Automobile door panel surface coating equipment

Abstract

Automobile door panel surface coating equipment relates to the technical field of spraying processing and comprises a first supporting seat and a second supporting seat which are symmetrically arranged, a coating box is fixed to the first supporting seat and the second supporting seat and is a horizontally-closed square box, and a continuous transfer assembly is arranged on the upper surface of the coating box; a pretreatment cleaning assembly, a steering drying assembly, a primer spraying assembly and a finishing paint spraying assembly are arranged in the coating box. The problems that when coating equipment in the traditional technology is used for surface treatment coating of an automobile door panel, clamping, positioning and continuous transferring are inconvenient, dead corners are prone to being left in surface cleaning, the drying adaptability in different processes is poor, primer and finish paint spraying is not uniform, and sagging or incomplete covering is prone to occurring are solved.

Description

Technical Field

[0001] The invention relates to the technical field of spraying processing, and in particular to a surface coating device for automobile door panels. Background Art

[0002] As the core interior component of the door system, the car door panel is both functional and decorative. Its design needs to take into account the internal structure coverage, user interaction experience and visual beauty. The current processing flow covers multiple complex processes such as injection molding, foam filling, skin coating and surface treatment, and continues to evolve in the direction of lightweight, environmental protection and intelligence to respond to the market demand for comfort, aesthetic quality and multi-functional integration.

[0003] Surface treatment is a key step in improving the appearance, mechanical durability and functionality of door panels. The mainstream processes include spraying, electroplating, in-mold decoration (IMD), laser engraving and coating. Among them, the spraying process is the first choice because of its controllable cost and wide adaptability. Its standardized process can be divided into: pre-treatment (degreasing, dust removal, passivation), primer spraying (adhesion enhancement), topcoat spraying (color and texture realization), baking and curing (coating cross-linking molding). However, due to the special structure of door panels (such as irregular thin plate geometry and dense distribution of functional slots), traditional spraying equipment faces significant bottlenecks in practical applications: 1. Low clamping and conveying efficiency: The special-shaped structure leads to poor positioning stability and insufficient compatibility with continuous production lines; 2. Cleaning blind spots exist: complex curved surfaces and slots are prone to residual release agents or dust, affecting the adhesion of the coating; 3. Poor adaptability of drying process: The curing temperature requirements of multi-layer coatings vary greatly, which can easily lead to thermal deformation or uneven curing; 4. Coating quality defects: Sagging, orange peel or spray leakage are prone to occur in the edge area, which requires repeated spraying and increases costs.

[0004] In summary, the prior art obviously has inconveniences and defects in practical use, so it is necessary to improve it. Summary of the invention

[0005] In view of the defects in the prior art, the present invention provides an automobile door panel surface coating equipment, which is used to solve the problems of the traditional coating equipment when used for the surface treatment and coating of automobile door panels, such as inconvenient clamping positioning and continuous transfer, dead corners easily left when cleaning the surface, poor drying adaptability in different processes, uneven spraying of primer and topcoat, and easy occurrence of sagging or incomplete coverage.

[0006] To achieve the above object, the present invention provides the following technical solutions: A surface coating device for automobile door panels comprises a first supporting seat and a second supporting seat which are symmetrically arranged, a coating box being fixed on the first supporting seat and the second supporting seat, the coating box being a horizontally closed square box, a continuous transfer assembly being provided on the upper surface of the coating box, a pretreatment cleaning assembly, a steering drying assembly, a primer spraying assembly and a topcoat spraying assembly being respectively provided inside the coating box.

[0007] As an optimized solution, the primer spraying assembly includes a primer mixing box fixedly connected to the inner top surface of the first support seat, and a mixing and stirring mechanism is provided in the primer mixing box.

[0008] As an optimized solution, a first delivery pump is fixedly connected to the inner top surface of the paint box, the first delivery pump is fixedly connected to the primer mixing box, the first delivery pump is externally connected to a main delivery pipe, the upper end of the main delivery pipe extends into the paint box and is externally connected to a plurality of branch pipes, the branch pipes are bent and extended upward, and a plurality of primer nozzles are respectively fixedly connected to the outer wall of the inner circle of each branch pipe.

[0009] As an optimized solution, the topcoat spraying assembly includes a topcoat mixing box fixedly connected to the inner top surface of the second support seat, and the mixing and stirring mechanism is also provided in the topcoat mixing box.

[0010] As an optimized solution, a second delivery pump is also fixedly connected to the inner top surface of the second support seat, and the second delivery pump is fixedly connected to the topcoat mixing box.

[0011] As an optimized solution, a topcoat transfer box is fixedly connected to each longitudinal outer wall of the painting box, and a rotating spray seat is provided in the painting box corresponding to each topcoat transfer box, and a plurality of topcoat spray heads are fixedly connected to the side end surface of the rotating spray seat.

[0012] As an optimized solution, the second delivery pump is externally connected to two branch feeding pipes, and the upper ends of the two branch feeding pipes are respectively fixedly connected to the two topcoat transfer boxes.

[0013] As an optimized solution, a square installation opening is respectively opened on each longitudinal side wall of the coating box, and the steering and drying assembly includes two drying boxes rotatably installed in the two square installation openings, and a drying mechanism is provided in the drying box.

[0014] As an optimized solution, the drying mechanism includes a power supply module fixedly connected to the closed outer end surface of each drying box, a fan drive motor is fixed on the power supply module, and the output shaft of the fan drive motor extends into the drying box and is fixedly connected to the fan blades.

[0015] As an optimized solution, an annular electric heating tube is provided between the fan blades and the fan drive motor, and the annular electric heating tube is fixedly connected to the power supply module.

[0016] As an optimized solution, two upper and lower symmetrical motor mounting plates are respectively provided on the inner side of each square mounting opening, and the ends of the motor mounting plates are fixedly connected to the longitudinal inner wall of the coating box. A steering motor is fixedly connected to the upper surface of the upper motor mounting plate, and the output shaft end of the steering motor passes through the motor mounting plate and is fixedly connected to the upper box wall of the drying box.

[0017] As an optimized solution, the continuous transfer assembly includes two parallel transverse guide rails, and the transverse guide rails are arranged above the coating box.

[0018] As an optimized solution, a sliding top seat is clamped between the two horizontal guide rails, and two symmetrical vertical guide rails are fixedly connected to the two ends of the lower surface of the sliding top seat. A first positioning frame is slidably provided on one of the vertical guide rails, and a second positioning frame is slidably provided on the other vertical guide rail.

[0019] As an optimized solution, the first positioning frame and the second positioning frame are both C-shaped frames, two symmetrical flat pressing clamps are telescopically provided on the inner top surface and inner bottom surface of the first positioning frame, and a side pushing clamp is telescopically provided on the inner side wall of the second positioning frame.

[0020] As an optimized solution, the pretreatment cleaning component includes a rotating water tank arranged above the inner bottom surface of the paint box, and each longitudinal side end face of the rotating water tank is respectively connected to a cleaning water pipe, and the end of the cleaning water pipe extends upward along the longitudinal inner wall of the paint box, and a number of cleaning nozzles arranged at equal intervals are fixedly connected to the outer wall of the inner circle of each cleaning water pipe.

[0021] As an optimized solution, a conveying avoidance opening is opened in the middle of the upper surface of the coating box, and two ends of the conveying avoidance opening respectively extend downward to two lateral side end surfaces of the coating box.

[0022] As an optimized solution, four conveying mounting plates that are symmetrical in pairs are fixed to the upper surface of the coating box, the transverse guide rail is fixed between two transversely opposite conveying mounting plates, the transverse guide rail is a U-shaped rail with a side opening, the sliding top seat is a horizontally arranged square seat, and an electric lead screw is provided in each of the transverse guide rails, and the electric lead screw passes through and is threadedly connected to the sliding top seat.

[0023] As an optimized solution, a driving motor is fixed to the upper surface of the sliding top seat corresponding to each of the vertical guide rails.

[0024] As an optimized solution, a rotating sleeve is fixedly connected to the center of the lower surface of the rotating water tank, the lower end of the rotating sleeve is rotatably clamped on the inner bottom surface of the coating box, and a transmission gear ring is fixedly connected to the outer peripheral wall of the rotating sleeve.

[0025] As an optimized solution, a transmission motor is fixedly connected to the lower surface of the coating box, the end of the output shaft of the transmission motor passes upward through the coating box and is fixedly connected to a transmission gear, the transmission gear is engaged with the transmission gear ring for transmission, and a waterproof cover is provided on the outer side of the transmission gear and the transmission gear ring, and the waterproof cover is arranged below the rotating water tank, and the lower end of the waterproof cover is fixedly connected to the inner bottom surface of the coating box.

[0026] As an optimized solution, a water storage tank and a water collecting tank are respectively provided on both longitudinal sides of the transmission motor, the water storage tank is fixedly connected to the inner top surface of the first support base, and the water collecting tank is fixedly connected to the inner top surface of the second support base.

[0027] As an optimized solution, a water supply pump is fixedly connected to the upper surface of the first support seat, and the water supply pump is externally connected to a water supply pipe. The water supply pipe passes downward through the first support seat and is fixedly connected to the water storage tank. The water storage tank is externally connected to a water inlet pipe. An upper water pipe is fixedly connected to the center of the lower surface of the rotating water tank, and the upper water pipe is rotatably docked with the end of the water inlet pipe.

[0028] As an optimized solution, the coating box is externally connected to a drainage pipe, a drainage valve is provided in the drainage pipe, and the lower end of the drainage pipe passes through the second support seat and is fixedly connected to the water collecting tank.

[0029] As an optimized solution, the mixing and stirring mechanism includes two stirring motors, which are respectively fixed to the lateral outer end faces of the primer proportioning box and the topcoat proportioning box, and the ends of the output shafts of the stirring motors are fixed with spiral mixing auger.

[0030] As an optimized solution, a first feeding box is fixedly connected to the upper surface of the first support seat, and the first feeding box is connected to the primer proportioning box.

[0031] As an optimized solution, a second feeding box is fixedly connected to the upper surface of the second support seat, and the second feeding box is connected to the topcoat mixing box.

[0032] As an optimized solution, a paint flow channel connected to a plurality of the topcoat spray heads is provided inside the rotating spray seat.

[0033] As an optimized solution, a connecting sleeve is fixedly connected to the back of the rotating spray seat, the connecting sleeve is connected to the paint flow channel, and the end of the connecting sleeve passes through the coating box and is rotatably mounted on the topcoat transfer box.

[0034] As an optimized solution, a rotating motor is fixedly connected to the outer wall of each topcoat transfer box, and the output shaft end of the rotating motor passes through the topcoat transfer box and the connecting sleeve in sequence and is fixedly connected to the rotating spray seat.

[0035] Compared with the prior art, the present invention has the following beneficial effects: The continuous transfer assembly provided in the present invention realizes adaptive clamping and multi-station coordination.

[0036] Specifically, this system achieves precise positioning and efficient transportation of automobile door panels in the painting process through continuous transfer components. Its core features include: adopting a multi-directional adjustment mechanism, using two horizontal guide rails and an electric screw to drive the sliding top seat to achieve horizontal transfer of door panels between multiple workstations, and controlling the vertical lifting and lowering of the first and second positioning frames through vertical guide rails and drive motors to adapt to different painting height requirements; applying a special-shaped parts adaptation clamping scheme, in which the first positioning frame is equipped with a vertically symmetrical telescopic flat pressing splint for pressing and fixing the main plane of the door panel, and the second positioning frame is provided with a side push splint, which cooperates with the flat pressing splint through a linkage mechanism to achieve flexible clamping of irregular door panel contours and avoid structural deformation.

[0037] The pretreatment cleaning component provided in the present invention can realize dynamic steering and no-dead-angle cleaning.

[0038] Specifically, this design uses steering spray washing technology to achieve three-dimensional cleaning coverage: the water tank is driven by a transmission motor, and the cleaning water pipe is driven to rotate around the axis (adjustable from 0 to 180°) through the gear-ring transmission system to dynamically adjust the nozzle angle; the cleaning nozzles are distributed in an array on both sides of the water pipe, combined with high-pressure water flow to achieve comprehensive coverage of complex parts such as curved surfaces and notches; the cleaning waste water is returned to the water collection tank through the drain pipe for centralized recovery to avoid secondary pollution of the coating environment.

[0039] The steering drying assembly provided in the present invention can realize multi-stage precise temperature control, and can perform adaptive drying in stages according to different coating curing requirements.

[0040] Specifically, the steering drying component includes a modular drying box with independent temperature control units arranged on both sides of the drying box, built-in fan drive motor, centrifugal fan blades and annular electric heating tubes to form a convection hot air circulation; the angle of the drying box is adjusted by the steering motor (±90°) to guide the airflow to the area to be treated in the door panel; in terms of process adaptability, thermal stress deformation can be avoided by regulating the temperature zones of pre-drying after cleaning (60-80°C), primer curing (90-110°C) and topcoat curing (110-130°C).

[0041] The primer spraying assembly and topcoat spraying assembly provided in the present invention can realize differentiated processes and intelligent paint supply.

[0042] Specifically, the primer spraying assembly and the topcoat spraying assembly in the present invention ensure the coating quality through differentiated design. Among them, the primer spraying assembly adopts fixed spraying, and the closed-loop paint supply system of primer proportioning box → first delivery pump → main delivery pipe → branch pipe ensures the uniform spraying of high adhesion primer (thickness tolerance ±5μm); the topcoat spraying assembly uses rotary spraying technology, and the two rotating spraying seats are driven by a motor to rotate on the topcoat transfer box to achieve multi-angle spraying without dead angles; the second delivery pump is linked with the proportioning box to monitor the viscosity of the paint in real time and dynamically adjust the mixing ratio. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0044] Figure 1 It is a schematic cross-sectional view of the internal structure of each component in the present invention in the main viewing direction; Figure 2 It is a schematic cross-sectional view of the internal structure of the present invention in a top view direction; Figure 3 It is a schematic cross-sectional view of the internal structure of the continuous transfer component and the pretreatment cleaning component in the present invention in the side view direction; Figure 4 It is a schematic cross-sectional view of the internal structure of the steering drying assembly in the present invention in the side view direction; Figure 5 It is a schematic cross-sectional view of the internal structure of the primer spraying assembly in the present invention in the side view direction; Figure 6 It is a schematic cross-sectional view of the internal structure of the topcoat spraying assembly in the present invention in the side view direction; Figure 7 It is an external overall schematic diagram of the present invention in the main viewing direction; Figure 8 It is a schematic diagram of the overall exterior of the present invention when viewed from above.

[0045] In the figure: 1-painting box, 2-vertical partition, 3-first support seat, 4-second support seat, 5-conveying installation plate, 6-lateral guide rail, 7-sliding top seat, 8-electric screw, 9-conveying avoidance port, 10-vertical guide rail, 11-driving motor, 12-first positioning frame, 13-second positioning frame, 14-flat pressure clamp, 15-side push clamp, 16-rotating water tank, 17-cleaning water pipe, 18-cleaning nozzle, 19-rotating sleeve, 20-transmission gear ring, 21-transmission motor, 22-transmission gear, 23-waterproof cover, 24-water storage tank, 25-water collecting tank, 26-water supply pump, 27-water supply pipe, 28-water inlet pipe, 29-water pipe, 30-drain pipe , 31-drain valve, 32-square mounting port, 33-drying box, 34-power supply module, 35-fan drive motor, 36-fan blades, 37-annular electric heating pipe, 38-motor mounting plate, 39-steering motor, 40-primer proportioning box, 41-stirring motor, 42-spiral mixing auger, 43-first feeding box, 44-first delivery pump, 45-main delivery pipe, 46-diversion branch pipe, 47-primer nozzle, 48-topcoat proportioning box, 49-second delivery pump, 50-diversion feeding pipe, 51-topcoat transfer box, 52-rotating spray seat, 53-topcoat nozzle, 54-paint flow channel, 55-connecting sleeve, 56-rotating motor, 57-second feeding box. DETAILED DESCRIPTION

[0046] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0047] like Figures 1 to 8 As shown, a surface coating equipment for automobile door panels includes a coating box 1. The coating box 1 is a horizontally closed square box. A plurality of vertical partitions 2 are fixedly provided on the inner bottom surface and the inner top surface of the coating box 1. The plurality of vertical partitions 2 divide the interior of the coating box 1 into a plurality of functional partitions. A continuous transfer component is provided on the upper surface of the coating box 1. A pretreatment cleaning component, a steering drying component, a primer spraying component and a topcoat spraying component are respectively provided inside the coating box 1.

[0048] A first support seat 3 and a second support seat 4 are respectively provided below the paint box 1. The first support seat 3 and the second support seat 4 are longitudinally symmetrically arranged. The first support seat 3 and the second support seat 4 are both right-angle seats extending laterally. The lower ends of the paint box 1 are respectively fixedly connected to the first support seat 3 and the second support seat 4.

[0049] The continuous transfer assembly includes four conveying mounting plates 5, which are symmetrically fixed to the upper surface of the coating box 1 in pairs. A transverse guide rail 6 is fixed between two laterally opposite conveying mounting plates 5. The transverse guide rail 6 is a U-shaped rail with a laterally open side. A sliding top seat 7 is clamped between the two transverse guide rails 6. The sliding top seat 7 is a horizontally arranged square seat. An electric lead screw 8 is respectively provided in each transverse guide rail 6, and the electric lead screw 8 passes through and is threadedly connected to the sliding top seat 7.

[0050] A conveying escape opening 9 is provided in the middle of the upper surface of the coating box 1 , and two ends of the conveying escape opening 9 extend downward to two lateral side end surfaces of the coating box 1 .

[0051] Two symmetrical vertical guide rails 10 are fixedly connected to the two ends of the lower surface of the sliding top seat 7, and a driving motor 11 is fixed to each vertical guide rail 10 on the upper surface of the sliding top seat 7. A first positioning frame 12 is slidably provided on one of the vertical guide rails 10, and a second positioning frame 13 is slidably provided on the other vertical guide rail 10. The first positioning frame 12 and the second positioning frame 13 are both C-shaped frames. Two symmetrical flat pressing clamps 14 are respectively telescopically provided on the inner top surface and inner bottom surface of the first positioning frame 12, and a side pushing clamp 15 is telescopically provided on the inner side wall of the second positioning frame 13.

[0052] The pretreatment cleaning component includes a rotating water tank 16 arranged above the inner bottom surface of the coating box 1, and each longitudinal side end face of the rotating water tank 16 is respectively connected to a cleaning water pipe 17, and the end of the cleaning water pipe 17 extends upward along the longitudinal inner wall of the coating box 1, and a plurality of cleaning nozzles 18 arranged at equal intervals are fixedly connected to the outer wall of the inner circle of each cleaning water pipe 17.

[0053] A rotating sleeve 19 is fixedly connected to the center of the lower surface of the rotating water tank 16 . The lower end of the rotating sleeve 19 is rotatably clamped on the inner bottom surface of the coating box 1 . A transmission gear ring 20 is fixedly connected to the outer peripheral wall of the rotating sleeve 19 .

[0054] A transmission motor 21 is fixedly connected to the lower surface of the coating box 1. The end of the output shaft of the transmission motor 21 passes upward through the coating box 1 and is fixedly connected to a transmission gear 22. The transmission gear 22 is engaged with a transmission gear ring 20 for transmission. A waterproof cover 23 is provided on the outer side of the transmission gear 22 and the transmission gear ring 20. The waterproof cover 23 is provided below the rotating water tank 16. The lower end of the waterproof cover 23 is fixedly connected to the inner bottom surface of the coating box 1.

[0055] A water storage tank 24 and a water collecting tank 25 are respectively provided on both longitudinal sides of the driving motor 21 . The water storage tank 24 is fixedly connected to the inner top surface of the first supporting base 3 , and the water collecting tank 25 is fixedly connected to the inner top surface of the second supporting base 4 .

[0056] A water supply pump 26 is fixedly connected to the upper surface of the first support seat 3, and the water supply pump 26 is externally connected to a water supply pipe 27. The water supply pipe 27 passes downward through the first support seat 3 and is fixedly connected to the water storage tank 24. The water storage tank 24 is externally connected to a water inlet pipe 28. An upper water pipe 29 is fixedly connected to the center of the lower surface of the rotating water tank 16, and the upper water pipe 29 is rotatably connected to the end of the water inlet pipe 28.

[0057] The coating box 1 is externally connected to a drainage pipe 30 , in which a drainage valve 31 is provided. The lower end of the drainage pipe 30 passes through the second support seat 4 and is fixedly connected to the water collecting tank 25 .

[0058] A square mounting opening 32 is provided on each longitudinal side wall of the coating box 1. The steering drying assembly includes two symmetrically arranged drying boxes 33. The drying boxes 33 are square boxes with a single-side opening. The two drying boxes 33 are rotatably installed in the two square mounting openings 32 respectively, and a drying mechanism is provided in the drying boxes 33.

[0059] The drying mechanism includes a power supply module 34 fixedly connected to the closed outer end surface of each drying box 33, a fan drive motor 35 is fixed to the power supply module 34, and the output shaft of the fan drive motor 35 extends into the drying box 33 and is fixedly connected to a fan blade 36.

[0060] An annular electric heating pipe 37 is provided between the fan blades 36 and the fan drive motor 35 , and the annular electric heating pipe 37 is fixedly connected to the power supply module 34 .

[0061] Two upper and lower symmetrical motor mounting plates 38 are respectively provided on the inner side of each square mounting opening 32. The ends of the motor mounting plates 38 are fixedly connected to the longitudinal inner wall of the coating box 1. The upper surface of the upper motor mounting plate 38 is fixedly connected to a steering motor 39. The end of the output shaft of the steering motor 39 passes through the motor mounting plate 38 and is fixedly connected to the upper box wall of the drying box 33.

[0062] The primer spraying assembly comprises a primer proportioning box 40 , which is fixedly connected to the inner top surface of the first support seat 3 , and a mixing and stirring mechanism is arranged inside the primer proportioning box 40 .

[0063] The mixing and stirring mechanism comprises a stirring motor 41 fixedly connected to the transverse outer end surface of the primer proportioning box 40 , and the output shaft end of the stirring motor 41 extends into the primer proportioning box 40 and is fixedly connected to a spiral mixing auger 42 .

[0064] A first feeding box 43 is fixedly connected to the upper surface of the first support seat 3 , and the first feeding box 43 is connected to the primer mixing box 40 . A second feeding box 57 is fixedly connected to the upper surface of the second support seat 4 , and the second feeding box 57 is connected to the topcoat mixing box 48 .

[0065] A first delivery pump 44 is fixedly connected to the inner top surface of the coating box 1, and the first delivery pump 44 is fixedly connected to the primer mixing box 40. The first delivery pump 44 is externally connected to a main delivery pipe 45. The upper end of the main delivery pipe 45 passes through the coating box 1 and extends laterally along its inner bottom surface. The main delivery pipe 45 is externally connected to a plurality of branch pipes 46, and the branch pipes 46 are bent and extended upward. A plurality of primer nozzles 47 are respectively fixedly connected to the outer wall of the inner circle of each branch pipe 46.

[0066] The topcoat spraying assembly includes a topcoat proportioning box 48 , which is fixedly connected to the inner top surface of the second support seat 4 , and a mixing and stirring mechanism is also provided in the topcoat proportioning box 48 .

[0067] A second delivery pump 49 is also fixedly connected to the inner top surface of the second support seat 4 . The second delivery pump 49 is fixedly connected to the topcoat proportioning box 48 . The second delivery pump 49 is externally connected to two branch feeding pipes 50 .

[0068] A topcoat transfer box 51 is fixedly connected to each longitudinal outer wall of the painting box 1 , and a rotating spray seat 52 is provided in the painting box 1 corresponding to each topcoat transfer box 51 . A plurality of topcoat spray heads 53 are fixedly connected to the side end surface of the rotating spray seat 52 .

[0069] A paint flow channel 54 connected to a plurality of topcoat spray heads 53 is provided inside the rotating spraying seat 52 .

[0070] A connecting sleeve 55 is fixedly connected to the back of the rotating spraying seat 52 . The connecting sleeve 55 is connected to the paint flow channel 54 . The end of the connecting sleeve 55 passes through the coating box 1 and is rotatably mounted on the topcoat transfer box 51 .

[0071] A rotating motor 56 is fixedly connected to the outer side wall of each topcoat transfer box 51 , and the output shaft end of the rotating motor 56 passes through the topcoat transfer box 51 and the connecting sleeve 55 in sequence and is fixedly connected to the rotating spraying seat 52 .

[0072] The two branching feeding pipes 50 respectively pass through the first supporting seat 3 and the second supporting seat 4 upwards and are fixedly connected to the two topcoat transfer boxes 51 .

[0073] When the present invention is used: first, the automobile door panel to be sprayed is clamped between the first positioning frame 12 and the second positioning frame 13, and is precisely positioned by the side push clamping plate 15 and the two flat pressing clamping plates 14. Then, the electric lead screw 8 is controlled to rotate, and the sliding top seat 7 is driven to slide horizontally along the transverse guide rail 6, so that the automobile door panel passes through the conveying avoidance port 9 and is transferred to the coating box 1. Next, the driving motor 11 is started to control the first positioning frame 12 and the second positioning frame 13 to slide along the two vertical guide rails 10 to adjust the spraying height of the automobile door panel.

[0074] Before spraying, start the water supply pump 26, inject the cleaning water into the water storage tank 24 through the water supply pipe 27, and then inject it into the rotating water tank 16 through the water inlet pipe 28 and the upper water pipe 29 in sequence. The rotating water tank 16 divides the cleaning water and fills the two cleaning water pipes 17. Start the transmission motor 21 to drive the transmission gear 22 to rotate, and through the transmission of the transmission gear ring 20 and the rotating sleeve 19, the rotating water tank 16 rotates around the axis, thereby adjusting the working angle of the cleaning water pipe 17 relative to the automobile door panel. Turn on the cleaning nozzle 18 to perform cleaning pretreatment on the automobile door panel before spraying.

[0075] After cleaning, the sliding top seat 7 is controlled to continue to move horizontally, and the two fan drive motors 35 are started at the same time to drive the fan blades 36 to rotate. The power supply module 34 supplies power to the annular electric heating tube 37, heats the outside air and blows it out in opposite directions, forming a drying convection to dry the residual moisture on the surface of the automobile door panel. After drying, the sliding top seat 7 continues to move horizontally to transfer the automobile door panel to the primer spraying assembly for primer spraying.

[0076] The two-component primer and diluent are put into the primer proportioning box 40 through the first feeding box 43 for mixing and proportioning. After the primer proportioning is completed, the first delivery pump 44 is started to deliver the primer to the main delivery pipe 45, and then diverted to each branch pipe 46. The primer spray head 47 is turned on to spray the primer on the surface of the automobile door panel. After the primer spraying is completed, the two steering motors 39 are respectively started to drive the drying box 33 to rotate and change the flow direction of the drying airflow, so as to dry the primer on the automobile door panel.

[0077] The sliding top seat 7 is controlled to continue to move horizontally, and the automobile door panel is transferred to the topcoat spraying assembly for topcoat spraying. The two-component topcoat and the thinner are put into the topcoat proportioning box 48 through the second feeding box 57 for stirring and proportioning. After the topcoat proportioning is completed, the second delivery pump 49 is started to convey the topcoat to the two topcoat transfer boxes 51 through the split feeder pipe 50, and then the topcoat transfer box 51 flows into the paint flow channel 54 in the rotating spraying seat 52. The rotating motor 56 is started to drive the rotating spraying seat 52 to rotate, and the topcoat nozzle 53 is turned on at the same time to perform topcoat rotation spraying on the automobile door panel.

[0078] After the topcoat is sprayed, the steering drying assembly is used again to dry the surface of the automobile door panel. After drying, the automobile door panel is moved out of the painting box 1 as a whole and disassembled for taking out.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A surface coating equipment for automobile door panels, characterized in that: The invention comprises a first support seat (3) and a second support seat (4) which are symmetrically arranged, a coating box (1) being fixed on the first support seat (3) and the second support seat (4), the coating box (1) being a horizontally closed square box, a continuous transfer assembly being arranged on the upper surface of the coating box (1), and a pretreatment cleaning assembly, a steering drying assembly, a primer spraying assembly and a topcoat spraying assembly being arranged inside the coating box (1); The primer spraying assembly comprises a primer proportioning box (40) fixedly connected to the inner top surface of the first support seat (3), and a mixing and stirring mechanism is provided in the primer proportioning box (40); A first delivery pump (44) is fixedly connected to the inner top surface of the coating box (1), the first delivery pump (44) is fixedly connected to the primer mixing box (40), the first delivery pump (44) is externally connected to a main delivery pipe (45), the upper end of the main delivery pipe (45) extends into the coating box (1) and is externally connected to a plurality of branch pipes (46), the branch pipes (46) are bent and extended upward, and a plurality of primer spray heads (47) are respectively fixedly connected to the outer wall of the inner circle of each branch pipe (46); The topcoat spraying assembly comprises a topcoat proportioning box (48) fixedly connected to the inner top surface of the second support seat (4), and the topcoat proportioning box (48) is also provided with the mixing and stirring mechanism; A second delivery pump (49) is also fixedly connected to the inner top surface of the second support seat (4), and the second delivery pump (49) is fixedly connected to the topcoat mixing box (48); A topcoat transfer box (51) is fixedly connected to each longitudinal outer wall of the coating box (1), and a rotating spray seat (52) is provided in the coating box (1) corresponding to each topcoat transfer box (51), and a plurality of topcoat spray heads (53) are fixedly connected to the side end surface of the rotating spray seat (52); The second delivery pump (49) is externally connected to two flow-dividing feeding pipes (50), and the upper ends of the two flow-dividing feeding pipes (50) are respectively fixedly connected to the two topcoat transfer boxes (51); A square mounting opening (32) is respectively provided on each longitudinal side wall of the coating box (1), and the steering drying assembly comprises two drying boxes (33) rotatably mounted in the two square mounting openings (32), wherein a drying mechanism is provided in the drying boxes (33).

2. The automobile door panel surface coating equipment according to claim 1, characterized in that: The drying mechanism comprises a power supply module (34) fixedly connected to the closed outer end surface of each drying box (33), a fan drive motor (35) being fixedly connected to the power supply module (34), and an output shaft of the fan drive motor (35) extending into the drying box (33) and fixedly connected to a fan blade (36); An annular electric heating pipe (37) is provided between the fan blades (36) and the fan drive motor (35), and the annular electric heating pipe (37) is fixedly connected to the power supply module (34); Two motor mounting plates (38) symmetrically arranged in an upper and lower direction are respectively arranged on the inner side of each of the square mounting openings (32); the ends of the motor mounting plates (38) are fixedly connected to the longitudinal outer wall of the coating box (1); a steering motor (39) is fixedly connected to the upper surface of the motor mounting plate (38) located above; the output shaft end of the steering motor (39) passes through the motor mounting plate (38) and is fixedly connected to the upper box wall of the drying box (33).

3. The automobile door panel surface coating equipment according to claim 1, characterized in that: The continuous transfer assembly comprises two parallel transverse guide rails (6), wherein the transverse guide rails (6) are arranged above the coating box (1); A sliding top seat (7) is clamped between the two transverse guide rails (6), and two symmetrical vertical guide rails (10) are fixedly connected to the two ends of the lower surface of the sliding top seat (7), wherein a first positioning frame (12) is slidably provided on one of the vertical guide rails (10), and a second positioning frame (13) is slidably provided on the other vertical guide rail (10); The first positioning frame (12) and the second positioning frame (13) are both C-shaped frames, two symmetrical flat pressing clamps (14) are telescopically provided on the inner top surface and inner bottom surface of the first positioning frame (12), and a side pushing clamp (15) is telescopically provided on the inner side wall of the second positioning frame (13).

4. The automobile door panel surface coating equipment according to claim 1, characterized in that: The pretreatment cleaning component comprises a rotating water tank (16) arranged above the inner bottom surface of the coating box (1), each longitudinal side end surface of the rotating water tank (16) is externally connected to a cleaning water pipe (17), the end of the cleaning water pipe (17) extends upward along the longitudinal inner wall of the coating box (1), and a plurality of cleaning nozzles (18) arranged at equal intervals are fixedly connected to the outer wall of the inner circle of each cleaning water pipe (17).

5. The automobile door panel surface coating equipment according to claim 3, characterized in that: A conveying avoidance opening (9) is provided in the middle of the upper surface of the coating box (1), and two ends of the conveying avoidance opening (9) respectively extend downward to two lateral side end surfaces of the coating box (1); The upper surface of the coating box (1) is fixedly connected with four conveying mounting plates (5) which are symmetrical in pairs. The transverse guide rail (6) is fixedly connected between two transversely opposite conveying mounting plates (5). The transverse guide rail (6) is a U-shaped rail with a side opening. The sliding top seat (7) is a horizontally arranged square seat. An electric lead screw (8) is arranged in each of the transverse guide rails (6). The electric lead screw (8) passes through and is threadedly connected to the sliding top seat (7). A driving motor (11) is fixed to the upper surface of the sliding top seat (7) corresponding to each of the vertical guide rails (10).

6. The automobile door panel surface coating equipment according to claim 4, characterized in that: A rotating sleeve (19) is fixedly connected at the center of the lower surface of the rotating water tank (16); the lower end of the rotating sleeve (19) is rotatably clamped on the inner bottom surface of the coating box (1); and a transmission gear ring (20) is fixedly connected to the outer peripheral wall of the rotating sleeve (19); A transmission motor (21) is fixedly connected to the lower surface of the coating box (1). The output shaft end of the transmission motor (21) passes through the coating box (1) upward and is fixedly connected to a transmission gear (22). The transmission gear (22) is engaged with the transmission gear ring (20) for transmission. A waterproof cover (23) is provided on the outer side of the transmission gear (22) and the transmission gear ring (20). The waterproof cover (23) is arranged below the rotating water tank (16). The lower end of the waterproof cover (23) is fixedly connected to the inner bottom surface of the coating box (1).

7. The automobile door panel surface coating equipment according to claim 6, characterized in that: A water storage tank (24) and a water collecting tank (25) are respectively provided on both longitudinal sides of the drive motor (21); the water storage tank (24) is fixedly connected to the inner top surface of the first support base (3), and the water collecting tank (25) is fixedly connected to the inner top surface of the second support base (4); A water supply pump (26) is fixedly connected to the upper surface of the first support seat (3), the water supply pump (26) is externally connected to a water supply pipe (27), the water supply pipe (27) passes downward through the first support seat (3) and is fixedly connected to the water storage tank (24), the water storage tank (24) is externally connected to a water inlet pipe (28), an upper water pipe (29) is fixedly connected to the center of the lower surface of the rotating water tank (16), and the upper water pipe (29) is rotatably connected to the end of the water inlet pipe (28); The coating box (1) is externally connected to a drainage pipe (30), a drainage valve (31) is provided in the drainage pipe (30), and the lower end of the drainage pipe (30) passes through the second support seat (4) and is fixedly connected to the water collecting tank (25).

8. The automobile door panel surface coating equipment according to claim 1, characterized in that: The mixing and stirring mechanism comprises two stirring motors (41), the two stirring motors (41) being fixedly connected to the lateral outer end surfaces of the primer proportioning box (40) and the topcoat proportioning box (48), respectively, and the ends of the output shafts of the stirring motors (41) being fixedly connected to spiral mixing auger (42).

9. The automobile door panel surface coating equipment according to claim 1, characterized in that: A first feeding box (43) is fixedly connected to the upper surface of the first support seat (3), and the first feeding box (43) is connected to the primer mixing box (40); A second feeding box (57) is fixedly connected to the upper surface of the second support seat (4), and the second feeding box (57) is connected to the topcoat mixing box (48).

10. The automobile door panel surface coating equipment according to claim 1, characterized in that: The rotating spraying seat (52) has a paint flow channel (54) inside that is connected to a plurality of the topcoat spray heads (53); A connecting sleeve (55) is fixedly connected to the back of the rotating spraying seat (52), the connecting sleeve (55) is connected to the paint flow channel (54), and the end of the connecting sleeve (55) passes through the coating box (1) and is rotatably clamped on the topcoat transfer box (51); A rotating motor (56) is fixedly connected to the outer wall of each topcoat transfer box (51), and the output shaft end of the rotating motor (56) passes through the topcoat transfer box (51) and the connecting sleeve (55) in sequence and is fixedly connected to the rotating spray seat (52).

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