Aluminum-plastic paper high intaglio printing device

Abstract

The utility model discloses an aluminum-plastic paper high intaglio printing device which comprises a roll paper discharging rack, a printing workbench, a roll paper discharging mechanism, a paper guiding mechanism and a high intaglio printing mechanism, wherein the roll paper discharging mechanism and the paper guiding mechanism are arranged on the roll paper discharging rack, and the high intaglio printing mechanism is arranged on the printing workbench. And to-be-printed aluminum-plastic roll paper is arranged on the roll paper discharging mechanism. By means of the scheme, the feeding device has the advantages of being simple in structure, high in flexibility, reliable in feeding and the like, and has high practical value and popularization value in the technical field of printing.

Description

TECHNICAL FIELD

[0001] The utility model relates to printing technical field especially high gravure printing device of aluminium -plastic paper. BACKGROUND

[0002] The aluminium -plastic paper of the present technology is also called paper aluminium -plastic composite film or bag, which is a kind of multilayer composite material composed of paper, aluminium foil and plastic. This material combines the air permeability of paper, the barrier property of aluminium and the flexibility of plastic, and has the characteristics of light weight, high strength and superior barrier property. Aluminium -plastic paper is widely used, mainly applied in food packaging, medicine packaging and electronic product packaging fields. In the field of food packaging, it can provide the characteristics of moisture-proof, mildew-proof, light-proof and oxidation-resistant. Among them, high gravure printing is simply called gravure printing, which is a direct printing method, and its characteristic is to use the pits engraved on the plate to carry ink, and transfer the ink from the pits to the printing material by pressure. This high gravure printing has the advantages of high image definition, good anti-counterfeiting performance, strong printing resistance and wide printing material.

[0003] At present, the high gravure printing device in the prior art, such as the disclosed technology with the publication number CN118721993A and the name of an automatic gravure printing device for color paper printing, comprises a printing main body, an ink box installed at the bottom side of the printing main body, and a printing roller installed at the bottom side of the printing main body, a driving motor for adjusting the height of the ink box is installed inside the printing main body, sliding blocks are installed at the two sides of the ink box, support tables are symmetrically installed inside the printing main body, a rotating lead screw is installed at the upper side of the support table, the rotating lead screw is in sliding fit with the sliding blocks, and the output shaft of the driving motor is in transmission fit with the rotating lead screw; a cleaning block for cleaning the printing roller is installed inside the printing main body, first and second wiping cloths for wiping the printing roller are rotatably installed at the front side of the cleaning block, and a driving rack is installed inside the printing main body, the driving rack is used for driving the first and second wiping cloths to rotate. For example, the disclosed technology with the publication number CN119116529A and the name of a green and environment-friendly printing device and printing process for paper product production, which comprises a gravure printing machine body, a paper inlet is formed in one side of the gravure printing machine body, a first limiting cylinder, a second limiting cylinder, a pressing cylinder, a third limiting cylinder, a fourth limiting cylinder and a fifth limiting cylinder are sequentially arranged inside the gravure printing machine body, a UV photolysis purification mechanism is arranged above the fifth limiting cylinder, a sixth limiting cylinder is arranged above the UV photolysis purification mechanism, an activated carbon adsorption device is arranged at one side of the sixth limiting cylinder, a paper outlet is formed at the upper end of the paper inlet, a printing roller is arranged below the pressing cylinder, an ink scraping mechanism is arranged at one side of the printing roller, an upper ink roller is arranged below the printing roller, and an ink tank is arranged below the upper ink roller. The above technologies all adopt multiple rollers to drive the movement and printing of the paper, but they cannot guide and position the paper feeding, and problems such as paper deviation and displacement may exist. In addition, the above technologies cannot meet the printing requirements of paper with different thicknesses.

[0004] Therefore, it is urgent to provide an aluminum-plastic paper high gravure printing device which is simple in structure, high in flexibility and reliable in feeding. Content of the utility model

[0005] In view of the above problems, the purpose of the utility model is to provide an aluminum-plastic paper high gravure printing device, and the technical scheme adopted by the utility model is as follows.

[0006] An aluminum-plastic paper high gravure printing device is used for feeding and printing aluminum-plastic roll paper, which comprises a roll paper feeding rack, a printing workbench, a roll paper feeding mechanism and a paper guiding mechanism arranged on the roll paper feeding rack, and a high gravure printing mechanism arranged on the printing workbench; the roll paper feeding mechanism is provided with aluminum-plastic roll paper to be printed;

[0007] The paper guiding mechanism comprises a U-shaped lower support base fixed on a paper roll feeding rack, a top cover arranged on the top of the U-shaped lower support base, a plurality of first lower support rollers arranged in the U-shaped lower support base along the printing feeding direction, a first discharge support roller arranged at the rear end of the U-shaped lower support base, a plurality of first adjusting grooves respectively arranged on the side edges of the U-shaped lower support base, first sliding seats sleeved in the first adjusting grooves, a first transverse connecting rod connected between the first sliding seats, first upper support rollers arranged between the first sliding seats and matched with the first lower support rollers one by one, a longitudinal connecting screw assembly connected between the first transverse connecting rod and the top cover, a first adjusting screw fixedly connected with the first sliding seat at the lower part and arranged through the top cover, a first end connecting nut assembly arranged at the top of the first adjusting screw, a first spring sleeved on the first adjusting screw and pressed between the top cover and the first end connecting nut assembly, a transverse adjusting groove plate arranged between the rear ends of the U-shaped lower support base, a transverse adjusting groove arranged in the transverse adjusting groove plate, and a longitudinal support roller arranged in the transverse adjusting groove; the U-shaped lower support base is provided with a driving motor connected with the first lower support roller or the first upper support roller;

[0008] The high gravure printing mechanism comprises first and second mounting seats fixed on a printing workbench and having the same structure, a plurality of connecting rod assemblies arranged between the first and second mounting seats, a plurality of feeding transition roller assemblies and discharge transition roller assemblies arranged between the first and second mounting seats and each comprising a plurality of rollers, and a plurality of rollers arranged between the first and second mounting seats from top to bottom, namely a pressing roller, a printing roller, an inking roller and an ink tank; the pressing roller is provided with a longitudinal adjusting mechanism; the longitudinal adjusting mechanism drives the pressing roller to press the printing roller and the inking roller; the printing roller is provided with a printing roller driving servo motor.

[0009] Further, the connecting rod assembly comprises second and third transverse connecting rods connected between the first and second mounting seats; the second transverse connecting rod is arranged between the lower ends of the first and second mounting seats; and the third transverse connecting rod is arranged between the upper ends of the first and second mounting seats.

[0010] Further, the feeding transition roller assembly comprises first, second and third feeding transition rollers arranged between the first and second mounting seats; the first, second and third feeding transition rollers are arranged on the feeding side of the first and second mounting seats.

[0011] Further, the first mounting seat and the second mounting seat are provided with a horizontal groove; the ends of the inking roller are provided with a third bearing seat respectively; the ends of the inking roller are arranged in the horizontal groove, and the third bearing seat is fixed on the first mounting seat and the second mounting seat.

[0012] Further, the first mounting seat and the second mounting seat are provided with a horizontal groove; the ends of the inking roller are provided with a third bearing seat respectively; the ends of the inking roller are arranged in the horizontal groove, and the third bearing seat is fixed on the first mounting seat and the second mounting seat.

[0013] Further, the first mounting seat and the second mounting seat are provided with a horizontal groove; the ends of the inking roller are provided with a third bearing seat respectively; the ends of the inking roller are arranged in the horizontal groove, and the third bearing seat is fixed on the first mounting seat and the second mounting seat.

[0014] Further, the paper roll feeding mechanism comprises a feeding rotating shaft arranged on the paper roll feeding rack, an aluminum plastic roll supporting disc fixed on the feeding rotating shaft, a center supporting cylinder sleeved on the feeding rotating shaft, a plurality of aluminum plastic roll supporting and limiting mechanisms arranged on the center supporting cylinder in a ring shape and uniformly spaced, and a feeding tightening mechanism arranged between the paper roll feeding rack and the feeding rotating shaft; the end of the center supporting cylinder is provided with a connecting nut disc.

[0015] Further, the paper roll feeding mechanism comprises a feeding rotating shaft arranged on the paper roll feeding rack, an aluminum plastic roll supporting disc fixed on the feeding rotating shaft, a center supporting cylinder sleeved on the feeding rotating shaft, a plurality of aluminum plastic roll supporting and limiting mechanisms arranged on the center supporting cylinder in a ring shape and uniformly spaced, and a feeding tightening mechanism arranged between the paper roll feeding rack and the feeding rotating shaft; the end of the center supporting cylinder is provided with a connecting nut disc.

[0016] Further, the paper roll feeding mechanism comprises a feeding rotating shaft arranged on the paper roll feeding rack, an aluminum plastic roll supporting disc fixed on the feeding rotating shaft, a center supporting cylinder sleeved on the feeding rotating shaft, a plurality of aluminum plastic roll supporting and limiting mechanisms arranged on the center supporting cylinder in a ring shape and uniformly spaced, and a feeding tightening mechanism arranged between the paper roll feeding rack and the feeding rotating shaft; the end of the center supporting cylinder is provided with a connecting nut disc.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] (1) the utility model discloses a aluminium plastic paper support disc, center support cylinder and aluminium plastic paper support limiting mechanism are set up, and the first sliding groove is set up on the aluminium plastic paper support disc, sets up the connecting nut disc on the center support cylinder, utilizes the first elbow arm adjustment several support arc plate and is with the diameter of support component, to realize reliable support to aluminium plastic paper.

[0019] (2) the utility model discloses a material feeding take-up mechanism, and the tightness of connecting belt is adjusted by screw hand wheel, to adjust the friction between connecting belt and belt pulley, guarantee the stable and reliable material feeding of paper roll feeding mechanism, effectively avoid the unreliable printing caused by material feeding too fast.

[0020] (3) the utility model discloses a paper guiding mechanism, and utilize first lower support roller and first upper support roller and extrude transmission, then utilize horizontal adjustment groove plate and longitudinal support roller and guide, guarantee the reliability of feeding.

[0021] (4) the utility model discloses a plurality of feeding transition roller assemblies and discharge transition roller assemblies are set up on the high gravure printing mechanism, to guarantee its printing support reliability. In addition, the utility model discloses a liftable and adjustable press roller, and the printing roller and the inking roller are extruded, to adapt to the printing of aluminium plastic paper of different thickness, and it is flexible and reliable.

[0022] In conclusion, the utility model has the advantages of simple structure, high flexibility, reliable feeding and the like, and has high practical value and popularization value in the field of printing technology. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments, and should understand that the following drawings only show some embodiments of the utility model, and should not be regarded as the limitation to the protection scope, and for the person skilled in the art, can also obtain other related drawings according to these drawings without the creative labor.

[0024] Figure 1 It is the structural schematic diagram of the utility model.

[0025] Figure 2 It is the structural schematic diagram of the first angle of paper roll feeding mechanism in the utility model.

[0026] Figure 3 It is the structural schematic diagram of the second angle of paper roll feeding mechanism in the utility model.

[0027] Figure 4 It is the structural schematic diagram of paper guiding mechanism in the utility model.

[0028] Figure 5 It is a cross section schematic view of the paper guiding mechanism in the utility model.

[0029] Figure 6 It is a structure schematic view of the first angle of the high gravure printing mechanism in the utility model.

[0030] Figure 7 It is a structure schematic view of the second angle of the high gravure printing mechanism in the utility model.

[0031] Figure 8 It is a local enlarged view of the high gravure printing mechanism in the utility model.

[0032] In the above-mentioned drawing, the component name corresponding to the reference sign is as follows:

[0033] 1, paper roll feeding frame; 2, paper roll feeding mechanism; 3, paper guiding mechanism; 4, printing workbench; 5, high gravure printing mechanism; 21, feeding rotary shaft; 22, feeding tightening mechanism; 23, aluminum plastic paper roll supporting disc; 24, center supporting cylinder; 25, aluminum plastic paper roll supporting limiting mechanism; 221, pulley; 222, first connecting belt mounting seat; 223, connecting belt; 224, second connecting belt mounting seat; 225, screw hand wheel; 231, first sliding groove; 241, connecting nut disc; 251, first crank arm; 252, supporting arc plate; 253, side support frame; 30, U-shaped lower support seat; 31, first discharging supporting roller; 32, first lower supporting roller; 33, first adjusting groove; 34, first sliding seat; 35, first adjusting screw; 36, first spring; 37, first end connecting nut assembly; 38, transverse adjusting groove plate; 39, longitudinal supporting roller; 301, top cover; 341, first transverse connecting rod; 342, longitudinal connecting screw assembly; 343, first upper supporting roller; 501, first mounting seat; 502, second mounting seat; 503, second transverse connecting rod; 504, third transverse connecting rod; 505, first feeding transition roller; 506, second feeding transition roller; 507, third feeding transition roller; 508, first discharging transition roller; 509, second discharging transition roller; 510, pressing roller; 511, printing roller; 512, inking roller; 513, ink groove; 514, third discharging transition roller; 5011, transverse groove; 5012, second adjusting groove; 5013, sliding rail assembly; 5014, driving servo motor mounting plate; 5101, first bearing seat; 5102, longitudinal adjusting module; 5111, printing roller driving servo motor; 5112, second bearing seat; 5121, third bearing seat. DETAILED DESCRIPTION

[0034] For the purposes of the present application, the technical solutions and advantages thereof are more apparent, the present application will be further described below in conjunction with the drawings and examples, the embodiments of the present application include but are not limited to the following examples. Based on the examples in the present application, all other examples obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0035] In the present embodiment, the term "and / or" is merely a description of the association relationship of the associated objects, which means that there can be three kinds of relationships, for example, A and / or B can represent the following three cases: A exists alone, A and B exist simultaneously, and B exists alone.

[0036] The terms "first" and "second" and the like in the description and claims of the present embodiment are used to distinguish different objects, and are not used to describe the specific order of the objects. For example, the first target object and the second target object are used to distinguish different target objects, and are not used to describe the specific order of the target objects.

[0037] In the embodiments of the present application, the words "exemplary" or "for example" are used to mean serving as an example, instance, or illustration. Any embodiment or design solution described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or advantageous than other embodiments or design solutions. Rather, the use of the words "exemplary" or "for example" is intended to present relevant concepts in a concrete manner.

[0038] In the description of the embodiments of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more. For example, a plurality of processing units refers to two or more processing units; a plurality of systems refers to two or more systems.

[0039] As shown in Figures 1 to 8 The present embodiment provides an aluminum plastic paper high gravure printing device, which feeds and prints aluminum plastic paper. Specifically, the aluminum plastic paper high gravure printing device comprises a paper feeding rack 1 and a printing workbench 4, a paper feeding mechanism 2 and a paper guiding mechanism 3 arranged on the paper feeding rack 1, and a high gravure printing mechanism 5 arranged on the printing workbench 4.

[0040] The aluminum-plastic roll paper to be printed is arranged on the roll paper feeding mechanism 2. The roll paper feeding mechanism 2 of the embodiment comprises a feeding shaft 21 rotatably arranged on the roll paper feeding frame 1, an aluminum-plastic roll paper support disc 23 fixed on the feeding shaft 21, a center support cylinder 24 sleeved on the feeding shaft 21, a plurality of aluminum-plastic roll paper support limiting mechanisms 25 arranged in a ring shape on the center support cylinder 24 and supporting the aluminum-plastic roll paper, and a feeding tightening mechanism 22 arranged between the roll paper feeding frame 1 and the feeding shaft 21. The end of the center support cylinder 24 is provided with a connecting nut disc 241.

[0041] In order to avoid the feeding of the roll paper feeding mechanism 2 being too fast and to ensure stable and reliable feeding, the feeding tightening mechanism 22 comprises a first connecting belt mounting seat 222 fixed on the inner wall of the roll paper feeding frame 1, a belt pulley 221 sleeved on the feeding shaft 21, a connecting belt 223 having one end connected with the first connecting belt mounting seat 222 and being arranged around the belt pulley 221, a second connecting belt mounting seat 224 connected with the other end of the connecting belt 223, and a screw hand wheel 225 threadedly connected with the roll paper feeding frame 1, connected with the second connecting belt mounting seat 224 and adjusting the tightness of the connecting belt 223. Here, the screw hand wheel 225 is adjusted to change the frictional resistance of the belt pulley 221 and the connecting belt 223 to achieve stable feeding.

[0042] In the embodiment, a support roll is arranged in the aluminum-plastic roll paper. In order to cope with support rolls of different diameters, a plurality of first sliding grooves 231 are arranged on the aluminum-plastic roll paper support disc 23, and the first sliding grooves 231 correspond one-to-one to the aluminum-plastic roll paper support limiting mechanisms 25. The connecting nut disc 241 is adjusted to change the diameters of the plurality of support arc plates 252 in the embodiment. Specifically, any of the aluminum-plastic roll paper support limiting mechanisms 25 comprises a plurality of first crank arms 251 having one end axially connected with the center support cylinder 24, a support arc plate 252 axially connected with the other end of the first crank arm 251, and two side support frames 253 respectively clamped on the ends of the support arc plate 252. The support arc plate 252 slides along the first sliding groove 231 at one end. When the aluminum-plastic roll paper needs to be installed, the side support frame 253 far from the aluminum-plastic roll paper support disc 23 is removed and installed, and then the side support frame 253 is installed.

[0043] The paper guiding mechanism 3 is arranged to guide the paper feeding of the paper feeding mechanism 2. Specifically, the paper guiding mechanism 3 comprises a U-shaped lower support seat 30 fixed to the paper feeding rack 1, a top cover 301 arranged at the top of the U-shaped lower support seat 30, a plurality of first lower support rollers 32 arranged in the U-shaped lower support seat 30 along the printing feeding direction, a first discharge support roller 31 arranged at the rear end of the U-shaped lower support seat 30, a plurality of first adjusting grooves 33 respectively arranged at the side edges of the U-shaped lower support seat 30, first sliding seats 34 sleeved in the first adjusting grooves 33, a first transverse connecting rod 341 connected between the first sliding seats 34, first upper support rollers arranged between the first sliding seats 34 and corresponding to the first lower support rollers 32, a longitudinal connecting screw assembly 342 connected between the first transverse connecting rod 341 and the top cover 301, a first adjusting screw 35 fixedly connected with the first sliding seats 34 at the lower part and arranged through the top cover 301, a first end connecting nut assembly 37 arranged at the top of the first adjusting screw 35, a first spring 36 sleeved on the first adjusting screw 35 and pressed between the top cover 301 and the first end connecting nut assembly 37, a transverse adjusting groove plate 38 arranged between the rear ends of the U-shaped lower support seat 30, a transverse adjusting groove arranged in the transverse adjusting groove plate 38, and a longitudinal support roller 39 arranged in the transverse adjusting groove. The first lower support rollers 32 and the first upper support rollers press the aluminum plastic paper to run, and the transverse position of the aluminum plastic paper is adjusted by the transverse adjusting groove plate 38 and the longitudinal support roller 39.

[0044] In the embodiment, the high gravure printing mechanism 5 comprises a first mounting seat 501 and a second mounting seat 502 fixed to the printing workbench 4 and having the same structure, a plurality of connecting rod assemblies arranged between the first mounting seat 501 and the second mounting seat 502, a plurality of feeding transition roller assemblies and discharge transition roller assemblies arranged between the first mounting seat 501 and the second mounting seat 502 and each comprising a plurality of connecting rod assemblies, and a pressing roller 510, a printing roller 511, an inking roller 512 and an ink tank 513 arranged between the first mounting seat 501 and the second mounting seat 502 in sequence from top to bottom. The pressing roller 510 is provided with a longitudinal adjusting mechanism, and the longitudinal adjusting mechanism drives the pressing roller 510 to press the printing roller 511 and the inking roller 512. The printing roller 511 is provided with a printing roller driving servo motor 5111 to drive the printing roller 511 to print. The ink tank 513 is provided with printing ink, and printing is performed between the printing roller 511 and the inking roller 512.

[0045] In the embodiment, the second transverse connecting rod 503 and the third transverse connecting rod 504 are arranged between the first mounting seat 501 and the second mounting seat 502. The second transverse connecting rod 503 is arranged between the lower ends of the first mounting seat 501 and the second mounting seat 502, and the third transverse connecting rod 504 is arranged between the upper ends of the first mounting seat 501 and the second mounting seat 502. In addition, the feeding transition roller assembly includes the first feeding transition roller 505, the second feeding transition roller 506 and the third feeding transition roller 507 arranged between the first mounting seat 501 and the second mounting seat 502. The discharging transition roller assembly includes the first discharging transition roller 508, the second discharging transition roller 509 and the third discharging transition roller 514 arranged between the first mounting seat 501 and the second mounting seat 502. The first feeding transition roller 505, the second feeding transition roller 506 and the third feeding transition roller 507 are arranged on the feeding side of the first mounting seat 501 and the second mounting seat 502. The first discharging transition roller 508, the second discharging transition roller 509 and the third discharging transition roller 514 are arranged on the discharging side of the first mounting seat 501 and the second mounting seat 502.

[0046] In the embodiment, in order to reliably install the inking roller 512, a horizontal groove 5011 is formed on the first mounting seat 501 and the second mounting seat 502, and a third bearing seat 5121 is arranged at the end of the inking roller 512. The end of the inking roller 512 is arranged in the horizontal groove 5011, and the third bearing seat 5121 is fixed on the first mounting seat 501 and the second mounting seat 502.

[0047] In the embodiment, in order to adjust the pressing roller 510 and the printing roller 511, a second adjusting groove 5012 is formed in the longitudinal direction of the first mounting seat 501 and the second mounting seat 502, and a slide rail assembly 5013 is arranged on the side of the first mounting seat 501 and the second mounting seat 502. A first bearing seat 5101 is arranged at the end of the pressing roller 510, and a second bearing seat 5112 is arranged at the end of the printing roller 511. The first bearing seat 5101 and the second bearing seat 5112 are slidably connected with the slide rail assembly 5013. A driving servo motor mounting plate 5014 is arranged on the top of the first mounting seat 501 and the second mounting seat 502, and a longitudinal adjusting module 5102 is arranged on the driving servo motor mounting plate 5014. The longitudinal adjusting module 5102 is connected with the first bearing seat 5101 and adjusts the movement of the pressing roller 510 along the second adjusting groove 5012. The longitudinal adjusting module 5102 drives the pressing roller 510 to move along the longitudinal direction and press on the printing roller 511. The printing roller 511 is pressed on the inking roller 512, the inking roller 512 is used for inking, and printing is performed between the printing roller 511 and the inking roller 512.

[0048] The above embodiments are only preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, but any change made on the basis of the design principle of the present application and non-creative labor shall belong to the protection scope of the present application.

Claims

1. A high gravure printing device for aluminum-plastic paper, which unwinds and prints aluminum-plastic paper rolls, characterized in that: The utility model provides a high gravure printing mechanism, paper feeding mechanism, paper guiding mechanism and printing platform, and the paper feeding mechanism is arranged on the paper feeding mechanism frame, and the paper guiding mechanism is arranged on the printing platform, and the high gravure printing mechanism is arranged on the printing platform. The paper guiding mechanism (3) comprises a U-shaped lower support base (30) fixed to the paper feeding mechanism frame (1), a top cover (301) arranged at the top of the U-shaped lower support base (30), a plurality of first lower support rollers (32) arranged in the U-shaped lower support base (30) along the printing feeding direction, a first discharge support roller (31) arranged at the rear end of the U-shaped lower support base (30), a plurality of first adjusting grooves (33) respectively formed in the side edges of the U-shaped lower support base (30), first sliding seats (34) sleeved in the first adjusting grooves (33), first transverse connecting rods (341) connected between the first sliding seats (34), first upper support rollers (343) arranged between the first sliding seats (34) and matched with the first lower support rollers (32) one by one, longitudinal connecting screw assemblies (342) connected between the first transverse connecting rods (341) and the top cover (301), first adjusting screws (35) fixedly connected with the first sliding seats (34) at the lower part and arranged through the top cover (301), first end connecting nut assemblies (37) arranged at the top of the first adjusting screws (35), first springs (36) sleeved on the first adjusting screws (35) and pressed between the top cover (301) and the first end connecting nut assemblies (37), transverse adjusting groove plates (38) arranged between the rear ends of the U-shaped lower support base (30), transverse adjusting grooves formed in the transverse adjusting groove plates (38) and longitudinal support rollers (39) arranged in the transverse adjusting grooves; the U-shaped lower support base (30) is provided with driving motors connected with the first lower support rollers (32) or the first upper support rollers. The high gravure printing mechanism (5) comprises first mounting seats (501) and second mounting seats (502) fixed to the printing platform (4) and having the same structure, a plurality of connecting rod assemblies arranged between the first mounting seats (501) and the second mounting seats (502), a plurality of feeding transition roller assemblies and discharge transition roller assemblies arranged between the first mounting seats (501) and the second mounting seats (502) and each comprising a plurality of connecting rods, and a pressing roller (510), a printing roller (511), an inking roller (512) and an ink groove (513) sequentially arranged from top to bottom between the first mounting seats (501) and the second mounting seats (502); the pressing roller (510) is provided with a longitudinal adjusting mechanism; the longitudinal adjusting mechanism drives the pressing roller (510) to extrude the printing roller (511) and the inking roller (512); the printing roller (511) is provided with a printing roller driving servo motor (5111).

2. The aluminum plastic paper high gravure printing device according to claim 1, characterized in that, The connecting rod assembly comprises a second transverse connecting rod (503) and a third transverse connecting rod (504) connected between the first mounting seat (501) and the second mounting seat (502); the second transverse connecting rod (503) is arranged between the lower ends of the first mounting seat (501) and the second mounting seat (502); and the third transverse connecting rod (504) is arranged between the upper ends of the first mounting seat (501) and the second mounting seat (502).

3. The aluminum plastic paper high gravure printing device according to claim 1, characterized in that, The feeding transition roller assembly comprises a first feeding transition roller (505), a second feeding transition roller (506) and a third feeding transition roller (507) arranged between the first mounting seat (501) and the second mounting seat (502); and the first feeding transition roller (505), the second feeding transition roller (506) and the third feeding transition roller (507) are arranged on the feeding side of the first mounting seat (501) and the second mounting seat (502).

4. The aluminum plastic paper high gravure printing device according to claim 1, characterized in that, The discharging transition roller assembly comprises a first discharging transition roller (508), a second discharging transition roller (509) and a third discharging transition roller (514) arranged between the first mounting seat (501) and the second mounting seat (502); and the first discharging transition roller (508), the second discharging transition roller (509) and the third discharging transition roller (514) are arranged on the discharging side of the first mounting seat (501) and the second mounting seat (502).

5. A flexographic printing unit as claimed in claim 1 or 2 or 3 or 4, characterized in that The first mounting seat (501) and the second mounting seat (502) are each provided with a horizontal groove (5011); the ends of the inking roller (512) are respectively provided with third bearing seats (5121); the ends of the inking roller (512) are arranged in the horizontal groove (5011), and the third bearing seats (5121) are fixed on the first mounting seat (501) and the second mounting seat (502).

6. A flexographic printing unit as claimed in claim 1 or 2 or 3 or 4, characterized in that The first mounting seat (501) and the second mounting seat (502) are each provided with a second adjusting groove (5012) in the longitudinal direction; the first mounting seat (501) and the second mounting seat (502) are respectively provided with slide rail assemblies (5013) on the sides; the ends of the pressing roller (510) are respectively provided with first bearing seats (5101), and the ends of the printing roller (511) are respectively provided with second bearing seats (5112); the first bearing seats (5101), the second bearing seats (5112) and the slide rail assemblies (5013) are in sliding connection; the first mounting seat (501) and the second mounting seat (502) are respectively provided with driving servo motor mounting plates (5014) on the top portions; the driving servo motor mounting plates (5014) are provided with longitudinal adjusting modules (5102); the longitudinal adjusting modules (5102) are connected with the first bearing seats (5101) and adjust the movement of the pressing roller (510) along the direction of the second adjusting groove (5012).

7. The aluminum plastic paper high gravure printing device according to claim 1, characterized in that, The paper roll feeding mechanism (2) comprises a feeding rotating shaft (21) rotatably arranged on a paper roll feeding frame (1), an aluminum plastic paper supporting disc (23) fixed on the feeding rotating shaft (21), a central supporting cylinder (24) sleeved on the feeding rotating shaft (21), a plurality of aluminum plastic paper supporting and limiting mechanisms (25) arranged in a ring shape on the central supporting cylinder (24) and supporting the aluminum plastic paper, and a feeding and tightening mechanism (22) arranged between the paper roll feeding frame (1) and the feeding rotating shaft (21); and an end of the central supporting cylinder (24) is provided with a connecting nut disc (241).

8. The aluminum plastic paper high gravure printing device according to claim 7, characterized in that, A plurality of first sliding grooves (231) are formed on the aluminum plastic paper supporting disc (23); the first sliding grooves (231) correspond to the aluminum plastic paper supporting and limiting mechanisms (25) one by one; any one of the aluminum plastic paper supporting and limiting mechanisms (25) comprises a plurality of first crank arms (251) with one end being axially connected to the central supporting cylinder (24), a supporting arc plate (252) with the other end being axially connected to the first crank arms (251), and two side supporting frames (253) respectively clamped at the ends of the supporting arc plate (252); and one end of the supporting arc plate (252) slides along the first sliding groove (231).

9. The aluminum plastic paper high gravure printing device according to claim 7 or 8, characterized in that, The feeding and tightening mechanism (22) comprises a first connecting belt mounting seat (222) fixed on the inner wall of the paper roll feeding frame (1), a belt pulley (221) sleeved on the feeding rotating shaft (21), a connecting belt (223) with one end connected to the first connecting belt mounting seat (222) and arranged around the belt pulley (221), a second connecting belt mounting seat (224) connected to the other end of the connecting belt (223), and a screw hand wheel (225) threadedly connected to the paper roll feeding frame (1), connected to the second connecting belt mounting seat (224) and adjusting the tightness of the connecting belt (223).

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