High-precision blade coater

Abstract

The utility model provides a high-precision blade coater which comprises a coating blade, a support and a vertical micrometer, the coating blade and the vertical micrometer are both arranged on the support, and the vertical micrometer is connected with the coating blade through a ball screw pair so as to adjust the height of the coating blade; the ball screw pair comprises a ball nut and a screw shaft, the ball nut is fixed on the support, the screw shaft penetrates through the ball nut, the top end of the screw shaft is connected with the vertical micrometer, and the bottom end of the screw shaft is rotationally connected with the coating scraper. According to the scraper coater, the ball screw pair is directly connected with the coating scraper, the scheme that a connecting rod abuts against the coating scraper and a spring is used for stiffening in the prior art is replaced, the adjusting precision and the performance stability of the scraper coater are improved, the consistency and the stability of the coating quality are greatly improved, and the coating efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery pole piece coating equipment, in particular to a high-precision scraper coater. Background Art

[0002] The scraper coater is a device that evenly coats the positive and negative electrode material coatings of the battery on the substrate. The coating thickness can range from 10 microns to 3 mm. The substrates include support plates, plastic films, metal foils / plates, glass plates, and wooden boards. On the production line, after the coating enters the scraper blade, it flows out through the gap between the blade and the substrate to form the target coating. The thickness of the target coating is controlled by the gap between the scraper and the substrate. The coating accuracy is affected by many factors such as the coating thickness, the gap accuracy between the scraper and the substrate, the straightness of the scraper blade, the flatness of the coated plate, and the coating characteristics.

[0003] The height of the scraper in the existing scraper coater is controlled by the springs at the left and right ends of the scraper and the micrometers on the upper sides of both ends. The bottom end of the micrometer abuts the scraper through a connecting rod, and the spring is used to ensure that the bottom end of the connecting rod is tightly against the scraper. During the coating process, the scraper vibrates. Due to the internal structure of the micrometer, the micrometer and the connecting rod at the bottom will be affected and vibrate, causing looseness between the connecting rod and the scraper, thereby affecting the coating uniformity and coating accuracy; in addition, during the above process, the spring is subjected to variable forces and is prone to stress fatigue. If this continues for a long time, the micrometer cannot guarantee the adjustment accuracy of the scraper height, which has a significant impact on the coating quality. Therefore, when using it, a lot of manpower and time have to be spent to calibrate the adjustment accuracy of the coater, which not only reduces work efficiency, but also invisibly increases the uncertainty and potential risks of the experiment. Utility Model Content

[0004] The utility model aims to provide a high-precision scraper coater to solve the above-mentioned problems.

[0005] The technical solution of the utility model includes: a high-precision scraper coater, which includes: a coating scraper, a support and a vertical micrometer, the coating scraper and the vertical micrometer are both arranged on the support, and the vertical micrometer is connected to the coating scraper through a ball screw pair to adjust the height of the coating scraper.

[0006] Preferably, the ball screw pair includes a ball nut and a screw shaft, the ball nut is fixed on the support, the screw shaft passes through the ball nut, the top end of the screw shaft is connected to the vertical micrometer, and the bottom end is rotatably connected to the coating scraper.

[0007] Preferably, a connecting plate is provided at the bottom end of the lead screw shaft, an installation groove is provided on the bottom surface of the connecting plate, and a rotating block is provided in the coating blade; the top of the rotating block extends into the installation groove and is fastened to the connecting plate by a horizontal bolt.

[0008] Preferably, the rotating block includes a first rotating part and a second rotating part arranged coaxially. The first rotating part is located between the connecting plate and the second rotating part, and its radial dimension is smaller than that of the second rotating part. A rotating cavity adapted to the outer shape of the rotating block is provided in the coating blade.

[0009] Preferably, the support includes side support plates, top support plates and a connecting component. The two ends of the connecting component are respectively connected to a group of side support plates. The coating blade is located between the two groups of side support plates and is slidably connected thereto. A group of top support plates are provided at the top of the two groups of side support plates, and a group of ball screw pairs are provided on each of the two groups of top support plates. The bottom end of the ball screw pair penetrates through the top support plate and then connects to the coating blade.

[0010] Preferably, the connecting component includes a plurality of connecting rods arranged in parallel. The two ends of the connecting rod respectively penetrate through a group of side support plates, and the side support plates are abutted against the limiting nuts screwed on the connecting rod.

[0011] Preferably, an inverted U-shaped groove is provided on the side support plate. The length of the inverted U-shaped groove is greater than the height of the coating blade, and the two end parts in the length direction of the coating blade are inserted into the inverted U-shaped groove.

[0012] The beneficial effects of the present utility model are as follows: By directly connecting the ball screw pair with the coating blade, replacing the scheme of the connecting rod abutting against the coating blade and the spring stiffening in the traditional technology, the adjustment accuracy and performance stability of the blade coater are improved, the consistency and stability of the coating quality are greatly improved, and the coating efficiency is increased; By limiting the coating blade through the rotating block and the mounting frame, the skew during height adjustment and coating is avoided, and the use performance and accuracy are improved; By installing coating blades with different widths between the side baffles with adjustable spacing, the application range of the coater is increased. Description of the Drawings

[0013] Figure 1 is the front perspective view of the embodiment of the present utility model;

[0014] Figure 2 is the rear perspective view of the embodiment of the present utility model;

[0015] Figure 3 is the connection schematic diagram of the ball screw pair, the vertical micrometer and the coating blade in the embodiment of the present utility model;

[0016] Figure 4 is the attachment of the embodiment of the present utility model Figure 3Enlarged view of the structure at position A in the [device].

[0017] In the figure:

[0018] 100, coating blade; 110, rotating cavity

[0019] 200, support; 210, side support plate; 211, inverted U-shaped groove; 220, top support plate; 230, connecting component; 231, connecting rod; 232, limit nut

[0020] 300, vertical micrometer

[0021] 400, ball screw pair; 410, ball nut; 420, screw shaft

[0022] 500, connecting plate; 510, installation groove

[0023] 600, rotating block; 610, first rotating part; 620, second rotating part

[0024] 700, horizontal bolt Detailed implementation mode

[0025] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0026] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0027] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0028] Refer to the attached Figures 1-4 , this embodiment provides a high-precision doctor blade coater, which includes: a doctor blade 100, a support 200, a vertical micrometer 300, and a ball screw pair 400. The support 200 includes side support plates 210, a top support plate 220, and a connection assembly 230. The two ends of the connection assembly 230 are respectively connected to a group of side support plates 210. The doctor blade 100 is located between the two groups of side support plates 210 and is slidably connected thereto. A group of top support plates 220 are provided at the top of each of the two groups of side support plates 210. A group of ball screw pairs 400 are provided on each of the two groups of top support plates 220. The top end of each ball screw pair 400 is connected to a vertical micrometer 300. The bottom end of the ball screw pair 400 penetrates through the top support plate 220 and then is connected to the doctor blade 100. The support 200 provides support for the doctor blade 100, the ball screw pair 400, and the vertical micrometer 300. The vertical micrometer 300 and the ball screw pair 400 are used to adjust the height of the doctor blade 100, that is, to adjust the height difference between the bottom surface of the doctor blade 100 and the bottom surface of the side support plate 210 to meet different coating thickness requirements.

[0029] Among them, the ball screw pair 400 includes a ball nut 410 and a lead screw shaft 420. The ball nut 410 is vertically penetrated and fixed on the top support plate 220. The lead screw shaft 420 is penetrated and installed in the ball nut 410. The top end of the lead screw shaft 420 is connected to the vertical micrometer 300, and the bottom end is rotatably connected to the doctor blade 100. The lead screw shaft 420 plays a role of hanging and fixing the doctor blade 100. By directly driving the vertical micrometer 300 to change the height of the end of the lead screw shaft 420, the height of the doctor blade 100 is adjusted, avoiding the technical problems existing in the use of springs in the traditional technology (such as easy stress fatigue, need for repeated calibration, etc.). At the same time, due to the high machining accuracy of the ball screw pair 400, compared with ordinary screws, it can achieve micro-feed through the ball nut 410, and accurately adjust the height of the doctor blade 100. This embodiment not only has high adjustment accuracy but also has stable performance during long-term use, greatly improving the consistency and stability of the coating quality and improving the coating efficiency.

[0030] Refer to the attached Figures 3-4, a connecting plate 500 is provided at the bottom end of the lead screw shaft 420. An upwardly recessed mounting groove 510 is provided on the bottom surface of the connecting plate 500. A rotating block 600 is provided in the coating blade 100. The rotating block 600 includes a first rotating portion 610 and a second rotating portion 620 arranged coaxially. The first rotating portion 610 is located between the connecting plate 500 and the second rotating portion 620, and its radial dimension is smaller than that of the second rotating portion 620. A rotating cavity 110 adapted to the outer shape of the rotating block 600 is provided in the coating blade 100. After the top of the rotating block 600 penetrates through the rotating cavity 110, it extends into the mounting groove 510 and is fastened to the connecting plate 500 by a horizontal bolt 700. In this way, not only can the stable connection between the lead screw shaft 420 and the blade be ensured, but also the rotation and height adjustment of the lead screw shaft 420 will not affect the direction of the coating blade 100.

[0031] At the same time, to ensure the stability of the direction of the coating blade 100, an inverted U-shaped groove 211 is also provided on the side support plate 210. The two end portions in the length direction of the coating blade 100 are inserted into the inverted U-shaped groove 211. The length of the inverted U-shaped groove 211 is greater than the height of the coating blade 100, and the width is slightly greater than or equal to the thickness of the coating blade 100. Preferably, the coating blade 100 is in sliding contact with the inner side wall of the inverted U-shaped groove 211, and the plate surface of the coating blade 100 is limited by the inner side wall of the inverted U-shaped groove 211 to prevent it from skewing during the height adjustment and coating processes, thereby improving the coating accuracy.

[0032] In some feasible implementation schemes, the connection assembly 230 for connecting two groups of side support plates 210 includes a plurality of parallel connecting rods 231. The two ends of the connecting rod 231 respectively penetrate through a group of side support plates 210. A limiting nut 232 is screwed on the connecting rod 231. The number of the limiting nuts 232 is configured according to actual usage requirements, and the positions can be set on the adjacent sides, separated sides or both the adjacent sides and the separated sides of the two groups of side support plates 210. By tightening the limiting nut 232 against the plate surface of the side support plate 210, the side support plate 210 is fixed and the spacing is adjusted. By changing the position of the limiting nut 232, the spacing between the two groups of side support plates 210 can be adjusted, and then coating blades 100 with different widths can be installed thereon, which can be applicable to coating substrates with different width dimensions, thereby improving the applicable range of this coater. Optionally, the limiting nut 232 can be selected as a wing nut, a hexagonal nut, etc. according to usage requirements, and no specific limitation is made here.

[0033] Compared with the prior art, in the utility model, the ball screw pair 400 is directly connected to the coating blade 100, replacing the scheme of a connecting rod abutting against the coating blade and a spring for stiffening in the traditional technology, improving the adjustment accuracy and performance stability of the blade coater, greatly enhancing the consistency and stability of the coating quality, and improving the coating efficiency; through the limiting of the coating blade 100 by the rotating block 600 and the mounting bracket, the skew of the coating blade during height adjustment and coating is avoided, improving the service performance and accuracy; by installing coating blades 100 with different widths between the side baffles with adjustable spacing, the application range of the coater is improved.

[0034] The above are the preferred embodiments of the utility model. It should be noted that for those of ordinary skill in the art, without departing from the principle of the utility model, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the utility model.

Claims

1. A high-precision blade coater, characterized in that, Including: A coating doctor blade, a support, and a vertical micrometer. The coating doctor blade and the vertical micrometer are both arranged on the support. The vertical micrometer is connected to the coating doctor blade through a ball screw pair to adjust the height of the coating doctor blade.

2. The high-precision doctor blade coater according to claim 1, characterized in that The ball screw pair includes a ball nut and a screw shaft. The ball nut is fixed on the support. The screw shaft penetrates through the ball nut. Its top is connected to the vertical micrometer, and its bottom is rotatably connected to the coating doctor blade.

3. The high-precision doctor blade coater according to claim 2, characterized in that, A connecting plate is provided at the bottom end of the screw shaft. An installation groove is provided on the bottom surface of the connecting plate. A rotating block is provided in the coating doctor blade. The top of the rotating block extends into the installation groove and is fastened to the connecting plate by a horizontal bolt.

4. The high-precision doctor blade coater according to claim 3, characterized in that, The rotating block includes a first rotating part and a second rotating part arranged coaxially. The first rotating part is located between the connecting plate and the second rotating part, and its radial dimension is smaller than that of the second rotating part. A rotating cavity adapted to the outer shape of the rotating block is provided in the coating doctor blade.

5. The high-precision doctor blade coater according to any one of claims 1-4, characterized in that The support includes side support plates, top support plates, and a connecting component. The two ends of the connecting component are respectively connected to a group of side support plates. The coating doctor blade is located between the two groups of side support plates and is slidably connected thereto. A group of top support plates are respectively provided at the tops of the two groups of side support plates. A group of the ball screw pairs are respectively provided on the two groups of top support plates. The bottom ends of the ball screw pairs penetrate through the top support plates and then are connected to the coating doctor blade.

6. The high-precision doctor blade coater according to claim 5, wherein The connecting component includes a plurality of parallel connecting rods. The two ends of the connecting rods respectively penetrate through a group of side support plates. The side support plates are in contact with the limit nuts screwed on the connecting rods.

7. The high-precision doctor blade coater according to claim 5, characterized in that, An inverted U-shaped groove is provided on the side support plate. The length of the inverted U-shaped groove is greater than the height of the coating doctor blade. The two end parts in the length direction of the coating doctor blade are inserted into the inverted U-shaped groove.

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