TWI483761B - Manufacturing method of stainless steel golf head - Google Patents

Description

Stainless steel golf club head manufacturing method

The present invention relates to a method of manufacturing a golf club head, and more particularly to a method of manufacturing a stainless steel golf club head.

Generally speaking, golf clubs can be divided into three categories: wood poles, irons and putters. Currently, they are commonly used for wood heads and iron heads, mostly made of stainless steel. On the other hand, golf club heads are mostly made by precision casting, and most of the current precision castings are carried out in the atmosphere. The high-frequency induction melting furnace (High Frequency Induction Furnace) quickly melts the cast material and slag-forming. The refining step such as degassing removes the slag and gas in the molten metal solution, and then mixes it with static gravity, but the casting method has the following disadvantages:

(1) Since the smelting of the cast material is carried out by means of batching, the amount of various alloying elements is calculated according to the stainless steel alloy to be produced to reasonably match the raw materials, but the reactivity of various alloying elements with atmospheric oxygen or nitrogen is different. Therefore, it is necessary to adjust the order and time of addition for each alloying element of the cast material, so that the difficulty of operation is improved. Further, when the cast material contains an alloying element having a low melting point (for example, aluminum, manganese, ruthenium, etc.), it is easy to cause splashing during the process of melting the molten metal, resulting in loss of the cast material.

(2) After the molten casting material is melted, the refining step of slagging is required to collect the slag in the stainless steel metal liquid, but the slag forming process usually loses 2 to 3% of the total amount of smelting casting material. And the slagging step requires additional energy and will also increase the cost of casting.

(3) The molten stainless steel metal liquid needs to be treated with deoxidizer before casting. Degassing degassing step, and the effect of deoxidation will directly affect the properties of the alloy. When the deoxidation is insufficient, the golf club head casting will have pinholes, and excessive deoxidation may produce non-metallic impurities in the golf club head casting.

(4) Gravity casting, so additional materials are needed to maintain the soup-pressing effect, so as to increase the formability of the golf club head castings, and avoid the insufficient molding effect, resulting in poor molding; however, it is necessary to prepare additional materials and It takes a lot of energy to melt, which is one of the factors that make it difficult to reduce the cost of casting.

(5) In the process of casting, if the casting action is improperly controlled, the molten stainless steel metal liquid will overflow or splash from the pouring cup, resulting in waste of the casting material.

(6) After the casting is completed, the molten stainless steel metal liquid will form a cast containing three parts, including the pouring cup part, the flow path part and the casting part, after cooling and solidification, and only the casting part belongs to the foundry product, and the rest are For casting waste, the yield of the casting (yield, which is defined as: the total weight of the cast finished product / the total weight of the cast finished product and the foundry waste) has a problem that it is difficult to increase.

For the above reasons, it is conventionally necessary to improve the method of casting a precision cast golf club head by gravity.

The "step retention rate" described below in the present invention is defined as: the total weight of the cast finished product / the total weight of the cast finished product and the foundry scrap x 100%; that is, the higher the step retention rate, the proportion of the cast finished product in the cast product The higher the relative reduction in foundry waste, thereby increasing the effective use of the cast material, and helping to reduce the cost of casting.

The "weight loss rate" described below in the present invention is defined as: (total weight of the cast material - total weight of the cast) / total weight of the cast material x 100%; that is, the lower the weight loss rate, the cast material is converted into cast The higher the proportion of the material, the relatively reduced amount of loss of the cast material in the casting process, thereby increasing the effective use rate of the cast material, and helping to reduce the casting cost.

The object of the present invention is to provide a method for manufacturing a stainless steel golf club head. It can greatly improve the retention rate of the casting and reduce the weight loss rate of the casting material to reduce the casting cost.

A second object of the present invention is to provide a method for manufacturing a stainless steel golf club head which can reduce the chemical reaction of the cast material with the atmosphere during the smelting process to improve the yield and quality of the cast.

Still another object of the present invention is to provide a method of manufacturing a stainless steel golf club head that simplifies the compounding step of the casting material to improve handling convenience and to avoid splashing of the molten casting material.

Still another object of the present invention is to provide a method for manufacturing a stainless steel golf club head, which can eliminate steps such as slagging, degassing and pressing, to simplify the process and reduce the casting cost.

In order to achieve the foregoing objective, the technical content of the present invention includes: a method for manufacturing a stainless steel golf club head, comprising: positioning a shell mold on a rotating platform, the shell mold comprising a connecting portion and a connecting portion a cavity portion, wherein the rotating platform is coupled to an axially rotatable rotating shaft; at least one metal ingot is placed on the crotch portion of the shell mold, and the ingot is heated and melted into a stainless steel molten metal in a vacuum environment; The rotating shaft rotates in conjunction with the rotating platform to cause the molten stainless steel molten metal to flow into the cavity portion of the shell mold; the rotating shaft is slowly stopped, and the cast-completed shell mold is removed; and the shell mold is broken to obtain a casting. The casting has a weight loss rate of less than 5% compared to the ingot, the casting comprises a casting portion, the casting portion occupies 65-85% of the total weight of the casting; the casting portion is separated from the casting Obtaining at least one stainless steel golf club head; wherein the molding step of the shell mold comprises: preparing a wax embryo, the wax embryo comprising a embryo and a casting embryo, the first circumferential surface of the embryo is provided with a first Connection The casting embryo is provided with a second connecting portion, and the first connecting portion is integrally connected with the second connecting portion; a coating layer is formed on the surface of the wax embryo; and the wax embryo and the coating layer are heated to The wax is melted; the dewaxed cladding layer is sintered at a high temperature to form the shell mold, and the shell mold has integrally joined crotch portions and cavity portions.

Wherein, the number of the metal ingots may be a single one, the metal ingot is a stainless steel alloy, and the composition combination of the metal ingot is combined with the composition of the stainless steel golf club head to be made. Consistent.

Alternatively, the number of the metal ingots may be several, and the composition combination of the molten stainless steel metal liquids of the plurality of metal ingots is identical to the composition of the stainless steel golf club head to be produced.

The embryo of the wax embryo has a cylindrical shape, and the embryo has an upper end surface and a lower end surface. A circumferential surface is connected between the upper end surface and the lower end surface, and the circumferential width of the circumferential surface can be from the lower end. The upper end surface is gradually expanded so that the circumferential surface of the ring is inclined and forms a draft angle with the axial direction of the embryo, and the draft angle is 3 to 15 degrees.

Alternatively, the embryo of the wax embryo has a cylindrical shape, and the embryo has an upper end surface and a lower end surface, and a circumferential surface is connected between the upper end surface and the lower end surface, and the embryo may be additionally provided with a slope, the slope Connected between the lower end surface of the embryo and the first connecting portion, the inclined surface forms an oblique angle with the axial direction of the embryo, and the inclination angle is 3 to 15 degrees.

Wherein, the surface layer material of the shell mold may be zirconium silicate, cerium oxide, diazepam or alumina.

The back layer material of the shell mold may be a mullite mixture, the content of the aluminum oxide is 45% to 60%, and the content of the cerium oxide is 55% to 40%.

Alternatively, the backing layer material of the shell mold may be a cerium oxide mixture having a cerium oxide content of 95% or more.

Accordingly, the method for manufacturing the stainless steel golf club head of the present invention can greatly improve the retention rate of the casting, reduce the weight loss rate of the casting material, and reduce the chemical reaction of the casting material with the atmosphere during the smelting process, thereby improving The yield and quality of the casting; in addition, the invention can simplify the compounding step of the casting material, thereby improving the convenience of operation and avoiding splashing of the casting material, and eliminating steps such as slagging, degassing and pressing, to simplify the process and reduce the process. Casting costs.

1‧‧‧vacuum furnace

11‧‧ ‧ room

12‧‧‧ Airway tube

13‧‧‧ openings

14‧‧‧ Cover

2‧‧‧ shaft

21‧‧‧ body

22‧‧‧Turning

23‧‧‧Abutment

3‧‧‧Rotating platform

31‧‧‧Axis joint

311‧‧‧Perforation

32‧‧‧ Positioning Department

32a‧‧‧坩埚Location Department

32b‧‧‧Acupoint Positioning Department

321‧‧‧With holes

322‧‧‧ 容容

4‧‧‧Shell mold

41‧‧‧坩埚

411‧‧‧ accommodating space

412‧‧‧First connecting tube

413‧‧‧ ring lip

42‧‧‧Move

421‧‧‧ cavity

422‧‧‧Second connection tube

5‧‧‧heater

6‧‧‧Wax embryo

61, 61' ‧ ‧ embryo

61a, 61a’‧‧‧ upper end

61b, 61b’‧‧‧ lower end

61c, 61c’‧‧‧ circumferential surface

611‧‧‧First connection

612‧‧‧Slope

62‧‧‧ casting embryo

621‧‧‧Second connection

7‧‧‧Cladding

8‧‧‧ collar

M‧‧ motor

B‧‧‧ bearing

L‧‧‧ Lifting controller

P‧‧‧metal ingots

N‧‧‧Stainless steel liquid

A‧‧‧ axis

Θ‧‧‧ draft angle

‧‧‧‧Tilt angle

Fig. 1 is a schematic view showing the structure of a vacuum centrifugal casting apparatus used in conjunction with the present invention.

Fig. 2 is a partial perspective exploded view of the vacuum centrifugal casting apparatus used in conjunction with the present invention.

Figure 3: Schematic diagram (I) of the implementation of the present invention.

Fig. 4 is a schematic view showing the molding process of the shell mold of the vacuum centrifugal casting apparatus used in the present invention.

Fig. 5 is a perspective view showing an embryo of the invention for forming a shell mold.

Fig. 6 is a side cross-sectional view showing the embryo of Fig. 5.

Figure 7 is a perspective view of another embryo of the present invention for forming a shell mold.

Fig. 8 is a side cross-sectional view showing the embryo of Fig. 7.

Figure 9: Schematic diagram of the implementation of the present invention (2).

Figure 10: Schematic diagram (3) of the implementation of the present invention.

Figure 11 is a schematic view showing the structure of another vacuum centrifugal casting apparatus used in conjunction with the present invention.

The above and other objects, features and advantages of the present invention will become more <RTIgt;

Please refer to Fig. 1, which is a vacuum centrifugal casting apparatus used in the method for manufacturing a stainless steel golf club head according to the present invention. Wherein, the vacuum centrifugal casting device comprises a vacuum furnace 1, a rotating shaft 2, a rotating platform 3, a shell mold 4 and a heater 5; the rotating shaft 2, the rotating platform 3, the shell mold 4 and the heater 5 are all disposed at In the vacuum furnace 1, the rotating platform 3 is coupled to the rotating shaft 2 for synchronous rotation with the rotating shaft 2. The shell mold 4 is positioned and placed on the rotating platform 3, and the heater 5 is used to heat the shell mold 4.

More specifically, the inside of the vacuum furnace 1 has a chamber 11 , and the vacuum furnace 1 can be provided with an air duct 12 , the air tube 12 is connected to the chamber 11 , and a vacuum controller (not shown) The chamber 11 can be evacuated through the air duct 12 according to a set value to control the The degree of vacuum of the chamber 11. In addition, the vacuum furnace 1 may further be provided with an opening 13 for the user to insert or remove the article into the chamber 11, and a cover 14 is provided to open and close the opening 13.

Referring to Figures 1 and 2, the shaft 2 is axially rotatably disposed in the chamber 11 of the vacuum furnace 1; in the present embodiment, the shaft 2 is connectable to the output of a motor M. The motor M drives the rotation. Moreover, the motor M can be selectively disposed outside the vacuum furnace 1, and one end of the rotating shaft 2 extends out of the vacuum furnace 1 to connect the motor M; the rotating shaft 2 can be placed in a bearing B, and the bearing B can be The connection is positioned in the vacuum furnace 1 to assist in improving the rotational stability of the rotating shaft 2, and preventing the yaw from occurring when the rotating shaft 2 rotates.

In addition, the portion of the rotating shaft 2 located in the chamber 11 can be divided into a body 21 and a rotation preventing portion 22, and the radial cross-sectional shape of the body 21 and the rotation preventing portion 22 are different to form an offset at the boundary between the two. a portion 23 for the rotating platform 3 to be coupled to the abutting portion 22 and abutting against the abutting portion 23, so that the rotating platform 3 can rotate synchronously with the rotating shaft 2; in the embodiment, the body 21 The radial section may be in the form of a circle. The rotation stop 22 may be disposed at the end of the rotating shaft 2, and the radial section of the rotation stop 22 is in a non-circular shape for the sleeve 3 to be coupled. The rotation stop portion 22 abuts against the abutment portion 23.

Referring to FIGS. 2 and 3, the rotating platform 3 is a carrier for positioning the shell mold 4, and the rotating platform 3 is provided with a connecting portion 31 and a positioning portion 32; in this embodiment, The shaft portion 31 can be provided with a through hole 311. The radial cross-sectional shape of the through hole 311 is matched with the radial cross-sectional shape of the rotation preventing portion 22 of the rotating shaft 2 for the rotating platform 3 to pass through the shaft portion. The through hole 311 of the sleeve 31 is connected to the rotation preventing portion 22 of the rotating shaft 2. The positioning portion 32 of the rotating platform 3 can be roughly divided into a positioning portion 32a and a cavity positioning portion 32b. The positioning portion 32a is located between the shaft portion 31 and the cavity positioning portion 32b, and the shaft is connected. The portion 31, the positioning portion 32a and the cavity positioning portion 32b are arranged according to the radial extension of the rotating shaft 2; further, the positioning portion 32a can be provided with a through hole 321 for a part of the shell mold 4 to extend through The cavity positioning portion 32b can be provided with a cavity 322 for accommodating another part of the shell mold 4.

Referring to FIGS. 2 and 3, the shell mold 4 has a crotch portion 41 and a cavity portion 42. The crotch portion 41 of the shell mold 4 can be positioned and placed on the crucible positioning portion 32a of the rotating platform 3. The cavity portion 42 of the shell mold 4 is then positionable on the cavity positioning portion 32b of the rotary table 3 such that the crotch portion 41 of the shell mold 4 is closer to the shaft portion 31 of the rotary table 3 than the cavity portion 42. .

The sill portion 41 can be formed in a cup shape to form an accommodating space 411 therein. The accommodating space 411 can be used to receive a molten metal ingot, and the ring portion 41 has a first circumferential surface. The connecting tube 412 is connected to the accommodating space 411. The cavity portion 42 is a portion for molding a golf club head. The shape of the cavity portion 42 is not particularly limited, and the inside of the cavity portion 42 has at least one cavity 421, and the shape and shape of the cavity 421 The golf club head to be cast is matched; the cavity portion 42 is further provided with a second connecting pipe 422, the second connecting pipe 422 is connected to the cavity 421, and the crotch portion 41 and the cavity portion 42 are A connecting tube 412 and a second connecting tube 422 are opposite to each other, so that the accommodating space 411 is in communication with the cavity 421.

Referring to FIG. 4, in the embodiment, the crotch portion 41 of the shell mold 4 and the cavity portion 42 may be integrally connected. The molding process of the shell mold 4 is: preparing a wax embryo 6, the wax embryo 6 includes an embryo 61 and a casting embryo 62. The circumferential surface of the embryo 61 is provided with a first connecting portion 611, and the casting embryo 62 is provided with a second connecting portion 621, the embryo 61 and the casting The embryo 62 is integrally connected to each other by the first connecting portion 611 and the second connecting portion 621. The wax blank 6 is subjected to a process such as dipping, sanding or grit, and a coating layer 7 is formed on the surface of the wax blank 6. The wax embryo 6 and the coating layer 7 are heated to melt the wax; for example, the wax embryo 6 and the coating layer 7 may be placed together in a steam autoclave to melt the wax embryo 6 to The coating layer 7 is discharged. The dewaxed cladding layer 7 is sintered at a high temperature to form the shell mold 4, and the shell mold 4 has an integrally joined crotch portion 41 and a cavity portion 42. Wherein, the surface layer material of the shell mold 4 may be selected from refractory materials such as zirconium silicate, cerium oxide, diazepam or alumina, and the back layer material of the shell mold 4 may be selected from mullite (3Al ₂ O ₃ -2SiO). ₂ ) or cerium oxide as a refractory material; further, when the back layer material is a mixture of mullite, the content of the aluminum oxide is preferably 45% to 60%, and the content of cerium oxide is preferably 55%. 40%; when the back layer material is a mixture of cerium oxide, the content of cerium oxide is preferably more than 95%.

Further, in order to improve the smoothness of the molten metal flowing from the crotch portion 41 of the shell mold 4 into the cavity portion 42 during use, the crotch portion 41 of the shell mold 4 preferably has an inclined circumferential wall which gradually expands the inner diameter from the bottom portion. Therefore, the embryo 61 of the wax embryo 6 needs to have a corresponding appearance. For example, referring to FIGS. 5 and 6, in the embodiment, the embryo 61 of the wax embryo 6 can be substantially cylindrical, and the embryo 61 has an opposite upper end surface 61a and a lower end surface 61b. A circumferential surface 61c is formed between the end surface 61a and the lower end surface 61b. The diameter of the circumferential surface 61c is gradually expanded from the lower end surface 61b toward the upper end surface 61a, so that the circumferential surface 61c of the embryo 61 is inclined and The axis A of the embryo 61 forms a draft angle θ, and the draft angle θ can be about 3 to 15 degrees. Alternatively, please refer to FIGS. 7 and 8. In another embodiment, the embryo 61' of the wax embryo 6' may be substantially cylindrical, and the embryo 61' is provided with a slope 612, and the slope 612 is connected to the crucible. Between the lower end surface 61b' of the embryo 61' and the first connecting portion 611, the inclined surface 612 forms an oblique angle α with the axis A of the embryo 61', and the inclination angle α can be about 3 to 15 degrees.

Referring to FIGS. 1 and 3 again, the heater 5 is disposed in the chamber 11 of the vacuum furnace 1 for heating the crotch portion 41 of the shell mold 4. In this embodiment, the heater 5 can be selected as a high-frequency coil, and the heater 5 is moved by the lift controller L in the chamber 11; when the crotch portion 41 of the shell mold 4 is to be heated, The heater 5 can be driven up to a predetermined position to surround the outer circumference of the crotch portion 41, and the heater 5 is activated to heat the crotch portion 41. After the heating is completed, the heater 5 can be heated. The lift controller L is driven to descend so that the heater 5 no longer surrounds the outer circumference of the jaw portion 41 so as not to interfere with the rotation of the shell mold 4 with the rotating platform 3 and the rotating shaft 2.

According to the foregoing structure, the present invention can implement a method of manufacturing a stainless steel golf club head, which generally includes the following steps:

Referring to Figures 1 to 3, a shell mold 4 is positioned and placed on a rotating platform 3, and the rotating platform 3 is coupled to an axially rotatable shaft 2. More specifically, the rotating platform 3 can be disposed in a vacuum furnace 1 to control the degree of vacuum of the space in which the shell mold 4 is located. In addition, the shell mold 4 includes a connecting portion 41 and a cavity portion. The shell mold 4 can be inserted into the through hole 321 of the rotating platform 3 by the dam portion 41, and the first connecting tube 412 of the dam portion 41 abuts against the rotating platform 3, and the shell mold 4 The cavity portion 42 can be placed on the cavity 322 of the rotating platform 3, so that the shell mold 4 can be stably fixed at a preset position on the rotating platform 3. And, at least one metal ingot P is placed in the crotch portion 41 of the shell mold 4; when the number of the metal ingots P is selected to be a single one, the metal ingot P is a stainless steel alloy, and the composition of the ingot P is It is consistent with the composition of the components of the stainless steel golf club head to be made; when the number of the metal ingots P is several, the composition of the stainless steel molten metal after melting of the plurality of metal ingots P and the desired stainless steel golf ball The composition of the club head is consistent.

Referring to Figures 1 and 9, the ingot P is heated and melted into a stainless steel molten metal N in a vacuum environment. More specifically, after the housing mold 4 is positioned, the heater 5 can be driven up to a predetermined position to surround the outer circumference of the jaw portion 41; meanwhile, the air duct 12 of the vacuum furnace 1 can be directed The chamber 11 is evacuated to control the degree of vacuum of the chamber 11. After the vacuum degree reaches a preset value (for example, the degree of vacuum is less than 0.3 mbar), the heater 5 can be activated to heat the crotch portion 41 of the shell mold 4 to melt the metal ingot P in the crotch portion 41. The stainless steel molten metal N; wherein, when the heater 5 is actuated, the frequency of the power supply can be, for example, 4 kHz to 30 kHz, and the power is 5 kW to 100 kW. After the metal ingot P is melted into the stainless steel molten metal N, the heater 5 stops operating and is rapidly driven down so that the heater 5 no longer surrounds the outer circumference of the crotch portion 41.

Referring to FIGS. 1 and 10, the rotating shaft 2 is driven to rotate the rotating platform 3 to cause the molten stainless steel molten metal N to flow into the cavity portion 42 of the shell mold 4. More specifically, the shaft 2 can be driven by the motor M to generate an axial rotation at a speed of about 200 rpm to 700 rpm. The rotation speed can be adjusted according to the thickness of the casting (that is, the space of the cavity 421); when the rotating platform 3 is interlocked and rotates with the rotating shaft 2 as an axis, the stainless steel molten metal N can be subjected to centrifugal force during the rotating process. Acting along the inner wall surface of the crotch portion 41 of the shell mold 4, through the first connecting tube 412 and the second connecting tube 422 of the shell mold 4, flowing into the cavity portion 42 to perform a casting operation, thereby filling the Cavity 421. After the casting is completed, the rotating shaft 2 can be stopped slowly, and the shell mold 4 is removed from the rotating platform 3, and the shell mold 4 is continuously broken to obtain a casting, which is compared with the metal ingot P. The weight loss rate is less than 5%, that is, the stainless steel metal liquid N which is melted by the metal ingot P, and the casting material is damaged due to factors such as overflow, splashing or remaining in the crotch portion 41 of the shell mold 4 during the process. The casting rate includes a casting portion, and the casting portion accounts for 65-85% of the total weight of the casting; finally, the casting portion is separated from the casting (for example, cutting with a cutter, or The vibration is broken to separate it to obtain at least one stainless steel golf club head belonging to the finished product.

Therefore, in the method for manufacturing the stainless steel golf club head of the present invention, the stainless steel molten metal N can be surely poured into the cavity 421 of the shell mold 4 by centrifugal force before the molten stainless steel molten metal N is solidified again to avoid occurrence. Part of the stainless steel molten metal N solidifies to form a crust in the crotch portion 41, and also improves the situation in which the conventional manufacturing method is prone to overflow or splash of stainless steel metal liquid during casting, so that the cast material can be effectively improved (ie, the metal ingot) P) Converting to the proportion of the casting, so that most of the casting materials can be effectively used, relatively reducing the unnecessary loss of casting materials, so that the weight loss rate of the casting material can be controlled below 5%, avoiding waste of casting materials To reduce the cost of casting. In addition, compared with the conventionally cast casting by gravity casting, the casting made by vacuum centrifugal casting of the present invention not only reduces the number of the pouring cup portion, but also can greatly reduce the volume of the flow path portion and make the casting waste. The proportion is greatly reduced, and the ratio of the finished product (ie, the casting part) relative to the total weight of the cast product and the foundry waste (ie the total weight of the casting) is relatively increased, so that the casting retention rate can be increased to 65-85. % can reduce casting costs by reducing foundry scrap and increasing the effective use of cast materials.

In addition, referring to FIG. 11 , in another embodiment, the manufacturing method of the stainless steel golf club head of the present invention can also be combined with the shell mold 4 having a plurality of cavity 421 to cast a plurality of stainless steel golf balls at one time. The head is used to increase manufacturing efficiency.

In summary, the method for manufacturing the stainless steel golf club head of the present invention can greatly improve the retention rate of the casting and reduce the weight loss rate of the casting material to reduce the casting cost.

The manufacturing method of the stainless steel golf club head of the invention can melt the stainless steel metal liquid in a vacuum environment, reduce the chemical reaction of the casting material with the atmosphere during the smelting process, avoid the oxidation reaction of the stainless steel metal liquid, and improve the yield and quality of the casting. .

In the method for manufacturing the stainless steel golf club head of the present invention, the metal ingot which is combined with the composition of the stainless steel golf club head to be produced can be directly placed in the shell mold, and then the metal ingot is heated to be melted, thereby simplifying the casting material. The batching step improves the convenience of operation, and the metal ingot does not cause splashing during the melting process, thereby causing loss of the casting material.

The manufacturing method of the stainless steel golf club head of the invention can eliminate the steps of slag making, degassing and pressing soup, can not only simplify the process to improve the casting efficiency, but also can avoid the loss of the casting material caused by the slagging step, and save the degassing step. The cost of materials caused by the deoxidizer and the soup material, as well as the energy cost of the additional consumption of the slagging step and the pressure reduction, thereby reducing the overall casting cost.

While the invention has been described in connection with the preferred embodiments described above, it is not intended to limit the scope of the invention. The technical scope of the invention is protected, and therefore the scope of the invention is defined by the scope of the appended claims.

2‧‧‧ shaft

21‧‧‧ body

22‧‧‧Turning

23‧‧‧Abutment

31‧‧‧Axis joint

311‧‧‧Perforation

32‧‧‧ Positioning Department

32a‧‧‧坩埚Location Department

32b‧‧‧Acupoint Positioning Department

321‧‧‧With holes

322‧‧‧ 容容

4‧‧‧Shell mold

41‧‧‧坩埚

411‧‧‧ accommodating space

412‧‧‧First connecting tube

42‧‧‧Move

421‧‧‧ cavity

422‧‧‧Second connection tube

5‧‧‧heater

N‧‧‧metal liquid

Claims (8)

A method for manufacturing a stainless steel golf club head, comprising: positioning a shell mold on a rotating platform, the shell mold comprising a connecting portion and a cavity portion, wherein the rotating platform is coupled to an axially rotatable portion a rotating shaft; at least one metal ingot is placed on the crotch portion of the shell mold, and the ingot is heated and melted into a stainless steel metal liquid in a vacuum environment; the rotating shaft is driven to rotate the rotating platform to cause the molten stainless steel metal to flow into the shaft In the cavity portion of the shell mold; stopping the rotating shaft at a slow speed, and removing the cast shell mold; destroying the shell mold to obtain a casting having a weight loss rate of less than 5 compared to the metal ingot %, the casting comprises a casting portion, the casting portion occupies 65-85% of the total weight of the casting; the casting portion is separated from the casting to obtain at least one stainless steel golf club head; wherein the casting The molding step of the mold comprises: preparing a wax embryo, the wax embryo comprising a embryo and a casting embryo, wherein the circumferential surface of the embryo is provided with a first connecting portion, and the casting embryo is provided with a second connecting portion, First connection part and the first The connecting portion is integrally connected to each other; a coating layer is formed on the surface of the wax embryo; the wax embryo and the coating layer are heated to melt the wax; and the dewaxed coating layer is sintered at a high temperature to form the coating layer. The shell mold has the shell mold having an integral crotch portion and a cavity portion. The method for manufacturing a stainless steel golf club head according to claim 1, wherein the number of the metal ingots is a single one, the metal ingot is a stainless steel alloy, and the composition of the metal ingot is combined with the desired one. Stainless steel golf club heads have the same composition. The method for manufacturing a stainless steel golf club head according to claim 1, wherein the number of the metal ingots is several, the composition of the stainless steel molten metal after melting the plurality of metal ingots, and the desired stainless steel. The composition of the golf club head is consistent. The method for manufacturing a stainless steel golf club head according to any one of claims 1 to 3, wherein the embryo of the wax embryo has a cylindrical shape, and the embryo has an upper end surface and a lower end surface. A circumferential surface is connected between the upper end surface and the lower end surface, and a diameter of the circumferential surface of the circumferential surface is gradually enlarged from the lower end surface toward the upper end surface, so that the circumferential surface of the ring is inclined and forms a draft with the axial direction of the ram. Angle, the draft angle is 3 to 15 degrees. The method for manufacturing a stainless steel golf club head according to any one of claims 1 to 3, wherein the embryo of the wax embryo has a cylindrical shape, and the embryo has an upper end surface and a lower end surface. A circumferential surface is connected between the upper end surface and the lower end surface, and the embryo is further provided with a slope surface connected between the lower end surface of the embryo and the first connecting portion, the inclined surface and the axial direction of the embryo A tilt angle is formed, which is 3 to 15 degrees. The method for producing a stainless steel golf club head according to any one of claims 1 to 3, wherein the surface layer material of the shell mold is zirconium silicate, cerium oxide, diazepam or alumina. The method for manufacturing a stainless steel golf club head according to any one of claims 1 to 3, wherein the back layer material of the shell mold is a mullite mixture, and the content of the aluminum oxide is 45%. ~60%, the content of cerium oxide is 55%~40%. The method for manufacturing a stainless steel golf club head according to any one of claims 1 to 3, wherein the back layer material of the shell mold is a cerium oxide mixture, and the content of cerium oxide is 95% or more. .