WO2013091246A1

WO2013091246A1 - Method and device for ink transfer and feed, and printing apparatus having the device

Info

Publication number: WO2013091246A1
Application number: PCT/CN2011/084559
Authority: WO
Inventors: 毕明; 屈明生; 李乐平; 朱彤波; 李方见; 李彦平; 王川; 董学良; 黄玉珍
Original assignee: 中国人民银行印制科学技术研究所; 中国印钞造币总公司
Priority date: 2011-12-23
Filing date: 2011-12-23
Publication date: 2013-06-27
Also published as: DE112011106012T5; CN103282206B; GB201411527D0; CH706793B1; GB2512769B; JP5828965B2; AT514850A5; CH706793B8; GB2512769A; JP2014533615A; AT514850B1; CN103282206A

Abstract

Disclosed are a method and device for ink transfer and feed, and a printing apparatus comprising the device. The device for ink transfer and feed comprises: at least one set of ink feed mechanisms, each set comprising at least an ink supply device, a colour mould roller and an ink transfer roller; the ink transfer roller is connected to a plate cylinder; the ink feed mechanism and the plate cylinder are driven by first and second driving systems, respectively. During a stipulated period, the plate cylinder rotates at a constant speed, and the ink transfer roller can rotate at a variable speed with respect to the plate cylinder, such that the ink transfer roller is offset from the ink transfer position of the plate cylinder by a set spacing, and the offset spacing can be adjusted according to the web requirements of the product to be printed, without the need to exchange the colour mould roller, ink transfer roller and plate cylinder, etc. Hence, the present invention can ensure sufficient ink supply from the ink feed mechanism to the paper to be printed and meet the requirements for printing various products very well, greatly improving the printing quality and productive efficiency.

Description

Ink transfer method, device and printing device therewith

The present invention relates to an ink transfer method and apparatus for graphic printing and a printing apparatus having the same. Background technique

In order to ensure the normal and orderly social and economic activities, anti-counterfeiting printing is used in the printing process of securities such as banknotes, securities and bills.

In order to improve the anti-counterfeiting level of the securities, people usually print two or more colors on the securities. For the continuous printing of the graphic printing along the circumference of the printing plate, the different color areas rotate in the same direction on the printing plate cylinder. The boundary is demarcated, so the ink supply must be fixed for different color areas to ensure the accuracy of the boundary.

At present, the fixed-point ink supply method is such that the diameter of the plate cylinder is an integral multiple of the diameter of the transfer roller, thereby ensuring that every point on the surface of the plate cylinder and a certain surface of the transfer roller are always in the process of rotating the ink transfer. One-to-one correspondence. Although the fixed-point ink supply method is easy to implement, since a certain point on the plate cylinder is always supplied by a fixed point on the surface of the transfer roller, some areas on the surface of the plate cylinder during the printing process Insufficient ink supply will inevitably occur, which may directly affect the quality of the product and the anti-counterfeiting performance of the securities, and even produce waste.

In order to avoid the phenomenon that a certain area of the surface of the plate cylinder which is easy to occur in the above-mentioned known technique may be insufficiently supplied with ink, the inventor of the present invention considers that the transfer roller can be transferred once during the process of transferring the ink to the plate cylinder by the transfer roller. The ink undergoes a relative positional shift. A "dislocation ink transfer number wiring printing device" is disclosed in Chinese Patent No. 200410050147. The misaligned ink number wiring printing device comprises a number printing unit, the number printing unit comprises a number roller, an impression cylinder and two sets of inking systems, and each group of inking systems comprises an ink supply device, a color roller, and an ink transfer roller. The diameter of the color roller is matched with the diameter of the ink transfer roller. The ink transfer roller in the two ink systems is the number roller, and the diameter ratio of the number roller to the ink transfer roller is a non-integer. After making the number roller diameter and the diameter of the transfer roller into a non-integral multiple relationship, during the working process, the number roller rotates J times and the transfer roller rotates P circle to complete an ink transfer cycle, so that in each ink transfer cycle, the number roller The same color area of each number is transferred J times by the J ink storage areas on the corresponding transfer rollers, so that each number can be fully supplied with ink, so as to eliminate the defect of insufficient ink quantity and ensure the printing quality.

The misaligned ink supply number wiring printing device designs the number roller diameter as a non-integer multiple of the diameter of the ink transfer roller, so that although the purpose of better misalignment ink transmission is achieved, the diameters of the ink transfer roller, the color roller and the number roller are Must be limited by the size of the printed product. This known construction requires that the circumference of the outer surface of the transfer roller must be a common divisor of the width of the banknote Several times, otherwise it is impossible to accurately misplace the ink. Therefore, in the known structure, when the print is changed, that is, the size and the position of the print are changed, since the misalignment of the misaligned ink changes, the transfer roller, the color roller, and the number must be replaced. The entire set of rollers (print plate) can meet the requirements of misaligned ink transfer. The known structure is complicated, the scope of application is limited, and the operating cost is high in actual production, and it takes a lot of time to replace the entire set of rollers, which also leads to an increase in production cost. Summary of the invention

It is an object of the present invention to provide an ink transfer method, apparatus and printing apparatus comprising the same.

To this end, the present invention provides an ink transfer inking method in which the inking mechanism and the plate cylinder are respectively driven by two independent first drive systems and a second drive system, wherein each set of inking units is at least Including an ink supply device, a color roller and an ink transfer roller, the ink transfer roller is connected to a plate cylinder; the plate cylinder rotates at a constant speed within a predetermined time, and the ink transfer roller can be opposite to the The plate cylinder performs a shifting motion to shift a position of the ink transfer roller relative to the ink transfer position of the plate cylinder by a predetermined distance.

Wherein, when the color roller is transferred to the ink transfer roller, an ink storage region corresponding to the size and spacing of each color module group on the color roller is formed on the ink transfer roller, and each ink storage region is The ink cartridges of the color module in the respective color module groups are composed of ink storage blocks having the same size and spacing; and the ink storage region on the ink transfer roller corresponds to the graphic region disposed on the printing plate cylinder.

Further, when the plate cylinder is rotated to its working position opposite to the transfer roller, the color roller and the transfer roller driven by the first drive system and the print driven by the second drive system The plate cylinder rotates at the same rotational speed; the first drive system drives the color roller and the transfer roller to be larger or smaller than when the plate cylinder is rotated to its inoperative position opposite to the transfer roller Rotating the rotation speed of the printing plate cylinder, so that the same color area of each graphic area in the working position can be made by different ink storage blocks of the same ink storage area on the ink transfer roller or every revolution of the printing plate cylinder Ink transfer is performed by different ink reservoirs on the transfer roller.

Further, the predetermined pitch of the transfer roller relative to the ink transfer position of the plate cylinder is an integral multiple of the distance between two adjacent ink reservoirs in the same ink reservoir.

The predetermined spacing of the ink transfer roller relative to the ink transfer position of the plate cylinder is 1 to m-1 times the distance between two adjacent ink reservoirs in the same ink storage region, wherein m is the number of ink reservoirs in the same ink reservoir.

The invention also provides an ink delivery inking device, comprising: at least one set of inking units, each group of inking units comprising at least an ink supply device, a color model roller and an ink transfer roller; the ink transfer roller and a printing plate The rollers are connected; the inking mechanism and the plate cylinder are driven by the first and second driving systems, respectively. Further, the present invention provides a printing apparatus having the above-described ink delivery inking apparatus.

The features and advantages of the present invention over the prior art are:

Since the inking mechanism and the plate cylinder are respectively driven by two different independent driving systems, the plate cylinder rotates at a constant speed for a certain period of time, and the inking mechanism performs a variable speed movement with respect to the plate cylinder according to a certain rule. The ink transfer mechanism is shifted by a certain interval with respect to the ink transfer position of the printing plate cylinder in each movement cycle, and the size of the ink transfer mechanism misalignment pitch can be adjusted according to the format requirement of the printed product. , can ensure that the inking mechanism fully supplies ink to the printing plate and meets the printing requirements of different printing products. When replacing different prints, the invention only needs to replace the color module group of the outer surface of each color wheel, and simultaneously adjust the control system of the drive system of the ink feed mechanism, thereby realizing the change of the misaligned ink transfer pitch without changing the color. The mold roll, the transfer roller, the plate cylinder, and the like, therefore, the present invention can greatly save time and production cost, and improve the production efficiency of the printing apparatus. DRAWINGS

The following drawings are only intended to illustrate and explain the present invention, and do not limit the scope of the invention. 1 is a schematic structural view of a driving portion of an ink delivery inking device of the present invention;

2 is a schematic structural view of the ink conveying and conveying device of the present invention before the misalignment adjustment;

3 is a schematic structural view of the ink transfer inking device of the present invention after misalignment adjustment;

Figure 4 is a developed view of the outer circumferential surface of the color wheel of the present invention, showing the position of the color module group disposed thereon and the positional relationship between the color modules;

Figure 5 is a schematic structural view of another embodiment of the ink transfer inking apparatus of the present invention;

Figure 6 is a schematic view showing the structure of a printing unit in a printing apparatus having the inking unit of the present invention; and Figure 7 is a schematic view showing the structure of a coloring roll in the inking unit of the present invention. detailed description

An ink delivery inking device according to the present invention comprises: at least one set of inking units, each group of inking units comprising at least an ink supply device, a color model roller and an ink transfer roller; the ink transfer roller and a plate cylinder Connected; the inking mechanism and the plate cylinder are driven by the first and second drive systems, respectively.

Further, the color roller and the ink transfer roller have the same diameter or an integral multiple of each other.

Further, the color roller has a central axis and at least one color wheel disposed thereon, and at least one color module group is disposed on an outer circumferential surface of each color wheel.

Each of the color module groups is composed of at least two color modules, and the shapes of the color modules are between each other The spacing is the same.

Further, after the color roller is transferred to the ink transfer roller, an ink storage region corresponding to the size and spacing of each color module group on the color roller is formed on the ink transfer roller, and each ink storage region is The ink cartridges of the same color module in the color module group have the same size and spacing.

Further, an ink storage area on the transfer roller corresponds to a graphic area disposed on the plate cylinder.

The ink transfer inking method proposed by the present invention is to drive the inking mechanism and the plate cylinder respectively by two independent driving systems, wherein each group of inking units includes at least an ink supply device, a color roller and an ink transfer roller. The transfer roller is connected to a plate cylinder; the plate cylinder rotates at a constant speed within a predetermined time, and the color roller and the transfer roller can perform a shifting movement with respect to the plate cylinder. The color roller and the ink transfer roller are shifted by a predetermined interval with respect to the ink transfer position of the plate cylinder.

A feasible solution is to drive the color roller and the transfer roller by the first drive system and the second drive system when the plate cylinder is rotated to its working position opposite to the transfer roller The plate cylinder rotates at the same rotational speed; the first drive system drives the color roller and the transfer roller to be larger or smaller than when the plate cylinder is rotated to its non-working position opposite the transfer roller The rotation speed of the plate cylinder is rotated. Each revolution of the plate cylinder, the same color zone of each graphic area in the working position can be differently stored by the different ink storage blocks of the same ink storage zone on the transfer roller or by the transfer roller. The ink area is inked.

Specifically, the predetermined pitch of the shift is an integral multiple of the distance between two adjacent ink reservoirs in the same ink reservoir on the transfer roller, that is, may be 1 to (m-1) The integer between, m is the number of ink reservoirs in the same ink reservoir.

The invention adopts two independent driving systems to respectively drive the inking mechanism and the plate cylinder, and in the working area, the color roller and the ink transfer roller can be moved at the same speed as the plate cylinder, and when the plate cylinder is rotated to the non-working area The color mold roller and the ink transfer roller can be rotated at a rotation speed greater than or less than the rotation speed of the plate cylinder, so that the ink transfer roller is displaced by a predetermined interval with respect to the plate cylinder to ensure the printing of the graphic on the plate cylinder. The same color zone is transferred by different ink storage blocks of the same ink storage zone on the corresponding ink transfer roller or by different ink storage zones on the corresponding ink transfer roller, so that the color regions of the printed image can be fully supplied with ink. . When the printed product variety is changed, the spacing between the image areas on the plate cylinder changes, the spacing of the ink storage areas on the transfer roller and the spacing of the misaligned ink transfer change, and the present invention only needs to be replaced by the present invention. The color module group on the outer surface of the color wheel and simultaneously change the drive control system to adjust the color module group on the color wheel and the spacing of the misaligned ink without replacing the color roller, the transfer roller and the plate cylinder. It can greatly improve production efficiency, reduce production costs, and greatly improve the application range of products using this technology equipment.

The printing apparatus proposed by the present invention comprises the above-mentioned ink conveying and inking unit, wherein the plate cylinder and the impression cylinder are Two drive system drivers.

In order to more clearly understand the technical features, objects and effects of the present invention, the specific embodiments, structures, features and functions of the ink delivery inking apparatus, method and apparatus of the present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments. The description is as follows. In addition, the technical means and functions of the present invention for achieving the intended purpose can be more specifically understood by the description of the embodiments, but the drawings are only for reference and explanation, and are not intended to limit the present invention. .

1 is a schematic structural view of a driving portion of an ink conveying and inking unit according to the present invention; FIG. 2 is a schematic structural view of the ink conveying and inking unit of the present invention before misalignment adjustment; FIG. 3 is a structure after dislocation adjustment of the ink conveying and inking unit of the present invention. 4 is a developed view of the outer circumferential surface of the color wheel of the present invention, showing the position of the color module group disposed thereon and the positional relationship between the color modules; FIG. 5 is another embodiment of the ink delivery device of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 6 is a schematic view showing the structure of a printing unit in a printing apparatus having the ink delivery inking apparatus of the present invention. Figure 7 is a schematic view showing the structure of a color roller in the ink transfer device of the present invention.

As shown, the ink delivery inking apparatus of the present invention comprises: at least one set of inking units 10, each group of inking units comprising at least an ink supply unit 13, a color mold roller 12 and an ink transfer roller 11; The roller 11 is coupled to a plate cylinder 30; the inking mechanism 10 and the plate cylinder 30 are driven by the first and second drive systems, respectively.

Wherein, the color roller 12 and the ink transfer roller 11 have the same diameter or an integral multiple of each other. In the embodiment, as shown in FIG. 1, 2, 3, 5, and 6, only the color roller is used. The case where the diameter of 12 and the transfer roller 11 are equal is described as an example.

Wherein, the color roller 12 has a central axis 12", and at least one color wheel 12' disposed thereon, and at least one color module group 120 is disposed on the outer surface of the color wheel 12', each color The module group is composed of at least two color modules, and the shape, the number, and the spacing between the color module groups 120 disposed on the outer circumferential surface of the color wheel 12' are the same, and the shapes of the color modules in the same color module group are The spacing between each other is the same.

The manner in which the color wheel 12' is coupled to the central axis of the color roller 12 is a commonly known technique and will not be described herein.

In the present embodiment, the diameter ratio of the color roller 12, the transfer roller 11 and the plate cylinder 30 is 1: 1:2, and the outer circumferential surface of the color wheel 12' is schematically shown. There are three color module groups 120, and the three color module groups are denoted by reference numerals 121, 122, and 123, respectively, and each color module group is composed of four color modules a, b, c, and d. At the same time, three graphic areas 300 are arranged in the working area of the plate cylinder 30, which are denoted by reference numerals 301, 302 and 303, respectively, as shown in Fig. 2.

After the color roller 12 is inked by the ink transfer roller 11, three ink storage regions 110 corresponding to the three color module groups 121, 122, 123 on the color roller are formed on the ink transfer roller 11, The three ink storage zones 110 are respectively numbered 111, 112, 113 indicates that each ink storage area 110 is composed of four ink storage blocks a', b', c', and d'. The three image areas 300 on the plate cylinder are in one-to-one correspondence with the three ink storage areas formed on the transfer roller 11, and are composed of four ink storage blocks a', b' in the corresponding ink storage area 110, c ' , d ' is supplied with ink according to a certain regularity.

Further, the surface of the transfer roller 11 is made of an elastic material, and the surface of the color roller 12 is made of a hard material. The elastic material may have a hardness of 30 to 45 degrees Shore, for example, may be a rubber layer or a polyester layer; the hard material may be a nylon plate or a metal plate.

Of course, the inking unit of the present invention is not limited to providing only one set of inking units 10, and FIG. 5 is a schematic view showing the structure of an inking unit that is provided with two sets of inking units 10, and therefore, the inking unit The quantity can be set according to actual needs. The structure and principle of each group of inking units are the same. In this paper, only one set of inking units is taken as an example for description.

A printing apparatus proposed by the present invention includes at least a printing unit as shown in Fig. 6, and wherein the plate cylinder 30 and the impression cylinder 50 are driven to rotate synchronously by the second drive system.

In one embodiment, the inking unit 10 is supplied with ink from a separate set of ink supply units 13, wherein each of the ink supply units 13 may be comprised of an ink fountain, an ink fountain roller, a tandem roller, a fountain roller, and the like. Each set of inking mechanism 10 includes an ink supply mechanism 13, a color roller 12 and an ink transfer roller 11 which are sequentially connected to each other, and the ink supply mechanism 13 transfers the ink through the color roller 12 to the transfer roller 11, and then The transfer roller 11 transfers the ink to the corresponding graphic area 300 on the plate cylinder 30 in contact therewith. The inking mechanism 10 of the present invention is independently driven by the first drive system. Referring to Figure 1, it can be independently driven by the servo motor 40, and the plate cylinder 30 and the impression cylinder 50 are driven by the second drive system, such as It can be driven by another motor (not shown). In the embodiment, the color roller 12 is connected to the first driving system, and the color roller 12 and the ink transfer roller 11 are driven to rotate synchronously by the meshing gear 41, and the color roller 12 is The diameter is equal to the diameter of the transfer roller 11.

Of course, FIG. 1 is only a specific embodiment. The servo motor 40 is not limited to driving the color roller 12, and may directly drive any one of the ink transfer roller, the ink roller and the ink roller, and drive the ink conveying mechanism through the gear transmission. The other rollers rotate in synchronism.

As shown in FIG. 5, when there are two sets of inking mechanisms 10, an alternative is that the color rolleres 12, 22 of the two sets of inking mechanisms can be synchronously driven by a separate driving system 40 and meshed with each other. The gears respectively drive the transfer rollers 11, 21 of the two sets of inking mechanisms 10 to rotate synchronously. Another possible embodiment is that the two sets of inking units 10 are respectively driven by two drive systems, such as two servo motors, and that the two servo motors are kept in synchronous rotation. The control method is a well-known technology, and details are not described herein again.

The working principle of the present invention is: driving the inking mechanism 10 by a first driving system (such as servo motor 40), The inking unit 10 includes at least an ink supply mechanism 13, a color roller 12 and an ink transfer roller 11 which are sequentially connected to each other, and the color roller 12 and the ink transfer roller 11 are synchronously rotated by the servo motor 40. The transfer rollers 11 are respectively connected to a plate cylinder 30, and the plate cylinder 30 and the impression cylinder 50 are driven to rotate synchronously by another drive system (not shown).

In operation, the ink is transferred by the transfer roller 11 of the inking unit 10 to the corresponding plate cylinder 30. During a certain period of time, the plate cylinder 30 rotates at a constant speed, and the inking mechanism 10 performs a shifting motion with respect to the plate cylinder 30 in a certain regularity, so that the inking mechanism 10 is opposed to the plate cylinder 30 in each movement cycle. The ink transfer position is shifted by a certain interval according to a certain rule. Specifically, when the plate cylinder 30 is rotated to its working position (i.e., the position on which the image area 300 is provided) is opposite to the transfer roller 11, as shown in FIG. 2, in the present embodiment, When the graphic areas 301, 302, 303 of the plate cylinder 30 are in contact with the ink storage block a' of the ink storage areas 111, 112, 113 of the transfer roller 11, respectively, the servo motor 40 drives the color roller 12 And the transfer roller 11 rotates in synchronization with the plate cylinder 30 at the same rotational speed. And when the plate cylinder 30 is rotated to its non-working position A (i.e., the position on which the image is not provided) is opposed to the transfer roller 11, that is, at the transfer roller 11 and the plate cylinder 30. Each of the image frames 300 disposed on the first contact is in contact with each other. After the ink transfer is completed, the plate cylinder 30 is rotated until its non-working position A corresponds to the transfer roller 11, the servo motor 40 drives the The color roller 12 and the ink transfer roller 11 are rotated at a rotation speed greater than or less than the plate cylinder 30, thereby rotating the plate cylinder 30 one week to complete an ink transfer cycle, and in the next ink transfer cycle, the printing plate Each of the image areas 300 on the drum 30 is respectively inked by different ink storage blocks of the same ink storage area 110 on the transfer roller 11, as shown in FIG. 3, which is schematically shown with respect to FIG. After the ink transfer roller 11 and the plate cylinder have a corresponding ink transfer, the servo motor 40 completes the shift adjustment, so that the corresponding ink transfer position of the transfer roller 11 and the plate cylinder 30 is misaligned, and the ink storage region 111 is displaced. , 112, 113 ink storage block c ' to the graphic area 301, 30 2, 303 to carry the ink.

More specifically, when the transfer roller 11 is in the working area of the plate cylinder 30, it rotates in synchronization with the plate cylinder 30, and by cooperating with the plate cylinder 30, the respective ink storage regions 110 on the transfer roller 11 are The ink passes to the respective graphic areas 300 provided in the working area of the plate cylinder 30. When the ink transfer roller 11 is in the non-working area A (ie, neutral) of the plate cylinder 30, the rotation speed of the ink transfer roller 11 is different from the rotation speed of the plate cylinder 30, that is, the stepless speed regulation is performed by the servo motor 40. The color roller 12 is positionally displaced at a predetermined pitch. Since the color roller 12 and the ink transfer roller 11 are connected by gears, the diameter ratio is 1:1, so that the ink transfer roller 11 and the color roller 12 are realized. Synchronization is wrong. For example, in the first cycle (see Fig. 2), first, the ink storage block a' in each of the ink storage regions 111, 112, 113 of the transfer roller 11 is a map on the corresponding plate cylinder 30. The text areas 301, 302, and 303 are inked. When entering the non-working area, the transfer roller is driven by the servo motor 40 to perform shifting adjustment, so that in the second working cycle, that is, when the printing plate When the drum 30 is again in the working section, other ink storage blocks other than the ink storage block a' are removed from the respective ink storage regions 111, 112, 113 of the ink transfer roller 11, such as the ink storage block in FIG. c ' is inked for the graphic areas 301, 302, 303 on the corresponding plate cylinder 30.

Fig. 3 is merely an illustration of the fact that the ink storage area on the transfer roller 11 is shifted by three color module intervals with respect to the plate cylinder 30, but is not limited thereto. After the shifting of the color roller and the transfer roller is completed in the non-working area of the plate cylinder, in the next working cycle, the same image area on the plate cylinder 30 is transferred, which may be the same on the transfer roller 11. Any ink storage block other than the ink storage block a' in the ink storage area, as long as the pitch of each shift misalignment is satisfied to be adjacent to two adjacent ink storage blocks in the same ink storage area on the transfer roller An integer multiple of the spacing, which may be an integer between 1 and (x-1), where X is the number of ink reservoirs in the same ink reservoir. Thus, each time the plate cylinder 30 is rotated, the transfer roller 11 can realize the misalignment of the ink once, ensuring that the same graphic area 300 on the plate cylinder 30 is in the same ink storage area 110 on the transfer roller 11 each time. Different ink storage blocks are inked, so that each image area can be fully supplied with ink, which ensures the printing quality of printed graphics on the securities.

For example: the plate cylinder 30 is operated at a speed of 8000 rpm, and when the transfer roller 11 is rotated to the working area of the plate cylinder 30, the inking mechanism 10 is driven by the first drive system to be the same as the plate cylinder 30. Rotating speed; whenever the transfer roller 11 is rotated to the non-working area A of the plate cylinder 30, the inking mechanism 10 is operated at a speed of 6000 rpm per hour driven by the first drive system (servo motor 40); After a duty cycle, the position of the ink transfer roller 11 of the inking unit transferring ink to the plate cylinder is adjusted as shown in Figs. 2 and 3, and is adjusted by the ink storage block a' in the ink storage area 111 to the ink storage area 111. The ink storage block c' transfers ink to the corresponding image area on the plate cylinder 30. Thus, when the ink transfer roller of the inking mechanism rotates n times, the plate cylinder rotates m times. (Of course, in the next motion cycle, the ink transfer roller of the inking mechanism can also be rotated n times while the plate cylinder is rotated. The k-ring is rotated.) It is ensured that each ink-storage block in the same ink-receiving zone 110 on the transfer roller 11 is supplied with ink by a corresponding color module on the color-moulding roller 12, and then to the upper surface of the plate cylinder 30. The ink supply in the text area 300 is such that the ink amount of the graphic area 300 of the plate cylinder 30 is secured, thereby ensuring the printing quality.

Therefore, the present invention overcomes the well-known structure that the diameter ratio of the plate cylinder to the transfer roller is a non-integer number, and the circumference of the outer surface of the transfer roller must be an integral multiple of the common square of the banknote width, otherwise misaligned ink transfer cannot be achieved. defect. It is known that when a product having a different pitch (text area) is used, the entire set of rollers including the color roller, the transfer roller, and the number roller must be replaced.

While the present invention employs the inking mechanism 10 to be driven by the first drive system, for example, the servo motor 40 drives the color roller 12, and the plate cylinder 30 is driven by another drive system, the transfer roller 11 can be flexibly adjusted. Speed, adjust the misalignment spacing according to the spacing B between the color modules in the color module group, so that the same ink storage area on the ink transfer roller 11 After the ink storage block is inked by the color module on the color roller 12 for a plurality of times, the ink is supplied to the graphic area 300 on the plate cylinder 30, thereby ensuring that the image area 300 is sufficiently supplied with ink, thereby improving the printing product. quality. When the print is replaced, that is, the distance between the graphic areas on the plate cylinder 30 is changed, and the size and spacing of the color modules in the color module group of the outer circumferential surface of the color wheel are replaced by the present invention, and the drive control system is modified at the same time. To change the predetermined shifting pitch without replacing the color roller, the transfer roller and the plate cylinder, saving time and saving production cost, and improving the production efficiency of the printing equipment, and meeting the printing of different printing products. Claim.

The plate cylinder 30 in this embodiment is a relief cylinder, but is not limited thereto.

The above description is only illustrative of the specific embodiments of the invention and is not intended to limit the scope of the invention. Any equivalent changes and modifications made by those skilled in the art without departing from the spirit and scope of the invention are intended to be included within the scope of the invention. In addition, it should be noted that the components of the present invention are not limited to the above-mentioned overall application, and the technical features described in the specification of the present invention may be selected according to actual needs, or may be used alone or in combination. Therefore, the present invention Other combinations and specific applications related to the inventive aspects are of course covered.

Claims

Claim

What is claimed is: 1. An ink transfer method, wherein the ink transfer method comprises driving an ink feed mechanism and a plate cylinder by two independent first drive systems and a second drive system, wherein Each set of inking mechanism includes at least an ink supply device, a color roller and an ink transfer roller, and the ink transfer roller is connected to a plate cylinder; the plate cylinder rotates at a constant speed within a predetermined time, and the transfer The ink roller is capable of shifting movement relative to the plate cylinder to shift the ink transfer roller relative to the ink transfer position of the plate cylinder by a predetermined distance.

2. The ink transfer method according to claim 1, wherein at least one color module group is disposed on an outer circumferential surface of the color roller, and each of the color module groups is composed of at least two color modules. Composition, and the shapes of the respective color modules are the same as the spacing between each other.

3. The ink transfer method according to claim 2, wherein, when the color roller is transferred to the transfer roller, a color module group on the transfer roller is formed on the transfer roller. An ink storage area corresponding to the size and the spacing, and each of the ink storage areas is composed of ink storage blocks having the same size and spacing as the color modules of the color module groups; and the ink storage area on the ink transfer roller is The graphic area set on the plate cylinder corresponds.

4. The ink delivery method according to claim 3, wherein said color mode driven by said first drive system is rotated when said plate cylinder is rotated to its working position opposite said transfer roller The roller and the transfer roller rotate at the same rotational speed as the plate cylinder driven by the second drive system; the first drive is rotated when the plate cylinder is rotated to its inoperative position opposite the transfer roller The system drives the color mode roller and the ink transfer roller to rotate at a rotation speed greater than or less than the plate cylinder, so that each time the plate cylinder rotates, the same color region of each graphic area in the working position can be Different ink reservoirs of the same ink reservoir on the transfer roller or ink transfer from different ink reservoirs on the transfer roller.

The method of inking and inking according to claim 3 or 4, wherein the predetermined spacing of the ink transfer roller relative to the ink transfer position of the plate cylinder is the same in the same ink storage region. An integer multiple of the spacing between two adjacent ink reservoirs.

The ink transfer method according to claim 5, wherein the predetermined spacing of the ink transfer roller relative to the ink transfer position of the plate cylinder is two adjacent ones in the same ink storage region. The ink reservoirs are spaced from each other by a factor of 1 to x-1, where X is the number of ink reservoirs in the same ink reservoir.

An ink delivery inking device, comprising: at least one set of inking units, each group of inking units comprising at least an ink supply unit, a color mold roller and an ink transfer roller; The ink transfer roller is coupled to a plate cylinder; the ink feed mechanism and the plate cylinder are driven by the first and second drive systems, respectively.

8. The ink delivery unit according to claim 7, wherein said color roller and said ink transfer roller Equal in diameter or integer multiples of each other.

9. The ink delivery unit according to claim 7 or 8, wherein the color roller is composed of a central axis and at least one color wheel disposed thereon, and the outer circumference of each color wheel At least one color module group is disposed on the surface.

10. The ink delivery unit according to claim 8, wherein each of the color module groups is composed of at least two color modules, and the shapes of the color modules are the same as the spacing between each other.

11. The ink delivery unit according to claim 10, wherein, when the color roller is transferred to the ink transfer roller, a color module group on the ink transfer roller is formed on the ink transfer roller. The ink storage regions corresponding to the size and the spacing, and each of the ink storage regions is composed of ink storage blocks having the same size and spacing as the color modules in the color module groups.

The ink transfer unit according to claim 7 or 8, wherein, when the color roller is transferred to the transfer roller, the color on the transfer roller is formed on the transfer roller. The ink storage area corresponding to the module group size and the spacing, and each of the ink storage areas is composed of ink storage blocks having the same size and spacing as the color modules in the color module groups, and the ink storage area on the ink transfer roller Corresponding to the graphic area set on the plate cylinder.

The ink transfer inking unit according to claim 7, wherein the surface of the transfer roller is made of an elastic material and has a hardness of 30 to 45 degrees Shore; the surface of the color roller is hard. Made of a material.

14. The ink transfer inking unit according to claim 13, wherein the elastic material is a rubber layer or a polyester layer; and the hard material is a nylon plate or a metal plate.

A printing apparatus, characterized in that the printing apparatus comprises the ink delivery inking apparatus according to any one of claims 7 to 13, wherein the inking mechanism is driven by a first driving system, The plate cylinder and the impression cylinder are driven by a second drive system.