Powder coating uniform mixing equipment and process

Abstract

The invention belongs to the technical field of powder coating stirring, and provides powder coating uniform mixing equipment and a process, the powder coating uniform mixing equipment comprises a shell, the shell is communicated with a feeding groove and a discharging groove, the top surface of the shell is fixedly connected with a sleeve, the bottom of the sleeve is rotatably connected with a vertical pipe, and the vertical pipe is communicated with the sleeve; the position, close to the bottom, of the vertical pipe is communicated with a plurality of connecting pipes, each connecting pipe is communicated with a mixing mechanism, the mixing mechanisms can mix and stir powder coating and a solvent in the shell, and a driving mechanism capable of driving the vertical pipe to rotate in a reciprocating mode is arranged on the bottom face of the shell. According to the paint mixing device, the vertical pipe drives all the mixing mechanisms to stir and mix a solvent and a powder coating, and the guide plates which are obliquely arranged on the two sides of the frame body can mix paint at different heights in the shell, so that the mixing uniformity of the paint is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of powder coating stirring, and in particular relates to a powder coating mixing device and process. Background Art

[0002] The mixing uniformity of powder coatings is crucial to the performance and coating effect of the coating. Evenly mixed powder coatings can ensure that the coating has a uniform appearance and good performance. The most common method of mixing powder coatings is mechanical mixing, which can be divided into dry mixing and wet mixing. Liquid media such as alcohol, gasoline, acetone, etc. can be added during the wet mixing process.

[0003] Powder coatings form paint after mixing. Some larger paint particles in the powder coating are difficult to dissolve during the mixing process. These paint particles in the paint will affect the performance of the paint. However, since the paint has a certain viscosity, the paint particles in the paint are not easy to be collected, filtered and crushed.

[0004] Existing powder coating mixing equipment generally pours the paint into a filtering and crushing mechanism for further processing after mixing. During this process, the paint is easily adhered to the filtering and crushing mechanism when it is collected and transferred to the filtering and crushing mechanism, which not only causes a large amount of waste material, but also wastes time and effort. Summary of the invention

[0005] The purpose of the present invention is to provide a powder coating mixing device and process, aiming to solve the technical problem in the prior art that the paint is easily adhered to the filtering and crushing mechanism when being collected and transferred to the filtering and crushing mechanism, which not only causes a large amount of waste material but also wastes time and effort.

[0006] The present invention is implemented as follows: a powder coating mixing device comprises a housing, the housing is connected with a feed trough and a discharge trough, a sleeve is fixedly connected to the top surface of the housing, a vertical pipe is rotatably connected to the bottom of the sleeve, and the vertical pipe is connected with the sleeve; The vertical pipe is connected to a plurality of connecting pipes near the bottom, each connecting pipe is connected to a mixing mechanism, and the mixing mechanism can mix and stir the powder coating and solvent in the shell. The bottom surface of the shell is provided with a driving mechanism that can drive the vertical pipe to reciprocate. When the driving mechanism rotates forward, the mixing mechanism can screen the coating particles in the solvent according to the volume size. When the driving mechanism rotates reversely, the external solvent can flush the screened coating particles in the mixing mechanism into the vertical pipe. A drainage tube is also fixed at the bottom of the sleeve, and the drainage tube is connected to a crushing box. A piston assembly is arranged in the sleeve, and a one-way flow guide assembly is arranged between the vertical pipe, the sleeve and the crushing box. The piston assembly can transport the paint in the vertical pipe to the crushing box through the sleeve by reciprocating vertical motion; The crushing box is provided with a crushing mechanism capable of crushing powdered paint, a discharge port is provided on the end of the drainage tube away from the crushing box, and a filtering mechanism is provided in the drainage tube. The filtering mechanism can perform multiple screening on paint particles in the paint, and at the same time, the filtering mechanism can return the screened paint particles to the crushing box, and the filtering mechanism can also remove the paint particles adhering to the discharge port by continuous vibration.

[0007] Further technical solution: the filtering mechanism includes a second motor, a sleeve, a filter screen, a drainage plate and a scraper; The main body of the No. 2 motor is fixedly connected to one end of the drainage tube, and the output shaft of the No. 2 motor is inserted into the drainage tube. The output shaft of the No. 2 motor is slidably connected with a sleeve along the length direction, and the sleeve is spirally provided with a filter screen plate and a drainage plate. The filter screen plate is arranged on the side close to the crushing box, and a scraper is fixed at one end of the drainage plate. The scraper contacts the inner wall of the drainage tube, and the scraper is arranged on the upper side of the discharge port. One end of the drainage tube is rotatably connected with a rotating plate, and a No. 2 spring is connected between the rotating plate and the scraper.

[0008] Further technical solution: The filtering mechanism also includes a transmission assembly, which includes a fixed toothed disc and a rotating toothed disc, the fixed toothed disc is fixedly connected to the inner end surface of the drainage tube, the rotating toothed disc is fixedly connected to the scraper, and the fixed toothed disc is meshed with the rotating toothed disc.

[0009] Further technical solution: the mixing mechanism includes a frame, a guide plate, a screen, a baffle and a spring No. 1; The frame is fixedly connected to the connecting pipe, and the frame is communicated with the connecting pipe. Both side end surfaces of the frame are obliquely provided with a plurality of guide plates, and all the guide plates are kept parallel. One side end surface of the frame is provided with a screen, and the guide plate on the side of the screen is inclined upward. The other side end surface of the frame is provided with an opening. A baffle is slidably connected in the frame, and a No. 1 spring is connected between the baffle and the inner wall of the frame, and the baffle can seal the opening of one side end surface of the frame.

[0010] Further technical solution: The piston assembly includes an electric rod and a piston plate, the electric rod is fixedly connected to the upper end surface of the sleeve, the telescopic end of the electric rod is fixedly connected to the piston plate, and the piston plate is slidably and sealingly connected to the inner wall of the electric rod.

[0011] Further technical solution: the diversion assembly includes a No. 1 check valve, an annular conduit, a No. 2 check valve and a connecting pipe; A No. 1 one-way valve is provided at the interface between the vertical pipe and the sleeve, and the No. 1 one-way valve is unidirectionally conducted into the sleeve. An annular conduit is provided in an annular shape at the bottom of the sleeve, and the annular conduit is connected to the crushing box through a connecting pipe. The annular conduit is connected to the inside of the sleeve via a plurality of No. 2 one-way valves, and the No. 2 one-way valves are all unidirectionally conducted into the annular conduit.

[0012] Further technical solution: the rolling mechanism includes a partition, a third motor and a pressure roller; A plurality of partitions are arranged at equal vertical intervals in the crushing box, the No. 3 motor is fixedly connected to the upper end surface of the crushing box, a plurality of pressure rollers are fixedly connected to the output shaft of the No. 3 motor at equal vertical intervals, and each partition is vertically separated between two rows of pressure rollers.

[0013] Further technical solution: the driving mechanism includes a No. 1 motor, a driving wheel and a driven wheel; The No. 1 motor is fixedly connected to the bottom surface of the shell, the output shaft of the No. 1 motor is fixedly connected to a driving wheel, the bottom of the vertical pipe is fixedly connected to a driven wheel, and the driven wheel is meshed with the driving wheel.

[0014] A powder coating mixing process, applied to any of the above-mentioned powder coating mixing equipment, comprises the following steps: S1: Powder coating and solvent are put into the housing from the feed tank, and then the driving mechanism is started, the driving mechanism drives the vertical pipe to rotate, and the vertical pipe drives all mixing mechanisms to stir and mix the solvent and powder coating; when the driving mechanism rotates forward, the mixing mechanism can screen the coating particles in the solvent according to the volume size, and when the driving mechanism rotates reversely, the external solvent can flush the screened coating particles in the mixing mechanism into the vertical pipe; S2: The piston assembly transports the paint in the vertical pipe to the crushing box through the sleeve by reciprocating vertical motion; in the crushing box, the crushing mechanism crushes and crushes the powder coating with too large volume in the paint; S3: The paint passes through the drainage tube from the crushing box, and the filtering mechanism in the drainage tube performs multiple screening on the paint particles in the paint. At the same time, the filtering mechanism can send the screened paint particles back to the crushing box for further crushing, and then the paint is redispersed into the outer shell through the discharge port for mixing.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. When the side of the frame opening is the flow-facing surface, under the pressure of the paint, the baffle slides in the frame and compresses the No. 1 spring, and the opening of the frame is unsealed. At this time, the external paint enters the frame, and then the larger paint particles in the frame are filtered by the screen and remain in the frame; then the vertical pipe drives all the frames to rotate in the opposite direction, and at this time the screen becomes the flow-facing surface. Under the pressure of the paint and the No. 1 spring, the baffle seals the end face of one side of the frame, and the external paint washes the screen to prevent the paint particles inside the frame from clogging the screen. The paint entering the frame flows into the vertical pipe together with the larger paint particles filtered out of the frame; 2. The guide plates arranged obliquely on both sides of the frame can mix the paints at different heights in the shell, increasing the mixing uniformity of the paints; and under the guidance of the guide plates, the external paint washes the screen obliquely downward, and the paint particles on the inner side of the screen can be washed into the connecting pipe, and the paint particles in the frame and on the screen can be effectively introduced into the vertical pipe; 3. When the paint entering the frame and the larger paint particles filtered out of the frame flow into the vertical pipe, the electric rod drives the piston plate to move upward, so that the air pressure in the lower cavity of the sleeve is reduced. The negative pressure of the atmosphere in the sleeve can increase the upward conveying power of the paint in the vertical pipe; 4. On the one hand, the reciprocating vibration of the scraper and the guide plate can scrape off the residual paint at the discharge port to prevent the discharge port from being blocked by the residual paint. At the same time, the filter plate and the guide plate can scrape off the paint on the inner wall of the drainage tube. The filter plate can also avoid its own mesh blockage under the action of vibration. On the other hand, under the reciprocating vibration of the scraper, the intercepting area of ​​the discharge port is constantly changing. At the same time, under the guiding effect of the guide plate, the discharge direction of the paint at the discharge port can be constantly changed, thereby increasing the mixing uniformity of the paint in the outer shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 It is a schematic diagram of the internal structure of the shell in the present invention.

[0018] Figure 3 It is a structural schematic diagram of the mixing mechanism in the present invention.

[0019] Figure 4 It is a connection diagram of the sleeve, the crushing box and the drainage tube in the present invention.

[0020] Figure 5 It is a schematic diagram of the internal structure of the sleeve in the present invention.

[0021] Figure 6 It is a schematic diagram of the internal structure of the drainage tube in the present invention.

[0022] Figure 7 It is a structural schematic diagram of the rolling mechanism in the present invention.

[0023] Figure 8 It is a structural schematic diagram of the transmission component in the present invention.

[0024] In the attached drawings: 1, housing; 2, sleeve; 3, vertical pipe; 4, driving mechanism; 41, No. 1 motor; 42, driving wheel; 43, driven wheel; 5, mixing mechanism; 51, frame; 52, guide plate; 53, screen; 54, baffle; 55, No. 1 spring; 6, piston assembly; 61, electric rod; 62, piston plate; 7, flow guide assembly; 71, No. 1 one-way valve; 72, annular conduit; 73, No. 2 one-way valve; 74, connecting pipe; 8 , filtering mechanism; 81, No. 2 motor; 82, sleeve; 83, filter screen; 84, drainage plate; 85, scraper; 86, No. 2 spring; 87, transmission assembly; 871, fixed gear plate; 872, rotating gear plate; 88, rotating plate; 9, rolling mechanism; 91, partition; 92, No. 3 motor; 93, pressure roller; 10, connecting pipe; 11, feed trough; 12, discharge trough; 13, crushing box; 14, drainage tube; 15, discharge port. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0026] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0027] like Figure 1-Figure 8 As shown, a powder coating mixing device provided by the present invention comprises a housing 1, the housing 1 is connected to a feed trough 11 and a discharge trough 12, a sleeve 2 is fixedly connected to the top surface of the housing 1, a vertical pipe 3 is rotatably connected to the bottom of the sleeve 2, and the vertical pipe 3 is connected to the sleeve 2; The vertical pipe 3 is connected to a plurality of connecting pipes 10 near the bottom, and each connecting pipe 10 is connected to a mixing mechanism 5, and the mixing mechanism 5 can mix and stir the powder coating and solvent in the housing 1. The bottom surface of the housing 1 is provided with a driving mechanism 4 that can drive the vertical pipe 3 to reciprocate. When the driving mechanism 4 rotates forward, the mixing mechanism 5 can screen the coating particles in the solvent according to the volume size. When the driving mechanism 4 rotates reversely, the external solvent can flush the screened coating particles in the mixing mechanism 5 into the vertical pipe 3. A drainage tube 14 is also fixed at the bottom of the sleeve 2, and the drainage tube 14 is connected to the crushing box 13. A piston assembly 6 is arranged in the sleeve 2, and a unidirectional flow guide assembly 7 is arranged between the vertical pipe 3, the sleeve 2 and the crushing box 13. The piston assembly 6 can transport the paint in the vertical pipe 3 to the crushing box 13 through the sleeve 2 by reciprocating vertical motion; The crushing box 13 is provided with a crushing mechanism 9 capable of crushing powdered paint, and a discharge port 15 is provided on the end of the drainage tube 14 away from the crushing box 13. The drainage tube 14 is provided with a filtering mechanism 8, and the filtering mechanism 8 can perform multiple screening on the paint particles in the paint, and at the same time, the filtering mechanism 8 can return the screened paint particles to the crushing box 13, and the filtering mechanism 8 can also remove the paint particles adhering to the discharge port 15 by continuous vibration.

[0028] In this embodiment, powder coating and solvent are put into the housing 1 from the feed tank 11, and then the driving mechanism 4 is started, the driving mechanism 4 drives the vertical pipe 3 to rotate, and the vertical pipe 3 drives all the mixing mechanisms 5 to stir and mix the solvent and powder coating. In this process, when the driving mechanism 4 rotates forward, the mixing mechanism 5 can screen the coating particles in the solvent according to the volume size, and when the driving mechanism 4 rotates reversely, the external solvent can flush the screened coating particles in the mixing mechanism 5 into the vertical pipe 3, and the piston assembly 6 transports the paint (a mixture of solvent and powder coating) in the vertical pipe 3 through the sleeve 2 to the crushing box 13 by reciprocating vertical motion; in the crushing box 13, the crushing mechanism 9 crushes and crushes the powder coating with too large volume in the paint; After that, the paint passes through the drainage tube 14, and the filter mechanism 8 in the drainage tube 14 performs multiple screening on the paint particles in the paint. At the same time, the filter mechanism 8 can send the screened paint particles back to the crushing box 13 for further crushing, and then the paint is redispersed into the housing 1 through the discharge port 15 for mixing; Since the paint mixed with the solvent is adhesive, it is easy to cause blockage at the discharge port 15. At this time, the filter mechanism 8 can also remove the paint particles adhered to the discharge port 15 by continuous vibration.

[0029] like Figure 6 and Figure 7 As shown, a powder coating mixing device provided by the present invention, the filtering mechanism 8 includes a second motor 81, a sleeve 82, a filter screen plate 83, a guide plate 84 and a scraper 85; The main body of the No. 2 motor 81 is fixedly connected to one end of the drainage tube 14, and the output shaft of the No. 2 motor 81 is inserted into the drainage tube 14. The output shaft of the No. 2 motor 81 is slidably connected with a sleeve 82 along the length direction. The outside of the sleeve 82 is spirally provided with a filter plate 83 and a drainage plate 84 in sequence. The filter plate 83 is arranged on the side close to the crushing box 13. A scraper 85 is fixed to one end of the drainage plate 84. The scraper 85 contacts the inner wall of the drainage tube 14. The scraper 85 is arranged on the upper side of the discharge port 15. One end of the drainage tube 14 is rotatably connected with a rotating plate 88, and a No. 2 spring 86 is connected between the rotating plate 88 and the scraper 85.

[0030] In this embodiment, the No. 2 motor 81 is started, and the No. 2 motor 81 drives the sleeve 82 to rotate, and the sleeve 82 drives the filter screen 83 and the guide plate 84 to rotate. During this process, the guide plate 84 filters the paint entering the guide tube 14, and the larger powder coating in the paint is filtered and pushed back to the crushing box 13 for further crushing. After that, under the guidance of the guide plate 84, the paint flows back to the outer shell 1 through the discharge port 15 for further mixing.

[0031] like Figure 7 As shown, a powder coating mixing device provided by the present invention, the filtering mechanism 8 also includes a transmission assembly 87, the transmission assembly 87 includes a fixed toothed disc 871 and a rotating toothed disc 872, the fixed toothed disc 871 is fixedly connected to the inner end surface of the drainage tube 14, the rotating toothed disc 872 is fixedly connected to the scraper 85, and the fixed toothed disc 871 is meshed with the rotating toothed disc 872.

[0032] In this embodiment, the sleeve 82 drives the scraper 85 to rotate synchronously, and the scraper 85 drives the rotating toothed disc 872 connected thereto to rotate synchronously. Under the guiding action of the fixed toothed disc 871 and the elastic action of the second spring 86, the rotating toothed disc 872 drives the sleeve 82 through the scraper 85, and the sleeve 82 slides back and forth along the output shaft of the second motor 81, and the scraper 85, the guide plate 84 and the filter screen plate 83 vibrate back and forth. On the one hand, the reciprocating vibration of the scraper 85 and the guide plate 84 can scrape off the residual paint at the discharge port 15 to prevent the discharge port 15 from being blocked by the residual paint. At the same time, the filter screen 83 and the guide plate 84 can scrape off the paint on the inner wall of the drainage tube 14. The filter screen 83 can also avoid its own mesh blockage under the action of vibration. On the other hand, under the reciprocating vibration of the scraper 85, the intercepting area of ​​the discharge port 15 is constantly changing. At the same time, under the guiding action of the guide plate 84, the discharge direction of the paint at the discharge port 15 can be constantly changed, thereby increasing the mixing uniformity of the paint in the outer shell 1.

[0033] like Figure 3As shown, a powder coating mixing device provided by the present invention, the mixing mechanism 5 includes a frame 51, a guide plate 52, a screen 53, a baffle 54 and a No. 1 spring 55; The frame 51 is fixedly connected to the connecting pipe 10, and the frame 51 is communicated with the connecting pipe 10. Both side end surfaces of the frame 51 are obliquely provided with a plurality of guide plates 52, and all the guide plates 52 are kept parallel. A screen 53 is provided on one side end surface of the frame 51, and the guide plate 52 on one side of the screen 53 is inclined upward. An opening is provided on the other side end surface of the frame 51. A baffle 54 is slidably connected in the frame 51, and a No. 1 spring 55 is connected between the baffle 54 and the inner wall of the frame 51, and the baffle 54 can seal the opening on one side end surface of the frame 51.

[0034] In this embodiment, when the vertical pipe 3 drives all the frames 51 to rotate back and forth, when the side of the opening of the frame 51 is the front flow surface, under the pressure of the paint, the baffle 54 slides in the frame 51 and compresses the No. 1 spring 55, and the opening of the frame 51 is unsealed, and the external paint enters the frame 51, and then the larger paint particles in the frame 51 are filtered by the screen 53 and remain in the frame 51; then the vertical pipe 3 drives all the frames 51 to rotate in the opposite direction, and the screen 53 becomes the front flow surface. Under the pressure of the paint and the No. 1 spring 55, the baffle 54 seals the end surface of one side of the frame 51, and the external paint washes the screen 53 to prevent the paint particles inside the frame 51 from clogging the screen 53, and the paint entering the frame 51 flows into the vertical pipe 3 together with the larger paint particles filtered out of the frame 51; During this process, the guide plates 52 obliquely arranged on both sides of the frame 51 can mix the paints at different heights in the outer shell 1, thereby increasing the mixing uniformity of the paints; and under the guiding action of the guide plates 52, the external paint washes the screen 53 obliquely downward, and the paint particles on the screen 53 on the inner side of the frame 51 can be washed into the connecting pipe 10, and the paint particles in the frame 51 and on the screen 53 can be effectively introduced into the vertical pipe 3.

[0035] like Figure 5 As shown, a powder coating mixing device provided by the present invention, the piston assembly 6 includes an electric rod 61 and a piston plate 62, the electric rod 61 is fixedly connected to the upper end surface of the sleeve 2, the telescopic end of the electric rod 61 is fixedly connected to the piston plate 62, and the piston plate 62 is slidably and sealedly connected to the inner wall of the electric rod 61.

[0036] In this embodiment, the electric rod 61 is started, and the electric rod 61 drives the piston plate 62 to slide vertically in the sleeve 2. With the cooperation of the guide assembly 7, the paint in the vertical pipe 3 enters the sleeve 2 and is then introduced into the crushing box 13 from the sleeve 2.

[0037] like Figure 4 and Figure 5 As shown, a powder coating mixing device provided by the present invention, the flow guide component 7 includes a first check valve 71, an annular conduit 72, a second check valve 73 and a connecting pipe 74; A No. 1 one-way valve 71 is provided at the interface between the vertical pipe 3 and the sleeve 2, and the No. 1 one-way valve 71 is unidirectionally conducted into the sleeve 2. An annular conduit 72 is provided in an annular shape at the bottom of the sleeve 2, and the annular conduit 72 is communicated with the crushing box 13 through a connecting pipe 74. The annular conduit 72 is communicated with the inside of the sleeve 2 via a plurality of No. 2 one-way valves 73, and the No. 2 one-way valves 73 are all unidirectionally conducted into the annular conduit 72.

[0038] In this embodiment, when the paint entering the frame 51 flows into the vertical pipe 3 together with the larger paint particles filtered out of the frame 51, the electric rod 61 drives the piston plate 62 to move upward, so that the air pressure in the lower cavity of the sleeve 2 is reduced. The negative pressure of the atmosphere in the sleeve 2 can increase the upward conveying power of the paint in the vertical pipe 3. At this time, the No. 1 one-way valve 71 is turned on under the action of pressure. When all the paint enters the sleeve 2, the electric rod 61 drives the piston plate 62 to move downward, and all the No. 2 one-way valves 73 are turned on, and the paint enters the crushing box 13 through the No. 2 one-way valve 73.

[0039] like Figure 8 As shown, a powder coating mixing device provided by the present invention, the rolling mechanism 9 includes a partition 91, a third motor 92 and a pressure roller 93; A plurality of partitions 91 are vertically evenly spaced in the crushing box 13, the third motor 92 is fixedly connected to the upper end surface of the crushing box 13, and a plurality of pressure rollers 93 are vertically evenly fixedly connected to the output shaft of the third motor 92, and each partition 91 is vertically separated between two rows of pressure rollers 93.

[0040] In this embodiment, the third motor 92 is started, and the output shaft of the third motor 92 drives all the pressure rollers 93 to perform circular motion. All the pressure rollers 93 respectively crush the paint particles on each partition 91, and the paint flows to the drainage tube 14 through the gap between the pressure rollers 93 and the partitions 91.

[0041] like Figure 1 As shown, a powder coating mixing device provided by the present invention, the driving mechanism 4 includes a first motor 41, a driving wheel 42 and a driven wheel 43; The first motor 41 is fixedly connected to the bottom surface of the housing 1 , the output shaft of the first motor 41 is fixedly connected to a driving wheel 42 , the bottom of the vertical pipe 3 is fixedly connected to a driven wheel 43 , and the driven wheel 43 meshes with the driving wheel 42 .

[0042] In this embodiment, the first motor 41 is started, the first motor 41 drives the driving wheel 42 to rotate, and the driving wheel 42 drives the vertical pipe 3 to reciprocate by meshing with the driven wheel 43.

[0043] A powder coating mixing process, applied to the powder coating mixing device described in the above embodiment, comprises the following steps: S1: Powder coating and solvent are put into the housing 1 from the feed tank 11, and then the driving mechanism 4 is started, the driving mechanism 4 drives the vertical pipe 3 to rotate, and the vertical pipe 3 drives all the frames 51 to stir and mix the solvent and powder coating; During this process, when the side of the opening of the frame 51 is the flow-facing surface, under the pressure of the paint, the baffle 54 slides in the frame 51 and compresses the No. 1 spring 55, and the opening of the frame 51 is unsealed, and the external paint enters the frame 51, and then the larger paint particles in the frame 51 are filtered by the screen 53 and remain in the frame 51; then the vertical pipe 3 drives all the frames 51 to rotate in the opposite direction, and the screen 53 becomes the flow-facing surface. Under the pressure of the paint and the No. 1 spring 55, the baffle 54 seals the end surface of one side of the frame 51, and the external paint washes the screen 53 to prevent the paint particles inside the frame 51 from clogging the screen 53, and the paint entering the frame 51 flows into the vertical pipe 3 together with the larger paint particles filtered out of the frame 51; S2: When the paint entering the frame 51 flows into the vertical pipe 3 together with the larger paint particles filtered out of the frame 51, the electric rod 61 drives the piston plate 62 to move upward, so that the air pressure in the lower cavity of the sleeve 2 is reduced, and the negative pressure of the atmosphere in the sleeve 2 can increase the upward conveying power of the paint in the vertical pipe 3. At this time, the No. 1 check valve 71 is turned on under the action of pressure. When all the paint enters the sleeve 2, the electric rod 61 drives the piston plate 62 to move downward, and all the No. 2 check valves 73 are turned on, and the paint enters the crushing box 13 through the No. 2 check valve 73; in the crushing box 13, the crushing mechanism 9 crushes and crushes the powder coating with too large volume in the paint; S3: After that, the paint passes through the drainage tube 14, and the second motor 81 drives the sleeve 82 to rotate, and the sleeve 82 drives the filter screen 83 and the drainage plate 84 to rotate. In this process, the drainage plate 84 filters the paint entering the drainage tube 14, and the larger powder coating in the paint is filtered and pushed back to the crushing box 13 for further crushing. Then, under the guidance of the drainage plate 84, the paint flows back to the housing 1 through the discharge port 15 for further mixing; the sleeve 82 drives the scraper 85 to rotate synchronously, and the scraper 85 drives the connected rotating toothed disc 872 to rotate synchronously. Under the guidance of the fixed toothed disc 871 and the elastic action of the second spring 86, the rotating toothed disc 872 drives the sleeve 82 to slide back and forth along the output shaft of the second motor 81 through the scraper 85, and the scraper 85, together with the drainage plate 84 and the filter screen 83, reciprocate and vibrate; On the one hand, the reciprocating vibration of the scraper 85 and the guide plate 84 can scrape off the residual paint at the discharge port 15 to prevent the discharge port 15 from being blocked by the residual paint. At the same time, the filter screen 83 and the guide plate 84 can scrape off the paint on the inner wall of the drainage tube 14. The filter screen 83 can also avoid its own mesh blockage under the action of vibration. On the other hand, under the reciprocating vibration of the scraper 85, the intercepting area of ​​the discharge port 15 is constantly changing. At the same time, under the guiding action of the guide plate 84, the discharge direction of the paint at the discharge port 15 can be constantly changed, thereby increasing the mixing uniformity of the paint in the outer shell 1.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0045] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A powder coating mixing device, comprising a housing (1), characterized in that: The top surface of the housing (1) is fixedly connected to a sleeve (2), the bottom of the sleeve (2) is rotatably connected to a vertical pipe (3), and the vertical pipe (3) is in communication with the sleeve (2); The vertical tube (3) is connected to a plurality of connecting tubes (10) near the bottom, each connecting tube (10) being connected to a mixing mechanism (5), the mixing mechanism (5) being capable of mixing and stirring the powder coating and the solvent in the outer shell (1), the bottom surface of the outer shell (1) being provided with a driving mechanism (4) capable of driving the vertical tube (3) to reciprocate, when the driving mechanism (4) rotates in the forward direction, the mixing mechanism (5) is capable of screening the coating particles in the solvent according to their volume, and when the driving mechanism (4) rotates in the reverse direction, the external solvent is capable of flushing the screened coating particles in the mixing mechanism (5) into the vertical tube (3); A drainage tube (14) is also fixed to the bottom of the sleeve (2), and the drainage tube (14) is connected to a crushing box (13). A piston assembly (6) is provided in the sleeve (2), and a unidirectional drainage assembly (7) is provided between the vertical pipe (3), the sleeve (2) and the crushing box (13). The piston assembly (6) can transport the paint in the vertical pipe (3) through the sleeve (2) to the crushing box (13) by means of reciprocating vertical motion; The crushing box (13) is provided with a crushing mechanism (9) capable of crushing powdered paint, and an outlet (15) is provided on the drainage tube (14) at one end away from the crushing box (13). The drainage tube (14) is provided with a filtering mechanism (8), and the filtering mechanism (8) is capable of multiple screening of paint particles in the paint. At the same time, the filtering mechanism (8) is capable of returning the screened paint particles to the crushing box (13), and the filtering mechanism (8) is also capable of removing paint particles adhering to the outlet (15) by continuous vibration.

2. The powder coating mixing equipment according to claim 1, characterized in that: The filtering mechanism (8) comprises a second motor (81), a sleeve (82), a filter screen (83), a guide plate (84) and a scraper (85); The main body of the No. 2 motor (81) is fixedly connected to one end of the drainage tube (14); the output shaft of the No. 2 motor (81) is inserted into the drainage tube (14); the output shaft of the No. 2 motor (81) is slidably connected to a sleeve (82) along the length direction; the sleeve (82) is spirally provided with a filter screen (83) and a drainage plate (84); the filter screen (83) is arranged on a side close to the crushing box (13); a scraper (85) is fixed to one end of the drainage plate (84); the scraper (85) contacts the inner wall of the drainage tube (14); the scraper (85) is arranged on the upper side of the discharge port (15); one end of the drainage tube (14) is rotatably connected to a rotating plate (88); a No. 2 spring (86) is connected between the rotating plate (88) and the scraper (85).

3. The powder coating mixing device according to claim 2, characterized in that: The filtering mechanism (8) further comprises a transmission assembly (87), the transmission assembly (87) comprising a fixed toothed disc (871) and a rotating toothed disc (872), the fixed toothed disc (871) being fixedly connected to the inner end surface of the drainage cylinder (14), the rotating toothed disc (872) being fixedly connected to the scraper (85), and the fixed toothed disc (871) meshes with the rotating toothed disc (872).

4. The powder coating mixing device according to claim 1, characterized in that: The mixing mechanism (5) comprises a frame (51), a guide plate (52), a screen (53), a baffle (54) and a first spring (55); The frame (51) is fixedly connected to the connecting pipe (10), and the frame (51) is in communication with the connecting pipe (10). Both side end surfaces of the frame (51) are provided with a plurality of guide plates (52) in an inclined manner, and all the guide plates (52) are kept parallel. A screen (53) is provided on one side of the end surface of the frame (51), and the guide plate (52) on the side of the screen (53) is inclined upward. An opening is provided on the other side of the end surface of the frame (51). A baffle (54) is slidably connected to the frame (51), and a first spring (55) is connected between the baffle (54) and the inner wall of the frame (51). The baffle (54) can seal the opening on one side of the end surface of the frame (51).

5. The powder coating mixing device according to claim 1, characterized in that: The piston assembly (6) comprises an electric rod (61) and a piston plate (62); the electric rod (61) is fixedly connected to the upper end surface of the sleeve (2); the telescopic end of the electric rod (61) is fixedly connected to the piston plate (62); and the piston plate (62) is slidably and sealingly connected to the inner wall of the electric rod (61).

6. The powder coating mixing device according to claim 1, characterized in that: The flow guide assembly (7) comprises a first check valve (71), an annular conduit (72), a second check valve (73) and a connecting pipe (74); A first one-way valve (71) is provided at the interface between the vertical pipe (3) and the sleeve (2), and the first one-way valve (71) is unidirectionally connected to the sleeve (2). An annular conduit (72) is provided in the bottom ring of the sleeve (2), and the annular conduit (72) is connected to the crushing box (13) through a connecting pipe (74). The annular conduit (72) is connected to the inside of the sleeve (2) via a plurality of second one-way valves (73), and the second one-way valves (73) are all unidirectionally connected to the annular conduit (72).

7. The powder coating mixing device according to claim 1, characterized in that: The driving mechanism (4) comprises a first motor (41), a driving wheel (42) and a driven wheel (43); The first motor (41) is fixedly connected to the bottom surface of the housing (1); the output shaft of the first motor (41) is fixedly connected to a driving wheel (42); the bottom of the vertical pipe (3) is fixedly connected to a driven wheel (43); the driven wheel (43) is meshed with the driving wheel (42).

8. A powder coating mixing process, applied to the powder coating mixing equipment according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1: Powder coating and solvent are fed from a feed tank (11) into a housing (1), and then a driving mechanism (4) is started, the driving mechanism (4) drives the vertical pipe (3) to rotate, and the vertical pipe (3) drives all mixing mechanisms (5) to stir and mix the solvent and powder coating; when the driving mechanism (4) rotates in the forward direction, the mixing mechanism (5) can screen the coating particles in the solvent according to their volume; when the driving mechanism (4) rotates in the reverse direction, the external solvent can flush the screened coating particles in the mixing mechanism (5) into the vertical pipe (3); S2: The piston assembly (6) transports the paint in the vertical pipe (3) through the sleeve (2) to the crushing box (13) by means of reciprocating vertical motion; in the crushing box (13), the crushing mechanism (9) crushes and pulverizes the powder coating in the paint; S3: The paint passes through the drainage tube (14) from the crushing box (13), and the filtering mechanism (8) in the drainage tube (14) performs multiple screening on the paint particles in the paint. At the same time, the filtering mechanism (8) can send the screened paint particles back to the crushing box (13) for further crushing. After that, the paint is redispersed into the outer shell (1) through the discharge port (15) for mixing.

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