WO2016115854A1

WO2016115854A1 - Double-positioned cold-ironing system

Info

Publication number: WO2016115854A1
Application number: PCT/CN2015/084785
Authority: WO
Inventors: 简镇明; 汪俊学; 陈丰良
Original assignee: 厦门前润科技有限公司
Priority date: 2015-01-22
Filing date: 2015-07-22
Publication date: 2016-07-28
Also published as: CN104553273A

Abstract

A double-positioned cold-ironing system, comprising a displacement roller (8) driven by an electric motor, and a compression roller (9) thereof; an electric eye A (11) reading a cold-ironing film cursor (10) and an electric eye B (13) reading a printed matter cursor (12). The electric eye A (11) and the electric eye B (13) communicate with a computer control unit (3) respectively. The electric eye A (11) and the electric eye B (13) transmit respective read cursor signals to the computer control unit (3) respectively. The computer control unit (3) controls the electric motor and drives the displacement roller (8) to move forwards or backwards according to a difference value between the two cursor signals so as to perform fine tuning and calibration. The system can use a cold-ironing film (4) repeatedly many times and can transfer complete trademarks such as laser patterns (14) designed in advance to specified fixed positions on printed matter (6) so as to achieve positioned cold-ironing.

Description

Double positioning cold ironing system

Technical field

The invention belongs to the field of cold stamping printing technology, and particularly relates to a positioning cold ironing system in which a complete laser pattern (first pattern) on a cold foil film is overlapped with a glue pattern (second pattern) on a printed matter. Because it is the registration of the two patterns, it belongs to the dual positioning cold ironing system.

Background technique

The current cold-blowing system is a single-position cold-blowing system that transfers only the metal plating (non-complete pattern) on the cold-melting film to the specified position on the printed matter. As shown in FIG. 5, it comprises a unwinding unit (1), a winding unit (2) and a computer control unit (3). The cold foil film (4) is sent out from the unwinding unit (1), and passes around the roller (5). The partial glue pattern (20) printed on the printed matter (6) is bonded → UV light solidified → lifted → the metal plating layer is transferred onto the printed matter (6), and then sent to the winding unit (2) to wind up.

The shortcomings of the current single positioning cold foiling system are: 1. The cold foil film can only be used once, and the metal plating between the adjacent two hot stamping positions on the cold foil film is not fully utilized, and can only be used together with the used cold foil waste. Throw it away. According to statistics, the proportion of unused metal coatings is often as high as 80%. 2. It is not possible to transfer a trademark such as a complete fixed position laser pattern (14), which has been designed in advance, to a specified position on the printed matter.

The Chinese patent CN201151231Y "multi-color group positioning cold-hot transfer printing machine" and the Chinese patent CN101480867A "the method of realizing multi-color group positioning cold-hot transfer printing" are two documents submitted by the same applicant, the two patent application documents, Only the preliminary idea of the dual positioning cold-blowing system is proposed, neither the specific practical technical solution nor the working principle of the dual positioning is proposed. The general technical personnel in the field cannot manufacture the "multi-color group positioning" according to the application documents. Cold ironing transfer printing machine". The applicant has ordered from his applicant a “multi-color group positioning cold-blanking transfer printing machine (CN201151231Y)” as described in his patent several years ago, but his applicant has not yet been able to make available “multi-color group positioning”. Cold ironing transfer printing machine".

Summary of the invention

The object of the present invention is to provide a dual positioning cold foiling system, so that the cold foil film can be reused multiple times to transfer a complete laser pattern (first pattern) designed in advance to a designated position on the printed matter. On the glue pattern (the second pattern), the two figures are coincident.

The technical solution of a dual positioning cold ironing system of the present invention is as follows.

A dual positioning cold ironing system, including unwinding unit (1), winding unit (2) and computer control The unit (3), the cold foil film (4) is sent out from the unwinding unit (1), and is bonded to the partial glue pattern (20) printed on the printed matter (6) by the roller (5) → dry curing → peeling → will The metal plating (ie, the transfer layer) is transferred to the printed matter (6) and then sent to the winding unit (2) for winding; characterized in that it comprises:

1 The displacement roller (8) driven by the motor and its pressure roller (9), the displacement roller (8) doubles as the cold foil film (4) unwinding traction roller; the motor can be a variable frequency motor, a stepping motor, a servo motor Equal-programmed motor, preferably servo motor;

2 reading the electric eye A (11) of the cold foil cursor (10) and the electric eye B (13) reading the print cursor (12);

3 electric eye A (11) and electric eye B (13) are respectively connected with the computer control unit (3);

4 cold-blowing film (4) is wound around the shifting roller (8) and pressed by the pressing roller (9);

5 The cold foil film (4) is pulled forward together with the printed matter (6) (this time is basically synchronized); the electric eye A (11) and the electric eye B (13) respectively transmit the respective read cursor signals to the computer control unit (3) The computer control unit (3) adjusts the amount of micro-forward shifting of the motor-driven shifting roller (8) or the amount of rearward displacement of the shifting roller (8) according to the difference between the two cursor signals, thereby relaxing (ie shortening) a cold-blowing film (4) or an elongated cold-melting film (4) for fine-tuning correction (to achieve precise synchronization); the cursor signal described herein is information reflecting the instantaneous precise position of the printed matter (6) or the laser pattern (14); The difference between the two cursor signals may be a time difference or a displacement deviation value obtained by multiplying the time difference by the number of pulse signals of the synchronous encoder (15);

6 laser pattern on the cold foil film (4) (14) metal plating, or the remaining metal plating (18) on the cold foil film (4) used at least once, is cold-cast transferred to the local glue at the specified position on the printed matter (6) On the pattern (20), the two figures are coincident (ie, dual positioning).

Preferably, a synchronous encoder (15) for detecting the moving speed of the printing press is mounted on the printing press, and the synchronous encoder (15) is connected to the computer control unit (3); or, instead of the synchronous encoder (15), The (original) sync signal output from the press (directly) is connected to the computer control unit (3).

The synchronous encoder (15) and the synchronization signal of the present invention are linked to the computer control unit (3), and the computer control unit (3) detects the printing speed of the printed matter (6) and controls the double as the shifting roller (8). The traction roller, the traction cold foil film (4) follows the linear velocity of the printed matter (6), and runs synchronously with the printed matter (6) (substantially synchronized).

The function of the shifting roller (8) of the present invention is: according to the difference between the two cursor signals, a slight amount of forward displacement or a slight backward displacement, thereby elongating the cold foil film (4) or relaxing the cold foil film ( 4), to carry out micro Correction (and thus precise synchronization).

The partial glue pattern (20) of the present invention may be a UV light-curing glue printing layer, a hot air or infrared drying glue printing layer, or other quick-drying glue printing layers.

More preferably, the electric eye B (13) of the present invention is a generalized signal sensor, which may be a light-sensing trigger signal switch, a magnetic-sensing trigger signal switch, or a mechanical trigger signal switch. The cursor signal of the present invention may also be information output by the printing machine that reflects the instantaneous precise position of the printed matter (6). The cursor signal read by the electric eye B (13) may be information (one or more) emitted by the printing plate roller to reflect the precise position of the printed matter (6). In other words, each rotation of the printing plate roller can send one or more pulse signals to the computer control unit (3) through the electric eye B (13), so that the print cursor can be omitted on the printed matter (6). ) printing. In other words, the print cursor (12) is not necessarily provided on the printed matter (6), but may be disposed on the platen roller.

More preferably, the pitch y (17) of the printed matter (6) is preferably an integral multiple of the pitch j (16) of the laser pattern (14) for the purpose of saving the cold foil film (4) and reducing waste. . In other words, an integral multiple of the pitch j (16) of the laser pattern (14) is equal to the pitch y (17) of the printed matter (6). That is, y=n×j, n=1, 2, 3, 4, 5.... In this way, the cold foil film (4) can be used n times. For example, when n=1, the length of the required cold foil film (4) is equal to the layout length of all prints (6); when n=2, the length of the required cold foil film (4) is equal to one-half of all prints (6) The length of the typesetting; when n=3, the length of the required cold film (4) is equal to the length of one-third of all printed matter (6); when n=4, the length of the required cold-melting film (4) is equal to four-quarters. The layout length of a full print (6).

The working principle of the dual positioning cold ironing system of the invention is: when the spacing y (17) of the printed matter (6) is equal to the spacing j (16) of the laser pattern (14) on the cold foil film (4), theoretically, by artificial After the first laser pattern (14) on the cold-melting film (4) is aligned with the first printed matter (6), the cold-melting film (4) and the printed matter (6) are necessarily synchronously pulled forward together, and the second laser pattern is drawn. (14) and the second print (6) will also be aligned, the third laser pattern (14) and the third print (6) will also be aligned, and so on, the nth laser pattern (14) and The nth print (6) will also be aligned. However, due to the influence of many random variation factors such as the tension, stretchability, and ambient temperature of the cold-melting film (4), the cumulative error is inevitably caused, and the larger the n, the more misaligned and the more inaccurate. In other words, the more you go backwards, the more inaccurate and the more irregular. To this end, the correction method proposed by the dual positioning cold ironing system of the present invention is: detecting the partial glue map on the laser pattern (14) and the printed matter (6) at any time through the electric eye A (11) and the electric eye B (13). (20) Whether the alignment register and the error data are, and then the computer control unit (3) adjusts the motor according to the error data, drives the shift roller (8) to instantaneously shift slightly forward or instantaneously shifts backwards, thereby Slightly relax (ie shorten) the cold foil film (4) or slightly stretch the cold foil film (4) to achieve fine-tuning correction to achieve the purpose of dual positioning cold-hot registration. In other words, the slight change of the speed of the traction roller motor drives the cold-melting film (4) to change forward or backward, so that the relative position of the cold-melting film (4) and the printed matter (6) remains unchanged, and the compensation error is achieved. The elongated or relaxed (ie, shortened) cold-blowing film (4) described herein has an elongation or shortening amount depending on the difference between the two cursor signals, and each correction is only a few tens of micrometers. The adjustment is an instant fine adjustment, and the amount of expansion and contraction is within the range that the cold-melting film (4) material can withstand, in other words, the cold-melting film (4) is not broken, and is the premise that the cold-melting film (4) and the printed matter (6) are basically synchronized. Under the micro correction.

Studies have shown that by finely elongating the cold foil film (4) to achieve fine-tuning correction, the registration accuracy is higher, the registration error is less than 0.1 mm, and high-speed cold foiling can be achieved, and the speed can reach 150 m/min. On the contrary, if the fine-tuning correction is achieved by loosening (ie shortening) the cold-melting film (4), the registration accuracy is low, the registration error is greater than 0.3 mm, and only the bottom speed cold-blowing can be achieved, and the speed is not higher than 30 m/min.

In order to use perm slightly elongated film (4) A preferred method to achieve fine tuning correction design Usually perm film (4), should be a plurality of patterns of laser (14) in the row of the web plate ₁ L of the laser version of a Or a plurality of printed materials (6) are arranged on the printing plate of the L ₂ plate, and the difference between the two is L _{2 -} L ₁ ≤ 0.2 mm, so that the layout of the cold-melting film (4) is always slightly shorter than the printed matter (6) ) version of the web; in other words, cold foil membrane (4) should be tailored in accordance with print (6) of the version of the web to ensure that the difference Edition web L of ₁ print (6) of the plate width L ₂ and the laser pattern (14): L _{2 -} L ₁ ≤ 0.2 mm. The cold foil film (4) thus designed will always be in a state of being slightly elongated and fine-tuned.

Compared with the prior art, the present invention can produce the following advantageous effects.

First, the current cold foil film can be reused many times. The metal plating between the adjacent two hot stamping positions on the current cold foil film, that is, the remaining metal plating layer (18), can be reused, which can greatly save the cold foil film.

Secondly, it is possible to accurately transfer a trademark such as a complete laser pattern (14) designed in advance to a designated fixed position on the printed matter, thereby achieving dual positioning cold ironing.

The above described objects, features and advantages of the present invention will become more apparent from the aspects of the appended claims.

DRAWINGS

1 is a schematic view of a dual positioning cold foiling system of the present invention.

2 is a schematic view of a dual positioning cold foil film molded with a laser pattern trademark.

Figure 3 is a schematic view of the printed matter before hot stamping.

Figure 4 is a schematic view of the printed matter after hot stamping.

Figure 5 is a schematic illustration of a current (single positioning) cold foiling system.

Figure 6 is a schematic view of a cold stamping film having a laser pattern with a trademark density twice as high as that of Figure 2.

Fig. 7 is a schematic view showing the waste film of the cold-blowing film of Fig. 2 after being used once.

Figure 8 is a schematic view of a printed matter stamped using a hot stamping film once.

DESCRIPTION OF REFERENCE NUMERALS: 1-unwinding unit, 2-winding unit, 3-computer control unit, 4-cold foil, 5-over roller, 6-print, 7-UV light fixture, 8-shift roller, 9-press roller, 10-cold foil cursor, 11-electric eye A, 12-print cursor, 13-electric eye B, 14-laser pattern, 15-synchronous encoder, 16-(print) pitch y, 17- (laser pattern ) Spacing j, 18 - Residual metal plating, 19-round hot stamping, 20-partial glue pattern.

Embodiment 1.

1. Design and installation of mechanical and electrical systems.

According to the customer's needs, the printing machine equipped with the positioning cold-blowing system of the present invention is used for mapping of the installation position (including the fixed position mode and the installation method of the moving rail). It is required to map the mounting position of the synchronous encoder (15) and the mounting position of the electric eye B (13) of the print cursor (12).

The base, guide rail and bracket are designed according to the position and size of the survey.

Overall assembly after mechanical processing, assembly of electrical systems.

The positioning cold foiling system of the invention performs a power-on test before leaving the factory.

Installation to the customer's factory.

The dual positioning cold foiling system of the present invention is mounted on the printing press in accordance with the previously mounted mounting position.

The sync encoder (15) is coupled to the main drive shaft of the printer to detect the speed of the press; if the printer already has an encoder signal that can be used, it can be used directly.

The electric eye B (13) for reading the print cursor (12) is mounted on the printing press.

Second, debugging and synchronization parameters of the printing host.

Debugging the synchronization parameters of the dual positioning cold ironing system and the printing machine of the invention; if the transmission parameters of the printing machine are known, the parameters can be directly set in the man-machine screen of the computer control unit (3), and the system will Dynamically calculate the synchronization parameters with the printer.

If the parameter is unknown, it can also be calculated by the computer control unit (3). On the man-machine interface of the computer control unit (3), the synchronization parameter debugging interface is entered, and the perimeter of the plate cylinder mounted on the printing machine is set to the interface. Inside, the printing machine opens a fixed speed (50m/min or more); pressing the parameters in the interface to calculate the initial synchronization parameters, the calculated parameters are not necessarily accurate, and the actual material needs to be taken. Run, and manually debug the arrival request, and then press the actuarial in the interface, the computer control unit will accurately calculate the synchronization parameters.

According to the dressing diagram, wear the positioning cold film (4) to run, let the printing machine print the pattern, adjust the electric eye B (13) to read the print cursor (12), adjust the electric eye A (11) to read the cold foil cursor (10); Operate the man-machine screen of the computer control unit (3), observe the change of the difference (registration deviation) between the read cursor signals, and correct the actual synchronization accuracy with the printing machine by synchronous compensation. The deviation is always positive. When the direction is increased, the synchronization ratio is decreased. Otherwise, the synchronization ratio is increased when the direction is increased in the negative direction until the change of the deviation is stabilized, and the synchronization parameter is adjusted accurately; then returning to the parameter adjustment interface of the human-machine interface, pressing the parameter actuarial The computer control unit (3) will save the exact synchronization parameters.

Third, run.

According to the requirements of the dual positioning cold ironing system of the present invention, the cold foil film (4) with or with the positioning pattern is put on the printing machine, the machine is operated, and the shift roller is adjusted according to the pattern on the printed matter (6) through the switch on the operation panel ( 8), transfer the laser pattern (14) on the cold foil film (4) to the desired position on the printed matter (6) - that is, the partial glue pattern (20), press the "position save" button and then press "automatic registration". ”, at this time, the computer control unit (3) will automatically track the position of the cold foil (4) according to the saved position parameter, that is, the reference difference between the two cursor signals, and automatically adjust. For example, when the difference between the laser pattern (14) detected by the electric eye A (11) and the electric eye B (13) and the two cursor signals of the printed matter (6) is greater than the reference difference, the computer control unit (3) regulates the motor, The displacement roller (8) is driven to move slightly forward, and the cold foil (4) is slightly elongated to achieve fine adjustment correction. Conversely, when the difference between the laser pattern (14) detected by the electric eye A (11) and the electric eye B (13) and the two cursor signals of the printed matter (6) is less than the reference difference, the computer control unit (3) regulates the motor, The displacement roller (8) is driven to move rearward slightly, and the cold foil (4) is slightly relaxed (ie, shortened) to achieve fine adjustment correction.

In the normal production process, if it is necessary to adjust the position of the laser pattern (14) after the transfer, fine adjustment can be made by moving the switch on the operation panel forward or backward.

Example 2.

Referring to Figure 1 and the above example, the dual positioning scalding system of the present invention is designed and fabricated and mounted on a printing press in accordance with the previously mapped position. A sync encoder (15) is coupled to the main drive shaft of the printer to detect the speed of the press. The electric eye B (13) for reading the print cursor (12) is mounted on the current flexographic label printer.

As shown in Fig. 3, the printed matter (6) to be printed is designed. The printed matter (6) is a rectangular rounded self-adhesive label of 104 mm × 64 mm, and the typesetting length y (17) of one label is 108.03 mm, and the edge of each label is A 6mm × 4mm black print cursor (12) is printed at the same position, and the distance between the cursors is also 108.03mm. The print (6) was printed on a current flexographic sticker printer.

As shown in FIG. 3 and FIG. 4, in the upper right corner of each label, a partial glue pattern (20) of a pentagonal shape with a diameter of 15 mm is printed at a position of 20 mm from the upper edge and 16 mm from the right edge, and the double positioning of the present invention is adopted. The cold ironing system bonds the five-pointed star laser pattern (14) on the cold-melting film (4) to the partial glue pattern (20), and then peels off the cold-melt film (4), and then the five-pointed star laser pattern (14) Transfer to print (6).

As shown in Fig. 2, to the manufacturer of the cold-blowing film (4) of the laser pattern (14), a cold-melting film (4) is provided, which is provided with a laser pattern (14) having a diameter of 15 mm, and a laser pattern ( 14) The typesetting length is 108 mm, which is about the same as the print layout length. A 6mm × 4mm cold foil cursor (10) is placed at the same position on the edge of each laser pattern (14), and the distance between the cursors is also 108 mm. In this case, the following layout design can be adopted: 3 laser patterns (14) are arranged on a laser molded version with a width (ie circumference) of L ₁ = 324 mm, and 3 prints (6) are arranged in the layout ( That is, the plate having a circumference of L ₂ = 324.1 mm has a difference of L _{2 -} L ₁ = 0.1 mm.

According to Figure 1, wear the positioning cold film (4), let the printing machine print the label pattern and the partial glue pattern (20), adjust the electric eye B (13) to read the print cursor (12), adjust the electric eye A (11) to read Go to the cold foil cursor (10); operate the computer screen of the computer control unit (3), observe the change of the difference (registration deviation) between the read cursor signals, and correct the actual operation with the printer by synchronous compensation. Synchronization accuracy, the synchronization ratio decreases when the deviation increases in the positive direction, and the synchronization ratio increases when the direction increases in the negative direction until the change of the deviation is stable, and the synchronization parameter is adjusted accurately.

According to the requirements of the dual positioning cold ironing system of the present invention, the cold foil film (4) with the positioning pattern is threaded onto the printing machine, and the machine is operated, and the switch on the operation panel is operated according to the pattern burned on the printed matter (6). Adjust the shifting roller (8) to transfer the laser pattern (14) on the positioning cold foil film (4) to the desired position on the printed matter (6) - the local glue pattern (20), that is, 20 mm from the upper edge and the right side Along the 16mm position. Press the “Location Save” button and then press the “Auto Registration” button. At this time, the computer control unit (3) will automatically track the cold foil according to the saved position parameters (ie the reference difference between the two cursor signals). 4) The position is automatically adjusted.

Example 3.

As shown in Fig. 3, the printed matter (6) to be printed is designed. The printed matter (6) is a rectangular rounded self-adhesive label of 104 mm × 64 mm, and the label pitch y (17) is 108 mm, and the same position of each label edge is printed. Set a 6mm × 4mm black print cursor (12), the cursor spacing is also 108mm. The print (6) was printed on a current flexographic sticker printer.

As shown in Fig. 8, in the upper right corner of each label, a circular silver mark (19) having a diameter of 15 mm is stamped at a distance of 20 mm from the upper edge and 16 mm from the right edge.

As shown in Fig. 7, prepare the cold foil film (4) used once in the above example. The cold foil film (4) can be either a positioning cold foil film or a current non-positioning cold foil film.

Wear the cold foil film (4) as shown in Figure 1, let the printing machine print the label pattern and the partial glue pattern (20), adjust the electric eye B (13) to read the print cursor (12), adjust the electric eye A (11) to read Cold film cursor (10); operate the computer screen of the computer control unit (3), observe the change of the difference (registration deviation) between the read cursor signals, and correct the actual synchronization with the printing machine through synchronous compensation. Accuracy, when the deviation increases in the positive direction, the synchronization ratio is decreased. Conversely, when the deviation increases in the negative direction, the synchronization ratio is increased until the deviation of the deviation is stabilized, and the synchronization parameter is adjusted accurately.

According to the requirements of the dual positioning cold ironing system of the present invention, the cold foil film (4) used once is threaded onto the printing machine, and the machine is operated to adjust the displacement according to the pattern on the printed panel (6) through the switch on the operation panel. Roller (8) to transfer the remaining metal plating (18) on the cold foil film (4) to the printed matter (6) The desired position on the top forms a metal transfer layer identical to the partial glue pattern (20), i.e., a silver circular hot stamping mark (19) having a diameter of 15 mm. Press the “Location Save” button and then press the “Auto Registration” button. At this time, the computer control unit (3) will automatically track the cold film according to the saved position parameters (ie the reference difference between the two cursor signals). ) and automatically adjust the position.

In the normal production process, if it is necessary to adjust the position of the remaining metal plating (18) after the transfer, fine adjustment can be made by moving the switch on the operation panel forward or backward.

In this way, the cold foil film (4) used in the above example can be reused once, thereby saving the cold foil film (4) resources and reducing waste.

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, and thus equivalent changes made in the claims of the present invention are still within the scope of the present invention.

Claims

A dual positioning cold ironing system, comprising a unwinding unit (1), a winding unit (2) and a computer control unit (3), the cold foil film (4) is sent out from the unwinding unit (1), and passes around the roller (5) The partial glue pattern (20) printed on the printed matter (6) is bonded→dried and cured→lifted→the metal plating layer is transferred onto the printed matter (6), and then sent to the winding unit (2) to wind up; characterized in that it includes :

1 a displacement roller (8) driven by a motor and a pressure roller (9) thereof, and a displacement roller (8) doubles as a cold foil film (4) unwinding traction roller;

2 reading the electric eye A (11) of the cold foil cursor (10) and the electric eye B (13) reading the print cursor (12);

3 electric eye A (11) and electric eye B (13) are respectively connected with the computer control unit (3);

4 cold-blowing film (4) is wound around the shifting roller (8) and pressed by the pressing roller (9);

5 cold film (4) is pulled forward together with the printed matter (6); the electric eye A (11) and the electric eye B (13) respectively transmit the respective read cursor signals to the computer control unit (3); the computer control unit ( 3) According to the difference between the two cursor signals, adjust the amount of micro-forward displacement of the motor-driven shifting roller (8) or the amount of backward displacement, thereby relaxing the cold-melting film (4) or elongating cold foil Membrane (4) for fine adjustment correction;

6 laser pattern on the cold foil film (4) (14) metal plating, or the remaining metal plating (18) on the cold foil film (4) used at least once, is cold-cast transferred to the local glue at the specified position on the printed matter (6) On the pattern (20).
A dual positioning cold foiling system according to claim 1 wherein: a synchronous encoder (15) for detecting the speed of movement of the printing press is mounted on the printing press, and the synchronous encoder (15) is in communication with the computer control unit (3); or , the synchronization signal outputted by the printing machine is connected to the computer control unit (3).
The dual positioning cold foiling system according to claim 1 or 2, characterized in that the cursor signal read by the electric eye B (13) is information which reflects the instantaneous position of the printed matter (6) emitted by the printing plate roller.
The dual positioning cold foiling system according to claim 1 or 2, characterized in that the pitch y (17) of the printed matter (6) is an integral multiple of the pitch j (16) of the laser pattern (14).