Five-roller film coating device for forward coating and reverse coating processes

Abstract

The utility model discloses a five-roller film coating device for two processes of forward coating and reverse coating, which comprises a forward glue coating steel roller, a reverse glue coating steel roller, a forward transfer glue roller and a reverse transfer glue roller, and the two processes share a glue tank; the diameter of the reverse transfer rubber roller is smaller than that of the forward transfer rubber roller, and the forward transfer rubber roller and the reverse transfer rubber roller are arranged below the forward glue coating steel roller and the reverse glue coating steel roller and are arranged relative to the forward glue coating steel roller and the reverse glue coating steel roller; the forward glue coating steel roller, the reverse glue coating steel roller, the forward transfer glue roller and the reverse transfer glue roller are respectively driven by a motor to rotate, a transverse transmission mechanism is used for adjusting the relative distance between the forward glue coating steel roller and the reverse glue coating steel roller, and the forward transfer glue roller and the reverse transfer glue roller are respectively provided with a lifting mechanism. The working states of the forward gluing steel roller and the reverse gluing steel roller are interchanged, and the working states of the forward transfer rubber roller and the reverse transfer rubber roller are interchanged, so that two processes of forward coating and reverse coating are interchanged.

Description

Technical Field

[0001] The utility model relates to a five-roller coating device used for both forward coating and reverse coating processes. Background Art

[0002] The coating device needs two processes, forward coating and reverse coating, according to the amount of glue applied. Forward coating is suitable for coating thin glue films and resin substrates with low viscosity; reverse coating is suitable for coating relatively thick glue films and resin substrates with relatively high viscosity.

[0003] Forward coating means that the movement direction of the glue roller is the same as that of the release paper; reverse coating means that the movement direction of the glue roller is opposite to that of the release paper.

[0004] The coating machine required in the field of fiber-reinforced resin-based composite materials is a high-precision coating machine, which requires a coating accuracy (based on the size of the gram weight) of 0.5 g / m2 to 3 g / m2, and the gap of the coating roller of 0.01 mm corresponds to a film weight of 12 g / m2 to 15 g / m2. It can be seen that the gap accuracy of the coating roller must be controlled at the micron level to achieve such a high coating accuracy. In order to achieve such high precision requirements, each link of the coating device must meet stringent requirements.

[0005] Defects and shortcomings of the existing technology:

[0006] 1) The general glue coating machine only has the function of forward coating or reverse coating, not both;

[0007] 2) Three rubber rollers are used, one rubber roller is used to coat one rubber groove in the forward direction and one rubber groove in the reverse direction, which is inconvenient to operate;

[0008] 3) Two gluing rollers and one rubber roller are used. The rubber roller needs to move up and down as well as left and right, which reduces the gluing accuracy. Summary of the invention

[0009] In view of the above problems, the purpose of the utility model is to provide a five-roller coating device for both forward coating and reverse coating processes, and to achieve the interchange of the two processes with one glue tank.

[0010] In order to achieve the above purpose, the scheme of the utility model is:

[0011] A five-roller coating device for forward coating and reverse coating processes, comprising a glue coating steel roller, a resin transfer rubber roller, a glue tank and a frame, wherein the glue coating steel roller and the resin transfer rubber roller are installed on the frame, wherein: the glue tank is a common glue tank for the two processes, the glue coating steel roller is two steel rollers with the same diameter, namely a forward glue coating steel roller and a reverse glue coating steel roller; there are two resin transfer rubber rollers, namely a forward transfer rubber roller and a reverse transfer rubber roller; the diameter of the reverse transfer rubber roller is smaller than the diameter of the forward transfer rubber roller, the forward transfer rubber roller and the reverse transfer rubber roller are placed under the forward glue coating steel roller and the reverse glue coating steel roller, the forward transfer rubber roller is arranged relative to the forward glue coating steel roller, the reverse transfer rubber roller is arranged relative to the reverse glue coating steel roller, a supporting steel roller is closely arranged under the reverse transfer rubber roller, the forward glue coating steel roller The roller and the reverse glue coating steel roller and the forward transfer glue roller and the reverse transfer glue roller are respectively driven to rotate by motors, a transverse transmission mechanism adjusts the relative distance between the forward glue coating steel roller and the reverse glue coating steel roller, the forward transfer glue roller and the reverse transfer glue roller are respectively connected with lifting mechanisms, the distance between the forward transfer glue roller and the reverse transfer glue roller and the forward glue coating steel roller and the reverse glue coating steel roller is adjusted by the lifting mechanism, and the common glue groove is formed by setting sealing plates at both ends between the forward glue coating steel roller and the reverse glue coating steel roller; the forward glue coating steel roller and the reverse glue coating steel roller are respectively interchanged in the working state of forward glue coating and reverse glue coating, and the working state of the forward transfer glue roller and the reverse transfer glue roller are interchanged accordingly, so that the interchange of the two processes of forward coating and reverse coating is formed under a common glue groove.

[0012] A further solution is that the diameter of the forward glue coating steel roller is the same as that of the forward transfer rubber roller, and the diameter of the reverse transfer rubber roller is one half to two thirds of the diameter of the reverse glue coating steel roller.

[0013] The solution is further that: the support steel roller can be controlled to move up and down by a support cylinder, and the diameter of the support steel roller is equal to or greater than the diameter of the reverse transfer rubber roller.

[0014] The solution is further as follows: the forward glue-coated steel roller and the reverse glue-coated steel roller are respectively driven to rotate by a motor through a gear transmission mechanism, and the forward transfer rubber roller and the reverse transfer rubber roller are respectively connected to the motor through connecting shafts with cross universal couplings at both ends, and the motor drives the forward transfer rubber roller and the reverse transfer rubber roller to rotate through the cross universal coupling.

[0015] The solution is further as follows: the transverse transmission mechanism includes a horizontally arranged screw shaft, which is driven to rotate by a servo motor, and the rotating shafts at both ends of the two steel rollers are respectively fixed and rotated by bearings, wherein the bearing of one steel roller is positioned and fixed on the frame through a bearing seat, and the bearing of the other steel roller is positioned on the lower horizontal slide rail through a bearing seat, and the screw shaft is threadedly connected to the threaded hole set in the bearing seat of the other steel roller. The servo motor drives the screw shaft to rotate, and the rotating screw shaft drives the bearing seat of the other steel roller to move along the lower horizontal slide rail through the thread, thereby realizing the adjustment of the spacing distance between the two steel rollers.

[0016] The scheme is further as follows: the gear transmission of the other steel roller includes a driving gear and a driven gear, and the driving gear and the driven gear transmit rotation through an intermediate wheel, the intermediate wheel is positioned on a first rotating plate, and the driven gear is positioned on a second rotating plate, the first rotating plate is sleeved on the output shaft of the steel roller driving motor of the other steel roller, and the second rotating plate is sleeved on the positioning shaft of the intermediate wheel; when adjusting the horizontal movement of the bearing seat of the other steel roller, the first rotating plate and the second rotating plate swing accordingly to ensure the horizontal movement of the bearing seat of the other steel roller.

[0017] The solution is further as follows: an upper horizontal slide rail is fixedly provided on the upper end surface of the bearing seat of the other steel roller, a slide block is provided on the upper horizontal slide rail, the upper horizontal slide rail can slide along the slide limit of the slide block, a clamping device is provided on the top surface of the slide block, the clamping device is fixedly connected to the frame, and the elastic clamping device reduces and stabilizes the sliding gap between the bearing seat of the other steel roller and the lower horizontal slide rail through the slide block, thereby improving the distance adjustment accuracy between the two steel rollers.

[0018] A further solution is that the clamping device is a spring clamping device, a cylinder clamping device, an oil cylinder clamping device, or a motor-controlled rotating screw clamping device.

[0019] The scheme is further as follows: the lifting mechanism includes slide rail seats fixedly arranged on the frame at both ends of the forward transfer rubber roller and the reverse transfer rubber roller, the slide rail seats are provided with guide grooves, and sliders are slidably arranged in the guide grooves. The shaft heads at both ends of the forward transfer rubber roller and the reverse transfer rubber roller are rotatably connected and fixed to the sliders through bearings, nut holes are provided on the sliders, and a lead screw is screwed into the nut holes. The lead screw is driven to rotate by a servo motor, and the rotating lead screw drives the forward transfer rubber roller and the reverse transfer rubber roller to move up and down along the guide grooves through the nut and the slider, and adjusts the distance between the forward transfer rubber roller and the reverse transfer rubber roller and the forward glue-coated steel roller and the reverse glue-coated steel roller.

[0020] The solution is further as follows: the sealing plate is a polytetrafluoroethylene plate, including an inner plate and an outer plate, and the inner and outer plates are respectively connected to a clamping plate with a handle, and the clamping plate is respectively provided with a clamping groove at both ends of the handle, and the clamping groove is used to clamp the inner plate and the outer plate at the two ends between the forward glue-coated steel roller and the reverse glue-coated steel roller, and the lower end surfaces of the inner plate and the outer plate are arc surfaces corresponding to the glue-coated steel roller, and the arc surfaces are pressed against the glue-coated steel roller, wherein: the inner plate is used to control the glue coating width, and the outer plate is clamped on the step end surface provided at the end of the glue-coated steel roller to seal the resin overflowing from the inner plate.

[0021] The beneficial effects of the utility model are:

[0022] 1. One adhesive tank can take into account both the forward coating and reverse coating functions, and can adapt to a wide range of resin matrix viscosity; it can take into account the preparation of low-weight, medium-weight and high-weight adhesive films;

[0023] 2. Two rubbers and two steel rollers of the glue coating machine are used to form two coating processes: forward coating and reverse coating. The glue coating machine has only one glue tank for forward coating and reverse coating, which is convenient for the conversion of forward coating and reverse coating processes. It is particularly suitable for the installation of online glue melting system and is easier to operate;

[0024] 3. Two rubber rollers are used, one for forward coating and one for reverse coating. The rubber rollers only need to move up and down. Compared with the traditional structure where one rubber roller needs to move left and right and up and down for forward and reverse coating, the parallelism accuracy of the rubber roller and the rubber roller is improved;

[0025] 4. Due to the physical properties of forward coating and reverse coating, the diameter of the reverse coating rubber roller should be smaller, and the diameter of the forward coating rubber roller should be larger. Using two rubber rollers with different diameters can optimize the selection of the rubber roller diameter and improve the coating accuracy of reverse coating and forward coating;

[0026] 5. The diameter of the reverse-coating rubber roller is reduced, which can reduce the contact area between the transfer film and the coating roller, so as to improve the coating accuracy and prepare a low-surface-density film. Add a supporting steel roller at the bottom of the reverse-coating rubber roller to make up for the lack of rigidity of the rubber roller and solve the problem of uneven lateral coating, resulting in high glue content in the middle and low glue content on both sides;

[0027] 6. The specially designed clamping device avoids the possible up and down jumping of the mobile steel roller caused by the moving guide rail during the coating process, ensuring the coating accuracy of the mobile glue coating steel roller;

[0028] 7. The two steel rollers are innovatively driven by gears and the two rubber rollers are rotated by universal joints, which improves the transmission stability of the steel rollers and rubber rollers and improves the coating accuracy.

[0029] The utility model is described in detail below in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall perspective structure of the utility model coating device;

[0031] Figure 2 It is a schematic diagram of the cross-sectional structure of a utility model coating device;

[0032] Figure 3 It is a schematic diagram of the cross-sectional structure of the axial side clamping device of the utility model coating device;

[0033] Figure 4 It is a schematic diagram of the gear transmission mechanism of two glue-coated steel rollers of the utility model;

[0034] Figure 5 It is a schematic diagram of a utility model cross universal coupling transmission mechanism of two resin transfer rubber rollers;

[0035] Figure 6 It is a schematic diagram of the structure of the utility model transverse transmission mechanism;

[0036] Figure 7 This is a schematic diagram of the structure of the two resin transfer roller lifting mechanism of the utility model;

[0037] Figure 8 It is a schematic diagram of the structure of a utility model glue tank. DETAILED DESCRIPTION

[0038] A five-roller coating device for both forward coating and reverse coating processes, such as Figures 1 to 8As shown, the coating device includes a glue-coating steel roller 1, a resin transfer rubber roller 2, a glue tank 3 and a frame 4. The frame is divided into two connected parts, one part is a drive module 401 for fixing and supporting the drive system, and the other part includes two parallel support plates 402 for supporting and connecting the glue-coating steel roller 1 and the resin transfer rubber roller 2 and their supporting systems, wherein: the glue tank 3 is a glue tank shared by two processes, the glue-coating steel roller 1 is two steel rollers with the same diameter, namely a forward glue-coating steel roller 101 and a reverse glue-coating steel roller 102; the resin transfer rubber roller 2 is two, namely a forward transfer rubber roller 201 and a reverse transfer rubber roller 202; the reverse transfer rubber roller 2 The diameter of 02 is smaller than the diameter of the forward transfer rubber roller 201, wherein: the diameter of the forward glue-coating steel roller 101 is the same as that of the forward transfer rubber roller 201, and the diameter of the reverse transfer rubber roller 202 is one-half to two-thirds of the diameter of the reverse glue-coating steel roller 102; the forward transfer rubber roller 201 and the reverse transfer rubber roller 202 are placed under the forward glue-coating steel roller 101 and the reverse glue-coating steel roller 102, the forward transfer rubber roller 201 is arranged relative to the forward glue-coating steel roller 101, and the reverse transfer rubber roller 202 is arranged relative to the reverse glue-coating steel roller 102, and a supporting steel roller 10 is closely arranged under the reverse transfer rubber roller, and the forward glue-coating steel roller 101 The reverse glue coating steel roller 102, the forward transfer rubber roller 201, the reverse transfer rubber roller 202 and the supporting steel roller 10 form five rollers of the device; the forward glue coating steel roller 101, the reverse glue coating steel roller 102, the forward transfer rubber roller 201 and the reverse transfer rubber roller 202 are respectively driven to rotate by a motor 5, the motor 5 includes two steel roller driving motors 501 and two rubber roller driving motors 502, a transverse transmission mechanism 6 adjusts the relative distance between the forward glue coating steel roller 101 and the reverse glue coating steel roller 102 to control the outflow of the glue liquid, the forward transfer rubber roller 201 and the reverse transfer rubber roller 202 are respectively connected to a lifting mechanism 7, The distance between the forward transfer rubber roller 201 and the reverse transfer rubber roller 202 and the forward glue coating steel roller 101 and the reverse glue coating steel roller 102 is adjusted by the lifting mechanism 7, and the two ends between the forward glue coating steel roller 101 and the reverse glue coating steel roller 102 are provided with sealing plates 8 to form the common glue groove 3; according to the above structure, the forward glue coating steel roller 101 and the reverse glue coating steel roller 102 are respectively interchanged in the working state of forward glue coating and reverse glue coating, and the working state of the forward transfer rubber roller 201 and the reverse transfer rubber roller 202 are interchanged accordingly, so that the interchange of the two processes of forward coating and reverse coating under one common glue groove is formed under one frame.

[0039] The working state is interchangeable as Figure 2As shown, when the forward glue coating steel roller 101 and the forward transfer glue roller 201 are in the structural state on the left, the reverse transfer glue roller 202 is controlled to separate from the reverse glue coating steel roller 102, and the forward transfer glue roller 201 is controlled to lift and approach the forward glue coating steel roller 101, and the forward glue coating steel roller 101 is controlled to rotate forward and the forward transfer glue roller 201 is controlled to rotate reversely and drive the attached release paper 9 to rotate and glue and then send it out in reverse. At the same time, the reverse glue coating steel roller 102 does not rotate as a metering roller; or they can be interchanged, The forward transfer glue roller 201 is controlled to separate from the forward glue coating steel roller 101, and the reverse glue coating steel roller 202 is controlled to be lifted close to the reverse glue coating steel roller 102, and the reverse glue coating steel roller 102 is controlled to rotate in the reverse direction, and the reverse transfer glue roller 202 rotates in the reverse direction and drives the attached release paper 9 to rotate and be glued and then sent out in the reverse direction. At the same time, the forward glue coating steel roller 101 rotates slowly or does not rotate as a metering roller, thereby forming an interchange of the forward coating and reverse coating processes under a common glue tank under one frame.

[0040] In actual operation: the diameters of the forward glue-coating steel roller 101 and the reverse glue-coating steel roller 102 are 300-450 mm, the diameter of the forward transfer rubber roller 201 is 300-400 mm, and the diameter of the reverse transfer rubber roller 202 is 200-250 mm.

[0041] In order to overcome the decrease in rigidity caused by the thinning of the reverse transfer rubber roller and improve the coating accuracy, a support steel roller 10 is provided under the reverse transfer rubber roller 202, close to the release paper that is passed around. The support steel roller 10 can be controlled to move up and down by the telescopic arm of the support cylinder 11 or the oil cylinder, and the diameter of the support steel roller 10 is equal to or greater than the diameter of the reverse transfer rubber roller 202.

[0042] In the embodiment, the forward glue coating steel roller and the reverse glue coating steel roller are driven to rotate by the steel roller driving motor 501 through the gear transmission mechanism 12. In which, since the forward transfer rubber roller 201 and the reverse transfer rubber roller 202 need to move up and down, and the driving motors driving them are fixed, Figure 6 As shown, in order to adapt to the up and down movement of the forward transfer rubber roller 201 and the reverse transfer rubber roller 202, the forward transfer rubber roller 201 and the reverse transfer rubber roller 202 are respectively connected to the rubber roller drive motor 502 through a connecting shaft 14 with a cross universal coupling 13 at both ends, and the rubber roller drive motor 502 drives the forward transfer rubber roller 201 and the reverse transfer rubber roller 202 to rotate through the cross universal coupling.

[0043] Of course, if the forward glue-coated steel roller and the reverse glue-coated steel roller move left and right, the structure can be reversed, the forward glue-coated steel roller and the reverse glue-coated steel roller are driven to rotate through the cross universal joint respectively, and the forward transfer rubber roller and the reverse transfer rubber roller are driven to rotate through the gear transmission mechanism respectively.

[0044] In the embodiment: Figure 3 and Figure 6 As shown, the transverse transmission mechanism 6 includes a horizontally arranged screw shaft 601, which is driven to rotate by a servo motor 602. The rotating shafts at both ends of the two steel rollers 101 and 102 are respectively fixed and rotated by bearings, wherein the bearing of one steel roller (such as the reverse glue-coating steel roller 102 in this embodiment) is positioned and fixed on the horizontal and vertical beams 401 of the frame 4 through a bearing seat 603, and the bearing of the other steel roller (such as the forward glue-coating steel roller 101 in this embodiment) is positioned and fixed on the horizontal and vertical beams 401 of the frame 4 through a bearing seat 604. Located on the lower horizontal slide rail 605, the screw shaft 601 is threadedly connected to the threaded hole set in the bearing seat 604 of another steel roller, and the servo motor 602 drives the screw shaft 601 to rotate. The rotating screw shaft 601 drives the bearing seat 604 of another steel roller to move along the lower horizontal slide rail 605 through the thread, thereby realizing the adjustment of the spacing distance between the two steel rollers 101 and 102, wherein the other steel roller is the forward glue-coated steel roller 101, and can also be the reverse glue-coated steel roller 102.

[0045] In order to eliminate the gap fluctuation caused by the bearing seat 604 of the other steel roller moving along the lower horizontal slide rail 605, the accuracy of adjusting the distance can be improved: Figure 3 As shown, the upper end surface of the bearing seat 604 of the other steel roller is fixedly provided with an upper horizontal slide rail 606, and a slide block 607 is provided on the upper horizontal slide rail 606. The upper horizontal slide rail 606 can slide along the slide limit of the slide block 607, and a clamping device 608 is provided on the top end surface of the slide block 607. The slide block 607 is connected and fixed to the clamping device 608, and the clamping device 608 is fixedly connected to the support plate 402 of the frame 4. The clamping device 608 reduces and stabilizes the sliding gap between the bearing seat 604 of the other steel roller and the lower horizontal slide rail 605 through the slide block 607, thereby improving the distance adjustment accuracy between the two steel rollers 101 and 102; wherein: the clamping device 608 is a spring clamping device, a cylinder clamping device using a pneumatic telescopic arm, an oil cylinder clamping device, and a motor-controlled rotating screw clamping device. Since the bearing seat 604 of the other steel roller is in dynamic adjustment, under this structure, the gear transmission mechanism 1201 of the other steel roller needs to be adjusted quickly. Figure 4As shown, the gear transmission of the other steel roller includes a driving gear 1201-1 and a driven gear 1201-2, and the driving gear 1201-1 and the driven gear 1201-2 are transmitted to rotate via an intermediate wheel 1201-3, the intermediate wheel 1201-3 is positioned on a first rotating plate 1201-4, and the driven gear 1201-2 is positioned on a second rotating plate 1201-5, and the first rotating plate 1201-4 is sleeved on the output shaft of the steel roller driving motor 501 of the other steel roller, and the intermediate wheel 1201-3 is positioned on a first rotating plate 1201-4, and the driven gear 1201-2 is positioned on a second rotating plate 1201-5. The second rotating plate 1201-5 is sleeved on the positioning shaft of the intermediate wheel 1201-3; when adjusting the horizontal movement of the bearing seat 604 of the other steel roller, the first rotating plate 1201-4 and the second rotating plate 1201-5 swing accordingly to ensure the horizontal movement of the bearing seat 604 of the other steel roller; the motor is driven by a gear transmission through a reducer. In order to increase the reliability of the transmission torque and transmission force, a transition shaft, the bearing seats 603, 604 and the transmission shaft are added between the reducer and the gear transmission.

[0046] In the embodiment: the lifting mechanism 7 is as follows: Figure 7 As shown, it includes a slide rail seat 701 fixedly arranged on the frame at both ends of the forward transfer rubber roller 201 and the reverse transfer rubber roller 202, a guide groove 702 is arranged on the slide rail seat, and a slider 703 is slidably arranged in the guide groove 702. The shaft heads at both ends of the forward transfer rubber roller 201 and the reverse transfer rubber roller 202 are rotatably connected and fixed to the slider 703 through bearings, and the bearings are covered by bearing covers 704. A nut hole is arranged on the slider 703, and a screw rod 705 is screwed into the nut hole. The screw rod 705 is driven to rotate by a cylinder 706 or a servo motor 706. The rotating screw rod 705 drives the forward transfer rubber roller 201 and the reverse transfer rubber roller 202 to move up and down along the guide groove 702 through the nut hole and the slider 703, and adjusts the distance between the forward transfer rubber roller 201 and the reverse transfer rubber roller 202 and the forward glue-coated steel roller 101 and the reverse glue-coated steel roller 102.

[0047] In the embodiment: Figure 8 As shown, the blocking plate 8 is a polytetrafluoroethylene plate, including an inner plate 801 and an outer plate 802, and a locking plate 804 with a handle 803 is respectively connected to the inner and outer plates 801 and 802, and the locking plate 804 is respectively provided with a clamping groove 805 at both sides of the handle 803, and the clamping groove 803 is used to clamp the inner plate and the outer plate at the two ends between the forward glue-coated steel roller 101 and the reverse glue-coated steel roller 102, and the lower end surfaces of the inner plate 801 and the outer plate 802 are arc surfaces 804 corresponding to the glue-coated steel roller, and the arc surface 804 is on the glue-coated steel roller, wherein: the inner plate 801 is used to control the glue coating width, and the outer plate 802 is clamped on the step end surface set at the end of the glue-coated steel roller to block the resin overflowing from the inner plate 801 to prevent the resin from flowing to the shaft head; the resin between the inner and outer plates can be manually scraped off by workers using tools.

[0048] The above-mentioned five-roller coating device for both forward coating and reverse coating processes can take into account both forward coating and reverse coating functions by using one glue tank, and can adapt to a wide range of resin matrix viscosity; it can take into account the preparation of low-weight, medium- and high-weight adhesive films; the designed clamping device avoids the possible up and down jumping of the moving steel roller caused by the moving guide rail during the coating process, thereby ensuring the coating accuracy of the moving glue-coating steel roller.

Claims

1. A five-roller coating device for both forward coating and reverse coating processes, comprising a glue coating steel roller, a resin transfer rubber roller, a glue tank and a frame, wherein the glue coating steel roller and the resin transfer rubber roller are mounted on the frame, characterized in that: The glue tank is a common glue tank for two processes, the glue-coating steel rollers are two steel rollers with the same diameter, namely a forward glue-coating steel roller and a reverse glue-coating steel roller; there are two resin transfer rubber rollers, namely a forward transfer rubber roller and a reverse transfer rubber roller; the diameter of the reverse transfer rubber roller is smaller than the diameter of the forward transfer rubber roller, the forward transfer rubber roller and the reverse transfer rubber roller are placed under the forward glue-coating steel roller and the reverse glue-coating steel roller, the forward transfer rubber roller is arranged relative to the forward glue-coating steel roller, the reverse transfer rubber roller is arranged relative to the reverse glue-coating steel roller, a supporting steel roller is closely arranged under the reverse transfer rubber roller, the forward glue-coating steel roller and the reverse glue-coating steel roller as well as the forward transfer rubber roller and the reverse transfer rubber roller are driven by motors respectively Rotate, a transverse transmission mechanism adjusts the relative distance between the forward glue coating steel roller and the reverse glue coating steel roller, the forward transfer glue roller and the reverse transfer glue roller are respectively connected with a lifting mechanism, the lifting mechanism is used to adjust the distance between the forward transfer glue roller and the reverse transfer glue roller and the forward glue coating steel roller and the reverse glue coating steel roller, and the common glue groove is formed by setting sealing plates at both ends between the forward glue coating steel roller and the reverse glue coating steel roller; the forward glue coating steel roller and the reverse glue coating steel roller are respectively interchanged in the working state of forward glue coating and reverse glue coating, and the working state of the forward transfer glue roller and the reverse transfer glue roller are interchanged accordingly, so that the interchange of the two processes of forward coating and reverse coating is formed under a common glue groove.

2. The coating device according to claim 1, characterized in that: The diameter of the forward glue coating steel roller is the same as that of the forward transfer rubber roller, and the diameter of the reverse transfer rubber roller is one half to two thirds of the diameter of the reverse glue coating steel roller.

3. The coating device according to claim 1 or 2, characterized in that: The supporting steel roller can be controlled to move up and down through a telescopic arm, and the diameter of the supporting steel roller is equal to or greater than the diameter of the reverse transfer rubber roller.

4. The coating device according to claim 1, characterized in that: The forward glue coating steel roller and the reverse glue coating steel roller are respectively driven to rotate by a motor through a gear transmission mechanism, and the forward transfer rubber roller and the reverse transfer rubber roller are respectively driven to rotate by a motor through a cross universal coupling.

5. The coating device according to claim 1, characterized in that: The transverse transmission mechanism includes a horizontally arranged screw shaft, which is driven to rotate by a servo motor. The rotating shafts at both ends of the two steel rollers are respectively fixed and rotated by bearings, wherein the bearing of one steel roller is positioned and fixed on the frame through a bearing seat, and the bearing of the other steel roller is positioned on the lower horizontal slide rail through a bearing seat. The screw shaft is threadedly connected to the threaded hole set in the bearing seat of the other steel roller. The servo motor drives the screw shaft to rotate, and the rotating screw shaft drives the bearing seat of the other steel roller to move along the lower horizontal slide rail through the thread, thereby realizing the adjustment of the spacing distance between the two steel rollers.

6. The coating device according to claim 5, characterized in that: The gear transmission of the other steel roller includes a driving gear and a driven gear, and the driving gear and the driven gear transmit rotation through an intermediate wheel. The intermediate wheel is positioned on a first rotating plate, and the driven gear is positioned on a second rotating plate. The first rotating plate is sleeved on an output shaft of a steel roller driving motor of the other steel roller, and the second rotating plate is sleeved on a positioning shaft of the intermediate wheel. When adjusting the horizontal movement of the bearing seat of the other steel roller, the first rotating plate and the second rotating plate swing accordingly to ensure the horizontal movement of the bearing seat of the other steel roller.

7. The coating device according to claim 5 or 6, characterized in that: The upper end surface of the bearing seat of the other steel roller is fixedly provided with an upper horizontal slide rail, and a slide block is provided on the upper horizontal slide rail. The upper horizontal slide rail can slide along the slide limit of the slide block. A clamping device is provided on the top surface of the slide block. The clamping device is fixedly connected to the frame. The elastic clamping device reduces and stabilizes the sliding gap between the bearing seat of the other steel roller and the lower horizontal slide rail through the slide block, thereby improving the distance adjustment accuracy between the two steel rollers.

8. The coating device according to claim 7, characterized in that: The clamping device is a spring clamping device, a cylinder clamping device, an oil cylinder clamping device, or a motor-controlled rotating lead screw clamping device.

9. The coating device according to claim 1, characterized in that: The lifting mechanism includes a slide rail seat fixedly arranged on the frame at both ends of the forward transfer rubber roller and the reverse transfer rubber roller, the slide rail seat is provided with a guide groove, a slider is slidably arranged in the guide groove, the shaft heads at both ends of the forward transfer rubber roller and the reverse transfer rubber roller are rotatably connected and fixed to the slider through bearings, a nut hole is provided on the slider, a lead screw is screwed into the nut hole, the lead screw is driven to rotate by a servo motor, and the rotating lead screw drives the forward transfer rubber roller and the reverse transfer rubber roller to move up and down along the guide groove through the nut and the slider, and adjusts the distance between the forward transfer rubber roller and the reverse transfer rubber roller and the forward glue-coated steel roller and the reverse glue-coated steel roller.

10. The coating device according to claim 1, characterized in that: The sealing plate is a polytetrafluoroethylene plate, including an inner plate and an outer plate, and the inner and outer plates are respectively connected to a clamping plate with a handle, and the clamping plate is respectively provided with a clamping groove at both ends of the handle, and the clamping groove is used to clamp the inner plate and the outer plate at the two ends between the forward glue-coated steel roller and the reverse glue-coated steel roller, and the lower end surfaces of the inner plate and the outer plate are arc surfaces corresponding to the glue-coated steel roller, and the arc surfaces are pressed against the glue-coated steel roller, wherein: the inner plate is used to control the glue coating width, and the outer plate is clamped on the step end surface set at the end of the glue-coated steel roller to seal the resin overflowing from the inner plate.

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