Automatic printing device for laser film packaging bags

Abstract

The invention discloses an automatic printing device for laser film packaging bags, comprising a stand, a conveyor belt body and a printing mechanism; the invention optimizes the setting of the printing mechanism, and the packaging bag and the transfer film with a laser pattern enter the printing mechanism from the left side and the upper part of the printing mechanism respectively for transfer and embossing; an oiling structure is arranged on the lower left side of the inner part of a cover seat, and UV varnish is evenly applied to the packaging bag through the oiling structure, and fine grooves are scraped off the surface of the UV varnish after application, so as to improve the laminating effect after contact with the transfer film and avoid bubbles therebetween, and the middle part of the guiding double rollers, the left end of the flattening structure and the left side of the metal roller are located on the same inclined plane, so that the transfer film is convenient to contact with the flattening structure in the process of guiding static electricity removal, and after the static electricity on the transfer film is eliminated by the metal stick and the ion blower, the flattening structure flattens the wrinkles on the surface of the transfer film caused by static electricity, so as to ensure the flatness of the transfer film and further improve the printing effect.

Description

Technical Field

[0001] The invention relates to the technical field of laser printing, in particular to an automatic printing device for laser film packaging bags. Background Art

[0002] In the field of packaging printing, the embossing transfer machine is a type of laser printing machine. Its main function is laser embossing transfer. Laser embossing transfer is derived from the laser film molding process in the laser paper manufacturing process. The laser embossing transfer process utilizes the principle that the pattern on the surface of the laser film is imaged through extremely fine concave and convex shapes, as well as the characteristics of UV varnish that it has strong plasticity and can be instantly and thoroughly cured before curing. UV varnish is applied on the surface of the printed product, and the laser film with a pattern is pressed against it before the UV varnish is cured. The concave and convex pattern on the surface of the laser film is used as a mold, and a concave and convex pattern consistent with the surface pattern of the laser film is embossed on the surface of the UV varnish. After the UV varnish is cured, the laser pattern is formed.

[0003] At present, China's patent application number: CN202310980993.2 discloses a laser printer and a printing method, including a mounting part; a PLC control system, which is installed on the mounting part; an embossing conveying component, which is installed in the mounting part; a film pressing roller, which is installed on the mounting part; a position adjustment assembly, two groups of which are installed on both sides of the film pressing roller, and the position adjustment assembly is used to adjust the height position of the film pressing roller; wherein: the position adjustment assembly is suitable for automatically detecting the thickness of the packaging paper after the transfer film is installed and adjusting the film pressing roller to move to the embossing position and fix it, and the position adjustment assembly is suitable for automatically adjusting the film pressing roller away from the embossing conveying component when the transfer film is not installed.

[0004] However, in the prior art, the material is usually coated with UV varnish in advance before being sent to the equipment for printing. During the process, the UV varnish may easily solidify and flow, thus affecting the uniformity of the distribution of the UV varnish. In addition, bubbles may easily form between the transfer film and the UV varnish during lamination printing. Furthermore, static electricity may easily form on the surface of the transfer film during transportation, thus causing wrinkles, which makes it difficult to handle the wrinkles and thus affects the printing effect. Summary of the invention

[0005] The object of the present invention is to provide an automatic printing device for laser film packaging bags to solve the problems raised in the above background technology.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: an automatic printing device for laser film packaging bags, comprising a stand, a conveyor belt main body and a printing mechanism, a conveyor belt main body is arranged on the top side of the stand, and a printing mechanism is installed on the top of the stand, the printing mechanism comprises a cover seat fastened to the stand on the front and rear sides of the bottom, a top cover fastened to the top side of the cover seat, a guide double roller rotatably arranged on the left side of the top cover, a partition fixedly connected to the left side of the cover seat, an oiling structure arranged on the left side of the partition, an ion fan installed on the upper right side of the partition, a flattening structure arranged on the lower right side of the ion fan, a metal roller located below the flattening structure, an ultraviolet curing main body fastened to the lower right side of the cover seat, and a first pressure assembly and a second pressure assembly respectively arranged on the left and right sides of the ultraviolet curing main body, the rear side of the oiling structure is fastened to the cover seat, the ion fan is located below the guide double rollers, the front and rear sides of the metal rollers are both rotatably connected to the cover seat, and the middle of the guide double rollers, the left end of the flattening structure and the left side of the metal roller are located on the same inclined plane.

[0007] Preferably, a windshield block is arranged on the right side of the front part of the ion blower, and the windshield block is arranged to be inclined from right to left toward the front side, so as to blow the ion-carrying airflow toward the partition.

[0008] Preferably, the first pressing assembly and the second pressing assembly have the same structure and size and are located at the same height. The second pressing assembly includes an electric push rod fixed to the cover seat on the top side of the rear portion, a pressure roller frame connected to the output shaft at the bottom of the electric push rod, and protective plates arranged on the left and right sides of the pressure roller frame to serve as a limiter, and the rear side of the protective plate is fixed to the cover seat.

[0009] Preferably, the oiling structure includes a supporting assembly fixed to the cover seat at the rear side, a scraper assembly connected to the lower middle side of the supporting assembly, a sleeve block fixedly connected to the left side of the bottom of the scraper assembly, a roller slidably connected to the lower middle side of the sleeve block, a spring installed on the top side of the roller, and an oil spray head arranged on the right side of the sleeve block, the top end of the spring abuts against the top side of the sleeve block, the oil spray head is fixed to the front and rear sides of the bottom of the scraper assembly, the front side of the oil spray head is connected to a hose for conveying UV varnish, and the front part of the hose passes through and is arranged on the lower left side of the front part of the cover seat.

[0010] Preferably, the supporting assembly includes a bin cover fastened to the cover seat on the left side, a first motor fastened to the upper right side of the bin cover, a first threaded rod connected to the left output end of the first motor, a first internal thread block threadedly connected to the outer surface of the first threaded rod, a bearing component fixedly connected to the rear side of the first internal thread block, a shift frame connected to the front side of the bearing component, and a first side frame and a second side frame slidably connected to the left and right sides of the shift frame, respectively, the rear side of the bearing component contacts and slides with the bin cover, the bottom of the shift frame is fastened to the scraper assembly, and the tops of the first side frame and the second side frame are both fastened to the bin cover.

[0011] Preferably, the bearing component includes a support plate whose rear side is in sliding contact with the bin cover, two transverse grooves opened on the top side of the support plate, two positioning blocks respectively slidably connected to the inner sides of the two transverse grooves, two oblique grooves respectively opened on the left and right sides of the support plate, and two sliding blocks respectively slidably connected to the inner sides of the two oblique grooves, the rear side of the positioning block is fixed to the bin cover, and the front middle side of the sliding block is connected to the shift frame.

[0012] Preferably, the scraper assembly includes a cover frame connected to the supporting assembly on the front and rear sides of the top, a second motor fastened to the right side of the top of the cover frame, a second threaded rod connected to the left output end of the second motor, a second internal threaded block threadedly connected to the outer surface of the second threaded rod, a cross plate fixedly connected to the bottom side of the second internal threaded block, four shaft rods fixedly connected to the front and rear sides of the inside of the cover frame, a sleeve arranged and slidable on the outer surfaces of the four shaft rods, and a scraper rod fastened to the middle side of the bottom of the sleeve, the cross plate is laterally slidably connected to the top side of the inside of the cover frame, eight sleeves are provided, and the connection positions between two of them and the two shaft rods are staggered.

[0013] Preferably, a through groove is opened in the middle side of the right part of the cover frame, and the second internal thread block is arranged through the inner side of the through groove, a protrusion is opened in the middle side of the top of the sleeve, a sliding groove is opened in an inclined shape on the bottom side of the cross plate, and the top of the protrusion is inserted and slid inside the sliding groove.

[0014] Preferably, the flattening structure includes a positioning frame fixed to the cover seat at the top of the rear side, a third motor fastened to the right side of the rear portion of the positioning frame, a rotating rod connected to the front output end of the third motor, a push rod rotatably connected to the right side of the front of the rotating rod, a rotating head rotatably connected to the other end of the push rod, a sliding seat connected to the front and rear sides of the rotating head, a spiral rod integrally formed at the left end of the rotating head, an inner groove cylinder connected to the outer surface of the spiral rod, a gear fixedly connected to the left side of the outer surface of the inner groove cylinder, a rack meshingly transmitted to the bottom side of the gear, a slide fixedly connected to the bottom of the rack, and a ball rollingly arranged on the left end of the slide, the rear side of the rotating rod is rotatably connected to the positioning frame, the top of the slide seat is slidably connected to the positioning frame, the inner groove cylinder passes through and rotates in the middle of the left part of the positioning frame, and the right side of the top of the slide is slidably connected to the positioning frame in the front-to-back direction.

[0015] Preferably, the front and rear sides of the top of the sliding seat are inclined, and the inclined part is inserted and slid on the middle side of the bottom of the positioning frame. There are no less than five balls, which are evenly distributed on the left end of the slide. The right side of the gear is rotatably connected to the positioning frame, and a convex ring that plays a limiting role is provided on the right side of the outer surface of the inner groove cylinder.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention optimizes the setting of a printing mechanism, and allows a packaging bag and a transfer film with a laser pattern to enter the printing mechanism from the left side and the top of the printing mechanism respectively for transfer and embossing, and an oiling structure is arranged on the lower left side of the inner part of the cover seat, and UV varnish is evenly applied to the packaging bag through the oiling structure, and fine grooves are scraped off the surface of the UV varnish after application, so as to improve the fitting effect after contact with the transfer film and avoid bubbles therebetween, and the middle part of the guiding double rollers, the left end of the flattening structure and the left side of the metal roller are located on the same inclined plane, so that the transfer film is convenient to contact with the flattening structure during the process of guiding static electricity removal, and after the static electricity on the transfer film is eliminated by the metal roller and the ion blower, the flattening structure flattens the wrinkles on the surface of the transfer film caused by static electricity, so as to ensure the flatness of the transfer film and thereby improve the printing effect.

[0018] The rear side of the positioning block of the present invention is fixed to the bin cover, and the middle side of the front part of the sliding block is connected to the shift frame. When the support piece is displaced by the action of the first internal thread block, the support piece stably moves laterally under the support of the positioning block. After the support piece moves laterally, the sliding block slides to a position inside the inclined groove, thereby driving the shift frame to perform a vertical shift action under the limiting action of the first side frame and the second side frame through the movement of the sliding block.

[0019] The present invention provides eight sleeves, and the connection positions between two of them and the two shaft rods are staggered to ensure the stability of the movement of the sleeves and to make each sleeve relatively close to each other. A protrusion is provided on the middle side of the top of the sleeve, and a sliding groove is provided on the bottom side of the cross plate in an inclined shape, and the top of the protrusion is inserted and slid inside the sliding groove. When the cross plate moves laterally, the sleeve is expanded or contracted and moved closer to the position on the surface of the shaft rod through the cooperation of the sliding groove and the protrusion, thereby driving the scraper rod to shift to change the scraping groove spacing for UV varnish.

[0020] The front and rear sides of the top of the slide seat of the present invention are both inclined, and the inclined part is inserted and slid on the middle side of the bottom of the positioning frame to play a role of supporting displacement, ensuring that the slide seat can stably reciprocate. No less than five balls are provided and are equidistantly distributed on the left end of the slide plate to increase the contact area with the transfer film and ensure the wrinkle removal effect on the transfer film. The right side of the gear is rotatably connected to the positioning frame, and a convex ring that plays a limiting role is provided on the right side of the outer surface of the inner groove cylinder, which plays a limiting role and ensures that the inner groove cylinder can stably rotate on the inner side of the positioning frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 It is a structural schematic diagram of the printing mechanism of the present invention;

[0023] Figure 3 It is a structural schematic diagram of the oil coating structure of the present invention;

[0024] Figure 4 For the present invention Figure 3 left side view of the middle support assembly;

[0025] Figure 5 It is a structural schematic diagram of the bearing component of the present invention;

[0026] Figure 6 It is a structural schematic diagram of the scraper assembly of the present invention;

[0027] Figure 7 It is a structural schematic diagram of the connection between the transverse plate and the cover frame of the present invention;

[0028] Figure 8 It is a structural schematic diagram of the flattened structure of the present invention;

[0029] Fig. 9 It is a schematic structural diagram of the connection between the spiral rod and the inner grooved cylinder of the present invention.

[0030] In the figure: stand 1, conveyor belt body 2, printing mechanism 3, hose 30, cover seat 31, top cover 32, guide double rollers 33, partition 34, oiling structure 35, ion fan 36, flattening structure 37, metal roller 38, ultraviolet curing body 39, first pressure assembly 40, second pressure assembly 41, electric push rod 411, pressure roller frame 412, guard sheet 413, wind shield 361, support assembly 351, scraper assembly 352, sleeve block 353, roller 354, spring 355, oil spray head 356, warehouse cover 3511, first motor 3512, first threaded rod 3513, first internal threaded block 3514, bearing component 3515, shift Positioning frame -3516, first side frame -3517, second side frame -3518, support plate -35151, transverse groove -35152, positioning block -35153, inclined groove -35154, sliding block -35155, cover frame -3521, second motor -3522, second threaded rod -3523, second internal threaded block -3524, transverse plate -3525, shaft rod -3526, sleeve -3527, scraper rod -3528, slide groove -35251, positioning frame -371, third motor -372, rotating rod -373, push rod -374, rotating head -375, slide seat -376, screw rod -377, inner groove cylinder -378, gear -379, rack -3710, slide plate -3711, ball -3712. DETAILED DESCRIPTION

[0031] In order to further explain the technical solution of the present invention, it is described in detail below through specific embodiments.

[0032] See also Figure 1 and Figure 2The present invention provides an automatic printing device for laser film packaging bags, including a stand 1, a conveyor belt body 2 and a printing mechanism 3. The conveyor belt body 2 is arranged on the top side of the stand 1, and the printing mechanism 3 is installed on the top of the stand 1. The packaging bag and the transfer film with a laser pattern enter the printing mechanism 3 from the left side and the top of the printing mechanism 3 for transfer and imprinting. The printing mechanism 3 includes a cover seat 31 fastened to the stand 1 at the front and back sides of the bottom, a top cover 32 fastened to the top side of the cover seat 31, and a guide double roller 33 rotatably arranged on the left side of the top cover 32. The transfer film with the laser pattern is guided and transported to the inside of the cover seat 31 by the guide double rollers 33, and is fixedly connected to the partition 34 on the left side of the inside of the cover seat 31, and the oiling structure 35 is arranged on the left side of the partition 34. The UV varnish is evenly applied to the packaging bag through the oiling structure 35, and small grooves are scraped off on the surface of the UV varnish after application, which is convenient for the bonding effect of the transfer film after contact, avoids the generation of bubbles between them, and improves the effect of transfer imprinting. The ion blower 36 installed on the upper right side of the partition 34 and the ion blower 36 arranged on the lower right side The flattening structure 37 and the metal roller 38 below the flattening structure 37 eliminate the static electricity on the transfer film through the metal roller 38 and the ion fan 36, and then the flattening structure 37 is used to remove wrinkles and flatten the transfer film to ensure the flatness of the transfer film, thereby improving the printing effect. The ultraviolet curing body 39 fastened to the lower right part of the cover seat 31 and the first pressing assembly 40 and the second pressing assembly 41 respectively arranged on the left and right sides of the ultraviolet curing body 39, under the action of the first pressing assembly 40 and the second pressing assembly 41, the packaging bag and the transfer film are flattened. The film is pressed tightly to facilitate the embossing process, the rear side of the oil coating structure 35 is fastened to the cover seat 31, the ion fan 36 is located below the guide double rollers 33, and the front and rear sides of the metal roller 38 are rotatably connected to the cover seat 31 to transport the static electricity on the transfer film out for static electricity removal. The middle part of the guide double rollers 33, the left end of the flattening structure 37 and the left side of the metal roller 38 are located on the same inclined plane, which is convenient for the transfer film to contact the flattening structure 37 during the process of guiding static electricity removal, so that the wrinkles on the transfer film surface caused by static electricity are smoothed through the flattening structure 37.

[0033] Among them, a wind shield 361 is arranged on the right side of the front of the ion fan 36, and the wind shield 361 is inclined from right to left toward the front side, which is used to blow the ion-carrying airflow to the partition 34, prevent the airflow from blowing directly to the transfer film, and avoid the transfer film being disturbed by the airflow during the conveying and guiding process. The first pressure component 40 and the second pressure component 41 have the same structure and size, and are located at the same height position. The second pressure component 41 includes an electric push rod 411 fixed to the cover seat 31 on the top side of the rear part, a pressure roller frame 412 connected to the output shaft at the bottom of the electric push rod 411, and a protective plate 413 arranged on the left and right sides of the pressure roller frame 412 for limiting the role. The rear side of the protective plate 413 is fixed to the cover seat 31, so that the pressure roller frame 412 is vertically displaced inside the protective plate 413 through the electric push rod 411, so that the pressure roller frame 412 drives the transfer film to be pressed and contacted on the packaging bag.

[0034] See also Figure 1-7 The present invention provides an automatic printing device for laser film packaging bags. The oil coating structure 35 includes a support component 351 fixed to the cover seat 31 at the rear side, a scraper component 352 connected to the middle and lower side of the support component 351, and a sleeve block 353 fixedly connected to the left side of the bottom of the scraper component 352. Under the action of the support component 351, the scraper component 352 is longitudinally displaced to adjust the height position of the sleeve block 353. A roller 354 is slidably connected to the middle and lower side of the sleeve block 353, a spring 355 installed on the top side of the roller 354, and an oil spray head 356 arranged on the right side of the sleeve block 353. The top of the spring 355 The part abuts against the top side of the inner part of the sleeve block 353, and the spray head 356 is fixed to the front and rear sides of the bottom of the scraper groove assembly 352. After the sleeve block 353 is longitudinally displaced, the roller 354 is moved down by the spring 355 to contact the packaging bag, which plays a role of limiting guidance to ensure the stability of transportation, and the spray head 356 is synchronously moved down to be close to the top of the packaging bag to ensure the uniformity of the sprayed UV varnish. The front side of the spray head 356 is connected to a hose 30 for conveying UV varnish, and the front part of the hose 30 is penetrated and arranged on the lower left side of the front part of the cover seat 31, so as to facilitate the transportation of UV varnish through the hose 30 after the spray head 356 is longitudinally displaced.

[0035] The support assembly 351 includes a hopper cover 3511 fastened to the hopper seat 31 on the left side, a first motor 3512 fastened to the upper right side of the hopper cover 3511, a first threaded rod 3513 connected to the left output end of the first motor 3512, a first internal thread block 3514 threadedly connected to the outer surface of the first threaded rod 3513, and a bearing component 3515 fixedly connected to the rear side of the first internal thread block 3514. Under the action of the first motor 3512, the first threaded rod 3513 drives the bearing component 3515 to shift by cooperating with the first internal thread block 3514, and is connected to the bearing component 3515. 15, a shift frame 3516 on the front side and a first side frame 3517 and a second side frame 3518 which are slidably connected to the left and right sides of the shift frame 3516, respectively. The bottom of the shift frame 3516 is fastened to the scraper assembly 352. When the bearing member 3515 moves, the shift frame 3516 is driven to shift longitudinally inside the first side frame 3517 and the second side frame 3518 to adjust the height position of the scraper assembly 352. The rear side of the bearing member 3515 contacts and slides with the bin cover 3511. The tops of the first side frame 3517 and the second side frame 3518 are fastened to the bin cover 3511 to play a supporting and limiting role.

[0036] The bearing member 3515 includes a support piece 35151 whose rear side is in sliding contact with the bin cover 3511, two transverse grooves 35152 provided on the top side of the support piece 35151, two positioning blocks 35153 respectively slidably connected to the inner sides of the two transverse grooves 35152, two oblique grooves 35154 respectively provided on the left and right sides of the support piece 35151, and two sliding blocks 35155 respectively slidably connected to the inner sides of the two oblique grooves 35154. The rear side of the positioning block 35153 is fixed to the bin cover 3511, and the sliding block The middle side of the front part of 35155 is connected to the shift frame 3516. When the support piece 35151 is shifted by the action of the first internal thread block 3514, the support piece 35151 is stably moved laterally under the support of the positioning block 35153. After the support piece 35151 is moved laterally, the sliding block 35155 is slid into a position inside the inclined groove 35154, so that the movement of the sliding block 35155 drives the shift frame 3516 to perform a vertical shift action under the limiting action of the first side frame 3517 and the second side frame 3518.

[0037] The scraper assembly 352 includes a cover frame 3521 connected to the support assembly 351 on the front and rear sides of the top, a second motor 3522 fastened to the right side of the top of the cover frame 3521, a second threaded rod 3523 connected to the left output end of the second motor 3522, a second internally threaded block 3524 threadedly connected to the outer surface of the second threaded rod 3523, a cross plate 3525 fixedly connected to the bottom side of the second internally threaded block 3524, four shaft rods 3526 fixedly connected to the front and rear sides of the inside of the cover frame 3521, a sleeve 3527 arranged and slidable on the outer surfaces of the four shaft rods 3526, and a scraper rod 3528 fastened to the middle side of the bottom of the sleeve 3527. The cross plate 3525 is laterally slidably connected to the top side of the cover frame 3521. Under the action of the second motor 3522, the second threaded rod 3523 is threadedly connected to the second internally threaded block 352 4 makes the cross plate 3525 shift inside the cover frame 3521, eight sleeves 3527 are provided, and the connection positions between two sleeves 3527 and two shaft rods 3526 are staggered to ensure the stability of the movement of the sleeves 3527 and make each sleeve 3527 relatively close to each other, a through groove is provided on the middle side of the right part of the cover frame 3521, and the second internal thread block 3524 is penetrated and arranged on the inner side of the through groove, a protrusion is provided on the middle side of the top of the sleeve 3527, and a sliding groove 35251 is provided on the bottom side of the cross plate 3525 in an inclined shape, and the top of the protrusion is inserted and slid on the inner side of the sliding groove 35251, when the cross plate 3525 moves horizontally, the sliding groove 35251 cooperates with the protrusion to make the sleeve 3527 expand or shrink close to the moving position on the surface of the shaft rod 3526, thereby driving the scraper rod 3528 to shift to change the scraping groove spacing for UV varnish.

[0038] See also Figure 2 , Figure 8 and Fig. 9The present invention provides an automatic printing device for laser film packaging bags, wherein the flattening structure 37 comprises a positioning frame 371 fixed to the cover seat 31 at the top of the rear side, a third motor 372 fastened to the right side of the rear part of the positioning frame 371, a rotating rod 373 connected to the output end of the front part of the third motor 372, a push rod 374 rotatably connected to the right side of the front part of the rotating rod 373, a rotating head 375 rotatably connected to the other end of the pushing rod 374, and a sliding seat 376 connected to the front and rear sides of the rotating head 375. Under the action of the third motor 372, the rotating rod 373 is rotated, and the rotating rod 373 cooperates with the pushing rod 374 to make the rotating head 375 drive the sliding seat 376 to reciprocate in the left and right directions on the bottom side of the positioning frame 371, a spiral rod 377 integrally formed at the left end of the rotating head 375, an inner groove cylinder 378 connected to the outer surface of the spiral rod 377, and a gear 379 fixedly connected to the left side of the outer surface of the inner groove cylinder 378. When the screw rod 377 is driven to shift laterally, the screw rod 377 moves inside the inner groove cylinder 378 to rotate the inner groove cylinder 378 and the gear 379, meshing with the rack 3710 on the bottom side of the gear 379, the slide plate 3711 fixedly connected to the bottom of the rack 3710, and the ball 3712 rollingly set on the left end of the slide plate 3711. The rear side of the rotating rod 373 is rotatably connected to the positioning frame 371, and the top of the slide seat 376 is slidably connected to the positioning frame 371. The inner groove cylinder 378 penetrates and rotates on the middle part of the left part of the positioning frame 371. The right side of the top of the slide plate 3711 is slidably connected to the positioning frame 371 in the front-to-back direction. The gear 379 and the rack 3710 cooperate to make the slide plate 3711 reciprocate in the front-to-back direction on the bottom side of the positioning frame 371, so that the ball 3712 contacts the transfer film and then reciprocates to roll in the front-to-back direction to flatten the transfer film to eliminate the wrinkles.

[0039] Among them, the front and rear sides of the top of the slide 376 are inclined, and the inclined part is inserted and slid on the middle side of the bottom of the positioning frame 371, which plays a role of supporting displacement and ensuring that the slide 376 can stably reciprocate. There are no less than five balls 3712, and they are evenly distributed on the left end of the slide plate 3711 to increase the contact area with the transfer film and ensure the wrinkle removal effect of the transfer film. The right side of the gear 379 is rotatably connected to the positioning frame 371, and a convex ring that plays a limiting role is provided on the right side of the outer surface of the inner groove cylinder 378, which plays a limiting role and ensures that the inner groove cylinder 378 can stably rotate on the inner side of the positioning frame 371.

[0040] The automatic printing device for laser film packaging bags of the present invention has the following working principle:

[0041] First, the design is placed at the position where the packaging bag needs to be printed through the stand 1, and then the packaging bag is placed through the conveyor belt body 2 and sent into the cover seat 31, and then the transfer film with the laser pattern enters the cover seat 31 from the inside of the guide double rollers 33, and then the hose 30 is connected to the external UV varnish supply end to use the design;

[0042] Second, when the packaging bag enters the cover seat 31, the user controls to start the first motor 3512. Under the action of the first motor 3512, the first threaded rod 3513 cooperates with the first internal thread block 3514 to drive the support piece 35151 to move stably horizontally under the support of the positioning block 35153. After the support piece 35151 moves horizontally, the sliding block 35155 slides in the inclined groove 35154, so that the movement of the sliding block 35155 drives the shift frame 3516 to shift downward under the limiting action of the first side frame 3517 and the second side frame 3518. The cover frame 3521 drives the roller 354 to move downward to connect with the cover frame 3521. The second motor 3522 is controlled to start, so that the second threaded rod 3523 drives the cross plate 3525 to shift inside the cover frame 3521 through the cooperation with the second internal threaded block 3524. When the cross plate 3525 moves laterally, the sleeve 3527 is expanded on the surface of the shaft rod 3526 through the cooperation with the slide groove 35251 and the protrusion, thereby driving the scraper rod 3528 to expand to adjust the scraping groove spacing on the UV varnish.

[0043] Third, after the transfer film with the laser pattern enters the cover seat 31, the transfer film contacts the ball 3712 and passes through the metal roller 38 before entering the bottom of the first pressure assembly 40. During the transfer film conveying and moving process, the metal roller 38 and the ion blower 36 eliminate the static electricity on the transfer film, and the third motor 372 can be controlled to start. Under the action of the third motor 372, the rotating rod 373 rotates. The rotating rod 373 cooperates with the push rod 374 to make the rotating head 375 drive the slide seat 376 to rotate. The bottom side of the positioning frame 371 reciprocates in the left and right directions. When the rotating head 375 drives the screw rod 377 to shift horizontally, the screw rod 377 moves inside the inner groove cylinder 378 to rotate the inner groove cylinder 378 and the gear 379. The gear 379 cooperates with the rack 3710 to make the slide plate 3711 and the ball 3712 reciprocate in the front-back direction on the bottom side of the positioning frame 371, so that the ball 3712 reciprocates in the front-back direction to flatten the transfer film to eliminate the generated wrinkles.

[0044] Fourth, the transfer film is pressed tightly against the packaging bag by controlling the first pressure component 40 and the second pressure component 41. After the transfer film and the packaging bag are attached, they pass under the ultraviolet curing body 39. The ultraviolet lamp of the ultraviolet curing body 39 irradiates the UV varnish on the packaging bag to solidify it, so that the laser pattern on the transfer film is separated from the transfer film and fixed to the packaging bag to complete the printing work.

[0045] The above description is only a preferred example of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An automatic printing device for laser film packaging bags, comprising a stand (1) and a conveyor belt body (2) arranged on the top side of the stand (1), characterized in that: The printing mechanism (3) is also included and installed on the top of the stand (1). The printing mechanism (3) includes a cover seat (31) fastened to the stand (1) at the front and rear sides of the bottom, a top cover (32) fastened to the top side of the cover seat (31), a guide double roller (33) rotatably arranged on the left side of the inside of the top cover (32), a partition (34) fixedly connected to the left side of the inside of the cover seat (31), an oiling structure (35) arranged on the left side of the partition (34), an ion fan (36) installed on the upper right side of the partition (34), a flattening structure (37) arranged on the lower right side of the ion fan (36), a metal roller (38) located below the flattening structure (37), an ultraviolet curing body (39) fastened to the lower right side of the inside of the cover seat (31), and a UV curing body (39) respectively arranged on the UV curing body (39). The first pressure assembly (40) and the second pressure assembly (41) are provided on the left and right sides of the external line curing body (39); the rear side of the oiling structure (35) is fastened to the cover seat (31); the ion blower (36) is located below the guide double rollers (33); the front and rear sides of the metal roller (38) are rotatably connected to the cover seat (31); the middle of the guide double rollers (33), the left end of the flattening structure (37) and the left side of the metal roller (38) are located on the same inclined plane; the oiling structure (35) comprises a supporting assembly (351) fixed to the cover seat (31) at the rear side, a scraping groove assembly (352) connected to the middle and lower side of the supporting assembly (351), a sleeve block (353) fixedly connected to the left side of the bottom of the scraping groove assembly (352), and a sleeve block (353) slidably connected to the sleeve block. The support assembly (351) comprises a roller (354) at the middle and lower side of the interior of the housing (353), a spring (355) installed on the top side of the roller (354), and an oil spray head (356) arranged on the right side of the sleeve (353), wherein the top end of the spring (355) abuts against the top side of the interior of the sleeve (353), the oil spray head (356) is fixed to the front and rear sides of the bottom of the scraper groove assembly (352), the front side of the oil spray head (356) is connected to a hose (30) for conveying UV varnish, and the front part of the hose (30) is penetrated and arranged on the lower left side of the front part of the cover seat (31); the support assembly (351) comprises a bin cover (3511) fastened to the cover seat (31) on the left side, a first motor (3512) fastened to the upper right side of the bin cover (3511), and a first motor (3512) connected to the first motor (3511). 12) a first threaded rod (3513) at the left output end, a first internally threaded block (3514) threadedly connected to the outer surface of the first threaded rod (3513), a bearing component (3515) fixedly connected to the rear side of the first internally threaded block (3514), a shift frame (3516) connected to the front side of the bearing component (3515), and a first side frame (3517) and a second side frame (3518) respectively slidably connected to the left and right sides of the shift frame (3516), the rear side of the bearing component (3515) slidingly contacts with the bin cover (3511), the bottom of the shift frame (3516) is fastened to the scraper assembly (352), and the tops of the first side frame (3517) and the second side frame (3518) are fastened to the bin cover (3511);The scraper assembly (352) comprises a cover frame (3521) connected to the support assembly (351) at the front and rear sides of the top, a second motor (3522) fastened to the right side of the top of the cover frame (3521), a second threaded rod (3523) connected to the left output end of the second motor (3522), a second internal thread block (3524) threadedly connected to the outer surface of the second threaded rod (3523), and a transverse plate (3524) fixedly connected to the bottom side of the second internal thread block (3524). 5) Four shafts (3526) fixedly connected to the front and rear sides of the cover frame (3521), sleeves (3527) arranged and sliding on the outer surface of the four shafts (3526), ​​and a scraper (3528) fastened to the middle side of the bottom of the sleeve (3527), the horizontal plate (3525) is laterally slidably connected to the top side of the cover frame (3521), and the sleeves (3527) are provided with eight pieces, and the connection positions between the two shafts (3526) are staggered. ; 2. The automatic printing device for laser film packaging bags according to claim 1, characterized in that: A windshield block (361) is arranged on the right side of the front of the ion blower (36), and the windshield block (361) is arranged to be inclined from right to left toward the front side, and is used to blow the ion-carrying airflow toward the partition (34).

3. The automatic printing device for laser film packaging bags according to claim 1, characterized in that: The first pressing assembly (40) and the second pressing assembly (41) have the same structure and size and are located at the same height. The second pressing assembly (41) comprises an electric push rod (411) whose rear top side is fixed to the cover seat (31), a pressure roller frame (412) connected to the output shaft at the bottom of the electric push rod (411), and protective plates (413) arranged on the left and right sides of the pressure roller frame (412) to play a limiting role. The rear side of the protective plate (413) is fixed to the cover seat (31).

4. The automatic printing device for laser film packaging bags according to claim 1, characterized in that: The bearing component (3515) comprises a support piece (35151) whose rear side is in sliding contact with the bin cover (3511), two transverse grooves (35152) provided on the top side of the support piece (35151), two positioning blocks (35153) respectively slidably connected to the inner sides of the two transverse grooves (35152), two oblique grooves (35154) respectively provided on the left and right sides of the support piece (35151), and two sliding blocks (35155) respectively slidably connected to the inner sides of the two oblique grooves (35154), the rear side of the positioning block (35153) is fixed to the bin cover (3511), and the front middle side of the sliding block (35155) is connected to the shift frame (3516).

5. The automatic printing device for laser film packaging bags according to claim 1, characterized in that: A through groove is provided on the middle side of the right part of the cover frame (3521), and a second internal thread block (3524) is arranged through the inner side of the through groove, a protrusion is provided on the middle side of the top of the sleeve (3527), and a sliding groove (35251) is provided on the bottom side of the cross plate (3525) in an inclined shape, and the top of the protrusion is inserted and slid on the inner side of the sliding groove (35251).

6. The automatic printing device for laser film packaging bags according to claim 1, characterized in that: The flattening structure (37) comprises a positioning frame (371) fixed to the top of the rear side and the cover seat (31), a third motor (372) fastened to the rear right side of the positioning frame (371), a rotating rod (373) connected to the front output end of the third motor (372), a push rod (374) rotatably connected to the front right side of the rotating rod (373), a rotating head (375) rotatably connected to the other end of the push rod (374), a sliding seat (376) connected to the front and rear sides of the rotating head (375), a spiral rod (377) integrally formed at the left end of the rotating head (375), an inner groove cylinder (378) connected to the outer surface of the spiral rod (377), and a fixed connecting rod (374). A gear (379) connected to the left side of the outer surface of the inner groove cylinder (378), a rack (3710) meshingly transmitted with the bottom side of the gear (379), a slide plate (3711) fixedly connected to the bottom of the rack (3710), and a ball (3712) rollingly arranged on the left end of the slide plate (3711); the rear side of the rotating rod (373) is rotatably connected to the positioning frame (371); the top of the sliding seat (376) is slidably connected to the positioning frame (371); the inner groove cylinder (378) penetrates and rotates on the middle part of the left part of the positioning frame (371); the right side of the top of the slide plate (3711) is slidably connected to the positioning frame (371) in the front-rear direction.

7. The automatic printing device for laser film packaging bags according to claim 6, characterized in that: The front and rear sides of the top of the slide seat (376) are both inclined, and the inclined portion is inserted and slid on the middle side of the bottom of the positioning frame (371). No less than five balls (3712) are provided and are evenly distributed on the left end of the slide plate (3711). The right side of the gear (379) is rotatably connected to the positioning frame (371). The right side of the outer surface of the inner groove cylinder (378) is provided with a convex ring that plays a limiting role.

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