Six-color metal plate printing machine convenient for adjusting chromatic aberration
Technical Field
The invention relates to the technical field of metal printing, in particular to a six-color metal plate printing machine convenient for color difference adjustment.
Background
The metal printing is usually screen printing, which is a method of obtaining a pattern by scraping and printing a stencil and a printing material, and is called screen printing for short. The pattern precision of the silk-screen method is lower than that of the photochemical method, but the process is simple, the production efficiency is high, the cost is low, and the method is suitable for mass production. Because screen printing only can print a colour at every turn, the polychrome metal sheet printing mode among the prior art is through many machines series connection in order to print each colour respectively on the metal, and equipment cost is high, and produces the line often longer when printing the colour more, and is high to the requirement of factory building specification, and place adaptability is poor to, prior art carries out the mode ink feed of single-point inkjet to the screen printing board, is difficult to adjust inkjet concentration.
Therefore, it is necessary to provide a six-color sheet metal printing press which facilitates adjustment of color difference to solve the problems set forth in the background art described above.
Disclosure of Invention
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a six look metal sheet printing machines convenient to adjust colour difference, includes the base, base upper surface center is equipped with the conveyer belt, the both sides of base upper surface respectively are fixed with the slide rail, every be equipped with the slide in the slide rail slidable, but be equipped with servo pivoted carousel in the slide, two the centre of a circle of carousel is passed through the center pin and is fixed together, the circumference equipartition has a plurality of connecting plates that can follow its radial slip in the carousel, two rotationally be equipped with the printing roller between two connecting plates that correspond in the carousel, every the printing roller can be rotatory by the driving motor drive who fixes in the connecting plate respectively, two still be fixed with the inkjet pipe between two connecting plates that correspond in the carousel, the inkjet pipe is located the oblique below of printing roller with printing roller parallel and carousel rotation printing roller under, be equipped with rotatable screw rod on the slide rail, the screw rod can be rotatory through screw rod motor drive, screw rod and slide threaded connection.
Preferably, the plurality of nozzles are fixed in the ink jet pipe in a linear and uniform arrangement manner, and when the ink jet pipe is parallel to the printing roller and the turntable rotates to a position right below the printing roller, an extension line of the nozzle is tangent to a side line of the printing roller close to the lower part.
Furthermore, as preferred, two still be fixed with the accumulator between two corresponding link plates in the carousel, the accumulator is located the oblique top of printing roller with printing roller parallel and carousel rotation printing roller when under, one side that the accumulator is close to printing roller is fixed with the doctor-bar, doctor-bar and printing roller laminating, just doctor-bar width direction's extension line is tangent with printing roller near the sideline of top.
Further, as a preferable mode, a return pipe is arranged inside one side of the recovery tank, which is far away from the scraping blade, the return pipe is communicated with the bottom of the notch of the recovery tank, and the return pipe is connected to an external suction pump.
Preferably, the connecting plate is hinged with connecting rods, the other end of each connecting rod is hinged to a sliding plate, the sliding plate is slidably sleeved in the central shaft, an electromagnet is fixed in the central shaft, and a spring is arranged between the sliding plate and the electromagnet.
Furthermore, as an optimization, a plurality of vertical guide rails are fixed on two sides of the bottom of one end of the base, a plurality of vertically arranged screen plate boxes are slidably arranged between the vertical guide rails on two sides, each screen plate box is fixedly connected with each other, and a telescopic rod is connected between the bottommost screen plate box and the bottom of the base.
Further, as preferred, rotationally equipartition has arranged many backing rolls perpendicular with conveyer belt advancing direction below the silk screen board box, the backing roll top is close to conveyer belt department and rotationally is equipped with the drive roller that can servo pivoted.
Preferably, a wire mesh plate driving groove is formed in the range, corresponding to the slide rail, of the two sides of the conveying belt, an opening is formed in one surface, facing the conveying belt, of the wire mesh plate driving groove, a guide belt capable of moving in a servo mode is arranged on the lower portion in the opening, and a plurality of pressing rollers perpendicular to the advancing direction of the guide belt are uniformly distributed and arranged at a certain distance above the guide belt.
Further, preferably, the wire mesh plate driving groove is capable of changing a height by a lifting device provided in the base.
Further, as preferred, one end of the upper part of the conveyor belt, which is far away from the silk screen plate box, is provided with a curing box, and the curing box comprises UV curing equipment, heating equipment and ventilation equipment, compared with the prior art, the invention has the beneficial effects that:
according to the invention, ink is supplied in the ink spraying pipes of the ink communicating channels with different colors in sequence, the silk screen plates with corresponding colors are respectively placed in the silk screen plate boxes in sequence, and the silk screen plates with each color can be sequentially printed by rotating the rotary table and vertically moving the silk screen plate boxes, so that the production line of multi-color metal plate printing is short, the integration level of the device is high, and the cost is low.
According to the invention, the negative pressure is provided for the return pipe through the suction pump, so that the ink in the recovery tank can be sucked away and flows back to the ink box for recycling, and therefore, when the rotary table rotates to switch other printing rollers to the lowest part, the ink attached to the surface of the last ink-jet printing roller and the ink in the recovery tank can be recovered to the corresponding ink box, and the residual ink in the printing roller and the recovery tank is prevented from dripping.
In the invention, the spring naturally moves the sliding plate to the direction that the connecting rod pushes the connecting plate to move away from the circle center of the turntable, the printing roller can be attached to the silk screen plate at the moment, when the electromagnet is electrified, the sliding plate moves to the direction that the connecting rod pushes the connecting plate to move close to the circle center of the turntable, the printing roller is separated from the silk screen plate at the moment, and the ink jet tube and the recovery tank are not contacted with the silk screen plate in the rotation process of the turntable.
Drawings
FIG. 1 is a schematic view of a six-color sheet metal printing press for facilitating adjustment of color differences;
FIG. 2 is a schematic view of a printing roll configuration;
FIG. 3 is a schematic diagram of the wire mesh sheet drive slot configuration;
FIG. 4 is a schematic view of a connection plate;
in the figure: 1. a base; 2. a conveyor belt; 3. a slide rail; 4. a slide base; 41. a central shaft; 5. a turntable; 51. a connecting plate; 52. a connecting rod; 53. a spring; 54. an electromagnet; 55. a sliding plate; 6. a printing roller; 7. an ink jet tube; 71. a nozzle; 8. a recovery tank; 81. scraping a blade; 82. a return pipe; 9. a drive motor; 10. a screw; 11. a screw motor; 12. a wire mesh plate driving groove; 121. a guide belt; 122. a compression roller; 13. a curing box; 14. a vertical guide rail; 15. a wire mesh plate box; 16. a support roll; 17. a drive roller; 18. a telescopic rod; 19. a lifting device.
Detailed Description
Referring to fig. 1, in an embodiment of the present invention, a six-color metal plate printing machine convenient for color difference adjustment includes a base 1, a conveyor belt 2 is disposed at the center of the upper surface of the base 1, slide rails 3 are respectively fixed on both sides of the upper surface of the base 1, a slide carriage 4 is slidably disposed in each slide rail 3, a rotary table 5 capable of servo rotation is disposed in each slide carriage 4, the centers of circles of the two rotary tables 5 are fixed together through a central shaft 41, a plurality of connecting plates 51 capable of sliding along the radial direction are uniformly distributed in the periphery of the rotary table 5, a printing roller 6 is rotatably disposed between two corresponding connecting plates 51 in the two rotary tables 5, each printing roller 6 can be driven to rotate by a driving motor 9 fixed in each connecting plate 51, an inkjet tube 7 is further fixed between two corresponding connecting plates 51 in the two rotary tables 5, the inkjet tube 7 is parallel to the printing roller 6, and the inkjet tube 7 is located obliquely below the printing roller 6 when the rotary table 5 rotates to the printing roller 6, a screw 10 is disposed on the slide rail 3, the screw 10 can be driven to rotate by the screw motor 11, and the slide carriage 4 is connected to rotate along the slide rails 11.
Referring to fig. 2, in the embodiment, a plurality of nozzles 71 are fixed in the ink jet pipe 7 in a linear and uniform arrangement, and when the ink jet pipe 7 is parallel to the printing roller 6 and the rotary table 5 rotates to the right below the printing roller 6, an extension line of the nozzle 71 is tangent to a side line of the printing roller 6 close to the lower side. Supplying ink to the nozzles 71 through the ink supply tubes 7 enables the nozzles 71 to eject ink below the printing roller 6, so that the printing roller 6 can print ink onto the metal plate through the screen plate.
In this embodiment, two recovery grooves 8 are further fixed between two corresponding connecting plates 51 in the rotating disc 5, the recovery grooves 8 are parallel to the printing roller 6, and when the rotating disc 5 rotates to the printing roller 6 right below, the recovery grooves 8 are located obliquely above the printing roller 6, a doctor blade 81 is fixed on one side of the recovery grooves 8 close to the printing roller 6, the doctor blade 81 is attached to the printing roller 6, and an extension line of the doctor blade 81 in the width direction is tangent to a side line of the printing roller 6 close to the top. When the printing roller 6 rotates in the circumferential direction from the nozzle 71 to the blade 81, the ink adhering to the printing roller 6 from the nozzle 71 is scraped into the recovery tank 8 by the blade 81.
In this embodiment, the return pipe 82 is arranged inside one side of the recovery tank 8 far away from the scraping blade 81, the return pipe 82 is communicated with the bottom of the notch of the recovery tank 8, and the return pipe 82 is connected to an external suction pump, negative pressure is provided to the return pipe 82 through the suction pump to suck ink in the recovery tank 8 and return the ink to the ink box for recycling, so that when the rotary disc 5 rotates to switch other printing rollers 6 to the lowest part, ink adhered to the surface of the last inkjet printing roller 6 and ink in the recovery tank 8 can be recovered to the corresponding ink box, and residual ink in the printing roller 6 and the recovery tank 8 is prevented from dropping.
Referring to fig. 4, in this embodiment, the connecting plate 51 is hinged with connecting rods 52, the other end of each connecting rod 52 is hinged to a sliding plate 55, the sliding plate 55 is slidably sleeved in the central shaft 41, an electromagnet 54 is further fixed in the central shaft 41, a spring 53 is arranged between the sliding plate 55 and the electromagnet 54, the spring 53 enables the sliding plate 55 to move to the connecting rod 52 to push the connecting plate 51 to move in a direction away from the center of the rotary table 5 in a natural state, at this time, the printing roller 6 can be attached to the wire mesh plate, when the electromagnet 54 is energized, the sliding plate 55 moves to the connecting rod 52 to push the connecting plate 51 to move in a direction close to the center of the rotary table 5, at this time, the printing roller 6 is separated from the wire mesh plate, and the ink jet tube 7 and the recovery tank 8 are not in contact with the wire mesh plate in the rotation process of the rotary table 5.
Referring to fig. 1 and 3, in the embodiment, a plurality of vertical guide rails 14 are fixed on two sides of the bottom of one end of the base 1, a plurality of vertically arranged screen plate boxes 15 are slidably disposed between the vertical guide rails 14 on two sides, each screen plate box 15 is fixedly connected, an expansion link 18 is connected between the bottommost screen plate box 15 and the bottom of the base 1, and the expansion link 18 can drive the screen plate boxes 15 to move up and down in the vertical guide rails 14, and the movement distance enables each screen plate box 15 to be sequentially flush with the surface of the conveyor belt 2.
In this embodiment, rotationally the equipartition is arranged with many backing rolls 16 perpendicular with the direction of travel of conveyer belt 2 below silk screen plate box 15, backing roll 16 top is close to conveyer belt 2 department and rotationally is equipped with can servo pivoted drive roller 17, when the silk screen plate is placed between backing roll 16 and drive roller 17, can drive the silk screen plate and move on backing roll 16 through rotating drive roller 17, makes the silk screen plate can move on conveyer belt 2.
In this embodiment, a screen plate driving groove 12 is arranged in a range corresponding to the sliding rail 3 on both sides of the conveying belt 2, one surface of the screen plate driving groove 12 facing the conveying belt 2 is provided with an opening, a guide belt 121 capable of moving by servo is arranged at the lower part in the opening, a plurality of compression rollers 122 perpendicular to the advancing direction of the guide belt 121 are uniformly arranged at a certain distance above the guide belt 121, and when the screen plate is transferred from the screen plate box 15 to the conveying belt 2, both sides of the screen plate are clamped between the guide belt 121 and the compression rollers 122, so that the screen plate can be further driven to move by the movement of the guide belt 121 to move to a corresponding position above the metal plate to prepare for printing.
In this embodiment, the wire mesh plate driving grooves 12 can be changed in height by the elevating device 19 provided in the base 1, so that the wire mesh plate can be attached to or detached from the metal plate.
In this embodiment, one end of the upper side of the conveyor belt 2, which is far away from the screen plate box 15, is provided with a curing box 13, and the curing box 13 comprises a UV curing device, a heating device and a ventilation device therein.
In specific implementation, ink is supplied in the ink jet pipes 7 of the ink communicating channels with different colors in sequence, the silk screen plates with corresponding colors are placed in the silk screen plate boxes 15 respectively in sequence, the metal plates are conveyed to the range of the slide rail 3 through the conveyor belt 2, the telescopic rods 18 drive the silk screen plate boxes 15 to lift to enable one of the silk screen plates to be aligned with the height of the silk screen plate driving groove 12, the two sides of the silk screen plate are clamped between the guide belt 121 and the compression roller 122 through the driving roller 17, and the silk screen plate is further driven to move through the movement of the guide belt 121 to move to a corresponding position above the metal plate to be ready for printing;
the height of a silk screen plate driving groove 12 is changed through a lifting device 19, so that the silk screen plate is attached to a metal plate, after a rotary table 5 rotates to a position right below a printing roller 6 with a corresponding color under the power-on state of an electromagnet 54, the electromagnet 54 is powered off, the printing roller 6 is attached to the silk screen plate at the moment, a driving motor 9 drives the corresponding printing roller 6 to rotate in the circumferential direction from a nozzle 71 to a scraping blade 81, meanwhile, a screw motor 11 drives a screw rod 10 to rotate to drive a sliding seat 4 and the rotary table 5 to enable the printing roller 6 to reciprocate in the range above the silk screen plate, so that ink is fully printed on the metal plate through the silk screen plate, ink attached to the printing roller 6 from the nozzle 71 is scraped into a recovery groove 8 through the scraping blade 81, the nozzle 71 stops jetting ink after the silk screen plate is printed, the printing roller 6 continuously idles for a period of time under the power-on state of the electromagnet 54, and negative pressure is provided for a suction pump to a return pipe 82 to enable the ink in the recovery groove 8 to be pumped away;
the height of the wire mesh plate driving groove 12 is changed through the lifting device 19, so that the wire mesh plate is separated from the metal plate, the guide belt 121 moves to enable the wire mesh plate to move back to the corresponding wire mesh plate box 15, the metal plate reciprocates in the curing box 13 through the conveying belt 2 to enable the printing ink to be cured, the printing of the wire mesh plate with the color is completed, the wire mesh plates with all colors are sequentially printed in the same way, and the color metal plate printing can be completed.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention are equivalent to or changed within the technical scope of the present invention.