Printing roller for printing

Abstract

The utility model relates to the technical field of printing equipment, in particular to a printing roller which comprises a roller core body, roller shafts are arranged at the two ends of the roller core body, and a rubber sleeve detachably sleeves the periphery of the roller core body in the circumferential direction. Each roller shaft is provided with a positioning assembly used for positioning the sleeving position of the rubber sleeve on the roller core body, and the roller core body is provided with a fixing assembly used for fixing the rubber sleeve. The printing roller has the effects that the convenience of the operation process is improved when the rubber sleeve of the printing roller is overhauled or replaced, and therefore the efficiency is improved when the rubber sleeve of the printing roller is overhauled or replaced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of printing equipment, in particular to a printing roller for printing. BACKGROUND

[0002] Printing is a technology of copying the content of original draft by transferring ink to the surface of materials such as paper, fabric, plastic and leather through processes such as plate making, ink application and pressure, which is a process of transferring the approved printing plate to the transfer material by printing equipment and special ink. In the printing equipment, the printing roller is one of the indispensable core accessories, which plays the role of impression, ink adjustment and ink transfer.

[0003] The printing roller is usually composed of a metal roller core and a rubber sleeve sleeved on the periphery of the metal roller core. After the printing roller is used for a long time, the rubber sleeve on the periphery of the printing roller may harden due to long-term pressure, friction and environmental factors, which may affect the performance of the printing roller. Therefore, the rubber sleeve needs to be repaired or replaced regularly to ensure the performance of the printing roller.

[0004] However, the existing printing roller is mostly fixedly connected by gluing the rubber sleeve and the metal roller core. When the rubber sleeve is repaired or replaced, the operation process of detaching the rubber sleeve from the metal roller core is complicated and time-consuming, which is very inconvenient. CONTENT OF THE INVENTION

[0005] In order to improve the convenience of the operation process of repairing or replacing the rubber sleeve of the printing roller, thereby improving the efficiency of repairing and replacing the rubber sleeve of the printing roller, the present application provides a printing roller for printing.

[0006] The present application provides a printing roller for printing, which adopts the following technical scheme:

[0007] A printing roller for printing, comprising a roller core body, both ends of the roller core body are provided with roller shafts, a rubber sleeve is detachably sleeved on the circumferential periphery of the roller core body, a positioning mechanism for positioning the sleeving position of the rubber sleeve on the roller core body is arranged on each roller shaft, and a fixing assembly for fixing the rubber sleeve is arranged on the roller core body.

[0008] By adopting the technical scheme, the positioning mechanism helps to position the sleeving position of the rubber sleeve on the roller core body, the fixing assembly helps to fix the positioned rubber sleeve, thereby helping to fix the rubber sleeve to the circumferential periphery of the roller core body; the cooperation of the positioning mechanism and the fixing assembly helps to detachably install the rubber sleeve on the roller core body, thereby helping to improve the convenience of the operation process when the rubber sleeve of the printing roller is overhauled or replaced, and further helping to improve the efficiency when the rubber sleeve of the printing roller is overhauled or replaced.

[0009] In a specific implementable scheme, the fixing assembly comprises a top supporting plate and a piston body, the roller core body is provided with a gas cavity, the circumferential outer wall of the roller core body is provided with a placing groove, the roller core body is further provided with a piston channel for communicating the gas cavity and the placing groove, the top supporting plate is movably arranged in the placing groove, and the shape of the top supporting plate matches the shape of the placing groove, and the piston body is movably arranged in the piston channel and fixedly connected with the top supporting plate.

[0010] By adopting the technical scheme, when the rubber sleeve is sleeved and positioned on the roller core body, the external gas source is used to fill gas into the gas cavity, thereby helping to move the piston body in the piston channel away from the gas cavity, further helping to move the top supporting plate towards the periphery, helping to fix the rubber sleeve by the top supporting plate, and helping to fix the rubber sleeve to the circumferential periphery of the roller core body.

[0011] In a specific implementable scheme, the top supporting plate and the piston body are one-to-one corresponding and each are provided with a plurality of top supporting plates and piston bodies, and the plurality of top supporting plates and the plurality of piston bodies are arranged in a ring array along the central axis of the roller core body.

[0012] By adopting the technical scheme, the positions of the plurality of piston bodies and the plurality of top supporting plates help to improve the fixing effect of the top supporting plate on the rubber sleeve, thereby helping to improve the stability of the rubber sleeve installed on the roller core body.

[0013] In a specific implementable scheme, the fixing assembly comprises a top supporting gas bag, a main air pipe and a branch air pipe, the circumferential outer wall of the roller core body is provided with a ring groove, the top supporting gas bag is arranged in the ring groove, the roller core body is hollow inside, the main air pipe is arranged inside the roller core body and along the central axis of the roller core body, one end of the branch air pipe is fixedly communicated with the main air pipe, and the other end of the branch air pipe is fixedly communicated with the top supporting gas bag.

[0014] By adopting the technical scheme, after the rubber sleeve is positioned and sleeved on the periphery of the roller core body, the external gas source is used to fill gas into the ventilation main pipe, so that the gas is filled into the supporting air bag through the ventilation branch pipe, which helps the supporting air bag to inflate, thereby helping the supporting air bag to support and fix the rubber sleeve, and helping the rubber sleeve to be fixed and sleeved on the periphery of the roller core body.

[0015] In a specific implementation, the ventilation branch pipes are arranged in multiple groups, and the ventilation branch pipes in each group are arranged in an annular array along the central axis of the ventilation main pipe.

[0016] By adopting the technical scheme, the number and position of the ventilation branch pipes are arranged, which helps to improve the uniformity of inflation of the supporting air bag at each position, thereby helping to improve the supporting and fixing effect of the supporting air bag on the rubber sleeve.

[0017] In a specific implementation, the positioning mechanism includes a positioning disc, the positioning disc is fixedly sleeved on the roller shaft, a first mounting groove is arranged on the circumferential side wall of the positioning disc, a positioning baffle is movably arranged in the first mounting groove, a connecting spring is arranged on the positioning baffle, the connecting spring is connected with the groove wall of the first mounting groove, and an ejection assembly for ejecting the positioning baffle out of the first mounting groove is arranged in the positioning disc.

[0018] By adopting the technical scheme, after the rubber sleeve is sleeved on the periphery of the roller core body, the ejection assembly helps to eject the positioning baffle partially out of the positioning disc, thereby helping to position the sleeving position of the rubber sleeve on the roller core body by the positioning baffle, and further helping to improve the accuracy of the sleeving position of the rubber sleeve on the roller core body.

[0019] In a specific implementation, the ejection assembly includes a rotating ring, an ejection block, an elastic ejection rod, and a pushing rod, an installation cavity is arranged in the positioning disc, the installation cavity is in communication with the first mounting groove, the rotating ring is rotatably arranged in the installation cavity, a second mounting groove is arranged on the circumferential outer wall of the rotating ring, the ejection block is movably arranged in the second mounting groove, one end of the elastic ejection rod is connected with the ejection block, the other end of the elastic ejection rod is connected with the groove wall of the second mounting groove, a pushing track is arranged on the side of the positioning disc away from the roller core body, the pushing track is in communication with the installation cavity, the pushing rod is arranged on the rotating ring, and one end of the pushing rod away from the rotating ring penetrates and extends out of the pushing track.

[0020] By adopting the technical scheme, after the rubber sleeve is sleeved on the circumferential periphery of the roller core body, the operator moves the poking rod along the poking track, drives the rotating ring to rotate in the installation cavity, the second installation groove is in alignment and communication with the first installation groove after the rotating ring is rotated, the ejection block is ejected towards the positioning baffle under the elastic force of the elastic ejection rod, and then the positioning baffle part is partially ejected from the positioning disc, the sleeving position of the rubber sleeve on the roller core body is positioned through the positioning baffle, and the accuracy of the sleeving position of the rubber sleeve on the roller core body is improved.

[0021] In a specific implementation, an end of the poking rod away from the rotating ring is provided with a gripping plate, a telescopic spring is sleeved on the poking rod, one end of the telescopic spring is connected with the gripping plate, the other end of the telescopic spring is connected with a movable plate, the movable plate is sleeved on the poking rod in a sliding mode, a positioning insertion rod is arranged on a side of the movable plate facing the positioning disc, and a positioning insertion hole for the positioning insertion rod is arranged on the positioning disc.

[0022] By adopting the technical scheme, when the poking rod is moved to a specified position, the positioning insertion rod is inserted into the positioning insertion hole, the movement of the poking rod is limited, and the stability of the position of the poking rod is improved. When the poking rod needs to be moved, the operator moves the movable plate to make the telescopic spring contract, the positioning insertion rod is driven out of the positioning insertion hole, and the operator can move the poking rod conveniently.

[0023] In summary, the present application has at least one of the following beneficial technical effects:

[0024] 1. The present application is provided with a positioning mechanism and a fixing assembly, the positioning mechanism is used for positioning the sleeving position of the rubber sleeve on the roller core body, the fixing assembly is used for fixing the positioned rubber sleeve, the rubber sleeve is fixedly sleeved on the circumferential periphery of the roller core body, the cooperation of the positioning mechanism and the fixing assembly enables the rubber sleeve to be detachably installed on the roller core body, the convenience of the operation process when the rubber sleeve of the printing roller is overhauled or replaced is improved, and the efficiency when the rubber sleeve of the printing roller is overhauled or replaced is improved. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a schematic view of the overall structure of the embodiment 1 of the present application.

[0026] Figure 2 is an exploded view of the specific structure of the embodiment 1 of the present application.

[0027] Figure 3 is a schematic view of the overall structure of the positioning mechanism.

[0028] Figure 4 is a sectional view embodying the internal specific structure of the positioning disc.

[0029] Figure 5 is a sectional view embodying the specific structure of the fixing assembly in Embodiment 1.

[0030] Figure 6 is a sectional view embodying the specific structure of the fixing assembly in Embodiment 2.

[0031] BRIEF DESCRIPTION OF DRAWINGS 1, roller core main body; 2, roller shaft; 3, rubber sleeve; 4, fixing assembly; 41, top support plate; 42, piston body; 43, top support air bag; 44, air main pipe; 45, air branch pipe; 5, air cavity; 6, placing groove; 7, piston channel; 8, annular groove; 9, ejection assembly; 91, rotating ring; 92, ejection block; 93, elastic ejection rod; 94, toggle lever; 10, positioning disc; 11, first installation groove; 12, positioning baffle; 13, connecting spring; 14, installation cavity; 15, second installation groove; 16, toggle track; 17, gripping plate; 18, extension spring; 19, movable plate; 20, positioning plug; 21, positioning hole. DETAILED DESCRIPTION

[0032] The application will be further described in detail below with reference to the accompanying drawings.

[0033] Embodiment 1

[0034] The embodiment of the application discloses a printing roller for printing, referring to Figure 1 and Figure 2 , comprising a roller core main body 1, both ends of the length direction of the roller core main body 1 are integrally formed with roller shafts 2. The roller core main body 1 is provided with a fixing assembly 4, and a rubber sleeve 3 is detachably sleeved on the circumferential periphery of the roller core main body 1, and each roller shaft 2 is provided with a positioning mechanism.

[0035] Referring to Figure 3 and Figure 4 , each positioning mechanism comprises a positioning disc 10, the positioning disc 10 is fixedly sleeved on the roller shaft 2 and the diameter of the positioning disc 10 is the same as the diameter of the roller core main body 1, a plurality of first installation grooves 11 are spaced apart on the circumferential side wall of the positioning disc 10, a positioning baffle 12 is movably installed in each first installation groove 11, a connecting spring 13 is fixedly connected to the positioning baffle 12, and the connecting spring 13 is fixedly connected with the groove wall of the first installation groove 11.

[0036] Referring to Figure 3 and Figure 4, the positioning disc 10 is internally provided with multiple sets of ejection assemblies 9, and the number of the ejection assemblies 9 is the same as that of the positioning baffle plates 12. Each set of the ejection assemblies 9 comprises a rotating ring 91, an ejection block 92, an elastic ejection rod 93 and a pushing rod 94, the positioning disc 10 is internally provided with an annular mounting cavity 14, multiple first mounting grooves 11 are in communication with the mounting cavity 14, the rotating ring 91 is rotatably arranged in the mounting cavity 14, multiple second mounting grooves 15 are spaced apart on the circumferential outer wall of the rotating ring 91, and the number of the second mounting grooves 15 is the same as that of the first mounting grooves 11. One end of the elastic ejection rod 93 is fixedly connected with the groove wall of the second mounting groove 15, the other end is fixedly connected with the ejection block 92, and the ejection block 92 is located in the second mounting groove 15. One end of the pushing rod 94 is fixedly connected with the side of the rotating ring 91 away from the roller core body 1, the other end penetrates through and extends out of the positioning disc 10, and the positioning disc 10 is provided with a pushing track 16 in communication with the mounting cavity 14.

[0037] With reference to Figure 3 , the end of the pushing rod 94 extending out of the positioning disc 10 is fixedly provided with a gripping plate 17, and a telescopic spring 18 is sleeved on the section of the pushing rod 94 extending out of the positioning disc 10. One end of the telescopic spring 18 is fixedly connected with the gripping plate 17, the other end is fixedly connected with a movable plate 19, and the movable plate 19 is slidably sleeved on the pushing rod 94. The side of the movable plate 19 facing the positioning disc 10 is fixedly provided with a positioning plug 20, and the positioning disc 10 is provided with positioning plug holes 21 at both ends of the pushing track 16.

[0038] With reference to Figure 3 and Figure 4 During the assembly of the rubber sleeve 3, the operator pushes the pushing rod 94 along the pushing track 16, drives the rotating ring 91 to rotate in the mounting cavity 14, and when the rotating ring 91 rotates to align the second mounting grooves 15 with the first mounting grooves 11, the ejection block 92 is ejected towards the positioning baffle plate 12 under the elastic force of the elastic ejection rod 93, thereby partially ejecting the positioning baffle plate 12 out of the positioning disc 10. The ejection of the positioning baffle plate 12 out of the positioning disc 10 helps to position the sleeving position of the rubber sleeve 3 on the roller core body 1, thereby improving the accuracy of the sleeving position of the rubber sleeve 3 on the roller core body 1.

[0039] With reference to Figure 3 and Figure 4 When the rotating ring 91 is rotated to completion, one end of the positioning plug 20 is inserted into the positioning plug hole 21, thereby limiting the movement of the pushing rod 94 and helping to improve the stability of the pushing rod 94 and the rotating disc position.

[0040] With reference to Figure 5The fixed assembly 4 comprises a plurality of top supporting plates 41 and a plurality of piston bodies 42, each top supporting plate 41 is correspondingly arranged with one piston body 42, the roller core body 1 is internally provided with a gas cavity 5, the circumferential outer wall of the roller core body 1 is provided with a plurality of placing grooves 6, the roller core body 1 is internally provided with a plurality of piston channels 7, the plurality of placing grooves 6 and the plurality of piston channels 7 are arranged in a ring shape along the central axis of the roller core body 1, and each piston channel 7 is in communication with one placing groove 6 and the gas cavity 5. Each top supporting plate 41 can be movably arranged in the placing groove 6, and the shape of the top supporting plate 41 is matched with the shape of the placing groove 6, each piston body 42 can be movably arranged in the piston channel 7, and each piston body 42 is fixedly connected with one top supporting plate 41.

[0041] With reference to Figure 2 and Figure 5 When the rubber sleeve 3 is positioned on the roller core body 1, the gas cavity 5 is filled with gas through an external gas source, so that the piston body 42 is driven by the gas pressure to move along the piston channel 7 towards the direction away from the gas cavity 5, thereby driving the top supporting plate 41 to move towards the periphery of the roller core body 1, which helps to fix the rubber sleeve 3 on the roller core body 1 by the top supporting plate 41, so that the rubber sleeve 3 is fixedly sleeved on the periphery of the roller core body 1.

[0042] With reference to Figure 2 and Figure 5 When it is necessary to disassemble the rubber sleeve 3, the gas in the gas cavity 5 is extracted by an external gas extraction device, so that a negative pressure is generated in the gas cavity 5, thereby driving the piston body 42 to move along the piston channel 7 towards the direction close to the gas cavity 5, and further driving the top supporting plate 41 to retract into the placing groove 6, which helps to release the fixing effect of the top supporting plate 41 on the rubber sleeve 3 on the roller core body 1, thereby facilitating the disassembly of the rubber sleeve 3 from the roller core body 1, which helps to improve the convenience of the operation process when the rubber sleeve 3 of the printing roller is maintained or replaced, and improves the efficiency when the rubber sleeve 3 of the printing roller is maintained or replaced.

[0043] With reference to Figure 3 and Figure 4 The operator reversely drives the driving rod 94, drives the rotating ring 91 to reversely rotate in the mounting cavity 14, thereby driving the ejecting block 92 to retract into the second mounting groove 15 under the action of the positioning disc 10, and no longer applying action to the positioning baffle 12, thereby driving the positioning baffle 12 to retract into the first mounting groove 11 under the action of the connecting spring 13, and further facilitating the disassembly of the rubber sleeve 3 from the roller core body 1, which further improves the convenience of the operation process when the rubber sleeve 3 of the printing roller is maintained or replaced, and further improves the efficiency when the rubber sleeve 3 of the printing roller is maintained or replaced.

[0044] The implementation principle of the embodiment of the present application is that when the rubber sleeve 3 needs to be disassembled, the gas in the air cavity 5 is extracted by an external air extraction device, so that a negative pressure is generated inside the air cavity 5, thereby causing the piston body 42 to move along the piston channel 7 towards the direction close to the air cavity 5 under the action of the negative pressure, and further causing the jacking plate 41 to retract into the placement groove 6, which helps to release the jacking and fixing effect of the jacking plate 41 on the rubber sleeve 3 sleeved on the roller core body 1, thereby facilitating the disassembly of the rubber sleeve 3 from the roller core body 1, and improving the convenience of the operation process when the rubber sleeve 3 of the printing roller is overhauled or replaced, and improving the efficiency when the rubber sleeve 3 of the printing roller is overhauled and replaced.

[0045] The operator reversely drives the driving rod 94, drives the rotating ring 91 to reversely rotate in the installation cavity 14, so that the ejector block 92 retracts into the second installation groove 15 under the action of the positioning disc 10, no longer exerts an action on the positioning baffle 12, so that the positioning baffle 12 retracts into the first installation groove 11 under the action of the connecting spring 13, thereby facilitating the removal of the rubber sleeve 3 from the roller core body 1, further improving the convenience of the operation process when the rubber sleeve 3 of the printing roller is overhauled or replaced, and further improving the efficiency when the rubber sleeve 3 of the printing roller is overhauled and replaced.

[0046] Embodiment 2:

[0047] With reference to Figure 6 The difference between the embodiment of the present application and embodiment 1 is that the fixing assembly 4 comprises a jacking air bag 43, a ventilation main pipe 44 and ventilation branch pipes 45. In the embodiment, a plurality of groups of ventilation branch pipes 45 are arranged, an annular groove 8 is formed in the circumferential outer wall of the roller core body 1, and the jacking air bag 43 is fixedly installed in the annular groove 8. The roller core body 1 is hollow inside, the ventilation main pipe 44 is fixedly installed inside the roller core body 1 and arranged along the central axis of the roller core body 1, one end of each ventilation branch pipe 45 is fixedly communicated with the ventilation main pipe 44, and the other end is fixedly communicated with the jacking air bag 43. The plurality of groups of ventilation branch pipes 45 are arranged in the axial direction of the ventilation main pipe 44, and each group of ventilation branch pipes 45 is arranged in an annular array along the central axis of the ventilation main pipe 44.

[0048] With reference to Figure 6 When the rubber sleeve 3 is sleeved and positioned on the roller core body 1, the ventilation main pipe 44 is filled with gas through an external gas source, so that the gas is filled into the jacking air bag 43 through the plurality of ventilation branch pipes 45, thereby causing the jacking air bag 43 to inflate and expand, which helps to jacking and fix the rubber sleeve 3 after the expansion of the jacking air bag 43, and helps to fix the rubber sleeve 3 to be sleeved on the circumferential periphery of the roller core body 1.

[0049] With reference to Figure 6When the rubber sleeve 3 needs to be disassembled, the air in the supporting air bag 43 is extracted through the air extraction equipment outside the main air pipe 44 and the branch air pipes 45, so as to release the supporting and fixing effect of the supporting air bag 43 on the rubber sleeve 3, and facilitate the disassembly of the rubber sleeve 3 from the roller core body 1, which helps to improve the convenience of the operation process when the rubber sleeve 3 of the printing roller is maintained or replaced, and improves the efficiency when the rubber sleeve 3 of the printing roller is maintained and replaced.

[0050] The implementation principle of the embodiment of the present application is: when the rubber sleeve 3 needs to be disassembled, the air in the supporting air bag 43 is extracted through the air extraction equipment outside the main air pipe 44 and the branch air pipes 45, so as to release the supporting and fixing effect of the supporting air bag 43 on the rubber sleeve 3, and facilitate the disassembly of the rubber sleeve 3 from the roller core body 1, which helps to improve the convenience of the operation process when the rubber sleeve 3 of the printing roller is maintained or replaced, and improves the efficiency when the rubber sleeve 3 of the printing roller is maintained and replaced.

[0051] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, therefore: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A printing roll for printing, characterized by: The roller core body (1) includes a roller shaft (2) at both ends. A rubber sleeve (3) is detachably fitted on the circumferential periphery of the roller core body (1). Each roller shaft (2) is provided with a positioning mechanism for positioning the rubber sleeve (3) on the roller core body (1). The roller core body (1) is provided with a fixing assembly (4) for fixing the rubber sleeve (3). The fixing assembly (4) includes a top support plate (41) and a piston body (42). An air chamber is provided inside the roller core body (1). 5) A placement groove (6) is provided on the circumferential outer wall of the roller core body (1). A piston channel (7) for connecting the air chamber (5) and the placement groove (6) is also provided inside the roller core body (1). The top support plate (41) is movably disposed in the placement groove (6), and the shape of the top support plate (41) matches the shape of the placement groove (6). The piston body (42) is movably disposed in the piston channel (7), and the piston body (42) is fixedly connected to the top support plate (41); or the fixing component (4) includes a top support air chamber. The roller core body (1) comprises a support airbag (43), a main ventilation pipe (44), and a branch ventilation pipe (45). An annular groove (8) is provided on the circumferential outer wall of the roller core body (1). The support airbag (43) is disposed within the annular groove (8). The roller core body (1) is hollow inside. The main ventilation pipe (44) is disposed inside the roller core body (1) and along its central axis. One end of the branch ventilation pipe (45) is fixedly connected to the main ventilation pipe (44), and the other end is fixedly connected to the support airbag (43). The positioning mechanism includes a positioning disk (10), which is fixedly sleeved on the roller (2). A first mounting groove (11) is provided on the circumferential side wall of the positioning disk (10). A positioning baffle (12) is movably arranged in the first mounting groove (11). A connecting spring (13) is provided on the positioning baffle (12), and the connecting spring (13) is connected to the groove wall of the first mounting groove (11). An ejection component (9) for ejecting the positioning baffle (12) out of the first mounting groove (11) is provided in the positioning disk (10).

2. A printing roller for printing according to claim 1, characterized in that: The top support plate (41) and the piston body (42) are one-to-one and there are multiple of each. The multiple top support plates (41) and the multiple piston bodies (42) are arranged in a ring array along the central axis of the roller core body (1).

3. The printing roll for printing according to claim 1, wherein: The ventilation branch pipe (45) is provided in multiple sets, and the multiple sets of ventilation branch pipe (45) are arranged at intervals along the axial direction of the ventilation main pipe (44). Each set of ventilation branch pipe (45) is arranged in a ring array along the central axis of the ventilation main pipe (44).

4. The printing roll for printing according to claim 1, wherein: The ejection assembly (9) comprises a rotating ring (91), an ejection block (92), an elastic ejection rod (93) and a poking rod (94), the positioning disc (10) is internally provided with a mounting cavity (14) in communication with the first mounting groove (11), the rotating ring (91) is rotationally arranged in the mounting cavity (14), a second mounting groove (15) is arranged on the circumferential outer wall of the rotating ring (91), the ejection block (92) is movably arranged in the second mounting groove (15), one end of the elastic ejection rod (93) is connected with the ejection block (92), the other end of the elastic ejection rod (93) is connected with the groove wall of the second mounting groove (15), a poking track (16) is arranged on the side of the positioning disc (10) away from the roller core body (1) and in communication with the mounting cavity (14), the poking rod (94) is arranged on the rotating ring (91) and one end of the poking rod (94) away from the rotating ring (91) penetrates and extends out of the poking track (16).

5. A printing roller for printing according to claim 4, characterized in that: One end of the poking rod (94) away from the rotating ring (91) is provided with a gripping plate (17), a telescopic spring (18) is sleeved on the poking rod (94), one end of the telescopic spring (18) is connected with the gripping plate (17), the other end of the telescopic spring (18) is connected with a movable plate (19), the movable plate (19) is slidably sleeved on the poking rod (94), a positioning insertion rod (20) is arranged on the side of the movable plate (19) facing the positioning disc (10), the positioning disc (10) is provided with a positioning insertion hole (21) for the positioning insertion rod (20) to insert.

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