CN213199131U

CN213199131U - Five-color offset press

Info

Publication number: CN213199131U
Application number: CN202021463669.1U
Authority: CN
Inventors: 路大如
Original assignee: Hangzhou Xiaoshan Haifeng Printing Co ltd
Current assignee: Hangzhou Xiaoshan Haifeng Printing Co ltd
Priority date: 2020-07-22
Filing date: 2020-07-22
Publication date: 2021-05-14
Anticipated expiration: 2030-07-22

Abstract

The application relates to the technical field of printing equipment, in particular to a five-color offset press, which comprises a frame, a paper conveying mechanism arranged at the feed end of the frame, a paper receiving mechanism arranged at the discharge end of the frame, five printing units arranged on the frame side by side and a paper conveying roller arranged in the frame, wherein five printing units are arranged between the paper conveying mechanism and the paper receiving mechanism, the frame is provided with a heat exchange pipeline used for radiating the printing units, the heat exchange pipeline comprises an air inlet pipe, an exhaust pipe and a heat exchange pipe connected with the air inlet pipe and the exhaust pipe, the heat exchange pipe penetrates through the five printing units, the air inlet pipe is positioned on one side of the feed end of the frame, the exhaust pipe is positioned on one side of the discharge end of the frame, an air inlet fan is arranged in the air inlet pipe, a refrigerating device is arranged on the air inlet pipe, and, an exhaust fan is arranged in the exhaust pipe. This application has the effect that the radiating effect is good, printing quality is high.

Description

Five-color offset press

Technical Field

The application relates to the technical field of printing equipment, in particular to a five-color offset press.

Background

An offset printing press is a kind of offset printing press, in which printing images are first printed on a blanket cylinder from a printing plate and then transferred to paper by the blanket cylinder. Offset presses can be classified into monochromatic, bicolor, four-color, and multicolor presses according to the number of printing colors completed by one-pass paper feed. A five-color offset printing press is an offset printing press with five printing units.

The Chinese patent with the publication number of CN206141086U discloses a four-color offset press, which comprises a press body, wherein a paper feeding device, four printing units and a paper collecting device are sequentially connected to the press body, a platform is arranged on one side of the press body, the platform is hollow, a plurality of accommodating devices are arranged in the platform side by side, each accommodating device comprises a box body with an open top, a plurality of sliding pieces, a sliding groove and a springback piece, the sliding pieces are arranged at the bottom of the box body, the sliding grooves are arranged at the bottom of the inner side of the platform, the sliding grooves are matched with the sliding pieces, one end of the springback piece is connected with the outer side face of the box body, and the other end of the springback piece is connected with the inner. The four-color offset press facilitates the storage of tools and improves the safety.

With respect to the related art among the above, the inventors consider that the following drawbacks exist: in the printing process, the printing mechanism in the shell of the printing unit generates heat when in operation, the temperature in the printing unit rises, so that the temperature of the ink rises, the fluidity of the ink is enhanced, the viscosity is reduced, and the quality of a printed matter is influenced.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that a printing unit is slow in heat dissipation, the application provides a five-color offset press.

The application provides a five-color offset press adopts following technical scheme:

a five-color offset press comprises a frame, a paper feeding mechanism arranged at the feeding end of the frame, a paper collecting mechanism arranged at the discharging end of the frame, five printing units arranged on the frame side by side and a paper conveying roller arranged in the frame, wherein the five printing units are arranged between the paper feeding mechanism and the paper collecting mechanism, the frame is provided with a heat exchange pipeline used for radiating heat of the printing unit, the heat exchange pipeline comprises an air inlet pipe, an exhaust pipe and a heat exchange pipe connecting the air inlet pipe and the exhaust pipe, the heat exchange tube penetrates through the five printing units, the air inlet pipe is positioned at one side of the feed end of the frame, the exhaust pipe is positioned at one side of the discharge end of the frame, an air inlet fan is arranged in the air inlet pipe, a refrigerating device is arranged on the air inlet pipe, the air inlet fan and the refrigerating device are sequentially arranged along the air inlet direction of the air inlet pipe, and an exhaust fan is arranged in the exhaust pipe.

By adopting the technical scheme, when the printing work is started, the heat exchange pipeline is connected with the power supply, the air is sucked in from the outside by the air inlet fan, the air enters the heat exchange pipe after being cooled by the refrigerating device of the air inlet pipe, is subjected to heat exchange with the printing unit and is then discharged by the exhaust fan of the exhaust pipe, and the heat of the printing unit is conducted to the outside by the heat exchange pipeline, so that the heat dissipation of the printing unit is accelerated, the temperature of the printing ink is stable, and the quality of a printed matter is prevented from being influenced.

Preferably, the refrigerating device comprises a semiconductor refrigerator, and the cold end of the semiconductor refrigerator is positioned in the air inlet pipe, and the hot end of the semiconductor refrigerator is positioned outside the air inlet pipe.

By adopting the technical scheme, when the air inlet fan starts to suck air from the outside, the semiconductor refrigerator is powered on to start refrigeration, the air can be cooled when passing through the cold end of the semiconductor refrigerator and then enters the heat exchange tube to exchange heat with the printing unit, the operation is simple, and the response is rapid.

Preferably, the cold end is provided with a cold guide frame, and a gap is reserved between the cold guide frame and the inner wall of the air inlet pipe.

By adopting the technical scheme, the cold end temperature of the semiconductor refrigerator is conducted by the cold guide frame, and the air entering the air inlet pipe can be sufficiently and uniformly cooled.

Preferably, the hot end is provided with a heat conduction block, the heat conduction block is provided with a cooling fan, and a first heat conduction fin is arranged between the heat conduction block and the cooling fan.

Through adopting above-mentioned technical scheme, first heat conduction fin has strengthened the heat dispersion of hot junction, and radiator fan has accelerated the air flow of first heat conduction fin department simultaneously, further cools down the hot junction to guarantee semiconductor cooler's normal work.

Preferably, the air inlet of the air inlet pipe and the air outlet of the exhaust pipe are both provided with dustproof components.

Through adopting above-mentioned technical scheme, dustproof subassembly can avoid more dust to get into in the heat exchange tube and adhere to at the cold junction and lead cold frame surface and influence refrigeration effect.

Preferably, the dustproof assembly comprises a baffle plate provided with a ventilation opening and a dustproof plate arranged at the ventilation opening, and a dustproof grid is arranged between the baffle plate and the dustproof plate.

Through adopting above-mentioned technical scheme, the dust guard can prevent that the dust from falling into in the air inlet from the air inlet top, and dustproof net plays certain filtering action to inspiratory air, avoids great granule to be inhaled the intake pipe.

Preferably, the printing unit comprises a printing device and a casing arranged outside the printing device, the casing comprises an inner casing and an outer casing which are arranged inside and outside in sequence, and second heat-conducting fins are arranged between the inner casing and the outer casing.

By adopting the technical scheme, when the offset press works and the printing device of the printing unit operates to enable the temperature of the printing unit to rise, the inner shell absorbs heat and transmits the heat to the outer shell through the first heat conduction fins, and the heat dissipation effect is improved.

Preferably, the second heat conduction fin is waved.

Through adopting above-mentioned technical scheme, corrugated second heat conduction fin has increased heat radiating area, makes the radiating effect further strengthen.

Preferably, a cavity is defined by the inner shell, the outer shell and the second heat conduction fins, and a phase change material is arranged in the cavity.

By adopting the technical scheme, when the temperature of the shell reaches the phase change temperature, the phase change material is subjected to phase change to absorb heat, so that the temperature of the shell is reduced, and the cooling effect is achieved.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the heat exchange pipeline is arranged to exchange heat with the printing unit, so that the heat dissipation of the printing unit is accelerated, the temperature of the printing ink is kept stable, and the quality of a printed matter is prevented from being influenced;

2. by arranging the dustproof assembly, more dust is prevented from entering the heat exchange pipeline and attaching to the cold end and the surface of the cold guide frame to influence the refrigeration effect;

3. through setting up inner shell and shell to set up the second fin between inner shell and shell, improved the radiating effect.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;

FIG. 2 is a schematic view showing the entire mechanism of the heat exchange tube;

FIG. 3 is a schematic structural view at an intake pipe in the embodiment of the present application;

FIG. 4 is a schematic view of the structure of the exhaust pipe in the embodiment of the present application;

FIG. 5 is an exploded view of the intake pipe in the embodiment of the present application;

fig. 6 is a schematic structural diagram of a printing unit in the embodiment of the present application.

Description of reference numerals: 1. a frame; 11. a step; 12. a guardrail; 2. a paper feed mechanism; 3. a paper delivery mechanism; 4. a printing unit; 41. a printing device; 42. a housing; 421. an inner shell; 422. a housing; 423. a second heat-conducting fin; 424. a cavity; 5. a paper transfer roller; 6. a heat exchange conduit; 61. an air inlet pipe; 611. an air intake fan; 62. an exhaust pipe; 621. an exhaust fan; 63. a heat exchange tube; 631. a longitudinal section; 632. a transverse section; 64. a refrigeration device; 641. a cold end; 6411. a cold guide frame; 642. a hot end; 6421. a heat conducting block; 6422. a first heat-conducting fin; 643. a heat radiation fan; 65. a dust-proof assembly; 651. a baffle plate; 652. a dust-proof plate; 653. and (4) a dustproof grid.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

The embodiment of the application discloses a five-color offset press. Referring to fig. 1, the five-color offset printing press includes a frame 1, a paper feeding mechanism 2 disposed at a feeding end of the frame 1, a paper delivery mechanism 3 disposed at a discharging end of the frame 1, five printing units 4 disposed side by side on the frame 1, and a paper delivery cylinder 5 disposed in the frame 1. Five printing units 4 are provided between the paper feed mechanism 2 and the paper delivery mechanism 3. The sheet feeding mechanism 2 feeds the stacked sheets into the printing unit 4, the printing device 41 in the printing unit 4 performs a printing operation on the sheets, and the printed sheets are collated by the sheet delivery mechanism 3. One side of the frame 1 is provided with a step 11, one side of the step 11 far away from the frame is provided with a guardrail 12, and an operator can step on the step 11 to check, maintain and the like the devices.

Referring to fig. 2, the printing unit 4 is provided with a heat exchange duct 6. The heat exchange tube 6 includes an intake pipe 61, an exhaust pipe 62, and a heat exchange pipe 63 connecting the intake pipe 61 and the exhaust pipe 62. The intake pipe 61, the exhaust pipe 62, and the heat exchange pipe 63 are square pipes. The heat exchange pipe 63 is arranged on the bottom surface of the frame, the heat exchange pipe 63 comprises a longitudinal section 631 and transverse sections 632 arranged at two ends of the longitudinal section 631, the longitudinal section 631 of the heat exchange pipe 63 penetrates through the five printing units 4, and the transverse sections 632 are used for being connected with the air inlet pipe 61 and the air outlet pipe 62. The air inlet pipe 61 and the air outlet pipe 62 are both kept vertical, the air inlet pipe 61 is positioned on one side of the feeding end of the frame 1, and the air outlet pipe 62 is positioned on one side of the discharging end of the frame 1.

Referring to fig. 3, an intake fan 611 is provided in the intake duct 61, a refrigeration device 64 is provided in the intake duct 61, and the intake fan 611 and the refrigeration device 64 are provided in this order along the intake direction of the intake duct 61. Referring to fig. 4, an exhaust fan 621 is provided in the exhaust pipe 62. The air inlet fan 611 and the air outlet fan 621 are both provided with micro motors for driving the fan blades to rotate, and the two micro motors and the refrigerating device 64 adopt the same control unit, so as to ensure that the heat exchange pipeline 6 is ventilated and simultaneously refrigerates, and ensure that the heat exchange pipeline 6 has a good heat exchange effect.

During operation, the power is switched on, the whole machine starts to preheat, when the temperature reaches a certain requirement, a working button is pressed, the paper is automatically separated from the paper stack by the paper conveying mechanism 2, the paper enters the first printing unit 4 to print a first color, then enters the second printing unit 4 to perform second color printing under the transmission of the paper conveying roller 5 until the fifth printing unit 4 is printed, the printed paper is transmitted to the paper collecting mechanism 3, and finally, the whole printing process is completed by paper collecting and folding. When the printing operation starts, the heat exchange pipeline 6 is powered on, the air is sucked from the outside by the air inlet fan 611, the air enters the heat exchange pipe 63 after being cooled by the refrigerating device 64 of the air inlet pipe 61, is subjected to heat exchange with the printing unit 4 and then is exhausted by the exhaust fan 621 of the exhaust pipe 62, the heat of the printing unit 4 is conducted to the outside by the heat exchange pipeline 6, the heat dissipation of the printing unit 4 is accelerated, the temperature of the ink is stable, and the quality of printed matters is prevented from being influenced. The heat exchanger tubes 63 are mounted so as to avoid direct contact with the printing unit 41 in the printing unit 4, and so as to avoid the hot air in the printing unit 4 from liquefying into water droplets on the outer surface of the heat exchanger tubes 63, thereby affecting the printing unit 41.

Referring to fig. 5, refrigeration unit 64 comprises a semiconductor refrigerator having a cold end 641 located within intake duct 61 and a hot end 642 located outside intake duct 61. When the air intake fan 611 starts to suck air from the outside, the semiconductor cooler is powered on to start cooling, and the air is cooled when passing through the cold end 641 of the semiconductor cooler and then enters the heat exchange tube 63 to exchange heat with the printing unit 4, so that the operation is simple and the response is quick.

Referring to fig. 5, the cold end 641 is provided with a cold lead frame 6411. The cold guide frame 6411 is a rectangular frame arranged in the air inlet pipe 61, and is made of an aluminum alloy material with excellent heat conductivity, and the cold guide frame 6411 and the cold end 641 are integrally formed. A gap is left between the cold guide frame 6411 and the inner wall of the air inlet pipe 61, so that the influence on the refrigeration effect caused by the direct conduction of the temperature of the cold end 641 to the pipe wall of the air inlet pipe 61 is avoided. The cold lead frame 6411 conducts the temperature of the cold end 641 of the semiconductor refrigerator to cool the air introduced into the intake duct 61 substantially uniformly.

Referring to fig. 5, the hot end 642 is provided with a heat-conducting block 6421. The heat conduction block 6421 is a rectangular aluminum alloy thin plate, the heat conduction block 6421 is provided with a heat dissipation fan 643, a plurality of first heat conduction fins 6422 are provided between the heat conduction block 6421 and the heat dissipation fan 643, the first heat conduction fins 6422 are vertically provided on the heat conduction block 6421 at equal intervals, and the heat dissipation fan 643 is mounted on the first heat conduction fins 6422 by bolts. The first heat-conducting fins 6422 enhance the heat dissipation performance of the hot end 642, and the heat-dissipating fan 643 accelerates the air flow at the position of the first heat-conducting fins 6422, so as to further cool the hot end 642, thereby ensuring the normal operation of the semiconductor cooler.

Referring to fig. 5, with reference to the intake pipe 61, the dust-proof assembly 65 is disposed at both the air inlet of the intake pipe 61 and the air outlet of the exhaust pipe 62. The dustproof assembly 65 can prevent more dust from entering the heat exchange pipeline 6 and adhering to the surfaces of the cold end 641 and the cold guide frame 6411 to affect the refrigeration effect.

The dust-proof assembly 65 includes a baffle 651 and a dust-proof plate 652. The baffle 651 is a rectangular plate, and covers the air inlet of the air inlet pipe 61, and is welded and fixed to the air inlet pipe 61. The baffle 651 is provided with a vent, and the dust guard 652 is arranged at the vent. A dust grid 653 is arranged between the baffle 651 and the dust guard 652. Dust guard 652 can prevent that the dust from falling into the intake pipe 61 from the air inlet top in, and dustproof net 653 plays certain filtering action to the air of inhaling, avoids great granule to be inhaled intake pipe 61.

Referring to fig. 6, the printing unit 4 includes a printing device 41 and a housing 42 provided outside the printing device 41. The casing 42 includes an inner casing 421 and an outer casing 422 that are arranged inside and outside in sequence, a second heat conduction fin 423 is arranged between the inner casing 421 and the outer casing 422, and the second heat conduction fin 423 is provided with a plurality of fins. When the offset printing machine is in operation, the printing device 41 of the printing unit 4 operates to raise the temperature of the printing unit 4, and the inner shell 421 absorbs heat and transfers the heat to the outer shell 422 through the second heat-conducting fins 423, thereby improving the heat dissipation effect. The second heat transfer fins 423 have a wave shape. The second heat conductive fins 423 having a wave shape increase a heat dissipation area, so that a heat dissipation effect is further enhanced.

A cavity 424 is defined by the inner shell 421, the outer shell 422, and the second heat conductive fins 423, and a phase change material is disposed in the cavity 424, and the phase change material may be phase change wax. When the temperature of the casing 42 reaches the phase transition temperature, the phase transition material undergoes phase transition to absorb heat, thereby lowering the temperature of the casing 42 and achieving a cooling effect.

The implementation principle of the five-color offset press in the embodiment of the application is as follows: during operation, the power is switched on, the whole machine starts to preheat, when the temperature reaches a certain requirement, a working button is pressed, the paper is automatically separated from the paper stack by the paper conveying mechanism 2, the paper enters the first printing unit 4 to print a first color, then enters the second printing unit 4 to perform second color printing under the transmission of the paper conveying roller 5 until the fifth printing unit 4 is printed, the printed paper is transmitted to the paper collecting mechanism 3, and finally, the whole printing process is completed by paper collecting and folding. When the printing operation starts, the heat exchange pipeline 6 is powered on, the air is sucked from the outside by the air inlet fan 611, the air is sufficiently and uniformly cooled by the cold end 641 and the cold guide frame 6411 when passing through the cold end 641 of the semiconductor refrigerator, the cooled air enters the heat exchange pipe 63 to exchange heat with the printing unit 4, and then is discharged by the exhaust fan 621 of the exhaust pipe 62, the heat of the printing unit 4 is conducted to the outside by the heat exchange pipeline 6, so that the heat dissipation of the printing unit 4 is accelerated, meanwhile, the second fin can also dissipate the heat of the casing 42, and when the temperature of the casing 42 reaches the phase-change temperature, the phase-change material can absorb the heat in a phase-change manner to cool the casing 42, so that the ink temperature can be kept stable, and the quality of printed.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a five-color offset press, includes frame (1), sets up at paper feed mechanism (2) of frame (1) feed end, sets up paper receiving mechanism (3) at frame (1) discharge end, sets up five printing unit (4) on frame (1) side by side and sets up paper transfer cylinder (5) in frame (1), five printing unit (4) set up between paper feed mechanism (2) and paper receiving mechanism (3), its characterized in that: frame (1) is equipped with and is used for carrying out radiating heat exchange pipeline (6) to printing unit (4), heat exchange pipeline (6) are including intake pipe (61), blast pipe (62) and connect intake pipe (61) and blast pipe (62) hot exchange pipe (63), hot exchange pipe (63) run through five printing unit (4), intake pipe (61) are located frame (1) feed end one side, blast pipe (62) are located frame (1) discharge end one side, be equipped with inlet fan (611) in intake pipe (61), be equipped with refrigerating plant (64) on intake pipe (61), inlet fan (611) and refrigerating plant (64) set gradually along the direction of admitting air of intake pipe (61), be equipped with exhaust fan (621) in blast pipe (62).

2. A five color offset printing press as claimed in claim 1, wherein: the refrigerating device (64) comprises a semiconductor refrigerator, the cold end (641) of the semiconductor refrigerator is positioned in the air inlet pipe (61), and the hot end (642) of the semiconductor refrigerator is positioned outside the air inlet pipe (61).

3. A five color offset printing press as claimed in claim 2, wherein: the cold end (641) is provided with a cold guide frame (6411), and a gap is reserved between the cold guide frame (6411) and the inner wall of the air inlet pipe (61).

4. A five color offset printing press as claimed in claim 2, wherein: the hot end (642) is provided with a heat-conducting block (6421), the heat-conducting block (6421) is provided with a heat-radiating fan (643), and a first heat-conducting fin (6422) is arranged between the heat-conducting block (6421) and the heat-radiating fan (643).

5. A five color offset printing press as claimed in claim 1, wherein: and the air inlet of the air inlet pipe (61) and the air outlet of the exhaust pipe (62) are respectively provided with a dustproof assembly (65).

6. A five color offset printing press as claimed in claim 5, wherein: dustproof subassembly (65) are including baffle (651) that are equipped with the vent and establish dust guard (652) in vent department, be equipped with dustproof net (653) between baffle (651) and dust guard (652).

7. A five color offset printing press as claimed in claim 1, wherein: the printing unit (4) comprises a printing device (41) and a machine shell (42) arranged outside the printing device (41), the machine shell (42) comprises an inner shell (421) and an outer shell (422) which are arranged inside and outside in sequence, and second heat-conducting fins (423) are arranged between the inner shell (421) and the outer shell (422).

8. A five color offset printing press as claimed in claim 7, wherein: the second heat conduction fin (423) is wavy.

9. A five color offset printing press as claimed in claim 7, wherein: a cavity (424) is enclosed among the inner shell (421), the outer shell (422) and the second heat conduction fins (423), and phase change materials are arranged in the cavity (424).