Satellite flexographic printing central cylinder unit

Abstract

The satellite flexographic printing central roller unit comprises a central roller, a central shaft arranged in the central roller, and a first bearing seat fixed to one end of the central shaft; a driving coding assembly is mounted on the side of the first bearing seat away from the central roller, and the driving coding assembly is fixed to the first bearing seat and the central shaft; a second bearing seat is mounted on the other end of the central shaft, and a brake braking assembly is fixed to the side of the second bearing seat away from the central roller; a cooling assembly is mounted at the transverse axis of the central shaft in the central roller, and the cooling assembly extends to the side of the brake braking assembly. The torque motor mounted at the shaft end of the central roller shaft can directly drive the roller, without transmission power loss, and the line speed accuracy of the central roller is improved; the water cooling joint of the central roller can be cooled by cold water to ensure the diameter size of the central roller, and the printing quality is not affected by temperature change.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of printing machinery, and particularly relates to a center roller unit of satellite flexible printing. BACKGROUND

[0002] Flexible printing is printing by using a flexible printing plate and transferring ink through a screen ink roller. During printing, the screen roller uniformly applies an ink layer of a certain thickness to the inked part of the printing plate, and then, under the action of the printing plate roller and the impression roller, the ink layer of the inked part is transferred to the surface of the printing material to form clear graphics and texts.

[0003] In satellite flexible printing, the plate roller part and the screen roller part are distributed around the center roller, and the center roller is the heart of the satellite flexible printing machine. The precision of the control of the center roller affects the quality of the final printed product. Some existing center rollers use gear type driving, and the printing overlay precision is low, which cannot meet the requirements of high-precision printing. Moreover, the gear transmission will be worn during work, and with the passage of time, its precision will gradually deteriorate. At the same time, the printing equipment using two-stage transmission has low motor efficiency and high energy consumption. The diameter size of the commonly used center roller will change slightly during work, which will change the printing pressure and affect the overlay precision of printing, causing ghosting in printing, and ultimately affecting the quality of the printed product. SUMMARY

[0004] The purpose of the present application is to provide a center roller unit of satellite flexible printing, so that the diameter of the center roller remains unchanged during work, and the overlay precision can be improved.

[0005] The technical solution adopted by the present application is that the center roller unit of satellite flexible printing comprises a center roller, a middle shaft is arranged inside the center roller, the two ends of the middle shaft extend and are fixed to the outside of the center roller, a first bearing seat is fixed to one end of the middle shaft, a driving code assembly is installed on the side of the first bearing seat away from the center roller, and the driving code assembly is fixed to the first bearing seat and the middle shaft;

[0006] A second bearing seat is installed at the other end of the middle shaft, and a brake assembly is fixed to the side of the second bearing seat away from the center roller;

[0007] A cooling assembly is installed at the transverse axis of the middle shaft inside the center roller, and the cooling assembly extends to the side of the brake assembly.

[0008] The present application is characterized in that:

[0009] The first bearing and the third bearing are sequentially sleeved outward from the direction close to the center roller on the first bearing seat, and the second bearing is sleeved on the second bearing seat;

[0010] The driving coding assembly comprises a main motor, a first expansion sleeve and a second expansion sleeve are sequentially arranged on the side of the first bearing seat away from the central roller, the outer sleeve of the second expansion sleeve is connected with one end of the main motor, and the other end of the main motor is fixedly connected with the first bearing seat;

[0011] The driving coding assembly further comprises an encoder, the side of the main motor away from the central roller is provided with a mounting plate, and the encoder is fixed on the main motor through the mounting plate; the end of the middle shaft is provided with an encoder fixing shaft, the outer sleeve of the encoder fixing shaft is connected with a first fixing block, and the encoder is fixed on the encoder fixing shaft through the first fixing block;

[0012] The brake assembly comprises a brake disc, a third expansion sleeve is arranged on the side of the second bearing seat away from the central roller, and the brake disc is arranged on the middle shaft through the third expansion sleeve; the end of the brake disc is provided with a butterfly brake, and the butterfly brake is provided with a second fixing block on the side close to the central roller;

[0013] The cooling assembly comprises a water guide groove arranged at the inner transverse axis of the middle shaft;

[0014] The cooling assembly further comprises a water inlet pipe, the water inlet pipe is arranged on the side of the brake disc away from the central roller, one end of the water inlet pipe is connected with a rotary joint penetrating through the brake disc, and the other end of the water inlet pipe is connected with the water guide groove;

[0015] The water guide groove is provided with a first water inlet and a second water inlet on the side close to the brake assembly, and the first water inlet and the second water inlet are symmetrically arranged; the water guide groove is provided with a third water inlet and a fourth water inlet on the side close to the driving coding assembly, and the third water inlet and the fourth water inlet are symmetrically arranged;

[0016] The cooling assembly further comprises a first water inlet and a first water outlet symmetrically arranged at the top end of the central roller; the cooling assembly further comprises a second water inlet and a second water outlet symmetrically arranged at the bottom end of the central roller;

[0017] The cooling assembly further comprises a first cooling pipe, one end of the first cooling pipe is connected with the first water outlet, and the other end of the first cooling pipe is connected with the first water inlet of the water guide groove;

[0018] The cooling assembly further comprises a second cooling pipe, one end of the second cooling pipe is connected with the first water inlet, and the other end of the second cooling pipe is connected with the third water inlet of the water guide groove;

[0019] The cooling assembly further comprises a third cooling pipe, one end of the third cooling pipe is connected with the second water inlet, and the other end of the third cooling pipe is connected with the fourth water inlet;

[0020] The cooling assembly further comprises a fourth cooling pipe, one end of the fourth cooling pipe is connected with the second water outlet, and the other end of the fourth cooling pipe is connected with the second water inlet.

[0021] The beneficial effect of the present application is that the torque motor installed at the shaft end of the central roller can directly drive the roller, without power transmission loss, improving the linear speed accuracy of the central roller. The high-precision encoder on the shaft end surface of the central roller can accurately control the linear speed of the roller, improving the printing quality. The water-cooled joint of the central roller can pass cold water for cooling to ensure the diameter size of the central roller, and the printing quality will not be affected by the change of environmental temperature. The central roller shaft end is provided with a driving brake, which can be used for emergency braking and rapid shutdown in case of unexpected situation. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is the overall cross-sectional structure schematic diagram of the central roller unit of the satellite type flexographic printing of the present application;

[0023] Figure 2 is the cross-sectional structure schematic diagram of the driving and coding assembly of the central roller unit of the satellite type flexographic printing of the present application;

[0024] Figure 3 is the cross-sectional structure schematic diagram of the brake assembly of the central roller unit of the satellite type flexographic printing of the present application.

[0025] In the figure, 1. first fixed block, 2. encoder, 3. mounting plate, 4. main motor, 501. first expansion sleeve, 502. second expansion sleeve, 6. first bearing seat, 701. first bearing, 702. second bearing, 801. third bearing, 9. central roller, 101. first cooling pipe, 102. second cooling pipe, 103. third cooling pipe, 104. fourth cooling pipe, 11. second bearing seat, 12. brake disc, 13. water inlet pipe, 14. rotary joint, 15. butterfly brake, 16. encoder fixing shaft, 17. third expansion sleeve, 18. middle shaft, 19. second fixed block, 201. first backwater outlet, 202. first water inlet, 203. second water inlet, 204. second backwater outlet, 21. water guide groove, 221. first water passage, 222. second water passage, 223. third water passage, 224. fourth water passage. DETAILED DESCRIPTION

[0026] The present application will be described in detail below in combination with the drawings and specific embodiments.

[0027] The structure of the central roller unit of the satellite type flexographic printing of the present application is shown in Figure 1 The structure of the central roller unit of the satellite type flexographic printing of the present application is shown in

[0028] A second bearing seat 11 is installed at the other end of the central shaft 18, and a brake assembly is fixed on the side of the central shaft 18 away from the central roller 9.

[0029] The central shaft 18 is equipped with a cooling assembly located on the transverse axis inside the central roller 9. The cooling assembly extends to one side of the brake assembly, which can brake and stop the machine quickly in case of an emergency.

[0030] The central roller unit of the satellite flexographic printing of this invention is further characterized by:

[0031] The first bearing housing 6 is fitted with a first bearing 701 and a third bearing 801 in sequence from the direction closest to the central roller 9 outwards, and the second bearing housing 11 is fitted with a second bearing 702. The bearing housing can better realize the transmission effect of the motor.

[0032] The drive encoder assembly includes a main motor 4. A first tension sleeve 501 and a second tension sleeve 502 are sequentially installed on the side of the first bearing seat 6 away from the central roller 9. One end of the main motor 4 is sleeved on the outside of the second tension sleeve 502, and the other end of the main motor 4 is fixedly connected to the first bearing seat 6. The tension sleeve can make the connection between the bearing seat 6 and the main motor 4 more stable and prevent accidental detachment during operation.

[0033] The drive encoding assembly also includes an encoder 2. A mounting plate 3 is provided on the side of the main motor 4 away from the central roller 9. The encoder 2 is fixed to the main motor 4 through the mounting plate 3. An encoder fixing shaft 16 is installed at the end of the central shaft 18. A first fixing block 1 is sleeved on the outside of the encoder fixing shaft 16. The encoder 2 is also fixed to the encoder fixing shaft 16 through the first fixing block 1. The encoder 2 can detect the speed and position of the main motor 4 in real time, so that it outputs the speed and position most suitable for the working requirements.

[0034] The brake assembly includes a brake disc 12, a central shaft 18 with a third expansion sleeve 17 mounted on the side of the second bearing seat 11 away from the central roller 9, and the brake disc 12 mounted on the central shaft 18 via the third expansion sleeve 17; a disc brake 15 is provided at the end of the brake disc 12, and a second fixing block 19 is mounted on the side of the disc brake 15 near the central roller 9. By fixing the disc brake 15 to the outside, it can achieve a better braking effect.

[0035] The cooling assembly includes a water guide channel 21, which is located at the inner transverse axis of the central shaft 18;

[0036] The cooling assembly further comprises a water inlet pipe 13 located on the side of the brake disc 12 away from the center roller 9, one end of the water inlet pipe 13 is connected with a rotary joint 14 penetrating through the brake disc 12, and the other end of the water inlet pipe 13 is connected with a water guide groove 21; the rotary joint 14, the water inlet pipe 13 and the water guide groove 21 work cooperatively to ensure that the cooling water flows in and out of the center roller 9 smoothly;

[0037] The water guide groove 21 is provided with a first water outlet 221 and a second water outlet 222 on the side close to the brake assembly, and the first water outlet 221 and the second water outlet 222 are symmetrically arranged above and below; the water guide groove 21 is provided with a third water outlet 223 and a fourth water outlet 224 on the side close to the driving coding assembly, and the third water outlet 223 and the fourth water outlet 224 are symmetrically arranged above and below; the four water outlets are arranged to enable water to flow in and out;

[0038] The cooling assembly further comprises a first water inlet 202 and a first water outlet 201 symmetrically arranged at the top end of the center roller 9; the cooling assembly further comprises a second water inlet 203 and a second water outlet 204 symmetrically arranged at the bottom end of the center roller 9; the arranged water inlets and water outlets help to complete the cooling cycle of water inlet and water outlet;

[0039] The cooling assembly further comprises a first cooling pipe 101, one end of the first cooling pipe 101 is connected with the first water outlet 201, and the other end of the first cooling pipe 101 is connected with the first water outlet 221 of the water guide groove 21;

[0040] The cooling assembly further comprises a second cooling pipe 102, one end of the second cooling pipe 102 is connected with the first water inlet 202, and the other end of the second cooling pipe 102 is connected with the third water outlet 223 of the water guide groove 21;

[0041] The cooling assembly further comprises a third cooling pipe 103, one end of the third cooling pipe 103 is connected with the second water inlet 203, and the other end of the third cooling pipe 103 is connected with the fourth water outlet 224;

[0042] The cooling assembly further comprises a fourth cooling pipe 104, one end of the fourth cooling pipe 104 is connected with the second water outlet 204, and the other end of the fourth cooling pipe 104 is connected with the second water outlet 222; in this way, the cooling water circulation system with four inlets and four outlets can maximize the cooling effect.

[0043] The working principle of the center roller unit of the satellite type flexographic printing of the application is as follows:

[0044] When printing, the rotor of the main motor 4 drives the rotation of the central roller 9, the rotation position of the central roller 9 is fed back to the main machine by the encoder 2, and the rotation position of the central roller 9 is accurately controlled through continuous feedback adjustment. During rotation, cooling water enters the center roller 9 interlayer through the rotating joint 14 and the water inlet pipe 13 and the second cooling pipe 102 and the third cooling pipe 103, the cooling water flows in the spiral interlayer, and then flows back to the water cooling machine from the water guide groove 21 through the first cooling pipe 101 and the fourth cooling pipe 104, taking away the heat on the surface of the central roller 9, so that the diameter of the central roller 9 does not change, ensuring the quality of the overprint.

[0045] When the central roller 9 needs to be braked urgently, the butterfly brake 15 will tightly hold the brake disc 12, forcing the central roller 9 to slow down until the central roller 9 stops.

Claims

1. A central roll unit for satellite flexographic printing, characterized in that The center roller (9) is internally provided with a middle shaft (18), the two ends of the middle shaft (18) are fixedly extended to the outside of the center roller (9), one end of the middle shaft (18) is fixedly provided with a first bearing seat (6), a driving coding assembly is installed on the side of the first bearing seat (6) away from the center roller (9), and the driving coding assembly is fixed on the first bearing seat (6) and the middle shaft (18); The other end of the middle shaft (18) is installed with a second bearing seat (11), and the middle shaft (18) is fixedly provided with a brake braking assembly on the side of the second bearing seat (11) away from the center roller (9); The middle shaft (18) is installed with a cooling assembly at the transverse axis in the center roller (9), and the cooling assembly extends to one side of the brake braking assembly; The driving coding assembly comprises a main motor (4), the middle shaft (18) is sequentially provided with a first expansion sleeve (501) and a second expansion sleeve (502) on the side of the first bearing seat (6) away from the center roller (9), one end of the main motor (4) is sleeved with the outside of the second expansion sleeve (502), and the other end of the main motor (4) is fixedly connected with the first bearing seat (6); The driving coding assembly further comprises an encoder (2), the side of the main motor (4) away from the center roller (9) is provided with a mounting plate (3), the encoder (2) is fixed on the main motor (4) through the mounting plate (3); the end of the middle shaft (18) is installed with an encoder fixing shaft (16), the outside of the encoder fixing shaft (16) is sleeved with a first fixing block (1), and the encoder (2) is further fixed on the encoder fixing shaft (16) through the first fixing block (1); The brake braking assembly comprises a brake disc (12), the middle shaft (18) is installed with a third expansion sleeve (17) on the side of the second bearing seat (11) away from the center roller (9), and the brake disc (12) is installed on the middle shaft (18) through the third expansion sleeve (17); the end of the brake disc (12) is provided with a butterfly brake (15), and the butterfly brake (15) is installed with a second fixing block (19) on the side close to the center roller (9); The cooling assembly comprises a water guide groove (21), and the water guide groove (21) is arranged at the transverse axis in the middle shaft (18); The cooling assembly further comprises a water inlet pipe (13), the water inlet pipe (13) is located on the side of the brake disc (12) away from the center roller (9), one end of the water inlet pipe (13) is connected with a rotary joint (14) penetrating through the brake disc (12), and the other end of the water inlet pipe (13) is connected with the water guide groove (21); The cooling assembly further comprises a first cooling pipe (101), one end of the first cooling pipe (101) is connected with a first water return port (201), and the other end of the first cooling pipe (101) is connected with a first water inlet port (221) of the water guide groove (21). The cooling assembly further comprises a second cooling pipe (102), one end of the second cooling pipe (102) is connected with the first water inlet (202), the other end of the second cooling pipe (102) is connected with the third water outlet (223) of the water guide groove (21); The cooling assembly further comprises a third cooling pipe (103), one end of the third cooling pipe (103) is connected with the second water inlet (203), the other end of the third cooling pipe (103) is connected with the fourth water outlet (224); The cooling assembly further comprises a fourth cooling pipe (104), one end of the fourth cooling pipe (104) is connected with the second water outlet (204), the other end of the fourth cooling pipe (104) is connected with the second water outlet (222); The cooling assembly further comprises the first water outlet (201) and the first water inlet (202) which are symmetrically arranged at the top end inside the central roller (9); the cooling assembly further comprises the second water inlet (203) and the second water outlet (204) which are symmetrically arranged at the bottom end inside the central roller (9).

2. Satellite flexographic central roll unit according to claim 1, characterized in that The first bearing seat (6) is sequentially sleeved with the first bearing (701) and the third bearing (801) from the direction close to the central roller (9), and the second bearing seat (11) is sleeved with the second bearing (702).

3. The satellite flexographic central roll unit of claim 1, wherein, The water guide groove (21) is provided with the first water outlet (221) and the second water outlet (222) on the side close to the brake assembly, the first water outlet (221) and the second water outlet (222) are symmetrically arranged; the water guide groove (21) is provided with the third water outlet (223) and the fourth water outlet (224) on the side close to the driving coding assembly, the third water outlet (223) and the fourth water outlet (224) are symmetrically arranged.

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