CN111823698B

CN111823698B - Offset press

Info

Publication number: CN111823698B
Application number: CN202010842331.5A
Authority: CN
Inventors: 冯杰; 石华银
Original assignee: Guangdong Fungo Printing Technology Co ltd
Current assignee: Guangdong Fungo Printing Technology Co ltd
Priority date: 2020-08-20
Filing date: 2020-08-20
Publication date: 2022-04-15
Anticipated expiration: 2040-08-20
Also published as: CN111823698A

Abstract

The invention relates to the technical field of printing equipment, and particularly discloses an offset press which comprises a rack, a paper feeding mechanism, a plurality of printing mechanisms, a blanking mechanism and a controller, wherein the paper feeding mechanism, the printing mechanisms, the blanking mechanism and the controller are all arranged on the rack; the invention has excellent printing effect, can stop the operation of each component of the printing mechanism step by step according to the stop requirement, ensures that the printing ink which is sent out from the ink supply system in the printing mechanism can be fully transferred to the printing plate roller, avoids the printing ink from being remained in the roller piece of the printing mechanism after the stop, and avoids the solidification of the printing ink from hindering the next printing.

Description

Offset press

Technical Field

The invention relates to the technical field of printing equipment, in particular to an offset press.

Background

Offset printing presses (offset printing presses) are types of lithographic printing presses in which a printed image is printed from a printing plate onto a blanket cylinder and then transferred from the blanket cylinder to a sheet of paper. Offset presses can be divided into sheet-fed offset presses and web-fed offset presses according to different paper feeding modes; the printing color number completed by one-time paper feeding can be divided into single-color, double-color, four-color and multi-color printing machines; the full-paper printing machine can be divided into a small offset press, a six-opening, four-opening, two-opening and full-paper printing machine according to the maximum paper breadth to be printed, and a double-sided printing machine capable of simultaneously finishing two-sided printing by one-time paper feeding is also arranged. The sheet-fed offset press is a lithographic printing press, is used for printing high-grade commercial printed matters and packaging printed matters, and is the mainstream of modern paper printing.

The shutdown process of the offset press in the prior art is generally the shutdown of the whole machine, so that more residual ink is remained in a printing mechanism, the ink can be solidified and accumulated, resources are wasted, the next printing process can be hindered, and the printing quality of a product is influenced.

Disclosure of Invention

In view of the shortcomings of the prior art, the invention aims to provide an offset printing machine which fully utilizes residual ink.

In order to achieve the purpose, the invention adopts the following technical scheme:

an offset press comprises a frame, a paper feeding mechanism, a plurality of printing mechanisms, a blanking mechanism and a controller, wherein the paper feeding mechanism, the plurality of printing mechanisms, the blanking mechanism and the controller are all arranged on the frame, a paper conveying mechanism is arranged between every two adjacent printing mechanisms, each printing mechanism comprises an ink supply system for providing ink, an ink equalizing system for receiving the ink of the ink supply system and transmitting the ink after the ink is equalized, a printing roller for receiving the ink after the ink is equalized, a stamping roller matched with the printing roller for printing and processing, a dampening system for dampening the printing roller and a riding system for adjusting the stamping between the rollers of the ink equalizing system and the stamping between the rollers of the dampening system; after the ink supply system stops supplying ink, the ink equalizing system can continue to perform ink equalizing transfer printing processing under the condition that the riding pressure system releases transmission coordination among the systems.

Further, it includes first equal ink roller set, the equal ink roller set of second, the equal ink roller set of third, the equal ink roller set of fourth, first movable roller, second movable roller, third movable roller, fourth movable roller and pass the ink roller set, first equal ink roller set is connected with ink supply system and first movable roller transmission, the equal ink roller set of second is connected with first movable roller and second movable roller transmission, the equal ink roller set of third is connected with second movable roller, third movable roller, fourth movable roller transmission, pass the ink roller set and be connected with third movable roller, fourth movable roller transmission, the equal ink roller of fourth is connected with second movable roller, third movable roller transmission.

Further, the riding and pressing system comprises a first riding roller, a second riding roller and a transfer printing riding roller group, wherein the first riding roller is used for riding and pressing the first ink distributing roller group, the second riding roller is used for riding and pressing the dampening system, and the transfer printing riding roller group is used for riding and pressing the ink transfer roller group.

Further, the ink transfer roller group includes the equal ink roller of first rendition, the equal ink roller of second rendition, the equal ink roller of third rendition and the equal ink roller of fourth rendition, the rendition straddles roller group including first rendition and roller, second rendition and roller and third rendition and roller, the equal ink roller of first rendition and the equal ink roller of second rendition are connected with the transmission of third movable roller, the equal ink roller of third rendition and the equal ink roller of fourth rendition are connected with the transmission of fourth movable roller, first rendition is ridden and is used for riding pressure the equal ink roller of first rendition, the second rendition is ridden and is used for riding pressure the equal ink roller of second rendition and the equal ink roller of third rendition, the third rendition is ridden and is pressed the fourth rendition is all ridden.

Further, the first transfer riding roller rides and presses the fourth ink equalizing roller.

Furthermore, the first movable roller, the second movable roller, the third movable roller and the fourth movable roller are hollow rollers, and a temperature detection device is arranged in the hollow rollers and circulated with a circulating temperature control liquid.

Further, the ink supply system comprises an ink tank, an ink tank roller connected with the ink tank, and an ink guide roller in transmission connection with the ink tank roller and the ink equalizing system.

Furthermore, the dampening system comprises a water tank, a water tank roller connected with the water tank, a quantity adjusting roller in transmission connection with the water tank roller, a fifth movable roller connected with the quantity adjusting roller and a plate contacting water roller in transmission connection with the fifth movable roller and the plate printing roller, and the riding and pressing system rides and presses the plate contacting water roller.

Furthermore, the adjusting roller is connected with a distance adjusting device for adjusting the printing pressure between the adjusting roller and the fifth moving roller.

Further, the number of the printing mechanisms is four or five.

The invention has the following beneficial effects:

the invention has excellent printing effect, can stop the operation of each component of the printing mechanism step by step according to the stop requirement, ensures that the printing ink sent from the ink supply system in the printing mechanism can be fully transferred to the printing roller to avoid the printing ink remaining in the roller piece of the printing mechanism after the stop, avoids the solidification of the printing ink to hinder the next printing, thereby improving the printing quality and reducing the stop maintenance time.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a printing mechanism;

FIG. 3 is a schematic view of the control connection of the controller to the printing mechanism;

in the figure: 1. a frame; 2. a paper feeding mechanism; 3. a printing mechanism; 4. a blanking mechanism; 5. a controller; 6. A paper conveying mechanism; 31. an ink supply system; 32. an ink homogenizing system; 33. a printing plate roller; 34. a platen roller; 35. a dampening system; 36. a ride pressure system; 311. an ink tank; 312. an ink fountain roller; 313. an ink guide roller; 321. a first ink leveling roller set; 322. a second ink homogenizing roller set; 323. a third ink homogenizing roller set; 324. a fourth ink equalizing roller; 325. A first movable roller; 326. a second movable roller; 327. a third movable roller; 328. a fourth movable roller; 329. an ink transfer roller set; 3210. a fifth ink distributing roller; 3211. a temperature detection device; 351. a water tank; 352. a water trough roller; 353. Adjusting the amount of the roller; 354. a fifth movable roller; 355. a plate contact water roller; 356. a distance adjusting device; 361. a first riding roller; 362. a second riding roller; 363. a transfer riding roller set; 3211. a first ink equalizing roller a; 3212. a first ink equalizing roller b; 3213. a first ink equalizing roller c; 3221. a second ink equalizing roller a; 3222. a second ink equalizing roller b; 3231. a third ink equalizing roller a; 3232. a third ink equalizing roller b; 3233. a third ink equalizing roller c; 3234. a third ink equalizing roller d; 3291. a first transfer ink equalizing roller; 3292. a second transfer ink equalizing roller; 3293. a third transfer ink equalizing roller; 3294. A fourth transfer ink equalizing roller; 3631. a first transfer printing riding roller; 3632. a second transfer roller; 3633. and a third transfer roller.

Detailed Description

The invention will be further described with reference to the accompanying drawings and specific embodiments so as to more clearly understand the technical idea of the invention claimed.

As shown in fig. 1-3, the offset printing machine of the present invention includes a frame 1, a paper feeding mechanism 2, a plurality of printing mechanisms 3, a blanking mechanism 4 and a controller 5, all of which are mounted on the frame 1, wherein a paper feeding mechanism 6 is disposed between adjacent printing mechanisms 3, the printing mechanisms 3 include an ink supply system 31 for supplying ink, an ink equalizing system 32 for receiving the ink supplied by the ink supply system 31, performing an ink equalizing treatment on the ink and transferring the ink to a next station, a printing roller 33 for receiving the ink after the ink equalizing treatment by the ink equalizing system 32, a stamping roller 34 cooperating with the printing roller 33 to perform a printing process, a dampening system 35 for dampening the printing roller 33, and a ride-over system 36 for adjusting the impression between the rollers of the ink equalizing system 32 and the impression between the rollers of the dampening system 35; after the ink supply system 31 stops supplying ink, the ink equalizing system 32 may continue the ink equalizing transfer process with the relief of the ride pressure system 36.

It is worth mentioning that embossing refers to the radial pressure between the rolls.

It should be noted that the ink supply system 31, the ink equalizing system 32, the dampening system 35, and the printing plate roller 33 are all connected to a power system connected to the controller 5, and in the present embodiment, the servo motor is preferred.

The controller of the invention controls the whole machine to operate and process, the paper to be processed is placed in the paper feeding mechanism 2 and sent to the printing mechanism one by the paper feeding mechanism 2 for printing treatment, and the printed paper is collected and stacked by the blanking mechanism 4; in the printing process of the printing mechanism 3, the dampening system 35 performs dampening treatment on the printing plate roller 33, the ink supply system 31 continuously extracts and supplies ink, the ink equalizing system 32 performs multi-stage ink equalizing transfer printing processing after receiving the ink sent by the ink supply system so that the ink reaches a proper thickness and then is transferred onto the printing plate roller 33, the printing plate roller 33 performs dampening treatment and then inking, and finally the printing plate roller 33 performs printing processing on paper by matching with the stamping roller 34; in addition, in the processing process, under the riding and pressing action of the riding and pressing system 36, all parts of the printing mechanism 3 operate in a matching manner, when a worker sends a stop instruction through the controller 5, the ink supply system 31 stops supplying ink, then the riding and pressing system 36 gradually reduces the printing pressure until the transmission matching among all systems is released, and the specific process is that the connection between the ink supply system 31 and the ink equalizing system 32 is cut off firstly, so that the ink equalizing system can continue to operate to equalize the thickness of the existing ink on the ink after the supply of the ink is stopped, then the riding and pressing system delays (the specific time is calculated according to the circumference of the roller set of the ink equalizing system 32 so as to ensure that the ink can be effectively transferred), then the connection between the water adhering system 35 and the ink equalizing system 32 and the printing roller 33 is cut off step by step, and the corresponding power system is stopped.

The present invention can utilize the riding pressure system 36 to adjust the printing pressure of the ink equalizing system 32 to adjust the ink equalizing effect, and at the same time, after the ink supply system 31 stops supplying ink, the ink equalizing system 32 can still continue to operate to transfer the received ink to the printing plate roller 33 for continuous printing, thereby effectively utilizing the remaining ink and reducing the problem that the ink equalizing system 32 accumulates too much ink to hinder the next printing.

It should be noted that the controller 5 of the present invention can record the number of sheets to be printed, so during the printing technology, according to the perimeter value of each roller set, the ink supply system 31 is stopped before printing is finished (the amount of time ahead is calculated by the ratio of the ink transfer stroke between the printing plate roller 33 and the ink supply system 31 to the printing plate roller 33 and the rotation speed of the printing plate roller 33), and it is ensured that the ink on the remaining ink distribution system 32 can complete the processing of a preset number of printed parts.

Preferably, the number of the printing mechanisms 3 is four or five, preferably five in the embodiment, and the printing mechanisms are respectively used for printing black, blue, red, yellow and special colors, wherein the special colors refer to printing effects which cannot be achieved by the former four colors, such as golden colors and silver colors; in another embodiment, four printing mechanisms 3 are used for printing black, blue, red and yellow, respectively.

Preferably, the ink homogenizing system 32 comprises a first ink homogenizing roller group 321, a second ink homogenizing roller group 322, a third ink homogenizing roller group 323, a fourth ink homogenizing roller 324, a first movable roller 325, a second movable roller 326, a third movable roller 327, a fourth movable roller 328 and an ink transfer roller group 329, the first ink homogenizing roller group 321 is in transmission connection with the ink supply system 31 and the first movable roller 325, the second ink homogenizing roller group 322 is in transmission connection with the first movable roller 325 and the second movable roller 326, the third ink homogenizing roller group 323 is in transmission connection with the second movable roller 326, the third movable roller 327 and the fourth movable roller 328, the ink transfer roller group 329 is in transmission connection with the third movable roller 327 and the fourth movable roller 328, the fourth ink homogenizing roller 324 is in transmission connection with the second movable roller 326 and the third movable roller 327, and roller members of the ink transfer roller group 329 are in transmission connection with the form roller group 329.

In the stopping process, the first movable roller 325, the second movable roller 326, the third movable roller 327 and the fourth movable roller 328 stop power supply step by step under the cooperation of the riding and pressing system 36 and under the control instruction of the controller 5, so that the ink equalizing system 32 gradually conveys the residual ink forward and stops step by step after the ink supply system 31 stops supplying ink, the idle running time of the equipment is reduced, and the resource cost is reduced.

In addition, the ink supply system 31, the first ink homogenizing roller set 321, the first movable roller 325, the second ink homogenizing roller set 322 and the second movable roller 326 transmit ink in a single line, so that the ink can be fully conveyed forwards in the early stage, and the problems of ink dispersion and waste are reduced; specifically, the second movable roller 326 rotates counterclockwise, the second movable roller 326 receives ink and then transfers the ink to the fourth movable roller 328 and the third movable roller 327 through the third ink equalizing roller group 323 and the fourth ink equalizing roller 324, respectively, and the third ink equalizing roller group 323 also transfers the ink to the third movable roller 327, specifically, the third movable roller 327 and the fourth movable roller 328 both rotate counterclockwise, and the third movable roller 327 and the fourth movable roller 328 are further transferred to the printing plate roller 33 through the ink transfer roller group 329; the ink is shunted and led out through the second movable roller 326, the third movable roller 327 which is short in transmission stroke away from the printing plate roller 33 is used for receiving the ink of the third ink equalizing roller group 323 and the fourth ink equalizing roller 324, the printing plate roller 33 is guaranteed to receive the ink transferred from the third movable roller 327 immediately after being wetted, the ink amount at the initial inking position of the printing plate roller is guaranteed to be appropriate and sufficient, the residual ink is transferred through the fourth movable roller 328, the defect of the ink layer on the printing plate roller is filled, and the thickness of the ink layer is guaranteed to reach the standard.

It should be mentioned that the first movable roller 325, the second movable roller 326, the third movable roller 327, the fourth movable roller 328 and the ink transfer roller set 329 are all connected with a servo motor connected with the controller 5, and the controller 5 can control the start and stop of the corresponding motors to switch the operation states of the corresponding first movable roller 325, the second movable roller 326, the third movable roller 327, the fourth movable roller 328 and the ink transfer roller set 329.

Preferably, the first ink equalizing roller group 321 comprises a first ink equalizing roller a3211 and a first ink equalizing roller b3212, the first ink equalizing roller a3211 is in transmission connection with the ink guide roller 313 and the first ink equalizing roller b3212, and the first ink equalizing roller b3212 is in transmission connection with the first movable roller 325; after the pressure riding system 36 rides the first ink equalizing roller a3211 and the pressure riding system 36 releases the first ink equalizing roller a3211, the direct separation of the printing pressure between the first ink equalizing roller a3211 and the first ink equalizing roller b3212 is reduced, so as to cut off the transmission relationship between the front and rear components of the first ink equalizing roller set 321, and the first movable roller 325 can continue to operate independently of the ink supply system 31.

Preferably, the second ink equalizing roller set 322 includes a second ink equalizing roller a3221 and a second ink equalizing roller b3222, the second ink equalizing roller set a3221 is drivingly connected with the first moving roller 325 and the second moving roller 326, and the second ink equalizing roller set b3222 is drivingly connected with the second ink equalizing roller set a3221, and is used for cooperating with the first moving roller 325 and the second moving roller 326 to define the position of the second ink equalizing roller set a3221 and make the ink equalizing effect on the second ink equalizing roller set a3221 better, so as to ensure that the second moving roller 326 can receive the ink layer which is even and then dispersedly transmit the ink layer to the third moving roller 327 and the fourth moving roller 328.

Preferably, the third ink-distributing roller group 323 comprises a third ink-distributing roller a3231, a third ink-distributing roller b3232, a third ink-distributing roller c3233 and a third ink-distributing roller d3234, the third ink-distributing roller a3231 is in transmission connection with a second movable roller 326, a third movable roller 327 and a third ink-distributing roller b3232, the third ink-distributing roller b3232 is in transmission connection with a third ink-distributing roller c3233, the third ink-distributing roller c3233 is in transmission connection with a third ink-distributing roller d3234 and a fourth movable roller 328, and the third ink-distributing roller d3234 is used for limiting the position of the third ink-distributing roller c 3233.

Preferably, the riding system 36 includes a first riding roller 361, a second riding roller 362 and a transfer riding roller set 363, the first riding roller 361 is used for riding the first ink distributing roller set 321, the second riding roller 362 is used for riding the dampening system 35, and the transfer riding roller set 363 is used for riding the ink transferring roller set 329; as can be seen from the foregoing, the first riding roller 361 is connected to the first equalizing roller a3211 and is configured to cut off the transmission relationship between the first equalizing roller a3211 and the first equalizing roller b 3212; similarly, the second riding roller 362 can cut off the transmission relationship of the water system 35, and the transfer riding roller set 363 can gradually cut off the ink transmission function of the ink transmission roller set 329; it is worth mentioning that the riding rollers are all connected with a displacement driving mechanism which pushes radially, and can be ball screws or air cylinders, so that the riding rollers can provide proper pressure to the connected roller pieces and even release the connected roller pieces.

Preferably, the ink transfer roller group 329 includes first transfer even ink roller 3291, second transfer even ink roller 3292, third transfer even ink roller 3293 and fourth transfer even ink roller 3294, the transfer roller group 363 includes first transfer roller 3231, second transfer roller 3632 and third transfer roller 3633, first transfer even ink roller 3291 and second transfer even ink roller 3292 are in transmission connection with third movable roller 327, third transfer even ink roller 3293 and fourth transfer even ink roller 3294 are in transmission connection with fourth movable roller 328, first transfer roller 3631 is used for riding pressure first transfer even ink roller 3291, second transfer roller 3632 is used for riding pressure second transfer even ink roller 3292 and third transfer even ink roller 3293, third transfer roller 3633 is used for riding pressure fourth transfer even ink roller 3294.

The first transfer riding roller 3631 can cut off the connection between the first transfer ink-equalizing roller 3291 and the printing plate roller 33 after being released, the second transfer riding roller 3632 can cut off the connection between the second transfer ink-equalizing roller 3292 and the third transfer ink-equalizing roller 3293 and the printing plate roller 33 after being released, the third transfer riding roller 3633 can cut off the connection between the fourth transfer ink-equalizing roller 3294 and the printing plate roller 33 after being released, and in the actual stop, the transfer riding roller set 363 can gradually cut off and stop the machine according to the sequence.

More specifically, the first transfer uniform ink roller 3291, the second transfer uniform ink roller 3292, the third transfer uniform ink roller 3293 and the fourth transfer uniform ink roller 3294 all rotate clockwise, the first transfer uniform ink roller 3291 and the second transfer uniform ink roller 3292 receive the ink transferred from the third moving roller 327 and transfer the ink to the end face of the plate roller 33 with the dampening completed, and the third transfer uniform ink roller 3293 and the fourth transfer uniform ink roller 3294 transfer the ink received from the fourth moving roller 328 to the plate roller 33 for supplementing and equalizing the ink layer, so as to ensure that the ink layer on the plate roller 33 has complete coverage and appropriate thickness.

Preferably, the first transfer ride roller 3631 rides over the fourth fountain roller 324.

Preferably, the ink equalizing system 32 further comprises a fifth ink equalizing roller 3210, wherein the fifth ink equalizing roller 3210 is drivingly connected to the first movable roller 325, and is used for cooperating with the first ink equalizing roller b3212 and the second ink equalizing roller a3221 to define the position 325, and further enhancing the ink equalizing effect of the ink on the first movable roller 325.

In the stopping process, according to the transmission relation, the controller controls the stopping sequence of each part as follows: the first riding roller 361 release stop cuts off the ink supply behavior of the ink supply system 1, the first moving roller 325 stop, the dampening system 35 stop, the first transfer riding roller 3631 release stop, the second transfer riding roller 3632 release stop, the third moving roller 327 release stop, the third transfer riding roller 3633, the fourth moving roller 328 release stop.

Preferably, the first moving roller 325, the second moving roller 326, the third moving roller 327 and the fourth moving roller 328 are hollow rollers, and a temperature detection device 3211 and a circulating temperature control liquid are arranged in the rollers; the temperature detection device 3211 is connected with a circulating heating system connected with a circulating temperature control liquid, and the controller 5 monitors and adjusts the temperature of the moving roller in real time to ensure that the surface of the moving roller has proper temperature and prevent ink from solidifying and adhering.

Preferably, the ink supply system 31 includes an ink tank 311, an ink tank roller 312 connected to the ink tank 311, and an ink guide roller 313 drivingly connected to the ink tank roller 312 and the ink distribution system 32, wherein the ink guide roller 313 transfers ink onto the first ink distribution roller a 3211.

Preferably, the dampening system 35 includes a water tank 351, a water tank roller 352 connected to the water tank 351, a metering roller 353 drivingly connected to the water tank roller 352, a fifth movable roller 354 connected to the metering roller 353, and a plate contacting water roller 355 drivingly connected to the fifth movable roller 354 and the plate roller 33, and the riding system 36 rides on the plate contacting water roller 355.

The dampening system 35 is arranged to perform dampening and then ink coating to form an oil-repellent layer, so that the ink can be fully transferred to paper, and the printing effect is optimized.

More specifically, the second riding roller 362 rides on the fountain roller 355, and when the second riding roller 362 releases the fountain roller 355, the transmission relationship between the printing plate roller 33 and the fifth movable roller 354 is cut off, and the water supply to the printing plate roller 33 is stopped.

The stopping process of the dampening system 35 is that the second riding roller 362 releases the contact plate water roller 355 first, and then the fifth running roller 354 stops running.

Preferably, the adjusting roller 353 is connected with an adjusting device 356 for adjusting the printing pressure between the adjusting roller 353 and the fifth rotating roller 354, the adjusting device is a cylinder or ball screw driving mechanism radially connected with the adjusting roller 353, the adjusting device can change the distance between the adjusting roller 353 and the fifth rotating roller 354 and the water tank roller 352 so as to adjust the thickness of the water layer brought out by the adjusting roller 353, and the thickness of the dampening water layer on the transfer printing plate roller 33 can be adjusted by matching with the second riding roller 362.

Preferably, the ink guide roller 313, the first riding roller 361, the first equalizing roller b3212, the second equalizing roller a3221, the fifth equalizing roller 3210, the fourth equalizing roller 324, the third equalizing roller a3231, the third equalizing roller c3233, the first transfer equalizing roller 3291, the second transfer equalizing roller 3292, the third transfer equalizing roller 3293, the fourth transfer equalizing roller 3294, the fountain roller 355 and the metering roller 353 are all rubber rollers.

Preferably, the ink groove roller 312, the first ink distributing roller a3211, the second ink distributing roller b3222, the first moving roller 325, the second moving roller 326, the third ink distributing roller b3232, the third ink distributing roller d3234, the first transfer riding roller 3631, the second transfer riding roller 3632, the third transfer riding roller 3633 and the second riding roller 362 are all copper rollers.

Preferably, the water trough roll 352 and the fifth moving roll 354 are both chrome rolls.

The invention has excellent printing effect, can stop the operation of each component of the printing mechanism 3 step by step according to the stop requirement, ensures that the ink which is sent out from the ink supply system 1 in the printing mechanism 3 can be fully transferred to the printing plate roller 33 to avoid the ink remaining in the roller member of the printing mechanism 3 after the stop, avoids the solidification of the ink to hinder the next printing, thereby improving the printing quality and reducing the stop maintenance time.

Various other changes and modifications to the above-described embodiments and concepts will become apparent to those skilled in the art from the above description, and all such changes and modifications are intended to be included within the scope of the present invention as defined in the appended claims.

Claims

1. The utility model provides an offset press, includes frame (1), all installs paper feeding mechanism (2), a plurality of printing mechanism (3), unloading mechanism (4) and controller (5) on frame (1), and is adjacent be equipped with between printing mechanism (3) and pass paper mechanism (6), its characterized in that: the printing mechanism (3) comprises an ink supply system (31) for providing ink, an ink equalizing system (32) for receiving the ink of the ink supply system (31) and transmitting the ink after the ink is equalized, a printing roller (33) for receiving the ink after the ink is equalized, a stamping roller (34) matched with the printing roller (33) for printing processing, a dampening system (35) for dampening the printing roller (33), and a ride pressing system (36) for adjusting the press pressing between the rollers of the ink equalizing system (32) and the press pressing between the rollers of the dampening system (35); after the ink supply system (31) stops supplying ink, the ink equalizing system (32) can continue to perform ink equalizing transfer printing processing under the condition that the riding pressure system (36) releases transmission fit among the systems; the ink homogenizing system (32) comprises a first ink homogenizing roller set (321), a second ink homogenizing roller set (322), a third ink homogenizing roller set (323), a fourth ink homogenizing roller (324), a first movable roller (325), a second movable roller (326), a third movable roller (327), a fourth movable roller (328) and an ink transfer roller set (329), the first ink equalizing roller group (321) is in transmission connection with the ink supply system (31) and the first movable roller (325), the second ink homogenizing roller group (322) is in transmission connection with the first movable roller (325) and the second movable roller (326), the third ink roller group (323) is in transmission connection with the second movable roller (326), the third movable roller (327) and the fourth movable roller (328), the ink transfer roller group (329) is in transmission connection with the third movable roller (327) and the fourth movable roller (328), the fourth ink equalizing roller (324) is in transmission connection with the second movable roller (326) and the third movable roller (327); the riding and pressing system (36) comprises a first riding roller (361), a second riding roller (362) and a transfer riding roller group (363), wherein the first riding roller (361) is used for riding and pressing the first ink distributing roller group (321), the second riding roller (362) is used for riding and pressing the dampening system (35), and the transfer riding roller group (363) is used for riding and pressing the ink transferring roller group (329); and under the condition of sending a stop instruction, the ink supply system (31) stops supplying ink, then the ride pressure system (36) cuts off the connection between the ink supply system (31) and the ink equalizing system (32), and then the ride pressure system (36) gradually cuts off the connection between the dampening system (35) and the ink equalizing system (32) and the printing plate roller (33) after delaying.

2. An offset printing press as claimed in claim 1, characterized in that: the ink transfer roller group (329) comprises a first transfer ink equalizing roller (3291), a second transfer ink equalizing roller (3292), a third transfer ink equalizing roller (3293) and a fourth transfer ink equalizing roller (3294), the transfer saddle roller group (363) includes a first transfer saddle roller (3631), a second transfer saddle roller (3632), and a third transfer saddle roller (3633), the first transfer printing ink equalizing roller (3291) and the second transfer printing ink equalizing roller (3292) are in transmission connection with a third movable roller (327), the third transfer printing ink equalizing roller (3293) and the fourth transfer printing ink equalizing roller (3294) are in transmission connection with a fourth movable roller (328), the first transfer riding roller (3631) is used for riding and pressing the first transfer ink-distributing roller (3291), the second transfer riding roller (3632) is used for riding the second transfer ink-equalizing roller (3292) and the third transfer ink-equalizing roller (3293), the third transfer riding roller (3633) is used for riding and pressing the fourth transfer ink-distributing roller (3294).

3. An offset printing press as claimed in claim 2, characterized in that: the first transfer riding roller (3631) rides on the fourth ink distributing roller (324).

4. An offset printing press as claimed in claim 1, characterized in that: the first movable roller (325), the second movable roller (326), the third movable roller (327) and the fourth movable roller (328) are hollow rollers, and a temperature detection device (3211) and circulating temperature control liquid are arranged in the hollow rollers.

5. An offset printing press as claimed in claim 1, characterized in that: the ink supply system (31) comprises an ink tank (311), an ink tank roller (312) connected with the ink tank (311), and an ink guide roller (313) in transmission connection with the ink tank roller (312) and the ink equalizing system (32).

6. An offset printing press as claimed in claim 1, characterized in that: the dampening system (35) comprises a water tank (351), a water tank roller (352) connected with the water tank (351), a quantity adjusting roller (353) in transmission connection with the water tank roller (352), a fifth moving roller (354) connected with the quantity adjusting roller (353), and a plate contacting water roller (355) in transmission connection with the fifth moving roller (354) and the printing plate roller (33), and the riding and pressing system (36) rides and presses the plate contacting water roller (355).

7. An offset printing press as claimed in claim 6, characterized in that: the adjusting roller (353) is connected with a distance adjusting device (356) for adjusting the printing pressure between the adjusting roller and the fifth moving roller (354).

8. An offset printing machine as claimed in any one of claims 1 to 7, characterized in that: the number of the printing mechanisms (3) is four or five.