WO2004000556A1

WO2004000556A1 - Intaglio printing device, the printing products made by this device and the process for producing the products

Info

Publication number: WO2004000556A1
Application number: PCT/CN2002/000762
Authority: WO
Inventors: Genxu Li; Renxuan Ma; Zhiquan Jiang
Original assignee: China Banknote Printing And Minting Corporation
Priority date: 2002-06-24
Filing date: 2002-10-29
Publication date: 2003-12-31
Also published as: CN1465482A; JP2005519796A; DE10297528B4; CN1236931C; JP4188317B2; DE10297528T5; AU2002368050A1; CH695446A5

Abstract

The present invention relates to engraved intaglio printing. In particular, the invention provides an Intaglio printing device, the printing products made by this device and the process for producing the products. In the process, the printing stock is input between a plate cylinder and a transfer/impression cylinder at intervals, the ratio of plate number of the plate cylinder is the ratio of an even number to an odd number. After rolling impression, a printing product which has at least one unsmooth surface is obtained in only one double-sided printing run. The invention overcomes the defects in known art, and can achieve double-sided engraved intaglio printing in one process. The intaglio characters and patterns in intaglio face-to-face printing can be transferred mirror-imaged and identified exactly. Thus, the mirror-imaged intaglio face-to-face printing of the pattern on both sides of the printing stock can be achieved. The precision of which is greatly higher than that of the offset face-to-face printing. The ability of Anti-forge is enhanced, the printing technological flow and the printing cycle can be shortened, the cost of printing can be reduced, and the labor capacity can be improved.

Description

Gravure printing equipment, method and printed product

FIELD OF THE INVENTION The present invention relates to an engraving gravure printing technology, and more particularly, to an engraving gravure printing device capable of printing both banknotes and other high anti-counterfeiting products at the same time on both sides of which at least one side has unevenness. , Methods and their prints. BACKGROUND OF THE INVENTION The double-sided printing process is an effective anti-counterfeiting printing technology. This anti-counterfeiting method depends on high-precision printing machinery and / or special printing processes. Since the effect of double-sided printing can be identified without the aid of tools, and it is difficult to counterfeit, it is an effective anti-counterfeiting technology.

The well-known offset printing techniques include one-time positioning of paper, cross-printing on both sides, and offset printing; two-position positioning of paper, adhesive and offset printing. China Yinmiao special 245 曱 type machine is one of the representative models of paper positioning at the same time, both sides of the glue, glue on the printing. China's third, fourth, and fifth sets of RMB and most of the world's banknotes use this technology.

The German Heidelberg company developed a commercial offset reversing cylinder double-sided offset printing machine after the 1980s, which can achieve the effect of accurate double-sided offset printing and challenge the anti-counterfeiting status of the existing proprietary printing technology of banknote printing. The offset printing of the commercial offset printing machine is to install the front and back printing plates on two printing plate cylinders respectively, and the paper is reversed to realize the two-sided printing of the offset printing plate by reversing the cylinder. This type of two-position registration printing has paper transfer. Errors and mechanical system errors cannot meet the printing accuracy requirements of banknote anti-counterfeiting.

Four-color Super Orlof Intagl io Press dedicated for banknote printing produced by Swiss De La Rue Giori. SA (2000) and made in Nanjing, a subsidiary of China Banknote Printing and Minting Corporation The Type 92 Gravure (W-92) banknote printing machine currently produced by the mint represents the highest level of engraving gravure printing machines, but because of their mechanical structure, special gravure cylinders (on which only The structure of installing the same pattern of gravure) and impression cylinder (without transfer function) can only realize single-sided printing, does not have the function of double-sided simultaneous printing, and cannot realize the engraving gravure-to-print printing process.

In addition, the well-known engraving gravure printing technology is to print one side at a time, and after a certain period of aging treatment, perform the second printing on the other side. Because the engraving gravure has a large pressure, when the substrate (usually paper) After the deformation of one imprint, the printing accuracy will be affected during the second printing. In addition, during the drying of the ink between the two printings, the temperature and humidity will cause the deformation of the paper, so the engraving gravure Printing has not been able to achieve accurate double-sided printing.

The embossing material used on the impression cylinder of the known engraving gravure printing machine is usually a blanket, and the substrate is a fibrous material, which is suitable for single-sided gravure printing. However, if it is used for intaglio printing, it will cause expansion and contraction under high-intensity pressure, and the printing pattern mounted on it will be displaced and deformed during embossing, which will affect the printing quality and printing effect of the other pattern.

The well-known gravure technology uses a single-channel ink supply system. Only one color stencil is installed on a color die cylinder, and double-sided printing cannot be achieved from the ink transfer.

In addition, in some countries with developed banknote printing technology, in the early 1970s, concave and offset banknotes were introduced. The most representative is the French franc of 500 round face value. Although the printing effect of the front and back printing has good anti-counterfeiting functions, it is limited by the printing machinery, machine speed, paper, and process conditions, and the technical development space is very small. It has not been promoted and has been eliminated. . In recent years, the German company G + D has launched a sample of concave and concave printing, which is printed twice on both the front and back. Therefore, the accuracy of the printing is poor and the substantive meaning of the printing is lost. Therefore, this technology has not been applied to formal production. SUMMARY OF THE INVENTION The technical problem to be solved by the present invention is to provide a gravure printing device, method and printed matter thereof, particularly a engraved gravure printing on both sides at the same time, and 1H] characters and patterns in gravure printing on the printing. A gravure printing device, method and printed product capable of mirror flipping and normal identification, realizing two-sided patterns of a printed matter, and mirror-to-gravure printing to improve the anti-counterfeiting ability of the printed matter (such as a magic ticket). The technical solution of the present invention is: The present invention provides an engraved gravure print, which is a gravure print that is formed on both the front and the back at one time, and at least one side of which has an uneven pattern; the front and back sides of the printed product are printed The pattern can be partially or completely mirror-printed; and the pattern printed on the front and back of the one-time printed product can have more than one color.

The present invention also provides an apparatus for manufacturing the intaglio printed matter as described above, including:

A paper control unit includes a paper transfer cylinder and a paper discharge cylinder connected to the transfer / imprint cylinder. A printing plate cylinder, which is provided with an even number of gravure printing plates;

A transfer / embossing cylinder, which is provided with an odd number of transfer plates;

An ink supply system, which is connected to the plate cylinder and can supply ink to it;

A plate erasing roller, which is connected with the plate cylinder, can erase the non-patterned ink on the plate.

In the gravure printing apparatus as described above, the ratio of the diameter of the plate cylinder to the transfer / imprint cylinder is equal to the ratio of the number of plates.

In the gravure printing apparatus as described above, the printing plate cylinder is provided with two printing plates at intervals.

The gravure printing equipment as described above, the plate cylinder may be provided with two or more intaglio plates of different patterns or the same pattern, and the transfer / imprint cylinder may be provided with three or more odd plates. Transfer / embossing area in cooperation with the plate cylinder.

In the gravure printing apparatus as described above, the diameters of the plate cylinder and the transfer / imprint cylinder are not equal.

The gravure printing apparatus as described above, the ink supply system has a color collecting cylinder which is in contact with the printing plate cylinder and is in rolling contact therewith. The color collecting cylinder is provided with at least one color die cylinder in rolling contact with the peripheral side of the color collecting cylinder, and more than one color cylinder. The plate transfer roller is connected to the color mold roller, and the color mold roller can accept the oil transmitted by the plate transfer roller.

The gravure printing apparatus as described above, the color collecting cylinder is provided with an even number of color collecting rubbers, and the color mold cylinder is provided with an even number of color stencils.

In the gravure printing apparatus as described above, the color die cylinder may be provided with two plate transfer rollers that supply its ink. And the diameter ratio of the color collecting cylinder, the color mold cylinder and the printing plate cylinder is equal to the set number ratio. In the gravure printing device as described above, the color collecting cylinder may be provided in a double-plate arrangement, and a color collecting rubber having the same number of gravure plates as provided on the plate cylinder may also be provided.

In the gravure printing equipment as described above, the color die cylinder may be provided in a double-plate mode, and a color die plate equal to the number of intaglio plates provided on the plate cylinder may also be provided.

In the gravure printing apparatus as described above, a sheet feeding device is provided at the front of the transfer roller.

The present invention further provides a method for manufacturing a gravure printing as described above, which method comprises (a) inputting substrates at intervals; (b) the number of printing plates set by the printing plate cylinder and the number of printing plates provided by the transfer / embossing cylinder. The transfer embossing (c) with an even-to-odd-ratio ratio of the transfer printing plate is used to output a double-sided printed product at one time.

The gravure printing method as described above, wherein the plate cylinder is provided with an even number of gravure plates, and the transfer / imprint cylinder is provided with an odd number of transfer plates. The plate cylinder is provided with gravure plates with two different or same patterns on the front and back of the substrate at intervals. The transmission ratio of the plate cylinder to the transfer / imprint cylinder is equal to the ratio of the number of transfer plates provided on the transfer / imprint cylinder to the number of gravure plates provided on the plate cylinder.

'' The gravure printing method described above further includes an ink supply system having a color collecting cylinder, a color mold cylinder, and a plate transfer roller. The color collecting roller and the color mold roller are respectively provided with an even number of color collecting rubbers and an even number of color stencils, and the two color printing rollers are used to supply ink to the color mold roller. The diameter ratio of the color collecting cylinder, the color mold cylinder and the printing plate cylinder is equal to the number of plates set thereon, and its transmission ratio is inversely proportional to its diameter ratio. ―

In the gravure printing method described above, when there is no substrate in the embossing area, the gravure A or B plate provided on the plate cylinder can be separated from each rotation on the transfer / imprint cylinder during the rotation of the cylinder. The printing plates correspond to each other in turn. When a substrate passes through the embossing area, the printing plate cylinder and the transfer / imprint cylinder print two different patterns, front and back, on the front and back sides of the substrate at a time, so that the substrate can complete both sides at once. Gravure printing.

The gravure printing method as described above, the gravure printing plates on the printing plate cylinder can be arranged at even intervals, which are respectively two kinds of gravure printing plates with different patterns on the front and the back of the substrate. The transfer / embossing cylinder is set with an odd number of transfer plates; one of the gravure plates provided on the plate cylinder can be respectively overlapped with the transfer plate on the transfer / imprint cylinder in the embossing area. . The printing plate cylinder and the rotation The diameter ratio of the printing / embossing cylinder is equal to the ratio of the number of printing plate blocks, and the linear speeds of the printing cylinder and the transfer / embossing cylinder are equal.

The above-mentioned gravure printing method further includes a plate material that can serve as both an imprint material and a transfer material. This plate material is coated on a metal sheet of 0.30 mm-0.5 Oram. Or glue flexible materials such as nylon, PVC, rubber and plastic. Its coating thickness is 0.3-0.6 mm, and the hardness reaches 80-98 degrees.

In the gravure printing method as described above, when one of the transfer plates provided on the transfer / embossing cylinder corresponds to one of the gravure plates provided on the plate cylinder, there is no substrate and it is in contact with the plate cylinder. The pattern is transferred to the transfer plate of the transfer / imprint cylinder, so that it has the transfer function. When the substrate enters the embossing area with the transfer / imprint cylinder, the pattern of its printing plate is printed on the plate cylinder. While embossing on one side of the substrate, the transfer / imprint cylinder transfers the pattern on the other side of the substrate to complete the simultaneous printing of both sides of the substrate.

In the gravure printing method described above, during the printing process, the color die cylinder provided with an even number of color stencils passes the ink to the color collecting cylinder one-to-one correspondingly, and then to the even number of gravure plates provided on the printing plate. . The two plate-by-plate transfer rollers that supply the ink of the color mold cylinder use a cam control mechanism to control the separation and combination of the two with the color mold cylinder, so as to realize the corresponding supply of ink to the color collection cylinder in order, and then transfer them to the printing respectively. Man with plate cylinder, B gravure plate.

Compared with the currently known gravure technology, the present invention can complete the simultaneous printing of the front and back sides of a substrate, thereby realizing gravure printing, and enhancing the feel of the gravure on the printed product, which improves the anti-counterfeiting requirements. The first-line anti-counterfeiting function of printed materials (such as banknotes and securities) makes it easier for the public to identify the authenticity of printed materials. The intaglio printing technology of the invention can shorten the printing process flow and printing cycle, reduce printing costs, and improve labor productivity. The known offset printing can only be realized on an offset printing machine. The front and back printing plates are respectively installed on two printing plate cylinders. The commercial machine realizes the offset printing by reversing the positioning of the two cylinders. Both the front and back printing plates of the present invention are installed on On the same plate cylinder, the error source that affects the printing is only the positioning error of the printing plate, which avoids the errors of other mechanical systems and paper deformation that offset printing has. Therefore, the gravure printing accuracy of the present invention is higher than that of offset printing.印压量。 Printing accuracy. The printing error between the gravure printing lines of the present invention is less than ± 0. 10mm, far better than offset printing accuracy. In addition, the gravure printing machine of the present invention has six colors (the existing gravure printing machine has 4 colors), which provides a more flexible color selection for future anti-counterfeiting printing designs. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of the printing principle of the present invention;

FIG. 2 is a schematic structural diagram of another embodiment of the present invention. DETAILED DESCRIPTION The technical solution of the present invention will be described in further detail below with reference to the accompanying drawings.

As shown in FIG. 1, the printing apparatus includes: a paper feeding section, which includes a paper transfer roller 1 and an interval paper feeding control mechanism (not shown in the figure) located on the upper left side of the transfer / imprint cylinder 2; Section, which includes a paper ejection roller 7 and a delivery mechanism (not shown) located on the upper right side of the transfer / imprint cylinder 2; a printing section, which includes a transfer / imprint cylinder 2 and a printing plate A cylinder 3 and a plate-making roller 4; an ink supply system including a color collecting cylinder 5; three color mold cylinders 6; a six-channel ink supply mechanism; each color mold cylinder has two ink supply mechanisms for ink supply. .

An even number of gravure plates are provided on the printing plate cylinder 3, and the gravure plate has two patterns, which are arranged on the printing plate cylinder 3 at intervals. An odd number of printing plates are provided on the transfer / imprint cylinder 2. The ratio of the diameter of the plate cylinder 3 to the transfer / imprint cylinder 2 is equal to the ratio of the number of plates; and the linear speeds of the plate cylinder and the transfer / imprint cylinder are equal.

The color collecting cylinder 5 of the ink supply system is located on the side of the printing plate cylinder 3 and is in rolling contact with it. The color collecting cylinder 5 is provided with three color mold cylinders 6 in rolling contact with the peripheral side thereof. Accept the ink transfer by plate transfer rollers I, 1 ', II, II, III, III. The color collecting drum 5 is provided with an even number of color collecting rubbers A ,, Β, and the three color die rollers 6 are respectively provided with an even number of color template AI, BI, Α Π, Β Ι ΑΠΙ, ΒΠΙ. The diameter ratio of the color collecting cylinder 5, the color mold cylinder 6 and the printing plate cylinder 3 is equal to the number of plates set thereon.

The process of the present invention is as follows: a first intaglio printing plate A and a second intaglio printing plate B with two different or same patterns on the front and back of the substrate are arranged on the printing plate cylinder 3 on which an even number of intaglio printing plates can be arranged, An odd number of transfer (imprint) plates a, b, and c are mounted on the transfer / imprint cylinder 1 which is in contact with the eye roller; the ink supply system supplies ink to the plate cylinder; after the plate cylinder is inked, After the printing plate is wiped by the platen roller 4 during the rotation, the embossing area is input; the sheet feeding mechanism feeds the substrate to the transfer / embossing cylinder at intervals through the transfer cylinder 1.

The transmission ratio of the plate cylinder 3 and the transfer / imprint cylinder 2 is equal to the ratio of the number of plate blocks provided on the transfer / imprint cylinder 3 to the number of gravure plates provided on the plate cylinder 3.

During the printing process, the color collecting cylinder 5 provided with an even number of color collecting rubbers, and the color mold cylinder 6 having an even number of color standard plates will rely on the plate transfer rollers I, I, (or II, II, or III). , ΠΓ) The ink sent out is transferred to the even-numbered gravure plate B provided on the plate cylinder one by one. Each of the color mold rollers 6 described above has two ink supply mechanisms for ink supply, that is, the two plate transfer rollers I, I, (or II, Ι, or III, ΠΓ) that supply the ink of the color mold roller 6 rely on a cam. The control of the control mechanism realizes corresponding ink supply to the first gravure plate A and the second gravure plate B on the printing plate cylinder 3, respectively.

When there is no substrate in the embossing area, the first or second gravure plate provided on the plate cylinder 3 can be directly connected with each transfer (imprint on the transfer / imprint cylinder 2 respectively) during the rotation of the cylinder. ) The plates correspond to each other in order, and the patterns on the first or second gravure plate are transferred to the surface of each plate of the transfer / imprint cylinder 2.

When a substrate passes through the embossing area, the plate cylinder 3 and the transfer / imprint cylinder 2 transfer the front and back patterns to the front and back sides of the substrate at one time during rolling, so that the substrate can complete the concave on both sides at one time. Printing.

The above imprint / transfer cylinder 2 respectively realizes the heavy weight function of the imprint cylinder and the plate cylinder during the printing process, that is, when there is no substrate in the imprint area, it acts as a plate function and is a carrier for receiving printing patterns; and In the presence of substrates, it exhibits the function of embossing and printing plates. In order to realize the above-mentioned dual functions of the imprint / transfer cylinder, and to ensure that the printing pattern on the transfer / imprint cylinder does not cause deformation and displacement during the printing process, a new type of embossing material is used instead of the traditional blanket in the present invention. The printing plate made of this material does not cause deformation and displacement during the printing process. The imprint material of the printing plate is coated on a metal plate with a Flexible materials for printing inks.

The at least one side of the one-time formed gravure printing product of the present invention has uneven patterns, and the patterns printed on the front and back sides of the printing can partially or completely mirror correspondingly, and have more than one color. As a result, the anti-counterfeiting function of the printed matter is improved, and it is convenient for the public to identify the authenticity of the printed matter.

The specific structure and process flow of the technical solution of the present invention will be described in detail below with reference to specific embodiments and drawings.

Example 1

In this embodiment, as shown in FIG. 1, the printing plate cylinder 3 may be provided with two first and second gravure plates with different patterns. For the convenience of description, the first gravure plate is set. The front side of the substrate is referred to as the A version, and the second gravure plate is the back side of the 7 printed objects, referred to as the B version. The transfer / embossing cylinder 1 may be provided with three transfer / embossing areas that cooperate with the plate cylinder, and three transfer plates a, b, and c are provided thereon. The diameter of the printing plate cylinder 3 and the transfer / imprinting cylinder 2 and the number of plate loading are in a ratio of 2: 3, and its transmission ratio is 3: 2, thereby ensuring that the gravure printing plate on the printing plate cylinder 3 can be separately transferred from the The three transfer plates a, b, and c on the printing / imprinting cylinder 2 are correspondingly overlapped in sequence in the embossing area. Through the sheet feeding mechanism (not shown in the figure) in front of the transfer cylinder 1, the substrate is passed through the transfer / imprint cylinder 2 at intervals (when there is a substrate on the a plate on the transfer / imprint cylinder 2) At the same time, there is no substrate on the subsequent b-plate, and there is a substrate on the c-plate, and so on). In this way, when the plate a, plate b, or plate c on the transfer / imprint cylinder corresponds to the plate B of plate cylinder 3 and comes into contact with it, the plate B on plate cylinder 3 will The inked and plate-printed pattern is transferred to the a, b, or c plate of the transfer / imprint cylinder 2 to make the imprint. The cylinder 2 has the function of a plate cylinder (carrying printed patterns). When the substrate enters the embossing area with the transfer / imprint cylinder 1, the plate cylinder 3 transfers the pattern of its A plate to the front side of the substrate (complete typical direct gravure). At the same time, the transfer / imprint cylinder 2 transfers the pattern on the B plate onto the back of the substrate (completes indirect gravure printing), so that one side of the gravure printing can be printed at the same time.

The following describes the printing process of the present invention in detail with reference to Table 1:

Table I Previous to next correspondence order ① ② ③ ④ ⑤ ⑥

Cycle Cycle c a b c a b c a

No Yes No Yes No Yes No No Yes Plate cylinder 3 turns three times B A B A B A B A

Analyzing from the principle of brush printing, it is necessary to use two printing plates to print on the front and back of the substrate at the same time, which can only be achieved through a combination of indirect printing and direct printing.

When using this process for double-sided printing, the paper feeding method of the paper feeding section of the gravure printing machine should be selected as the interval paper feeding method, that is, the paper feed roller 1 feeds a sheet of paper, idles for one week, and then feeds another sheet of paper. Idle for a week ... As a result, the three transfer plates a, b, and c of the transfer / imprint cylinder 2 appear as follows with or without paper, respectively:

The first week: & Yes → 1) None →. Have;

The second week: a no → 1 yes →. no.

Since the transfer / imprint cylinder 1 and the plate cylinder 3 are provided with a transmission ratio of 2: 3. That is, when the plate cylinder 3 is loaded with two gravure plates A and B (front and back plates) and rotated for three cycles, the transfer / imprint cylinder 2 is also rotated for two cycles at the same time, and the two rolls complete a corresponding cycle. .

The corresponding printing relationship between the A and B plates of plate cylinder 3 and the three plates a, b, and c of transfer / imprint cylinder 1 occurs as follows:

It can be known from the rotation direction shown in FIG. 1 that the printing plate cylinder 3 first obtains ink from the color collecting cylinder 5 and then wipes off the non-patterned ink through the plate cleaning roller 4 to enter the printing stage. As shown in FIG. 1, at this time, the printing plate c of the transfer / imprint cylinder 1 just enters the printing area, and it has a printing (corresponding) relationship with the gravure plate A of the printing cylinder 3 (that is, the corresponding sequence in Table 1) ③ ). Looking at the situation indicated by the vertical line of the serial number ③ in Table 1, it can be seen that the printing plate c has paper, so the pattern on the gravure plate A is transferred to the front surface of the substrate (paper) during printing (assuming that the paper on the paperboard is Back up, front down). What is the condition on the back of the paper at this time? Just trace back to the printing cycle of the plate cylinder 3 and the transfer / imprint cylinder 2 It should be known that from the situation shown in the vertical line where the "previous cycle" is located in Table 1, the printing plate c of the transfer / impression cylinder 2 is paperless, and the printing plate B of the printing cylinder 3 is The pattern is transferred onto the printing plate c of the transfer / imprint cylinder 2. Therefore, in the above-mentioned case, when the pattern on the gravure plate A is transferred to the front side of the paper during printing, the transfer / The pattern of the gravure plate B left by the printing plate c of the impression cylinder 2 in the previous cycle is also transferred to the back of the paper. The pattern of the two gravure plates is printed on the paper at the same time. Zhang Zheng, on the back.

After the printing is completed, the transfer / imprint cylinder 2 continues to rotate, and when the printing plate c thereon is held to the position where it intersects with the output cylinder 7, the ejected teeth are taken out into the paper receiving section.

The transfer / imprint cylinder 2 rotates another 120 °, and its printing plate a is in a printing relationship with the gravure plate B of the printing plate cylinder 3. Since printing plate a has no paper (the corresponding order in Table 1), the gravure printing The plate B is in direct contact with the transfer / embossing plate of the printing plate a, so the ink in the pattern of the printing plate B is transferred () to the surface of the printing plate a of the transfer / embossing cylinder 2. The machine continues to run, and the printing plate b of the transfer / imprint cylinder 2 has a printing relationship with the gravure plate A (corresponding order ⑤). As the printing plate b has paper, the ink in the pattern of the gravure plate A is printed. The front side of the paper. Tracing the situation on the back of the paper at this time, that is, the condition of the surface of the printing plate b of the transfer / imprint cylinder 1 in the previous round, it can be seen from the corresponding relationship ② that the printing plate b and the gravure plate B of the transfer / imprint cylinder 1 The printing relationship occurred in the previous round, but the printing plate b was in a paperless state. Therefore, the ink in the gravure plate B pattern was transferred (printed) on the surface of the printing plate b. According to the retrospective situation, it can be determined that at this time (the current round) the surface of the printing plate b in contact with the back of the paper has the ink pattern transmitted by the gravure plate B. Therefore, when the printing plate b (with paper) is in contact with the gravure plate A , Not only the pattern of the gravure plate A is transferred to the front side of the paper (direct printing), but also the pattern of the previous round of gravure plate B left on the surface of the printing plate b (indirect printing). Completed the printing process of two different gravure plates on the front and back of the paper at one time.

The transfer / embossing cylinder 2 realizes the functions of the imprinting cylinder and the plate cylinder during the printing process respectively, that is, it functions as a printing plate when there is no substrate in the embossing area, and it accepts the carrier of the printing pattern. Shows embossing and plate silent function.

The materials of the transfer plates a, b, and c provided on the transfer / embossing cylinder 2 of the present invention can be used as the embossing material on the transfer plate, and at the same time, they are special plates for transfer printing. This plate is in 0.30mm-0.60 The thin metal sheet is coated with flexible materials that can adapt to transfer printing, such as nylon, PVC, rubber and plastic. Its coating thickness is 0.3-0.6mm, and the hardness can reach 80-98 degrees Shore. When the transfer / imprint cylinder 2 with the dual functions of the impression cylinder and the plate cylinder is in a printing relationship with the plate cylinder 3, the printing pattern on the plate cylinder 3 will not be deformed and displaced during the printing process, which ensures that Correspondence of the mirror pattern on the front and back of the substrate during printing.

In the printing process of this embodiment, the process of positioning and transferring the final plate of the ink is as follows:

Referring to FIG. 1, the printing plate cylinder 3, the color collecting cylinder 5 and the three color mold cylinders 6 are all set as double plates, that is, the color collecting cylinder 5 and the three color pattern cylinders 6 are set to correspond to the printing plate cylinder 3. The two color collecting rubbers A, B, and color template AI, BI, AII, BII and ΑΙΠ, Bill, with a transmission ratio of 1: 1, ensure the color collecting rubbers A, B 'and color template AI, BI , A IK ΒΠ and ΑΠΙ, ΒΠΙ can fully contact the two gravure plates A and B on the plate cylinder 3 according to the predetermined printing process requirements, so that the gravure plates A and B are respectively assigned to the corresponding positions specified. Get the specified ink. The inking range and position accuracy are determined by the color mold contour and the positioning accuracy of the color template on the color mold cylinder.

At the same time, the machine's ink supply system is set for each color mode roller with two channels of ink supply (a total of six channels of ink supply), and two color template AI, · ΒΙ, ΑΙ ΒΠ and ΑΙΠ, ΒΙΠ on each color mode roller. Which ink supply system ink is obtained is determined by the control of a cam clutch mechanism.

In order to realize double-sided simultaneous printing, the present invention adopts a dual-path ink supply system. Through the cam control mechanism, the plate transfer rollers I, 1, II, II, III, III, and color templates AI, BI, A are selected. IK BII and A III, Bill's separation and combination, realize the corresponding ink supply for the A and B engraved gravure on the printing plate cylinder, to ensure the same color, different color, and partial same color, Different colors to ink.

The printing process and equipment of the present invention realize the simultaneous printing of double-sided engraving gravure, and the printed matter printed by this process and equipment has one side of the gravure printing while retaining all the characteristics of traditional carved gravure. The hand feel is stronger than the well-known secondary gravure prints. On the other side of the print, the pattern with better line accuracy than wet offset printing and close to the effect of gravure can be obtained. The patterns on the printed products produced by the above processes and equipment correspond to the normal mirror and normal identification, which improves the anti-counterfeiting ability of the printed materials (such as banknotes), facilitates the public to identify the authenticity of printed products, and has obvious social benefits.

1! Because the front and back plates A and B of the present invention are both installed on the same printing plate cylinder 3, the mechanical system error in the known technology is avoided, and the accuracy of the gravure pattern printing is improved, and the printing error is less than ± 0. 10mm, which is much higher than the accuracy of offset printing.

• Example 2

As shown in Figure 2, in this embodiment, the plate cylinder 3 may be provided with four plate loading areas I ,.

II, III, and IV are respectively equipped with four printing plates ABA ₂ and B ₂ , wherein person ₂ is the same type of gravure printing plate, and BB ₂ is another type of the same gravure printing plate. For convenience of explanation, set Α ₂ is a front gravure plate, the tube is called A ₂ plate, 8 ₂ is a back gravure plate, abbreviation, B ₂ plate. The transfer / embossing cylinder 2 may be provided with five transfer / embossing areas I ,, II, III, IV, and V which are matched with the printing plate cylinder, which are respectively equipped with five transfers. Plates a ,, b ,, c ,, d ,, e ,. The plate cylinder 3 adopts a ratio of 4: 5 to the diameter and number of plates of the transfer / imprint cylinder V, and its transmission ratio is 5: 4, thereby ensuring the plates A, A ₂ on the plate cylinder 3, 8 ₂ can be respectively overlapped with the five printing plates 2, a ,, b ,, c ,, d, and e on the transfer / imprinting cylinder in the embossing area. The sheet feed mechanism (not shown in the figure) in front of the transfer cylinder 1 enables the substrates to be transferred to the transfer / imprint cylinder V through the transfer cylinder 1 at intervals. In this way, when I ,, or Π ,, or ΙΠ ,, or IV ,, or V on the transfer / imprint cylinder 2, there are no substrates on the five plate areas and it is in contact with the BB plate _{2 of the} plate cylinder 3, At the time, the BB ₂ plate will transfer its inked and plate-printed pattern to the surface of each plate of a, b, c, d, e 'of the transfer / imprinting cylinder to make the transfer Imprint / imprint cylinder 2 with the function of a plate cylinder (carrying a printed pattern). When the substrate enters the embossing area with the transfer / imprint cylinder 2, the plate cylinder 3 transfers the pattern on its A ₂ side to the front side of the substrate (completes the typical direct gravure), The embossing / imprinting cylinder 2 also transfers the BB _2- sided pattern thereon to the back surface of the substrate (completes indirect gravure printing), thereby realizing one-time, two-side simultaneous printing of gravure printing.

The contents of each vertical line in Table 2 indicate the corresponding conditions of the printing plate cylinder 3 'and the transfer / imprint cylinder 2 during printing. Table 2 shows the plate cylinder 3, and the transfer / imprint cylinder 2 in turn, after completing a complete printing cycle, that is: the transfer / imprint cylinder 1 rotates 4, and at the same time, the plate cylinder 3 rotates All correspondence status at 5 weeks. The positions indicated by the arrows on the table indicate the corresponding conditions of the plate cylinder 3 and the transfer / imprint cylinder 2 during printing (a certain layout of the transfer / imprint cylinder V has paper (substrate)). The trailing end of the arrow bar indicates forward tracing, that is, when printing (the vertical line pointed by the arrow), whether there is a pattern on the transfer plate on the back of the paper and which plate provided the pattern.

It can be seen from the situation reflected in Figure 2 and Table 2: Whenever there is paper, its front side always corresponds exactly. A front side A1 or A2 is attached. Tracing back to the surface of the transfer / imprint cylinder 1 on the back of the paper at this time, there is always a pattern transferred to it by the back plate B1 or B2. This allows prints to be printed on both the front and back of the product at one time. The specific situation corresponding to the printing plate is the same as that of the first embodiment.

From the analysis described above, it can be confirmed that the diameter and plate number of the plate cylinder 3 and the transfer / imprint cylinder 2 adopt a ratio of 4: 5, and its transmission ratio is 5: 4. 'The back is printed at the same time. In the same way, the same technical effect can be achieved by adopting the diameter and plate number of the plate cylinder and the transfer / imprint cylinder as adjacent odd-odd ratios.

In the embodiment, the ink supply method of the ink supply system may be the same as that in Embodiment 1. A double-plate and dual-path ink supply is adopted, that is, a color collecting and transferring roller 5 and three color die rollers 6 are provided. The color model rollers are supplied by two channels (a total of six and six channels). Each color model roller is provided with two color template AI, BI, Α ΙΙ, Β Π and AIII, Bill. Which one of the color template is obtained? The ink of the ink system is determined by the control of a cam clutch mechanism. Since A ₂ set on the plate cylinder 3 'is the same type of gravure plate,

B ₂ is another identical gravure plate. Therefore, when the ink supply system uses the method of 2: 2: 2 (number of color collection plates: number of color stencils: number of ink supply mechanisms) to supply ink to the plate cylinder, the The color transfer drum 5, the color mold roller 6 and the plate cylinder 3 have a diameter ratio of 1: 1: 2 and a transmission ratio of 2: 2: 1, so as to ensure that AA ₂ and BB on the plate cylinder 3 ₂ Engraving gravure corresponds to ink supply.

When the diameter of the plate cylinder 3 and the transfer / imprint cylinder 2 and the number of plates are 4: 5, and its transmission ratio is 5: 4, its ink supply system can also adopt 4: 4. : 2 (the number of color plates: the number of color plates: the number of ink supply mechanisms) of ink supply, that is, one set of four color plate collection rollers and three four plate color plate rollers, each color plate roller has Two-channel ink supply mechanism (a total of six-channel ink supply mechanisms), and each of the color collection and transfer cylinders and the color mold cylinders are respectively provided with two types of four blocks and plate cylinders 3 and 2 Set the color collecting rubber and color stencil corresponding to the printing plates A ₂ and B 8 ₂ . When the ink supply system supplies ink to the plate cylinder in a 4: 4: 2 manner, the diameter ratio of the color collecting cylinder, the color mold cylinder and the plate cylinder is 1: 1, and the transmission ratio thereof is 1: 1. : 1, so as to ensure that the AA ₂ and BB ₂ engraving 1HJ plates on the plate cylinder 3, respectively, correspond to the ink supply.

The above ink supply system can also use 4: 2: 2 (the number of color collection plates: the number of color stencils: the number of ink supply mechanisms). The method of ink supply, that is, a four-color collection roller and three two-page Color mold rollers, each color mold roller is supplied by two ink supply mechanisms (a total of six ink supply), four color collector rollers are provided corresponding to the printing plate rollers 3 and the printing plates AA ₂ and BB ₂ Collect color rubber, and set two different color stencils on the color stencil roller. When the number of color collection plates: number of color plates: number of ink supply mechanisms is 4: 2: 2 and the ink is supplied to the plate cylinder, the diameter ratio of the color collection cylinder and the color cylinder to the plate cylinder is 2: 1: 2, its transmission ratio is 1: 2: 1: 1, so as to ensure that the AA ₂ and BB ₂ engraved gravure on the plate cylinder 3, respectively, correspond to the ink supply. '-In this embodiment, since the number of printing plates is increased, the printing efficiency can be further improved. The state of use of the device, the production process, the structure of the printed product, and the beneficial effects produced in this embodiment are the same as those in Embodiment 1, and are not repeated here.

Back Positive Transfer / Press

No Yes No Yes No Yes No No Yes No No Yes No No Yes No No Yes No No Yes No

2, layout

e 'a' b 'C' d 'e' a, b 'c, d' e, a 'b. c' d, e 'a' b 'c, d, e' A

Frighter IV I II m IV I II m IV I II ffl IV I II in IV I II m IV I 3 'layout

B2 A1 B1 A2 B2 A1 B1 A2 B2 A1 B1 A2 B2 Al Bl A2 B2 Al Bl A2 B2 A m

Claims

Claim

1. An intaglio printed matter, characterized in that the intaglio printed matter is an intaglio printed matter formed on both the front and the back, and at least one side of the intaglio printed matter has an uneven pattern.

2. The intaglio printed matter according to claim 1, characterized in that: the backprint pattern printed on the front and back sides of the printed product can be mirror-printed, partially or fully printed, same-colored or different-colored printed, Overprinting on both sides, complementary printing.

3. The intaglio printed matter according to claim 1, wherein the pattern printed on the front and back sides of the one-time printed product can have more than one color.

4. An apparatus for manufacturing an intaglio printed matter according to claim 1, characterized in that: the printing apparatus comprises:

A paper control unit comprising a paper transfer cylinder and a paper discharge cylinder located on both sides of a transfer / imprint cylinder; a printing plate cylinder, which can be simultaneously equipped with an even number of gravure plates of equal numbers on the front and back sides ;

An ink supply system, which is located on one side of the plate cylinder and can supply ink to the plate cylinder;

A platen roller is on the other side of the plate cylinder.

5. The gravure printing apparatus according to claim 4, wherein the ratio of the diameter of the plate cylinder to the transfer / imprint cylinder is equal to the ratio of the number of plates.

6. The gravure printing equipment according to claim 4, characterized in that: two printing plates are arranged on the printing plate cylinder at intervals.

7. The gravure printing equipment according to claim 4, characterized in that: the plate cylinder can be provided with two gravure plates with different patterns or the same pattern, and the transfer / embossing cylinder can be provided with three Block transfer / embossing area that matches the plate cylinder.

8. The gravure printing apparatus according to claim 7, wherein a diameter ratio of the printing plate cylinder to the transfer / imprinting cylinder is 2: 3.

9. The gravure printing equipment according to claim 4, wherein: the ink supply system is provided with There is a color collecting cylinder located on one side of the printing plate cylinder and in rolling contact therewith. The peripheral side of the color collecting cylinder is provided with more than one color model cylinder in rolling contact with the color collecting cylinder, and more than one plate transfer roller is arranged. Next to the color mold roller, the color mold roller can receive the ink transferred by the plate transfer roller.

10. The gravure printing device according to claim 9, wherein the color collecting drum is provided with an even number of color collecting rubbers, and the color die cylinder has an even number of color stencils.

11. The gravure printing apparatus according to claim 9, wherein the color die cylinder can be provided with two plate-type transfer rollers for supplying ink to the color mold cylinder.

12. The gravure printing apparatus according to claim 11, wherein: the diameter ratio of the color collecting cylinder, the color mold cylinder and the printing plate cylinder is equal to the number of plates set thereon.

13. The gravure printing equipment according to claim 11, wherein the color collecting cylinder is provided with an even number of color collecting rubbers, and the color mold cylinder has an even number of color stencils, the number of which can be the same as the number of The number of gravure plates is equal or different.

14. The gravure printing device according to claim 11, wherein: the color die cylinder is provided with an even number of plates, and the number of the color cylinders can be equal to or different from the number of gravure plates provided on the plate cylinder.

15. The gravure printing device according to claim 11, characterized in that: the number of color collecting rubbers and color plates provided on the color collecting cylinder and the color mold cylinder are equal to or different from the number of gravure plates provided on the printing plate. .

16. The gravure printing device according to claim 4, wherein a sheet feeding device is provided at the front of the paper transfer cylinder.

17. The gravure printing apparatus according to claim 4, characterized in that: the transfer plate provided on the transfer / imprinting cylinder is coated or adhered on a metal sheet and has a performance suitable for transfer printing and embossing. s material. -

18. The gravure printing device according to claim 17, wherein the flexible material provided on the transfer plate may be nylon, PVC, rubber, or plastic.

19. The gravure printing apparatus according to claim 17, wherein the metal sheet is a metal sheet of 0.30mm-0.50.

20. The gravure printing device according to claim 17 or 18, wherein: the flexible material 60mm。 Coating thickness of the material is 0. 30mm-0. 60mm.

21. The gravure printing equipment according to claim 17 or 18, wherein the hardness of the transfer plate is 80-98 degrees Shore.

22. A method for manufacturing intaglio printing according to claim 1, characterized in that: the method comprises (a) inputting the substrate at intervals; (b) the ratio of the number of printing plates installed is even-odd ratio Printing plate. Roller and transfer / imprinting roller roll embossing; (c) Output the finished product of double-sided printing at one time.

23. The gravure printing method according to claim 22, wherein an even number of gravure plates are provided on the printing plate cylinder, and an odd number of printing plates are provided on the transfer / imprint cylinder.

24. The gravure printing method according to claim 22 or 23, characterized in that gravure printing plates having equal numbers of front and back surfaces of the substrate and the same or different patterns are arranged on the printing plate cylinder at intervals.

25. The gravure printing method according to claim 11, characterized in that: the transmission ratio of the printing plate cylinder to the transfer / imprint cylinder is equal to the number of printing plate blocks provided on the transfer / imprint cylinder and the plate cylinder Set the ratio of the number of gravure blocks.

26. The gravure printing method according to claim 22, wherein the method further comprises an ink supply system having a color collecting cylinder, a color mold cylinder, and a plate transfer roller.

27. The gravure printing method according to claim 26, characterized in that: an even number of color collecting rubbers and color stencils are respectively installed on the color collecting cylinder and the color printing cylinder, and are fed by two-way plate transfer rollers. Color die rollers supply ink.

28. The gravure printing method according to claim 26, wherein the diameter ratio of the color collecting cylinder, the color mold cylinder and the printing plate cylinder is equal to the number of plates set thereon, and its transmission ratio is proportional to its diameter ratio. Inversely.

29. A method for manufacturing intaglio printing according to claim 1, characterized in that the method comprises the following steps:

a. The first and second gravure plates with a pattern on the front and back of the substrate are spaced apart from each other on the printing plate cylinder where an even number of gravure plates can be set, and the transfer / pressing is carried out by rolling and pressing thereon. The installation of the printing drum Several transfer plates;

b. The ink supply system supplies ink to the plate cylinder;

c. After the printing plate cylinder receives ink, it is wiped by a plate cleaning device and enters the embossing area during rotation;

d. The sheet feed mechanism feeds the substrate to the transfer / imprint cylinder at intervals.

30. The gravure printing method according to claim 29, wherein in the step a, the transmission ratio of the printing plate cylinder to the transfer / imprint cylinder is equal to the number of printing plate blocks provided on the transfer / imprint cylinder. Ratio to the number of gravure plates set on the plate cylinder.

31. The gravure printing method according to claim 29, characterized in that: when there is no substrate in the embossing area, the first gravure printing plate and the second gravure printing plate provided on the printing plate cylinder are in the process of rotating the cylinder It can be overlapped with each transfer plate on the transfer / imprint cylinder.

32. The gravure printing method according to claim 29, characterized in that: when a substrate passes through the embossing area, the printing plate cylinder and the transfer / imprinting cylinder print the front and back patterns at one time during the rolling On the front and back sides of the substrate, the substrate can be printed on both sides at the same time.

33. The gravure printing method according to claim 29, characterized in that: two gravure printing plates can be set on the printing plate cylinder of step a, each of which is a concave with a pattern on the front and back of the substrate. The printing plate and the second gravure plate are provided with three transfer plates on the transfer / embossing cylinder which is rolled and pressed together; one of the gravure plates provided on the printing plate cylinder can be separately connected with the transfer plate. The three printing plates on the impression cylinder overlap each other correspondingly in the impression area.

34. The gravure printing method according to claim 33, wherein the diameter ratio of the printing plate cylinder to the transfer / imprinting cylinder is equal to the ratio of the number of printing plate blocks, which is 2: 3.

35. The gravure printing method according to claim 33, wherein the linear speeds of the plate cylinder and the transfer / imprint cylinder are equal.

36. The gravure printing method according to claim 33, wherein: one of the printing plates provided on the transfer / embossing cylinder corresponds to one of the gravure plates provided on the printing plate cylinder, and there is no substrate. When it is in contact with the plate cylinder, the gravure plate on the plate cylinder transfers the pattern that has been inked and wiped to the transfer plate of the transfer / imprint cylinder, so that it has a transfer function. When the substrate is transferred / pressed When the platen enters the embossing area, while the plate cylinder transfers the pattern of another gravure plate provided thereon to the side of the substrate, the transfer plate of the transfer / imprint cylinder transfers the pattern on it Go to the other side of the substrate and finish printing both sides of the substrate.

37. The gravure printing method according to claim 29, wherein: the ink supply system in step b comprises a color collecting roller, a color model roller, and a reverse ink transfer roller, wherein the color collecting roller, the color An even number of color-collecting rubbers and color stencils are respectively installed on the die cylinder, and the two die cylinders are used to supply ink to the color die cylinder.

38. The gravure printing method according to claim 37, characterized in that: the diameter ratio of the color collecting cylinder, the color mold cylinder and the printing plate cylinder is equal to the number of plates set thereon, and the linear speed of rotation is equal.

39. The method of intaglio printing according to claim 37, characterized in that: during the printing process, the color collecting cylinder provided with an even number of ink-supply rubbers and the color printing cylinder provided with an even number of color stencils will be transmitted. Ink-correspondingly passed to the even gravure plate set on the printing plate.

40. The method of gravure printing according to claim 37, wherein the two master cylinders for supplying ink to the color die cylinder are controlled by a cam control mechanism to separate and combine the two with the color die cylinder. In the state, the first and second intaglio printing plates on the printing plate cylinder are respectively supplied with ink.