CN114179497A - Screen printing machine - Google Patents
Screen printing machine Download PDFInfo
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- CN114179497A CN114179497A CN202111340400.3A CN202111340400A CN114179497A CN 114179497 A CN114179497 A CN 114179497A CN 202111340400 A CN202111340400 A CN 202111340400A CN 114179497 A CN114179497 A CN 114179497A
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- screen printing
- printing
- feeding
- conveying
- platform
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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
- 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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Screen Printers (AREA)
Abstract
The invention discloses a screen printer, comprising: a frame having a work surface; the feeding mechanism is arranged on the frame and used for placing a printing stock; the conveying platform is arranged on the working table surface and is provided with a feeding position, a printing position and a discharging position which are sequentially arranged at intervals along the length direction of the conveying platform, and the feeding position is positioned at one end of the conveying platform, which is close to the feeding mechanism; the material conveying mechanism is movably arranged on the rack so as to move between the feeding mechanism and the feeding position, and is used for moving the printing stock from the feeding mechanism to the feeding position; the screen printing plate is arranged on the machine frame in a lifting mode and is positioned above the printing position so as to be close to or far away from the printing position along the longitudinal direction; and the scraping plate is movably arranged on the frame and positioned on the top surface of the screen printing plate, and can move along the length direction of the conveying platform so as to press and scrape ink. The screen printer can improve the printing efficiency of the screen printer.
Description
Technical Field
The invention relates to the technical field of screen printing, in particular to a screen printing machine.
Background
In the silk-screen printing, characters and images to be printed are firstly made into a silk-screen printing plate, the silk-screen printing plate is arranged on a silk-screen printing machine, and then ink is extruded by a scraper through the silk-screen printing plate and is adhered on a printing stock (such as textiles, metal plates, plastic cement, leather templates, glass and ceramics), so that patterns identical to the silk-screen printing plate are silk-screened on the printing stock. In the screen printing machine in the related art, after the material conveying mechanism takes the printing stock from the feeding mechanism, the printing stock is directly conveyed to the lower part of the screen printing plate and then returns to the feeding mechanism to take the material again, so that too much time is consumed once for all, the screen printing plate and the scraper are more in a material waiting state, and the printing efficiency of the screen printing machine is lower.
The above is only for the purpose of assisting understanding of the technical solutions of the present invention, and does not represent an admission that the above is the prior art.
Disclosure of Invention
The invention mainly aims to provide a screen printer and aims to solve the technical problem of improving the printing efficiency of the screen printer.
To achieve the above object, the screen printer of the present invention comprises:
a frame having a worktop;
the feeding mechanism is arranged on the frame and used for placing a printing stock;
the conveying platform is arranged on the working table surface and is provided with a feeding position, a printing position and a discharging position which are sequentially arranged at intervals along the length direction of the conveying platform, and the feeding position is positioned at one end, close to the feeding mechanism, of the conveying platform;
the material conveying mechanism is movably arranged on the rack so as to move between the feeding mechanism and the feeding position, and is used for moving the printing stock from the feeding mechanism to the feeding position;
the screen printing plate is arranged on the machine frame in a lifting mode and is positioned above the printing position so as to be close to or far away from the printing position along the longitudinal direction;
and the scraping plate is movably arranged on the rack and positioned on the top surface of the screen printing plate, and can move along the length direction of the conveying platform so as to press and scrape ink.
Optionally, the screen printing machine further comprises a positioning mechanism mounted on the working table, the positioning mechanism is arranged between the conveying platform and the feeding mechanism, and the positioning mechanism is used for adjusting the placing state of the printing stock;
the material conveying mechanism is provided with a first material conveying stroke for moving the printing stock from the feeding mechanism to the positioning mechanism and a second material conveying stroke for moving the printing stock from the positioning mechanism to the material feeding position.
Optionally, pass the material mechanism including move carry the module with install in move the first material arm and the second that move the module and pass the material arm, first material arm and second pass the material arm and set up along passing material direction interval, it is used for synchronous drive to move the module move first material arm and second and pass the material arm, so that first material arm is in feed mechanism with move between the positioning mechanism, and make second pass the material arm be in positioning mechanism with move between the material feeding level.
Optionally, the screen printing machine further comprises a transfer platform, the feed mechanism being located at a transfer end of the transfer platform for substrate placement from the transfer platform, the transfer platform having a standby feed position for at least one set of standby substrate placements.
Optionally, the feeding mechanism comprises a lifting device and a discharging table mounted on the lifting device, and the discharging table can be lifted along with the lifting device to convey the printing stock to the material taking height of the material conveying mechanism.
Optionally, the screen printing machine further comprises a blanking mechanism movably mounted on the frame, the blanking mechanism is located above the discharging position, and a moving track of the blanking mechanism extends from the upper side of the discharging position to the end portion protruding out of the conveying platform along the transverse direction.
Optionally, the conveying platform comprises a conveying belt, and the conveying belt is provided with air holes; the screen printing machine further comprises a negative pressure device, the negative pressure device is provided with a negative pressure cavity used for generating adsorption force, and the negative pressure cavity is located below the conveying belt and communicated with the air holes so as to adsorb and fix the printing stock placed on the conveying belt.
Optionally, the screen printing machine further comprises an encoder mounted to the frame, the encoder being configured to monitor a transport displacement of the transport platform at each transport stroke.
Optionally, the feeding mechanism further comprises an optical fiber sensor for detecting the height of the printing material stacked on the feeding table.
Optionally, the screen printing machine further comprises a lifting module and a traverse module, the lifting module is mounted on the frame, and the screen plate and the traverse module are mounted on the lifting module to lift with the lifting module;
the traversing module is provided with a moving arm which is positioned above the screen printing plate; the scraper blade includes scribble black scraper blade and scraping ink scraper blade, scribble black scraper blade and scraping ink scraper blade liftable connect in the removal arm to in turn butt joint in the screen printing plate.
The screen printing machine is provided with the conveying platform on the rack, and the conveying platform is provided with the feeding position, the printing position and the discharging position, so that after the material conveying mechanism takes the printing stock from the feeding mechanism, the printing stock is only required to be transferred to the feeding position, and the conveying platform can convey the printing stock from the feeding position to the printing position so as to be matched with the screen printing plate and the scraper plate for printing; in the process of conveying the printing stock by the conveying platform, the material conveying mechanism can synchronously return to the feeding mechanism to take materials again, so that the material returning and taking time of the material conveying mechanism can be shortened, the interval time of two adjacent printing processes is shortened, and the printing efficiency of the screen printing machine can be improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of one embodiment of a screen printing machine according to the present invention;
FIG. 2 is a schematic structural view of another embodiment of a screen printing machine according to the present invention;
FIG. 3 is a schematic cross-sectional view of one embodiment of a screen printing machine according to the present invention;
FIG. 4 is a schematic structural view of an embodiment of a material conveying mechanism according to the present invention;
FIG. 5 is a schematic structural diagram of a conveying platform according to an embodiment of the present invention;
FIG. 6 is a schematic cross-sectional view of one embodiment of a transport platform of the present invention;
FIG. 7 is a schematic structural diagram of a transfer platform according to an embodiment of the present invention;
FIG. 8 is a schematic structural view of an embodiment of a loading mechanism according to the present invention;
fig. 9 is a partial schematic structural view of an embodiment of the screen printing machine of the present invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) | Reference numerals | Name (R) |
| 10 | |
11 | Working table | 20 | |
| 30 | |
31 | Level of |
32 | |
| 33 | |
40 | |
50 | |
| 111 | |
70 | |
41 | |
| 42 | First material conveying arm | 43 | Second |
80 | |
| 81 | Material loading position for |
21 | |
22 | Discharging table |
| 90 | |
34 | Conveying |
341 | |
| 35 | |
100 | |
110 | |
| 61 | Ink- |
62 | |
120 | Printing material |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B," including either the A or B arrangement, or both A and B satisfied arrangement. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The present invention proposes a screen printing machine for printing a preset pattern on a substrate 120.
In an embodiment of the present invention, as shown in fig. 1 to 9, the screen printer includes: a frame 10, said frame 10 having a worktop 11; a feeding mechanism 20 mounted on the frame 10, the feeding mechanism 20 being used for placing a printing material 120; the conveying platform 30 is installed on the working table 11, the conveying platform 30 is provided with a feeding position 31, a printing position 32 and a discharging position 33 which are sequentially arranged at intervals along the length direction of the conveying platform, and the feeding position 31 is located at one end, close to the feeding mechanism 20, of the conveying platform 30; a material transfer mechanism 40 movably mounted to the frame 10 for movement between the feeding mechanism 20 and the feeding position 31, the material transfer mechanism 40 being configured to move the substrate 120 from the feeding mechanism 20 to the feeding position 31; the screen printing plate 50 is arranged on the machine frame 10 in a lifting mode, and the screen printing plate 50 is located above the printing position 32 and is close to or far away from the printing position 32 along the longitudinal direction; and the scraping plate is movably arranged on the frame 10 and is positioned on the top surface of the screen printing plate 50, and the scraping plate can move along the length direction of the conveying platform 30 so as to press and scrape ink.
In this embodiment, the frame 10 is used for mounting functional components of a screen printing machine, and the functional components are generally mounted on the table 11 of the frame 10, and form a printing line on the table 11, so that the printing material 120 entering the printing line is printed with a pattern in order and then leaves the printing line.
The feeding mechanism 20 is located at the beginning of the printing water flow line, the specific form of the feeding mechanism 20 is not limited, and only the requirement for placing the printing material 120 is met, and the printing material 120 is transferred to the subsequent printing process from the feeding mechanism 20.
The conveyor platform 30 includes two rollers and a belt 34 wound around the two rollers, and the belt 34 circulates around the rollers. The feeding position 31, the printing position 32 and the discharging position 33 are positioned on the top surface of the output belt, and along with the movement of the conveying belt 34, the feeding position 31 is transferred to the printing position 32, and the printing position 32 is transferred to the discharging position 33; after the transfer of the original feed location 31, the conveyor 34 arriving in circulation again forms a new feed location 31.
The material transfer mechanism 40 is used for moving the printing material 120 from the feeding mechanism 20 to the feeding position 31 of the conveying platform 30, and the specific form of the material transfer mechanism 40 is not limited. For example, the material conveying mechanism 40 may include an articulated robot arm, which is pivotally movable back and forth between the loading mechanism 20 and the feeding level 31. The material transfer mechanism 40 can suck the printing material 120 through the suction cups to reduce mechanical acting force on the printing material 120 and avoid damage to the printing material 120.
After the substrate 120 is moved to the feeding position 31, the conveying platform 30 further conveys the substrate 120 to the printing position 32, i.e. below the screen plate 50. After the printing material 120 reaches below the screen printing plate 50, the screen printing plate 50 approaches the printing position 32 to press the printing material 120, and then the scraper with the ink scrapes the ink along the length direction of the screen printing plate 50, so that the ink is extruded onto the printing material 120.
The scraper can be directly connected with the screen printing plate 50 so as to be driven by the screen printing plate 50 to lift, and the scraper can also transversely move relative to the screen printing plate 50; of course, the squeegee may be mounted on the frame 10 as long as the squeegee is movable up and down with respect to the screen plate 50 and movable laterally with respect to the screen plate 50.
After the printing material 120 is printed with the pattern at the printing position 32, it is further transported by the transporting platform 30 to the discharging position 33 for subsequent discharging or entering a subsequent processing line.
Compared with the prior art, in the application, the material transfer mechanism 40 firstly transfers the printing stock 120 to the feeding position 31 of the conveying platform 30, and then the conveying platform 30 conveys the printing stock 120 to the lower part of the screen printing plate 50; during the process of conveying the printing material 120 by the conveying platform 30, the material conveying mechanism 40 can return to the loading mechanism 20 to take materials again; therefore, each round trip of the material conveying mechanism 40 can be reduced, and each round trip time of the material conveying mechanism 40 is shortened; the shortened stroke of the material transfer mechanism 40 can be replaced by the movement of the conveying platform 30, that is, after the material transfer mechanism 40 takes the printed material 120 again, the feeding position 31 is vacant, so that the material transfer mechanism 40 can place the printed material 120 at the feeding position 31 again without waiting, and therefore, the waiting interval of the screen printing machine in each two adjacent printing processes can be reduced, and the printing efficiency is improved.
The screen printing machine is provided with a conveying platform 30 on a machine frame 10, and a feeding position 31, a printing position 32 and a discharging position 33 are arranged on the conveying platform 30, so that after a material conveying mechanism 40 takes a printed material 120 from a feeding mechanism 20, the printed material 120 only needs to be conveyed to the feeding position, and the conveying platform 30 can convey the printed material 120 from the feeding position 31 to the printing position 32 so as to be matched with a screen plate 50 and a scraper for printing; in the process of conveying the printing stock 120 by the conveying platform 30, the material conveying mechanism 40 can synchronously return to the feeding mechanism 20 to take materials again, so that the material returning and taking time of the material conveying mechanism 40 can be shortened, the interval duration of two adjacent printing processes can be shortened, and the printing efficiency of the screen printing machine can be improved.
Specifically, as shown in fig. 1 to 3, the screen printing machine further includes a positioning mechanism 70 mounted on the work table 11, the positioning mechanism 70 is disposed between the conveying platform 30 and the feeding mechanism 20, and the positioning mechanism 70 is configured to adjust a placing state of the substrate 120;
the feeding mechanism 40 has a first feeding stroke for moving the printing material 120 from the feeding mechanism 20 to the positioning mechanism 70, and a second feeding stroke for moving the printing material 120 from the positioning mechanism 70 to the feeding position 31.
In the feeding process of the printing material 120, if the placing angle or position is not accurate, the ink is printed to the non-preset position of the printing material 120, which results in the generation of a printing defective product. Therefore, the positioning mechanism 70 is required to adjust the angle or position of the object 120 to correspond to the position and angle of the screen plate 50. Taking the screen printing plate 50 as a reference object, the printing object 120 has a printing area corresponding to the pattern of the screen printing plate 50, and since the distance of each transportation of the transporting platform 30 is equal, the printing object 120 should be adjusted in advance at the positioning mechanism 70, so that the printing area can accurately correspond to the pattern of the screen printing plate 50.
In terms of distance, the positioning mechanism 70 includes a positioning table, two positioning protruding strips mounted on the positioning table, and two movable adjusting members; the two positioning convex strips are adjacent and perpendicular to each other so as to respectively correspond to two adjacent side edges of the printed material 120; one adjusting piece can move towards the direction close to or far away from one positioning convex strip, the other adjusting piece can move towards the direction close to or far away from the other positioning convex strip, and the two positioning convex strips and the two adjusting pieces are enclosed to form a positioning area.
After the printing stock 120 is moved to the positioning area, the two adjusting members push the printing stock 120 to enable the two side edges of the printing stock 120 to abut against the two positioning convex strips, so that the positioning adjustment of the printing stock 120 is realized, the printing area can still accurately correspond to the pattern of the screen printing plate 50 after being moved by a preset distance, and therefore, the error of the printing position 32 of the printing stock 120 can be avoided, and the printing quality is improved.
The first material conveying stroke and the second material conveying stroke can be completed by the same material conveying arm of the material conveying mechanism 40 or can be completed by the separation of different material conveying arms. For example, the material transfer mechanism 40 has only one material transfer arm, and the material transfer arm needs to wait for the positioning completion after moving the printed material 120 from the feeding mechanism 20 to the positioning mechanism 70, then move the printed material 120 from the positioning mechanism 70 to the feeding position 31, and finally return to the feeding mechanism 20 to take the material again.
In practical application, as shown in fig. 4, the material conveying mechanism 40 includes a transferring module 41 and a first material conveying arm 42 and a second material conveying arm 43 mounted on the transferring module 41, the first material conveying arm 42 and the second material conveying arm 43 are arranged at intervals along a material conveying direction, and the transferring module 41 is configured to synchronously drive the first material conveying arm 42 and the second material conveying arm 43, so that the first material conveying arm 42 moves between the feeding mechanism 20 and the positioning mechanism 70, and the second material conveying arm 43 moves between the positioning mechanism 70 and the material feeding position 31.
The spacing between the first transfer arm 42 and the second transfer arm 43 is consistent with the spacing between the positioning mechanism 70 and the loading mechanism 20, and the spacing between the positioning mechanism 70 and the feed location 31. That is, when the first transferring arm 42 moves to the feeding mechanism 20, the second transferring arm 43 is just located at the positioning mechanism 70; when the first transfer arm 42 moves to the positioning mechanism 70, the second transfer arm 43 is located at the feeding position 31.
Thus, while the first transfer arm 42 is retrieving material from the loading mechanism 20, the second transfer arm 43 may retrieve material from the positioning mechanism 70; while the first transfer arm 42 is placing the substrate 120 in the positioning mechanism 70, the second transfer arm 43 may place the substrate 120 at the feed position 31; while the first transfer arm 42 returns from the positioning mechanism 70 to the loading mechanism 20, the second transfer arm 43 may simultaneously return from the feed position 31 to the positioning mechanism 70. Therefore, during the positioning process, the first material conveying arm 42 and the second material conveying arm 43 do not need to stay on the same place to wait, but can be in a return stroke, so that the waiting time of the material conveying mechanism 40 can be reduced, the working efficiency of the material conveying mechanism 40 can be improved, and the overall printing efficiency of the screen printing machine can be further improved.
In one embodiment, as shown in fig. 1 and 7, the screen printing machine further comprises a transfer platform 80, the feeding mechanism 20 is located at a transfer end of the transfer platform 80 for placing the substrate 120 from the transfer platform 80, and the transfer platform 80 has a standby loading level 81 for placing at least one group of the standby substrates 120.
It should be noted that the feeding mechanism 20 places a stack of the substrates 120, and the feeding mechanism 40 removes one substrate 120 at the top of the stack of the substrates 120 at a time. The standby feeding level 81 is used for placing another group or groups of printed material stacks 120, after the printed materials 120 of the feeding mechanism 20 are taken out, the conveying platform 80 conveys the printed material stacks 120 of the standby feeding level 81 to the feeding mechanism 20, so that the printed materials 120 do not need to be manually added after the printed materials 120 of the feeding mechanism 20 are used up, the material supplementing process of the screen printing machine is simpler and more convenient, and the automation of material supplementing is realized.
Specifically, as shown in fig. 8, the feeding mechanism 20 includes a lifting device 21 and an unloading platform 22 mounted on the lifting device 21, and the unloading platform 22 can be lifted and lowered with the lifting device 21 to transfer the printing material 120 to the material taking height of the material conveying mechanism 40.
The material conveying mechanism 40 has a material taking reference surface, the material placing table 22 is located below the material taking reference surface, and the material placing table 22 can be lifted to be close to or far away from the material taking reference surface. The printing materials 120 placed on the discharging table 22 are stacked, and when the stack of the printing materials 120 is just placed on the discharging table 22, the stacking height is higher, and at this time, the discharging table 22 can be far away from the material taking reference surface of the material conveying mechanism 40, so that the printing materials 120 on the uppermost layer are just positioned on the material taking reference surface. As the printing process progresses, the top substrate 120 is gradually removed and the stack height of the substrate 120 is gradually reduced, so the feeding table 22 also needs to be gradually raised to keep the topmost substrate 120 on the material removal datum.
In connection with the above-described embodiment of the transfer platform 80, the transfer platform 80 may include two spaced-apart conveyor belts forming a lifting aisle therebetween, the end of the lifting aisle being configured to allow the discharge table 22 to pass therethrough. The printed material 120 on the standby discharging position is overlapped on the two conveyor belts, when the printed material 120 on the standby discharging position needs to be conveyed to the discharging table 22, the discharging table 22 can be descended to enable the placing surface to be flush with the top surface of the conveyor belts, the standby printed material 120 can be transferred to the tail end of the conveyor belts from the standby discharging position and placed on the discharging table 22, and therefore the transfer of the printed material 120 from the transfer platform 80 to the feeding mechanism 20 is achieved.
In practice, the feeding mechanism 20 further includes an optical fiber sensor (not shown) for detecting the height of the substrate 120 stacked on the feeding table 22. The optical line sensor is used to detect the stacking height of the substrate 120, and the height is referred to as an absolute height or a distance from a material-taking reference surface. For example, the detection light of the optical fiber sensor may be located at the material taking reference surface, i.e., detect whether there is the printing material 120 at the material taking reference surface.
The feeding mechanism 20 further includes a controller, the controller is electrically connected to the optical fiber sensor and the lifting device 21, if the optical fiber sensor detects that there is no printing material 120 at the material taking reference surface, which indicates that the topmost printing material 120 has been taken away, the controller controls the lifting device 21 to ascend by a preset height, so that the next topmost printing material 120 is lifted to the material taking reference surface, and the material can be continuously taken by the material conveying mechanism 40. From this, the automatic feeding of feed mechanism 20 can be realized to improve screen printing machine's work efficiency.
In an embodiment, as shown in fig. 1 to 3, the screen printing machine further includes a blanking mechanism 90 movably mounted on the frame 10, the blanking mechanism 90 is located above the discharging position 33, and a moving track of the blanking mechanism 90 extends from above the discharging position 33 to an end portion protruding from the conveying platform 30 along a transverse direction.
The blanking mechanism 90 is used for transferring the printed substrate 120 with the printed pattern from the discharging position 33 to a subsequent processing line, so that the printed substrate 120 can be automatically transferred between different processing lines, and the processing efficiency of the printed substrate 120 can be further improved.
Specifically, as shown in fig. 5 and 6, the conveying platform 30 includes a conveying belt 34, and the conveying belt 34 is provided with air holes 341; the screen printing machine further comprises a negative pressure device, the negative pressure device is provided with a negative pressure cavity 35 used for generating adsorption force, and the negative pressure cavity 35 is located below the conveying belt 34 and communicated with the air holes 341 so as to adsorb and fix the printing stock 120 placed on the conveying belt 34.
The negative pressure device can be installed on the frame 10 and located below the working platform 11, and the negative pressure chamber 35 can extend along the length direction of the conveyor belt 34, or can be arranged at intervals along the length direction of the conveyor belt 34, which is not limited herein. The airing holes 341 are arranged in the length direction and the width direction of the conveyor belt 34. The negative pressure cavity 35 can generate an adsorption force on the printing stock 120 placed on the conveyer belt 34, so that the printing stock 120 can be close to the conveyer belt 34 in the process of being transferred, and the phenomenon that the printing stock cannot move synchronously with the conveyer belt 34 due to slipping or inertia is avoided. This improves the stability of the transfer of the printing material 120 to the transport belt 34.
In one embodiment, the screen printing machine further includes an encoder (not shown) mounted to the frame 10, and the encoder is configured to monitor a transport displacement of the transport platform 30 at each transport stroke.
The transport platform 30 needs to transport a predetermined displacement for each transport stroke in order to transport the printing material 120 accurately from the feed position 31 to the printing position 32 and from the printing position 32 to the discharge position 33. If the transport path is too small or too large, this will lead to an incorrect position of the printed position 32 of the printing material 120. The encoder can convert the displacement model of the conveying platform 30 into an electric signal and then transmit the electric signal to the controller. If the conveying displacement of the conveying platform 30 in a certain conveying stroke is different from the preset displacement, the controller can inform a user in time or automatically adjust according to actual conditions so as to reduce the error printing condition of the screen printing machine.
In one embodiment, as shown in fig. 9, the screen printing machine further includes a lifting module 100 and a traverse module 110, the lifting module 100 is mounted to the frame 10, and the screen plate 50 and the traverse module 110 are mounted to the lifting module 100 to be lifted up and down with the lifting module 100;
the traverse module 110 has a moving arm 111, and the moving arm 111 is located above the screen plate 50; the scraper blades include an inking scraper blade 61 and a scraping scraper blade 62, and the inking scraper blade 61 and the scraping scraper blade 62 are connected to the moving arm 111 in a lifting manner so as to be alternatively abutted against the screen printing plate 50.
The screen plate 50 and the traverse module 110 are lifted synchronously with the lifting module 100, and thus the inking blade 61 and the wiping blade 62 connected to the traverse module 110 are also lifted synchronously with the lifting module 100, so that the screen plate 50, the inking blade 61 and the wiping blade 62 are kept relatively fixed in the longitudinal direction during the lifting of the lifting module 100, so that the inking blade 61 and the wiping blade 62 are kept on the top surface of the screen plate 50.
The inking blade 61 and the scraping blade 62 are reciprocated by the moving arm 111 in the longitudinal direction of the screen plate 50, and the inking blade 61 and the scraping blade 62 are alternately brought into contact with the screen plate 50 in one reciprocating stroke of the moving arm 111. The inking blade 61 is used for applying ink to the screen plate 50 and the pressed substrate 120, and the scraping blade 62 is used for evenly smearing the applied ink.
For example, the screen plate 50 has a first side and a second side opposite to each other, and after the screen plate 50 is pressed on the printing material 120, the moving arm 111 moves from the first side to the second side and returns from the second side to the first side. When the moving arm 111 moves to the first side, the ink application blade 61 descends to abut against the screen plate 50, and applies ink to the screen plate 50 and the printing material 120 as the moving arm 111 moves. After the moving arm 111 reaches the second side edge, the inking blade 61 is raised, and the squeegee blade 62 is lowered into abutment with the screen plate 50; as the moving arm 111 returns toward the first side, the squeegee 62 wipes the ink applied to the screen plate 50, thereby leveling the ink. By smearing the ink twice, the printing uniformity of the ink on the printing stock 120 can be improved, so that the printing quality is improved; and the double application of ink does not increase the round trip of the moving arm 111. Therefore, the printing efficiency is ensured, and the printing quality is improved.
The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A screen printing machine, comprising:
a frame having a worktop;
the feeding mechanism is arranged on the frame and used for placing a printing stock;
the conveying platform is arranged on the working table surface and is provided with a feeding position, a printing position and a discharging position which are sequentially arranged at intervals along the length direction of the conveying platform, and the feeding position is positioned at one end, close to the feeding mechanism, of the conveying platform;
the material conveying mechanism is movably arranged on the rack so as to move between the feeding mechanism and the feeding position, and is used for moving the printing stock from the feeding mechanism to the feeding position
The screen printing plate is arranged on the machine frame in a lifting mode and is positioned above the printing position so as to be close to or far away from the printing position along the longitudinal direction;
and the scraping plate is movably arranged on the rack and positioned on the top surface of the screen printing plate, and can move along the length direction of the conveying platform so as to press and scrape ink.
2. The screen printing machine of claim 1, further comprising a positioning mechanism mounted to the table, the positioning mechanism being disposed between the transport platform and the feeding mechanism, the positioning mechanism being configured to adjust the position of the substrate;
the material conveying mechanism is provided with a first material conveying stroke for moving the printing stock from the feeding mechanism to the positioning mechanism and a second material conveying stroke for moving the printing stock from the positioning mechanism to the material feeding position.
3. The screen printing machine of claim 2, wherein the material transfer mechanism includes a transfer module and first and second material transfer arms mounted to the transfer module, the first and second material transfer arms being spaced apart in a material transfer direction, the transfer module being configured to synchronously drive the first and second material transfer arms such that the first material transfer arm is movable between the loading mechanism and the positioning mechanism and the second material transfer arm is movable between the positioning mechanism and the material feeding position.
4. The screen printing machine of any of claims 1 to 3, further comprising a transport platform, the feed mechanism being located at a transport end of the transport platform for placement of substrates from the transport platform, the transport platform having a standby feed position for placement of at least one group of standby substrates.
5. The screen printing machine of any of claims 1 to 3, wherein the feed mechanism comprises a lifting device and an infeed table mounted to the lifting device, the infeed table being liftable with the lifting device to deliver the substrate to the infeed height of the transfer mechanism.
6. The screen printing machine of any of claims 1 to 3, further comprising a blanking mechanism movably mounted to the frame, the blanking mechanism being located above the discharge position, a path of movement of the blanking mechanism extending laterally from above the discharge position to an end protruding beyond the conveyor platform.
7. The screen printing machine of any of claims 1 to 3, wherein the conveying platform comprises a conveyor belt, the conveyor belt being provided with air holes; the screen printing machine further comprises a negative pressure device, the negative pressure device is provided with a negative pressure cavity used for generating adsorption force, and the negative pressure cavity is located below the conveying belt and communicated with the air holes so as to adsorb and fix the printing stock placed on the conveying belt.
8. The screen printing machine of any of claims 1 to 3, further comprising an encoder mounted to the frame for monitoring the transport displacement of the transport platform on each transport stroke.
9. The screen printing machine of claim 5, wherein the feed mechanism further comprises an optical fiber sensor to detect a height of the substrate stacked on the feed table.
10. The screen printing machine of any of claims 1 to 3, further comprising a lift module and a traverse module, the lift module being mounted to the frame, the screen printing plate and traverse module being mounted to the lift module to be raised and lowered with the lift module;
the traversing module is provided with a moving arm which is positioned above the screen printing plate; the scraper blade includes scribble black scraper blade and scraping ink scraper blade, scribble black scraper blade and scraping ink scraper blade liftable connect in the removal arm to in turn butt joint in the screen printing plate.
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| CN202111340400.3A CN114179497A (en) | 2021-11-12 | 2021-11-12 | Screen printing machine |
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