CN114571853A

CN114571853A - UV drying device of screen printing machine

Info

Publication number: CN114571853A
Application number: CN202210276615.1A
Authority: CN
Inventors: 王敏洁
Original assignee: Northeast Dianli University
Current assignee: Northeast Electric Power University
Priority date: 2022-03-21
Filing date: 2022-03-21
Publication date: 2022-06-03
Anticipated expiration: 2042-03-21
Also published as: CN114571853B

Abstract

The invention discloses a screen printing machine UV drying device, which comprises: a printer base; the printing device is arranged right above the printing machine base, the bottom of the printing device is provided with X-axis guide rails, and two groups of X-axis guide rails are fixedly arranged at two ends of the printing machine base in parallel; the UV dryer base is arranged on the right side face of the printer base, a first conveyor belt is arranged on the upper end face of the UV dryer base, and UV drying devices are arranged on two side frames in the middle of the first conveyor belt; and the bending conveying device is arranged between the printer base and the dryer base, one end of the bending conveying device is matched and connected with the two groups of X-axis guide rails, and the other end of the bending conveying device is in transmission connection with the first conveying belt.

Description

UV drying device of screen printing machine

Technical Field

The invention relates to the relevant field of screen printing, in particular to a screen printing machine UV drying device.

Background

The light-color light-changing technology refers to a technology that Magnetic Ink (OVMI) generates dynamic light-changing phenomenon after being subjected to silk-screen printing and Magnetic orientation processes. After the magnetic orientation process is completed, the optically variable material which is orderly arranged after magnetization needs to be cured, and generally, the curing modes mainly include wind curing and UV curing.

Because before the UV curing process, the magnetic ink can form a curing film in the air, the magnetic ink which is orderly arranged after magnetization has the possibility of flowing in the curing film, so that the problem of different concentrations of the magnetic ink on a printing material is caused, the picture definition of the surface layer of a printed product is different by carrying out UV curing at the moment, and meanwhile, the probability of generating defective products due to the stretching of the printed product caused by overhigh temperature in the UV curing process is greatly increased.

Disclosure of Invention

In order to achieve the purpose, the invention provides the following technical scheme: a screen printing machine UV drying device, it includes:

a printer base;

the printing device is arranged right above the printing machine base, the bottom of the printing device is provided with X-axis guide rails, and two groups of X-axis guide rails are fixedly arranged at two ends of the printing machine base in parallel;

the UV drying machine base is arranged on the right side face of the printing machine base, a conveyor belt is arranged on the upper end face of the UV drying machine base, and UV drying devices are arranged on two side frames in the middle of the conveyor belt;

and the bending conveying device is arranged between the printer base and the dryer base, one end of the bending conveying device is connected with the two groups of X-axis guide rails in a matched mode, and the other end of the bending conveying device is connected with the conveying belt in a transmission mode.

Further, as preferred, printing device includes the Z axle guide rail, the vertical installation of Z axle guide rail is in the left side up end of printing machine base to be located two sets of the intermediate position of X axle guide rail, just, be provided with on the Z axle guide rail and follow slip and perpendicular to from it the Y axle guide rail of X axle guide rail, the intermediate position fixed mounting of Y axle guide rail has the arm, the arm fixation clamp holds the scraper, the lower level of scraper is fixed and is provided with the screen printing plate, the both ends of screen printing plate are all fixed through solid fixed splint the top both ends of X axle guide rail, just, the intermediate position slidable of X axle guide rail has installed the printing plate, printing plate the place ahead fixed mounting has the location axle, the location axle with the printing plate cooperatees and links up.

Further, as preferred, the arm includes cylinder one, cylinder two, cylinder one with two fixed mounting of cylinder are in the top of arm shell, vertical slidable installs in the backup pad in the arm shell, just, arm shell outside stretch out the position pass through the slip table with Y axle track sliding connection, the lower extreme fixed mounting holder of backup pad, the fixed centre gripping scraper of holder, be provided with ink scraping knife and ink returning knife around the scraper respectively.

Preferably, the ink returning small hole is arranged at the cutting edge of the ink returning knife, and the cutting edge of the ink returning knife is inclined by 15 degrees relative to the knife handle and is longer than the cutting edge of the ink scraping knife.

Further, it is preferable that the curved conveyer includes a curved casing having a smooth surface and curved regulating means installed at left and right sides of the curved casing, and the curved casing is divided into an inflexible horizontal part and a bendable arc part, and the curved casing is embedded in the curved regulating means

Further, as preferred, the bending regulation and control device comprises a conveyor belt, the conveyor belt is of an arc closed-loop structure and is in meshed connection with a drive wheel gear, the drive wheel is respectively installed at two sides of the horizontal end and the vertical end of the arc-shaped conveyor belt, a plurality of groups of adjusting devices are installed along the conveyor belt, the middle position of each adjusting device clamps the bending shell, the bending shell is of a bendable elastic structure and is internally provided with chain plates, two adjacent chain plates are hinged to each other, two sides of the bendable part of the bending shell are provided with two-way motors, two output ends of each two-way motor are respectively and fixedly provided with a worm, the worm is sleeved with an adjustable sleeve, one end of each adjustable sleeve, close to the bending shell, is in meshed connection with the worm gear and is fixedly connected with the bending shell, the bending shell and the adjusting device are symmetrically provided with buffering air bags, a positioning support is further mounted in the middle of the right side of the adjusting device, and three groups of telescopic supports are mounted at the left end of the adjusting device.

Further, as preferred, the pressure strip is installed to one side of conveyer belt, the even distribution of pressure strip equidistance is in one side of conveyer belt, and adjacent the distance of pressure strip equals adjacently adjusting device's distance.

Compared with the prior art, the invention has the beneficial effects that:

according to the invention, the bending conveying device is added in front of the UV drying device, the bending conveying device can effectively enable the magnetic ink on the printed matter to be uniformly distributed on the surface of the printed matter in the conveying process, the defective rate of the printed matter is reduced in the UV curing process, and the bending conveying device is provided with the micro fan blades, so that the curing degree of the magnetized ink in the air is further enhanced, and the printed matter is cooled at the same time, so that the printed matter is in the most suitable UV curing temperature state, and the defective rate is further reduced.

Drawings

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

FIG. 2 is a schematic view of a printing apparatus according to the present invention;

FIG. 3 is a schematic view of the construction of the robot arm of the present invention;

FIG. 4 is an enlarged view of the structure of the first embodiment of the present invention:

FIG. 5 is a schematic view of the curved conveyor of the present invention;

FIG. 6 is a schematic structural diagram of the bending control device of the present invention.

In the figure: 1. printing machine base 2, printing device 21, screen printing plate 22, fixing clamp plate 23, printing plate 24, Y-axis track 25, scraper 251, scraping blade 252, ink returning blade 2521, ink returning small hole 26, X-axis track 27, Z-axis track 28, mechanical arm 29, positioning shaft 281, first air cylinder 282, second air cylinder 283, mechanical arm housing 284, support plate 285, clamping piece 3, bending conveying device 31, bending housing 311, chain plate 32, bending control device 321, adjusting device 3211, adjustable sleeve 3212, bidirectional motor 3213, telescopic bracket 3214, buffer air bag 3215, worm 322, conveying belt 323, driving wheel 324, micro-impeller 325, positioning bracket 4, UV dryer base 5, first conveying belt 6, UV drying device

Detailed Description

Referring to fig. 1 to 5, in an embodiment of the present invention, a screen printing machine UV drying apparatus includes: the screen printing machine UV drying device includes:

a printer base 1;

the printing device 2 is arranged right above the printer base 1, the bottom of the printing device is provided with X-axis guide rails 26, and two groups of the X-axis guide rails 26 are fixedly arranged at two ends of the printer base 1 in parallel;

the UV drying machine base 4 is arranged on the right side face of the printing machine base 1, a conveyor belt 5 is arranged on the upper end face of the UV drying machine base, and UV drying devices 6 are arranged on two side frames in the middle of the conveyor belt 5;

and the bent conveying device 3 is arranged between the printer base 1 and the dryer base 4, one end of the bent conveying device is matched and connected with the two groups of X-axis guide rails 26, and the other end of the bent conveying device is in transmission connection with the first conveying belt 5.

After the printed matter is printed by the printing device 2, the printed matter is conveyed to the bending conveyor 3 by the X-axis guide rail 26, is bent, extruded and conveyed to the first conveyor belt 5 of the UV drying device 6, is conveyed to the UV drying device 6 by the first conveyor belt 5, and is subjected to UV drying operation.

In this embodiment, the printing device 2 includes a Z-axis guide rail, the Z-axis guide rail is vertically installed on the left upper end surface of the printer base 1, and is located two sets of intermediate positions of the X-axis guide rail, and, a Y-axis guide rail 24 which can slide up and down and is perpendicular to the X-axis guide rail is provided on the Z-axis guide rail 27, a mechanical arm 28 is fixedly installed at the intermediate position of the Y-axis guide rail 24, a scraper 25 is fixedly clamped by the mechanical arm 28, a screen printing plate 21 is fixedly provided on the lower side of the scraper 25, both ends of the screen printing plate 21 are fixed at both ends above the X-axis guide rail 26 through a fixing clamp plate 22, and a printing support plate 23 is installed at the intermediate position of the X-axis guide rail 26 in a slidable manner, a positioning shaft 29 is fixedly installed in front of the printing support plate 23, and the positioning shaft 29 is engaged with the printing support plate 23.

When the printing device 2 performs printing, the printing plate 23 moves along the X-axis guide rail 26 and is embedded with the positioning shaft 29, then the mechanical arm descends along the Y-axis rail to the scraper 25 to contact and press the screen printing plate 21, at this time, the mechanical arm 28 releases magnetic ink to the screen printing plate 21 and moves along the Y-axis rail simultaneously to enable the scraper 25 to scrape the ink from the printing plate 23 to perform printing, and after printing is completed, the magnetic ink on a printed matter is magnetized.

In a preferred embodiment, the mechanical arm 28 includes a first air cylinder 281 and a second air cylinder 282, the first air cylinder 281 and the second air cylinder 282 are fixedly installed above a mechanical arm housing 283, the mechanical arm housing 283 is vertically and slidably installed in a support plate 284, an external extending portion of the mechanical arm housing 283 is slidably connected with the Y-axis rail 24 through a sliding table, a clamping member 285 is fixedly installed at a lower end of the support plate 284, the clamping member fixedly clamps the scraper 25, and the scraper 251 and the ink return blade 252 are respectively arranged at the front and the rear of the scraper 25.

When the mechanical arm 28 performs a printing operation, the cylinder 281 is first actuated to move the doctor blade 251 downward to press the screen printing plate 21, and the cylinder two generates a downward pressure to release the ink inside from the ink return small hole 2521, and when the mechanical arm 28 performs an ink return operation, the doctor blade 251 is raised, the ink return blade 252 is lowered and pressed, at this time, a suction force is generated near the ink return small hole 2521 to recover the ink and scrape the excess ink on the printing plate 23, thereby preventing the ink from being volatilized and deteriorated in the air for a long time.

In this embodiment, the ink returning small hole 2521 is installed at the cutting edge of the ink returning blade 252, the cutting edge of the ink returning blade 252 is inclined 15 ° relative to the handle and is longer than the cutting edge of the doctor blade 251, the cutting edge of the ink returning blade 252 is inclined 15 ° and is longer than the doctor blade 251, ink returning can be performed quickly and cleanly during the ink returning action, ink is prevented from moving to the edge of the screen printing plate 21 due to the penetration effect, and the screen is in an arc-shaped structure due to the pressing, so that the ink is further prevented from moving to the edge of the screen printing plate 21, and the subsequent cleaning is facilitated.

In this embodiment, the curved conveying device 3 includes a curved casing 31 and a curved regulating device 32, the surface of the curved casing 31 is a smooth structure, the curved regulating device 32 is installed on the left and right sides of the curved casing 31, the curved casing 31 is divided into an inflexible horizontal portion and a bendable arc portion, the curved casing 31 is embedded in the curved regulating device 32, and the curved regulating device 32 can regulate the bending amplitude of the curved casing 31 during conveying, so that printed matters with different materials can be continuously adapted on the surface of the curved casing 31 to prevent irreversible damage to the printed matters.

In a preferred embodiment, the bending control device 32 includes a conveyor belt 322, the conveyor belt is in an arc closed loop structure and is in gear engagement with a driving wheel 323, the driving wheel 323 is respectively installed at two sides of a horizontal end and a vertical end of the arc conveyor belt 322, a plurality of sets of adjusting devices 321 are installed along the conveyor belt 322, the middle position of the adjusting devices 321 clamps the bending shell 31, the bending shell 31 has a flexible elastic structure, a chain plate 311 is installed inside the bending shell 31, adjacent chain plates 311 are hinged, a bidirectional motor 3212 is installed at two sides of the flexible portion of the bending shell 31, two output ends of the bidirectional motor 3212 are respectively and fixedly installed with a worm 3215, an adjustable sleeve 3211 is sleeved on the worm 3215, one end of the adjustable sleeve 3211, which is close to the bending shell 31, is in gear engagement with the worm 3215, and is fixedly connected with the curved shell 31, the connection part of the curved shell 31 and the adjusting device 321 is symmetrically provided with buffer air bags 3214, in addition, the middle position of the right side of the adjusting device 321 is also provided with a positioning bracket 325, and the left end of the positioning bracket is provided with three groups of telescopic brackets 3213.

The two ends of the bidirectional motor 3212 are oppositely rotated, and when the bending amplitude a of the bent housing 31 is increased, then the left output end of the bidirectional motor 3212 is controlled to rotate forward and the right output end rotates backward, so that the adjustable sleeve 3211 at the left end moves leftward to stretch and extrude the buffer air bag 3214 at the left end, at this time, the three groups of telescopic brackets 3213 contract in a self-adaptive manner, and fixes the relative position of the adjusting device 321, so that the adjustable sleeve 3211 at the right end moves synchronously to the left, and stretches the buffer airbag 3214 positioned at the right side, at which time the chaining plate 311 is adaptively horizontally moved leftward due to the bending compression action, reducing the number of bendable parts of the unit chaining plate 311 in the bent housing 31, at which time the bending amplitude a is increased, and, when the bending amplitude a of the bent housing 31 is reduced, only the rotation direction of the bidirectional output end of the bidirectional motor 3212 needs to be controlled, which is opposite to the above steps.

When the printed matter is bent and pressed, the micro impeller 324 is firstly started to perform primary wind curing on the ink on the printed matter, so that a cured film along the lines of the pattern is formed on the surface of the ink, and the temperature of the magnetization sorting process is increased, when the printed matter completely covers the surface of the bent shell 31, because the bending amplitude alpha of the bent shell 31 is equal at each position of the upper surface of the bent shell 31, namely, the printed matter is subjected to the internal stress with the same size on the surface of the bent shell, at this time, the ink which is not solidified yet between the cured film and the surface of the printed matter is uniformly distributed under the action of the internal stress, and the larger the bending amplitude alpha is, the larger the internal stress is applied to the surface of the bent shell 31, and by adjusting the size of the bending amplitude alpha, the curing film is prevented from cracking or deforming due to overlarge internal stress while the ink is uniformly distributed, so that the defect of the product is reduced.

In this embodiment, a pressing plate 3241 is installed on one side of the conveyor belt 324, the pressing plate 3241 is equidistantly and uniformly distributed on one side of the conveyor belt 324, and the distance between adjacent pressing plates 3241 is equal to the distance between adjacent adjusting devices 323, when the printed product is conveyed to the bending conveying device 3, the printed product is received by the pressing plate 3241 and is pressed and conveyed, and the bending conveying action can be continuously, rapidly and stably performed under the cyclic reciprocating motion of the conveyor belt 324.

In specific implementation, after the printed matter is printed by the printing device 2, and after a magnetization sorting process is performed, the printed matter is conveyed to the bending conveying device 3 by the X-axis guide rail 26 to be bent and extruded, and simultaneously, heat generated by the magnetization sorting process is dissipated, and ink on the printed matter is primarily cured, and is conveyed to the first conveying belt 5 of the UV drying device 6, and is conveyed to the UV drying device 6 by the first conveying belt 5, the UV drying device 6 performs ultraviolet irradiation drying on the magnetized ink, because the UV drying is performed in 0.1-0.2 s, that is, each color ink on the surface layer of the printed matter is instantly dried, the ink cannot be fused with each other, and the concentration of the ink at each position of the surface layer of the printed matter is equal, so that the pictures on the surface layer of the printed matter are clearly superimposed, and exquisite patterns with uniform color depth are obtained, and simultaneously, the dried printed matter is cooled and output.

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.

Claims

1. The utility model provides a screen printing machine UV drying device which characterized in that: the screen printing machine UV drying device includes:

a printer base (1);

the printing device (2) is arranged right above the printing machine base (1), an X-axis guide rail (26) is arranged at the bottom of the printing device, and two groups of X-axis guide rails (26) are fixedly arranged at two ends of the printing machine base (1) in parallel;

the UV drying machine base (4) is arranged on the right side face of the printing machine base (1), a first conveying belt (5) is installed on the upper end face of the UV drying machine base, and UV drying devices (6) are arranged on two side frames in the middle of the first conveying belt (5);

the bending conveying device (3) is installed between the printing machine base (1) and the drying machine base (4), one end of the bending conveying device is connected with the two groups of X-axis guide rails (26) in a matched mode, and the other end of the bending conveying device is connected with the first conveying belt (5) in a transmission mode.

2. The UV drying device for the screen printing machine according to claim 1, wherein: the printing device (2) comprises a Z-axis guide rail, the Z-axis guide rail is vertically installed on the upper end face of the left side of the printing machine base (1) and is located at the middle positions of two groups of X-axis guide rails, a Y-axis guide rail (24) which can slide up and down and is perpendicular to the X-axis guide rails is arranged on the Z-axis guide rail (27), a mechanical arm (28) is fixedly installed at the middle position of the Y-axis guide rail (24), a scraper (25) is fixedly clamped on the mechanical arm (28), a screen printing plate (21) is fixedly arranged on the lower side of the scraper (25), two ends of the screen printing plate (21) are fixed at two ends above the X-axis guide rail (26) through fixing clamping plates (22), a printing plate (23) is slidably installed at the middle position of the X-axis guide rail (26), and a positioning shaft (29) is fixedly installed in front of the printing plate (23), the positioning shaft (29) is matched and connected with the printing plate (23).

3. The UV drying device for the screen printing machine according to claim 2, wherein: arm (28) include cylinder one (281), cylinder two (282), cylinder one (281) with cylinder two (282) fixed mounting is in the top of arm shell (283), vertical slidable installs in arm shell (283) backup pad (284), just, arm shell (283) outside stretch out the position pass through the slip table with Y axle track (24) sliding connection, lower extreme fixed mounting holder (285) of backup pad (284), holder fixed centre gripping scraper (25), scraper (25) are provided with doctor blade (251) and ink return blade (252) around respectively.

4. The UV drying device for the screen printing machine according to claim 3, wherein: an ink returning small hole (2521) is arranged at the cutting edge of the ink returning knife (252), and the cutting edge of the ink returning knife and the knife handle are relatively inclined by (15) °andlonger than the cutting edge of the doctor blade (251).

5. The UV drying device for the screen printing machine according to claim 1, wherein: the curved conveying device (3) comprises a curved shell (31) and a curved regulating device (32), the surface of the curved shell (31) is of a smooth structure, the curved regulating device (32) is arranged on the left side and the right side of the curved shell (31), the curved shell (31) is divided into a horizontal part which is not bendable and an arc part which is bendable, and the curved shell (31) is embedded in the curved regulating device (32).

6. The UV drying device of the screen printing machine according to claim 5, wherein: the bending regulation and control device (32) comprises a conveyor belt (322), the conveyor belt (322) is of an arc closed-loop structure and is in gear engagement connection with a driving wheel (323), the driving wheel (323) is respectively installed at two sides of the horizontal end and the vertical end of the arc conveyor belt (322), a plurality of groups of adjusting devices (321) are installed along the conveyor belt (322), the middle position of each adjusting device (321) clamps the bending shell (31), the bending shell (31) is provided with a bendable elastic structure, a chain plate (311) is installed in the bending shell, every two adjacent chain plates (311) are hinged, two sides of the bendable part of the bending shell (31) are provided with a two-way motor (3212), two output ends of each two-way motor (3212) are respectively and fixedly provided with a worm (3215), and an adjustable sleeve (3211) is sleeved on each worm (3215), one end of the adjustable sleeve (3211) close to the curved shell (31) is in gear engagement with the worm (3215) and is fixedly connected with the curved shell (31), buffer air bags (3214) are symmetrically arranged at the joint of the curved shell (31) and the adjusting device (321), and a positioning bracket (325) is further mounted in the middle of the right side of the adjusting device (321).

7. The UV drying device for the screen printing machine according to claim 6, wherein: compacting plate (3241) is installed to one side of conveyer belt (322), compacting plate (3241) equidistance even distribution is in one side of conveyer belt (322), and adjacent compacting plate (3241)'s distance equals adjacently adjusting device (321)'s distance.