Surface spraying device and method for plastic toys

Abstract

The invention belongs to the technical field of plastic toy production, and particularly relates to a surface spraying device and method for plastic toys, the device is reasonable in design and mainly comprises a rotary positioning assembly, an oil scraping assembly and a polishing and oil spraying integrated assembly, all the parts cooperate with one another, and for the to-be-sprayed screw type plastic toys, the surface of the to-be-sprayed screw type plastic toys can be effectively sprayed. The rotary positioning assembly can drive the screw type plastic toys to revolve to enter the spraying stations in sequence and drive the screw type plastic toys to rotate on the spraying stations. The polishing and oil spraying integrated assembly can conduct polishing treatment on screws of the screw type plastic toys and then conduct spraying twice, the oil scraping operation of the oil scraping assembly is matched, different coatings can be sprayed to the smooth faces and the threaded groove faces of the screws, and the requirement for better showing the threaded groove structures of the plastic toys is met.

Description

Technical Field

[0001] The present invention belongs to the technical field of plastic toy production, and particularly relates to a surface spraying device and a spraying method for plastic toys. Background Art

[0002] The functions of the oil spraying device in screw-type plastic toys are mainly reflected in the following aspects: 1) Enhancing the appearance beauty: Screw-type plastic toys often need to attract consumers' attention through colors, especially for the children's market. The oil spraying device can provide uniform and bright coatings for these toys, increasing the visual attraction of the toys. Different colors, glosses, and textures can be achieved through precise oil spraying processes, making the toys more vivid and interesting. 2) Improving durability and protection: The oil spraying layer can not only beautify the toys, but also protect the plastic material from wear, scratches, and ultraviolet damage to a certain extent. For details such as screws, oil spraying can provide additional lubricity and corrosion resistance, reducing damage caused by frequent use or environmental factors and extending the service life of the toys. 3) Safety signs and warnings: On screw-type plastic toys, the oil spraying device is often used to add safety warning signs or age suitability marks. These signs are crucial for guiding parents to correctly select and use toys, and help ensure that the toys are used safely and appropriately. 4) Improving the hand feeling and interactive experience: Through oil spraying treatment, the touch of the toy surface can be adjusted to make it softer, more comfortable, or have specific friction to meet different game needs. For example, adding an anti-slip coating to the screw part can help children grip more easily when assembling or disassembling toys, enhancing the fun and interactivity of playing.

[0003] The existing surface spraying devices for the production of screw-type plastic toys have deficiencies. One is that they cannot spray different coatings on the smooth surface and the thread groove surface of the screw part of the screw-type plastic toys; the other is that they cannot deburr the thread grooves of the screw part of the screw-type plastic toys before spraying, which affects the spraying effect and the realization of the functions of the screw-type plastic toys. Therefore, it is necessary to optimize and improve the traditional automotive interior armrest parts. Summary of the Invention

[0004] The purpose of the present invention is to overcome the above problems existing in the prior art, and provide a surface spraying device and a spraying method for plastic toys.

[0005] To achieve the above technical purposes and reach the above technical effects, the present invention is realized through the following technical solutions:

[0006] The present invention provides a surface spraying device for plastic toys, and the surface spraying device includes a rotary positioning assembly, an oil scraping assembly, and a polishing and oil spraying integrated assembly;

[0007] The screw-type plastic toy to be sprayed is composed of an end and a screw, the outer side of the end is provided with a positioning groove inwardly, the positioning groove is a cross groove or a hexagonal groove, and the screw includes a smooth surface and a thread groove surface;

[0008] The rotary positioning assembly is provided with a spraying station, and the rotary positioning assembly can drive the screw-type plastic toys to revolve and enter the spraying station in sequence, and the rotary positioning assembly can drive the screw-type plastic toys to rotate at the spraying station;

[0009] The oil scraping assembly is arranged at the periphery of the spraying station and is used to scrape the oil on the smooth surface of the screw;

[0010] The polishing and oil-spraying integrated assembly is arranged above the spraying station and is used for grinding the thread grooves of the screw and performing oil-spraying treatment.

[0011] Furthermore, in the surface spraying device of the above-mentioned plastic toy, the rotation positioning assembly includes a first substrate, a first servo motor, a first rotating plate, a first bracket, a second servo motor and a positioning block, the first substrate is equipped with a first servo motor, the output end of the first servo motor is equipped with a first rotating plate, the first rotating plate is provided with a plurality of rotation positions along the circumferential direction, the second servo motor is equipped with the first bracket below each rotation position, the output shaft of the second servo motor passes through the first rotating plate and is equipped with a positioning block, and the shape of the positioning block matches the shape of the positioning groove.

[0012] Furthermore, in the surface spraying device for plastic toys, an annular support plate is commonly installed on the inner side of each of the first brackets, and a plurality of support rollers for supporting the annular support plate are circumferentially installed on the upper side of the first substrate.

[0013] Furthermore, in the surface spraying device of the above-mentioned plastic toy, the oil scraping assembly includes a second base plate, a horizontal push rod, a straightening joint tube, a mounting plate, an oil scraping block and an oil suction pump, a horizontal push rod and a straightening joint tube are installed between the second base plate and the mounting plate, an oil scraping block is installed on the outer side of the mounting plate, and an oil suction pump for providing suction force for the oil scraping block is installed on the inner side of the mounting plate.

[0014] Furthermore, in the surface spraying device of the above-mentioned plastic toy, the oil scraper block includes a block body, an oil suction groove is opened in the middle part of the front section of the block body, and both sides of the oil suction groove are respectively provided with an avoidance inclined surface and an arc surface matching with the smooth surface of the screw rod, a scraping blade is provided at the connection between the arc surface and the oil suction groove, and the rear side of the oil suction groove is provided with an oil suction channel connected to the oil suction pump.

[0015] Further, in the surface spraying device for the above-mentioned plastic toy, the polishing and oil spraying integrated component includes a second rotating plate, a lifting and rotating driving mechanism, a polishing mechanism 33, and an oil spraying mechanism. At the center of the upper side of the second rotating plate, a lifting and rotating driving mechanism for driving it to perform lifting and rotating actions is installed. Along the circumferential direction of the second rotating plate, a polishing mechanism 33 and three oil spraying mechanisms are installed. The three oil spraying mechanisms are respectively used for spraying the first coating liquid, the protective liquid, and the second coating liquid.

[0016] Further, in the surface spraying device for the above-mentioned plastic toy, the lifting and rotating driving mechanism includes a channel-shaped plate, a vertical push rod, a third servo motor, a rotary joint, a hexagonal column, and a first belt transmission member. The vertical push rod is fixedly embedded in the upper plate of the channel-shaped plate. The movable end of the vertical push rod is connected to the upper end of the hexagonal column through a rotary joint. The lower end of the hexagonal column is fixed to the second rotating plate. The third servo motor is fixed on the outside of the channel-shaped plate. The output shaft of the third servo motor is in transmission connection with the hexagonal column through the first belt transmission member.

[0017] Further, in the surface spraying device for the above-mentioned plastic toy, the polishing mechanism 33 includes a second bracket, a dust suction pump, an air passing slip ring, a suction pipe, a polishing cylinder, a dust suction cavity, a deburring protrusion, a fourth servo motor, and a second belt transmission member. The dust suction pump is fixed on the outside of the second rotating plate through the second bracket. The input pipe of the dust suction pump is connected to the upper end of the suction pipe through the air passing slip ring. The lower end of the suction pipe is fixed with a polishing cylinder. The inside of the polishing cylinder is provided with a dust suction cavity communicated with the suction pipe. The inner wall of the dust suction cavity is provided with a deburring protrusion. The fourth servo motor is fixed on the lower side of the second rotating plate. The output shaft of the fourth servo motor is in transmission connection with the suction pipe through the second belt transmission member.

[0018] Further, in the surface spraying device for the above-mentioned plastic toy, the oil spraying mechanism includes a material bin, an oil spraying cylinder, an oil spraying cavity, and an oil spraying pipe. The material bin and the oil spraying cylinder are fixed on both sides of the second rotating plate. The inside of the oil spraying cylinder is provided with an oil spraying cavity. The top end of the oil spraying cavity is connected to the oil pump in the material bin through the oil spraying pipe.

[0019] The present invention also provides a surface spraying method for a plastic toy, which is realized based on the above-mentioned surface spraying device. The method includes the following steps:

[0020] S1. Batch place the screw-type plastic toys to be sprayed on the rotary positioning component, so that the positioning grooves of the screw-type plastic toys are clamped into the corresponding positioning blocks;

[0021] S2. The lifting and rotating drive mechanism in the polishing and spraying integrated component drives the second rotating plate to rotate, so that the polishing mechanism 33 is located above the spraying station. Then, the lifting and rotating drive mechanism drives the polishing mechanism to descend, and the rotating and positioning component synchronously drives the screw-type plastic toy to rotate slowly. The burrs at the edge of the thread groove surface are polished and removed by the deburring protrusions. The dust suction pump quickly sucks the burrs dissipated in the dust suction cavity through the air slip ring and the suction pipe.

[0022] S3. The lifting and rotating drive mechanism in the polishing and spraying integrated component drives the second rotating plate to rotate, so that the spraying mechanism filled with the first coating liquid is located above the spraying station. Then, the lifting and rotating drive mechanism drives the spraying mechanism to descend, and sprays the first coating liquid on the screw of the screw-type plastic toy. The horizontal push rod of the oil scraping component is started, and the oil scraping block abuts against the outer side of the screw. The rotating and positioning component synchronously drives the screw-type plastic toy to rotate slowly, and uses the oil scraping block to scrape the first coating liquid on the smooth surface and quickly sucks it out by the oil suction pump.

[0023] S4. The lifting and rotating drive mechanism in the polishing and spraying integrated component drives the second rotating plate to rotate, so that the spraying mechanism filled with the protective liquid is located above the spraying station. Then, the lifting and rotating drive mechanism drives the spraying mechanism to descend, and sprays the protective liquid on the screw of the screw-type plastic toy. The horizontal push rod of the oil scraping component is started, and the oil scraping block abuts against the outer side of the screw. The rotating and positioning component synchronously drives the screw-type plastic toy to rotate slowly, and uses the oil scraping block to scrape the protective liquid on the smooth surface and quickly sucks it out by the oil suction pump.

[0024] S5. The lifting and rotating drive mechanism in the polishing and spraying integrated component drives the second rotating plate to rotate, so that the spraying mechanism filled with the third coating liquid is located above the spraying station. Then, the lifting and rotating drive mechanism drives the spraying mechanism to descend, and sprays the third coating liquid on the screw of the screw-type plastic toy. The rotating and positioning component drives the screw-type plastic toy to rotate quickly, and uses the centrifugal force to quickly separate the protective oil layer formed by the protective oil in the thread groove surface from the first coating formed by the first coating liquid.

[0025] The beneficial effects of the present invention are as follows:

[0026] The device of the present invention is reasonably designed. It is mainly composed of a rotating and positioning component, an oil scraping component, and a polishing and spraying integrated component. Each component cooperates with each other. For the screw-type plastic toy to be sprayed, the rotating and positioning component can drive the screw-type plastic toy to revolve to sequentially enter the spraying station and drive the screw-type plastic toy to rotate self in the spraying station. The polishing and spraying integrated component can polish the screw of the screw-type plastic toy and then spray twice. With the oil scraping operation of the oil scraping component, different coatings can be sprayed on the smooth surface and the thread groove surface of the screw, meeting the requirement of better displaying the thread groove structure of the plastic toy.

[0027] Of course, it is not necessary for any product implementing the present invention to achieve all of the above advantages simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0029] Figure 1 is a schematic structural diagram of the whole of the present invention;

[0030] Figure 2 is a schematic structural diagram of the screw-type plastic toy in the present invention;

[0031] Figure 3 is a schematic structural diagram of the rotation positioning component in the present invention;

[0032] Figure 4 is a schematic structural diagram of the oil scraping component in the present invention;

[0033] Figure 5 is a schematic structural diagram of the oil scraping block in the present invention;

[0034] Figure 6 is a schematic structural diagram of the polishing and oil spraying integrated component in the present invention;

[0035] Figure 7 is a schematic structural diagram of the lifting and rotating drive mechanism in the present invention;

[0036] Figure 8 is a schematic structural diagram of the polishing mechanism and the oil spraying mechanism in the present invention;

[0037] In the drawings, the components represented by the respective reference numerals are as follows:

[0038] 1 - rotation positioning component, 11 - first substrate, 12 - first servo motor, 13 - first rotating plate, 14 - first bracket, 15 - second servo motor, 16 - positioning block, 17 - annular support plate, 18 - support roller;

[0039] 2 - oil scraping component, 21 - second substrate, 22 - horizontal push rod, 23 - straightening pipe, 24 - mounting plate, 25 - oil scraping block, 251 - block body, 252 - oil absorption groove, 253 - avoidance inclined surface, 254 - arc surface, 255 - scraping edge, 256 - oil absorption channel, 26 - oil suction pump;

[0040] 3 - Polishing and oil - spraying integrated component, 31 - Second rotating plate, 32 - Lifting and rotating drive mechanism, 321 - Grooved plate, 322 - Vertical push rod, 323 - Third servo motor, 324 - Rotary joint, 325 - Hexagonal column, 326 - First belt drive component, 33 - Polishing mechanism, 331 - Second bracket, 332 - Dust suction pump, 333 - Air - passing slip ring, 334 - Suction pipe, 335 - Polishing cylinder, 336 - Dust suction cavity, 337 - Deburring protrusion, 338 - Fourth servo motor, 339 - Second belt drive component, 34 - Oil - spraying mechanism, 341 - Silo, 342 - Oil - spraying cylinder, 343 - Oil - spraying cavity, 344 - Oil - spraying pipe;

[0041] 4 - Screw - type plastic toy, 41 - End head, 42 - Smooth surface, 43 - Thread - grooved surface, 44 - Positioning groove. Specific embodiments

[0042] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0043] As Figures 1-8 shown, this embodiment provides a surface spraying device for plastic toys. The surface spraying device includes a rotary positioning component 1, an oil scraping component 2, and a polishing and oil - spraying integrated component 3.

[0044] In this embodiment, the screw - type plastic toy 4 to be sprayed is composed of an end head 41 and a screw. A positioning groove 44 is inwardly formed on the outer side of the end head 41. The positioning groove 44 is a cross - groove or an internal hexagonal groove. The screw includes a smooth surface 42 and a thread - grooved surface 43.

[0045] In this embodiment, the rotary positioning component 1 is provided with a spraying station. The rotary positioning component 1 can drive the screw - type plastic toy 4 to revolve to sequentially enter the spraying station, and the rotary positioning component 1 can drive the screw - type plastic toy 4 to rotate at the spraying station.

[0046] In this embodiment, the rotation positioning assembly 1 includes a first substrate 11, a first servo motor 12, a first rotating plate 13, a first bracket 14, a second servo motor 15, and a positioning block 16. The first servo motor 12 is installed on the first substrate 11, and the output end of the first servo motor 12 is installed with the first rotating plate 13. The first rotating plate 13 is provided with a plurality of self-rotation positions along the circumferential direction. Below each self-rotation position, a second servo motor 15 is installed through the first bracket 14. The output shaft of the second servo motor 15 penetrates the first rotating plate 13 and is installed with the positioning block 16. The shape of the positioning block 16 matches the shape of the positioning groove 44. An annular support plate 17 is commonly installed inside each of the first brackets 14, and a plurality of support rollers 18 for supporting the annular support plate 17 are installed along the circumferential direction on the upper side of the first substrate 11.

[0047] In this embodiment, the oil scraping assembly 2 is arranged at the periphery of the spraying station and is used to scrape the oil liquid on the smooth surface 42 of the screw. The oil scraping assembly 2 includes a second substrate 21, a horizontal push rod 22, a straightening joint pipe 23, a mounting plate 24, an oil scraping block 25, and an oil suction pump 26. A horizontal push rod 22 and a straightening joint pipe 23 are installed between the second substrate 21 and the mounting plate 24. The oil scraping block 25 is installed on the outer side of the mounting plate 24, and an oil suction pump 26 for providing a suction force for the oil scraping block 25 is installed on the inner side of the mounting plate 24.

[0048] In this embodiment, the oil scraping block 25 includes a block body 251. An oil suction groove 252 is formed in the middle of the front section of the block body 251. Avoidance inclined surfaces 253 and arc surfaces 254 that cooperate with the smooth surface 42 of the screw are respectively arranged on both sides of the oil suction groove 252. A scraping edge 255 is arranged at the connection between the arc surface 254 and the oil suction groove 252. An oil suction channel 256 communicated with the oil suction pump 26 is arranged at the rear side of the oil suction groove 252.

[0049] In this embodiment, the polishing and oil spraying integrated assembly 3 is arranged above the spraying station and is used for grinding the thread grooves of the screw and spraying oil. The polishing and oil spraying integrated assembly 3 includes a second rotating plate 31, a lifting and rotating drive mechanism 32, a polishing mechanism 33, and an oil spraying mechanism 34. A lifting and rotating drive mechanism 32 for driving it to perform lifting and rotating actions is installed at the center of the upper side of the second rotating plate 31. One polishing mechanism 33 and three oil spraying mechanisms 34 are installed along the circumferential direction of the second rotating plate 31. The three oil spraying mechanisms 34 are respectively used for spraying the first coating liquid, the protective liquid, and the second coating liquid.

[0050] In this embodiment, the lifting and rotating drive mechanism 32 includes a channel-shaped plate 321, a vertical push rod 322, a third servo motor 323, a rotary joint 324, a hexagonal column 325, and a first belt transmission member 326. The upper plate of the channel-shaped plate 321 is embedded and fixed with the vertical push rod 322. The movable end of the vertical push rod 322 is connected to the upper end of the hexagonal column 325 through the rotary joint 324, and the lower end of the hexagonal column 325 is fixed to the second rotating plate 31. The third servo motor 323 is fixed to the outside of the channel-shaped plate 321, and the output shaft of the third servo motor 323 is in transmission connection with the hexagonal column 325 through the first belt transmission member 326.

[0051] In this embodiment, the polishing mechanism 33 includes a second bracket 331, a dust suction pump 332, an air passing slip ring 333, a suction pipe 334, a polishing cylinder 335, a dust suction cavity 336, a deburring protrusion 337, a fourth servo motor 338, and a second belt transmission member 339. The dust suction pump 332 is fixed to the outside of the second rotating plate 31 through the second bracket 331. The input pipe of the dust suction pump 332 is connected to the upper end of the suction pipe 334 through the air passing slip ring 333, and the lower end of the suction pipe 334 is fixed with the polishing cylinder 335. A dust suction cavity 336 communicating with the suction pipe 334 is provided inside the polishing cylinder 335, and a deburring protrusion 337 is arranged on the inner wall of the dust suction cavity 336. The fourth servo motor 338 is fixed to the lower side of the second rotating plate 31, and the output shaft of the fourth servo motor 338 is in transmission connection with the suction pipe 334 through the second belt transmission member 339.

[0052] In this embodiment, the oil spraying mechanism 34 includes a material bin 341, an oil spraying cylinder 342, an oil spraying cavity 343, and an oil spraying pipe 344. The material bin 341 and the oil spraying cylinder 342 are fixed on both sides of the second rotating plate 31. An oil spraying cavity 343 is provided inside the oil spraying cylinder 342, and the top end of the oil spraying cavity 33 is connected to the oil pump built in the material bin 341 through the oil spraying pipe 344.

[0053] This embodiment also provides a surface spraying method for plastic toys, and the method includes the following steps:

[0054] S1. Place a batch of screw-type plastic toys 4 to be sprayed on the rotary positioning assembly 1, so that the positioning grooves 44 of the screw-type plastic toys 4 are snapped into the corresponding positioning blocks 16;

[0055] S2. The lifting and rotating drive mechanism 32 in the polishing and oil spraying integrated assembly 3 drives the second rotating plate 31 to rotate, so that the polishing mechanism 33 is located above the spraying station. Then, the lifting and rotating drive mechanism 32 drives the polishing mechanism 33 to descend, and the rotary positioning assembly 1 synchronously drives the screw-type plastic toys 4 to rotate slowly. The deburring protrusion 337 is used to polish and remove the burrs at the edges of the thread groove surfaces 43. The dust suction pump 332 quickly sucks the burrs escaping in the dust suction cavity 336 through the air passing slip ring 333 and the suction pipe 334;

[0056] S3. In the integrated polishing and oil spraying assembly 3, the lifting and rotating drive mechanism 32 drives the second rotating plate 31 to rotate, so that the oil spraying mechanism 34 filled with the first coating liquid is located above the spraying station. Then, the lifting and rotating drive mechanism 32 drives the oil spraying mechanism 34 to descend, and sprays the first coating liquid on the screw of the screw-type plastic toy 4; the horizontal push rod 22 of the oil scraping assembly 2 is started, the oil scraping block 25 abuts against the outside of the screw, and the rotation positioning assembly 1 synchronously drives the screw-type plastic toy 4 to rotate slowly, uses the oil scraping block 25 to scrape the first coating liquid on the smooth surface 42, and quickly sucks it out by the oil suction pump 26;

[0057] S4. In the integrated polishing and oil spraying assembly 3, the lifting and rotating drive mechanism 32 drives the second rotating plate 31 to rotate, so that the oil spraying mechanism 34 filled with the protective liquid is located above the spraying station. Then, the lifting and rotating drive mechanism 32 drives the oil spraying mechanism to descend, and sprays the protective liquid on the screw of the screw-type plastic toy 4; the horizontal push rod 22 of the oil scraping assembly 2 is started, the oil scraping block 25 abuts against the outside of the screw, and the rotation positioning assembly 1 synchronously drives the screw-type plastic toy 4 to rotate slowly, uses the oil scraping block 25 to scrape the protective liquid on the smooth surface 42, and quickly sucks it out by the oil suction pump 26;

[0058] S5. In the integrated polishing and oil spraying assembly 3, the lifting and rotating drive mechanism 32 drives the second rotating plate 31 to rotate, so that the oil spraying mechanism 34 filled with the third coating liquid is located above the spraying station. Then, the lifting and rotating drive mechanism 32 drives the oil spraying mechanism 34 to descend, and sprays the third coating liquid on the screw of the screw-type plastic toy 4; the rotation positioning assembly 1 drives the screw-type plastic toy 4 to rotate quickly, and uses the centrifugal force to quickly separate the protective oil layer formed by the protective oil in the thread groove surface 43 from the first coating formed by the first coating liquid.

[0059] The specific application of this embodiment is as follows: This device is mainly composed of a rotation positioning assembly 1, an oil scraping assembly 2 and an integrated polishing and oil spraying assembly 3. Each component cooperates with each other. For the screw-type plastic toy 4 to be sprayed, the rotation positioning assembly 1 can drive the screw-type plastic toy 4 to revolve to sequentially enter the spraying station, and drive the screw-type plastic toy 4 to rotate self in the spraying station; the integrated polishing and oil spraying assembly 3 can polish the screw of the screw-type plastic toy 4 and then spray twice. With the oil scraping operation of the oil scraping assembly 2, different coatings can be sprayed on the smooth surface 42 and the thread groove surface 43 of the screw, meeting the requirement of the plastic toy to better display the thread groove structure.

[0060] The preferred embodiments of the present invention disclosed above are merely helpful for explaining the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific embodiments. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A surface spraying device for plastic toys, characterized in that The surface spraying device comprises a rotating positioning component, an oil scraping component and a polishing and oil spraying integrated component; The screw-type plastic toy to be sprayed is composed of an end and a screw, the outer side of the end is provided with a positioning groove inwardly, the positioning groove is a cross groove or a hexagonal groove, and the screw includes a smooth surface and a thread groove surface; The rotary positioning assembly is provided with a spraying station, and the rotary positioning assembly can drive the screw-type plastic toys to revolve and enter the spraying station in sequence, and the rotary positioning assembly can drive the screw-type plastic toys to rotate at the spraying station; The oil scraping assembly is arranged at the periphery of the spraying station and is used to scrape the oil on the smooth surface of the screw; The polishing and oil-spraying integrated assembly is arranged above the spraying station and is used for grinding the thread grooves of the screw and performing oil-spraying treatment.

2. The surface spraying device for a plastic toy according to claim 1, wherein, The rotation positioning assembly includes a first substrate, a first servo motor, a first rotating plate, a first bracket, a second servo motor and a positioning block. The first substrate is equipped with a first servo motor, and the output end of the first servo motor is equipped with a first rotating plate. The first rotating plate is provided with a plurality of rotation positions along the circumferential direction, and a second servo motor is installed below each rotation position through the first bracket. The output shaft of the second servo motor passes through the first rotating plate and is equipped with a positioning block, and the shape of the positioning block matches the shape of the positioning groove.

3. The surface spraying device for a plastic toy according to claim 2, wherein, An annular support plate is commonly installed on the inner side of each of the first brackets, and a plurality of support rollers for supporting the annular support plate are circumferentially installed on the upper side of the first substrate.

4. The surface spraying device for a plastic toy according to claim 3, characterized in that, The oil scraper assembly includes a second base plate, a horizontal push rod, a straightening joint tube, a mounting plate, an oil scraper block and an oil suction pump. A horizontal push rod and a straightening joint tube are installed between the second base plate and the mounting plate. An oil scraper block is installed on the outer side of the mounting plate. An oil suction pump for providing suction force for the oil scraper block is installed on the inner side of the mounting plate.

5. The surface spraying device for a plastic toy according to claim 4, characterized in that, The oil scraper block includes a block body, an oil suction groove is opened in the middle of the front section of the block body, and avoidance inclined surfaces and arc surfaces matching the smooth surface of the screw are respectively provided on both sides of the oil suction groove. A scraping blade is provided at the connection between the arc surface and the oil suction groove, and an oil suction channel connected to the oil suction pump is provided on the rear side of the oil suction groove.

6. The surface spraying device for a plastic toy according to claim 1, characterized in that, The integrated polishing and oil-spraying assembly includes a second rotating plate, a lifting and rotating driving mechanism, a polishing mechanism and an oil-spraying mechanism. A lifting and rotating driving mechanism for driving the second rotating plate to perform lifting and rotating actions is installed at the upper center of the second rotating plate. A polishing mechanism and three oil-spraying mechanisms are installed circumferentially on the second rotating plate. The three oil-spraying mechanisms are used to spray the first coating liquid, the protective liquid and the second coating liquid, respectively.

7. The surface spraying device for a plastic toy according to claim 6, wherein, The lifting and rotating drive mechanism includes a groove plate, a vertical push rod, a third servo motor, a rotating joint, a hexagonal column and a first belt transmission member. The upper plate of the groove plate is embedded with a vertical push rod, the movable end of the vertical push rod is connected to the upper end of the hexagonal column via a rotating joint, the lower end of the hexagonal column is fixed to the second rotating plate, and the third servo motor is fixed to the outer side of the groove plate. The output shaft of the third servo motor is connected to the hexagonal column through the first belt transmission member.

8. The surface spraying device for a plastic toy according to claim 6, wherein, The polishing mechanism includes a second bracket, a dust suction pump, a pneumatic slip ring, a suction pipe, a polishing cylinder, a dust suction cavity, deburring protrusions, a fourth servo motor, and a second belt transmission member. The dust suction pump is fixed to the outside of the second rotating plate through the second bracket. The input pipe of the dust suction pump is connected to the upper end of the suction pipe through the pneumatic slip ring. The lower end of the suction pipe is fixed with a polishing cylinder. The inside of the polishing cylinder is provided with a dust suction cavity communicated with the suction pipe. The inner wall of the dust suction cavity is provided with deburring protrusions. The fourth servo motor is fixed to the lower side of the second rotating plate. The output shaft of the fourth servo motor is drivingly connected to the suction pipe through the second belt transmission member.

9. The surface spraying device for a plastic toy according to claim 6, wherein, The oil spraying mechanism includes a material bin, an oil spraying cylinder, an oil spraying cavity, and an oil spraying pipe. The material bin and the oil spraying cylinder are fixed to both sides of the second rotating plate. The inside of the oil spraying cylinder is provided with an oil spraying cavity. The bottom end of the oil spraying cavity is connected to an oil pump arranged in the material bin through the oil spraying pipe.

10. A surface spraying method for a plastic toy, implemented based on the surface spraying device for a plastic toy according to any one of claims 1-9, characterized in that, The method comprises the following steps: S1. Batch-place the screw-type plastic toys to be sprayed on the rotary positioning assembly, such that the positioning grooves of the screw-type plastic toys are snapped into the corresponding positioning blocks. S2. The lifting and rotating drive mechanism in the integrated polishing and oil spraying assembly drives the second rotating plate to rotate, such that the polishing mechanism is located above the spraying station. Then, the lifting and rotating drive mechanism drives the polishing mechanism to descend, and the rotary positioning assembly synchronously drives the screw-type plastic toys to slowly rotate. The deburring protrusions are used to polish and remove the burrs at the edges of the thread groove surfaces. The dust suction pump quickly sucks the burrs dissipated in the dust suction cavity through the pneumatic slip ring and the suction pipe. S3. The lifting and rotating drive mechanism in the integrated polishing and oil spraying assembly drives the second rotating plate to rotate, such that the oil spraying mechanism filled with the first coating liquid is located above the spraying station. Then, the lifting and rotating drive mechanism drives the oil spraying mechanism to descend, and the first coating liquid is sprayed on the screws of the screw-type plastic toys. Start the horizontal push rod of the oil scraping assembly, and the oil scraping block abuts against the outside of the screw. The rotary positioning assembly synchronously drives the screw-type plastic toys to slowly rotate. The oil scraping block is used to scrape the first coating liquid on the smooth surfaces and quickly suck it out by using the oil suction pump. S4. The lifting and rotating drive mechanism in the integrated polishing and oil spraying assembly drives the second rotating plate to rotate, such that the oil spraying mechanism filled with the protective liquid is located above the spraying station. Then, the lifting and rotating drive mechanism drives the oil spraying mechanism to descend, and the protective liquid is sprayed on the screws of the screw-type plastic toys. Start the horizontal push rod of the oil scraping assembly, and the oil scraping block abuts against the outside of the screw. The rotary positioning assembly synchronously drives the screw-type plastic toys to slowly rotate. The oil scraping block is used to scrape the protective liquid on the smooth surfaces and quickly suck it out by using the oil suction pump. S5. The lifting and rotating drive mechanism in the integrated polishing and oil spraying assembly drives the second rotating plate to rotate, such that the oil spraying mechanism filled with the third coating liquid is located above the spraying station. Then, the lifting and rotating drive mechanism drives the oil spraying mechanism to descend, and the third coating liquid is sprayed on the screws of the screw-type plastic toys. The rotary positioning assembly drives the screw-type plastic toys to quickly rotate, and the protective oil layer formed by the protective oil in the thread groove surfaces is quickly separated from the first coating formed by the first coating liquid by using the centrifugal force.

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