CN1253225C - A kind of golf club head and its manufacturing method - Google Patents

Abstract

A golf club head and a manufacturing method thereof, the manufacturing method comprises the following steps: positioning a sand core of a predetermined shape in a cavity of a mold; injecting wax liquid into the mould to prepare a wax mould, and coating the sand core with the wax mould; preparing a sand shell mold by dipping a wax mold and a sand core; heating to remove the wax mold in the sand shell mold; injecting molten metal into the sand shell mold; and removing the sand shell mold and the sand core to obtain the integrally formed club head body. Therefore, the club head body forms a long notch between the bottom plate and the counter weight block on the back of the striking face, thereby overcoming the defects of the prior art, not only having the advantages of easy manufacture, low center of gravity and no absorption of striking stress, but also greatly improving the elastic deformation capability and the elastic recovery coefficient of the striking face, leading the club head finished product to be suitable for long-distance striking, and leading the manufacturing process to be suitable for mass production.

Description

A kind of golf club head and its manufacturing method

technical field

The present invention relates to a golf club head and a manufacturing method thereof, in particular to a long notch formed integrally between the bottom plate of the club head body and the counterweight on the back of the ball hitting surface by using a sand core in the wax mold process, which can Improve the elastic deformation ability of the hitting surface, increase the hitting distance, and make the manufacturing process suitable for the mass-produced golf club head and its manufacturing method.

Background technique

Known one-piece golf iron club head structure, as shown in Figure 1 and Figure 2, it is to form a ball striking surface 11, a counterweight 12, a set of neck 13 on a club head body 10, this ball striking surface 11 The front side can be used for hitting a ball, the counterweight 12 can lower the overall center of gravity of the club head body 10 , and the sleeve neck 13 can be used to sleeve a golf club. Since the club head body 10 can be directly integrally formed by wax molding, there is no need for embedding or welding between the club head body 10 and the ball striking surface 11, so no tight fitting joints or welds will be formed. road. At the same time, when the ball striking surface 11 hits the ball, the integrated structure of the club head body 10 can also reduce and absorb the ball striking stress of the ball striking surface 11 . Although the club head body 10 has the advantages of being easy to manufacture and not absorbing the impact stress, since the counterweight 12 on the back side of the ball striking surface 11 is completely integrated with the bottom plate 101 of the club head body 10 (that is, both The area of the connection surface formed between them is too large), thus seriously affecting the elastic deformation ability of the ball striking surface 11, that is, greatly reducing its elastic recovery coefficient (coefficient of restitution, COR), resulting in the club head body 10 Unsuitable for long-range shots.

In view of this, the inventor aims at the many defects caused by the imperfection of the above-mentioned known golf club head and its manufacturing method, and draws on its many years of experience in related fields to conceive deeply and actively research ways to improve it. Efforts to improve the trial and develop the present invention.

Contents of the invention

The technical problem to be solved by the present invention is to provide a golf club head and its manufacturing method, which is to form a long slot between the bottom plate of the club head body and the counterweight on the back of the ball hitting face, so that the ball hitting face integrally formed The hitting area will have an elastically deformable buffer space, so that the present invention has the effect of increasing the elastic deformation capacity of the hitting face.

Another technical problem to be solved by the present invention is to provide a golf club head and its manufacturing method, which uses a sand core of a predetermined shape to directly form a long slot, and the sand core can be easily combined and used in various In the wax mold process of the club head body, the present invention has the effect of improving mass production and facilitating utilization.

Technical solution of the present invention is:

A method of manufacturing a golf club head, characterized in that it comprises the following steps:

positioning a sand core of predetermined shape in a cavity of a mold such that the club head body forms a long notch between a base plate and a counterweight on the back of a ball striking face; injecting wax liquid into the mold making a wax mold, and the wax mold covers the sand core;

A sand shell mold is prepared from the wax pattern and the sand core soaked in slurry; the sand shell mold is removed by heating;

pouring a molten metal into the sand shell mold; and

The sand shell mold and the sand core are removed to obtain an integrally formed club head body.

The sand core is provided with an ear and a positioning hole, and the cavity of the mold forms a positioning portion corresponding to the ear and the positioning hole.

The counterweight and the long slot span the bottom plate of the club head body and extend from the toe to the heel of the club head body.

The width of the long slot is between 0.5mm and 8.0mm.

The maximum thickness of the counterweight is greater than or equal to 2.5 times the thickness of the ball hitting face.

The distance between the center of gravity of the club head body and the bottom plate is kept less than or equal to 20 mm.

A shallow groove is formed along the inner periphery of the toe, the side plate, the top plate and the heel of the club head body on the back of the ball striking surface, and the shallow groove communicates with the long notch.

A golf club head is an integrally formed club head body. The golf club head includes: a ball striking surface integrally formed on the front of the club head body; a counterweight integrally formed on the golf club head The back of the spherical surface is adjacent to a bottom plate and a long notch of the club head body, and is arranged between the bottom plate of the club head body and the counterweight on the back of the ball striking surface.

The counterweight and the long slot span the bottom plate of the club head body and extend from the toe to the heel of the club head body.

The width of the long slot is between 0.5mm and 8.0mm.

The maximum thickness of the counterweight is greater than or equal to 2.5 times the thickness of the ball hitting face.

The distance between the center of gravity of the club head body and the bottom plate is kept less than or equal to 20 mm.

A shallow groove is formed along the inner periphery of the toe, the side plate, the top plate and the heel of the club head body on the back of the ball striking surface, and the shallow groove communicates with the long notch.

The features and advantages of the present invention are: the present invention utilizes sand cores to integrally form a long notch in the wax mold process of the club head body. It is heavy and effectively reduces the area of the connecting surface formed between the soleplate and the hitting surface. In this way, the one-piece club head body not only has the advantages of easy manufacture, low center of gravity and no impact stress absorption, but also greatly improves the elastic deformation capacity and elastic recovery coefficient of the ball hitting surface, making the finished club head suitable for long-distance hit the ball. The sand core of predetermined shape is directly integrally formed to form the long notch, and the sand core can be easily combined and used in the wax mold process of various club head bodies, so that the present invention has the effect of improving mass production and being easy to use. The shallow groove and the long notch are jointly arranged on the back periphery of the hitting surface, and at the same time reduce the cross-sectional size of the connecting position between the hitting surface and the club head body; thus the present invention can further improve the performance of the hitting surface Elastic deformation ability and its ability to hit the ball from a long distance.

Description of drawings

Fig. 1 is the front view of known golf iron club head structure;

Fig. 2 is a cross-sectional view of a known golf iron head structure;

Fig. 3 is a flow block diagram of the manufacturing method of the golf club head of the present invention;

Fig. 4 is a sectional view of the golf club head of the present invention;

5 is a perspective view of a sand core used in the manufacturing method of the golf club head of the present invention;

6 is a schematic diagram of the first step of the manufacturing method of the golf club head of the present invention;

7 is a schematic diagram of the second step of the manufacturing method of the golf club head of the present invention;

Fig. 8 is the rear view of the wax mold coated sand core of the second step of the present invention;

9 is a schematic diagram of the third step of the manufacturing method of the golf club head of the present invention;

10 is a schematic diagram of the fourth step of the manufacturing method of the golf club head of the present invention;

Fig. 11 is a sectional view of the golf club head of the present invention and its center of gravity;

Figure 12 is a rear view of the golf club head of the present invention.

Explanation of reference numbers:

10. Head body 101, base plate 102, toe 103, root

104. Side plate 105. Top plate 11. Hitting surface 12. Counterweight

13. Collar 14. Long notch 15. Shallow groove 10’. Rod head body

11', hitting face 12', counterweight 13', collar 14', long notch

20. Sand core 21. Ear part 22. Positioning hole 30. Mold

31. Mold cavity 32. Positioning part 33. Positioning pin 40. Sand shell mold

41. Mold cavity

Detailed ways

In order to make the above-mentioned technical solutions, features and advantages of the present invention more comprehensible, the preferred embodiments of the present invention are specifically cited below, together with the accompanying drawings, and detailed descriptions are as follows:

Fig. 3 is a flow block diagram showing the manufacturing method of the golf club head of the present invention; Fig. 4 is a sectional view showing the golf club head of the present invention; Fig. 5 is a perspective view showing the sand core used in the manufacturing method of the golf club head of the present invention; Fig. 6 A schematic diagram illustrating the first step of the manufacturing method of the golf club head of the present invention; FIG. 7 is a schematic diagram illustrating the second step of the manufacturing method of the golf club head of the present invention; FIG. 8 is a wax mold coated sand core revealing the second step of the present invention Fig. 9 is a schematic view showing the third step of the manufacturing method of the golf club head of the present invention; Fig. 10 is a schematic view showing the fourth step of the manufacturing method of the golf club head of the present invention; Fig. 11 is a schematic view showing the golf club head of the present invention and The sectional view of its center of gravity; FIG. 12 is a rear view showing the golf club head of the present invention.

Please refer to FIG. 3 to FIG. 5 , the structure of the golf club head of the present invention is mainly that a club head body 10 is integrally formed to form a ball striking surface 11 , a counterweight 12 , a set of neck 13 and a long notch 14 . Since the long notch 14 of the present invention is formed in an arc between the bottom plate 101 of the club head body 10 and the counterweight 12 on the back of the ball striking surface 11, it is not conducive to directly using the known wax molding process to form the long slot of the present invention. Port 14 of the club head body 10 . Therefore, the present invention further utilizes a sand core 20 with a preset shape in the wax molding process to overcome the above-mentioned problems, so that the wax molding process can smoothly form the club head body 10 with the arc-shaped long notch 14 .

Please refer to FIG. 3 to FIG. 6 , the first step of the golf club head and its manufacturing method of the present invention is to position the sand core 20 with a predetermined shape in the mold cavity 31 of the mold 30 . The present invention pre-prepares a sand core 20 with suitable materials such as gypsum, and makes the sand core 20 form the semi-arc shape of the long notch 14 of the club head body 10 of the present invention. Next, the sand core 20 is positioned in a cavity 31 of a mold 30 , and a positioning portion 32 and a positioning pin 33 are formed in the cavity 31 of the mold 30 at an appropriate position. At the same time, an ear portion 21 is formed on the top of the sand core 20 , and a positioning hole 22 is defined in the ear portion 21 . By means of the positioning hole 22 , the positioning portion 32 and the positioning pin 33 , the sand core 20 is stably suspended and positioned in the mold cavity 31 of the mold 30 .

Please refer to Fig. 3 to Fig. 5, Fig. 7 and Fig. 8, the second step of the golf club head and its manufacturing method of the present invention is to inject wax liquid into the mold 30 to make a wax mold 10', and the wax mold 10' covers the sand core 20. After the sand core 20 is positioned in the mold cavity 31 , the present invention injects the wax liquid into the mold cavity 31 through the sprue (not shown) of the mold 30 . After the wax liquid is solidified and formed, a wax mold 10' can be formed. The shape of the wax mold 10' is the same as that of the club head body 10, and also includes a ball striking surface 11', a counterweight 12', a set of Neck 13' and a long notch 14'. Then, the wax pattern 10' is demoulded, and the positioning pin 33 of the mold 30 is taken out, so that the sand core 20 is separated from the mold 30 at the same time. At this time, the sand core 20 is temporarily covered on the wax pattern 10', and is correspondingly located at the position of the long notch 14'.

Please refer to Fig. 3 to Fig. 5, Fig. 8 and Fig. 9, the third step of the golf club head and its manufacturing method of the present invention is to make the sand shell mold 40 by dipping the wax mold 10' and the sand core 20 into slurry. After the wax model 10' is made to cover the sand core 20, the present invention immerses the integrated wax model 10' and the sand core 20 in gypsum liquid or other viscous molding materials at the same time, so that the gypsum sticks to the wax model 10' and the outside of the sand core 20, thus forming a sand shell mold 40. Next, the sand shell mold 40 is dried in the shade or dried, so that the sand shell mold 40 is completely solidified and shaped.

Please refer to Fig. 3 to Fig. 5, Fig. 9 and Fig. 10, the fourth step of the golf club head and its manufacturing method of the present invention is to heat and remove the wax mold 10' in the sand shell mold 40. After the sand shell mold 40 is solidified and molded, the present invention then heats the sand shell mold 40 so that the wax pattern 10' in the mold melts into wax liquid, and flows out from the sprue (not shown) of the sand shell mold 40 . After the wax liquid is completely removed, a mold cavity 41 will be formed in the sand shell mold 40 . At this moment, the sand core 20 is still combined with the sand shell mold 40 by using the ear portion 21 and the positioning hole 22 at the top, so that the sand core 20 can be stably hung and set in the mold cavity 41 .

Referring to FIG. 3 to FIG. 5 and FIG. 10 , the fifth step of the golf club head and its manufacturing method of the present invention is to inject molten metal into the sand shell mold 40 . The present invention selects and uses appropriate metals or alloy materials according to product requirements. Next, heat to completely melt and liquefy the metal or alloy, and pour it into the sand shell mold 40 . After the metal or alloy is cooled and solidified, the club head body 10 can be produced in the present invention.

Please refer to FIG. 3 to FIG. 5 and FIG. 11 and FIG. 12, the sixth step of the golf club head and its manufacturing method of the present invention is to remove the sand shell mold 40 and the sand core 20 to obtain an integrally formed club head body 10 . When the present invention smashes the sand shell mold 40 and the sand core 20 with a suitable tool, and removes the debris, an integrally formed club head body 10 can be obtained, and the bottom plate 101 of the club head body 10 can be aligned with the ball. The long notches 14 are formed between the counterweights 12 on the back side of the surface 11 . Finally, the present invention can choose to trim, grind, polish and paint the club head body 10 by precision machining, so that the finished product has better appearance and consistent specifications.

Please refer to FIG. 4 , FIG. 11 and FIG. 12 , the integrated structure of the club head body 10 of the present invention can further isolate the bottom plate 101 of the club head body 11 from the back of the ball hitting surface 11 by the long slot 14 counterweight 12, and reduce the area size of the connecting surface formed between the bottom plate 101 and the counterweight 12, so that the central hitting area (including the sweet spot) of the hitting face 11 is maximized. The ability of elastic deformation (that is, the high elastic recovery coefficient of the ball hitting surface 11 ) can further improve the long-distance hitting ability of the club head body 10 of the present invention. At the same time, the method of forming the long notch 14 by using the sand core 20 of the present invention can also be quickly combined and used in the wax mold mass production process of various club head bodies 10 .

Please refer to Fig. 11 and Fig. 12 again, in order to maximize the elastic deformation ability (ie elastic recovery coefficient) and the hitting distance of the ball hitting surface 11 of the present invention, the club head body 10 and its counterweight 12, long groove The opening 14 is preferably selected to meet the following conditions: (1) make the counterweight 12 and the long notch 14 span the bottom plate 101 of the club head body 10 and extend from the toe of the club head body 10 (2) make the width a of the long notch 14 between 0.5 and 8.0 mm; (3) make the maximum thickness y of the counterweight 12 greater than or equal to the thickness x of the ball hitting surface 11 (4) Make the distance y' between the center of gravity of the club head body 10 and the bottom plate 101 less than or equal to 20mm (ie y'≤20mm), so as to reduce the overall center of gravity.

Furthermore, as shown in Figures 4, 8, 11 and 12, the back of the ball striking surface 11 of the present invention can also form a circle along the inner periphery of the toe 102, the side plate 104, the top plate 105 and the root 103 of the club head body 10. Shallow grooves 15 (shallow grooves 15' are formed corresponding to the wax pattern 10'). The shallow groove 15 is preferably connected to the long notch 14, and the shallow groove 15 and the long notch 14 are jointly arranged on the periphery of the back surface of the ball striking surface 11, and at the same time reduce the distance between the ball striking surface 11 and the club head body 10. The cross-sectional size of the connecting position enables the present invention to further improve the elastic deformation capability of the ball-hitting surface 11 and its long-distance hitting ability.

Although the present invention has been disclosed with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various changes and modifications without departing from the concept and scope of the present invention. Therefore, the present invention The protection scope of the invention shall be determined by the scope defined in the claims.

Claims (13)

1. A method for manufacturing a golf club head, characterized in that it comprises the following steps: positioning a sand core of predetermined shape within a cavity of a mold such that the club head body forms an elongated slot between a sole plate and a weight on the back of a ball striking face; Inject wax liquid into the mold to make a wax model, and the wax model covers the sand core; A sand shell mold is prepared from the wax pattern and the sand core soaked in slurry; the sand shell mold is removed by heating; Injecting a molten metal into the sand shell mold; and removing the sand shell mold and the sand core to obtain an integrally formed club head body. 2. The method of manufacturing a golf club head according to claim 1, wherein the sand core is provided with an ear and a positioning hole, and the cavity of the mold forms a positioning portion corresponding to the ear and the positioning hole. 3. The method of manufacturing a golf club head according to claim 1, wherein the weight and the long notch straddle the bottom plate of the club head body and extend from the toe to the heel of the club head body . 4. The method for manufacturing a golf club head according to claim 1, wherein the width of the long notch is between 0.5 and 8.0 mm. 5. The method of manufacturing a golf club head according to claim 1, wherein the maximum thickness of the weight is greater than or equal to 2.5 times the thickness of the ball striking surface. 6. The method of manufacturing a golf club head according to claim 1, wherein the distance between the center of gravity of the club head body and the bottom plate is kept less than or equal to 20mm. 7. The method of manufacturing a golf club head according to claim 1, wherein a shallow groove is formed on the back of the ball striking surface along the inner periphery of the toe, side plate, top plate and heel of the club head body, and The shallow groove communicates with the long notch. 8. A golf club head, an integrally formed club head body, characterized in that: the golf club head includes: a ball striking surface, which is integrally formed on the front of the club head body; A counterweight, which is integrally formed on the back of the ball hitting face, and is adjacent to a bottom plate and a long slot of the club head body, and is arranged on the bottom plate of the club head body and the counterweight on the back of the ball hitting face between blocks. 9. The golf club head of claim 8, wherein the weight and the elongated notch span the bottom plate of the club head body and extend from the toe to the heel of the club head body. 10. The golf club head according to claim 8, wherein the width of the long slot is between 0.5 and 8.0 mm. 11. The golf club head according to claim 8, wherein the maximum thickness of the weight is greater than or equal to 2.5 times the thickness of the ball striking face. 12. The golf club head according to claim 8, wherein the distance between the center of gravity of the club head body and the bottom plate is kept less than or equal to 20mm. 13. The golf club head according to claim 8, wherein a shallow groove is formed on the back of the ball striking surface along the inner peripheral edges of the toe, side plate, top plate and heel of the club head body, and the shallow groove The groove communicates with the long notch.

Images