Coating machine capable of accurately controlling liquid medicine coating thickness

Abstract

The invention discloses a coating machine capable of accurately controlling the coating thickness of liquid medicine, and belongs to the technical field of coating machines, the coating machine comprises a base and two vertical plates symmetrically arranged on the base, a rolling shaft scraper is arranged between the two vertical plates, dial indicators are installed on the side walls, away from each other, of the two vertical plates, and the dial indicators are arranged between the two vertical plates. The vertical plates are provided with adjusting knobs used for adjusting the position of the roller scraper, a bottom plate is fixed between the two vertical plates, the bottom plate is provided with two movable side plates, and a trough is formed between the two side plates and the bottom plate; a feeding cylinder is fixed between the two vertical plates through a supporting rod, the feeding cylinder is located above the trough, and a motor is installed at the top of the feeding cylinder; the coating thickness can be simply and accurately controlled through the dial indicator, the material can be intermittently supplemented for the trough, the coating in the trough is in dynamic balance, the stable liquid level is kept, the coating is prevented from standing and layering, frequent manual material supplementing is not needed, and the working efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coating machines, in particular to a coating machine capable of precisely controlling the coating thickness of liquid medicine. BACKGROUND

[0002] In many fields such as medicine, electronics, printing and new energy, coating machines, as the core equipment for realizing precise coating of liquid medicine, directly determine the performance and quality of the end product. Especially in the fields of medicine patches, biological test papers and flexible electronic components, which have very high requirements for coating precision, the uniformity and consistency of the coating thickness of liquid medicine are key indicators to ensure the stability of product efficacy, the accuracy of detection or the reliability of circuit performance. At present, mainstream coating machines usually rely on servo drive, pressure feedback or laser thickness measurement technology to achieve precise control of coating thickness, which has a complex structure and relies too much on electronic components, resulting in a high probability of damage. In actual production, the coating machine often needs to be stopped for a short time due to roll replacement, substrate docking, process parameter adjustment, etc., which causes the liquid medicine in the tank to need to be left to stand for a certain period of time. The liquid medicine to be coated is usually a multi-phase dispersion system, which contains solid functional particles (such as medicine powder, conductive particles, nanofiller, etc.), liquid solvent (such as water, organic solvent), film-forming resin and various additives (such as dispersant, thickening agent). Due to the difference in density of each component, and the stability of some liquid medicine systems depends on continuous shear force or dispersion balance, if there is no effective dynamic maintenance measure during the waiting period, stratification will easily occur: the solid particles with higher density will gradually settle at the bottom of the tank, forming a sediment layer; the solvent or light components with lower density may float to the surface layer, causing the concentration and component distribution of the liquid medicine in the tank to be destroyed. This stratification phenomenon will have a serious impact on the subsequent coating quality: when the coating machine is restarted, the liquid medicine taken by the coating mechanism from the tank may be the dilute solution in the upper layer, the concentrated sediment in the lower layer or the non-uniform intermediate phase, directly leading to significant fluctuations in the coating thickness, and even causing defects such as missing coating and material accumulation. For high-precision application scenarios, such problems not only reduce product yield, increase raw material loss and production cost, but also may cause safety risks due to substandard product performance. SUMMARY

[0003] The present application relates to the technical field of coating machines, in particular to a coating machine capable of precisely controlling the coating thickness of liquid medicine.

[0004] The object of the present application can be achieved by the following technical solutions: The application discloses a coating machine capable of precisely controlling the coating thickness of liquid medicine, which comprises a base and two vertical plates symmetrically arranged on the base, a roller blade is arranged between the two vertical plates, a dial gauge is mounted on the side wall of each of the two vertical plates away from each other, an adjusting knob is arranged on the vertical plate for adjusting the position of the roller blade, a bottom plate is fixed between the two vertical plates, two movable side plates are arranged on the bottom plate, and a material groove is formed between the two side plates and the bottom plate; A feeding cylinder is fixed between the two vertical plates through a supporting rod, the feeding cylinder is located above the material groove, a motor is mounted on the top of the feeding cylinder, an output shaft of the motor penetrates through the top wall of the feeding cylinder and is connected with a rotating shaft, a first stirring assembly and a second stirring assembly are arranged on the rotating shaft, and a valve feeding pipe is connected to the top wall of the feeding cylinder. Two discharge pipes are movably arranged on the bottom wall of the feeding cylinder, a blocking rod is fixed on the inner wall of the feeding cylinder and located in the discharge pipe, a lifting rod is fixed on each of the two discharge pipes, and a driving mechanism is arranged in the feeding cylinder and used for driving the two lifting rods to lift and realize intermittent feeding.

[0005] As a further scheme of the application, a driving rod is fixed on the side wall of each of the two side plates away from each other, a threaded hole is formed in each of the two driving rods, a bidirectional screw rod is connected between the two threaded holes, and the two ends of the bidirectional screw rod are rotatably mounted on the two vertical plates, and the bidirectional screw rod is driven by an external driving source.

[0006] As a further scheme of the application, the driving mechanism comprises two boxes and two sleeves, the two boxes are symmetrically fixed on the top wall of the feeding cylinder, the two sleeves are symmetrically fixed on the inner wall of the feeding cylinder, a connecting pipe is connected between the box and the sleeve located on the same side, the lifting rod is in sliding sealing connection with the sleeve, an air inlet pipe is connected to the top wall of the box, one end of the air inlet pipe penetrates through the top wall of the feeding cylinder and extends to the outside of the feeding cylinder, a one-way valve is mounted on the air inlet pipe and the connecting pipe, and a driving assembly is arranged between the rotating shaft and the box.

[0007] As a further scheme of the application, the driving assembly comprises an elliptical block mounted on the rotating shaft, a piston is arranged in the box, one side of the piston is connected with a piston rod, one end of the piston rod penetrates through the side wall of the box and is connected with a driven block, and a first spring is connected between the piston and the side wall of the box.

[0008] As a further scheme of the application, a driven rod is movably arranged on the top wall of the sleeve, the bottom end of the driven rod is fixedly connected with the lifting rod, and a ventilation hole is formed in the top end of the driven rod.

[0009] As a further scheme of the present application: the inner wall of the sleeve is symmetrically provided with a limiting block, the driving rod is symmetrically provided with a limiting rod, the limiting block and the limiting rod are made of rubber, the driving rod is sleeved with a second spring, one end of the second spring is connected with the top wall of the sleeve, and the other end is connected with the limiting rod.

[0010] As a further scheme of the present application: the first stirring assembly and the second stirring assembly are both composed of a plurality of stirring rods, the plurality of stirring rods are fixed on the side wall of the rotating shaft in a circumferential array, and the first stirring assembly is located inside the feeding cylinder, and the second stirring assembly is located outside the feeding cylinder.

[0011] The present application has the following beneficial effects: (1) The present application adjusts the roll scraper to the required coating thickness through the reading of the dial gauge, and the structure is simple and practical. The feeding tank can be intermittently replenished by the discharge pipe on the feeding cylinder and the driving mechanism, so that the coating in the feeding tank is in dynamic balance and will not be completely consumed, the stable liquid level is maintained, the first stirring assembly and the second stirring assembly are matched, on the one hand, the coating can be prevented from being stratified by standing, and on the other hand, the work efficiency is improved without frequent manual feeding. (2) The present application sets two side plates, the distance between the two side plates is adjustable, and the different width requirements of different products are met, and the applicability is high. (3) The driving structure of the present application is composed of a box body, a sleeve and the like. While the rotating shaft rotates, air is continuously injected into the sleeve to pressurize, so that the lifting rod and the discharge pipe slowly descend. When the discharge pipe is separated from the plugging rod, the coating in the feeding cylinder can fall into the feeding tank through the discharge pipe, and the sleeve will automatically exhaust and decompress, so that the discharge pipe resets, and the above process is repeatedly performed, so that the feeding is periodically realized. BRIEF DESCRIPTION OF DRAWINGS

[0012] The present application will be further described below with reference to the drawings.

[0013] Figure 1 is a first perspective view of the whole structure of the present application; Figure 2 is a second perspective view of the whole structure of the present application; Figure 3 is a third perspective view of the whole structure of the present application; Figure 4 is a schematic view of the internal structure of the feeding cylinder of the present application; Figure 5 is a schematic view of the internal structure of the discharge pipe of the present application; Figure 6 is a schematic view of the three-dimensional structure of the box body and the sleeve of the present application; Figure 7 is a schematic view of the internal structure of the box body and the sleeve of the present application.

[0014] Fig. 1 is a base; 2 is a vertical plate; 3 is a bottom plate; 4 is a side plate; 5 is a roller blade; 6 is a micrometer; 7 is a support rod; 8 is a feeding cylinder; 9 is a valve feeding pipe; 10 is a driving rod; 11 is a bidirectional screw; 12 is a motor; 13 is a rotating shaft; 14 is a first stirring assembly; 15 is a second stirring assembly; 16 is a blocking rod; 17 is a lifting rod; 18 is a sleeve; 19 is a box; 20 is an oval block; 21 is an air inlet pipe; 22 is a piston; 23 is a piston rod; 24 is a driven block; 25 is a first spring; 26 is a driven rod; 27 is a vent hole; 28 is a second spring; 29 is a limiting rod; 30 is a limiting block; 31 is a connecting pipe; 32 is a discharging pipe.

[0015] The drawings are only used for illustrative description, and cannot be understood as limitation to the present application; in order to better illustrate the present embodiment, some components in the drawings are omitted, enlarged or reduced, and do not represent the size and shape of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings can be omitted. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0017] Please refer to Figures 1 to 5The present application is a coating machine for precisely controlling the coating thickness of liquid medicine, which comprises a base 1, two vertical plates 2 symmetrically arranged on the base 1, a roller blade 5 arranged between the two vertical plates 2, a micrometer 6 mounted on the side wall of each vertical plate 2 away from each other, an adjusting knob arranged on the vertical plate 2 for adjusting the position of the roller blade 5, a bottom plate 3 fixed between the two vertical plates 2, two movable side plates 4 arranged on the bottom plate 3 to form a trough between the bottom plate 3 and the two movable side plates 4, a feeding cylinder 8 fixed between the two vertical plates 2 by a support rod 7, the feeding cylinder 8 being located above the trough, a motor 12 mounted on the top of the feeding cylinder 8, an output shaft of the motor 12 penetrating through the top wall of the feeding cylinder 8 and connected with a rotating shaft 13, a first stirring assembly 14 and a second stirring assembly 15 arranged on the rotating shaft 13, a valve feeding pipe 9 connected with the top wall of the feeding cylinder 8, two discharge pipes 32 movably arranged on the bottom wall of the feeding cylinder 8, a blocking rod 16 fixed on the inner wall of the feeding cylinder 8 and located inside the discharge pipes 32, a lifting rod 17 fixed on each discharge pipe 32, a driving mechanism arranged in the feeding cylinder 8 for driving the two lifting rods 17 to lift and realize intermittent feeding, the first stirring assembly 14 and the second stirring assembly 15 each being composed of a plurality of stirring rods fixed in a circumferential array on the side wall of the rotating shaft 13, the first stirring assembly 14 being located inside the feeding cylinder 8 and the second stirring assembly 15 being located outside the feeding cylinder 8, a proper amount of coating is first added into the trough, then a proper amount of coating is injected into the feeding cylinder 8 through the valve feeding pipe 9, then the valve is closed to make the feeding cylinder 8 in a sealed state to avoid the volatilization of harmful gases in the coating, the coating machine is operated, the product continuously moves, the coating in the trough is uniformly coated on the product through the roller blade 5, the coating in the trough is continuously consumed and reduced, the motor 12 is started to drive the rotating shaft 13 to rotate, the coating in the feeding cylinder 8 and the trough is stirred through the first stirring assembly 14 and the second stirring assembly 15 to avoid the stratification of the coating when it is at rest, at the same time, the driving mechanism drives the discharge pipes 32 to slowly descend, when the discharge pipes 32 are separated from the blocking rod 16, the coating automatically falls into the trough through the discharge pipes 32, the coating in the trough is in a dynamic balance and will not be completely consumed, so that the stable liquid level is maintained.

[0018] Referring to Figure 2 and Figure 3 , the side wall of each movable side plate 4 away from each other is fixed with a driving rod 10, a threaded hole is formed in each driving rod 10, a two-way screw 11 is connected between the two threaded holes, the two ends of the two-way screw 11 are rotatably installed on the two vertical plates 2, and the two-way screw 11 is driven by an external driving source. According to the different widths of the products, the two-way screw 11 is driven to rotate by the external driving source, so that the two driving rods 10 drive the two movable side plates 4 to move close to or away from each other, which is suitable for different models of products.

[0019] Referring to Figure 4 , Figure 6 andFigure 7 The driving mechanism comprises two boxes 19 fixed symmetrically on the top wall of the feeding cylinder 8 and two sleeves 18 fixed symmetrically on the inner wall of the feeding cylinder 8, a connecting pipe 31 is connected between the box 19 and the sleeve 18 on the same side, the lifting rod 17 is in sliding sealing connection with the sleeve 18, a gas inlet pipe 21 is connected to the top wall of the box 19, one end of the gas inlet pipe 21 extends to the outside of the feeding cylinder 8 through the top wall of the feeding cylinder 8, a one-way valve is installed on the gas inlet pipe 21 and the connecting pipe 31, and a driving assembly is arranged between the rotating shaft 13 and the box 19; the driving assembly comprises an oval block 20 installed on the rotating shaft 13, a piston 22 is arranged in the box 19, one side of the piston 22 is connected with a piston rod 23, one end of the piston rod 23 is connected with a driven block 24 through the side wall of the box 19, and the piston 22 is connected with the side wall of the box 19 through a first spring 25; when the rotating shaft 13 rotates, the oval block 20 rotates constantly, the oval block 20 constantly contacts and extrudes the driven blocks 24 on the two sides, so that the piston 22 moves towards the connecting pipe 31, air in the box 19 is sent into the sleeve 18 through the connecting pipe 31, the piston 22 is reset under the action of the first spring 25 after the oval block 20 is separated from the driven blocks 24, at this time, external air is sucked into the box 19 through the gas inlet pipe 21, the process is repeated constantly, air is constantly sent into the sleeve 18, the air pressure in the sleeve 18 gradually increases, the lifting rod 17 and the discharge pipe 32 are lowered, and automatic feeding can be realized; it should be noted that the one-way valves are installed on the connecting pipe 31 and the gas inlet pipe 21, so that the backflow of gas can be avoided.

[0020] Referring to Figure 6 and Figure 7The top wall of the sleeve 18 movably has a driven rod 26, the bottom end of the driven rod 26 is fixedly connected with the lifting rod 17, the top end of the driven rod 26 is provided with a vent hole 27; the inner wall of the sleeve 18 is symmetrically provided with a limiting block 30, the driven rod 26 is symmetrically provided with a limiting rod 29, the limiting block 30 and the limiting rod 29 are both made of rubber, the driven rod 26 is sleeved with a second spring 28, one end of the second spring 28 is connected with the top wall of the sleeve 18, and the other end is connected with the limiting rod 29; in order to enable the lifting rod 17 and the discharge pipe 32 to automatically reset, when the lifting rod 17 is lowered to the bottom, the second spring 28 is stretched, the limiting rod 29 passes the limiting block 30, at this time, the lifting rod 17 has not separated from the sleeve 18, the vent hole 27 on the driven rod 26 is located at the top wall of the sleeve 18, so that the sleeve 18 is communicated with the inner cavity of the feeding cylinder 8, air can enter the feeding cylinder 8 through the vent hole 27, the air pressure in the sleeve 18 slowly decreases during the exhaust process, the limiting rod 29 is always blocked by the limiting block 30 during the pressure relief process, at this time, the air pressure is still greater than the residual force of the second spring 28, until the air pressure is reduced to "spring force > air pressure thrust", the lifting rod 17 starts to reset, so that the discharge pipe 32 is automatically reset, and the short stay also enables the paint to have sufficient time to discharge, it is worth mentioning that after the gas in the sleeve 18 enters the feeding cylinder 8, the air pressure in the feeding cylinder 8 gradually increases, which is helpful for the discharge of the paint.

[0021] The working principle of the present application is as follows: according to the width of the product, an external driving source (not shown) is used to drive the bidirectional lead screw 11 to rotate, so that the two driving rods 10 drive the two side plates 4 to move close to each other or move away from each other, so as to meet the width requirement of the product; the roller blade 5 is adjusted to the required coating thickness through the reading of the dial gauge when the adjusting knob is rotated; then, an appropriate amount of paint is added in the trough, and then an appropriate amount of paint is injected into the feeding cylinder 8 through the valve feeding pipe 9; after the feeding is completed, the valve is closed to make the feeding cylinder 8 in a sealed state; the coating machine works, and as the product continuously moves, the paint in the trough is uniformly coated on the product through the roller blade 5; at the same time, the motor 12 is started to drive the rotating shaft 13 to rotate, so that the paint in the feeding cylinder 8 and the trough is stirred through the first stirring assembly 14 and the second stirring assembly 15, so as to avoid the stratification of the paint due to static placement; When the shaft 13 rotates and the elliptical block 20 rotates continuously, the elliptical block 20 continuously contacts and extrudes the driven block 24 on both sides, so that the piston 22 moves towards the connecting pipe 31, and the air in the box 19 is sent into the sleeve 18 through the connecting pipe 31; when the elliptical block 20 is separated from the driven block 24, the piston 22 is reset under the action of the first spring 25, at this time, the external air is sucked into the box 19 through the air inlet pipe 21, and the process is repeated continuously, so that the air is continuously sent into the sleeve 18, the air pressure in the sleeve 18 gradually increases, the lifting rod 17 and the discharge pipe 32 are lowered, the discharge pipe 32 is separated from the blocking rod 16, and the paint automatically falls into the trough through the discharge pipe 32, so that automatic feeding is realized; when the lifting rod 17 is lowered to the bottom, the second spring 28 is stretched, the limiting rod 29 passes through the limiting block 30, and the lifting rod 17 is always separated from the sleeve 18, at this time, the air hole 27 on the driven rod 26 is located at the top wall of the sleeve 18, so that the sleeve 18 is communicated with the inner cavity of the feeding cylinder 8, and the air can enter the feeding cylinder 8 through the air hole 27; the air pressure in the sleeve 18 slowly decreases during the exhaust process, the limiting rod 29 is always blocked by the limiting block 30, the air pressure is still greater than the residual force of the second spring 28, so that the lifting rod 17 is temporarily stopped, until the air pressure is reduced to "spring force> air pressure thrust", the lifting rod 17 and the discharge pipe 32 start to reset, and the feeding speed can be adjusted according to the rotating speed of the motor 12, the rotating speed is proportional to the feeding speed, and the actual situation can be adjusted, which will not be repeated here. The above process is repeated continuously, so that intermittent feeding of the trough is realized, the paint in the trough is in dynamic balance, the paint is not completely consumed, the stable liquid level is maintained, manual frequent feeding is not needed, and the working efficiency is improved.

[0022] The above describes one embodiment of the application in detail, but the content described is only the preferred embodiment of the application, and cannot be considered as limiting the scope of the application. Any equivalent changes and improvements made according to the scope of the application should still belong to the patent scope of the application.

Claims

1. A coating machine for accurately controlling the coating thickness of a liquid medicine, comprising a base (1) and two vertical plates (2) symmetrically arranged on the base (1), a roller scraper (5) being arranged between the two vertical plates (2), characterized in that: A micrometer (6) is installed on the side walls of the two vertical plates (2) that are separated from each other. An adjustment knob is provided on the vertical plate (2) for adjusting the position of the roller scraper (5). A bottom plate (3) is fixed between the two vertical plates (2). Two movable side plates (4) are provided on the bottom plate (3). A material trough is formed between the two side plates (4) and the bottom plate (3). A feed barrel (8) is fixed between the two vertical plates (2) via a support rod (7), the feed barrel (8) is located above the material trough, a motor (12) is installed on the top of the feed barrel (8), the output shaft of the motor (12) passes through the top wall of the feed barrel (8) and is connected to a rotating shaft (13), a first stirring component (14) and a second stirring component (15) are provided on the rotating shaft (13), and a feed pipe (9) with a valve is connected to the top wall of the feed barrel (8); Two discharge pipes (32) are movably provided on the bottom wall of the feed barrel (8), and blocking rods (16) are fixed on both sides of the inner wall of the feed barrel (8), and the blocking rods (16) are located inside the discharge pipes (32). Lifting rods (17) are fixed on the two discharge pipes (32), and a driving mechanism is provided in the feed barrel (8) for driving the two lifting rods (17) to move up and down to realize intermittent feeding.

2. A coating machine for accurately controlling the coating thickness of a liquid medicine according to claim 1, characterized in that: A driving rod (10) is fixed on the side walls of the two side panels (4) that are away from each other. A threaded hole is opened on the two driving rods (10). A bidirectional screw (11) is connected between the two threaded holes. The two ends of the bidirectional screw (11) are rotatably mounted on the two vertical panels (2) respectively. The bidirectional screw (11) is driven by an external driving source.

3. A coating machine for accurately controlling the coating thickness of a liquid medicine according to claim 1, characterized in that: The driving mechanism includes two boxes (19) and two sleeves (18), the two boxes (19) are symmetrically fixed on the top wall of the feed barrel (8), and the two sleeves (18) are symmetrically fixed on the inner wall of the feed barrel (8). A connecting pipe (31) is connected between the box (19) and the sleeve (18) on the same side, the lifting rod (17) is connected to the sleeve (18) in a sliding and sealing manner, and an air intake pipe (21) is connected to the top wall of the box (19), one end of the air intake pipe (21) passes through the top wall of the feed barrel (8) and extends to the outside of the feed barrel (8), and a one-way valve is installed on both the air intake pipe (21) and the connecting pipe (31), and a driving component is provided between the rotating shaft (13) and the box (19).

4. A coating machine for accurately controlling the coating thickness of a liquid medicine according to claim 3, characterized in that: The driving assembly comprises an elliptical block (20) mounted on a rotating shaft (13); a piston (22) is provided in the box (19); a piston rod (23) is connected to one side of the piston (22); one end of the piston rod (23) passes through the side wall of the box (19) and is connected to a driven block (24); and a first spring (25) is connected between the piston (22) and the side wall of the box (19).

5. A coating machine for accurately controlling the coating thickness of a liquid medicine according to claim 4, characterized in that: A driven rod (26) is movably provided on the top wall of the sleeve (18), the bottom end of the driven rod (26) is fixedly connected to the lifting rod (17), and a vent hole (27) is provided at the top end of the driven rod (26).

6. A coating machine for accurately controlling the coating thickness of a liquid medicine according to claim 5, characterized in that: A limit block (30) is symmetrically arranged on the inner wall of the sleeve (18), and a limit rod (29) is symmetrically arranged on the driven rod (26). The limit block (30) and the limit rod (29) are both made of rubber. A second spring (28) is sleeved on the driven rod (26), and one end of the second spring (28) is connected to the top wall of the sleeve (18), and the other end is connected to the limit rod (29).

7. The coating machine for accurately controlling the coating thickness of the liquid medicine according to claim 1, characterized in that: The first stirring assembly (14) and the second stirring assembly (15) are both composed of a plurality of stirring rods, which are fixed on the side wall of the rotating shaft (13) in a circular array, and the first stirring assembly (14) is located inside the feeding barrel (8), and the second stirring assembly (15) is located outside the feeding barrel (8).

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