CN110744943A - Process method for positioning and compounding laser positioning transfer film and base paper - Google Patents
Process method for positioning and compounding laser positioning transfer film and base paper Download PDFInfo
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- CN110744943A CN110744943A CN201910843180.2A CN201910843180A CN110744943A CN 110744943 A CN110744943 A CN 110744943A CN 201910843180 A CN201910843180 A CN 201910843180A CN 110744943 A CN110744943 A CN 110744943A
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- transfer film
- laser positioning
- paper
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/025—Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet
- B41M5/06—Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet using master sheets coated with jelly-like materials, e.g. gelatin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F16/00—Transfer printing apparatus
- B41F16/0006—Transfer printing apparatus for printing from an inked or preprinted foil or band
- B41F16/002—Presses of the rotary type
- B41F16/0033—Presses of the rotary type with means for applying print under pressure only, e.g. using pressure sensitive adhesive
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F16/00—Transfer printing apparatus
- B41F16/0006—Transfer printing apparatus for printing from an inked or preprinted foil or band
- B41F16/0093—Attachments or auxiliary devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F33/00—Indicating, counting, warning, control or safety devices
-
- 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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Printing Methods (AREA)
Abstract
The invention discloses a process method for positioning and compounding a laser positioning transfer film and base paper, which is implemented according to the following steps: step 1: pretreatment of a laser positioning transfer film: putting the drum laser positioning transfer film into an unwinding device a; the drawing device a draws the laser positioning transfer film to a drawing roller, and then the laser positioning transfer film enters a coating device to be coated with an adhesive; step 2: pretreatment of base paper: putting the raw paper of the winding drum into an unwinding device b; the base paper is drawn by a drawing device b to be sequentially subjected to back coating, back coating drying, back coating cooling, base paper printing and floating roll; and step 3: compounding by an image registration system; and 4, step 4: and (3) post-treatment: and after the registration, performing composite drying, composite cooling, stripping, base film rolling and paper rolling in sequence. The invention improves the efficiency and saves the cost.
Description
Technical Field
The invention belongs to the technical field of cigarette pack packaging, and particularly relates to a process method for positioning and compounding a laser positioning transfer film and base paper.
Background
The holographic laser positioning pattern of the cigarette label has two common processes: one adopts aluminized paper and location to scald, print on the aluminized paper first, then position and scald, said method has a gold stamping process more, need to use location electrochemical aluminium membrane and gold stamping apparatus, waste labour and material; one is that the laser positioning transfer paper can directly transfer the positioning holographic pattern to the base paper through the laser positioning transfer film in a compounding way, and then secondary overprinting is carried out on the laser positioning transfer paper, but in the method, the equidistance error of the mould pressing mark repetition length of the laser positioning transfer film is too large, generally 0.3 mm-0.5 mm, and the error waveform is unstable, so the consistency of the transferred page length on the paper is poor, and the mould pressing mark is difficult to identify in a printing registration system, so that the method can only be used for single-paper offset printing, and the qualification rate is very low when the method is used for gravure positioning roll paper printing.
Disclosure of Invention
The invention aims to provide a process method for positioning and compounding a laser positioning transfer film and base paper, which can improve the efficiency and save the cost.
The technical scheme adopted by the invention is that a process method for positioning and compounding a laser positioning transfer film and base paper is implemented according to the following steps:
step 1: pretreatment of laser positioning transfer film
Putting the drum laser positioning transfer film into an unwinding device a; the drawing device a draws the laser positioning transfer film to a drawing roller, and then the laser positioning transfer film enters a coating device to be coated with an adhesive;
step 2: base paper pretreatment
Putting the raw paper of the winding drum into an unwinding device b; the base paper is drawn by a drawing device b to be sequentially subjected to back coating, back coating drying, back coating cooling, base paper printing and floating roll;
and step 3: image registration system compositing
The photoelectric eye or the industrial camera collects the data of the die pressing mark on the laser transfer film and the fixed length overprinting mark printed on the base paper, and feeds the data back to the industrial personal computer for analyzing the data to obtain the registration data; the controller adjusts the floating roller to lift according to the registration data, so that the composite feeding length of the paper is changed, and the coarse registration is realized; the controller adjusts the phase of the stretching roller according to the registration data, and the laser positioning transfer film is stretched in a fixed length mode to achieve accurate registration; the encoder feeds real-time operation parameters of the servo motor a and the servo motor b back to an encoder interface board for detection, and controls the servo motor a and the servo motor b to compensate errors according to detection data, so that accurate color register is realized;
and 4, step 4: post-treatment
And after the registration, performing composite drying, composite cooling, stripping, base film rolling and paper rolling in sequence.
The invention is also characterized in that:
and 2, printing base paper, namely printing a fixed-length overprint label on the base paper.
In step 3, accurate registration is to say that the mould pressing marks on the laser positioning transfer film and the overprinting marks on the base paper are transversely centered to carry out rapid and accurate registration, and the registration error is +/-0.1 mm.
In step 3, the photoelectric eye or the industrial camera is arranged after compounding and before compounding and drying.
In step 3, the image registration system comprises an industrial vision light source, an industrial camera or photoelectric eye, an industrial personal computer and a controller which are electrically connected in sequence; the controller is respectively connected with the servo motor a and the servo motor b; the tail part of the servo motor a is provided with an encoder a; the tail part of the servo motor b is provided with an encoder b; the encoder a and the encoder b are both electrically connected with an encoder interface board; the industrial personal computer is electrically connected with the encoder interface board through the PCI bus; an output shaft of the servo motor a is fixedly connected with the floating roller; an output shaft of the servo motor b is fixedly connected with the stretching roller; the industrial computer is also electrically connected with a display.
The controller is a PLC.
Employed in industrial cameras or photo-eyes are image sensors.
Step 3, the specific working process of the image registration system is as follows:
when the mark passes through the camera, the camera captures a mark image and transmits the image to the controller, the controller identifies the distance of the four lines of the mark, the longitudinal error is calculated according to the distance of the upper line and the lower line of the mark, and the transverse error is calculated according to the distance of the left line and the right line; the controller controls each servo motor to operate according to the errors, the encoder a and the encoder b feed real-time operation parameters of the servo motors a and b back to the encoder interface main board for detection, and the servo motors a and b are controlled to compensate the errors according to detection data to achieve accurate color register.
In the step 4, peeling is carried out, namely, peeling is carried out on the base film of the laser positioning transfer film; rolling the base film after peeling, and recycling; and rolling the peeled paper so as to finish the manufacture of the drum laser positioning transfer paper.
The invention has the beneficial effects that:
(1) because a wet compounding process is adopted, the base paper needs to be subjected to back coating treatment before compounding, so that the paper characteristics are improved, and waste products caused by upwarp and downgroveling of the transfer paper after compounding and drying are prevented; because the paper is more stable than the laser positioning transfer film, the page length of the paper is basically consistent under the condition of constant tension, a fixed-length overprinting mark (reference) is printed on the base paper before compounding, after compounding, a compounding registration system firstly identifies the registration data of a mould pressing mark on the film and the overprinting mark on the paper, then the floating roller is regulated to lift through a controller, the feeding compounding length of the paper is changed to realize coarse registration, then the phase of a stretching roller is regulated through the controller, the fixed-length stretching laser positioning transfer film realizes accurate registration, finally the mould pressing mark on the film and the overprinting mark on the paper are quickly and accurately registered, the longitudinal positioning precision is +/-0.1 mm, the transverse centering registration is carried out to reduce the absolute value of the maximum error, and the error waveform is stable; a printing registration system in gravure positioning printing identifies the fixed-length overprinting standard registration printed on the base paper; finally, the problem of low pass rate of gravure positioning printing of drum laser positioning transfer paper is solved;
(2) the composite registration method comprises the steps that a photoelectric eye or a camera collects a die pressing mark on a laser positioning transfer film and a fixed-length overprinting mark printed on base paper, a composite registration system calculates registration errors by taking the fixed-length overprinting mark printed on the base paper as a reference through comparative analysis of collected data to obtain registration data, and then a controller adjusts the phase of a laser transfer film feeding stretching roller and the lifting of a paper feeding composite floating roller to realize the registration of the film and the paper; the laser transfer film is easy to stretch, and the storage length of the floating roller is greater than or equal to the circumference of the printing plate, so that the process method can realize quick and accurate registration; the overprint marks printed on the base paper are black marks which can be identified by any printing registration system;
(3) the up-to-standard drum laser positioning transfer paper can improve the efficiency of positioning printed products by a web gravure printing machine and stabilize the product quality; the standard drum laser positioning transfer paper can reduce one gold stamping process of a positioning printing product produced by a web gravure printing machine, and save electrochemical aluminum, manpower and equipment investment.
Drawings
FIG. 1 is a flow chart of the process of positioning and compounding the laser positioning transfer film and base paper of the invention;
FIG. 2 is a schematic diagram of the operation of an image registration system in the process of positioning and compounding the laser positioning transfer film and the base paper;
FIG. 3 is a schematic structural diagram of an image registration system in the process of positioning and compounding the laser positioning transfer film and base paper according to the invention;
FIG. 4 is a schematic diagram of the working principle of an image registration system in the process of positioning and compounding the laser positioning transfer film and the base paper.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
As shown in figure 1, the process method for positioning and compounding the laser positioning transfer film and the base paper is implemented according to the following steps:
step 1: pretreatment of laser positioning transfer film
Putting the drum laser positioning transfer film into an unwinding device a; and the traction device a is used for drawing the laser positioning transfer film to a stretching roller, and then the laser positioning transfer film enters the coating device to be coated with the adhesive.
Step 2: base paper pretreatment
Putting the raw paper of the winding drum into an unwinding device b; the base paper is drawn by a drawing device b to be sequentially subjected to back coating, back coating drying, back coating cooling, base paper printing and floating roll;
wherein, the base paper printing is to print the fixed-length overprint label on the base paper.
And step 3: image registration system compositing
The photoelectric eye or the industrial camera collects the data of the die pressing mark on the laser transfer film and the fixed length overprinting mark printed on the base paper, and feeds the data back to the industrial personal computer for analyzing the data to obtain the registration data; the controller adjusts the floating roller to lift according to the registration data, so that the composite feeding length of the paper is changed, and the coarse registration is realized; the controller adjusts the phase of the stretching roller according to the registration data, and the laser positioning transfer film is stretched in a fixed length mode to achieve accurate registration; the encoder feeds real-time operation parameters of the servo motor a and the servo motor b back to an encoder interface board for detection, and controls the servo motor a and the servo motor b to compensate errors according to detection data, so that accurate color register is realized;
wherein, the accurate registration is that the mould pressing mark on the laser positioning transfer film and the overprinting mark on the base paper are transversely centered for rapid and accurate registration, and the registration error is +/-0.1 mm;
as shown in fig. 3, the image registration system includes an industrial vision light source, an industrial camera or photoelectric eye, an industrial personal computer, and a controller, which are electrically connected in sequence; the controller is respectively connected with the servo motor a and the servo motor b; the tail part of the servo motor a is provided with an encoder a; the tail part of the servo motor b is provided with an encoder b; the encoder a and the encoder b are both electrically connected with an encoder interface board; the industrial personal computer is electrically connected with the encoder interface board through the PCI bus; an output shaft of the servo motor a is fixedly connected with the floating roller; an output shaft of the servo motor b is fixedly connected with the stretching roller; the industrial personal computer is also electrically connected with a display; wherein, the photoelectric eye or the industrial camera is arranged after the compounding and before the compounding and drying; the controller is a PLC; employed in industrial cameras or photo-eyes are image sensors;
as shown in fig. 4, the specific working process of the image registration system is as follows:
when the mark passes through the camera, the camera captures a mark image and transmits the image to the controller, the controller identifies the distance of the four lines of the mark, the longitudinal error is calculated according to the distance of the upper line and the lower line of the mark, and the transverse error is calculated according to the distance of the left line and the right line; the controller controls each servo motor to operate according to the error, the encoder a and the encoder b feed real-time operation parameters of the servo motors a and b back to the encoder interface main board for detection, and the servo motors a and b are controlled to compensate the error according to detection data to realize accurate color register;
one image has million pixels, carries a large amount of information, and easily distinguishes interference signals and marking signals; the method can also effectively detect weak color signals and colorless signals; the gloss oil imaging effect recognizable by the image registration system is shown in fig. 4;
because the marks are obtained in the same image at the same time, the change of the printing speed has no influence on the error detection;
in the marking specification diagram, the green part refers to a reference color code, the red part is the color code of the current color group, and the mark is very small and can be flexibly inserted into a blank area without occupying a paper edge; the image registration system may also be compatible with detection of the trapezoid objects.
And 4, step 4: post-treatment
After the registration, carrying out composite drying, composite cooling, stripping, base film rolling and paper rolling in sequence;
peeling a base film of the laser positioning transfer film; rolling the base film after peeling, and recycling; and rolling the peeled paper so as to finish the manufacture of the drum laser positioning transfer paper.
The laser positioning transfer film and base paper positioning composite process method has the advantages that:
(1) because the paper is more stable than the film, the page lengths of the paper are basically consistent under the condition of constant tension; before compounding, printing marks on the edges of the paper, wherein the marks on the film are in register with the marks on the paper during compounding, and a printer tracks the marks on the paper during printing; the method comprises the following steps of collecting marks on a film and a paper by a camera, wherein the longitudinal positioning precision of positioning paper can reach +/-0.1 mm, the page length is the length of a printing plate, and the marks are black marks which can be identified by any registration system; the centering alignment can be realized in the transverse direction so as to reduce the absolute value of the maximum error; a gold stamping process is omitted, so that the investment of alumite, manpower and equipment is saved; calculated according to the yield of 20 ten thousand boxes, the material is saved by at least 1600 ten thousand yuan; less input of 4000 million of rotary gold stamping equipment;
(2) by the method, the positioning holographic patterns on the laser positioning transfer film are positioned and transferred to the base paper, the positioning holographic pattern registration marks are changed into fixed-length registration marks printed on the base paper from mould pressing marks, the registration error is +/-0.1 mm, the error waveform is stable, the registration marks printed on the base paper are easy to identify by a printing registration system, and the problem of low qualified rate of gravure positioning printing of the web is finally solved.
Claims (9)
1. A laser positioning transfer film and base paper positioning compounding process method is characterized by comprising the following steps:
step 1: pretreatment of laser positioning transfer film
Putting the drum laser positioning transfer film into an unwinding device a; the drawing device a draws the laser positioning transfer film to a drawing roller, and then the laser positioning transfer film enters a coating device to be coated with an adhesive;
step 2: base paper pretreatment
Putting the raw paper of the winding drum into an unwinding device b; the base paper is drawn by a drawing device b to be sequentially subjected to back coating, back coating drying, back coating cooling, base paper printing and floating roll;
and step 3: image registration system compositing
The photoelectric eye or the industrial camera collects the data of the die pressing mark on the laser transfer film and the fixed length overprinting mark printed on the base paper, and feeds the data back to the industrial personal computer for analyzing the data to obtain the registration data; the controller adjusts the floating roller to lift according to the registration data, so that the composite feeding length of the paper is changed, and the coarse registration is realized; the controller adjusts the phase of the stretching roller according to the registration data, and the laser positioning transfer film is stretched in a fixed length mode to achieve accurate registration; the encoder feeds real-time operation parameters of the servo motor a and the servo motor b back to an encoder interface board for detection, and controls the servo motor a and the servo motor b to compensate errors according to detection data, so that accurate color register is realized;
and 4, step 4: post-treatment
And after the registration, performing composite drying, composite cooling, stripping, base film rolling and paper rolling in sequence.
2. The composite process of claim 1, wherein in step 2, the base paper is printed with a fixed length overprint.
3. The composite process of claim 1, wherein in step 3, the laser positioning transfer film is precisely aligned with the transfer mark on the base paper, and the laser positioning transfer film is centered transversely to perform rapid and precise alignment, with an alignment error of ± 0.1 mm.
4. The combined process of claim 1, wherein in step 3, the photoelectric eye or the industrial camera is disposed after the combination and before the combination is dried.
5. The composite process method according to claim 1, wherein in the step 3, the image registration system comprises an industrial vision light source, an industrial camera or photoelectric eye, an industrial personal computer and a controller which are electrically connected in sequence; the controller is respectively connected with the servo motor a and the servo motor b; the tail part of the servo motor a is provided with an encoder a; the tail part of the servo motor b is provided with an encoder b; the encoder a and the encoder b are both electrically connected with an encoder interface board; the industrial personal computer is electrically connected with the encoder interface board through the PCI bus; an output shaft of the servo motor a is fixedly connected with the floating roller; an output shaft of the servo motor b is fixedly connected with the stretching roller; the industrial computer is also electrically connected with a display.
6. The composite process of claim 4, wherein the controller is a PLC.
7. The composite process of claim 4, wherein an image sensor is employed in the industrial camera or photoeye.
8. The composite process of claim 1, wherein in step 3, the specific operation of the image registration system is as follows:
when the mark passes through the camera, the camera captures a mark image and transmits the image to the controller, the controller identifies the distance of the four lines of the mark, the longitudinal error is calculated according to the distance of the upper line and the lower line of the mark, and the transverse error is calculated according to the distance of the left line and the right line; the controller controls each servo motor to operate according to the errors, the encoder a and the encoder b feed real-time operation parameters of the servo motors a and b back to the encoder interface main board for detection, and the servo motors a and b are controlled to compensate the errors according to detection data to achieve accurate color register.
9. The composite process method of any one of claims 1 to 8, wherein in the step 4, peeling is performed on a base film of the laser positioning transfer film; rolling the base film after peeling, and recycling; and rolling the peeled paper so as to finish the manufacture of the drum laser positioning transfer paper.
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| CN201910843180.2A CN110744943A (en) | 2019-09-06 | 2019-09-06 | Process method for positioning and compounding laser positioning transfer film and base paper |
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Cited By (3)
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| CN111516381A (en) * | 2020-05-09 | 2020-08-11 | 江苏兴广包装科技有限公司 | Coating and die pressing integrated equipment set |
| CN112893026A (en) * | 2021-01-25 | 2021-06-04 | 佛山鹏程易胜机械有限公司 | Lithium battery pole piece primary coating machine capable of repeatedly positioning and coating |
| CN114379198A (en) * | 2021-12-17 | 2022-04-22 | 陕西北人印刷机械有限责任公司 | Discharging tension matching method |
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Application publication date: 20200204 |
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