Accurate glue coating device for adhesive tape production

Abstract

The invention discloses a precise glue coating device for adhesive tape production, comprising: a mounting table configured to have a platform for mounting components; the first mounting rack and the second mounting rack are arranged on the mounting table; the gluing roller is arranged on the first mounting frame; the scraping plate is arranged on the second mounting frame; the first cylinder is used for driving the gluing roller to move up and down; the second cylinder is used for driving the scraper to move up and down; the precise glue coating device for the adhesive tape production further comprises a movable ring, a glue coating roller and a glue coating roller, wherein the movable ring is sleeved on the glue coating roller; the first receiving box is arranged below the gluing roller; the movable ring can move along the side wall of the gluing roller, a first groove used for containing the first material receiving box is formed in the mounting table, and a cover plate is arranged on the first material receiving box; the glue spreader has the advantage that redundant glue on the glue spreader is convenient to clean.

Description

Technical Field

[0001] The invention belongs to the technical field of adhesive tape production, and in particular relates to a precise glue coating device for adhesive tape production. Background Art

[0002] Adhesive tape is any of a variety of backing materials coated with adhesive, which can be divided into sports tape, pressure-sensitive tape, box sealing tape, double-sided tape, pressure-sensitive tape and filament tape. When processing the adhesive tape, a glue coating device is usually required to glue the tape. The glue is accurately applied to the substrate through the appropriate pressure between the coating roller and the substrate, and then the glue is evenly spread using a scraping device.

[0003] For example, the publication number CN117085891A discloses a precise glue coating device for tape production, which belongs to the technical field of tape production, including a machine base, a flip linkage component and a secondary fine coating component are arranged on the machine base, and a preliminary glue coating component and a driving conversion component are arranged on the flip linkage component. The present invention can push the scraper to scrape back and forth on the tape substrate, and provide different pressures at the same time. When the pressure is high, the scraper can press the glue into the tape substrate, and when the pressure is low, it can allow a sufficient amount of glue to adhere to the surface of the tape substrate, that is, improve the adhesion of the glue to the substrate and improve the quality of the tape; it can make the scraper in a deflected state when scraping, so that the glue in the area with more glue on the tape substrate can move faster along the scraper to the area with insufficient glue, and at the same time, the final excess glue is discharged into the glue collecting groove to prevent the glue from accumulating more and more on the tape substrate; under the premise of ensuring the quality of the tape, the use of glue is reduced as much as possible to reduce the waste of glue.

[0004] In the prior art, the substrate is placed on the operating table at a uniform speed through the winding mechanism, and the material pump conveys and discharges the glue in the glue storage cylinder through the suction pipe and the delivery pipe, and the discharged glue flows into the gap between the collecting frame and the glue coating roller. The first motor is operated to drive the glue coating roller to rotate, so that the glue can be discharged evenly onto the substrate. However, a lot of glue will still adhere to the outer wall of the glue coating roller after use. If the glue is not cleaned in time, the glue will harden on the glue coating roller. The hardened glue adheres to the glue coating roller, causing uneven lumps to form on the surface of the glue coating roller, resulting in the glue coating roller being unable to evenly apply the glue to the substrate during subsequent use. Summary of the invention

[0005] The content of this application is used to introduce concepts in a brief form, which will be described in detail in the detailed implementation section below. The content of this application is not intended to identify the key features or essential features of the technical solution claimed for protection, nor is it intended to limit the scope of the technical solution claimed for protection.

[0006] In order to overcome the deficiencies of the prior art, the present invention provides a precise glue coating device for adhesive tape production.

[0007] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a precise glue coating device for tape production, comprising: a mounting table, which is constructed to have a platform for mounting components; a first mounting frame and a second mounting frame, which are arranged on the mounting table; a glue coating roller, which is arranged on the first mounting frame; a scraper, which is arranged on the second mounting frame; a first cylinder, which is used to drive the glue coating roller to move up and down; a second cylinder, which is used to drive the scraper to move up and down; the precise glue coating device for tape production also includes: a movable ring, which is sleeved on the glue coating roller; a first material receiving box, which is arranged under the glue coating roller; the movable ring can move along the side wall of the glue coating roller, and a first groove for accommodating the first material receiving box is provided on the mounting table, and a cover plate is provided on the first material receiving box.

[0008] Furthermore, the precise glue coating device for tape production also includes: a mounting block, connected to the piston rod of the first cylinder; a first motor, arranged on the mounting block; a mounting groove is provided on the mounting block, and the glue coating roller is arranged in the mounting groove; a first slider is provided on the movable ring, and a first slide groove is provided on the top of the mounting groove for the first slider to move, a threaded rod is provided in the first slide groove, a threaded hole is provided on the first slider, and the threaded rod passes through the threaded hole, and the output shaft of the first motor is connected to the threaded rod.

[0009] Furthermore, a guide groove is provided on the side wall of the installation groove, and the guide groove is a circular ring structure, and the inner diameter of the guide groove corresponds to the outer diameter of the glue coating roller.

[0010] Furthermore, the precise glue coating device for tape production also includes: a plurality of first movable rods, arranged on the glue coating roller; a rotating roller, arranged at one end of the first movable rod; a plurality of protrusions, arranged on the rotating roller; a cavity is provided on the glue coating roller, and a first through groove is provided on the side wall of the cavity for the first movable rod to pass through.

[0011] Furthermore, a guide block is provided on the side wall of the first through groove, a second sliding block is provided on the first movable rod, a second sliding groove for the second sliding block to move is provided on the guide block, and a first return spring is provided on the second sliding block.

[0012] Furthermore, a second through slot is provided on the side wall of the cavity, a second material receiving box is provided in the cavity, the second material receiving box is aligned with the second through slot, a collecting box is provided on the side wall of the mounting block, and the bottom surface of the second material receiving box is arranged to be inclined in the direction of the collecting box.

[0013] Furthermore, a third through slot is provided on the second material receiving box, a second movable rod is passed through the third through slot, a baffle is provided at one end of the second movable rod, and the baffle is aligned with the second through slot; a connecting rod is provided in the third through slot, a first movable slot is provided on the second movable rod, and the connecting rod is passed through the first movable slot.

[0014] Furthermore, a plurality of first protective films and a plurality of second protective films are laid on the rubber coating roller, and the first protective films and the second protective films are connected end to end and wrapped around the rubber coating roller; the first protective film is located outside the first through groove, and the second protective film is located outside the second through groove, the first protective film is made of rubber, and the second protective film is made of gauze.

[0015] Furthermore, a plurality of second grooves are provided on the inner wall of the movable ring, a movable block and a first connecting spring are provided in the second groove, the movable block is connected to the inner wall of the second groove through the first connecting spring, and the second groove corresponds to the position of the first through groove.

[0016] Furthermore, a first connecting block is provided on the collection box, a second connecting block is provided on the side wall of the mounting block, a second movable groove is provided on the first connecting block, a fixed block and a second connecting spring are provided in the second movable groove, and the fixed block is connected to the second movable groove through the second connecting spring; a fixed groove corresponding to the fixed block is provided on the second connecting block, a push plate is provided in the fixed groove, a push rod is provided on the push plate, and the push rod passes through the fixed groove.

[0017] The invention is beneficial in that it provides a precise glue coating device for adhesive tape production, which is convenient for cleaning excess glue on a glue coating roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The illustrative embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application.

[0019] In addition, throughout the drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and that the components and elements are not necessarily drawn to scale.

[0020] In the attached picture: Figure 1 It is a schematic structural diagram of a precise glue coating device for adhesive tape production in one embodiment of the present invention.

[0021] Figure 2 for Figure 1 A cross-sectional view of the glue coating roller of the precise glue coating device for adhesive tape production in the embodiment Figure 1 .

[0022] Figure 3 for Figure 2 Enlarged view of point A in .

[0023] Figure 4 for Figure 1 A cross-sectional view of the glue coating roller of the precise glue coating device for adhesive tape production in the embodiment Figure 2 .

[0024] Figure 5 for Figure 4 Enlarged view of point B in .

[0025] Figure 6 for Figure 4 Enlarged view of point C in the figure.

[0026] Figure 7 for Figure 1 A cross-sectional view of the third slider of the device for precise glue coating for adhesive tape production in the embodiment.

[0027] Figure 8 for Figure 7 Enlarged view of point D in .

[0028] Fig. 9 for Figure 1 A cross-sectional view of a collecting box of the device for precisely applying glue for producing adhesive tapes in the embodiment.

[0029] Fig.10 for Fig. 9 Enlarged view of point E in FIG.

[0030] The meanings of the reference numerals in the figures are as follows: 101, mounting table; 102, first mounting frame; 103, second mounting frame; 104, first cylinder; 105, second cylinder; 106, scraper; 107, mounting block; 108, glue storage box; 109, first slider; 110, threaded rod; 111, infusion cavity; 112, first material receiving box; 113, cover plate; 114, glue roller; 115, first movable rod; 1151, second slider; 1152, first return spring; 116, guide block; 117, roller; 1171, bump; 1172, third slider; 1173, second return spring; 118, first Second material receiving box; 1181, connecting rod; 119, second movable rod; 1191, baffle; 120, second protective film; 121, first protective film; 122, movable ring; 123, movable block; 1231, first connecting spring; 124, connecting shaft; 1241, transfer chamber; 125, guide groove; 126, collecting box; 127, third connecting block; 128, first motor; 129, guide block; 130, second motor; 131, first connecting block; 132, fixed block; 1321, second connecting spring; 133, second connecting block; 134, push plate; 1341, push rod. DETAILED DESCRIPTION

[0031] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes and are not intended to limit the scope of protection of the present disclosure.

[0032] It should also be noted that, for ease of description, only the parts related to the invention are shown in the drawings. In the absence of conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other.

[0033] It should be noted that the concepts such as "first" and "second" mentioned in the present disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0034] It should be noted that the modifications of "one" and "plurality" mentioned in the present disclosure are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0035] The names of the messages or information exchanged between multiple devices in the embodiments of the present disclosure are only used for illustrative purposes and are not used to limit the scope of these messages or information.

[0036] The present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0037] like Figure 1-10As shown, a precise glue coating device for tape production includes a mounting platform 101, a first mounting frame 102, a second mounting frame 103, a glue coating roller 114, a scraper 106, a first cylinder 104, a second cylinder 105, a movable ring 122 and a first receiving box 112; the mounting platform 101 is constructed to have a platform for mounting components; the first mounting frame 102 and the second mounting frame 103 are arranged on the mounting platform 101, and the second mounting frame 103 is located on one side of the first mounting frame 102; the glue coating roller 114 is arranged on the first mounting frame 102; the scraper 106 is arranged on the second mounting frame 1 03; the first cylinder 104 is installed on the first mounting frame 102 to drive the glue coating roller 114 to move up and down; the second cylinder 105 is installed on the second mounting frame 103 to drive the scraper 106 to move up and down; the movable ring 122 is sleeved on the glue coating roller 114; the first material receiving box 112 is arranged under the glue coating roller 114; the movable ring 122 can move along the side wall of the glue coating roller 114, and the mounting platform 101 is provided with a first groove for accommodating the first material receiving box 112, and the first material receiving box 112 is provided with a cover plate 113, and the cover plate 113 is provided with a fourth through groove corresponding to the movable ring 122.

[0038] When the device is in normal use, the cover plate 113 covers the first material receiving box 112, the cover plate 113 and the surface of the mounting platform 101 are on the same plane, the adhesive tape passes over the mounting platform 101, the first cylinder 104 and the second cylinder 105 respectively drive the glue coating roller 114 and the scraper 106 to descend and contact the adhesive tape, the glue coating roller 114 applies glue on the adhesive tape, and the scraper 106 spreads the glue evenly on the adhesive tape; after the adhesive tape is glued, the cover plate 113 is opened, the movable ring 122 moves along the glue coating roller 114, the side wall of the movable ring 122 contacts the side wall of the glue coating roller 114 to scrape off the glue on the glue coating roller 114, and the glue falls into the first material receiving box 112, and the surface of the glue coating roller 114 is cleaned to prevent the glue from hardening and forming lumps on the surface of the glue coating roller 114.

[0039] Furthermore, a mounting block 107 is provided on the piston rod of the first cylinder 104, a mounting groove is provided on the mounting block 107, a glue coating roller 114 is provided in the mounting groove, connecting shafts 124 are provided at both ends of the glue coating roller 114, and a connecting groove corresponding to the connecting shaft 124 is provided on the inner wall of the mounting groove; a first slider 109 is provided on the movable ring 122, a first slide groove for the first slider 109 to move is provided at the top of the mounting groove, a threaded rod 110 is provided in the first slide groove, a threaded hole is provided on the first slider 109, and the threaded rod 110 passes through the threaded hole; a third connecting block 127 is provided on the side wall of the mounting block 107, a first motor 128 is provided on the third connecting block 127, and the output shaft of the first motor 128 is connected to the threaded rod 110; the first motor 128 drives the threaded rod 110 to rotate to provide power for the movement of the movable ring 122.

[0040] A guide groove 125 is provided on the side wall of the mounting groove. The guide groove 125 is a circular ring structure. The inner diameter of the guide groove 125 corresponds to the outer diameter of the glue coating roller 114, and an opening is provided at the bottom of the guide groove 125. The movable ring 122 pushes the glue on the surface of the glue coating roller 114 into the guide groove 125. The glue in the guide groove 125 flows along the inner wall of the guide groove 125, and the glue falls from the opening into the first material receiving box 112, so as to facilitate the recovery of the glue cleaned from the glue coating roller 114.

[0041] The glue coating roller 114 is provided with a cavity, in which a plurality of first movable rods 115 and a rotating roller 117 are provided. The rotating roller 117 is located in the middle of the cavity, and a plurality of protrusions 1171 are provided on the rotating roller 117. A first through groove for the first movable rod 115 to pass through is provided on the side wall of the cavity.

[0042] A guide block 116 is disposed on the side wall of the first through slot, a second slider 1151 is disposed on the first movable rod 115 , a second slide groove for the second slider 1151 to move is disposed on the guide block 116 , and a first return spring 1152 is disposed on the second slider 1151 .

[0043] Furthermore, a second through groove is provided on the side wall of the cavity, a second material receiving box 118 is provided in the cavity, the second material receiving box 118 is aligned with the second through groove, a collecting box 126 is provided on the side wall of the mounting block 107, the bottom surface of the second material receiving box 118 is inclined in the direction of the collecting box 126, and a transfer cavity 1241 connecting the collecting box 126 and the cavity is provided on the connecting shaft 124, and the transfer cavity 1241 is in an expanded structure, so that the glue entering the transfer cavity 1241 can flow out of the transfer cavity 1241.

[0044] A third through slot is provided on the second material receiving box 118, and a second movable rod 119 is passed through the third through slot. A baffle 1191 is provided at one end of the second movable rod 119, and the baffle 1191 is aligned with the second through slot; a connecting rod 1181 is provided in the third through slot, and a first movable slot is provided on the second movable rod 119, and the connecting rod 1181 is passed through the first movable slot.

[0045] A plurality of first protective films 121 and a plurality of second protective films 120 are laid on the glue coating roller 114, and the first protective films 121 and the second protective films 120 are connected end to end and wound around the glue coating roller 114; the first protective film 121 is located outside the first through groove, and the second protective film 120 is located outside the second through groove, the first protective film 121 is made of rubber, and the second protective film 120 is made of gauze.

[0046] A guide block 129 is provided on the side wall of the mounting block 107, a guide groove for the guide block 129 to move is provided on the side wall of the mounting groove, a second motor 130 is provided on the guide block 129, an output shaft of the second motor 130 is connected to the rotating shaft, and the third connecting block 127 is also in the guide groove; a third slider 1172 is provided on the rotating shaft, a third slide groove for the third slider 1172 to move is provided on the connecting shaft 124, the third slide groove is an arc structure, a second return spring 1173 is provided on the third slider 1172, and one end of the second return spring 1173 rests on the inner wall of the third slide groove.

[0047] An installation cavity is provided on the installation block 107, and a glue storage box 108 is provided in the installation cavity. The installation cavity is located above the installation slot. An infusion cavity 111 is provided at the bottom of the installation cavity. The infusion cavity 111 is communicated with the installation slot. A solenoid valve is provided in the infusion cavity 111, and the solenoid valve is used to control the on and off of the infusion cavity 111; a glue outlet is provided at the bottom of the glue storage box 108, and the glue outlet is aligned with the infusion cavity 111 when the glue storage box 108 is installed in the installation cavity.

[0048] When applying glue to the adhesive tape, the second motor 130 assists the glue roller 114 in rotating. When the second motor 130 drives the rotating roller 117 to rotate, the rotating roller 117 first rotates relative to the glue roller 114, and the protrusion 1171 rotates to the side of the second movable rod 119. The protrusion 1171 is staggered with the first movable rod 115, and the first movable rod 115 shrinks in the cavity. The baffle 1191 moves to the second through groove to close the second through groove. At this time, there is no protrusion on the surface of the glue roller 114, and the glue falls on the adhesive tape. On the glue coating roller 114, the second motor 130 continues to drive the roller 117 to rotate. After the third slider 1172 cannot move in the third slide groove, the roller 117 drives the glue coating roller 114 to rotate. The glue coating roller 114 rotates to apply glue on the adhesive tape. When the film roll is replaced or the glue coating operation needs to be temporarily stopped, the second motor 130 stops working, the second return spring 1173 pushes the third slider 1172 to move back, and the roller 117 rotates relative to the glue coating roller 114 so that the protrusion 1171 rotates. The first movable rod 115 moves to one side of the first movable rod 115. At this time, the second movable rod 119 at the top loses its supporting force and moves downward. The baffle 1191 moves into the cavity to open the second through slot. The protrusion 1171 pushes the first movable rod 115 to move so that the first movable rod 115 extends out of the first through slot. The first movable rod 115 is against the first protective film 121 to deform the first protective film 121. A protrusion is generated on the surface of the glue coating roller 114 to separate the surface of the glue coating roller 114 into multiple independent areas. At this time, the glue still falls on the top of the glue coating roller 114, and the glue penetrates into the second through slot through the second protective film 120. The glue falls into the second material receiving box 118 and flows into the collecting box 126 to avoid the situation where too much glue is gathered at the top of the glue coating roller 114 due to the glue coating roller 114 stopping its rotation, thereby causing some areas on the tape to be coated with too much glue. The part of the glue is recovered through the collecting box 126 to reduce the waste of glue so that the part of the glue can be put into use again.

[0049] Furthermore, a plurality of second grooves are provided on the inner wall of the movable ring 122, and a movable block 123 and a first connecting spring 1231 are provided in the second groove. The movable block 123 is connected to the inner wall of the second groove through the first connecting spring 1231, and the second groove corresponds to the position of the first through groove. The setting of the movable block 123 enables the first movable rod 115 to move normally, thereby preventing the movable ring 122 from obstructing the movement of the first movable rod 115. At the same time, the movable ring 122 can scrape off the glue on the surface of the first protective film 121 and the second protective film 120 when moving, thereby preventing the glue from remaining on the glue coating roller 114 and agglomerating on the glue coating roller 114.

[0050] Furthermore, a first connecting block 131 is provided on the collecting box 126, a second connecting block 133 is provided on the side wall of the mounting block 107, a second movable groove is provided on the first connecting block 131, a fixing block 132 and a second connecting spring 1321 are provided in the second movable groove, and the fixing block 132 is connected to the second movable groove through the second connecting spring 1321; a fixing groove corresponding to the fixing block 132 is provided on the second connecting block 133, a push plate 134 is provided in the fixing groove, a push rod 1341 is provided on the push plate 134, the push rod 1341 passes through the fixing groove, and an inclined surface is provided on the side wall of the fixing block 132; a third movable groove for moving the collecting box 126 is provided on the side wall of the mounting groove, and the third movable groove connects the mounting groove with the outside.

[0051] The collecting box 126 and the guide block 129 cooperate with each other to make the movement of the mounting block 107 more stable under the drive of the first cylinder 104; after a specified amount of glue is collected in the collecting box 126, the push rod 1341 is pushed, and the push plate 134 withdraws the fixing block 132 from the fixing groove, and the collecting box 126 can be directly removed from the mounting block 107, and the glue in the collecting box 126 can be recycled.

[0052] The above descriptions are only some preferred embodiments of the present disclosure and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the embodiments of the present disclosure is not limited to the technical solutions formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the embodiments of the present disclosure.

Claims

1. A precise glue coating device for adhesive tape production, comprising: A mounting table configured to have a platform for mounting components; A first mounting frame and a second mounting frame are arranged on the mounting platform; A glue coating roller, arranged on the first mounting frame; a scraper, disposed on the second mounting frame; A first cylinder, used for driving the glue coating roller to move up and down; A second cylinder is used to drive the scraper to move up and down; Features: The precise glue coating device for tape production also includes: A movable ring, sleeved on the glue coating roller; A first material receiving box, arranged below the glue coating roller; The movable ring can move along the side wall of the glue coating roller, and the mounting platform is provided with a first groove for accommodating the first material receiving box, and the first material receiving box is provided with a cover plate.

2. The precise glue coating device for adhesive tape production according to claim 1, characterized in that: Also includes: A mounting block connected to the piston rod of the first cylinder; A first motor, disposed on the mounting block; The mounting block is provided with a mounting groove, and the glue coating roller is arranged in the mounting groove; the movable ring is provided with a first slider, and the top of the mounting groove is provided with a first slide groove for the first slider to move, a threaded rod is provided in the first slide groove, and the first slider is provided with a threaded hole, and the threaded rod passes through the threaded hole, and the output shaft of the first motor is connected to the threaded rod.

3. The precise glue coating device for adhesive tape production according to claim 2, characterized in that: A guide groove is arranged on the side wall of the installation groove, and the guide groove is a circular ring structure, and the inner diameter of the guide groove corresponds to the outer diameter of the glue coating roller.

4. The precise glue coating device for adhesive tape production according to claim 2, characterized in that: Also includes: A plurality of first movable rods, arranged on the glue coating roller; A rotating roller, arranged at one end of the first movable rod; A plurality of protrusions are arranged on the rotating roller; The glue coating roller is provided with a cavity, and the side wall of the cavity is provided with a first through groove for the first movable rod to pass through.

5. The precise glue coating device for adhesive tape production according to claim 4, characterized in that: A guide block is provided on the side wall of the first through slot, a second slider is provided on the first movable rod, a second slide groove for the second slider to move is provided on the guide block, and a first return spring is provided on the second slider.

6. The precise glue coating device for adhesive tape production according to claim 5, characterized in that: A second through slot is provided on the side wall of the cavity, a second material receiving box is provided in the cavity, the second material receiving box is aligned with the second through slot, a collecting box is provided on the side wall of the mounting block, and the bottom surface of the second material receiving box is arranged obliquely to the direction of the collecting box.

7. The precise glue coating device for adhesive tape production according to claim 6, characterized in that: The second material receiving box is provided with a third through slot, a second movable rod is passed through the third through slot, a baffle is provided at one end of the second movable rod, and the baffle is aligned with the second through slot; a connecting rod is provided in the third through slot, a first movable slot is provided on the second movable rod, and the connecting rod is passed through the first movable slot.

8. The precise glue coating device for adhesive tape production according to claim 6, characterized in that: The rubber coating roller is covered with a plurality of first protective films and a plurality of second protective films, and the first protective films and the second protective films are connected end to end and wound around the rubber coating roller; the first protective film is located outside the first through groove, and the second protective film is located outside the second through groove, the first protective film is made of rubber, and the second protective film is made of gauze.

9. The precise glue coating device for adhesive tape production according to claim 4, characterized in that: A plurality of second grooves are arranged on the inner wall of the movable ring, a movable block and a first connecting spring are arranged in the second groove, the movable block is connected to the inner wall of the second groove through the first connecting spring, and the second groove corresponds to the position of the first through groove.

10. The precise glue coating device for adhesive tape production according to claim 6, characterized in that: The collecting box is provided with a first connecting block, the side wall of the mounting block is provided with a second connecting block, the first connecting block is provided with a second movable groove, a fixing block and a second connecting spring are provided in the second movable groove, and the fixing block is connected to the second movable groove through the second connecting spring; the second connecting block is provided with a fixing groove corresponding to the fixing block, a push plate is provided in the fixing groove, a push rod is provided on the push plate, and the push rod passes through the fixing groove.

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