Golf Club Head

Abstract

Disclosed herein is a golf club head with a central body component (5). The central body component (5) includes a crown portion (15) and a sole portion (20). The crown portion (15) is made of a continuous carbon fiber reinforced epoxy material. The sole portion (20) is made of a chopped carbon fiber reinforced vinylester sheet molding compound material. The central body component (5) has a front opening (6) and a rear opening (8) with a hollow interior.

Description

[Technical field]

[0001] The present invention relates to golf club heads, and more particularly to golf club heads with carbon-based central body components. [Background technology]

[0002] The prior art discloses the use of carbon fiber components for golf club heads.

[0003] Products of inertia relate to moments about one axis with head rotations about another axis. These head rotations then produce vertical or horizontal gear effects that impart backspin and increased or decreased draw or fade spin to the golf ball. Unlike the spins produced by traditional gear effects associated with Iyy and Izz, these spins cannot be compensated for by adjusting the face bulge radius and face roll radius. When club heads are larger than 300cc and the moments of inertia are larger, with Izz greater than 3000 grams squared and Iyy greater than 1800 grams, the products of inertia tend to be larger as well. Larger products of inertia have a detrimental effect on variability.

[0004] Therefore, there is a need for large volume golf club heads with smaller products of inertia and large moments of inertia, a need that is difficult to meet because large products of inertia are a by-product of large moments of inertia. Summary of the Invention

[0005] One aspect of the present invention is a component for a golf club head, including a crown portion made of a first carbon-based material and a sole portion made of a second carbon-based material.

[0006] Another aspect of the invention is a component for a golf club head. The component includes a crown portion and a sole portion. The crown portion is comprised of a continuous carbon fiber reinforced epoxy material. The crown portion has a thickness ranging from 0.025 inches to 0.040 inches. The sole portion is comprised of a chopped carbon fiber reinforced vinyl ester sheet molding compound material. The sole portion has a thickness ranging from 0.040 inches to 0.240 inches. The crown portion is attached to the sole portion. The component has a front opening and a rear opening with a hollow interior.

[0007] Yet another aspect of the present invention is a golf club head. The golf club head includes a face component, a center body component, and a rear component. The component includes a crown portion and a sole portion. The crown portion is made of a continuous carbon fiber reinforced epoxy material. The crown portion has a thickness ranging from 0.025 inches to 0.040 inches. The sole portion is made of a chopped carbon fiber reinforced vinyl ester sheet molding compound material. The sole portion has a thickness ranging from 0.040 inches to 0.240 inches. The crown portion is attached to the sole portion. The component has a front opening and a rear opening with a hollow interior. The face component is attached to the front opening of the center body and the rear component is attached to the rear opening of the center body.

[0008] Yet another aspect of the present invention is a golf club head. The golf club head includes a face component, a center body component, and a rear component. The component includes a crown portion and a sole portion. The crown portion is made of a continuous carbon fiber reinforced epoxy material. The crown portion has a thickness ranging from 0.025 inches to 0.040 inches. The sole portion is made of a chopped carbon fiber reinforced vinyl ester sheet molding compound material. The sole portion has a thickness ranging from 0.040 inches to 0.240 inches. The crown portion is attached to the sole portion. The component has a front opening and a rear opening with a hollow interior. The face component is attached to the front opening of the center body and the rear component is attached to the rear opening of the center body. [Brief description of the drawings]

[0009] [Figure 1] FIG. 2 is a top view of a part of a golf club head. [Diagram 2] FIG. 2 is a bottom view of the component of FIG. 1. [Diagram 3] FIG. 2 is a front view of the components of FIG. 1; [Figure 4] FIG. 2 is a rear view of the components of FIG. 1. [Diagram 5] FIG. 2 is a bottom perspective view of the components of FIG. 1. [Figure 6] FIG. 2 is a side view of the component of FIG. 1. [Figure 7] FIG. 2 is an enlarged view of the components of FIG. 1. [Figure 8] FIG. 2 is a side view of the components of FIG. 1 with the face and back weighting components in dashed lines. [Figure 9] FIG. 2 is an enlarged view of a multi-part golf club head. [Figure 10] FIG. 2 is an enlarged view of a multi-part golf club head. [Figure 11] FIG. 1 is a top view of a first embodiment of a golf club head. [Figure 12] FIG. 12 is a bottom view of the golf club head of FIG. [Figure 13] FIG. 12 is a top perspective view of the golf club head of FIG. [Figure 14] FIG. 12 is a rear view of the golf club head of FIG. [Figure 15] FIG. 12 is a front view of the golf club head of FIG. [Figure 16] FIG. 12 is a side view of the toe side of the golf club head of FIG. 11. [Figure 17] FIG. 12 is a heel side view of the golf club head of FIG. 11. [Figure 18] FIG. 2 is a top view of a second embodiment of a golf club head. [Figure 19] FIG. 19 is a bottom view of the golf club head of FIG. 18. [Figure 20] FIG. 19 is a top perspective view of the golf club head of FIG. 18. [Figure 21] FIG. 19 is a rear view of the golf club head of FIG. 18. [Figure 22] FIG. 19 is a front view of the golf club head of FIG. 18. [Figure 23] FIG. 19 is a side view of the toe side of the golf club head of FIG. 18. [Figure 24] FIG. 19 is a heel side view of the golf club head of FIG. 18. [Diagram 25] FIG. 13 is a top view of a third embodiment of a golf club head. [Figure 26] FIG. 26 is a bottom view of the golf club head of FIG. 25. [Figure 27] FIG. 26 is a top perspective view of the golf club head of FIG. 25. [Figure 28] FIG. 26 is a rear view of the golf club head of FIG. 25. [Figure 29] FIG. 26 is a front view of the golf club head of FIG. 25. [Diagram 30] FIG. 26 is a side view of the toe side of the golf club head of FIG. 25. [Diagram 31] FIG. 26 is a heel side view of the golf club head of FIG. 25. [Diagram 32] FIG. 13 is a top view of a fourth embodiment of a golf club head. [Diagram 33] FIG. 33 is a bottom view of the golf club head of FIG. 32. [Diagram 34] FIG. 33 is a top perspective view of the golf club head of FIG. 32. [Diagram 35] FIG. 33 is a rear view of the golf club head of FIG. 32. [Diagram 36] FIG. 33 is a front view of the golf club head of FIG. 32. [Figure 37] FIG. 33 is a side view of the toe side of the golf club head of FIG. 32. [Figure 38] FIG. 33 is a heel side view of the golf club head of FIG. 32. [Figure 39] 1 is an illustration of a first embodiment of a stress relief part. [Diagram 40] 1 is an illustration of a second embodiment of a stress relief component. [Diagram 41]FIG. 2 is a top view of a golf club head showing the CG location. [Diagram 42] FIG. 2 is a front view of a golf club head showing the CG location. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] As shown in Figures 1-8, a component 5 for a golf club head includes a crown portion 15 and a sole portion 20. The crown portion 15 is made of a continuous carbon fiber reinforced epoxy material and has a thickness ranging from 0.025 inches to 0.040 inches. The sole portion 20 is made of a chopped carbon fiber reinforced vinyl ester sheet molding compound material and has a thickness ranging from 0.040 inches to 0.240 inches. The crown portion 15 is attached to the sole portion 20. The component 5 has a front opening 6 and a rear opening 8 with a hollow interior.

[0011] FIG. 7 is an enlarged view of the part 5.

[0012] FIG. 8 shows part 5 with the face part attached to the central body and the back weighting part both in dashed lines.

[0013] The sole portion is preferably thicker than the crown portion.

[0014] Preferably, the first carbon-based material has continuous fibers and the second carbon-based material has chopped fibers.

[0015] As shown in FIGS. 9 and 10, the sole portion 20 has a toe edge wall 22 and a heel edge wall 24 .

[0016] The crown portion 15 has a radius of curvature.

[0017] The sole portion 20 has a plurality of facets.

[0018] In another embodiment, as shown in FIGS. 9-17, a golf club head 10 includes a face component 25, a central body component 12, and a rear component 14. As shown in FIG.

[0019] The face piece 25 is attached to a front opening of the central body 12 and the rear piece 14 is attached to a rear opening of the central body 12 .

[0020] The central body component 12 includes a crown portion 15 having a thickness ranging from 0.025 inch to 0.040 inch and made of a continuous carbon fiber reinforced epoxy material, and a sole portion 20 having a thickness ranging from 0.040 inch to 0.240 inch and made of a chopped carbon fiber reinforced vinyl ester sheet molding compound material. The crown portion 15 is attached to the sole portion 20. The component has front and rear openings with a hollow interior.

[0021] The face component 25 is preferably made of a metallic material.

[0022] The rear part 14 is preferably made of a metallic material.

[0023] Alternatively, the face component 25 is made of a titanium alloy material.

[0024] 11 to 17 show a golf club head 100 according to another embodiment.

[0025] 18 to 24 show a golf club head 200 according to another embodiment.

[0026] 25 to 31 show a golf club head 300 according to another embodiment.

[0027] 32-38 show a golf club head 400 according to another embodiment.

[0028] As shown in Figures 39-40, the stiffening member 30 in the preferred embodiment includes a wishbone structure.

[0029] The stiffening member 30 is preferably located entirely within 1 inch, more preferably within 0.500 inches, and most preferably within about 0.433 inches of the interior surface 31 of the striking face section as measured along a vertical plane extending perpendicular to the striking face section and in a front-to-back direction through the face center. Locating the stiffening member 30 within the area of ​​the golf club head 10 defined above provides the greatest stress reduction effect on the golf club head 10, and particularly the striking face section. In a preferred embodiment, the stiffening member 30 has a height ranging from 2 inches to 3 inches, most preferably 2.25 inches to 2.75 inches. In a preferred embodiment, the stiffening member 30 has a narrowest width at the center, which is preferably in the range of 0.1 inches to 0.25 inches, and a widest width at the base, which is preferably in the range of 0.5 inches to 1.0 inches.

[0030] The stiffening member 30 of the present invention may be used as described herein in any type of golf club head with a hollow interior, including putters, irons, wedges, hybrids, fairway woods, and drivers. In any of the embodiments disclosed herein, when the golf club head 10 is designed as a driver, the golf club head 10 preferably has a volume of 200 cubic centimeters to 600 cubic centimeters, more preferably 300 cubic centimeters to 500 cubic centimeters, and most preferably 420 cubic centimeters to 470 cubic centimeters, with a most preferred volume of 460 cubic centimeters. In fact, in a preferred embodiment, the golf club head 10 has a volume of about 450 cc to 460 cc. The volume of the golf club head 10 will also vary between fairway woods (preferably in the range of 3 wood to 11 wood) with a smaller volume than the driver. When designed as a driver, the golf club head 10 preferably has a mass of 215 grams or less, and most preferably a mass of 180 grams to 215 grams. When designed as a fairway wood, the golf club head 10 preferably has a mass of 135 to 200 grams, preferably 140 to 165 grams. The mass of the body, and therefore the discretionary mass of the entire golf club head 10, can be adjusted by creating a notch in the sole section and filling the notch with an insert made of a lightweight material, such as a carbon composite, plastic, or low density metal alloy. Similarly, the crown insert can be molded from a carbon composite material to accommodate additional discretionary mass.

[0031] Composite laminates -UD

[0032] The individual layers or plies in a composite laminate may be composed of unidirectional (UD) composite plies, or a consistent weave of biaxially or triaxially woven composites. For purposes of this invention, fiber reinforcement in a composite system may include carbon, fiberglass, aramid, or any combination of the three.

[0033] The number of layers or plies in the stack of the composite laminate of the present invention can vary between 2 plies and 200 plies. The composite laminate involves several layers. Each composite ply may be either a UD, biaxially woven, or triaxially woven composite. The fiber weight (FAW) of each composite ply can range from 20 gsm up to 500 gsm. The fiber reinforcement in the composite for each ply may include carbon, fiberglass, aramid, or any combination of the three. The matrix that is combined with the fiber bundles of each ply to create the composite of the present invention can be a thermoset material (epoxy, polyester, vinyl ester, etc.), or a thermoplastic material (nylon, polycarbonate, PPS, PEKK, PEEK, etc.). The cross sections of the UD composite panel and the UD and multiaxial composite laminates each show the different layers.

[0034] Composite laminate-SMC

[0035] In some embodiments, the composite may be a sheet molding compound (SMC) that may be composed of chopped fibers, each chopped fiber having a length less than 0.0625 inches, or a length that is greater than or equal to 2 inches and less than or equal to 4 inches.

[0036] The SMC of the present invention has the following qualities: The fiber reinforcement of the SMC may include carbon, fiberglass, aramid, or any combination of the three. The matrix that is combined with the fiber bundles of each ply to create the composite of the present invention can be a thermoset material (epoxy, polyester, vinyl ester, etc.) or a thermoplastic material (nylon, polycarbonate, PPS, PEKK, PEEK, etc.). The thickness of the SMC may vary between 0.015" and 0.250".

[0037] Composite laminate + SMC

[0038] As per the present invention, the use of continuous and discontinuous materials may be used within the same composite part. According to Equation 2, the continuous fiber ratio quantifies the amount of continuous fiber present in a laminate compared to discontinuous fiber or SMC.

[0039] VACNTs can be placed at the interfaces of composite plies to improve interlaminar shear strength while also improving overall fatigue life. VACNTs bridge various composite plies to improve the interlaminar properties of the interface and stop crack propagation or pre-failure modes at the interlaminar level. As pertaining to the present invention, the length of the VACNTs may vary between 5 μm and 50 μm. The VACNTs of the present invention have the following qualities: VACNT height can vary between 5 μm and 50 μm. VACNTs are applied on a single side of the composite ply. VACNTs are applied on both sides of the composite ply. The additive laminate ratio can vary between 0.05 and 0.90.

[0040] If the golf club head is designed as a driver, the golf club head preferably has a volume of 200 cubic centimeters to 600 cubic centimeters, more preferably 300 cubic centimeters to 500 cubic centimeters, most preferably 420 cubic centimeters to 470 cubic centimeters, with a most preferred volume of 460 cubic centimeters. In a preferred embodiment, the golf club head has a volume of about 450 cc to 460 cc. The volume of the golf club head will also vary between fairway woods (preferably in the range of 3-wood to 11-wood) with a smaller volume than the driver. If designed as a driver, the golf club head preferably has a mass of 215 grams or less, most preferably 180 grams to 215 grams. If designed as a fairway wood, the golf club head preferably has a mass of 135 grams to 200 grams, preferably 140 grams to 165 grams.

[0041] In each of the embodiments disclosed herein, the face component is preferably cast from molten metal by a method such as the well-known lost wax casting method. The casting metal is preferably titanium or a titanium alloy, such as forging 6-4 titanium alloy, alpha + beta titanium alloy, or beta titanium alloy, and casting 6-4 titanium. Alternatively, the face component is made of 17-4 steel alloy. Additional methods for manufacturing the face component include forming the body from a flat sheet of metal, superplastically forming the face component from a flat sheet of metal, machining the face component from a solid block of metal, electrochemically milling the face component from a forged preform, casting the body using centrifugal casting, casting the face component using float casting, and similar manufacturing methods.

[0042] The face component preferably has a turnout extending laterally from the periphery of the front wall to the rear surface. The turnout of the face component preferably includes an upper side section, a lower side section, a heel side section, and a toe side section. Thus, the turnout preferably surrounds the striking plate insert a full 360 degrees. However, one skilled in the art will recognize that the turnout may only encompass a partial section of the striking plate insert, for example 270 degrees or 180 degrees, and may be discontinuous. The upper side sections extend a predetermined distance d toward the rear toward the central body component to engage the crown. In a preferred embodiment, the predetermined distance is in the range of 0.2 inches to 1.0 inches, more preferably 0.40 inches to 0.75 inches, and most preferably 0.68 inches, as measured from the outer periphery of the striking plate insert to the rear edge of the upper side sections. In a preferred embodiment, the upper side sections have an overall curvature from the heel end to the toe end. The upper side sections have a length from the outer periphery of the striking plate insert that is preferably a minimum length near the center of the striking plate insert and increases toward the toe and heel ends. However, one skilled in the art will recognize that the minimum length may be at the heel end or the toe end. The face component engages the crown portion of the central body component along a substantially horizontal plane with some bending, the barb having an undercut portion and a front edge of the crown portion disposed across the undercut portion.

[0043] The heel side section is substantially perpendicular to the striking plate insert and the heel side section covers the hosel prior to engaging the optional ribbon section and bottom section of the sole portion of the central body piece. The heel side section is attached to the sole portion. The heel side section preferably extends inward from the outer periphery a distance d'", a distance of 0.250 inches to 1.50 inches, more preferably 0.50 inches to 1.0 inches, and most preferably 0.950 inches. The heel side section preferably has an overall bend at its edge. At the other end of the face component is a toe side section. The toe side section is attached to the sole portion. The toe side section preferably extends inwardly from the periphery a distance d" between 0.250 inches and 1.50 inches, more preferably between 0.75 inches and 1.30 inches, and most preferably 1.20 inches. The toe side section preferably has an overall curvature at its edge. The lower side sections of the face component extend inwardly toward the central body component a predetermined distance to engage the sole portion. In a preferred embodiment, the predetermined distance is in the range of 0.2 inches to 1.25 inches, more preferably 0.50 inches to 1.10 inches, and most preferably 0.9 inches, as measured from the outer periphery of the striking plate insert to the edge of the lower side section. In a preferred embodiment, the lower side section has an overall curvature from the heel end to the toe end. The lower side section has a length from the outer periphery of the striking plate section that is preferably smallest near the center of the striking plate section and increases toward the toe end 38 and heel end.

[0044] As shown in Figures 41-42, the axes of inertia are designated as X, Y, and Z. The X-axis extends from the striking plate insert through the center of gravity CG to the rear of the golf club head 10. The Y-axis extends from the toe end of the golf club head 10 through the center of gravity CG to the heel end of the golf club head 10. The Z-axis extends from the crown through the center of gravity CG to the sole.

[0045] Golf Club Design, Fitting, Alteration & Repair, 4 th As defined in Golf Club Design, Fitting, Alteration & Repair, "The center of gravity or mass of a golf club head is the interior point of the club head determined by the perpendicular intersection of two or more points about which the club head balances when suspended. A more thorough explanation of this definition of center of gravity is provided in Golf Club Design, Fitting, Alteration & Repair, "The Center of Gravity of a Golf Club," ...

[0046] The center of gravity and moment of inertia of the golf club head 10 are measured in the test frame (X T ,Y T ,Z T ) and then the head's frame (X H ,Y H ,Z H) The center of gravity of the golf club head may be obtained using a center of gravity table with two weight scales as disclosed in U.S. Patent No. 6,607,452, entitled "High Moment Of Inertia Composite Golf Club," which is incorporated herein by reference in its entirety. If a shaft is present, it is removed and replaced with a hosel cube having multiple faces perpendicular to the axis of the golf club head. Given the weight of the golf club head, it is possible to determine the weight distribution of the golf club head by the scales when the golf club head is placed on both scales at the same time and weighted along a particular direction, X, Y, or Z direction.

[0047] Generally, the moment of inertia I about the Z axis for the golf club head 10 of the present invention is preferably 4000 g-cm 2 More preferably, 5000g-cm 2 or more, preferably 4500 g-cm 2 From 6000g-cm 2 The moment of inertia Iyy about the Y axis for the golf club head 10 of the present invention is preferably in the range of 2500 g-cm 2 From 4000g-cm 2 , more preferably 3000 g-cm 2 From 3500g-cm 2 The moment of inertia Ixx about the X-axis for the golf club head 10 of the present invention is preferably in the range of 2000 g-cm 2 From 3500g-cm 2 , more preferably 2500 g-cm 2 From 3300g-cm 2 is in the range.

[0048] At least one of the products of inertia (Iyz and Ixz) of the golf club head is less than 300 g-cm 2 The absolute value of the product of inertia Iyz is preferably less than 50 g-cm 2 From 200g-cm2 Between 50g-cm and 60g-cm 2 From 125g-cm 2 It is preferable that the ratio is between 1 and 2. It should be noted that the present invention includes the following aspects. [Aspect 1] a face component with a stiffening member; A central body part, a crown portion made of a first carbon-based material; and a sole portion made of a second carbon-based material, The crown portion is attached to the sole portion, the part having a front opening and a back opening with a hollow interior; the central body part; Rear parts and A golf club head comprising: the face piece is attached to a front opening of the central body, and the rear piece is attached to a rear opening of the central body; The golf club head has a resistance of 4000 g-cm 2 From 6000g-cm 2 The golf club head has a moment of inertia Izz in the range. [Aspect 2] 2. The golf club head of claim 1, wherein the face component is made of a metal material. [Aspect 3] 2. The golf club head of claim 1, wherein the face component is made of a titanium alloy material. [Aspect 4] 2. The golf club head of claim 1, wherein the rear piece is made of a metal material. [Aspect 5] 2. The golf club head of embodiment 1, wherein the first carbon-based material has continuous fibers and the second carbon-based material has chopped fibers. [Aspect 6] 2. The golf club head of claim 1, wherein the sole portion has a toe edge wall and a heel edge wall. [Aspect 7] 2500g-cm 2 From 4000g-cm 2 2. The golf club head of claim 1, having a moment of inertia Iyy in the range [Aspect 8] 2000g-cm 2 From 3500g-cm 2 2. The golf club head of claim 1, having a moment of inertia Ixx in the range of [Aspect 9] A face part; A central body part, a crown portion made of a first carbon-based material; and a sole portion made of a second carbon-based material, The crown portion is attached to the sole portion, the part having a front opening and a back opening with a hollow interior; the central body part; Rear parts and A golf club head comprising: the face piece is attached to a front opening of the central body, and the rear piece is attached to a rear opening of the central body; The golf club head has a resistance of 4000 g-cm 2 From 6000g-cm 2 The golf club head has a moment of inertia Izz in the range. [Aspect 10] 10. The golf club head of claim 9, wherein the face component is made of a metal material. [Aspect 11] 10. The golf club head of claim 9, wherein the face component is made of a titanium alloy material. [Aspect 12] 10. The golf club head of claim 9, wherein the rear piece is made of a metal material. [Aspect 13] 2500g-cm 2 From 4000g-cm 2 10. The golf club head of embodiment 9, having a moment of inertia Iyy in the range of: [Aspect 14] 2000g-cm 2 From 3500g-cm 2 10. The golf club head of claim 9, having a moment of inertia Ixx in the range of: [Aspect 15] A face part; A central body part, a crown portion having a thickness ranging from 0.025 inches to 0.040 inches and made of a continuous carbon fiber reinforced epoxy material; a sole portion having a thickness ranging from 0.040 inches to 0.240 inches and made of a chopped carbon fiber reinforced vinyl ester sheet molding compound material; The crown portion is attached to the sole portion, the part having a front opening and a back opening with a hollow interior; the central body part; Rear parts and A golf club head comprising: the face piece is attached to a front opening of the central body, and the rear piece is attached to a rear opening of the central body; The golf club head has a resistance of 4000 g-cm 2 From 6000g-cm2 The golf club head has a moment of inertia Izz in the range. [Aspect 16] 16. The golf club head of claim 15, wherein the face component is made of a metal material. [Aspect 17] 16. The golf club head of claim 15, wherein the face component is made of a titanium alloy material. [Aspect 18] 16. The golf club head of claim 15, wherein the rear piece is made of a metal material. [Aspect 19] 2500g-cm 2 From 4000g-cm 2 16. The golf club head of embodiment 15, having a moment of inertia Iyy in the range [Aspect 20] 2000g-cm 2 From 3500g-cm 2 16. The golf club head of claim 15, having a moment of inertia Ixx in the range of [Explanation of symbols]

[0049] 5 parts 6 Front opening 8 Rear opening 10. Golf club head 12. Central body parts 14 Rear parts 15 Crown section 20 Sole 22 Toe wall 24 Heel edge wall 25 Face parts 30 Reinforcement member 31 Internal surface 38 Toe end 100 Golf Club Heads 200 Golf Club Head 300 Golf Club Head 400 Golf Club Head CG center of gravity

Claims

1. a face component with a stiffening member; A central body part, a crown portion made of a first carbon-based material; and a sole portion made of a second carbon-based material, The crown portion is attached to the sole portion, the central body part having a front opening and a rear opening with a hollow interior; the central body part; Rear parts and A golf club head comprising: the face piece is attached to a front opening of the central body piece, and the rear piece is attached to a rear opening of the central body piece; the first carbon-based material has continuous fibers and the second carbon-based material has chopped fibers; The golf club head has a compressive strength of 4000 g-cm ２ to 6000 g-cm ２ The golf club head has a moment of inertia Izz in the range of

2. The golf club head of claim 1 , wherein the face component is made of a metallic material.

3. The golf club head of claim 1 , wherein the face component is made of a titanium alloy material.

4. The golf club head of claim 1 , wherein the rear piece is made of a metallic material.

5. 2. The golf club head of claim 1, wherein the sole portion has a toe edge wall and a heel edge wall.

6. 2500g-cm ２ to 4000 g-cm ２ The golf club head of claim 1 having a moment of inertia Iyy in the range of

7. a face component with a stiffening member; A central body part, a crown portion made of a first carbon-based material; and a sole portion made of a second carbon-based material, The crown portion is attached to the sole portion, the central body part having a front opening and a rear opening with a hollow interior; the central body part; Rear parts and A golf club head comprising: the face piece is attached to a front opening of the central body piece, and the rear piece is attached to a rear opening of the central body piece; The golf club head has a compressive strength of 4000 g-cm ２ to 6000 g-cm ２ and a moment of inertia Izz in the range The golf club head has a compressive strength of 2000 g-cm ２ to 3500 g-cm ２ and a moment of inertia Ixx in the range The golf club head, wherein the first carbon-based material has continuous fibers and the second carbon-based material has chopped fibers.

8. A face part; A central body part, a crown portion made of a first carbon-based material; and a sole portion made of a second carbon-based material, The crown portion is attached to the sole portion, the central body part having a front opening and a rear opening with a hollow interior; the central body part; Rear parts and A golf club head comprising: the face piece is attached to a front opening of the central body piece, and the rear piece is attached to a rear opening of the central body piece; The golf club head has a compressive strength of 2000 g-cm ２ to 3500 g-cm ２ and a moment of inertia Ixx in the range The golf club head has a compressive strength of 4000 g-cm ２ to 6000 g-cm ２ and a moment of inertia Izz in the range The golf club head, wherein the first carbon-based material has continuous fibers and the second carbon-based material has chopped fibers.

9. The golf club head of claim 8 , wherein the face component is made of a metallic material.

10. The golf club head of claim 8 , wherein the face component is made of a titanium alloy material.

11. The golf club head of claim 8 , wherein the rear piece is made of a metallic material.

12. 2500g-cm ２ to 4000 g-cm ２ The golf club head of claim 8 having a moment of inertia Iyy in the range of

13. A face part; A central body part, a crown portion having a thickness ranging from 0.025 inches to 0.040 inches and made of a continuous carbon fiber reinforced epoxy material; a sole portion having a thickness ranging from 0.040 inches to 0.240 inches and made of a chopped carbon fiber reinforced vinyl ester sheet molding compound material; The crown portion is attached to the sole portion, the central body part having a front opening and a rear opening with a hollow interior; the central body part; Rear parts and A golf club head comprising: the face piece is attached to a front opening of the central body piece, and the rear piece is attached to a rear opening of the central body piece; The golf club head has a compressive strength of 4000 g-cm ２ to 6000 g-cm ２ The golf club head has a moment of inertia Izz in the range of

14. The golf club head of claim 13 , wherein the face component is made of a metallic material.

15. The golf club head of claim 13 , wherein the face component is made of a titanium alloy material.

16. The golf club head of claim 13 , wherein the rear piece is made of a metallic material.

17. 2500g-cm ２ to 4000 g-cm ２ The golf club head of claim 13 having a moment of inertia Iyy in the range of

18. 2000g-cm ２ to 3500 g-cm ２ The golf club head of claim 13 having a moment of inertia Ixx in the range of

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