Extrusion lamination three-layer composite roller set device

Abstract

The utility model discloses an extrusion lamination three-layer composite roller set device which comprises a machine frame, a driving roller, a driving mechanism, a first swing frame, a second swing frame, a first pressing roller, a second pressing roller, a first air cylinder and a second air cylinder. Wherein the driving roller is rotationally connected to the rack, the driving mechanism is connected with the driving roller and used for driving the driving roller to rotate, the first swing frame is rotationally connected to the rack, and the first pressing roller is rotationally connected to the first swing frame and located on one side of the driving roller; a forming channel allowing a first thin film and a second thin film to penetrate through is arranged between the first pressing roller and the driving roller, the extrusion die is used for extruding materials into the position, between the first thin film and the second thin film, in the forming channel, and one end of the first air cylinder is hinged to the rack. According to the laminating machine, laminating products can be laminated twice, so that the laminating products can be compounded more firmly, and the problem that the laminating products are layered and separated can be avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of extrusion film-coating three-layer composite roller group devices. BACKGROUND

[0002] Film-coating machine is a kind of extrusion forming machinery, for the molten material extruded in extrusion die is evenly coated in the surface of film in the way of film-coating, then after cooling solidification, material and film are tightly attached together to obtain film-coating product, film-coating product has the advantages of moisture-proof, corrosion-resistant, high strength and high toughness, and is widely used. In the Chinese patent with announcement number CN2486225Y, a kind of film-coating composite forming device of film-coating machine is disclosed, which can make the material extruded in extrusion die coated on film to produce film-coating product, but in the device, only cooling steel roller and cooling silica gel roller are used to press film-coating product once, and only once pressing will lead to the film layer and material layer in film-coating product not being tightly enough, and further lead to the risk of film-coating product delaminating. SUMMARY

[0003] The technical problem to be solved by the utility model is to overcome the defects of prior art, and provide a kind of extrusion film-coating three-layer composite roller group device, which can press film-coating product twice to make film-coating product composite more tightly, and can avoid the problem of film-coating product delaminating.

[0004] To solve the above technical problems, the technical scheme of the utility model is as follows: a kind of extrusion film-coating three-layer composite roller group device, including rack, driving roller, drive mechanism, first swing frame, second swing frame, first pressure roller, second pressure roller, first cylinder and second cylinder;

[0005] The driving roller is rotatably connected to the rack;

[0006] The drive mechanism is connected to the driving roller and is used to drive the driving roller to rotate;

[0007] The first swing frame is rotatably connected to the rack;

[0008] The first pressure roller is rotatably connected to the first swing frame and located on one side of the driving roller, and a forming passage for the first film and the second film to pass through is provided between the first pressure roller and the driving roller, and extrusion die is used to extrude material between the first film and the second film in the forming passage;

[0009] One end of the first cylinder is hinged to the frame, and the other end of the first cylinder is hinged to the first swing frame, and the first cylinder is used to drive the first swing frame to swing and in turn drive the first compression roller to swing and press on the driving roller to compress the first film, the second film and the material between the first film and the second film in the forming channel to form a laminated product;

[0010] The second swing frame is rotationally connected to the frame;

[0011] The second compression roller is rotationally connected to the second swing frame and located on the other side of the driving roller, and the laminated product is wound around the driving roller and passes between the driving roller and the second compression roller;

[0012] One end of the second cylinder is hinged to the frame, and the other end of the second cylinder is hinged to the second swing frame, and the second cylinder is used to drive the second swing frame to swing and in turn drive the second compression roller to swing and press on the driving roller to compress the laminated product.

[0013] Further, the driving roller, the first compression roller and the second compression roller are cooling rollers, and the first compression roller and the second compression roller are wrapped with a silica gel layer on the roller surface.

[0014] Further, the extrusion laminating three-layer composite roller set device further comprises an auxiliary compression roller, a left sliding seat, a right sliding seat, a left cylinder and a right cylinder;

[0015] The left sliding seat and the right sliding seat are respectively slidingly connected to the first swing frame;

[0016] One end of the auxiliary compression roller is rotationally connected to the left sliding seat;

[0017] The other end of the auxiliary compression roller is rotationally connected to the right sliding seat;

[0018] The left cylinder and the right cylinder are respectively connected to the first swing frame, the left cylinder is connected to the left sliding seat and is used to drive the left sliding seat to move towards the first compression roller, the right cylinder is connected to the right sliding seat and is used to drive the right sliding seat to move towards the first compression roller, and in turn drive the auxiliary compression roller to move and compress on the first compression roller, and the auxiliary compression roller is a cooling roller.

[0019] Further, the first swing frame comprises two first swing arms, and the two first swing arms are respectively rotationally connected to the frame;

[0020] One end of the first compression roller is rotationally connected to one of the first swing arms, and the other end of the first compression roller is rotationally connected to the other first swing arm;

[0021] The first cylinder is provided with two and corresponds to the first swing arm one by one, the cylinder body of the first cylinder is hinged on the frame, the piston rod of the first cylinder is hinged with the corresponding first swing arm, and the first cylinder is used to drive the corresponding first swing arm to swing;

[0022] The left slide seat is slidingly connected to one of the first swing arms, and the right slide seat is slidingly connected to the other first swing arm;

[0023] The left cylinder is connected to one of the first swing arms, and the right cylinder is connected to the other first swing arm;

[0024] The second swing frame includes two second swing arms, and the two second swing arms are respectively rotationally connected to the frame;

[0025] One end of the second compression roller is rotationally connected to one of the second swing arms, and the other end of the second compression roller is rotationally connected to the other second swing arm;

[0026] The second cylinder is provided with two and corresponds to the second swing arm one by one, the cylinder body of the second cylinder is hinged on the frame, the piston rod of the second cylinder is hinged with the corresponding second swing arm, and the second cylinder is used to drive the corresponding second swing arm to swing.

[0027] Further, the extrusion film three-layer composite roller set device also includes a first flattening roller and a second flattening roller;

[0028] The first flattening roller is rotationally connected to the first swing frame, and the first film is connected to the first flattening roller and then passes through the forming channel;

[0029] The second flattening roller is rotationally connected to the frame, and the second film is connected to the second flattening roller and then passes through the forming channel.

[0030] Further, the extrusion film three-layer composite roller set device also includes a tensioning mechanism, a tensioning sensor and a controller;

[0031] The tensioning sensor is connected to the first film and is used to detect the tensioning force information of the first film;

[0032] The tensioning sensor is also connected to the controller and is used to send the detected tensioning force information of the first film to the controller;

[0033] The tensioning mechanism is connected to the frame, and the first film is connected to the tensioning mechanism;

[0034] The controller is connected to the tensioning mechanism control, and the controller is used to control the tensioning mechanism to act according to the tensioning force information of the first film, so as to keep the constant tensioning force of the first film.

[0035] Further, the tensioning mechanism comprises a tensioning frame, a first tensioning roller, a second tensioning roller and a tensioning cylinder.

[0036] The first tensioning roller and the second tensioning roller are respectively rotatably connected to the tensioning frame, and the first film is connected to the first tensioning roller and the second tensioning roller.

[0037] The tensioning frame is rotatably connected to the rack with the center axis of the first tensioning roller as the pivot axis.

[0038] One end of the tensioning cylinder is hinged to the rack, and the other end of the tensioning cylinder is hinged to the tensioning frame.

[0039] The controller is connected to the tensioning cylinder control, and the controller is used to control the tensioning cylinder to act according to the tensioning force information of the first film, so as to keep the constant tensioning force of the first film.

[0040] Further, the tensioning frame comprises a first horizontal shaft, a second horizontal shaft and two end plates.

[0041] The left end of the first horizontal shaft and the left end of the second horizontal shaft are respectively connected to one of the end plates.

[0042] The right end of the first horizontal shaft and the right end of the second horizontal shaft are respectively connected to the other end plate.

[0043] The first horizontal shaft is rotatably connected to the rack.

[0044] The first tensioning roller is rotatably connected to the first horizontal shaft.

[0045] The second tensioning roller is rotatably connected to the second horizontal shaft.

[0046] The tensioning cylinder is provided with two and corresponds to the end plate one by one, and the cylinder body of the tensioning cylinder is hinged to the rack, and the piston rod of the tensioning cylinder is hinged to the corresponding end plate.

[0047] Further, the extrusion film three-layer composite roller group device further comprises a limiting mechanism corresponding to the end plate one by one, and the limiting mechanism comprises a limiting frame, a front stopper and a rear stopper.

[0048] The limiting frame is connected to the rack, and the front stopper and the rear stopper are connected to the limiting frame, and the corresponding end plate is located between the front stopper and the rear stopper.

[0049] Further, a displacement sensor for detecting displacement and position of a piston rod in the tensioning cylinder is connected to the tensioning cylinder.

[0050] After the above technical scheme is adopted, the material can be pressed and compounded with the first film and the second film to form a shower film product in the embodiment of the application, the shower film product can be pressed for the first time by the driving roller and the first pressing roller, the shower film product can be pressed for the second time by the driving roller and the second pressing roller, so that the shower film product can be pressed twice to make the shower film product more tightly compounded, thereby avoiding the problem of delamination of the shower film product. BRIEF DESCRIPTION OF DRAWINGS

[0051] Fig. 1 It is a front view of the extrusion shower film three-layer composite roller set device of the utility model;

[0052] Fig. 2 It is a perspective view of the extrusion shower film three-layer composite roller set device of the utility model;

[0053] Fig. 3 It is a structural schematic view of the tensioning mechanism of the utility model. DETAILED DESCRIPTION

[0054] In order to make the content of the utility model more easily and clearly understood, the utility model will be further described in detail below according to specific embodiments and in combination with the drawings.

[0055] As Figs. 1-3 shown, an extrusion shower film three-layer composite roller set device, comprising a rack 1, a driving roller 2, a driving mechanism 3, a first swing frame 4, a second swing frame 5, a first pressing roller 6, a second pressing roller 7, a first cylinder 8 and a second cylinder 9;

[0056] The driving roller 2 is rotatably connected to the rack 1;

[0057] The driving mechanism 3 is connected to the driving roller 2 and is used for driving the driving roller 2 to rotate, and the driving mechanism 3 is connected to the rack 1;

[0058] The first swing frame 4 is rotatably connected to the rack 1;

[0059] The first pressure roller 6 is rotationally connected to the first swing frame 4 and located on one side of the driving roller 2, and a forming channel for the first film 10 and the second film 11 to pass through is arranged between the first pressure roller 6 and the driving roller 2, and an extrusion die is arranged for extruding the material 12 between the first film 10 and the second film 11 in the forming channel;

[0060] One end of the first air cylinder 8 is hinged to the frame 1, and the other end of the first air cylinder 8 is hinged to the first swing frame 4, and the first air cylinder 8 is used to drive the first swing frame 4 to swing and in turn drive the first pressure roller 6 to swing to be pressed on the driving roller 2 to press and compound the first film 10, the second film 11 and the material 12 between the first film 10 and the second film 11 in the forming channel to form the laminated product 13.

[0061] The second swing frame 5 is rotationally connected to the frame 1.

[0062] The second pressure roller 7 is rotationally connected to the second swing frame 5 and located on the other side of the driving roller 2, and the laminated product 13 is wound on the driving roller 2 and passes through between the driving roller 2 and the second pressure roller 7.

[0063] One end of the second air cylinder 9 is hinged to the frame 1, and the other end of the second air cylinder 9 is hinged to the second swing frame 5, and the second air cylinder 9 is used to drive the second swing frame 5 to swing and in turn drive the second pressure roller 7 to swing to be pressed on the driving roller 2 and in turn press and compound the laminated product 13, so that the first film 10, the material 12 and the second film 11 in the laminated product 13 are more tightly compounded. Specifically, the material 12, the first film 10 and the second film 11 can be pressed and compounded to form the laminated product 13, the laminated product 13 can be pressed for the first time by the driving roller 2 and the first pressure roller 6, the laminated product 13 can be pressed for the second time by the driving roller 2 and the second pressure roller 7, so that the laminated product 13 can be pressed twice to be more tightly compounded, thereby avoiding the problem of delamination of the laminated product 13.

[0064] Specifically, the frame 1 is further connected with an output roller 14, the laminated product 13 winds on the second pressure roller 7 after passing between the driving roller 2 and the second pressure roller 7, and then is connected to the output roller 14 and extends to the next process.

[0065] The driving mechanism 3 comprises a motor and a speed reducer, the motor is connected with the speed reducer, the speed reducer is connected with the driving roller 2 through a chain mechanism, so that the motor drives the driving roller 2 to rotate through the speed reducer, and the motor and the speed reducer are connected on the rack 1. Wherein, the first film 10 and the second film 11 are both finished product base film prepared in advance.

[0066] Specifically, the driving roller 2, the first pressing roller 6 and the second pressing roller 7 are all cooling rollers, and the surfaces of the first pressing roller 6 and the second pressing roller 7 are wrapped with a silica gel layer.

[0067] As shown in Fig. 1 , 2 , the extrusion film three-layer composite roller group device can further comprise an auxiliary pressing roller 15, a left sliding seat 16, a right sliding seat 17, a left air cylinder 18 and a right air cylinder 19.

[0068] The left sliding seat 16 and the right sliding seat 17 are respectively slidably connected on the first swing frame 4.

[0069] One end of the auxiliary pressing roller 15 is rotatably connected on the left sliding seat 16.

[0070] The other end of the auxiliary pressing roller 15 is rotatably connected on the right sliding seat 17.

[0071] The left air cylinder 18 and the right air cylinder 19 are respectively connected on the first swing frame 4, the left air cylinder 18 is connected with the left sliding seat 16 and is used to drive the left sliding seat 16 to move towards the first pressing roller 6, the right air cylinder 19 is connected with the right sliding seat 17 and is used to drive the right sliding seat 17 to move towards the first pressing roller 6, thereby driving the auxiliary pressing roller 15 to move to be pressed on the first pressing roller 6, and the auxiliary pressing roller 15 is a cooling roller. Specifically, the specific structure of the cooling roller is well known to those skilled in the art, and the cooling roller is internally provided with a spiral groove, and water is supplied into the spiral groove from the end of the cooling roller to achieve the cooling effect. In the embodiment, the first pressing roller 6 and the auxiliary pressing roller 15 are both cooling rollers, the first pressing roller 6 can cool the inner surface of the silica gel layer after water cooling, and the auxiliary pressing roller 15 is pressed on the first pressing roller 6, so that the auxiliary pressing roller 15 can cool the outer surface of the silica gel layer after water cooling.

[0072] As shown in Fig. 1 , 2 , the first swing frame 4 comprises two first swing arms 20, and the two first swing arms 20 are respectively rotatably connected on the rack 1.

[0073] One end of the first compression roller 6 is rotatably connected to one of the first swing arms 20, and the other end of the first compression roller 6 is rotatably connected to the other first swing arm 20;

[0074] The first cylinder 8 is provided with two and corresponds to the first swing arm 20 one by one, the cylinder body of the first cylinder 8 is hinged to the machine frame 1, the piston rod of the first cylinder 8 is hinged to the corresponding first swing arm 20, and the first cylinder 8 is used to drive the corresponding first swing arm 20 to swing, thereby driving the whole first swing frame 4 to swing;

[0075] The left sliding seat 16 is slidingly connected to one of the first swing arms 20, and the right sliding seat 17 is slidingly connected to the other first swing arm 20;

[0076] The left cylinder 18 is connected to one of the first swing arms 20, and the right cylinder 19 is connected to the other first swing arm 20;

[0077] The second swing frame 5 includes two second swing arms 21, and the two second swing arms 21 are respectively rotatably connected to the machine frame 1;

[0078] One end of the second compression roller 7 is rotatably connected to one of the second swing arms 21, and the other end of the second compression roller 7 is rotatably connected to the other second swing arm 21;

[0079] The second cylinder 9 is provided with two and corresponds to the second swing arm 21 one by one, the cylinder body of the second cylinder 9 is hinged to the machine frame 1, the piston rod of the second cylinder 9 is hinged to the corresponding second swing arm 21, and the second cylinder 9 is used to drive the corresponding second swing arm 21 to swing, thereby driving the whole second swing frame 5 to swing.

[0080] As shown in Fig. 1 , 2 The extrusion film three-layer composite roller group device can further include a first flattening roller 22 and a second flattening roller 23;

[0081] The first flattening roller 22 is rotatably connected to the first swing frame 4, and the first film 10 is connected to the first flattening roller 22 and then passes through the forming channel;

[0082] The second flattening roller 23 is rotatably connected to the frame 1, the second film 11 is connected to the second flattening roller 23 and then passes through the forming channel, one end of the first flattening roller 22 is rotatably connected to one of the first swing arms 20, and the other end of the first flattening roller 22 is rotatably connected to the other first swing arm 20; the first flattening roller 22 is used to evenly expand the first film 10, and the second flattening roller 23 is used to evenly expand the second film 11.

[0083] As shown in Figs. 1-3 , the extrusion film three-layer composite roller group device can further comprise a tensioning mechanism 24, a tensioning sensor and a controller;

[0084] The tensioning sensor is connected to the first film 10 and is used to detect the tensioning force information of the first film 10;

[0085] The tensioning sensor is also connected to the controller and is used to send the detected tensioning force information of the first film 10 to the controller;

[0086] The tensioning mechanism 24 is connected to the frame 1, and the first film 10 is connected to the tensioning mechanism 24;

[0087] The controller is connected to the tensioning mechanism 24, and the controller is used to control the action of the tensioning mechanism 24 according to the tensioning force information of the first film 10 to keep the first film 10 at a constant tensioning force; the specific structure of the tensioning sensor is well known to those skilled in the art and is prior art, and will not be described in detail in this embodiment. The controller can be a PLC controller.

[0088] As shown in Figs. 1-3 , the tensioning mechanism 24 can comprise a tensioning frame 25, a first tensioning roller 26, a second tensioning roller 27 and a tensioning cylinder 28;

[0089] The first tensioning roller 26 and the second tensioning roller 27 are rotatably connected to the tensioning frame 25 respectively, and the first film 10 is connected to the first tensioning roller 26 and the second tensioning roller 27;

[0090] The tensioning frame 25 is pivotally connected to the frame 1 with the center axis of the first tensioning roller 26 as the pivot axis;

[0091] One end of the tensioning cylinder 28 is hingedly connected to the frame 1, and the other end of the tensioning cylinder 28 is hingedly connected to the tensioning frame 25;

[0092] The controller is connected with the tensioning cylinder 28, and the controller is used for controlling the extension and retraction of the tensioning cylinder 28 according to the tension information of the first film 10, so as to drive the tensioning frame 25 to swing and drive the second tensioning roller 27 to swing, so that the second tensioning roller 27 tightly abuts against the first film 10, and the first film 10 maintains constant tension. Specifically, when the tension sensor detects that the tension of the first film 10 is too large, the tensioning cylinder 28 is elongated to drive the tensioning frame 25 and the second tensioning roller 27 to swing to relax the abutment of the first film 10; when the tension sensor detects that the tension of the first film 10 is too small, the tensioning cylinder 28 is shortened to drive the tensioning frame 25 and the second tensioning roller 27 to swing to increase the abutment of the first film 10, so that the first film 10 maintains constant tension. In the embodiment, the first film 10 is sequentially connected to the second tensioning roller 27, the first tensioning roller 26 and the first flattening roller 22, and then passes through the forming channel. The first tensioning roller 26 and the second tensioning roller 27 can be aluminum rollers.

[0093] As shown in Figs. 1-3 The tensioning frame 25 can include a first horizontal shaft 29, a second horizontal shaft 30 and two end plates 31.

[0094] The left end of the first horizontal shaft 29 and the left end of the second horizontal shaft 30 are respectively connected with one of the end plates 31.

[0095] The right end of the first horizontal shaft 29 and the right end of the second horizontal shaft 30 are respectively connected with the other end plate 31.

[0096] The first horizontal shaft 29 is rotatably connected to the rack 1.

[0097] The first tensioning roller 26 is rotatably connected to the first horizontal shaft 29.

[0098] The second tensioning roller 27 is rotatably connected to the second horizontal shaft 30.

[0099] The tensioning cylinder 28 is provided with two and corresponds to the end plate 31, the cylinder body of the tensioning cylinder 28 is hinged to the rack 1, and the piston rod of the tensioning cylinder 28 is hinged to the corresponding end plate 31, so that the controller controls the tensioning cylinder 28 to extend and retract, so as to drive the end plate 31 and the second horizontal shaft 30 to swing around the first horizontal shaft 29 respectively, and then drive the second tensioning roller 27 to swing around the first horizontal shaft 29.

[0100] As shown in Figs. 1-3 The extrusion film three-layer composite roller group device can further include a limiting mechanism 32 corresponding to the end plate 31, and the limiting mechanism 32 includes a limiting frame 33, a front stop block 34 and a rear stop block 35.

[0101] The limiting frame 33 is connected to the rack 1, the front block 34 and the rear block 35 are connected to the limiting frame 33, and the end plate 31 is located between the front block 34 and the rear block 35, thereby limiting the swing angle of the end plate 31 through the front block 34 and the rear block, thereby being able to limit the swing angle of the whole tensioning frame 25, and thereby being able to limit the swing stroke of the second tensioning roller 27.

[0102] As shown in Fig. 3 The tensioning cylinder 28 is connected with a displacement sensor 36 for detecting the displacement and position of the piston rod in the tensioning cylinder 28, the specific structure of the displacement sensor 36 is well known to those skilled in the art, and will not be described in detail in this embodiment, and the tensioning cylinder 28 can be a low-friction cylinder.

[0103] As described above, the material 12 can be pressed and combined with the first film 10 and the second film 11 to form the laminated film product 13, the laminated film product 13 can be pressed for the first time by the driving roller 2 and the first pressing roller 6, the laminated film product 13 can be pressed for the second time by the driving roller 2 and the second pressing roller 7, so that the laminated film product 13 can be pressed twice to make the laminated film product 13 more tightly, thereby avoiding the problem of delamination of the laminated film product 13.

[0104] The above specific embodiments further illustrate the technical problems, technical solutions and beneficial effects solved by the utility model, and it should be understood that the above description is only for specific embodiments of the utility model and is not used to limit the utility model, and any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A three-layer composite roller assembly for extrusion coating, characterized in that, It includes a frame (1), a drive roller (2), a drive mechanism (3), a first swing frame (4), a second swing frame (5), a first pressure roller (6), a second pressure roller (7), a first cylinder (8), and a second cylinder (9); The drive roller (2) is rotatably connected to the frame (1); The drive mechanism (3) is connected to the drive roller (2) and is used to drive the drive roller (2) to rotate; The first swing frame (4) is rotatably connected to the frame (1); The first pressure roller (6) is rotatably connected to the first swing frame (4) and located on one side of the active roller (2). A forming channel is provided between the first pressure roller (6) and the active roller (2) for the first film (10) and the second film (11) to pass through. The extrusion die is used to extrude the material (12) between the first film (10) and the second film (11) in the forming channel. One end of the first cylinder (8) is hinged to the frame (1), and the other end of the first cylinder (8) is hinged to the first swing frame (4). The first cylinder (8) is used to drive the first swing frame (4) to swing, thereby driving the first pressure roller (6) to swing to press against the active roller (2) to press the first film (10), the second film (11) and the material (12) located between the first film (10) and the second film (11) in the forming channel to form a coated product (13). The second swing frame (5) is rotatably connected to the frame (1); The second pressure roller (7) is rotatably connected to the second swing frame (5) and located on the other side of the active roller (2). The coated product (13) is wrapped around the active roller (2) and passes between the active roller (2) and the second pressure roller (7). One end of the second cylinder (9) is hinged to the frame (1), and the other end of the second cylinder (9) is hinged to the second swing frame (5). The second cylinder (9) is used to drive the second swing frame (5) to swing, thereby driving the second pressure roller (7) to swing and press onto the active roller (2) to press and laminate the coated product (13).

2. The extrusion coating three-layer composite roller assembly device according to claim 1, characterized in that, The active roller (2), the first pressure roller (6) and the second pressure roller (7) are all cooling rollers, and the roller surfaces of the first pressure roller (6) and the second pressure roller (7) are covered with a silicone layer.

3. The extrusion coating three-layer composite roller assembly device according to claim 2, characterized in that, It also includes an auxiliary pressure roller (15), a left slide (16), a right slide (17), a left cylinder (18), and a right cylinder (19); The left slide (16) and the right slide (17) are slidably connected to the first swing frame (4); One end of the auxiliary pressure roller (15) is rotatably connected to the left slide block (16); The other end of the auxiliary pressure roller (15) is rotatably connected to the right slide block (17); The left cylinder (18) and the right cylinder (19) are respectively connected to the first swing frame (4). The left cylinder (18) is connected to the left slide (16) and is used to drive the left slide (16) to move toward the first pressure roller (6). The right cylinder (19) is connected to the right slide (17) and is used to drive the right slide (17) to move toward the first pressure roller (6), thereby driving the auxiliary pressure roller (15) to move to press against the first pressure roller (6). The auxiliary pressure roller (15) is a cooling roller.

4. The extrusion coating three-layer composite roller assembly device according to claim 3, characterized in that, The first swing frame (4) includes two first swing arms (20), which are rotatably connected to the frame (1); One end of the first pressure roller (6) is rotatably connected to one of the first swing arms (20), and the other end of the first pressure roller (6) is rotatably connected to the other first swing arm (20); Two first cylinders (8) are provided and correspond one-to-one with the first swing arm (20). The cylinder body of the first cylinder (8) is hinged to the frame (1). The piston rod of the first cylinder (8) is hinged to the corresponding first swing arm (20). The first cylinder (8) is used to drive the corresponding first swing arm (20) to swing. The left slide (16) is slidably connected to one of the first swing arms (20), and the right slide (17) is slidably connected to the other first swing arm (20); The left cylinder (18) is connected to one of the first rocker arms (20), and the right cylinder (19) is connected to the other first rocker arm (20); The second swing frame (5) includes two second swing arms (21), which are rotatably connected to the frame (1); One end of the second pressure roller (7) is rotatably connected to one of the second swing arms (21), and the other end of the second pressure roller (7) is rotatably connected to the other second swing arm (21); There are two second cylinders (9) that correspond one-to-one with the second swing arm (21). The cylinder body of the second cylinder (9) is hinged to the frame (1). The piston rod of the second cylinder (9) is hinged to the corresponding second swing arm (21). The second cylinder (9) is used to drive the corresponding second swing arm (21) to swing.

5. The extrusion coating three-layer composite roller assembly device according to claim 1, characterized in that, It also includes a first flattening roller (22) and a second flattening roller (23); The first flattening roller (22) is rotatably connected to the first swing frame (4), and the first film (10) is connected to the first flattening roller (22) and then passes through the forming channel; The second flattening roller (23) is rotatably connected to the frame (1), and the second film (11) is connected to the second flattening roller (23) and then passes through the forming channel.

6. The extrusion coating three-layer composite roller assembly device according to claim 1, characterized in that, It also includes a tensioning mechanism (24), a tensioning sensor, and a controller; the tensioning sensor is connected to the first film (10) and is used to detect the tension force information of the first film (10); the tensioning sensor is also connected to the controller and is used to send the detected tension force information of the first film (10) to the controller; the tensioning mechanism (24) is connected to the frame (1), and the first film (10) is connected to the tensioning mechanism (24); The controller is connected to the tensioning mechanism (24) and is used to control the tensioning mechanism (24) to operate according to the tension information of the first film (10) so that the first film (10) maintains a constant tension.

7. The extrusion coating three-layer composite roller assembly device according to claim 6, characterized in that, The tensioning mechanism (24) includes a tensioning frame (25), a first tensioning roller (26), a second tensioning roller (27), and a tensioning cylinder (28); The first tensioning roller (26) and the second tensioning roller (27) are rotatably connected to the tensioning frame (25), and the first film (10) is connected to the first tensioning roller (26) and the second tensioning roller (27); The tensioning frame (25) is rotatably connected to the frame (1) with the central axis of the first tensioning roller (26) as the pivot axis; One end of the tensioning cylinder (28) is hinged to the frame (1), and the other end of the tensioning cylinder (28) is hinged to the tensioning frame (25); The controller is connected to the tension cylinder (28) and is used to control the extension and retraction of the tension cylinder (28) according to the tension information of the first film (10), thereby driving the tension frame (25) to swing, thereby driving the second tension roller (27) to swing so that the second tension roller (27) presses against the first film (10), thereby keeping the first film (10) at a constant tension.

8. The extrusion coating three-layer composite roller assembly device according to claim 7, characterized in that, The tensioning frame (25) includes a first horizontal shaft (29), a second horizontal shaft (30), and two end plates (31); The left end of the first horizontal axis (29) and the left end of the second horizontal axis (30) are respectively connected to one of the end plates (31); The right end of the first horizontal axis (29) and the right end of the second horizontal axis (30) are respectively connected to the other end plate (31); The first horizontal shaft (29) is rotatably connected to the frame (1), the first tension roller (26) is rotatably connected to the first horizontal shaft (29), and the second tension roller (27) is rotatably connected to the second horizontal shaft (30); Two tensioning cylinders (28) are provided and correspond one-to-one with the end plate (31). The cylinder body of the tensioning cylinder (28) is hinged to the frame (1), and the piston rod of the tensioning cylinder (28) is hinged to the corresponding end plate (31).

9. The extrusion coating three-layer composite roller assembly device according to claim 8, characterized in that, It also includes a limiting mechanism (32) corresponding to the end plate (31) one by one. The limiting mechanism (32) includes a limiting frame (33), a front stop (34) and a rear stop (35); The limiting frame (33) is connected to the frame (1), the front stop (34) and the rear stop (35) are connected to the limiting frame (33), and the corresponding end plate (31) is located between the front stop (34) and the rear stop (35).

10. The extrusion coating three-layer composite roller assembly device according to claim 7, characterized in that, The tensioning cylinder (28) is connected to a displacement sensor (36) for detecting the displacement and position of the piston rod in the tensioning cylinder (28).

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