A laminated board film coating device

Abstract

The application discloses a laminated board film wrapping device, which comprises a seat body, a positioning clamp arranged on the seat body and used for placing laminated boards, a winding-off mechanism movably arranged on the seat body and used for releasing a wrapping film, and a rotating mechanism arranged on the seat body and connected with the winding-off mechanism and used for driving the winding-off mechanism to rotate around the winding space to wind the wrapping film on the outer periphery of the laminated boards. In use, a plurality of boards are first laminated in the positioning clamp, the end of the wrapping film is clamped between two adjacent boards or between the bottom board and the positioning clamp, the rotating mechanism drives the winding-off mechanism to rotate around the winding space, and in the rotating process of the rotating mechanism, the winding-off mechanism releases the wrapping film to automatically wind the wrapping film on the outer periphery of the laminated boards, so that the wrapping efficiency is high, the laminated boards are neat, the tightness of the wrapping film is stable, and the boards are convenient to store and transport.

Description

Technical Field

[0001] This invention relates to the field of packaging equipment technology, and in particular to a laminated sheet wrapping device. Background Technology

[0002] In some packaging production processes, it is often necessary to wrap multiple stacked boards together with packaging film to facilitate storage or transportation. Currently, the packaging film is typically wrapped manually multiple times around the perimeter of the boards to form a wrapping structure. This manual wrapping is inefficient, results in poor stacking neatness, and uneven wrapping tightness, making it easy for the boards to come loose. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a laminated board wrapping device, which can automatically wrap a packaging film around the outer periphery of multiple stacked boards, resulting in high packaging efficiency, high neatness of the stacked boards, and stable tightness of the wrapping film, which is beneficial for the storage and transportation of the boards.

[0004] According to an embodiment of the present invention, a laminated sheet material wrapping device includes: a base; a positioning clamp disposed on the base for placing the laminated sheet material and having a winding space between the clamp and the base; an unwinding mechanism movably disposed on the base for releasing the packaging film; and a rotating mechanism disposed on the base and connected to the unwinding mechanism for driving the unwinding mechanism to rotate around the winding space to wrap the packaging film around the outer periphery of the laminated sheet material.

[0005] The laminated plate coating apparatus according to embodiments of the present invention has at least the following beneficial effects:

[0006] In use, multiple boards are first stacked in the positioning fixture. The end of the packaging film on the unwinding mechanism is clamped between two adjacent boards or between the bottom board and the positioning fixture. The unwinding mechanism is driven by the rotating mechanism to rotate through the winding space. During the rotation, the unwinding mechanism releases the packaging film and automatically wraps the packaging film around the outer perimeter of the multiple stacked boards. This stacked board wrapping device has high packaging efficiency, high neatness of stacked boards, and stable tightness of packaging film wrapping, which is beneficial for storing and transporting boards.

[0007] In some embodiments of the present invention, the positioning fixture includes a first frame and a second frame spaced apart from the base. The upper part of the first frame and the second frame is provided with a support member. The support member has a placement plane and a first positioning side. The support member is movably provided with a clamping member. The clamping member has a second positioning side opposite to the first positioning side and can move closer to or away from the first positioning side.

[0008] In some embodiments of the present invention, the rotating mechanism includes a rotating wheel rotatably disposed on the base and a driving device for driving the rotating wheel to rotate. The unwinding mechanism is disposed on the side wall of the rotating wheel. A clearance channel is provided in the middle of the rotating wheel. The first upright and the second upright are respectively located on both sides of the rotating wheel so that the plate placed between the two supports passes through the clearance channel.

[0009] In some embodiments of the present invention, the wheel is annular, and the base is provided with an annular member that matches the inner peripheral wall of the wheel. The central space of the annular member forms a clearance channel. The driving device includes a driven tooth disposed on the outer periphery of the wheel, a motor disposed on the base, and a driving gear disposed on the output shaft of the motor and meshing with the driven tooth.

[0010] In some embodiments of the present invention, the unwinding mechanism includes an unwinding shaft disposed on the side wall of the rotating wheel, the unwinding shaft being located on one side of the positioning fixture, the rotating wheel being rotatably provided with a first swing arm, one end of the first swing arm being provided with a pressure roller, and the other end of the first swing arm being connected to a first elastic member that drives the pressure roller to move closer to the unwinding shaft.

[0011] In some embodiments of the present invention, a connecting arm is rotatably provided on the side wall of the rotating wheel, an unwinding shaft is provided at one end of the connecting arm, and a first driving mechanism is connected to the other end of the connecting arm, which can drive the unwinding shaft away from the positioning fixture. The base is provided with a cutting assembly that can be moved between the unwinding shaft and the positioning fixture to cut the packaging film.

[0012] In some embodiments of the present invention, the cutting assembly includes a second swing arm rotatably mounted on a base. The free end of the second swing arm is provided with a strip plate parallel to the unwinding shaft. Two heating elements are spaced apart along the length of the strip plate. A heating wire extending along the length of the strip plate is connected between the two heating elements. A second linear actuator is rotatably mounted on the base. The extended end of the second linear actuator is rotatably connected to the second swing arm to drive the heating wire to approach or move away from the packaging film located between the sheet material and the unwinding shaft.

[0013] In some embodiments of the present invention, a positioning post protrudes from the side wall of the rotary wheel, and a positioning groove matching the positioning post is provided on the connecting arm. A second elastic element is connected to the end of the connecting arm away from the unwinding shaft to drive the positioning groove to engage with the positioning post so that the unwinding shaft is close to the positioning fixture. The end of the connecting arm away from the unwinding shaft has a drive rod passing through the clearance channel. The first drive mechanism includes a rotating arm rotatably disposed on the rotary wheel. A first linear actuator is rotatably disposed on the rotary wheel. The extended end of the first linear actuator is rotatably connected to one end of the rotating arm to drive the other end of the rotating arm to push the drive rod, thereby driving the positioning groove to separate from the positioning post so that the unwinding shaft is away from the positioning fixture.

[0014] In some embodiments of the present invention, the base is provided with a pre-top anti-loosening structure that can abut the packaging film against the side of the stacked plates.

[0015] In some embodiments of the present invention, the pre-top anti-loosening structure includes a third swing arm rotatably mounted on the base, the free end of the third swing arm being provided with a long strip pressure plate that can abut against the side wall of the plate, and a third linear actuator rotatably mounted on the base, the extended end of the third linear actuator being rotatably connected to the third swing arm to drive the long strip pressure plate closer to or away from the side wall of the plate.

[0016] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 This is a schematic diagram of an embodiment of the laminated sheet coating device of the present invention, showing the unwinding shaft located on the left side of the sheet.

[0019] Figure 2 for Figure 1 A structural schematic diagram from another perspective of the embodiment;

[0020] Figure 3 for Figure 1 A schematic diagram of the structure in the embodiment where the unwinding shaft is located above the sheet metal;

[0021] Figure 4 for Figure 1 A schematic diagram of the structure in the embodiment where the unwinding shaft is located below the sheet metal;

[0022] Figure 5 for Figure 1 A schematic diagram of the laminated board wrapping device in the embodiment, showing the state of cutting the packaging film. Detailed Implementation

[0023] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0024] In the description of this invention, it should be understood that the orientation descriptions, such as the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer", indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0025] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0026] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0027] See Figures 1 to 5 The present invention provides a laminated sheet material wrapping device, comprising: a base 100; a positioning clamp 200 disposed on the base 100 for placing laminated sheets and having a winding space between the clamp and the base 100; an unwinding mechanism 300 movably disposed on the base 100 for releasing the packaging film; and a rotating mechanism 400 disposed on the base 100 and connected to the unwinding mechanism 300 for driving the unwinding mechanism 300 to rotate around the winding space to wrap the packaging film around the outer periphery of the laminated sheets.

[0028] In use, multiple boards are first stacked in the positioning clamp 200. The positioning clamp 200 helps to improve the neatness of the stacked boards. The end of the packaging film on the unwinding mechanism 300 is clamped between two adjacent boards or between the bottom board and the positioning clamp 200 to pre-fix the free end of the packaging film. The unwinding mechanism 300 is driven by the rotating mechanism 400 to rotate through the winding space. During the movement of the rotating mechanism 400, the unwinding mechanism 300 releases the packaging film and automatically wraps the packaging film around the outer periphery of the multiple stacked boards. This stacked board wrapping device has high packaging efficiency and stable tightness of the wrapping film, which is beneficial for storing and transporting boards.

[0029] See Figure 1 and Figure 2 In some embodiments of the present invention, the positioning clamp 200 includes a first stand 210 and a second stand 220 spaced apart from the base 100. Both the first stand 210 and the second stand 220 have a support member 230 on their upper parts. The support member 230 has a placement plane 231 and a first positioning side 232. A clamping member 240 is movably disposed on the support member 230. The clamping member 240 has a second positioning side 241 opposite to the first positioning side 232 and capable of approaching or moving away from the first positioning side 232. It is understood that when the plate is placed in the positioning clamp 200, the plate at the bottom contacts the placement plane 231, the first positioning side 232 abuts against one side wall of the plate, and the second positioning side 241 abuts against the other side wall of the plate, thereby clamping and limiting the plate. Before placing the sheet material, the clamping member 240 is moved to move the second positioning side 241 away from the first positioning side 232. After the sheet material is placed on the support member 230, the clamping member 240 is moved to move the second positioning side 241 closer to the first positioning side 232, thus restricting the movement of the sheet material. This positioning clamp 200 can adapt to sheets of different widths and has a wide range of applications. In this embodiment, the support member 230 has an insertion hole with its depth direction parallel to the placement plane 231, and the clamping member 240 has a post inserted into the insertion hole, with frictional contact between the post and the insertion hole. Of course, in other embodiments, the clamping member 240 can also be connected to a cylinder to move relative to the support member 230.

[0030] See Figure 1 In some embodiments of the present invention, the rotating mechanism 400 includes a rotating wheel 410 rotatably mounted on the base 100 and a driving device 420 for driving the rotating wheel 410 to rotate. An unwinding mechanism 300 is disposed on the side wall of the rotating wheel 410. A clearance channel 111 is provided in the middle of the rotating wheel 410. A first support 210 and a second support 220 are respectively located on both sides of the rotating wheel 410 so that the sheet material placed between the two support members 230 passes through the clearance channel 111. It is understood that when the driving device 420 drives the rotating wheel 410 to rotate, the sheet material is always located within the clearance channel 111. The unwinding mechanism 300 rotates around the clearance channel 111 to wind the packaging film several times around the outer periphery of the stacked sheet material.

[0031] See Figure 1In some embodiments of the present invention, the rotating wheel 410 is annular, and the base 100 is provided with an annular member 110 that matches the inner peripheral wall of the rotating wheel 410. The central space of the annular member 110 forms a clearance channel 111. The driving device 420 includes a driven gear 423 disposed on the outer periphery of the rotating wheel 410, a motor 421 disposed on the base 100, and a driving gear 422 disposed on the output shaft of the motor 421 and meshing with the driven gear 423. It can be understood that the inner peripheral wall of the rotating wheel 410 rotates around the annular member 110, and the annular member 110 is the axis of rotation of the rotating wheel 410. The central space of the annular member 110 forms a clearance channel 111, which simplifies the structure of the laminated sheet coating device. The structure of rotating the motor 421 and driving the driven gear 423 to rotate is simple and has fewer parts.

[0032] See Figure 1 In some embodiments of the present invention, the unwinding mechanism 300 includes an unwinding shaft 310 disposed on the side wall of the rotating wheel 410. The unwinding shaft 310 is located on one side of the positioning clamp 200. The rotating wheel 410 is rotatably equipped with a first swing arm 320. One end of the first swing arm 320 is provided with a pressure roller 330, and the other end of the first swing arm 320 is connected to a first elastic member 340 that drives the pressure roller 330 to move closer to the unwinding shaft 310. A roll of packaging film is threaded onto the unwinding shaft 310. Under the action of the first elastic member 340, the pressure roller 330 abuts against the outer peripheral wall of the roll of packaging film. In order to prevent the packaging film from being over-released and to ensure that the packaging film wrapped around the outer periphery of the stacked boards has good tension, the boards are prevented from falling off the wrapped packaging film. In other embodiments, when the unwinding mechanism 300 is not equipped with a pressure roller 330, friction damping can be provided between the unwinding shaft 310 and the inner diameter of the roll of packaging film to avoid over-release of the packaging film.

[0033] See Figure 1 and Figure 2 In some embodiments of the present invention, a connecting arm 350 is rotatably provided on the side wall of the rotating wheel 410, and an unwinding shaft 310 is provided at one end of the connecting arm 350. The other end of the connecting arm 350 is connected to a first driving mechanism 360 capable of driving the unwinding shaft 310 away from the positioning clamp 200. The base 100 is provided with a cutting assembly 500 movable between the unwinding shaft 310 and the positioning clamp 200 to cut the packaging film. In order to realize the function of fully automated film wrapping, the laminated board film wrapping device also includes a controller connected to each driving part. It should be noted that when the number of wrapping film turns reaches a set number, the controller drives the first driving mechanism 360 to work so that the unwinding shaft 310 is away from the positioning clamp 200, and then controls the cutting assembly 500 to move between the unwinding shaft 310 and the positioning clamp 200 to cut the packaging film.

[0034] Additionally, it should be noted that when the board material is rectangular, the width of the packaging film is generally smaller than the length of the board material. The packaging film should be wrapped around the middle of the board material to achieve the best wrapping effect and avoid insufficient pressure between the ends of adjacent boards. If the rotating wheel 410 is a solid structure, the first support 210 and the second support 220 need to be located on the same side of the rotating wheel 410, and the length of the unwinding shaft 310 must also be extended. The entire assembly of the connecting arm 350 and the unwinding shaft 310 can be considered as a cantilever structure mounted on the side wall of the rotating wheel 410. The arrangement of the first support 210 and the second support 220 on opposite sides of the rotating wheel 410 effectively reduces the dimensions of the laminated board wrapping device along the length of the board material, which helps to reduce the length of the unwinding shaft 310, reduce the force at the connection between the connecting arm 350 and the rotating wheel 410, and improve the stability of the unwinding mechanism 300 as it moves with the rotating wheel 410.

[0035] See Figure 1 and Figure 5 In some embodiments of the present invention, the cutting assembly 500 includes a second swing arm 510 rotatably disposed on the base 100. The free end of the second swing arm 510 is provided with a strip plate 520 parallel to the unwinding shaft 310. Two heating elements 530 are spaced apart along the length of the strip plate 520. A heating wire 540 extending along the length of the strip plate 520 is connected between the two heating elements 530. A second linear actuator 550 is rotatably disposed on the base 100. The extended end of the second linear actuator 550 is rotatably connected to the second swing arm 510 to drive the heating wire 540 to approach or move away from the packaging film located between the plate and the unwinding shaft 310. Understandably, when it is necessary to cut the packaging film, the first drive mechanism 360 is first activated to move the unwinding shaft 310 away from the positioning clamp 200. At this time, the length of the packaging film located between the unwinding mechanism 300 and the positioning clamp 200 is relatively large, facilitating the cutting of the packaging film. Then, the extended end of the second linear actuator 550 retracts, thereby driving the second swing arm 510 to swing towards the positioning clamp 200. The heating wire 540 contacts the packaging film and quickly melts and cuts the packaging film. The cut formed by the heating wire 540 contacting the packaging film is smoother, resulting in higher cutting efficiency. Of course, in other embodiments, the cutting component 500 can also use ordinary blades.

[0036] See Figure 1 and Figure 2In some embodiments of the present invention, a positioning post 411 protrudes from the side wall of the rotating wheel 410, and a positioning groove 351 matching the positioning post 411 is provided on the connecting arm 350. A second elastic member is connected to the end of the connecting arm 350 away from the unwinding shaft 310 to drive the positioning groove 351 to engage with the positioning post 411 so that the unwinding shaft 310 is close to the positioning fixture 200. The end of the connecting arm 350 away from the unwinding shaft 310 has a driving rod 352 passing through the clearance channel 111. The first driving mechanism 360 includes a rotating arm 361 rotatably disposed on the rotating wheel 410. A first linear actuator 362 is rotatably disposed on the rotating wheel 410. The extended end of the first linear actuator 362 is rotatably connected to one end of the rotating arm 361 to drive the other end of the rotating arm 361 to push the driving rod 352, thereby driving the positioning groove 351 to separate from the positioning post 411 so that the unwinding shaft 310 is away from the positioning fixture 200. Understandably, under the action of the second elastic element, the positioning pin 411 enters the positioning groove 351, and the angular position of the connecting arm 350 is limited, preventing the unwinding shaft 310 from getting too close to the board material under the action of the second elastic element, which would cause difficulties in winding the packaging film. When it is necessary to cut the packaging film, the extended end of the first linear actuator 362 extends and actuates the drive rod 352, thereby driving the unwinding shaft 310 away from the positioning clamp 200. When the extended end of the first linear actuator 362 retracts, under the action of the second elastic element, the positioning pin 411 enters the positioning groove 351, and the unwinding shaft 310 returns to the position for unwinding the packaging film.

[0037] See Figure 1 and Figure 3 In some embodiments of the present invention, in order to ensure that the packaging film is tightly wrapped around the outer periphery of the board, the base 100 is provided with a pre-top anti-loosening structure 600 that can press the packaging film against the side of the stacked board.

[0038] In some embodiments of the present invention, the pre-top anti-loosening structure 600 includes a third swing arm 610 rotatably mounted on a base 100. The free end of the third swing arm 610 is provided with a long strip pressure plate 620 capable of abutting against the side wall of the plate. A third linear actuator 630 is rotatably mounted on the base 100. The extended end of the third linear actuator 630 is rotatably connected to the third swing arm 610 to drive the long strip pressure plate 620 closer to or further away from the side wall of the plate. It is understood that, see [link to relevant documentation]... Figure 3 When the packaging film roll on the unwinding reel 310 avoids the long strip pressure plate 620, the extended end of the third linear actuator 630 retracts so that the long strip pressure plate 620 presses the packaging film against the side wall of the stacked sheets, preventing the packaging film from loosening. See [link to documentation]. Figure 4As the unwinding shaft 310 rotates with the rotating wheel 410 to a position below the sheet material, the extended end of the third linear actuator 630 extends to move the elongated pressure plate 620 away from the sheet material, allowing the packaging film on the unwinding shaft 310 to complete one revolution, thus avoiding interference. Repeating this operation ensures that each turn of the packaging film is pressed against the side wall of the stacked sheet material by the elongated pressure plate 620, ensuring the tension of the wound packaging film.

[0039] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0040] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A laminated sheet coating device, characterized in that, include: base(100); A positioning fixture (200) is provided on the base (100) for placing stacked plates and has a winding space between it and the base (100); An unwinding mechanism (300), movably mounted on the seat (100), is used to release the packaging film; A rotating mechanism (400) is provided on the base (100) and connected to the unwinding mechanism (300), used to drive the unwinding mechanism (300) to rotate around the winding space to wrap the packaging film around the outer periphery of the stacked plates; The rotating mechanism (400) includes a rotating wheel (410) rotatably mounted on the base (100) and a driving device (420) for driving the rotating wheel (410) to rotate. The unwinding mechanism (300) is located on the side wall of the rotating wheel (410), and the rotating wheel (410) has a clearance channel (111) in the middle. The unwinding mechanism (300) includes an unwinding shaft (310) located on the side wall of the rotating wheel (410), and the unwinding shaft (310) is located on one side of the positioning clamp (200). The base (100) is provided with a pre-top anti-loosening structure (600) that can abut the packaging film against the side of the stacked boards. The pre-top anti-loosening structure (600) includes a third swing arm (610) rotatably mounted on the base (100), and the free end of the third swing arm (610) is provided with a clearance channel (111). A long strip pressure plate (620) abuts against the side wall of the board. A third linear actuator (630) is rotatably mounted on the base (100). The extended end of the third linear actuator (630) is rotatably connected to the third swing arm (610) to drive the long strip pressure plate (620) to approach or move away from the side wall of the board. When the packaging film roll on the unwinding shaft (310) avoids the long strip pressure plate (620), the extended end of the third linear actuator (630) retracts so that the long strip pressure plate (620) presses the packaging film against the side wall of the stacked board to prevent the packaging film from loosening. When the unwinding shaft (310) rotates with the rotating wheel (410) to the bottom of the board, the extended end of the third linear actuator (630) extends so that the long strip pressure plate (620) moves away from the board so that the packaging film on the unwinding shaft (310) completes one revolution.

2. A laminated plate coating device according to claim 1, characterized in that: The positioning clamp (200) includes a first stand (210) and a second stand (220) spaced apart from the base (100). The upper part of the first stand (210) and the second stand (220) is provided with a support member (230). The support member (230) has a placement plane (231) and a first positioning side (232). The support member (230) is movably provided with a clamping member (240). The clamping member (240) has a second positioning side (241) opposite to the first positioning side (232) and can move closer to or away from the first positioning side (232).

3. A laminated plate coating device according to claim 2, characterized in that: The first upright (210) and the second upright (220) are located on both sides of the turntable (410) so that the plate placed between the two supports (230) passes through the clearance channel (111).

4. A laminated plate coating device according to claim 3, characterized in that: The rotating wheel (410) is annular, and the base (100) is provided with an annular component (110) that matches the inner circumferential wall of the rotating wheel (410). The central space of the annular component (110) forms the clearance channel (111). The driving device (420) includes a driven gear (423) disposed on the outer circumference of the rotating wheel (410), a motor (421) disposed on the base (100), and a driving gear (422) disposed on the output shaft of the motor (421) and meshing with the driven gear (423).

5. A laminated plate coating device according to claim 3, characterized in that: The rotating wheel (410) is rotatably provided with a first swing arm (320), one end of the first swing arm (320) is provided with a pressure roller (330), and the other end of the first swing arm (320) is connected to a first elastic element (340) that drives the pressure roller (330) to move closer to the unwinding shaft (310).

6. A laminated plate coating device according to claim 5, characterized in that: The side wall of the rotating wheel (410) is rotatably provided with a connecting arm (350), the unwinding shaft (310) is located at one end of the connecting arm (350), and the other end of the connecting arm (350) is connected to a first driving mechanism (360) capable of driving the unwinding shaft (310) away from the positioning clamp (200). The base (100) is provided with a cutting assembly (500) movable between the unwinding shaft (310) and the positioning clamp (200) to cut the packaging film.

7. A laminated plate coating device according to claim 6, characterized in that: The cutting assembly (500) includes a second swing arm (510) rotatably mounted on the base (100). The free end of the second swing arm (510) is provided with a strip plate (520) parallel to the unwinding shaft (310). The strip plate (520) is provided with two heating elements (530) spaced apart along its length. A heating wire (540) extending along the length of the strip plate (520) is connected between the two heating elements (530). A second linear actuator (550) is rotatably mounted on the base (100). The extended end of the second linear actuator (550) is rotatably connected to the second swing arm (510) to drive the heating wire (540) to move closer to or away from the packaging film located between the plate and the unwinding shaft (310).

8. A laminated plate coating device according to claim 6, characterized in that: The side wall of the roller (410) is provided with a positioning post (411), and the connecting arm (350) is provided with a positioning groove (351) that matches the positioning post (411). The end of the connecting arm (350) away from the unwinding shaft (310) is connected to a second elastic member that drives the positioning groove (351) to engage with the positioning post (411) so that the unwinding shaft (310) is close to the positioning clamp (200). The end of the connecting arm (350) away from the unwinding shaft (310) has a drive that passes through the clearance channel (111). The first drive mechanism (360) includes a rotating arm (361) rotatably mounted on the rotating wheel (410). The rotating wheel (410) is rotatably mounted with a first linear actuator (362). The extended end of the first linear actuator (362) is rotatably connected to one end of the rotating arm (361) to drive the other end of the rotating arm (361) to push the drive rod (352), thereby driving the positioning groove (351) to separate from the positioning post (411) so that the unwinding shaft (310) moves away from the positioning fixture (200).

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