A spraying device based on plastic product processing

Abstract

The present invention relates to a spraying device based on plastic product processing and applied in the field of plastic product processing, comprising a frame and a spray head installed on the inner side of the frame through a control pan / tilt platform, a side end of the spray head is provided with an expansion bin connected with the inner side thereof, an elastic movable component is provided on the inner side of the expansion bin, a pre-spraying mechanism is provided on the lower side of the spray head, the pre-spraying mechanism comprises a transmission rod and a pre-spraying plate, the pre-spraying plate is connected with the elastic movable component through the transmission rod, when the spraying of the spray head starts, the sprayed paint is sprayed on the upper surface of the pre-spraying plate, and in the early spraying process, the paint on the inner side of the spray head squeezes the elastic movable component, so that the elastic movable component moves toward a side away from the spray head, thereby bringing the pre-spraying plate to translate toward a side of a spray nozzle away from the spray head through the transmission rod, until the pre-spraying plate cannot completely receive the sprayed paint, the early spraying is completed, and the automatic removal of the early sprayed paint is realized.

Description

Technical Field

[0001] The invention relates to a spraying device, in particular to a spraying device based on plastic product processing and applied in the field of plastic product processing. Background Art

[0002] Plastic products are a general term for daily necessities and industrial products made of plastic as the main raw material, including products made from injection molding, blister molding and other processes using plastic as raw material. Plastic is a type of synthetic polymer material with plasticity. In the processing of plastic products, surface spraying is a common post-processing process used to improve the appearance, performance and durability of the product.

[0003] Under the premise of not affecting the adhesion of the spray, by applying anti-static liquid on the surface of the plastic product, compressed air is passed through a spark discharge device to ionize the air, and then blown onto the plastic surface, both dust and static electricity can be removed. However, before the nozzle is used, there may be a small amount of contamination on its surface. After the anti-static liquid is sprayed out, a small amount of dust enters the anti-static liquid, causing contamination of the anti-static liquid, which in turn affects its use.

[0004] In order to improve the above problems, after searching, the patent disclosure CN112439592B discloses a spraying device for processing plastic products with a static electricity removal device. The spraying device for processing plastic products with a static electricity removal device includes: a processing box; a fixed frame, the two sides of the fixed frame are slidably connected to the two sides inside the processing box; rollers, the two ends of the two rollers are rotatably connected to the two sides inside the fixed frame. The spraying device sprays antistatic liquid on the plastic products to achieve the antistatic effect of the plastic products, which is convenient for the processing of subsequent links. After the spraying is completed, the residual material on the first nozzle is wiped off to prevent the residual material from dripping into the parts inside the processing box and causing certain pollution. At the same time, when the first nozzle is wiped, the second nozzle is also wiped, thereby achieving the effect of dust removal, preventing dust from contaminating the spraying of the next link, thereby improving the practicality of the device.

[0005] However, based on the above search and in combination with the prior art, it is found that after spraying, the paint at the nozzle of the spray device for plastic product processing in the prior art and the spray device for plastic product processing disclosed above will solidify. Even if it is melted by heat later, the spraying quality will still be defective. In order to avoid this problem, manual discarding of the paint in the early stage of spraying is generally adopted, and this operation is obviously more troublesome. Therefore, a spray device based on plastic product processing is proposed to improve the above-mentioned problem. Summary of the invention

[0006] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that after spraying, the paint located at the nozzle of the existing spraying device for processing plastic products will solidify. Even if it is melted by heat later, the spraying quality will still be defective. In order to avoid this problem, it is generally adopted to manually discard the paint in the early stage of spraying, which is obviously more troublesome.

[0007] In order to solve the above problems, the present invention provides a spraying device based on plastic product processing, including a frame and a spray head installed on the inner side of the frame through a control platform:

[0008] The side end of the nozzle is provided with an expansion chamber connected to the inner side thereof, and the inner side of the expansion chamber is provided with an elastic movable component;

[0009] A pre-spraying mechanism is provided on the lower side of the spray head, and the pre-spraying mechanism includes a transmission rod and a pre-spraying plate;

[0010] The pre-spraying plate is located at the lower side of the spraying nozzle of the spray head, and the pre-spraying plate is connected with the elastic movable component through a transmission rod.

[0011] In the above-mentioned spraying device based on plastic product processing, through the coordinated arrangement of the expansion bin, the elastic movable component, the transmission rod and the pre-sprayed plate, when the nozzle spraying starts working, the sprayed paint is sprayed on the upper surface of the pre-sprayed plate, and in the early spraying process, the paint on the inside of the nozzle squeezes the elastic movable component, causing the elastic movable component to move toward the side away from the nozzle, thereby moving the pre-sprayed plate toward the side of the spray nozzle away from the nozzle through the transmission rod, until the pre-sprayed plate can no longer completely receive the sprayed paint, the early spraying is completed, and the automatic removal of the early sprayed paint is achieved.

[0012] As a further supplement to the present application, the elastic movable component includes a sealing slider 1, a sealing slider 2, a reset member 1 and a guide slide rod 1;

[0013] A partition layer is integrated in the middle of the inner side of the expansion chamber, and a damping hole is arranged on the partition layer. The sealing slider 1 and the sealing slider 2 are respectively located on both sides of the partition layer, and the sealing slider 2 is located on the side of the partition layer away from the nozzle;

[0014] The sealing slider 1 and the sealing slider 2 are both horizontally slidably installed on the inner side of the expansion bin, one end of the guide slide bar 1 is vertically fixed to the end of the sealing slider 1 close to the partition layer, and the other end of the guide slide bar 1 slides through the partition layer, the sealing slider 2 and the expansion bin in sequence, and is fixed to the transmission rod through the cross frame;

[0015] The reset member 1 is horizontally fixed between the sealing slider 2 and the expansion chamber, and the inner side of the cavity formed by the sealing slider 2, the sealing slider 1 and the expansion chamber is filled with fluid; before spraying, the sealing slider 2 squeezes the fluid under the elastic action of the reset member 1, so that the fluid is located between the isolation layer and the sealing slider 1; during spraying, the paint squeezes the sealing slider 1 under the action of high pressure, and the sealing slider 1 squeezes the fluid into the space between the isolation layer and the sealing slider 2 through the damping hole. At the same time, the sealing slider 1 moves toward the side away from the nozzle through the guide slide rod 1 with the cross frame and the transmission rod, and the transmission rod moves the pre-sprayed plate toward the side of the spray nozzle away from the nozzle, until the pre-sprayed plate can no longer completely receive the sprayed paint, the early spraying is completed, and the early sprayed paint is automatically removed.

[0016] As a further supplement to the present application, a gap is left between the pre-sprayed plate and the spray nozzle of the spray head.

[0017] As another improvement of the present application, a sealing plate is vertically elastically fixed to the upper end of the pre-spraying plate. When the nozzle is in a non-spraying state, the horizontal plane where the upper end surface of the sealing plate is located is consistent with the horizontal plane where the spray nozzle of the nozzle is located; before spraying, the sealing plate elastically contacts the spray nozzle of the nozzle to seal the spray nozzle to prevent external insects, dust, etc. from entering the inside of the spray nozzle; during spraying, the high-pressure paint squeezes the sealing plate downward.

[0018] As another improvement of the present application, the pre-sprayed plate comprises a fixed frame and a movable plate, the fixed frame is fixed to the transmission rod, and the movable plate is horizontally elastically connected to the inner side of the fixed frame;

[0019] The movable plate is elastically connected to the sealing plate vertically, the end of the movable plate away from the transmission rod is made of ferromagnetic material, and the side end of the nozzle away from the transmission rod is installed with a magnetic block through a fixed frame; in the early stage of spraying, the transmission rod moves horizontally with the fixed frame toward the side of the spray nozzle away from the nozzle, and the movable plate is stably located on the lower side of the nozzle with the sealing plate under the suction force of the magnetic block, ensuring stable reception of paint in the early stage of spraying.

[0020] As another improvement supplement of the present application, a reset member 2 is fixed between the movable plate and the sealing plate, and a limiting slide rod is vertically fixed to the bottom end of the sealing plate, and the limiting slide rod slides from top to bottom and passes through the movable plate.

[0021] As another improvement supplement to the present application, a reset piece three is fixed between the movable plate and the fixed frame, and a guide slide bar two is horizontally fixed to the side end of the fixed frame, and the guide slide bar two slides horizontally and penetrates the movable plate; in the early stage of spraying, during the translation process of the transmission rod with the fixed frame toward the side of the spray nozzle away from the nozzle, the movable plate is stably located at the lower side of the nozzle with the sealing plate under the suction force of the magnetic block, ensuring stable reception of the paint in the early stage of spraying, when the pulling force of the fixed frame away from the movable plate to the reset piece three on the movable plate is greater than the suction force between the movable plate and the magnetic block, the movable plate quickly moves toward the side of the fixed frame with the sealing plate, and then normal spraying can be carried out.

[0022] As a further improvement supplement of the present application, an anti-overflow enclosure is installed at the upper end of the sealing plate, and a gap is left on the side of the anti-overflow enclosure away from the transmission rod.

[0023] As another improvement supplement of the present application, a scraper is installed on the side end of the nozzle close to the transmission rod, and the horizontal plane where the lower end of the scraper is located is consistent with the horizontal plane where the spray nozzle of the nozzle is located; after the spraying is completed, the sealing plate can be moved horizontally and slid toward one side of the nozzle to reset during the process, so as to prevent the paint on the sealing plate from adhering to the nozzle and causing adverse effects on the spraying.

[0024] In summary, through the coordinated arrangement of the expansion bin, the elastic movable component, the transmission rod and the pre-spraying plate, before spraying, the sealing slider 2 squeezes the fluid under the elastic action of the reset member 1, so that the fluid is located between the partition layer and the sealing slider 1, and the sealing plate elastically contacts the spray nozzle of the nozzle to seal the spray nozzle to prevent external insects, dust, etc. from entering the inside of the spray nozzle; during spraying, the high-pressure paint squeezes the sealing plate downward, and the paint squeezes the sealing slider 1 under the action of high pressure, and the sealing slider 1 squeezes the fluid into between the partition layer and the sealing slider 2 through the damping hole. At the same time, the sealing slider 1 moves toward the side away from the nozzle through the guide slide rod 1 with the cross frame and the transmission rod, and the transmission rod moves the pre-spraying plate toward the side of the spray nozzle away from the nozzle until the pre-spraying plate cannot completely receive the sprayed paint, and the early spraying is completed, thereby realizing the automatic removal of the early sprayed paint.

[0025] In addition, in the early stage of spraying, when the transmission rod moves the fixed frame toward the side of the spray nozzle away from the nozzle, the movable plate is stably located with the sealing plate under the suction of the magnetic block, ensuring stable reception of the paint in the early stage of spraying. When the pulling force of the three pairs of movable plates from the fixed frame to the reset part is greater than the suction between the movable plate and the magnetic block, the movable plate quickly moves with the sealing plate toward one side of the fixed frame, and then normal spraying can be carried out. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall three-dimensional structure of a specific implementation method of the present application;

[0027] Figure 2 This is a schematic diagram of the three-dimensional structure of the nozzle of a specific embodiment of the present application;

[0028] Figure 3 This is a schematic diagram of the cross-section structure of an expansion bin according to a specific implementation of the present application;

[0029] Figure 4 A schematic diagram of the three-dimensional structure of a pre-spraying mechanism according to a specific embodiment of the present application;

[0030] Figure 5 It is a schematic diagram of the three-dimensional structure of the pre-sprayed plate and the sealing plate of the specific embodiment of the present application;

[0031] Figure 6 for Figure 5 A schematic diagram of the three-dimensional structure of the sealing plate in a pressed state;

[0032] Figure 7 for Figure 5 Schematic diagram of the split three-dimensional structure;

[0033] Figure 8 This is a state diagram of the pre-spraying mechanism of a specific embodiment of the present application before spraying;

[0034] Fig. 9 A state diagram of the pre-spraying mechanism in the early spraying process according to a specific embodiment of the present application;

[0035] Fig.10 This is a state diagram of the pre-spraying mechanism of a specific embodiment of the present application during a normal spraying process.

[0036] Description of the numbers in the figure:

[0037] 1. Rack; 2. Control pan / tilt; 3. Nozzle; 31. Expansion bin; 32. Partition layer; 3201. Damping hole; 33. Sealing slider 1; 34. Sealing slider 2; 35. Reset part 1; 36. Guide slide bar 1; 37. Cross frame; 4. Pre-spraying mechanism; 41. Transmission rod; 42. Pre-spraying plate; 421. Fixed frame; 422. Movable plate; 423. Guide slide bar 2; 424. Reset part 3; 43. Sealing plate; 431. Overflow prevention enclosure; 44. Limiting slide bar; 45. Reset part 2; 5. Fixed frame; 6. Magnetic block; 7. Scraper. DETAILED DESCRIPTION

[0038] The following is a detailed description of three implementation methods of the present application in conjunction with the accompanying drawings.

[0039] The first implementation method:

[0040] The present invention provides a spraying device based on plastic product processing, please refer to Figure 1-4, including a frame 1 and a nozzle 3 installed on the inner side of the frame 1 through a control pan / tilt 2, the side end of the nozzle 3 is provided with an expansion chamber 31 connected with the inner side thereof, the inner side of the expansion chamber 31 is provided with an elastic movable component, the lower side of the nozzle 3 is provided with a pre-spraying mechanism 4, the pre-spraying mechanism 4 includes a transmission rod 41 and a pre-spraying plate 42, the pre-spraying plate 42 is located at the lower side of the spray nozzle of the nozzle 3, and the pre-spraying plate 42 is connected to the elastic movable component through the transmission rod 41.

[0041] The spraying device is configured by the cooperation of the expansion bin 31, the elastic movable component, the transmission rod 41 and the pre-spraying plate 42. When the nozzle 3 starts to spray, the sprayed paint is sprayed on the upper surface of the pre-spraying plate 42. In the early spraying process, the paint on the inner side of the nozzle 3 squeezes the elastic movable component, causing the elastic movable component to move toward the side away from the nozzle 3, thereby moving the pre-spraying plate 42 toward the side of the spray nozzle away from the nozzle 3 through the transmission rod 41, until the pre-spraying plate 42 can no longer completely receive the sprayed paint, the early spraying is completed, and the early sprayed paint is automatically removed.

[0042] Among them, regarding the elastic activity components, specifically, Figure 1 , Figure 2 and Figure 3 As shown, the elastic movable component includes a sealing slider 1 33, a sealing slider 2 34, a reset piece 1 35 and a guide slide rod 1 36. A partition layer 32 is integrated in the middle of the inner side of the expansion chamber 31, and a damping hole 3201 is arranged on the partition layer 32. The sealing slider 1 33 and the sealing slider 2 34 are respectively located on both sides of the partition layer 32, and the sealing slider 2 34 is located on the side of the partition layer 32 away from the nozzle 3. The sealing slider 1 33 and the sealing slider 2 34 are both horizontally slidably installed on the inner side of the expansion chamber 31. One end of the guide slide rod 1 36 is vertically fixed to the end of the sealing slider 1 33 close to the partition layer 32, and the other end of the guide slide rod 1 36 slides through the partition layer 32, the sealing slider 2 34 and the expansion chamber 31 in turn, and is fixed to the transmission rod 41 through a cross frame 37. The reset piece 1 35 is horizontally fixed between the sealing slider 2 34 and the expansion chamber 31, and the inner side of the cavity formed by the sealing slider 2 34, the sealing slider 1 33 and the expansion chamber 31 is filled with fluid.

[0043] Before spraying, the sealing slider 2 34 squeezes the fluid under the elastic action of the reset piece 1 35, so that the fluid is located between the isolation layer 32 and the sealing slider 1 33; during spraying, the paint squeezes the sealing slider 1 33 under the action of high pressure, and the sealing slider 1 33 squeezes the fluid into the space between the isolation layer 32 and the sealing slider 2 34 through the damping hole 3201. At the same time, the sealing slider 1 33 moves toward the side away from the nozzle 3 through the guide slide bar 1 36 with the cross frame 37 and the transmission rod 41, and the transmission rod 41 moves with the pre-spraying plate 42 toward the side of the spray nozzle away from the nozzle 3, until the pre-spraying plate 42 can no longer completely receive the sprayed paint, the early spraying is completed, and the early sprayed paint is automatically removed.

[0044] There is a gap between the pre-spraying plate 42 and the spraying nozzle of the spray head 3 .

[0045] Second implementation method:

[0046] This embodiment is based on the embodiment 1, and the following structure is added, so that the present application has the function of sealing the spray nozzle of the spray head 3 in the non-spraying state, and the specific configuration is as follows: Figure 1 , Figure 2 and Figure 4 As shown, a sealing plate 43 is vertically elastically fixed to the upper end of the pre-spraying plate 42. When the nozzle 3 is in a non-spraying state, the horizontal plane where the upper end surface of the sealing plate 43 is located is consistent with the horizontal plane where the spray nozzle of the nozzle 3 is located; before spraying, the sealing plate 43 elastically contacts the spray nozzle of the nozzle 3 to seal the spray nozzle to prevent external insects, dust, etc. from entering the inside of the spray nozzle; during spraying, the high-pressure paint squeezes the sealing plate 43 downward.

[0047] A second reset member 45 is fixed between the pre-sprayed plate 42 and the sealing plate 43 , and a limiting slide bar 44 is vertically fixed to the bottom end of the sealing plate 43 , and the limiting slide bar 44 slides from top to bottom and penetrates the pre-sprayed plate 42 .

[0048] Before spraying, the sealing plate 43 elastically contacts the spray nozzle of the spray head 3 to seal the spray nozzle. Figure 8 As shown, external insects, dust, etc. are prevented from entering the inside of the spray nozzle; when spraying, the high-pressure paint presses the sealing plate 43 downward, as shown in FIG. Fig. 9 It is shown that it will not affect the normal spraying later.

[0049] The third implementation method:

[0050] On the basis of Embodiment 1 and Embodiment 2, this embodiment adds the following structure, so that the sealing plate 43 of the present application can stably receive the paint in the early stage of spraying, and the specific configuration is as follows: Figure 5-7As shown, as another improvement of the present application, the pre-spraying plate 42 includes a fixed frame 421 and a movable plate 422, the fixed frame 421 is fixed to the transmission rod 41, the movable plate 422 is horizontally elastically connected to the inner side of the fixed frame 421, the movable plate 422 is vertically elastically connected to the sealing plate 43, the end of the movable plate 422 away from the transmission rod 41 is made of ferromagnetic material, and the side end of the nozzle 3 away from the transmission rod 41 is installed with a magnetic suction block 6 through a fixed frame 5.

[0051] In the early stage of spraying, the transmission rod 41 moves with the fixed frame 421 toward the side of the spray nozzle away from the nozzle 3, and the movable plate 422 is stably located at the lower side of the nozzle 3 with the sealing plate 43 under the suction of the magnetic suction block 6. Fig. 9 It is shown that stable reception of paint in the early stage of spraying is guaranteed.

[0052] The second reset member 45 is fixed between the movable plate 422 and the sealing plate 43 , and the limiting sliding rod 44 slides from top to bottom and penetrates the movable plate 422 .

[0053] A third reset member 424 is fixed between the movable plate 422 and the fixed frame 421 , a second guide slide bar 423 is horizontally fixed to the side end of the fixed frame 421 , and the second guide slide bar 423 slides horizontally and penetrates the movable plate 422 .

[0054] In the early stage of spraying, the transmission rod 41 moves with the fixed frame 421 toward the side of the spray nozzle away from the nozzle 3, and the movable plate 422 is stably located at the lower side of the nozzle 3 with the sealing plate 43 under the suction of the magnetic suction block 6. Fig. 9 As shown, to ensure stable reception of the paint in the early stage of spraying, when the fixed frame 421 is away from the movable plate 422 until the pulling force of the reset member 424 on the movable plate 422 is greater than the suction force between the movable plate 422 and the magnetic suction block 6, the movable plate 422 quickly moves with the sealing plate 43 toward one side of the fixed frame 421, as shown in FIG. Fig.10 Shown, you can spray normally afterwards.

[0055] An anti-overflow enclosure 431 is installed at the upper end of the sealing plate 43 , and a gap is left on the side of the anti-overflow enclosure 431 away from the transmission rod 41 .

[0056] Among them, a scraper 7 is installed at the side end of the nozzle 3 close to the transmission rod 41, and the horizontal plane where the lower end of the scraper 7 is located is consistent with the horizontal plane where the spray nozzle of the nozzle 3 is located; after normal spraying is completed, during the process of the sealing plate 43 sliding and resetting toward one side of the nozzle 3, the scraper 7 can scrape off the paint on the upper surface of the sealing plate 43 to prevent the paint on the sealing plate 43 from adhering to the nozzle 3 and causing adverse effects on the subsequent normal spraying.

[0057] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A spraying device for processing plastic products, comprising a frame (1) and a spray head (3) mounted on the inner side of the frame (1) via a control platform (2), characterized in that: The side end of the nozzle (3) is provided with an expansion chamber (31) which is in communication with the inner side thereof, and the inner side of the expansion chamber (31) is provided with an elastic movable component; A pre-spraying mechanism (4) is provided on the lower side of the spray head (3), and the pre-spraying mechanism (4) comprises a transmission rod (41) and a pre-spraying plate (42); The pre-spraying plate (42) is located at a lower side of the spraying nozzle of the spray head (3), and the pre-spraying plate (42) is connected to the elastic movable component via the transmission rod (41); The elastic movable component comprises a sealing slider 1 (33), a sealing slider 2 (34), a reset member 1 (35) and a guide slide rod 1 (36); A partition layer (32) is integrally provided in the middle portion of the inner side of the expansion chamber (31); One end of the guide slide rod 1 (36) is vertically fixed to one end of the sealing slide rod 1 (33) close to the partition layer (32), and the other end of the guide slide rod 1 (36) slides through the partition layer (32), the sealing slide rod 2 (34) and the expansion chamber (31) in sequence, and is fixed to the transmission rod (41) through a cross frame (37); The first reset member (35) is horizontally fixed between the second sealing slide block (34) and the expansion chamber (31); The pre-spraying plate (42) comprises a fixed frame (421) and a movable plate (422), wherein the fixed frame (421) is fixed to the transmission rod (41), and the movable plate (422) is horizontally elastically connected to the inner side of the fixed frame (421); The end of the movable plate (422) away from the transmission rod (41) is made of ferromagnetic material, and the side end of the nozzle (3) away from the transmission rod (41) is mounted with a magnetic attraction block (6) via a fixing frame (5).

2. A spraying device based on plastic product processing according to claim 1, characterized in that: The barrier layer (32) is provided with a damping hole (3201), the sealing slider 1 (33) and the sealing slider 2 (34) are respectively located on two sides of the barrier layer (32), and the sealing slider 2 (34) is located on a side of the barrier layer (32) away from the nozzle (3); The sealing slide block 1 (33) and the sealing slide block 2 (34) are both horizontally slidably mounted on the inner side of the expansion bin (31); The inner side of the cavity formed by the sealing slider 2 (34), the sealing slider 1 (33) and the expansion chamber (31) is filled with fluid.

3. A spraying device based on plastic product processing according to claim 1, characterized in that: A gap is left between the pre-spraying plate (42) and the spraying nozzle of the spray head (3).

4. A spraying device based on plastic product processing according to claim 3, characterized in that: A sealing plate (43) is vertically elastically fixed to the upper end of the pre-spraying plate (42); when the spray head (3) is in a non-spraying state, the horizontal plane where the upper end surface of the sealing plate (43) is located is consistent with the horizontal plane where the spray nozzle of the spray head (3) is located.

5. A spraying device based on plastic product processing according to claim 4, characterized in that: The movable plate (422) is vertically elastically connected to the sealing plate (43).

6. A spraying device based on plastic product processing according to claim 5, characterized in that: A second reset member (45) is fixed between the movable plate (422) and the sealing plate (43), and a limiting slide bar (44) is vertically fixed to the bottom end of the sealing plate (43), and the limiting slide bar (44) slides from top to bottom and passes through the movable plate (422).

7. A spraying device based on plastic product processing according to claim 5, characterized in that: A third reset member (424) is fixed between the movable plate (422) and the fixed frame (421), and a second guide slide bar (423) is horizontally fixed to the side end of the fixed frame (421), and the second guide slide bar (423) slides horizontally and passes through the movable plate (422).

8. A spraying device based on plastic product processing according to claim 5, characterized in that: An anti-overflow enclosure (431) is installed at the upper end of the sealing plate (43), and a gap is left on a side of the anti-overflow enclosure (431) away from the transmission rod (41).

9. A spraying device based on plastic product processing according to claim 8, characterized in that: A scraper (7) is installed at the side end of the spray head (3) close to the transmission rod (41), and the horizontal plane where the lower end of the scraper (7) is located is consistent with the horizontal plane where the spray nozzle of the spray head (3) is located.

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