A slot coating device and flatness control device

Abstract

The application discloses a slit glue coating device and flatness control device, relates to the slit glue coating technical field.The application includes a mounting seat, the bottom of the mounting seat is slidably connected with a first die head and a second die head, and a coating slit is formed between the first die head and the second die head; an accommodating cavity is formed in the first die head, a discharge port is formed on one side of the accommodating cavity close to the coating slit, and a feeding port is formed on the side away from the coating slit.The even flow plate, the flow divider and the flow guide hole can buffer the glue solution, uniformly divide the glue solution to the flow guide hole, make the glue solution uniformly enter each position of the coating slit, make the pressure and the flow rate of the glue solution sprayed from each position consistent, and the worm gear, the worm, the gear and the rack can drive the first die head and the second die head to move in opposite directions at the same time, so that the width of the coating slit can be adjusted according to actual conditions.

Description

Technical Field

[0001] This invention relates to the field of slit coating technology, specifically to a slit coating device and a flatness control device. Background Technology

[0002] Coating is a widely used process in modern manufacturing. Slit coaters are one type of coating equipment. During operation, optical liquid adhesive flows through the slit between two dies onto the surface of the product to be coated. The key to the dies lies in the structural design of the internal cavity and die lip, which determines the uniformity of the slurry coating in the lateral direction, thus determining the consistency of product batches. This is crucial to the overall performance and pass rate of the product. Therefore, the width of the slit directly affects the amount and thickness of the optical liquid adhesive coated, and has a significant impact on the coating quality.

[0003] In the prior art, in order to increase the coating amount and improve the coating efficiency, nozzles with a longer length are usually designed. However, the coating pressure and flow rate of the coating liquid are different at different positions along the length of the nozzle, which will make the sprayed coating liquid uneven. When the nozzle length increases, this unevenness defect becomes more serious, resulting in uneven coating and affecting the coating quality.

[0004] To address this, we propose a slit adhesive application device and a flatness control device. Summary of the Invention

[0005] The purpose of this invention is to provide a slit adhesive application device and a flatness control device, which enables the adhesive liquid to be evenly distributed within the slit.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a slit coating device and a flatness control device, comprising a mounting base, wherein a first die head and a second die head are slidably connected to the bottom of the mounting base, and a coating slit is formed between the first die head and the second die head;

[0007] The first die head has an internal cavity, with an outlet on the side of the cavity near the coating slit and an inlet on the side away from the coating slit.

[0008] A flow equalization plate is fixedly connected to the bottom of the inner wall of the receiving cavity, and multiple flow distribution columns are fixedly connected to the side wall of the flow equalization plate, with a flow guide hole opened between every two adjacent flow distribution columns.

[0009] A sealing strip is fixedly connected to the side wall of the first mold head, a sealing gasket is fixedly connected to the side wall of the sealing strip, a storage box is slidably connected to the outer surface of the sealing strip, and an elastic rod is fixedly connected to the side wall of the sealing strip, the elastic rod being fixed inside the storage box.

[0010] Furthermore, both the top of the first mold head and the second mold head are fixedly connected to sliders, and the bottom of the mounting base is provided with a groove that matches the sliders.

[0011] Furthermore, the top of the flow equalization plate is arc-shaped.

[0012] Furthermore, the cross-sectional shape of the diversion column is semi-circular.

[0013] Furthermore, there are two sealing strips, and the two sealing strips are fixedly connected to the first mold head and the second mold head respectively.

[0014] Furthermore, there are two elastic rods, and both elastic rods are bidirectional elastic rods, with their two ends fixedly connected to the two sealing strips respectively.

[0015] According to one aspect of the present invention, the present invention provides a flatness control device for adjusting the flatness uniformity of the coating of the slit adhesive applicator, comprising a first rotating shaft rotatably connected inside the mounting base, a worm gear fixedly connected to the first rotating shaft, a gear fixedly connected to the bottom of the first rotating shaft, and a rack rotatably connected to the outer surface of the gear.

[0016] The first mold head and the second mold head are provided with storage grooves at their tops, and the rack is fixed in the storage grooves;

[0017] The outer side of the worm gear is rotatably connected to a worm, and the worm is arranged through the mounting base.

[0018] Furthermore, the mounting base has a storage cavity inside for storing the worm gear, worm, and first rotating shaft, with the first rotating shaft extending through the bottom of the storage cavity.

[0019] Furthermore, the worm gear and the worm mesh with each other, and a throttle is fixedly connected to one end of the worm that passes through the mounting base.

[0020] Furthermore, there are two racks, and the racks mesh with the gears.

[0021] This invention has at least the following beneficial effects:

[0022] 1. The present invention, through the cooperation of the flow equalization plate, the flow divider, and the flow guide hole structure, can buffer the adhesive and evenly distribute the adhesive to the flow guide hole, thereby making the adhesive evenly enter each position of the coating slit, so that the pressure and flow rate of the adhesive sprayed from each position are consistent, thus greatly improving the uniformity of coating.

[0023] 2. The present invention, through the cooperation of the worm gear, worm, gear and rack structure, can drive the first die head and the second die head to move simultaneously in opposite directions, which makes it easy to adjust the width of the coating slit according to the actual situation, thereby further adjusting the smoothness and uniformity of the coating adhesive.

[0024] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0025] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a cross-sectional schematic diagram of the first mold head structure of the present invention;

[0027] Figure 3 This is a three-dimensional schematic diagram of the flatness control device of the present invention;

[0028] Figure 4 This is a three-dimensional schematic diagram of the first mold head structure of the present invention;

[0029] Figure 5 This is a cross-sectional schematic diagram of the sealing strip structure of the present invention;

[0030] Figure 6 This is a three-dimensional schematic diagram of the flow equalization plate structure of the present invention.

[0031] Figure label:

[0032] 1. Mounting base; 2. First die head; 3. Second die head; 4. Coating slit; 5. Receiving cavity; 6. Outlet; 7. Inlet; 8. Flow equalization plate; 9. Flow divider column; 10. Guide hole; 11. Sealing strip; 12. Sealing gasket; 13. Storage box; 14. Elastic rod; 15. First rotating shaft; 16. Worm gear; 17. Gear; 18. Rack; 19. Storage groove; 20. Worm; 21. Slider; 22. Rotary handle. Detailed Implementation

[0033] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0034] Please see Figures 1-6 The present invention provides a technical solution: a slit coating device and a flatness control device, including a mounting base 1, a first mold head 2 and a second mold head 3 slidably connected to the bottom of the mounting base 1, and a coating slit 4 formed between the first mold head 2 and the second mold head 3;

[0035] The first mold head 2 has a receiving cavity 5 inside. The receiving cavity 5 has an outlet 6 on the side near the coating slit 4 and an inlet 7 on the side away from the coating slit 4.

[0036] A flow equalization plate 8 is fixedly connected to the bottom of the inner wall of the cavity 5. Multiple flow equalization columns 9 are fixedly connected to the side wall of the flow equalization plate 8, and a flow guide hole 10 is opened between every two adjacent flow dividers 9.

[0037] A sealing strip 11 is fixedly connected to the side wall of the first mold head 2. A sealing gasket 12 is fixedly connected to the side wall of the sealing strip 11. A storage box 13 is slidably connected to the outer surface of the sealing strip 11. An elastic rod 14 is fixedly connected to the side wall of the sealing strip 11 and is fixed inside the storage box 13.

[0038] It should be noted that the top of both the first mold head 2 and the second mold head 3 is fixedly connected to a slider 21, and the bottom of the mounting base 1 is provided with a groove that matches the slider 21. By using the groove and the slider 21, the first mold head 2 and the second mold head 3 can be moved on the mounting base 1 to make fine adjustments to the coating slit 4.

[0039] Furthermore, the top of the flow equalization plate 8 is arc-shaped, which facilitates buffering when the coating liquid flows over the top of the flow equalization plate 8. The cross-sectional shape of the flow divider 9 is semi-circular, which facilitates the uniform distribution of the coating liquid to the guide hole 10, so that it flows evenly into the coating slit 4 from the guide hole 10.

[0040] There are two sealing strips 11, and the two sealing strips 11 are fixedly connected to the first mold head 2 and the second mold head 3 respectively. The two sealing strips 11 facilitate the sealing treatment above the coating slit 4, preventing the coating liquid from entering the mounting base 1 from above. The sealing strips 11 can move left and right in the storage box 13, which facilitates adaptive adjustment according to the size of the coating slit 4 and improves the practicality of the device.

[0041] Furthermore, there are two elastic rods 14, and both elastic rods 14 are bidirectional elastic rods 14. The two ends of the elastic rods 14 are fixedly connected to the two sealing strips 11 respectively. The elastic rods 14 are used to provide elastic potential energy to the sealing strips 11 so that they can be reset.

[0042] Specifically, the first die head 2 and the second die head 3 are first installed in appropriate positions on the mounting base 1. When coating is required, the coating adhesive is first transported into the receiving cavity 5 through the feed port 7. At this time, the flow equalization plate 8 will block and buffer the adhesive, and through the interaction of multiple flow splitting columns 9, the adhesive will be evenly distributed to the guide hole 10, so that the adhesive enters the coating slit 4 evenly, making the pressure and flow rate of the adhesive sprayed from each position consistent, thereby greatly improving the uniformity of coating.

[0043] like Figure 2 As shown, a flatness control device includes a first rotating shaft 15 rotatably connected inside the mounting base 1, a worm gear 16 fixedly connected to the first rotating shaft 15, a gear 17 fixedly connected to the bottom of the first rotating shaft 15, and a rack 18 rotatably connected to the outer surface of the gear 17. There are two racks 18, and the racks 18 and the gear 17 mesh with each other.

[0044] The top of the first mold head 2 and the second mold head 3 are provided with a storage groove 19, and the rack 18 is fixed in the storage groove 19;

[0045] The outer side of the worm gear 16 is rotatably connected to the worm 20, and the worm 20 is arranged through the mounting base 1.

[0046] It should be noted that the mounting base 1 has a storage cavity (not shown in the figure) inside, which is used to store the worm gear 16, the worm 20 and the first rotating shaft 15. The first rotating shaft 15 is set through the bottom of the storage cavity. When the worm gear 16 rotates, it will drive the first rotating shaft 15 to rotate.

[0047] Furthermore, the worm gear 16 and the worm 20 mesh with each other, and a handle 22 is fixedly connected to one end of the worm 20 that passes through the mounting base 1. Rotating the handle 22 causes the worm 20 to rotate, which in turn causes the worm gear 16 to rotate, thereby causing the first rotating shaft 15 to rotate. When the first rotating shaft 15 rotates, it causes the gear 17 to rotate as well, thereby causing the two racks 18 to move in opposite directions.

[0048] Specifically, when it is necessary to adjust the coating slit 4, firstly, the worm gear 20 is rotated by turning the handle 22, and the worm gear 20 drives the worm wheel 16 to rotate. When the worm wheel 16 rotates, it drives the first rotating shaft 15 to rotate, which in turn drives the gear 17 to rotate. When the gear 17 rotates in the forward direction, it drives the racks 18 set on both sides of it to move in the opposite direction, thereby driving the first die head 2 and the second die head 3 to move towards the middle at the same time, thus narrowing the width of the coating slit 4. Conversely, when the gear 17 rotates in the reverse direction, the width of the coating slit 4 can be widened. In this way, it is convenient to adjust the flatness and uniformity of the coating adhesive according to actual needs.

[0049] The usage process and principle of this invention are as follows: First, the first die head 2 and the second die head 3 are installed in appropriate positions on the mounting base 1. When coating is required, the worm gear 20 is rotated by turning the handle 22, and the worm gear 20 drives the worm wheel 16 to rotate. When the worm wheel 16 rotates, it drives the first rotating shaft 15 to rotate, thereby driving the gear 17 to rotate as well. When the gear 17 rotates, it drives the racks 18 set on both sides to move in opposite directions, thereby driving the first die head 2 and the second die head 3 to move as well. The coating slit 4 can be adjusted to an appropriate width according to the actual situation. Then, the coating adhesive is delivered into the receiving cavity 5 through the feed port 7. At this time, the flow equalization plate 8 will block and buffer the adhesive, and through the interaction of multiple flow splitting columns 9, the adhesive will be evenly distributed to the guide hole 10, so that the adhesive enters the coating slit 4 evenly, making the pressure and flow rate of the adhesive sprayed from each position consistent, thus enabling slit coating.

[0050] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0051] For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances. When an element is referred to as being "assembled on," "mounted on," "fixed to," or "set on" another element, it may be directly on the other element or there may be an intermediate element present. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible embodiments.

[0052] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

[0053] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A slit adhesive applicator, comprising a mounting base (1), characterized in that, The bottom of the mounting base (1) is slidably connected to a first mold head (2) and a second mold head (3), and a coating slit (4) is formed between the first mold head (2) and the second mold head (3); The first die head (2) has a receiving cavity (5) inside. The receiving cavity (5) has an outlet (6) on the side close to the coating slit (4) and an inlet (7) on the side away from the coating slit (4). The bottom of the inner wall of the cavity (5) is fixedly connected to a flow equalization plate (8), and multiple flow equalization columns (9) are fixedly connected to the side wall of the flow equalization plate (8), and a flow guide hole (10) is opened between every two adjacent flow dividers (9). A sealing strip (11) is fixedly connected to the side wall of the first mold head (2), a sealing gasket (12) is fixedly connected to the side wall of the sealing strip (11), a storage box (13) is slidably connected to the outer surface of the sealing strip (11), an elastic rod (14) is fixedly connected to the side wall of the sealing strip (11), and the elastic rod (14) is fixed inside the storage box (13). The number of sealing strips (11) is two, and the two sealing strips (11) are fixedly connected to the first mold head (2) and the second mold head (3) respectively; The number of elastic rods (14) is two, and both elastic rods (14) are bidirectional elastic rods (14). The two ends of the elastic rods (14) are fixedly connected to the two sealing strips (11) respectively. The top of the flow equalization plate (8) is arc-shaped; The cross-sectional shape of the diversion column (9) is semi-circular; The mounting base (1) is rotatably connected to a first rotating shaft (15), a worm gear (16) is fixedly connected to the first rotating shaft (15), a gear (17) is fixedly connected to the bottom of the first rotating shaft (15), and a rack (18) is rotatably connected to the outer surface of the gear (17). The first mold head (2) and the second mold head (3) are provided with storage slots (19) on their tops. There are two racks (18), and the racks (18) mesh with the gears (17). The two racks (18) are respectively fixed in the storage slots (19) on the tops of the first mold head (2) and the second mold head (3). The outer side of the worm wheel (16) is rotatably connected to a worm (20), and the worm (20) is arranged through the mounting base (1); The worm wheel (16) meshes with the worm (20), and a throttle (22) is fixedly connected to one end of the worm (20) that passes through the mounting base (1).

2. The slit adhesive applicator according to claim 1, characterized in that: The top of the first mold head (2) and the second mold head (3) are both fixedly connected to sliders (21), and the bottom of the mounting base (1) is provided with a groove that matches the sliders (21).

3. The slit adhesive applicator according to claim 2, characterized in that: The mounting base (1) has a storage cavity inside for storing the worm gear (16), worm (20) and first rotating shaft (15), and the first rotating shaft (15) is set through the bottom of the storage cavity.

Images