阅读说明：本技术 高尔夫球杆头铸造法 (Casting method for golf club head ) 是由 吴思颖 李壬富 陈泰富 于 2018-08-31 设计创作，主要内容包括：一种高尔夫球杆头铸造法,包括：成型一个壳模,壳模包括一个主浇道,该主浇道连接至少一个成型单元,成型单元具有连接该主浇道的一个连接流道,连接流道通过一个杆头入浇道连接一个杆头模穴,杆头模穴具有一个杆面成型部,杆面成型部的并行线与连接流道的一个轴线形成一个夹角,夹角为35°～80°,杆头模穴连接一个杆头排气道的一个入气端,入气端与连接流道的轴线具有一个最大垂直距离,且杆头排气道的一个排气端朝主浇道的方向延伸,并超出杆头模穴的范围；驱动壳模以主浇道为中心,以400～600rpm的转速离心1～15秒以进行熔融金属原料的充填；及以5～10秒内降速至200～300rpm的转速进行离心30～180秒以使熔融金属原料凝固。(A method of casting a golf club head comprising: forming a shell mold, wherein the shell mold comprises a main pouring gate which is connected with at least one forming unit, the forming unit is provided with a connecting flow channel connected with the main pouring gate, the connecting flow channel is connected with a head mold cavity through a head pouring gate, the head mold cavity is provided with a face forming part, a parallel line of the face forming part and an axis of the connecting flow channel form an included angle of 35-80 degrees, the head mold cavity is connected with an air inlet end of a head exhaust passage, the air inlet end and the axis of the connecting flow channel have a maximum vertical distance, and an exhaust end of the head exhaust passage extends towards the direction of the main pouring gate and exceeds the range of the head mold cavity; driving the shell mold to centrifuge at a rotation speed of 400-600 rpm for 1-15 seconds by taking the main pouring gate as a center so as to fill the molten metal raw material; and centrifuging the molten metal material for 30 to 180 seconds at a rotation speed reduced to 200 to 300rpm within 5 to 10 seconds to solidify the molten metal material.)

1. A method of casting a golf club head, comprising:

forming a shell mold, wherein the shell mold comprises a main pouring gate which is connected with at least one forming unit, the forming unit is provided with a connecting flow channel connected with the main pouring gate, the connecting flow channel is connected with a head mold cavity through a head pouring gate, the head mold cavity is provided with a face forming part, a parallel line of the face forming part and an axis of the connecting flow channel form an included angle, the included angle is 35-80 degrees, the head mold cavity is connected with an air inlet end of a head exhaust passage, the air inlet end and the axis of the connecting flow channel have a maximum vertical distance, and an exhaust end of the head exhaust passage extends towards the direction of the main pouring gate and exceeds the head mold cavity;

driving the shell mold to centrifuge at a rotation speed of 400-600 rpm for 1-15 seconds around the main runner for filling the molten metal material; and

the speed is reduced to 200-300 rpm and the molten metal material is centrifuged for 30-180 seconds to solidify the molten metal material.

2. The method of claim 1, wherein a slurry of stabilized zirconia powder and silica gel or zirconium ammonium carbonate gel is formed into a coating layer with a thickness of 6-9 mm on a surface of a wax pattern, and the wax pattern with the coating layer is dewaxed and sintered to form the shell mold.

3. The method of casting a golf club head according to claim 1, wherein the filling of the molten metal material is performed centrifugally after preheating the shell mold by heating at 1200 to 1370 ℃ for 90 to 150 minutes.

4. The method of casting a golf club head according to claim 1 wherein the main runner has a datum axis, the main runner having axially opposite an injection end and a connecting end, one end of the connecting runner connecting to the connecting end to communicate with the main runner, the opposite end of the connecting runner having a sprue trap.

5. The method of casting a golf club head according to claim 4, wherein the axis of the connecting runner passes through opposite ends, the axis is perpendicular to the reference axis of the main runner, the connecting runner has a maximum width in a radial section in the axial direction, the width of the slag trap portion in the circumferential direction with respect to the reference axis is 1.5 to 2.5 times the maximum width, and the thickness of the slag trap portion in the reference axis direction of the main runner is 3 to 10 mm.

6. The method of casting a golf club head according to claim 1, wherein the head sprue is disposed adjacent the face form.

7. The method of casting a golf club head according to claim 1 wherein the vent end is connected to the main runner.

8. The method of casting a golf club head according to any of claims 1 to 7 wherein the molding unit further comprises an auxiliary runner having a first end connected to the head sprue and a second end connected to the head cavity, the auxiliary runner being located at the position of the head cavity opposite the main runner and facing the main runner.

9. The method of casting a golf club head according to claim 1, wherein the molten metal material is formed by melting the desired metal at 1650 to 1750 ℃ and is injected into the shell mold within 0.5 to 3 seconds.

10. The method of casting a golf club head according to claim 1, wherein the molten metal material is charged by centrifugation at a centrifugal force of 120 to 400N for 1 to 15 seconds, and solidified by centrifugation at a centrifugal force of 40 to 90N for 30 to 180 seconds.

Technical Field

The present invention relates to a method for casting a golf club head, and more particularly, to a method for manufacturing a golf club head by an atmospheric centrifugal casting method.

Background

In the existing casting method of the golf club head, a plurality of wax molds corresponding to the shape of the club head body are usually arranged on a base to form a wax module tree, the wax module tree is soaked in slurry and dewaxed to form a shell mold, the shell mold is filled with molten metal in a gravity casting machine, and the molten metal is taken out after being cooled and solidified to obtain the required club head body. However, the conventional casting method is still required to be improved because the ball head molding rate is not good and the production cost is likely to increase.

Disclosure of Invention

In order to solve the above problems, an object of the present invention is to provide a method for casting a golf club head, which can contribute to mass production of a golf club head.

The casting method of the golf club head of the present invention comprises: forming a shell mold, wherein the shell mold comprises a main pouring gate which is connected with at least one forming unit, the forming unit is provided with a connecting flow channel connected with the main pouring gate, the connecting flow channel is connected with a head mold cavity through a head pouring gate, the head mold cavity is provided with a face forming part, a parallel line of the face forming part and an axis of the connecting flow channel form an included angle, the included angle is 35-80 degrees, the head mold cavity is connected with an air inlet end of a head exhaust passage, the air inlet end and the axis of the connecting flow channel have a maximum vertical distance, and an exhaust end of the head exhaust passage extends towards the direction of the main pouring gate and exceeds the head mold cavity; driving the shell mold to centrifuge at a rotation speed of 400-600 rpm for 1-15 seconds around the main runner for filling the molten metal material; and reducing the speed to 200-300 rpm, and centrifuging for 30-180 seconds to solidify the molten metal raw material.

Accordingly, the casting method of the golf club head of the invention can fully fill the shell mold with the molten metal raw material through the shell mold formed by the atmosphere centrifugal casting method, avoid the condition of incomplete gas discharge, ensure the integrity of the obtained golf club head casting and achieve the technical effect of improving the forming rate of the golf club head; and through the stage centrifugation of the atmosphere centrifugal casting method, the damage of the shell mold and the incomplete solidification of the molten metal raw material can be avoided, the qualification rate of the casting can be effectively improved, the waste of casting materials is reduced, and the technical effect of avoiding the cost increase is achieved.

Wherein, slurry formed by stable zirconia powder and silicic acid glue or ammonium carbonate zirconium glue forms a coating layer with the thickness of 6-9 mm on the surface of a wax mould, and the wax mould with the coating layer is dewaxed and sintered to form the shell mould. Therefore, the shell mold can have good integrity, and the forming rate of the golf club head casting is further improved.

Wherein the shell mold is preheated by heating at 1200-1370 ℃ for 90-150 minutes and then filled with the molten metal material by centrifugation. Therefore, the shell mold can have good integrity, and the forming rate of the golf club head casting is further improved.

The main pouring channel is provided with a reference shaft, the main pouring channel is provided with an opposite injection end and a connecting end in the axial direction, one end of the connecting flow channel is connected with the connecting end so as to be communicated with the main pouring channel, and the other end, opposite to the connecting flow channel, of the connecting flow channel is provided with a slag collecting part. Thus, the impurities in the molten metal raw material can be concentrated in the slag collecting portion by the centrifugal force, and the impurities do not fill the other region of the shell mold with the molten metal raw material.

The axial line of the connecting flow channel passes through two opposite ends, the axial line is perpendicular to the reference shaft of the main pouring channel, the radial section of the connecting flow channel in the axial direction has a maximum width, the width of the slag collecting part in the circumferential direction relative to the reference shaft is 1.5-2.5 times of the maximum width, and the thickness of the slag collecting part in the reference shaft direction of the main pouring channel is 3-10 mm. Thus, there is an effect of providing a sufficient collecting space to concentrate the foreign substances.

Wherein, the rod head pouring channel is arranged near the rod surface forming part. Thus, the face molding part can be regarded as a runner, and the effect of assisting the molding of the golf club head casting is obtained.

Wherein the exhaust end is connected to the main runner. Thus, the molten metal material flowing into the exhaust passage of the rod head can be poured back into the main pouring gate, and the integral structural strength of the molding unit can be further enhanced.

The molding unit further comprises an auxiliary pouring channel, the auxiliary pouring channel is provided with a first end connected with the head pouring channel and a second end connected with the head die cavity, and the auxiliary pouring channel is located at the position of the head die cavity opposite to the main pouring channel and faces the main pouring channel. Therefore, the golf club head cavity can be completely filled, and the forming rate of the golf club head can be increased.

Wherein, the required metal is melted at 1650-1750 ℃ to form the molten metal raw material, and the molten metal raw material is injected into the shell mold within 0.5-3 seconds. This has the effect of ensuring the fluidity of the molten metal material.

Wherein the molten metal material is charged by centrifugation at a centrifugal force of 120 to 400N for 1 to 15 seconds, and the molten metal material is solidified by centrifugation at a centrifugal force of 40 to 90N for 30 to 180 seconds.

Drawings

FIG. 1 is a tree diagram of a shell module according to a preferred embodiment of the present invention.

FIG. 2 is a perspective view of a forming unit of a shell mold according to a preferred embodiment of the present invention.

Description of the reference numerals

(present invention)

1 Main pouring channel

11 injection end 12 connection end

2 Forming Unit

21 connecting flow passage 211 slag collecting part

Pouring channel for 22 rod head and mould cavity for 23 rod head

231 face forming part 24 head exhaust passage

241 gas inlet end 242 gas outlet end

25 auxiliary runner 251 first end

252 second end

X axis of T reference shaft

H maximum vertical distance F parallel lines.

Detailed Description

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below:

the following directional terms or their similar terms, such as "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "side", etc., refer to the directions of the drawings, and are used only for the purpose of describing and understanding the embodiments of the present invention, and are not intended to limit the present invention.

The casting method of a golf club head according to an embodiment of the present invention includes: forming a shell mold, and driving the shell mold to rotate for filling the shell mold with molten metal material, thereby obtaining a golf club head casting.

The shell mold can form a coating layer on the surface of the wax mold through slurry dipping, sand spraying or sand pasting and other processes, and the wax mold with the coating layer is formed after dewaxing and sintering, and the shape of the wax mold can be provided with a part for forming the golf club head casting and a part required by casting for forming the shell mold filled with the molten metal raw material, which can be understood by persons in the art, and the description of the invention is omitted here. In this embodiment, the slurry is formed by stabilizing zirconia powder and silicate glue or ammonium zirconium carbonate glue, the coating layer is formed with a thickness of 6-9 mm, the wax mold and the coating layer are heated together, so that the wax mold is melted and discharged from the coating layer to complete dewaxing, thereby providing a good integrity of the shell mold and further improving the molding rate of the golf club head casting.

Referring to fig. 1 and 2, in detail, the shell mold includes a main runner 1, the main runner 1 is connected to at least one forming unit 2, the main runner 1 may have a reference axis T, so that the shell mold can rotate around the reference axis T, the molten metal material may be poured through the main runner 1 and filled into the forming unit 2 by centrifugal force, and when there are a plurality of forming units 2, the forming units may be evenly disposed around the main runner 1 to form a shell module tree, thereby providing an overall balance degree when the shell mold is centrifuged. The main runner 1 has an injection end 11 and a connecting end 12 opposite to each other in the axial direction, and the molten metal raw material can be poured through the injection end 11 and flow to the connecting end 12.

The forming unit 2 is connected to the connecting end 12 of the main runner 1, so that the molten metal material injected into the main runner 1 can continuously flow into the forming unit 2 through the centrifugal force of the rotation of the shell mold after flowing into the connecting end 12, in detail, the forming unit 2 has a connecting runner 21, one end of the connecting runner 21 is connected to the connecting end 12 of the main runner 1 so as to be communicated with the main runner 1, and the other end of the connecting runner 21 opposite to the connecting runner can have a slag collecting portion 211, whereby impurities in the molten metal material can be concentrated on the slag collecting portion 211 through the centrifugal force without filling other areas of the shell mold with the molten metal material, for example, a rod head 23 can be connected to the connecting runner 22 between the two ends of the connecting runner 21 of the forming unit 2, so that the impurities in the molten metal material have a heavy specific gravity when the shell mold is centrifuged, and will cross the stem head pouring channel 22 and be collected in the slag collecting portion 211, so as to prevent impurities from flowing into the stem head mold cavity 23 to affect the quality of the casting. In this embodiment, the connecting flow channel 21 may have an axis X passing through opposite ends, the axis X is perpendicular to the reference axis T of the main runner 1, a radial cross section of the connecting flow channel 21 in the direction of the axis X has a maximum width, a width of the slag collecting portion 211 in the circumferential direction with respect to the reference axis T may be 1.5 to 2.5 times the maximum width, and a thickness of the slag collecting portion 211 in the direction of the reference axis T of the main runner 1 may be 3 to 10mm, thereby providing a sufficient collecting space to collect impurities.

The club head cavity 23 has a space with a corresponding shape according to the club head to be shaped, the club head cavity 23 has a face forming part 231, the face forming part 231 is the position where the face of the golf club head is formed after the golf club head casting is shaped, in addition, the face of the golf club head is a relatively thick area of the club head, that is, the face forming part 231 is a relatively large part of the space in the club head cavity 23, therefore, in the embodiment, the club head sprue channel 22 can be arranged adjacent to the face forming part 231, accordingly, the face forming part 231 can be regarded as a channel for assisting the shaping of the golf club head casting. It should be noted that a parallel line F parallel to the rod face forming portion 231 may form an included angle θ with the axis X of the connecting flow channel 21, where the included angle θ is preferably 35 ° to 80 °, so as to avoid that the included angle θ is too small, so that the connection between the rod head pouring channel 22 and the connecting flow channel 21 is too sharp, which may easily cause the formation of impurities such as slag and sand during the filling process of the molten metal material, and avoid that the included angle θ is too large, the rod face forming portion 231 is too perpendicular to the connecting flow channel 21, which may cause the decrease of the effect as a pouring channel, and the whole mold cavity 23 may be closer to the main pouring channel 1, which may cause the decrease of centrifugal force and the filling capability.

The forming unit 2 further has a head vent 24, the head vent 24 is used for exhausting air in the head mold cavity 23, that is, as the molten metal material is filled into the head mold cavity 23, the air in the head mold cavity 23 can be pushed out, therefore, the head vent 24 is preferably far away from the head runner 22, in detail, the head vent 24 has an air inlet end 241 and an air outlet end 242, the air inlet end 241 is connected to the head mold cavity 23 and has a maximum vertical distance H with the axis X of the connecting runner 21, accordingly, when the molten metal material flows into the head mold cavity 23, the air in the head mold cavity 23 can be exhausted from the farthest position from the head vent 24, and the effect of ensuring complete air exhaust is achieved.

It should be noted that the exhaust end 242 of the exhaust passage 24 preferably extends toward the main runner 1 and beyond the range of the head mold cavity 23, so as to avoid the molten metal material flowing out from the exhaust end 242 of the exhaust passage 24 when the molten metal material has not completely filled in the head mold cavity 23 due to the communicating tube principle.

The head mold cavity 23 can be further connected to an auxiliary runner 25, the auxiliary runner 25 is located at a position where the head mold cavity 23 is aligned with the main runner 1, and the auxiliary runner 25 faces the main runner 1. in this embodiment, the auxiliary runner 25 has a first end 251 connected to the head sprue 22 and a second end 252 connected to the head mold cavity 23, and the molten metal material can further enter the auxiliary runner 25 after filling the head mold cavity 23, thereby ensuring that the head mold cavity 23 is completely filled. In addition, the molten metal material can enter the auxiliary runner 25 through the first end 251 of the head pouring channel 22 to assist the filling of the head cavity 23, thereby increasing the molding rate of the golf club head.

Moreover, when the molten metal material is filled into the club head cavity 23 from a position away from the main runner 1 toward the main runner 1 by the action of centrifugal force, the air in the club head cavity 23 may be gradually pushed toward the auxiliary runner 25 and exhausted, and particularly, when the molten metal material is filled to a position exceeding the air inlet end 241 of the club head exhaust passage 24, the exhaust efficiency of the club head exhaust passage 24 may be reduced, and the auxiliary runner 25 may help to exhaust the residual air in the club head cavity 23, so as to prevent the air from remaining in the club head cavity 23 and causing the air holes in the golf club head casting, thereby having the effect of improving the forming rate of the golf club head.

The shell mold is continuously driven to rotate about the reference axis T of the main runner 1, for example, by a centrifugal casting machine, thereby generating centrifugal force, and the molten metal raw material is injected through the main runner 1, and is filled in the shell mold by the centrifugal force. In detail, the molten metal material may be formed by melting the alloy used into molten metal, or by mixing different molten metal materials, in this embodiment, the shell mold may be preheated by heating at 1200-1370 degrees for 90-150 minutes, and the molten metal material may be formed by melting the required metal at 1650-1750 degrees, and the preheated shell mold may be injected within 0.5-3 seconds to ensure the fluidity of the molten metal material, so that the molten metal material may be filled in the shell mold by the centrifugal force generated after the shell mold rotates.

It is noted that the molten metal material can be centrifuged at a rotation speed of 400 to 600rpm for 1 to 15 seconds, the generated centrifugal force is 120 to 400N to provide sufficient centrifugal force for filling the molten metal material, the molten metal material is reliably filled into the club head cavity 23 of the shell mold, the shell mold is centrifuged at a rotation speed of 200 to 300rpm for 30 to 180 seconds within 5 to 10 seconds until the molten metal material is completely solidified, and the generated centrifugal force is 40 to 90N to prevent the shell mold from being broken by continuously receiving high temperature and pressure under the condition that the high-speed centrifugation is continuously maintained, so that the situation that the rotation speed of the molten metal material is too low in a state that the molten metal material is not completely solidified and formed, and the molten metal material flows backward in the gravity direction due to not being solidified, and the club head cannot be reliably formed is also prevented. After the molten metal raw material is completely solidified, the rotating speed is reduced to 0 within 10-20 seconds, and the shell mold is broken to obtain the golf club head casting.

In summary, the method for casting a golf club head according to the present invention forms the shell mold of the golf club head by an atmospheric centrifugal casting method, so as to fully fill the shell mold with the molten metal material, avoid the occurrence of incomplete gas discharge, ensure the integrity of the obtained golf club head casting, and achieve the technical effect of increasing the forming rate of the golf club head; and through the stage centrifugation of the atmosphere centrifugal casting method, the damage of the shell mold and the incomplete solidification of the molten metal raw material can be avoided, the qualification rate of the casting can be effectively improved, the waste of casting materials is reduced, and the technical effect of avoiding the cost increase is achieved.

Although the present invention has been disclosed with reference to the above preferred embodiments, it should be understood that the scope of the present invention is not limited thereto, and those skilled in the art will appreciate that various changes and modifications can be made to the above embodiments without departing from the spirit and scope of the present invention.