Printing roller cooling device, cooling method and printing machine

Abstract

The invention relates to the technical field of printing equipment, and discloses a printing roller cooling device which comprises an air cooling roller seat, and the air cooling roller seat is sequentially provided with a power paper passing roller, a paper passing roller and a power puller roller in the feeding direction of a printing base material. The LED drying lamp is connected to the air cooling roller seat, is arranged on one side of the power paper passing roller, and is used for drying the printing ink on the printing base material; the cold air pipe is connected to the air cooling roller seat and arranged on the other side of the power paper passing roller, a plurality of small cold air exhaust holes are formed in the surface of the cold air pipe and used for conveying cold air to the roller surface of the power paper passing roller, and the cold air pipe is connected with an air cooler. Cold air is discharged from the small holes in the surface of the cold air pipe and transmitted to the roller surface of the power paper passing roller, so that the surface of the power paper passing roller is cooled, the cooled power paper passing roller makes contact with a printing base material to cool the printing base material, and it is guaranteed that the printing base material is not affected by the temperature generated by the LED drying lamp in the printing process; and the effects of instantly curing the printing ink and ensuring the accurate printing position can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of printing equipment, and more specifically, to a printing roller cooling device, a cooling method and a printing press. Background Art

[0002] A printing press is a device used to print on the surface of paper, textiles, plastics and other materials. In order to ensure that the printed products are quickly cured during the production process, the printed products must be dried by drying equipment to facilitate subsequent processing, packaging and delivery. As a drying device, LED drying lamps can generate heat to quickly cure the ink on the printed substrate; at the same time, the heat generated by LED drying lamps will cause the printed materials to stretch, affecting the accuracy of the printing position, thereby affecting the quality of the printed products.

[0003] Therefore, it is necessary to provide a printing roller cooling device, cooling method and printing machine to at least partially solve the problems existing in the prior art, so as to achieve the effect of instantaneously solidifying the printing ink and ensuring accurate printing registration. Summary of the invention

[0004] A series of simplified concepts are introduced in the Summary of the Invention, which will be further described in detail in the Detailed Description of the Invention. The Summary of the Invention does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the scope of protection of the claimed technical solution.

[0005] In order to at least partially solve the above problems, the present invention provides a printing roller cooling device, comprising:

[0006] An air-cooled roller seat is provided with a power paper feed roller, a paper feed roller and a power pull head roller in sequence along the feeding direction of the printing substrate;

[0007] LED drying lamp, which is connected to the air-cooled roller seat and arranged on one side of the power paper feed roller, is used to dry the ink on the printed substrate;

[0008] The cold air duct is connected to the air cooling roller seat and is arranged on the other side of the powered paper feeding roller. A number of cold air exhaust holes are arranged on the surface of the cold air duct to transport cold air to the roller surface of the powered paper feeding roller. The cold air duct is connected to the cold air blower.

[0009] Preferably, the height of the paper feeding roller is lower than that of the powered paper feeding roller and the powered pulling head roller, and after the printed substrate surrounds the powered paper feeding roller, an air cooling space is formed on the side close to the cold air duct.

[0010] Preferably, the number of cold air ducts is set to two, and the two cold air ducts are arranged up and down to convey cold air to the upper and lower parts of the side of the powered paper feeding roller.

[0011] Preferably, the printing roller cooling device further includes: a servo motor, which is installed on the outside of the air-cooled roller seat, and the output end of the servo motor is connected to a reducer, and the output end of the reducer is connected to one end of the power pulling head roller shaft through a coupling.

[0012] Preferably, the printing roller cooling device further includes: a synchronous belt assembly, the synchronous belt assembly includes: a pulley, a synchronous belt and a synchronous belt tensioning mechanism, the two pulleys are respectively connected to the power pulling head roller shaft and the power paper feeding roller shaft; the synchronous belt is arranged around the two pulleys; the synchronous belt tensioning mechanism is arranged on the outside of the synchronous belt, and a tensioning wheel is provided at the output end of the synchronous belt tensioning mechanism, the tensioning wheel is crimped onto the synchronous belt, and the tensioning force of the tensioning wheel on the synchronous belt can be adjusted.

[0013] Preferably, the printing roller cooling device further comprises: a paper pressing roller mechanism, the paper pressing roller mechanism comprising:

[0014] A paper pressing roller frame, one end of which is rotatably connected to an air-cooled roller seat, and the other end of which is connected to a roller;

[0015] A paper pressing roller is installed on the paper pressing roller frame and is located above the power pull head roller. A pressing channel is formed between the paper pressing roller and the power pull head roller for the printing substrate to pass through.

[0016] A spring seat, which is connected to the inner wall of the air-cooled roller seat and is located above one end of the paper pressing roller frame close to the roller;

[0017] A spring is connected between a spring seat and a paper pressing roller frame.

[0018] Preferably, the paper pressing roller mechanism further comprises:

[0019] Cylinders: two groups of cylinders are symmetrically arranged on the outside of the air-cooled roller seat, and the two groups of cylinders act synchronously;

[0020] A connecting rod, one end of which is connected to the output end of the cylinder, and the other end is connected to a rotating block, the rotating block is rotatably connected to the side wall of the air-cooled roller seat, a notch is arranged on the rotating block, and the roller is rotatably arranged on the rotating block.

[0021] Preferably, the LED drying lamp is provided with a lampshade with an opening at the bottom end, the lampshade is buckled on the outside of the powered paper feeding roller, and a gap is formed between the edge of the lampshade and the powered paper feeding roller for the printed substrate to pass through.

[0022] Preferably, the powered paper feeding roller is evenly provided with a plurality of air inlets along the circumferential direction, and the air inlets include:

[0023] A guide ball is arranged in the air inlet, the diameter of the guide ball is smaller than the diameter of the air inlet, one side of the guide ball abuts against the inner wall of the air inlet, and a gap is arranged between the other side of the guide ball and the inner wall of the air inlet;

[0024] An arc-shaped notch is arranged at one end of the guide ball close to the outside of the air inlet;

[0025] A flow guide passage is provided in the flow guide ball and is arranged in an arc shape, one end of the flow guide passage is connected with the arc-shaped gap, and the other end passes through an end of the flow guide ball close to the inner side of the air inlet;

[0026] A return spring, the return spring is connected to the inner wall of the air inlet and is located in the gap between the guide ball and the air inlet;

[0027] A reset block, which is connected to the end of the reset spring and is connected to the guide ball;

[0028] A connecting rope, one end of which is connected to the inner edge of the air inlet, and the other end is connected to the guide ball.

[0029] Preferably, the powered paper feed roller further comprises:

[0030] A first baffle, the first baffle is hinged to the inner wall of the powered paper feeding roller, a plurality of first baffles are evenly arranged along the circumferential direction of the inner wall of the powered paper feeding roller, and the air inlet is located between adjacent first baffles;

[0031] An elastic member connected between the first side of the first baffle and the inner wall of the power paper feeding roller;

[0032] A second baffle, the second baffle is hinged to an end of the first baffle away from the powered paper feeding roller, and an end of the second baffle abuts against a second side of the adjacent first baffle;

[0033] Conical holes, a plurality of conical holes are arranged on the first baffle plate, and the diameter of one end of the conical hole close to the inner wall of the power paper feeding roller is larger than the diameter of the other end;

[0034] The exhaust hole is arranged at the end of the power paper feeding roller.

[0035] Preferably, the powered paper feed roller further comprises:

[0036] The end plate is rotatably arranged on the side of the power paper-feeding roller away from the pulley, the end plate is installed on the air-cooled roller seat, and the end plate shaft is connected to the output end of the motor, and the end plate and the power paper-feeding roller move at a differential speed;

[0037] A plurality of triangle plates are evenly connected to the end plate, and the triangle plates are located in the power paper feeding roller, the first baffle plate is pressed on the first side of the triangle plate, and the second baffle plate hinged on the first baffle plate is pressed on the second side of the adjacent triangle plate.

[0038] Preferably, a printing roller cooling method adopts the above-mentioned printing roller cooling device, characterized in that the specific method is:

[0039] The cold air blower inputs cold air into the cold air duct, and the cold air passes through several cold air exhaust holes on the surface of the cold air duct and is discharged to the roller surface of the powered paper feed roller to cool its surface. The cooled powered paper feed roller contacts the printing substrate to cool it down.

[0040] Preferably, a printing press is provided with the printing roller cooling device described above.

[0041] Compared with the prior art, the present invention has at least the following beneficial effects:

[0042] The present invention provides a printing roller cooling device, which uses a powered pulling roller to pull the printing substrate to make intermittent movements, and an LED drying lamp irradiates the ink on the printing substrate to solidify it. At the same time, the cold air output by the cold air machine is connected to the cold air duct, and the cold air is discharged from the small holes on the surface of the cold air duct and transferred to the roller surface of the powered paper feeding roller to cool down the surface. The cooled powered paper feeding roller contacts the printing substrate to cool it down, ensuring that the printing substrate is not affected by the temperature generated by the LED drying lamp during the printing process, achieving the effect of instantly solidifying the printing ink and ensuring accurate printing position.

[0043] The present invention also provides a printing roller cooling method, which has the technical effect of the above-mentioned printing roller cooling device.

[0044] The present invention also provides a printing machine having the technical effect of the above-mentioned printing roller cooling device.

[0045] The printing roller cooling device, cooling method and printing machine described in the present invention, other advantages, objectives and features of the present invention will be reflected in part through the following description, and in part will be understood by technicians in this field through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0047] Figure 1 It is a structural schematic diagram of the present invention;

[0048] Figure 2 It is a front view of the present invention;

[0049] Figure 3 For the present invention Figure 2 Schematic diagram of the cross-sectional structure along the A direction;

[0050] Figure 4 is a side view of the present invention;

[0051] Figure 5 For the present invention Figure 1 A schematic diagram of the local enlarged structure at C in the middle;

[0052] Figure 6 It is a schematic diagram of the cross-sectional structure of the roller wall of the power paper feeding roller in the present invention;

[0053] Figure 7 It is a schematic diagram of the internal structure of the power paper feeding roller in the present invention;

[0054] Figure 8 It is a schematic cross-sectional structure diagram of the power paper feeding roller in the present invention;

[0055] Fig. 9 is a schematic diagram of the cross-sectional structure of the first baffle in the present invention;

[0056] Fig.10 For the present invention Figure 6 Schematic diagram of the local enlarged structure at point B in the middle.

[0057] In the figure: 1. air-cooled roller seat; 2. printing substrate; 3. powered paper feed roller; 4. paper feed roller; 5. powered pull head roller; 6. LED drying lamp; 7. cold air duct; 8. servo motor; 9. reducer; 10. coupling; 11. pulley; 12. synchronous belt; 13. synchronous belt tensioning mechanism; 14. tensioning wheel; 15. paper pressing roller frame; 16. rotating block; 17. paper pressing roller; 18. spring seat; 19. spring; 20. cylinder; 21. connecting rod; 22. lampshade; 31. air inlet; 32. guide ball; 33. arc-shaped notch; 34. guide passage; 35. reset spring; 36. reset block; 37. connecting rope; 41. first baffle; 42. elastic member; 43. second baffle; 44. end plate; 45. triangular plate; 46. conical hole. DETAILED DESCRIPTION

[0058] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments so that those skilled in the art can implement the invention with reference to the description.

[0059] It should be understood that terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0060] Embodiment 1:

[0061] like Figure 1-5 As shown, the present invention provides a printing roller cooling device, comprising:

[0062] An air-cooled roller seat 1 is provided with a powered paper feed roller 3, a paper feed roller 4 and a powered pull head roller 5 in sequence along a feeding direction of a printing substrate 2;

[0063] LED drying lamp 6, LED drying lamp 6 is connected to the air-cooled roller seat 1 and is arranged on one side of the power paper feeding roller 3, and is used for drying the ink on the printing substrate 2;

[0064] The cold air duct 7 is connected to the air cooling roller seat 1 and is arranged on the other side of the powered paper feeding roller 3. A plurality of cold air exhaust holes are arranged on the surface of the cold air duct 7 for conveying cold air to the roller surface of the powered paper feeding roller 3. The cold air duct 7 is connected to the cold air blower.

[0065] The working principle and beneficial effects of the above technical solution are:

[0066] A printing roller cooling device, when in use, the printing substrate 2 surrounds the power paper feed roller 3, the paper feed roller 4 and the power pull head roller 5 in sequence along the feeding direction, and an LED drying lamp 6 is obliquely arranged above one side of the power paper feed roller 3, and the irradiation surface of the LED drying lamp 6 corresponds to the contact surface between the printing substrate 2 and the power paper feed roller 3; an air cooling pipe 7 is arranged on the other side of the power paper feed roller 3. The power pull head roller 5 pulls the printing substrate 2 to make intermittent movements, and the LED drying lamp 6 irradiates the ink on the printing substrate 2 to solidify it. At the same time, the cold air output by the cold air machine is connected to the cold air pipe 7, and the cold air is discharged from the small holes on the surface of the cold air pipe 7 and transferred to the roller surface of the power paper feed roller 3 to cool down its surface. After cooling, the power paper feed roller 3 contacts the printing substrate 2 to cool it down, ensuring that the printing substrate 2 is not affected by the temperature generated by the LED drying lamp 6 during the printing process, achieving the effect of instantaneous solidification of the printing ink and ensuring accurate printing position.

[0067] Embodiment 2:

[0068] like Figure 1-5 As shown, based on the above embodiment 1, the height of the paper feed roller 4 is lower than the powered paper feed roller 3 and the powered pulling head roller 5. After the printed substrate 2 surrounds the powered paper feed roller 3, an air cooling space is formed on the side close to the cold air duct 7.

[0069] The two cold air ducts 7 are arranged up and down, and are used to convey cold air to the upper and lower parts of the side of the powered paper feeding roller 3 .

[0070] The working principle and beneficial effects of the above technical solution are:

[0071] The powered paper-feeding roller 3 guides the printing substrate 2. After the printing substrate 2 surrounds the powered paper-feeding roller 3, an air-cooling space is formed on the side close to the cold air duct 7. Two cold air ducts 7 are arranged in the air-cooling space, which can surround the cold air transported by the cold air duct 7, so that the cold air repeatedly contacts the powered paper-feeding roller 3, thereby improving the cooling effect on the powered paper-feeding roller 3, and further improving the cooling effect on the printing substrate 2.

[0072] Embodiment 3:

[0073] like Figure 1-5As shown, based on the above-mentioned embodiment 1, the printing roller cooling device is characterized in that it also includes: a servo motor 8, the servo motor 8 is installed on the outside of the air-cooled roller seat 1, the output end of the servo motor 8 is connected to a reducer 9, and the output end of the reducer 9 is connected to one end of the rotating shaft of the power pulling head roller 5 through a coupling 10.

[0074] The printing roller cooling device also includes: a synchronous belt assembly, the synchronous belt assembly includes: a pulley 11, a synchronous belt 12 and a synchronous belt tensioning mechanism 13, the two pulleys 11 are respectively connected to the rotating shaft of the power pulling head roller 5 and the rotating shaft of the power paper feeding roller 3; the synchronous belt 12 is arranged around the two pulleys 11; the synchronous belt tensioning mechanism 13 is arranged on the outside of the synchronous belt 12, and a tensioning wheel 14 is provided at the output end of the synchronous belt tensioning mechanism 13, the tensioning wheel 14 is crimped on the synchronous belt 12, and the tensioning force of the tensioning wheel 14 on the synchronous belt 12 can be adjusted.

[0075] The working principle and beneficial effects of the above technical solution are:

[0076] When the device is in use, the servo motor 8 provides rotational power to control the rotation direction. The servo motor 8 drives the reducer 9, the reducer 9 drives the coupling 10, the coupling 10 drives the power pulling head roller 5, the rotating shaft of the power pulling head roller 5 drives a pulley 11 to rotate, and drives another pulley 11 to rotate through the synchronous belt 12, thereby driving the power paper feeding roller 3 to rotate synchronously; by adjusting the position of the tensioning wheel 14 on the synchronous belt tensioning mechanism 13, the synchronous belt 12 is tensioned to ensure a more accurate transmission process.

[0077] Through the above structural design, a servo motor 8 is used as a power source, and the power pulling head roller 5 drives the power paper feeding roller 3 to move synchronously through the synchronous belt assembly. The printing substrate 2 is driven by the power pulling head roller 5 to move intermittently, thereby realizing intermittent feeding of the printing substrate 2.

[0078] Embodiment 4:

[0079] like Figure 1-5 As shown, based on the above-mentioned embodiment 1, the printing roller cooling device further includes: a paper pressing roller mechanism, the paper pressing roller mechanism includes:

[0080] A paper pressing roller frame 15, one end of which is rotatably connected to the air-cooled roller seat 1, and the other end of which is connected to a roller;

[0081] A press roller 17, which is mounted on the press roller frame 15 and is located above the power pull head roller 5, and a press channel is formed between the press roller 17 and the power pull head roller 5 for the printing substrate 2 to pass through;

[0082] A spring seat 18, the spring seat 18 is connected to the inner wall of the air-cooled roller seat 1 and is located above one end of the paper pressing roller frame 15 close to the roller;

[0083] Spring 19, spring 19 is connected between spring seat 18 and paper pressing roller frame 15;

[0084] Cylinders 20, two groups of cylinders 20 are symmetrically arranged on the outside of the air-cooled roller seat 1, and the two groups of cylinders 20 act synchronously;

[0085] A connecting rod 21, one end of the connecting rod 21 is connected to the output end of the cylinder 20, and the other end is connected to the rotating block 16, the rotating block 16 is rotatably connected to the side wall of the air-cooled roller seat 1, and a notch is set on the rotating block 16, and the roller is rotatably set on the rotating block 16.

[0086] The working principle and beneficial effects of the above technical solution are:

[0087] When the printing substrate 2 is fed, the output end of the cylinder 20 is started to move, and the rotating block 16 is rotated through the connecting rod 21, so that the notch of the rotating block 16 rotates upward. Under the elastic force of the spring 19, the roller keeps in contact with the notch above the rotating block 16, so that the height of one end of the paper pressing roller frame 15 where the roller is set is reduced, and the paper pressing roller 19 is lowered accordingly, and the gap of the pressing channel is reduced, and the paper pressing roller 17 applies pressure to the printing substrate 2 and presses it stably.

[0088] When the printing substrate 2 passes through the powered pulling head roller 5, the cylinder 20 is started to move in the reverse direction, so that the roller contacts the part of the rotating block 16 where no notch is set, so that the height of one end of the paper pressing roller frame 15 where the roller is set rises, and the paper pressing roller 19 rises accordingly, and the gap of the pressing channel increases, so that the printing substrate 2 is in a de-pressurized state.

[0089] During operation of the equipment, the compression amount of the spring 19 can be adjusted through the spring seat 18, thereby adjusting the size of the pressing force of the printing substrate 2 on the power pulling head roller; when the compression amount of the spring 19 is adjusted, it can be adjusted by adjusting the height of the spring seat 18, or adjusting the position of the end of the spring 19 in the spring seat 18.

[0090] Embodiment 5:

[0091] like Figure 1-5 As shown, based on the above-mentioned embodiment 1, the LED drying lamp 6 is provided with a lampshade 22 with an opening at the bottom, the lampshade 22 is buckled on the outside of the powered paper feed roller 3, and a gap is formed between the edge of the lampshade 21 and the powered paper feed roller 3 for the printing substrate 2 to pass through.

[0092] The working principle and beneficial effects of the above technical solution are:

[0093] When the LED drying lamp 6 is in use, the lampshade 22 is buckled onto the outside of the powered paper feed roller 3, the ink printing position of the printing substrate 2 is surrounded inside the lampshade 22, and the LED drying lamp 6 is turned on to cure the ink on the printing substrate 2; the setting of the lampshade 22 can make the heat provided by the LED drying lamp 6 more concentrated and the curing faster.

[0094] Embodiment 6:

[0095] like Figure 6 , 10 As shown, based on the above embodiment 1, the power paper feeding roller 3 is evenly provided with a plurality of air inlets 31 along the circumferential direction, and the air inlets 31 include:

[0096] A guide ball 32 is disposed in the air inlet 31. The diameter of the guide ball 32 is smaller than the diameter of the air inlet 31. One side of the guide ball 32 abuts against the inner wall of the air inlet 31, and a gap is provided between the other side of the guide ball 32 and the inner wall of the air inlet 31.

[0097] An arc-shaped notch 33, which is disposed at one end of the guide ball 32 close to the outside of the air inlet 31;

[0098] The diversion passage 34 is disposed in the diversion ball 32 and is arranged in an arc shape. One end of the diversion passage 34 is connected to the arc-shaped notch 33 and the other end passes through an end of the diversion ball 32 close to the inner side of the air inlet 31.

[0099] A return spring 35, which is connected to the inner wall of the air inlet 32 ​​and is located in the gap between the guide ball 32 and the air inlet 31;

[0100] A reset block 36, which is connected to the end of the reset spring 35 and is connected to the guide ball 32;

[0101] A connecting rope 37 , one end of which is connected to the inner edge of the air inlet 31 , and the other end of which is connected to the guide ball 32 .

[0102] The working principle and beneficial effects of the above technical solution are:

[0103] When the air cooling pipe 7 sprays the roller surface of the power paper roller 3, part of the cold air can flow into the power paper roller 3 through the air inlet 31. After the cold air enters the air inlet 31, part of the cold air flows into the power paper roller 37 through the gap between the guide ball 32 and the air inlet 31, and part of the cold air enters the guide passage 34 and flows out from the other end of the guide passage 34; when the cold air enters the guide passage 34, it impacts the arc-shaped notch 33, and the guide ball 32 is forced to move toward the inside of the power paper roller 3, so that the other end of the guide passage 34 protrudes from the inner wall of the power paper roller 3. Since the guide passage 34 is bent, the cold air can flow along the inner wall of the power paper roller 3. Flow, thereby cooling the inner wall of the powered paper-feeding roller 3; the guide ball 32 moves slightly within a preset range under the pull of the connecting rope 37, and the guide ball 32 is always connected to the reset block 36. When the powered paper-feeding roller 3 rotates to no longer contact the cold air flow, the guide ball 32 is reset under the action of the reset spring 35; after resetting, the end of the guide passage 32 on the guide ball 32 is located in the air inlet 31 and is not directly facing the inside of the powered paper-feeding roller 3, which can reduce the outflow of cold air in the powered paper-feeding roller 3 to a certain extent.

[0104] Through the above structural design, an air inlet 31 is arranged on the powered paper passing roller 3, and when the air cooling pipe 7 blows on the powered paper passing roller 3, part of the cold air is guided into the inside of the powered paper passing roller 3 and flows along the inner wall of the powered paper passing roller 3; the powered paper passing roller 3 is cooled by the cold air on the inner wall and the outer wall at the same time, thereby improving the air cooling speed and the utilization rate of the cold air.

[0105] Embodiment 7:

[0106] like Figure 7-9 As shown, based on the above embodiment 6, the powered paper feeding roller 3 further includes:

[0107] A first baffle 41, the first baffle 41 is hinged to the inner wall of the powered paper feeding roller 3, a plurality of first baffles 41 are evenly arranged along the circumferential direction of the inner wall of the powered paper feeding roller 3, and the air inlet 31 is located between adjacent first baffles 41;

[0108] An elastic member 42, the elastic member 42 is connected between the first side of the first baffle 42 and the inner wall of the power paper feeding roller 3;

[0109] A second baffle 43, the second baffle 43 is hinged to an end of the first baffle 41 away from the power paper feeding roller 3, and an end of the second baffle 43 abuts against a second side of the adjacent first baffle 41;

[0110] Conical holes 46, a plurality of conical holes 46 are provided on the first baffle plate 41, and the diameter of one end of the conical hole 46 close to the inner wall of the power paper feeding roller 3 is larger than the diameter of the other end;

[0111] The exhaust hole is arranged at the end of the power paper feeding roller 3 .

[0112] The working principle and beneficial effects of the above technical solution are:

[0113] The power paper feed roller 3 and the first baffle 41 and the second baffle 43 inside it are arranged to form a cold air space. After the cold air flows in through the air inlet 31, it is concentrated in the cold air space, so that the cold air has a better cooling effect on the inner wall of the power paper feed roller 3. The first baffle 41 is provided with a tapered hole 46, which can make the original air in the cold air space flow into the power paper feed roller 3, and then the excess gas is discharged from the exhaust hole, so as to ensure the balance of air pressure in the power paper feed roller 3 and ensure that the cold air can continue to flow in.

[0114] Embodiment 8:

[0115] like Figure 7 , 8 As shown, based on the above-mentioned embodiment 7, the powered paper feeding roller 3 further includes:

[0116] The end plate 44 is rotatably arranged on the side of the power paper feeding roller 3 away from the pulley 11, the end plate 44 is installed on the air-cooled roller seat 1, and the end plate 44 shaft is connected to the output end of the motor, and the end plate 44 and the power paper feeding roller 3 move at a differential speed;

[0117] The triangle plate 45 , multiple triangle plates 45 are evenly connected to the end plate 44 , and the triangle plate 45 is located in the powered paper feed roller 3 , the first baffle plate 41 is crimped to the first side of the triangle plate 45 , and the second baffle plate 43 hinged on the first baffle plate 41 is crimped to the second side of the adjacent triangle plate 45 .

[0118] The working principle and beneficial effects of the above technical solution are:

[0119] The starting motor drives the end plate 44 to rotate, and the triangular plate 45 on the end plate 44 rotates accordingly; when the triangular plate 45 rotates, the first side squeezes the first baffle plate 41 to make it move toward the inner wall of the powered paper-feeding roller 3, and at the same time compresses and stores energy in the elastic member 42. Since the guide ball 32 has a certain flow-blocking effect, the airflow in the cold air space flows into the powered paper-feeding roller 3 through the conical hole 46 under the squeezing effect; the inner diameter of the conical hole 46 gradually decreases, thereby accelerating the flow rate of the airflow, so that the cold air in the cold air space is sprayed toward the center of the powered paper-feeding roller 3, fully disturbing the airflow in the powered paper-feeding roller 3, so that part of the cold air can enter its interior and mix quickly, thereby reducing the temperature inside the powered paper-feeding roller 3 and improving the cooling effect of the powered paper-feeding roller 3; when the first baffle plate 41 rotates, it drives the second baffle plate 43 to rotate, and the end of the second baffle plate 43 slides on the adjacent first baffle plate 41 to scrape off the dust attached thereto, so as to prevent the dust from entering the powered paper-feeding roller 3 and affecting the transmission.

[0120] The first baffle plate 41 rotates under the pressure of the triangular plate 45 until it passes over the triangular plate 45, and the first baffle plate 41 rotates and resets under the action of the elastic member 42, and the second baffle plate 43 rotates and resets under the action of the coil spring; and during the rotation and reset process of the first baffle plate 41 and the second baffle plate 43, the cold air space becomes larger, generating negative pressure, and generating suction force to assist the rapid entry of cold air, thereby improving the cold air introduction effect.

[0121] The present invention also provides a printing roller cooling method, using the printing roller cooling device, the specific method is:

[0122] The cold air blower inputs cold air into the cold air duct 7, and the cold air passes through a plurality of cold air exhaust holes on the surface of the cold air duct 7, and is discharged to the roller surface of the powered paper feed roller 3 to cool its surface. The cooled powered paper feed roller 3 contacts the printing substrate 2 to cool it down.

[0123] The present invention also provides a printing press provided with the printing roller cooling device.

[0124] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0125] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0126] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A printing roller cooling device, characterized in that: include: An air-cooled roller seat (1), wherein the air-cooled roller seat (1) is provided with a powered paper feed roller (3), a paper feed roller (4) and a powered pulling head roller (5) in sequence along the feeding direction of the printing substrate (2); An LED drying lamp (6), the LED drying lamp (6) is connected to the air-cooled roller seat (1) and is arranged on one side of the power paper feed roller (3), and is used to dry the ink on the printing substrate (2); A cold air duct (7) is connected to the air cooling roller seat (1) and is arranged on the other side of the powered paper feeding roller (3). The surface of the cold air duct (7) is provided with a plurality of cold air exhaust holes for conveying cold air to the roller surface of the powered paper feeding roller (3). The cold air duct (7) is connected to a cold air machine.

2. A printing roller cooling device according to claim 1, characterized in that: The height of the paper feed roller (4) is lower than that of the powered paper feed roller (3) and the powered pull head roller (5). After the printed substrate (2) surrounds the powered paper feed roller (3), an air cooling space is formed on the side close to the cold air duct (7).

3. The printing roller cooling device according to claim 1, characterized in that: The number of cold air ducts (7) is set to two, and the two cold air ducts (7) are arranged up and down, and are used to convey cold air to the upper part and the lower part of the side of the powered paper feeding roller (3).

4. A printing roller cooling device according to claim 1, characterized in that: Also includes: A servo motor (8) is installed on the outside of the air-cooled roller seat (1); the output end of the servo motor (8) is connected to a reducer (9); the output end of the reducer (9) is connected to one end of the rotating shaft of the power pulling head roller (5) through a coupling (10).

5. A printing roller cooling device according to claim 4, characterized in that: Also includes: A synchronous belt assembly, comprising: a pulley (11), a synchronous belt (12) and a synchronous belt tensioning mechanism (13), wherein the two pulleys (11) are respectively connected to the rotating shaft of a power pulling head roller (5) and the rotating shaft of a power paper feeding roller (3); the synchronous belt (12) is arranged around the two pulleys (11); the synchronous belt tensioning mechanism (13) is arranged on the outside of the synchronous belt (12), and a tensioning wheel (14) is arranged at the output end of the synchronous belt tensioning mechanism (13), the tensioning wheel (14) is pressed onto the synchronous belt (12), and the tensioning force of the tensioning wheel (14) on the synchronous belt (12) is adjustable.

6. A printing roller cooling device according to claim 1, characterized in that: Also includes: The paper pressing roller mechanism comprises: A paper pressing roller frame (15), one end of the paper pressing roller frame (15) is rotatably connected to the air-cooled roller seat (1), and the other end is connected to a roller; A paper pressing roller (17), the paper pressing roller (17) is mounted on the paper pressing roller frame (15) and is located above the power pulling head roller (5), and a pressing channel is formed between the paper pressing roller (17) and the power pulling head roller (5) for the printing substrate (2) to pass through; A spring seat (18), the spring seat (18) is connected to the inner wall of the air-cooled roller seat (1) and is located above one end of the paper pressing roller frame (15) close to the roller; A spring (19) is connected between the spring seat (18) and the paper pressing roller frame (15).

7. A printing roller cooling device according to claim 6, characterized in that: The paper pressing roller mechanism also includes: Cylinders (20), two groups of cylinders (20) are symmetrically arranged outside the air-cooled roller seat (1), and the two groups of cylinders (20) act synchronously; A connecting rod (21), one end of the connecting rod (21) is connected to the output end of the cylinder (20), and the other end is connected to the rotating block (16). The rotating block (16) is rotatably connected to the side wall of the air-cooled roller seat (1), and a notch is provided on the rotating block (16). The roller is rotatably arranged on the rotating block (16).

8. The printing roller cooling device according to claim 1, characterized in that: The LED drying lamp (6) is provided with a lampshade (22) with an opening at the bottom end, the lampshade (22) is buckled on the outside of the powered paper feeding roller (3), and a gap is formed between the edge of the lampshade (21) and the powered paper feeding roller (3) for the printing substrate (2) to pass through.

9. A printing roller cooling method, using a printing roller cooling device as claimed in any one of claims 1 to 8, characterized in that: The specific method is: The cooling fan inputs cold air into the cold air pipe (7), and the cold air passes through a plurality of cold air discharge holes on the surface of the cold air pipe (7), and is discharged to the roller surface of the powered paper feeding roller (3), thereby cooling the surface of the powered paper feeding roller (3). After cooling, the powered paper feeding roller (3) contacts the printing substrate (2) to cool it.

10. A printing press, characterized in that: A printing roller cooling device as claimed in any one of claims 1 to 8 is provided.

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