Surface paint spraying process and equipment for automobile trim panel

Abstract

The invention relates to the technical field of paint spraying wastewater treatment, in particular to a surface paint spraying process and equipment for an automobile trim panel, and the surface paint spraying process and equipment comprises a paint spraying module, a water curtain module, a water collecting tank, an advection tank, a gas generator, a first gas outlet plate, a transition tank and a slag collecting tank, the water collecting tank is arranged at the bottom of the water curtain module and used for collecting waste water with paint, the advection tank is arranged on one side of the water collecting tank, the first air outlet plate is provided with a plurality of air holes and arranged in the advection tank, the gas generator is connected with the first air outlet plate, and the first air outlet plate is arranged in the advection tank. The transition groove is provided with a bottom water outlet pipe and a top water outlet pipe, and the slag collecting groove is formed in one side of the top water outlet pipe. Therefore, bubbles and liquid can be more fully mixed, and the paint treatment efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of paint spraying wastewater treatment, and in particular to a surface spraying paint process and equipment for automobile decorative panels. Background Art

[0002] During the surface painting process of automobile trim panels, wastewater is generated in multiple steps. These wastewaters usually contain organic solvents, pigments, resins, heavy metal ions and other chemicals, which are potentially harmful to the environment. During the spraying process, oversprayed paint will fall on the floor or walls of the spray booth, and water curtains or water screens are usually needed to capture the oversprayed paint. These water curtains or water screens will become wastewater containing paint and solvents.

[0003] There is a wastewater treatment method, which includes turning on the water inlet pump and the micro-nano bubble generating device, adjusting the air intake of the gas volume regulating switch to 0.3-0.7 mL / min, at which time the milky white gas-water mixture reaches the reaction chamber of the flotation tank through the ejector; turning on the agitator, first adjusting the pH value of the wastewater to a certain value through the dosing tank, and then adding a certain amount of flocculant; the gas-water mixture reaches the separation chamber through the contact chamber, and the paint in the wastewater floats to the water surface under the strong mixing action of the ejector through the entrainment and supporting action of the micro-nano bubbles and flocculants, and is finally collected in the slag collecting tank.

[0004] In the above process, the reaction chamber is large in volume, and the bubbles ejected by the ejector cannot be well mixed with the liquid in the entire reaction chamber, thereby reducing the paint processing efficiency. Therefore, some paint will remain in the water in the reaction chamber, which will have an adverse effect on the water curtain device when the water resources are reused. Summary of the invention

[0005] The object of the present invention is to provide a surface spray painting process and equipment for automobile decorative panels, aiming to more fully mix bubbles and liquids and improve the processing efficiency of paint.

[0006] To achieve the above-mentioned objectives, the present invention provides a surface painting device for automobile trim panels, comprising a paint spraying module, a water curtain module, a water collecting trough, a horizontal flow trough, a gas generator, a first air outlet plate, a transition trough and a slag collecting trough, wherein the water curtain module is arranged on one side of the paint spraying module, the water collecting trough is arranged at the bottom of the water curtain module for collecting wastewater with paint, the horizontal flow trough is arranged on one side of the water collecting trough, the first air outlet plate has a plurality of air holes, the first air outlet plate is arranged in the horizontal flow trough, the gas generator is connected to the first air outlet plate, the transition trough has a bottom water outlet pipe and a top water outlet pipe, and the slag collecting trough is arranged on one side of the top water outlet pipe.

[0007] Among them, the first air outlet plate includes a joint, a plurality of rotating rods, a support rod and a first driving unit, the support rod has a gas channel, the first driving unit is connected to the support rod, the rotating rod has a plurality of air outlet holes, a plurality of the rotating rods are fixed to the support rod, the air outlet holes are connected to the gas channel, the joint is rotatably connected to the support rod, and is connected to the gas generator.

[0008] Wherein, the top water outlet pipe and the slag collecting trough have a height difference.

[0009] Among them, a flow control valve is arranged on the bottom water outlet pipe of the transition trough, and a liquid level detector is arranged near the top water outlet pipe of the transition trough. The liquid level detector is used to detect the liquid level height in the transition trough, and the control module is used to control the flow of the flow control valve based on the liquid level height.

[0010] Wherein, the control module includes a data acquisition unit, a judgment unit and a control unit. The data acquisition unit is used to acquire liquid level height data; the judgment unit is used to calculate the difference based on the liquid level height data and the target height data; the control unit is used to control the opening of the flow control valve according to the difference.

[0011] Wherein, the surface painting equipment of the automobile trim panel also includes a second air outlet plate, and the second air outlet plate is arranged in the transition groove.

[0012] Wherein, the second gas outlet plate includes a gas outlet plate body and a flow regulator, and the flow regulator is used to adjust the gas flow generated by the gas outlet plate body.

[0013] The slag collecting tank comprises a tank body, a stirring structure, a feeding structure and a filtering structure. The stirring structure is arranged in the tank body, the filtering structure is arranged at the bottom of the stirring structure, and the feeding structure is arranged on one side of the tank body.

[0014] In a second aspect, the present invention further provides a surface painting process for an automobile decorative panel, comprising: a painting module spraying paint on the automobile decorative panel, and a water curtain module generating a water curtain to absorb excess paint;

[0015] The sump collects the waste water that absorbs the paint and passes the waste water through the advection trough;

[0016] The gas generator is started, and the bubbles generated by the first gas outlet plate are fully contacted with the wastewater in the advection trough, so that the paint particles float up under the action of the bubbles;

[0017] The wastewater enters the transition tank, the upper layer of wastewater with paint particles enters the slag collecting tank, and the lower layer of wastewater is reused in the water curtain module.

[0018] The present invention discloses a surface painting process and equipment for automobile decorative panels, wherein a painting module performs surface painting on the automobile decorative panels. It is usually equipped with an advanced spray gun and a control system, and can adjust the painting parameters according to different painting requirements to achieve high-quality painting effects. The water curtain module is located on one side of the painting module, and its main function is to form a barrier through water flow to capture excess paint particles and harmful gases generated during the painting process, thereby reducing the emission of these substances to the external environment and playing a role in purifying the air.

[0019] The water collection tank is arranged below the water curtain module, and is mainly used to collect wastewater containing paint after being filtered by the water curtain. By centrally collecting these wastewaters, they can be further treated. The advection tank is located on one side of the water collection tank. In this tank, the flow rate of the water flow can be reduced to increase the mixing effect with the gas. The gas generator is connected to the first gas outlet plate, and is used to generate and transport gas to the inside of the advection tank. By controlling the flow rate and pressure of the gas, tiny bubbles can be formed in the advection tank, which helps to separate the paint particles from the water body and improve the wastewater treatment efficiency. The first gas outlet plate is installed in the advection tank and is covered with tiny pores. When the gas is released through these pores, a large number of tiny bubbles will be formed in the water, which can effectively absorb the paint particles in the water and promote them to float to the surface of the water for subsequent removal.

[0020] The transition tank has a design of a bottom outlet pipe and a top outlet pipe, and is a key component connecting the advection tank and the slag collecting tank. Through this design, the treated clean water can be effectively discharged from the bottom, and the sewage containing more paint particles can be guided from the top to the slag collecting tank, realizing the separation of clean and dirty water. The slag collecting tank is set on one side of the top outlet pipe, and is specially used to collect the sewage containing a large number of paint particles flowing out from the top of the transition tank. Here, these sewage can be further treated by sedimentation or other physical and chemical methods, and finally achieve the purpose of harmless treatment or resource recovery.

[0021] In summary, this type of surface painting equipment for automobile trim panels can not only meet the needs of efficient production, but also effectively deal with the pollution problems generated in the production process and improve the utilization efficiency of water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 The present invention is a structural diagram of a surface painting device for an automobile decorative panel.

[0024] Figure 2 It is a right side structural diagram of a surface painting device for an automobile decorative panel of the present invention.

[0025] Figure 3 It is a left side structural diagram of a surface painting device for an automobile decorative panel of the present invention.

[0026] Figure 4 yes Figure 1 A partial enlargement of detail A.

[0027] Figure 5 It is a structural diagram of the control module of the present invention.

[0028] Figure 6 The present invention is a cross-sectional structural diagram of a surface painting device for an automobile decorative panel.

[0029] Figure 7 It is a cross-sectional structural diagram of the slag collecting trough of the present invention.

[0030] Figure 8 The present invention is a flow chart of a surface painting process for an automobile decorative panel.

[0031] Paint spraying module 101, water curtain module 102, water collecting trough 103, horizontal flow trough 104, gas generator 105, first air outlet plate 106, transition trough 107, slag collecting trough 108, joint 109, rotating rod 110, supporting rod 111, first driving unit 112, flow control valve 113, liquid level detector 114, control module 115, data acquisition unit 116, judgment unit 117, control unit 118, air outlet plate body 120, flow regulator 121, trough body 122, stirring structure 123, feeding structure 124, filtering structure 125, stirring rod 126, stirring blade 127, driving unit 128, filter screen 129, push plate 130, suction pipe 131, negative pressure pump 132. DETAILED DESCRIPTION

[0032] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0033] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the 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 cannot be understood as limiting the present invention. In addition, in the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0034] First embodiment

[0035] See also Figure 1 to Figure 7 The present invention provides a surface painting device for automobile decorative panels, comprising a paint spraying module 101, a water curtain module 102, a water collecting trough 103, a horizontal flow trough 104, a gas generator 105, a first air outlet plate 106, a transition trough 107 and a slag collecting trough 108, wherein the water curtain module 102 is arranged on one side of the paint spraying module 101, the water collecting trough 103 is arranged at the bottom of the water curtain module 102, and is used to collect waste water with paint, the horizontal flow trough 104 is arranged on one side of the water collecting trough 103, the first air outlet plate 106 has a plurality of air holes, the first air outlet plate 106 is arranged in the horizontal flow trough 104, the gas generator 105 is connected to the first air outlet plate 106, the transition trough 107 has a bottom water outlet pipe and a top water outlet pipe, and the slag collecting trough 108 is arranged on one side of the top water outlet pipe.

[0036] In this embodiment, the paint spraying module 101 performs surface paint spraying on the automobile trim. It is usually equipped with an advanced spray gun and a control system, which can adjust the paint spraying parameters according to different paint spraying requirements to achieve high-quality paint spraying effects. The water curtain module 102 is located on one side of the paint spraying module 101. Its main function is to form a barrier through water flow to capture excess paint particles and harmful gases generated during the painting process, thereby reducing the emission of these substances to the external environment and playing a role in purifying the air.

[0037] The water collecting tank 103 is arranged below the water curtain module 102, and is mainly used to collect wastewater containing paint after being filtered by the water curtain. By collecting these wastewaters in a centralized manner, they can be further processed. The advection tank 104 is located on one side of the water collecting tank 103. In this tank, the flow velocity of the water flow can be reduced to increase the mixing effect with the gas. The gas generator 105 is connected to the first gas outlet plate 106, and is used to generate and transport gas to the inside of the advection tank 104. By controlling the flow rate and pressure of the gas, tiny bubbles can be formed in the advection tank 104, which helps to separate the paint particles from the water body and improve the wastewater treatment efficiency. The first gas outlet plate 106 is installed in the advection tank 104, and is covered with tiny pores. When the gas is released through these pores, a large number of tiny bubbles will be formed in the water, and these bubbles can effectively absorb the paint particles in the water, promote them to float to the water surface, and facilitate subsequent removal.

[0038] The transition tank 107 has a design of a bottom outlet pipe and a top outlet pipe, and is a key component connecting the advection tank 104 and the slag collecting tank 108. Through this design, the treated clean water can be effectively discharged from the bottom, and the sewage containing more paint particles can be guided from the top to the slag collecting tank 108, thereby achieving clean and dirty separation. The slag collecting tank 108 is arranged on one side of the top outlet pipe, and is specifically used to collect the sewage containing a large number of paint particles flowing out from the top of the transition tank 107. Here, these sewage can be further treated by sedimentation or other physical and chemical methods, and finally achieve the purpose of harmless treatment or resource recovery.

[0039] In summary, this type of surface painting equipment for automobile trim panels can not only meet the needs of efficient production, but also effectively deal with the pollution problems generated in the production process and improve the utilization efficiency of water resources.

[0040] The first air outlet plate 106 includes a joint 109, a plurality of rotating rods 110, a support rod 111 and a first driving unit 112, the support rod 111 having a gas channel, the first driving unit 112 is connected to the support rod 111, the rotating rod 110 has a plurality of air outlet holes, the plurality of rotating rods 110 are fixed to the support rod 111, the air outlet holes are connected to the gas channel, the joint 109 is rotatably connected to the support rod 111, and is connected to the gas generator 105.

[0041] The joint 109 is not only rotatably connected to the support rod 111, but also directly connected to the gas generator 105. Through such a design, even if the support rod 111 needs to rotate during operation, a stable supply of gas can be guaranteed.

[0042] A plurality of rotating rods 110 are fixed on the supporting rod 111, and a plurality of air outlets are provided on each rotating rod 110. The design of the air outlets enables the gas to be evenly distributed in various areas of the advection groove 104, thereby more effectively promoting the floating of paint particles.

[0043] The support rod 111 serves as the skeleton of the entire first gas outlet plate 106. A gas channel is provided inside the support rod 111, and the channel is directly connected to the gas outlet holes on the rotating rod 110. The support rod 111 not only carries the rotating rod 110, but is also responsible for transmitting gas from the joint 109 to each gas outlet hole.

[0044] The first driving unit 112 connected to the support rod 111 is responsible for providing power to enable the support rod 111 to rotate at a predetermined speed and direction. This rotational motion helps to improve the diffusion effect of the gas in the water, thereby improving the treatment efficiency.

[0045] The top water outlet pipe and the slag collecting tank 108 have a height difference.

[0046] In order to ensure that the treated clean water and the wastewater containing paint particles can be effectively separated, a certain height difference is designed between the top outlet pipe and the slag collecting tank 108. This design uses gravity to allow the lighter clean water to be discharged from the bottom outlet pipe, while the heavier wastewater containing paint particles flows from the top outlet pipe into the slag collecting tank 108, thereby achieving clean and dirty separation.

[0047] A flow control valve 113 is provided on the bottom outlet pipe of the transition tank, and a liquid level detector 114 is provided near the top outlet pipe of the transition tank. The liquid level detector 114 is used to detect the liquid level height in the transition tank, and the control module 115 is used to control the flow of the flow control valve 113 based on the liquid level height.

[0048] The flow control valve 113 is arranged on the bottom water outlet pipe of the transition tank, and is used to adjust the water outlet flow rate to ensure the stability and efficiency of the filtering process.

[0049] The liquid level detector 114 is installed near the top outlet pipe of the transition tank to monitor the liquid level in the transition tank in real time. This function is very important for maintaining the pressure balance inside the transition tank and preventing overflow.

[0050] The control module 115 includes a data acquisition unit 116, a judgment unit 117 and a control unit 118. The data acquisition unit 116 is used to acquire liquid level height data; the judgment unit 117 is used to calculate the difference based on the liquid level height data and the target height data; the control unit 118 is used to control the opening of the flow control valve 113 according to the difference.

[0051] The data acquisition unit 116 collects the liquid level data provided by the liquid level detector 114. The judgment unit 117 compares the real-time collected liquid level data with the preset target height data and calculates the difference between the two. The control unit 118 automatically adjusts the opening of the flow control valve 113 according to the difference to maintain the liquid level in the transition tank within the set range. This ensures the continuity and stability of the filtration process and avoids poor treatment effects or equipment damage caused by excessively high or low liquid levels.

[0052] Through the above design, the painting equipment can not only efficiently complete the surface painting operation of the automobile trim panel, but also effectively treat the wastewater generated in the production process, achieving the purpose of environmental protection and resource conservation.

[0053] The surface painting equipment of the automobile trim panel further includes a second air outlet plate, which is arranged in the transition groove 107 .

[0054] In order to further optimize the wastewater treatment process, the surface painting equipment of the automobile trim panel also includes a second air outlet plate, which is arranged in the transition groove 107.

[0055] The second gas outlet plate includes a gas outlet plate body 120 and a flow regulator 121 . The flow regulator 121 is used to adjust the gas flow generated by the gas outlet plate body 120 .

[0056] The gas outlet plate body 120 is the main part of the second gas outlet plate, and is responsible for evenly distributing the gas into the wastewater in the transition tank 107. The gas outlet plate body 120 is provided with a plurality of gas outlet holes, and the design of these gas outlet holes allows the gas to enter the water in the form of tiny bubbles, thereby increasing the contact area between the bubbles and the wastewater, thereby enhancing the flotation effect, and further performing secondary treatment on the water entering the transition tank.

[0057] The flow regulator 121 is connected to the gas outlet plate body 120 and is used to accurately control the flow of the gas. The flow regulator 121 can adjust the flow of the gas according to actual needs to ensure that the generation rate and size of the bubbles meet the requirements of the best treatment effect. This not only improves the efficiency of wastewater treatment, but also reduces energy consumption.

[0058] The slag collecting tank 108 includes a tank body 122 , a stirring structure 123 , a feeding structure 124 and a filtering structure 125 . The stirring structure 123 is arranged in the tank body 122 , the filtering structure 125 is arranged at the bottom of the stirring structure 123 , and the feeding structure 124 is arranged on one side of the tank body 122 .

[0059] The tank body 122 is the main part of the slag tank 108, and is used to accommodate the wastewater containing paint particles flowing in from the top outlet pipe. The design of the tank body 122 should ensure sufficient capacity so that there is enough space for stirring and filtering operations during the treatment process. The stirring structure 123 is set in the tank body 122 to mix and disperse the paint particles in the wastewater, making it easier to filter and remove.

[0060] The feeding structure 124 is disposed on one side of the tank body 122 and is used to add chemical agents or flocculants into the tank body 122. These agents can help paint particles to agglomerate into larger particles, which are easier to filter and remove. The design of the feeding structure 124 should ensure that the agents can be evenly distributed in the sewage in the tank body 122.

[0061] The filtering structure 125 is disposed at the bottom of the stirring structure 123 to separate paint particles and other impurities in the treated sewage.

[0062] The stirring structure 123 includes a stirring rod 126 , a stirring blade 127 and a driving unit 128 . The stirring blade 127 is connected to the stirring rod 126 , and an output end of the driving unit 128 is connected to the stirring rod 126 .

[0063] The stirring rod 126 is the main shaft of the stirring structure 123 and is responsible for transmitting the driving force. The stirring blade 127 is connected to the stirring rod 126 and is used to generate a vortex in the water to fully suspend the paint particles. The driving unit 128 provides power, and its output end is connected to the stirring rod 126 to ensure that the stirring rod 126 and the stirring blade 127 can rotate continuously to achieve an effective mixing effect.

[0064] The filtering structure 125 includes a filter screen 129, a push plate 130, a suction pipe 131 and a negative pressure pump 132. The filter screen 129 is in the trough body 122, the push plate 130 is slidably arranged on the filter screen 129, the suction pipe 131 is arranged on one side of the filter screen 129, and the negative pressure pump 132 is connected to the suction pipe 131.

[0065] The filter screen 129 is installed in the tank body 122 to intercept and capture larger paint particles and other solid impurities. The push plate 130 is slidably set on the filter screen 129 to regularly clean the accumulation on the filter screen 129 to prevent the filter screen 129 from being blocked and ensure the continuity of the filtering effect. The suction pipe 131 is set on one side of the filter screen 129 to extract the filtered clean water from the tank body 122. The negative pressure pump 132 is connected to the suction pipe 131 to provide negative pressure to help extract the clean water from the tank body 122. The design of the negative pressure pump 132 should ensure sufficient suction capacity to ensure that the filtered water can be discharged quickly without affecting the subsequent treatment process.

[0066] Through the above design, the surface painting equipment of the automobile trim panel can not only efficiently complete the painting operation, but also effectively treat the wastewater generated during the production process. The introduction of the second air outlet plate and the slag collecting tank 108 further improves the efficiency and quality of wastewater treatment.

[0067] Second embodiment

[0068] See also Figure 8 The present invention also provides a surface painting process for an automobile decorative panel, comprising:

[0069] S201 The paint spraying module 101 sprays paint on the car trim, and the water curtain module 102 generates a water curtain to absorb excess paint;

[0070] First, the paint spraying module 101 sprays paint on the surface of the automobile trim panel. The paint spraying module 101 is usually equipped with an advanced spray gun and a control system, which can adjust the paint spraying parameters according to different paint spraying requirements to ensure the uniformity and adhesion of the paint spraying.

[0071] During the painting process, the water curtain module 102 generates a continuous water curtain on one side of the painting module 101. The main function of this water curtain is to capture the excess paint and harmful gases generated during the painting process and reduce the emission of these substances to the external environment. The water curtain effectively absorbs and captures paint particles in the air through the flow of water and brings them into the water.

[0072] S202 The water collecting tank 103 collects the waste water absorbed by the paint and allows the waste water to pass through the advection tank 104;

[0073] The water collection tank 103 at the bottom of the water curtain module 102 is responsible for collecting waste water containing paint. The design of the water collection tank 103 should ensure sufficient capacity so that waste water can be continuously collected during the painting process to avoid overflow.

[0074] The advection trough 104 on one side of the water collection tank 103 is used to preliminarily process the collected wastewater. When the wastewater passes through the advection trough 104, due to the slow water flow speed, the paint particles can settle under the action of gravity, and the solid-liquid separation is preliminarily achieved. The design of the advection trough 104 should ensure a smooth water flow to avoid turbulence affecting the sedimentation effect.

[0075] S203: Start the gas generator 105, and the first gas outlet plate 106 generates bubbles which fully contact with the wastewater in the advection trough 104, so that the paint particles float up under the action of the bubbles;

[0076] The gas generator 105 is started to generate gas and transport it to the first gas outlet plate 106 through a pipeline. The gas generator 105 should have a stable gas output capability to ensure the continuous generation of bubbles.

[0077] The first air outlet plate 106 is installed in the advection trough 104, and releases gas through multiple air holes to form a large number of tiny bubbles. These bubbles come into contact with paint particles in the wastewater during the rising process, and bring the paint particles to the surface of the water through flotation. The design of the first air outlet plate 106 should ensure the uniform distribution of bubbles and improve the flotation effect.

[0078] S204 wastewater enters the transition tank, the upper wastewater with paint particles enters the slag collecting tank 108, and the lower wastewater is reused by the water curtain module 102.

[0079] The wastewater after flotation treatment enters the transition tank. The design of the transition tank should ensure that the wastewater can flow in smoothly and further solid-liquid separation is performed in the tank. The wastewater in the upper layer of the transition tank contains more paint particles, and this part of the wastewater flows into the slag collecting tank 108 through the top outlet pipe. The slag collecting tank 108 is provided with a stirring structure 123 and a filtering structure 125 for further processing and separation of paint particles.

[0080] The wastewater in the lower layer of the transition tank is relatively clean, and this part of the wastewater returns to the water curtain module 102 through the bottom outlet pipe for recycling. The flow control valve 113 and the liquid level detector 114 ensure that the flow and liquid level of the wastewater are within a reasonable range to ensure the stable operation of the system.

[0081] Through the above process steps, the surface painting of the automobile trim can not only achieve high-quality painting effects, but also effectively treat the wastewater generated during the painting process and reduce environmental pollution. The entire process flow is reasonably designed and each step is closely connected, ensuring the efficiency and environmental protection of the painting operation. These measures reflect the high attention paid to environmental protection and resource conservation in modern industrial production.

[0082] What is disclosed above is only a preferred embodiment of the present invention, and it certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope of the invention.

Claims

1. A surface painting device for automobile trim, comprising a painting module and a water curtain module, wherein the water curtain module is arranged on one side of the painting module, characterized in that: It also includes a water collecting trough, a horizontal flow trough, a gas generator, a first air outlet plate, a transition trough and a slag collecting trough. The water collecting trough is arranged at the bottom of the water curtain module to collect wastewater containing paint. The horizontal flow trough is arranged on one side of the water collecting trough. The first air outlet plate has a plurality of air holes. The first air outlet plate is arranged in the horizontal flow trough. The gas generator is connected to the first air outlet plate. The transition trough has a bottom water outlet pipe and a top water outlet pipe. The slag collecting trough is arranged on one side of the top water outlet pipe.

2. The surface painting equipment for automobile trim panels according to claim 1, characterized in that: The first air outlet plate includes a joint, a plurality of rotating rods, a support rod and a first driving unit, the support rod has a gas channel, the first driving unit is connected to the support rod, the rotating rod has a plurality of air outlet holes, a plurality of rotating rods are fixed to the support rod, the air outlet holes are connected to the gas channel, the joint is rotatably connected to the support rod, and is connected to a gas generator.

3. The surface painting equipment for automobile trim as claimed in claim 2, characterized in that: The top water outlet pipe and the slag collecting trough have a height difference.

4. The surface painting equipment for automobile trim as claimed in claim 3, characterized in that: A flow control valve is arranged on the bottom water outlet pipe of the transition trough, and a liquid level detector is arranged near the top water outlet pipe of the transition trough. The liquid level detector is used to detect the liquid level height in the transition trough, and the control module is used to control the flow of the flow control valve based on the liquid level height.

5. The surface painting equipment for automobile trim as claimed in claim 4, characterized in that: The control module includes a data acquisition unit, a judgment unit and a control unit. The data acquisition unit is used to acquire liquid level height data; the judgment unit is used to calculate the difference based on the liquid level height data and the target height data; the control unit is used to control the opening of the flow control valve according to the difference.

6. The surface painting equipment for automobile trim as claimed in claim 5, characterized in that: The surface painting equipment of the automobile trim panel also includes a second air outlet plate, and the second air outlet plate is arranged in the transition groove.

7. The surface painting equipment for automobile trim as claimed in claim 6, characterized in that: The second gas outlet plate includes a gas outlet plate body and a flow regulator, and the flow regulator is used to adjust the gas flow generated by the gas outlet plate body.

8. The surface painting equipment for automobile trim as claimed in claim 7, characterized in that: The slag collecting tank comprises a tank body, a stirring structure, a feeding structure and a filtering structure. The stirring structure is arranged in the tank body, the filtering structure is arranged at the bottom of the stirring structure, and the feeding structure is arranged at one side of the tank body.

9. A surface painting process for automobile decorative panels, using the surface painting equipment for automobile decorative panels according to any one of claims 1 to 8, It is characterized in that It includes: the paint spraying module sprays paint on the car trim, and the water curtain module produces a water curtain to absorb excess paint; The sump collects the waste water that absorbs the paint and passes the waste water through the advection trough; The gas generator is started, and the bubbles generated by the first gas outlet plate are fully contacted with the wastewater in the advection trough, so that the paint particles float up under the action of the bubbles; The wastewater enters the transition tank, the upper layer of wastewater with paint particles enters the slag collecting tank, and the lower layer of wastewater is reused in the water curtain module.

Images