A multi-roll double-sided coating device

Abstract

The application provides a multi-roll double-sided coating device, which comprises a main box, a coating mechanism arranged on one side of the main box, a pay-off seat and a winding seat arranged on one side of the coating mechanism, and a roll changing mechanism arranged on the top of the pay-off seat. The roll changing mechanism comprises two groups of stands arranged on the pay-off seat, a material rack arranged on one side of each group of stands, an old roll and a new roll arranged between the two groups of material racks, and a roll changing assembly, a lifting assembly, a detection assembly, a lamination assembly, a new material stamping assembly and an old material stamping assembly arranged on the pay-off seat. The detection assembly is in contact with the old base material roll, and the T-shaped splicing and patching process of the new and old base material rolls is automatically triggered when the old base material roll is consumed, so that the manual operation is not affected, the deviation error is reduced, and the coating production efficiency is greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coating devices, in particular to a multi-roll double-sided coating device. BACKGROUND

[0002] The coating machine refers to a device that applies a layer of glue, paint or ink with specific functions on the substrate in roll form, and then dries and winds it up. It is mainly used in the production of surface coating process of films, paper and other materials.

[0003] Chinese patent application CN201910889509.9 discloses a multi-roll double-sided coating machine, which includes a base, a first trough, a second trough, a storage roller, a front feeding roller, a back feeding roller, and five transfer rollers arranged between the storage roller, the front feeding roller, and the back feeding roller. The front feeding roller and the three transfer rollers adjacent to the back feeding roller are connected to the respective oil cylinder transmission devices. The storage roller, the front feeding roller, the back feeding roller, and the five transfer rollers are connected through universal couplings. The transfer roller in contact with the storage roller is placed in the first trough, and the other transfer roller in contact with the storage roller is placed in the second trough. This multi-roll double-sided coating head can complete the coating of both sides of the substrate in one coating mechanism, reducing energy consumption and waste, and saving cost and improving efficiency. The coating is uniform, and the machine runs smoothly.

[0004] However, this technical solution has some drawbacks when in use. Typically, when a roll of substrate is coated, manual loading of a new roll of substrate is required, and the machine needs to be stopped to re-wind the substrate after loading, which can increase substrate loss and cause the substrate to deviate or even cause the substrate to be damaged, further affecting the overall operation of the device. SUMMARY

[0005] The present application aims to overcome the shortcomings of the prior art and provides a multi-roll double-sided coating device that automatically changes the roll through a roll changing mechanism in cooperation with a coating mechanism to solve the problem of difficult roll changing.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0007] A multi-roll double-sided coating device includes a main box, a coating mechanism arranged on one side of the main box, a roll unwinding seat and a roll winding seat arranged on one side of the main box, a roll changing mechanism arranged on the top of the roll unwinding seat, two groups of stands arranged on the roll unwinding seat, a material rack arranged on one side of each group of stands, an old roll and a new roll arranged between the two groups of material racks, a roll changing assembly, a lifting assembly, a detection assembly, a fitting assembly, a new material stamping assembly, and an old material stamping assembly arranged on the roll unwinding seat.

[0008] The coating mechanism further comprises a coating roller a provided on the unwinding seat, a coating part a provided below the coating roller a, a coating roller b provided on the winding seat, a coating part b provided below the coating roller b, a plurality of drying rollers provided on one side of the main box, and a winding roller provided on the winding seat, and the winding roller is wound with the substrate between the winding roller and the plurality of roller bodies.

[0009] The roll changing assembly comprises a servo motor provided on the rack, a gear a provided on one end of an output shaft of the servo motor, two groups of bearings respectively installed on two ends of the old roll and the new roll, a lifting groove provided on the rack, two groups of gears b respectively installed on two ends of the old roll and the new roll, a gear c movably connected to the rack, an electromagnetic seat installed on a top end of the rack, and an arc-shaped electromagnetic sheet embedded in a top end of the lifting groove.

[0010] The lifting assembly comprises a bottom plate provided below the unwinding seat, a cushion block movably connected to the bottom plate, a hydraulic device installed below the bottom plate, two groups of guide rods fixedly connected to the bottom plate, a guide plate provided at a tail end of the unwinding seat, and a plurality of rollers movably connected to the guide plate.

[0011] The detection assembly comprises a fixed tube fixedly connected to an inner side of the rack, a support plate provided below the fixed tube, two groups of spring rods provided on the support plate, a spring a provided outside the spring rods, a sliding ring movably connected to the fixed tube, an inner rod fixedly connected to a lower end of the sliding ring, a pin head provided at a bottom end of the inner rod, a pin seat provided below the pin head, a pin shaft provided on both sides of the pin head, and a plurality of sliding grooves provided outside the fixed tube.

[0012] The detection assembly further comprises an assembly plate fixedly connected to one side of the sliding ring, a wheel seat installed below the assembly plate, a roller a provided below the wheel seat, a damping sleeve provided outside the roller a, and a worm provided at one end of the roller a.

[0013] The detection assembly further comprises a roller b installed at a lower end of an inner side of the rack, a belt wheel a provided at one end of the roller b, a rotating shaft a movably connected to an outer side of the rack, a worm wheel provided at one end of the rotating shaft a, a driving bevel gear provided at the other end of the rotating shaft a, a connecting rod fixedly connected to the other side of the sliding ring, and a tension plate fixedly connected to a top end of the connecting rod.

[0014] The assembly comprises: a material head plate arranged below the new roll; two sets of the curved plates arranged at both ends of the material head plate; a support arranged below the curved plate; a base arranged below the support; a pin column arranged on the base; a pin rod arranged at the other end of the curved plate; a heat conduction plate arranged at one end of the material head plate; a negative pressure groove arranged above the heat conduction plate; a resistance tube arranged below the heat conduction plate; and two sets of the telescopic rods arranged on the material head plate.

[0015] The new material stamping assembly comprises: a top seat a arranged on the unwinding seat; a double-action die arranged below the top seat a; a ring-shaped blade arranged below the double-action die; a hydraulic cylinder a arranged on the top seat a; a T-shaped bottom die arranged below the double-action die; a T-shaped groove a arranged on the double-action die; and a cross beam arranged between the double-action dies.

[0016] The old material stamping assembly comprises: a top seat b arranged on the stand; a T-shaped electric heating movable die arranged below the top seat b; a square bottom die arranged below the T-shaped electric heating movable die; a T-shaped groove b arranged on the square bottom die; a bottom groove arranged below the square bottom die; an extrusion groove arranged on the inner wall of the T-shaped groove b; a hydraulic cylinder b arranged on the top seat b; two sets of the lead screws arranged on both sides of the top seat b; a nut threadedly connected to the lead screws; a sliding rod arranged on one side of the lead screw; a rotating shaft b arranged at the bottom end of the lead screw; a driven bevel gear arranged at one end of the rotating shaft b; a belt pulley b arranged at the other end of the rotating shaft b; and a belt arranged on the belt pulley b.

[0017] The present application has the following advantages:

[0018] (1) The present application detects the contact between the detection assembly and the old base material roll, automatically triggers the splicing of the new and old base material rolls and the tab operation when the old base material roll is consumed, does not affect the manual operation, reduces the deviation error, and greatly improves the coating production efficiency.

[0019] (2) The present application punches the material head and tail of the new and old material rolls by the stamping assembly, forms a T-shaped head at the material head, and forms a T-shaped groove at the material tail, improves the connection effect through the splicing of the T-shaped structure, melts the T-shaped splicing part through the resistance structure, improves the splicing effect, and the splicing method is different from the traditional overlapping gluing process, so that the thickness of the base material after splicing changes very little, reduces the influence of the overlapping thickness change on the subsequent traction coating, and the splicing effect is better than the gluing.

[0020] (3) the present application through the hydraulic structure does power lifting new base material roll and trigger power input, and through the electromagnetic structure to the adsorption of bearing fixed in not influence the roll rotation unwinding while ensuring the fixed effect, thereby greatly improving the device roll efficiency.

[0021] To sum up, the present application has the advantages of automatic high efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is the whole structure schematic diagram of the present application;

[0023] Figure 2 is the side structure schematic diagram of the present application;

[0024] Figure 3 is the coating mechanism structure schematic diagram of the present application;

[0025] Figure 4 is the unwinding seat front structure schematic diagram of the present application;

[0026] Figure 5 is the unwinding seat side structure schematic diagram of the present application;

[0027] Figure 6 is the local top view structure schematic diagram of the present application roll changing mechanism;

[0028] Figure 7 is the local front view structure schematic diagram of the present application roll changing mechanism;

[0029] Figure 8 is the whole structure schematic diagram of the present application roll changing assembly;

[0030] Figure 9 is the split structure schematic diagram of the present application roll changing assembly;

[0031] Figure 10 is the lifting assembly structure schematic diagram of the present application;

[0032] Figure 11 is the whole structure schematic diagram of the present application detection assembly;

[0033] Figure 12 is the local structure schematic diagram of the present application detection assembly;

[0034] Figure 13 is the local split structure schematic diagram of the present application detection assembly;

[0035] Figure 14 is the whole structure schematic diagram of the present application fitting assembly;

[0036] Figure 15 is the local structure schematic diagram of the present application fitting assembly;

[0037] Figure 16Structure diagram of transmission component of the present application;

[0038] Figure 17 Structure diagram of overall structure of new material stamping assembly of the present application;

[0039] Figure 18 Structure diagram of bottom view of new material stamping assembly of the present application;

[0040] Figure 19 Structure diagram of overall structure of old material stamping assembly of the present application;

[0041] Figure 20 Structure diagram of partial bottom view of old material stamping assembly of the present application;

[0042] Figure 21 Structure diagram of lifting component of old material stamping assembly of the present application;

[0043] Figure 22 Structure diagram of overall structure of new and old assembly splicing of the present application;

[0044] Figure 23 Structure diagram of partial structure of new and old assembly splicing of the present application;

[0045] Figure 24 Effect picture of T-shaped splicing of base material of the present application.

[0046] The reference signs of the present application are as follows: 1, main box; 2, coating mechanism; 201, unwinding seat; 202, winding seat; 203, coating roller a; 204, coating part a; 205, coating roller b; 206, coating part b; 207, drying roller; 208, winding roller; 209, base material; 3, roll changing mechanism; 301, stand; 302, material rack; 303, old roll; 304, new roll; 31, roll changing assembly; 311, servo motor; 312, gear a; 313, bearing; 314, lifting groove; 315, gear b; 316, gear c; 317, electromagnetic seat; 318, arc-shaped electromagnetic sheet; 32, lifting assembly; 321, bottom plate; 322, cushion block; 323, hydraulic device; 324, guide rod; 325, guide plate; 326, roller; 33, detection assembly; 331, fixed tube; 332, support plate; 3321, spring rod; 3322, spring a; 333, sliding ring; 3331, inner rod; 3332, pin head; 3333, pin seat; 3334, pin shaft; 334, sliding groove; 335, assembly plate; 336, wheel seat; 3361, roller a; 3362, damping sleeve; 3363, worm; 3364, roller b; 3365, pulley a; 3366, rotating shaft a; 3367, worm wheel; 3368, driving bevel gear; 337, connecting rod; 338, tension plate; 34, fitting assembly; 341, material head plate; 342, warped plate; 3421, support seat; 3422, base; 3423, pin column; 343, pin rod; 344, heat-conducting plate; 345, negative pressure groove; 346, resistance tube; 347, telescopic rod; 35, new material stamping assembly; 351, top seat a; 352, double-action die; 353, annular blade; 354, hydraulic cylinder a; 355, T-shaped bottom die; 356, T-shaped groove a; 357, cross beam; 36, old material stamping assembly; 361, top seat b; 362, T-shaped electrically heated movable die; 363, square bottom die; 3631, T-shaped groove b; 3632, bottom groove; 3633, extrusion groove; 364, hydraulic cylinder b; 365, screw rod; 3651, nut; 3652, sliding rod; 366, rotating shaft b; 3661, driven bevel gear; 3662, pulley b; 3663, belt. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0048] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0049] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0050] Example 1: As Figures 1-24 As shown, this embodiment provides a multi-roller double-sided coating device, including a main unit 1 and a coating mechanism 2 disposed on one side of the main unit 1. The coating mechanism 2 includes an unwinding seat 201 and a rewinding seat 202 disposed on one side of the main unit 1. A roll changing mechanism 3 is disposed on the top of the unwinding seat 201. The roll changing mechanism 3 includes two sets of uprights 301 disposed on the unwinding seat 201. A material rack 302 is disposed on one side of each of the two sets of uprights 301. An old roll 303 and a new roll 304 are disposed between the two sets of material racks 302. The roll changing mechanism 3 also includes a roll changing component 31, a lifting component 32, a detection component 33, a bonding component 34, a new material stamping component 35, and an old material stamping component 36 disposed on the unwinding seat 201.

[0051] The roll changing assembly 31 includes: a servo motor 311, which is mounted on the material rack 302; a gear a 312, which is located at one end of the output shaft of the servo motor 311; bearings 313, with two sets of bearings 313 respectively mounted at both ends of the old roll 303 and the new roll 304; a lifting groove 314, which is opened on the material rack 302; gears b 315, with two sets of gears b 315 respectively mounted at both ends of the old roll 303 and the new roll 304; gear c 316, which is movably connected to the material rack 302; an electromagnetic base 317, which is mounted on the top of the material rack 302; and an arc-shaped electromagnetic plate 318, which is embedded in the top of the lifting groove 314.

[0052] In this embodiment, the servo motor 311 is powered to drive the gear a 312 to rotate, the gear b 315 and the gear c 316 are engaged with the gear a 312, so that the new roll 304 can be driven to complete the unwinding when it rises to the designated position at the top of the rack 302; the electromagnetic seat 317 is powered to give the arc-shaped electromagnetic sheet 318 a magnetic force, which contacts the bearing 313 of metal material through the magnetic force, so that the roll body can be fixed while the unwinding is not affected.

[0053] The lifting assembly 32 comprises a bottom plate 321 arranged below the unwinding seat 201, a cushion block 322 movably connected to the bottom plate 321, a hydraulic device 323 installed below the bottom plate 321, two groups of guide rods 324 fixedly connected to the bottom plate 321, a guide plate 325 arranged at the tail end of the unwinding seat 201, and a plurality of groups of rollers 326 movably connected to the guide plate 325.

[0054] In this embodiment, the hydraulic device 323 is started to drive the cushion block 322 to rise and fall through the output rod, so as to realize the lifting of the new base material 209 roll, and the plurality of groups of rollers 326 on the guide plate 325 facilitate the feeding and moving of the base material 209 roll.

[0055] The detection assembly 33 comprises a fixed pipe 331 fixedly connected to the inner side of the rack 302, a support plate 332 arranged below the fixed pipe 331, two groups of spring rods 3321 arranged on the support plate 332, a spring a 3322 arranged outside the spring rod 3321, a slip ring 333 movably connected to the fixed pipe 331, an inner rod 3331 fixedly connected to the slip ring 333, a pin head 3332 arranged at the bottom end of the inner rod 3331, a pin seat 3333 arranged below the pin head 3332, a pin shaft 3334 arranged on both sides of the pin head 3332, and a plurality of groups of sliding grooves 334 arranged outside the fixed pipe 331.

[0056] The detection assembly 33 further comprises an assembly plate 335 fixedly connected to one side of the slip ring 333, a wheel seat 336 installed below the assembly plate 335, a roller a 3361 arranged below the wheel seat 336, a damping sleeve 3362 arranged outside the roller a 3361, and a worm 3363 arranged at one end of the roller a 3361.

[0057] The detection assembly 33 further comprises a roller b3364 installed at the lower end of the inner side of the rack 302, a belt wheel a3365 arranged at one end of the roller b3364, a rotating shaft a3366 movably connected to the outer side of the rack 302, a worm wheel 3367 arranged at one end of the rotating shaft a3366, a driving bevel gear 3368 arranged at the other end of the rotating shaft a3366, a connecting rod 337 fixedly connected to the other side of the sliding ring 333, and a tension plate 338 fixedly connected to the top end of the connecting rod 337.

[0058] In this embodiment, the tension plate 338 is arranged above the old roll 303 and is always in contact with the old base material 209 roll under the tension of the springs a3322 of the two groups of spring rods 3321. The tension plate 338 will gradually descend following the coating consumption position of the base material 209, and the descending is driven by the sliding ring 333 to drive the roller a3361 to descend. When the old roll 303 is coated, the roller a3361 is in contact with the roller b3364, the roller b3364 is connected with the gear c316 through a transmission belt, so that the power of the servo motor 311 drives the roller a3361 to rotate through the friction of the two groups of rollers, and at the same time, when the roller a3361 descends to the bottom end, the worm 3363 is in contact with the worm wheel 3367 on the rotating shaft a3366, so that the rotating shaft a3366 can be driven to rotate.

[0059] The laminating assembly 34 comprises a material head plate 341 arranged below the new roll 304, two groups of warped plates 342 arranged at both ends of the material head plate 341, a support 3421 arranged below the warped plate 342, a base 3422 arranged below the support 3421, a pin column 3423 arranged on the base 3422, a pin rod 343 arranged at the other end of the warped plate 342, a heat conduction plate 344 arranged at one end of the material head plate 341, a negative pressure groove 345 arranged above the heat conduction plate 344, a resistance tube 346 arranged below the heat conduction plate 344, and two groups of telescopic rods 347 arranged on the material head plate 341.

[0060] In this embodiment, the sliding ring 333 descends to push one end of the warped plate 342 to sink, so that the other end of the warped plate 342 drives the material head plate 341 to rise through the pin rod 343, and further drives the side heat conduction plate 344 and the material head to rise to contact the material tail to complete the patch splicing through the negative pressure groove 345.

[0061] The new material stamping assembly 35 comprises a top seat a351 provided on the unwinding seat 201, a double-action die 352 provided below the top seat a351, a ring-shaped blade 353 provided below the double-action die 352, a hydraulic cylinder a354 provided on the top seat a351, a T-shaped bottom die 355 provided below the double-action die 352, a T-shaped groove a356 provided on the double-action die 352, and a cross beam 357 provided between the double-action die 352.

[0062] The old material stamping assembly 36 comprises a top seat b361 provided on the stand 301, a T-shaped electric heating movable die 362 provided below the top seat b361, a square bottom die 363 provided below the T-shaped electric heating movable die 362, a T-shaped groove b3631 provided on the square bottom die 363, a bottom groove 3632 provided below the square bottom die 363, an extrusion groove 3633 provided on the inner wall of the T-shaped groove b3631, a hydraulic cylinder b364 provided on the top seat b361, two groups of lead screws 365 provided on both sides of the top seat b361, a nut 3651 threadedly connected to the lead screw 365, a sliding rod 3652 provided on one side of the lead screw 365, a rotating shaft b366 provided at the bottom end of the lead screw 365, a driven bevel gear 3661 provided at one end of the rotating shaft b366, a belt pulley b3662 provided at the other end of the rotating shaft b366, and a belt 3663 provided on the belt pulley b3662.

[0063] In the embodiment, the double-action die 352 and the ring-shaped blade 353 are driven to descend by the hydraulic cylinder a354 and pass through the T-shaped bottom die 355 to stamp the new roll material head, so that a T-shaped structure is formed at the head end of the new roll material, the T-shaped electric heating movable die 362 is driven to descend by the hydraulic cylinder b364, the rotating shaft a3366 is rotated to drive the belt pulley b3662 to rotate through the meshing of the driving bevel gear 3368 and the driven bevel gear 3661, and the belt 3663 on the belt pulley b3662 is driven to the lead screw 365, the lead screw 365 is rotated to drive the square bottom die 363 to ascend to a specified position and contact the T-shaped electric heating movable die 362 to stamp the old roll material tail, so that a T-shaped groove is formed at the tail end of the old roll material and matches the head end of the new roll material, and the head plate 341 drives the new roll material head to ascend, so that the T-shaped head can enter the T-shaped tail groove for splicing, and the heat generated by the resistance structure in the T-shaped electric heating movable die 362 and the resistance tube 346 at the bottom of the heat conduction plate 344 melts and fixes the film material after splicing.

[0064] Embodiment two: as Figures 1-3As shown in the figure, the same or corresponding parts as in Example One are denoted by the same reference numerals as in Example One, and for the sake of brevity, only the differences from Example One will be described below. The difference between this Example Two and Example One is that:

[0065] The coating mechanism 2 further comprises a coating roller a 203 provided on the unwinding seat 201, a coating member a 204 is arranged below the coating roller a 203, a coating roller b 205 is arranged on the winding seat 202, a coating member b 206 is arranged below the coating roller b 205, a plurality of drying rollers 207 are arranged on one side of the main box 1, a winding roller 208 is arranged on the winding seat 202, and the winding roller 208 is wound with the substrate 209 between the plurality of roller bodies.

[0066] In this embodiment, the back surface of the substrate 209 is coated by guiding through the coating member a 204 via the coating roller a 203, and the front surface of the substrate 209 is coated by guiding through the coating member b 206 via the coating roller b 205, and after coating, drying is performed by resistance heating in the plurality of drying rollers 207.

[0067] Working steps

[0068] Step one, coating process: the back surface of the substrate 209 is coated by the coating roller a 203 and the coating member a 204, the front surface of the substrate 209 is coated by the coating roller b 205 and the coating member b 206, and after coating, drying is performed by resistance heating in the plurality of drying rollers 207, the old roll 303 is unwound, and the winding roller 208 is wound;

[0069] Step two, new roll stamping process: the new roll is placed on the cushion 322 by the feeding device, the new roll 304 is inserted through the new roll and into the rack 302, one end of the new roll material head is pulled to the edge of the T-shaped bottom die 355, and a small amount of length is reserved beyond the edge, the hydraulic cylinder a 354 drives the double-action die 352 and the annular blade 353 to descend and pass through the T-shaped bottom die 355 to stamp the new roll material head, so that the material head end forms a T-shaped structure, and during stamping, the excess material reserved at the bottom end is in a suspended state on the T-shaped bottom die 355, and is pressed by the upper beam 357 of the double-action die 352, and the material at this position will be bent downward along the edge of the T-shaped bottom die 355 to store the excess material;

[0070] The T-shaped material head formed by pulling and stamping the new roll is aligned on the heat-conducting plate 344 and is fixed by suction through the negative pressure groove 345;

[0071] Step three, detection process: the tension of the two groups of spring rods 3321 outside the spring a 3322 on the slip ring 333 makes the tension plate 338 always contact the old base material 209 roll, further follow the coating consumption of the base material 209, the position will gradually drop, when the old roll is consumed for one circle, the position of the tension plate 338 is just driven by the slip ring 333 to make the roller a 3361 drop and contact the roller b 3364, the roller b 3364 is connected with the gear c 316 through the transmission belt, so that the power of the servo motor 311 drives the roller a 3361 to rotate the worm 3363, at the same time, when it drops to the bottom, the worm 3363 contacts the worm gear 3367 on the shaft a 3366, so that the shaft a 3366 can be rotated, so that the old consumption can be mechanically detected, which is high in stability and sensitive in triggering;

[0072] Step four, old roll stamping process: when the base material 209 coating consumption on the old roll 303 is completed, the rotation of the shaft a 3366 drives the pulley b 3662 to rotate through the meshing of the driving bevel gear 3368 and the driven bevel gear 3661, and drives the screw rod 365 through the belt 3663 on the pulley b 3662, the rotation of the screw rod 365 drives the square bottom die 363 to rise to the specified position through the nut 3651 connection, reduces the abrasion of the square bottom die 363 during normal coating, and automatically reduces the manual operation steps;

[0073] The T-shaped electric heating die 362 driven by the hydraulic cylinder b 364 is lowered to contact the square bottom die 363 to stamp the old roll tail, so that a T-shaped groove is opened at the tail end to match the new roll head end;

[0074] Step five, patch splicing process: the slip ring 333 is lowered to push one end of the cantilever plate 342 to sink through the inner rod 3331, so that the other end of the cantilever plate 342 drives the material head plate 341 and the T-shaped new roll head fixed on the heat conduction plate 344 to rise through the guide of the telescopic rod 347, the heat conduction plate 344 will enter into the bottom groove 3632 below the square bottom die 363, the T-shaped head will enter into the T-shaped groove on the square bottom die 363 through the T-shaped groove b 3631, so as to complete the preliminary splicing of the new head and the old tail, and the reserved bending end on the side of the T-shaped head will be pressed into the splicing part;

[0075] Step six, melting process: the film material is melted by the heat generated by the extrusion of the T-shaped electrothermal dynamic die 362 and the heat conduction plate 344 on the upper part of the new and old T-shaped splicing, and the resistance structure in the T-shaped electrothermal dynamic die 362 and the resistance tube 346 at the bottom of the heat conduction plate 344. The splicing film melts and adheres together, and the excess material at the reserved bending end will flow along the T-shaped splicing and overflow from the extrusion groove 3633 when it is melted under pressure, thereby completing the splicing of the new and old material rolls. This splicing method does not overlap the new and old material rolls, reduces the influence on the coating head and tension adjusting mechanism when the coating is pulled after overlapping, and has better splicing firmness;

[0076] Step seven, roll changing and feeding process: after the splicing of the old roll 303 is completed, the old roll 303 is pulled out by the mechanical arm in the main box 1, and the cushion block 322 is lifted by the hydraulic device 323 to lift the new roll 304 and the spliced material roll to the top end of the material rack 302. During the lifting process, the travel switch triggers the electromagnetic seat 317 to be electrified, and the arc-shaped electromagnetic sheet 318 generates a magnetic force to contact the bearing 313 of metal material, which fixes the roll body without affecting the rotation and unwinding of the roll body.

[0077] When lifted to the top end, the gear b 315 is lifted to the meshing position of the gear a 312, and the new roll 304 is rotated to unwind by the servo motor 311, and at the same time, the winding end is driven to complete the winding around the roll and other operations by pulling the new material with the old material, thereby improving the production efficiency.

[0078] The above only describes the preferred embodiments of the present application and does not limit the present application. Any modification, equivalent replacement and improvement within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A multi-roller double-sided coating apparatus, comprising a main unit (1), characterized in that, Also includes: The coating mechanism (2) is located on one side of the main unit (1) and is used to coat the material on both sides. The roll changing mechanism (3) is located on one side of the main unit (1) and is used for automatic roll changing of material rolls; The coating mechanism (2) includes an unwinding seat (201) and a rewinding seat (202) located on one side of the main unit (1). The roll changing mechanism (3) includes two sets of uprights (301), a material rack (302), an old roll (303), and a new roll (304) mounted on the unwinding seat (201). The roll changing mechanism (3) also includes a roll changing component (31), a lifting component (32), a detection component (33), a bonding component (34), a new material stamping component (35), and a used material stamping component (36) disposed on the unwinding seat (201). The roll changing assembly (31) includes a servo motor (311), gear a (312), bearing (313), lifting groove (314), gear b (315), gear c (316), electromagnetic base (317), and arc-shaped electromagnetic plate (318) mounted on the material rack (302) for switching the positions of the new and old sets of material rolls and driving unwinding; the bonding assembly (34) includes a material head plate (341) and a rocker plate (342) mounted below the new roll (304) for pulling the ends of the new and old material rolls together. The components include: a support (3421), a base (3422), a pin (3423), a pin rod (343), a heat-conducting plate (344), a negative pressure groove (345), a resistance tube (346), and a telescopic rod (347); the new material stamping assembly (35) includes a top seat a (351), a double-moving die (352), an annular blade (353), a hydraulic cylinder a (354), a T-shaped bottom die (355), a T-shaped groove a (356), and a crossbeam (357) disposed on the unwinding seat (201) and used for stamping the tail of the new material.

2. The multi-roller double-sided coating apparatus according to claim 1, characterized in that, The lifting assembly (32) includes a base plate (321), a pad (322), a hydraulic device (323), a guide rod (324), a guide plate (325), and a roller (326) disposed under the unwinding seat (201) for lifting the new roll to the driving height.

3. The multi-roller double-sided coating apparatus according to claim 1, characterized in that, The detection component (33) includes a fixed tube (331), a support plate (332), a spring rod (3321), a spring a (3322), a slip ring (333), an inner rod (3331), a pin head (3332), a pin seat (3333), a pin shaft (3334), and a slide groove (334), which are disposed inside the material rack (302) and used to detect the thickness of the used material roll and trigger subsequent structures.

4. The multi-roller double-sided coating apparatus according to claim 3, characterized in that, The detection component (33) also includes an assembly plate (335), a wheel seat (336), a roller a (3361), a damping sleeve (3362), and a worm gear (3363) disposed on the slip ring (333) and used for driving triggering by changes in the thickness of the old material roll.

5. The multi-roller double-sided coating apparatus according to claim 1, characterized in that, The detection component (33) also includes a roller b (3364), a pulley a (3365), a rotating shaft a (3366), a worm gear (3367), a drive bevel gear (3368), a connecting rod (337), and a tension plate (338) located at the lower inner side of the material rack (302) for power transmission and driving.

6. The multi-roller double-sided coating apparatus according to claim 1, characterized in that, The old material stamping assembly (36) includes a top seat b (361), a T-shaped electric heating die (362), a square bottom die (363), a T-shaped groove b (3631), a bottom groove (3632), an extrusion groove (3633), and a hydraulic cylinder b (364) disposed on the stand (301) and used for stamping the tail of the old material.

7. A multi-roller double-sided coating apparatus according to claim 6, characterized in that, The old material stamping assembly (36) also includes a lead screw (365), a nut (3651), a slide bar (3652), a rotating shaft b (366), a driven bevel gear (3661), a pulley b (3662), and a belt (3663) located on both sides of the top seat b (361) for driving the stamping support structure to rise and fall.

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