Release paper gluing equipment for adhesive tape production

By designing a release paper glue coating equipment for tape production including feeding box and agitating components, the problems of low glue recovery efficiency and impurities mixing in the prior art are solved, and efficient recycling and reuse of glue is achieved.

CN119634145AInactive Publication Date: 2025-03-18NINGBO LAILIBAO NEW MATERIALS CO LTD
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Patent Information

Application Number
CN202510169460.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-02-17
Publication Date
2025-03-18
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

It is difficult for existing tape production equipment to effectively recover excess glue during the glue application process, and the recycled glue is easily mixed with impurities such as hair, affecting the reuse of glue.

Method used

A release paper glue coating equipment for tape production is designed. The combination of a feeding box and a stirring assembly is used to wrap the hair in the feeding box and collect it through the rotation of the mixing assembly. At the same time, the excess glue is guided into the feeding box for recycling using a scraper and a through-trough system.

Benefits of technology

The efficient recycling of glue and effective hair removal are achieved, so that the recycled glue can be reused directly, and the efficiency and quality of the tape production process are improved.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention discloses release paper gluing equipment for adhesive tape production, and the release paper gluing equipment comprises a processing table which is constructed to be provided with a platform for mounting parts; the first mounting frame and the second mounting frame are arranged on the processing 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 release paper gluing equipment for adhesive tape production further comprises a material receiving box arranged at the bottom of the processing table; the stirring assembly is arranged in the material receiving box; the first motor is arranged on the processing table and used for driving the stirring assembly to rotate; when the stirring assembly rotates, the hair in the material receiving box is wound on the stirring assembly, and the hair in the material receiving box is collected; the glue recycling device has the advantages that glue is conveniently recycled, hair impurities in the glue are removed, and the recycled glue can be directly used.
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Description

Technical Field

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

[0002] Tape is a common adhesive material, widely used in packaging, sealing, fixing, marking and other fields. It is mainly divided into: transparent tape, packaging tape, double-sided tape, electrical tape, low-viscosity tape, etc. In addition to the above types, there are many other special-purpose tapes, such as foam tape, printing tape, carpet tape, Cambridge tape, etc. They are designed for different application needs and have their own characteristics and advantages. In the production process of tape, gluing tape is a common process. Different tape substrates and glues can be selected according to the purpose of the tape. Pressure control during the coating process is the key to ensure coating uniformity and good adhesion between glue and substrate. Appropriate pressure between the coating head and the substrate can make the glue evenly adhere to the substrate and improve the bonding strength; then the glue is applied by scraper or roller, spraying, etc., and then dried and packaged.

[0003] The Chinese utility model patent with announcement number CN214864799U in the prior art provides a glue uniform coating device for adhesive tape production, which mainly includes a coating device body, a glue tank is fixedly connected to the top of the coating device body, and a glue hose is connected to the bottom of the left side of the glue tank. The advantages are: it solves the problem that the existing coating device is uneven when coating, and it is easy to leak glue in some areas or apply too much glue, which affects the quality of the adhesive tape and reduces the practicality of the coating device to a certain extent. However, the disadvantage is that the device simply uses a scraper to directly apply excess glue to the surrounding glue shortage. If there is too much excess glue, it is inconvenient to recycle the glue. At the same time, impurities such as hair are easily mixed in the recycled glue, making the recycled glue unable to be directly put into use. Summary of the invention

[0004] 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.

[0005] In order to overcome the deficiencies of the prior art, the present invention provides a release paper gluing device for producing adhesive tapes.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a release paper gluing equipment for tape production, comprising: a processing table, which is constructed with a platform for installing components; a first mounting frame and a second mounting frame, which are arranged on the processing table; a gluing 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 gluing roller to move up and down; a second cylinder, which is used to drive the scraper to move up and down; the release paper gluing equipment for tape production also includes: a material receiving box, which is arranged at the bottom of the processing table; a stirring assembly, which is arranged in the material receiving box; a first motor, which is arranged on the processing table and is used to drive the stirring assembly to rotate; when the stirring assembly rotates, the hair in the material receiving box is wrapped around the stirring assembly to collect the hair in the receiving box.

[0007] Furthermore, a first through groove is provided on the processing table, the first through groove is located below the second mounting frame, and a guiding groove facing the first through groove is provided on the scraper.

[0008] Furthermore, the stirring assembly includes: a rotating shaft, which is arranged in the material receiving box; a plurality of stirring rods, which are arranged on the rotating shaft; a plurality of hooks, which are arranged on the stirring rods; and the material receiving box is a cylindrical structure.

[0009] Furthermore, a connecting part is provided on the top of the material receiving box, and a mounting groove corresponding to the rotating shaft is provided on the inner wall of the connecting part. A first through hole and multiple second through holes are provided on the side wall of the material receiving box. The mounting groove is communicated with the first through hole. A connecting rod is passed through the second through hole. A limiting plate is provided at one end of the connecting rod and a connecting plate is provided at the other end. A stop shaft is provided on the connecting plate, and a stop groove corresponding to the stop shaft is provided on the rotating shaft.

[0010] Furthermore, the release paper gluing equipment for tape production also includes: a first mounting block connected to the processing table; a guide rail arranged at the bottom of the processing table; a first motor arranged on the first mounting block, the first mounting block is located on one side of the processing table, and a guide block corresponding to the guide rail is arranged on the connecting part.

[0011] Furthermore, the release paper gluing equipment for tape production also includes: a mounting plate, connected to the piston rod of the first cylinder; a glue storage box, arranged on the mounting plate; a glue coating roller arranged on the mounting plate, the glue storage box is located above the glue coating roller, a glue outlet is provided at the bottom of the glue storage box, and a second through groove corresponding to the glue outlet is provided on the mounting plate.

[0012] Furthermore, a reinforcing block is provided on the mounting plate, the reinforcing block is a triangular structure, a first movable groove is provided on the reinforcing block, a cleaning plate and a first electromagnet are provided in the first movable groove, a connecting spring is provided on the cleaning plate, one end of the connecting spring is fixedly connected to the inner wall of the first movable groove, and a guide groove is provided on the cleaning plate.

[0013] Furthermore, a third through groove is provided on the processing table, and the third through groove is located below the reinforcing block. A connecting block is provided at the bottom of the processing table, and a transfer cavity communicated with the third through groove is provided on the connecting block. A liquid inlet communicated with the transfer cavity is provided on the side wall of the receiving box; a heating block is provided on the connecting block.

[0014] Furthermore, a liquid outlet is provided at the bottom of the material receiving box, a push rod is passed through the liquid outlet, a sealing plate is provided at the top of the push rod, the cross-section of the push rod is smaller than the cross-section of the liquid outlet, a guide rod is provided in the liquid outlet, a second movable groove is provided on the push rod, and the guide rod is passed through the second movable groove; a push plate is provided on the inner wall of the glue storage box.

[0015] Furthermore, a support plate is provided on the side wall of the glue storage box, a groove corresponding to the support plate is provided on the guide block, and a cover plate is provided on the top of the material receiving box.

[0016] The invention is beneficial in that it provides a release paper gluing device for adhesive tape production, which is convenient for recycling glue and removing hair impurities in the glue so that the recycled glue can be directly used. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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.

[0018] 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.

[0019] In the attached picture: Figure 1 The present invention is a schematic structural diagram of a release paper gluing device for producing adhesive tapes in one embodiment of the present invention.

[0020] Figure 2 for Figure 1 An overall cross-sectional view of a release paper gluing device for adhesive tape production in the illustrated embodiment.

[0021] Figure 3 for Figure 2 Enlarged view of point A in .

[0022] Figure 4 for Figure 2 Enlarged view of point B in .

[0023] Figure 5 for Figure 1 A cross-sectional view of a material receiving box of a release paper gluing device for producing adhesive tape in the illustrated embodiment.

[0024] Figure 6 for Figure 5 Enlarged view of point C in the figure.

[0025] The meanings of the reference numerals in the figures are as follows: 101, processing table; 102, first mounting frame; 103, second mounting frame; 104, first cylinder; 105, second cylinder; 106, scraper; 107, glue storage box; 1071, push plate; 108, support plate; 109, cover plate; 110, material receiving box; 111, connecting block; 112, heating block; 113, glue coating roller; 114, second baffle; 115, second slider; 116, second electromagnet; 117, push rod; 1171, sealing plate; 118. guide rod; 119. cleaning plate; 1191. connecting spring; 120. first baffle; 1201. first slider; 1202. return spring; 121. rotating shaft; 1211. stirring rod; 1212. hook; 122. guide rail; 123. guide block; 1231. groove; 124. connecting rod; 125. limit plate; 126. connecting plate; 127. anti-rotation shaft; 128. first mounting block; 129. first motor; 130. second mounting block. DETAILED DESCRIPTION

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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".

[0030] 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.

[0031] The present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0032] like Figure 1-6 As shown, a release paper gluing device for tape production includes a processing table 101, a first mounting frame 102, a second mounting frame 103, a gluing roller 113, a scraper 106, a first cylinder 104, a second cylinder 105, a material receiving box 110, a stirring assembly and a first motor 129; the processing table 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 processing table 101; the gluing roller 113 is arranged on the first mounting frame 102; the scraper 106 is arranged on the second mounting frame The first cylinder 104 is mounted on the first mounting frame 102 and is used to drive the glue coating roller 113 to move up and down; the second cylinder 105 is mounted on the second mounting frame 103 and is used to drive the scraper 106 to move up and down; the material receiving box 110 is connected to the bottom of the processing table 101; the stirring component is arranged in the material receiving box 110; the first motor 129 is arranged on the processing table 101 and is used to drive the stirring component to rotate; when the stirring component rotates, the hair in the material receiving box 110 is wrapped around the stirring component to collect the hair in the material receiving box 110.

[0033] A first through groove is provided on the processing table 101, and the first through groove is located below the second mounting frame 103. A guide groove facing the first through groove is provided on the scraper 106, and the guide groove is inclined so that the glue liquid against the scraper 106 flows along the inclined surface of the guide groove to guide the excess glue to the first through groove, so that the excess glue falls into the receiving box 110 through the first through groove, and the excess glue is recovered.

[0034] Furthermore, the stirring assembly includes a rotating shaft 121, a plurality of stirring rods 1211 and a plurality of hooks 1212; the rotating shaft 121 is arranged in the material receiving box 110; the stirring rods 1211 are evenly distributed on the rotating shaft 121 in a circumferential manner; the hooks 1212 are evenly distributed on the stirring rods 1211 in a circumferential manner; the material receiving box 110 is a cylindrical structure, so that the rotating shaft 121 is more closely fitted to the inner wall of the material receiving box 110 when rotating, and is in full contact with the glue in the material receiving box 110; through the arrangement of the hooks 1212, the rotating shaft 121 can wrap the hair in the glue around the stirring rods 1211 when rotating, and the hair in the glue is cleaned and collected, so that the recovered glue can be directly used.

[0035] A connecting portion is provided on the top of the material receiving box 110, and a mounting groove corresponding to the rotating shaft 121 is provided on the inner wall of the connecting portion. A first through hole and multiple second through holes are provided on the side wall of the material receiving box 110, and the mounting groove is communicated with the first through hole. A connecting rod 124 is passed through the second through hole, and a limiting plate 125 is provided at one end of the connecting rod 124, and a connecting plate 126 is provided at the other end. The connecting plate 126 is rotatably connected to the connecting rod 124, and a stop shaft 127 is provided on the connecting plate 126. A stop groove corresponding to the stop shaft 127 is provided on the rotating shaft 121; when disassembling the rotating shaft 121, the connecting plate 126 can be pushed toward the outside of the material receiving box 110 to make the stop shaft 127 disengage from the stop groove, so that the rotating shaft 121 can be taken out of the mounting groove, so that the rotating shaft 121 can be quickly disassembled to clean the hair.

[0036] Furthermore, a first mounting block 128 is connected to the processing table 101, and a guide rail 122 is provided at the bottom of the processing table 101; the first motor 129 is arranged on the first mounting block 128, and the first mounting block 128 is located on one side of the processing table 101, and a guide block 123 corresponding to the guide rail 122 is provided on the connecting portion; it is only necessary to push the guide block 123 from one end of the guide rail 122 until the guide block 123 is pushed to the bottom end of the guide rail 122 so that the output shaft of the first motor 129 and the connecting plate 126 can form a transmission fit.

[0037] A mounting plate is provided on the piston rod of the first cylinder 104, a third slider is provided on the mounting plate, and a third slide groove for movement of the third slider is provided on the first mounting frame 102; a glue storage box 107 is provided on the mounting plate, and a glue coating roller 113 is provided on the mounting plate, the glue storage box 107 is located above the glue coating roller 113, a glue outlet is provided at the bottom of the glue storage box 107, and a second through groove corresponding to the glue outlet is provided on the mounting plate; a first baffle 120 is provided at the bottom of the second through groove, a first slider 1201 is provided on the first baffle 120, a first slide groove for movement of the first slider 1201 is provided at the bottom of the mounting plate, a return spring 1202 is provided on the first slider 1201, a second electromagnet 116 is provided at one end of the first slide groove, and the first baffle 120 is made of ferromagnetic metal; the movement of the first baffle 120 is controlled by the setting of the second electromagnet 116 and the return spring 1202, and the on and off of the second through groove is controlled, so that glue has been coated on the glue coating roller 113.

[0038] A reinforcing block is provided on the mounting plate, and the reinforcing block is a triangular structure. The structural strength of the mounting plate is improved by the setting of the reinforcing block; a first movable groove is provided on the reinforcing block, and a cleaning plate 119 and a first electromagnet are provided in the first movable groove. The cleaning plate 119 is made of a magnet, and a connecting spring 1191 is provided on the cleaning plate 119. One end of the connecting spring 1191 is fixedly connected to the inner wall of the first movable groove, and a guide groove is provided on the cleaning plate 119.

[0039] A second mounting block 130 is disposed on the mounting plate, and a second motor is disposed on the second mounting block 130 . The output shaft of the second motor is connected to the glue coating roller 113 , and the second motor can drive the glue coating roller 113 to rotate.

[0040] A third through slot is provided on the processing table 101, and the third through slot is located below the reinforcing block. A second baffle 114 is provided at the third through slot, and a second slider 115 is provided on the second baffle 114. A second slide groove for the second slider 115 to move is provided on the processing table 101, and a third electromagnet is provided at one end of the second slide groove, and the second baffle 114 is made of a magnet; a connecting block 111 is provided at the bottom of the processing table 101, and a transfer cavity communicated with the third through slot is provided on the connecting block 111, and a liquid inlet communicated with the transfer cavity is provided on the side wall of the receiving box 110; a heating block 112 is provided on the connecting block 111, and the heating block 112 heats the glue in the transfer cavity, so that the glue in the transfer cavity is in a flowing state, thereby preventing the glue from hardening in the transfer cavity.

[0041] A liquid outlet is provided at the bottom of the material receiving box 110, a push rod 117 is passed through the liquid outlet, a sealing plate 1171 is provided at the top of the push rod 117, the cross-section of the push rod 117 is smaller than the cross-section of the liquid outlet, a guide rod 118 is provided in the liquid outlet, a second movable groove is provided on the push rod 117, and the guide rod 118 is passed through the second movable groove; a push plate 1071 is provided on the inner wall of the glue storage box 107.

[0042] A support plate 108 is provided on the side wall of the glue storage box 107 , and a groove 1231 corresponding to the support plate 108 is provided on the guide block 123 . When the receiving box 110 is placed on the glue storage box 107 , a cover plate 109 is provided on the top thereof.

[0043] The excess glue on the adhesive tape falls from the first through slot after being guided by the scraper 106, and the glue falls into the material receiving box 110, and the excess glue is collected; after the gluing operation is completed, the first baffle 120 is lowered to the second through slot to close, the first electromagnet is energized to generate a magnetic force that repels the cleaning plate 119, the first electromagnet pushes the cleaning plate 119 to move out of the first movable slot, the cleaning plate 119 is against the glue coating roller 113, the second motor drives the glue coating roller 113 to rotate, the cleaning plate 119 scrapes off the glue on the surface of the glue coating roller 113 to prevent the residual glue on the glue coating roller 113 from agglomerating to form a bump on the glue coating roller 113; the glue on the cleaning plate 119 is guided by the guide groove and falls to the third through slot, at this time the third through slot is in an open state, the glue falls into the transfer cavity through the third through slot, the glue flows along the inner wall of the transfer cavity to the material receiving box 110, and the glue scraped off the glue coating roller 113 is collected.

[0044] When the receiving box 110 is at the bottom of the processing table 101, the first motor 129 continuously drives the rotating shaft 121 to rotate, and the stirring rod 1211 rotates to collect the hair in the glue, and collects the hair. At the same time, the stirring rod 1211 stirs the glue to make the glue in a flowing state to prevent the glue from solidifying; after the glue on the cleaning plate 119 falls into the receiving box 110, the receiving box 110 is removed from the processing table 101, and then the receiving box 110 is placed on the top of the glue storage box 107, and the support plate 108 is inserted into the groove 123 at the bottom of the guide block 123. 1, the material receiving box 110 is fixed on the top of the glue storage box 107, the push rod 117 is pressed against the push plate 1071 and moves relative to the material receiving box 110, the sealing plate 1171 moves upward to open the liquid outlet, and the glue in the material receiving box 110 flows into the glue storage box 107 through the liquid outlet; the rotating shaft 121 is taken out from the material receiving box 110 along the installation groove, the hair on the stirring rod 1211 is cleaned, and the cover plate 109 is covered on the material receiving box 110 to prevent dust from falling into the material receiving box 110, and the glue in the material receiving box 110 is directly recovered.

[0045] 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 release paper gluing device for adhesive tape production, comprising: a processing table configured to have a platform for mounting a component; A first mounting frame and a second mounting frame are arranged on the processing table; 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 release paper gluing equipment for producing adhesive tape also includes: A material receiving box is arranged at the bottom of the processing table; A stirring component is arranged in the material receiving box; A first motor, disposed on the processing table, for driving the stirring assembly to rotate; When the stirring component rotates, the hair in the material receiving box is wound around the stirring component to collect the hair in the material receiving box.

2. The release paper gluing equipment for adhesive tape production according to claim 1, characterized in that: The processing table is provided with a first through slot, the first through slot is located below the second mounting frame, and the scraper is provided with a guide slot facing the first through slot.

3. The release paper gluing equipment for adhesive tape production according to claim 1, characterized in that: The stirring assembly comprises: A rotating shaft is arranged in the material receiving box; A plurality of stirring rods are arranged on the rotating shaft; A plurality of hooks are arranged on the stirring rod; The material receiving box is a cylindrical structure.

4. The release paper gluing equipment for adhesive tape production according to claim 3, characterized in that: A connecting portion is provided on the top of the material receiving box, and a mounting groove corresponding to the rotating shaft is provided on the inner wall of the connecting portion. A first through hole and multiple second through holes are provided on the side wall of the material receiving box. The mounting groove is communicated with the first through hole, and a connecting rod is passed through the second through hole. A limiting plate is provided at one end of the connecting rod, and a connecting plate is provided at the other end. A stop shaft is provided on the connecting plate, and a stop groove corresponding to the stop shaft is provided on the rotating shaft.

5. The release paper gluing equipment for adhesive tape production according to claim 4, characterized in that: Also includes: A first mounting block connected to the processing table; A guide rail, arranged at the bottom of the processing table; The first motor is arranged on the first mounting block, the first mounting block is located at one side of the processing table, and a guide block corresponding to the guide rail is arranged on the connecting portion.

6. The release paper gluing equipment for adhesive tape production according to claim 5, characterized in that: Also includes: A mounting plate connected to the piston rod of the first cylinder; A glue storage box, arranged on the mounting plate; The glue coating roller is arranged on the mounting plate, the glue storage box is located above the glue coating roller, a glue outlet is arranged at the bottom of the glue storage box, and a second through groove corresponding to the glue outlet is arranged on the mounting plate.

7. The release paper gluing equipment for adhesive tape production according to claim 6, characterized in that: A reinforcing block is provided on the mounting plate, and the reinforcing block is a triangular structure. A first movable groove is provided on the reinforcing block, and a cleaning plate and a first electromagnet are provided in the first movable groove. A connecting spring is provided on the cleaning plate, and one end of the connecting spring is fixedly connected to the inner wall of the first movable groove. A guide groove is provided on the cleaning plate.

8. The release paper gluing equipment for adhesive tape production according to claim 7, characterized in that: A third through slot is provided on the processing table, and the third through slot is located below the reinforcing block. A connecting block is provided at the bottom of the processing table, and a transfer cavity communicated with the third through slot is provided on the connecting block. A liquid inlet communicated with the transfer cavity is provided on the side wall of the receiving box; a heating block is provided on the connecting block.

9. The release paper gluing equipment for adhesive tape production according to claim 6, characterized in that: A liquid outlet is provided at the bottom of the material receiving box, a push rod is passed through the liquid outlet, a sealing plate is provided at the top of the push rod, the cross-section of the push rod is smaller than the cross-section of the liquid outlet, a guide rod is provided in the liquid outlet, a second movable groove is provided on the push rod, and the guide rod is passed through the second movable groove; a push plate is provided on the inner wall of the glue storage box.

10. The release paper gluing equipment for adhesive tape production according to claim 9, characterized in that: A support plate is provided on the side wall of the glue storage box, a groove corresponding to the support plate is provided on the guide block, and a cover plate is provided on the top of the material receiving box.

Citation Information

Patent Citations

  • Glue uniform coating device for adhesive tape production

    CN214864799U