A coating process

Abstract

The application discloses a coating process, comprising the following steps: step one: continuously feeding the heated and melted epoxy resin powder into the powder box, so that the epoxy resin powder flows flat and is kept at the height of the overflow port, and the first rotating plate rotates to maintain the stability of the epoxy resin powder; step two: mounting the workpiece on the tooling plate; step three: immersing the tooling plate in the epoxy resin powder to coat the epoxy resin powder on the profiled wire surface; step four: moving the coated profiled wire into the fixed tunnel furnace for curing treatment; step five: moving the cured profiled wire to the cooling treatment area through the conveying chain; and step six: unloading the profiled wire on the tooling plate for arrangement and packaging. The coating process provided by the application can eliminate the bubbles generated by the feeding of the epoxy resin powder by driving the rotation of the driving rod through the driving motor, so as to drive the first rotating plate to stir the epoxy resin powder, and the uniformity of coating is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of profiled wire coating, and particularly relates to a coating process. BACKGROUND

[0002] The profiled wire is applied to a motor, and is made of copper and formed by a forming machine. The profiled wire includes a terminal wire, a bridge wire and a star point wire. The profiled wire needs to be coated with epoxy resin powder for insulation treatment in the manufacturing process. The original coating technology is manual coating by workers, which has low work efficiency, cannot guarantee the quality of workpieces and has high production cost.

[0003] In the patent application with the publication number CN1214278A, a method for coating a fan blade with a corrosion-resistant plastic coating is disclosed. The fan blade is uniformly heated to 200-400 DEG C, and then is sleeved on a rolling shaft and fixedly connected with the rolling shaft. The fan blade is placed in a vulcanization bed box filled with plastic powder. The vulcanization bed box blower is started, and the rolling shaft is rotated at a constant speed to drive the fan blade to roll in the vulcanization bed box. The rolling mode is alternately clockwise and counterclockwise. The plastic powder is melted and adhered to the fan blade to reach a required thickness. The method has the advantages of simple production process, low processing cost and obvious corrosion-resistant effect. The application can replace manual coating, but cannot realize coating of products in batches and in order, and is inconvenient to control the coating area. The coating efficiency and effect cannot meet the requirements.

[0004] In the patent application with the publication number CN109637747A, a profiled wire coating machine is disclosed. The profiled wire coating machine comprises a fixing frame, a panel with an opening in the middle horizontally arranged on the fixing frame, an installation platform and a wire insertion tool bracket arranged above the panel, a lifting cylinder and a translation cylinder respectively arranged on the installation platform, and an installation plate connected with the lifting cylinder and the translation cylinder. The wire insertion tool bracket is connected with the installation plate, and the lifting cylinder and the translation cylinder are connected with the installation plate and can drive the wire insertion tool bracket to move up and down or forward and backward through the installation plate. A powder box, a forward and backward displacement mechanism, a left and right displacement mechanism and an up and down lifting mechanism are arranged below the panel. The powder box is arranged below the panel and fixed at the bottom of the connection plate which is slidably connected with the forward and backward displacement mechanism. The forward and backward displacement mechanism is connected with the left and right displacement mechanism and drives the powder box to move left and right through the left and right displacement mechanism. The up and down lifting mechanism is arranged below the forward and backward displacement mechanism and can drive the powder box to move up and down. The profiled wire can enter the coating production line in batches and in order, and the production efficiency is improved. The application can improve the production efficiency, but in the powder supply process of actual coating operation, the epoxy resin powder may occasionally boil up from the bottom of the powder box, and the surface of the epoxy resin powder may be blown off and burst, which may cause uneven coating of the surface of the profiled wire, and thus may cause poor insulation treatment effect, and may easily cause motor failure and short service life. SUMMARY

[0005] In order to solve the problems of the prior art, the present application provides a sulfurization bed mechanism for coating and a coating process.

[0006] In order to achieve the above-mentioned purpose, the present application provides the following technical solutions.

[0007] A coating process comprises a sulfurization bed mechanism, the sulfurization bed mechanism comprises a powder box and a stirring mechanism, the upper end of the powder box is provided with an overflow port, the outer end of the powder box is provided with an overflow pipe, the overflow pipe corresponds to the overflow port, the stirring mechanism comprises a driving motor, a driving rod, a mounting sleeve rod and a mounting frame, the mounting frame is mounted at the lower end of the powder box, the driving motor is mounted at the lower end of the mounting frame, the upper end of the driving motor is provided with a rotating shaft, the mounting sleeve rod is mounted at the upper end of the mounting frame, the upper end of the driving rod is connected with the upper end of the mounting sleeve rod through a first sealing bearing, the lower end of the driving rod is connected with the lower end of the mounting sleeve rod through a second sealing bearing, the bottom of the driving rod is connected with the rotating shaft through a shaft coupling, the top of the driving rod is provided with a buckle cap, the buckle cap is buckled on the upper end of the mounting sleeve rod, and the upper end of the buckle cap is provided with a plurality of first rotating plates.

[0008] The coating process comprises the following steps: step one: continuously input the heated and melted epoxy resin powder into the powder box through the feeding pipe inserted into the lower end of the powder box, so that the epoxy resin powder flows flat and is kept at the height of the overflow port, and the first rotating plate is driven to rotate by the driving motor to maintain the stability of the epoxy resin powder; step two: mounting the workpiece on the tooling plate; step three: moving the tooling plate to the powder box by the manipulator, immersing the tooling plate in the epoxy resin powder, and coating the epoxy resin powder on the profiled wire surface by repeated movement; step four: moving the coated profiled wire to the conveying chain by the manipulator, and then moving the tooling plate into the fixed tunnel furnace through the conveying chain for curing treatment, the curing temperature is 150-200 DEG C, and the curing time is 40 minutes; step five: moving the cured profiled wire to the cooling treatment area through the conveying chain, and performing air cooling treatment for 20 minutes; step six: unloading the profiled wire on the tooling plate, and arranging and packaging.

[0009] Further, the powder box comprises a lower shell, a middle shell and an upper shell, a first sealing gasket ring is arranged between the middle shell and the lower shell, the middle shell, the lower shell and the first sealing gasket ring are fixedly connected, a first supporting ring is arranged on the inner wall of the middle shell, a first supporting plate is arranged between the first supporting ring and the first sealing gasket ring, a second sealing gasket ring is arranged between the middle shell and the upper shell, the middle shell, the lower shell and the second sealing gasket ring are fixedly connected, a second supporting plate is arranged between the first supporting ring and the second sealing gasket ring, and the overflow port corresponds to the upper end of the upper shell.

[0010] Furthermore, a powder-absorbing shell is provided on the outer side of the upper shell, the lower end of the powder-absorbing shell is fixedly connected to the upper shell, a powder-absorbing port is provided between the powder-absorbing shell and the upper shell, and negative pressure ports are provided at both ends of the powder-absorbing shell.

[0011] Furthermore, a second support ring is provided on the inner wall of the lower shell, a canvas is provided at the upper end of the second support ring, and air inlets are provided at both ends of the lower shell.

[0012] Furthermore, the powder box is provided with a baffle plate, which corresponds to the overflow port. The baffle plate is provided with a plurality of first slots. The upper end of the upper shell is provided with a first mounting hole. The first slots correspond one-to-one with the first mounting holes. The first mounting holes are located at the upper end of the overflow port.

[0013] Furthermore, the upper end of the mounting sleeve is provided with several second rotating plates, the lower end of the upper shell is provided with several first fixing blocks, the first fixing blocks are provided with second slots, and the ends of the second rotating plates are provided with second mounting holes, with the second slots corresponding one-to-one with the second mounting holes.

[0014] Furthermore, a groove is formed between the lower end of the buckle and the upper end of the mounting sleeve rod. A first sealing ring is provided in the groove. The cross-section of the first sealing ring is inverted U-shaped. A conical burr is provided at the lower end of the first sealing ring near the mounting sleeve rod, and a reinforcing part is provided at the upper end of the first sealing ring near the mounting sleeve rod.

[0015] Preferably, the lower end of the mounting sleeve is provided with a groove, and a second sealing ring is provided in the groove.

[0016] The coating process disclosed in this invention has the following advantages compared with the prior art: the present application includes a stirring mechanism, which drives the rotation of the drive rod by a drive motor, thereby driving the first rotating plate to stir the epoxy resin powder. This can eliminate the bubbles generated when the epoxy resin powder is introduced, thereby ensuring that the epoxy resin powder remains uniform, thus ensuring the uniformity of the coating and the insulation of the irregular wire. The mounting sleeve rod serves to support the drive rod and also prevents the epoxy resin powder from affecting the rotation of the drive rod. Attached Figure Description

[0017] Figure 1 is a schematic diagram of the structure from the main perspective provided by the present invention.

[0018] Figure 2 is a schematic diagram of the structure from a side view provided by the present invention.

[0019] Figure 3 is a top-down structural diagram of the invention.

[0020] Figure 4 is a structural schematic diagram from a cross-sectional perspective provided by the present invention.

[0021] Figure 5 is a schematic diagram of the structure of part A provided by the present invention.

[0022] Figure 6 is a schematic diagram of the structure of part B provided by the present invention.

[0023] Figure 7 is a schematic diagram of the structure of part C provided by the present invention.

[0024] The reference numerals in the attached drawings include: 110, lower shell; 111, air inlet; 120, middle shell; 121, first sealing gasket ring; 122, second sealing gasket ring; 123, first support ring; 130, upper shell; 131, overflow pipe; 132, overflow port; 133, first mounting hole; 140, powder suction shell; 141, negative pressure port; 150, baffle; 151, first slot; 161, first support plate; 162, second support plate; 170, second rotation. Plate; 171, Second mounting hole; 180, First fixing block; 181, Second slot; 190, Powder suction port; 200, Drive motor; 210, Rotating shaft; 220, Coupling; 230, Mounting bracket; 240, Mounting sleeve rod; 241, Second sealing ring; 250, Drive rod; 251, Buckle; 261, First sealing bearing; 262, Second sealing bearing; 270, Slot; 271, First sealing ring; 280, First rotating plate. Implementation

[0025] This invention discloses a coating process. The specific implementation of this invention will be further described below with reference to preferred embodiments.

[0026] Referring to Figures 1-7 in the accompanying drawings, Figure 1 is a structural schematic diagram from the main view provided by the present invention, Figure 2 is a structural schematic diagram from the side view provided by the present invention, Figure 3 is a structural schematic diagram from the top view provided by the present invention, Figure 4 is a structural schematic diagram from the cross-sectional view provided by the present invention, Figure 5 is a structural schematic diagram of part A provided by the present invention, Figure 6 is a structural schematic diagram of part B provided by the present invention, and Figure 7 is a structural schematic diagram of part C provided by the present invention.

[0027] Preferred embodiment.

[0028] This application provides a coating process including a vulcanizing bed mechanism. The vulcanizing bed mechanism includes a powder box and a stirring mechanism. The powder box has an overflow port 132 at its upper end and an overflow pipe 131 at its outer end, with the overflow pipe 131 corresponding to the overflow port 132. The stirring mechanism includes a drive motor 200, a drive rod 250, a mounting sleeve rod 240, and a mounting frame 230. The mounting frame 230 is mounted at the lower end of the powder box, and the drive motor 200 is mounted at the lower end of the mounting frame 230. The drive motor 200 has a rotating shaft 210 at its upper end. Mounting sleeve 240 is mounted on the upper end of mounting bracket 230. The upper end of driving rod 250 is connected to the upper end of mounting sleeve 240 via a first sealed bearing 261. The lower end of driving rod 250 is connected to the lower end of mounting sleeve 240 via a second sealed bearing 262. The bottom of driving rod 250 is connected to rotating shaft 210 via coupling 220. The top of driving rod 250 is provided with cap 251, which is fastened to the upper end of mounting sleeve 240. The upper end of cap 251 has several first rotating plates 280.

[0029] The coating process includes the following steps: Step 1: Continuously feed heated and melted epoxy resin powder into the powder box through the feeding pipe inserted at the bottom of the powder box, ensuring the epoxy resin powder flows smoothly and is maintained at the overflow height. A drive motor rotates the first rotating plate to maintain the stability of the epoxy resin powder. Step 2: Mount the workpiece on a tooling plate. Step 3: Use a robotic arm to move the tooling plate onto the powder box, immersing the tooling plate in the epoxy resin powder. Repeated motion coats the surface of the shaped wire with epoxy resin powder. Step 4: Use a robotic arm to move the coated shaped wire to a conveyor chain. The tooling plate then enters a fixed tunnel oven via the conveyor chain for curing treatment. The curing temperature is 150-200 degrees Celsius, and the curing time is 40 minutes. Step 5: Move the cured shaped wire to a cooling treatment area via the conveyor chain for air cooling treatment for 20 minutes. Step 6: Remove the shaped wire from the tooling plate for sorting and packaging. Molten epoxy resin powder is continuously fed into the powder hopper through a feed pipe inserted into the lower end of the hopper. When the epoxy resin powder depth exceeds the overflow port 132, it is discharged through the overflow port 132 and the overflow pipe 131, ensuring that the depth of epoxy resin powder in the powder hopper remains stable. A fixture automatically extends a shaped wire into the powder hopper. After the epoxy resin powder contacts the surface of the shaped wire, it adheres to the surface and gradually accumulates to form an insulating layer. The overflow port 132 ensures the depth of the epoxy resin powder, and the insertion of the fixture ensures that the shaped wire is always coated in the required area, guaranteeing coating accuracy and improving coating quality. The drive motor 200 starts and drives the rotating shaft 210 to rotate, which in turn drives the drive rod 250 to rotate through the coupling 220. The drive rod 250 then drives the first rotating plate 280 to stir, which can eliminate the bubbles generated when the epoxy resin powder is introduced, thereby ensuring the stability of the epoxy resin powder in the powder box, and thus ensuring the coating effect and quality.

[0030] Further, the powder box includes a lower shell 110, a middle shell 120, and an upper shell 130. A first sealing gasket 121 is provided between the middle shell 120 and the lower shell 110. The middle shell 120, the lower shell 110, and the first sealing gasket 121 are fixedly connected. A first support ring 123 is provided on the inner wall of the middle shell 120. A first support plate 161 is provided between the first support ring 123 and the first sealing gasket 121. A second sealing gasket 122 is provided between the middle shell 120 and the upper shell 130. The middle shell 120, the lower shell 110, and the second sealing gasket 122 are fixedly connected. A second support plate 162 is provided between the first support ring 123 and the second sealing gasket 122. The overflow port 132 corresponds to the upper end of the upper shell 130.

[0031] Furthermore, a powder-absorbing shell 140 is provided on the outer side of the upper shell 130. The lower end of the powder-absorbing shell 140 is fixedly connected to the upper shell 130. A powder-absorbing port 190 is provided between the powder-absorbing shell 140 and the upper shell 130. Negative pressure ports 141 are provided at both ends of the powder-absorbing shell 140. The negative pressure ports 141 are connected to a negative pressure device to provide a negative pressure environment, so that the epoxy resin powder floating on the surface of the upper shell 130 will be sucked into the powder-absorbing shell 140 through the powder-absorbing port 190, preventing the epoxy resin powder from floating out, interfering with the coating operation of the irregular line, and causing environmental pollution.

[0032] Furthermore, a second support ring is provided on the inner wall of the lower shell 110, and a canvas is provided at the upper end of the second support ring. Air inlets 111 are provided at both ends of the lower shell 110. The air inlets 111 are connected to a blower, which can blow air into the lower shell 110. The canvas can divide the lower shell 110 into upper and lower layers. When epoxy resin powder leaks down through the first support plate 161 and the second support plate 162, the canvas can be used to contain the epoxy resin powder leaking down to the lower layer. However, the airflow in the lower layer can blow the epoxy resin powder through the canvas into the upper layer, which can ensure that the epoxy resin powder will not leak further down.

[0033] Furthermore, the powder box is equipped with a baffle 150, which corresponds to the overflow port 132. The baffle 150 has a plurality of first slots 151, and the upper end of the upper shell 130 has a first mounting hole 133. The first slots 151 and the first mounting holes 133 correspond one-to-one, and the first mounting holes 133 are located at the upper end of the overflow port 132. The baffle 150 is fixed to the upper end of the overflow port 132 by using the first mounting holes 133 and the first slots 151. By adjusting the gap between the baffle 150 and the overflow port 132, the overflow rate of epoxy resin powder can be adjusted to ensure the depth and surface flatness of the epoxy resin powder, thereby ensuring the coating position area and coating effect of the irregular lines.

[0034] Furthermore, the upper end of the mounting sleeve 240 is provided with a plurality of second rotating plates 170, and the lower end of the upper shell 130 is provided with a plurality of first fixing blocks 180. Each first fixing block 180 has a second slot 181, and the end of each second rotating plate 170 has a second mounting hole 171. The second slot 181 corresponds one-to-one with the second mounting hole 171. One end of the second rotating plate 170 is fixedly connected to the mounting sleeve 240, and the other end is fixedly connected to the first fixing block 180. The second slot 181 facilitates connection with the second mounting hole 171 using a bolt structure, thus fixing the mounting sleeve 240 and preventing it from shaking when the first rotating plate 280 rotates. This ensures the defoaming ability of the first rotating plate 280, guarantees the uniformity of the epoxy resin powder, and ultimately ensures the coating quality.

[0035] Furthermore, a groove 270 is formed between the lower end of the cap 251 and the upper end of the mounting sleeve 240. A first sealing ring 271 is provided in the groove 270. The cross-section of the first sealing ring 271 is inverted U-shaped. The lower end of the first sealing ring 271 near the mounting sleeve 240 has a conical spike, and the upper end of the first sealing ring 271 near the mounting sleeve 240 has a reinforcing part. The first sealing ring 271 is engaged between the cap 251 and the mounting sleeve 240, preventing epoxy resin powder from entering the first sealing bearing 261 and the second sealing bearing 262, and preventing the rotation of the first sealing bearing 261 and the second sealing bearing 262 from jamming, thereby ensuring the stirring effect of the first rotating plate 280.

[0036] Preferably, the lower end of the mounting sleeve 240 is provided with a groove, and a second sealing ring 241 is provided in the groove. The second sealing ring 241 is disposed between the mounting sleeve 240 and the lower shell 110, which can prevent the epoxy resin powder from flowing into the mounting bracket 230 through the mounting sleeve 240 and prevent the drive motor 200 from being affected by the epoxy resin powder, resulting in abnormal rotation.

[0037] It is worth mentioning that the technical features such as the feed pipe, blower, and negative pressure device involved in this patent application should be regarded as prior art. The specific structure, working principle, and possible control methods and spatial arrangement of these technical features can be adopted using conventional choices in the field, and should not be regarded as the inventive point of this patent. This patent will not be further elaborated in detail.

[0038] For those skilled in the art, modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the protection scope of this invention.

Claims

1. A coating process, characterized in that, The device includes a vulcanizing bed mechanism, which comprises a powder box and a stirring mechanism. The powder box has an overflow port at its upper end and an overflow pipe at its outer end, with the overflow pipe corresponding to the overflow port. The stirring mechanism includes a drive motor, a drive rod, a mounting sleeve, and a mounting frame. The mounting frame is installed at the lower end of the powder box, and the drive motor is installed at the lower end of the mounting frame. The drive motor has a rotating shaft at its upper end, and the mounting sleeve is installed at the upper end of the mounting frame. The upper end of the drive rod is connected to the upper end of the mounting sleeve via a first sealed bearing, and the lower end of the drive rod is connected to the lower end of the mounting sleeve via a second sealed bearing. The bottom of the drive rod is connected to the rotating shaft via a coupling. The top of the drive rod has a cap that fastens to the upper end of the mounting sleeve, and the upper end of the cap has several first rotating plates. The powder box includes a lower shell, a middle shell and an upper shell. The upper end of the mounting sleeve is provided with a plurality of second rotating plates. The lower end of the upper shell is provided with a plurality of first fixing blocks. The first fixing blocks are provided with second slots. The ends of the second rotating plates are provided with second mounting holes. The second slots correspond one-to-one with the second mounting holes. The coating process The process includes the following steps: Step 1: Continuously feed heated and melted epoxy resin powder into the powder box through the feeding pipe inserted at the bottom of the powder box, ensuring the epoxy resin powder flows smoothly and remains at the overflow height. A drive motor rotates the first rotating plate to maintain the stability of the epoxy resin powder. Step 2: Mount the workpiece onto the tooling plate. Step 3: Use a robotic arm to move the tooling plate onto the powder box, immersing it in the epoxy resin powder. Repeated motion coats the irregularly shaped wire with the epoxy resin powder. Step 4: Use a robotic arm to move the coated irregularly shaped wire to a conveyor chain. The tooling plate then enters a fixed tunnel oven via the conveyor chain for curing at a temperature of 150-200 degrees Celsius for 40 minutes. Step 5: Move the cured irregularly shaped wire to a cooling zone via the conveyor chain for 20 minutes of air cooling. Step 6: Remove the irregularly shaped wire from the tooling plate for sorting and packaging.

2. The coating process according to claim 1, characterized in that, A first sealing gasket ring is provided between the middle shell and the lower shell. The middle shell, the lower shell, and the first sealing gasket ring are fixedly connected. A first support ring is provided on the inner wall of the middle shell. A first support plate is provided between the first support ring and the first sealing gasket ring. A second sealing gasket ring is provided between the middle shell and the upper shell. The middle shell, the lower shell, and the second sealing gasket ring are fixedly connected. A second support plate is provided between the first support ring and the second sealing gasket ring. The overflow port corresponds to the upper end of the upper shell.

3. The coating process according to claim 2, characterized in that, The outer side of the upper shell is provided with a powder-absorbing shell, the lower end of which is fixedly connected to the upper shell. A powder-absorbing port is provided between the powder-absorbing shell and the upper shell, and negative pressure ports are provided at both ends of the powder-absorbing shell.

4. The coating process according to claim 2, characterized in that, The inner wall of the lower shell is provided with a second support ring, the upper end of the second support ring is provided with canvas, and the two ends of the lower shell are provided with air inlets.

5. The coating process according to claim 2, characterized in that, The powder box is equipped with a baffle plate, which corresponds to the overflow port. The baffle plate is provided with a plurality of first slots. The upper end of the upper shell is provided with a first mounting hole. The first slots correspond one-to-one with the first mounting holes. The first mounting holes are located at the upper end of the overflow port.

6. The coating process according to claim 1, characterized in that, A groove is formed between the lower end of the buckle and the upper end of the mounting sleeve. A first sealing ring is provided in the groove. The cross-section of the first sealing ring is inverted U-shaped. A conical burr is provided at the lower end of the first sealing ring near the mounting sleeve, and a reinforcing part is provided at the upper end of the first sealing ring near the mounting sleeve.

7. The coating process according to claim 1, characterized in that, The lower end of the mounting sleeve is provided with a groove, and a second sealing ring is provided in the groove.

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