CN217863229U - Flexographic printing machine - Google Patents

Abstract

The utility model discloses a flexographic printing machine is provided with drop feed mechanism, preceding tension mechanism, printing mechanism, back tension mechanism, receiving agencies, drop feed mechanism includes automatic reel change device, automatic coiling and uncoiling device, automatic cutting device, preceding tension mechanism is provided with automatic deviation correcting device, preceding tension control device, printing mechanism is provided with version roller pressure regulating device, axial register device, air-dry device, back tension mechanism is provided with back tension control device, on-line measuring device, and this printing machine degree of automation is higher, can realize the blowing, print, detect, the whole process of rolling, has promoted printing quality, has improved printing efficiency.

Description

Flexographic printing machine

Technical Field

The utility model relates to a printing machine technical field especially relates to a flexographic printing machine.

Background

The flexographic printing machine is a printing device which is widely applied at present, and has the advantages of simple structure, strong material adaptability, small imprinting force, low printing cost, high printing speed, good quality, environmental protection and the like. The common problems of low automation level, low printing efficiency, low printing quality, poor color register precision, low air drying speed and the like of the printing machine in the current market are solved.

Disclosure of Invention

For solving above problem, the application provides a flexographic printing machine is provided with drop feed mechanism, preceding tension mechanism, printing mechanism, back tension mechanism, receiving agencies, drop feed mechanism includes automatic reel change device, automatic coiling and uncoiling device, automatic cutting device, preceding tension mechanism is provided with automatic deviation correcting device, preceding tension control device, printing mechanism is provided with version roller pressure regulating device, axial register device, air-dries the device, back tension mechanism is provided with back tension control device, on-line measuring device.

In one embodiment, the automatic roll changing device comprises a lifting device, a lifting arm is arranged on the lifting device, the lifting arm is horizontally arranged, two sides of the upper end face of the lifting arm are provided with blocking protrusions, one side, close to the turntable, of the lifting arm is provided with a groove, two bearings are arranged in the groove side by side, the upper surfaces of the bearings are flush with the upper surface of the lifting arm, and the advancing direction of the bearings is consistent with the axial direction of the material roll shaft.

In one embodiment, the printing mechanism is provided with an upper machine frame and a lower machine frame, the upper machine frame is provided with a printing bearing roller, an anilox roller and a printing roller, the printing bearing roller, the anilox roller and the printing roller are in gear transmission, the printing roller is positioned above the printing bearing roller and the anilox roller, and the printing roller is respectively tangent to the printing bearing roller and the anilox roller.

In one embodiment, the plate roll pressure adjusting device includes: the supporting unit comprises a first supporting arm, a second supporting arm and a gap fine-tuning unit, and the gap fine-tuning unit is in contact with the supporting unit and is a pressure control unit.

In one embodiment, the pressure control unit comprises sliding devices arranged on the first supporting arm and the second supporting arm and a pressure adjusting wheel arranged on the upper frame, a pressure adjusting connecting rod is arranged in the middle of the pressure adjusting wheel, the pressure adjusting connecting rod penetrates through the upper frame to be connected with a swinging rod, and the swinging rod is hinged to a driving device arranged on the outer side of the upper frame through a connecting shaft.

In one embodiment, the axial alignment device comprises an alignment guide rail arranged between the upper frame and the lower frame, a binocular sensor arranged on the upper frame, and a screw rod arranged on the upper frame, wherein the screw rod is connected with the alignment motor driving device.

In one embodiment, the air drying device is provided with a centrifugal fan, the centrifugal fan is connected with a heating box through a pipeline, the heating box is connected with a blowing box through a pipeline, the blowing box is box-shaped, the bottom of the blowing box is provided with a hot air inlet, and one side of the blowing box is provided with a plurality of horizontally arranged air knives.

In one embodiment, the air knife comprises an air collecting section and a blowing section, one side of the air collecting section is connected with the blowing box, the other side of the air collecting section is connected with the blowing section, and the blowing section is in a flat hollow design.

In one embodiment, the post-tension mechanism comprises a post-tension control device and an online detection device, the online detection device comprises an online detection processor arranged on the wall board, and a detection bracket arranged on the wall board, a detection sliding device is arranged on the detection bracket, and an image pickup device is arranged on the detection sliding device.

The beneficial effects of the utility model reside in that:

the utility model discloses a flexographic printing machine, be provided with drop feed mechanism, preceding tension mechanism, printing mechanism, back tension mechanism, receiving agencies, the drop feed mechanism includes automatic change of lap device, automatic coiling and uncoiling device, automatic cutting device, preceding tension mechanism is provided with automatic deviation correcting device, preceding tension control device, printing mechanism is provided with version roller pressure regulating device, axial alignment device, air-dry device, back tension mechanism is provided with back tension control device, on-line measuring device; the automatic coil changing device is arranged to realize vertical ascending and descending of a large coil of printed matter, the operation safety and the operation efficiency are improved, the automatic coil changing device and the automatic cutting device can realize the functions of winding, unwinding and material changing without stopping, the maximum winding and unwinding diameter reaches 1100mm, the production efficiency is effectively improved, the production consumption is reduced, the printing pressure is adjusted through the roller pressure adjusting device to ensure balanced printing, the axial color register deviation is automatically adjusted through the axial color register device, the color register precision is improved, the stability and the blowing speed of hot air are improved through the air drying device, the drying efficiency and the drying quality of the printed matter are improved, the printed matter after being printed is monitored and fed back to the control center to be adjusted through the online detection device, the material belt after being printed is wound into coils through the material receiving mechanism, the processes of discharging, printing, detecting and winding are finished, the whole set of the printer is high in automation degree, the printing quality is improved, and the printing efficiency is improved.

Drawings

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

FIG. 2 is a cross-sectional view of a drop feed mechanism;

FIG. 3 is a schematic view of a discharging mechanism;

FIG. 4 is a partial view taken at A in FIG. 3;

FIG. 5 is a schematic view of the lifting device;

FIG. 6 is a schematic view of a front tension configuration;

FIG. 7 is a cross-sectional view of the front tension mechanism;

FIG. 8 is a first schematic view of a printing mechanism;

FIG. 9 is a second schematic view of a printing mechanism;

FIG. 10 is a first schematic structural view after the air drying device and the lower frame are removed;

fig. 11 is a front view of the plate roller pressure adjusting device;

FIG. 12 is a partial view of FIG. 11;

FIG. 13 is a side view of the support arm in engagement with the pressure adjustment wheel;

FIG. 14 is a perspective view of the support arm in cooperation with the pressure adjustment wheel;

FIG. 15 is a second schematic structural view after the air drying device and the lower frame are removed;

FIG. 16 is a partial view of FIG. 15;

FIG. 17 is a schematic view of the air drying device after being removed;

FIG. 18 is a partial view of FIG. 17A;

FIG. 19 is a partial view of FIG. 9A;

FIG. 20 is a third schematic view of a printing mechanism;

fig. 21 is a schematic view of a blow box construction;

fig. 22 is a side view of the blow box;

FIG. 23 is a schematic view of a bellows hood in cooperation with a blow box;

FIG. 24 is a schematic view of the tension control mechanism;

FIG. 25 is a schematic diagram of the tension control mechanism after removal of the on-line detection processor;

the symbols in the drawings illustrate that:

1. a discharging mechanism;

11. an automatic reel changer;

111. a lifting device; 1111. a reel change driving motor; 1112. a first steering gear; 1113. a drive shaft; 1114. a second diverter; 1115. a first lead screw; 1116. a second lead screw; 1117. a first lifting guide rail seat; 1118. a lifting shield;

112. a lifting arm; 1121. a blocking projection; 1122. a groove; 1123. a bearing;

113. a slide rail; 1131. a first slide rail;

12. an automatic coiling and uncoiling device; 121. a turntable; 122. a material roll shaft;

13. an automatic cutting device;

2. a front tension mechanism;

21. an automatic deviation rectifying device;

22. a front tension control device; 221. a paper guide roller; 222. a tension bottom roller;

223. a tension rubber roller; 2231. a rubber roller compression bar; 2232. a rubber roller cylinder;

224. a tension sensor;

3. a printing mechanism;

31. an upper frame; 32. a lower frame; 33. a printing roller; 34. an anilox roll;

35. a printing roller; 351. a printing roller fixing disc;

36. a printing roller pressure adjusting device;

361. a support unit; 3611. a first support arm; 3612. a second support arm;

362. a gap fine-tuning unit; 3621. an adjusting seat;

3622. adjusting the screw rod; 36221. a first adjusting screw rod; 36222. a second adjusting screw rod;

3623. adjusting a hand wheel; 36231. a first adjustment handwheel; 36232. a second adjusting hand wheel;

363. a pressure control unit; 3631. a sliding device; 36311. a pulley; 3632. a pressure regulating wheel; 3633. a pressure regulating link; 3634. a swing rod; 3635. a connecting shaft; 3636. a pressure driving device;

37. axial registration means;

371. registering the guide rail;

372. a binocular sensor;

373. a screw;

374. registering the motor drive;

38. an air drying device;

381. a centrifugal fan;

382. a heating box;

383. a blow box; 3831. a hot air inlet;

384. an air knife; 3841. a wind collecting section; 3842. a blowing section;

385. the bellows cover body.

4. A post-tensioning mechanism; 41. a post-tension control device;

42. an online detection device; 421. an online detection processor; 422. detecting the bracket; 423. detecting a sliding device; 424. an image pickup device;

5. a material receiving mechanism;

6. and a control center.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application 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 merely illustrative of the present application and are not intended to limit the present application.

As shown in fig. 1 and 2, a flexographic printing machine is provided with a feeding mechanism 1, a front tension mechanism 2, a printing mechanism 3, a rear tension mechanism 4 and a receiving mechanism 5, wherein the feeding mechanism 1 feeds a large roll of printed matter, the front tension mechanism 2 controls the feeding tension to block tension fluctuation caused by feeding, the printing mechanism 3 prints the material belt, the rear tension mechanism 4 detects the printed material belt and blocks tension fluctuation caused by receiving the material, the receiving mechanism 5 winds the printed material belt into a roll, a control center 6 is further provided, and the control center 6 controls the mechanisms to execute according to preset actions.

The discharging mechanism 1 comprises an automatic roll changing device 11, an automatic roll reeling and unreeling device 12 and an automatic cutting device 13, wherein the automatic roll changing device 11 is used for moving a large roll of printed matters onto the automatic roll reeling and unreeling device 12 or placing the large roll of printed matters on the automatic roll reeling and unreeling device 12 onto the ground or a moving trolley; the automatic winding and unwinding device 12 can realize non-stop reel change by arranging the turntable 121 and the two material roll shafts 122; the automatic cutting device 13 and the automatic winding and unwinding device 12 are matched with each other to cut a large roll of printed matter, and the front winding and the back winding of the printed matter can be realized simultaneously.

As shown in fig. 2 to 5, the automatic roll changing device 11 includes a lifting device 111, a lifting arm 112 is disposed on the lifting device 111, the lifting arm 112 is disposed horizontally, blocking protrusions 1121 are disposed on both sides of an upper end surface of the lifting arm 112, a groove 1122 is disposed on one side of the lifting arm 112 close to the turntable 121, two bearings 1123 are disposed in the groove 1122 side by side, an upper surface of each bearing 1123 is flush with an upper surface of the lifting arm 112, a forward direction of the bearing 1123 is consistent with an axial direction of the roll shaft 122, and when the roll moves onto the turntable 121, the roll can be moved along a rotating direction of the bearing 1123, so that the roll is placed symmetrically left and right; the horizontal arrangement of the lifting arm 112 can ensure that the roll shaft 122 moves back and forth on the lifting arm 112, which facilitates the roll moving to the turntable 121, and the blocking protrusion 1121 can prevent the roll from falling off the lifting arm 112.

In order to ensure that the left side and the right side of the material roll can be lifted and lowered horizontally at the same time, as shown in fig. 1, 2, 3, 4 and 5, the lifting device 111 comprises a roll-changing driving motor 1111, the roll-changing driving motor 1111 is connected with a first steering gear 1112, the first steering gear 1112 is provided with a transmission shaft 1113, the transmission shaft 1113 is horizontally arranged, the transmission shaft 1113 is provided with a second steering gear 1114, the first steering gear 1112 and the second steering gear 1114 are respectively connected with a first screw rod 1115 and a second screw rod 1116, the first screw rod 1115 and the second screw rod 1116 are parallel, the first screw rod 1115 and the second screw rod 1116 are perpendicular to the horizontal plane, the first screw rod 1115 and the second screw rod 1116 are respectively provided with a first lifting guide rail seat 1117 and a second lifting guide rail seat (not shown in the figure), the first lifting guide rail seat 1117 and the second lifting guide rail seat are both provided with a lifting arm 112, and the lifting device 111 is further provided with a lifting shield 1118. When the roll-changing driving motor 1111 rotates, the first steering device 1112 and the second steering device 1114 respectively drive the first lead screw 1115 and the second lead screw 1116 to rotate, and drive the first lifting guide rail base 1117 and the second lifting guide rail base to move up and down, so as to drive the lifting arm 112 to ascend or descend.

As shown in fig. 4 and 5, in order to ensure that the material roll is more stable and firm during the feeding process, a slide rail 113 is further disposed on the printing machine, the slide rail 113 includes a first slide rail 1131 and a second slide rail (not shown in the figure), the first slide rail 1131 and the second slide rail are respectively parallel to the first lead screw 1115 and the second lead screw 1116, and the first lifting guide holder 1117 and the second lifting guide holder are respectively connected to the first slide rail 1131 and the second slide rail.

As shown in fig. 1, 6 and 7, the front tension mechanism 2 has an automatic deviation correcting device 21 and a front tension control device 22 which are arranged on the wall board. The front tension control device 22 comprises a plurality of paper guide rollers 221 arranged on the wallboard, the front tension control device 22 further comprises a tension bottom roller 222, the tension bottom roller 222 is connected with a bottom roller driving motor (not shown in the figure), the bottom roller driving motor drives the tension bottom roller 222 to rotate so as to drive the material belt to advance, a tension rubber roller 223 is arranged on one side of the tension bottom roller 222, the tension rubber roller 223 is connected with a rubber roller pressing rod 2231, one end of the rubber roller pressing rod 2231 is connected with the wallboard, the rubber roller pressing rod 2231 can rotate by taking the original point as the original point, the other end of the rubber roller pressing rod 2232 is hinged with a rubber roller cylinder 2232, the rubber roller cylinder 2232 is positioned above the tension bottom roller 222, and the tail end of the rubber roller cylinder 2232 is connected with the wallboard; when the device is operated, the piston rod of the rubber roller cylinder 2232 can drive the rubber roller press rod 2231 to approach to one side of the tension bottom roller 222 when contracting, so as to drive the tension rubber roller 223 to approach to one side of the tension bottom roller 222, so as to increase the tension of the material belt, the tension control device 21 further comprises a tension sensor 224 arranged on the paper guide roller 221, the tension sensor 224 is electrically connected with the control center 6, when the device is operated, the tension value of the material belt is transmitted to the control center 6, and the control center 6 controls the rotating speed of the bottom roller driving motor, so as to adjust the tension.

As shown in fig. 8 and 9, the printing mechanism 3 is provided with an upper frame 31 and a lower frame 32, the upper frame 31 is provided with a printing roller 33, an anilox roller 34 and a printing roller 35, the printing roller 33, the anilox roller 34 and the printing roller 35 are driven by gears, a printing roller fixing disc 351 is arranged at the shaft end of the printing roller 35, the printing roller 35 is positioned above the printing roller 33 and the anilox roller 34, the printing roller 33 and the anilox roller 34 are fixed on the upper frame 31 and can rotate around a shaft, the printing roller 35 is respectively tangent to the printing roller 33 and the anilox roller 34, and the printing mechanism 3 is provided with a printing roller pressure adjusting device 36, an axial aligning device 37 and an air drying device 38.

As shown in fig. 8, 10, and 11, the plate roller pressure adjusting device 36 includes a supporting unit 361, the supporting unit 361 is located below the plate roller fixing disc 351 for supporting the plate roller 35, the upper frame 31 is further provided with a gap fine-tuning unit 362, the gap fine-tuning unit 362 contacts with the supporting unit 361, the gap fine-tuning unit 362 operates to push the supporting unit 361, the gap between the plate roller 35 and the printing roller 33 and the anilox roller 34 is adjusted by adjusting the supporting unit 361, the upper frame 31 is further provided with a pressure control unit 363, and the pressure control unit 363 adjusts the pressure between the plate roller 35 and the printing roller 33 and the anilox roller 34.

As shown in fig. 9, 10, 11, and 12, the supporting unit 361 includes a first supporting arm 3611 and a second supporting arm 3612, the first supporting arm 3611 and the second supporting arm 3612 are hinged to each other, the first supporting arm 3611 is located between the plate roller fixing plate 351 and the printing roller 33, and the second supporting arm 3612 is located between the anilox roller 34 and the plate roller fixing plate 351.

The gap fine-adjustment unit 362 comprises adjusting seats 3621 arranged on the upper rack 31, adjusting screw rods 3622 are arranged on the adjusting seats 3621, adjusting hand wheels 3623 are arranged on the adjusting screw rods 3622, the number of the adjusting screw rods 3622 is two, the adjusting screw rods are respectively a first adjusting screw rod 36221 and a second adjusting screw rod 36222, the first adjusting screw rod 36221 is in contact with a first support arm 3611, the second adjusting screw rod 36222 is in contact with a second support arm 3612, the number of the adjusting hand wheels 3623 is two, the first adjusting hand wheel 36231 and the second adjusting hand wheel 36232 are respectively, the first adjusting hand wheel 36231 is fixed on the first adjusting screw rod 36221, and the second adjusting hand wheel 36232 is fixed on the second adjusting screw rod 36222. By rotating the adjusting hand wheel 623, screwing in or screwing out the adjusting screw rod 622 for a distance, namely adjusting the positions of the first adjusting screw rod 36221 and the second adjusting screw rod 36222 in the adjusting seat 3621, so as to push the first supporting arm 3611 and the second supporting arm 3612, and adjusting the gap between the plate roller 35 and the printing roller 33 when screwing in the first adjusting screw rod 36221; when the second adjusting screw rod 36222 is screwed in, the gap between the plate roller 35 and the anilox roller 34 is adjusted, and vice versa, so that the distance adjustment is realized, the pressure is adjusted, the first adjusting hand wheel 36231 and the second adjusting hand wheel 36232 are both positioned on the discharge side of the printing machine, the printing quality is observed and adjusted conveniently, the debugging of operators is facilitated, and the adjustment can be performed quickly by one person.

As shown in fig. 9 and 12-16, the pressure control unit 363 includes a sliding device 3631 disposed on the first supporting arm 3611 and the second supporting arm 3612, a pressure adjusting wheel 3632 disposed on the upper frame 31, a groove disposed on the pressure adjusting wheel 3632, the sliding device 3631 is a pulley 36311, the pulley 36311 is disposed on the upper and lower sides of the pressure adjusting wheel 3632, a pressure adjusting link 3633 is disposed in the middle of the pressure adjusting wheel 3632, the pressure adjusting link 3633 passes through the upper frame 31 and is connected to a swinging rod 3634, and the swinging rod 3634 is hinged to a pressure driving device 3636 disposed outside the upper frame 31 through a connecting shaft 3635. And pin shafts are arranged between the pressure adjusting connecting rod 3633 and the pressure adjusting wheel 3632 and between the pressure adjusting connecting rod 3633 and the swinging rod 3634, so that the pressure adjusting connecting rod 3633 is prevented from sliding relative to the pressure adjusting wheel 3632 and the swinging rod 3634. The pressure driving device 3636 acts to drive the swing rod 3634 to move up and down, so as to drive the pressure adjusting connecting rod 3633 to rotate, the pressure adjusting connecting rod 3633 drives the pressure adjusting wheel 3632 to rotate, the pressure driving device 3636 reciprocates to drive the pressure adjusting wheel 3632 to reciprocate, so as to drive the first supporting arm 3611 and the second supporting arm 3612 to move up and down, that is, the pressure adjusting wheel 3632 reciprocates, the pulley 36311 reciprocates on the groove, so as to realize the size of the opening between the first supporting arm 3611 and the second supporting arm 3612, so as to realize the adjustment of the pressure between the printing roller 35 and the anilox roller 34 and the printing roller 33, and the fit gap fine adjustment unit 362 improves the printing quality.

As shown in fig. 17-19, the axial alignment device 37 includes an alignment guide 371 disposed between the upper frame 31 and the lower frame 32, and a dual-eye sensor 372 disposed on the upper frame 31, a screw 373 disposed on the upper frame 31, the screw 373 coupled to a registration motor driving device 374, the registration motor driving device 374 fixed on the lower frame 32, the upper frame 31 coupled to the lower frame 32 via the alignment guide 371, the registration motor driving device 374 driving the screw 373 to rotate to drive the upper frame 31 to reciprocate on the lower frame 32, the dual-eye sensor 372 coupled to the control center 6 and feeding the detected result back to the control center 6, and the control center 6 controlling the operation of the registration motor driving device 374.

As shown in fig. 8 and 20-23, the air drying device 38 is provided with a centrifugal fan 381, the centrifugal fan 381 is connected to a heating box 382 through a pipeline, the heating box 382 is connected to a blowing box 383 through a pipeline, the blowing box 383 is located on a discharging side of the printing mechanism, the blowing box 383 is box-shaped, a hot air inlet 3831 is arranged at the bottom of the blowing box 383, a plurality of horizontally arranged air knives 384 are arranged on one side of the blowing box 383, and an air box housing 385 is arranged outside the blowing box 383.

Specifically, the centrifugal fan 381 is located on one side of the printing machine, an air outlet of the centrifugal fan 381 is connected with an air inlet of the heating box 382, the centrifugal fan 381 blows air into the heating box 382, the heating box 382 heats the blown air, an air outlet of the heating box 382 is connected with a hot air inlet 3831 of the blowing box 383 through a pipeline, hot air heated by the heating box 382 enters the blowing box 383 through the hot air inlet 3831 through the pipeline, the hot air is blown onto a product printed by the printing machine through an air knife 384 horizontally arranged on the blowing box 383 to achieve a quick drying effect, the air knife 384 is perpendicular to the product printed by the printing machine, and the number of the air knives 384 is ten in this embodiment.

As shown in fig. 21 and 22, the air knife 384 includes an air collecting section 3841 and a blowing section 3842, one side of the air collecting section 3841 is connected to the blowing box 383, and the other side is connected to the blowing section 3842, and the blowing section 3842 is designed to be flat and hollow.

Specifically, the hot-blast section 3841 that loops through in the case 383 of blowing, the section 3842 of blowing blows to the printed matter on, because the section 3842 of blowing is the platykurtic, consequently can realize parallel air-out, and the wind that blows out is more even, has improved the stability of air-out, has improved printed matter drying efficiency and oven-dry mass. The blowing section 3842 is flat, increases the blowing speed of the air flow, and further increases the effective distance of the parallel air flow.

As shown in fig. 22, the wind collecting section 3841 is trumpet-shaped, and the opening width of the side close to the blowing box 383 is larger than the opening width of the side close to the blowing section 3842.

Specifically, the width of the opening at the side of the air collecting section 3841 connected with the air blowing box 383 is large, so that enough air in the air blowing box 383 can be blown into the air collecting section 3841, and the width of the opening at the side of the air collecting section 3841 connected with the air outlet section 3842 is small, so that the trumpet-shaped structural design of the air collecting section 3841 can ensure that the hot air blown out from the air blowing box 383 has enough pressure, and the effective distance of the hot air blown out is ensured.

The blow box 383 tapers in width from bottom to top.

Specifically, the width of the bottom of the blowing box 383 is greater than the width of the top, that is, the width of the blowing box 83 gradually decreases along the bottom, because the hot air inlet 831 is located at the bottom of the blowing box 83, when hot air enters the blowing box 83, part of the hot air is blown out by the air knife 84 near the position of the hot air inlet 831, part of the hot air moves upward from the bottom of the blowing box 83 and is blown out by the air knife 84 at the upper part of the blowing box 83, and the width of the blowing box 83 gradually decreases along the bottom, so that the hot air blown out by all the air knives 84 on the blowing box 83 is uniform and uniform.

As shown in fig. 1, 24 and 25, the rear tension mechanism 4 has a rear tension control device 41 and an on-line detection device 42 provided on the wall panel. The online detection device 42 comprises an online detection processor 421 arranged on the wall plate and a detection support 422 arranged on the wall plate, wherein a detection sliding device 423 is arranged on the detection support 422, the detection sliding device 423 can be a sliding guide rail or a sliding screw rod, an image pickup device 424 is arranged on the detection sliding device 423, and the detection sliding device 423 can drive the image pickup device 424 to move back and forth so as to adjust the position of the image pickup device 424; the on-line detection device 42 is further provided with an illumination device (not shown) for providing a light source for the image pick-up device 424 to facilitate the collection of clear images.

When the on-line detection device 42 works, the image pickup device 424 collects images of the material belt and transmits the collected images to the on-line detection processor 421, qualified printed matter images are stored in the on-line detection processor 421 in advance, after the on-line detection processor 421 receives the images transmitted by the image pickup device 424, the received images are compared with the prestored images to determine whether the monitored received images are consistent with the pre-input images, when the images are inconsistent with the pre-input images, the on-line detection processor 421 gives an alarm to remind a worker to adjust, the on-line detection processor 421 can also detect printing registration errors, and outputs registration control signals to quickly adjust and correct printing rollers, so that the registration control signals are consistent with a reference value, registration accuracy is guaranteed, and printing quality is improved.

As shown in fig. 1, the receiving mechanism 5 has the same structure and function as the discharging mechanism 1, that is, the receiving function can be realized while discharging.

The utility model discloses a flexographic printing machine is provided with drop feed mechanism 1, preceding tension mechanism 2, printing mechanism 3, back tension mechanism 4, receiving agencies 5, drop feed mechanism 1 includes automatic reel changing device 11, automatic winding and unwinding device 12, automatic cutting device 13, preceding tension mechanism 2 is provided with automatic deviation correcting device 21, preceding tension control device 22, printing mechanism 3 is provided with version roller pressure regulating device 36, axial register device 37, air-dry device 38, back tension mechanism 4 is provided with back tension control device 41, on-line measuring device 42; the automatic coil changing device 11 is arranged to realize vertical ascending and descending of large-coil printed matters, the operation safety and the operation efficiency are improved, the nonstop coiling, uncoiling and material changing functions can be realized through the automatic coiling and uncoiling device 12 and the automatic cutting device 13, the diameter of the largest coiling and uncoiling reaches 1100mm, the production efficiency is effectively improved, the production consumption is reduced, the printing pressure is adjusted through the plate roller pressure adjusting device 36 to ensure balanced printing, the axial color register deviation is automatically adjusted through the axial color register device 37, the color register precision is improved, the stability and the blowing speed of hot air outlet are improved through the air drying device 38, the drying efficiency and the drying quality of the printed matters are improved, the printed matters are monitored through the online detection device 42 and fed back to the control center 6 for adjustment, the printed material belt is wound into a coil through the material receiving mechanism 5, the whole process of material discharging, printing, detection and coiling is completed, the printing degree of automation of the printer is higher, the printing quality is improved, and the printing efficiency is improved.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through an intermediary, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Claims (9)

1. The utility model provides a flexographic printing machine, is provided with drop feed mechanism, preceding tension mechanism, printing mechanism, back tension mechanism, receiving agencies, its characterized in that: the discharging mechanism comprises an automatic roll changing device, an automatic roll winding and unwinding device and an automatic cutting device, the front tension mechanism is provided with an automatic deviation correcting device and a front tension control device, the printing mechanism is provided with a printing roller pressure adjusting device, an axial aligning device and an air drying device, and the rear tension mechanism is provided with a rear tension control device and an online detection device.

2. A flexographic printing machine according to claim 1, characterized in that: the automatic roll changing device comprises a lifting device, a lifting arm is arranged on the lifting device, the lifting arm is horizontally arranged, two sides of the upper end face of the lifting arm are provided with blocking protrusions, a groove is formed in one side, close to the turntable, of the lifting arm, two bearings are arranged in the groove side by side, the upper surface of each bearing is flush with the upper surface of the lifting arm, and the advancing direction of each bearing is consistent with the axial direction of the material roll shaft.

3. A flexographic printing machine according to claim 1, characterized in that: the printing mechanism is provided with frame and lower frame, be provided with printing roller, reticulation roller, version roller in the frame of going up, through gear drive between printing roller, reticulation roller, the version roller, version roller is located printing roller with reticulation roller top, version roller respectively with printing roller with the reticulation roller is tangent.

4. A flexographic printing machine according to claim 1, characterized in that: version roller pressure adjustment device includes: the supporting unit comprises a first supporting arm, a second supporting arm and a gap fine-tuning unit, and the gap fine-tuning unit is in contact with the supporting unit and is a pressure control unit.

5. The flexographic printing press according to claim 4, wherein: the pressure control unit comprises a sliding device arranged on the first supporting arm and the second supporting arm and a pressure adjusting wheel arranged on the upper rack, wherein a pressure adjusting connecting rod is arranged in the middle of the pressure adjusting wheel and penetrates through the upper rack to be connected with the swing rod, and the swing rod is hinged with a driving device arranged outside the upper rack through a connecting shaft.

6. A flexographic printing machine according to claim 1, characterized in that: the axial registration device comprises a registration guide rail arranged between an upper frame and a lower frame, a double-eye sensor arranged on the upper frame, and a screw rod arranged on the upper frame, wherein the screw rod is connected with a registration motor driving device.

7. A flexographic printing machine according to claim 1, characterized in that: the air-drying device is provided with a centrifugal fan, the centrifugal fan is connected with a heating box through a pipeline, the heating box is connected with a blowing box through a pipeline, the blowing box is box-shaped, the bottom of the blowing box is provided with a hot air inlet, and one side of the blowing box is provided with a plurality of air knives horizontally arranged.

8. The flexographic printing press according to claim 7, wherein: the air knife comprises an air collecting section and a blowing section, one side of the air collecting section is connected with the blowing box, the other side of the air collecting section is connected with the blowing section, and the blowing section is in a flat hollow design.

9. A flexographic printing machine according to claim 1, characterized in that: the post-tension mechanism comprises a post-tension control device and an online detection device, the online detection device comprises an online detection processor arranged on the wallboard and a detection support arranged on the wallboard, a detection sliding device is arranged on the detection support, and an image pickup device is arranged on the detection sliding device.

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