TWI753836B - Mixed material golf club head - Google Patents

Abstract

A hollow golf club head includes a metallic front body coupled with a composite rear body. The front body includes a strike face and a surrounding frame that extends rearward from a perimeter of the strikeface. The rear body includes a crown member coupled with a sole member. The sole member has a structural layer formed from a filled thermoplastic material, while the resilient layer is bonded to the external surface of the structural layer and is formed from a fiber-reinforced thermoplastic composite material. The resilient layer has an opening through which a metallic weight pad at least partially extends. The weight pad is bonded to the structural layer and includes an aperture for attaching a metallic weight.

Description

Hybrid Golf Club Heads

The present invention pertains to golf club heads having hybrid material constructions.

Generally speaking, the overall performance of a golf club head depends on a number of important physical parameters (eg, volume, mass, etc.), and the total mass is the most important physical parameter of a golf club head. The total mass of a golf club head is the sum of the total structural mass and the total free setting mass. Structural quality generally refers to the quality of material that is structurally resilient to allow the head to withstand repeated impacts. Structural mass is dictated by design, so the designer has limited control over the specific mass distribution. Conversely, free-set quality is any additional quality (beyond the minimum structural requirements of the golf club head) that can be added to the club head design to impart custom performance and/or latitude to the club. There is a need in the art to provide all metal golf club heads with a way to maximize the freedom to set the weight for maximum head moment of inertia (MOI) and to shift the center of gravity (CG) down/back.

The present invention provides a golf club head comprising a hybrid material rear body and a metal front body combined with each other, the metal front body including a ball striking face and a surrounding frame. The rear body of the hybrid material comprises a fiber-reinforced thermoplastic composite elastic layer, a molded thermoplastic structural layer, a metal weight pad, and a metal weight fixed within the metal weight pad. After mixing materials, the body structure can be greatly Reducing structural mass helps to improve the distribution of free-set mass, thereby improving the MOI and CG of the golf club head.

Terms such as "first", "second", "third", "fourth" and the like in the description and claims are used to distinguish similar elements, and do not necessarily describe a specific sequence or order. It is understood that the terms so used are interchangeable under appropriate circumstances, and thus the embodiments described herein are capable of operation in a sequence other than that shown or described herein. Furthermore, the terms "comprising" and "having" and any variations thereof are intended to encompass non-exclusive inclusion, and thus a program, method, system, article, apparatus or device comprising a set of elements is not necessarily limited to such elements, and Other elements not expressly listed or included in such programs, methods, systems, articles, devices or devices may also be included.

Terms such as "left", "right", "front", "rear", "top", "bottom", "top", "bottom" and the like in the description and the scope of the patent application and the like belong to the description Sexual purpose does not necessarily refer to a permanent relative position. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that embodiments of the apparatus, methods, and/or articles of manufacture described herein can operate in a sequence other than as illustrated or described herein.

Before describing the embodiments of the present invention in detail, it should be emphasized that the application of the present invention and the detailed structural arrangement of components are not limited to those described below or shown in the drawings. The invention can be practiced in other embodiments and in various ways.

Various embodiments of hybrid material construction golf club heads are described below. The mixed material structure includes a metal front body and a mixed material rear body. One embodiment of the head includes a composite rear body with a metal weight pad. In these or other embodiments, the head rear body may include a fiber-reinforced thermoplastic composite elastic layer, a molded thermoplastic structural layer, and a metal weight secured within a metal weight pad. In another embodiment, the head rear body may comprise a composite material The material crown and the bottom have metal weights fixed in the metal weight pad. In many embodiments, the golf club head may be a golf wood club head (ie, a driver, fairway wood, hybrid).

In certain embodiments, the club head can be a driver. In such embodiments, the lie angle may be less than about 16 degrees, less than about 15 degrees, less than about 14 degrees, less than about 13 degrees, less than about 12 degrees, less than about 11 degrees, or less than about 10 degrees. Furthermore, in such embodiments, the head volume can be greater than about 400cc, greater than about 425cc, greater than about 450cc, greater than about 475cc, greater than about 500cc, greater than about 525cc, greater than about 550cc, greater than about 575cc, greater than about 600cc, Greater than about 625cc, greater than about 650cc, greater than about 675cc, or greater than about 700cc. In certain embodiments, the head volume may be about 400cc to 600cc, 425cc to 500cc, about 500cc to 600cc, about 500cc to 650cc, about 550cc to 700cc, about 600cc to 650cc, about 600cc to 700cc, or about 600cc to 800cc .

In certain embodiments, the club head may include a fairway wood. In such embodiments, the lie angle may be less than about 35 degrees, less than about 34 degrees, less than about 33 degrees, less than about 32 degrees, less than about 31 degrees, or less than about 30 degrees. Furthermore, in these embodiments, the lie angle may be greater than about 12 degrees, greater than about 13 degrees, greater than about 14 degrees, greater than about 15 degrees, greater than about 16 degrees, greater than about 17 degrees, greater than about 18 degrees, Greater than about 19 degrees or greater than about 20 degrees. For example, in certain embodiments, the lie angle may be between 12 and 35 degrees, between 15 and 35 degrees, between 20 and 35 degrees, or between 12 and 30 degrees .

In the embodiment of the present invention, if the club head is used for a fairway wood, the head volume is less than about 400cc, less than about 375cc, less than about 350cc, less than about 325cc, less than about 300cc, less than about 275cc, less than about 250cc, Less than about 225cc or less than about 200cc. In such embodiments, the head volume may be about 150cc to 200cc, about 150cc to 250cc, about 150cc to 300cc, Approximately 150cc to 350cc, approximately 150cc to 400cc, approximately 300cc to 400cc, approximately 325cc to 400cc, approximately 350cc to 400cc, approximately 250cc to 400cc, approximately 250cc to 350cc or approximately 275cc-375cc.

In certain embodiments, the heads of the present invention may be used in hybrid rods. In such embodiments, the lie angle may be less than about 40 degrees, less than about 39 degrees, less than about 38 degrees, less than about 37 degrees, less than about 36 degrees, less than about 35 degrees, less than about 34 degrees, less than about 33 degrees , less than about 32 degrees, less than about 31 degrees, or less than about 30 degrees. Furthermore, in these embodiments, the loft angle may be greater than about 16 degrees, greater than about 17 degrees, greater than about 18 degrees, greater than about 19 degrees, greater than about 20 degrees, greater than about 21 degrees, greater than about 22 degrees, greater than About 23 degrees, greater than about 24 degrees, or greater than about 25 degrees.

In embodiments of the present invention, if the head is used in a hybrid rod, the head volume is less than about 200cc, less than about 175cc, less than about 150cc, less than about 125cc, less than about 100cc, or less than about 75cc. In certain embodiments, the head volume may be about 100cc to 150cc, about 75cc to 150cc, about 100cc to 125cc, or about 75cc to 125cc.

10: club head

12: Ground

20: Panel

40: Variable Thickness Profile

100: club head

104: Front body

108: Rear Ontology

112: Crown

116: Bottom

120: hitting face

124: Heel

128: Toe

136: Surrounding Frame

140: Peripheral

144: hosel

148: Elastic Layer

152: elastic layer

152: Structural Layer

156: Structure Layer

156: Weight Pad

160: center point

164: High Hit Plane

168: Midplane

170: inner surface

172: outer surface

174: Flange

176: Pillow shaft

180: Ground

184: long axis

188: Surrounding area

190: Transition Area

192: Central Area

196: Variable Thickness Profile

200: Turbulator

202: Crown Parts

204: Crown Parts

206: outer surface

208: After Body

208: Bottom Parts

212: Weight Pad

212: cavity

214: Gasket

216: cavity

220: Metal heavy objects

224: Base

228: Hole

230: Fasteners

232: Hole

236: Front

240: Peripheral Department

244: Hole

244: Elastic Layer

248: Structural parts

250: Opening

252: Opening

252: Edge

261: Structural Tape

300: Method

310: Steps

320: Steps

330: Steps

The present invention relates to sports equipment, and more particularly to golf club heads and methods thereof.

Figure 1 is a bottom view of a hybrid golf club head.

FIG. 2 is a top view of the golf club head of FIG. 1 .

FIG. 3 is a rear view of the golf club head of FIG. 1 .

FIG. 4 is an exploded view of the golf club head of FIG. 1 .

FIG. 5 is a front plan view of the golf club head of FIG. 1 .

FIG. 6 is a rear plan view of the front body of the golf club head of FIG. 1 .

FIG. 7 is a rear view of the front body of the golf club head of FIG. 1 .

8 is an exploded view of the front and rear bodies of the golf club head of FIG. 1 .

9 is a cross-sectional view of the golf club head of FIG. 1 .

FIG. 10 is an enlarged view of the golf club head weight pad and weight of FIG. 1 .

FIG. 11 is an assembled view of the golf club head weight, fasteners and spacers of FIG. 1 .

FIG. 12 is an interior view of the rear body of the golf club head of FIG. 1 .

13 is another interior view of the rear body of the golf club head of FIG. 1 .

FIG. 14 is a flowchart of the method of manufacturing the golf club head of FIG. 1 .

Other aspects of the present invention can be learned by reference to the following detailed description and accompanying drawings.

The golf club head 100 embodiment depicted in FIGS. 1-10 has a metal front body 104 and a rear body 108 . The front body 104 and the rear body 108 are integrally fixed to form a substantially closed/hollow internal volume. Like a general golf wood club head, the golf club head 100 of the present invention also includes a crown 112 and a sole 116 , and can be divided into a heel 124 and a toe 128 .

In certain embodiments, golf club head 100 includes a metallic front body 104 and a composite rear body 108, wherein the rear body includes a woven fiber reinforced thermoplastic elastomeric layer 148, a molded thermoplastic structural layer 152, and a Metal weight pads 156 . Using a woven fiber reinforced thermoplastic elastic layer 148 in combination with a molded thermoplastic structural layer 152 may reduce structural mass compared to a similar head made entirely of metal.

The use of elastic layer 148 and structural layer 152 to reduce structural weight may be used to reduce the overall weight of club head 100 (thereby increasing club head speed and/or flight distance), or to increase the allowable weight on golf club head 100 Freely set the quality range. In one embodiment, the additional free-set quality gained from the use of composite elastic layer 148 and composite structural layer 152 may Reintroduced into the head 100 in the form of a metal weight pad 156 . Combining the metal weight pads 156 with the lightweight composite back body 108 allows the clubhead 100 to place most of the mass in a position that maximizes the MOI and CG, thereby increasing latitude and increasing distance.

1. Front body

4-7, the front body 104 of the club head 100 includes a ball striking face 120 for striking a golf ball. The front body 104 includes a peripheral frame 136 extending rearwardly from the periphery 140 of the ball striking face 120, giving the front body 104 a cup-like appearance. The surrounding frame 136 includes an inner surface 170 and an outer surface 172 . Additionally, the surrounding frame 136 may include a flange 174 that provides an attachment surface for connecting the front body 104 and the rear body 108 . The outer surface 172 of the front body 104 forms part of the crown 112 and sole 116 of the club head 100 when the front body 104 is combined with the rear body 108 . The front body 104 further includes a hosel 144 at the heel 124 of the golf club head 100 for receiving a golf club shaft or a shaft adapter.

In some embodiments, the ball striking face 120 and surrounding frame 136 may be integrally formed. In other embodiments, the ball striking face 120 and the surrounding frame 136 may be formed separately and then assembled together. In one embodiment, the ball striking face 120 is forged, the surrounding frame 136 is cast, and then the ball striking face 120 and the surrounding frame 136 are welded, brazed, plasma welded, low-power laser welding, and forged. or other suitable connection techniques.

In many embodiments, the front body 104 is made of a metallic material to facilitate the repeated impact stress from hitting a golf ball. In some embodiments, the material of the front body 104 can be stainless steel, titanium, aluminum, steel alloys (such as 455 steel, 475 steel, 431 steel, 17-4 stainless steel, horse nail steel), titanium alloys (such as Ti 7- 4. Ti 6-4, T-9S), aluminum alloy or composite material. In some embodiments, the ball face 120 of the golf club head 100 may be made of stainless steel, titanium, aluminum, steel alloys (eg, 455 steel, 475 steel, 431 steel, 17-4 stainless steel, horse tack steel), titanium alloys (eg Ti 7-4, Ti 6-4, T-9S), aluminum alloys, amorphous metal alloys or composites.

The front body 104 has a mass. In certain embodiments where the ball striking face 120 is separated from the surrounding frame 136 , the mass of the front body 104 is equal to the sum of the mass of the ball striking face 120 and the surrounding frame 136 mass. Depending on the material used for the front body 104, the mass of the front body 104 may range from 40 grams to 140 grams. In most embodiments, the mass of the front body 104 does not exceed 140 grams. In some embodiments, the mass range of the front body 104 may be 40 to 50 grams, 50 to 60 grams, 60 to 70 grams, 70 to 80 grams, 80 to 90 grams, 90 to 100 grams, 100 to 110 grams, 110 to 120 grams, 120 to 130 grams or 130 grams to 140 grams.

A. Batting face

5, 6 and 9, the front body 104 of the golf club head 100 includes a ball striking face 120 for hitting a golf ball. The ball striking face 120 includes a center point 160 , a high strike plane 164 and a mid-plane 168 . The center point 160 is equidistant from the crown 112 and sole 116 of the club head 100 and is equidistant from the edge of the face closest to the toe 128 and the edge of the striking face 120 closest to the heel 124 . The high hitting plane 164 is tangent to the center point 160 of the hitting face 120 of the club head 100 . High strike plane 164 intersects ground 180 .

The thickness of the striking face 120 of the club head 100 is the distance between the striking face 120 and the inner surface 170 of the front body 104 . The thickness of the face 120 varies at different locations, thus defining a variable face thickness (VFT) or variable thickness profile 196 . The variable thickness profile 196 has a central region 192 and a peripheral region 188 . In many embodiments, the central region 192 of the variable thickness profile 196 is oval, oval, or egg-shaped. The central area 192 is approximately oval in shape, and is adjacent to the ball striking face 120. Portions near the sole 116 and heel 124 extend to portions of the striking face 120 proximate the toe 128 and crown 112 .

Referring to FIG. 6 , the central area 192 extends across or at or near the center point 160 of the ball striking face 120 such that the center point 160 of the ball striking face 120 is located within the central area 192 . The central region 192 contains the maximum thickness of the ball striking face 120 . In many embodiments, the thickness of the central region 192 remains substantially uniform. The peripheral region 188 is located around the outer perimeter 140 of the ball striking face 120 and includes the minimum thickness of the ball striking face 120 . In many embodiments, the thickness of the peripheral region 188 remains substantially uniform. The thickness of the ball striking face 120 in the central region 192 is greater than the thickness of the ball striking face 120 in the peripheral region 188 . The transition region 190 is located between the central region 192 and the peripheral region 188 . The transition region 190 includes varying thicknesses, creating a transition between the central region 192 and the peripheral region 188 .

In addition, the long axis 184 of the ball striking face 120 generally extends from the heel portion 124 to the toe portion 128 . The major axis 184 intersects the center point 160 and forms an angle β with the ground. In many embodiments, the major axis 184 reflects the elliptical shape of the central region 192 .

The angle formed by the long axis 184 and the ground 180 is about 20 degrees. For example, the angle formed between the long axis of the central region 192 and the ground 180 may be 0 to 60 degrees. In certain embodiments, the angle formed between the long axis 184 of the central region 192 and the ground 180 may be 2 to 20, 2 to 30, 5 to 40, 10 to 50, or 15 to 60 degrees. In other embodiments, the angle between the long axis 184 and the ground 180 may be 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59 or 60 degrees. The angular inclination of the central region 192 may cause the elongated portion of the egg shape to extend toward the high CT value portion above the toe of the ball striking face 120, thereby improving ball speed.

The oval or oval or egg shape, along with the angle of the central region 192 of the variable thickness profile 196, may allow the thickened area of the face 120 to be located in a region where the CT itself is higher and the thinned area of the face 120 to be at the CT the lower area itself. Accordingly, the area with high CT itself on the hitting face will decrease, and the area with low CT itself will increase, so that the CT of the entire hitting face 120 is normalized. In many embodiments, the variable thickness profile 196 results in a characteristic time of less than 115 microseconds (μs), less than 110 μs, less than 105 μs, less than 100 μs, less than 95 μs, less than 90 μs, or less than 85 μs. Again, in many embodiments, the variable thickness profile 40 results in an average feature time greater than 230 μs, greater than 235 μs, or greater than 240 μs. For example, in many embodiments, the average CT of panel 20 may be 230 μs to 240 μs, 235 μs to 240 μs, or 240 μs to 245 μs.

Furthermore, the angle of the VFT is designed to place the thickened area of the face 120 at the desired location, thereby reducing the weight of the face 120 compared to a face without the variable thickness profile 196 described above. Additional free-set weights can be re-directed to other areas of the clubhead to adjust the clubhead's CG position and increase the clubhead's moment of inertia for improved clubhead performance. The head 100 with the variable thickness profile 196 in the illustrated embodiment saves 2.1 grams of weight as compared to a similar head without the variable thickness profile 196, as described herein.

B. hosel

The golf club head 100 front body 104 includes the hosel 144 . The hosel 144 includes a hosel shaft 176 extending along the center of the hole in the hosel 144 . 3 and 6, in this example, the hosel coupling mechanism of the golf club head 100 includes the hosel 144 and a bushing (not shown), which can be coupled to the golf shaft (not shown) end. The hub can be coupled to the hosel 144 in a variety of configurations, thereby enabling the golf shaft to be secured to the hosel 144 at various angles relative to the hosel shaft 176 . but in other In an example, the shaft may be fixed to hosel 144 in a non-adjustable manner. In the illustrated embodiment, the hosel shaft 176 encloses an angle α with the ground surface 12 from the front view of the golf club head 10 ( FIG. 1 ). The angle α is shown as about 60 degrees, but in other configurations, the angle α can be about 40 to 80 degrees (eg, about 40 degrees, about 45 degrees, about 50 degrees, about 55 degrees, about 60 degrees, about 65 degrees, about 70 degrees, about 75 degrees, or about 80 degrees).

In addition, the hosel shaft 176 and the long axis 184 define an angle θ. In many embodiments, the angle θ formed between hosel shaft 176 and long axis 184 may be 60 and 140 degrees. In most embodiments, the minimum angle θ formed between hosel shaft 176 and long axis 184 is about 60 degrees. In certain embodiments, the angle θ formed between the hosel shaft 176 and the long axis 184 may be 60 to 70 degrees, 70 to 80 degrees, 80 to 90 degrees, 90 to 100 degrees, 100 to 110 degrees, 110 degrees to 120 degrees, 120 to 130 degrees, or 130 to 140 degrees. In one embodiment, the angle θ formed between the hosel shaft 176 and the long axis 184 may be 80 to 90 degrees.

C. Surrounding frame

The peripheral frame 136 of the front body 104 of the golf club head 100 extends rearwardly from the entire periphery 140 of the ball striking face 120 . The peripheral frame 136 further includes a flange 174 operable to couple the front body 104 to the rear body 108 .

Flange 174 provides an overlapping surface upon which rear body 108 can be attached. The flanges 174 extend rearwardly from the entire surrounding frame 136 and form a stepped structure, descending from the outer surface 172 of the surrounding frame 136 . In many embodiments, the function of the flange 174 of the front body 104 is to allow the rear body to partially overlap the flange 174 after epoxiing, gluing, welding, gluing, laser assisted metal plastic welding, brazing, or any other suitable connected to the front body 104 by the connection method. Utilize lap bumps The lip 174 ensures that the front body 104 and the rear body 108 are securely mated without the use of any mechanical fasteners.

In addition, the surrounding frame 136 includes an outer surface 172 and an inner surface 170 that may provide additional aerodynamic features to improve the overall speed of the golf club head. The surrounding frame 136 of the golf club head 100 front body 104 may include additional aerodynamic features, such as turbulators 200 . The turbulator 200 may be used to reduce club head drag and increase club 100 speed. Turbulator 200 is described in detail in US Patent No. 9,555,294, which is incorporated herein by reference in its entirety.

2. After body

4 and FIGS. 8 to 13 , the rear body 108 of the club head 100 includes a crown member 204 , a sole member 208 and a weight pad 212 . Crown member 204 and sole member 208 are integrated to form a portion of crown 112 and sole 116 of golf club head 100 . When the front body 104 is combined with the rear body 108 , the outer surface 172 of the front body 104 , the crown member 204 and the sole member 208 form the entire crown 112 and sole 116 of the golf club head 100 . The bottom part 208 of the rear body 108 may further include a composite elastic layer 152 , a composite structural layer 156 and a metal weight pad 212 .

In this design, the rear body 108 may comprise a blend of a molded thermoplastic (eg, injection molded thermoplastic) and a fiber-reinforced thermoplastic composite. As used herein, molded thermoplastics rely on the polymer itself to provide structure and rigidity to the final assembly. Molded thermoplastic materials are formed by molding techniques such as injection molding to allow the material to assume a free-flowing state when heated to temperatures above the polymer's melting point. Molded thermoplastic materials into which filler materials are incorporated are referred to as filled thermoplastic (FT) materials. Filled thermoplastics are free-flowing in the heated/melted state. To promote flow characteristics, the filler material generally includes a maximum dimension less than about 25 mm, or more commonly For isolated particulate matter less than about 12 mm. For example, the filler material may comprise discrete particulate matter having a maximum dimension of 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm or 10 mm. Filler materials suitable for this design may be, for example, glass beads or discontinuous reinforcing fibers composed of carbon, glass, or aramid polymers.

In contrast to molded and filled thermoplastic materials, fiber reinforced composite (FRC) materials typically include one or more layers of unidirectional or multidirectional fiber cloth extending across a majority of the area of the polymer. Unlike the reinforcing fibers used in FT materials, the fibers used in FRC can be larger/longer in maximum dimension and of sufficient size and properties to be a continuous cloth separate from the polymer. When formed with thermoplastic polymers, the continuous fibers contained therein generally do not flow even when the polymer has melted to flow.

FRC materials are typically formed by first placing the fibers in the desired arrangement and then imbibing the fiber material in a sufficient amount to create a rigid polymeric material. In this manner, the resin content of the FT material can be greater than about 45% by volume or more preferably greater than about 55% by volume, while the resin content of the FRC material is preferably less than about 45% by volume, or more preferably less than about 35% by volume. %Volume ratio. Traditionally, the polymer matrix of FRC materials is a two-part thermoset epoxide, but thermoplastic polymers can also be used as the matrix. In many cases, the FRC material is pre-prepared prior to final fabrication, and this intermediate material is often referred to as a prepreg. If a thermosetting polymer is used, the prepreg is partially cured to an intermediate form, and the final curing is performed when the prepreg is formed into its final shape. If a thermoplastic polymer is used, the prepreg may comprise a cooled thermoplastic matrix, which is then heated and molded into the final shape. This technique can be used to fabricate complex and lightweight geometries like the rear body 108 without sacrificing strength.

A. Crown parts

The rear body 108 includes a crown member 204 . 4 and 9, the crown member 204 includes an outer surface 206 such that when the rear body 108 is engaged with the front body 104, the outer surface 206 of the crown member 204 and the outer surface 172 of the surrounding frame 136 form the outer surface of the golf club head 100. The entire crown 112 . The outer surface 206 of the crown member 204 generally has a curved shape that is concave with respect to the ground surface 180 . The curvilinear shape of the crown member 204 allows the rear body 208 to be seamlessly joined to the front body 104 when the crown member is entirely placed on the flange 174 of the front body 104 .

In many embodiments, the crown member 204 is constructed of carbon fiber fabric without any composite or unidirectional composite sandwich. In one embodiment, the shaped fiber-reinforced composite from which crown component 204 is made may include a woven glass or carbon fiber reinforcement layer embedded in a polymer matrix. In such embodiments, the polymer matrix is preferably a thermoplastic material such as polyphenylene sulfide (PPS), polyetheretherketone (PEEK), or polyamide, such as PA6 or PA66. In other embodiments, the material of the crown member 204 may be a filled thermoplastic material with embedded glass beads or a filler of discontinuous glass, carbon or aramid polymer fibers, the basic thermoplastic material of which may be, for example, , polyphenylene sulfide (PPS), polyetheretherketone (PEEK) or polyamide. In other embodiments, the crown component 204 may be constructed of a hybrid material that combines a filled thermoplastic material and a formed fiber-reinforced composite material.

B. Bottom part

The rear body 108 includes a bottom member 208 . 4 and 9, the sole member 208 includes the structural layer 156 and the elastic layer 152, providing a lightweight but strong sole 116 of the golf club head 100. The elastic layer 152 is tangent to the ground surface 180 and the structural layer 156 is located on top of the elastic layer 152 and inside the golf club head 100 .

In one embodiment, the mixed material construction of the bottom member 208 has both the fiber-reinforced thermoplastic composite elastic layer 152 and the molded thermoplastic structural layer 156 . In a preferred embodiment, the molded thermoplastic structural layer 156 may be formed using a filled thermoplastic material such as polyphenylene sulfide (PPS), polyetheretherketone (PEEK), or polyamide ( Glass beads or discontinuous glass, carbon or aromatic polyamide polymer fiber fillers are embedded in thermoplastic materials such as PA6 or PA66). The elastic layer 152 may comprise a woven glass, carbon fiber or aromatic polyamide polymer fiber reinforcement layer embedded in a thermoplastic polymer matrix including, for example, polyphenylene sulfide (PPS), Polyetheretherketone (PEEK) or polyamide, such as PA6 or PA66. In a particular embodiment, the crown member 202 and the elastic layer 152 may each comprise a woven carbon fiber cloth embedded in polyphenylene sulfide (PPS), and the structural layer 156 may comprise a filled polyphenylene sulfide (PPS) polymer.

The structural layer 156 may generally include a front portion 236 and a peripheral portion 240 that defines the periphery of the bottom member 208 . When the club head 100 is assembled, the front portion 236 is coupled to the metal front body 104 , and the outer peripheral portion 240 is coupled to the crown member 204 . The structural layer 156 has a plurality of holes 244 within the outer perimeter, each extending through the thickness of the structural layer 156 . Furthermore, the structural layer 156 may include one or more structural members 248 extending from the front portion 236 between at least two of the aforementioned holes 244 . Additionally, as described below, the structural layer 156 may be configured to include a metal weight pad 212 and a metal weight 220 .

The elastic layer 152 can be combined with the structural layer 156 to directly abut or cover at least a part of the front portion 236 , the peripheral portion 240 and the plurality of structural members 248 . Thereby, from the outside of the club head 100 , the elastic layer 152 can completely cover each of the plurality of holes 244 . Likewise, the interior of the elastic layer 244 may contain one or more structural members 248 as optional reinforcing structures, similar to reinforcing ribs or gussets.

With regard to the polymeric construction of both the crown member 204 and the base member 208, the filled thermoplastic or fiber-reinforced thermoplastic composite used preferably comprises one or more materials with sufficient The strength and/or strength/weight ratio properties of engineering polymers that can withstand normal use while helping to reduce design weight. Specifically, the material of the golf club head 100 must be able to effectively withstand the stresses generated by the impact between the ball striking face 120 and the golf ball without causing a substantial increase in the overall weight of the golf club head 100 . In general, preferred polymers should have yielded tensile strengths greater than about 60 MPa (pure polymer), and when fillers are included, have yielded tensile strengths greater than about 110 MPa, or more preferably greater than about 180 MPa, and More preferably, it is greater than about 220 MPa. In certain embodiments, suitable filled thermoplastic polymers can have a yielded tensile strength of from about 60 MPa to about 350 MPa. In certain embodiments, the density of these polymers in the filled and unfilled states can be from about 1.15 to about 2.02, and the melting temperature is preferably greater than about 210°C, or more preferably greater than about 250°C.

C. Weight pad

Referring to FIGS. 4 and 9-11 , in many embodiments, the structural layer 156 may include a weight pad 212 . The weight pad 212 includes a cavity 216 for receiving a metal weight 220 . In some embodiments, the weight pad 212 is generally disposed toward the rearmost end of the club head 100 , and thus may be integrated and/or directly coupled to the rear portion 132 of the structural layer 156 . In certain embodiments, the elastic layer 152 may have a hole or opening 252 through which a portion of the weight pad 212 extends. In certain embodiments, the aforementioned opening 250 is separated from the front body 104 by a minimum distance of at least 25 millimeters, or at least 30 millimeters, or at least 35 millimeters (measured along the outer surface of the head). As shown in FIG. 9 , when assembled, the outer surface of the weight pad 212 may be flush with the immediately adjacent outer surface of the bottom member 208 and/or the elastic layer 152 . In this manner, a portion of the weight pad 212 may form a portion of the outboard sole 116 of the golf club head 100 . Additionally, in certain embodiments, the inner surface of the weight pad 212 may be exposed to the interior of the club head. The function of the weight pad 212 is to provide a dense rearward mass to improve the overall MOI of the golf club head. Due to the composite rear body 108 The weight is greatly reduced, so the freely set mass can be concentrated in the area where the weight pad 212 and the weight 220 are located.

The weight pad 212 may comprise any desired shape that maximizes the placement of mass on the outer perimeter of the rear portion 132 of the golf club head 100 as possible. The weight pad 212 shape may be any of the following: circle, triangle, square, rectangle, trapezoid, pentagon, curve, peach, or any other polygonal shape or shape with at least one curved surface. In one embodiment, the weight pad 212 may be substantially trapezoidal. In another embodiment, the weight pad 212 may be slightly rectangular. In addition, in another embodiment, the weight pad 212 may be slightly circular. Alternatively, in another embodiment, the weight pad 212 may be slightly triangular.

In most embodiments, the weight pad 212 may be metallic, thereby providing a dense rearward portion to improve the overall MOI of the golf club head 100 . In some embodiments, the material of the weight pad 212 can be stainless steel, titanium, aluminum, steel alloys (such as 455 steel, 475 steel, 431 steel, 17-4 stainless steel, horse nail steel), titanium alloys (such as Ti7 -4, Ti 6-4, T-9S), aluminum alloy or composite material. In one embodiment, the weight pad 212 may be stainless steel. The weight pads 212 may be forged or cast and then secured within the bottom member 208 of the rear body 108 .

The weight pads 212 are secured within the openings 250 in the elastic layer 152 via one or more techniques that provide a secure structural bond. Due to the difference in material type/material surface energy, and the relatively high component mass and contact surface area, conventional adhesives alone may not be able to withstand the forces generated during the impact of the golf club on the golf ball. To solve this problem, at least a portion of the weight pad can be integrated into the structural layer 156 and/or the elastic layer 152 by packaging at least a portion of the weight pad. In this way, the material strength of the encapsulation layer can bring about a more durable and reliable bonding effect than using the surface adhesive alone. 9 and 13, suitable packaging methods may include wrapping the edge 252 of the weight pad 212 with structural tape 261, directly wrapping at least a portion 212 of the weight pad within the structural layer 156, or wrapping the weight A portion of the pad is wrapped between adjacent layers of elastic layer 152 . The techniques described above may be used in place of or in combination with chemical glue between the weight pads and the bottom member 208 .

In one configuration, the weight pads 212 may be attached to the bottom member 208 without the use of any mechanical fasteners. In one embodiment, the weight pad 212 is cast, and the structural layer 156 is formed at at least the edge 252 of the weight pad 212 via, for example, injection molding or co-molding techniques. As noted above, the filled thermoplastic construction of structural layer 156 is capable of forming complex geometries and extending around edges in a structurally stable manner, and is therefore particularly suitable for receiving weight pads 212 . Depending on the geometry of the weight pads, this attachment technique may be difficult to achieve with fixed shape tape or FRC.

The counterweight pad 212 cavity 216 extends inwardly from the counterweight pad 212 . In the illustrated embodiment, the cavity 216 is circular. In other embodiments, the cavity 216 may comprise any shape. For example, the cavity 216 shape may comprise a circle, an ellipse, a triangle, a rectangle, an octagon, or any other polygonal shape or shape having at least one curved surface. The cavity 216 forms a recess into which the metal weight 220 can be secured. The metal weight 220 can add a freely set weight to the golf club head 100 , thereby further improving the MOI and CG of the golf club head 100 . In addition, through the arrangement of the cavity 216 and the metal weights 220 , different metal weights with different densities can be movably attached to the golf club head 100 to change its overall weight.

The depth of the cavity 212 is measured from the base 224 of the cavity 212 in a direction approximately perpendicular to the base 224 to the outer contour of the bottom member 208 . In many embodiments, the depth of cavity 212 is between 0.10 inches and 0.50 inches. In certain embodiments, the cavity 212 is less than 0.50 inches, less than 0.45 inches, less than 0.40 inches, less than 0.35 inches, less than 0.30 inches, less than 0.25 inches, less than 0.20 inches, or less than 0.15 inches deep .

Furthermore, cavity 212 includes holes 228 in substrate 224 . Aperture 228 extends inwardly from base 224 of cavity 212 toward crown 112 of golf club head 100 . In certain embodiments, the holes 228 may include threads that mate with the threads of the fasteners 230 to secure the metal weight 220 within the cavity 216 . In other embodiments, the holes 228 may not be threaded, but used with self-tapping or self-drilling fasteners.

Metal weights 220 may be positioned in the cavity 216 of the weight pad 212 . In the illustrated embodiment, the weight 220 is circular to correspond to the shape of the cavity 212 . In other embodiments, the weights 220 may comprise any geometric shape corresponding to the shape of the cavity 212 (eg, circle, ellipse, triangle, rectangle, trapezoid, octagon, or any other polygonal shape or shape having at least one curved surface). shape).

The metal weight 220 further includes a hole 232 extending through the entire weight 220 . The hole 232 is substantially the same size as the hole 228 of the cavity 212 , and when the weight is placed in the cavity 212 , the hole 232 of the weight 220 is aligned with the hole 228 of the cavity 212 . In most embodiments, the holes 232 do not have threads, so that the fasteners 230 can be fixed to the holes 228 of the weight pad 212 through threads after passing through the weights 220 . In addition, in some embodiments, the spacer 214 can be disposed in the cavity 212 first, and then the metal weight 220 is placed in the cavity 212 .

D. Assembly

14 depicts a method 300 of manufacturing a golf club head 100 having an integrally bonded elastic layer 152, a structural layer 156, and a metal weight pad 220 of the sole member 208 in one embodiment. The method 300 includes thermoforming a fiber-reinforced thermoplastic composite into the shell portion of the head 100 at step 310 . The thermoforming procedure may involve, for example, preheating a thermoplastic prepreg to a forming temperature at least above the glass transition temperature of the thermoplastic polymer, forming the prepreg into a shell shape. shape and then trim the formed part to the appropriate size.

After the composite material shell is formed into an appropriate shape, in step 320 , the filled polymer support structure can be directly contacted with the shell by means of injection molding. This process is usually called insert molding. In this process, the housing is placed directly in a heated mold with a gate cavity exposed to a portion of the housing. The molten polymer is forced into the cavity to mix directly with the polymer in the molten state of the heated composite shell, or to partially bond with the shell in a softened state. After the model cools, the composite shell and the polymer of the support structure harden together to form a welded relationship. If the polymer of the shell and the polymer of the support structure are compatible with each other, the bonding effect is better, and if the two components include a common thermoplastic resin component, the bonding effect is further improved. While insert forming is the preferred technique for forming the structure, other molding techniques, such as compression forming, may also be used.

14, after forming the base member 208 through steps 310 and 320, the FRC crown member 204 may be bonded to the base member 208 to substantially complete the structure of the rear body 108 (step 330). In a preferred embodiment, the material of the crown member 204 may be thermoplastic FRC material, and is formed into the desired shape using a thermoforming technique similar to that described in step 310 . The crown member 204, which is made of thermoplastic composite material, can be joined to the base member 208 by local welding techniques. Such welding techniques may be, for example, laser welding or ultrasonic welding, and resistance welding may also be used if the polymer is electrically conductive. If the crown component 204 is formed from a thermoset polymer, the crown component 204 may be bonded to the base component 208 using, for example, glue or mechanical fixation techniques (studs, screws, screws, mechanical interference engagement, etc.).

Then in step 340 , the rear body 108 including the fixed rear crown part 204 and the bottom part 208 may be bonded to the metal front body 104 . Although the adhesive can hold most metals, one or more adhesion promoters or surface treatments may be required to strengthen the bond between the adhesive and the polymer of the rear body 108 combination.

3. Advantages

Utilizing a mixed-material post-body construction can significantly reduce structural weight without sacrificing any design flexibility and provide a reliable way to reintroduce free-set mass. While this design can be made entirely from filled thermoplastics, such as polyphenylene sulfide (PPS), as described above, the use of fiber-reinforced composites can provide a stronger and lighter construction on a continuous outer surface. Conversely, an all-FRC design cannot be easily incorporated into the weight-receiving structure, and thus cannot be easily utilized to increase free-set mass.

The advantage of hybrid golf club heads with metal weight pads over those without metal weight pads is that the metal weight pads allow for changing and replacing metal weights while providing a durable and reliable metal weight installation Location. Compared with the golf club head without the metal weight pad, the metal weight pad can withstand the torsional force acting on the weight pad when the weight is attached. Furthermore, the metal weight pads are available for manufacturers to adjust manufacturing tolerances by replacing metal weights (that is, even if the ideal swing weight of the overall club head varies between 206 grams and 209 grams), or according to customer demand specifications ( For example, golfers may have their club heads weighted, 206 grams to 209 grams).

Replacement of one or more of the claimed elements will constitute a modification, not a repair. Furthermore, this specification has described benefits, other advantages, and solutions to problems of the present application with reference to specific embodiments. However, such benefits, advantages, solutions to problems and any elements that may cause or accentuate such benefits, advantages or solutions should not be construed as critical, required or essential features or elements of the scope of any or all claims, Unless such benefits, advantages, solutions or elements are expressly mentioned in the scope of the claims.

As the rules of golf may evolve over time (for example, golf standards organizations and/or governing entities such as the United States Golf Association (USGA), Royal and Ancient Golf Club of St. Andrews (R&A), etc. may adopt new rules or phase out or modify old rules) , the apparatus, methods, and golf equipment described herein may or may not meet the rules of golf at a particular point in time. Accordingly, the apparatus, methods, and golf equipment described herein may be advertised, sold, and/or sold as compliant or non-compliant golf equipment. The devices, methods, and articles of manufacture described herein are not limited in this regard.

The above examples use golf clubs as an example, and describe the apparatus, methods and articles of manufacture thereof. The devices, methods, and articles of manufacture described herein may also be applied to other types of sporting goods, such as hockey sticks, tennis rackets, fishing rods, ski poles, and the like.

In addition, the above-mentioned embodiments and/or limitations, if they meet the following conditions, are not contributed to the public based on the principle of contribution: (1) are not explicitly claimed in the scope of the patent application; and (2) the scope of the patent application is based on the theory of equality Equivalents or partial equivalents of the elements and/or limitations described herein.

The various features and advantages of the present invention are described in the following clauses:

Clause 1: A golf club head comprising: a metal front body, including a ball striking face and a surrounding frame extending rearwardly from the outer periphery of the ball striking face; wherein the ball striking face has a center point, an edge a loft plane tangent to the center point from the ball striking face, and a midplane extending from the heel through the center point to the toe and perpendicular to the loft plane; a rear body coupled to the The metal front body, wherein the rear body and the front body form a substantially hollow structure with a cavity therebetween; the rear body includes a crown part and a bottom part, wherein the bottom part is coupled to the crown part, wherein The base member includes: a structural layer forming a filled thermoplastic material, the structural layer including a plurality of holes extending through the thickness of the structural layer; and an elastic layer bonded to the structural layer an outer surface of the structural layer such that the elastic layer extends across each of the plurality of holes, wherein the elastic layer is formed of a fiber-reinforced thermoplastic composite and defines an opening; a metal weight pad extending at least partially through the elastic layer The opening is combined with the structural layer, wherein the metal weight pad includes a hole for a metal weight to be installed; and wherein the structural layer and the elastic layer each include a common thermoplastic resin component, and wherein the structural layer is Directly bonded to the elastic layer without the use of an intermediate glue.

Clause 2: The golf club head as described in Clause 1, wherein the metal front body further includes a flange retracted from the outer surface of the surrounding frame; wherein the structural layer of the sole member is bonded to and wherein the outer surface of the elastic layer of the bottom member is flush with the outer surface of the surrounding frame.

Clause 3: The golf club head as recited in Clause 2, wherein the metal front body further includes an extension wall coupling the surrounding frame to the flange; wherein the structural layer of the sole member includes a structure member extending from the weight pad toward the metal front body; wherein the structural member is operable to cause a dynamic load between the weight pad and the extension during impact between the ball striking face and a golf ball transfer between walls.

Clause 4: A golf club head as described in any one of Clauses 1-3, comprising a head center of gravity at a position measured from the hi-hit plane in a direction perpendicular to the hi-hit plane at the head CG depth and at a head CG height measured from the midplane in a direction perpendicular to the midplane; wherein the head CG depth is greater than 1.7 inches.

Clause 5: The golf club head as described in any one of Clauses 1-4, wherein the metal front body further comprises a ball striking face insert and a receiving frame; wherein the density of the receiving frame is greater than that of the ball striking face Insert.

Clause 6: The golf club head as described in any one of Clauses 1-5, wherein the mass of the front body does not exceed 140 grams and the total mass of the golf club head does not exceed 210 grams.

Clause 7: The golf club head as described in any one of Clauses 1-6, wherein a mechanical fastener secures the metal weight in the hole of the metal weight pad; wherein the metal weight in the structural layer The hole of the weight pad contains threads, and the metal weight does not have threads.

Clause 8: The golf club head as described in any one of Clauses 1-7, wherein the mass of the metal weight is in the range of 5 grams to 30 grams.

Clause 9: A golf club head, comprising: a metal front body, including a ball striking face and a surrounding frame extending rearwardly from the outer periphery of the ball striking face; wherein the ball striking face has a center point, an edge a loft plane tangent to the center point from the ball striking face, and a midplane extending from the heel through the center point to the toe and perpendicular to the loft plane; a rear body coupled to the The metal front body, wherein the rear body and the front body form a substantially hollow structure with a cavity therebetween, the rear body includes a crown part and a bottom part, wherein the bottom part is coupled to the crown part, wherein the The bottom member comprises: a structural layer made of a filled thermoplastic material and bonded to the crown member, the structural layer including a plurality of holes extending through the thickness of the structural layer; and an elastic layer bonded to the outer surface of the structural layer On the surface, without using an intermediate glue, the elastic layer can be pressed against the metal front body and extend across the plurality of holes; wherein the structural layer is formed of a first material, and the first material comprises a first material disposed on a first A first plurality of fibers in a thermoplastic polymer, and the elastic layer is formed of a second material, the second material comprising a second plurality of fibers disposed in a second thermoplastic polymer, wherein the first material in the The amount by volume of the first thermoplastic polymer is greater than the amount by volume of the second thermoplastic polymer in the second material; wherein the structural layer and the elastic layer each comprise a common thermoplastic resin component, and wherein the structural layer It is directly combined with the elastic layer without using an intermediate glue; and the structural layer of the bottom part includes a metal weight pad, wherein the metal weight pad includes a hole for a metal weight to be installed.

Clause 10: The golf club head as recited in Clause 9, wherein the metal front body further includes a flange retracted from the outer surface of the surrounding frame; wherein the structural layer of the sole member is bonded to the flange and wherein the outer surface of the elastic layer of the bottom member is flush with the outer surface of the surrounding frame.

Clause 11: The golf club head of any one of Clauses 9-10, wherein the metal front body further includes an extension wall for coupling the surrounding frame to the flange; wherein the bottom member of the The structural layer includes a structural member extending from the weight pad toward the metal front body; wherein the structural member is operable to place a dynamic load on the weight during impact between the ball striking face and a golf ball Transfer between the weight pad and the extension wall.

Clause 12: The golf club head of any one of Clauses 9-11, wherein the first thermoplastic polymer is directly bonded to the second thermoplastic polymer.

Clause 13: The golf club head of any one of Clauses 9-12, wherein the first plurality of fibers comprise a plurality of discontinuous fibers, each of the fibers having a largest dimension of less than 0.43 inches.

Item 14: The golf club head of any one of Items 9-13, wherein the second plurality of fibers comprise a plurality of fibers that are continuous and woven into a cloth.

Clause 15: The golf club head of any one of Clauses 9-14, wherein the first thermoplastic polymer and the second thermoplastic polymer are the same.

Clause 16: The golf club head of any one of Clauses 9-15, wherein the mass of the front body does not exceed 140 grams and the total mass of the golf club head does not exceed 210 grams.

Clause 17: A golf club head as described in any of Clauses 9-16, comprising a head center of gravity at a at the head CG depth and at a head CG height measured from the midplane in a direction perpendicular to the midplane; wherein the head CG depth is greater than 1.7 inches.

Clause 18: The golf club head as described in any one of Clauses 9-17, wherein the metal front body further comprises a ball striking face insert and a receiving frame; wherein the density of the receiving frame is greater than that of the ball striking face Insert.

Clause 19: A golf club head as described in any of Clauses 9-18, wherein a mechanical fastener secures the metal weight in the hole of the metal weight pad; wherein the metal weight in the structural layer The hole of the weight pad contains threads, and the metal weight does not have threads.

Clause 20: The golf club head as described in any one of Clauses 9-19, wherein the mass of the metal weight is in the range of 5 grams to 30 grams.

104: Front body

120: hitting face

144: hosel

152: Structural Layer

152: elastic layer

156: Structure Layer

156: Weight Pad

204: Crown Parts

206: outer surface

212: Weight Pad

212: cavity

236: Front

240: Peripheral Department

244: Hole

244: Elastic Layer

248: Structural parts

Claims (20)

A golf club head comprising: a heel portion, and a toe portion opposite the heel portion; a metal front body including: a ball striking face, and a peripheral frame extending rearwardly from the outer periphery of the ball striking face ; Wherein, the ball striking face has: a center point, a high hitting plane along the ball striking face and tangent to the center point, and a heel portion extending through the center point to the toe portion, and perpendicular to the The middle plane of the high strike plane; a rear body coupled to the metal front body, wherein the rear body and the metal front body form a substantially hollow structure with a cavity therebetween, wherein the rear body includes A crown member and a base member, wherein the base member is coupled to the crown member, and wherein the base member comprises: a structural layer made of a filled thermoplastic material having a thermoplastic resin component and a plurality of reinforcing fibers; and a metal weight pad, which is combined with the structural layer, wherein the metal weight pad includes a hole for a metal weight to be installed therein; and a head center of gravity, which is located at At a head CG depth measured from the high strike plane in a direction perpendicular to the high strike plane, and a head CG height measured from the mid-plane in a direction perpendicular to the mid-plane where the CG depth of the head is greater than 1.7 inches. The golf club head of claim 1, wherein the crown member has a crown structure layer formed of a filled thermoplastic material. The golf club head of claim 2, wherein the filled thermoplastic material forming the crown structural layer is the same filled thermoplastic material forming the structural layer of the sole member. The golf club head of claim 1, wherein the crown member has a plurality of continuous fibers woven into a cloth and embedded in a thermoplastic resin. The golf club head of claim 1, wherein: the crown member comprises a crown-filled thermoplastic layer and a crown elastic layer; the crown-filled thermoplastic layer is formed of a first material, the first The material includes a first plurality of fibers disposed in a first thermoplastic polymer, the crown elastic layer is formed of a second material, and the second material includes a second plurality of fibers disposed in a second thermoplastic polymer and the amount by volume of the first thermoplastic polymer in the crown-filled thermoplastic layer is greater than the amount by volume of the second thermoplastic polymer in the crown elastic layer. The golf club head of claim 5, wherein the first thermoplastic polymer and the second thermoplastic polymer share a thermoplastic resin component. The golf club head of claim 5, wherein: the first plurality of fibers comprise a plurality of discontinuous fibers, each of the fibers having a maximum dimension of less than 0.43 inches; and the second plurality of fibers comprise a plurality of continuous fibers woven into a single fabric fibers. The golf club head of claim 1, wherein the crown member exhibits a curved shape that is substantially concave with respect to the ground. 2. The golf club head of claim 1, wherein: the metal front body further includes a flange retracted from the outer surface of the surrounding frame; the structural layer of the sole member is bonded to the flange; and the sole member The outer surface is flush with the outer surface of the surrounding frame. 9. The golf club head of claim 9, wherein: the metal front body further includes an extension wall for coupling the surrounding frame to the flange; the structural layer of the sole member includes a structural member attached from the a metal weight pad extends towards the metal front body; and The structure is operable to transfer a dynamic load between the metal weight pad and the extension wall during impact between the ball striking face and a golf ball. The golf club head of claim 1, wherein: the metal front body further comprises a ball striking face insert and a receiving frame; and the density of the receiving frame is greater than that of the ball striking face insert. The golf club head of claim 1, wherein the mass of the metal front body does not exceed 140 grams, and the total mass of the golf club head does not exceed 210 grams. The golf club head of claim 1, wherein: a mechanical fastener secures the metal weight in the hole of the metal weight pad; the hole of the metal weight pad in the structural layer comprises threads; and the Metal weights do not have threads. The golf club head of claim 1, wherein the mass of the metal weight is in the range of 5 grams to 30 grams. The golf club head of claim 1, wherein a portion of the metal weight pad is encapsulated in the structural layer of the sole member to increase the bonding strength between the metal weight pad and the structural layer. The golf club head of claim 1, wherein; the golf club head further comprises an encapsulation layer between the metal weight pad and the structural layer of the sole member; and the encapsulation layer is a structural tape, which An edge of the metal weight pad is extended and covered, and a strong bond is formed between the metal weight pad and the structural layer of the bottom part. The golf club head of claim 1, wherein: the golf club head further comprises a rear portion; and The metal weight pad is directly combined with the edge of the structural layer at the rear portion. 2. The golf club head of claim 1, wherein: the metal weight pad extends through an opening in the structural layer of the sole member; and the opening is at least 25 millimeters apart from the metal front body. The golf club head of claim 18, wherein an inner surface of the metal weight pad is exposed to the interior of the golf club head. The golf club head of claim 1, wherein the metal weight pad comprises a material selected from the following metals: stainless steel, titanium, aluminum, steel alloys.

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