Spraying equipment based on double-layer plastic shell processing
By introducing a synchronous positioning technology of rotating material rings and clamping plates into the spraying equipment, the problems of unstable clamping and inner coating entry during the spraying process of double-layer plastic pipe fittings are solved, and stable and uniform spraying effect and cost reduction are achieved.
Patent Information
- Application Number
- CN202510733976.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-04
- Publication Date
- 2025-08-19
AI Technical Summary
When the existing spraying device sprays the double-layer plastic pipe fitting shell, the clamping force is unstable, which easily damages the pipe fittings, and requires additional work stations to apply film to prevent inner layer spraying, increasing costs and working hours.
A spraying equipment based on double-layer plastic shell processing is designed, which is divided into the feeding area, spraying area and curing area through a triangular partition frame. The rotating material ring and clamping plate are used for synchronous positioning and spraying. The sealing and uniform spraying are achieved by combining the sealing and driving parts to ensure that the distance from each surface to the spray head is consistent and the coating is avoided from entering the inner layer.
It achieves stable clamping and uniformity during the spraying process, avoids the paint entering the inner layer, reduces damage risks and costs, and improves the spraying efficiency and quality.
Smart Images
Figure CN120502452A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of plastic processing and spraying, and in particular to a spraying device based on double-layer plastic shell processing. Background Art
[0002] Some current plastic pipes utilize a double-layer structure (e.g., hollow walls and internal reinforcement) to significantly enhance ring stiffness and compressive strength. To further enhance resistance, some products utilize different materials for the inner and outer layers to achieve different results. To enhance corrosion resistance, wear and scratch resistance, aesthetics and decorative effects, and mechanical properties, some plastic pipes are coated with a special coating.
[0003] When spraying the outer surface of a plastic pipe casing, an existing spraying device generally sets a plurality of pneumatic fingers on a rotating disk. The pipe is sleeved on the pneumatic fingers and clamped and fixed by the pneumatic fingers. The pipe is then rotated to the spraying position for spraying. Since the pneumatic fingers are highly dependent on air pressure, their clamping force is affected by fluctuations in the air source pressure. If the factory air source pressure is unstable (±0.1MPa changes), the clamping force deviation may reach ±15%, which may cause clamping failure and unstable clamping, or damage the plastic pipe. In addition, since the inner and outer layers of double-layer plastic pipes are made of different materials, some of the coatings sprayed on the outside cannot be applied to the inner material, and some plastic pipe casings do not require spraying operations. The usual practice is to stick a plastic film on the top of the plastic pipe casing to prevent the ingress of paint. This method requires additional workstations for film sticking operations, which results in higher costs and increased working hours. To this end, we designed a spraying equipment based on double-layer plastic casing processing. Summary of the Invention
[0004] The present invention proposes a spraying device based on double-layer plastic shell processing to solve the above problems.
[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A spraying device based on double-layer plastic shell processing includes a base, an upper plate and a drive ring are fixed in the air above the base by a bracket, a triangular partition frame is fixed above the upper plate, the triangular partition frame divides the upper end of the upper plate into three fan-shaped areas, and the three areas are a loading area, a spraying area and a curing area in sequence, a fan-shaped top plate is fixedly installed on the upper end of the triangular partition frame, and the top plate is arranged at the upper end of the spraying area and the curing area, and a side cover is fixedly installed on the outer side of the triangular partition frame, and two of the fan-shaped areas are sealed by the cooperation of the triangular partition frame, the side cover and the top plate, and the two sealed fan-shaped areas are respectively a spraying area and a curing area, and a spraying structure for spraying and a curing structure for coating curing are respectively installed in the spraying area and the curing area; An annular hole groove is provided on the upper surface of the upper plate, and the upper plate is divided into an outer ring and an inner ring by the annular hole groove, wherein the outer ring and the inner ring are fixed to the base through a bracket, and a rotating material ring is rotatably installed in the annular hole groove, and three groups of material racks are fixed in an annular array above the rotating material ring, and the three groups of material racks are respectively placed in the loading area, the spraying area and the curing area, and each group of material racks are distributed in a fan-shaped and equidistant manner, and the material rack includes a discharge sleeve fixed above the rotating material ring, and a sealing member is fixed on the top of the discharge sleeve, and four groups of offset notches are provided in an annular array on the outer surface of the discharge sleeve, and a clamping plate is slidably inserted in the offset notch, and a driving member is slidably installed inside the discharge sleeve, and the lower end of the driving member passes through the rotating material ring and is placed below it, and is in sliding contact with the upper surface of the driving ring.
[0006] Preferably, the three side panels of the triangular partition frame are each provided with a material port for entering and exiting the workpiece, and the three material ports are distributed in a circular array. A door panel is linearly slidably mounted on the side of the material port, and an offset roller is fixed to the bottom end of the door panel. The design of the door panel can seal the interior of the curing area and the spraying area, so that the airflow or paint inside is not easy to overflow, thereby ensuring the cleanliness of the surrounding environment; The side of the door panel is provided with multiple groups of offset sliding slots, and offset columns are slidably inserted in the offset sliding slots. The offset columns are fixed to the side of the triangular partition frame, and an outer cover is fixed to the outside of the offset sliding slot. The end of the offset column away from the triangular partition frame passes through the offset sliding slot and extends into the outer cover. The end of the offset column in the outer cover is fixedly sleeved with a positioning ring, and the positioning ring is in sliding contact with the door panel. The offset column can guide the movement of the door panel to make its movement more stable. The outer cover can block the offset column and the offset sliding slot to prevent paint from entering during spraying, causing it to be unable to open or close.
[0007] Preferably, the upper plate is penetrated by three groups of linear slots distributed in a circular array, and the three groups of linear slots are respectively located directly below the three door panels. A thickened ring is welded to the inner ring below the rotating material ring, and three groups of drive slots are opened on the thickened ring. The three groups of drive slots are connected end to end in sequence. The bottom end of the offset roller passes through the linear slide groove and is placed below the upper plate, and the bottom end of the offset roller slides into the drive slot. The thickened ring is provided with three groups of drive grooves and three groups of V-shaped grooves, which are alternately distributed. The two ends of the V-shaped groove are respectively connected with one end of the two adjacent drive grooves. The drive groove is a fan-shaped retaining groove. The V-shaped groove includes a positioning groove, an open groove and a closed groove. The open groove and the closed groove are symmetrically distributed in an eight-shaped shape on both sides of the positioning groove, wherein the end of the open groove away from the positioning groove is connected with one end of an adjacent retaining groove, and the end of the closed groove away from the positioning groove is connected with one end of an adjacent retaining groove.
[0008] Preferably, the retaining groove and the positioning groove are both arc-shaped notches, and the centers of the two are collinear with the centers of the thickening ring and the rotating material ring. The inner diameter of the retaining groove is smaller than the inner diameter of the positioning groove, and the difference between the inner diameters of the two is greater than the width of the material opening. In the initial state, that is, when the three groups of material racks are respectively located inside the three areas, the offset rollers under the three door panels are respectively located at the intersections of the positioning grooves and the opening grooves in the three driving grooves.
[0009] Preferably, a gear ring is fixed to the lower end of the thickening ring, and a precision divider is installed on the upper end of the base through a bracket. A gear is installed on the output shaft of the precision divider, and the gear is meshed with the gear ring. The precision divider can make the rotating material ring rotate 120 degrees each time through the gear and the gear ring, thereby ensuring that the position of the three groups of material racks each time they rotate is at the position of the previous group of material racks, which is convenient for spraying and curing, and after each rotation, the offset roller can be located in the positioning groove; A circular track is fixed above the base through a bracket, and a plurality of track sliders distributed in a circular array are provided below the rotating material ring. The rotating material ring is rotatably installed on the circular track through the track sliders. The circular track can be used to support and rotate the rotating material ring.
[0010] Preferably, a strip-shaped opening is formed by cutting away a portion of the inner side of the clamping plate, and a plurality of inclined offset grooves are symmetrically formed through the surfaces of both sides of the clamping plate, and the offset grooves on each side of the clamping plate are equidistantly distributed from top to bottom, the upper end of the offset groove is close to the lifting rod, and the lower end of the offset groove is away from the lifting rod; The rotating material ring is penetrated by a plurality of circular holes distributed in an annular array from top to bottom, each discharge sleeve corresponds to a circular hole, and the axis of the discharge sleeve is collinear with the axis of the circular hole. The driving member includes a lifting rod that is slidably inserted in the circular hole up and down, and a plurality of shaft racks distributed in an annular array are provided on the outer ring surface above the lifting rod, and shaft rollers are fixed on the shaft racks, and the shaft racks are slidably inserted into the strip-shaped opening, and the shaft rollers are slidably extended into the offset groove; During the spraying process, the workpiece will not shake in position and can be centered to ensure that the distance between each surface of the workpiece and each nozzle is consistent, ensuring uniformity after spraying.
[0011] Preferably, the lower part of the lifting rod passes through the circular hole and is located below the rotating material ring, and the bottom end of the lifting rod is rotatably mounted with a roller through an axle pin, and the part of the lifting rod below the rotating material ring is fixed with an abutment ring, and a downward pressure spring is sleeved on the part, and the upper and lower ends of the downward pressure spring are respectively in contact with the upper surface of the abutment ring and the lower surface of the rotating material ring; The upper portion of the driving ring is cut away to form a downward moving surface, and the downward moving surface is located directly below the loading area. The driving ring is located below the curing area and the spraying area to form an upward moving surface. The upward moving surface and the downward moving surface are connected by an inclined surface, and the roller is in rolling contact with the downward moving surface and the upward moving surface. When the roller is on the downward surface, since the height of the downward surface is lower than the ascending surface, the lifting rod will move downward under the action of the lower compression spring. When the roller moves from the downward surface to above the ascending surface, the height rises, and the lifting rod will move upward the distance of one end, thereby causing the clamping plate to expand outward.
[0012] Preferably, the sealing member includes a top sleeve fixed to the top of the discharge sleeve, the top of the top sleeve is designed to be sealed, a plurality of air ports in a ring array are opened on the side surface of the top sleeve, an expansion member is fixed to the outer ring surface of the top sleeve, the interior of the expansion member is connected to the air port, a piston is fixed to the top of the lifting rod, the piston is slidably inserted into the top sleeve, and a sealing design is designed between the two, the expansion member includes two rings fixed to the outer ring of the top sleeve, an air bag is bonded between the two rings, when the lifting rod drives the piston to move upward, the internal space of the top sleeve is reduced, the air pressure is increased, the air bag expands outward and contacts the inner wall of the workpiece, so that the paint scattered from the outside will not enter the inner wall of the workpiece and cause pollution; When the lifting rod moves downward, the internal space of the top sleeve increases, the air pressure decreases, and the airbag contracts inward and does not contact the inner wall of the workpiece.
[0013] Preferably, two guide columns are vertically fixed in the spraying area, and the spraying structure includes a lifting arc plate that is slidably sleeved on the two guide columns. The lifting arc plate is provided with a plurality of evenly distributed circular openings, and an annular material pipe is fixed above each circular opening. The inner ring of the annular material pipe is provided with a plurality of evenly distributed nozzles. The annular material pipe is also connected to a feed pipe, and the other end of the feed pipe is connected to an external spraying device. Two cylinders are installed above the top plate, and the push rods of the cylinders pass through the top plate and are in the spraying area, and the bottom ends of the push rods of the cylinders are connected to the lifting arc plate; Multiple nozzles are evenly arranged around the circumference of the workpiece, and each nozzle covers a specific area at a fixed angle. By adjusting the spray angle and distance of the nozzle, the spray range is ensured to overlap and avoid spraying leaks. The nozzle can move up and down under the action of the cylinder, thereby performing a full-scale spraying operation on the workpiece.
[0014] Preferably, the curing structure includes a plurality of air outlet pipes fixed in the curing area by a bracket, and the air outlet pipes are provided with a plurality of evenly distributed air nozzles on the side facing the discharge sleeve. An air inlet pipe is also welded on the air outlet pipe, and the other end of the air inlet pipe is connected to the hot air blower. An exhaust pipe is provided on the top plate, and the lower end of the exhaust pipe is connected to the interior of the curing area, and the upper end of the exhaust pipe is connected to an external induced draft fan.
[0015] Beneficial effects of the present invention: 1. A triangular partition frame is used to separate the loading area, spraying area and curing area above the upper plate. A group of material racks are set in each area, and each group of material racks includes a discharge sleeve and multiple clamping plates slidably arranged on the discharge sleeve. A driving member for lifting is also provided in the discharge sleeve. The bottom end of the driving member is in rolling contact with the driving ring. When the material rack is in the spraying area and the curing area, multiple material racks can synchronously clamp and position the workpiece sleeved on the outside thereof, and will not loosen due to malfunction. During the spraying process, the workpiece will not shake in position, and the workpiece can be centrally positioned to ensure that the distance between each surface of the workpiece and each nozzle is consistent, thereby ensuring uniformity after spraying; 2. By arranging a sealing member at the top of the discharge sleeve, the sealing member is linked with the driving member. When the material rack moves from the loading area to the spraying area and the curing area, the expansion member in the sealing member will expand under the action of the piston. The outer ring surface of the expansion member will contact and fit with the upper inner wall of the workpiece, forming a sealing structure for the upper part of the workpiece. When spraying, the external paint will not enter the inner wall of the workpiece, ensuring the cleanliness of the inner wall of the workpiece. Moreover, when the material rack moves from the curing area to the loading area, the sealing member will shrink away from the inner wall of the workpiece, which is also convenient for removing the workpiece. 3. By setting multiple evenly distributed clamping plates around the discharge sleeve, the clamping plates are connected to the driving parts, and the multiple clamping plates can be synchronously extended and retracted, so that the workpiece can be centrally positioned, ensuring that the expansion parts are evenly pressed against the inner wall of the workpiece, avoiding the existence of gaps, ensuring that the inner wall of the workpiece is not contaminated, and the surface of the internal driving parts and clamping plates will not be attached to particles, ensuring the clamping positioning accuracy; 4. By setting a door panel on the triangular partition frame, the door panel is linked with the rotating material ring and the thickening ring through the offset roller. When the rotating material ring rotates, the door panel can automatically open, so that the paint in the spraying area will not fly around, ensuring the cleanliness of the surrounding environment, and ensuring the temperature in the curing area, reducing heat loss. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a schematic diagram of a front and cross-section of a spraying device based on double-layer plastic shell processing proposed by the present invention; Figure 2 for Figure 1 The schematic diagram of the structure in which the side cover and top plate are not provided; Figure 3 for Figure 2 A top view of Figure 4 for Figure 3 Schematic diagram of the cross section at AA; Figure 5 This is an exploded view of the rotating material ring, door panel, and precision divider in the figure; Figure 6 for Figure 5 Schematic diagram of the positions of the middle thickening ring and the offset roller; Figure 7 for Figure 2 Schematic diagram of the structure of the middle drive ring and the material rack; Figure 8 for Figure 7 Exploded view of the center rack.
[0017] Numbers in the figure: 1, base; 11, upper plate; 111, linear hole groove; 12, side cover; 13, top plate; 2, triangular partition; 21, material opening; 22, door panel; 221, offset roller; 222, offset slide; 223, offset column; 224, outer cover; 3, rotating material ring; 31, thickening ring; 32, driving groove; 321, opening groove; 322, holding groove; 323, closing groove; 324, positioning groove; 33, gear ring; 34, annular track; 4, discharge sleeve; 401, offset notch; 41, clamping plate; 411, strip mouth; 412, offset Shift groove; 42. Sealing part; 421. Top sleeve; 422. Air port; 423. Expansion part; 43. Driving part; 431. Lifting rod; 432. Downward pressure spring; 433. Abutment ring; 434. Roller; 435. Axle frame; 436. Axle roller; 437. Piston; 44. Driving ring; 441. Downward moving surface; 442. Ascending surface; 5. Cylinder; 51. Guide column; 6. Lifting arc plate; 61. Annular material pipe; 62. Nozzle; 63. Feed pipe; 7. Exhaust pipe; 71. Air nozzle; 72. Inlet pipe; 73. Exhaust pipe; 8. Precision divider; 81. Gear. DETAILED DESCRIPTION
[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.
[0019] Reference Figure 1 - Figure 8 A spraying device based on a double-layer plastic shell includes a base 1, an upper plate 11 and a drive ring 44 are suspended and fixed above the base 1 through a bracket, and the drive ring 44 is located below the upper plate 11, and a triangular partition frame 2 is fixed above the upper plate 11; The triangular partition frame 2 divides the upper end of the upper plate 11 into three fan-shaped areas, which are the loading area, the spraying area and the curing area, respectively. The upper end of the triangular partition frame 2 is fixedly installed with a fan-shaped top plate 13, which is arranged at the upper end of the spraying area and the curing area. The outer side of the triangular partition frame 2 is fixedly installed with a side cover 12. The triangular partition frame 2, the side cover 12 and the top plate 13 cooperate to seal two of the fan-shaped areas. The two sealed fan-shaped areas are the spraying area and the curing area, respectively. The spraying structure for spraying and the curing structure for curing the paint are installed in the spraying area and the curing area respectively. An annular hole groove is provided on the upper surface of the upper plate 11, and the upper plate 11 is divided into an outer ring and an inner ring by the annular hole groove, wherein the outer ring and the inner ring are fixed to the base 1 through a bracket, and a rotating material ring 3 is rotatably installed in the annular hole groove, and three groups of material racks are fixed in an annular array above the rotating material ring 3, and the three groups of material racks are respectively placed in the loading area, the spraying area and the curing area. Each group of material racks are distributed in a fan-shaped and equidistant manner, and the material rack includes a discharge sleeve 4 fixed above the rotating material ring 3, and a sealing member 42 is fixed on the top of the discharge sleeve 4. Four groups of offset notches 401 are provided in an annular array on the outer surface of the discharge sleeve 4, and a clamping plate 41 is slidably inserted in the offset notch 401. A driving member 43 is slidably installed inside the discharge sleeve 4, and the lower end of the driving member 43 passes through the rotating material ring 3 and is placed below it, and is in sliding contact with the upper surface of the driving ring 44.
[0020] Reference Figure 2 、 Figure 4 and 5 , the three side panels of the triangular partition frame 2 are all provided with material ports 21 for entering and exiting workpieces. The three material ports 21 are distributed in a ring array. The side of the material port 21 is linearly slidably mounted with a door panel 22. The bottom end of the door panel 22 is fixed with an offset roller 221. The design of the door panel 22 can seal the interior of the curing area and the spraying area, so that the airflow or paint inside is not easy to overflow, thereby ensuring the cleanliness of the surrounding environment; The side of the door panel 22 is provided with multiple groups of offset sliding slots 222, and offset columns 223 are slidably inserted in the offset sliding slots 222. The offset columns 223 are fixed to the side of the triangular partition frame 2, and an outer cover 224 is fixed to the outside of the offset sliding slots 222. The end of the offset column 223 away from the triangular partition frame 2 passes through the offset sliding slots 222 and extends into the outer cover 224. The end of the offset column 223 in the outer cover 224 is fixedly sleeved with a positioning ring, and the positioning ring is in sliding contact with the door panel 22. The offset column 223 can guide the movement of the door panel 22 to make its movement more stable. The outer cover 224 can block the offset column 223 and the offset sliding slots 222 to prevent paint from entering during spraying, causing it to be unable to open or close.
[0021] Reference Figure 5 、 Figure 6 The upper plate 11 is penetrated by three groups of linear slots 111 distributed in a circular array. The three groups of linear slots 111 are respectively located directly below the three door panels 22. A thickening ring 31 is welded below the inner ring of the rotating material ring 3. The thickening ring 31 is provided with three groups of driving slots 32. The three groups of driving slots 32 are connected end to end in sequence. The bottom end of the offset roller 221 passes through the linear slide slot 111 and is placed below the upper plate 11. The bottom end of the offset roller 221 slides into the driving slot 32. Three groups of driving grooves 32 and three groups of V-shaped grooves are provided on the thickening ring 31. The driving grooves 32 and the V-shaped grooves are alternately distributed. The two ends of the V-shaped grooves are respectively connected to one end of the two adjacent driving grooves 32. The driving groove 32 is a fan-shaped retaining groove 322. The V-shaped groove includes a positioning groove 324, an open groove 321 and a closed groove 323. The open groove 321 and the closed groove 323 are symmetrically distributed in an eight-shaped shape on both sides of the positioning groove 324, wherein the end of the open groove 321 away from the positioning groove 324 is connected to one end of an adjacent retaining groove 322, and the end of the closed groove 323 away from the positioning groove 324 is connected to one end of an adjacent retaining groove 322.
[0022] The retaining groove 322 and the positioning groove 324 are both arc-shaped grooves, and the centers of the two are collinear with the centers of the thickening ring 31 and the rotating material ring 3. The inner diameter of the retaining groove 322 is smaller than the inner diameter of the positioning groove 324, and the difference between the inner diameters of the two is greater than the width of the material opening 21. In the initial state, that is, when the three groups of material racks are respectively located in the three areas, the offset rollers 221 under the three door panels 22 are respectively located at the intersections of the positioning grooves 324 and the opening grooves 321 in the three driving grooves 32; When the rotating material ring 3 rotates clockwise, since the thickening ring 31 is welded and fixed to the rotating material ring 3, the thickening ring 31 will rotate clockwise therewith. At this time, the offset roller 221 will gradually move along the opening groove 321 toward the retaining groove 322. Since the inner diameter of the retaining groove 322 is smaller than the inner diameter of the positioning groove 324, the offset roller 221 will move inward along the linear hole groove to approach the center of the rotating material ring 3, thereby causing the door panel 22 fixed to the offset roller 221 to move inward linearly along the offset column 223. When the offset roller 221 moves into the holding groove 322, the three door panels 22 will be fully opened and the material opening 21 will be exposed. At this time, the discharge sleeve 4 closest to the door panel 22 is still a distance away from the material opening 21. After rotating the material ring 3, it continues to rotate clockwise, and the offset roller 221 is in the holding groove 322 and moves toward the closing groove 323. At this time, the door panels 22 will remain in the open state. When the offset roller 221 moves to the intersection of the closing groove 323 and the retaining groove 322, the multiple material racks in the loading area are all moved to the spraying area. Similarly, the multiple material racks in the spraying area and the curing area will also be moved to the curing area and the loading area respectively. Then the rotating material ring 3 continues to rotate and makes multiple groups of material racks in a certain position, that is, the offset roller 221 moves to the positioning groove 324. In the process of the offset roller 221 passing through the closing groove 323 and moving to the positioning groove 324, the offset roller 221 will move outward in a straight line along the straight hole groove, so that the door panel 22 moves outward together, and then the door panel 22 is completely closed, blocking the material port 21 to prevent the internal paint or gas from escaping.
[0023] Reference Figure 4 、 Figure 5 A gear ring 33 is fixed to the lower end of the thickening ring 31, and a precision divider 8 is installed on the upper end of the base 1 through a bracket. A gear 81 is installed on the output shaft of the precision divider 8, and the gear 81 is engaged with the gear ring 33. The precision divider 8 can make the rotating material ring 3 rotate 120 degrees each time through the gear 81 and the gear ring 33, thereby ensuring that the position of the three groups of material racks each time they rotate is at the position of the previous group of material racks, which is convenient for spraying and curing, and after each rotation, the offset roller 221 can be in the positioning groove 324; A circular track 34 is fixed above the base 1 through a bracket, and a plurality of track sliders distributed in a circular array are provided below the rotating material ring 3. The rotating material ring 3 is rotatably installed on the circular track 34 through the track sliders. The circular track 34 can be used to support and rotate the rotating material ring 3.
[0024] Reference Figure 7 、 Figure 8 A strip-shaped opening 411 is formed by cutting away a portion of the inner side of the clamping plate 41, and a plurality of inclined offset grooves 412 are symmetrically formed through the surfaces of both sides of the clamping plate 41. The 412 on each side of the clamping plate 41 are evenly spaced from top to bottom, and the upper end of the offset groove 412 is close to the lifting rod 431, and the lower end of the offset groove 412 is away from the lifting rod 431; The rotating material ring 3 is penetrated by a plurality of circular holes distributed in an annular array from top to bottom. Each discharge sleeve 4 corresponds to a circular hole, and the axis of the discharge sleeve 4 is collinear with the axis of the circular hole. The driving member 43 includes a lifting rod 431 that is slidably inserted into the circular hole. The outer ring surface above the lifting rod 431 is provided with a plurality of shaft brackets 435 distributed in an annular array. A shaft roller 436 is fixed on the shaft bracket 435. The shaft bracket 435 is slidably inserted into the strip-shaped opening 411, and the shaft roller 436 slides into the offset groove 412. When the lifting rod 431 moves upward, the shaft roller 436 on the shaft frame 435 will move upward along the offset groove 412. Since the clamping plate 41 is slidably placed in the offset notch 401 and can only move left and right but not up and down, the multiple clamping plates 41 will move outward along the offset notch 401 synchronously, thereby clamping and positioning the workpiece received thereon. Conversely, when the lifting rod 431 moves downward, the multiple clamping plates 41 will simultaneously retract inward, releasing the clamping and positioning of the workpiece. During the spraying process, the workpiece will not wobble in position and can be centrally positioned to ensure that the distance between each surface of the workpiece and each nozzle 62 is consistent, thereby ensuring uniformity after spraying.
[0025] Reference Figure 7 、 Figure 8The lower part of the lifting rod 431 passes through the circular hole and is located below the rotating material ring 3, and the bottom end of the lifting rod 431 is rotatably mounted with a roller 434 through an axle pin. The lifting rod 431 is located below the rotating material ring 3 and is fixed with an abutment ring 433, and a downward pressure spring 432 is sleeved on the part. The upper and lower ends of the downward pressure spring 432 are respectively in contact with the upper surface of the abutment ring 433 and the lower surface of the rotating material ring 3; The portion above the drive ring 44 is cut away to form a downward surface 441, which is located directly below the loading area. The portion of the drive ring 44 below the curing area and the spraying area forms an upward surface 442. The upward surface 442 is connected to the downward surface 441 by an inclined surface, and the roller 434 is in rolling contact with the downward surface 441 and the upward surface 442. When the roller 434 is on the downward surface 441, since the height of the downward surface 441 is lower than the rising surface 442, the lifting rod 431 will move downward under the action of the downward compression spring 432. When the roller 434 moves from the downward surface 441 to above the rising surface 442, the height rises, and the lifting rod 431 will move upward by the distance of one end, thereby causing the clamping plate 41 to expand outward.
[0026] Reference Figure 8 The sealing member 42 includes a top sleeve 421 fixed to the top of the discharge sleeve 4, the top of the top sleeve 421 is sealed, and a plurality of air ports 422 in a ring array are provided on the side surface of the top sleeve 421. An expansion member 423 is fixed to the outer ring surface of the top sleeve 421, and the interior of the expansion member 423 is communicated with the air port 422. A piston 437 is fixed to the top of the lifting rod 431, and the piston 437 slides up and down and is inserted into the top sleeve 421, and a sealing design is designed between the two. The expansion member 423 includes two rings fixed to the outer ring of the top sleeve 421, and an air bag is bonded between the two rings. When the lifting rod 431 drives the piston 437 to move upward, the internal space of the top sleeve 421 is reduced, the air pressure increases, the air bag expands outward and contacts the inner wall of the workpiece, so that the paint scattered from the outside will not enter the inner wall of the workpiece and cause pollution; When the lifting rod 431 moves downward, the internal space of the top sleeve 421 increases, the air pressure decreases, and the airbag contracts inward and does not contact the inner wall of the workpiece.
[0027] Reference Figure 1 - Figure 4, two guide columns 51 are vertically fixed in the spraying area, and the spraying structure includes a lifting arc plate 6 that is slidably sleeved on the two guide columns 51 up and down, and a plurality of evenly distributed circular openings are opened on the lifting arc plate 6, and an annular material tube 61 is fixed above each circular opening, and a plurality of evenly distributed nozzles 62 are provided on the inner ring of the annular material tube 61, and a feed pipe 63 is also connected to the annular material tube 61, and the other end of the feed pipe 63 is connected to an external spraying device. Two cylinders 5 are installed above the top plate 13, and the push rod of the cylinder 5 passes through the top plate 13 and is in the spraying area, and the bottom end of the push rod of the cylinder 5 is connected to the lifting arc plate 6. A closed-loop feedback system is used to control the two groups of cylinders 5, and a sensor is set inside the cylinder. The sensor provides real-time feedback and precise adjustment of the algorithm, wherein the position, force, and speed control are respectively achieved through encoders, force sensors, and speed measurement feedback, combined with PID algorithm for dynamic adjustment to achieve millimeter-level positioning and instantaneous response; Multiple nozzles 62 are evenly arranged around the circumference of the workpiece, and each nozzle 62 covers a specific area at a fixed angle. By adjusting the spraying angle and distance of the nozzle 62, the spraying range is ensured to overlap and avoid spraying leaks. The nozzle 62 can move up and down under the action of the cylinder 5, thereby performing a full-scale spraying operation on the workpiece.
[0028] Reference Figure 1 - Figure 4 The curing structure includes multiple air outlet pipes 7 fixed in the curing area by brackets. The air outlet pipe 7 is provided with multiple evenly distributed air nozzles 71 on the side facing the discharge sleeve 4. An air inlet pipe 72 is also welded on the air outlet pipe 7. The other end of the air inlet pipe 72 is connected to the hot air blower. An exhaust pipe 73 is provided on the top plate 13. The lower end of the exhaust pipe 73 is connected to the inside of the curing area, and the upper end of the exhaust pipe 73 is connected to an external induced draft fan. The air outlet of the induced draft fan is connected to the purification equipment. The gas in the fixed area can be discharged through the induced draft fan and discharged into the atmosphere after being processed by the purification equipment. The hot air flow can be blown to the workpiece in the curing area through the air inlet pipe 72, the air outlet pipe 7 and the air nozzle 71, so that the paint on the surface of the workpiece is quickly cured, so that it will not be scratched when it is unloaded and taken.
[0029] Working principle: put a plurality of workpieces to be sprayed on the discharge sleeve 4, then turn on the power of the precision divider 8, and the precision divider 8 rotates the rotating material ring 3 clockwise by 1 / 3 circle through the gear 81 and the gear ring 33.
[0030] During the process of rotating the material ring 3 rotating 1 / 3 clockwise, the thickened ring 31 located at the inner lower side of the rotating material ring 3 will rotate clockwise together with it. At this time, the offset roller 221 will gradually move along the opening groove 321 toward the retaining groove 322. Because the inner diameter of the retaining groove 322 is smaller than the inner diameter of the positioning groove 324, the offset roller 221 will move inward along the linear hole groove to approach the center of the rotating material ring 3, thereby causing the door panel 22 fixed to the offset roller 221 to move inward linearly along the offset column 223. When the offset roller 221 moves into the holding groove 322, the three door panels 22 will be fully opened and the material opening 21 will be exposed. At this time, the discharge sleeve 4 closest to the door panel 22 is still a distance away from the material opening 21. After rotating the material ring 3, it continues to rotate clockwise, and the offset roller 221 is in the holding groove 322 and moves toward the closing groove 323. At this time, the door panels 22 will remain in the open state. At the same time, when the offset roller 221 moves along the opening groove 321 and the holding groove 322, the multiple discharge sleeves 4, the clamping plate 41, the blocking member 42 and the driving member 43 on the rotating material ring 3 will deflect together, and the roller 434 under the driving member 43 will roll along the upper surface of the driving ring 44. When the roller 434 in the driving member 43 moves from the lower surface 441 through the inclined surface to the upper surface of the rising surface 442, since the height of the rising surface 442 is higher than the lower surface 441, the lifting rod 431 in the entire driving member 43 will move upward for a distance, and when the lifting rod 431 moves upward, the lifting rod 431 will move upward. During movement, the shaft roller 436 on the shaft frame 435 will move upward along the offset groove 412. Since the clamping plate 41 is slidably placed in the offset notch 401 and can only move left and right but not up and down, the multiple clamping plates 41 will move outward along the offset notch 401 synchronously, so that the multiple clamping plates 41 can clamp and position the workpiece connected to the outside, so that the workpiece will not shake in position during the spraying process, and the workpiece can be centrally positioned to ensure that the distance between each surface of the workpiece and each nozzle 62 is consistent, thereby ensuring uniformity after spraying. When the lifting rod 431 moves upward, the piston 437 at the top of the lifting rod 431 will also move upward. At this time, the internal space of the top sleeve 421 decreases, the air pressure increases, and the airbag expands outward and contacts the inner wall of the workpiece, which will make the upper part of the workpiece sealed without any gaps, so that the paint scattered from the outside will not enter the inner wall of the workpiece and cause pollution. When the offset roller 221 moves to the intersection of the closing groove 323 and the holding groove 322, the multiple material racks in the loading area are all moved to the spraying area. Similarly, the multiple material racks in the spraying area and the curing area will also be moved to the curing area and the loading area respectively. Then, the rotating material ring 3 continues to rotate and makes the multiple groups of material racks in a determined position, that is, the offset roller 221 moves to the intersection of the positioning groove 324 and the opening groove 321. In the process of the offset roller 221 passing through the closing groove 323 and moving to the positioning groove 324, the offset roller 221 will move outward in a straight line along the linear hole groove, so that the door panel 22 moves outward together, thereby making the door panel 22 completely closed, blocking the material port 21 to prevent the paint or gas inside from escaping; When the offset roller 221 moves to the intersection of the positioning groove and the open groove 321, the multiple material racks and workpieces in the spraying area are directly below the spraying structure, and the push rod of the cylinder 5 extends downward and causes the lifting arc plate 6 to move downward together. The annular material tube 61 located on the lifting arc plate 6 will be above the workpiece and move from top to bottom. During the up and down movement, multiple nozzles 62 will spray the surface of the workpiece. After the spraying is completed, the lifting arc plate 6 rises back to its original position under the action of the cylinder 5.
[0031] Afterwards, the precision divider 8 rotates the rotating material ring 3 clockwise by 1 / 3 of a turn again through the gear 81 and the gear ring 33, and the door panel 22 will repeat the above operation to open and close, ensuring that the workpiece can smoothly enter the curing zone. Since the roller 434 of this part of the driving member 43 is still on the rising surface 442, the position height of the lifting rod 431 will not change, and the workpiece will still be clamped and positioned. At this time, the multiple workpieces that have been sprayed will be moved to the curing zone. When in the curing zone, the hot air flow will be blown to the workpiece in the curing zone through the air inlet pipe 72, the air outlet pipe 7 and the air nozzle 71, so that the paint on the surface of the workpiece is quickly cured, so that it will not be scratched when it is unloaded and taken out. The material rack originally located in the curing area will move to the loading area, and when moving from the curing area to the loading area, the roller 434 located on the driving member 43 will move from the rising surface 442 to the lowering surface 441, and the overall height will drop. The lifting rod 431 will move downward under the action of the downward pressure spring 432, and the downward moving lifting rod 431 will cause multiple clamping plates 41 to move inward synchronously to release the clamping of the workpiece. At the same time, the lifting rod 431 drives the piston 437 to move downward, the internal space of the top sleeve 421 increases, the air pressure decreases, and the airbag contracts inward and does not contact the inner wall of the workpiece. When in the loading area, the workpiece can be removed and a new workpiece to be sprayed is placed, and the above operations can be repeated.
[0032] A loading area, a spraying area and a curing area are separated above the upper plate 11 by a triangular partition frame 2. A group of material racks are set in each area, and each group of material racks includes a discharge sleeve 4 and a plurality of clamping plates 41 slidably arranged on the discharge sleeve 4. A driving member 43 for lifting is also provided in the discharge sleeve 4. The bottom end of the driving member 43 is in rolling contact with the driving ring 44. When the material rack is in the spraying area and the curing area, the material rack can clamp and position the workpiece sleeved on the outside thereof. During the spraying process, the workpiece will not shake in position and can be centrally positioned to ensure that the distance between each surface of the workpiece and each nozzle 62 is consistent, thereby ensuring uniformity after spraying. By setting a blocking member 42 at the top of the discharge sleeve 4, the blocking member 42 is linked with the driving member 43. When the material rack is inside the spraying area, the expansion member 423 in the blocking member 42 will expand and cooperate with the clamping plate 41. The clamping plate 41 performs center positioning on the workpiece and ensures that the expansion member 423 is evenly pressed against the inner wall of the workpiece around, avoiding the existence of gaps and ensuring that the inner wall of the workpiece is not contaminated. In addition, the surface of the internal driving member 43 and the clamping plate 41 will not be attached to particles, thereby ensuring the clamping positioning accuracy. By setting a door panel 22 on the triangular partition frame 2, the door panel 22 is linked with the rotating material ring 3 and the thickening ring 31 through the offset roller 221. When the rotating material ring 3 rotates, the door panel 22 can automatically open or close, so that the paint in the spraying area will not fly around, ensuring the cleanliness of the surrounding environment, and ensuring the temperature in the curing area, reducing heat loss.
[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.
[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.
[0035] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.
Claims
1. A spraying device based on double-layer plastic shell processing, characterized in that: The invention comprises a base (1), an upper plate (11) and a driving ring (44) are fixed in the air above the base (1) by a bracket, a triangular partition frame (2) is fixed above the upper plate (11), the triangular partition frame (2) divides the upper end of the upper plate (11) into three fan-shaped areas, the three areas being a loading area, a spraying area and a curing area, a fan-shaped top plate (13) is fixedly installed on the upper end of the triangular partition frame (2), the top plate (13) is arranged at the upper end of the spraying area and the curing area, and a side cover (12) is fixedly installed on the outer side of the triangular partition frame (2); An annular hole groove is provided on the upper surface of the upper plate (11), and a rotating material ring (3) is rotatably installed in the annular hole groove. Three groups of material racks are fixed in an annular array above the rotating material ring (3), and the three groups of material racks are respectively placed in the loading area, the spraying area and the curing area. Each group of material racks is distributed in a fan-shaped equidistant manner. The material rack includes a discharge sleeve (4) fixed above the rotating material ring (3), and a sealing member (42) is fixed on the top of the discharge sleeve (4). Four groups of offset notches (401) are provided in an annular array on the outer surface of the discharge sleeve (4), and a clamping plate (41) is slidably inserted in the offset notch (401). A driving member (43) is slidably installed inside the discharge sleeve (4), and the lower end of the driving member (43) passes through the rotating material ring (3) and is placed below it.
2. The spraying equipment based on double-layer plastic shell processing according to claim 1 is characterized in that: The three side panels of the triangular partition frame (2) are each provided with a material opening (21) for entering and exiting workpieces, the three material openings (21) being distributed in a circular array, a door panel (22) being linearly slidably mounted on the side of the material opening (21), and an offset roller (221) being fixed to the bottom end of the door panel (22); The side of the door panel (22) is provided with a plurality of offset sliding openings (222), wherein offset columns (223) are slidably inserted into the offset sliding openings (222), the offset columns (223) are fixed to the side of the triangular partition frame (2), and an outer cover (224) is fixed to the outside of the offset sliding openings (222).
3. The spraying equipment based on double-layer plastic shell processing according to claim 2 is characterized in that: The upper plate (11) is penetrated by three groups of linear slots (111) distributed in a circular array, and the three groups of linear slots (111) are respectively located directly below the three door panels (22). A thickening ring (31) is welded to the inner ring below the rotating material ring (3), and three groups of driving slots (32) are opened on the thickening ring (31). The three groups of driving slots (32) are connected end to end in sequence. The bottom end of the offset roller (221) passes through the linear slot (111) and is placed below the upper plate (11), and the bottom end of the offset roller (221) slides into the driving slot (32). The thickening ring (31) is provided with three groups of driving grooves (32) and three groups of V-shaped grooves. The driving grooves (32) and the V-shaped grooves are alternately distributed. The two ends of the V-shaped grooves are respectively connected to one end of two adjacent driving grooves (32). The driving groove (32) is a retaining groove (322) arranged in a fan shape. The V-shaped groove includes a positioning groove (324), an opening groove (321) and a closing groove (323). The opening groove (321) and the closing groove (3223) are symmetrically distributed in an eight-shaped shape on both sides of the positioning groove (324). The end of the opening groove (321) away from the positioning groove (324) is connected to one end of an adjacent retaining groove (322), and the end of the closing groove (323) away from the positioning groove (324) is connected to one end of an adjacent retaining groove (322).
4. The spraying equipment based on double-layer plastic shell processing according to claim 3 is characterized in that: The retaining groove (322) and the positioning groove (324) are both arc-shaped grooves, and the centers of the two circles are collinear with the centers of the thickening ring (31) and the rotating material ring (3). The inner diameter of the retaining groove (322) is smaller than the inner diameter of the positioning groove (324), and the difference in inner diameters between the two is greater than the width of the material opening (21).
5. The spraying equipment based on double-layer plastic shell processing according to claim 3 is characterized in that: A gear ring (33) is fixed to the lower end of the thickened ring (31), a precision divider (8) is mounted on the upper end of the base (1) via a bracket, a gear (81) is mounted on the output shaft of the precision divider (8), and the gear (81) is meshed with the gear ring (33); An annular track (34) is fixed above the base (1) via a bracket, and a plurality of track sliders distributed in an annular array are provided below the rotating material ring (3). The rotating material ring (3) is rotatably mounted on the annular track (34) via the track sliders.
6. The spraying equipment based on double-layer plastic shell processing according to claim 1 is characterized in that: A strip-shaped opening (411) is formed by cutting away a portion of the inner side of the clamping plate (41), and a plurality of inclined offset grooves (412) are symmetrically formed through the surfaces of both sides of the clamping plate (41), and the (412) on each side of the clamping plate (41) are equidistantly distributed from top to bottom; The rotating material ring (3) is penetrated by a plurality of circular holes distributed in a circular array from top to bottom, and the driving member (43) includes a lifting rod (431) that is slidably inserted into the circular hole. The outer ring surface above the lifting rod (431) is provided with a plurality of shaft frames (435) distributed in a circular array, and a shaft roller (436) is fixed on the shaft frame (435). The shaft frame (435) is slidably inserted into the strip-shaped opening (411), and the shaft roller (436) is slidably extended into the offset groove (412).
7. The spraying equipment based on double-layer plastic shell processing according to claim 6 is characterized in that: The lower part of the lifting rod (431) passes through the circular hole and is located below the rotating material ring (3), and the bottom end of the lifting rod (431) is rotatably mounted with a roller (434) through an axle pin. The part of the lifting rod (431) located below the rotating material ring (3) is fixed with an abutment ring (433), and a lower compression spring (432) is sleeved on the part. The upper and lower ends of the lower compression spring (432) are respectively in contact with the upper surface of the abutment ring (433) and the lower surface of the rotating material ring (3); The portion above the driving ring (44) is cut away to form a downward surface (441), and the downward surface (441) is located directly below the loading area. The portion of the driving ring (44) below the curing area and the spraying area forms an upward surface (442), and the upward surface (442) is connected to the downward surface (441) through an inclined surface. The roller (434) is in rolling contact with the downward surface (441) and the upward surface (442).
8. The spraying equipment based on double-layer plastic shell processing according to claim 6 is characterized in that: The sealing member (42) includes a top sleeve (421) fixed on the top of the discharge sleeve (4), the top of the top sleeve (421) is designed to be sealed, and the side surface of the top sleeve (421) is provided with a plurality of air ports (422) in a ring array, an expansion member (423) is fixed on the outer ring surface of the top sleeve (421), and the interior of the expansion member (423) is connected to the air port (422), and a piston (437) is fixed on the top of the lifting rod (431), and the piston (437) slides up and down and is inserted into the top sleeve (421), and a sealing design is designed between the two.
9. The spraying equipment based on double-layer plastic shell processing according to claim 1 is characterized in that: The spraying area is provided with a spraying structure for spraying and a curing structure for curing the coating. Two guide columns (51) are vertically fixed in the spraying area. The spraying structure includes a lifting arc plate (6) that is slidably sleeved on the two guide columns (51) up and down. The lifting arc plate (6) is provided with a plurality of evenly distributed circular openings. An annular material pipe (61) is fixed above each circular opening. The inner ring of the annular material pipe (61) is provided with a plurality of evenly distributed nozzles (62). The annular material pipe (61) is also connected to a feed pipe (63). The other end of the feed pipe (63) is connected to an external spraying device. Two cylinders (5) are installed above the top plate (13). The push rods of the cylinders (5) pass through the top plate (13) and are in the spraying area, and the bottom ends of the push rods of the cylinders (5) are connected to the lifting arc plate (6).
10. The spraying equipment based on double-layer plastic shell processing according to claim 1 is characterized in that: A curing structure for curing the coating is installed in the curing zone, and the curing structure includes a plurality of air outlet pipes (7) fixed in the curing zone by a bracket, and a plurality of evenly distributed air nozzles (71) are provided on the side of the air outlet pipe (7) facing the discharge sleeve (4), and an air inlet pipe (72) is welded to the air outlet pipe (7), and the other end of the air inlet pipe (72) is connected to the hot air blower. An exhaust pipe (73) is provided on the top plate (13), and the lower end of the exhaust pipe (73) is communicated with the interior of the curing zone, and the upper end of the exhaust pipe (73) is connected to an external induced draft fan.