CN116409057B - Digital ink-jet printing system compatible with film printing - Google Patents
Digital ink-jet printing system compatible with film printing Download PDFInfo
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- CN116409057B CN116409057B CN202111660652.4A CN202111660652A CN116409057B CN 116409057 B CN116409057 B CN 116409057B CN 202111660652 A CN202111660652 A CN 202111660652A CN 116409057 B CN116409057 B CN 116409057B
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- 238000007639 printing Methods 0.000 title claims abstract description 235
- 238000007641 inkjet printing Methods 0.000 title claims abstract description 35
- 238000004804 winding Methods 0.000 claims abstract description 21
- 230000007246 mechanism Effects 0.000 claims abstract description 20
- 238000007599 discharging Methods 0.000 claims abstract description 12
- 239000010408 film Substances 0.000 claims description 168
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 157
- 238000001816 cooling Methods 0.000 claims description 127
- 238000010030 laminating Methods 0.000 claims description 41
- 230000003014 reinforcing effect Effects 0.000 claims description 37
- 238000007789 sealing Methods 0.000 claims description 31
- 238000009434 installation Methods 0.000 claims description 28
- 239000003638 chemical reducing agent Substances 0.000 claims description 24
- 230000005540 biological transmission Effects 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 13
- 230000006835 compression Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- 210000001503 joint Anatomy 0.000 claims description 6
- 238000007711 solidification Methods 0.000 claims description 5
- 230000008023 solidification Effects 0.000 claims description 5
- 239000010409 thin film Substances 0.000 claims description 4
- 238000001179 sorption measurement Methods 0.000 abstract description 3
- 239000000498 cooling water Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000007650 screen-printing Methods 0.000 description 3
- 239000003086 colorant Substances 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000003028 elevating effect Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007646 gravure printing Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J11/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
- B41J11/0015—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing
- B41J11/002—Curing or drying the ink on the copy materials, e.g. by heating or irradiating
- B41J11/0021—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using irradiation
- B41J11/00214—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using irradiation using UV radiation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J15/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in continuous form, e.g. webs
- B41J15/04—Supporting, feeding, or guiding devices; Mountings for web rolls or spindles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
- B41J3/407—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for marking on special material
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Accessory Devices And Overall Control Thereof (AREA)
Abstract
The invention discloses a digital ink-jet printing system compatible with film printing, which comprises a coil stock winding and unwinding mechanism, a film conveying device and a plate conveying mechanism; the plate conveying mechanism comprises a plate feeding platform and a plate discharging platform which are respectively arranged at the rear and the front of the printing platform; the plate feeding platform conveys paper card or sheet printing media to the top surface of the conveyor belt, enters the printing platform and is adsorbed on the top surface of the conveyor belt of the printing plane by the adsorption platform; the coil stock winding and unwinding mechanism comprises an unwinding device and a winding device, wherein the unwinding device is arranged above the plate feeding platform, and the winding device is arranged above the plate discharging platform; the film is led into a printing platform through a film pasting unit, and the printed film is led out to a winding device through a film starting unit along with a conveying belt and is wound into a coil; the printing plate can be printed, the film can be printed, and the printing medium can be adsorbed by the air suction platform, so that the printing plate has good compatibility and good printing quality.
Description
Technical Field
The invention belongs to the technical field of ink-jet printers, and particularly relates to a digital ink-jet printing system compatible with film printing.
Background
In the prior art, a screen printing process is adopted for printing coiled material film materials, plate making is needed, in the screen printing process, transmission is needed to be stopped firstly, after a pattern of one layout is printed, the pattern at the next position can be printed only by downward transmission, continuous output is not needed, and the pattern replacement is needed to be performed again; the other gravure printing process using the roller also needs plate making, which has high plate making cost and is only applicable to printing of coiled materials; still other digital ink-jet processes are adopted, but the printing plane is a curved surface, and can only be applied to film printing, but cannot be applied to printing of plates.
The printing precision and the automation degree of the digital ink-jet printing in the prior art have obvious advantages compared with the screen printing process.
Because the film coil is inconvenient to fix on the planar printing surface, the quality of the product printed by using the digital ink jet with the planar printing surface is not satisfactory, and the digital ink jet printing with the planar printing surface is always limited to the printing of printing media such as plates.
Therefore, how to utilize the advantages of the digital ink-jet printing technology to be compatible with printing of coil stock films is highly concerned by the industry.
Disclosure of Invention
In view of the above-mentioned drawbacks, the present invention aims to provide a digital ink-jet printing system compatible with film printing, which can print both sheet materials and coil materials, and has good printing quality.
To achieve the purpose, the invention adopts the following technical scheme:
A digital ink-jet printing system compatible with film printing is provided with a printing platform, wherein a conveying belt for conveying printing media is sleeved on the outer side surface of the printing platform, and an air suction platform is arranged below the printing platform and comprises a coil stock winding and unwinding mechanism, a film conveying device and a plate conveying mechanism;
The plate conveying mechanism comprises a plate feeding platform and a plate discharging platform which are respectively arranged at the rear and the front of the printing platform; the board feeding platform conveys paper card or sheet type printing medium to the top surface of the conveyor belt, enters the printing platform and is adsorbed on the top surface of the conveyor belt of the printing plane by the air suction platform, and the printed paper card or sheet type printing medium is continuously conveyed to the board discharging platform by the conveyor belt and is output;
The coil stock winding and unwinding mechanism comprises an unwinding device and a winding device, wherein the unwinding device is arranged above the plate feeding platform, and the winding device is arranged above the plate discharging platform;
The film conveying device comprises a film sticking unit and a film lifting unit, wherein the left side and the right side of the film sticking unit are arranged on the left side and the right side of the rear end of the printing platform in a supporting mode, and the left side and the right side of the film lifting unit are arranged on the left side and the right side of the front end of the printing platform in a supporting mode;
The coil stock of the printing medium of film material coil stock class install in unreeling device, unreel the device and open a book output film, the film passes through the pad pasting unit is imported print platform, and by the platform that induced drafts adsorbs in print planar the top surface of conveyer belt, after printing the film follows the conveyer belt is passed through play membrane unit exports to the coiling mechanism is rolled up and is the coil stock.
Further, the film sticking unit comprises a first mounting base, a first lifting device, a first guide roller and a film sticking compression roller;
The two first mounting bases are respectively mounted on the left side and the right side of the front end of the printing platform, the two first lifting devices are respectively mounted on the opposite inner side surfaces of the two first mounting bases, the two ends of the first guide roller are respectively rotatably mounted on the tops of the opposite inner side surfaces of the two first mounting bases, the two ends of the two film laminating press rollers are respectively connected with the output ends of the two first lifting devices, the first guide roller is positioned above the film laminating press rollers, the first lifting devices drive the film laminating press rollers to descend, and the lower roller surfaces of the film laminating press rollers are close to the top surface of the printing platform;
the film lifting unit is arranged on the left side and the right side of the rear end of the printing platform, the film lifting unit is provided with a film lifting press roller, and the lower roller surface of the film lifting press roller is flush with the lower roller surface of the film pasting press roller.
Further, the first mounting base is provided with a mounting side plate;
The middle part of the installation side plate is provided with an elliptical avoidance cavity, the two installation side plates are respectively installed on the opposite inner side surfaces of the two first installation bases, the outer side surface of the bottom of the installation side plate is connected with the inner side surface of the first installation base, and the top of the installation side plate extends forwards and obliquely upwards along the printing running direction;
The first lifting device comprises a lifting guide rail, an air cylinder mounting plate, a connecting seat and a limiting adjusting screw rod;
The two lifting guide rails are respectively arranged close to the front side and the rear side of the outer side surface of the installation side plate, and the front side and the rear side of the connecting seat are respectively and slidably arranged on the opposite inner side surfaces of the two lifting guide rails; the cylinder mounting plate is mounted on the top of the mounting side plate, and the cylinder is mounted on the outer side surface of the cylinder mounting plate; the output end of the air cylinder is downwards connected with the top end of the connecting seat in a transmission way;
Any one of the left end and the right end of the film pasting compression roller penetrates through the avoidance cavity and is rotatably arranged on the connecting seat;
the air cylinders drive the two connecting seats to drive the left end and the right end of the film pasting compression roller to move up and down in the avoidance cavity;
the two limit adjusting screw rods are arranged on the front side and the rear side of the air cylinder, and the lower ends of the limit adjusting screw rods are connected with the top of the connecting seat in a threaded mode.
Further, the device also comprises a first rotary side plate and a first reinforcing roller;
the outer side surfaces of one ends of the two first rotating side plates are respectively rotatably arranged on the inner side surfaces opposite to the two cylinder mounting plates, and the left end and the right end of the first guide roller are rotatably arranged on the inner side surfaces of the other ends of the two first rotating side plates;
The left end and the right end of the hollow first reinforcing roller respectively prop against two opposite inner side surfaces of one end of the two first rotating side plates;
the first rotary side plate is provided with an angle adjusting hole and a mounting adjusting hole;
The installation adjusting holes penetrate through the plate surface of the first rotating side plate from left to right, the installation adjusting holes are distributed on the plate surface of the first rotating side plate at intervals, two installation adjusting holes corresponding to each other left and right are in a group, and each group of installation adjusting holes can be used for installing the left end and the right end of the first guide roller;
the plurality of arc-shaped angle adjusting holes positioned on the same circumference surround the joint of the first rotating side plate and the first reinforcing roller, the angle adjusting holes are detachably arranged at one end of a fastening piece, and the other end of the fastening piece is detachably fixed on the cylinder mounting plate;
The first mounting base is also provided with a plurality of base adjusting holes;
The base adjusting holes penetrate through the first mounting base from top to bottom, the base adjusting holes are divided into two groups and are arranged along the front-rear direction, adjusting screw rods are mounted in the base adjusting holes, and the bottom ends of the adjusting screw rods are propped against the mounting surface of the first mounting base.
Further, the film lifting unit further comprises a second mounting base, a second lifting device, a second guide roller, a second reinforcing roller and a second rotary side plate;
The structures of the second mounting base, the second lifting device, the second guide roller, the film lifting press roller, the second reinforcing roller and the second rotating side plate are respectively the same as those of the first mounting base, the first lifting device, the first guide roller, the film pasting press roller, the first reinforcing roller and the first rotating side plate in a one-to-one correspondence manner;
The film pasting press roll introduces a film to be printed to the printing platform through the first guide roll which is in butt joint with the unreeling device, and the film lifting press roll derives the film which is finished being printed from the printing platform to the reeling device through the second guide roll which is in butt joint with the reeling device.
Further, the device also comprises a solidification module, a plurality of lifting cages and a cooling system;
the lifting cages are arranged above the printing platform at intervals, and the inkjet printing heads are arranged below the lifting cages;
the curing module comprises a primary curing unit, a reinforcing curing unit and a final curing unit;
The primary curing unit is arranged close to the front of the operation of the inkjet printing head, the reinforcing curing unit is arranged between two adjacent lifting cages, and the final curing unit is arranged in front of the operation of the last lifting cage;
The primary curing unit, the reinforcing curing unit and the final curing unit comprise a plurality of UV lamps which are arranged along the direction perpendicular to the printing operation direction; the UV lamp irradiates downwards on a printing plane;
the cooling system comprises a water cooling device;
The water cooling device comprises a plurality of cold water pipes, the plurality of cold water pipes extend along the printing running direction, the plurality of cold water pipes are arranged along the direction parallel to the printing running direction, and the top surfaces of the plurality of cold water pipes are propped against and cover the bottom surface of the conveyor belt positioned on the printing platform;
the front end and the rear end of the cold water pipe are respectively communicated with an output port and an input port of an external cold water circulation system.
Further, the water cooling device also comprises an air suction plate, an air suction cavity, a water inlet pipe and a water outlet pipe;
The plurality of air suction plates extend along the printing running direction, the plurality of cold water pipes and the plurality of air suction plates are arranged at intervals along the direction parallel to the printing running direction, the left and right sides of the air suction plates are respectively connected with the outer walls of the two cold water pipes adjacent left and right, and the top surfaces of the plurality of cold water pipes and the plurality of air suction plates are propped upwards and cover the bottom surface of the conveyor belt positioned on the printing platform; the cold water pipes and the air suction plates are positioned at the top of the air suction cavity;
A plurality of air suction holes are arranged on the plate surface of the air suction plate at intervals along the printing running direction, the air suction holes are downwards communicated with the input end of the air suction cavity, and the output end of the air suction cavity is communicated with the input port of an external exhaust fan;
the water inlet pipe and the water outlet pipe are respectively positioned at the front end and the rear end of the cold water pipe; the input end of the water inlet pipe is communicated with an output port of an external cold water circulation system; the output end of the water outlet pipe is communicated with an input port of an external cold water circulation system;
the water inlet pipe is provided with a water outlet, the water outlet is positioned at one side of the water inlet pipe, which is close to the cold water pipe, and the water outlet is communicated with one end of the cold water pipe;
The water outlet pipe is provided with a plurality of water inlets, the water inlets are positioned at one side of the water outlet pipe, which is close to the cold water pipe, and the water inlets are communicated with the other end of the cold water pipe;
The cold water pipe with the inlet tube with the outlet pipe is square pipe, the cold water pipe the top surface of inlet tube the top surface of outlet pipe is not higher than the top surface of aviation baffle, the cold water pipe with the top surface of induced draft board supports in and the large tracts of land cover is located print platform the bottom surface of conveyer belt.
Further, the air suction cavity is the air suction platform;
the cooling system further comprises an air cooling device;
The air cooling device is arranged below the output end of the printing platform and is arranged adjacent to the front end of the air suction cavity, and the air cooling device comprises a cooling cavity, a cross-flow fan, an air guide cover and a cold air input pipe;
The output end of the cold air input pipe is upwards communicated with the bottom of the cooling cavity, and the input end of the cold air input pipe is connected with an external air conditioner to input cooling air;
At least one cross flow fan is arranged in the cooling cavity, the output end of the top of each cross flow fan is upwards communicated with the bottom of the corresponding air guide cover, and the input end of the side face of the cross flow fan is communicated with the output end of the cold air input pipe through the inner cavity of the cooling cavity;
The top of wind scooper upwards extends and exposes in the top of cooling cavity, the top surface of wind scooper is equipped with a plurality of wind guide openings, and is a plurality of the wind guide openings along the direction interval arrangement that is perpendicular to the conveyer belt operation, a plurality of the wind guide openings are close to being located the bottom surface of conveyer belt below the print platform.
Further, the air cooling device further comprises a plurality of guide plates;
The air guide cover is arranged above the air guide opening, the left side, the right side and the front side of the air guide plate extend downwards to enclose the air guide opening, the left side, the right side and the front side of the air guide plate are connected to the top surface of the air guide cover, a gap is reserved between the bottom surface of the rear side of the air guide plate and the top surface of the rear side of the air guide opening, and the plate surface of the air guide plate extends upwards obliquely backwards;
A plurality of guide plates cover the bottom surface of the conveyor belt;
the air cooling device further comprises a fixed connecting plate, a sealing strip adjusting plate and a sealing strip;
The inner side surfaces of the two fixed connecting plates are respectively arranged at the left side and the right side of the cooling cavity, and the top surfaces of the fixed connecting plates are used for being fixed below the front end of the printing platform;
The two strip-shaped sealing strip adjusting plates are respectively arranged on and cover the tops of the front end face and the rear end face of the cooling cavity, the lower half part of the inner side face of the sealing strip adjusting plate is propped against the front end face or the rear end face of the cooling cavity, and the upper half part of the inner side face of the sealing strip adjusting plate is recessed outwards to form an installation groove; the sealing strip adjusting plate can move up and down along the front end surface or the rear end surface of the cooling cavity;
The sealing strip is arranged in the mounting groove and moves up and down along with the sealing strip adjusting plate; the top of the sealing strip is elastically propped against the bottom surface of the conveyor belt;
the top of the sealing strip is provided with a shielding edge extending inwards;
the top surface of the shielding edge is elastically propped against the bottom surface of the conveyor belt.
Further, a front driving roller is arranged near the front end of the air cooling device, and the front driving roller is arranged at the front end of the printing platform;
The front driving roller is provided with a motor, a roller, a speed reducer, a self-aligning roller bearing, a bearing sleeve, a torque arm support column, a tension ring and a tension sleeve;
The motor is positioned at the left end of the front driving roller, the right end of the motor is in transmission connection with the left end of the speed reducer, and the right end of the speed reducer is in transmission connection with the left end of the roller; a clasping connection structure matched with the tensioning sleeve is arranged at the joint of the right end of the speed reducer and the left end of the roller;
the inner side surfaces of the two self-aligning roller bearings are respectively the outer side surfaces of the left end and the right end of the roller, and the outer side surfaces of the self-aligning roller bearings are sleeved on the bearing sleeve; the two bearing sleeves are arranged at the front end of the printing platform in a supporting way;
The upper end of one torque arm supports the bottom of the speed reducer, the upper end of the other torque arm supports the bottom of the bearing sleeve positioned at the left end of the roller, and the rear edges of the two torque arms are both arranged below the printing platform;
The torque arm support column is arranged between the bottoms of the two torque arms, the right end of the torque arm support column is connected with the bottom of the torque arm for supporting the bearing sleeve, the left end of the torque arm support column penetrates through the bottom of the other torque arm for supporting the speed reducer, the inner side surface of the tension ring is sleeved on the outer side surface of the left end of the torque arm support column, and the outer side surface of the tension ring is propped against the bottom of the other torque arm;
The conveyor belt bypasses the upper roll surface, the front roll surface and the lower roll surface of the roller from above and then enters the upper part of the air cooling device.
The technical scheme of the invention has the beneficial effects that: the digital ink-jet printing system compatible with film printing can print printing media of plates, film rolls and the like, and can enable the printing media to be adsorbed on the top surface of a conveying belt of a printing plane through an air suction platform, so that the digital ink-jet printing system is good in compatibility and printing quality; in addition, the cooling system can continuously cool the bottom surface and the top surface of the conveyor belt, ensures that the printing medium cannot be deformed by heat in the printing process, and can stabilize the solidification effect of printing ink.
Drawings
FIG. 1 is a front view of the overall structure of one embodiment of a film-printing compatible digital ink jet printing system of the present invention;
FIG. 2 is a schematic structural view of a film laminating unit according to an embodiment of the invention;
FIG. 3 is a schematic view of the film orientation of the film attachment unit in an upper station according to one embodiment of the present invention;
FIG. 4 is a schematic view of the film orientation of the film attachment unit of one embodiment of the present invention in the lower station;
FIG. 5 is a schematic diagram of the structure of a membrane-lifting unit according to one embodiment of the invention;
FIG. 6 is a schematic view of the film orientation of an embodiment of the present invention when the film forming unit is in operation;
FIG. 7 is a schematic plan view of a water cooling apparatus according to an embodiment of the present invention;
FIG. 8 is a schematic view of the radial flow of cooling water in a cooling water circulation loop of a water cooling device according to an embodiment of the present invention;
Fig. 9 is a partial enlarged view of a portion a in fig. 7;
FIG. 10 is a schematic view of an air cooling device according to an embodiment of the present invention;
fig. 11 is a schematic cross-sectional structure of an air cooling device according to an embodiment of the present invention;
fig. 12 is a partial enlarged view of a portion B in fig. 10;
FIG. 13 is a schematic cross-sectional view of a front drive roller of an embodiment of the invention;
Wherein: a coil stock winding and unwinding mechanism 1; a film conveying device 2; a printing platform 3; a board conveying mechanism 4; a film 5; a conveyor belt 6; a cooling system 7; a curing module 8; an air suction platform 9; lifting the suspension cage 10; an unreeling device 11; a winding device 12; an inkjet printhead 101; a film sticking unit 21; a film-forming unit 22; a plate feeding platform 41; a discharge plate platform 42; a front driving roller 61; a water cooling device 71; an air cooling device 72; a primary curing unit 81; a reinforcement curing unit 82; a final curing unit 83; a first mounting base 211; a first elevating device 212; a first guide roller 213; a film laminating roller 214; a first reinforcing roller 215; a first rotating side plate 216; a second mounting base 221; a second elevating device 222; a second guide roller 223; a second reinforcing roller 225; a second rotating side plate 226; a base adjustment aperture 2110; mounting a side plate 2111; a cavity 21111 is avoided; a lifting rail 2121; a cylinder 2122; a cylinder mounting plate 2123; a connection block 2124; limit adjusting screw 2125; an angle adjustment hole 2161; mounting the adjustment hole 2162;
A cold water pipe 711; a water inlet pipe 712; an air suction plate 713; a water outlet pipe 714; a water outlet 7121; suction holes 7131; a water inlet 7171; a cooling chamber 721; a cross flow fan 722; a wind scooper 723; a fixed connection plate 724; a seal strip adjustment plate 725; a seal bar 726; a cold air input tube 727; a deflector 728; an air guide 7231; mounting groove 7251; and shielding edge 7261.
Detailed Description
The technical scheme of the invention is further described below by means of specific embodiments in combination with the accompanying drawings 1-13.
The drawings are for illustrative purposes only and are not to be construed as limiting the present patent; for the purpose of better illustrating the embodiments, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the actual product dimensions; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, 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; the two elements may be directly connected or indirectly connected through an intermediate medium, so to speak, the two elements are communicated internally. It will be understood by those of ordinary skill in the art that the terms described above are in the specific sense of the present invention.
In the description of the present invention, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present invention; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.
A digital ink-jet printing system compatible with film printing is provided with a printing platform 3, a conveyor belt 6 for conveying printing media is sleeved on the outer side surface of the printing platform 3, an air suction platform 9 is arranged below the printing platform 3, and the digital ink-jet printing system comprises a coil stock winding and unwinding mechanism 1, a film conveying device 2 and a plate conveying mechanism 4;
The plate conveying mechanism 4 comprises a plate feeding platform 41 and a plate discharging platform 42, and the plate feeding platform 41 and the plate discharging platform 42 are respectively arranged at the rear and the front of the printing platform 3; the board feeding platform 41 conveys the paper card or sheet type printing medium to the top surface of the conveyor belt 6, enters the printing platform 3 and is absorbed to the top surface of the conveyor belt 6 on the printing plane by the air suction platform 9, and the printed paper card or sheet type printing medium is continuously conveyed to the board discharging platform 42 by the conveyor belt 6 to be output;
The coil stock winding and unwinding mechanism 1 comprises an unwinding device 11 and a winding device 12, wherein the unwinding device 11 is arranged above the plate feeding platform 41, and the winding device 12 is arranged above the plate discharging platform 42;
The film conveying device 2 comprises a film pasting unit 21 and a film lifting unit 22, wherein the left side and the right side of the film pasting unit 21 are arranged on the left side and the right side of the rear end of the printing platform 3 in a rack manner, and the left side and the right side of the film lifting unit 22 are arranged on the left side and the right side of the front end of the printing platform 3 in a rack manner;
The coil stock of printing medium of film material coil stock class is installed in unreeling device 11, unreeling device 11 opens a book output film 5, film 5 passes through pad pasting unit 2 is leading-in print platform 3, and by induced draft platform 9 adsorb in the top surface of printing planar conveyer belt 6, after the printing film 5 follows conveyer belt 6 is through play membrane unit 22 export to coiling mechanism 1 is the coil stock.
As shown in FIG. 1, the digital ink-jet printing system capable of compatible film printing of the invention can print both printing media of plate materials and printing media of film material rolls, and can enable the printing media to be adsorbed on the top surface of a conveying belt 6 of a printing plane through an air suction platform 9, so that the digital ink-jet printing system not only has good compatibility, but also has good printing quality.
Further, the film laminating unit 21 includes a first mounting base 211, a first lifting device 212, a first guide roller 213 and a film laminating roller 214;
The two first mounting bases 211 are respectively mounted on the left side and the right side of the front end of the printing platform 3, the two first lifting devices 212 are respectively mounted on opposite inner side surfaces of the two first mounting bases 211, two ends of the first guide roller 213 are respectively rotatably mounted on the top of opposite inner side surfaces of the two first mounting bases 211, two ends of the two film laminating press rollers 214 are respectively connected with the output ends of the two first lifting devices 212, the first guide roller 213 is positioned above the film laminating press rollers 214, the first lifting devices 212 drive the film laminating press rollers 214 to descend, and the lower roller surface of the film laminating press rollers 214 is close to the top surface of the printing platform 3;
the film lifting unit 22 is installed on the left side and the right side of the rear end of the printing platform 3, the film lifting unit 22 is provided with a film lifting press roller 324, and the lower roller surface of the film lifting press roller 324 is flush with the lower roller surface of the film pasting press roller 214.
As shown in fig. 1-2, a conveyor belt 6 for conveying a film 5 is sleeved on the outer side surface of a printing platform 3, a winding device 12 and an unwinding device 11 are respectively arranged at the front end and the rear end of the printing platform 2, a film coil to be printed is arranged on the unwinding device 11, the film 5 is output from the unwinding device 11, then the film 5 bypasses the upper roller surface and the front roller surface of a first guide roller 213 from the upper side of the first guide roller 213, bypasses the rear roller surface and the lower roller surface of a film laminating roller 214 from the upper side of the film laminating roller 214 and enters the printing platform 3, and the film 5 printed on the printing platform 3 enters the lower side of a film lifting roller 324 from the front end of the printing platform 3, and then bypasses the lower roller surface and the front roller surface of the film lifting roller 324 and enters the winding device 12; the lower roll surface of the film pasting compression roller 214 and the lower roll surface of the film lifting compression roller 324 are both close to the top surface (namely the printing plane) of the printing platform 3, and the film 5 is flattened and attached to the surface of the conveying belt 6 to move forwards through the adsorption of the air suction platform arranged below the printing platform 3, so that the pattern quality of continuous printing of the film 5 can be effectively ensured.
The distance between the lower roller surface of the laminating roller 214 and the plane of the top surface of the printing platform 3 can be adjusted by the first lifting device 212 so as to adapt to printing of film materials with different thicknesses, and the laminating roller 214 can be lifted away from the printing platform by the first lifting device 212.
Further, the first mounting base 211 is provided with a mounting side plate 2111;
An oval cavity 21111 is formed in the middle of the mounting side plate 2111, the two mounting side plates 2111 are respectively mounted on opposite inner side surfaces of the two first mounting bases 211, an outer side surface of the bottom of the mounting side plate 2111 is connected with an inner side surface of the first mounting base 211, and the top of the mounting side plate 2111 extends obliquely upwards forwards along the printing running direction;
The first lifting device 212 comprises a lifting guide rail 2121, a cylinder 2122, a cylinder mounting plate 2123, a connecting seat 2124 and a limiting adjusting screw 2125;
the two lifting rails 2121 are respectively installed near the front and rear sides of the outer side surface of the installation side plate 2111, and the front and rear sides of the connecting seat 2124 are respectively slidably installed on the opposite inner side surfaces of the two lifting rails 2121; the cylinder mounting plate 2123 is mounted on top of the mounting side plate 2111, and the cylinder 2122 is mounted on the outer side surface of the cylinder mounting plate 2123; the output end of the cylinder 2122 is connected with the top end of the connecting seat 2124 in a transmission way;
Any one of the left and right ends of the laminating roller 214 is rotatably mounted on the connection seat 2124 through the avoidance cavity 21111;
the cylinder 2122 drives the two connecting seats 2124 to drive the left and right ends of the laminating roller 214 to move up and down in the avoidance cavity 21111;
Two spacing accommodate lead screws 2125 are installed in the front and back both sides of cylinder 2122, spacing accommodate lead screw 2125's lower extreme threaded connection in the top of connecting seat 2124.
As shown in fig. 2, the distance between the lower roll surface of the laminating roller 214 and the printing plane can be controlled by controlling the positions of the left and right ends of the laminating roller 214 by controlling the stroke of the cylinder 2122.
As shown in fig. 2, the film 5 is close to and even with the printing plane, the inkjet printhead 10101 is reduced and as close to the printing plane as possible, so that the printing precision can be further improved, and the spacing between the film laminating roller 214 and the printing plane can be precisely fine-tuned by the limiting adjusting screw 2125, so as to meet the performance requirement of high-precision printing quality.
Further, a first rotating side plate 216 and a first reinforcing roller 215 are also included;
the outer side surfaces of one end of the two first rotating side plates 216 are rotatably mounted on the inner side surfaces of the two cylinder mounting plates 2123, respectively, and the left and right ends of the first guide roller 213 are rotatably mounted on the inner side surfaces of the other end of the two first rotating side plates 216;
the left and right ends of the hollow first reinforcing roller 215 respectively abut against two opposite inner side surfaces of one end of the two first rotating side plates 216;
The first rotating side plate 216 is provided with an angle adjustment hole 2161 and a mounting adjustment hole 2162;
the plurality of mounting adjustment holes 2162 penetrate through the plate surface of the first rotating side plate 216 from left to right, the plurality of mounting adjustment holes 2162 are distributed at intervals on the plate surface of the first rotating side plate 216, two mounting adjustment holes 2162 corresponding to each other from left to right are in a group, and each group of mounting adjustment holes 2162 can be used for mounting the left end and the right end of the first guide roller 213;
A plurality of arc-shaped angle adjusting holes 2161 positioned at the same circumference are wound around the joint of the first rotating side plate 216 and the first reinforcing roller 215, the angle adjusting holes 2161 are detachably mounted at one end of a fastener, and the other end of the fastener is detachably fixed to the cylinder mounting plate 2123;
the first mounting base 211 is further provided with a plurality of base adjustment holes 2110;
The base adjusting holes 2110 penetrate through the first mounting base 211 from top to bottom, the base adjusting holes 2110 are divided into two groups and are arranged along the front-rear direction, adjusting screw rods are mounted in the base adjusting holes 2110, and the bottom ends of the adjusting screw rods are propped against the mounting surface of the first mounting base 211.
As shown in fig. 2-4, pushing the other end of the first rotating side plate 216 may drive the first guide roller 213 to rotate 360 degrees along the center point where one end of the first rotating side plate 216 is connected with the cylinder mounting plate 2123, so as to adjust the included angle between the connecting line of the axis of the first guide roller 213 and the axis of the laminating roller 214 and the plane where the printing plane is located, adjust the angle (commonly known as the wrap angle) of the peripheral angle coated by the film 5 and the roller surface of the laminating roller 214, and increase the wrap angle of the film 5 and the roller surface of the laminating roller 214, increase the contact area of the film 5 and the roller surface of the laminating roller 214, increase the spreading flatness of the film 5, and prevent the film 5 from wrinkling during printing, so that the flatness and printing precision of the film 5 can be improved by adjusting the wrap angle.
The laminating roller 214 in fig. 3 is in the upper position, where the film 5 is introduced into the film feeding device for mounting, and the laminating roller 214 is located away from above the printing plane and at a relatively high level.
In fig. 4, the laminating roller 214 is at the lower station, the lower roller surface of the laminating roller 214 is at the same level as the printing plane, and the film 5 is attached to the printing plane.
As shown in fig. 2 to 4, the first reinforcing roller 215 is installed between the two first rotating side plates 216, and both left and right ends of the first reinforcing roller 215 are made to abut against both inner sides of one ends of the two first rotating side plates 216 from inside, so that not only the structural rigidity of the entire film conveying apparatus 2 but also the running stability of the first rotating side plates 216 and the laminating roller 214 can be improved.
The hollow first reinforcing roller 215 is also provided inside for pipe penetration, which can facilitate the arrangement and connection of the air supply line and the cable of the cylinders on both sides.
As shown in fig. 2-3, the first guide roller 213 is mounted at two mounting adjustment holes 2162 of different groups, so that the first guide roller 213 has different rotation radii to meet different use requirements.
One end of the first rotating side plate 216 is locked by the angle adjusting hole 2161 and the fastener installed therein, thereby locking the relative position of the first guide roller 213 and the laminating roller 214, and thus locking the wrap angle of the film 5 on the roller surface of the laminating roller 214.
As shown in fig. 2-3, the relative position of the first mounting base 211 to the print plane is adjustable by rotating the screw in the mounting base adjustment hole 2110, thereby fine tuning the spacing of the laminating roller 214 from the print plane.
Further, the film forming unit 22 further includes a second mounting base 221, a second lifting device 222, a second guide roller 223, a second reinforcing roller 225, and a second rotating side plate 226;
the second mounting base 221, the second lifting device 222, the second guide roller 223, the film-lifting press roller 324, the second reinforcing roller 225 and the second rotating side plate 226 have the same structure as the first mounting base 211, the first lifting device 212, the first guide roller 213, the film-sticking press roller 214, the first reinforcing roller 215 and the first rotating side plate 216, respectively, in one-to-one correspondence;
The film laminating press roller 214 introduces the film 5 to be printed to the printing platform 3 through the first guide roller 213 which is in butt joint with the unreeling device 11, and the film lifting press roller 324 guides the film 5 which is finished being printed from the printing platform 3 to the reeling device 12 through the second guide roller 223 which is in butt joint with the reeling device 12.
As shown in fig. 5 to 6, the film lifting unit 22 includes a second mounting base 221, a second lifting device 222, a second guide roller 223, a second reinforcing roller 225 and a second rotating side plate 226 which have the same component structure as the film sticking unit 21, and the gap between the printed film 5 and the printing platform 3 and the wrap angle between the second guide roller 223 and the film 5 are adjusted by the second guide roller 223 and the film sticking roller 214 in the film lifting unit 22, so that the tension force of the film 5 attached to the film sticking roller 214 can be indirectly adjusted, the overlarge tension force is avoided, the deformation of the film 5 can be effectively avoided, and the printing quality of the inkjet printer using the film conveying device for the digital inkjet printer is ensured.
Preferably, the first guide roller 213 and the film laminating roller 214 are rubber rollers, and the surfaces of the first guide roller 213 and the film laminating roller 214 are elastic and have good friction force, so that the film 5 can be fully flattened on the roller surfaces of the first guide roller 213 and the film laminating roller 214, and the film 5 attached to the conveyor belt 6 is effectively prevented from wrinkling.
Preferably, the roll surfaces of the second guide roll 223 and the film-forming press roll 324 are made of aluminum alloy or other alloy roll materials, and compared with a rubber roll, the surface is smoother, the printed pattern is less prone to abrasion, and the quality of the output product is guaranteed.
Further, the device also comprises a solidification module 8, a plurality of lifting cages 10 and a cooling system 7;
A plurality of lifting cages 10 are installed above the printing platform 3 at intervals, and a plurality of inkjet printheads 101 are installed below the lifting cages 10;
The curing module 8 comprises a primary curing unit 81, a reinforcing curing unit 82 and a final curing unit 83;
the primary curing unit 81 is installed near the front of the operation of the inkjet printing head 101, the reinforcing curing unit 82 is installed between two adjacent lifting cages 10, and the final curing unit 83 is installed at the front of the operation of the last lifting cage 10;
the primary curing unit 81, the reinforcing curing unit 82 and the final curing unit 6 each include a plurality of UV lamps arranged in a direction perpendicular to a printing running direction; the UV lamp irradiates downwards on a printing plane;
The cooling system 7 comprises a water cooling device 71;
the water cooling device 71 comprises a plurality of cold water pipes 711, wherein the plurality of cold water pipes 711 extend along the printing running direction, the plurality of cold water pipes 711 are arranged along the direction parallel to the printing running direction, and the top surfaces of the plurality of cold water pipes 711 are propped against and cover the bottom surface of the conveyor belt 6 positioned on the printing platform 3;
The front and rear ends of the cold water pipe 711 are respectively communicated with an output port and an input port of an external cold water circulation system.
As shown in fig. 1 and 7-9, the primary curing unit 81, the reinforcing curing unit 82 and the final curing unit 6 of the digital inkjet printing system capable of compatible film printing according to the present invention each include a plurality of UV lamps which irradiate downwards on a printing plane, and the ink printed on the surface of the film 5 is heated and cured step by step in a segmented manner, so that good printing quality is obtained, and the surface of the conveyor belt 6 is continuously heated after being irradiated by the UV lamps during printing, if the conveyor belt 6 is not cooled in time and the whole temperature of the conveyor belt 6 is continuously prevented from rising, the conveyor belt 6 is heated and deformed, the circulating cooling water flowing in the cold water pipe 711 can continuously perform heat exchange with the bottom surface of the conveyor belt 6 through the pipe wall of the cold water pipe 711, so that the conveyor belt 6 is prevented from being heated and deformed, and printing medium is prevented from being heated and deformed, and the printing ink is prevented from being cured too fast, and the printing precision of the product is ensured.
Further, the water cooling device 71 further comprises an air suction plate 713, an air suction cavity, a water inlet pipe 712 and a water outlet pipe 714;
The plurality of air suction plates 713 extend along the printing running direction, the plurality of cold water pipes 711 and the plurality of air suction plates 713 are mutually arranged at intervals along the direction parallel to the printing running direction, the left and right sides of the air suction plates 713 are respectively connected with the outer walls of the two cold water pipes 711 adjacent to each other, and the top surfaces of the plurality of cold water pipes 711 and the plurality of air suction plates 713 are propped against and cover the bottom surface of the conveyor belt 6 positioned on the printing platform 3; the plurality of cold water pipes 711 and the plurality of air suction plates 713 are positioned at the top of the air suction cavity;
Along the printing running direction, a plurality of air suction holes 7131 are arranged on the surface of the air suction plate 713 at intervals, the air suction holes 7131 are downwards communicated with the input end of the air suction cavity, and the output end of the air suction cavity is communicated with the input port of an external exhaust fan;
The water inlet pipe 712 and the water outlet pipe 714 are respectively positioned at the front end and the rear end of the cold water pipe 711; the input end of the water inlet pipe 712 is communicated with an output port of an external cold water circulation system; the output end of the water outlet pipe 714 is communicated with an input port of an external cold water circulation system;
The water inlet pipe 712 is provided with a water outlet 7121, the water outlet 7121 is positioned at one side of the water inlet pipe 712 close to the cold water pipe 711, and the water outlet 7121 is communicated with one end of the cold water pipe 711;
The water outlet pipe 714 is provided with a plurality of water inlets 7171, the water inlets 7171 are positioned at one side of the water outlet pipe 714 close to the cold water pipe 711, and the water inlets 7171 are communicated with the other end of the cold water pipe 711;
The cold water pipe 711, the water inlet pipe 712 and the water outlet pipe 714 are square pipes, the top surfaces of the cold water pipe 711, the water inlet pipe 712 and the water outlet pipe 714 are not higher than the top surface of the air suction plate 713, and the top surfaces of the cold water pipe 711 and the air suction plate 713 are abutted against and cover the bottom surface of the conveyor belt 6 of the printing platform 3 in a large area.
As shown in fig. 1 and 7-9, the digital ink-jet printing system compatible with film printing of the present invention not only includes a cold water pipe 711, but also includes a plurality of air suction holes 7131 communicated with an exhaust fan, and can effectively enhance air convection on the bottom surface of the conveyor belt 6 through the air suction holes 7131, further improve the cooling effect of the conveyor belt 6, and can also generate an adsorption force on a printing medium located on the printing platform 3 through the air suction holes 7131, so that the printing medium is attached to the upper surface of the conveyor belt 6, thereby improving the stability of the printing medium in the printing process, and further improving the printing precision.
Compared with the cooling mode of directly wiping water on the surface of the conveyor belt 6, the water cooling and air cooling mode used by the water cooling device 71 of the invention can not directly leave water on the surface of the conveyor belt 6, can prevent the residual water from leaking to the transmission equipment through the air suction holes of the conveyor belt 6, and can avoid the belt slipping of the transmission equipment, thereby avoiding affecting the printing precision.
As shown in fig. 7 to 9, the rapid flowing circulating cooling water through each cold water pipe 711 can be ensured by the water inlet pipe 712 and the water outlet pipe 714 which are communicated with the outlet of the external cold water circulating system, thereby ensuring the cooling effect of the digital ink jet printing system compatible with film printing on the conveyor belt 6.
As shown in fig. 7 and 9, the cold water pipe 711, the water inlet pipe 712 and the water outlet pipe 714 are square pipes, and the top surfaces of the cold water pipe 711, the water inlet pipe 712, the water outlet pipe 714 and the air suction plate 713 are flush to form a horizontal plane and are abutted against the bottom surface of the conveyor belt 6, so that the contact area between the digital ink-jet printing system compatible with film printing and the conveyor belt 6 can be enlarged to the greatest extent, and the conveyor belt 6 can obtain a better cooling effect.
As shown in fig. 8, in another embodiment, a plurality of cold water pipes 711 are arranged in three cooling water circulation loops from left to right, each of which is respectively communicated with an external cold water circulation system, and each forms a circulation flow, wherein the travel length of the middle cooling water circulation loop is only half of that of the other loops, and therefore, the conveyor belt 6 in the middle area has a relatively better cooling water cooling effect.
Since the conveyor belt 6 located in the middle region is not in contact with the surrounding space, the heat is relatively more difficult to diffuse, and the heat and temperature in the middle region of the conveyor belt 6 are higher, so that shortening the stroke length of the cooling water circulation loop located in the middle region according to the above method can be more beneficial to improving the cooling speed in the condition that the heat and temperature in the middle region of the conveyor belt 6 are higher.
The water path on-site travel of the cooling water circulation loop in the central area is short, and the water path on-site travel of the cooling water circulation loop far away from the central area is longer, so that the temperature distribution of the conveyor belt 6 of the whole printing platform 3 can be more balanced, printing media, especially printing media made of thin film materials, are prevented from wrinkling due to uneven heating, and therefore the printing quality is prevented from being influenced.
Further, the air suction cavity is the air suction platform 9;
the cooling system 7 further comprises an air cooling device 72;
The air cooling device 72 is installed below the output end of the printing platform 3, the air cooling device 72 is arranged adjacent to the front end of the air suction cavity, and the air cooling device 72 comprises a cooling cavity 721, a cross-flow fan 722, an air guide cover 723 and a cold air input pipe 727;
the output end of the cold air input pipe 727 is upwards communicated with the bottom of the cooling cavity 721, and the input end of the cold air input pipe 727 is connected with an external air conditioner to input cooling air;
At least one through-flow fan 722 is installed in the cooling cavity 721, an output end at the top of each through-flow fan 722 is upwards communicated with the bottom of the corresponding air guide cover 723, and an input end at the side surface of the through-flow fan 722 is communicated with an output end of the cold air input pipe 727 through an inner cavity of the cooling cavity 721;
The top of the air guide cover 723 extends upwards and is exposed above the cooling cavity 721, the top surface of the air guide cover 723 is provided with a plurality of air guide openings 7231, the plurality of air guide openings 7231 are arranged at intervals along the direction perpendicular to the running direction of the conveyor belt 6, and the plurality of air guide openings 7231 are close to the bottom surface of the conveyor belt 6 below the printing platform 3.
As shown in fig. 1, the water cooling device 71 is combined with the air suction platform 9, so that the printing stock (i.e. printing medium) can be adsorbed on the conveyor belt 6, and meanwhile, the conveyor belt 6 can be cooled in the process of conveying the printing stock, so that the cost for modifying the equipment in the prior art is lower, and the universality is better.
As shown in fig. 1 and 10-12, a final curing unit 8 is disposed at the output end of the printing platform 3, and the final curing unit 8 is used for completely curing the printed final pattern, so that the power of a plurality of UV lamps included in the final curing unit is high, the conveyor belt 6 at the moment has gone out of the working area of the water cooling device 71, the conveyor belt 6 needs to be cooled by the air cooling device 72 below the output end of the printing platform 3, so that the surface temperature of the conveyor belt 6 is not increased continuously, the conveyor belt 6 leaves the front end of the printing platform 3 and runs backwards through the front roll surface of the front driving roller, and goes above the cold air device 72; when the cross-flow fan 722 in the air cooling device 72 is not started, the inner cavity of the cooling cavity 721 is not communicated with the air guide cover 723, the inner cavity of the cooling cavity 721 is continuously input with cooling air produced by an external air conditioner through the cold air input pipe 727, and the cooling cavity 721 stores the cooling air with the temperature obviously lower than that of the external air conditioner; when the through-flow fan 722 is started, the cooling air output by the air guide 7231 can rapidly reduce the temperature of the bottom surface of the conveyor belt 6 positioned below the printing platform 3, and when the cooled conveyor belt 6 returns to the upper part of the printing platform 3 again through the rear driving roller and enters the printing plane, the top surface of the conveyor belt 6 is the bottom surface of the conveyor belt 6 above the cold air device, so that the cooling is already obtained, the film contacted with the conveyor belt 6 can be prevented from being heated, deformed and wrinkled, and the printing ink can be prevented from being solidified too fast, therefore, the digital ink-jet printing system compatible with film printing has good solidifying efficiency, can avoid the heating deformation of conveying facilities and printing media, and has good running stability.
The cross flow fan 722 has the characteristics of small volume and large flow, and the cross flow fan 722 is arranged at a position close to the conveyor belt 6, so that the wind speed of cooling wind between the air cooling device 72 and the conveyor belt 6 is high, and the cooling capacity is high, and the cooling efficiency of the air cooling device 72 is further enhanced by the cooling air after being subjected to cold accumulation in the inner cavity of the cooling cavity 721, so that the conveyor belt 6 can be rapidly cooled.
The curing module of the present invention is divided into an initial curing unit 81, a reinforcing curing unit 82 and a final curing unit 83, each of which employs a UV lamp: the primary curing unit 81 is mounted on the bottom plate of the nozzle, each nozzle corresponds to a UV lamp of the primary curing unit, and the distance between the two is very short, so that the diffusion degree of each ink dot after contacting the surface of the substrate can be limited to a very large extent, and the printing precision is very high. The power of the UV lamp of the primary curing unit is small only to improve printing accuracy without completely curing the pattern. The power of the UV lamp of the reinforcing curing unit 82 is not too high after the reinforcing curing unit 82 is disposed in each color channel, so that the patterns of the corresponding colors can reach the semi-cured state and can be mutually fused with the colors printed later to generate the color overlapping effect. The final curing unit 83 is a single or a plurality of curing unit groups, which uses a high power of UV lamps in order to enable the printed final pattern to be completely cured.
Further, the air cooling device 72 further includes a plurality of flow deflectors 728;
The air deflector 728 is installed above the air guide opening 7231, both the left and right sides and the front side of the air deflector 728 extend downwards to enclose the air guide opening 7231, both the left and right sides and the front side of the air deflector 728 are connected to the top surface of the air guide cover 723, a gap is reserved between the bottom surface of the rear side of the air deflector 728 and the top surface of the rear side of the air guide opening 7231, and the plate surface of the air deflector 728 extends backwards and obliquely upwards;
A plurality of the guide plates 728 cover the bottom surface of the conveyor belt 6;
The air cooling device 72 further comprises a fixed connection plate 724, a sealing strip adjusting plate 725 and a sealing strip 726;
The inner side surfaces of the two fixing connection plates 724 are respectively arranged at the left side and the right side of the cooling cavity 721, and the top surface of the fixing connection plate 724 is used for being fixed below the front end of the printing platform 3;
The two strip-shaped sealing strip adjusting plates 725 are respectively installed on and cover the top of the front end face and the rear end face of the cooling cavity 721, the lower half part of the inner side surface of the sealing strip adjusting plate 725 abuts against the front end face or the rear end face of the cooling cavity 721, and the upper half part of the inner side surface of the sealing strip adjusting plate 725 is recessed outwards to form an installation groove 7251; the seal strip regulating plate 725 may move up and down along the front end surface or the rear end surface of the cooling cavity 721;
The sealing strip 726 is mounted in the mounting groove 7251, and the sealing strip 726 moves up and down along with the sealing strip adjusting plate 725; the top of the sealing strip 726 is elastically propped against the bottom surface of the conveyor belt 6;
the top of the sealing strip 726 is provided with a shielding edge 7261 extending towards the inner side;
the top surface of the shielding edge 7261 is elastically abutted against the bottom surface of the conveyor belt 6.
As shown in fig. 1 and 10-12, in the air cooling device 72 of the present invention, the cooling air outputted from the air guide openings 7231 is guided by the air guide plates 728 to be blown to the bottom surface of the conveyor belt 6 in a backward and obliquely upward direction, the conveyor belt 6 moves from front to back, and the cooling air can keep heat exchange with the conveyor belt 6 along with the conveyor belt 6 in the range of the top of the air guide cover 723, and the cooling air guided by the plurality of air guide plates 728 arranged in series is superposed and continuously exchanges heat with the conveyor belt 6, so that the cooling mode of blowing cold air directly upward by the air guide openings 7231 has longer action time and better effect.
In the embodiment shown in fig. 6, three sets of deflectors 728 are provided at the top of the cooling chamber 721, and three cross-flow fans 722 and three air hoods 723 are correspondingly provided.
As shown in fig. 10-12, the left and right ends of the air cooling device 72 are fixed below the front end of the printing platform 3 by two fixing connection plates 724, so that the air cooling device has better installation stability and operates more stably.
The top of the sealing strip 726 is elastically propped against the bottom surface of the conveyor belt 6, so that the gap between the top of the cooling cavity 721 and the bottom surface of the conveyor belt 6 can be covered by cooling air, and the loss of the cooling air from the gap between the top of the cooling cavity 721 and the bottom surface of the conveyor belt 6 is slowed down, so that the cooling air can be maintained for a longer time, and the cooling efficiency of the air cooling device is improved.
As shown in fig. 12, the inwardly extending shielding edge 7261 further reduces the gap between the top of the cooling cavity 721 and the bottom surface of the conveyor belt 6, thereby further reducing the loss of cooling air, and further reducing the cooling efficiency of the air cooling device for the digital inkjet printer.
In yet another embodiment, when the ambient temperature is high, especially in summer, the air cooling device 72 may be installed at both the output end and the input end of the printing platform 3, so that the conveyor belt 6 is cooled more fully before entering the printing plane, ensuring that the film contacting the top surface of the conveyor belt 6 is not deformed by heat, and preventing the printing ink from solidifying too fast, so as to ensure the printing accuracy of the digital ink-jet printer using the cold air device 3.
Further, a front driving roller 61 is further disposed near the front end of the air cooling device 72, and the front driving roller 61 is mounted at the front end of the printing platform 3;
the front driving roller 61 is provided with a motor 610, a roller 611, a speed reducer 612, a self-aligning roller bearing 613, a bearing housing 614, a torque arm 615, a torque arm support column 616, a tension ring 617 and a tension sleeve 618;
The motor 610 is located at the left end of the front driving roller 61, the right end of the motor 610 is in transmission connection with the left end of the speed reducer 612, and the right end of the speed reducer 612 is in transmission connection with the left end of the roller 611; a clasping connection structure matched with the tensioning sleeve 618 is arranged at the connection part of the right end of the speed reducer 612 and the left end of the roller 611;
The inner side surfaces of the two self-aligning roller bearings 613 are respectively the outer side surfaces of the left end and the right end of the roller 611, and the outer side surfaces of the self-aligning roller bearings 613 are sleeved on the bearing sleeves 614; the two bearing sleeves 614 are arranged at the front end of the printing platform 3 in a rack manner;
The upper end of one torque arm 615 supports the bottom of the speed reducer 612, the upper end of the other torque arm 615 supports the bottom of the bearing housing 614 positioned at the left end of the roller 611, and the rear sides of the two torque arms 615 are both arranged below the printing platform 3;
The torque arm support columns 616 are installed between bottoms of the two torque arms 615, right ends of the torque arm support columns 616 are connected with bottoms of the torque arms 615 supporting the bearing sleeves 614, left ends of the torque arm support columns 616 penetrate through bottoms of the other torque arms 615 supporting the speed reducers 612, inner side surfaces of the tension rings 617 are sleeved on outer side surfaces of left ends of the torque arm support columns 616, and outer side surfaces of the tension rings 617 are propped against bottoms of the other torque arms 615;
The conveyor belt 6 passes over the upper, front and lower roll surfaces of the roll drum 611 from above and then enters above the air cooling device 72.
As shown in fig. 1 and 13, the air suction platform 9 is installed below the printing platform 3, when the air suction platform 9 operates, a negative pressure area is arranged below the conveyor belt 6, atmospheric pressure can generate larger pressure on the conveyor belt 6, because the area of the air suction area is large, the tension born by the roller 611 is greatly increased, and the loads of the motor 610 and the speed reducer 612 are greatly increased, the connection part between the right end of the speed reducer 612 and the left end of the roller 611 is provided with a tightly-holding connection structure matched with the tensioning sleeve 618, and compared with the connection structure using screws or bolts, the tightly-holding connection structure matched with the tensioning sleeve 618 has higher torque transmission efficiency, so that the stress of the roller 611 is more uniform, the operation is smoother, and the service life is longer.
The self-aligning roller bearing 613 has better mechanical property, long service life, and more compact structure compared with the bearing with the seat, and saves the installation space.
The supporting structure of the torque arm support column 616 and the torque arm 615 which are vertically arranged can effectively improve the connection stability of the speed reducer 612 and the roller 611, reduce vibration and be beneficial to improving the printing quality.
The torque arm 615 is vertically installed, and the fixed fulcrum of the torque arm is located below the gravity centers of the motor 610 and the speed reducer 612, so that the shell of the speed reducer 612 can be prevented from rotating, the gravity moment of the motor 610 and the speed reducer 612 can be decomposed, and the strength of the whole transmission structure is enhanced.
In summary, as shown in fig. 1-13, the digital ink-jet printing system compatible with film printing can print both plate type printing media and film roll type printing media, and can make the printing media adsorbed on the top surface of the conveyor belt 6 of the printing plane through the air suction platform 9, so that the digital ink-jet printing system not only has good compatibility, but also has good printing quality; in addition, the cooling system can continuously cool the bottom surface and the top surface of the conveyor belt 6, ensure that the printing medium is not deformed by heat in the printing process, and stabilize the solidification effect of the printing ink.
The technical principle of the present invention is described above in connection with the specific embodiments. The description is made for the purpose of illustrating the general principles of the invention and should not be taken in any way as limiting the scope of the invention. Other embodiments of the invention will be apparent to those skilled in the art from consideration of this specification without undue burden.
Claims (7)
1. The digital ink-jet printing system compatible with film printing is provided with a printing platform, a conveying belt for conveying printing media is sleeved on the outer side surface of the printing platform, and an air suction platform is arranged below the printing platform, and is characterized by comprising a coil stock winding and unwinding mechanism, a film conveying device and a plate conveying mechanism;
The plate conveying mechanism comprises a plate feeding platform and a plate discharging platform which are respectively arranged at the rear and the front of the printing platform; the board feeding platform conveys paper card or sheet type printing medium to the top surface of the conveyor belt, enters the printing platform and is adsorbed on the top surface of the conveyor belt of the printing plane by the air suction platform, and the printed paper card or sheet type printing medium is continuously conveyed to the board discharging platform by the conveyor belt and is output;
The coil stock winding and unwinding mechanism comprises an unwinding device and a winding device, wherein the unwinding device is arranged above the plate feeding platform, and the winding device is arranged above the plate discharging platform;
The film conveying device comprises a film sticking unit and a film lifting unit, wherein the left side and the right side of the film sticking unit are arranged on the left side and the right side of the rear end of the printing platform in a supporting mode, and the left side and the right side of the film lifting unit are arranged on the left side and the right side of the front end of the printing platform in a supporting mode;
The film material coil is arranged on the unreeling device, the unreeling device unreels and outputs a film, the film is led into the printing platform through the film pasting unit and is adsorbed on the top surface of the conveyor belt of the printing plane by the air suction platform, and the printed film is led out to the reeling device through the film lifting unit along with the conveyor belt to be reeled into a coil;
the device also comprises a solidification module, a plurality of lifting cages and a cooling system;
the lifting cages are arranged above the printing platform at intervals, and the inkjet printing heads are arranged below the lifting cages;
the curing module comprises a primary curing unit, a reinforcing curing unit and a final curing unit;
The primary curing unit is arranged close to the front of the operation of the inkjet printing head, the reinforcing curing unit is arranged between two adjacent lifting cages, and the final curing unit is arranged in front of the operation of the last lifting cage;
The primary curing unit, the reinforcing curing unit and the final curing unit comprise a plurality of UV lamps which are arranged along the direction perpendicular to the printing operation direction; the UV lamp irradiates downwards on a printing plane;
the cooling system comprises a water cooling device;
The water cooling device comprises a plurality of cold water pipes, the plurality of cold water pipes extend along the printing running direction, the plurality of cold water pipes are arranged along the direction parallel to the printing running direction, and the top surfaces of the plurality of cold water pipes are propped against and cover the bottom surface of the conveyor belt positioned on the printing platform;
the front end and the rear end of the cold water pipe are respectively communicated with an output port and an input port of an external cold water circulation system;
the water cooling device also comprises an air suction plate, an air suction cavity, a water inlet pipe and a water outlet pipe;
The plurality of air suction plates extend along the printing running direction, the plurality of cold water pipes and the plurality of air suction plates are arranged at intervals along the direction parallel to the printing running direction, the left and right sides of the air suction plates are respectively connected with the outer walls of the two cold water pipes adjacent left and right, and the top surfaces of the plurality of cold water pipes and the plurality of air suction plates are propped upwards and cover the bottom surface of the conveyor belt positioned on the printing platform; the cold water pipes and the air suction plates are positioned at the top of the air suction cavity;
A plurality of air suction holes are arranged on the plate surface of the air suction plate at intervals along the printing running direction, the air suction holes are downwards communicated with the input end of the air suction cavity, and the output end of the air suction cavity is communicated with the input port of an external exhaust fan;
the water inlet pipe and the water outlet pipe are respectively positioned at the front end and the rear end of the cold water pipe; the input end of the water inlet pipe is communicated with an output port of an external cold water circulation system; the output end of the water outlet pipe is communicated with an input port of an external cold water circulation system;
the water inlet pipe is provided with a water outlet, the water outlet is positioned at one side of the water inlet pipe, which is close to the cold water pipe, and the water outlet is communicated with one end of the cold water pipe;
The water outlet pipe is provided with a plurality of water inlets, the water inlets are positioned at one side of the water outlet pipe, which is close to the cold water pipe, and the water inlets are communicated with the other end of the cold water pipe;
The cold water pipe, the water inlet pipe and the water outlet pipe are square pipes, the top surfaces of the cold water pipe, the water inlet pipe and the water outlet pipe are not higher than the top surface of the air suction plate, and the top surfaces of the cold water pipe and the air suction plate are propped against and cover the bottom surface of the conveyor belt of the printing platform in a large area;
the air suction cavity is the air suction platform;
the cooling system further comprises an air cooling device;
The air cooling device is arranged below the output end of the printing platform and is arranged adjacent to the front end of the air suction cavity, and the air cooling device comprises a cooling cavity, a cross-flow fan, an air guide cover and a cold air input pipe;
The output end of the cold air input pipe is upwards communicated with the bottom of the cooling cavity, and the input end of the cold air input pipe is connected with an external air conditioner to input cooling air;
At least one cross flow fan is arranged in the cooling cavity, the output end of the top of each cross flow fan is upwards communicated with the bottom of the corresponding air guide cover, and the input end of the side face of the cross flow fan is communicated with the output end of the cold air input pipe through the inner cavity of the cooling cavity;
The top of wind scooper upwards extends and exposes in the top of cooling cavity, the top surface of wind scooper is equipped with a plurality of wind guide openings, and is a plurality of the wind guide openings along the direction interval arrangement that is perpendicular to the conveyer belt operation, a plurality of the wind guide openings are close to being located the bottom surface of conveyer belt below the print platform.
2. The digital ink jet printing system compatible with film printing of claim 1 wherein the film attachment unit comprises a first mounting base, a first lifting device, a first guide roller, and a film attachment pressure roller;
The two first mounting bases are respectively mounted on the left side and the right side of the front end of the printing platform, the two first lifting devices are respectively mounted on the opposite inner side surfaces of the two first mounting bases, the two ends of the first guide roller are respectively rotatably mounted on the tops of the opposite inner side surfaces of the two first mounting bases, the two ends of the two film laminating press rollers are respectively connected with the output ends of the two first lifting devices, the first guide roller is positioned above the film laminating press rollers, the first lifting devices drive the film laminating press rollers to descend, and the lower roller surfaces of the film laminating press rollers are close to the top surface of the printing platform;
the film lifting unit is arranged on the left side and the right side of the rear end of the printing platform, the film lifting unit is provided with a film lifting press roller, and the lower roller surface of the film lifting press roller is flush with the lower roller surface of the film pasting press roller.
3. The digital inkjet printing system compatible with thin film printing according to claim 2 wherein the first mounting base is provided with a mounting side plate;
The middle part of the installation side plate is provided with an elliptical avoidance cavity, the two installation side plates are respectively installed on the opposite inner side surfaces of the two first installation bases, the outer side surface of the bottom of the installation side plate is connected with the inner side surface of the first installation base, and the top of the installation side plate extends forwards and obliquely upwards along the printing running direction;
The first lifting device comprises a lifting guide rail, an air cylinder mounting plate, a connecting seat and a limiting adjusting screw rod;
The two lifting guide rails are respectively arranged close to the front side and the rear side of the outer side surface of the installation side plate, and the front side and the rear side of the connecting seat are respectively and slidably arranged on the opposite inner side surfaces of the two lifting guide rails; the cylinder mounting plate is mounted on the top of the mounting side plate, and the cylinder is mounted on the outer side surface of the cylinder mounting plate; the output end of the air cylinder is downwards connected with the top end of the connecting seat in a transmission way;
Any one of the left end and the right end of the film pasting compression roller penetrates through the avoidance cavity and is rotatably arranged on the connecting seat;
the air cylinders drive the two connecting seats to drive the left end and the right end of the film pasting compression roller to move up and down in the avoidance cavity;
the two limit adjusting screw rods are arranged on the front side and the rear side of the air cylinder, and the lower ends of the limit adjusting screw rods are connected with the top of the connecting seat in a threaded mode.
4. The film printing compatible digital inkjet printing system of claim 3 further comprising a first rotating side plate and a first reinforcing roller;
the outer side surfaces of one ends of the two first rotating side plates are respectively rotatably arranged on the inner side surfaces opposite to the two cylinder mounting plates, and the left end and the right end of the first guide roller are rotatably arranged on the inner side surfaces of the other ends of the two first rotating side plates;
The left end and the right end of the hollow first reinforcing roller respectively prop against two opposite inner side surfaces of one end of the two first rotating side plates;
the first rotary side plate is provided with an angle adjusting hole and a mounting adjusting hole;
The installation adjusting holes penetrate through the plate surface of the first rotating side plate from left to right, the installation adjusting holes are distributed on the plate surface of the first rotating side plate at intervals, two installation adjusting holes corresponding to each other left and right are in a group, and each group of installation adjusting holes can be used for installing the left end and the right end of the first guide roller;
the plurality of arc-shaped angle adjusting holes positioned on the same circumference surround the joint of the first rotating side plate and the first reinforcing roller, the angle adjusting holes are detachably arranged at one end of a fastening piece, and the other end of the fastening piece is detachably fixed on the cylinder mounting plate;
The first mounting base is also provided with a plurality of base adjusting holes;
The base adjusting holes penetrate through the first mounting base from top to bottom, the base adjusting holes are divided into two groups and are arranged along the front-rear direction, adjusting screw rods are mounted in the base adjusting holes, and the bottom ends of the adjusting screw rods are propped against the mounting surface of the first mounting base.
5. The digital inkjet printing system compatible with thin film printing of claim 4 wherein the film lifting unit further comprises a second mounting base, a second lifting device, a second guide roller, a second reinforcing roller, and a second rotating side plate;
The structures of the second mounting base, the second lifting device, the second guide roller, the film lifting press roller, the second reinforcing roller and the second rotating side plate are respectively the same as those of the first mounting base, the first lifting device, the first guide roller, the film pasting press roller, the first reinforcing roller and the first rotating side plate in a one-to-one correspondence manner;
The film pasting press roll introduces a film to be printed to the printing platform through the first guide roll which is in butt joint with the unreeling device, and the film lifting press roll derives the film which is finished being printed from the printing platform to the reeling device through the second guide roll which is in butt joint with the reeling device.
6. The digital inkjet printing system compatible with thin film printing according to claim 1 wherein the air cooling device further comprises a plurality of baffles;
The air guide cover is arranged above the air guide opening, the left side, the right side and the front side of the air guide plate extend downwards to enclose the air guide opening, the left side, the right side and the front side of the air guide plate are connected to the top surface of the air guide cover, a gap is reserved between the bottom surface of the rear side of the air guide plate and the top surface of the rear side of the air guide opening, and the plate surface of the air guide plate extends upwards obliquely backwards;
A plurality of guide plates cover the bottom surface of the conveyor belt;
the air cooling device further comprises a fixed connecting plate, a sealing strip adjusting plate and a sealing strip;
The inner side surfaces of the two fixed connecting plates are respectively arranged at the left side and the right side of the cooling cavity, and the top surfaces of the fixed connecting plates are used for being fixed below the front end of the printing platform;
The two strip-shaped sealing strip adjusting plates are respectively arranged on and cover the tops of the front end face and the rear end face of the cooling cavity, the lower half part of the inner side face of the sealing strip adjusting plate is propped against the front end face or the rear end face of the cooling cavity, and the upper half part of the inner side face of the sealing strip adjusting plate is recessed outwards to form an installation groove; the sealing strip adjusting plate can move up and down along the front end surface or the rear end surface of the cooling cavity;
The sealing strip is arranged in the mounting groove and moves up and down along with the sealing strip adjusting plate; the top of the sealing strip is elastically propped against the bottom surface of the conveyor belt;
the top of the sealing strip is provided with a shielding edge extending inwards;
the top surface of the shielding edge is elastically propped against the bottom surface of the conveyor belt.
7. The digital ink jet printing system compatible with film printing according to claim 6, wherein a front driving roller is further arranged near the front end of the air cooling device, and the front driving roller is arranged at the front end of the printing platform;
The front driving roller is provided with a motor, a roller, a speed reducer, a self-aligning roller bearing, a bearing sleeve, a torque arm support column, a tension ring and a tension sleeve;
The motor is positioned at the left end of the front driving roller, the right end of the motor is in transmission connection with the left end of the speed reducer, and the right end of the speed reducer is in transmission connection with the left end of the roller; a clasping connection structure matched with the tensioning sleeve is arranged at the joint of the right end of the speed reducer and the left end of the roller;
the inner side surfaces of the two self-aligning roller bearings are respectively the outer side surfaces of the left end and the right end of the roller, and the outer side surfaces of the self-aligning roller bearings are sleeved on the bearing sleeve; the two bearing sleeves are arranged at the front end of the printing platform in a supporting way;
The upper end of one torque arm supports the bottom of the speed reducer, the upper end of the other torque arm supports the bottom of the bearing sleeve positioned at the left end of the roller, and the rear edges of the two torque arms are both arranged below the printing platform;
The torque arm support column is arranged between the bottoms of the two torque arms, the right end of the torque arm support column is connected with the bottom of the torque arm for supporting the bearing sleeve, the left end of the torque arm support column penetrates through the bottom of the other torque arm for supporting the speed reducer, the inner side surface of the tension ring is sleeved on the outer side surface of the left end of the torque arm support column, and the outer side surface of the tension ring is propped against the bottom of the other torque arm;
The conveyor belt bypasses the upper roll surface, the front roll surface and the lower roll surface of the roller from above and then enters the upper part of the air cooling device.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103895345B (en) * | 2014-03-27 | 2016-01-20 | 华中科技大学 | A kind of multifunction electric fluid ink-jet print system and method |
| CN207241167U (en) * | 2017-08-18 | 2018-04-17 | 诚德科技股份有限公司 | A kind of thinfilms device |
| CN210759848U (en) * | 2019-08-14 | 2020-06-16 | 上海汇屹数码科技有限公司 | UV roll-to-roll film cooling printing platform and inkjet printer |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107745579A (en) * | 2016-11-10 | 2018-03-02 | 北京航空航天大学 | A kind of volume to volume printed electronic ink-jet processing platform with air supporting support function |
| CN111890799A (en) * | 2020-08-10 | 2020-11-06 | 青岛河钢复合新材料科技有限公司 | Digital coil steel printing equipment and method thereof |
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