CN111347758A - Gravure printing process and equipment for paper packaging box - Google Patents
Gravure printing process and equipment for paper packaging box Download PDFInfo
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- CN111347758A CN111347758A CN202010351386.6A CN202010351386A CN111347758A CN 111347758 A CN111347758 A CN 111347758A CN 202010351386 A CN202010351386 A CN 202010351386A CN 111347758 A CN111347758 A CN 111347758A
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- printing
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- roller
- drying
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F9/00—Rotary intaglio printing presses
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F19/00—Apparatus or machines for carrying out printing operations combined with other operations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
- B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
- B41F23/0403—Drying webs
- B41F23/0406—Drying webs by radiation
- B41F23/0409—Ultra-violet dryers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/10—Intaglio printing ; Gravure printing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
- B41M7/0081—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using electromagnetic radiation or waves, e.g. ultraviolet radiation, electron beams
Abstract
The invention discloses a gravure printing process for a paper packaging box and equipment thereof, which are carried out according to the following steps: decomposing the patterns to be printed according to the color levels, and respectively engraving the decomposed patterns on the printing roller in a laser mirror image manner; mounting the printing roller on the corresponding printing assembly, and adjusting the distance between the printing roller and the paper pressing roller; preparing printing ink, printing, drying for the first time, printing, drying for the second time, and aligning line pressing and stacking; the multi-image to be printed is subjected to layering processing, wherein the printing is superposition printing, the 3D effect of the image is improved by the superposition printing, and meanwhile, the superposed part is subjected to color fusion, so that the edge part is more fuzzy and softer, and the image effect after printing is improved; the printing effect of the prepared printing ink is good, the color and luster are more uniform, no peculiar smell exists in the generation process, the environment is more protected, the automation degree of production equipment is high, the processing precision of pressing lines is high, the labor intensity of workers is reduced, and the production efficiency is improved.
Description
Technical Field
The invention relates to the technical field of packaging box printing, in particular to a gravure printing process for a paper packaging box and equipment thereof.
Background
The intaglio printing is that the whole surface of printing plate is coated with ink, then the ink in blank portion is removed by using special ink-scraping mechanism, so that the ink can be remained in the cell of image-text portion, and under the action of larger pressure the ink can be transferred to the surface of printing material so as to obtain the invented printed matter. Gravure printing belongs to direct printing. The image-text part of the printing plate is concave, the concave degree is different with the depth of the image layer, and the blank part of the printing plate is convex and is on the same plane.
Traditional paper packing carton is in printing process, all is once only to printing the image on the packing carton, and the image comparison plane of this kind of printing out, and the separation of colour is more salient in the image, and the transition between the image is more harsh, and softness is relatively poor, influences whole image simulation nature, and the picture of printing out simultaneously is too plane, does not have the third dimension, uses the packing carton for a long time, and the image appears losing colour seriously.
Disclosure of Invention
Aiming at the problems in the related art, the invention provides a gravure printing process and equipment for a paper packaging box, which can perform image-division printing on a required image, improve the simulation of the image and simultaneously ensure that the printed image does not fade.
Therefore, the invention adopts the following specific technical scheme:
the gravure printing process for the paper packaging box comprises the following steps:
s1: decomposing the patterns to be printed according to the color levels, respectively engraving the decomposed patterns on the printing roller in a laser mirror image mode, and determining the depth of the engraved patterns on the printing roller according to the ink thickness of the printed patterns when the laser mirror image engraving is carried out so as to finish the engraving of the printing roller;
s2: installing the engraved printing roller on the corresponding printing component according to the printing order, and adjusting the distance between the printing roller and the paper pressing roller;
s3: preparing ink; mixing ink printed by different patterns, adding the ink mixed with different patterns into a corresponding printing machine, idling a printing roller in an ink tank of the ink, and dampening and stirring;
s4: printing, namely putting paper to be printed into a paper feeding assembly, wherein the paper feeding assembly feeds the paper into printing assemblies which are sequentially connected for printing different patterns, and the printing time of each printing assembly is 6-8 s;
s5: drying for the first time, and curing and drying the printed paper by ultraviolet irradiation at the temperature of 40-60 ℃;
s6: performing oil printing; feeding the paper subjected to primary drying into an mimeograph, and printing a comprehensive oil layer on the pattern surface of the paper subjected to primary drying;
s7: secondary drying, wherein the paper printed by the comprehensive oil layer is subjected to secondary curing and drying through ultraviolet irradiation, and the curing and drying temperature is 40-50 ℃;
s8: and the paper after secondary drying enters the line pressing assembly (4) to perform line pressing work on the edge of the paper, and the paper after the line is stacked is neat.
The ink prepared in the step S2 comprises 10-20% of colored ink and 80-90% of blended ink by mass;
the blended ink is prepared from the following raw materials in percentage by mass: 10-20 parts of ethanol, 10-20 parts of saturated polyester resin, 5-10 parts of isoamyl acetate, 1-5 parts of acetyl tributyl citrate, 5-10 parts of a neutralizing agent and 1-5 parts of an aromatic agent.
The depth of the engraved pattern on the printing roller is 15u-30 u.
The neutralizer comprises 1-2 parts of dimethylethanolamine and 2-4 parts of a zinc ricinoleate solution.
A paper packing box intaglio printing device comprises:
the paper feeding assembly is used for feeding paper to be printed and stacked into the printing assembly one by one;
the printing assemblies are sequentially connected through the clamping structure according to the printing sequence of the printing patterns, and the patterns decomposed by the paper entering the printing assemblies one by one are printed in a superposition mode one by one;
the first drying assembly is arranged at the rear ends of the printing assemblies, and the paper printed by the printing assemblies enters the first drying assembly to be dried for the first time;
the oil layer printing component is positioned at the rear end of the first drying component and is used for carrying out pattern surface comprehensive oil printing on the paper subjected to primary drying;
the second drying component is arranged at the rear side of the oil layer printing component and is used for drying the paper subjected to the oil printing for the second time;
and the line pressing assembly is positioned at the rear side of the mimeograph printing assembly and is used for pressing lines on the edge of the paper which is subjected to secondary drying.
The printing components and the oil printing components are the same ink printing component;
the printing ink printing component comprises a frame, wherein an ink groove is arranged below the frame, and is communicated with an ink adding hopper arranged on one side of the frame; an ink roller is arranged right above the ink groove, a paper pressing roller which is positioned on the same vertical plane with the central axis of the ink roller and is parallel to the central axis is arranged above the ink roller, the ink roller and the paper pressing roller respectively rotate towards each other when rotating, and the peripheral surface of the lower end of the ink roller is contacted with ink in the ink groove;
a scraper is arranged on the rack on one side of the ink roller, the scraper is in contact with the surface of the ink roller, and the scraper is positioned on one side of the ink roller after the ink roller is in rolling contact with ink;
the upper end of the paper pressing roller is provided with a double scraper which is contacted with the circumferential surface of the paper pressing roller, and the double scraper is fixedly connected with the top of the frame through a telescopic assembly;
the contact surface of the paper pressing roller and the ink roller in each printing assembly is positioned on the same horizontal plane;
the clamping structure is connected to the upper end and the lower end of the frame joint in the printing assemblies.
The clamping mechanism comprises a first fixed seat and a second fixed seat which are arranged at the top or the bottom of one side of the rack; the first fixing seat and the second fixing seat are symmetrically arranged, guide posts are respectively arranged on the opposite end faces of the first fixing seat and the second fixing seat, and one ends of the guide posts respectively arranged on the first fixing seat and the second fixing seat are respectively inserted into the first fixing seat and the second base to be fixedly connected with springs arranged in the first fixing seat and the second fixing seat; a rotating wheel is arranged at the other end of the guide pillar;
an air cylinder is arranged on the inner side of the first fixing seat, and a limiting pin is arranged at the bottom end of the air cylinder;
the top or the bottom of the other side of the rack is provided with a bolt extending towards one end of the rack connected with the rack, and the extending part of the bolt and the central lines of the first fixed seat and the second fixed seat are positioned on the same straight line; semicircular grooves are symmetrically formed in the bolt, and through holes penetrating through the upper end face and the lower end face of the bolt are formed in the bolt; and the through hole is close to the top end part of the bolt;
the end part of the bolt penetrates between the guide pillars with the rotating wheels on the first fixing seat and the second fixing seat, so that the rotating wheels are sunk into the bolt, and meanwhile, the air cylinder drives the limiting pin to be inserted into the through hole to fixedly connect the two connected racks.
The rotating shafts on the two sides of the ink roller and the paper pressing roller are connected through a gear assembly;
the gear assembly includes the first initiative pivot with driving motor fixed connection, with this first initiative pivot fixed connection's driving gear, with ink roller tip pivot fixed connection's first drive gear, with dancer roll tip pivot fixed connection's second drive gear, the driving gear meshes with first drive gear, the driving gear passes through driven gear meshing with second drive gear and is connected.
The wire pressing assembly comprises a first wire pressing roller, a second wire pressing roller is arranged at the top end of the first wire pressing roller, a wire pressing strip is arranged on the first wire pressing roller, and a wire pressing groove is formed in the second wire pressing roller.
The first drying component and the second drying component are the same drying component, the drying component comprises a drying box body, a first conveying belt is arranged at the bottom of the drying box body, and a plurality of ultraviolet drying lamps are arranged at the top of the drying box body;
a pallet is arranged at the rear end of the line pressing component, and a stop lever perpendicular to the pallet is arranged at one end of the pallet, which is far away from the line pressing component;
the paper feeding assembly, the printing assemblies, the first drying assembly, the oil layer printing assembly, the second drying assembly and the line pressing assembly are movably connected to the sliding rail;
the paper feeding assembly comprises a base, a second conveying belt is arranged at the top end of the base, and baffles are arranged on two sides of the second conveying belt.
The invention has the beneficial effects that:
(1) the image that will print more carries out the layering and handles, carries out the stack printing at the printing, carries out the 3D effect that the stack printing improves the image, and the color's of superimposed part emergence simultaneously fuses, makes edge part more fuzzy, soft, guarantees the pattern of printing through last oil reservoir printing simultaneously and can not take place the condition of losing colour, has guaranteed the image effect after whole printing.
(2) The production process has the advantages of simple process, easiness in operation, good printing effect of configured printing ink, more uniform color, no peculiar smell in the generation process, environmental friendliness, high automation degree of production equipment and high wire pressing machining precision, reduces the labor intensity of workers, and improves the production efficiency.
(3) The plurality of printing components are respectively used for printing different images, the plurality of printing components are matched with the limiting pin through the bolt when being connected, the plurality of printing components can be connected through the clamping mechanism to form a complete printing device, the split type design is convenient for the cleaning and the typesetting of the printing device, and meanwhile, the continuity of the printing process is guaranteed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a gravure printing device for a paper packing box according to the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is a schematic view of the assembly of the gear assembly of the present invention;
FIG. 4 is a schematic view of the meshing rotation of gears in the gear assembly of the present invention;
FIG. 5 is a schematic structural diagram of the wire pressing assembly of the present invention.
Detailed Description
For further explanation of the various embodiments, the drawings which form a part of the disclosure and which are incorporated in and constitute a part of this specification, illustrate embodiments and, together with the description, serve to explain the principles of operation of the embodiments, and to enable others of ordinary skill in the art to understand the various embodiments and advantages of the invention, and, by reference to these figures, reference is made to the accompanying drawings, which are not to scale and wherein like reference numerals generally refer to like elements.
Example 1
A paper packing box intaglio printing process comprises the following steps:
s1: decomposing the patterns to be printed according to the color levels, respectively engraving the decomposed patterns on the printing roller in a laser mirror image mode, and determining the depth of the engraved patterns on the printing roller according to the ink thickness of the printed patterns when the laser mirror image engraving is carried out so as to finish the engraving of the printing roller; when the pattern is decomposed, the pattern can be decomposed according to the hierarchy or color of the pattern, when the pattern is decomposed according to the color, the decomposition is carried out according to the similarity of the color, the decomposed image layer is subject to 3-6 layers, each decomposed image layer is subjected to engraving design, the designed engraving pattern is respectively engraved on a printing roller required to be printed through laser, the depth of the engraved pattern on the printing roller is 15-30 u, the specific depth can be determined in detail according to the shape of the pattern, if the engraving depth is too shallow, the adhesive force of the ink is reduced when the printing is carried out, the printed color is lighter, if the engraving depth is too deep, the ink is too much adsorbed on the printing roller, and the risk of too heavy color or ink overflow during the printing is caused;
s2: installing the engraved printing roller on the corresponding printing component 1 according to the printing order, and adjusting the distance between the printing roller and the paper pressing roller; specifically, the corresponding printing rollers are arranged on the corresponding printing components 1 according to the sequence of pattern layering, so that the printing is ensured to be performed according to the sequence, and meanwhile, the distance between the printing rollers and the platen roller is adjusted according to the standard of each pattern printing, so that the platen roller and the printing roller are better matched during printing, and the situation of ink overflow during printing of the pattern is avoided;
s3: preparing ink; mixing ink printed by different patterns, adding the ink mixed with different patterns into a corresponding printing machine, idling a printing roller in an ink tank of the ink, and dampening and stirring; when the ink is configured, the ink configuration of each pattern is configured according to the following proportion:
the printing ink comprises 10-20% of coloring printing ink and 80-90% of blending printing ink by mass; the coloring ink is prepared according to the color of each layer of pattern, and the prepared ink is prepared from the following raw materials in percentage by mass: 10-20 parts of ethanol, 10-20 parts of saturated polyester resin, 5-10 parts of isoamyl acetate, 1-5 parts of acetyl tributyl citrate, 5-10 parts of a neutralizing agent and 1-5 parts of an aromatic agent.
The neutralizer comprises 1-2 parts of dimethylethanolamine and 2-4 parts of a zinc ricinoleate solution.
The ethanol is used as a base, can be quickly volatilized after being printed, improves the drying of the printing ink, and can fully fuse other substances; after printing, the saturated polyester resin, the isoamyl acetate and the acetyl tributyl citrate can be crosslinked after drying, so that the integrity of the printing ink is ensured; the aromatic can provide fragrance for the printing ink, and the pollution of the odor generated during printing to the environment is avoided.
After the printing ink is added into the printing machine, the printing roller idles in the printing ink, so that the printing roller is completely soaked, the molecular gaps in the whole printing roller are ensured to be completely invaded by the printing ink, and the condition of ink leakage is ensured not to occur during printing;
s4: printing, namely putting paper to be printed into a paper feeding assembly 1, wherein the paper feeding assembly 1 feeds the paper into printing assemblies 3 which are sequentially connected for printing different patterns, and the printing time of each printing assembly 3 is 6-8 s; during printing, paper is sent into by a plurality of printing components 1 in proper order through paper feed component 1 one by one and is carried out the printing of layering, guarantees that the pattern after the printing can carry out perfect stack, and then ensures that the pattern that prints out can present the 3D effect, guarantees simultaneously that the image that prints out is softer, more emulation.
S5: drying for the first time, and curing and drying the printed paper by ultraviolet irradiation at the temperature of 40-60 ℃; the printed image paper enters a first drying process for drying, 1-3 ultraviolet lamp tubes with power of 100-300 watts and wavelength of 280-360nm are used for irradiation in the first drying process, the irradiation time is 3-5s, when the first drying process is carried out, saturated polyester resin, isoamyl acetate and tributyl acetylcitrate in the ink are prepared to be crosslinked in a heating state, coloring ink and other substances are driven to flow to a certain degree, the printed color is more bright, and the crosslinked ink is more firm in coloring and cannot fade;
s6: performing oil printing; feeding the paper subjected to primary drying into an mimeograph, and printing a comprehensive oil layer on the pattern surface of the paper subjected to primary drying;
s7: secondary drying, wherein the paper printed by the comprehensive oil layer is subjected to secondary curing and drying through ultraviolet irradiation, and the curing and drying temperature is 40-50 ℃;
the steps S6 and S7 print a layer of transparent oil layer on the printed paper pattern surface to ensure that the whole printed pattern is effectively protected, and the printed oil layer can ensure that the pattern on the packaging box can not fade due to time relation
S8: and the paper after secondary drying enters the line pressing assembly 4 to perform line pressing work on the edge of the paper, and the paper after the line is stacked is neat.
Example 2
A gravure printing apparatus for a paper packing box as shown in fig. 1, comprising:
the paper feeding assembly 1 feeds paper to be printed and stacked into the printing assembly 3 one by one; the paper feeding assembly 1 comprises a base 101, a second conveyor belt 102 is arranged at the top end of the base 101, baffles 103 are arranged on two sides of the second conveyor belt 102, paper placed on the base 101 is conveyed to the baffles 103 through the second conveyor belt, and the paper is fed into the printing assembly 3 one by one through the baffles 103; a paper inlet 5 is formed at the joint of the paper feeding component and the printing component 3, so that the paper feeding component can feed paper into the printing component 3 through the paper inlet 5;
the printing assemblies 3 are sequentially connected through the clamping structure 305 according to the printing sequence of the printing patterns, and the patterns decomposed by the paper entering the printing assemblies 3 one by one are printed in a superposition mode one by one; the number of the printing assemblies 3 is determined by the number of the pattern decomposition, if the decomposed image layer is 4, the number of the printing assemblies 3 is 4, the 4 printing assemblies are connected through the clamping structure 305, the mounting box of the whole equipment production line is convenient to detach, and when printing is carried out, paper passes through the 4 printing assemblies in sequence to complete the decomposition printing of the whole pattern;
the first drying assembly is arranged at the rear ends of the printing assemblies 3, and the paper printed by the printing assemblies 3 enters the first drying assembly to be dried for the first time; the temperature which can be provided by the first drying component 3 when the drying and curing are carried out is 40-60 ℃;
the oil layer printing component 10 is positioned at the rear end of the first drying component, and pattern surface comprehensive oil printing is carried out on the paper subjected to primary drying; the oil layer printing assembly can perform comprehensive oil printing on the printed pattern paper, so that the color of the pattern on the printed paper is prevented from fading;
the second drying component is arranged at the rear side of the oil layer printing component 10 and is used for drying the paper subjected to the oil printing for the second time; the second drying component is used for carrying out secondary drying and curing on the paper subjected to the mimeographing, so that the mimeographing and the paper are integrated;
and the line pressing assembly 4 is positioned at the rear side of the mimeographing assembly 10 and used for pressing lines on the edge of the paper subjected to secondary drying. This line ball subassembly carries out the line ball to the paper after the printing and handles, guarantees to carry out the edge cutting at later stage paper.
This whole strip lithography apparatus can carry out layering stack printing to the pattern after the decomposition, guarantees that the pattern 3D effect after the printing is more clear and definite, and pattern stack portion is softer simultaneously, avoids carrying out the clear and definite condition of becoming hard of same printing boundary line, and the pattern fidelity that prints out simultaneously is better.
Example 3
On the basis of example 2, a plurality of printing units 3 and the oil printing unit 10 are the same ink printing unit;
the ink printing component comprises a frame 301, an ink groove 306 is arranged below the frame 301, and the ink groove 306 is communicated with an ink adding hopper 304 arranged on one side of the frame 301; an ink roller 307 is arranged right above the ink groove 306, a paper pressing roller 308 which is positioned on the same vertical plane with the central axis of the ink roller 307 and is parallel to the central axis is arranged above the ink roller 307, the ink roller 307 and the paper pressing roller 308 respectively rotate towards each other when rotating, and the peripheral surface of the lower end of the ink roller 307 is in contact with ink in the ink groove 306; the prepared ink is added into an ink tank through an ink adding hopper, the ink roller 307 is positioned right above the ink tank and is in contact with the ink in the ink tank, the ink roller can enter a pattern engraving plate in the ink roller in the rotating process, the distance between the paper pressing roller 308 and the ink roller can be adjusted according to the thickness of paper, meanwhile, the paper pressing roller and the ink roller rotate oppositely when rotating, the paper entering the space between the ink roller and the paper pressing roller can move backwards through the rotation of the paper pressing roller and the ink roller, the printing is carried out through the ink roller, a control panel 302 is arranged on one side of the rack 301, and a plurality of adjusting keys 303 are arranged below the control panel 302;
a scraper 309 is arranged on the frame 301 on one side of the ink roller 307, the scraper 309 is in contact with the surface of the ink roller 307, and the scraper 309 is positioned on one side of the ink roller 307 which is in rolling contact with ink; the scraper 309 scrapes off ink on the ink roller after the ink is invaded, so that excessive ink is prevented from being printed on paper and causing pollution;
the upper end of the paper pressing roller 308 is provided with a double scraper 310 which is contacted with the circumferential surface of the paper pressing roller 308, and the double scraper 310 is fixedly connected with the top of the frame 310 through a telescopic component; the double scraper 310 is fastened on the upper part of the platen roller and used for controlling the rotation rate of the platen roller and removing pollutants on the platen roller.
The surfaces of the platen roller 308 and the ink roller 307 in each printing unit 3 are in contact with each other and are located on the same horizontal plane;
the clamping structure 305 is connected to the upper and lower ends of the connection of the frames 1 in the plurality of printing modules 3.
Specifically before printing, the printing element with the demand passes through the same connection of joint structure to on guaranteeing the same horizontal plane of printing element displacement, the paper that will print enters into printing element 3, moves to next equipment under the effect of ink roller and dancer roll, in the motion, on the printing ink in the ink roller adhesion china ink groove printed the paper, the printing of accomplishing the layer-by-layer printing of image, the printing of whole pattern is accomplished after all printing elements to the paper.
Example 4
On the basis of embodiment 3, as shown in fig. 2, in order to ensure that the two printing component solutions are disassembled from the mounting box and improve the efficiency of the layered printing, the clamping mechanism 305 includes a first fixing seat 312 and a second fixing seat 313 which are arranged at the top or the bottom of one side of the frame 301; the first fixing seat 312 and the second fixing seat 313 are symmetrically arranged, guide posts 315 are respectively arranged on the opposite end surfaces of the first fixing seat 312 and the second fixing seat 313, and one ends of the guide posts 315 respectively arranged on the first fixing seat 312 and the second fixing seat 313 are respectively inserted into the first fixing seat 312 and the second fixing seat 313 and are fixedly connected with springs 314 arranged in the first fixing seat 312 and the second fixing seat 313; a rotating wheel 316 is arranged at the other end of the guide post 315; the upper end and the lower end of one side of the rack 301 are respectively provided with a first fixed seat 312 and a second fixed seat 313 which are stacked mutually, a guide pillar 315 arranged between the first fixed seat 312 and the second fixed seat 313 can be pressed up and down through a spring, so that the bolt can be ensured to smoothly enter a gap formed by a rotating wheel on the guide pillar, and the rotating wheel can be used for reducing friction force to effectively protect the bolt when the bolt enters the gap;
an air cylinder 317 is arranged on the inner side of the first fixed seat 312, and a limit pin 318 is arranged at the bottom end of the air cylinder 317;
the top or the bottom of the other side of the rack 301 is provided with a bolt 319 which extends towards one end of the rack 301 connected with the rack, and the extension part of the bolt 319 and the center lines of the first fixed seat 312 and the second fixed seat 313 are positioned on the same straight line; semicircular grooves 320 are symmetrically formed in the bolt 319, and a through hole 321 which penetrates through the upper end face and the lower end face of the bolt 319 is formed in the bolt 319; and the through hole 321 is near the top end of the plug 319;
the end of the bolt 319 passes through the space between the guide posts 315 with the rotating wheel 316 on the first fixing seat 312 and the second fixing seat 313, so that the rotating wheel 316 is sunk into the bolt 319, and simultaneously the cylinder 317 drives the limit pin 318 to be inserted into the through hole 312 to fixedly connect the two connected racks 301.
Particularly, when the connection is performed, the plug 319 enters a gap between the guide posts on the upper and lower fixing seats, at this time, since the top of the pin 319 is pointed, the rotating wheel is compressed upward and downward to fix the base end when entering the gap, when the bolt is completely inserted into the gap and the semicircular groove 320 of the bolt 319 is located at the position of the rotating wheel, the rotating wheel is inserted into the semicircular groove 320, the bolt 319 is fixedly connected with the first fixing seat and the second fixing seat, meanwhile, the air cylinder 317 drives the limit pin 318 to move downwards, the limit pin is inserted into the through hole to complete the connection between the whole machine frames, when needs are dismantled, the cylinder drives spacer pin 318 upward movement, and the spacer pin breaks away from the through-hole, stimulates one of them frame this moment, and the runner climbs out half circular groove, accomplishes the separation, couples together the frame through this clamping mechanism 305, makes things convenient for the connection and the dismantlement of frame.
Example 5
On the basis of embodiment 3, in order to ensure that the ink roller and the paper pressing roller can synchronously rotate, rotating shafts on two sides of the ink roller 307 and the paper pressing roller 308 as shown in fig. 3 and 4 are connected through a gear assembly 323;
the gear assembly 323 comprises a first driving rotating shaft 327 fixedly connected with a driving motor, a driving gear 328 fixedly connected with the first driving rotating shaft 327, a first driving gear 330 fixedly connected with a rotating shaft at the end part of the ink roller 307, and a second driving gear 331 fixedly connected with a rotating shaft at the end part of the paper pressing roller 308, wherein the driving gear 328 is meshed with the first driving gear 330, and the driving gear 328 is meshed with the second driving gear 331 through a driven gear 329.
Confirm the motor and drive first initiative pivot 327 and carry out anticlockwise rotation specifically as shown in fig. 4, first initiative pivot drives the driving gear and carries out anticlockwise rotation, this anticlockwise initiative red wheel drives driven gear 329 and first drive gear 330 respectively and carries out clockwise rotation, first drive gear drive the ink roller and carry out clockwise rotation, clockwise rotation's driven gear drives second drive gear 331 and carries out anticlockwise rotation, second drive gear 331 carries out anticlockwise rotation with driving the dancer roll, anticlockwise rotation's dancer roll and clockwise rotation's ink roller can carry out relative rotation, realize dancer roll and ink roller synchronous rotation to realize paper feed and printing.
Example 6
On the basis of embodiment 1, as shown in fig. 5, the line pressing assembly 4 includes a first line pressing roller 401, a second line pressing roller 402 is disposed at a top end of the first line pressing roller 401, a line pressing strip 403 is disposed on the first line pressing roller 401, and a line pressing groove 404 is disposed on the second line pressing roller 402. The first wire pressing roller and the wire pressing roller press the edges of the paper;
the first drying component and the second drying component are the same drying component, the drying component comprises a drying box body 11, a first conveying belt 1 is arranged at the bottom of the drying box body 11, and a plurality of ultraviolet drying lamps 7 are arranged at the top of the drying box body 11; determining the number and power of the ultraviolet drying lamps 7 according to the drying and curing temperatures of the first drying component and the second drying component;
a pallet 8 is arranged at the rear end of the line pressing component 4, and a stop lever 9 perpendicular to the pallet 8 is arranged at one end, far away from the line pressing component 4, of the pallet 8; the pallet and the stop lever can be used for stacking printed paper.
The paper feeding assembly 1, the printing assemblies 3, the first drying assembly, the oil layer printing assembly 10, the second drying assembly and the line pressing assembly 4 are movably connected onto the sliding rail 2. With all subassembly swing joint on slide rail 2, make things convenient for the installation and the dismantlement of whole production line.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "disposed," "connected," "secured," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The gravure printing process for the paper packaging box is characterized by comprising the following steps of:
s1: decomposing the patterns to be printed according to the color levels, engraving the decomposed patterns on the printing roller through laser mirror images respectively, and determining the depth of the engraved patterns on the printing roller according to the ink thickness of the printed patterns when the laser mirror images are engraved so as to finish the engraving of the printing roller;
s2: installing the printing roller after the plate engraving on the corresponding printing component (1) according to the printing sequence, and adjusting the distance between the printing roller and the paper pressing roller;
s3: preparing ink; mixing ink printed by different patterns, adding the ink mixed with different patterns into a corresponding printing machine, idling a printing roller in an ink tank of the ink, and dampening and stirring;
s4: printing, namely putting paper to be printed into a paper feeding assembly (1), wherein the paper feeding assembly (1) feeds the paper into printing assemblies (3) which are sequentially connected for printing different patterns, and the printing time of each printing assembly (3) is 6-8 s;
s5: drying for the first time, and curing and drying the printed paper by ultraviolet irradiation at the temperature of 40-60 ℃;
s6: performing oil printing; feeding the paper subjected to primary drying into an mimeograph, and printing a comprehensive oil layer on the pattern surface of the paper subjected to primary drying;
s7: secondary drying, wherein the paper printed by the comprehensive oil layer is subjected to secondary curing and drying through ultraviolet irradiation, and the curing and drying temperature is 40-50 ℃;
s8: and the paper after secondary drying enters the line pressing assembly (4) to perform line pressing work on the edge of the paper, and the paper after the line is stacked is neat.
2. The intaglio printing process for paper packaging boxes according to claim 1, wherein the ink prepared in step S2 comprises 10-20% of colored ink and 80-90% of formulated ink by mass;
the blended ink is prepared from the following raw materials in percentage by mass: 10-20 parts of ethanol, 10-20 parts of saturated polyester resin, 5-10 parts of isoamyl acetate, 1-5 parts of acetyl tributyl citrate, 5-10 parts of a neutralizing agent and 1-5 parts of an aromatic agent.
3. The gravure printing process of a paper packing box as claimed in claim 1, wherein the depth of the engraved pattern on the printing roll is 15u-30 u.
4. The gravure printing process of a paper packing box according to claim 2, wherein the neutralizing agent comprises 1-2 parts of dimethylethanolamine and 2-4 parts of zinc ricinoleate solution.
5. The utility model provides a paper packing carton intaglio printing equipment which characterized in that includes:
the paper feeding assembly (1) feeds paper to be printed and stacked into the printing assembly (3) one by one;
the printing assemblies (3) are sequentially connected through the clamping structure (305) according to the printing sequence of the printing patterns, and the patterns decomposed by the paper entering the printing assemblies (3) one by one are printed in a superposition mode one by one;
the first drying assembly is arranged at the rear ends of the printing assemblies (3), and the paper printed by the printing assemblies (3) enters the first drying assembly to be dried for the first time;
the oil layer printing component (10), the oil layer printing component (10) is positioned at the rear end of the first drying component, and is used for carrying out overall oil printing on the pattern surface of the paper subjected to primary drying;
the second drying component is arranged at the rear side of the oil layer printing component (10) and used for drying the paper subjected to the oil printing for the second time;
and the line pressing assembly (4) is positioned at the rear side of the mimeograph printing assembly (10) and is used for pressing lines on the edge of the paper which is dried for the second time.
6. Intaglio printing device for paper packaging boxes according to claim 5, characterized in that several of said printing units (3) and said oil-printing unit (10) are the same type of ink printing unit;
the ink printing assembly comprises a rack (301), wherein an ink groove (306) is arranged below the rack (301), and the ink groove (306) is communicated with an ink adding hopper (304) arranged on one side of the rack (301); an ink roller (307) is arranged right above the ink groove (306), a paper pressing roller (308) which is positioned on the same vertical plane with the central axis of the ink roller (307) and is parallel to the central axis is arranged above the ink roller (307), the ink roller (307) and the paper pressing roller (308) respectively rotate towards each other when rotating, and the peripheral surface of the lower end of the ink roller (307) is in contact with ink in the ink groove (306);
a scraper (309) is arranged on the rack (301) on one side of the ink roller (307), the scraper (309) is in contact with the surface of the ink roller (307), and the scraper (309) is positioned on one side of the ink roller (307) which is in rolling contact with ink;
the upper end of the paper pressing roller (308) is provided with a double scraper (310) which is contacted with the circumferential surface of the paper pressing roller (308), and the double scraper (310) is fixedly connected with the top of the rack (310) through a telescopic assembly;
the surfaces of the platen roller (308) and the ink roller (307) in each printing assembly (3) are in contact with each other and are positioned on the same horizontal plane;
the clamping structure (305) is connected to the upper end and the lower end of the joint of the machine frame (1) in the printing assemblies (3).
7. The intaglio printing device for paper packaging boxes according to claim 6, characterized in that said snapping mechanism (305) comprises a first fixed seat (312) and a second fixed seat (313) provided on the top or bottom of one side of the frame (301); the first fixing seat (312) and the second fixing seat (313) are symmetrically arranged, guide posts (315) are respectively arranged on the opposite end surfaces of the first fixing seat (312) and the second fixing seat (313), and one ends of the guide posts (315) respectively arranged on the first fixing seat (312) and the second fixing seat (313) are respectively inserted into the first fixing seat (312) and the second base (313) to be fixedly connected with springs (314) arranged in the first fixing seat (312) and the second fixing seat (313); a rotating wheel (316) is arranged at the other end of the guide post (315);
an air cylinder (317) is arranged on the inner side of the first fixed seat (312), and a limit pin (318) is arranged at the bottom end of the air cylinder (317);
the top or the bottom of the other side of the rack (301) is provided with a bolt (319) extending to one end of the rack (301) connected with the bolt, and the extending part of the bolt (319) and the center lines of the first fixed seat (312) and the second fixed seat (313) are positioned on the same straight line; semicircular grooves (320) are symmetrically formed in the bolt (319), and a through hole (321) penetrating through the upper end face and the lower end face of the bolt (319) is formed in the bolt (319); and the through hole (321) is close to the top end part of the plug pin (319);
the end part of the bolt (319) passes through the position between the guide posts (315) with the rotating wheels (316) on the first fixing seat (312) and the second fixing seat (313), so that the rotating wheels (316) are sunk into the bolt (319), and meanwhile, the air cylinder (317) drives the limiting pin (318) to be inserted into the through hole (312) to fixedly connect the two connected racks (301).
8. The intaglio printing apparatus for paper packing box according to claim 6 characterized in that the rotation shafts of both sides of the ink roller (307) and the paper pressing roller (308) are connected by a gear assembly (323);
the gear assembly (323) includes first initiative pivot (327) with driving motor fixed connection, driving gear (328) with this first initiative pivot (327) fixed connection, first drive gear (330) with ink roller (307) tip pivot fixed connection, with second drive gear (331) of dancer roll (308) tip pivot fixed connection, driving gear (328) and first drive gear (330) meshing, driving gear (328) and second drive gear (331) are connected through driven gear (329) meshing.
9. The intaglio printing equipment for paper packaging boxes according to claim 5, wherein the line pressing assembly (4) comprises a first line pressing roller (401), a second line pressing roller (402) is arranged at the top end of the first line pressing roller (401), a line pressing strip (403) is arranged on the first line pressing roller (401), and a line pressing groove (404) is formed on the second line pressing roller (402).
10. The gravure printing equipment for the paper packaging box according to claim 5, wherein the first drying component and the second drying component are the same drying component, the drying component comprises a drying box body (11), a first conveying belt (1) is arranged at the bottom of the drying box body (11), and a plurality of ultraviolet drying lamps (7) are arranged at the top of the drying box body (11);
a pallet (8) is arranged at the rear end of the line pressing component (4), and a stop lever (9) perpendicular to the pallet (8) is arranged at one end, away from the line pressing component (4), of the pallet (8);
the paper feeding assembly (1), the printing assemblies (3), the first drying assembly, the oil layer printing assembly (10), the second drying assembly and the line pressing assembly (4) are movably connected to the sliding rail (2);
the paper feeding assembly (1) comprises a base (101), a second conveying belt (102) is arranged at the top end of the base (101), and baffles (103) are arranged on two sides of the second conveying belt (102).
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| CN202010351386.6A CN111347758B (en) | 2020-04-28 | 2020-04-28 | Gravure printing process and equipment for paper packaging box |
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| CN202010351386.6A CN111347758B (en) | 2020-04-28 | 2020-04-28 | Gravure printing process and equipment for paper packaging box |
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| CN112937105A (en) * | 2021-01-29 | 2021-06-11 | 佛山市顺德区普瑞特机械制造有限公司 | Coating production process of edge banding, single-roll printing machine and infrared leveling machine |
| CN113619302A (en) * | 2021-08-04 | 2021-11-09 | 江苏美嘉包装有限公司 | Anti-counterfeiting printing process for packaging box |
| CN114312080A (en) * | 2021-11-15 | 2022-04-12 | 东莞市美盈森环保科技有限公司 | Preparation process and application method of fragrant ink printed matter |
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| CN111347758B (en) | 2022-03-08 |
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