Glue powder coating device and glue powder coating method for water drill grinding and polishing

Abstract

The present invention discloses a glue powder coating device and glue powder coating method for water drill grinding and polishing, and belongs to the technical field of water drill processing. The device includes a frame, a support on the frame that can move up and down, a lifting structure between the support and the frame, a powder tray on the support, a powder scraping structure on the support, and a servo advance and retreat structure between the support and the powder tray; the powder scraping structure is fixed on the support, and the powder tray can reciprocate back and forth on the support; when applying powder, the servo advance and retreat structure drives the powder tray to step backward from the starting position, and after each stepping movement, the lifting structure drives the powder tray to reciprocate up and down once to apply powder, and at this time the powder scraping structure is in a scraping state; after a predetermined number of powder applications, the servo advance and retreat structure drives the powder tray to move forward to the starting position, and the powder scraping structure moves from the front of the powder tray to the back of the powder tray, and at this time the powder scraping structure is in a powder pushing state. This patent adopts a method in which the powder scraping structure does not move and the powder tray moves, which can reduce dust in the powder application process and reduce the amount of glue powder used.

Description

Technical Field

[0001] The invention belongs to the technical field of water drill processing, and particularly relates to a glue powder applying device and a glue powder applying method for water drill grinding and polishing. Background Art

[0002] Rhinestones are a very important accessory for jewelry and clothing, and are usually processed by grinding and polishing machines. The grinding and polishing process of rhinestones usually includes powdering, loading, grinding and polishing, heating and unloading.

[0003] A glue powder applying device is used during powder application. The existing glue powder applying device includes a frame, a support on the frame that can move up and down, a lifting structure between the support and the frame, a powder tray on the support, a powder scraping structure on the support and arranged along the left and right directions, and a cylinder that drives the powder scraping structure to move forward and backward. The powder tray is usually a rectangular tray, which is fixed on the support; the powder scraping structure can slide forward and backward on the support. The powder scraping structure includes a powder carrying rod and a powder scraping rod arranged side by side in front and back. The two ends of the powder carrying rod and the powder scraping rod are respectively arranged on two slides. The two slides are respectively located on the left and right sides of the powder tray and can be driven by the cylinder to move forward and backward. The powder scraping structure usually has two states: a scraping state and a powder pushing state. When the powder scraping structure is in the scraping state, the powder carrying rod rises and the powder scraping rod falls; when the powder scraping structure is in the powder pushing state, the powder carrying rod falls and the powder scraping rod rises.

[0004] The working process of the existing glue powder applying device is as follows: before applying powder, the cylinder pushes the powder scraping structure to move back and forth once to push and scrape the glue powder on the powder pan; when applying powder, the lifting structure allows the powder pan to rise so that the bottom of the clamp contacts the glue powder; after the powder applying is completed, the lifting structure allows the powder pan to descend.

[0005] For example, the patent with application number CN201820202075.1 discloses a powder scraping mechanism for a water drill grinding and polishing machine, including a powder scraping rod and a powder carrying rod located above the powder tray and swing arms located on both sides of the powder tray, the swing arms are connected to a linkage rod, the linkage rod is rotatably arranged on a mobile frame, the mobile frame is horizontally movably arranged on a support, one end of the swing arm on one side is connected to a cylinder transmission, the two ends of the powder scraping rod are connected to a first push rod, the two ends of the powder carrying rod are connected to a second push rod, the first push rod and the second push rod respectively pass through the mobile frame and are connected to a spring, and the first push rod and the second push rod are respectively in contact with the two ends of the swing arm. The support is movably arranged on the frame up and down, and the support is connected to a screw drive mechanism. The working process of this patent is as follows: the piston rod of the cylinder moves downward, driving the swing arm to swing counterclockwise with the linkage rod as the center, the right side of the swing arm swings upward, driving the first push rod to move upward, and then lifting the powder scraping rod, the left side of the swing arm swings downward, and the second push rod is pulled by the second spring and moves downward with the left side of the swing arm, thereby causing the powder carrying rod to drop and contact the glue powder in the powder pan, and then the driving rod pushes the movable frame to move horizontally, so that the powder carrying rod pushes the glue powder horizontally in the powder pan to cover the entire powder pan with the glue powder, and then the piston rod of the cylinder moves upward, driving the swing arm to swing clockwise with the linkage rod as the center, the left side of the swing arm swings upward, driving the second push rod to move upward, and then lifting the powder carrying rod, the right side of the swing arm swings downward, and the first push rod is pulled by the first spring and moves downward with the right side of the swing arm, thereby causing the powder scraping rod to drop and contact the glue powder in the powder pan, and the driving rod pushes the movable frame to move horizontally in the opposite direction, so that the powder scraping rod moves horizontally in the powder pan to scrape the glue powder flat.

[0006] The applicant discovered the following problems when using the aforementioned water drill grinding and polishing machine scraping mechanism:

[0007] (1) The interval between two powderings is very short, which may be less than 0.1s. Therefore, the powder scraping structure needs to move back and forth quickly. The fast movement speed and long moving distance are easy to cause dust, resulting in a bad production environment, which not only affects the physical and mental health of the operator, but also may shorten the service life of the equipment.

[0008] (2) Due to the dust generated by the rubber powder, the amount of rubber powder used will increase;

[0009] (3) The powder scraping structure is driven by a cylinder and is greatly affected by the air supply. Summary of the invention

[0010] In order to solve the above problems, the embodiment of the present invention provides a glue powder coating device and glue powder coating method for water drill grinding and polishing, which adopts a method in which the powder scraping structure is stationary and the powder plate moves; the stepping motion can run at a constant speed at a relatively low speed, and the movement distance is very short (3-8mm), so that the dust of the powder plate is very small, the production environment is good, and the amount of glue powder used is reduced. The technical solution is as follows:

[0011] On the one hand, an embodiment of the present invention provides a glue powder application device for water drill grinding and polishing, comprising a frame, a support 1 on the frame that can move up and down, a lifting structure between the support 1 and the frame, a powder tray 2 on the support 1, a powder scraping structure 3 on the support 1 and arranged in the left and right direction, and a servo advance and retreat structure between the support 1 and the powder tray 2; the powder scraping structure 3 is fixed on the support 1, and the powder tray 2 can reciprocate back and forth on the support 1; when applying powder, the servo advance and retreat structure drives the powder tray 2 to step backward from a starting position, and after each stepping movement, the lifting structure drives the powder tray 2 to reciprocate up and down once to apply powder, and at this time the powder scraping structure 3 is in a scraping state; after a predetermined number of powder applications, the servo advance and retreat structure drives the powder tray 2 to move forward to the starting position, and the powder scraping structure 3 moves from the front of the powder tray 2 to the rear of the powder tray 2, and at this time the powder scraping structure 3 is in a powder pushing state.

[0012] Among them, the servo advance and retreat structure in the embodiment of the present invention includes two horizontal linear rails 4 arranged side by side on the left and right, a first screw rod 5 between the two horizontal linear rails 4 and a first servo motor 6 on the support 1, the horizontal linear rails 4 and the first screw rod 5 are both arranged in the front-to-back direction, the first screw rod 5 is rotatably arranged on the support 1 and is transmission-connected to the first servo motor 6, the powder tray 2 is slidably arranged on the two horizontal linear rails 4 through the slide 18 at the bottom thereof and a first screw rod sleeve 7 is provided at the bottom thereof in the front-to-back direction, and the first screw rod sleeve 7 is threadedly connected to the first screw rod 5.

[0013] Specifically, a screw sleeve fixing plate 8 is provided in the middle of the front side of the powder tray 2 in the embodiment of the present invention, and a first motor fixing plate 9 is provided at the rear part of the support 1 in the left-right direction, and the first screw sleeve 7 is fixed on the screw sleeve fixing plate 8; the first servo motor 6 is fixed on the front side of the first motor fixing plate 9 in the front-back direction, and the rear end of its driving shaft passes through the first motor fixing plate 9 backward and is transmission-connected with the rear end of the first screw 5; the first screw 5 is rotationally connected with the first motor fixing plate 9 through the first bearing seat 10 on the front side of the first motor fixing plate 9 and its rear end passes through the first motor fixing plate 9 backward.

[0014] Preferably, the horizontal linear rail 4 in the embodiment of the present invention is located in a dustproof cavity formed by an upper oil box 11 and a lower oil box, the lower oil box is fixed to the top of the support 1 along the front-to-back direction, the upper oil box 11 is fixed to the bottom of the powder tray 2 along the front-to-back direction and its front end extends forward relative to the powder tray 2, the horizontal linear rail 4 is fixed to the bottom of the lower oil box, the slide 18 passes through the top of the upper oil box 11 and is fixedly connected to the upper oil box 11, and the upper oil box 11 is slidably and sealedly connected to the lower oil box.

[0015] Among them, the lifting structure in the embodiment of the present invention includes a second screw rod 12 arranged vertically, a second motor fixing plate 13 arranged in the front-to-back direction, a second servo motor 14 on the upper side of the second motor fixing plate 13, a vertical linear rail 15 vertically arranged on the frame and a second screw rod sleeve 16 vertically arranged on the support 1; the second screw rod 12 is rotatably arranged on the second motor fixing plate 13 through a second bearing seat 17 at the upper front part of the second motor fixing plate 13, the upper part of which is threadedly connected with the second screw rod sleeve 16, and the lower end of which passes downward through the second motor fixing plate 13; the second servo motor 14 is vertically fixed at the upper rear part of the second motor fixing plate 13, and its driving shaft passes downward through the second motor fixing plate 13 and is transmission-connected to the lower end of the second screw rod 12.

[0016] On the other hand, an embodiment of the present invention also provides a method for applying glue powder for water drill grinding and polishing, the method comprising: starting from a starting position, after each powdering is completed, the powder tray 2 moves backward in steps of M, and the powder scraping structure 3 is in a scraping state; after a predetermined number of powdering times N, the powder tray 2 moves forward back to the starting position, and the powder scraping structure 3 moves from the front of the powder tray 2 to the rear of the powder tray 2, and the powder scraping structure 3 is in a powder pushing state.

[0017] Wherein, M in the embodiment of the present invention is 3-8 mm, and N is 10-25.

[0018] Among them, the powder scraping structure 3 in the embodiment of the present invention includes a powder scraping rod and a powder carrying rod that can move up and down, and the powder scraping rod and the powder carrying rod are both arranged in the left and right directions and their left and right ends are respectively located on the outside of the corresponding sides of the powder tray 2; when the powder scraping structure 3 is in a scraping state, the powder carrying rod rises and the powder scraping rod descends; when the powder scraping structure 3 is in a powder pushing state, the powder carrying rod descends and the powder scraping rod rises.

[0019] Specifically, the process of returning to the starting position in the embodiment of the present invention is: the powder tray 2 moves forward until the powder rod is located behind the starting position, and the powder scraping structure 3 is in a powder pushing state; the powder tray 2 moves backward at least 2 cm to return to the starting position, and the powder scraping structure 3 is in a scraping state.

[0020] Wherein, after each powder application, the powder tray 2 moves downward to a low position and then moves backward in steps; when the powder tray 2 returns to its position, the powder tray 2 is located at a low position; when powder is applied, the powder tray 2 moves upward.

[0021] The gluing powder applying device and gluing powder applying method for water drill grinding and polishing provided by the present invention have the following advantages:

[0022] (1) The powder scraping structure is stationary, while the powder plate moves; the stepping motion can run at a constant speed at a lower speed, and the movement distance is very short (3-8mm), so that the powder plate has very little dust, which makes the production environment good and reduces the amount of rubber powder used.

[0023] (2) The powder scraping structure switches state every 10-25 operations, making the process simpler and prolonging service life.

[0024] (3) The lifting and rearward and backward movement of the powder tray are all controlled by a servo system. The servo system has the advantages of being unaffected by air supply, controllable speed, basically uniform speed, and accurate position movement. In this patent, the reduction of dust (dust will affect the use of the slide rail) makes it easier to use the servo system.

[0025] (4) This patent uses a variety of means to reduce the impact of dust on the equipment, such as the use of a dust-proof chamber and the setting of the servo motor position. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the powder tray and the horizontal linear rail combination;

[0027] Figure 2 It is a structural diagram of the servo advance and retreat structure;

[0028] Figure 3 It is a structural schematic diagram of the lifting structure;

[0029] Figure 4 It is a schematic diagram of the movement position of the powder scraping structure.

[0030] In the figure: 1 support, 2 powder tray, 3 powder scraping structure, 4 horizontal linear rail, 5 first screw rod, 6 first servo motor, 7 first screw rod sleeve, 8 screw rod sleeve fixing plate, 9 first motor fixing plate, 10 first bearing seat, 11 oiling box, 12 second screw rod, 13 second motor fixing plate, 14 second servo motor, 15 vertical linear rail, 16 second screw rod sleeve, 17 second bearing seat, 18 slide seat. DETAILED DESCRIPTION

[0031] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings.

[0032] Example 1

[0033] See also Figure 1-3Embodiment 1 provides a glue powder coating device for water drill grinding and polishing, the device includes a frame, a support 1 on the frame that can move up and down, a lifting structure between the support 1 and the frame, a powder tray 2 on the support 1, a powder scraping structure 3 on the support 1 and arranged in the left and right directions, and a servo advance and retreat structure between the support 1 and the powder tray 2. The powder tray 2 is specifically a rectangular box arranged in the left and right directions, which contains glue powder, and a translation structure that can drive the fixture to move left and right is arranged above it. The lifting structure is used to drive the support 1 to move up and down, and then drive the powder tray 2 to move up and down. The powder scraping structure 3 is used to scrape the glue powder in the powder tray 2 flat, which includes a powder carrying rod and a powder scraping rod arranged side by side in front and back, and it usually has two states: a scraping state and a powder pushing state. When the powder scraping structure is in the scraping state, the powder carrying rod rises and the powder scraping rod descends; when the powder scraping structure is in the powder pushing state, the powder carrying rod descends and the powder scraping rod rises. Among them, the powder scraping structure 3 is fixed on the support 1, and the powder tray 2 can reciprocate back and forth on the support 1. When applying powder, the servo advance and retreat structure drives the powder tray 2 to move backward from the starting position in steps (the distance of the stepping movement is 3-8mm). After each stepping movement, the lifting structure drives the powder tray 2 to move up and down once to apply powder, and the powder scraping structure 3 is in the scraping state. After applying powder for a predetermined number of times (specifically 10-25 times), the servo advance and retreat structure drives the powder tray 2 to move forward to the starting position, and the powder scraping structure 3 moves from the front of the powder tray 2 to the back of the powder tray 2, and the powder scraping structure 3 is in the powder pushing state.

[0034] Among them, see Figure 1 The servo advance and retreat structure in the embodiment of the present invention includes two horizontal linear rails 4 arranged side by side on the left and right, a first screw rod 5 between the two horizontal linear rails 4, and a first servo motor 6 on the support 1, etc. The horizontal linear rails 4 and the first screw rod 5 are both arranged in the front-to-back direction, the first screw rod 5 is rotatably arranged on the support 1 and is connected to the first servo motor 6 by transmission, the powder tray 2 is slidably arranged on the two horizontal linear rails 4 through the slide 18 at the bottom thereof, and a first screw rod sleeve 7 is arranged at the bottom thereof in the front-to-back direction, and the first screw rod sleeve 7 is threadedly connected to the first screw rod 5. Specifically, a screw rod sleeve fixing plate 8 is arranged in the middle of the front side of the powder tray 2. The screw rod sleeve fixing plate 8 is a vertically arranged rectangular plate, and its lower end extends downward relative to the powder tray 2, and it is perpendicular to the first screw rod sleeve 7. A first motor fixing plate 9 is arranged in the left-right direction at the rear of the support 1, and the first screw rod sleeve 7 is fixed on the screw rod sleeve fixing plate 8. The first servo motor 6 is fixed to the front side of the first motor fixing plate 9 in the front-back direction, and the rear end of its driving shaft passes through the first motor fixing plate 9 backward and is transmission-connected to the rear end of the first screw rod 5 (through a synchronous pulley and a synchronous belt). The first screw rod 5 is rotationally connected to the first motor fixing plate 9 through the first bearing seat 10 on the front side of the first motor fixing plate 9, and its rear end passes through the first motor fixing plate 9 backward.

[0035] Preferably, see Figure 1, the horizontal linear rail 4 in the embodiment of the present invention is located in the dustproof chamber formed by the upper oil box 11 and the lower oil box to prevent dust from entering. The lower oil box is fixed to the top of the support 1 along the front-to-back direction, and it is a rectangular box with an open top. The upper oil box 11 is fixed to the bottom of the powder tray 2 along the front-to-back direction, and its front end extends forward relative to the powder tray 2. It is a rectangular box with an open bottom. The horizontal linear rail 4 is fixed to the bottom of the lower oil box, the slide 18 passes through the top of the upper oil box 11 and is fixedly connected to the upper oil box 11, and the upper oil box 11 is slidably and sealedly connected to the lower oil box.

[0036] Among them, see Figure 3 The lifting structure in the embodiment of the present invention includes a second screw rod 12 arranged vertically, a second motor fixing plate 13 arranged in the front-back direction, a second servo motor 14 on the upper side of the second motor fixing plate 13, a vertical linear rail 15 arranged vertically on the frame, and a second screw rod sleeve 16 arranged vertically on the support 1. The second screw rod 12 is rotatably arranged on the second motor fixing plate 13 through a second bearing seat 17 at the front part of the upper side of the second motor fixing plate 13, and its upper part is threadedly connected with the second screw rod sleeve 16, and its lower end passes through the second motor fixing plate 13 downward. The second servo motor 14 is vertically fixed to the upper rear part of the second motor fixing plate 13, and its driving shaft passes through the second motor fixing plate 13 downward and is drivingly connected with the lower end of the second screw rod 12 (through a synchronous pulley and a synchronous belt).

[0037] Example 2

[0038] Embodiment 2 provides a method for applying glue powder for water diamond grinding and polishing, using the glue powder applying device for water diamond grinding and polishing disclosed in Embodiment 1. The method includes: starting from the starting position, after each powder application is completed, the powder tray 2 moves backward step by step M, at which time the powder scraping structure 3 is in a scraping state, and the speed of the stepping movement can be slow. After applying powder a predetermined number of times N, the powder tray 2 moves forward back to the starting position, and the return speed must be as fast as the existing speed, and the powder scraping structure 3 moves from the front of the powder tray 2 to the rear of the powder tray 2, and at this time the powder scraping structure 3 is in a powder pushing state.

[0039] In the embodiment of the present invention, M is 3-8 mm, specifically 5 mm, and N is 10-25, specifically 15.

[0040] Among them, the powder scraping structure 3 in the embodiment of the present invention includes a powder scraping rod and a powder carrying rod that can move up and down. The powder scraping rod and the powder carrying rod can be synchronously driven in reverse by a cylinder through a swing arm. For details, please refer to the description of application number CN201820202075.1. The powder scraping rod and the powder carrying rod are both arranged in the left and right directions, and their left and right ends are respectively located on the outside of the corresponding sides of the powder tray 2. When the powder scraping structure 3 is in the scraping state, the powder carrying rod rises and the powder scraping rod falls. When the powder scraping structure 3 is in the powder pushing state, the powder carrying rod falls and the powder scraping rod rises.

[0041] Specifically, the process of returning to the starting position in the embodiment of the present invention is as follows: the powder tray 2 moves forward to the rear of the powder carrying rod at the starting position (the powder scraping structure 3 reaches the rear of the powder tray 2), at which time the powder scraping structure 3 is in a powder pushing state. The powder tray 2 moves backward at least 2 cm to return to the starting position to ensure that the powder scraping rod scrapes the rubber powder at the starting position flat, at which time the powder scraping structure 3 is in a scraping flat state.

[0042] After each powder application, the powder tray 2 moves downward to a low position and then moves backward in steps, so that the powder tray 2 can be stabilized after the downward movement, and then moves in steps, so that the movement is simple and dust can be reduced. When the powder tray 2 returns to its position, the powder tray 2 is at a low position; when applying powder, the powder tray 2 moves upward.

[0043] See also Figure 4 , from top to bottom: powder tray 2 is at the starting position, powder tray 2 moves backward in steps, powder tray 2 moves N times in steps to make powder scraping structure 3 located in front of powder tray 2, powder tray 2 moves forward to make powder scraping structure 3 located in the back of powder tray 2, and powder tray 2 moves backward to the starting position.

[0044] The “first” and “second” in this embodiment are only used for distinction and have no other special meanings.

[0045] 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, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for applying glue powder to diamond grinding and polishing, characterized in that: The method for applying glue powder is based on a glue powder applying device for water drill grinding and polishing, and the glue powder applying device for water drill grinding and polishing comprises a frame, a support (1) on the frame and capable of moving up and down, a lifting structure between the support (1) and the frame, a powder plate (2) on the support (1), and a powder scraping structure (3) on the support (1) and arranged in the left and right directions; the powder scraping structure (3) is fixed on the support (1), and the powder plate (2) can reciprocate on the support (1) in the front and back directions; the glue powder applying device also comprises a servo advance and retreat structure between the support (1) and the powder plate (2); The servo advance and retreat structure comprises two horizontal linear rails (4) arranged side by side on the left and right, a first screw rod (5) between the two horizontal linear rails (4) and a first servo motor (6) on the support (1); the horizontal linear rails (4) and the first screw rod (5) are both arranged in the front-back direction; the first screw rod (5) is rotatably arranged on the support (1) and is transmission-connected to the first servo motor (6); the powder tray (2) is slidably arranged on the two horizontal linear rails (4) through a sliding seat (18) at the bottom thereof and a first screw rod sleeve (7) is arranged at the bottom thereof in the front-back direction; the first screw rod sleeve (7) is threadedly connected to the first screw rod (5); A screw sleeve fixing plate (8) is provided in the middle of the front side of the powder disk (2); a first motor fixing plate (9) is provided at the rear of the support (1) in the left-right direction; the first screw sleeve (7) is fixed on the screw sleeve fixing plate (8); the first servo motor (6) is fixed on the front side of the first motor fixing plate (9) in the front-back direction; the rear end of its driving shaft passes through the first motor fixing plate (9) backwards and is transmission-connected with the rear end of the first screw rod (5); the first screw rod (5) is rotationally connected with the first motor fixing plate (9) through a first bearing seat (10) on the front side of the first motor fixing plate (9) and its rear end passes through the first motor fixing plate (9) backwards; The lifting structure comprises a second screw rod (12) arranged vertically, a second motor fixing plate (13) arranged in the front-back direction, a second servo motor (14) on the upper side of the second motor fixing plate (13), a vertical linear rail (15) arranged vertically on the frame, and a second screw rod sleeve (16) arranged vertically on the support (1); the second screw rod (12) is rotatably arranged on the second motor fixing plate (13) through a second bearing seat (17) at the front part of the upper side of the second motor fixing plate (13), the upper part of which is threadedly connected with the second screw rod sleeve (16), and the lower end of which passes downward through the second motor fixing plate (13); the second servo motor (14) is vertically fixed to the upper rear part of the second motor fixing plate (13), and its driving shaft passes downward through the second motor fixing plate (13) and is transmission-connected with the lower end of the second screw rod (12); The method for applying glue powder comprises: when applying powder, the servo advance and retreat structure drives the powder tray (2) to move backward in steps M from a starting position, and after each stepping movement, the lifting structure drives the powder tray (2) to move up and down once to apply powder, and at this time, the powder scraping structure (3) is in a scraping state; after applying powder for a predetermined number of times N, the servo advance and retreat structure drives the powder tray (2) to move forward to the starting position, and the powder scraping structure (3) moves from the front of the powder tray (2) to the rear of the powder tray (2), and at this time, the powder scraping structure (3) is in a powder pushing state; the M is 3-8 mm, and the N is 10-25; The process of returning to the starting position is as follows: the powder tray (2) moves forward until the powder carrying rod is located behind the starting position, at which time the powder scraping structure (3) is in a powder pushing state; the powder tray (2) moves backward at least 2 cm to return to the starting position, at which time the powder scraping structure (3) is in a scraping state; After each powder application, the powder tray (2) moves downward to a low position and then moves backward in steps; when the powder tray (2) returns to its position, the powder tray (2) is located at a low position; when powder is applied, the powder tray (2) moves upward.

2. The sizing powder method according to claim 1, characterized in that: The horizontal linear rail (4) is located in a dustproof cavity formed by an upper oil box (11) and a lower oil box. The lower oil box is fixed to the top of the support (1) in the front-to-back direction. The upper oil box (11) is fixed to the bottom of the powder tray (2) in the front-to-back direction and its front end extends forward relative to the powder tray (2). The horizontal linear rail (4) is fixed to the bottom of the lower oil box. The sliding seat (18) passes through the top of the upper oil box (11) and is fixedly connected to the upper oil box (11). The upper oil box (11) is slidably and sealedly connected to the lower oil box.

3. The sizing powder coating method according to claim 1, characterized in that: The powder scraping structure (3) comprises a powder scraping rod and a powder carrying rod capable of moving up and down, the powder scraping rod and the powder carrying rod are both arranged in the left-right direction and their left and right ends are respectively located on the outside of the corresponding sides of the powder tray (2); when the powder scraping structure (3) is in a scraping state, the powder carrying rod rises and the powder scraping rod falls; when the powder scraping structure (3) is in a powder pushing state, the powder carrying rod falls and the powder scraping rod rises.

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