Double-end roller coater for plate processing and control system of double-end roller coater

Abstract

The invention provides a double-end roller coater for plate processing and a control system of the double-end roller coater, and relates to the technical field of plate processing, the double-end roller coater comprises a bottom plate frame, a plurality of groups of distance adjusting mechanisms, a base plate conveying mechanism, a coating mechanism, a drying mechanism and a controller, two base plate conveying mechanisms in the front-back direction are symmetrically arranged on the top of the distance adjusting mechanism in the left-right direction, a plurality of coating mechanisms are arranged on the base plate conveying mechanisms in the front-back direction at intervals, a drying mechanism is fixedly arranged on the rear side of each coating mechanism, and an edge grinding and chamfering mechanism is fixedly arranged on the front side of each coating mechanism; the distance adjusting mechanism, the base plate conveying mechanism, the coating mechanism, the drying mechanism and the edging and chamfering mechanism are electrically connected with the controller, the double-end simultaneous plate side edge coating is achieved, and the production efficiency is improved. And through accurate mechanism adjustment and controller control, it is ensured that the coating is evenly coated on the side edge of the plate, and the coating quality is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plate processing, in particular to a double-end roller coater for plate processing and a control system thereof. BACKGROUND

[0002] In the plate processing industry, a roller coater is a commonly used coating device for uniformly coating paint on the side of the plate. Traditional roller coaters are mostly single-end designed, that is, paint enters the coating roller from one end and is then coated on the side of the plate at one end. However, this single-end designed roller coater has certain limitations in coating efficiency and coating quality. In order to improve the coating efficiency and coating quality, a double-end roller coater has emerged. The double-end roller coater has two or more pairs of coating rollers to realize the coating of putty, primer and topcoat, and paint can enter from both ends at the same time to realize double-end coating or improve the uniformity and efficiency of single-end coating.

[0003] However, the existing double-end roller coater still has some problems in the control system. For example, the speed control of the coating roller is not accurate enough, the transportation is not stable, the plate coated on the non-double-end roller coater cannot be accurately aligned due to the lack of force at one end, resulting in uneven coating thickness; the existing double-end roller coater cannot adapt to the double-end coating of different plates, cannot adjust the distance in time, the paint supply system lacks intelligent control, and cannot realize accurate measurement and supply of paint. SUMMARY

[0004] The present application provides a double-end roller coater for plate processing and a control system thereof to solve at least one of the technical problems in the background art.

[0005] To solve the above technical problems, the present application provides a double-end roller coater for plate processing and a control system thereof, which comprises a bottom frame, a distance adjusting mechanism, a base plate conveying mechanism, a coating mechanism, a drying mechanism and a controller. A plurality of sets of distance adjusting mechanisms are arranged on the bottom frame in front and back. Two groups of base plate conveying mechanisms are symmetrically arranged on the top of the distance adjusting mechanism along the front and back direction. A plurality of sets of coating mechanisms are arranged along the front and back direction between the base plate conveying mechanisms. A drying mechanism is fixedly arranged on the rear side of each set of coating mechanisms. An edge grinding and chamfering mechanism is fixedly arranged on the front side of each set of coating mechanisms. The distance adjusting mechanism, the base plate conveying mechanism, the coating mechanism, the drying mechanism and the edge grinding and chamfering mechanism are electrically connected to the controller.

[0006] Preferably, the front distance adjusting mechanism comprises: linear rails, a pair of linear rails along the left-right direction are fixedly installed on the left front top of the bottom plate frame, a sliding seat is slidably arranged on the linear rails along the left-right direction, a linear rack along the left-right direction is fixedly installed between the front and rear linear rails, a vertical walking motor is fixedly installed on the right end of the sliding seat, a walking gear is fixedly connected to the bottom end of the output shaft of the walking motor, the walking gear is meshingly connected with the linear rack, a fixed seat along the front-rear direction is fixedly installed on the right front top of the bottom plate frame, and the fixed seat and the sliding seat are top structure left-right symmetrical.

[0007] Preferably, the left substrate conveying mechanism comprises: columns, a plurality of columns along the front-rear direction are equidistantly fixedly installed on the top of the fixed seat, a mounting bracket one along the front-rear direction is fixedly installed on the top of the column, a mounting bracket two along the front-rear direction is fixedly installed on the fixed seat below the mounting bracket one, a horizontal pressing plate along the front-rear direction is fixedly connected to the mounting bracket one close to the center side of the linear rail, a conveying motor is fixedly installed on the rear side of the mounting bracket two, a pulley one is fixedly connected to the output shaft end of the conveying motor, a pulley two is fixedly installed on the front side of the mounting bracket two, and the pulley one and the pulley two are connected through a belt one.

[0008] The front end of the left mounting bracket one is fixedly provided with an electric feeder, and the electric feeder is used for conveying the plate into the belt one.

[0009] Preferably, the left coating mechanism comprises: a coating cover, the coating cover is fixedly installed on the top of the middle of the fixed seat, two groups of frame one are symmetrically arranged in the coating cover, a lead screw sliding table module along the left-right direction is fixedly installed on the top of the rear frame one, sliding supports one and two are respectively fixedly installed on the left and right ends of the lead screw sliding table module, a sliding rail two along the left-right direction is fixedly installed below the lead screw sliding table module on the rear frame one, the sliding supports one and two are slidably connected with the sliding rail two, a coating roller along the vertical direction is rotatably connected to the bottom end of the sliding support two, a coating motor along the vertical direction is fixedly installed on the top of the sliding support two, the bottom output shaft end of the coating motor is fixedly connected with the top end of the coating roller, a nozzle is fixedly arranged on the sliding support two and is aligned with the surface of the coating roller, the nozzle is fixedly and continuously connected with a coating pressurizing pump through a pipeline one, an electromagnetic valve one is fixedly installed on the pipeline one, and an input end of the coating pressurizing pump is fixedly connected with a coating liquid storage tank.

[0010] Preferably, the left edge grinding chamfer mechanism comprises: a rotary motor, two oblique rotary motors symmetrically fixed and installed on the middle part of the fixed seat, an output shaft end of each rotary motor fixedly installed with a chamfer grinding wheel, the upper and lower chamfer grinding wheels clamping the upper and lower side edges of the plate, a support frame fixedly installed behind the rotary motor, a left-right direction air cylinder one fixedly installed on the rear side of the support frame, a vertical motor three fixedly connected to the left end of the air cylinder one, a cleaning roller in the upward-downward direction fixedly connected to the top output shaft end of the motor three, a V-shaped support fixedly installed on the front side of the support frame, two vertical rotating wheels rotatably connected to the right end of the V-shaped support, an edge grinding motor fixedly installed on the left end bottom of the V-shaped support, a main pulley fixedly connected to the top output shaft end of the edge grinding motor, the main pulley and the two vertical rotating wheels connected by a grinding belt, and a pushing air cylinder fixedly installed in the middle of the V-shaped support in the left-right direction, the right side push rod end of the pushing air cylinder rotatably connected with a flattening disc, and the flattening disc tightly pressing the grinding belt to the right.

[0011] Preferably, the drying mechanism adopts infrared light wave drying or ultraviolet line drying, and the drying mechanism comprises: an infrared heating box body or an ultraviolet irradiation drying mechanism, the infrared heating box body or the ultraviolet irradiation drying mechanism is fixedly installed on the installation frame two behind the coating cover body, the top of the infrared heating box body or the ultraviolet irradiation drying mechanism is fixedly connected with a ventilation pipe, the ventilation pipe is fixedly connected with a hot air machine at the air inlet end, and the hot air machine is provided with an air inlet at the top.

[0012] The top front section of the fixed seat and the sliding seat is fixedly installed with a hot air flow leveling machine in the front-rear direction, and the hot air flow leveling machine is used for preliminary heating of the plate.

[0013] Preferably, a waste gas treatment mechanism is further provided, and the waste gas treatment mechanism comprises: a waste gas treatment box, the waste gas treatment box is fixedly arranged behind the controller, the top of the waste gas treatment box is fixedly connected with an air suction pump, and a plurality of air suction pipes are fixedly connected with the waste gas treatment box; one group of air suction pipes are communicated with the rear end air outlet of the V-shaped support, and the other group of air suction pipes are fixedly communicated with the infrared heating box body or the ultraviolet irradiation drying mechanism.

[0014] Preferably, a control system of a double-end roller coating machine for plate processing is provided, which is applied to the double-end roller coating machine for plate processing, and is characterized in that an intelligent identification control module is arranged, and the intelligent identification control module comprises:

[0015] A temperature sensor module is arranged to detect the working temperature of the spraying pressure pump and the coating mechanism.

[0016] A hydraulic sensor module is arranged to detect the internal pressure value of the coating mechanism.

[0017] A density sensor module is arranged to detect the density of the sprayed adhesive in the main pipe.

[0018] A flow sensor module for detecting the flow of the sprayed adhesive through the inlet and outlet vertical pipes of the electromagnetic valve;

[0019] A flow rate sensor module for detecting the flow rate of the sprayed adhesive at the opening of the valve port of the electromagnetic valve;

[0020] An alarm for alarming in abnormal conditions;

[0021] A first calculation module for calculating the deviation of the axial hydraulic force of the measured coating mechanism from the theoretical hydraulic force;

[0022] A second calculation module for calculating the evaluation value of the volume change of the liquid coating medium in the measured coating mechanism based on the first calculation module;

[0023] A control module for collecting and processing the data of the sensors, and electrically connected with the first calculation module, the second calculation module, the density sensor module, the flow sensor module, the flow rate sensor module, the temperature sensor module, the hydraulic sensor module and the alarm; and a comparison and judgment module for comparing and judging the normal and abnormal conditions of the volume change of the liquid coating medium in the coating mechanism.

[0024] Preferably, it comprises:

[0025] The first calculation module is calculated based on the following formula one:

[0026] Wherein: F t is the deviation of the axial hydraulic force of the measured coating mechanism from the theoretical hydraulic force, t is the detection termination time, t o is the detection initial time, ρ is the density of the sprayed adhesive in the main pipe detected by the density sensor module; L is the flow length of the sprayed adhesive in the valve cavity of the electromagnetic valve one, Q t is the flow of the electromagnetic valve one at t detected by the flow sensor module, Q0 is the flow of the electromagnetic valve one at t o detected by the flow sensor module, ln is the logarithmic function, e is the natural constant with a value of 2.72; Q is the theoretical flow of the sprayed adhesive through the valve port of the electromagnetic valve, sin is the sine function, α is the included angle between the liquid coating medium flow direction and the valve plane of the electromagnetic valve one, with a value of 65°; v is the average flow rate of the liquid coating medium at the opening of the valve port of the electromagnetic valve one detected by the flow rate sensor module; T2 is the maximum working temperature of the sprayed pressure pump detected by the temperature sensor, T1 is the minimum working temperature of the sprayed pressure pump detected by the temperature sensor.

[0027] Preferably, the second calculation module is calculated based on the following formula two:

[0028] Wherein: V tT is the evaluation value of the liquid coating medium volume change in the coating pressurizing pump in the measured coating mechanism during the intrinsic detection time period t T is the temperature in the measured coating mechanism at time t, T0 is the temperature value in the measured coating mechanism at the initial time, P A P is the measured pressure value in the measured coating mechanism, P2 is the maximum working pressure in the measured coating mechanism, P1 is the minimum working pressure in the measured coating mechanism, P0 is the ideal state pressure value in the measured coating mechanism, V OUT V is the volume of the liquid coating medium to be transported out of the measured coating mechanism; V2 is the maximum volume of the liquid coating medium in the measured coating mechanism, V1 is the minimum volume of the liquid coating medium in the measured coating mechanism;

[0029] The comparison judgment module compares, and when V t is greater than zero, the control module controls the alarm to alarm and mark the position, and timely stops the coating pressurizing pump from working to maintain and replace the abnormal coating mechanism, and when V t is less than or equal to zero, the liquid coating medium volume change in the measured coating mechanism is normal, and maintenance is not required.

[0030] Compared with the prior art, the beneficial effects of the present application are: the double-end roller coating machine provided by the present application mainly consists of a bottom frame, a distance adjusting mechanism, a substrate conveying mechanism, a coating mechanism, a drying mechanism and a controller. When working, the bottom frame serves as the support structure of the entire device, ensuring stable operation of each component. The distance adjusting mechanism adjusts the position of the internal components according to the width of the board, so that the substrate conveying mechanism can accurately align the board and achieve stable conveying. The substrate conveying mechanism is responsible for conveying the board from one end to the other end, maintaining the stability and accurate alignment of the board during the process. The coating mechanism applies paint evenly to the side of the board through coating rollers or nozzles and the like when the board passes. The drying mechanism follows the coating mechanism and uses hot air, infrared radiation or ultraviolet radiation to quickly dry the paint on the side of the board, ensuring that the paint adheres firmly to the side of the board. The edge chamfering mechanism 6 trims the edges of the board. All mechanisms are coordinated by the controller, which accurately controls each mechanism according to the preset program and parameters, ensuring smooth operation of the entire coating process.

[0031] Beneficial effects:

[0032] Improved production efficiency: double-end simultaneous coating greatly shortens the processing cycle of the board and improves production efficiency.

[0033] Ensure coating quality: accurate mechanism adjustment and controller control ensure uniform coating of paint on the side of the board, improving coating quality.

[0034] Strong adaptability: the distance adjusting mechanism can be flexibly adjusted according to the width of the plate, avoiding uneven paint thickness caused by lack of support at the coating end, and being suitable for processing of plates of different sizes.

[0035] High degree of automation: the entire device is automatically controlled by a controller, reducing manual intervention, ensuring product quality, improving production efficiency and safety. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the present application or prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0037] Figure 1 is a three-dimensional schematic view of a double-end roller coater for plate processing according to the present application;

[0038] Figure 2 is a rear view schematic view of a double-end roller coater for plate processing according to the present application;

[0039] Figure 3 is a left view schematic view of a double-end roller coater for plate processing according to the present application;

[0040] Figure 4 is a top view schematic view of a double-end roller coater for plate processing according to the present application;

[0041] Figure 5 is a left side coating mechanism cross-sectional view according to the present application.

[0042] Reference signs:

[0043] 1, bottom frame; 2, distance adjusting mechanism; 3, base plate conveying mechanism; 301, stand; 4, coating mechanism; 401, coating cover; 402, frame one; 403, screw slide module; 404, sliding support one; 405, sliding support two; 406, slide rail two; 407, coating roller; 408, coating motor; 5, drying mechanism; 6, edge grinding and chamfering mechanism; 601, V-shaped support; 602, rotating wheel; 603, edge grinding motor; 604, main pulley; 605, sanding belt; 606, push cylinder; 607, flattening disc; 7, linear slide rail; 8, sliding seat; 9, linear rack; 10, walking motor; 11, walking gear; 12, fixed seat; 13, horizontal pressing plate; 14, mounting frame one; 1401, mounting frame two; 15, conveying motor; 16, pulley one; 17, pulley two; 18, electric feeder; 19, belt one; 20, rotating motor; 21, chamfering sanding wheel; 22, support frame; 23, cylinder one; 24, motor three; 25, cleaning roller; 26, nozzle; 27, electromagnetic valve one; 28, pipeline one; 29, coating pressure pump; 30, coating liquid storage tank; 31, infrared heating box or ultraviolet irradiation drying mechanism; 32, ventilation pipe; 33, air suction port; 34, hot air machine; 35, waste gas treatment mechanism; 36, waste gas treatment box; 37, air extraction pipe; 38, air extraction pump; 39, hot air flow leveling machine; 40, controller. DETAILED DESCRIPTION

[0044] The technical solutions in the present application will be described clearly and completely below with reference to the drawings in the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0045] The preferred embodiments of the present application will be described below with reference to the drawings in the present application. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present application, and not to limit the present application.

[0046] In addition, in the present invention, descriptions such as "first" and "second" are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but this must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0047] The present invention provides the following embodiments

[0048] Example 1

[0049] The embodiment of the present invention provides a double-end roller coating machine for plate processing and its control system, such as Figures 1-3 As shown, a base frame 1, a distance adjustment mechanism 2, a substrate transport mechanism 3, a coating mechanism 4, a drying mechanism 5 and a controller 40, the base frame 1 is provided with several groups of distance adjustment mechanisms 2 at intervals in the front and rear, the top of the distance adjustment mechanism 2 is symmetrically provided with two groups of substrate transport mechanisms 3 along the front and rear directions, the substrate transport mechanism 3 is provided with several groups of coating mechanisms 4 at intervals in the front and rear directions, a group of drying mechanisms 5 is fixedly provided on the rear side of each group of coating mechanisms 4, and a group of edge grinding and chamfering mechanisms 6 is fixedly provided on the front side of each group of coating mechanisms, the distance adjustment mechanism 2, substrate transport mechanism 3, coating mechanism 4, drying mechanism 5 and edge grinding and chamfering mechanism 6 are electrically connected to the controller 40 respectively.

[0050] The working principle and beneficial effects of the above technical solution are as follows:

[0051] The double-end roller coater provided by the present invention primarily consists of a base frame 1, a distance adjustment mechanism 2, a substrate transport mechanism 3, a coating mechanism 4, a drying mechanism 5, and a controller 40. During operation, the base frame 1 serves as the support structure for the entire apparatus, ensuring stable operation of all components. The distance adjustment mechanism 2 adjusts the position of its internal components according to the width of the sheet material, enabling the substrate transport mechanism 3 to accurately align the sheet material and achieve stable transport. The substrate transport mechanism 3 is responsible for transporting the sheet material from one end to the other, maintaining stability and accurate alignment during the process. The coating mechanism 4 evenly applies the coating to the sides of the sheet material using a coating roller or nozzle 26 as the sheet material passes through. The drying mechanism 5 follows the coating mechanism 4 and rapidly dries the coating on the sheet material surface using methods such as hot air, infrared radiation, or ultraviolet radiation, ensuring that the coating adheres firmly to the sheet material's sides. The edge grinding and chamfering mechanism 6 trims the sheet material's edges. All of these mechanisms operate in coordination through the controller 40, which precisely controls each mechanism according to preset programs and parameters to ensure a smooth coating process.

[0052] Beneficial effects:

[0053] Improve production efficiency: Double-end coating at the same time greatly shortens the processing cycle of the plate and improves production efficiency.

[0054] Guaranteed coating quality: Through precise mechanism adjustment and controller 40 control, the coating is ensured to be evenly coated on the surface of the board, thus improving the coating quality.

[0055] Strong adaptability: The distance adjustment mechanism 2 can be flexibly adjusted according to the width of the plate to avoid uneven coating thickness due to lack of support at the coating end, and is suitable for processing plates of different sizes.

[0056] High degree of automation: The entire equipment is automatically controlled by the controller 40, which reduces manual intervention, ensures product quality, and improves production efficiency and safety.

[0057] Example 2

[0058] On the basis of Example 1, Figures 1-2 As shown, the distance adjustment mechanism 2 on the front side includes: a linear slide rail 7, a pair of linear slide rails 7 along the left and right directions are fixedly installed at intervals on the front and rear of the left front top of the base frame 1, a sliding seat 8 is provided on the linear slide rail 7 to slide along the left and right directions, a linear rack 9 along the left and right directions is fixedly installed between the front and rear linear slide rails 7, a vertical walking motor 10 is fixedly installed on the right end of the sliding seat 8, the bottom end of the output shaft of the walking motor 10 is fixedly connected to the walking gear 11, and the walking gear 11 is meshed with the linear rack 9, a fixed seat 12 along the front and rear directions is fixedly installed on the top of the right front side of the base frame 1, and the fixed seat 12 is symmetrical with the top structure of the sliding seat 8.

[0059] The left substrate transport mechanism 3 includes: a plurality of columns 301 fixedly installed on the top of the fixed seat 12 at equal intervals in the front-rear direction, a mounting rack one 14 fixedly installed on the top of the columns in the front-rear direction, a mounting rack two 1401 fixedly installed on the fixed seat below the mounting rack one 14 in the front-rear direction, a horizontal pressing plate 13 fixedly connected to the mounting rack one 14 near the center side of the linear slide rail 7, a transport motor 15 fixedly installed on the rear side of the mounting rack two 1401, a pulley one 16 fixedly connected to the output shaft end of the transport motor 15, and a pulley two 17 fixedly installed on the front side of the mounting rack two 1401, wherein the pulley one 16 and the pulley two 17 are connected through a belt one 19.

[0060] The front end of the left mounting rack one 14 is fixedly provided with an electric feeder 18, which is used to convey the board into the belt one 19.

[0061] The working principle and beneficial effects of the above technical solution are as follows:

[0062] Working principle:

[0063] On the basis of Embodiment 1, the distance adjustment mechanism 2 and the substrate transport mechanism 3 are optimized in this embodiment. The distance adjustment mechanism 2 adopts the cooperation mode of the linear slide rail 7 and the sliding seat 8, and realizes the precise movement of the sliding seat 8 by driving the walking gear 11 to engage with the linear rack 9 through the walking motor 10. This design not only improves the precision of distance adjustment, but also makes the mechanism run more smoothly and reliably. The substrate transport mechanism 3 realizes stable conveying of the board by driving the belt one 19 and the electric feeder 18 in cooperation through the transport motor 15. The design of the belt one 19 and the electric feeder 18 ensures that the board will not deviate or shake during conveying, improving the stability and accuracy of conveying; the substrate transport mechanism: the transport motor 15 drives the belt one 19 to circulate through the synchronous belt, and the electric feeder 18 pushes the board to the middle of the belt, cooperating with the horizontal pressing plate 13 to form stable clamping and conveying, and the conveying speed can be adjusted by the frequency converter (0.5-20 m / min).

[0064] Beneficial effects:

[0065] Improve the distance adjustment precision: the design of the linear slide rail 7 and the sliding seat 8 makes the distance adjustment mechanism 2 more accurate in adjusting the position, ensuring the accurate alignment of the substrate transport mechanism 3 and the board.

[0066] Improve the stability of conveying: the design of the belt one 19 and the electric feeder 18 makes the substrate transport mechanism 3 more stable in conveying the board, avoiding deviation or shaking of the board during conveying.

[0067] Enhanced equipment reliability: optimized mechanism design makes the overall operation of the equipment more stable and reliable, reducing failure rate and maintenance cost.

[0068] Embodiment 3

[0069] Based on embodiment 2, as shown in Figure 1 、 Figure 5 The left coating mechanism 4 includes: a coating cover 401, the middle top of the fixed seat 12 is fixedly installed with the coating cover 401, two groups of frame one 402 are symmetrically arranged inside the coating cover 401, a lead screw sliding table module 403 along the left-right direction is fixedly installed on the top of the rear frame one 402, sliding supports one 404 and two 405 are respectively fixedly installed on the left and right ends of the sliding table of the lead screw sliding table module 403, a sliding rail two 406 along the left-right direction is fixedly installed below the lead screw sliding table module 403 on the rear frame one 402, the sliding supports one 404 and two 405 are slidably connected with the sliding rail two 406, a vertical coating roller 407 is rotatably connected to the bottom end of the sliding support two 405, a vertical coating motor 408 is fixedly installed on the top of the sliding support two 405, the bottom output shaft end of the coating motor 408 is fixedly connected with the top end of the coating roller 407, a nozzle 26 is fixedly arranged on the sliding support two 405, the nozzle 26 is aligned with the surface of the coating roller 407, the nozzle 26 is fixedly connected with a coating pressurizing pump 29 through a pipeline one 28, an electromagnetic valve one 27 is fixedly installed on the pipeline one 28, and the input end of the coating pressurizing pump 29 is fixedly connected with a coating liquid storage tank 30.

[0070] The working principle and beneficial effects of the above technical solution are:

[0071] Working principle:

[0072] The coating mechanism 4 adopts a double-frame design, the lead screw sliding table module 403 of the rear frame drives the sliding support two 405 to move transversely, and adjusts the contact pressure of the coating roller 407 with the plate. The coating motor 408 drives the roller body to rotate to realize coating transfer, the nozzle 26 controls the coating supply amount through the electromagnetic valve one 27, the coating pressurizing pump 29 pumps coating from the coating liquid storage tank 30, forming a closed-loop feeding system, and the coating amount can be adjusted through pressure sensor feedback.

[0073] Beneficial effects:

[0074] Uniform coating: the lead screw sliding table + double support design makes the coating pressure distribution uniform, and the coating film thickness fluctuation is ≤±2μm.

[0075] Precise quantity control: the nozzle + electromagnetic valve realizes variable supply of coating, and the utilization rate of coating is increased by 15%-20%.

[0076] Quick change of coating medium: Modular design supports coating pipeline cleaning and coating medium switching within 30 minutes, suitable for multi-variety production.

[0077] Example 4

[0078] Based on example 2, as shown in Figure 1 、 Figures 3-4 The left edge beveling mechanism 6 includes: a rotary motor 20, two symmetrically inclined rotary motors 20 are fixedly installed in the middle of the fixed seat 12, the output shaft end of each rotary motor 20 is fixedly installed with a chamfering grinding wheel 21, the upper and lower chamfering grinding wheels 21 clamp the upper and lower side edges of the plate, a support frame 22 is fixedly installed behind the rotary motor 20, a left-right directional air cylinder one 23 is fixedly installed on the rear side of the support frame 22, a vertical motor three 24 is fixedly connected to the left end of the air cylinder one 23, an up-down directional cleaning roller 25 is fixedly connected to the top output shaft end of the motor three 24, a V-shaped bracket 601 is fixedly installed on the front side of the support frame 22, two vertical rotating wheels 602 are rotatably connected to the right end of the V-shaped bracket 601, an edge grinding motor 603 is fixedly installed on the left end bottom of the V-shaped bracket 601, a main pulley 604 is fixedly connected to the top output shaft end of the edge grinding motor 603, the main pulley 604 is connected with the two vertical rotating wheels 602 through a grinding belt 605, a pushing air cylinder 606 is fixedly installed in the middle of the V-shaped bracket 601 along the left-right direction, a flattening disc 607 is rotatably connected to the right side push rod end of the pushing air cylinder 606, and the flattening disc 607 tightly presses the grinding belt 605 to the right.

[0079] The working principle and beneficial effects of the above technical solution are:

[0080] Based on example 2, the coating mechanism 4 is optimized in this embodiment. The coating mechanism 4 adopts the mode of rotary motor 20 driving chamfering grinding wheel 21 and cleaning roller 25 cooperation to clamp and coat the upper and lower side edges of the plate. The air cylinder one 23 and the motor three 24 are used to adjust the position and pressure of the cleaning roller 25 to adapt to the coating needs of different plates. The nozzle 26 is supplied with coating medium through the electromagnetic valve one 27 and the coating pressurizing pump 29 to realize accurate coating. This design not only improves the uniformity and precision of coating, but also makes the coating process more flexible and controllable.

[0081] In specific work:

[0082] Edge beveling mechanism: the rotary motor 20 drives the chamfering grinding wheel 21 to roughen the edge of the plate, the air cylinder one 23 pushes the motor three 24 to drive the cleaning roller 25 to remove debris, the edge grinding motor 603 of the V-shaped bracket 601 drives the grinding belt 605 through belt transmission for fine grinding, and the pushing air cylinder 606 adjusts the flattening disc 607 to ensure the tension of the belt body (the tensioning force can be adjusted in the range of 50-200N).

[0083] Beneficial effects:

[0084] Improve the uniformity of chamfering and sanding: the way the rotary motor 20 drives the chamfering and sanding wheel 21 and the cleaning roller 25 cooperates allows the paint to be more evenly applied to the side edges of the board for chamfering and polishing, thereby improving the coating quality.

[0085] Enhance the cleanliness of the side edges of the board: the air cylinder 23 and the motor 24 can adjust the position and pressure of the cleaning roller 25 according to the cleaning needs of the side edges of the board, making the cleaning process more flexible and controllable.

[0086] Improve the utilization rate of the coating medium: the nozzle 26 is supplied with sol or other putty by the electromagnetic valve 27 and the coating pressure pump 29, achieving precise supply and efficient utilization of the coating liquid.

[0087] Three-stage edge grinding process: the rough grinding + cleaning + fine grinding process makes the edge roughness reach Ra0.8μm, improving the appearance quality of the product.

[0088] Example 5

[0089] Based on Example 2, as shown in Figure 1 , Figures 3-5 The drying mechanism adopts infrared light wave drying or ultraviolet drying, and the drying mechanism 5 includes: an infrared heating box or ultraviolet irradiation drying mechanism 31, which is fixedly installed on the mounting frame two 1401 behind the coating cover 401, the top of the infrared heating box or ultraviolet irradiation drying mechanism 31 is fixedly connected with a ventilation pipe 32, the inlet end of the ventilation pipe 32 is fixedly connected with a hot air fan 34, and the top of the hot air fan 34 is provided with an air inlet 33.

[0090] A hot air flow leveling machine 39 is fixedly installed on the top of the front section of the fixed seat 12 and the sliding seat 8, and the hot air flow leveling machine 39 is used for preliminary heating of the board.

[0091] A waste gas treatment mechanism 35 is also provided, which includes: a waste gas treatment box 36, which is fixedly provided behind the controller 40, the top of the waste gas treatment box 36 is fixedly connected with an air suction pump 38, and a plurality of air suction pipes 37 are fixedly connected with the waste gas treatment box 36, one group of air suction pipes 37 are in communication with the rear air outlet of the V-shaped support, and the other group of air suction pipes 37 are fixedly connected with the infrared heating box or ultraviolet irradiation drying mechanism 31.

[0092] The working principle and beneficial effects of the above technical solution are:

[0093] Working principle:

[0094] On the basis of embodiment 2, the drying mechanism 5 and the waste gas treatment mechanism 35 are optimized in this embodiment. The drying mechanism 5 adopts the mode of infrared heating box or ultraviolet irradiation drying mechanism 31 and hot air cooperation to quickly dry the board. The infrared heating box or ultraviolet irradiation drying mechanism 31 can quickly heat the surface of the board, and the hot air can accelerate the heat transfer and paint curing inside the board. The waste gas treatment mechanism 35 purifies the waste gas generated during the drying process to ensure that the discharged waste gas meets the environmental protection requirements.

[0095] Working principle: Drying mechanism: The infrared heating box or ultraviolet irradiation drying mechanism 31 generates radiant heat (power density 30-50kW / m 2 ) or ultraviolet rays to preliminarily cure the coating, and the hot air flow leveling machine 39 eliminates orange peel by circulating hot air (air speed 2-5m / s, temperature 60-80℃). The ventilation pipe 32 and the hot air fan 34 form a hot air circulation loop.

[0096] The waste gas treatment mechanism 35 forms a negative pressure area (negative pressure value -500Pa) at the edge grinding station (rear end of V-shaped support) and the drying station (infrared heating box or ultraviolet irradiation drying mechanism) through the air suction pump 38. The waste gas enters the waste gas treatment box 36 through the air suction pipe 37, and is treated in turn by primary filter screen (filtration efficiency 85%), activated carbon adsorption (adsorption rate 90%) and catalytic combustion chamber (temperature 300-400℃). Finally, it is discharged through the exhaust pipe to meet the emission standard. The controller 40 automatically adjusts the power of the air suction pump according to the VOCs concentration sensor signal.

[0097] Advantages:

[0098] Energy-saving drying: The combination of infrared radiation or ultraviolet irradiation + hot air convection reduces energy consumption by 40%, and the drying time is shortened to 30 seconds.

[0099] Temperature uniformity: Closed-loop hot air circulation design improves drying temperature uniformity by 60%, reducing color difference defects.

[0100] Environmental protection: VOCs removal rate ≥95%, benzene series concentration ≤0.1mg / m 3 , meeting the GB37822-2019 emission standard.

[0101] Energy recovery: The heat generated by catalytic combustion can preheat fresh air through a heat exchanger, improving energy utilization by 10%.

[0102] Improve drying efficiency: The infrared heating box or ultraviolet irradiation drying mechanism 31 and hot air cooperate to quickly dry the board, shorten the drying cycle and improve the production efficiency.

[0103] Protect the environment: waste gas treatment mechanism 35 to the waste gas generated during drying process purification treatment, to ensure that the emissions of waste gas meet environmental requirements, to protect the environment.

[0104] Reduce energy consumption: the optimized drying mechanism 5 and waste gas treatment mechanism 35 design, the overall energy consumption of the device is reduced, improve the energy utilization efficiency.

[0105] Example 6

[0106] On the basis of examples 1-5, a control system for a double-end roller coater for plate processing, applied to the double-end roller coater for plate processing, characterized by an intelligent identification and control module, the intelligent identification and control module comprising:

[0107] Temperature sensor module for detecting the working temperature of the spraying pressure pump and the coating mechanism 4;

[0108] Hydraulic sensor module for detecting the internal pressure value of the coating mechanism 4;

[0109] Density sensor module for detecting the density of the spraying adhesive in the main pipe;

[0110] Flow sensor module for detecting the flow of spraying adhesive into and out of the vertical pipe of electromagnetic valve one 27;

[0111] Flow rate sensor module for detecting the spraying adhesive flow rate at the valve opening of electromagnetic valve one 27;

[0112] Alarm for abnormal situation;

[0113] First calculation module for calculating the deviation value of the measured coating mechanism 4 axial liquid power and theoretical liquid power;

[0114] Second calculation module for calculating the liquid coating medium volume change evaluation value in the measured coating mechanism 4 based on the first calculation module;

[0115] Control module for collecting and processing sensor data, the control module is electrically connected with the first calculation module, the second calculation module, the density sensor module, the flow sensor module, the flow rate sensor module, the temperature sensor module, the hydraulic sensor module and the alarm; comparison and judgment module for comparing and judging the normal and abnormal conditions of the liquid coating medium volume change state in the coating mechanism 4.

[0116] The first calculation module is calculated based on the following formula:

[0117] Where: F t is the deviation value of the axial liquid power in the measured coating mechanism 4 and the theoretical liquid power, t is the detection termination time, t ois the initial moment of detection, ρ is the density of the spray adhesive inside the main pipe detected by the density sensor module; L is the flow length of the spray adhesive in the valve cavity of the solenoid valve 27, Q t is the flow rate of the solenoid valve 27 at time t detected by the flow sensor module, and Q0 is the flow rate of the solenoid valve 27 at time t detected by the flow sensor module. o where ln is the logarithmic function, e is a natural constant with a value of 2.72; Q is the theoretical flow rate of the spray adhesive through the valve port of the solenoid valve 27, sin is the sine function, α is the angle between the flow direction of the liquid coating medium and the valve plane of the solenoid valve 27, and its value is 65°; v is the average flow rate of the liquid coating medium at the valve port opening of the solenoid valve 27 detected by the flow sensor module; T2 is the maximum operating temperature of the spray pressure pump detected by the temperature sensor, and T1 is the minimum operating temperature of the spray pressure pump detected by the temperature sensor.

[0118] The second calculation module is calculated based on the following formula 2:

[0119] Where: V t T is the estimated value of the volume change of the liquid coating medium in the coating pressure pump 29 of the coating mechanism 4 under test during the test period, t is the temperature inside the coating mechanism 4 at time t, T0 is the temperature value inside the coating mechanism 4 at the initial time, P A is the measured pressure value in the coating mechanism 4, P2 is the highest working pressure in the coating mechanism 4, P1 is the lowest working pressure in the coating mechanism 4, P0 is the ideal pressure value in the coating mechanism 4, V OUT is the volume of the liquid coating medium to be transported out of the coating mechanism 4 under test; V2 is the maximum volume of the liquid coating medium in the coating mechanism 4 under test, and V1 is the minimum volume of the liquid coating medium in the coating mechanism 4 under test;

[0120] The comparison module performs comparison, when V t When it is greater than zero, the control module controls the alarm to sound an alarm and mark the position, and stops the coating pressure pump 29 in time to repair and replace the abnormal coating mechanism 4. t When it is less than or equal to zero, the volume change of the liquid coating medium in the coating mechanism 4 under test is normal and no maintenance is required.

[0121] The working principle and beneficial effects of the above technical solution are as follows:

[0122] Working principle:

[0123] The control system is optimized in this embodiment. The control system adopts an intelligent identification and control module, which monitors the working state of the coating mechanism 4 in real time through temperature sensor module, hydraulic sensor module, density sensor module, flow sensor module, and flow rate sensor module. The first calculation module and the second calculation module calculate the deviation value of the measured axial hydraulic force of the coating mechanism 4 from the theoretical hydraulic force and the evaluation value of the volume change of the liquid coating medium according to the real-time monitoring data. The comparative judgment module judges the normal and abnormal conditions of the volume change of the liquid coating medium in the coating mechanism 4 according to the calculation results, and alarms through the alarm. The controller controls the coating mechanism 4 accurately according to the data of each sensor and the calculation results, ensuring the smooth progress of the coating process.

[0124] Advantages:

[0125] Improved monitoring accuracy: The working state of the coating mechanism 4 is monitored in real time by multiple sensors, improving the monitoring accuracy and accuracy.

[0126] Enhanced control flexibility: The design of the first calculation module and the second calculation module combined with the comparative judgment module enables the control system to flexibly control the coating mechanism 4 according to the real-time monitoring data and calculation results, improving the flexibility and accuracy of the control.

[0127] Improved equipment safety: When the volume of the liquid coating medium in the coating mechanism 4 changes abnormally, the alarm can timely alarm and mark the position, reminding the operator to handle in time, avoiding potential safety hazards. At the same time, the controller can also stop the work of the coating pressurizing pump 29 for maintenance and replacement of the abnormal coating mechanism 4, ensuring the safe operation of the equipment.

[0128] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A double-end roller coater for plate processing, characterized in that: include: A base frame (1), a distance adjustment mechanism (2), a substrate transport mechanism (3), a coating mechanism (4), a drying mechanism (5) and a controller (40); the base frame (1) is provided with a plurality of distance adjustment mechanisms (2) at intervals in the front and rear directions; two groups of substrate transport mechanisms (3) are symmetrically provided on the top of the distance adjustment mechanism (2) along the front and rear directions; the substrate transport mechanism (3) is provided with a plurality of coating mechanisms (4) at intervals in the front and rear directions; a group of drying mechanisms (5) is fixedly provided on the rear side of each group of coating mechanisms (4); a group of edge grinding and chamfering mechanisms (6) is fixedly provided on the front side of each group of coating mechanisms; the distance adjustment mechanism (2), the substrate transport mechanism (3), the coating mechanism (4), the drying mechanism (5) and the edge grinding and chamfering mechanism (6) are respectively electrically connected to the controller (40).

2. A double-end roller coater for plate processing according to claim 1, characterized in that: The distance adjustment mechanism (2) on the front side comprises: a linear slide rail (7); a pair of linear slide rails (7) along the left and right directions are fixedly installed at intervals on the top of the left front side of the base frame (1); a sliding seat (8) is provided on the linear slide rail (7) for sliding along the left and right directions; a linear rack (9) along the left and right directions is fixedly installed between the front and rear linear slide rails (7); a vertical travel motor (10) is fixedly installed on the right end of the slide seat (8); the bottom end of the output shaft of the travel motor (10) is fixedly connected to a travel gear (11); the travel gear (11) is meshed with the linear rack (9); a fixed seat (12) along the front and back directions is fixedly installed on the top of the right front side of the base frame (1); the fixed seat (12) and the top structure of the slide seat (8) are symmetrical on the left and right.

3. A double-end roller coater for plate processing according to claim 2, characterized in that: The substrate transport mechanism (3) on the left side includes: a column (301), a plurality of columns are fixedly installed at equal intervals on the top of the fixed seat (12) along the front-back direction, a mounting frame 1 (14) is fixedly installed on the top of the column along the front-back direction, a mounting frame 2 (1401) is fixedly installed on the fixed seat below the mounting frame 1 (14) along the front-back direction, the mounting frame 1 (14) is fixedly connected to the horizontal lower pressure plate (13) along the front-back direction near the center side of the linear slide rail (7), a transport motor (15) is fixedly installed on the rear side of the mounting frame 2 (1401), the output shaft end of the transport motor (15) is fixedly connected to the pulley 1 (16), the front side of the mounting frame 2 (1401) is fixedly installed with the pulley 2 (17), and the pulley 1 (16) and the pulley 2 (17) are connected through a belt 1 (19); The front end of the left mounting frame 1 (14) is fixedly provided with an electric feeder (18), which is used for conveying the plate material onto the belt 1 (19).

4. A double-end roller coater for plate processing according to claim 3, characterized in that: The coating mechanism (4) on the left side includes: a coating cover (401), the coating cover (401) is fixedly installed on the top of the middle part of the fixing seat (12), two sets of frames (402) are symmetrically arranged in the front and back of the coating cover (401), the top of the rear frame (402) is fixedly installed with a screw slide module (403) along the left and right directions, the left and right ends of the slide of the screw slide module (403) are fixedly installed with a sliding support (404) and a sliding support (405), respectively, the rear frame (402) is fixedly installed with a slide rail (406) along the left and right directions below the screw slide module (403), and the sliding support (404) and the sliding support (405) are both connected to the slide rail. The second sliding support (406) is connected to the left and right slidingly, the bottom end of the second sliding support (405) is rotatably connected to the vertical coating roller (407), the top of the second sliding support (405) is fixedly installed with a vertical coating motor (408), the bottom output shaft end of the coating motor (408) is fixedly connected to the top of the coating roller (407), the second sliding support (405) is fixedly provided with a nozzle (26), the nozzle (26) is aligned with the surface of the coating roller (407), the nozzle (26) is fixedly connected to the coating pressure pump (29) through the pipe (28), the solenoid valve (27) is fixedly installed on the pipe (28), and the input end of the coating pressure pump (29) is fixedly connected to the coating liquid storage tank (30).

5. A double-end roller coater for plate processing according to claim 4, characterized in that: The left side grinding and chamfering mechanism (6) includes: a rotating motor (20), two symmetrical and oblique rotating motors (20) are fixedly installed in the middle of the fixed seat (12), and a chamfering grinding wheel (21) is fixedly installed on the output shaft end of each rotating motor (20), and the upper and lower chamfering grinding wheels (21) clamp the upper and lower side edges of the plate, and a support frame (22) is fixedly installed at the rear of the rotating motor (20), and a cylinder 1 (23) in the left and right directions is fixedly installed on the rear side of the support frame (22), and the left end of the cylinder 1 (23) is fixedly connected to the vertical motor 3 (24), and the top output shaft end of the motor 3 (24) is fixedly connected to the cleaning roller (25) in the upper and lower directions. A V-shaped bracket (601) is fixedly installed on the front side of (22), the right end of the V-shaped bracket (601) is rotatably connected to two vertical rotating wheels (602), an edge grinding motor (603) is fixedly installed on the bottom of the left end of the V-shaped bracket (601), the top output shaft end of the edge grinding motor (603) is fixedly connected to a main pulley (604), the main pulley (604) and the two vertical rotating wheels (602) are connected via a grinding belt (605), a pushing cylinder (606) is fixedly provided in the middle of the V-shaped bracket (601) along the left and right directions, the right push rod end of the pushing cylinder (606) is rotatably connected to a flattening plate (607), and the flattening plate (607) presses the grinding belt (605) to the right.

6. A double-end roller coater for plate processing according to claim 5, characterized in that: The drying mechanism adopts infrared light wave drying or ultraviolet drying, and the drying mechanism (5) includes: an infrared heating box or an ultraviolet irradiation drying mechanism (31); the infrared heating box or the ultraviolet irradiation drying mechanism (31) is fixedly installed on the second mounting frame (1401) behind the coating cover (401); the top of the infrared heating box or the ultraviolet irradiation drying mechanism (31) is fixedly connected to the ventilation pipe (32); the air inlet end of the ventilation pipe (32) is fixedly connected to the hot air blower (34); the top of the hot air blower (34) is provided with an air suction port (33); A hot air leveling machine (39) is fixedly installed on the front section of the top of the fixed seat (12) and the sliding seat (8) along the front-back direction, and the hot air leveling machine (39) is used for preliminarily heating the plate.

7. A double-end roller coater for plate processing according to claim 6, characterized in that: An exhaust gas treatment mechanism (35) is also provided, and the exhaust gas treatment mechanism (35) includes: an exhaust gas treatment box (36), an exhaust gas treatment box (36) is fixedly provided behind the controller (40), the top of the exhaust gas treatment box (36) is fixedly connected to an exhaust pump (38), and a plurality of exhaust pipes (37) are fixedly connected to the exhaust gas treatment box (36), one group of exhaust pipes (37) is connected to the rear end air outlet of the V-shaped bracket, and the other group of exhaust pipes (37) is fixedly connected to an infrared heating box or an ultraviolet irradiation drying mechanism (31).

8. A control system for a double-end roller coater for plate processing, applied to a double-end roller coater for plate processing as claimed in any one of claims 1 to 7, characterized in that: It is equipped with an intelligent recognition and control module, which includes: A temperature sensor module for detecting the operating temperature of the spray pressure pump and the coating mechanism (4); A hydraulic sensor module for detecting the internal pressure value of the coating mechanism (4); Density sensor module, used to detect the density of the adhesive sprayed inside the main pipe; A flow sensor module for detecting the flow of adhesive sprayed into and out of the vertical pipe through the solenoid valve 1 (27); A flow rate sensor module for detecting the flow rate of the spray adhesive at the valve opening of the solenoid valve (27); Alarm, used to sound an alarm in case of abnormal situation; A first calculation module is used to calculate the deviation between the axial fluid force of the coating mechanism (4) under test and the theoretical fluid force; a second calculation module for calculating, based on the first calculation module, an evaluation value of a volume change of a liquid coating medium in the coating mechanism (4) under test; A control module is used to collect and process the data of each sensor, and the control module is electrically connected to the first calculation module, the second calculation module, the density sensor module, the flow sensor module, the flow velocity sensor module, the temperature sensor module, the hydraulic sensor module and the alarm; and a comparison and judgment module is used to compare and judge the normal and abnormal conditions of the volume change state of the liquid coating medium in the coating mechanism (4).

9. The control system of a double-end roller coater for plate processing according to claim 8, characterized in that: include: The first calculation module calculates based on the following formula 1: Among them: F t is the deviation between the axial fluid force and the theoretical fluid force in the coating mechanism (4) under test, t is the detection end time, t o is the initial moment of detection, ρ is the density of the spray adhesive inside the main pipe detected by the density sensor module; L is the flow length of the spray adhesive in the valve cavity of the solenoid valve (27), Q t is the flow rate of the electromagnetic valve (27) at time t detected by the flow sensor module, Q0 is the flow rate of the electromagnetic valve (27) at time t detected by the flow sensor module o The flow rate at this time, ln is a logarithmic function, e is a natural constant with a value of 2.72; Q is the theoretical flow rate of the spray adhesive through the valve port of the solenoid valve (27), sin is a sine function, α is the angle between the flow direction of the liquid coating medium and the valve plane of the solenoid valve (27), and the value is 65°; v is the average flow rate of the liquid coating medium at the valve port opening of the solenoid valve (27) detected by the flow rate sensor module; T2 is the maximum operating temperature of the spray pressure pump detected by the temperature sensor, and T1 is the minimum operating temperature of the spray pressure pump detected by the temperature sensor.

10. The control system of a double-end roller coater for plate processing according to claim 9, characterized in that: The second calculation module is calculated based on the following formula 2: Where: V t T is the estimated value of the volume change of the liquid coating medium in the coating pressure pump (29) within the coating mechanism (4) under test during the test period, t is the temperature inside the coating mechanism (4) at time t, T0 is the temperature value inside the coating mechanism (4) at the initial time, P A is the actual pressure value in the coating mechanism (4) under test, P2 is the highest working pressure in the coating mechanism (4) under test, P1 is the lowest working pressure in the coating mechanism (4) under test, P0 is the ideal pressure value in the coating mechanism (4) under test, V OUT is the volume of the liquid coating medium to be transported out of the coating mechanism (4) under test; V2 is the maximum volume of the liquid coating medium in the coating mechanism (4) under test, and V1 is the minimum volume of the liquid coating medium in the coating mechanism (4) under test; The comparison module performs comparison. When V t When it is greater than zero, the control module controls the alarm to sound an alarm and mark the position, and stops the coating pressure pump (29) in time to repair and replace the abnormal coating mechanism (4). t When the value is less than or equal to zero, the volume change of the liquid coating medium in the coating mechanism (4) under test is normal and no maintenance is required.

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