TWI881571B - Surface coating machine of golf balls - Google Patents

Abstract

A surface coating machine of golf balls includes an electrostatic precipitator station, a surface treatment station, a buffer station, and an electrostatic spraying station that are sequentially disposed along a golf ball conveying path. The electrostatic precipitator station is configured to perform a dust removal treatment on the golf balls. The surface treatment station is configured to electrify the surface of each of the golf balls. The buffer station is configured to volatilize a solvent present on the surface of each of the golf balls. The electrostatic spraying station is configured to apply an ion-charged coating material to each of the golf balls, such that the ion-charged coating material adheres to the surface of each of the golf balls by electrostatic adsorption so as to form a uniform coating layer.

Description

Golf ball surface coating machine

The present invention relates to a coating processing machine, in particular to a golf ball surface coating machine.

With the improvement of people's living standards and the emphasis on outdoor leisure life, more and more people have fallen in love with playing golf. These people may be men or women from all walks of life or all ages. In other words, golf allows people from different walks of life, different ages and different genders to compete and communicate on the same field, which is the charm of this sport.

In the production process of golf balls, surface coating is a very important step. The purpose is to form a layer of coating on the outer surface of the ball, which can provide protection and gloss and increase durability. The existing surface coating process mostly adopts air spraying, where a spray gun uses compressed air to generate airflow, atomizes the paint and sprays it onto the outer surface of the ball. However, in order to fully cover all surface areas with paint, air spraying operations are often required from different angles, which easily causes environmental pollution problems caused by paint particles flying everywhere. In addition, since the paint particles are delivered to the outer surface of the ball by air flow, the air spraying method also has problems such as low paint utilization rate and uneven coating thickness.

The technical problem to be solved by the present invention is to provide a golf ball surface coating machine in view of the shortcomings of the prior art, which embodies the concept of the present invention: first, the charged objects attached to the surface of the golf ball are electrostatically eliminated (electrostatic neutralization) and blown away, thereby achieving the effect of dust removal and ensuring the quality of the surface coating, and then charged coating is applied to the surface of the golf ball, wherein the coating particles can be attached to the surface of the golf ball by charge adsorption, and gradually accumulate a certain thickness to form a surface coating layer.

In order to solve the above technical problems, one of the technical solutions adopted by the present invention is to provide a golf ball surface coating machine, which includes a golf ball conveying path, an electrostatic dust removal station, a surface treatment station, a buffer station and an electrostatic spraying station. The golf ball conveying path is configured to convey a plurality of golf balls to a target location, and the golf ball conveying path includes a first conveying section, a second conveying section located after the first conveying section, a third conveying section located after the second conveying section, and a rotating section located after the third conveying section. The electrostatic dust removal station is disposed in the first conveying section and is provided with at least one electrostatic gun to perform electrostatic dust removal treatment on the golf balls conveyed to the first conveying section. The surface treatment station is arranged in the second conveying section and is provided with at least one conductive liquid spray gun to spray a conductive liquid to the golf ball conveyed to the second conveying section so that the surface of the golf ball is charged. The buffer station is arranged in the third conveying section and is provided with a volatilization chamber so that the golf ball conveyed to the third conveying section volatilizes the solvent in the conductive liquid in the volatilization chamber. The electrostatic spraying station is arranged in the rotating section and is provided with a disc-type nozzle to spray a charged coating to the golf ball conveyed to the rotating section, wherein the charged coating is attached to the surface of the golf ball by charge adsorption.

In an embodiment of the present invention, the electrostatic dust removal station defines a first horizontal reference plane, and the golf ball transported to the first transport section is located on the first horizontal reference plane. In addition, at least one of the electrostatic guns includes at least one upper electrostatic gun and at least one lower electrostatic gun that are symmetrically arranged with respect to the first horizontal reference plane.

In an embodiment of the present invention, at least one of the upper electrostatic guns is tilted downward by 20 to 30 degrees relative to the first horizontal reference plane, and at least one of the lower electrostatic guns is tilted upward by 20 to 30 degrees relative to the first horizontal reference plane, and at least one of the upper electrostatic guns and at least one of the lower electrostatic guns are arranged to have a relative distance of 8 to 16 centimeters from the golf ball transported to the first transport section.

In an embodiment of the present invention, the surface treatment station defines a second horizontal reference plane, and the golf ball transported to the second transport section is located on the second horizontal reference plane. In addition, at least one conductive liquid spray gun is disposed above the second horizontal reference plane.

In an embodiment of the present invention, at least one of the conductive liquid spray guns is tilted downward by 35 to 45 degrees relative to the second horizontal reference plane, and at least one of the conductive liquid spray guns is arranged to be 8 to 16 centimeters relative to the golf ball transported to the second transport section.

In an embodiment of the present invention, the volatility chamber is set to have a temperature of 23°C to 27°C and a relative humidity of 55% to 75%, and the residence time of the golf ball transported to the third transport section in the volatility chamber is 1 minute to 3 minutes.

In an embodiment of the present invention, in the surface treatment station, the conductive liquid sprayed by at least one conductive liquid spray gun covers the surface of the golf ball transported to the second transport section to form a conductive layer, and the conductive layer has a wet weight of 5 mg to 60 mg. In addition, in the buffer station, after the golf ball transported to the third transport section leaves the volatilization chamber, the conductive layer on its surface has a dry weight of 0 mg to 40 mg.

In an embodiment of the present invention, the electrostatic spray coating station defines a third horizontal reference plane, and there is a tilt angle between the disc-type spray head and the third horizontal reference plane, and the tilt angle is 5 degrees to 15 degrees.

In an embodiment of the present invention, the disc-type spray head is configured to spray the charged coating at a rotation speed of 100 rpm to 1000 rpm.

In an embodiment of the present invention, the golf ball surface coating machine also includes a conveying device, the conveying device includes a conveyor and a plurality of rotating holders, the conveyor defines the golf ball conveying path, and each of the rotating holders is configured to hold one of the golf balls and move on the conveyor.

In an embodiment of the present invention, the golf ball transport path includes a ball transport section located before the first transport section, and a plurality of guiding mechanisms are provided in the ball transport section to guide and position one or more golf balls on the corresponding rotating holder.

In general, the golf ball surface coating machine provided by the present invention is characterized by "an electrostatic dust removal station is arranged in the first conveying section to perform electrostatic dust removal treatment on the ball", "a surface treatment station is arranged in the second conveying section to treat the surface of the ball with a conductive liquid to make it charged", "a buffer station is arranged in the third conveying section to volatilize the solvent left on the surface of the ball" and "an electrostatic spray coating station is arranged in the return section to perform electrostatic dust removal treatment on the ball". The invention relates to a transfer section to apply a charged coating on the surface of the sphere, wherein the charged coating is attached to the surface of the sphere by charge adsorption. The required coating (such as topcoat coating) can be evenly coated on the surface of the sphere to form a coating layer with uniform coating and high quality. In the process, the coating particles can be reliably attached to the surface of the sphere, thereby reducing the flying pollution of the coating and improving the utilization rate of the coating.

Furthermore, the golf ball surface coating machine of the present invention can continuously process a large number of golf balls, and the entire process can be fully automated without the need for manual operation, which helps to realize the automated production of golf balls.

To further understand the features and technical contents of the present invention, please refer to the following detailed description and drawings of the present invention. However, the drawings provided are only used for reference and description and are not used to limit the present invention.

The following is a specific embodiment to illustrate the implementation of the "golf ball surface coating machine" disclosed in the present invention. Technical personnel in this field can understand the advantages and effects of the present invention from the content disclosed in this manual. The present invention can be implemented or applied through other different specific embodiments, and the details in this manual can also be modified and changed in various ways based on different viewpoints and applications without departing from the concept of the present invention. In addition, the drawings of the present invention are only for simple schematic illustrations and are not depicted according to actual sizes. Please note in advance. The following implementation will further explain the relevant technical content of the present invention in detail, but the disclosed content is not intended to limit the scope of protection of the present invention. In addition, the term "or" used herein may include any one or more combinations of the associated listed items as appropriate.

Unless otherwise defined, the terms used herein have the same meanings as those generally understood by those skilled in the art. Materials involved in each embodiment are commercially available or prepared according to prior art unless otherwise specified. Operations or instruments involved in each embodiment are conventional operations or instruments in the art unless otherwise specified.

[First embodiment]

Please refer to Figures 1 and 2. Figure 1 shows the structure of a golf ball surface coating machine 1 according to the present invention, and Figure 2 shows a finished golf ball 2 obtained after being processed by the golf ball surface coating machine 1. As shown in Figures 1 and 2, the first embodiment of the present invention provides a golf ball surface coating machine 1, which can evenly coat the required coating (such as topcoat coating) on the surface 210 of the ball 21 to form a coating layer 23 that is evenly coated and of high quality, wherein the coating particles can be reliably attached to the surface 210 of the ball 21, thereby reducing the flying pollution of the coating and improving the utilization rate of the coating. The golf ball surface coating machine 1 of the present invention mainly comprises a golf ball conveying path Z and an electrostatic dust removal station 11, a surface treatment station 12, a buffer station 13 and an electrostatic spray coating station 14 which are sequentially arranged on the golf ball conveying path Z.

In the present invention, the golf ball conveying path Z includes a first conveying section Z1, a second conveying section Z2 located after the first conveying section Z1, a third conveying section Z3 located after the second conveying section Z2, and a turnaround section Z4 located after the third conveying section Z3. The electrostatic dust removal station 11 is arranged in the first conveying section Z1 to perform electrostatic dust removal treatment on the ball 21 to remove dust or foreign matter attached to its surface 210 due to static electricity. The surface treatment station 12 is arranged in the second conveying section Z2 to treat the surface 210 of the ball 21 with a conductive liquid to form a charged state (conductive state). The buffer station 13 is disposed in the third conveying section Z3 to volatilize the solvent (solvent in the conductive liquid) remaining on the surface 210 of the sphere 21. The electrostatic spraying station 14 is disposed in the rotating section Z4 to apply a charged coating on the surface 210 of the sphere 21, wherein the charged coating is attached to the surface 210 of the sphere 21 by charge adsorption (positive and negative charges attract each other). Further, the positively or negatively charged coating particles can attract each other with the surface 210 with opposite charges to move toward the surface 210 and attach thereto. The main arrangement or configuration of each workstation will be further described below.

As shown in FIGS. 3 to 8 , in actual application, the golf ball surface coating machine 1 includes a conveying device 15 to convey the ball 21 to a target position (a position for collecting finished golf balls) along the golf ball conveying path Z. The conveying device 15 includes a conveyor 151 and a plurality of rotating holders 152. The conveyor 151 can be set to be substantially parallel to the ground, and the conveyor 151 defines the golf ball conveying path Z; the conveyor 151 can be a belt conveyor, but is not limited thereto. Each rotating holder 152 is configured to hold a ball 21 and move on the conveyor 151, and each rotating holder 152 can drive the held ball 21 to perform a rotational motion. Furthermore, each rotating holder 152 may include a transfer driving component 1521 and a holding component 1522 disposed on the transfer driving component 1521, wherein the holding component 1522 may include at least three supporting positioning columns evenly distributed along the cross-sectional profile of the transfer driving component 1521, which can make the ball 21 rotate at a predetermined height position above the transfer driving component 1521. However, the above description is only a feasible implementation method and is not intended to limit the present invention.

As shown in FIG. 3 and FIG. 4 , the electrostatic dust removal station 11 is provided with at least one electrostatic gun 111, which is connected to an ion generator (not shown in the figure) to spray a concentrated airflow with positive and negative ions to the ball 21 transported to the first transport section Z1, and cooperate with the rotating holder 152 to drive the ball 21 to rotate, and electrostatically eliminate (electrostatically neutralize) the charged objects attached to the surface 210 and blow them away, thereby achieving the effect of dust removal and ensuring the quality of surface coating; in this process, the ball 21 can be driven by the transfer drive component 1521 to rotate at a predetermined speed relative to the electrostatic gun 111. In addition, the electrostatic dust removal station 11 defines a first horizontal reference plane P1, wherein the sphere 21 transported to the first transport section Z1 is located on the first horizontal reference plane P1, that is, the sphere 21 can be divided into upper and lower parts by the first horizontal reference plane P1, and preferably the center 21c of the sphere is located on the first horizontal reference plane P1.

In the present invention, the electrostatic dust removal station 11 is provided with at least one upper electrostatic gun 111a and at least one lower electrostatic gun 111b, and the at least one upper electrostatic gun 111a and at least one lower electrostatic gun 111b are arranged vertically symmetrically relative to the first horizontal reference plane P1 to increase the coverage area of the ion gas flow so that all surface areas of the sphere 21 can be fully affected by the ion gas flow. Preferably, at least one upper electrostatic gun 111a is disposed above the first horizontal reference plane P1, and the angle θ1 formed between the emission direction F1 and the first horizontal reference plane P1 _is 20 degrees to 30 degrees; at least one lower electrostatic gun 111b is disposed below the first horizontal reference plane P1, and the angle θ2 formed between the emission direction F2 and the first horizontal reference plane P1 is 20 degrees to 30 degrees. ₂ is 20 to 30 degrees; at least one upper electrostatic gun 111a and at least one lower electrostatic gun 111b are set to have a relative distance D1 of 8 to 16 cm from the ball 21 transported to the first transport section Z1, that is, the shortest horizontal distance between at least one upper electrostatic gun 111a and at least one lower electrostatic gun 111b and the ball 21 transported to the first transport section Z1 is 8 to 16 cm. In actual application, in order to improve the effect of electrostatic dust removal, the number of upper electrostatic guns 111a and lower electrostatic guns 111b is two each, but the present invention is not limited thereto.

As shown in FIG. 2 and FIG. 5 , the surface treatment station 12 is provided with at least one conductive liquid spray gun 121 for spraying conductive liquid to the ball 21 transported to the second transport section Z2, and cooperates with the rotary holder 152 to drive the ball 21 to rotate, so that the conductive liquid covers the surface 210 to form a conductive layer 22, wherein the conductive layer 22 has a wet weight of 5 mg to 60 mg due to the solvent contained therein; in an embodiment not shown, the conductive liquid can be transported from the liquid storage tank to the conductive liquid spray gun 121 through a pipeline under the action of a pump component. In addition, the surface treatment station 12 defines a second horizontal reference plane P2, wherein the sphere 21 transported to the second transport section Z2 is located on the second horizontal reference plane P2, that is, the sphere 21 can be divided into two parts, upper and lower, by the second horizontal reference plane P2, and preferably the center 21c of the sphere is located on the second horizontal reference plane P2.

In the present invention, at least one conductive liquid spray gun 121 is disposed above the second horizontal reference plane P2, and its emission direction F3 is tilted downward relative to the second horizontal reference plane P2, so that the surface 210 of the sphere 21 is uniformly and completely covered with conductive liquid. Preferably, the angle θ3 formed between the emission direction F3 of the at least one conductive liquid spray gun ₁₂₁ and the second horizontal reference plane P2 is 35 degrees to 45 degrees; the at least one conductive liquid spray gun 121 is disposed at a relative distance D2 of 8 cm to 16 cm from the sphere 21 transported to the second transport section Z2, that is, the shortest horizontal distance between the at least one conductive liquid spray gun 121 and the sphere 21 transported to the second transport section Z2 is 8 cm to 16 cm.

As shown in FIG6 , the buffer station 13 is provided with a volatilization chamber 131 so that the ball 21 transported to the third transport section Z3 can completely volatilize the solvent in the conductive liquid in the volatilization chamber 131. In the present invention, the volatilization chamber 131 can provide a constant temperature and humidity environment, so when the ball 21 moves toward the rotating section Z4 in the volatilization chamber 131, the solvent in the conductive liquid can be volatilized and dried. Further, after the ball 21 transported to the third transport section Z3 leaves the volatilization chamber 131, the conductive layer 22 on its surface 210 has a dry weight of 0 mg to 40 mg. Preferably, the volatility chamber 131 is set to have a temperature of 23°C to 27°C and a relative humidity of 55% to 75%, and the retention time of the ball 21 transported to the third transport section Z3 in the volatility chamber 131 is 1 minute to 3 minutes.

As shown in FIG. 2 , FIG. 7 and FIG. 8 , the electrostatic spraying station 14 is provided with a disc-type spray head 141, which can generate centrifugal force by rotating to throw the charged paint from the outer periphery of the disc and evenly scatter it in the form of droplets. At the same time, the paint moves toward the surface 210 of the sphere 21 by the driving force generated by charge adsorption. The paint particles can be positively or negatively charged, and the surface of the sphere 21 The surface 210 of the ball 21 is oppositely charged to attract the paint particles; in this process, the conveyor 151 is used to convey the ball 21 around the disc-type nozzle 141, and the rotating holder 152 drives the ball 21 to rotate, so that all areas of the surface 210 of the ball 21 can be attached with a certain thickness of paint particles, thereby forming a uniform coating layer 23. After the coating layer 23 is solidified, the finished golf ball 2 is obtained. In actual application, the disc-type nozzle 141 can be connected to the driving device 143 through a rotating shaft 142, and can continuously receive paint through a feeding pipe 144. In addition, the disc-type nozzle 141 is electrically connected to an electrostatic generator (not shown in the figure) so that the coating material is charged when entering the disc-type nozzle 141.

In the present invention, the disc-type spray head 141 is configured to spray charged coating at a rotation speed of 100 rpm to 1000 rpm. In addition, the electrostatic spraying station 14 defines a third horizontal reference plane P3, wherein the sphere 21 transported to the rotating section Z4 may be located on the third horizontal reference plane P3 or near the third horizontal reference plane P3, and there is a tilt angle θ ₄ between the disc-type spray head 141 and the third horizontal reference plane P3, and the tilt angle is 5 degrees to 15 degrees.

As shown in FIG. 9 , the golf ball surface coating machine 1 of the present invention may also include a baking device 16. After leaving the rotating section Z4, the ball 21 with the coating 23 may be transported to the baking device 16 by the conveyor 151, and baked while moving toward the target position, so as to shorten the curing time of the coating 23.

[Second embodiment]

Referring to FIG. 10 , and in conjunction with FIGS. 1 to 7 , the second embodiment of the present invention provides a golf ball surface coating machine 1, which includes a golf ball conveying path Z, an electrostatic dust removal station 11, a surface treatment station 12, a buffer station 13, and an electrostatic spraying station 14. The golf ball conveying path Z is configured to convey one or more balls 21 to a target location, and the golf ball conveying path Z includes a first conveying section Z1, a second conveying section Z2 located after the first conveying section Z1, a third conveying section Z3 located after the second conveying section Z2, and a rotating section Z4 located after the third conveying section Z3. The electrostatic dust removal station 11 is arranged in the first conveying section Z1 and is provided with at least one electrostatic gun 111 to perform electrostatic dust removal treatment on the sphere 21 conveyed to the first conveying section Z1. The surface treatment station 12 is arranged in the second conveying section Z2 and is provided with at least one conductive liquid spray gun 121 to spray a conductive liquid to the sphere 21 conveyed to the second conveying section Z2 so that its surface 210 forms a charged state (conductive state). The buffer station 13 is arranged in the third conveying section Z3 and is provided with a volatilization chamber 131 so that the sphere 21 conveyed to the third conveying section Z3 volatilizes the solvent in the conductive liquid in the volatilization chamber 131. The electrostatic spraying station 14 is disposed in the rotating section Z4 and is provided with a disc-type spray head 141 to spray a charged coating onto the sphere 21 transported to the rotating section Z4, wherein the charged coating adheres to the surface 210 of the sphere 21 by charge adsorption (positive and negative charges attract each other).

The special feature of the second embodiment of the present invention is that the golf ball conveying path Z includes a ball conveying section Z5 located before the first conveying section Z1, and one or more guiding mechanisms 17 are provided in the ball conveying section Z5 to guide and position the ball 21 entering the ball conveying section Z5 on the corresponding rotating holder 152. Further, each guiding mechanism 17 may include two guiding blocks 171 arranged opposite to each other, and the two guiding blocks 171 are arranged to move in a direction approaching each other and surround a guiding groove 172, the spatial configuration of the guiding groove 172 matches the shape of the ball 21, and the guiding groove 172 corresponds to the position of the rotating holder 152. Therefore, when the ball 21 is located in the guiding groove 172, the guiding and positioning of the ball 21 is completed.

The relevant technical details mentioned in the first embodiment are still valid in this embodiment, and in order to reduce repetition, they are not repeated here. Similarly, the relevant technical details mentioned in this embodiment can also be applied in the first embodiment.

[Beneficial Effects of Embodiments]

The golf ball surface coating machine provided by the present invention is characterized by "an electrostatic dust removal station is arranged in the first conveying section to perform electrostatic dust removal treatment on the ball", "a surface treatment station is arranged in the second conveying section to treat the surface of the ball with a conductive liquid to make it charged", "a buffer station is arranged in the third conveying section to volatilize the solvent left on the surface of the ball" and "an electrostatic spray coating station is arranged in the rotating section , to apply a charged coating on the surface of the sphere, wherein the charged coating is attached to the surface of the sphere by charge adsorption, "the required coating (such as topcoat coating) can be evenly coated on the surface of the sphere to form a coating layer with uniform coating and high quality, and in the process, the coating particles can be reliably attached to the surface of the sphere, thereby reducing the flying pollution of the coating and improving the utilization rate of the coating.

Furthermore, the golf ball surface coating machine of the present invention can continuously process a large number of golf balls, and the entire process can be fully automated without the need for manual operation, which helps to realize the automated production of golf balls.

The contents disclosed above are only preferred feasible embodiments of the present invention and are not intended to limit the scope of the patent application of the present invention. Therefore, all equivalent technical changes made using the contents of the specification and drawings of the present invention are included in the scope of the patent application of the present invention.

1: Golf ball surface coating machine 11: Electrostatic dust removal station 111: Electrostatic gun 111a: Upper electrostatic gun 111b: Lower electrostatic gun 12: Surface treatment station 121: Conductive liquid spray gun 13: Buffer station 131: Volatilization chamber 14: Electrostatic spray station 141: Disc nozzle 15: Conveying equipment 151: Conveyor 152: Rotating holder 16: Baking equipment 17: Guiding mechanism 171: Guiding block 172: Guiding groove 2: golf ball 21: ball 21c: ball center 210: surface 22: conductive layer 23: coating D1, D2: relative distance F1, F2, F3: emission direction P1: first horizontal reference plane P2: second horizontal reference plane P3: third horizontal reference plane Z: golf ball transport path Z1: first transport section Z2: second transport section Z3: third transport section Z4: rotation section Z5: ball transport section θ ₁ , θ ₂ , θ ₃ : angle θ ₄ : tilt angle

FIG. 1 is a configuration diagram of a golf ball surface coating machine according to the present invention.

FIG. 2 is a schematic diagram of the structure of a finished golf ball obtained after being processed by the golf ball surface coating machine of the present invention.

FIG. 3 is a schematic diagram showing one operation of the electrostatic dust removal station of the golf ball surface coating machine of the present invention.

FIG. 4 is another operation schematic diagram of the electrostatic dust removal station of the golf ball surface coating machine of the present invention.

FIG. 5 is a schematic diagram of the operation of the surface treatment station of the golf ball surface coating machine of the present invention.

FIG6 is a schematic diagram of the operation of the buffer station of the golf ball surface coating machine of the present invention.

FIG. 7 is a schematic diagram showing one operation of the electrostatic spray coating station of the golf ball surface coating machine of the present invention.

FIG. 8 is another operation schematic diagram of the electrostatic spray coating station of the golf ball surface coating machine of the present invention.

FIG. 9 is a schematic diagram showing the operation of the baking device of the golf ball surface coating machine of the present invention.

FIG. 10 is a schematic diagram showing the operation of the guide mechanism of the golf ball surface coating machine of the present invention.

1: Golf ball surface coating machine

11: Electrostatic dust removal station

12: Surface treatment station

13: Buffer station

14: Electrostatic spray painting station

16: Baking equipment

Z: Golf ball transport path

Z1: The first conveying section

Z2: Second conveying section

Z3: The third transport section

Z4: Rotation section

Z5: Ball delivery section

Claims (9)

A golf ball surface coating machine, comprising: A golf ball conveying path, configured to convey a plurality of golf balls to a target location, the golf ball conveying path comprising a first conveying section, a second conveying section located after the first conveying section, a third conveying section located after the second conveying section, and a rotating section located after the third conveying section; An electrostatic dust removal station is arranged in the first conveying section and is provided with at least one electrostatic gun to perform electrostatic dust removal on the golf balls conveyed to the first conveying section. The electrostatic dust removal station defines a first horizontal reference plane. The golf balls conveyed to the first conveying section are located on the first horizontal reference plane. The at least one electrostatic gun includes at least one upper electrostatic gun arranged at a downward inclination of 20 to 30 degrees relative to the first horizontal reference plane, and at least one lower electrostatic gun arranged at an upward inclination of 20 to 30 degrees relative to the first horizontal reference plane. The at least one upper electrostatic gun and the at least one lower electrostatic gun are arranged at a relative distance of 8 to 16 centimeters from the golf balls conveyed to the first conveying section. A surface treatment station, arranged in the second conveying section and provided with at least one conductive liquid spray gun, to spray a conductive liquid to the golf ball conveyed to the second conveying section to make the surface thereof charged; A buffer station, arranged in the third conveying section and provided with a volatilization chamber, so that the golf ball conveyed to the third conveying section volatilizes the solvent in the conductive liquid in the volatilization chamber; and An electrostatic spraying station, arranged in the rotating section and provided with a disc-type spray head, to spray a charged coating to the golf ball conveyed to the rotating section, wherein the charged coating is attached to the surface of the golf ball by charge adsorption. A golf ball surface coating machine as described in claim 1, wherein the surface treatment station defines a second horizontal reference plane, and the golf ball transported to the second transport section is located on the second horizontal reference plane; wherein at least one of the conductive liquid spray guns is disposed above the second horizontal reference plane. A golf ball surface coating machine as described in claim 2, wherein at least one of the conductive liquid spray guns is tilted downward by 35 to 45 degrees relative to the second horizontal reference plane, and at least one of the conductive liquid spray guns is arranged to have a relative distance of 8 to 16 centimeters from the golf ball transported to the second transport section. A golf ball surface coating machine as described in claim 1, wherein the volatility chamber is set to have a temperature of 23°C to 27°C and a relative humidity of 55% to 75%, and the residence time of the golf ball transported to the third transport section in the volatility chamber is 1 minute to 3 minutes. A golf ball surface coating machine as described in claim 4, wherein, in the surface treatment station, the conductive liquid sprayed by at least one of the conductive liquid spray guns coats the surface of the golf ball transported to the second transport section to form a conductive layer, and the conductive layer has a wet weight of 5 mg to 60 mg; wherein, in the buffer station, after the golf ball transported to the third transport section leaves the volatilization chamber, the conductive layer on its surface has a dry weight of 0 mg to 40 mg. A golf ball surface coating machine as described in claim 1, wherein the electrostatic spray coating station defines a third horizontal reference plane, and there is a tilt angle between the disc-type spray head and the third horizontal reference plane, and the tilt angle is 5 degrees to 15 degrees. A golf ball surface coating machine as described in claim 6, wherein the disc-type spray head is configured to spray the charged coating at a rotation speed of 100 rpm to 1000 rpm. The golf ball surface coating machine as described in claim 1 also includes a conveying device, wherein the conveying device includes a conveyor and a plurality of rotating holders, wherein the conveyor defines the golf ball conveying path, and each of the rotating holders is configured to hold one of the golf balls and move it on the conveyor. In the golf ball surface coating machine as described in claim 8, the golf ball transport path includes a ball transport section located before the first transport section, and a plurality of guide mechanisms are provided in the ball transport section to guide and position one or more golf balls on the corresponding rotating holder.

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