CN110605904B - Full-automatic screen printer - Google Patents
Full-automatic screen printer Download PDFInfo
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- CN110605904B CN110605904B CN201911004292.5A CN201911004292A CN110605904B CN 110605904 B CN110605904 B CN 110605904B CN 201911004292 A CN201911004292 A CN 201911004292A CN 110605904 B CN110605904 B CN 110605904B
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- 238000005406 washing Methods 0.000 claims description 8
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- 230000008878 coupling Effects 0.000 claims description 3
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- 238000009434 installation Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 36
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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
- B41F15/18—Supports for workpieces
- B41F15/20—Supports for workpieces with suction-operated elements
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- 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
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Abstract
The invention discloses a full-automatic screen printer, which comprises a double-platform printing system, a printer head, a head lifting system and a CCD alignment system, wherein the double-platform printing system, the printer head, the head lifting system and the CCD alignment system are arranged on a frame and are electrically connected with a control system, so that the pursuit of zero idle of the printer head when a printing platform takes and places materials is realized, the time wasted by placing the printer head due to the fact that the printing platform moves to a material placing area to take and place materials and align is saved by double-platform printing, and the aims of improving productivity and accelerating working efficiency are achieved. The material taking and placing device has the advantages that the CCD is convenient for aligning and placing, the six-axis robot is arranged for taking and placing materials, the grabbing action can be accurately completed even if the stacking of the materials is slightly uneven during taking, the whole machine is precisely and fully automatically printed, the uniformity of the thickness of the printed film is ensured by adopting a mode of controlling the printing pressure of a doctor blade by adopting a digital constant pressure control of an electric proportional valve in the printing ink printing process, the pressure can be directly visually observed by digital display in a control touch screen, the height lifting structure can be precisely controlled by a cross beam four-column electric cylinder, and the printing is more stable.
Description
Technical Field
The invention relates to the technical field of printers, in particular to a full-automatic screen printer.
Background
At present, the domestic FPC (flexible printed circuit) printing field mostly uses semi-automatic equipment for printing, or full-automatic single-platform printing, and the working efficiency is low.
The semi-automatic printing beam of the conventional machine adopts a motor to drive a printing beam, so that a machine head net arm net frame is lifted, a single platform moves left and right, a placing position fixing product is moved to a printing area for printing, and a positioning program is completed in a mode of lowering the net frame and finely adjusting the platform according to the pattern position of the net frame so as to achieve the printing effect. The printing speed is too slow, the machine head is unstable in lifting tremble, the positioning accuracy is not high, and the like.
Most of the existing screen printers are semi-automatic printers or full-automatic single-platform printers, the operation is troublesome, the product replacement is complicated, the working efficiency is low, the positioning is inaccurate, the printing ink is uneven, and the reject ratio is high.
Disclosure of Invention
The invention aims to provide a full-automatic screen printer which solves the problems in the prior art, and is accurate in whole machine full-automatic printing, accurate in positioning, high in working efficiency, uniform in printing ink and more stable in printing.
In order to achieve the above object, the present invention provides the following solutions: the invention provides a full-automatic screen printer, which comprises a double-platform printing system, a printer head, a head lifting system and a CCD alignment system, wherein the double-platform printing system, the printer head, the head lifting system and the CCD alignment system are arranged on a frame and are electrically connected with a control system,
The dual-platform printing system comprises a printing upper platform device and a printing lower platform device; the upper printing platform device and the lower printing platform device which are arranged on the frame and work in a crossed manner are positioned on an upper parallel surface and a lower parallel surface;
The machine head lifting system comprises a lifting mechanism and a front-rear transmission mechanism, wherein the lifting mechanism comprises four electric cylinders and a first servo motor, the four electric cylinders are respectively and fixedly arranged at the bottoms of four corners of the frame, and the first servo motor is used for driving the four electric cylinders to synchronously stretch out and draw back through a transmission rod and a coupling; the front and rear transmission mechanism comprises a synchronous wheel, a synchronous belt and a second servo motor, the second servo motor is in transmission connection with the synchronous wheels on two sides of the frame, a driven wheel is further arranged on the other end of two sides of the frame, the synchronous belt is in transmission installation between the synchronous wheel and the driven wheel, and two ends of the printing machine head are locked on the synchronous belt on two sides of the frame through connecting plates; and the CCD alignment system arranged on the frame is used for accurately positioning the printer head.
Preferably, two sides of the bottom of the upper printing platform device are in sliding connection with linear guide rails at corresponding positions on the frame, any side of the bottom of the upper printing platform device is driven by a first ball screw arranged on the frame, and a servo motor is in transmission connection with the first ball screw through a coupler; the lifting two sides of the bottom of the printing lower platform device are in sliding connection with linear guide rails at corresponding positions on the frame, any side of the bottom of the printing lower platform device is driven by a ball screw II arranged on the frame, and a servo motor is in transmission connection with the ball screw II through a coupler.
Preferably, the upper printing platform device comprises an upper air suction printing platform, an alignment platform I and a sliding bracket, wherein the alignment platform I is arranged at the top of the sliding bracket, and the upper air suction printing platform is arranged on the alignment platform I and moves along with the alignment platform I; the two sides of the bottom of the sliding support are connected with guide rail sliding blocks, and the guide rail sliding blocks are installed in the linear guide rail in a matched manner; one side of the sliding support is also fixed with a first screw nut seat, and a first screw nut in the first screw nut seat is arranged on the first ball screw.
Preferably, the first fine tuning handles are further installed on two adjacent right-angle side edges of the upper air suction platform, and screw rods in the first fine tuning handles prop against a top plate in the upper air suction platform.
Preferably, the lower printing platform device comprises a lower air suction platform, a second alignment platform and a platform lifting assembly, wherein the second alignment platform is arranged at the top of the platform lifting assembly, and the lower air suction printing platform is arranged on the second alignment platform and moves along with the second alignment platform; the platform lifting assembly comprises a platform lifting guide rail plate, a platform lifting side plate and a ball screw, eight groups of linear guide rails are correspondingly arranged on four plate surfaces of the rectangular frame-shaped platform lifting guide rail plate, each group of guide rails is provided with two sliding blocks, and the sliding blocks are fixedly connected with the inner side surface of the rectangular frame-shaped platform lifting side plate; the platform lifting guide rail plate is provided with a ball screw III driven by a servo motor III through a right-angle speed reducer, and the platform lifting side plate is fixedly provided with a screw nut III which is arranged in a three-phase matching way with the ball screw; the two sides of the bottom of the platform lifting side plate are connected with guide rail sliding blocks, and the guide rail sliding blocks are installed in the linear guide rail in a matched manner; and a second screw nut seat is also fixed on one side of the platform lifting side plate, and a second screw nut in the second screw nut seat is arranged on the second ball screw.
Preferably, the second fine tuning handle is further installed on two adjacent right-angle side edges of the lower air suction platform, and a screw rod in the second fine tuning handle props against a top plate in the lower air suction platform.
Preferably, the output end of the first servo motor is provided with a speed reducer, the speed reducer is in transmission connection with any two adjacent electric cylinders through a coupler and a transmission rod, the other two electric cylinders are in transmission connection with the electric cylinder close to one side of the first servo motor through the coupler and the transmission rod, and the transmission rods connecting the four electric cylinders and the first servo motor form a U shape in the same plane.
Preferably, the CCD alignment system installed on the frame and located on the upper printing platform device includes two camera groups and two camera bases that are rectangular and cross, the two camera groups are opposite sides, each camera group is correspondingly installed with two CCD digital cameras, each digital camera is correspondingly provided with two fine tuning platforms, and the digital cameras realize reciprocating motion on the camera groups through ball screws driven by a transmission motor; the two ends of the two camera units are matched with ball screws on the camera bases at the two sides through screw nuts and reciprocate along the camera bases.
Preferably, the printing machine head is respectively provided with a printing cylinder, an ink return cylinder, an electric proportional valve and a screen washing cylinder, which are respectively used for driving printing, ink return and controlling the printing pressure of a doctor blade and screen washing, the machine head is provided with an ink blade and a scraper in a connecting way at the bottom ends of the printing cylinder and the ink return cylinder, and a balance handle is also arranged on a connecting rod of the cylinder, the ink blade and the scraper; the top of the machine head is also provided with a pressure adjusting handle for adjusting the pressure of the air cylinder.
Compared with the prior art, the invention has the following technical effects:
the full-automatic screen printer disclosed by the invention realizes the pursuit of zero idle of the printer head when the printing platform takes and places materials, and double-platform printing saves the time wasted by placing the printer head due to the fact that the printing platform moves to a material placing area to take and place materials and counterpoint, so that the goals of improving productivity and accelerating working efficiency are achieved. The material taking and placing device has the advantages that the CCD is convenient for aligning and placing, the six-axis robot is arranged for taking and placing materials, the grabbing action can be accurately completed even if the stacking of the materials is slightly uneven during taking, the whole machine is precisely and fully automatically printed, the uniformity of the thickness of the printed film is ensured by adopting a mode of controlling the printing pressure of a doctor blade by adopting a digital constant pressure control of an electric proportional valve in the printing ink printing process, the pressure can be directly visually observed by digital display in a control touch screen, the height lifting structure can be precisely controlled by a cross beam four-column electric cylinder, and the printing is more stable.
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 needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of the overall structure of a full-automatic screen printer;
FIG. 2 is a schematic diagram of the overall structure of a dual-platform cross printing mechanism;
FIG. 3 is a structural diagram of a printing upper platform device;
FIG. 4 is a schematic view of the structure of the lower printing table device;
FIG. 5 is a platform lift assembly layout;
FIG. 6 is a side-to-side shuttle schematic view of an upper and lower platform;
FIG. 7 is a schematic overall construction of a printer head transmission;
FIG. 8 is a diagram showing the structure of a CCD alignment system;
FIG. 9 is a structural view of a printer head;
Wherein, 1a servo motor II; 2, a first servo motor; 3, a linear guide rail; 4, printing a platform device; 41 upper suction platform; 42UVW counterpoint platform I; 43 a skid bracket; 44 screw nut seat I; 45 fine tuning the first handle; 5 printing a lower platform device; 51 lower suction platform; 52UVW alignment platform II; 53 lifting the guide rail plate of the platform; 54, lifting a side plate of the platform; 55 servo motor III; 56 right angle speed reducer; 57 screw nut seat II; 58 ball screw three; 510 lifting screw rod seats of the platform; 511 a sliding bottom plate; 512 platform lifting cross plates; 513UVW platform fixing plate; 514 a platform screw nut seat; 6, a limit buffer ring of the running table; 7, an optoelectronic switch; 8a frame; 9 ball screw I; 10, a coupling; 11 a guide rail slide block; 12 ball screw II; 13 double synchronous belts; 14 synchronizing wheels; 15 servo motor III; a 16 speed reducer; 17 transmission rods; 18 machine heads; 19 connecting plates; 20 electric cylinders; a servo motor IV 21; a 22 camera base; 23 a drive motor; 24 fine tuning the platform; a 25 digital camera; 26 lenses; 27 light sources; 30 ink knives; 31 printing cylinders; 32 ink return cylinders; 33 mesh washing air cylinders; 34 pressure adjustment handle; a 35 scraper; 36, taking a discharging alignment area; 37 printing an area; 38 robots; 39 electric proportional valve.
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 invention aims to provide a full-automatic screen printer which solves the problems in the prior art, and is accurate in whole machine full-automatic printing, accurate in positioning, high in working efficiency, uniform in printing ink and more stable in printing.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
As shown in fig. 1-the present invention provides a fully automatic screen printer comprising a dual stage printing system mounted on a frame and electrically coupled to a control system, a printer head, a head lift system, and a CCD alignment system.
Dual-platform printing system:
The upper printing table device 4 and the lower printing table device 5 mounted on the frame 8 are on the same parallel line. The first servo motor 2 outputs power, the first ball screw is connected through the coupler 10, the first ball screw drives the printing upper platform device 4 to move left and right on the linear guide rails 3, and three sliding blocks are arranged on each linear guide rail 3 to enable the platform to move left and right in a reciprocating mode more stably. Similarly, the second servo motor 1 outputs power and is connected with the second ball screw through the coupler 10, and the second ball screw drives the printing lower platform device 5 to move left and right on the linear guide rail 3.
The upper printing platform device 4 mainly comprises an upper air suction platform 41, a UVW alignment platform I42, a fine adjustment handle I45, a sliding bracket 43, a guide rail sliding block 11 and a screw-nut seat I. The first lead screw nut seat and the plurality of guide rail sliding blocks 11 are used for assembling and driving the first ball screw of the upper printing platform device 4 and the linear guide rail 3, so that the upper printing platform device 4 precisely and stably drives and reciprocates left and right in a linear motion.
The sliding support 43 is used for installing the UVW alignment platform I42 and connecting and supporting the guide rail slide block 11 and the screw nut I. The UVW alignment platform is used for shooting the current position of the printing material by matching with the CCD camera, and the platform moves to a correct posture according to the translation and rotation actions of the current position, namely the functions of x movement and angle rotation of the platform, so that the full-automatic alignment of the printing material is realized. The upper suction platform 41 is mounted on the UVW alignment platform one 42 to move with translation and rotation on the UVW alignment platform one 42. The device is used as a workbench for adsorbing printing materials for printing.
The first fine tuning handle 45 is arranged on two adjacent right-angle side edges of the upper air suction platform 41, the working principle is that the screw rod in the handle props against the top plate in the air suction printing platform to drive the platform to move forwards, backwards, leftwards and rightwards by manually rotating the fine tuning handle, and the main effect is that the single screen frame is approximately consistent with the position of the double platforms when the position of the screen plate is primarily debugged according to different printing processes of the product.
The printing lower platform device 5 mainly comprises a lower air suction platform 51, a UVW alignment platform II 52, a fine adjustment handle II 59, a linear guide rail 3, a platform lifting guide rail plate 53, a platform lifting side plate 54, a guide rail slide block 11, a servo motor III 55, a right angle speed reducer 56, a ball screw III and a screw nut seat II.
The second lead screw nut seat and the plurality of guide rail sliding blocks 11 are used for assembling and driving the second ball screw of the lower printing platform device 5 and the linear guide rail 3, so that the lower printing platform device 5 precisely and stably drives and moves back and forth in a left-right linear manner.
The servo motor III 55 and the right-angle speed reducer 56 are used as platform lifting output power, and are connected with a ball screw III through a coupler 10, and the ball screw III drives the platform to move up and down on the guide rail. Eight groups of linear guide rails 3 are arranged on the platform lifting guide rail plates 53 of the four side walls of the printing platform device, each group of guide rails is provided with two sliding blocks, and the two groups of guide rails on each side can ensure that the printing platform can accurately and stably lift.
The servo motor III 55 and the right-angle speed reducer 56 receive lifting instructions and then output power, the right-angle speed reducer 56 is connected with the platform lifting screw rod seat 510 and the sliding bottom plate 511, the sliding bottom plate 511 and the platform lifting side plate 54 are fixedly connected, and the platform lifting side plate 54 and the sliding bottom plate 511 are fixedly moved during lifting of the platform. The servo motor III 55 outputs power to be connected with a screw rod through the coupler 10, the screw rod rotates and moves, and meanwhile, the screw rod rotates to drive the screw rod nut seat III to lift. The screw-nut seat three and the platform lifting transverse plate 512, the platform lifting guide rail plate 53 and the UVW platform fixing plate 513 are sequentially and fixedly connected and installed, so that when the screw rod rotates, the platform screw-nut seat 514 is driven to lift, and simultaneously, the parts which are associated with the screw-nut seat three and the platform lifting transverse plate are lifted together.
The machine head lifting system comprises:
The lifting mechanism comprises four electric cylinders 20 and four servo motors 21, the four electric cylinders 20 are respectively and fixedly arranged at the bottoms of four corners of the frame 8, and the four servo motors 21 are used for driving the four electric cylinders 20 to synchronously stretch and retract through a transmission rod 17 and a coupler 10; the front and rear transmission mechanism comprises a machine head 18, a synchronous wheel 14, a synchronous belt and a servo motor III 15, the output end of the servo motor III 15 is connected with a speed reducer 16, the speed reducer 16 is in transmission connection with the synchronous wheels 14 on two sides of the machine frame 8 through a coupler 10 and a transmission rod 17, the other ends of the two sides of the machine frame 8 are also provided with driven wheels, the synchronous belt is in transmission connection between the synchronous wheels 14 and the driven wheels, two ends of the machine head 18 are locked on the synchronous belts on two sides of the machine frame 8 through connecting plates 19, and the top of the machine head 18 is connected with a main body of the printer.
The output end of the servo motor IV 21 is provided with a speed reducer 16, the speed reducer 16 is in transmission connection with any two adjacent electric cylinders 20 through a coupler 10 and a transmission rod 17, the other two electric cylinders 20 are in transmission connection with the electric cylinders 20 close to the servo motor IV 21 side through the coupler 10 and the transmission rod 17, and the transmission rod 17 connecting the four electric cylinders 20 and the servo motor IV 21 forms a U shape in the same plane.
In the lifting mechanism, a servo motor four 21 and a speed reducer 16 are used as power input, four electric cylinders 20 are connected through a coupler 10 and a transmission rod 17, the four electric cylinders 20 and a motor are assembled into a U shape and are positioned on the same plane, space can be saved to the greatest extent, the installation of other parts is not influenced, stable lifting is guaranteed by the four electric cylinders 20 connected with four corners of a frame 8, accurate speed control can be guaranteed by the transmission of the electric cylinders 20, and the purposes of accurate position control, stable movement and low noise are achieved by lifting of a machine head 18. At the same time, the structure of the electric cylinder 20 transmission has the advantages of easy maintenance and long service life. Four electric cylinders 20 are connected with four corners of the frame 8 of the machine head 18 to ensure stable lifting. The printing screen frame is locked by the electric cylinder 20, is an automatic pneumatic locking screen plate, is directly connected and fixed on the cross beam, and is independently pneumatic off-screen, so that the printing screen frame is more accurate and more convenient to position and adjust in a mode of fixing the screen frame than a conventional movable screen arm and is fixed on the cross beam. The printing is more stable, and the adverse effects such as trembling and the like are reduced.
Further, linear guide rails 3 are further arranged at positions, corresponding to the synchronous belts, on two sides of the frame 8 in the front and rear transmission mechanism, and sliding blocks which are slidably arranged on the linear guide rails 3 are fixedly connected with the connecting plates 19. The servo motor III 15 and the speed reducer 16 which are arranged on the square frame 8 of the machine head 18 are used as power input, and are connected with the synchronous wheel 14 and the double synchronous belt 13 through the coupler 10 and the transmission rod 17, so that the transverse force input is changed into longitudinal input. The two ends of the machine head 18 are locked on the guide rail slide blocks through the connecting plates 19, so that the stress at the two ends of the machine head 18 is balanced, and the machine head 18 is driven to move back and forth on the guide rail smoothly. The servo motor is used for driving a control object, the torque and the rotating speed of the controlled object are controlled by pulse signal voltage, and when the size and the polarity of the pulse signal voltage are changed, the rotating speed and the rotating direction of the motor are also changed.
CCD counterpoint system:
the CCD alignment system arranged on the frame 8 and positioned on the printing upper platform device 4 comprises two camera groups and two camera bases 22 which are arranged in a rectangular cross manner, wherein the two camera groups are opposite to each other, each camera group is respectively provided with two CCD digital cameras 25 correspondingly, each digital camera 25 is correspondingly provided with two fine adjustment platforms 24, and the digital cameras 25 realize reciprocating motion on the camera groups through ball screws driven by a transmission motor 23; the two ends of the two camera units are matched with ball screws on the camera bases 22 on the two sides through screw nuts and reciprocate along the camera bases 22. A light source 27 is provided at a lens 26 of the digital camera 25.
The transmission of the camera is ball screw transmission, the servo motor is power, 4 digital cameras 25 are adopted to grasp mark points, the fine adjustment platform 24 can adjust camera resolution and fine adjustment, camera pictures can be directly displayed on a computer display screen to align, printing precision of materials can be accurately ensured through four-point alignment, CCD automatic alignment is more accurate and rapid than manual alignment, and full-automatic accurate alignment can be achieved.
Printing machine head:
The machine head 18 is respectively provided with a printing cylinder 31, an ink return cylinder 32 and a screen washing cylinder 33 which are respectively used for driving printing, ink return and screen washing, the machine head 18 is connected with an ink knife 30 and a scraper 35 at the bottom ends of the printing cylinder 31 and the ink return cylinder 32, and a balance handle 36 is also arranged on a connecting rod of the cylinder and the ink knife 30 and the scraper 35; the top of the handpiece 18 is also provided with a pressure adjustment handle 34 for adjusting the cylinder pressure. When the head 18 moves from one side of the printing platform to the other side for printing, the printing cylinder 31 controls the extension state of the doctor 35, the ink knife 30 is in the initial contracted state, and the electric proportional valve 39 controls the printing pressure of the doctor 35. The doctor 35 is returned to its original state by the cylinder after the printing operation is completed, and the ink return cylinder 32 is used for controlling the ink knife 30 to scrape the ink from the present position to the original position of the platen, and then the ink knife 30 is returned to the original position, and the ink is circulated in sequence. The screen washing cylinder 33 controls the upward movement of the head 18 when the screen is installed or required to be washed, so that the head 18 and the screen are spaced apart by a sufficient space to install or wash the screen. The printing ink adopts the mode of controlling the printing pressure of a doctor blade by adopting the digital constant pressure of an electric proportional valve 39 to ensure the uniformity of the printing film thickness, so that the precision printing requirement can be met.
The front and back fixed printer heads are connected with a belt transmission through a sliding block and a guide rail. The machine head 18 has a lifting function and adopts a sliding rail to connect with a cylinder for transmission, so that the screen frame structure is parallel to the machine head structure, the machine head can be lifted for the convenience of the disassembly of the screen plate, and the doctor blade is higher than the height of the frame of the screen plate, so that the design is humanized.
The working steps of the full-automatic screen printer in the invention are as follows:
step 1:
after starting up, the system needs to be reset firstly, all actions return to the set origin position,
The initial position of the upper printing platform is in the pick-and-place alignment area 36,
The lower print platform home position is below the print zone 37 position,
The origin of the CCD alignment system is located at the left side of the pick-and-place area in order not to affect manual pick-and-place or automatic pick-and-place by the robot 38.
After the materials are placed, the induced draft platform system starts to automatically induced draft and fix, then the CCD vision alignment system controls the cameras to enter a material alignment area, four corners of the lenses of the 4 high-definition cameras are used for alignment in the alignment area, the system can control each camera to independently act, the UVW alignment platform is matched with the CCD cameras to shoot the current position of the printed materials, the platform moves to a correct posture according to the current position to realize full-automatic material alignment, materials with different specifications are conveniently aligned, the positions can be stored in the system after the first fine adjustment is finished, then the alignment is automatically returned to the adjustment position for each time in the automatic mode of the system, the repeated alignment error is not more than +/-0.02, the alignment is more accurate, and the four-point alignment condition can be directly displayed on the CCD display screen to observe the alignment condition.
Step 2: after the automatic alignment is completed, the CCD lens returns to the original point, the system automatically starts a printing command,
The upper suction platform 41 will move left to the print area 37 for printing,
At the same time, the lower suction platform 51 moves right through the upper suction platform 41 to reach the lower part of the discharging area, the system control automatically rises,
After the upper suction platform 41 reaches the printing area 37, the upper platform is fixed and the beam descends to the machine head for printing,
At the same time of printing on the upper air suction platform 41, the lower air suction platform 51 moves to the material taking and placing alignment area at the same time, and CCD alignment is performed after the material placing is completed.
Step 3: when the printing of the upper suction platform 41 is completed, and the alignment of the lower suction platform 51 is completed,
The lower suction platform 51 starts to descend, and, after descending to the movable position,
The upper printing stage 41 moves rightward to the pick-and-place region, and starts the pick-and-place operation.
While the lower suction platform 51 moves left through the upper suction platform 41 to below the printing position,
The lower suction platform 51 is then raised to the position to be printed and the four-column cross beam is lowered and the head 18 begins the printing action.
And so on. The automatic feeding and discharging robot 38 can be arranged at the discharging position, so that full-automatic intelligent production can be realized.
The full-automatic screen printer has the following advantages:
1. The four-column electric cylinder 20 is selected to lift, so that the printer is more stable than a printer with a beam lifting structure, the lifting height and the lifting speed of the printer head can be accurately controlled, and the noise is low.
2. The printing platform achieves the purpose of double-platform cross printing in a lifting platform mode, the printing platform is divided into a printing area 37 and a material taking and discharging counterpoint area 36, and the printing is more efficient due to the definite area division of division work.
3. Adopt the full-automatic accurate counterpoint of CCD, cooperation UVW counterpoint platform, accomplish full-automatic operation, theory of operation is that printing platform initial position is in the right side of printing district go up the unloading position, the induced draft system of placing the material back platform adsorbs fixed material CCD camera and gets into CCD vision counterpoint district under ball screw and the control of private clothes motor, adopt 4 high definition camera lenses to take a picture and carry out the accurate counterpoint of two at least mark points, four-point counterpoint can be realized more accurately guaranteeing the high accuracy printing requirement, counterpoint live situation can direct display be convenient for observe on the display. After the automatic alignment is finished, a printing command is automatically started, and the printing platform descends into the belly and is accurately transmitted to a printing area for printing under the power of the ball screw and the servo motor.
4. The CCD lens returns to the standby origin, and is positioned at the left side of the material taking and discharging alignment area, so that manual material taking and discharging is not influenced, or (the automatic material taking and discharging mechanism and the intelligent six-axis robot are additionally arranged for material taking and discharging) the printing product is subjected to material taking and discharging actions, so that the effect of efficient automatic production is achieved.
5. The printing ink adopts a mode of controlling the printing pressure of a doctor blade by adopting a digital constant pressure of an electric proportional valve to ensure the uniformity of the printing film thickness, so that the precision printing requirement can be met.
6. The platform is placed with the material at the material placing position to finish the alignment, then the platform descends to enter the belly to move left and right, so that the platform is ensured not to influence other parts in the moving process, the printing position is raised to the screen position for printing, and the printing surface is prevented from being polluted by the action of descending the material placing position after the printing is finished.
7. The system can save parameters set by various production products, can directly call the parameters in the subsequent production of the products with the same material number, or can directly sweep the two-dimensional code edited by the material number to select to save or call the two-dimensional code for use, and gradually realizes intelligent manufacturing management by docking the MES system.
The principles and embodiments of the present invention have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present invention; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (7)
1. A full-automatic screen printer, characterized in that: comprises a double-platform printing system, a printing machine head, a machine head lifting system and a CCD alignment system which are arranged on a frame and are electrically connected with a control system,
The dual-platform printing system comprises a printing upper platform device and a printing lower platform device; the upper printing platform device and the lower printing platform device which are arranged on the frame and work in a crossed manner are positioned on an upper parallel surface and a lower parallel surface; the printing upper platform device comprises an upper air suction platform, an alignment platform I and a sliding support, wherein the alignment platform I is arranged at the top of the sliding support, and the upper air suction platform is arranged on the alignment platform I and moves along with the alignment platform I; the two sides of the bottom of the sliding support are connected with guide rail sliding blocks, and the guide rail sliding blocks are installed in the linear guide rail in a matched manner; one side of the sliding support is also fixed with a first screw nut seat, and a first screw nut in the first screw nut seat is arranged on the first ball screw; the printing lower platform device comprises a lower air suction platform, a second alignment platform and a platform lifting assembly, wherein the second alignment platform is arranged at the top of the platform lifting assembly, and the lower air suction platform is arranged on the second alignment platform and moves along with the second alignment platform; the platform lifting assembly comprises a platform lifting guide rail plate, a platform lifting side plate and a ball screw, eight groups of linear guide rails are correspondingly arranged on four plate surfaces of the rectangular frame-shaped platform lifting guide rail plate, each group of guide rails is provided with two sliding blocks, and the sliding blocks are fixedly connected with the inner side surface of the rectangular frame-shaped platform lifting side plate; the platform lifting guide rail plate is provided with a ball screw III driven by a servo motor III through a right-angle speed reducer, and the platform lifting side plate is fixedly provided with a screw nut III which is arranged in a three-phase matching way with the ball screw; the two sides of the bottom of the platform lifting side plate are connected with guide rail sliding blocks, and the guide rail sliding blocks are installed in the linear guide rail in a matched manner; a second screw nut seat is also fixed on one side of the platform lifting side plate, and a second screw nut in the second screw nut seat is arranged on the second ball screw;
The machine head lifting system comprises a lifting mechanism and a front-rear transmission mechanism, wherein the lifting mechanism comprises four electric cylinders and a first servo motor, the four electric cylinders are respectively and fixedly arranged at the bottoms of four corners of the frame, and the first servo motor is used for driving the four electric cylinders to synchronously stretch out and draw back through a transmission rod and a coupling; the front and rear transmission mechanism comprises a synchronous wheel, a synchronous belt and a second servo motor, the second servo motor is in transmission connection with the synchronous wheels on two sides of the frame, a driven wheel is further arranged on the other end of two sides of the frame, the synchronous belt is in transmission installation between the synchronous wheel and the driven wheel, and two ends of the printer head are locked on the synchronous belt on two sides of the frame through connecting plates; and the CCD alignment system arranged on the frame is used for accurately positioning the printer head.
2. The fully automatic screen printer of claim 1, wherein: the two sides of the bottom of the printing upper platform device are in sliding connection with the linear guide rails at corresponding positions on the frame, any side of the bottom of the printing upper platform device is driven by a first ball screw arranged on the frame, and a servo motor is in transmission connection with the first ball screw through a coupler; the lifting two sides of the bottom of the printing lower platform device are in sliding connection with linear guide rails at corresponding positions on the frame, any side of the bottom of the printing lower platform device is driven by a ball screw II arranged on the frame, and a servo motor is in transmission connection with the ball screw II through a coupler.
3. The fully automatic screen printer of claim 1, wherein: and a first fine tuning handle is further installed on two adjacent right-angle side edges of the upper air suction platform, and a screw rod in the first fine tuning handle props against a top plate in the upper air suction platform.
4. The fully automatic screen printer of claim 1, wherein: and a second fine tuning handle is further installed on two adjacent right-angle side edges of the lower air suction platform, and a screw rod in the second fine tuning handle props against a top plate in the lower air suction platform.
5. The fully automatic screen printer of claim 1, wherein: the output end of the first servo motor is provided with a speed reducer, the speed reducer is in transmission connection with any two adjacent electric cylinders through a coupler and a transmission rod, the other two electric cylinders are in transmission connection with the electric cylinder close to one side of the first servo motor through the coupler and the transmission rod, and the transmission rod connecting the four electric cylinders and the first servo motor forms a U shape in the same plane.
6. The fully automatic screen printer of claim 1, wherein: the CCD alignment system arranged on the frame and positioned on the printing upper platform device comprises two camera groups and two camera bases, wherein the two camera groups are arranged in a rectangular cross mode, the two camera groups are opposite sides, each camera group is respectively provided with two CCD digital cameras, each digital camera is correspondingly provided with two fine adjustment platforms, and the digital cameras realize reciprocating motion on the camera groups through ball screws driven by a transmission motor; the two ends of the two camera units are matched with ball screws on the camera bases at the two sides through screw nuts and reciprocate along the camera bases.
7. The fully automatic screen printer of claim 1, wherein: the printing machine head is respectively provided with a printing cylinder, an ink return cylinder, an electric proportional valve and a screen washing cylinder, and is respectively used for driving printing, ink return, controlling the printing pressure of a doctor and screen washing; the top of the machine head is also provided with a pressure adjusting handle for adjusting the pressure of the air cylinder.
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| CN201911004292.5A CN110605904B (en) | 2019-10-22 | 2019-10-22 | Full-automatic screen printer |
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| CN201911004292.5A CN110605904B (en) | 2019-10-22 | 2019-10-22 | Full-automatic screen printer |
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| CN111873614A (en) * | 2020-08-24 | 2020-11-03 | 长沙建宇网印机电设备有限公司 | Desktop formula screen printing equipment |
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| CN115339226B (en) * | 2022-09-05 | 2024-01-26 | 深圳光远智能装备股份有限公司 | Front-back offset printing device for photovoltaic cell |
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