Pulp molding surface spraying system and spraying process

Abstract

The invention belongs to the technical field of spraying equipment, and mainly relates to a paper pulp molding surface spraying system and process, and the spraying system comprises a feeding mechanism used for conveying products; the spraying mechanism comprises a working cavity and a spraying head arranged on one side of the working cavity, a spraying platform used for fixing a product is horizontally and rotationally assembled in the working cavity, and the spraying head is used for spraying paint to the product; the drying mechanism is used for drying the sprayed product; the transverse moving manipulator enables the products to be transferred among the feeding mechanism, the spraying mechanism and the drying mechanism; and the receiving mechanism is used for receiving the dried products. A static visual angle blind area is broken through a dynamically rotating spraying platform, a transverse moving mechanical arm accurately transfers and maintains the posture of a product, and a drying link is matched with the drying characteristic of a coating, and the three-dimension synergistic effect of spraying process control, coating leveling assistance and follow-up process protection is achieved; and the problem of non-uniform spraying caused by complex structure, poor coating flowability and much manual intervention of the product is systematically solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of spraying equipment, and mainly relates to a surface spraying system and spraying process for pulp molding. Background Art

[0002] Pulp molding is a three-dimensional papermaking technology that uses plant fibers as raw materials and shapes paper products of a certain shape through special molds on a molding machine. In order to improve the performance of pulp molding or add special functions to pulp molding, corresponding coatings need to be sprayed on the pulp molding. The spraying of pulp molding is a key link for it to be upgraded from a "fiber product" to a "functional product". By targeted selection of coating materials, the application scenarios can be significantly expanded, and at the same time, environmental protection, performance, and cost can be balanced.

[0003] The patent application document with publication number CN112058567A discloses a surface spraying device for pulp molding products. The spraying device includes a workbench, a support frame, a spraying cabinet, a control cabinet, and a drying oven. The left end of the workbench is provided with a loading end, the right end of the workbench is provided with a receiving end, the bottom of the workbench is installed with a support frame, and a reinforcing frame is welded between the support frame and the bottom of the workbench. A spraying cabinet is arranged to the right of the loading end, a control cabinet is arranged to the right of the spraying cabinet, a drying oven is arranged to the right of the control cabinet, and the drying oven is located to the left of the receiving end. A stainless steel chain plate is installed on the workbench. When in use, the product moves towards the receiving end along with the stainless steel chain plate. When the product moves through the spraying cabinet, the spraying mechanism in the spraying cabinet sprays a layer of coating on the product. At the same time, the water curtain in the spraying cabinet washes and filters the spraying agent that has not adhered to the surface of the product, and then the product enters the drying oven for drying.

[0004] When the above spraying device sprays products, since it directly sprays the products with a spray head without subsequent treatment, there will be a problem of uneven spraying, thus affecting the quality of the products. Summary of the Invention

[0005] The present invention provides a surface spraying system and spraying process for pulp molding to solve the problem of uneven spraying of pulp molding products in the prior art.

[0006] To solve the above problems, the present invention adopts the following technical solutions: A surface spraying system for pulp molding, comprising: A loading mechanism for conveying products; A spraying mechanism, which includes a working chamber and a spray head arranged on one side of the working chamber. A spraying platform for fixing products is horizontally and rotatably assembled in the working chamber. The spray head is used to spray coating on the products on the spraying platform, and the spraying platform rotates to make the coating on the products flow to the unsprayed positions; A drying mechanism for drying the sprayed products; The transverse manipulator is used to grab the product and transfer the product between the feeding mechanism, the spraying mechanism and the drying mechanism; The material receiving mechanism is used to receive the dried products.

[0007] It has the following beneficial effects: the dynamic rotating spray platform breaks the static visual blind spot, the lateral movement robot accurately transfers and maintains the product posture, and the drying process matches the drying characteristics of the paint. The three dimensions of spraying process control, paint leveling assistance, and subsequent process protection work together to systematically solve the problem of uneven spraying caused by complex structure, poor paint fluidity, and frequent manual intervention.

[0008] Furthermore, the spraying mechanism comprises a bracket and a cavity provided on the bracket, the working chamber is provided in the cavity, and the spray head is provided on the cavity; The bracket is provided with a driving assembly, which is transmission-connected with the spraying platform to drive the spraying platform to rotate.

[0009] Furthermore, a linear drive is provided on the cavity, the linear drive is connected to the nozzle, and the linear drive operates to change the angle of the nozzle toward the product.

[0010] The following beneficial effects are achieved: the addition of a linear drive and an adjustable angle nozzle upgrades the spraying mechanism from "fixed viewing angle coverage" to "dynamic viewing angle tracking"; Through dynamic angle adjustment, the nozzle's "line of sight" is always perpendicular to the normal vector of the complex surface of the product, ensuring that each micro-area receives an equal amount of paint impact; Decoupling parameters such as angle, rotation speed, and pressure to provide diversified process combinations for different coatings (water-based / oil-based) and different structural products; It lays the hardware foundation for the subsequent integration of advanced technologies such as AI vision guidance and adaptive spraying, and promotes the upgrade of pulp molding spraying to "unmanned precision manufacturing".

[0011] Furthermore, an annular baffle arranged around the spraying platform is provided in the working chamber, and the annular baffle is used to block the paint splashed when the spraying platform rotates; The cavity body is provided with a discharge pipe connected to the working cavity, and the discharge pipe is used to discharge the paint in the working cavity.

[0012] It has the following beneficial effects: The design of the annular baffle and the discharge pipe upgrades the spraying system from "open pollution" to "closed-loop controllable system"; Through physical isolation and directional recycling, paint loss, dust pollution and VOCs emissions are controlled at the industry-leading level; Dynamic waste liquid management ensures the stability of the spraying process and meets the precision coating requirements of high value-added products; The paint recycling feature significantly reduces material costs and downtime losses, making it particularly suitable for cost-sensitive large-scale production scenarios.

[0013] Furthermore, the feeding mechanism includes a feeding unit and a conveying unit. The feeding unit is used to transfer products onto the conveying unit, and the conveying unit is used to transport products. The feeding unit includes a support frame and a silo hinged to the support frame. The silo is used to place products, and a support assembly connecting the silo is provided on the support frame. The support assembly operates to change the inclination angle of the silo. A rotating shaft is provided on the support frame. A mounting member is rotatably assembled on the rotating shaft. An auxiliary guide rod is rotatably assembled on the support frame. The auxiliary guide rod slidably passes through the mounting member. A suction cup is provided on the mounting member. The rotating shaft rotates to make the mounting member revolve around the rotating shaft and rotate self - rotatably under the guidance of the auxiliary guide rod to adsorb the products in the silo. The rotating shaft rotates in the reverse direction to place the adsorbed products on the conveying unit.

[0014] It has the following beneficial effects: The inclination angle of the silo can be adapted to different specifications of pulp molding products, enabling the products to be naturally laid flat under the action of gravity. The revolution of the mounting member (rotation around the rotating shaft) realizes the full - area coverage of the products in the silo. The self - rotation of the mounting member (guided by the auxiliary guide rod) makes the suction cup automatically adjust its posture when approaching the product, ensuring that the adsorption surface is perpendicular to the product surface and stably sucking the product.

[0015] Furthermore, a clamping member is movably assembled on the silo. The clamping member is used to clamp the products in the silo one by one, so that the suction cup only adsorbs one product each time.

[0016] It has the following beneficial effects: The action of the clamping member is synchronized with the revolution / self - rotation period of the suction cup, ensuring that the suction cup only adsorbs one product each time. Through the design of physical isolation + dynamic linkage, the clamping member solves the most prone problems of "stacked material adsorption" and "unstable feeding" in the feeding process of pulp molding, avoids direct quality problems caused by simultaneously picking multiple products, and more importantly, through precise single - piece control, it lays a foundation for the uniformity (such as the precise matching of nozzle angle and spraying time) and drying efficiency (single - piece flat drying) of the subsequent spraying process.

[0017] Furthermore, the transverse manipulator has two stations. One station is used to transfer the products on the conveying unit to the spraying platform, and the other station is used to transfer the products on the spraying platform to the drying mechanism.

[0018] It has the following beneficial effects: The transverse transfer manipulator adopts a dual-station independent drive structure (such as a dual linear module + servo motor). While one station grabs the product to be sprayed from the conveying unit, the other station transfers the sprayed product from the spraying platform to the drying mechanism. The time for synchronous picking and placing of materials is compressed, the process rhythm is optimized, ensuring that the spraying mechanism is always in a full-load operation state, and avoiding the waiting time of the spraying platform caused by the time-consuming picking and placing of materials in the traditional single station.

[0019] Further, the material receiving mechanism includes a frame. Two moving parts arranged at intervals are slidably provided on the frame. The two moving parts can slide relative to each other. First conveying parts are provided on both of the two moving parts, and the two first conveying parts transport products simultaneously; A lifting part is movably provided in the up-and-down direction of the frame. The lifting part passes through the middle of the two first conveying parts and presses the products on the two first conveying parts. The two moving parts move relative to each other to make the two first conveying parts move away from each other, so that the lifting part supports the products; Two second conveying parts arranged at intervals are provided on the frame. The second conveying parts are located below the first conveying parts. The lifting part passes through the middle of the two second conveying parts and presses the products. The lifting part descends, so that the products supported by the lifting part fall onto the two second conveying parts, and the two second conveying parts transport the products to the material receiving station.

[0020] Further, a gear rotatable around the vertical direction is provided on the frame. Rack bars are engaged on both opposite sides of the gear. The gear rotates to make the two rack bars move relative to each other, and the two rack bars are respectively connected to the moving parts on the corresponding sides to drive the two moving parts to move.

[0021] A pulp molding surface spraying process, applied to the pulp molding surface spraying system described above, includes the following steps: Step 1: Place a plurality of products on the feeding mechanism in sequence, and the transverse transfer manipulator grabs the products onto the spraying platform in the spraying mechanism; Step 2: The nozzle sprays the coating towards the products. At the same time, the spraying platform rotates to evenly disperse the coating to each position of the products and remove the excess coating on the products; Step 3: The transverse transfer manipulator grabs the products on the spraying platform and moves them to the drying mechanism, and the drying mechanism dries the products; Step 4: The dried products move to the material receiving mechanism, and the material receiving mechanism sequentially collects the products.

[0022] It has the following beneficial effects: Through the triple mechanisms of the dynamically rotating spraying platform to break the static visual blind area, the precise transfer of the transverse transfer manipulator to maintain the product posture, and the drying link to match the drying characteristics of the coating, it synergistically acts from three dimensions of spraying process control, coating leveling assistance, and subsequent process protection, and systematically solves the problem of uneven spraying of products caused by complex structure, poor coating fluidity, and many manual interventions. Brief Description of the Drawings

[0023] Figure 1 is a schematic structural view of the present invention; Figure 2 is a schematic structural view of the feeding unit from the first perspective; Figure 3 is a schematic structural view of the feeding unit from the second perspective; Figure 4 is Figure 2 an enlarged view of part A in Figure 5 is Figure 3 an enlarged view of part B in Figure 6 is Figure 3 an enlarged view of part C in Figure 7 is a schematic structural view of the conveying unit; Figure 8 is a schematic structural view of the spraying mechanism; Figure 9 is Figure 8 an enlarged view of part D in Figure 10 is a top view of the spraying mechanism; Figure 11 is Figure 10 a cross-sectional view taken along the E-E direction in Figure 12 is a schematic structural view of the transverse manipulator; Figure 13 is a schematic structural view of the material receiving unit from the first perspective; Figure 14 is a schematic structural view of the material receiving unit from the second perspective; Figure 15 is a schematic structural view of the material receiving unit from the third perspective; Figure 16 is Figure 14 an enlarged view of part F in

[0024] Description of the Reference Numerals: 1. Loading mechanism; 2. Spraying mechanism; 3. Drying mechanism; 4. Transverse manipulator; 5. Unloading mechanism; 6. Feeding unit; 7. Conveying unit; 8. Product; 9. Support frame; 10. Bin; 11. Mounting seat; 12. Support plate; 13. Arc-shaped hole; 14. Sliding groove; 15. Rotating shaft; 16. Connecting plate; 17. Mounting part; 18. Auxiliary guide rod; 19. Clamping part; 20. Clamping cylinder; 21. Bracket; 22. Working chamber; 23. Nozzle; 24. Annular partition; 25. Cavity; 26. Spraying platform; 27. Linear driving part; 28. Oscillating part; 29. Frame; 30. Moving part; 31. First conveying part; 32. Second conveying part; 33. Moving cylinder; 34. Lifting part; 35. Gear; 36. Rack. Detailed implementation

[0025] As Figure 1 shown, a pulp molding surface spraying system includes a loading mechanism 1, a spraying mechanism 2, a drying mechanism 3, a transverse manipulator 4, and an unloading mechanism 5. Among them, the loading mechanism 1 is used to convey the product 8 (pulp molding). The spraying mechanism 2 is used to spray paint on the product 8. The drying mechanism 3 is used to dry the product 8 after spraying the paint. In this embodiment, the drying mechanism 3 is a prior art (as Figure 12 shown), and a tunnel dryer can be used. The transverse manipulator 4 is used to grab the product 8 and transfer the product 8 between the loading mechanism 1, the spraying mechanism 2, and the drying mechanism 3. The unloading mechanism 5 is used to collect the dried product 8. The spraying of the product 8 is completed through the above equipment.

[0026] As Figures 2 - 6 shown, in this embodiment, the loading mechanism 1 includes a feeding unit 6 and a conveying unit 7. The feeding unit 6 is used to transfer the product 8 to the conveying unit 7, and the conveying unit 7 is used to transport the product 8. In this embodiment, as Figure 7 shown, the conveying unit 7 is a chain conveyor. The chain conveyor is a prior art and will not be described in detail in this implementation.

[0027] In other embodiments, the conveying unit 7 is a belt conveyor.

[0028] The feeding unit 6 includes a support frame 9 and a bin 10 hinged to the support frame 9. The bin 10 is used to place the product 8. A support assembly for connecting the bin 10 is provided on the support frame 9, and the support assembly operates to change the inclination angle of the bin 10. The support assembly includes a mounting seat 11 fixedly assembled on the support frame 9 and a support plate 12 hinged to the mounting seat 11. An arc-shaped hole 13 is provided on the mounting seat 11, and a first sliding pin is provided at one end of the support plate 12. The first sliding pin is located and slides within the arc-shaped hole 13. A sliding groove 14 is provided on the bin 10, and a second sliding pin is provided at the other end of the support plate 12. The second sliding pin is located and slides within the sliding groove 14. By the sliding of the first sliding pin within the arc-shaped hole 13 and the sliding of the second sliding pin within the sliding groove 14, the placement angle of the bin 10 on the support frame 9 is adjusted.

[0029] In this embodiment, the first sliding pin has a thread. When the bin 10 is adjusted to a suitable angle, a nut is connected to the first sliding pin through the thread, thereby locking one end of the support plate 12 on the mounting seat 11, and further ensuring the stability of the placement angle of the bin 10. Similarly, a thread can also be provided on the second sliding pin to achieve the fixation between the support plate 12 and the bin 10.

[0030] In this embodiment, as Figure 4 shown, a rotating shaft 15 is provided on the support frame 9, and the rotating shaft 15 is driven by a motor installed on the support frame 9. Two connecting plates 16 are fixed on the rotating shaft 15, and a mounting member 17 is rotatably assembled between the two connecting plates 16. An auxiliary guide rod 18 is provided on the support frame 9. The auxiliary guide rod 18 is in a right-angled shape. One side of the auxiliary guide rod 18 slides through the mounting member 17, and the other side of the auxiliary guide rod 18 is rotatably assembled on the support frame 9. A suction cup is provided on the mounting member 17. The motor drives the rotating shaft 15 to rotate so that the mounting member 17 revolves around the rotating shaft 15, and under the guiding action of the auxiliary guide rod 18, it rotates towards the product 8 in the bin 10, and the product 8 in the bin 10 is adsorbed by the suction cup. Then the rotating shaft 15 rotates in the reverse direction to place the adsorbed product 8 on the conveying unit 7.

[0031] The inclination angle of the bin 10 can be adapted to different specifications of pulp molded products 8, enabling the products 8 to be naturally laid flat under the action of gravity and avoiding stacking and adhesion. The revolution of the mounting member 17 (rotating around the rotating shaft 15) realizes the full-area coverage of the products 8 in the bin 10. The self-rotation of the mounting member 17 (guided by the auxiliary guide rod 18) enables the suction cup to automatically adjust its posture when approaching the product 8, ensuring that the adsorption surface is perpendicular to the surface of the product 8 and stably sucking the product 8.

[0032] Two clamping cylinders 20 are arranged at intervals on the silo 10. Clamping members 19 are assembled on both of the two clamping cylinders 20. The two clamping cylinders 20 alternately drive the corresponding clamping members 19 to move, so that the suction cup adsorbs only one product 8 each time, and other products 8 will not fall out of the silo 10. The movement of the clamping member 19 is synchronized with the revolution / rotation period of the suction cup, ensuring that the suction cup adsorbs only one product 8 each time. Through the design of physical isolation + dynamic linkage, the clamping member 19 solves the most easily occurring problems of "stacked material adsorption" and "unstable feeding" in the feeding process of pulp molding, avoids direct quality problems caused by simultaneous picking of multiple products 8, and more importantly, through precise single-piece control, it lays a foundation for the uniformity of the subsequent spraying process (such as the precise matching of the angle of the spray head 23 and the spraying time) and the drying efficiency (single-piece flat drying).

[0033] As Figures 8 - 11 shown, in this embodiment, the spraying mechanism 2 includes a bracket 21 and a cavity 25 provided on the bracket 21. A working chamber 22 is provided in the cavity 25. A spray head 23 is provided on the cavity 25, and the pressure during spraying of the spray head 23 can be determined according to actual conditions. A spraying platform 26 for fixing the product 8 is horizontally rotatably assembled in the working chamber 22. The spray head 23 is used to spray the product 8 on the spraying platform 26 with paint, and the spraying platform 26 rotates to make the paint on the product 8 flow to the unsprayed position. A driving component is provided on the bracket 21, and the driving component is in transmission connection with the spraying platform 26 to drive the spraying platform 26 to rotate. A linear driving member 27 is provided on the cavity 25. A swinging member 28 is hinged on the cavity 25. One end of the swinging member 28 is connected to the linear driving member 27, and the other end of the swinging member 28 is connected to the spray head 23. The linear driving member 27 operates to change the angle of the spray head 23 facing the product 8.

[0034] In this embodiment, the linear driving member 27 is a driving cylinder.

[0035] In other embodiments, the linear driving member 27 is an electric push rod or a hydraulic cylinder.

[0036] The addition of the linear driving member 27 and the spray head 23 with adjustable angle upgrades the spraying mechanism 2 from "fixed perspective coverage" to "dynamic perspective tracking". Through dynamic angle adjustment, the "line of sight" of the spray head 23 is always perpendicular to the normal vector of the complex surface of the product 8, ensuring that each micro-region receives an equal amount of paint impact. Decoupling parameters such as the angle of the spray head 23, the rotation speed of the spraying platform 26, and the pressure of the spray head 23 provides diversified process combinations for different paints (water-based / oil-based) and products 8 with different structures. At the same time, it can also lay a hardware foundation for subsequent integration of advanced technologies such as AI vision guidance and adaptive spraying, and promote the upgrade of pulp molding spraying to "unmanned precision manufacturing".

[0037] In this embodiment, an annular partition 24 is provided in the working chamber 22 and is arranged around the spraying platform 26. The annular partition 24 is used to prevent the paint splashed when the spraying platform 26 rotates from flying towards the wall of the working chamber 22. A discharge pipe communicating with the working chamber 22 is provided on the cavity 25. The discharge pipe is used to discharge the paint in the working chamber 22, and a recovery device can be used to recover the discharged paint. The design of the annular partition 24 and the discharge pipe upgrades the spraying system from an "open-type pollution" to a "closed-loop controllable system". Through physical isolation and directional recovery, the paint loss, dust pollution, and VOCs emissions are controlled at the leading level in the industry. The dynamic waste liquid management ensures the stability of the spraying process and adapts to the precise coating requirements of high-value-added products 8. The paint recycling characteristic significantly reduces the material cost and downtime loss, and is especially suitable for cost-sensitive large-scale production scenarios.

[0038] In this embodiment, the transverse manipulator 4 has two workstations. One workstation is used to transfer the product 8 on the conveying unit 7 to the spraying platform 26, and the other workstation is used to transfer the product 8 on the spraying platform 26 to the drying mechanism 3. The transverse manipulator 4 adopts a double-workstation independent drive structure (such as a double linear module + servo motor). While one workstation grabs the product 8 to be sprayed from the conveying unit 7, the other workstation transfers the sprayed product 8 from the spraying platform 26 to the drying mechanism 3. The time for synchronous picking and placing of materials is compressed, the process rhythm is optimized, ensuring that the spraying mechanism 2 is always in a full-load operation state, and avoiding the waiting time of the spraying platform 26 caused by the time-consuming picking and placing of materials in the traditional single workstation.

[0039] As Figures 13 - 16 shown, in this embodiment, the receiving mechanism 5 includes a frame 29. Two moving members 30 arranged at intervals are slidably provided on the frame 29. The two moving members 30 can slide relative to each other. A first conveying member 31 is provided on each of the two moving members 30. The two first conveying members 31 transport the product 8 at the same time. The direction in which the first conveying member 31 transports the product 8 is perpendicular to the moving direction of the moving member 30.

[0040] In this embodiment, the first conveying member 31 is a belt conveyor.

[0041] In other embodiments, the first conveying member 31 is a chain conveyor.

[0042] A lifting member 34 is movably provided in the up-and-down direction of the frame 29. The lifting member 34 is driven by a motor installed on the frame 29 to lift in the up-and-down direction. The lifting member 34 passes through the middle of the two first conveying members 31 and presses against the product 8 on the two first conveying members 31. The two moving members 30 move relative to each other to move the two first conveying members 31 away from each other, so that the lifting member 34 supports the product 8.

[0043] There are two second conveying members 32 arranged at intervals on the frame 29. The direction in which the second conveying member 32 conveys the product 8 is the same as the direction in which the first conveying member 31 conveys the product 8. The second conveying member 32 is located below the first conveying member 31. The lifting member 34 passes through the middle of the two second conveying members 32 and presses against the product 8 on the first conveying member 31. After the product 8 on the first conveying member 31 falls onto the lifting member 34, the lifting member 34 descends so that the product 8 supported by the lifting member 34 falls onto the two second conveying members 32, and the two second conveying members 32 transport the product 8 to the receiving station.

[0044] As Figure 16 shown, a gear 35 that rotates around the vertical direction is provided on the frame 29. Both opposite sides of the gear 35 are engaged with racks 36. The extending directions of the two racks 36 are the same. The rotation of the gear 35 causes the two racks 36 to move relative to each other. The two racks 36 are respectively connected to the moving members 30 on the corresponding sides to drive the two moving members 30 to move.

[0045] In this embodiment, a moving cylinder 33 is provided on the frame 29. The moving cylinder 33 is connected to one of the racks 36. The moving cylinder 33 drives the rack 36 to move. Through the engagement of the gear 35, the other rack 36 is driven to move, thereby realizing the relative movement of the two moving members 30.

[0046] In other embodiments, the gear 35 can be connected to a motor, and the gear 35 is driven to rotate by the motor.

[0047] In this embodiment, through the triple mechanisms of the dynamically rotating spraying platform 26 to break the static visual blind area, the horizontal transfer manipulator 4 to precisely transfer and maintain the posture of the product 8, and the drying link to match the drying characteristics of the paint, it acts synergistically from three dimensions of spraying process control, paint leveling assistance, and subsequent process protection, and systematically solves the problem of uneven spraying of the product 8 caused by complex structure, poor paint fluidity, and multiple manual interventions.

[0048] A pulp molding surface spraying process is applied to a pulp molding surface spraying system, including the following steps: Step 1: Place a plurality of products 8 in the material bin 10 of the loading mechanism 1 in sequence, and the horizontal transfer manipulator 4 grabs the product 8 and places it on the spraying platform 26 in the spraying mechanism 2; Step 2: The nozzle 23 sprays paint towards the product 8. At the same time, the spraying platform 26 rotates to evenly disperse the paint to each position of the product 8 and can also remove the excess paint on the product 8; Step 3: The horizontal transfer manipulator 4 grabs the product 8 on the spraying platform 26 and moves it to the drying mechanism 3, and the drying mechanism 3 dries the product 8; Step 4: The dried product 8 moves to the receiving mechanism 5, and the receiving mechanism 5 sequentially collects the product 8.

[0049] Through a triple mechanism of breaking the static perspective blind area by a dynamically rotating spraying platform 26, precisely transferring by a transverse moving manipulator 4 to maintain the posture of the product 8, and matching the drying characteristics of the coating in the drying link, it synergistically acts from three dimensions of spraying process control, coating leveling assistance, and subsequent process protection, and systematically solves the problem of uneven spraying of the pulp molding product 8 caused by its complex structure, poor coating fluidity, and excessive manual intervention.

Claims

1. A pulp molding surface spraying system, characterized in that, include: A feeding mechanism for conveying products; The spraying mechanism includes a working chamber and a spray head disposed on one side of the working chamber. A spraying platform for fixing the product is installed in the working chamber and rotates horizontally. The spray head is used to spray the paint on the product on the spraying platform. The spraying platform rotates to make the paint on the product flow to the unsprayed position. Drying mechanism, used to dry the product after spraying; The transverse manipulator is used to grab the product and transfer the product between the feeding mechanism, the spraying mechanism and the drying mechanism; The material receiving mechanism is used to receive the dried products.

2. The pulp molding surface spraying system according to claim 1, wherein The spraying mechanism comprises a bracket and a cavity arranged on the bracket, the working cavity is arranged in the cavity, and the spray head is arranged on the cavity; The bracket is provided with a driving assembly, which is transmission-connected with the spraying platform to drive the spraying platform to rotate.

3. The pulp molding surface spraying system according to claim 2, wherein The cavity is provided with a linear drive component, which is connected to the nozzle. The linear drive component operates to change the angle of the nozzle toward the product.

4. The pulp molding surface spraying system according to claim 2, wherein, An annular baffle arranged around the spraying platform is provided in the working chamber, and the annular baffle is used to block the paint splashed when the spraying platform rotates; The cavity body is provided with a discharge pipe connected to the working cavity, and the discharge pipe is used to discharge the paint in the working cavity.

5. The pulp molding surface spraying system according to claim 1, characterized in that, The feeding mechanism comprises a feeding unit and a conveying unit, wherein the feeding unit is used to transfer the product to the conveying unit, and the conveying unit is used to transport the product; The feeding unit includes a support frame and a silo hinged on the support frame, the silo is used to place the product, and a support assembly connected to the silo is provided on the support frame, and the support assembly operates to change the inclination angle of the silo; A rotating shaft is provided on the support frame, a mounting piece is rotatably mounted on the rotating shaft, an auxiliary guide rod is rotatably mounted on the support frame, the auxiliary guide rod slides through the mounting piece, a suction cup is provided on the mounting piece, the rotating shaft rotates to make the mounting piece revolve around the rotating shaft, and rotates under the guidance of the auxiliary guide rod to absorb the product in the silo, and the rotating shaft rotates in the opposite direction to place the absorbed product on the conveying unit.

6. The pulp molding surface spraying system according to claim 5, wherein, The silo is movably equipped with a clamping piece, which is used to clamp the products in the silo one by one, so that the suction cup only absorbs one product at a time.

7. The pulp molding surface spraying system according to claim 5, characterized in that, The transverse movement robot has two workstations, one of which is used to transfer the product on the conveying unit to the spraying platform, and the other is used to transfer the product on the spraying platform to the drying mechanism.

8. The pulp molding surface spraying system according to claim 1, wherein The material receiving mechanism comprises a frame, on which two movable members arranged at intervals are slidably provided, the two movable members can slide relative to each other, and the two movable members are both provided with a first conveying member, and the two first conveying members transport products simultaneously; The frame is provided with a lifting member movable in the up and down directions. The lifting member passes through the middle of the two first conveying members to press the products on the two first conveying members. The two moving members move relative to each other to make the two first conveying members move away from each other, so that the lifting member supports the products. Two second conveying members arranged at intervals are provided on the frame. The second conveying members are located below the first conveying member. The lifting member passes through the middle of the two second conveying members to press the product. The lifting member descends so that the product supported by the lifting member falls onto the two second conveying members. The two second conveying members transport the product to the material receiving station.

9. The pulp molding surface spraying system according to claim 8, wherein, A gear that rotates about the vertical direction is provided on the frame. Both opposite sides of the gear are engaged with racks. The gear rotates to cause the two racks to move relative to each other. The two racks are respectively connected to the moving parts on the corresponding sides to drive the two moving parts to move.

10. A surface spraying process for pulp molding, characterized in that, Applied to the pulp molding surface spraying system according to any one of claims 1-9, it includes the following steps: Step 1: Place multiple products on the feeding mechanism in sequence, and the transverse transfer manipulator grabs the products onto the spraying platform in the spraying mechanism; Step 2: The nozzle sprays the coating towards the products. At the same time, the spraying platform rotates to evenly disperse the coating to each position of the products and remove the excess coating on the products; Step 3: The transverse transfer manipulator grabs the products on the spraying platform and moves them to the drying mechanism, and the drying mechanism dries the products; Step 4: The dried products move to the receiving mechanism, and the receiving mechanism sequentially receives the products.

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