Coating device capable of reducing interference of coating on rainbow lines

Abstract

The utility model discloses a coating device capable of reducing coating interference rainbow patterns, which comprises a frame body, one end of the frame body is connected with a winding roller frame used for winding a release film, the top of the other end of the frame body is provided with an unwinding roller, a plurality of guide roller shafts used for guiding and conveying the release film are arranged in the frame body, and the guide roller shafts are connected with the winding roller frame. A tension adjusting structure used for adjusting the release film conveying tension is installed above the middle area in the frame body. According to the coating device capable of reducing the interference of the coating on the rainbow lines, the device can adjust and control the temperature change when the coated release film is dried, and the situation that the temperature is too high, so that a solvent volatilizes too fast, the temperature of the film surface rises, water vapor is condensed on the film surface, and the quality of the coating is affected is avoided. And if the temperature is too low, the volatilization speed of the solvent can be slowed down, so that the rainbow pattern problem is more obvious.

Description

Technical Field

[0001] The utility model relates to the technical field of release film equipment, in particular to a coating device for reducing interference rainbow patterns of coatings. Background Art

[0002] Release film is a special film with low adhesion, used to prevent two sticky surfaces from sticking together. It is usually made of plastic film (such as PE, PET, PP, etc.) or siliconized paper, and coated with materials such as fluorine or silicone oil. This film is used as a separator during spraying, lamination or coating, and can easily remove adhered substances. Release film is widely used in electronics, automotive foam, printing and other fields, and plays an important role in modern production efficiency and product quality.

[0003] During the production and processing of release film, it needs to be coated. Coating of release film refers to applying a layer of specific coating on the surface of the release film to enhance its specific surface properties, such as enhancing the printing performance of the film, enhancing the peeling force of the aluminum layer after aluminizing, or improving the smoothness of the film surface.

[0004] However, rainbow patterns may appear after the release film is coated. The rainbow pattern is caused by the release agent being coated on the base film. When the silicon-coated surface is observed with the naked eye after curing, the release agent coating and the base film undergo optical refraction, diffraction and other phenomena, resulting in different colored patterns. The rainbow pattern is only an optical phenomenon visible to the naked eye, and is not an abnormality such as oil or dirt on the coating surface.

[0005] If the coating solvent contains impurities, these impurities may affect the uniformity of the mixing of silicone oil and solvent, resulting in rainbow lines on the coating. In addition, temperature has a direct impact on the generation of rainbow lines. An unreasonable temperature curve, such as improper temperature setting during solvent evaporation and silicone curing, may lead to the generation of rainbow lines.

[0006] The formation of rainbow patterns is also affected by the coating thickness. Uneven coating thickness can easily cause light refraction, forming striped "patterns" with colors like a rainbow. Therefore, controlling the uniformity of coating thickness is an important factor in reducing the formation of rainbow patterns.

[0007] In view of the above problems, it is urgent to carry out innovative design based on the original coating device. Utility Model Content

[0008] The technical solution of the utility model aims at the technical problem that the existing technical solutions are too single, and provides a coating device for reducing coating interference rainbow patterns, which is significantly different from the existing solutions, so as to solve the problems raised in the above background technology.

[0009] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a coating device for reducing interference rainbow patterns in coatings, comprising a frame, one end of the frame is connected to a winding roller frame for winding up a release film, and a unwinding roller is installed on the top of the other end of the frame, a plurality of guide rollers for guiding and conveying the release film are provided in the frame, a tension adjustment structure for adjusting the conveying tension of the release film is installed above the middle area of ​​the frame, and an auxiliary roller for assisting in coating the release film is connected to the frame below the tension adjustment structure, a box is provided below the auxiliary roller, a coating structure for coating the release film is installed in the box, and a drying structure for drying the coated release film is installed on one side of the frame between the tension adjustment structure and the auxiliary roller.

[0010] Preferably, the tension adjustment structure includes a fixed block, a first threaded rod, an adjusting roller frame, and a limiting rod. At least two groups of fixed blocks are connected in the frame body, and each group of fixed blocks is threadedly connected to a first threaded rod, and the upper end of each first threaded rod is rotatably connected to an adjusting roller frame, and each adjusting roller frame is connected below at least one limiting rod, and the lower end of each limiting rod passes through a corresponding fixed block for limiting the adjusting roller frame.

[0011] Preferably, the coating structure includes a coating roller, a chain, a connecting shaft, a fan blade tube, a scraper, a second threaded rod, a thickness limiting plate, and a thickness limiting roller frame. The coating roller is rotatably connected to the box body, and one end of the coating roller passes through the outer wall of the box body and is connected to the chain via a sprocket. The chain is connected to a connecting shaft via the sprocket, and the end of the connecting shaft passes through and is rotatably connected to the inner wall of the box body. The connecting shaft is located in the inner and outer wall areas of the box body and is connected to a fan blade tube for stirring to prevent material sedimentation. A scraper is connected to the box body, and the end of the scraper fits one side of the outer wall of the coating roller. The outer wall of the box body is rotatably connected to a second threaded rod, and the outer wall of the second threaded rod is threadedly connected to the limiting thickness plate, and a limiting recess is provided between the thickness limiting plate and the top of the box body, and the top of the thickness limiting plate is connected to the limiting thickness roller frame.

[0012] Preferably, the diameter of the coating roller is larger than the diameter of the connecting shaft to form a rotation speed difference, the upper ends of the scraper and the thickness limiting plate are both inclined, and a mesh plate for filtering impurities is installed from the middle to the bottom of the scraper.

[0013] Preferably, the drying structure includes a nozzle plate, a cylinder, a control screw, a movable plug, an adjusting spring, an opening plug, a memory alloy spring, a heating inlet, and a cooling inlet. A plurality of nozzle plates are installed on the frame, and each nozzle plate is connected to a cylinder, one end of each cylinder is threadedly connected to a control screw, and one end of each control screw located in the cylinder is rotatably connected to a movable plug, the other end of the movable plug is connected to an adjusting spring, and the other end of the adjusting spring is connected to an opening plug, and the other end of the opening plug is connected to a memory alloy spring, the other end of the memory alloy spring is connected to the inner wall of the cylinder, and the outer wall of the cylinder is respectively connected to the heating inlet and the cooling inlet.

[0014] Preferably, the outer walls of the movable plug and the opening plug are both in contact with the inner wall of the cylinder, the opening plug is configured as a hollow cylinder, and the outer wall of the opening plug is provided with an opening communicating with the interior.

[0015] Compared with the prior art, the beneficial effect of the utility model is that the coating device for reducing coating interference rainbow patterns adjusts and controls the tension of the release film during the unwinding and coating process through the mutual cooperation of the unwinding roller, the guide roller and the tension adjustment structure, thereby avoiding excessive or insufficient tension to damage the release film, and at the same time reducing the influence of the tension problem on the coating amount, which will directly affect the "release force" of the silicone release coating.

[0016] By adjusting the box and coating structure, the coating thickness of the release film can be accurately controlled. During the coating process, the coating equipment will evenly roll up the solvent to ensure that the amount of solvent carried each time is a uniform thickness. The purpose of this is to avoid too much or too little solvent being carried in a certain area during the coating process, thereby affecting the coating thickness of the release film.

[0017] At the same time, in order to prevent the occurrence of rainbow lines during the coating process, the device also needs to avoid over- or under-coating. Rainbow lines are caused by uneven coating thickness or uneven solvent evaporation. Therefore, by accurately controlling the coating thickness and evenly distributing the solvent, the appearance of rainbow lines can be effectively avoided, ensuring the quality and beauty of the coating.

[0018] By setting the drying structure, the device can adjust and control the temperature change of the release film after coating when drying, so as to avoid the solvent volatilizing too quickly due to too high temperature, which will increase the temperature of the film surface and cause water vapor to condense on the film surface, thus affecting the quality of the coating. If the temperature is too low, the solvent volatilization speed will slow down, making the rainbow pattern problem more obvious. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0020] Figure 2This is a schematic diagram of the front cross-sectional structure of the box body of the utility model;

[0021] Figure 3 This is a schematic diagram of the front view structure of the box body of the utility model;

[0022] Figure 4 This is a schematic diagram of the front view structure of the utility model;

[0023] Figure 5 It is a schematic diagram of the cross-sectional structure of the cylinder of the utility model.

[0024] In the figure: 1. frame; 2. winding roller frame; 3. unwinding roller; 4. guide roller; 5. tension adjustment structure; 501. fixed block; 502. first threaded rod; 503. adjusting roller frame; 504. limiting rod; 6. auxiliary roller; 7. box body; 8. coating structure; 801. coating roller; 802. chain; 803. connecting shaft; 804. fan cylinder; 805. scraper; 806. second threaded rod; 807. thickness limiting plate; 808. thickness limiting roller frame; 9. drying structure; 901. nozzle plate; 902. cylinder; 903. control screw; 904. movable plug; 905. adjusting spring; 906. opening plug; 907. memory alloy spring; 908. heating inlet; 909. cooling inlet. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-5The utility model provides a technical solution: a coating device for reducing interference rainbow patterns of coating, comprising a frame 1, a winding roller frame 2, a unwinding roller 3, a guide roller shaft 4, a tension adjustment structure 5, a fixed block 501, a first threaded rod 502, an adjustment roller shaft frame 503, a limit rod 504, an auxiliary roller shaft 6, a box body 7, a coating structure 8, a coating roller shaft 801, a chain 802, a connecting shaft 803, a fan cylinder 804, a scraper 805, a second threaded rod 806, a thickness limiting plate 807, a thickness limiting roller frame 808, a drying structure 9, a nozzle plate 901, a cylinder 902, a control screw 903, a movable plug 904, an adjustment spring 905, an opening plug 906, a memory alloy spring 907, A heating inlet 908 and a cooling inlet 909, a winding roller frame 2 for winding up the release film is connected to one end of the frame 1, and a rewinding roller 3 is installed on the top of the other end of the frame 1, and a plurality of guide rollers 4 for guiding and conveying the release film are arranged in the frame 1, and a tension adjustment structure 5 for adjusting the conveying tension of the release film is installed above the middle area of ​​the frame 1, and an auxiliary roller 6 for assisting in coating the release film is connected below the tension adjustment structure 5 in the frame 1, and a box body 7 is provided below the auxiliary roller 6, and a coating structure 8 for coating the release film is installed in the box body 7, and a drying structure 9 for drying the coated release film is installed on one side of the area between the tension adjustment structure 5 and the auxiliary roller 6 in the frame 1.

[0027] The tension adjustment structure 5 includes a fixed block 501, a first threaded rod 502, an adjusting roller frame 503, and a limiting rod 504. At least two groups of fixed blocks 501 are connected in the frame body 1, and each group of fixed blocks 501 is threadedly connected with a first threaded rod 502, and the upper end of each first threaded rod 502 is rotatably connected to an adjusting roller frame 503, and each adjusting roller frame 503 is connected to at least one limiting rod 504 below, and the lower end of each limiting rod 504 passes through the corresponding fixed block 501 for limiting the adjusting roller frame 503.

[0028] The coating structure 8 includes a coating roller 801, a chain 802, a connecting shaft 803, a fan cylinder 804, a scraper 805, a second threaded rod 806, a thickness limiting plate 807, and a thickness limiting roller frame 808. The coating roller 801 is rotatably connected in the box body 7, and one end of the coating roller 801 passes through the outer wall of the box body 7 and is connected to the chain 802 through a sprocket. The chain 802 is connected to the connecting shaft 803 through a sprocket, and the end of the connecting shaft 803 passes through the inner wall of the box body 7 and is rotatably connected. The connecting shaft 803 is located in the inner and outer wall areas of the box body 7 and is connected to a fan blade cylinder 804 for stirring to prevent material sedimentation. A scraper 805 is connected inside the box body 7, and the end of the scraper 805 is attached to one side of the outer wall of the coating roller 801. The outer wall of the box body 7 is rotatably connected to a second threaded rod 806, and the outer wall of the second threaded rod 806 is threadedly connected to a limited thickness plate 807, and a limiting recess is provided between the limited thickness plate 807 and the top of the box body 7, and the top of the limited thickness plate 807 is connected to a limited thickness roller frame 808.

[0029] The diameter of the coating roller 801 is larger than the diameter of the connecting shaft 803 to form a rotation speed difference. The upper ends of the scraper 805 and the thickness limiting plate 807 are both set to be inclined, and a mesh plate for filtering impurities is installed from the middle to the bottom of the scraper 805.

[0030] The drying structure 9 includes a nozzle plate 901, a cylinder 902, a control screw 903, a movable plug 904, an adjusting spring 905, an opening plug 906, a memory alloy spring 907, a heating inlet 908, and a cooling inlet 909. A plurality of nozzle plates 901 are installed in the frame 1, and each nozzle plate 901 is connected to a cylinder 902, one end of each cylinder 902 is threadedly connected to a control screw 903, and one end of each control screw 903 located in the cylinder 902 is rotatably connected to a movable plug 904, the other end of the movable plug 904 is connected to an adjusting spring 905, and the other end of the adjusting spring 905 is connected to an opening plug 906, and the other end of the opening plug 906 is connected to a memory alloy spring 907, the other end of the memory alloy spring 907 is connected to the inner wall of the cylinder 902, and the outer wall of the cylinder 902 is respectively connected to the heating inlet 908 and the cooling inlet 909.

[0031] The outer walls of the movable plug 904 and the opening plug 906 are both in contact with the inner wall of the cylinder 902. The opening plug 906 is configured to be a hollow cylinder, and an opening communicating with the interior is provided on the outer wall of the opening plug 906.

[0032] Working principle: According to Figure 1 As shown, firstly, the release film to be coated is unwound by the unwinding roller 3, and the winding roller frame 2 is wound up, and the tension adjustment structure 5 is controlled to rotate the first threaded rod 502 to move and push the adjusting roller shaft frame 503 on the fixed block 501, and at the same time, the limiting rod 504 limits it, so as to change the tension of the release film during coating;

[0033] The release film is guided by the auxiliary roller 6 to cooperate with the coating roller 801 to coat the release film. By rotating the second threaded rod 806 in advance, the distance between the thickness limiting plate 807 and the coating roller 801, and the distance between the thickness limiting roller frame 808 and the release film are changed, so as to control the thickness of the coating amount to avoid excessive or insufficient coating. The scraper 805 can scrape off the impurities on the coating roller 801, and filter and separate them with the cooperation of the mesh in the box body 7.

[0034] After coating, the movable plug 904 is pushed to move by rotating the control screw 903, thereby changing the compression state of the adjustment spring 905, thereby controlling the force required for the deformation of the memory alloy spring 907, and then pushing the movable plug 904 to control the opening degree of the heating inlet 908 and the cooling inlet 909, thereby changing the temperature when the release film is dried. This is the working principle of the coating device for reducing coating interference rainbow patterns.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A coating device for reducing interference rainbow patterns in a coating, comprising a frame (1), characterized in that: One end of the frame (1) is connected to a winding roller frame (2) for winding up the release film, and a rewinding roller (3) is installed on the top of the other end of the frame (1); a plurality of guide rollers (4) for guiding and conveying the release film are arranged in the frame (1); a tension adjustment structure (5) for adjusting the conveying tension of the release film is installed above the middle area of ​​the frame (1); an auxiliary roller (6) for assisting in coating the release film is connected below the tension adjustment structure (5) in the frame (1); a box (7) is provided below the auxiliary roller (6); a coating structure (8) for coating the release film is installed in the box (7); and a drying structure (9) for drying the coated release film is installed on one side of the area between the tension adjustment structure (5) and the auxiliary roller (6) in the frame (1).

2. A coating device for reducing interference rainbow patterns of coatings according to claim 1, characterized in that: The tension adjustment structure (5) comprises a fixed block (501), a first threaded rod (502), an adjustment roller frame (503), and a limiting rod (504); at least two groups of fixed blocks (501) are connected inside the frame body (1); each group of fixed blocks (501) is threadedly connected to a first threaded rod (502); the upper end of each first threaded rod (502) is rotatably connected to an adjustment roller frame (503); at least one limiting rod (504) is connected below each adjustment roller frame (503); and the lower end of each limiting rod (504) passes through a corresponding fixed block (501) for limiting the position of the adjustment roller frame (503).

3. A coating device for reducing interference rainbow patterns of coating according to claim 1, characterized in that: The coating structure (8) comprises a coating roller (801), a chain (802), a connecting shaft (803), a fan blade cylinder (804), a scraper (805), a second threaded rod (806), a thickness limiting plate (807), and a thickness limiting roller frame (808); the coating roller (801) is rotatably connected inside the box body (7); one end of the coating roller (801) passes through the outer wall of the box body (7) and is connected to the chain (802) via a sprocket; the chain (802) is connected to the connecting shaft (803) via the sprocket; and the end of the connecting shaft (803) passes through and is rotatably connected to the box body (7). The connecting shaft (803) is located in the inner and outer wall regions of the box body (7) and is connected to a fan blade cylinder (804) for stirring and preventing material from settling. A scraper (805) is connected inside the box body (7), and the end of the scraper (805) is in contact with one side of the outer wall of the coating roller (801). The outer wall of the box body (7) is rotatably connected to a second threaded rod (806), the outer wall of the second threaded rod (806) is threadedly connected to a limited thickness plate (807), and a limiting recess is provided between the limited thickness plate (807) and the top of the box body (7), and the top of the limited thickness plate (807) is connected to a limited thickness roller frame (808).

4. A coating device for reducing interference rainbow patterns of coatings according to claim 3, characterized in that: The diameter of the coating roller (801) is larger than the diameter of the connecting shaft (803) to form a rotation speed difference. The upper ends of the scraper (805) and the thickness limiting plate (807) are both arranged to be inclined, and a mesh plate for filtering impurities is installed from the middle to the bottom of the scraper (805).

5. The coating device for reducing interference rainbow patterns of coating according to claim 1, characterized in that: The drying structure (9) comprises a nozzle plate (901), a barrel (902), a control screw (903), a movable plug (904), an adjustment spring (905), an opening plug (906), a memory alloy spring (907), a heating inlet (908), and a cooling inlet (909). A plurality of nozzle plates (901) are installed in the frame (1), and each nozzle plate (901) is connected to a barrel (902), and one end of each barrel (902) is threadedly connected to a control screw (903), and each control The screw rod (903) is located inside the cylinder (902) and is rotatably connected at one end to a movable plug (904); the other end of the movable plug (904) is connected to an adjustment spring (905); the other end of the adjustment spring (905) is connected to an opening plug (906); the other end of the opening plug (906) is connected to a memory alloy spring (907); the other end of the memory alloy spring (907) is connected to the inner wall of the cylinder (902); and the outer wall of the cylinder (902) is respectively connected to a heating inlet (908) and a cooling inlet (909).

6. A coating device for reducing interference rainbow patterns of coatings according to claim 5, characterized in that: The outer walls of the movable plug (904) and the opening plug (906) are both fitted to the inner wall of the cylinder (902); the opening plug (906) is configured to be a hollow cylinder, and the outer wall of the opening plug (906) is provided with an opening communicating with the interior.

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