Film coating correction plate structure capable of rapidly adjusting rack

Abstract

The utility model discloses a coating correction plate structure capable of quickly adjusting a rack. The coating correction plate structure comprises a supporting plate, a cover plate, a rack assembly and an adjusting assembly, a plurality of limiting blocks are arranged on the supporting plate at intervals, a limiting groove is formed between every two adjacent limiting blocks, the side faces, located in the limiting grooves, of the limiting blocks are provided with a plurality of convex arc parts and notches located below the convex arc parts, and the supporting plate is provided with a first side and a second side; the cover plate covers the limiting blocks and is fixedly connected with the limiting block on the outermost side of the supporting plate. An adjusting through groove is defined by the supporting plate, the limiting blocks and the cover plate. The rack assembly comprises a plurality of racks inserted into the adjusting through groove and attached to the upper surface of the limiting block. The adjusting assembly comprises a plurality of sliding positioning nuts and a plurality of knurled screws; the side face of the upper portion of the sliding positioning nut is in sliding fit with the convex arc portion, the lower portion of the sliding positioning nut is in limiting fit with the inner wall of the notch, and each knurled screw correspondingly penetrates through one rack and is in threaded connection with the sliding positioning nut below the rack.

Description

Technical Field

[0001] The utility model relates to the technical field of glass coating processing, in particular to a coating correction plate structure capable of quickly adjusting a rack. Background Art

[0002] Vacuum sputtering coating is a process that improves the surface properties of glass by depositing a thin film on it. Using a vacuum sputtering coater, an inert gas is first generated through glow discharge to generate charged ions. These ions are accelerated by an electric field and then collide with the target surface, knocking target atoms out of the target. The target atoms, carrying sufficient kinetic energy, reach the substrate surface for deposition, effectively coating the substrate. The coating machine correction plate is a key component of the vacuum sputtering coater. By adjusting its shape and position, it alters the trajectory of the sputtered particles, making their distribution more uniform and ensuring uniform thickness of the deposited film. The correction plate also blocks non-sputtered matter, preventing it from contaminating the coated surface.

[0003] At present, the common adjustment baffle structure in the industry (such as Figure 1 (As shown) the carrier plate 1 is locked on the coating equipment by screws, and then the baffle 2 is fixed to the carrier plate 1 by screw connection to realize the installation of the adjustable baffle structure. Among them, a U-shaped groove 3 is provided at the end of the baffle 2, and a plurality of screw holes 4 corresponding to the U-shaped groove 3 are provided on the carrier plate 1. By placing the U-shaped groove 3 at different screw holes 4 and fixing it, the length of the baffle 2 can be adjusted, and then the interception shape of each part can be adjusted to ensure the uniformity of the coating. However, in the above-mentioned adjustable baffle structure, since the baffle is provided with a U-shaped groove, the target material will be deposited and fill the U-shaped groove after coating, making it difficult to move and adjust the baffle, and the baffle is easily scrapped, which increases the cost of the adjustable baffle structure. In addition, since the baffle and the carrier are adjusted by locking with screws, the adjustment distance of the baffle is limited by the length of the U-shaped groove opening, and the adjustable range is small. Baffles of different lengths need to be used for secondary adjustment. There are many types of baffles involved, which increases the production and storage costs. In addition, a single baffle needs to be fixed to the carrier plate with multiple screws, so the screws need to be frequently disassembled and assembled to achieve long-distance adjustment, which is inconvenient for production operations. Utility Model Content

[0004] Based on this, it is necessary to provide a coating correction plate structure that can quickly adjust the rack to address the above shortcomings. The coating correction plate structure can avoid target material deposition and filling, extend the service life of the rack, and the rack length adjustment range is large. Only a single rack is required to meet a variety of length adjustments. It is easy to adjust and reduces the difficulty of operation.

[0005] A coating correction plate structure capable of quickly adjusting a rack, comprising:

[0006] A support plate, wherein a plurality of spaced limit blocks are fixed on the upper surface of the support plate, a limit groove is formed between two adjacent limit blocks, a side surface of the limit block located in the limit groove is provided with a plurality of convex arc portions spaced along the length direction of the limit groove, and a notch located below the convex arc portion and passing through two opposite end surfaces of the limit block, the support plate having a first side corresponding to the notch at one end of the limit groove and a second side corresponding to the notch at the other end of the limit groove;

[0007] A cover plate, the cover plate is located above the support plate and covers the limit blocks, two opposite sides of the cover plate are fixedly connected to the outermost limit blocks on the support plate, and the support plate, the limit blocks and the cover plate together form an adjustment slot;

[0008] a rack assembly comprising a plurality of racks arranged side by side and corresponding one to each of the limit slots, the racks being inserted into the adjustment slots and abutting against the upper surface of the limit block, with at least one end of the racks extending out of the adjustment slot and forming a steam interception portion on a first side; and

[0009] The adjusting component includes a plurality of sliding positioning nuts located below the rack and slidingly inserted into each limiting groove one by one, and a plurality of knurled screws located above the rack and corresponding to each sliding positioning nut one by one; the cross-section of the sliding positioning nut is an inverted T-shaped structure, the upper side surface of the sliding positioning nut slides with the convex arc portion, the lower part of the sliding positioning nut is limitedly fitted with the inner wall of the notch along the thickness direction of the rack, and the width of the lower part of the sliding positioning nut is smaller than the width of the lower part of the limiting groove, each knurled screw is correspondingly passed through a rack and is threadedly connected to the sliding positioning nut below the rack; the knurled screw squeezes the rack when rotating in a first direction so that the rack is pressed against the limiting block; when the knurled screw rotates in a second direction and is subjected to tension, it pushes the rack to slide along the limiting groove to adjust the length of the rack extending out of the adjusting slot.

[0010] In one embodiment, the coating correction plate structure further includes two fixing blocks fixed one-to-one to the upper surface of the outermost limiting block of the support plate, and the two ends of the cover plate are fixedly connected to the two fixing blocks respectively.

[0011] In one embodiment, a slot penetrating the lower surface of the fixing block is provided on the lower portion of one side of the fixing block adjacent to the adjustment slot, and a mounting slot communicating with the slot is provided on the upper surface of the fixing block, wherein a glass ball screw is inserted into the mounting slot; pins that can be inserted into the slot are respectively provided on two opposite sides of the cover plate, and a groove or a concave hole extending along the length direction of the limiting slot is provided on the upper surface of the pin, and the bottom of the glass ball screw is limitedly engaged with the groove or the concave hole when the pin is inserted into the slot.

[0012] In one embodiment, an extension arm extending toward the support plate is provided on a side of the cover plate, and a distal end of the extension arm is bent toward a direction away from the adjustment slot to form the pin.

[0013] In one embodiment, both ends of the cover plate abut against the upper surface of the fixing block, and both ends of the cover plate are screw-connected to the fixing block.

[0014] In one embodiment, the cover plate is provided with a first baffle located on the first side and extending toward the support plate, and a second baffle located on the second side and extending toward the support plate.

[0015] In one embodiment, a straight connecting portion is provided between adjacent convex arc portions.

[0016] In one embodiment, a concave arc portion is provided between adjacent convex arc portions.

[0017] In one embodiment, the sliding positioning nut includes a vertical portion threadedly connected to the knurled screw and two horizontal portions relatively arranged at the lower portions of two opposite sides of the vertical portion. The horizontal portion is slidably embedded in the notch, and a avoidance inclined surface is provided on the lower surface edge of the horizontal portion. A avoidance space is formed between the avoidance inclined surface and the inner wall of the notch.

[0018] In one embodiment, the limit block is connected to the support plate by screws.

[0019] The coating correction plate structure of the rack that can be quickly adjusted is implemented in the present invention. Several limit blocks are installed on the support plate to form a limit groove. The rack is installed by using a knurled screw and a sliding positioning nut. The rack is positioned by rotating the knurled screw. There is no need to set a hole groove structure on the rack. The problem of difficulty in moving the rack caused by target material deposition filling the hole groove can be avoided. The service life of the rack is extended and the use cost of the correction plate structure is reduced. The extended length of the rack is adjusted by rotating and pulling the knurled screw at the same time. The adjustable length of the rack is expanded to the entire length of the rack, which increases the adjustable range of the extended length of the rack. There is no need to use multiple racks of different lengths for secondary adjustment, which reduces the difficulty of adjusting the extended length of the rack and the cost of producing and storing the rack. By arranging a convex arc portion on the limit block, the sliding positioning nut contacts the inner side surface of the limit groove when moving in the limit groove, thereby reducing the sliding resistance of the sliding positioning nut and the rack, reducing the difficulty of operating and adjusting the extended length of the rack, and improving the adjustment efficiency of the extended length of the rack. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of a traditional regulating baffle structure;

[0021] Figure 2 This is a schematic structural diagram of a coating correction plate structure in one embodiment of the present invention;

[0022] Figure 3This is a schematic diagram of the exploded structure of the coating correction plate structure in one embodiment of the present utility model;

[0023] Figure 4 This is a schematic structural diagram of a coating correction plate structure in one embodiment of the present invention with the cover plate removed;

[0024] Figure 5 This is a top view of the coating correction plate structure in one embodiment of the present invention with the cover plate removed;

[0025] Figure 6 This is a schematic structural diagram of a coating correction plate structure in one embodiment of the present invention;

[0026] Figure 7 This is a structural schematic diagram of another state of the coating correction plate structure in one embodiment of the present invention;

[0027] Figure 8 for Figure 3 A schematic diagram of the partially enlarged structure of part A in the embodiment shown;

[0028] Figure 9 for Figure 3 A schematic diagram of the partially enlarged structure of part B in the embodiment shown;

[0029] Figure 10 This is a partial enlarged view of the first installation stage of the cover plate in one embodiment of the present invention;

[0030] Figure 11 This is a partial enlarged view of the second installation stage of the cover plate in one embodiment of the present invention;

[0031] Figure 12 This is a partially enlarged view of the third installation stage of the cover plate in one embodiment of the present invention. DETAILED DESCRIPTION

[0032] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0033] This utility model discloses a coating correction plate structure that can quickly adjust the rack. The coating correction plate structure can avoid target material deposition and filling, extend the service life of the rack, and has a wide range of rack length adjustment. Only a single rack is needed to meet various length adjustments. It is easy to adjust and reduces the difficulty of operation. Figure 2-7 The coating correction plate structure of this embodiment includes a support plate 100, a cover plate 200, a rack assembly 300, and an adjustment assembly 400. A plurality of spaced-apart limit blocks 110 are fixed to the upper surface of the support plate 100, with a limit slot 120 formed between two adjacent limit blocks 110. Preferably, the plurality of limit blocks 110 are arranged at equal intervals on the upper surface of the support plate 100, so that the widths of the limit slots 120 formed on the support plate 100 are all equal. The side surfaces of the limit blocks 110 located within the limit slots 120 are provided with a plurality of convex arc portions 111 spaced-apart along the length of the limit slots 120, and notches 112 located below the convex arc portions 111 and extending through the two opposite end surfaces of the limit blocks 110. That is, the two outermost limiting blocks 110 on the support plate 100 only have convex arc portions 111 and notches 112 on their sides adjacent to the limiting groove 120. The remaining limiting blocks 110 on the support plate 100 are each provided with convex arc portions 111 and notches 112 on both opposing sides. With the convex arc portions 111 and notches 112 provided on the limiting blocks 110, the limiting groove 120 has an inverted T-shaped cross-section. The limiting groove 120 includes a vertical guide portion and a horizontal limiting portion located at the bottom end of the vertical guide portion, perpendicular to and connected to the vertical guide portion. The portions of the horizontal limiting portion protruding from both sides of the vertical guide portion are formed by notches 112. The inner side surface of the vertical guide portion includes at least a convex arc surface formed by convex arc portions 111 arranged at intervals. The support plate 100 has a first side corresponding to the notch at one end of the limiting groove 120 and a second side corresponding to the notch at the other end of the limiting groove 120. In this embodiment, the limiting groove 120 extends along the width direction of the support plate 100, and the limiting blocks 110 are arranged at intervals along the length direction of the support plate 100; the first side is located on one long side of the support plate 100, and the second side is located on the other long side of the support plate 100.

[0034] The cover plate 200 is positioned above the support plate 100 and covers the various limit blocks 110. The two opposing sides of the cover plate 200 are fixedly connected to the outermost limit blocks 110 on the support plate 100. The support plate 100, the limit blocks 110, and the cover plate 200 together form an adjustment slot 500. In this embodiment, the cover plate 200 is actually a sheet metal protective cover. Instead of using a high-temperature adhesive protective film, the cover plate 200 protects the adjustment assembly 400 and the connection between the adjustment assembly 400 and the rack. This eliminates the need for applying a high-temperature adhesive protective film to the screw connection. This eliminates the inconvenience of removing the high-temperature adhesive protective film when adjusting the rack length, facilitating manual operation. Furthermore, the cover plate 200 is reusable and does not require frequent replacement, saving consumable costs and improving the effectiveness of continuous protection. The rack assembly 300 includes a plurality of racks 310 arranged side by side and corresponding to each limiting groove 120 one by one. The racks 310 are inserted into the adjustment groove 500 and fit with the upper surface of the limiting block 110, and at least one end of the rack 310 extends out of the adjustment groove 500 and forms a steam interception portion on the first side. In this embodiment, the sliding trajectory of the rack 310 is limited by the limiting groove 120, so that the rack 310 moves in a directional manner. The rack 310 is used to intercept the steam released by the auxiliary heating device of the coating machine to change the motion trajectory of the sputtered particles, so that the sputtered particles are more evenly distributed on the surface of the substrate; by adjusting the length of each rack 310 extending out of the first side, the exposed length of each rack 310 is different to form a specific shape, and the uniformity of the thickness of the deposited film is achieved by intercepting the steam. The steam interception portion of this embodiment is used to intercept the steam released by the auxiliary heating device.

[0035] The adjustment assembly 400 includes a plurality of sliding positioning nuts 410 located below the rack 310 and slidingly inserted into each limiting groove 120 in a one-to-one manner, and a plurality of knurled screws 420 located above the rack 310 and corresponding to each sliding positioning nut 410 in a one-to-one manner; the cross section of the sliding positioning nut 410 is an inverted T-shaped structure, the upper side surface of the sliding positioning nut 410 slides with the convex arc portion 111, the lower part of the sliding positioning nut 410 is limitedly matched with the inner wall of the notch 112 along the thickness direction of the rack 310, and the sliding positioning nut 410 is provided with a plurality of knurled screws 420 located above the rack 310 and corresponding to each sliding positioning nut 410 in a one-to-one manner; The width of the lower portion of the dynamic positioning nut 410 is smaller than the width of the lower portion of the limiting slot 120. Each knurled screw 420 is threaded through a corresponding rack 310 and is threadedly connected to the sliding positioning nut 410 below the rack 310. When the knurled screw 420 rotates in a first direction, it squeezes the rack 310 to force the rack 310 against the limiting block 110. When the knurled screw 420 rotates in a second direction and is subjected to tension, it pushes the rack 310 to slide along the limiting slot 120 to adjust the length of the rack 310 extending out of the adjustment slot 500. In other words, each rack 310 is limited by a sliding positioning nut 410 and the knurled screw 420 paired with the sliding positioning nut 410. In this embodiment, the first direction is defined as clockwise, and the second direction is defined as counterclockwise. In this way, when the knurled screw 420 is rotated clockwise, the distance between the top of the knurled screw 420 and the bottom of the sliding positioning nut 410 is reduced. In this way, through the joint extrusion of the knurled screw 420 and the sliding positioning nut 410, the rack 310 is pressed against the limit block 110 to achieve the limitation of the rack 310; when the knurled screw 420 is rotated counterclockwise, the distance between the top of the knurled screw 420 and the bottom of the sliding positioning nut 410 is increased, and the extrusion force of the knurled screw 420 and the sliding positioning nut 410 on the rack 310 is reduced. At this time, by pulling the knurled screw 420, the knurled screw 420 drives the rack 310 to move along the length direction of the limiting groove 120, thereby adjusting the length of the end of the rack 310 extending out of the adjusting slot 500.

[0036] In this embodiment, the knurled screw 420 is provided with anti-slip grooves. By providing the knurled screw 420, the rack 310 can be tightened by simply manually tightening the knurled screw 420, without the need for tools such as a wrench. This reduces operational difficulty and saves labor costs. Furthermore, by using the knurled screw 420 in conjunction with the sliding positioning nut 410 having an inverted T-shaped cross-section, the sliding positioning nut 410 slides directionally within the limiting groove 120 to adjust the extension length of the rack. This not only achieves the positioning of the rack 310, but also greatly increases the length adjustment range of the rack 310. There is no need to replace racks 310 of different lengths for length adjustment. A single model of rack 310 can meet all the adjustment length requirements of the correction plate, saving the cost of correction plate production and labor costs of re-material replacement. Furthermore, because the limiting groove 120 is designed at the bottom of the rack 310 and is protected by the cover plate 200, the target material during the coating process can only accumulate on the surface of the cover plate 200 and the rack 310, and cannot enter and block the limiting groove 120, which is beneficial to extending the service life of the coating correction plate structure. It should also be noted that because the width of the lower portion of the sliding positioning nut 410 is smaller than the width of the lower portion of the limiting groove 120, when the sliding positioning nut 410 slides within the limiting groove 120, the lower portion of the sliding positioning nut 410 does not contact the inner surface of the notch 112. Only the upper portion of the sliding positioning nut 410 makes point contact with the convex arc portion 111 of the limiting block 110. Compared to traditional surface contact positioning, the point contact limiting method of this solution has less friction, making the sliding positioning nut 410 and the rack 310 slide more smoothly, and reducing the difficulty of adjusting the length of the rack 310. Of course, in this solution, there are no grooves, holes or other characteristic contours on the rack 310 . After the target material is sprayed thereon, there are no destructible features on the rack 310 , and the sliding adjustment of the rack 310 is not affected, which is beneficial to extending the service life of the rack 310 .

[0037] The coating correction plate structure also includes two fixed blocks 600 fixed on the upper surface of the outermost limit block 110 on the support plate 100, and the two ends of the cover plate 200 are fixedly connected to the two fixed blocks 600. Figure 3 as well as Figure 8-12In one embodiment, a slot 610 is provided on the lower portion of the fixing block 600 adjacent to the adjustment slot 500, penetrating the lower surface of the fixing block 600. A mounting slot 620 is provided on the upper surface of the fixing block 600, communicating with the slot 610. A glass ball screw 630 is inserted into the mounting slot 620. Pins 210 are provided on opposite sides of the cover plate 200, each of which can be inserted into the slot 610. A groove or recessed hole 211 is provided on the upper surface of the pin 210, extending along the length of the limiting slot 120. The bottom of the glass ball screw 630 is engaged with the groove or recessed hole 211 when the pin 210 is inserted into the slot 610. In this embodiment, an opening is provided at the bottom of the glass bead screw 630, and a ball head 631 is provided in the inner cavity of the glass bead screw 630. The ball head 631 is elastically connected to the inner wall of the glass bead screw 630. For example, the ball head 631 is connected to the inner wall of the glass bead screw 630 by a spring. The diameter of the ball head 631 is larger than the diameter of the opening. When the pin 210 is inserted into the slot 610 but the end of the pin 210 does not contact the ball head 631, the ball head 631 moves downward under the action of the spring and presses against the edge of the opening; as the insertion depth of the pin 210 increases, the end of the pin 210 contacts the ball head 631. The spring compresses and lifts the ball head 631, causing the ball head 631 to move toward the inner cavity of the glass screw 630, allowing the pin 210 to be further inserted into the slot 610. When the groove or recessed hole 211 on the pin 210 moves below the ball head 631, the pressure exerted by the upper surface of the pin 210 on the ball head 631 is released. Driven by the spring, the ball head 631 returns to its original position and embeds itself into the groove or recessed hole 211. In this way, the ball head 631 cooperates with the groove notch or recessed hole opening to position the pin 210 and, consequently, the cover plate 200, preventing it from being pulled out. In this embodiment, the glass screw 630 cooperates with the groove or recessed hole 211 to position the cover plate 200, enabling quick installation of the cover plate 200. Preferably, in this embodiment, the side of the cover plate 200 is provided with an extension arm extending toward the support plate 100, and the end of the extension arm is bent away from the adjustment slot 500 to form a pin 210. In another embodiment, both ends of the cover plate 200 abut against the upper surface of the fixing block 600, and the two ends of the cover plate 200 are screwed to the fixing block 600. In other words, the cover plate 200 is mounted on the two fixing blocks 600. In this way, the cover plate 200, together with the support plate 100 and the limit block 110, forms the adjustment slot 500 while protecting the limit block 110 and the knurled screw 420.

[0038] In this embodiment, the cover plate 200 is used to protect the knurled screw 420 and the inner sidewall of the limiting groove 120, thereby slowing the target deposition rate and extending the service life of the coating correction plate structure. The cover plate 200 is provided with a first baffle 220 located on the first side and extending toward the support plate 100, and a second baffle 230 located on the second side and extending toward the support plate 100. The bottom ends of the first baffle 220 and the second baffle 230 are flush with the upper surface of the rack 310, or slightly higher than the upper surface of the rack 310, to ensure smooth movement of the rack 310. The first baffle 220 and the second baffle 230 jointly block both ends of the adjustment slot 500 to reduce the amount of target material entering the adjustment slot 500.

[0039] In one embodiment, a straight connecting portion is provided between adjacent convex arc portions 111. In another embodiment, a concave arc portion 113 is provided between adjacent convex arc portions 111. In other words, the side surface of the stop block 110 adjacent to the stop groove 120 has a wavy structure. In this way, the concave arc portion 113 between adjacent convex arc portions 111 is more conducive to target material deposition and extends the service life of the coating correction plate structure.

[0040] In this embodiment, the sliding positioning nut 410 includes a vertical portion 411 threadedly connected to the knurled screw 420, and two horizontal portions 412 disposed on the lower portions of opposite sides of the vertical portion 411. The horizontal portions 412 slide into the notch 112, and the lower edges of the horizontal portions 412 are provided with a relief bevel 413, forming a relief space between the relief bevel 413 and the inner wall of the notch 112. The provision of the relief bevel 413 on the lower portion of the sliding positioning nut 410 prevents the sliding positioning nut 410 from interfering with the inner wall of the notch 112 during insertion into the retaining groove 120, thereby reducing the difficulty of installing the sliding positioning nut 410. In addition, in this embodiment, the retaining block 110 is screwed to the support plate 100.

[0041] When assembling the coating correction plate structure, first, each limit block 110 is installed on the support plate 100 in sequence by screws, and at the same time, the two fixing blocks 600 are locked one by one on the two outermost limit blocks 110 on the support plate 100 by screws; the bead screw is fixed to the fixing block 600 by threaded connection, and the tightening depth of the bead screw 630 is adjusted; a sliding positioning nut 410 and a knurled screw 420 are installed on each rack 310 respectively, and the sliding positioning nut 410 and the knurled screw 420 are pre-tightened, and then the sliding positioning nut 410 is slid into the limit groove 120, and the knurled screw 420 is rotated to lock and fix the rack 310; finally, the cover plate 200 is covered, and the ball head 631 of the bead screw is pressed into the groove or recessed hole 211 of the pin 210 to fix the cover plate 200.

[0042] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0043] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A coating correction plate structure capable of quickly adjusting the rack, characterized in that: include: A support plate, wherein a plurality of spaced limit blocks are fixed on the upper surface of the support plate, a limit groove is formed between two adjacent limit blocks, a side surface of the limit block located in the limit groove is provided with a plurality of convex arc portions spaced along the length direction of the limit groove, and a notch located below the convex arc portion and passing through two opposite end surfaces of the limit block, the support plate having a first side corresponding to the notch at one end of the limit groove and a second side corresponding to the notch at the other end of the limit groove; A cover plate, the cover plate is located above the support plate and covers the limit blocks, two opposite sides of the cover plate are fixedly connected to the outermost limit blocks on the support plate, and the support plate, the limit blocks and the cover plate together form an adjustment slot; a rack assembly comprising a plurality of racks arranged side by side and corresponding one to each of the limit slots, the racks being inserted into the adjustment slots and abutting against the upper surface of the limit block, with at least one end of the racks extending out of the adjustment slot and forming a steam interception portion on a first side; and The adjusting component includes a plurality of sliding positioning nuts located below the rack and slidingly inserted into each limiting groove one by one, and a plurality of knurled screws located above the rack and corresponding to each sliding positioning nut one by one; the cross-section of the sliding positioning nut is an inverted T-shaped structure, the upper side surface of the sliding positioning nut slides with the convex arc portion, the lower part of the sliding positioning nut is limitedly fitted with the inner wall of the notch along the thickness direction of the rack, and the width of the lower part of the sliding positioning nut is smaller than the width of the lower part of the limiting groove, each knurled screw is correspondingly passed through a rack and is threadedly connected to the sliding positioning nut below the rack; the knurled screw squeezes the rack when rotating in a first direction so that the rack is pressed against the limiting block; when the knurled screw rotates in a second direction and is subjected to tension, it pushes the rack to slide along the limiting groove to adjust the length of the rack extending out of the adjusting slot.

2. The coating correction plate structure according to claim 1, characterized in that: The coating correction plate structure also includes two fixing blocks fixed one-to-one on the upper surface of the outermost limiting block on the support plate, and the two ends of the cover plate are fixedly connected to the two fixing blocks respectively.

3. The coating correction plate structure according to claim 2, characterized in that: A slot penetrating the lower surface of the fixing block is provided at the lower portion of one side of the fixing block adjacent to the adjustment slot, and a mounting slot communicating with the slot is provided on the upper surface of the fixing block, wherein a glass bead screw is inserted into the mounting slot; pins that can be inserted into the slot are respectively provided on the two opposite sides of the cover plate, and a groove or concave hole extending along the length direction of the limiting slot is provided on the upper surface of the pin, and the bottom of the glass bead screw is limitedly engaged with the groove or concave hole when the pin is inserted into the slot.

4. The coating correction plate structure according to claim 3, characterized in that: An extension arm extending toward the support plate is provided on the side of the cover plate, and the end of the extension arm is bent toward the direction away from the adjustment slot to form the pin.

5. The coating correction plate structure according to claim 2, characterized in that: The two ends of the cover plate abut against the upper surface of the fixing block, and the two ends of the cover plate are screw-connected to the fixing block.

6. The coating correction plate structure according to claim 1, characterized in that: The cover plate is provided with a first baffle plate located at the first side and extending toward the support plate, and a second baffle plate located at the second side and extending toward the support plate.

7. The coating correction plate structure according to claim 1, characterized in that: A straight connecting portion is provided between adjacent convex arc portions.

8. The coating correction plate structure according to claim 1, characterized in that: A concave arc portion is provided between adjacent convex arc portions.

9. The coating correction plate structure according to claim 1, characterized in that: The sliding positioning nut includes a vertical portion threadedly connected to the knurled screw and two horizontal portions relatively arranged at the lower parts of the two opposite sides of the vertical portion. The horizontal portion is slidably embedded in the notch, and the lower surface edge of the horizontal portion is provided with a avoidance inclined surface, and a avoidance space is formed between the avoidance inclined surface and the inner wall of the notch.

10. The coating correction plate structure according to claim 1, characterized in that: The limiting block is connected to the supporting plate with screws.

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