CN111660658B - Multifunctional low-printing-pressure precise screen printing device and working method - Google Patents
Multifunctional low-printing-pressure precise screen printing device and working method Download PDFInfo
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- CN111660658B CN111660658B CN202010652366.2A CN202010652366A CN111660658B CN 111660658 B CN111660658 B CN 111660658B CN 202010652366 A CN202010652366 A CN 202010652366A CN 111660658 B CN111660658 B CN 111660658B
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- 238000007650 screen-printing Methods 0.000 title claims abstract description 169
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000007599 discharging Methods 0.000 claims abstract description 44
- 230000003287 optical effect Effects 0.000 claims abstract description 27
- 230000000007 visual effect Effects 0.000 claims abstract description 18
- 238000007639 printing Methods 0.000 claims abstract description 12
- 239000000758 substrate Substances 0.000 claims description 16
- 239000004579 marble Substances 0.000 claims description 13
- 230000001681 protective effect Effects 0.000 claims description 7
- 238000002360 preparation method Methods 0.000 claims description 6
- 238000003908 quality control method Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 230000001276 controlling effect Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000009966 trimming Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 235000012431 wafers Nutrition 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F15/00—Screen printers
- B41F15/08—Machines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F15/00—Screen printers
- B41F15/14—Details
- B41F15/16—Printing tables
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F15/00—Screen printers
- B41F15/14—Details
- B41F15/44—Squeegees or doctors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
- B41P2215/00—Screen printing machines
- B41P2215/10—Screen printing machines characterised by their constructional features
- B41P2215/11—Registering devices
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Screen Printers (AREA)
Abstract
The invention discloses a multifunctional low-printing-pressure precise screen printing device and a working method. The feeding and discharging station and the screen printing platform are arranged below the screen printing loading plane, the high-precision screen printing pressure mechanism is arranged above the screen printing loading plane, the optical visual positioning mechanism is arranged at the edge of the screen printing loading plane and is positioned above the feeding and discharging station, the feeding and discharging sliding table is arranged below the screen printing loading plane and is connected with the screen printing platform, and the screen printing platform is controlled to move on the feeding and discharging station. The invention realizes high-precision, high-stability, low-linewidth, ultra-thin and uniform printing, and ensures high-quality and high-efficiency product silk screen printing.
Description
Technical Field
The invention relates to the technical field of screen printing, in particular to a multifunctional low-printing-pressure precise screen printing device and a working method.
Background
Screen printing originated in china, which has been two thousand years old, and in terms of screen printing equipment, the earliest development should be germany and italy, and the development of screen printers in China is relatively late compared with developed countries. The screen printing equipment on the market mainly adopts plane printing, has lower domestic technical level and precision, and is especially used for the production of high-precision low-pressure screen printing machines. Aiming at the low printing pressure precision screen noble metal printing application equipment of silicon wafers, glass, plastics and ceramic substrates with extremely high requirements on screen printing quality (screen printing width, thickness, uniformity and the like), imported equipment is often selected for purchase; at present, the problems of domestic screen printing are mainly embodied in the following aspects: poor quality and precision; lack of speed and digitization; the stability gap is obvious; the pressure matching precision of the silk screen printing scraper is poor.
Therefore, how to improve the quality of screen printing, to realize precise, digitalized, high-stability and high-efficiency low-printing-pressure precise screen printing uniformly, and to improve the quality of screen printing products is a problem to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, the invention provides a multifunctional low-printing-pressure precise screen printing device and a working method thereof, wherein the multifunctional low-printing-pressure precise screen printing device comprises a machine body, an upper and a lower material stations, a screen printing platform, an optical visual positioning mechanism, a screen printing loading plane, a high-precision screen printing pressure mechanism and an upper and a lower material sliding tables, wherein the upper and lower material stations are arranged on the machine body. The feeding and discharging station and the screen printing platform are arranged below the screen printing loading plane, the high-precision screen printing pressure mechanism is arranged above the screen printing loading plane, the optical visual positioning mechanism is arranged at the edge of the screen printing loading plane and is positioned above the feeding and discharging station, the feeding and discharging sliding table is arranged below the screen printing loading plane and is connected with the screen printing platform, and the screen printing platform is controlled to move at the feeding and discharging station. The invention realizes high-precision, high-stability, low-linewidth, ultra-thin and uniform printing, and ensures high-quality and high-efficiency product silk screen printing.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a multi-functional low printing pressure precision screen printing device comprising: the machine body, a loading and unloading station, a screen printing platform, an optical visual positioning mechanism, a screen loading plane, a high-precision screen printing pressure mechanism and a loading and unloading sliding table which are positioned on the machine body; the feeding and discharging station and the screen printing platform are positioned below the screen loading plane; the high-precision silk screen printing pressure mechanism is arranged above the screen loading plane and is in sliding connection with the screen loading plane; the optical visual positioning mechanism is arranged at the edge of the screen loading plane and is positioned above the loading and unloading station; the feeding and discharging sliding table is arranged below the screen loading plane and connected with the screen printing platform, and the screen printing platform is controlled to move on the feeding and discharging stations. And placing a workpiece to be silk-screened on the silk-screen platform.
Preferably, the screen loading plane comprises a screen fixing plate and a plurality of marble supporting columns, wherein the marble supporting columns are fixedly arranged at the corner positions of the bottom surface of the screen fixing plate and support the screen fixing plate to be horizontally balanced; the screen plate is fixed on the bottom surface of the screen plate fixing plate; the marble plate fixing device is characterized in that a screen plate mounting clamping groove is formed in the inner side of each marble pillar on two sides of the lower surface of each screen plate fixing plate, a plurality of locking fixing screws penetrate through the screen plate fixing plate above the screen plate mounting clamping groove, the screen plate is inserted into the screen plate mounting clamping groove, the cross section of the screen plate is L-shaped, and the locking fixing screws are enabled to contact and tightly push the screen plate through rotation of the locking fixing screws, so that the screen plate is fixed.
Preferably, the high-precision silk-screen printing pressure mechanism comprises a balance weight fine adjustment mechanism, an ink return knife connecting mechanism, a scraper counter weight hammer mechanism, a return mechanism, a scraper seat assembly, a scraper and an ink return knife; the counterweight balance fine adjustment mechanism, the ink return knife connecting mechanism, the scraper counterweight hammer mechanism and the return mechanism are arranged on the scraper seat assembly; the scraper is arranged on one side of the scraper counter weight mechanism close to the screen plate fixing plate; the ink returning knife is arranged on one side, close to the screen plate fixing plate, of the ink returning knife connecting mechanism.
Preferably, the feeding and discharging station is provided with two groups of sliding rails, the feeding and discharging sliding tables are installed on the sliding rails, the screen printing platform is installed on the feeding and discharging sliding tables, and the feeding and discharging sliding tables drive the screen printing platform to slide in the feeding and discharging station.
Preferably, the return mechanism comprises a cylinder, an ejector rod and a balance rod; the cylinder is connected with the ejector rod and arranged at one end of the balance rod; the balance rod is rotationally connected to a support and a rotating seat fixedly arranged on the scraper seat assembly through a rotating shaft; the air cylinder pushes the ejector rod to enable the balance rod to do lever motion, and the free end of the balance rod moves up and down.
Preferably, the scraper counter weight mechanism is arranged in front of the support and the rotating seat, and the ink return knife connecting mechanism is arranged between the support and the rotating seat and the return mechanism; the balance weight fine adjustment mechanism is installed at the end of the balance rod, which is provided with the return mechanism, and comprises a screw rod and a fine adjustment balancing weight which is in matched rotation connection with the screw rod, wherein the screw rod is inserted at the end of the balance rod, and the fine adjustment balancing weight is penetrated on the screw rod. And the position of the fine tuning weight block on the screw is used for adjusting the up-down movement distance generated by the same acting force of the air cylinder when the balance rod is used for lever movement.
Preferably, the scraper counterweight hammer mechanism comprises a scraper counterweight block and a scraper connecting piece, and the ink return cutter connecting mechanism comprises a lifting cylinder and an ink return cutter connecting piece; the upper parts of the scraper connecting piece and the ink return knife connecting piece are respectively fixedly provided with the scraper balancing weight and the lifting cylinder, the lower parts of the scraper connecting piece and the ink return knife connecting piece are respectively fixedly provided with the scraper and the ink return knife, the other ends of the scraper and the ink return knife are contacted with the screen, and the contact pressure between the scraper and the screen and the contact pressure between the ink return knife are controlled through the quality control of the scraper balancing weight and the lifting distance of the lifting cylinder; the middle part of the scraper connecting piece is of a hollow structure, a pulley is fixedly arranged on the upper part of the hollow structure, and the pulley contacts with the upper surface of the free end of the balance rod.
Preferably, the screen printing device further comprises a protective cover, wherein the protective cover is in buckled sealing with the machine body, and the feeding and discharging stations, the screen printing platform, the optical visual positioning mechanism, the screen loading plane, the high-precision screen printing pressure mechanism and the feeding and discharging sliding table are buckled and sealed.
Preferably, the optical visual positioning mechanism comprises a rectangular bracket and two groups of optical coordinate positioning instruments; the right angle bracket is fixedly arranged on the side edge of the screen loading plane, two groups of optical coordinate positioners are respectively arranged on the two right angle edges of the right angle bracket, and the optical coordinate positioners are vertically aligned with the loading and unloading stations. And measuring the screen coordinates and the distance by the optical coordinate positioning instrument, so as to calibrate and adjust the position of the high-precision screen printing pressure mechanism and the screen printing pressure.
Preferably, sliding rails are fixed on two sides of the upper surface of the screen printing plate, and the high-precision screen printing pressure mechanism is in sliding connection with the screen printing plate fixing plate through the sliding rails to realize the same-direction sliding with the feeding and discharging sliding tables.
A screen printing device working method comprises the following specific steps:
step 1: loading the screen printing plate into a clamping groove corresponding to the screen printing machine and locking and fixing the screen printing plate;
step 2: after the screen printing device is ventilated and electrified, starting the screen printing device, and returning the high-precision screen printing pressure mechanism to the original point;
step 3: loading the positioning substrate onto a silk-screen printing platform, and adding silk-screen printing ink; the positioning substrate is a recycled PET transparent film;
step 4: through the positioning substrate, automatic/manual vision alignment positioning of the screen printing device is performed, and the drawing position of the screen is aligned;
step 5: loading a workpiece to be screen printed which is required to be screen printed on the screen printing platform, automatically and visually aligning and positioning by an optical visual positioning mechanism of the screen printing device, rapidly moving the screen printing platform to a screen printing station, and starting screen printing;
step 6: the ink returning knife moves to the lower station and moves back and forth to spread the silk-screen printing ink and returns to the preparation station;
step 7: the scraper moves to the lower station, and the scraper contacts with the silk screen to move back and forth under the action of the scraper counter weight hammer mechanism so as to print the silk screen printing ink on the surface of the substrate through the screen printing plate;
step 8: the scraper returns to the preparation station after completing the moving action, and the silk-screen platform rapidly moves from the silk-screen station to the loading and unloading station;
step 9: and (3) taking out the substrate subjected to silk screen printing on the silk screen printing platform automatically or manually, placing good products in a good product area, placing NG products in an NG product area, and repeating the steps (5) to (9). The automatic taking out of the substrate can be realized by utilizing a manipulator to automatically control taking and placing.
Compared with the prior art, the invention discloses a multifunctional low-printing-pressure precise screen printing device and a working method, wherein a low-pressure precise balance weight mechanism is used for balancing and controlling screen printing pressure of a screen printing scraper, a scraper counter weight mechanism is used for controlling the quality of a balancing weight to realize the control of the screen printing pressure of the scraper, and an ink return knife connecting mechanism is used for controlling the distance of a lifting cylinder to realize the pressure control of ink return knife spreading. Meanwhile, the optical visual positioning mechanism is also adopted to realize the positioning calibration of the screen printing platform, so that the accuracy of the screen printing position is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the front side view structure of a multifunctional low printing pressure precision screen printing device provided by the invention;
FIG. 2 is a side view of a multi-functional low printing pressure precision screen printing apparatus according to the invention;
FIG. 3 is a schematic view of the structure of the optical visual positioning mechanism provided by the invention;
FIG. 4 is a schematic side view of the high-precision screen printing pressure mechanism provided by the invention;
FIG. 5 is a schematic diagram of a screen loading plane side view structure provided by the invention;
FIG. 6 is a schematic diagram of a structure of the feeding and discharging sliding table provided by the invention;
FIG. 7 is a schematic diagram of a high-precision silk-screen printing pressure mechanism provided by the invention;
FIG. 8 is a schematic diagram of a return mechanism according to the present invention;
FIG. 9 is a schematic diagram of a scraper weight mechanism according to the present invention;
FIG. 10 is a schematic diagram showing the front view of the scraper weight mechanism according to the present invention;
FIG. 11 is a schematic diagram of a front view of a doctor blade according to the present invention;
FIG. 12 is a schematic view of the structure of the material loading and unloading level provided by the invention;
FIG. 13 is a schematic view of a screen loading structure according to the present invention;
fig. 14 is a schematic view of a protective cover structure provided by the invention.
In the accompanying drawings: the device comprises a machine body, a 2-loading and unloading station, a 21-sliding rail, a 3-screen printing platform, a 4-optical visual positioning mechanism, a 41-rectangular bracket, a 42-optical coordinate positioning instrument, a 5-screen loading plane, a 51-screen fixing plate, a 52-marble pillar, a 53-screen mounting clamping groove, a 54-locking fixing screw, a 55-screen, a 6-high-precision screen printing pressure mechanism, a 61-counterweight balance fine adjustment mechanism, a 611-screw, a 612-fine adjustment balancing weight, a 621-lifting cylinder, a 622-ink return knife connecting piece, a 63-scraper counterweight hammer mechanism, a 631-scraper balancing weight, a 632-scraper connecting piece, a 633-pulley, a 634-horizontal adjusting screw, a 635-rotating connecting shaft, a 64-return mechanism, a 641-cylinder, a 642-ejector rod, a 643-balancing rod, a 65-scraper seat assembly, a 651-rotating shaft, a 652-supporting and rotating seat mechanism, a 66-scraper, a 67-ink return sliding table, 7-loading and unloading materials and an 8-protecting cover.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment of the invention discloses a multifunctional low-printing-pressure precise screen printing device, which comprises: the machine body 1, a loading and unloading station 2, a screen printing platform 3, an optical visual positioning mechanism 4, a screen loading plane 5, a high-precision screen printing pressure mechanism 6 and a loading and unloading sliding table 7 which are positioned on the machine body 1; the feeding and discharging station 2 and the screen printing platform 3 are positioned below the screen loading plane 5; the high-precision screen printing pressure mechanism 6 is arranged above the screen loading plane 5 and is in sliding connection with the screen loading plane 5; the optical visual positioning mechanism 4 is arranged at the edge of the screen loading plane 5 and is positioned above the loading and unloading station 2; the feeding and discharging sliding table 7 is arranged below the screen loading plane 5 and connected with the screen printing platform 3, and controls the screen printing platform 3 to move on the feeding and discharging station 2. And placing a workpiece to be silk-screened on the silk-screen printing platform 3.
In order to further optimize the technical scheme, the screen loading plane 5 comprises a screen fixing plate 51 and a plurality of marble supporting columns 52, wherein the marble supporting columns 52 are fixedly arranged at the corner positions of the bottom surface of the screen fixing plate 51, and support the screen fixing plate 51 to be horizontally balanced; the screen 55 is fixed on the bottom surface of the screen fixing plate 51; the inner sides of marble supporting columns 52 on the two sides of the lower surface edge of the screen plate fixing plate 51 are provided with screen plate mounting clamping grooves 53, and a plurality of through locking fixing screws 54 are arranged on the screen plate fixing plate 51 above the screen plate mounting clamping grooves 53. The screen loading plane 5 ensures very flatness and stability, and ensures that the screen is parallel to the printed workpiece, thereby ensuring precision; the screen 55 is inserted into the screen mounting groove 53 having an L-shaped cross section, and the locking screw 54 is rotated to contact and press the screen 55, thereby fixing the screen 55.
In order to further optimize the technical scheme, the high-precision silk-screen printing pressure mechanism 6 comprises a balance weight fine adjustment mechanism 61, an ink return cutter connecting mechanism, a scraper weight balancing hammer mechanism 63, a return mechanism 64, a scraper seat assembly 65, a scraper 66 and an ink return cutter 67; the counterweight balance fine adjustment mechanism 61, the ink return knife connecting mechanism, the scraper counterweight hammer mechanism 63 and the return mechanism 64 are arranged on the scraper seat assembly 65; the scraper 66 is arranged on one side of the scraper counterweight hammer mechanism 63 close to the screen plate fixing plate 51; the ink return knife 67 is arranged on one side of the ink return knife connecting mechanism close to the screen plate fixing plate 51; the ink return blade attachment mechanism and the scraper counter weight mechanism 63 are located at the front edge of the scraper blade assembly 65, and the scraper 66 is located in front of the ink return blade 67. The return mechanism 64 can achieve the return effect through vertical jacking, and the balance weight balance fine adjustment mechanism 61 achieves the force application balance of the scraper 66 and the ink return knife 67 through left and right fine adjustment.
In order to further optimize the technical scheme, the feeding and discharging station 2 is provided with two groups of sliding rails 21, the feeding and discharging sliding tables are arranged on the sliding rails 21, the screen printing platform 3 is arranged on the feeding and discharging sliding tables 7, and the feeding and discharging sliding tables 7 drive the screen printing platform 3 to slide in a left-right straight line in the feeding and discharging station 2.
To further optimize the above technical solution, the return mechanism 64 includes a cylinder 641, a push rod 642 and a balance rod 643; cylinder 641 is connected with push rod 642 and is arranged at one end of balance rod 643; the balance lever 643 is rotatably connected to a support and rotation seat 652 fixedly mounted to the wiper seat assembly 65 via a rotation shaft 651; the cylinder 641 makes the balance bar 643 make lever movement by pushing the push rod 642, and the free end of the balance bar 643 moves up and down.
To further optimize the solution described above, the doctor counter weight mechanism 63 is mounted in front of the support and swivel 652, and the ink return blade connection mechanism is mounted between the support and swivel 652 and the return mechanism 64; the balance fine adjustment mechanism 61 is installed at the end of the balance bar 643 where the return mechanism 64 is installed, the balance fine adjustment mechanism 61 comprises a screw 611 and a fine adjustment balancing weight 612 which is in rotary connection with the screw 611 in a matched mode, the screw 611 is inserted into the end of the balance bar 643, and the fine adjustment balancing weight 612 is arranged on the screw 611 in a penetrating mode. The distance of up and down movement of the balance bar 643 is adjusted by fine tuning the position of the weight 612 on the screw 611.
To further optimize the solution described above, the doctor counter weight mechanism 63 includes a doctor counter weight 631 and a doctor connection 632, and the ink return blade connection mechanism includes a lift cylinder 621 and an ink return blade connection 622; the upper parts of the scraper connecting piece 632 and the ink returning knife connecting piece 622 are respectively fixedly provided with a scraper balancing weight 631 and a lifting cylinder 621, the lower parts are respectively fixedly provided with a scraper 66 and an ink returning knife 67, the other ends of the scraper 66 and the ink returning knife 67 are connected with the screen 55, and the contact pressure between the scraper 66 and the ink returning knife 67 and the screen 55 is controlled through the quality control of the scraper balancing weight 631 and the lifting distance of the lifting cylinder 621; the scraper connecting member 632 has a hollow structure in the middle, and a pulley 633 is fixedly installed at the upper part of the hollow structure, and the pulley 633 contacts the upper surface of the free end of the balance bar 643. The control of the precise screen printing force of the scraper 66 and the precise ink returning force of the ink returning knife 67 is achieved by configuring scraper balancing weights 631 with different weights and adjusting the lifting air cylinders 621, the screen is not easy to damage, and the service lives of the screen 55, the scraper 66 and the ink returning knife 67 are prolonged.
In order to further optimize the technical scheme, the screen printing device further comprises a protective cover 9, wherein the protective cover 9 is buckled with the machine body 1 to seal the feeding and discharging station 2, the screen printing platform 3, the optical visual positioning mechanism 4, the screen loading plane 5, the high-precision screen printing pressure mechanism 6 and the feeding and discharging sliding table 7.
In order to further optimize the technical scheme, the optical visual positioning mechanism 4 comprises a rectangular bracket 41 and two groups of optical coordinate positioners 42; the rectangular bracket 41 is fixedly arranged on the side edge of the screen loading plane 5, two groups of optical coordinate positioners 42 are respectively arranged on the two right-angle side edges of the rectangular bracket 41, and the optical coordinate positioners 42 are vertically aligned with the loading and unloading station 2.
To further optimize the solution described above, the optical coordinate positioning machine 42 is a CCD camera.
In order to further optimize the technical scheme, the two sides of the upper surface of the screen printing plate fixing plate 51 are fixedly provided with sliding rails, the left end and the right end of the scraper seat assembly 65 of the high-precision screen printing pressure mechanism 6 are provided with pulleys matched with the sliding rails, the pulleys are in sliding connection with the screen printing plate fixing plate 51 through the sliding rails, the same-direction sliding with the feeding and discharging sliding table 7 is realized, and the scraper 66 and the ink return knife 67 can move back and forth on the screen printing plate.
A screen printing device working method comprises the following specific steps:
s1: loading the screen 55 into a screen mounting clamping groove 53 corresponding to the screen printer and locking and fixing the screen 55 by rotating a locking and fixing screw 54;
s2: after the screen printing device is ventilated and electrified, starting the screen printing device, and returning the high-precision screen printing pressure mechanism to the original point;
s3: loading a positioning substrate onto a screen printing platform 3 above an upper and lower material sliding table 7, and dripping screen printing ink above a screen printing plate; the positioning substrate is a recycled transparent PET module;
s4: the screen printing device performs automatic/manual vision alignment positioning, wherein the optical coordinate positioning instrument 42 performs positioning, the feeding and discharging sliding table 7 slides to perform alignment, and alignment overlapping of a region to be printed of the positioning substrate and a screen printing region of the screen 55 is realized;
s5: loading a workpiece to be silk-screened onto a silk-screened platform 3, automatically and visually aligning and positioning an optical visual positioning mechanism 5 of a screen printing device, aligning the workpiece to be silk-screened with a silk-screened area of a screen 55, rapidly moving the silk-screened platform 3 to the lower part of the screen 55, and starting silk-screening;
s6: the ink returning knife 67 moves to a lower station close to the upper surface of the screen 55 and moves back and forth, the screen printing ink on the upper surface of the screen 55 is flattened, and the screen printing ink returns to a preparation station through the lifting cylinder 621;
s7: the scraper 66 moves to a lower station, and the screen 55 is contacted under the action of the scraper counterweight mechanism 63, and the screen 55 is printed with silk-screen ink by the front-back movement;
s8: after the scraper 66 finishes the moving action, the scraper returns to the preparation station through the return mechanism 64, the screen printing platform 3 rapidly moves the screen 55 out of the position below the screen loading plane 5 through the feeding and discharging sliding table 7, and moves to the front part of the feeding and discharging station 2;
s9: and taking out the substrate subjected to silk screen printing on the silk screen printing platform 3 automatically or manually, placing good products in a good product area, placing NG products in an NG product area, and repeating S5 to S9. The automatic taking out of the substrate can be realized by utilizing a mechanical arm to automatically control taking and placing.
Examples
1. Loading the silk screen plate into a screen plate mounting clamping groove and locking and fixing the silk screen plate by rotating a locking and fixing screw;
2. the ink returning knife is arranged at the installation position of the scraper seat assembly and is level with the screen surface;
3. the doctor blade is rotatably connected and installed to the installation position of the doctor blade seat assembly through a rotary connecting shaft 635, the doctor blade surface is kept flush with the screen surface through a fine adjustment horizontal adjusting screw 634, the left and right horizontal adjusting screws 634 are fine adjusted, and the doctor blade 66 is aligned in parallel with the screen printing platform 3 in cooperation with the rotary connecting shaft 635;
4. the scraper balancing weight is adjusted according to the requirement of the screen printing pressure, when the requirement of the screen printing pressure is lower, if the requirement of the screen printing pressure is 20N, the scraper balancing weight of 50N is selected, and the trimming balancing weight is adjusted left and right through a balancing trimming structure of the balancing weight, so that the application force of an actual scraper to the screen printing plate is 20N, the screen printing is accurately controlled, and the purpose of low-pressure screen printing is achieved;
5. the weight of the balancing weight of the ink returning knife is regulated until the force applied by the ink returning knife to the silk screen is 10N, so as to achieve the ink returning effect;
6. fixing a workpiece to be screen printed on an upper and lower material sliding table, arranging a positioning hole on the workpiece to be screen printed, optically positioning the workpiece to be screen printed through a CCD camera according to the positioning hole, enabling a screen printing pattern of a screen printing plate to be overlapped with a screen printing pattern required by the workpiece to be screen printed, automatically adjusting the workpiece to be screen printed to a designated position through an automatic alignment structure of the upper and lower material sliding table according to positioning acquisition data, aligning, and then starting screen printing (test printing firstly and normal production later)
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A multi-functional low printing pressure precision screen printing device, comprising: the machine body, a loading and unloading station, a screen printing platform, an optical visual positioning mechanism, a screen loading plane, a high-precision screen printing pressure mechanism and a loading and unloading sliding table which are positioned on the machine body;
the feeding and discharging station and the screen printing platform are positioned below the screen loading plane;
the high-precision silk screen printing pressure mechanism is arranged above the screen loading plane and is in sliding connection with the screen loading plane; the optical visual positioning mechanism is arranged at the edge of the screen loading plane and is positioned above the loading and unloading station; the feeding and discharging sliding table is arranged below the screen loading plane and connected with the screen printing platform, and controls the screen printing platform to move on the feeding and discharging stations;
the high-precision silk screen printing pressure mechanism comprises a return mechanism and a scraper seat assembly; the return mechanism is arranged on the scraper seat assembly;
the return mechanism comprises a cylinder, an ejector rod and a balance rod; the cylinder is connected with the ejector rod and arranged at one end of the balance rod; the balance rod is rotationally connected to a support and a rotating seat fixedly arranged on the scraper seat assembly through a rotating shaft; the air cylinder pushes the ejector rod to enable the balance rod to do lever motion, and the free end of the balance rod moves up and down.
2. The multifunctional low-printing-pressure precise screen printing device according to claim 1, wherein the screen loading plane comprises a screen fixing plate and a plurality of marble supporting columns, wherein the marble supporting columns are fixedly arranged at corner positions of the bottom surface of the screen fixing plate and used for supporting the screen fixing plate to be horizontally balanced; the screen plate is fixed on the bottom surface of the screen plate fixing plate; the marble plate fixing device is characterized in that a screen plate mounting clamping groove is formed in the inner side of each marble pillar on two sides of the lower surface edge of the screen plate fixing plate, and a plurality of locking fixing screws penetrate through the screen plate fixing plate above the screen plate mounting clamping groove.
3. The multifunctional low-printing-pressure precise screen printing device according to claim 2, wherein the high-precision screen printing pressure mechanism further comprises a balance weight fine adjustment mechanism, an ink return knife connecting mechanism, a scraper counter weight mechanism, a scraper and an ink return knife;
the counterweight balance fine adjustment mechanism, the ink return knife connecting mechanism and the scraper counterweight hammer mechanism are arranged on the scraper seat assembly;
the scraper is arranged on one side of the scraper counter weight mechanism close to the screen plate fixing plate; the ink returning knife is arranged on one side, close to the screen plate fixing plate, of the ink returning knife connecting mechanism.
4. The multifunctional low-printing-pressure precise screen printing device according to claim 1, wherein the feeding and discharging stations are provided with two groups of sliding rails, the feeding and discharging sliding tables are arranged on the sliding rails, the screen printing platform is arranged on the feeding and discharging sliding tables, and the feeding and discharging sliding tables drive the screen printing platform to slide in the feeding and discharging stations.
5. A multi-purpose low printing pressure precision screen printing device as recited in claim 3, wherein said scraper counter weight mechanism is mounted in front of said support and swivel, said ink return knife attachment mechanism being mounted between said support and swivel and said return mechanism; the balance weight fine adjustment mechanism is installed at the end of the balance rod, which is provided with the return mechanism, and comprises a screw rod and a fine adjustment balancing weight which is in matched rotation connection with the screw rod, wherein the screw rod is inserted at the end of the balance rod, and the fine adjustment balancing weight is penetrated on the screw rod.
6. A multi-functional low printing pressure precision screen printing device according to claim 3, wherein the scraper counterweight mechanism comprises a scraper counterweight and a scraper connecting piece, and the ink return knife connecting mechanism comprises a lifting cylinder and an ink return knife connecting piece; the upper parts of the scraper connecting piece and the ink return knife connecting piece are respectively fixedly provided with the scraper balancing weight and the lifting cylinder, the lower parts of the scraper connecting piece and the ink return knife connecting piece are respectively fixedly provided with the scraper and the ink return knife, the other ends of the scraper and the ink return knife are contacted with the screen, and the contact pressure between the scraper and the screen and the contact pressure between the ink return knife are controlled through the quality control of the scraper balancing weight and the lifting distance of the lifting cylinder; the middle part of the scraper connecting piece is of a hollow structure, a pulley is fixedly arranged on the upper part of the hollow structure, and the pulley contacts with the upper surface of the free end of the balance rod.
7. The multifunctional low-printing-pressure precise screen printing device according to claim 1, further comprising a protective cover, wherein the protective cover is buckled with the machine body to seal the feeding and discharging station, the screen printing platform, the optical vision positioning mechanism, the screen loading plane, the high-precision screen printing pressure mechanism and the feeding and discharging sliding table.
8. A method of operating a multifunctional low-printing-pressure precision screen printing device according to any one of claims 1 to 7, comprising the specific steps of:
step 1: loading the screen into a screen mounting clamping groove arranged on the inner side of a marble pillar of a screen loading plane corresponding to the screen printing machine, and locking and fixing the screen;
step 2: after the screen printing device is ventilated and electrified, the high-precision screen printing pressure mechanism is started to return to the original point;
step 3: loading the positioning substrate onto a silk-screen printing platform, and adding silk-screen printing ink;
step 4: through the positioning substrate, automatic/manual vision alignment positioning of the screen printing device is performed, and the drawing position of the screen is aligned;
step 5: loading a workpiece to be silk-screened to the silk-screen platform, automatically and visually aligning and positioning the silk-screen platform by the screen printing device, rapidly moving the silk-screen platform to a silk-screen station, and starting silk-screen;
step 6: the ink returning knife of the high-precision silk-screen printing pressure mechanism moves to the lower station and moves back and forth to spread silk-screen printing ink and returns to the preparation station;
step 7: the scraper of the high-precision screen printing pressure mechanism moves to the lower station, and the scraper is contacted with the silk screen to move back and forth under the action of the scraper counterweight hammer mechanism so as to print the screen printing ink on the surface of the substrate through the screen printing;
step 8: the scraper returns to the preparation station after completing the moving action, and the silk-screen printing platform rapidly moves out to the front part of the loading and unloading station;
step 9: and (3) taking out the substrate subjected to silk screen printing on the silk screen printing platform, and repeating the steps 5 to 9.
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