PET (Polyethylene Terephthalate) composite film coating machine for lithium battery packaging

Abstract

The utility model discloses a PET (Polyethylene Terephthalate) composite film coating machine for packaging a lithium battery. The PET composite film coating machine comprises a bracket, the coating roller is horizontally and rotatably arranged on the bracket; the pressing roller is parallel to the coating roller and is arranged in a sliding manner in the radial direction of the coating roller; the glue tank is installed under the coating roller, and the bottom of the coating roller is located in the glue tank; the plurality of elastic glue scraping plates are arranged at the opening of the glue tank, the front ends of the elastic glue scraping plates are attached to the peripheral surface of the coating roller, and the glue scraping plates are arranged in the axial direction of the coating roller. The glue scraping plate is used for scraping redundant glue on the coating roller, so that the adhesion of the glue on the coating roller is reduced, the loss caused by drying and curing of the glue is reduced, and the production cost of the coating machine is reduced; and by arranging different numbers of glue scraping plates, the range of scraping the glue on the coating roller can be controlled, so that the coating machine is suitable for production of composite films with different widths, and the practicability of the coating machine is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of coating machine especially relates to a PET composite film coating machine for lithium battery package. BACKGROUND

[0002] PET composite film has high strength anti-puncture, chemical stability, good barrier property, good insulation, easy processing and forming and environmental protection and many other advantages, can be applicable to the packaging of lithium battery.

[0003] The existing PET composite film production usually uses double roll coater to carry out glue coating, and the double roll coator is composed of upper and lower glue rollers and glue tank, the lower glue roller is immersed in the glue tank, and the raw material passes through the middle of the two glue rollers, and the glue on the roller is coated on the surface of the raw material by contacting the glue roller.

[0004] But the lower glue roller rotates when the above-mentioned double roll coater is used, and the glue adheres to the surface of the whole lower glue roller, the width of the glue adhesion cannot be controlled according to the width of the raw material, the glue is easily dried and solidified in the part of the lower glue roller not in contact with the raw material, resulting in glue loss, and as the solidified glue increases, resistance to the rotation of the lower glue roller is also generated, affecting the normal operation of the equipment.

[0005] Therefore, it is necessary to improve the coating machine in the prior art. UTILITY MODEL CONTENTS

[0006] The utility model aims at overcoming the defects in the prior art, and provides a PET composite film coating machine for lithium battery package, which reduces the production cost of the coating machine.

[0007] To achieve the above-mentioned purpose, the specific technical scheme of the PET composite film coating machine for lithium battery package of the utility model is as follows:

[0008] A PET composite film coating machine for lithium battery package, comprising:

[0009] A support;

[0010] A coating roller is horizontally rotatably arranged on the support;

[0011] A compression roller is arranged along the radial direction of the coating roller and is parallel to the coating roller;

[0012] A glue tank is installed below the coating roller, and the bottom of the coating roller is located in the glue tank;

[0013] A plurality of elastic glue scraping plates are arranged at the opening of the glue tank, the front end of each glue scraping plate is attached to the outer surface of the coating roller, and the glue scraping plates are arranged along the axial direction of the coating roller.

[0014] Preferably, a flange is circumferentially arranged at the opening of the glue tank, and the glue scraping plate is detachably connected with the flange through a fixing member.

[0015] Preferably, the fixing member has a slot into which the flange is inserted, and a locking screw is threadedly connected to the sidewall of the slot.

[0016] Preferably, the fixing member is fixedly connected with a plug-in rod, and the glue scraping plate is provided with a plug-in hole which is in plug-in cooperation with the plug-in rod.

[0017] Preferably, the bottom of the glue scraping plate is provided with a glue blocking strip.

[0018] Preferably, two of the glue scraping plates are provided with extension portions which are distributed perpendicularly to the axial direction of the coating roller and are in abutment with the end surface of the coating roller.

[0019] Preferably, the two ends of the pressing roller are rotatably connected with lifting seats, the support is vertically provided with a sliding groove, the lifting seats are in sliding cooperation with the sliding groove, and the support is further provided with a pneumatic cylinder which is in transmission connection with the lifting seats.

[0020] Preferably, the glue tank is further connected with a circulating mechanism.

[0021] Preferably, the circulating mechanism comprises a glue storage tank, the bottom of the glue storage tank is in communication with the bottom of the glue tank through a glue inlet pipe, a power pump is arranged on the glue inlet pipe, one end of a reflux pipe is connected with the sidewall of the glue tank, and the other end of the reflux pipe is in communication with the glue storage tank.

[0022] The PET composite film coating machine for lithium battery packaging has the following advantages: the glue scraping plates are arranged for scraping off the excess glue on the coating roller, thereby reducing the adhesion of the glue on the coating roller and reducing the loss caused by the drying and solidification of the glue, so as to reduce the production cost of the coating machine; by arranging different numbers of glue scraping plates, the range of the scraped glue on the coating roller can be controlled, so that the coating machine is applicable to the production of composite films with different widths, and the practicability of the coating machine is improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 FIG. 1 is a structural schematic view of the coating machine of the present application;

[0024] Figure 2 FIG. 3 is an enlarged view of A of FIG. 2; Figure 1

[0025] Figure 3 FIG. 6 is an installation structural schematic view of the pressing roller and the coating roller of the present application;

[0026] Figure 4 FIG. 8 is a structural schematic view of the glue tank of the present application; ​

[0027] Figure 5 This is a schematic diagram of the connection structure between the scraper and the fixing component of this utility model;

[0028] Figure 6 This is a schematic diagram of the connection structure between the scraper and the extension of this utility model.

[0029] The markings in the diagram are as follows: 1. Bracket; 2. Pressure roller; 3. Coating roller; 4. Glue tank; 5. Squeegee; 6. Circulation mechanism; 7. Fixing component; 101. Slide groove; 201. Lifting seat; 202. Cylinder; 301. Motor; 401. Flange; 501. Glue-blocking strip; 502. Insertion hole; 503. Extension; 601. Glue storage tank; 602. Return pipe; 603. Power pump; 604. Glue inlet pipe; 701. Insertion rod; 702. Locking screw; 703. Slot. Detailed Implementation

[0030] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0031] The terms "top surface," "bottom surface," and "full surface" are used with reference to the normal operating state of the coating machine and are only for the convenience of describing this utility model and simplifying the description. They are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] like Figure 1 As shown, a PET composite film coating machine for lithium battery packaging includes a support 1; a coating roller 3, which is horizontally rotatably mounted on the support 1; a pressure roller 2, which is parallel to the coating roller 3 and slides along the radial direction of the coating roller 3; an adhesive tank 4, which is installed directly below the coating roller 3, with the bottom of the coating roller 3 located inside the adhesive tank 4; and multiple elastic scrapers 5, which are provided at the opening of the adhesive tank 4, with their front ends in contact with the outer peripheral surface of the coating roller 3, and each scraper 5 arranged along the axial direction of the coating roller 3.

[0033] This coating machine is suitable for, but not limited to, adhesive coating of PET composite films. During operation, adhesive is poured into the adhesive tank 4. The speed of the PET composite film is synchronized with the rotation speeds of the pressure roller 2 and the coating roller 3. As the PET composite film passes between the two rollers, the pressure roller 2 presses it firmly onto the coating roller 3. The coating roller 3 rotates, carrying the adhesive from the adhesive tank 4 and evenly coating it onto the PET composite film. The scraper 5 is made of rubber with a polytetrafluoroethylene coating on its surface. This coating reduces adhesive adhesion to the scraper 5. This also reduces the friction between the scraper 5 and the coating roller 3, and reduces the resistance to the rotation of the coating roller 3. The installation position of each scraper 5 on the glue tank 4 can be freely adjusted along the axial direction of the coating roller 3. After multiple scrapers 5 are combined, the glue on the coating roller 3 that exceeds the coating width of the PET composite film in the radial direction can be scraped off, so that the glue flows back into the glue tank 4. This reduces the amount of glue adhering between the coating range of the coating roller 3 and the pressure roller 2, reduces glue loss, and lowers the production cost of the coating machine.

[0034] Further improvements include, for example Figure 2 and 5 As shown, a flange 401 is provided circumferentially at the opening of the glue tank 4, and the glue scraper 5 is detachably connected to the flange 401 by a fixing member 7; the fixing member 7 has a slot 703 into which the flange 401 can enter, and a locking screw 702 is threadedly connected to the side wall of the slot 703. The fixing member 7 has a U-shaped structure. After the fixing member 7 is installed on the flange 401, the two can be fixed together by the locking screw 702 to prevent the fixing member 7 from falling off. The scraper 5 is connected to the fixing member 7, so that the scraper 5 is fixed on the glue tank 4 by the fixing member 7. When the scraper 5 is in use, its front end is in contact with the outer peripheral surface of the coating roller 3, so that the scraper 5 can scrape off the excess glue on the coating roller 3, reducing glue loss. Since there are multiple scrapers 5, by increasing or decreasing the number and installation position of the scrapers 5, the range of glue scraped off the coating roller 3 by the scraper 5 can be controlled, so that the coating machine can be used for the production of PET composite films of different sizes, improving the practicality of the coating machine.

[0035] Further improvements include, for example Figure 5 As shown, the fixing member 7 is fixedly connected to the insertion rod 701, and the scraper plate 5 has an insertion hole 502 that engages with the insertion rod 701. The insertion rod 701 engages with the insertion hole 502, which allows for the disassembly of the fixing member 7 and the scraper plate 5. This makes it easy to replace the scraper plate 5 after it is severely worn, improving the convenience of equipment maintenance. Furthermore, the insertion rod 701 extends into the interior of the scraper plate 5, providing internal support for the silicone scraper plate 5. This allows the scraper plate 5 to better abut against and adhere to the surface of the coating roller 3, improving the scraping effect on excess glue on the coating roller 3.

[0036] Further improvements include, for example Figure 6 As shown, a glue-blocking strip 501 is provided at the bottom of the scraper 5. In fact, the glue-blocking strip 501 is distributed along the axial direction of the coating roller 3. When the scraper 5 is in use, the contact part between the coating roller 3 and the scraper 5 moves from bottom to top. That is, the glue scraped off by the scraper 5 on the coating roller 3 is located at the bottom of the scraper 5 and will flow back along the scraper 5 into the glue tank 4. The glue-blocking strip 501 can block the flow of glue and prevent glue from flowing along the scraper 5 towards the edge of the opening of the glue tank 4 to the outside of the glue tank 4, thereby further reducing glue loss.

[0037] Further improvements include, for example Figure 6 As shown, two of the scraper blades 5 are provided with extensions 503. The extensions 503 are distributed perpendicular to the axial direction of the coating roller 3 and are in contact with the end face of the coating roller 3. Since the bottom of the coating roller 3 is immersed in the glue, glue will also adhere to the end face of the coating roller 3. The two scraper blades 5 with extensions 503 are located at the end of the coating roller 3 so that the extensions 503 are in contact with the end face of the coating roller 3. Thus, the glue on the end face of the coating roller 3 is scraped off by the extensions 503 and the glue flows back into the glue tank 4, thereby further reducing glue loss and lowering the production cost of the coating machine.

[0038] Further improvements include, for example Figure 3 As shown, both ends of the pressure roller 2 are rotatably connected to lifting seats 201. The bracket 1 has a vertically oriented sliding groove 101, and the lifting seat 201 slides in conjunction with the sliding groove 101. The bracket 1 is also equipped with a cylinder 202 that is drively connected to the lifting seat 201. The pressure roller 2 is connected to the lifting seat 201 through bearings, and the cylinder 202 drives the lifting seat 201 to rise and fall, thereby controlling the rise and fall of the pressure roller 2. Ultimately, this achieves the adjustment of the gap between the pressure roller 2 and the coating roller 3, improving the coating effect on the PET composite film.

[0039] Further improvements include, for example Figure 4As shown, the glue tank 4 is also connected to a circulation mechanism 6; the circulation mechanism 6 includes a glue storage tank 601, the bottom of which is connected to the bottom of the glue tank 4 via a glue inlet pipe 604, a power pump 603 is installed on the glue inlet pipe 604, one end of a return pipe 602 is connected to the side wall of the glue tank 4, and the other end of the return pipe 602 is connected to the glue storage tank 601. The glue storage tank 601 stores a large amount of glue. The power pump 603 delivers the glue directly to the bottom of the glue tank 4 through the glue inlet pipe 604. As the liquid level in the glue tank 4 rises, excess glue flows back to the glue storage tank 601 through the return pipe 602. This achieves the circulation of glue between the glue storage tank 601 and the glue tank 4, mixing and stirring the glue, reducing the probability of glue sedimentation and stratification, and improving the coating effect of the coating machine on the PET composite film. Furthermore, by continuously injecting glue into the glue tank 4, the glue level inside the glue tank 4 can be kept stable, allowing the glue to fully contact the coating roller 3, thereby making the glue evenly distributed on the coating roller 3 and ultimately improving the coating effect on the PET composite film.

[0040] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A PET composite film coating machine for lithium battery packaging, characterized in that, include: Support (1); The coating roller (3) is horizontally rotatably mounted on the support (1); The pressing roller (2) is parallel to the coating roller (3) and is slidably arranged along the radial direction of the coating roller (3); The glue tank (4) is installed directly below the coating roller (3), with the bottom of the coating roller (3) located inside the glue tank (4); Multiple elastic scrapers (5) are provided at the opening of the glue tank (4), and their front ends are attached to the outer peripheral surface of the coating roller (3). Each scraper (5) is arranged along the axial direction of the coating roller (3).

2. The PET composite film coating machine for lithium battery packaging according to claim 1, characterized in that, The glue tank (4) has a flange (401) circumferentially provided at the opening, and the glue scraper (5) is detachably connected to the flange (401) by a fastener (7).

3. The PET composite film coating machine for lithium battery packaging according to claim 2, characterized in that, The fastener (7) has a slot (703) into which the flange (401) enters, and the sidewall of the slot (703) is threaded with a locking screw (702).

4. The PET composite film coating machine for lithium battery packaging according to claim 2 or 3, characterized in that, The fastener (7) is fixedly connected to a plug rod (701), and the scraper (5) has a plug hole (502) that is engaged with the plug rod (701).

5. The PET composite film coating machine for lithium battery packaging according to claim 4, characterized in that, The bottom of the scraper (5) is provided with a glue-blocking strip (501).

6. The PET composite film coating machine for lithium battery packaging according to claim 1, characterized in that, Two of the scraper blades (5) are provided with extensions (503), which are distributed perpendicular to the axial direction of the coating roller (3) and are in contact with the end face of the coating roller (3).

7. The PET composite film coating machine for lithium battery packaging according to claim 1, characterized in that, Both ends of the pressing roller (2) are rotatably connected to lifting seats (201). The bracket (1) is vertically provided with a sliding groove (101). The lifting seat (201) is slidably engaged with the sliding groove (101). The bracket (1) is also provided with a cylinder (202) that is throttle-connected to the lifting seat (201).

8. The PET composite film coating machine for lithium battery packaging according to claim 1, characterized in that, The glue tank (4) is also connected to a circulation mechanism (6).

9. The PET composite film coating machine for lithium battery packaging according to claim 8, characterized in that, The circulation mechanism (6) includes a glue storage tank (601), the bottom of which is connected to the bottom of the glue tank (4) via a glue inlet pipe (604). A power pump (603) is installed on the glue inlet pipe (604). One end of a return pipe (602) is connected to the side wall of the glue tank (4), and the other end of the return pipe (602) is connected to the glue storage tank (601).

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