal wood head 1 that is satisfactory in terms of durability and weight distribution can be obtained. It can be supplied. Further, compared to the above-mentioned titanium alloy material, the pure titanium material is more economical because the raw material cost can be reduced.

It is of course possible to use pure titanium material as the material of the face hosel member 2.
Of course, the combination of the crown member 5 and the sole / back face member 3 with a pure titanium material is also possible.

(Embodiment 2) As another embodiment of the metal wood head 1 of the present invention, a face hosel member 2
When an aluminum alloy material is used as the material of (A2014, A2017, A2020, 5000)
~ 6000 series, A7N01, A7075, et
If c) or the like is used, the required shape can be easily formed by forging because of good ductility and strength. or,
In that case, the thickness of the face hosel member 2 can be set to about 4.0 mm to about 6.0 mm.

In particular, the thickness of the face 2A is preferably about 5.0 mm. Further, the material of the crown member 5 and the sole / back face member 3 is an aluminum alloy material (A2014, A2017, A202).
4, 5000-6000 series or A7N01, A7
075, etc) or the like, the ductility is relatively good, so that the required shape is formed by forging. In this case, the thickness of the crown member 5 and the sole / back face member 3 is about 2 It can be set to about 0.0 mm to about 4.0 mm.

Since the sole / back face member 3 does not need to be as strong as the face hosel member 2 described above, it may be made of, for example, aluminum alloy (A20).
14, A2017, etc) or the like, and can be formed into a required shape by forging or pressing. If the thickness of the sole / back face member 3 in this case is about 3.0 mm, a satisfactory metal wood head 1 can be supplied in terms of durability and weight distribution. Aluminum alloy (5000-6000 series or A7N
01, A7075, etc) and the like, the material such as the above-mentioned aluminum alloy (A2014, A2017, etc) is cheaper in terms of raw material cost and is more economical.

Embodiment 3 As an embodiment of the metal wood head 1 of the present invention, the material of the face hosel member 2 is carbon steel for machine structure (S25C,
S35C, S45C, etc), chrome molybdenum steel (SCM440, etc), chrome steel (SCr440,
etc), for manganese steels (SMn443, etc),
Stainless steel (SUS304, SUS420J2, SU
S630, etc) and the like can be used. In that case, the thickness of the face hosel member 2 is
It can be set to about 2.0 mm to about 3.0 mm. In particular, as the thickness of the face portion 2A,
About 2.5 mm is preferable.

Further, as the material of the crown member 5 and the sole / back face member 3, carbon steel for machine structure (S25C, S35C, S45C, etc) as an iron rope material,
For chromium molybdenum steel (SCM440, etc), chrome steel (SCr440, etc), and manganese steel, (SMn
443, etc), stainless steel (SUS304, SU
S420J2, SUS630, etc) or the like can be used.

In this case, the thickness of the crown member 5 and the sole / back face member 3 can be set to about 0.5 mm to about 2.0 mm.
If the thickness is about 1.0 mm, the metal wood head 1 can maintain the durability. Stainless steel SUS630 is used as the face hosel member 2 and the crown member 5 and the sole back face member 3 are used. As stainless steel SUS630
Is used, the thickness of the face hosel member 2 is about 1.5 mm to 2.5 mm, and the thickness of the sole / back face member 3 is about 1.2 mm. It can be maintained.

[0042]

As described above, in the metal wood head according to the present invention, even if the material is hard and has low elongation and poor formability, the stamping position can be prevented from slipping, so that clear embossing can be performed. This has the same effect.

In the present invention, unlike the conventional manufacturing method of stamping, an upper die and an inner die are integrated with each other while strongly holding a sole / back face member made of a plate-shaped metal material. Since the plastic deformation occurs while sliding, the stress on the mold body is remarkably relieved, cracks do not occur on the mold body, and the stamped parts of the inner die are not damaged. The advantage is that the service life of the mold can be greatly extended, the production cost can be reduced, and a more inexpensive metal wood head can be supplied.

Further, in the present invention, since the portion of the inner die can be replaced, if the stamp of the inner die is worn out, the inner die may be replaced with a new inner die, and the cost of remodeling the mold can be reduced. In addition, when a new design letter or design is used, a metalwood head with a new design can be provided simply by replacing the part of this inner die, which has the effect of significantly improving the design flexibility. .

In the metal wood head of the present invention, since the thickness of each of the above members can be selected and combined in various combinations, the hitting durability can be significantly improved without lowering the strength of the metal wood head itself. However, the effect of increasing the volume ratio is achieved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an assembled state of a metal wood head according to the present invention.

FIG. 2 is a perspective view showing a metal wood head according to the present invention.

FIG. 3 is a perspective view showing a face hosel member, a crown member, and a sole back face member constituting the metal wood head according to the present invention.

FIG. 4 is an essential part cross sectional view showing a step of manufacturing a sole / back face member in the method of manufacturing a metal wood head according to the present invention.

FIG. 5 is a cross-sectional view of a main part showing a step of manufacturing a sole / back face member in the method for manufacturing a metal wood head according to the present invention.

FIG. 6 is a plan view showing upper and lower molds according to the method for manufacturing a metal wood head according to the present invention.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 metal wood head 2 face hosel member 2A face portion 3 sole back face member 3A sole portion 3B side wall portion 4 engraved portion 5 crown member 5A crown portion 6 hosel portion 6A hosel end 7 toe portion 8 back face portion 9 heel portion DESCRIPTION OF SYMBOLS 10 Joining part 11 Inner die 11A Engraved 11B Slide part 11C Locking part 11D Suspension 11E Coil spring 12 Lower mold 12 Concave curved part 12A Toe part 12B Back face part 12C Heel part 12D Hosel end part 12E Side wall part 12F Sole part 13 Upper die 14 Temporary weld

Continuation of the front page (72) Inventor Teruyuki Fukugakiuchi 1-58 Yoshiyuki, Saijo-cho, Higashihiroshima-shi, Hiroshima F-term (reference) 2C002 AA02 MM04 PP02 PP03

Claims (7)

[Claims] 1. A hosel end portion of a heel portion which is joined to each of members constituting a face portion, a crown portion and a hosel portion formed by forging, pressing or lost wax, and passing from a toe portion to a back face portion. The sole and back face members whose side walls are integrally erected from the sole are formed by forging or press working, and these members are joined and integrated, and the joined and integrated portions are welded. In the metal wood head, the sole / back face member is formed by forming a concave curved shape of the sole / back face member by a sliding inner die on which a stamp of a design such as a character or / and a figure is applied. A metal wood head, wherein the stamp is stamped at the same time. 2. The face, crown, and hosel members formed by forging, pressing, or lost wax are each made of a steel material, an aluminum alloy material, a titanium alloy material, and the like. 2. The metal wood head according to claim 1, wherein the sole / back face member is formed by forging or pressing a steel material, an aluminum alloy material, a titanium alloy material, a pure titanium material, or the like. 3. The metal wood head according to claim 1, wherein the metal wood head has a member configuration of a two-piece type, a three-piece type, a four-piece type, or the like. 4. A sole portion joined to a face portion, a crown portion, and a hosel portion formed by forging, pressing, or lost wax, and a sidewall portion extending from a toe portion to a back face portion to a hosel end portion of a heel portion. Manufacturing of a metal wood head composed by forming a sole / back face member that is integrally erected from forging or press working, joining and integrating these members, and welding the joined and integrated portion. In the method, the sole / back face member is formed by forging or pressing a concave curved shape of the sole / back face member by a stamped inner die having a design such as a character or / and a graphic. Manufacturing the metal wood head, wherein the engraving is simultaneously imprinted. Method. 5. The method for manufacturing a metal wood head according to claim 1, wherein a sole / back face member made of a plate-like metal material is extended from the toe portion to the hosel end of the heel portion through the back face portion, and a side wall portion is integrally formed from the sole portion. Along with being installed on a lower mold having an upright concave curved portion,
The sole portion of the lower die is a core-type inner die having an upper portion engraved with a design such as a character or / and a graphic, and the inner die is formed of an upper die and a sole / back face member. An inner die that has a sliding part that moves up and down in the lower mold as it moves up and down, a locking part, and a suspension structure inside, and protrudes from the lower mold as the upper and lower molds approach. A sole / back face member made of a plate-shaped metal material is sandwiched by the upper mold and the sole / back face member is formed into a concave curved shape by forging or pressing, and at the same time, the sole is stamped with an inner die. A method for manufacturing a metal wood head, comprising stamping a part. 6. The face, crown, and hosel portions formed by forging, pressing, or lost wax according to the method of manufacturing a metal wood head are made of steel, aluminum alloy,
The sole / back face member is formed of a titanium alloy material or the like, and the sole / back face member is formed by forging or pressing a steel material, an aluminum alloy material, a titanium alloy material, a pure titanium material, or the like. 4 or 5
A method for manufacturing the metal wood head described in the above. 7. The method for manufacturing a metal wood head,
7. The method for manufacturing a metal wood head according to claim 4, wherein the metal wood head has a member configuration of a two-piece type, a three-piece type, a four-piece type, or the like.