An embossing device and processing method for paper-plastic composite bags

Abstract

This application discloses an embossing device for paper-plastic composite bags, belonging to the technical field of packaging bag processing equipment. The key technical features include: a frame with a first unwinding roller, a second unwinding roller, and several guide rollers; an embossing device including an embossing base, an upper embossing plate, and a lower embossing plate; a negative pressure mechanism placed on the lower embossing plate; an adhesive applicator for adding adhesive, the adhesive applicator being mounted on the embossing base; a pressing roller mounted on the embossing base; and a side-blocking structure for preventing adhesive from flowing out from the sides, the side-blocking structure being mounted on both sides of the pressing roller; wherein the embossing device is equipped with a first conveyor belt and a second conveyor belt. This application provides an embossing device for paper-plastic composite bags, enabling the paper-plastic composite bags to be embossed before bonding, ensuring that the PET film with an aluminum-coated layer is not deformed during embossing.

Description

Technical Field

[0001] This application belongs to the technical field of packaging bag processing equipment, and particularly relates to an embossing device for paper-plastic composite bags and its processing method. Background Technology

[0002] Paper-plastic composite bags are a type of packaging product that combines the advantages of various packaging methods. They are low in cost, have exquisite printing, and feature anti-static, UV protection, moisture protection, oxygen barrier, light blocking, cold resistance, oil resistance, high temperature resistance, and freshness preservation properties. They are widely used in daily life.

[0003] A Chinese patent with publication number CN104139567A discloses a scratch-resistant vacuum heat-insulating aluminum-plastic film packaging bag. The bag is characterized in that, from the inside out, the scratch-resistant vacuum heat-insulating aluminum-plastic film packaging bag is provided with a PE film (1), an aluminum foil (2), an aluminized PET film (3), and a nylon film (4). A scratch-resistant coating (5) is coated on the nylon film (4). An adhesive polyurethane layer is coated between the PE film (1) and the aluminum foil (2), between the aluminum foil (2) and the aluminized PET film (3), and between the aluminized PET film (3) and the nylon film (4).

[0004] Paper-plastic composite packaging bags are essential daily necessities. During the production process, the packaging bags are usually embossed to form the required patterns. Paper-plastic composite packaging bags consist of a paper composite layer and a PET composite film with an aluminum-coated layer. However, embossing existing paper-plastic composite packaging bags will damage the aluminum-coated layer of the PET film, which needs to be improved. Summary of the Invention

[0005] The purpose of this application is to address the aforementioned technical problems by providing an embossing device for paper-plastic composite bags, which enables the paper-plastic composite bags to be embossed before bonding, ensuring that the PET film with the aluminum coating layer is not deformed during embossing.

[0006] This application provides an embossing apparatus for paper-plastic composite bags, comprising:

[0007] The frame is equipped with a first unwinding roll, a second unwinding roll, and several guide rolls;

[0008] An impression apparatus, comprising an impression base, an upper impression plate, and a lower impression plate;

[0009] The negative pressure mechanism is placed on the lower printing plate;

[0010] An adhesive applicator for adding adhesive, the adhesive applicator being mounted on an impression base;

[0011] The pressing roller is mounted on the impression base;

[0012] A side guard structure is provided to prevent glue from flowing out from the side, and the side guard structure is installed on both sides of the pressing roller;

[0013] The printing device is equipped with a first conveyor belt, which is mounted on the printing base. The lower printing plate is mounted on the first conveyor belt. The printing device is also equipped with a second conveyor belt, which is mounted on the frame. The upper printing plate is mounted on the second conveyor belt.

[0014] A paper composite layer, formed by bonding a paper layer and a PE film, is placed on the first unwind roll. A PET composite film with an aluminum-coated layer is placed on the second unwind roll. Guide rollers guide the two composite materials, and an imprinting device imprints the paper composite layer. The paper composite layer is shaped by the extrusion action of an upper and lower imprinting plate. A negative pressure device maintains a static relationship between the paper composite layer and the lower imprinting plate. After imprinting, an adhesive coating device applies glue to the paper composite layer. The PET composite film is then placed on the paper composite layer by the guide rollers. The paper composite layer and the PET composite film are then pressed and bonded together by pressing rollers. The edge-blocking structure prevents the glue from being squeezed out from both sides of the composite layer, allowing the glue to fill the imprinting cavity, thereby improving the structural strength of the imprinting structure of the paper composite layer and ensuring the connection stability between the paper composite layer and the PET composite film. The lower imprinting plate is moved by the first conveyor belt, and the upper imprinting plate is moved by the second conveyor belt. The moving speed of the first and second conveyor belts is controlled to match the moving speed of the paper composite layer and the PET composite film.

[0015] Furthermore, the lower imprint plate is provided with a concave die, the upper imprint plate is provided with a convex die, and the negative pressure mechanism includes:

[0016] The first negative pressure port is placed on the lower pressure plate;

[0017] The second negative pressure port is placed on the die cavity;

[0018] The air pressure sensor is connected to the second negative pressure port.

[0019] The embossing on the paper composite layer is formed by the action of a concave die and a convex die. When the paper composite layer is placed on the lower embossing plate, the first negative pressure port is used to fix the paper composite layer. After the embossing is completed, air is drawn out of the concave die through the second negative pressure port to maintain the embossed shape of the paper composite layer, which facilitates the demolding of the convex die and the subsequent filling of glue into the embossing. The formed embossing is monitored by an air pressure sensor. If there is a large fluctuation in air pressure, it indicates that the paper composite layer is damaged during the embossing process, and an alarm inspection is required.

[0020] Furthermore, the frame is provided with a cam seat, and a spring is provided between the punch and the upper imprinting plate, and the punch is adapted to the cam seat.

[0021] The punch is movably connected to the upper and lower stamping plates. When the upper and lower stamping plates are pressed together, the punch moves towards the die through the cam seat, thus achieving stamping. The punch moves with the upper stamping plate. When the punch separates from the cam seat, the punch is reset by the action of the spring, which facilitates the separation of the upper and lower stamping plates.

[0022] Furthermore, the adhesive application device includes:

[0023] Mounting bracket, installed on the impression base;

[0024] The first slide rail is placed on the mounting bracket;

[0025] The first slider is adapted to the first slide rail;

[0026] The first lead screw is mounted on the mounting bracket, and the first slider is adapted to the first lead screw;

[0027] The first drive motor is used to drive the first slider to move;

[0028] A scanning device is used to scan the imprint position, and the scanning device is mounted on the first slider.

[0029] The paper composite layer passes under the mounting frame. The first drive motor drives the first lead screw to rotate, causing the first slider to move along the first slide rail. Glue is sprayed from the first slider. The first slider moves on the first slide rail and applies the glue to the paper composite layer in a wave-like pattern. While the first slide rail is applying the glue, a scanning device scans the paper composite layer and records the deeper positions after the embossing is completed.

[0030] Furthermore, the adhesive application device also includes:

[0031] The second slide rail is placed on the mounting bracket;

[0032] The second slider is adapted to the second slide rail;

[0033] The second lead screw is mounted on the mounting bracket, and the second slider is adapted to the second lead screw;

[0034] The second drive motor is used to drive the second slider to move.

[0035] After analyzing and calculating the imprint position obtained by scanning with a scanning device, the second screw is rotated by the second drive motor to move the second slider. The second slider moves above the imprint position to replenish the glue filling at the imprint position.

[0036] Furthermore, the retaining structure includes:

[0037] The pressure plate is installed on the impression base;

[0038] Rollers are mounted on the pressure plate;

[0039] The pressing belt connects the roller and the pressing roller.

[0040] The pressure plate is installed on both sides of the pressing roller. The starting end of the pressure plate is further forward than the pressing roller. The edge pressing belt is installed between the pressure plate and the pressing roller through rollers. The edge pressing belt acts on both sides of the paper composite layer and the PET composite film to prevent glue from flowing out from both sides and to drive the glue through the paper composite layer so that the imprinted position is filled with glue.

[0041] Furthermore, the retaining structure also includes:

[0042] The first inclined roller, of which there are several, is installed on the pressure plate;

[0043] The second inclined roller is provided in several units and installed on the pressure plate;

[0044] The axis of the first inclined roller and the axis of the second inclined roller form an acute angle.

[0045] The first inclined roller controls the glue entering the edge-blocking structure area to be guided towards the center, and the second inclined roller controls the glue driven by the pressing roller to be guided towards the center, reducing the accumulation of glue on the side and ensuring the filling of glue at the imprinting position.

[0046] This application also provides a processing method for an embossing device for paper-plastic composite bags, the specific steps of which include:

[0047] S1, prepare the paper composite layer to be placed on the first unwinding roll, and prepare the aluminized PET composite film to be placed on the second unwinding roll;

[0048] S2, after the first unwinding roller unwinds, it is guided into the imprinting device by the guide roller. By controlling the moving speed of the first conveyor belt and the second conveyor belt to be the same as the moving speed of the paper composite layer, when the paper composite layer moves to the lower imprinting plate, the first negative pressure port is opened. The upper imprinting plate and the lower imprinting plate press the paper composite layer together. When the punch moves to the point of contact with the cam seat, the paper composite layer is imprinted. Then the second negative pressure port is activated. After the imprinting is completed, the punch and the die are separated, and then the upper imprinting plate and the lower imprinting plate are separated.

[0049] S3, the paper composite layer is coated with glue by the glue coating device, and then the PET composite film is unwound and guided by the guide roller to correspond with the paper composite layer, and then pressed by the pressing roller.

[0050] The paper composite layer is first imprinted to form the required shape, and then the PET composite film is glued to the paper composite layer. This allows the imprinted position to maintain a good shape, and the PET composite film does not participate in the imprinting deformation, so that the aluminum coating layer on the PET composite film is not damaged.

[0051] The beneficial effects of this application are:

[0052] 1. The paper composite layer is imprinted by an imprinting device. After imprinting, glue is applied to the paper composite layer by an adhesive coating device. The PET composite film is placed on the paper composite layer by a guide roller. Then, the paper composite layer and the PET composite film are pressed and bonded by a pressing roller.

[0053] 2. The embossing on the paper composite layer is formed by the action of the concave and convex molds. When the paper composite layer is placed on the lower embossing plate, the first negative pressure port is used to fix the paper composite layer. After the embossing is completed, the second negative pressure port is used to draw air in the concave mold to maintain the embossed shape of the paper composite layer, which facilitates the demolding of the convex mold and facilitates the subsequent filling of glue into the embossing.

[0054] 3. The first drive motor drives the first lead screw to rotate, causing the first slider to move along the first slide rail. The first slider moves on the first slide rail to apply glue in a wave-like pattern onto the paper composite layer. After the imprint position is obtained by scanning by the scanning device and analyzed and calculated, the second drive motor controls the second lead screw to rotate, causing the second slider to move. The second slider moves above the imprint position to replenish the glue filling at the imprint position.

[0055] 4. The edge pressing belt acts on both sides of the paper composite layer and the PET composite film to prevent glue from flowing out from both sides. The first inclined roller controls the glue entering the edge blocking structure to guide it towards the middle, and the second inclined roller controls the glue driven by the pressing roller to guide it towards the middle, driving the glue to flow through the paper composite layer so that the imprinted position is filled with glue. Attached Figure Description

[0056] Figure 1 This is a schematic diagram of the imprinting apparatus of this application;

[0057] Figure 2 This is a schematic diagram of the structure of the upper and lower imprinting plates of this application;

[0058] Figure 3 For the purposes of this application Figure 1 A magnified view of point A;

[0059] Figure 4 For the purposes of this application Figure 1 A magnified view of point B;

[0060] In the attached figures, the reference numerals are as follows: 100, frame; 110, first unwinding roller; 120, second unwinding roller; 130, guide roller; 140, cam seat; 200, impression device; 210, impression seat; 220, upper impression plate; 221, punch; 222, spring; 230, lower impression plate; 231, die; 240, first conveyor belt; 250, second conveyor belt; 300, negative pressure mechanism; 310, first negative pressure port; 320, second negative pressure port; 330, air pressure transmission. Sensor; 400, Glue applicator; 410, Mounting bracket; 420, First slide rail; 430, First slider; 431, Scanning device; 440, First lead screw; 450, First drive motor; 460, Second slide rail; 470, Second slider; 480, Second lead screw; 490, Second drive motor; 500, Pressing roller; 600, Edge retaining structure; 610, Pressure plate; 620, Roller; 630, Edge pressing belt; 640, First slanted roller; 650, Second slanted roller. Detailed Implementation

[0061] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0062] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0063] The portable server provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0064] Example 1:

[0065] like Figure 1 , Figure 2 As shown, this application embodiment provides an embossing device 200 for paper-plastic composite bags, including:

[0066] The frame 100 is equipped with a first unwinding roller 110, a second unwinding roller 120, and several guide rollers 130;

[0067] The imprinting apparatus 200 includes an imprinting base 210, an upper imprinting plate 220, and a lower imprinting plate 230;

[0068] The negative pressure mechanism 300 is placed on the lower printing plate 230;

[0069] The glue applicator 400 is used to add glue, and the glue applicator 400 is mounted on the impression base 210;

[0070] The pressing roller 500 is mounted on the impression base 210;

[0071] A side guard structure 600 is used to prevent glue from flowing out from the side, and the side guard structure 600 is installed on both sides of the pressing roller 500;

[0072] The printing device 200 is provided with a first conveyor belt 240, which is mounted on the printing base 210. The lower printing plate 230 is mounted on the first conveyor belt 240. The printing device 200 is provided with a second conveyor belt 250, which is mounted on the frame 100. The upper printing plate 220 is mounted on the second conveyor belt 250.

[0073] A paper composite layer, formed by bonding a paper layer and a PE film, is placed on the first unwinding roll 110. A PET composite film with an aluminum-coated layer is placed on the second unwinding roll 120. The two composite materials are guided by the guide roll 130. The paper composite layer is imprinted by the imprinting device 200 and formed by the extrusion action of the upper imprinting plate 220 and the lower imprinting plate 230. A negative pressure device maintains a static relationship between the paper composite layer and the lower imprinting plate 230. After imprinting, glue is applied to the paper composite layer by the glue coating device 400. The PET composite film is then placed on the paper composite layer by the guide roll 130. Then, the paper composite layer and the PET composite film are pressed and bonded by the pressing roller 500. The edge-blocking structure 600 prevents the glue from being squeezed out from both sides of the composite layer, allowing the glue to fill the imprint cavity, thereby improving the structural strength of the imprint structure of the paper composite layer and ensuring the connection stability between the paper composite layer and the PET composite film. The lower imprint plate 230 is moved by the first conveyor belt 240, and the upper imprint plate 220 is moved by the second conveyor belt 250. The moving speed of the first conveyor belt 240 and the second conveyor belt 250 is controlled to be consistent with the moving speed of the paper composite layer and the PET composite film.

[0074] Example 2:

[0075] like Figure 2 As shown, this application embodiment provides an embossing device 200 for paper-plastic composite bags. In addition to the aforementioned technical features, the lower embossing plate 230 is provided with a concave mold 231, the upper embossing plate 220 is provided with a convex mold 221, and the negative pressure mechanism 300 includes:

[0076] The first negative pressure port 310 is placed on the lower pressure plate 230;

[0077] The second negative pressure port 320 is placed on the die 231;

[0078] The air pressure sensor 330 is connected to the second negative pressure port 320.

[0079] The embossing on the paper composite layer is formed by the action of the concave mold 231 and the convex mold 221. When the paper composite layer is placed on the lower embossing plate 230, the first negative pressure port 310 is used to fix the paper composite layer. After the embossing is completed, the second negative pressure port 320 draws air into the concave mold 231 to maintain the embossed shape of the paper composite layer, which facilitates the demolding of the convex mold 221 and the subsequent filling of glue into the embossing. The formed embossing is monitored by the air pressure sensor 330. If the air pressure fluctuates greatly, it indicates that the paper composite layer is damaged during the embossing process, and an alarm inspection is required.

[0080] Furthermore, the frame 100 is provided with a cam seat 140, and a spring 222 is provided between the punch 221 and the upper imprint plate 220, and the punch 221 is adapted to the cam seat 140.

[0081] The punch 221 is movably connected to the upper imprint plate 220. When the upper imprint plate 220 and the lower imprint plate 230 are pressed together, the punch 221 moves towards the die 231 through the cam seat 140, thereby achieving imprinting. The punch 221 moves with the upper imprint plate 220. When the punch 221 separates from the cam seat 140, the punch 221 is reset under the action of the spring 222, which facilitates the separation of the upper imprint plate 220 and the lower imprint plate 230.

[0082] Example 3:

[0083] like Figure 3 As shown, this application embodiment provides an embossing device 200 for paper-plastic composite bags. In addition to the above-mentioned technical features, the adhesive coating device 400 further includes:

[0084] Mounting bracket 410 is mounted on imprint base 210;

[0085] The first slide rail 420 is placed on the mounting bracket 410;

[0086] The first slider 430 is adapted to the first slide rail 420;

[0087] The first lead screw 440 is mounted on the mounting bracket 410, and the first slider 430 is adapted to the first lead screw 440;

[0088] The first drive motor 450 is used to drive the first slider 430 to move;

[0089] The scanning device 431 is used to scan the imprint position and is mounted on the first slider 430.

[0090] The paper composite layer passes under the mounting frame 410. The first drive motor 450 drives the first lead screw 440 to rotate, causing the first slider 430 to move along the first slide rail 420. Glue is sprayed from the first slider 430. The first slider 430 moves on the first slide rail 420 to coat the paper composite layer with glue in a wave-like pattern. While the first slide rail 420 is being coated, the scanning device 431 scans the paper composite layer and records the deeper positions after the embossing is completed.

[0091] Furthermore, the adhesive application device 400 also includes:

[0092] The second slide rail 460 is placed on the mounting bracket 410;

[0093] The second slider 470 is adapted to the second slide rail 460;

[0094] The second lead screw 480 is mounted on the mounting bracket 410, and the second slider 470 is adapted to the second lead screw 480;

[0095] The second drive motor 490 is used to drive the second slider 470 to move.

[0096] After the imprint position is obtained by scanning by the scanning device 431, the second lead screw 480 is rotated by the second drive motor 490 to move the second slider 470. The second slider 470 moves to above the imprint position to replenish the glue filling at the imprint position.

[0097] Example 4:

[0098] like Figure 4 As shown, this application embodiment provides an embossing device 200 for paper-plastic composite bags. In addition to the above-mentioned technical features, the edge-blocking structure 600 further includes:

[0099] The pressure plate 610 is installed on the embossing base 210;

[0100] Roller 620 is mounted on pressure plate 610;

[0101] The pressing belt 630 is connected between the roller 620 and the pressing roller 500.

[0102] The pressure plate 610 is installed on both sides of the pressing roller 500. The starting end of the pressure plate 610 is further forward than the pressing roller 500. The edge pressing belt 630 is installed between the pressure plate 610 and the pressing roller 500 through the roller 620. The edge pressing belt 630 acts on both sides of the paper composite layer and the PET composite film to prevent glue from flowing out from both sides and to drive the glue through the paper composite layer so that the imprinted position is filled with glue.

[0103] Furthermore, the retaining structure 600 also includes:

[0104] The first inclined roller 640 is provided in several parts and installed on the pressure plate 610;

[0105] The second inclined roller 650 is provided in several units and is installed on the pressure plate 610;

[0106] The axis of the first inclined roller 640 forms an acute angle with the axis of the second inclined roller 650.

[0107] The first inclined roller 640 controls the glue entering the edge-blocking structure 600 to be guided towards the center, and the second inclined roller 650 controls the glue driven by the pressing roller 500 to be guided towards the center, reducing the accumulation of glue on the side and ensuring the filling of glue at the imprinting position.

[0108] Example 5:

[0109] This application also provides a processing method for an embossing device 200 for paper-plastic composite bags, the specific steps of which include:

[0110] S1, prepare the paper composite layer to be placed on the first unwinding roller 110, and prepare the aluminized PET composite film to be placed on the second unwinding roller 120;

[0111] S2, after the first unwinding roller 110 unwinds, it is guided into the imprinting device 200 by the guide roller 130. By controlling the moving speed of the first conveyor belt 240 and the second conveyor belt 250 to be the same as the moving speed of the paper composite layer, when the paper composite layer moves onto the lower imprinting plate 230, the first negative pressure port 310 is opened. The upper imprinting plate 220 and the lower imprinting plate 230 press the paper composite layer together. When the punch 221 moves to contact the cam seat 140, the paper composite layer is imprinted. Then the second negative pressure port 320 is activated. After the imprinting is completed, the punch 221 and the die 231 are separated. Then the upper imprinting plate 220 and the lower imprinting plate 230 are separated.

[0112] S3, the paper composite layer is coated with glue by the glue coating device 400, and then the PET composite film is unwound and guided by the guide roller 130 to correspond with the paper composite layer, and then pressed by the pressing roller 500.

[0113] The paper composite layer is first imprinted to form the required shape, and then the PET composite film is glued to the paper composite layer. This allows the imprinted position to maintain a good shape, and the PET composite film does not participate in the imprinting deformation, so that the aluminum coating layer on the PET composite film is not damaged.

[0114] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0115] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. An embossing device for paper-plastic composite bags, characterized in that include: The frame (100) is equipped with a first unwinding roller (110), a second unwinding roller (120), and several guide rollers (130). The imprinting apparatus (200) includes an imprinting base (210), an upper imprinting plate (220), and a lower imprinting plate (230). The negative pressure mechanism (300) is placed on the lower printing plate (230); A glue applicator (400) for adding glue is mounted on an impression base (210); A pressing roller (500) is mounted on an impression base (210); A side guard structure (600) is provided to prevent glue from flowing out from the side, the side guard structure (600) being installed on both sides of the pressing roller (500); The embossing device (200) is provided with a first conveyor belt (240), which is mounted on the embossing base (210). The lower embossing plate (230) is mounted on the first conveyor belt (240). The embossing device (200) is provided with a second conveyor belt (250), which is mounted on the frame (100). The upper embossing plate (220) is mounted on the second conveyor belt (250). The lower printing plate (230) is provided with a concave die (231), the upper printing plate (220) is provided with a convex die (221), and the negative pressure mechanism (300) includes: The first negative pressure port (310) is placed on the lower pressure plate (230); The second negative pressure port (320) is placed on the die (231); A pressure sensor (330) is connected to a second negative pressure port (320); The frame (100) is provided with a cam seat (140), and a spring (222) is provided between the punch (221) and the upper imprint plate (220). The punch (221) is adapted to the cam seat (140).

2. The embossing apparatus for paper-plastic composite bags according to claim 1, characterized in that, The adhesive applicator (400) includes: Mounting bracket (410) is mounted on the impression base (210); The first slide rail (420) is placed on the mounting bracket (410); The first slider (430) is adapted to the first slide rail (420); The first lead screw (440) is mounted on the mounting bracket (410), and the first slider (430) is adapted to the first lead screw (440); The first drive motor (450) is used to drive the first slider (430) to move; A scanning device (431) is used to scan the imprint position, and the scanning device (431) is mounted on the first slider (430).

3. The embossing device for paper-plastic composite bags according to claim 2, characterized in that, The adhesive applicator (400) further includes: The second slide rail (460) is placed on the mounting bracket (410); The second slider (470) is adapted to the second slide rail (460); The second lead screw (480) is mounted on the mounting bracket (410), and the second slider (470) is adapted to the second lead screw (480); The second drive motor (490) is used to drive the second slider (470) to move.

4. The embossing device for paper-plastic composite bags according to claim 1, characterized in that, The retaining structure (600) includes: A pressure plate (610) is installed on an embossing base (210); Roller (620) is mounted on pressure plate (610); The pressing belt (630) is connected between the roller (620) and the pressing roller (500).

5. The embossing device for paper-plastic composite bags according to claim 1, characterized in that, The retaining structure (600) further includes: The first inclined roller (640) is provided in several parts and is installed on the pressure plate (610); The second inclined roller (650) is provided in several parts and is installed on the pressure plate (610); The axis of the first inclined roller (640) forms an acute angle with the axis of the second inclined roller (650).

6. A processing method for an embossing apparatus suitable for the paper-plastic composite bag according to any one of claims 1-5, characterized in that, The specific steps include: S1, prepare the paper composite layer to be placed on the first unwinding roller (110), and prepare the aluminized PET composite film to be placed on the second unwinding roller (120); S2, after the first unwinding roller (110) is unwound, it is guided into the imprinting device (200) by the guide roller (130). By controlling the moving speed of the first conveyor belt (240) and the second conveyor belt (250) to be the same as the moving speed of the paper composite layer, when the paper composite layer moves to the lower imprinting plate (230), the first negative pressure port (310) is opened. The upper imprinting plate (220) and the lower imprinting plate (230) press the paper composite layer together. When the punch (221) moves to the point of contact with the cam seat (140), the imprinting of the paper composite layer is realized. Then the second negative pressure port (320) is activated. After the imprinting is completed, the punch (221) and the die (231) are separated. Then the upper imprinting plate (220) and the lower imprinting plate (230) are separated. S3, the paper composite layer is moved and coated with glue by the glue coating device (400), and then the PET composite film is unwound and guided by the guide roller (130) to correspond with the paper composite layer, and pressed by the pressing roller (500) to achieve bonding by glue.

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