Electrostatic spraying equipment and method for machining friction plate

Abstract

The invention relates to the technical field of friction plate manufacturing, in particular to electrostatic spraying equipment and method for machining a friction plate. The equipment comprises a rack, an electric cabinet, a working bin, a belt type conveying device, a mesh belt conveying device and a spray gun arranged on a shell of the working bin, the electric cabinet is arranged on the lower portion of the rack, the working bin is installed on the rack, and an inlet and an outlet are formed in the front side and the rear side of the working bin. The belt type conveying device is arranged at the inlet and conveys friction plates to pass through a spraying area provided with a spraying gun, the mesh belt conveying device is arranged at the outlet, the feeding end of the mesh belt conveying device is located at the discharging end of the belt type conveying device, and the discharging end of the mesh belt conveying device is located outside the working bin. A plurality of magnetic tapes are arranged on a conveying belt of the belt type conveying device, the magnetic tapes are arranged in the extending direction of the conveying belt, and the multiple magnetic tapes are arranged in the transverse direction of the conveying belt at equal intervals. By means of the magnetic tape spraying device, the middle position of the magnetic tape in the width direction can be effectively sprayed, and the requirement for uniform spraying is met.

Description

Technical Field

[0001] The present invention belongs to the technical field of friction plate manufacturing, and particularly relates to an electrostatic spraying device and method for processing friction plates. Background Art

[0002] The friction plates used in braking systems are also known as brake pads and brake linings. Generally, they are divided into a friction layer, a heat insulation layer, and a steel plate layer. In the processing technology of friction plates, the surface of the friction plate needs to be electrostatically sprayed, so epoxy resin powder needs to be sprayed on the surface of the friction plate to improve the performance of the brake pads. In the traditional processing technology, the spraying process is manually controlled, and the spraying efficiency is low. Then, in the prior art, automatic spraying equipment appears, and automatic operation is realized by automatically controlling the spray gun and conveying the friction plates. At present, the application of automatic spraying equipment has been relatively extensive, but there are still some problems in the use process. First of all, in order to ensure stable spraying, the set brake pads are detachably attached to the surface of the conveyor belt or the conveying connecting plate, but this is not conducive to the subsequent recovery of the sprayed brake pads for continuous curing, cooling and other operation processes. On the other hand, in the commonly used existing process of processing brake pads by magnetic adsorption, magnetic adsorption surfaces are usually uniformly arranged on the conveyor belt or the chain plate, but the magnetic field formed by the magnetic force will interfere with the electric field distribution of the electrostatic spraying, making the sprayed particles unable to be evenly distributed. Summary of the Invention

[0003] The purpose of the present invention is to provide an electrostatic spraying device for processing friction plates, which is used to solve the technical problems that in the prior art, the setting method of the friction plates on the conveying device affects the spraying effect of the friction plates and the conveying process in the subsequent process during the electrostatic spraying process.

[0004] The described electrostatic spraying device for processing friction plates includes a frame, an electric control box, a working chamber, a belt conveying device, a mesh belt conveying device, and a spray gun arranged on the shell of the working chamber. The electric control box is arranged at the lower part of the frame, the working chamber is installed on the frame, an inlet and an outlet are arranged on the front and rear sides of the working chamber. The belt conveying device is arranged at the inlet and conveys the friction plates through the spraying area where the spray gun is arranged. The mesh belt conveying device is arranged at the outlet. The feeding end of the mesh belt conveying device is located at the discharging end of the belt conveying device, and the discharging end of the mesh belt conveying device is located outside the working chamber. A plurality of magnetic tapes are arranged on the conveyor belt of the belt conveying device. The magnetic tapes are arranged along the extending direction of the conveyor belt and are arranged in multiple rows at equal intervals along the transverse direction of the conveyor belt. When the electrostatic spraying device works, the friction plates in each row correspond to the magnetic tapes one by one.

[0005] Preferably, the spray gun is arranged in the spraying area in the working chamber through a bracket. The width of the magnetic tape is smaller than the width of the friction plate. The spray gun is arranged between two adjacent friction plates in the same row, and the spraying range of the spray gun covers the positions of the magnetic tapes on both sides of the spray gun.

[0006] Preferably, the support is an electrically controlled electric telescopic support, and a T-shaped support structure is provided at the extending end of the electric telescopic support. The spray guns are arranged in pairs and symmetrically installed at both ends of the T-shaped support structure.

[0007] Preferably, the conveyor belt includes a driving belt and a load belt. The belt conveyor device further includes a belt driving mechanism. The driving belts are located on the left and right sides of the conveyor belt. The driving wheels and driven wheels of the belt driving mechanism are respectively in frictional connection with the corresponding driving belts on the same side. The load belts are located between the magnetic tapes and the driving belts and between adjacent magnetic tapes.

[0008] Preferably, the load belt is non-magnetic and its top is higher than the top of the magnetic tape. After the friction plate is placed above the magnetic tape, the friction plate is supported by the surface of the load belt. There is a gap between the magnetic tape and the bottom of the friction plate, and the size of the gap is smaller than the adsorption distance of the magnetic tape.

[0009] Preferably, a heating and curing area and a cooling area are further provided in the working chamber, and the mesh belt conveyor device passes through the heating and curing area and the cooling area.

[0010] Preferably, a product collection box is provided at the outlet of the working chamber. The top of the product collection box is open. The discharging end of the mesh belt conveyor device is installed at the opening of the product collection box, and the discharging end of the mesh belt conveyor device corresponds to the receiving inclined surface on the product collection box.

[0011] The present invention also provides an electrostatic spraying method for processing friction plates, using the above-mentioned electrostatic spraying equipment for processing friction plates, and including the following steps:

[0012] 1. Start and debug the above-mentioned electrostatic spraying equipment;

[0013] 2. Place the friction plates to be sprayed on each magnetic tape of the belt conveyor device in a manner that the length direction is consistent with the extending direction of the magnetic tape, and convey them to the working chamber;

[0014] 3. The friction plates pass through the spraying area along with the conveyor belt. The spray guns descend and their spraying ranges cover the middle parts of the friction plates, and then spraying is carried out;

[0015] 4. Before entering the heating and curing area, the friction plates are conveyed onto the mesh belt conveyor device, and the mesh belt conveyor device conveys the friction plates through the heating and curing area to complete curing;

[0016] 5. The friction plates continue to pass through the cooling area and are cooled to room temperature;

[0017] 6. Output the friction plates for inspection and assembly.

[0018] Preferably, the friction plates are placed on the magnetic tapes to form a horizontal row of friction plates. The magnetic tapes are located in the middle of the friction plates, and the horizontal relative positions of the friction plates, the magnetic tapes, and the spray guns are controlled.

[0019] The present invention has the following advantages: After arranging the friction plates, the magnetic tape can effectively adsorb the friction plates, achieving the effect of preventing the friction plates from moving during transportation and spraying, and ensuring stable spraying effect. The position of the spray gun is far from the position of the magnetic tape, and the width of the magnetic tape is significantly reduced compared with the prior art. Therefore, the influence of its magnetic field on electrostatic spraying is reduced. During the spraying process, the area of the friction plates not adsorbed by the magnetic tape can be sprayed as evenly as possible by the spray gun. The position of the magnetic tape belongs to the edge of the spraying range of two adjacent spray guns. Although the spraying effect of the spray gun here is relatively poor, through the overlap of the spraying ranges, the middle position in the width direction of the magnetic tape can be effectively sprayed, ensuring the requirement of uniform spraying and overcoming the problems existing in the prior art.

[0020] The present invention transports the friction plates through the heating and curing area by a mesh belt conveying device, which can avoid the thermosetting of the plastic powder sprayed on the conveyor belt. Part of the excess plastic powder can be recycled when the conveyor belt rotates, reducing the waste of plastic powder. It is also beneficial to improve the efficiency of subsequent cooling. The height of the load belt is slightly higher than that of the magnetic tape, achieving the adsorption of the friction plates by the magnetic tape while facilitating the transfer of the friction plates to the mesh belt. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of an electrostatic spraying device for processing friction plates in the present invention.

[0022] Figure 2 is Figure 1 a schematic structural diagram of the shown structure from another perspective.

[0023] Figure 3 is Figure 1 a schematic structural diagram of the spray gun and the conveyor belt in the shown structure.

[0024] The reference numerals therein include: 1 frame, 2 working chamber, 3 electric control box, 4 operation panel, 5 conveyor belt, 51 driving belt, 52 load belt, 53 magnetic tape, 6 belt driving mechanism, 7 mesh belt, 8 product collection box, 9 warehouse door, 10 spray gun, 11 bracket, 12 friction plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The following further describes in detail the specific embodiments of the present invention with reference to the drawings through the description of the embodiments, so as to help those skilled in the art have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention.

[0026] As Figures 1 - 3As shown in the figure, the present invention provides an electrostatic spraying device for processing friction plates, which includes a frame 1, an electric control box 3, a working chamber 2, a belt conveying device, a mesh belt 7 conveying device, and a spray gun 10 arranged on the shell of the working chamber 2. The electric control box 3 is arranged at the lower part of the frame 1, the working chamber 2 is installed on the frame 1, an inlet and an outlet are arranged on the front and rear sides of the working chamber 2. The belt conveying device is arranged at the inlet and conveys the friction plate 12 through the spraying area where the spray gun 10 is arranged. The mesh belt 7 conveying device is arranged at the outlet. The feeding end of the mesh belt 7 conveying device is located at the discharging end of the belt conveying device, and the discharging end of the mesh belt 7 conveying device is located outside the working chamber 2. A plurality of magnetic tapes 53 are arranged on the conveyor belt 5 of the belt conveying device. The magnetic tapes 53 are arranged along the extending direction of the conveyor belt 5 and are arranged at equal intervals in the transverse direction of the conveyor belt 5. When the electrostatic spraying device works, the friction plates 12 in each row correspond to the magnetic tapes 53 one by one.

[0027] The spray gun 10 is arranged in the spraying area in the working chamber 2 through a bracket 11. The width of the magnetic tape 53 is smaller than the width of the friction plate 12. The spray gun 10 is arranged between two adjacent friction plates 12 in the same row, and the spraying range of the spray gun 10 covers the positions of the magnetic tapes 53 on both sides of the spray gun 10. By adopting this setting method of the spray gun 10, the position of the spray gun 10 is far from the position of the magnetic tape 53, and the width of the magnetic tape 53 is significantly reduced compared with the prior art. Therefore, the influence of its magnetic field on electrostatic spraying is reduced. During the spraying process, the area of the friction plate 12 not adsorbed by the magnetic tape 53 can be sprayed as evenly as possible by the spray gun 10. And the position of the magnetic tape 53 belongs to the edge of the spraying ranges of two adjacent spray guns 10 at the same time. Although the spraying effect of the spray gun 10 here is relatively poor, through the overlap of the spraying ranges, the middle position in the width direction of the magnetic tape 53 can be effectively sprayed. By adjusting the spraying range and the powder flow rate of the sprayed plastic powder, the uniform spraying effect on the surface of the friction plate 12 can be achieved.

[0028] The bracket 11 is an electrically controlled electric telescopic bracket 11, and a T-shaped bracket 11 structure is arranged at the extending end of the electric telescopic bracket 11. The spray guns 10 are arranged in pairs and symmetrically installed at both ends of the T-shaped bracket 11 structure. Installation chucks for clamping and fixing the spray guns 10 are installed at both ends of the T-shaped bracket 11 structure. After installation, the nozzles of the spray guns 10 are arranged vertically downward.

[0029] The conveyor belt 5 includes a driving belt 51 and a load belt 52. The belt conveyor device further includes a belt driving mechanism 6. The driving belts 51 are located on the left and right sides of the conveyor belt 5. The driving wheel and the driven wheel of the belt driving mechanism 6 are respectively in frictional connection with the corresponding side of the driving belt 51. The load belt 52 is between the magnetic tapes 53 and the driving belt 51 and between adjacent magnetic tapes 53. The load belt 52 is non-magnetic and its top is higher than the top of the magnetic tapes 53. After the friction plates 12 are placed above the magnetic tapes 53, the friction plates 12 are supported by the surface of the load belt 52. There is a gap between the bottom of the magnetic tapes 53 and the friction plates 12, and the size of the gap is smaller than the adsorption distance of the magnetic tapes 53. In this way, on the one hand, the magnetic tapes 53 can adsorb the friction plates 12 supported by the load belt 52 to ensure the stability of the friction plates 12 during the spraying process. On the other hand, this adsorption is relatively limited. When the friction plates 12 reach the discharge end of the belt conveyor device, once blocked by the mesh belt 7 of the mesh belt 7 conveyor device, the friction plates 12 can easily fall onto the mesh belt 7 to maintain the position and spacing of the friction plates 12 on the mesh belt 7.

[0030] A heating and curing area and a cooling area are also provided in the working chamber 2. The mesh belt 7 conveyor device passes through the heating and curing area and the cooling area. By conveying the friction plates 12 through the heating and curing area by the mesh belt 7 conveyor device, it is possible to prevent the plastic powder sprayed on the conveyor belt 5 from being heated and cured. Part of the excess plastic powder can be recovered when the conveyor belt 5 rotates, reducing the waste of plastic powder.

[0031] A product collection box 8 is provided at the outlet of the working chamber 2. The top of the product collection box 8 is open. The discharge end of the mesh belt 7 conveyor device is installed at the opening of the product collection box 8. The discharge end of the mesh belt 7 conveyor device corresponds to the receiving inclined plane on the product collection box 8. The receiving inclined plane reduces the damage and defects caused by the friction plates 12 directly falling and hitting other friction plates 12.

[0032] In addition, the operation panel 4 used for setting working parameters is arranged in front of the working chamber 2 for the convenience of the operator to set parameters and debug. Both the left and right sides of the working chamber 2 are provided with openable and closable chamber doors 9, which facilitate the operator to clean and maintain the internal working conditions of the working chamber 2 when necessary. Transparent windows are provided on the chamber doors 9 to facilitate the operator to observe the internal working conditions of the working chamber 2.

[0033] The present invention also provides an electrostatic spraying method for processing the friction plates 12, including the following steps.

[0034] 1. Start and debug the above-mentioned electrostatic spraying equipment for processing the friction plates 12.

[0035] In this step, during the debugging process, set the working parameters of the electrostatic spraying equipment, including the fluidization air pressure, powder extraction air pressure, and atomization air pressure for electrostatic spraying, as well as the variable frequency speed regulation of the motors of each conveying device, the temperature of the drying oven in the heating and curing area, the electrostatic current and electrostatic high voltage used in electrostatic spraying.

[0036] Second, place the friction plates 12 to be sprayed on each magnetic tape 53 of the belt conveying device in a manner that the length direction of the friction plates 12 is consistent with the extending direction of the magnetic tape 53, and convey them to the working chamber 2.

[0037] In this way, a horizontal row of friction plates 12 is formed on the conveyor belt 5, and the friction plates 12 in the same row correspond to the magnetic tapes 53 one by one. The magnetic tape 53 is located in the middle of the friction plate 12, which can control the lateral relative positions of the friction plate 12, the magnetic tape 53, and the spray gun 10, thus ensuring relatively uniform subsequent spraying.

[0038] Third, the friction plates 12 pass through the spraying area along with the conveyor belt 5, and after the spraying range of the spray gun 10 covers the middle of the friction plates 12, spraying is carried out.

[0039] During spraying, the position of the spray gun 10 is adjusted up and down so that the spraying range of the spray gun 10 covers the middle of the friction plates 12. At this time, the position of the spray gun 10 is far from the position of the magnetic tape 53, reducing the influence of the magnetic field generated by the magnetic tape 53 on electrostatic spraying. And the position of the magnetic tape 53 is at the edge of the spraying ranges of two adjacent spray guns 10 at the same time. By overlapping the spraying ranges, it is ensured that the middle parts of the friction plates 12 located at the edges of the spraying ranges can also be effectively sprayed.

[0040] Fourth, before the friction plates 12 enter the heating and curing area, they are conveyed onto the mesh belt 7 conveying device, and the mesh belt 7 conveying device conveys the friction plates 12 through the heating and curing area to complete curing.

[0041] Since the temperature of the heating and curing area has been set previously, the heating and curing area is partially separated from the spraying area and the cooling area by a heat insulation partition to reduce heat transfer. After being conveyed through the heating and curing area by the mesh belt 7, the plastic powder on the friction plates 12 can be cured on the surface of the friction plates 12. At the same time, the excess plastic powder on the conveyor belt 5 falls downward and is recycled after the conveyor belt 5 is turned over.

[0042] Fifth, the friction plates 12 continue to pass through the cooling area and are cooled to room temperature.

[0043] The friction plates 12 pass through the cooling area along with the mesh belt 7, and this area is cooled by air cooling. Since the mesh belt 7 is used for conveying, the cold air can flow smoothly through the friction plates 12 during the cooling process, improving the cooling efficiency.

[0044] Sixth, output the friction plates 12 for inspection and assembly.

[0045] The friction plate 12 is conveyed by the mesh belt 7 conveyor to the discharge end and collected by the product collection box 8. The inspection and packing include detection and packing. The operator takes out the collected friction plates 12 for spot checks. When detecting, the five-point detection method is used to detect the thickness of the surface of the friction plate 12, and based on the detection results, it is judged whether the previous electrostatic spraying is uniform. After detection, if it meets the requirements, the friction plates 12 are packed into boxes. If it does not meet the requirements, the corresponding friction plates 12 are separated from the qualified products, and the electrostatic spraying equipment is inspected and debugged.

[0046] The present invention has been described exemplarily above in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above-mentioned manner. As long as various non-substantive improvements are made by adopting the inventive concept and technical solution of the present invention, or the inventive concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. An electrostatic spraying device for processing friction plates, characterized in that: It includes a frame, an electric control box, a working chamber, a belt conveyor, a mesh belt conveyor and a spray gun arranged on the working chamber shell, the electric control box is arranged at the lower part of the frame, the working chamber is installed on the frame, the front and rear sides of the working chamber are provided with an inlet and an outlet, the belt conveyor is arranged at the inlet and conveys the friction plate through the spraying area where the spray gun is arranged, the mesh belt conveyor is arranged at the outlet, the feeding end of the mesh belt conveyor is located at the discharging end of the belt conveyor, and the discharging end of the mesh belt conveyor is located outside the working chamber, a plurality of magnetic tapes are arranged on the conveyor belt of the belt conveyor, the magnetic tapes are arranged along the extension direction of the conveyor belt, and a plurality of magnetic tapes are arranged at equal intervals along the transverse direction of the conveyor belt, when the electrostatic spraying equipment is working, the friction plates in each row of friction plates correspond to the magnetic tapes one by one.

2. The electrostatic spraying equipment for processing friction plates according to claim 1, characterized in that: The spray gun is arranged in the spraying area in the working chamber through a bracket, the width of the magnetic tape is smaller than the width of the friction plate, the spray gun is arranged between two adjacent friction plates in the same row and the spraying range of the spray gun covers the magnetic tape positions on both sides of the spray gun.

3. The electrostatic spraying equipment for processing friction plates according to claim 2, characterized in that: The bracket is an electrically controlled electric telescopic bracket, and a T-shaped bracket structure is arranged at the extended end of the electric telescopic bracket. The spray guns are arranged in pairs and symmetrically installed at both ends of the T-shaped bracket structure.

4. The electrostatic spraying equipment for processing friction plates according to claim 1 or 2, characterized in that: The conveyor belt includes a driving belt and a load belt. The belt conveyor device also includes a belt driving mechanism. The driving belt is located on the left and right sides of the conveyor belt. The driving wheel and the driven wheel of the belt driving mechanism are respectively frictionally connected with the driving belt on the corresponding side. The load belt is between the magnetic tape and the driving belt and between adjacent magnetic tapes.

5. The electrostatic spraying equipment for processing friction plates according to claim 4, characterized in that: The load belt is non-magnetic and its top is higher than the top of the magnetic tape. After the friction plate is above the magnetic tape, the friction plate is supported by the surface of the load belt. There is a gap between the magnetic tape and the bottom of the friction plate, and the gap size is smaller than the adsorption distance of the magnetic tape.

6. The electrostatic spraying equipment for processing friction plates according to claim 1, characterized in that: The working chamber is also provided with a heating and curing zone and a cooling zone, and the mesh belt conveying device passes through the heating and curing zone and the cooling zone.

7. The electrostatic spraying equipment for processing friction plates according to claim 1, characterized in that: A product collection box is provided at the outlet of the working bin, the top of the product collection box is open, the discharge end of the mesh belt conveyor is installed at the opening of the product collection box, and the discharge end of the mesh belt conveyor corresponds to the receiving slope on the product collection box.

8. An electrostatic spraying method for processing a friction plate, characterized in that: Using an electrostatic spraying device for processing a friction plate according to any one of claims 1 to 7, and comprising the following steps:

1. Start and debug the electrostatic spraying equipment; 2. Place the friction plates to be sprayed on the respective magnetic tapes of the belt conveyor device in a manner that the length direction thereof is consistent with the extension direction of the magnetic tape, and convey the friction plates to the working chamber; 3. The friction plate passes through the spraying area along with the conveyor belt, and the spray gun descends and allows its spraying range to cover the middle part of the friction plate before spraying; 4. The friction plate is transported to the mesh belt conveyor before entering the heating and curing zone, and the mesh belt conveyor transports the friction plate through the heating and curing zone to complete the curing; 5. The friction plate continues to pass through the cooling zone and is cooled to room temperature; 6. Inspect and install the output friction plate.

9. The electrostatic spraying method for machining a friction plate according to claim 1, characterized in that: The friction plates are placed on the magnetic tape to form a horizontal row of friction plates, and the magnetic tape is located in the middle of the friction plates to control the horizontal relative positions of the friction plates, the magnetic tape and the spray gun.

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