CN211165873U - Printing roller and double-paper-roller printing machine - Google Patents

Abstract

The utility model discloses a printing roller and two paper roll printing machines belongs to the printing machine among the printing technology field, and its aim at improves the veneer or the laminating effect of printing machine to the note. The printing roller of the printing machine comprises a roller body, a main rotating shaft is arranged in the roller body along the axial direction of the roller body, and an eccentric block is connected to the main rotating shaft along the axial direction of the main rotating shaft. This printing machine is through setting up the eccentric block in the pivot, and the pivot that has the eccentric block is at rotatory in-process, and the pivot will produce the vibration under the effect based on centrifugal force, and two sets of pivots are when gluing or laminating the note, and the effort of pivot to the note is bigger, improves the effect of note veneer or laminating.

Description

Printing roller and double-paper-roller printing machine

Technical Field

The utility model belongs to the technical field of the printing, concretely relates to printing machine for the double-cylinder printing machine of production decorative paper.

Background

A printer is a machine for printing characters and images. Modern printing presses typically consist of mechanisms for plating, inking, stamping, feeding (including folding), etc. The working principle is as follows: the characters and images to be printed are made into printing plate, then it is mounted on the printing machine, then the ink is coated on the position of the characters and images on the printing plate by manual or printing machine, then it is directly or indirectly transferred on the paper or other printing material (such as textile, metal plate, plastics, leather, wood plate, glass and ceramic) so as to reproduce the same printed matter as the printing plate. The printing roller is one of the important components in the printing machine, and includes two main types, namely a hard roller and a soft roller, which are mainly used as roller bodies for stamping, ink adjusting and ink transferring in the printing machine.

In the prior art, most of printing machines are provided with a machine frame, a printing roller is arranged on the machine frame, an ink groove is arranged below the printing roller, and the printing roller dips ink in the ink groove during printing and then prints paper. For example, the utility model with application number 201820863807.1 discloses a single color printing device with two printing rollers, which comprises a frame, a printing roller arranged on the frame, and an ink tank arranged below the printing roller, wherein when in use, paper is wound on the printing roller, and dipped in ink in the ink tank on the printing roller, so that the paper can be printed, and the path of the paper on the frame is a paper path; the method is characterized in that: the printing roller be two, install in the frame around two, the direction of moving according to the paper is by the back to the direction before, is preceding printing roller and back printing roller respectively, is the paper route below preceding printing roller and the back printing roller, is preceding ink tank below the preceding printing roller, is back ink tank below the back printing roller.

Above-mentioned printing device carries out the second printing after the printing of first time, and the centre can dry the product, more can improve product quality. However, in the actual production process, two layers of paper are often required to be glued or laminated. In the process of gluing or attaching two layers of paper, the gluing or attaching effect of the two layers of paper can be improved to a certain degree under the extrusion of the printing roller, but the acting force between the traditional printing rollers is limited, the two layers of paper needing to be glued or attached cannot be glued or attached better, and the gluing or attaching effect is poor.

Disclosure of Invention

The utility model aims to provide a: in order to solve the problem that the gluing or laminating effect of double-layer paper existing in the prior art is poor due to the fact that the acting force between the printing rollers is limited, the application provides a better printing roller and a double-paper-roller printing machine.

The utility model adopts the technical scheme as follows:

the printing roller comprises a roller body, wherein a main rotating shaft is arranged in the roller body along the axial direction of the roller body, and an eccentric block is connected to the main rotating shaft along the axial direction of the main rotating shaft.

In order to improve the gluing or attaching effect of the paper slips, the eccentric block on the main rotating shaft is a fan-shaped eccentric block, and the inner cylindrical surface of the fan-shaped eccentric block is attached to and fixedly connected with the main rotating shaft. The cross section of the fan-shaped eccentric block is not in a fan shape in a strict sense, and the cross section of the fan-shaped eccentric block consists of an inner arc, an outer arc and two straight lines, namely the fan-shaped eccentric block comprises an inner cylindrical surface, an outer cylindrical surface and side planes on two sides.

In order to improve the gluing or fitting effect of the paper slips, a first driven rotating shaft and a second driven rotating shaft are arranged in the roller body along the axial direction of the roller body, and the first driven rotating shaft and the second driven rotating shaft are symmetrically arranged on two sides of the main rotating shaft; the first driven rotating shaft is connected with an eccentric block along the axial direction of the first driven rotating shaft, and the second driven rotating shaft is connected with an eccentric block along the axial direction of the second driven rotating shaft.

For improving the effect of note veneer or laminating, first from epaxial eccentric block of pivot, second from epaxial eccentric block of pivot be fan-shaped eccentric block, and fan-shaped eccentric block's inner cylinder face and first from pivot or the second from pivot laminating and fixed connection. The shapes of the fan-shaped eccentric blocks on the first slave rotating shaft and the second slave rotating shaft are the same as the shape of the fan-shaped eccentric block on the main rotating shaft, and the specific size can be adjusted.

All be equipped with the eccentric block in three pivots, the setting mode of eccentric block is different in the different pivots, will also influence the effect of printing roller. An arrangement mode is provided, namely, the arrangement directions of the eccentric block on the first slave rotating shaft, the eccentric block on the main rotating shaft and the eccentric block on the second slave rotating shaft are the same.

This application still provides another kind of setting mode, all is equipped with the eccentric block in three pivots promptly, and the setting mode of eccentric block is different in the different pivots, also will influence the effect of printing roller. An arrangement is now provided, that is, when the eccentric mass on the main rotating shaft is located on the left side or right side of the main rotating shaft, the eccentric mass on the first slave rotating shaft is located on the upper side or lower side of the first slave rotating shaft, the eccentric mass on the second slave rotating shaft is located on the upper side or lower side of the second slave rotating shaft, and the orientation of the eccentric mass on the first slave rotating shaft is opposite to that of the eccentric mass on the second slave rotating shaft.

For the effect that improves note veneer or laminating, be provided with the inner shell in the roll body, the inner shell surrounds at first follow pivot, the main rotating shaft, the second is followed outside the pivot, and first follow pivot, the main rotating shaft, the second is all installed in the inner shell through the baffle from the pivot, the master gear is installed after the baffle is worn out to the initiative end of main rotating shaft, first follow pivot, the second is installed from the gear after wearing out the baffle respectively from the initiative end of pivot, first follow epaxial slave gear of pivot, the epaxial master gear of main rotating, the epaxial slave gear meshing in proper order is followed to the second, the transmission.

In order to improve the gluing effect of the paper strips, the central angle of the cross section of the fan-shaped eccentric block is 120-150 degrees.

A double paper roll printing machine comprises a guide roll group, a front printing roll group and a rear printing roll group which are arranged in sequence, wherein a first paper strip and a second paper strip are respectively guided by the guide rolls of the guide roll group, then enter the front printing roll group and finally are output by the rear printing roll group; the upper front printing roller of the front printing roller group and the upper rear printing roller of the rear printing roller group both adopt the printing rollers.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:

1. the utility model discloses in, through set up the eccentric block in the pivot, the pivot that has the eccentric block is at rotatory in-process, and the pivot will produce the vibration under the effect based on centrifugal force, and two sets of pivots are when gluing or laminating the note, and the pivot is bigger to the effort of note, improves the effect of note veneer or laminating, and the note of veneer or laminating is more difficult for separating, throw off.

2. The utility model discloses in, through setting up from the pivot and the adjustment from the pivot on the mounted position of eccentric block, can improve the vibration effect of printing roller more effectively, when veneer or laminating, the pivot just can be bigger to the effort of note, the effect of note veneer or laminating is better.

Drawings

FIG. 1 is a schematic view of a printing press according to the present invention;

FIG. 2 is a schematic cross-sectional view of a printing roll according to the present invention;

FIG. 3 is a schematic view of a printing roll according to the present invention;

the labels in the figure are: 1-second slip, 2-lower guide roll, 3-lower front printing roll, 4-first slip, 5-upper guide roll, 6-upper front printing roll, 7-ink supply barrel, 8-transition roll, 9-laminating paper, 10-upper rear printing roll, 11-lower rear printing roll, 12-ink tank, 101-inner shell, 102-eccentric block, 103-second slave rotating shaft, 104-main rotating shaft, 105-first slave rotating shaft, 106-roll body, 107-slave gear, 108-master gear, 109-driving motor.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

This printing machine is including the frame, installs guide roll set, preceding printing roll set, back printing roll set, transition roller 8 in the frame, and guide roll set includes last guide roll 5, lower guide roll 2 that one is last to set up, and preceding printing roll set is including the last preceding printing roll 6 that one is last to set up, printing roll 3 before down, and back printing roll set is including the last back printing roll 10 that one is last to set up, back printing roll 11 down. The first paper slip 4 is guided by the upper guide roller 5, and the second paper slip 1 is guided by the lower guide roller 2 and then passes through the front printing roller; when first note 4, second note 1 got into preceding printing roller, first note 4, second note 1 passed the clearance between printing roller 6, the lower preceding printing roller 3 before last, and printing roller 6, the lower preceding printing roller 3 drives the note and transports forward through the pivoted. Under the action of the upper front printing roller 6 and the lower front printing roller 3, the first paper slip 4 and the second paper slip 1 are preliminarily bonded or attached to form attached paper 9; the laminated paper 9 enters the rear printing roller group after passing through the transition roller 8, the laminated paper 9 passes through a gap between the upper rear printing roller 10 and the lower rear printing roller 11 in the rear printing roller group, and the laminated paper 9 is accumulated and laminated again through the upper rear printing roller 10 and the lower rear printing roller 11 which rotate, and finally output. Further, ink tanks 12 are provided, and two sets of ink tanks 12 are provided and are respectively mounted below the lower front printing roller 3 and the lower rear printing roller 11. An ink supply tank 7 may be further provided, and the ink supply tank 7 is communicated with the front ink tank 12, so that the ink can be continuously supplied by providing such an ink supply tank 7, and the use is more convenient.

When two paper strips are bonded or attached, the effect of the bonding or attachment of the paper strips is a major consideration in the present application. In order to make the paper strip better in adhesion or joint effect, the application provides a printing roller, and the printing roller with the structure is adopted by at least the upper front printing roller 6 and the upper rear printing roller 10 in the printing machine. The printing roller includes a roller body 106, and a main shaft 104 is provided in the roller body 106, and the main shaft 104 is provided in the roller body 106 along an axial direction of the roller body 106. The main shaft 104 is driven and rotated by a driving motor 109 at an end thereof, and there are many ways and structures in which the driving motor 109 drives the main shaft 104 to rotate, and an output shaft of the driving motor 109 may be directly connected to the main shaft 104 for transmission, or may be connected to and driven by a gear mechanism. An eccentric block 102 is arranged on the main rotating shaft 104, and the eccentric block 102 is arranged along the axial direction of the main rotating shaft 104. Through set up eccentric block 102 in the pivot, the pivot that has eccentric block 102 is at rotatory in-process, and the pivot will produce the vibration under the effect of centrifugal force, and two sets of pivots are when gluing or laminating the note, and the effort of pivot to the note is bigger, improves the effect of note veneer or laminating, and the note of veneer or laminating is more difficult for separating, throw off. Because the main rotating shaft 104 can vibrate during the rotation process, the radial vibration amplitude of the main rotating shaft 104 can be directly realized through the radial variation allowance of the inner ring and the outer ring of the bearing in the bearing seat for mounting the main rotating shaft 104, and the bearing seat does not need to be additionally provided with an auxiliary structure.

In order to improve the effect of gluing or adhering the paper strips, the eccentric block 102 on the main rotating shaft 104 is a fan-shaped eccentric block 102, and the inner cylindrical surface of the fan-shaped eccentric block 102 is adhered and fixedly connected with the main rotating shaft 104. The cross section of the eccentric sector block 102 is not strictly sector, and the cross section of the eccentric sector block 102 is composed of an inner arc, an outer arc and two straight lines, that is, the eccentric sector block 102 includes an inner cylindrical surface, an outer cylindrical surface and two side planes.

In order to improve the effect of gluing or attaching the paper slips, a first slave rotating shaft 105 and a second slave rotating shaft 103 are arranged in the roller body 106 along the axial direction of the roller body 106, and the first slave rotating shaft 105 and the second slave rotating shaft 103 are symmetrically arranged on two sides of the main rotating shaft 104; an eccentric mass 102 is connected to the first slave rotating shaft 105 in the axial direction of the first slave rotating shaft 105, and an eccentric mass 102 is connected to the second slave rotating shaft 103 in the axial direction of the second slave rotating shaft 103.

In order to improve the effect of gluing or attaching the paper slip, the eccentric block 102 on the first driven rotating shaft 105 and the eccentric block 102 on the second driven rotating shaft 103 are both fan-shaped eccentric blocks 102, and the inner cylindrical surface of each fan-shaped eccentric block 102 is attached and fixedly connected with the first driven rotating shaft 105 or the second driven rotating shaft 103. The shape of the fan-shaped eccentric block 102 on the first slave rotating shaft 105 and the second slave rotating shaft 103 is the same as that of the fan-shaped eccentric block 102 on the main rotating shaft 104, and the specific size can be adjusted.

The eccentric blocks 102 are arranged on the three rotating shafts, and the effect of the printing roller is influenced due to different arrangement modes of the eccentric blocks 102 on different rotating shafts. Now, an arrangement mode is provided, namely, the arrangement orientation of the eccentric block 102 on the first slave rotating shaft 105, the eccentric block 102 on the main rotating shaft 104 and the eccentric block 102 on the second slave rotating shaft 103 is the same.

The application also provides another setting mode, namely, the eccentric blocks 102 are arranged on the three rotating shafts, and the setting modes of the eccentric blocks 102 on different rotating shafts are different, so that the effect of the printing roller is also influenced. An arrangement is now provided such that when the eccentric mass 102 on the main rotating shaft 104 is positioned at the left or right side of the main rotating shaft 104, the eccentric mass 102 on the first slave rotating shaft 105 is positioned at the upper or lower side of the first slave rotating shaft 105, the eccentric mass 102 on the second slave rotating shaft 103 is positioned at the upper or lower side of the second slave rotating shaft 103, and the orientation of the eccentric mass 102 on the first slave rotating shaft 105 is opposite to that of the eccentric mass 102 on the second slave rotating shaft 103.

In order to improve the effect of gluing or attaching the paper slips, an inner shell 101 is arranged in the roller body 106, the inner shell 101 is surrounded outside the first slave rotating shaft 105, the main rotating shaft 104 and the second slave rotating shaft 103, the first slave rotating shaft 105, the main rotating shaft 104 and the second slave rotating shaft 103 are all installed in the inner shell 101 through partition plates, a main gear 108 is installed after the active end of the main rotating shaft 104 penetrates out of the partition plates, slave gears 107 are installed after the active ends of the first slave rotating shaft 105 and the second slave rotating shaft 103 respectively penetrate out of the partition plates, and a slave gear 107 on the first slave rotating shaft 105, a main gear 108 on the main rotating shaft 104 and a slave gear 107 on the second slave rotating shaft 103 are sequentially meshed and driven.

In order to improve the gluing effect of the paper strips, the central angle of the cross section of the fan-shaped eccentric block 102 is 120-150 degrees.

Example 1

A printing roller is provided, and at least the upper front printing roller 6 and the upper rear printing roller 10 of the printing machine adopt the printing roller with the structure. The printing roller includes a roller body 106, and a main shaft 104 is provided in the roller body 106, and the main shaft 104 is provided in the roller body 106 along an axial direction of the roller body 106. The main shaft 104 is driven and rotated by a driving motor 109 at an end thereof, and there are many ways and structures in which the driving motor 109 drives the main shaft 104 to rotate, and an output shaft of the driving motor 109 may be directly connected to the main shaft 104 for transmission, or may be connected to and driven by a gear mechanism. An eccentric block 102 is arranged on the main rotating shaft 104, and the eccentric block 102 is arranged along the axial direction of the main rotating shaft 104. Through set up eccentric block 102 in the pivot, the pivot that has eccentric block 102 is at rotatory in-process, and the pivot will produce the vibration under the effect of centrifugal force, and two sets of pivots are when gluing or laminating the note, and the effort of pivot to the note is bigger, improves the effect of note veneer or laminating, and the note of veneer or laminating is more difficult for separating, throw off.

Example 2

On the basis of the first embodiment, the eccentric mass 102 on the main rotating shaft 104 is a fan-shaped eccentric mass 102, and the inner cylindrical surface of the fan-shaped eccentric mass 102 is attached and fixedly connected with the main rotating shaft 104. The cross section of the eccentric sector block 102 is not strictly sector, and the cross section of the eccentric sector block 102 is composed of an inner arc, an outer arc and two straight lines, that is, the eccentric sector block 102 includes an inner cylindrical surface, an outer cylindrical surface and two side planes.

Example 3

On the basis of the first embodiment or the second embodiment, a first slave rotating shaft 105 and a second slave rotating shaft 103 are arranged in the roller body 106 along the axial direction of the roller body 106, and the first slave rotating shaft 105 and the second slave rotating shaft 103 are symmetrically arranged on two sides of the main rotating shaft 104; an eccentric mass 102 is connected to the first slave rotating shaft 105 in the axial direction of the first slave rotating shaft 105, and an eccentric mass 102 is connected to the second slave rotating shaft 103 in the axial direction of the second slave rotating shaft 103.

Example 4

On the basis of the third embodiment, the eccentric mass 102 on the first slave rotating shaft 105 and the eccentric mass 102 on the second slave rotating shaft 103 are both fan-shaped eccentric masses 102, and the inner cylindrical surface of each fan-shaped eccentric mass 102 is attached and fixedly connected with the first slave rotating shaft 105 or the second slave rotating shaft 103. The shape of the fan-shaped eccentric block 102 on the first slave rotating shaft 105 and the second slave rotating shaft 103 is the same as that of the fan-shaped eccentric block 102 on the main rotating shaft 104, and the specific size can be adjusted.

Example 5

On the basis of the fourth embodiment, the eccentric blocks 102 are arranged on the three rotating shafts, and the effect of the printing roller is also affected due to different arrangement modes of the eccentric blocks 102 on different rotating shafts. Now, an arrangement mode is provided, namely, the arrangement orientation of the eccentric block 102 on the first slave rotating shaft 105, the eccentric block 102 on the main rotating shaft 104 and the eccentric block 102 on the second slave rotating shaft 103 is the same.

Example 6

On the basis of the fourth embodiment, the present embodiment further provides another setting manner, that is, the eccentric blocks 102 are disposed on the three rotating shafts, and the setting manner of the eccentric blocks 102 on different rotating shafts is different, which will also affect the effect of the printing roller. An arrangement is now provided such that when the eccentric mass 102 on the main rotating shaft 104 is positioned at the left or right side of the main rotating shaft 104, the eccentric mass 102 on the first slave rotating shaft 105 is positioned at the upper or lower side of the first slave rotating shaft 105, the eccentric mass 102 on the second slave rotating shaft 103 is positioned at the upper or lower side of the second slave rotating shaft 103, and the orientation of the eccentric mass 102 on the first slave rotating shaft 105 is opposite to that of the eccentric mass 102 on the second slave rotating shaft 103.

Example 7

On the basis of the third to sixth embodiments, an inner shell 101 is disposed in the roller body 106, the inner shell 101 surrounds the first slave rotating shaft 105, the main rotating shaft 104, and the second slave rotating shaft 103, and the first slave rotating shaft 105, the main rotating shaft 104, and the second slave rotating shaft 103 are all installed in the inner shell 101 through partitions, a master gear 108 is installed after the master end of the main rotating shaft 104 penetrates through the partitions, slave gears 107 are installed after the master ends of the first slave rotating shaft 105 and the second slave rotating shaft 103 respectively penetrate through the partitions, and a slave gear 107 on the first slave rotating shaft 105, a master gear 108 on the main rotating shaft 104, and a slave gear 107 on the second slave rotating shaft 103 are sequentially engaged and driven.

Example 8

On the basis of the second embodiment to the seventh embodiment, the central angle of the cross section of the fan-shaped eccentric block 102 is 120-150 degrees, and preferably 120 degrees.

Example 9

The utility model provides a printing machine, its includes the frame, installs guide roll set, preceding printing roll set, back printing roll set, transition roller 8 in the frame, and guide roll set includes last guide roll 5, lower guide roll 2 that one is last to set up, and preceding printing roll set is including the last preceding printing roll 6 that one is last to set up, lower preceding printing roll 3, and back printing roll set is including the last back printing roll 10 that one is last to set up, lower back printing roll 11. The first paper slip 4 is guided by the upper guide roller 5, and the second paper slip 1 is guided by the lower guide roller 2 and then passes through the front printing roller; when first note 4, second note 1 got into preceding printing roller, first note 4, second note 1 passed the clearance between printing roller 6, the lower preceding printing roller 3 before last, and printing roller 6, the lower preceding printing roller 3 drives the note and transports forward through the pivoted. Under the action of the upper front printing roller 6 and the lower front printing roller 3, the first paper slip 4 and the second paper slip 1 are preliminarily bonded or attached to form attached paper 9; the laminated paper 9 enters the rear printing roller group after passing through the transition roller 8, the laminated paper 9 passes through a gap between the upper rear printing roller 10 and the lower rear printing roller 11 in the rear printing roller group, and the laminated paper 9 is accumulated and laminated again through the upper rear printing roller 10 and the lower rear printing roller 11 which rotate, and finally output. Further, ink tanks 12 are provided, and two sets of ink tanks 12 are provided and are respectively mounted below the lower front printing roller 3 and the lower rear printing roller 11. An ink supply barrel 7 can be further provided, the ink supply barrel 7 is communicated with the front ink groove 12, and the ink can be continuously supplied by arranging the ink supply barrel 7, so that the use is more convenient

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (9)

1. A printing roller comprising a roller body (106), characterized in that: a main rotating shaft (104) is arranged in the roller body (106) along the axial direction of the roller body (106), and an eccentric block (102) is connected to the main rotating shaft (104) along the axial direction of the main rotating shaft (104).

2. The printing roll according to claim 1, characterized in that: the eccentric block (102) on the main rotating shaft (104) is a fan-shaped eccentric block, and the inner cylindrical surface of the fan-shaped eccentric block is attached and fixedly connected with the main rotating shaft (104).

3. The printing roll according to claim 1, characterized in that: a first slave rotating shaft (105) and a second slave rotating shaft (103) are arranged in the roller body (106) along the axial direction of the roller body (106), and the first slave rotating shaft (105) and the second slave rotating shaft (103) are symmetrically arranged at two sides of the main rotating shaft (104); an eccentric block (102) is connected to the first driven rotating shaft (105) along the axial direction of the first driven rotating shaft (105), and an eccentric block (102) is connected to the second driven rotating shaft (103) along the axial direction of the second driven rotating shaft (103).

4. The printing roll according to claim 3, characterized in that: the eccentric block (102) on the first slave rotating shaft (105) and the eccentric block (102) on the second slave rotating shaft (103) are both fan-shaped eccentric blocks, and the inner cylindrical surface of each fan-shaped eccentric block is attached to and fixedly connected with the first slave rotating shaft (105) or the second slave rotating shaft (103).

5. The printing roll according to claim 4, characterized in that: the arrangement directions of the eccentric block (102) on the first slave rotating shaft (105), the eccentric block (102) on the main rotating shaft (104) and the eccentric block (102) on the second slave rotating shaft (103) are the same.

6. The printing roll according to claim 4, characterized in that: when the eccentric block (102) on the main rotating shaft (104) is positioned at the left side or the right side of the main rotating shaft (104), the eccentric block (102) on the first slave rotating shaft (105) is positioned at the upper side or the lower side of the first slave rotating shaft (105), the eccentric block (102) on the second slave rotating shaft (103) is positioned at the upper side or the lower side of the second slave rotating shaft (103), and the eccentric block (102) on the first slave rotating shaft (105) and the eccentric block (102) on the second slave rotating shaft (103) are opposite in orientation.

7. The printing roll according to claim 3, characterized in that: an inner shell (101) is arranged in the roller body (106), the inner shell (101) is surrounded on a first slave rotating shaft (105), a main rotating shaft (104) and a second slave rotating shaft (103), the first slave rotating shaft (105), the main rotating shaft (104) and the second slave rotating shaft (103) are installed in the inner shell (101) through a partition plate, a main gear (108) is installed after the driving end of the main rotating shaft (104) penetrates out of the partition plate, a slave gear (107) is installed after the driving ends of the first slave rotating shaft (105) and the second slave rotating shaft (103) respectively penetrate out of the partition plate, a slave gear (107) on the first slave rotating shaft (105), a main gear (108) on the main rotating shaft (104) and a slave gear (107) on the second slave rotating shaft (103) are meshed and transmitted in sequence.

8. The printing roller according to claim 2 or 4, characterized in that: the central angle of the cross section of the fan-shaped eccentric block is 120-150 degrees.

9. A double paper roll printing machine comprises a guide roll group, a front printing roll group and a rear printing roll group which are sequentially arranged, wherein a first paper strip (4) and a second paper strip (1) are respectively guided by the guide rolls of the guide roll group, then enter the front printing roll group and finally are output by the rear printing roll group; the method is characterized in that: the upper front printing roll (6) of the front printing roll group and the upper rear printing roll (10) of the rear printing roll group adopt the printing rolls of any one of claims 1 to 8.

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