Glue coating machine for producing thermal paper and use method thereof

Abstract

The invention discloses a glue coating machine for producing thermal paper and a method for using the same, and relates to the field of glue coating machines. The invention scrapes off excess glue on the surface of a glue coating roller through a blade at the bottom of a scraper, so that the glue is evenly distributed on the surface of the glue coating roller, thereby improving the gluing effect on the thermal paper, and the scraped glue falls downward into a glue tank below, which can realize automatic glue recovery and prevent glue waste. At the same time, during the glue coating process, a reciprocating drive component drives a scraper to reciprocate along the outer side surface of the blade at the bottom of the scraper, so that the glue adhered to the blade is scraped off by the scraper, and the glue is prevented from being dried and attached to the blade of the scraper to affect the normal use of the scraper. Through the cooperation of the reciprocating drive component, the scraper, the lifting component, the spring vibration component and the scraping strip, there is no glue residue in the entire scraping system, which can not only improve the scraping effect on the glue coating roller, but also make the subsequent cleaning and maintenance process of the scraping system more convenient.

Description

Technical Field

[0001] The invention belongs to the field of coating machines, and in particular relates to a glue coating machine for producing thermal paper and a use method thereof. Background Art

[0002] Thermal paper is a special consumable for digital integrated quick printing machines. It has the advantages of "high efficiency, convenience, environmental protection, and economy" and has broad market prospects. It is currently widely used in schools, government agencies, enterprises and institutions with large printing volumes. The manufacturing process of thermal paper is made up of gluing, laminating, drying, slitting and packaging.

[0003] In the prior art, the gluing process of thermal paper is mostly carried out by rolling glue with a glue roller. During the rolling glue application, the lower part of the glue roller is immersed in glue, and the glue roller continuously rotates to apply glue to the thermal paper. At the same time, a scraper is provided on one side of the glue roller to scrape off excess glue on the outer surface of the glue roller. However, the glue will adhere to the scraper during use. If it is not cleaned in time, the glue will dry and adhere to the scraper surface, thereby affecting the scraping effect of the scraper. Summary of the invention

[0004] In view of the problems in the related art, the present invention proposes a glue coating machine for producing thermal paper and a method of using the same to overcome the above technical problems existing in the existing related art.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The present invention is a glue coating machine for producing thermal paper, comprising a chassis and a glue coating mechanism installed inside the chassis, the glue coating mechanism comprising a glue tank, a scraper and a paper limiting assembly, a glue coating roller is rotatably installed above the glue tank, the bottom end of the glue coating roller is immersed in the glue tank, and the glue coating roller can rotate continuously under the drive of a driving member inside the chassis, the paper limiting assembly is installed above the glue coating roller and is used to limit the thermal paper so that the thermal paper can move through the top of the glue coating roller, the scraper is installed above the glue tank, and the bottom surface of the scraper is provided with a knife edge located on one side of the glue coating roller;

[0007] The chassis is also provided with a scraper cleaning mechanism for cleaning glue on the scraper, the scraper cleaning mechanism comprising a reciprocating drive assembly and a scraper, the reciprocating drive assembly can drive the scraper to move back and forth along the outer side surface of the blade at the bottom of the scraper to scrape off the glue adhering to the blade;

[0008] Both ends of the scraper are equipped with scraper strips for cleaning the glue scraping surface of the scraper. The scraper strips are installed on the end of the scraper through a lifting assembly and a spring vibration assembly. The lifting assembly can drive the scraper strip to move downward along one side of the scraper when the scraper moves to a position abutting the scraper strip, so as to scrape off the glue adhered to the scraper. The spring vibration assembly can drive the scraper strip to vibrate when the scraper strip is separated from the scraper, so as to vibrate and shake off the glue on the scraper strip.

[0009] Furthermore, the paper limiting assembly includes a limiting pressure roller, which is rotatably installed inside the chassis and located above the glue coating roller, and both ends of the limiting pressure roller are provided with guide rollers rotatably installed inside the chassis.

[0010] Furthermore, the glue coating mechanism also includes a support shaft and a hydraulic telescopic shaft, the support shaft is fixedly installed inside the chassis, both ends of the support shaft are rotatably mounted with brackets, and the two brackets are respectively fixedly installed at both ends of the scraper;

[0011] The top end of the hydraulic telescopic shaft is rotatably mounted on the inner wall of the chassis, and the telescopic end at the bottom of the hydraulic telescopic shaft is rotatably connected to the bracket.

[0012] Furthermore, the reciprocating drive assembly includes a reciprocating screw and a transmission unit. The reciprocating screw is rotatably installed between two brackets. A screw pair is threadedly installed on the reciprocating screw. One side of the screw pair slides against the outer side of the scraper. The scraper is fixedly installed at the bottom end of the screw pair. One end of the reciprocating screw is transmission-connected to the end of the glue coating roller through the transmission unit.

[0013] Furthermore, the transmission unit includes a main transmission wheel, a driving wheel and a driven wheel, the driving wheel is fixedly installed on the end of the glue coating roller, the main transmission wheel is rotatably installed on the end of the support shaft, the driving wheel and the main transmission wheel are connected by a primary transmission belt, a coaxially arranged secondary transmission wheel is fixedly installed on one side of the main transmission wheel, the driven wheel is fixedly installed on the end of the reciprocating screw rod, and the secondary transmission wheel and the driven wheel are connected by a secondary transmission belt.

[0014] Furthermore, the lifting assembly includes a positioning seat, which is fixedly installed on the inner side surface of the bracket, and a lifting wedge block is slidably installed inside the positioning seat. The top of the lifting wedge block is provided with an open groove for the reciprocating screw to pass through, and the bottom end of the lifting wedge block is abutted against a supporting spring, and a translation wedge block corresponding to the lifting wedge block is slidably installed on the inner side surface of the positioning seat, and one end of the translation wedge block slides and extends to the outside of the positioning seat.

[0015] Furthermore, a guiding inclined groove is opened at the lower part of the inner side surface of the positioning seat, a guide rail is fixedly installed on one side of the lower end of the lifting wedge block, a slider is slidably installed in the guide rail, a fixed shaft is fixedly installed on one side of the slider, and one end of the fixed shaft passes through the guiding inclined groove and extends to the outside of the positioning seat.

[0016] Furthermore, the spring vibration assembly includes a slide plate and a locking unit. The slide plate is slidably installed inside the fixed shaft, a return spring is abutted against the inner side surface of the slide plate, a telescopic shaft is fixedly installed on the outer end of the slide plate, and the scraper strip is fixedly installed on one end of the telescopic shaft. The locking unit is arranged at the upper end of the fixed shaft and can lock the slide plate in a limited position.

[0017] The locking plate is secured on a cam face and is adapted to engage the locking plate to engage with the locking plate, wherein the locking plate is secured on a cam face and is adapted to engage with the locking plate to engage with the locking plate.

[0018] The present invention also discloses a method for using a glue coating machine for producing thermal paper, and the specific steps are as follows:

[0019] The thermal paper is gradually conveyed through the upper surface of the glue coating roller after being limited and tensioned by the paper limiting assembly, and the glue coating roller is driven to rotate continuously by the driving member at the same time. When the glue coating roller rotates, its surface will be immersed in the glue in the glue tank in turn, so that the glue is adhered to the surface of the glue coating roller. Then the glue coating roller rotates through the scraper position, and the scraper scrapes off the excess glue on the surface of the glue coating roller through the blade below, so that the glue is evenly distributed on the surface of the glue coating roller, and the scraped glue falls downward into the glue tank. Then the glue coating roller rotates and passes under the paper limiting assembly, and cooperates with the paper limiting assembly to roll-coat the glue on its surface onto the surface of the thermal paper.

[0020] During the glue coating process, the scraper is driven by the reciprocating drive assembly to reciprocate and translate along the outer side surface of the blade at the bottom of the scraper, so that the glue adhered to the blade is scraped off by the scraper, and when the scraper moves to the end position of the scraper so that the scraper abuts against the scraper bar, the lifting assembly drives the scraper bar to move downward along the side of the scraper to scrape off the glue adhered to the scraper, and when the scraper moves in the opposite direction and separates from the scraper bar, the spring vibration assembly can drive the scraper bar to vibrate, so as to vibrate and shake off the residual glue on the scraper bar.

[0021] The present invention has the following beneficial effects:

[0022] 1. In the present invention, the excess glue on the surface of the glue coating roller is scraped off by the blade at the bottom of the scraper, so that the glue is evenly distributed on the surface of the glue coating roller, so that the glue coating roller can apply the glue more evenly and evenly on the surface of the thermal paper, thereby improving the gluing effect on the thermal paper, and the scraped glue falls downward into the glue tank below, which can realize automatic recovery of the glue and prevent glue waste; at the same time, during the glue coating process, the reciprocating drive component drives the scraper to reciprocate along the outer side surface of the blade at the bottom of the scraper, so that the scraper can scrape off the glue adhered to the blade, thereby preventing the glue from drying and adhering to the blade of the scraper and affecting the normal use of the scraper, which is beneficial to improving the scraping effect of the scraper.

[0023] 2. In the present invention, when the scraper moves to the end position of the scraper so that the scraper abuts against the scraper strip, the lifting assembly drives the scraper strip to move downward along the side of the scraper to scrape off the glue adhered to the scraper, thereby preventing the glue from drying and adhering to the scraper, and when the scraper moves in the opposite direction and separates from the scraper strip, the spring vibration assembly can drive the scraper strip to vibrate to shake off the residual glue on the scraper strip, so that through the cooperation of the reciprocating drive assembly, the scraper, the lifting assembly, the spring vibration assembly and the scraper strip, there will be no glue residue in the entire glue scraping system, which can not only significantly improve the glue scraping effect on the glue coating roller, but also make the subsequent cleaning and maintenance process of the glue scraping system more convenient and quick.

[0024] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the invention, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, they can also obtain drawings based on these drawings without paying creative work.

[0026] Figure 1 This is one of the three-dimensional structural schematic diagrams of the glue coating machine of the present invention;

[0027] Figure 2 The second schematic diagram of the three-dimensional structure of the glue coating machine of the present invention;

[0028] Figure 3 For the present invention Figure 2 A local enlarged structural schematic diagram;

[0029] Figure 4 The third schematic diagram of the three-dimensional structure of the glue coating machine of the present invention;

[0030] Figure 5 For the present invention Figure 4 A schematic diagram of the local enlarged structure at B;

[0031] Figure 6 The fourth is a schematic diagram of the three-dimensional structure of the glue coating machine of the present invention;

[0032] Figure 7 For the present invention Figure 6 A schematic diagram of the local enlarged structure at C;

[0033] Figure 8 For the present invention Figure 6 A schematic diagram of the local enlarged structure at D;

[0034] Fig. 9 It is a three-dimensional structural schematic diagram of the cleaning component of the present invention;

[0035] Fig.10 For the present invention Fig. 9 Schematic diagram of the local enlarged structure at E.

[0036] In the figure: 1, chassis; 2, glue coating mechanism; 21, glue coating roller; 22, limit pressure roller; 23, glue tank; 24, scraper; 25, knife edge; 26, support shaft; 27, bracket; 28, hydraulic telescopic shaft; 3, scraper cleaning mechanism; 31, reciprocating screw; 32, screw pair; 33, scraper; 34, main transmission wheel; 35, driving wheel; 36, primary transmission belt; 37, auxiliary transmission wheel; 38, secondary transmission belt; 39, driven wheel; 310, positioning seat; 311, lifting wedge block; 3 12. Translation wedge block; 313. Support spring; 314. Guide rail; 315. Slider; 316. Fixed shaft; 317. Telescopic shaft; 318. Scraper strip; 319. Guide bevel; 320. Slide plate; 321. Return spring; 322. Positioning sleeve; 323. Limiting column; 324. Limiting plate; 325. Pressure spring; 326. Telescopic sliding hole; 327. Lifting slide plate; 328. Limiting pin; 329. Buffer spring; 330. Vertical limiting surface; 331. Inclined guide surface. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the invention to clearly and completely describe the technical solutions in the embodiments of the invention. Obviously, the described embodiments are only part of the embodiments of the invention, not all of the embodiments. Based on the embodiments in the invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the invention.

[0038] In the description of the present invention, it is necessary to understand that the terms "opening", "upper", "lower", "top", "middle", "inside" and the like indicating orientation or positional relationship are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the invention.

[0039] Embodiment 1

[0040] See also Figure 1-Figure 3 As shown, the present invention is a glue coating machine for producing thermal paper, comprising a chassis 1 and a glue coating mechanism 2 installed inside the chassis 1, the glue coating mechanism 2 comprising a glue tank 23, a scraper 24 and a paper limiting assembly, a glue coating roller 21 is rotatably installed above the glue tank 23, the bottom end of the glue coating roller 21 is immersed in the glue tank 23, and the glue coating roller 21 can rotate continuously under the drive of the driving member inside the chassis 1, the paper limiting assembly is installed above the glue coating roller 21 for limiting the thermal paper, so that the thermal paper can move through the top of the glue coating roller 21, the scraper 24 is installed above the glue tank 23, and the bottom surface of the scraper 24 is provided with a knife edge 25 located on one side of the glue coating roller 21; a scraper 24 is also installed in the chassis 1 for cleaning the glue on the scraper 24 The scraper cleaning mechanism 3 includes a reciprocating drive assembly and a scraper 33. The reciprocating drive assembly can drive the scraper 33 to reciprocate and translate along the outer side surface of the blade 25 at the bottom of the scraper 24 to scrape off the glue adhered to the blade 25; both ends of the scraper 24 are equipped with scraper strips 318 for cleaning the scraped glue surface of the scraper 33. The scraper strips 318 are installed on the ends of the scraper 24 through a lifting assembly and a spring vibration assembly. When the scraper 33 moves to a position abutting against the scraper strip 318, the lifting assembly can drive the scraper strip 318 to move downward along one side of the scraper 33 to scrape off the glue adhered to the scraper 33 downward. The spring vibration assembly can drive the scraper strip 318 to vibrate when the scraper strip 318 is separated from the scraper 33, so as to vibrate and shake off the glue on the scraper strip 318;

[0041] Specifically, in this embodiment, the driving member is a servo motor that is transmission-connected to the glue coating roller 21. When the glue coating machine is in use, the thermal paper is gradually conveyed through the upper surface of the glue coating roller 21 after being limited and tensioned by the paper limiting assembly. At the same time, the glue coating roller 21 is driven to rotate continuously by the servo motor. When the glue coating roller 21 rotates, its surface will be immersed in the glue in the glue tank 23 in turn, so that glue adheres to the surface of the glue coating roller 21. Then, the glue coating roller 21 rotates through the position of the scraper 24. The scraper 24 scrapes off excess glue on the surface of the glue coating roller 21 through the blade 25 below, so that the glue is evenly distributed on the surface of the glue coating roller 21, and the scraped glue falls downward into the glue tank 23. Then, the glue coating roller 21 rotates through the paper Under the limiting assembly, it cooperates with the paper limiting assembly to roll-coat the glue on its surface onto the surface of the thermal plate paper; during the glue coating process, the scraper 33 is driven by the reciprocating drive assembly to reciprocate along the outer side surface of the blade 25 at the bottom of the scraper 24, so as to scrape off the glue adhering to the blade 25 through the scraper 33, and when the scraper 33 moves to the end position of the scraper 24 so that the scraper 33 abuts against the scraper bar 318, the lifting assembly drives the scraper bar 318 to move downward along the side of the scraper 33 to scrape off the glue adhering to the scraper 33, and when the scraper 33 moves in the opposite direction and separates from the scraper bar 318, the spring vibration assembly can drive the scraper bar 318 to vibrate, so as to shake off the glue remaining on the scraper bar 318;

[0042] The excess glue on the surface of the glue roller 21 is scraped off by the blade 25 at the bottom of the scraper 24, so that the glue is evenly distributed on the surface of the glue roller 21, so that the glue roller 21 can apply the glue more evenly and evenly on the surface of the thermal paper, thereby improving the gluing effect on the thermal paper. The scraped glue falls downward into the glue tank 23 below, which can realize automatic recycling of the glue and prevent glue waste. At the same time, during the glue coating process, the scraper 33 is driven by the reciprocating drive assembly to move along the outer side of the blade 25 at the bottom of the scraper 24. The surface moves back and forth to scrape off the glue adhered to the blade 25 through the scraper 33, preventing the glue from drying and adhering to the blade 25 of the scraper 24 and affecting the normal use of the scraper 24, which is beneficial to improving the scraping effect of the scraper 24; through the cooperation of the reciprocating drive component, the scraper 33, the lifting component, the spring vibration component and the scraper strip 318, there will be no glue residue in the entire scraping system, which can not only significantly improve the scraping effect of the glue coating roller 21, but also make the subsequent cleaning and maintenance process of the scraping system more convenient and quick.

[0043] Embodiment 2

[0044] See also Figure 2 , Figure 3As shown, the difference between this embodiment and the above embodiment is that the paper limiting assembly includes a limiting pressure roller 22, which is rotatably installed inside the chassis 1 and located above the glue coating roller 21, and both ends of the limiting pressure roller 22 are provided with guide rollers rotatably installed inside the chassis 1; the glue coating mechanism 2 also includes a support shaft 26 and a hydraulic telescopic shaft 28, the support shaft 26 is fixedly installed inside the chassis 1, and both ends of the support shaft 26 are rotatably installed with brackets 27, and the two brackets 27 are respectively fixedly installed at both ends of the scraper 24; the top end of the hydraulic telescopic shaft 28 is rotatably installed on the inner wall of the chassis 1, and the telescopic end at the bottom of the hydraulic telescopic shaft 28 is rotatably connected to the bracket 27;

[0045] When applying glue, the thermal paper passes under the limiting pressure roller 22, and at the same time, the two guide rollers on both sides guide and tension the thermal paper. The limiting pressure roller 22 can cooperate with the glue roller 21 to roll the glue on one side of the thermal paper; and through the extension and retraction of the hydraulic telescopic shaft 28, the inclination angle of the bracket 27 can be adjusted, and then the position of the scraper 24 and the distance between the blade 25 and the glue roller 21 can be adjusted, so that after the glue is scraped by the blade 25, different thicknesses of glue can be left on the surface of the glue roller 21 to meet different gluing requirements.

[0046] Embodiment 3

[0047] See also Figure 2-Figure 7 As shown, the difference between this embodiment and the above-mentioned embodiment is that the reciprocating drive assembly includes a reciprocating screw rod 31 and a transmission unit, the reciprocating screw rod 31 is rotatably installed between the two brackets 27, a screw pair 32 is threadedly installed on the reciprocating screw rod 31, one side of the screw pair 32 slides against the outer side surface of the scraper 24, a scraper plate 33 is fixedly installed at the bottom end of the screw pair 32, and one end of the reciprocating screw rod 31 is transmission-connected with the end of the glue coating roller 21 through the transmission unit; the transmission unit includes a main transmission wheel 34, a driving wheel 35 and a driven wheel 39, the driving wheel 35 is fixedly installed at the end of the glue coating roller 21, the main transmission wheel 34 is rotatably installed at the end of the support shaft 26, the driving wheel 35 and the main transmission wheel 34 are transmission-connected through a primary transmission belt 36, a coaxially arranged secondary transmission wheel 37 is fixedly installed on one side of the main transmission wheel 34, the driven wheel 39 is fixedly installed at the end of the reciprocating screw rod 31, and the secondary transmission wheel 37 and the driven wheel 39 are transmission-connected through a secondary transmission belt 38;

[0048] The scraper 33 is tilted so that the scraper 33 can be closely attached to the surface of the blade 25. When the glue coating roller 21 rotates to apply glue, the glue coating roller 21 drives the driving wheel 35 to rotate. The driving wheel 35 drives the main transmission wheel 34 to rotate through the primary transmission belt 36. The main transmission wheel 34 drives the secondary transmission wheel 37 to rotate synchronously. The secondary transmission wheel 37 drives the driven wheel 39 to rotate through the secondary transmission belt 38, so that the driven wheel 39 drives the reciprocating screw 31 to rotate. When the reciprocating screw 31 rotates, the screw pair 32 is driven to reciprocate on one side of the scraper 24 through the threaded transmission, thereby driving the scraper 33 to reciprocate along the blade 25 of the scraper 24, so that the scraper 33 scrapes off the glue adhered to the blade 25.

[0049] Through the transmission connection cooperation between the transmission unit and the reciprocating screw rod 31, when the glue coating roller 21 rotates, it can synchronously drive the scraper 33 to move back and forth along the surface of the blade 25 to scrape the glue, making the driving process of the scraper 33 more convenient, and the transmission unit performs a secondary transmission connection through the cooperation of the driving wheel 35, the main transmission wheel 34, the primary transmission belt 36, the auxiliary transmission wheel 37, the driven wheel 39 and the secondary transmission belt 38, so that when the bracket 27 rotates to adjust the angle, it will not affect the normal use of the transmission unit.

[0050] Embodiment 4

[0051] See also Figure 4-Figure 10 As shown, the difference between this embodiment and the above-mentioned embodiment is that the lifting assembly includes a positioning seat 310, the positioning seat 310 is fixedly installed on the inner side surface of the bracket 27, a lifting wedge block 311 is slidably installed inside the positioning seat 310, the top of the lifting wedge block 311 is provided with an open groove for the reciprocating screw rod 31 to pass through, and the bottom end of the lifting wedge block 311 is abutted against a support spring 313, and a translation wedge block 312 corresponding to the lifting wedge block 311 is slidably installed on the inner side surface of the positioning seat 310, and one end of the translation wedge block 312 slides and extends to the outside of the positioning seat 310; a guide inclined groove 319 is provided at the lower part of the inner side surface of the positioning seat 310, and the lifting wedge block 311 is provided with a guide inclined groove 319. A guide rail 314 is fixedly installed on one side of the lower end of the block 311, a slider 315 is slidably installed in the guide rail 314, a fixed shaft 316 is fixedly installed on one side of the slider 315, and one end of the fixed shaft 316 passes through the guide inclined slot 319 and extends to the outside of the positioning seat 310; the spring vibration assembly includes a slide plate 320 and a locking unit, the slide plate 320 is slidably installed inside the fixed shaft 316, a return spring 321 is abutted against the inner side surface of the slide plate 320, a telescopic shaft 317 is fixedly installed on the outer end of the slide plate 320, and a scraper strip 318 is fixedly installed on one end of the telescopic shaft 317, and the locking unit is arranged at the upper end of the fixed shaft 316, and can limit and lock the slide plate 320;

[0052] Specifically, when the screw pair 32 and the scraper 33 move to the end of the scraper 24, the screw pair 32 abuts against the outer end of the translation wedge block 312, and the scraper strip 318 abuts against the upper part of the scraping surface of the scraper 33. Then, as the screw pair 32 and the scraper 33 continue to move toward the end, the screw pair 32 moves the translation wedge block 312 toward the inside of the positioning seat 310. At this time, the translation wedge block 312 abuts and moves the lifting wedge block 311 downward through the inclined surface, and the fixed shaft 316, the telescopic shaft 317 and the scraper strip 318 move downward, and the fixed shaft 316 moves downward. During the movement, the scraper strip 318 moves obliquely downward under the guidance of the guide bevel groove 319, so as to drive the scraper strip 318 to move obliquely downward, so that the scraper strip 318 can completely scrape and clean the side of the inclined scraper plate 33, and then scrape off the glue on the scraping surface of the scraper plate 33. During the downward movement and scraping process, the scraper strip 318 moves toward the positioning seat 310 under the abutment of the scraper plate 33, and retracts the telescopic shaft 317 back into the fixed shaft 316. At the same time, the scraper strip 318 is always tightly attached to the side of the scraper plate 33 under the elastic force of the reset spring 321, so as to ensure the scraping and cleaning effect.

[0053] Furthermore, the locking unit includes a positioning sleeve 322, which is fixedly installed on the top of the fixed shaft 316 and is located below the inclined surface of the translation wedge block 312. A limiting column 323 is slidably installed on the top of the positioning sleeve 322. A limiting plate 324 slidably connected to the inside of the positioning sleeve 322 is fixedly installed on the inner side end of the limiting column 323. A pressure spring 325 abutting against the bottom surface of the limiting plate 324 is sleeved on the lower end of the limiting column 323. A telescopic sliding hole 326 is provided, a lifting slide plate 327 is slidably installed inside the telescopic sliding hole 326, a limiting ring is installed on the inner wall of the telescopic sliding hole 326 for limiting the bottom surface of the lifting slide plate 327, a buffer spring 329 is installed against the top surface of the lifting slide plate 327, a limiting pin 328 is fixedly installed on the bottom surface of the lifting slide plate 327, an inclined guide surface 331 is provided on one side of the bottom end of the limiting pin 328, and a vertical limiting surface 330 is provided on the other side of the bottom end of the limiting pin 328;

[0054] When the wedge block 312, the scraper strip 318 and the telescopic shaft 317 are moved in contact with each other during the scraping process, the wedge block 312 moves the limit post 323 downwardly through the inclined surface, so that the bottom end of the limit pin 328 extends to the inside of the fixed shaft 316, and the slide plate 320 moves toward the inner side of the fixed shaft 316, and the return spring 321 is retracted. When the slide plate 320 moves to the position of the limit pin 328, the slide plate 320 is guided by the inclined surface. The surface 331 pushes the limit pin 328 upward to retract, so that the slide plate 320 can move past the limit pin 328, and then the limit pin 328 is reset downward under the elastic force of the buffer spring 329; and when the screw rod pair 32 and the scraper 33 move to the end and start to move in the opposite direction and no longer abut the translation wedge block 312 and the scraper strip 318, the lifting wedge block 311 is reset upward under the elastic force of the support spring 313, and the translation wedge block 312 is abutted outwards through the inclined surface. The limit pin 328 is moved back and forth, and at this time, the limit pin 328 contacts the slide plate 320 through the vertical limit surface 330 to limit and lock the slide plate 320, the telescopic shaft 317 and the scraper strip 318, and the reset spring 321 is in a contracted and force-accumulating state until the bottom surface of the translation wedge block 312 slides away from the limit column 323, and the limit column 323 is reset upward under the elastic force of the pressure spring 325, and drives the limit pin 328 upward, so that the vertical limit pin 328 at the bottom end is The limiting surface 330 is offset from the slide plate 320. At this time, the slide plate 320 is ejected and reset under the action of the reset elastic force of the reset spring 321, and drives the telescopic shaft 317 and the scraper 318 to eject and move until the slide plate 320 moves to the end of the fixed shaft 316, is abutted and stopped urgently, and drives the telescopic shaft 317 and the scraper 318 to stop urgently, so that the glue adhered to the scraper 318 is thrown off through the moving inertia of the scraper 318 when it stops urgently, preventing the glue from adhering to the scraper 318.

[0055] Embodiment 5

[0056] This embodiment discloses a method for using a glue coating machine for producing thermal paper, and the specific steps are as follows:

[0057] After being limited and tensioned by the paper limiting assembly, the thermal paper is gradually conveyed to pass through the upper surface of the glue coating roller 21. At the same time, the glue coating roller 21 is driven to rotate continuously by the driving member. When the glue coating roller 21 rotates, its surface is successively immersed in the glue in the glue tank 23, so that the glue adheres to the surface of the glue coating roller 21. Then, the glue coating roller 21 rotates to pass the position of the scraper 24. The scraper 24 scrapes off the excess glue on the surface of the glue coating roller 21 through the blade 25 below, so that the glue is evenly distributed on the surface of the glue coating roller 21, and the scraped glue falls downward into the glue tank 23. Then, the glue coating roller 21 rotates to pass under the paper limiting assembly, and cooperates with the paper limiting assembly to roll-coat the glue on its surface onto the surface of the thermal paper.

[0058] During the glue coating process, the scraper 33 is driven by the reciprocating drive assembly to reciprocate along the outer side surface of the blade 25 at the bottom of the scraper 24, so that the glue adhered to the blade 25 is scraped off by the scraper 33, and when the scraper 33 moves to the end position of the scraper 24 so that the scraper 33 abuts against the scraper strip 318, the lifting assembly drives the scraper strip 318 to move downward along the side of the scraper 33 to scrape off the glue adhered to the scraper 33, and when the scraper 33 moves in the opposite direction and separates from the scraper strip 318, the spring vibration assembly can drive the scraper strip 318 to vibrate, so as to vibrate and shake off the residual glue on the scraper strip 318.

[0059] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0060] The preferred embodiments of the invention disclosed above are only used to help explain the invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the invention, so that those skilled in the art can understand and use the invention well.

Claims

1. A glue coating machine for producing thermal paper, comprising a chassis and a glue coating mechanism installed inside the chassis, characterized in that: The glue coating mechanism comprises a glue tank, a scraper and a paper limiting assembly. A glue coating roller is rotatably mounted above the glue tank. The bottom end of the glue coating roller is immersed in the glue tank, and the glue coating roller can rotate continuously under the drive of the driving member inside the chassis. The paper limiting assembly is mounted above the glue coating roller and is used to limit the thermal plate paper so that the thermal plate paper can move through the top of the glue coating roller. The scraper is mounted above the glue tank, and the bottom surface of the scraper is provided with a knife edge located on one side of the glue coating roller. The chassis is also provided with a scraper cleaning mechanism for cleaning glue on the scraper, the scraper cleaning mechanism comprising a reciprocating drive assembly and a scraper, the reciprocating drive assembly can drive the scraper to move back and forth along the outer side surface of the blade at the bottom of the scraper to scrape off the glue adhering to the blade; Both ends of the scraper are equipped with scraper strips for cleaning the glue scraping surface of the scraper. The scraper strips are installed on the end of the scraper through a lifting assembly and a spring vibration assembly. The lifting assembly can drive the scraper strip to move downward along one side of the scraper when the scraper moves to a position abutting the scraper strip, so as to scrape off the glue adhered to the scraper. The spring vibration assembly can drive the scraper strip to vibrate when the scraper strip is separated from the scraper, so as to vibrate and shake off the glue on the scraper strip.

2. The glue coating machine for producing thermal paper according to claim 1, characterized in that: The paper limiting assembly comprises a limiting pressure roller, which is rotatably mounted inside the chassis and located above the glue coating roller. Both ends of the limiting pressure roller are provided with guide rollers rotatably mounted inside the chassis.

3. The glue coating machine for producing thermal paper according to claim 1, characterized in that: The glue coating mechanism also includes a support shaft and a hydraulic telescopic shaft, the support shaft is fixedly installed inside the chassis, both ends of the support shaft are rotatably mounted with brackets, and the two brackets are respectively fixedly installed at both ends of the scraper; The top end of the hydraulic telescopic shaft is rotatably mounted on the inner wall of the chassis, and the telescopic end at the bottom of the hydraulic telescopic shaft is rotatably connected to the bracket.

4. The glue coating machine for producing thermal paper according to claim 3, characterized in that: The reciprocating drive assembly includes a reciprocating screw and a transmission unit. The reciprocating screw is rotatably installed between two brackets. A screw pair is threadedly installed on the reciprocating screw. One side of the screw pair slides against the outer side of the scraper. The scraper is fixedly installed at the bottom end of the screw pair. One end of the reciprocating screw is transmission-connected to the end of the glue coating roller through the transmission unit.

5. The glue coating machine for producing thermal paper according to claim 4, characterized in that: The transmission unit includes a main transmission wheel, a driving wheel and a driven wheel. The driving wheel is fixedly installed on the end of the glue coating roller, the main transmission wheel is rotatably installed on the end of the support shaft, the driving wheel and the main transmission wheel are connected by a primary transmission belt, a coaxially arranged secondary transmission wheel is fixedly installed on one side of the main transmission wheel, the driven wheel is fixedly installed on the end of the reciprocating screw rod, and the secondary transmission wheel and the driven wheel are connected by a secondary transmission belt.

6. The glue coating machine for producing thermal paper according to claim 4, characterized in that: The lifting assembly includes a positioning seat, which is fixedly mounted on the inner side surface of the bracket, a lifting wedge block is slidably mounted inside the positioning seat, an open groove for a reciprocating screw rod to pass through is provided at the top end of the lifting wedge block, a supporting spring is abutted against the bottom end of the lifting wedge block, a translation wedge block corresponding to the lifting wedge block is slidably mounted on the inner side surface of the positioning seat, and one end of the translation wedge block slides and extends to the outside of the positioning seat.

7. The glue coating machine for producing thermal paper according to claim 6, characterized in that: A guiding inclined groove is provided at the lower part of the inner side surface of the positioning seat, a guide rail is fixedly installed on one side of the lower end of the lifting wedge block, a slider is slidably installed in the guide rail, a fixed shaft is fixedly installed on one side of the slider, and one end of the fixed shaft passes through the guiding inclined groove and extends to the outside of the positioning seat.

8. The glue coating machine for producing thermal paper according to claim 7, characterized in that: The spring vibration assembly includes a slide plate and a locking unit. The slide plate is slidably installed inside the fixed shaft. A return spring is installed in abutment with the inner side surface of the slide plate. A telescopic shaft is fixedly installed on the outer end of the slide plate. The scraper strip is fixedly installed on one end of the telescopic shaft. The locking unit is arranged at the upper end of the fixed shaft and can lock the slide plate in a limited position.

9. The glue coating machine for producing thermal paper according to claim 8, characterized in that: The locking plate is secured on a slidable basis weight to abut against the locking plate, and the locking plate is engaged to the locking plate, the locking plate being secured on a slidable basis weight to abut against the locking plate.

10. A method for using the glue coating machine for producing thermal paper according to any one of claims 1 to 9, characterized in that: The specific steps are as follows: The thermal paper is gradually conveyed through the upper surface of the glue coating roller after being limited and tensioned by the paper limiting assembly, and the glue coating roller is driven to rotate continuously by the driving member at the same time. When the glue coating roller rotates, its surface will be immersed in the glue in the glue tank in turn, so that the glue is adhered to the surface of the glue coating roller. Then the glue coating roller rotates through the scraper position, and the scraper scrapes off the excess glue on the surface of the glue coating roller through the blade below, so that the glue is evenly distributed on the surface of the glue coating roller, and the scraped glue falls downward into the glue tank. Then the glue coating roller rotates and passes under the paper limiting assembly, and cooperates with the paper limiting assembly to roll-coat the glue on its surface onto the surface of the thermal paper. During the glue coating process, the scraper is driven by the reciprocating drive assembly to reciprocate and translate along the outer side surface of the blade at the bottom of the scraper, so that the glue adhered to the blade is scraped off by the scraper, and when the scraper moves to the end position of the scraper so that the scraper abuts against the scraper bar, the lifting assembly drives the scraper bar to move downward along the side of the scraper to scrape off the glue adhered to the scraper, and when the scraper moves in the opposite direction and separates from the scraper bar, the spring vibration assembly can drive the scraper bar to vibrate, so as to vibrate and shake off the residual glue on the scraper bar.

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