CN113276539A

CN113276539A - Screen printing machine based on CCD counterpoint

Info

Publication number: CN113276539A
Application number: CN202110492623.5A
Authority: CN
Inventors: 谢武俊
Original assignee: Shenzhen Lingchuang Precision Machinery Co ltd
Current assignee: Shenzhen Lingchuang Precision Machinery Co ltd
Priority date: 2021-05-06
Filing date: 2021-05-06
Publication date: 2021-08-20

Abstract

The invention discloses a screen printer based on CCD (charge coupled device) alignment, which comprises a frame, a printing platform, a clamping mechanism, a feeding mechanism, a CCD scanning device and a control system, wherein the printing platform is arranged on the frame; the printing platform is movably arranged on the rack and provided with a printing station, and a jig is placed in the printing platform in advance at a position corresponding to the printing station; the clamping mechanism is arranged on the frame and can move up and down relative to the printing platform, and is used for clamping the screen frame above the printing platform; the feeding mechanism is movably switched from a first position to the printing station and is arranged on the machine frame so as to move the printing stock from the first position to the printing station; the CCD scanning device is arranged on the frame; and the control system is respectively and electrically connected with the printing platform, the clamping mechanism, the feeding mechanism and the CCD scanning device. The technical scheme of the invention can improve the printing precision of the screen printer based on CCD contraposition.

Description

Screen printing machine based on CCD counterpoint

Technical Field

The invention relates to the technical field of screen printing machinery, in particular to a screen printing machine based on CCD (charge coupled device) alignment.

Background

A screen printer is a printing device which scrapes ink on a screen to a product through a scraper, and is widely applied to pattern printing of electronics, hardware, glass and plastic.

There are multiple screen printing machines in the existing market, but generally the printing precision is not high, especially when having the stock of special construction to circuit board etc. and print, can't fix a position circuit board and screen accuracy, leads to the printing precision low, and the printing effect is poor.

Disclosure of Invention

The invention mainly aims to provide a screen printer based on CCD (charge coupled device) alignment, aiming at improving the printing precision of the screen printer based on CCD alignment.

In order to achieve the above object, the present invention provides a screen printer based on CCD alignment, comprising:

a frame;

the printing platform is movably arranged on the rack and provided with a printing station, and a jig is placed in the printing platform in advance at a position corresponding to the printing station;

the clamping mechanism is arranged on the frame and can move up and down relative to the printing platform, and is used for clamping the screen frame above the printing platform;

the feeding mechanism is movably switched from a first position to the printing station and arranged on the machine frame so as to move the printing stock from the first position to the printing station;

the CCD scanning device is arranged on the frame; and

the control system is electrically connected with the printing platform, the clamping mechanism, the feeding mechanism and the CCD scanning device respectively;

the control system is used for controlling the CCD scanning device to detect the alignment points of the printing stock conveyed by the feeding mechanism when the feeding mechanism moves the printing stock at the first position to the printing station, and controlling the printing platform to move according to the detected alignment points of the printing stock so as to align the alignment points of the jig on the printing platform with the alignment points of the printing stock;

the control system is further used for controlling the feeding mechanism to place the printing stock on the jig after the jig is aligned with the printing stock, controlling the CCD scanning device to detect the alignment points of the screen frame clamped by the clamping mechanism, and controlling the printing platform to move according to the detected alignment points of the screen frame, so that the alignment points of the printing stock are aligned with the alignment points of the screen frame.

Optionally, a convex portion is convexly formed on the surface of the printing stock, the jig is correspondingly provided with a positioning groove, and when the feeding mechanism places the printing stock on the jig, the convex portion is inserted into the positioning groove.

Optionally, the printing platform comprises:

the printing bedplate is used for bearing the jig; and

and the two-axis moving mechanism is arranged on the rack, is in driving connection with the printing bedplate and is used for driving the printing bedplate to move in the horizontal direction.

Optionally, the two-axis moving mechanism includes:

the printing table plate is arranged on the first moving assembly, and the first moving assembly can drive the printing table plate to move along the X-axis direction; and

the first moving assembly is arranged on the second moving assembly, and the second moving assembly can drive the first moving assembly to move along the Y-axis direction.

Optionally, the feeding mechanism includes:

the sucker assembly is used for sucking the printing stock at the first position;

and the driving device is arranged on the rack, is in driving connection with the sucker component, and is used for driving the sucker component to move to the printing station from the first position and driving the sucker component to rotate around an axis.

Optionally, the drive device comprises:

the third moving assembly is used for driving the sucker assembly to move along the X-axis direction;

the fourth moving assembly is used for driving the sucker assembly to move along the Z-axis direction; and

the first rotating assembly is used for driving the sucker assembly to rotate around the Z axis.

Optionally, the suction disc assembly is mounted on the first rotating assembly, and the first rotating assembly drives the suction disc assembly to rotate along the Z axis;

the first rotating assembly is arranged on the fourth moving assembly, and the fourth moving assembly drives the first rotating assembly to move up and down along the Z axis;

the fourth moving assembly is mounted on the third moving assembly, and the third moving assembly drives the fourth moving assembly to move back and forth along the X axis.

Optionally, the screen printing machine based on CCD alignment further includes a lifting device, the lifting device is mounted on the frame in the vertical direction, the clamping mechanism is mounted on the lifting device, and the lifting device is configured to drive the clamping mechanism to perform lifting switching between an avoiding position and a working position;

when the clamping mechanism is located at the avoiding position, the clamping mechanism is located above the printing platform so as to reserve an avoiding space for the feeding mechanism to move the printing stock from the first position to the printing station; when the clamping mechanism is switched to the working position, the lifting device descends to the position where the screen frame clamped by the clamping mechanism is close to the printing stock.

Optionally, the clamping mechanism comprises:

the two clamping arms are oppositely arranged, and the screen frame is clamped between the two clamping arms; and

and the adjusting assembly is in driving connection with the two clamping arms and is used for driving the two clamping arms to move towards or away from each other.

Optionally, the CCD scanning device comprises:

a CCD camera; and

the transverse moving assembly is arranged on the rack, the CCD camera is arranged on the transverse moving assembly, and the transverse moving assembly is used for driving the CCD camera to move along the X-axis direction so as to scan the printing stock and the screen frame.

According to the technical scheme, the alignment points of the printing stock and the screen frame are detected through the CCD scanning device, the printing platform is controlled to move to the corresponding positions through the control system according to the detected alignment points, so that the alignment points of the jig and the printing stock are aligned, the alignment points of the printing stock and the screen frame are aligned, the printing stock is accurately positioned on the jig, the printing stock and the pattern of the screen frame accurately correspond, and the printing accuracy of the screen printing machine based on CCD alignment is 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 a screen printer based on CCD alignment according to an embodiment of the present invention;

FIG. 2 is a schematic view of another angle of the CCD-based alignment screen printing machine of FIG. 1;

FIG. 3 is an enlarged view taken at I in FIG. 1;

FIG. 4 is a schematic structural diagram of a feeding mechanism of the screen printing machine based on CCD alignment in FIG. 1;

fig. 5 is a schematic diagram of alignment of the printing material, the jig, and the frame according to the present invention.

The reference numbers illustrate:

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.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are 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, 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 invention provides a screen printer based on CCD (charge coupled device) alignment, which is particularly suitable for screen printing of a circuit board.

Referring to fig. 1 to 3, fig. 1 is a schematic structural diagram of an embodiment of a screen printer based on CCD alignment according to the present invention; FIG. 2 is a schematic view of another angle of the CCD-based alignment screen printing machine of FIG. 1; fig. 3 is an enlarged view of the point i in fig. 1.

In the embodiment of the present invention, the screen printer 10 based on CCD alignment includes a frame 100, a printing platform 200, a clamping mechanism 300, a feeding mechanism 400, a CCD scanning device (not shown), and a control system, wherein the control system is electrically connected to the printing platform 200, the clamping mechanism 300, the feeding mechanism 400, and the CCD scanning device, respectively; as shown in fig. 1, the printing platform 200 is mounted on the frame 100, the printing platform 200 has a printing station, the printing station is used for aligning and printing by the CCD-based screen printer 10, a jig 30 is pre-placed on the printing platform 200 at a position corresponding to the printing station, and the jig 30 is used for positioning and supporting the printing material 20. The clamping mechanism 300 is disposed on the frame 100 and capable of moving up and down relative to the printing platform 200, and before the printing operation, the clamping mechanism 300 is used for clamping the screen frame 40 above the printing platform 200. The feeding mechanism 400 is movably switched from the first position to the printing station and is disposed on the frame 100 to move the printing material 20 from the first position to the printing station, and it is understood that the first position may be a position on the frame 100 of the screen printing machine 10 for temporarily storing the printing material 20 based on CCD alignment, or may be a position on other devices dedicated to storing the printing material 20. A CCD scanner is mounted to the frame 100 and is used to scan the object 20 and the frame 40. Of course, the CCD alignment based screen printing machine 10 further includes a scraper assembly 500, and the scraper assembly 500 is used for scraping ink on the screen of the frame 40 onto the printing material 20.

In the screen printing machine 10 based on CCD alignment, before the printing operation, the jig 30, the printing material 20, and the frame 40 are aligned in sequence, and it can be understood that, in order to facilitate alignment, the jig 30, the printing material 20, and the frame 40 are preset with corresponding alignment points in the production process. In the alignment process, under the control of the control system, the feeding mechanism 400 moves the printed material 20 at the first position to the printing station, at this time, the CCD scanning device scans the printed material 20 carried by the feeding mechanism 400 to detect the alignment point of the printed material 20 and feeds back the alignment point to the control system, and the control system controls the printing platform 200 to move according to the detected alignment point of the printed material 20, so that the alignment point of the jig 30 on the printing platform 200 is aligned with the alignment point of the printed material 20; after the object 20 is aligned with the jig 30, the feeding mechanism 400 places the object 20 on the jig 30, at this time, the CCD scanning device scans the frame 40 clamped by the clamping mechanism 300 to detect the alignment point of the frame 40, and feeds back the alignment point to the control system, the control system controls the printing platform 200 to move according to the detected alignment point of the frame 40, so that the alignment point of the object 20 is aligned with the alignment point of the frame 40, after the object 20 is aligned with the frame 40, the clamping mechanism 300 descends and moves until the frame 40 clamped by the clamping mechanism is close to the object 20, and at this time, the printing operation can be performed. Therefore, the jig 30 and the printed material 20 are aligned in sequence, and the printed material 20 and the screen frame 40 are aligned in sequence, so that the printed material 20 is accurately placed on the jig 30, and the patterns of the printed material 20 and the screen frame 40 are accurately corresponding.

According to the technical scheme, the alignment points of the printing stock 20 and the screen frame 40 are detected through the CCD scanning device, the printing platform 200 is controlled to move to the corresponding positions through the control system according to the detected alignment points, so that the alignment points of the jig 30 and the printing stock 20 are aligned, the alignment points of the printing stock 20 and the screen frame 40 are aligned, the printing stock 20 is accurately positioned on the jig 30, the patterns of the printing stock 20 and the screen frame 40 are accurately corresponding, and the printing accuracy of the screen printer 10 based on CCD alignment is improved.

As can be understood, referring to fig. 5, in order to position the printing material 20, in an embodiment of the present invention, a convex portion is formed on the surface of the printing material 20, and the jig 30 is correspondingly provided with a positioning groove, and it can be understood that when the alignment point of the printing material 20 is aligned with the alignment point of the jig 30, the convex portion of the printing material 20 corresponds to the positioning groove of the jig 30. In this way, after the jig 30 is aligned with the printing material 20, when the feeding mechanism 400 places the printing material 20 on the jig 30, the convex portion of the printing material 20 is inserted into the positioning groove of the jig 30.

Further, in one embodiment, the printing platform 200 includes a printing platen 210 and a two-axis moving mechanism 220, as shown in fig. 1, the printing platen 210 is used to carry the jig 30 while providing a table for printing operation. The two-axis moving mechanism 220 is mounted on the frame 100 and is drivingly connected to the printing platen 210, and is configured to drive the printing platen 210 to move in the horizontal direction, so as to align the alignment point of the jig 30 on the printing platen 210 with the alignment point of the object to be printed 20, or to align the alignment point of the object to be printed 20 carried by the jig 30 on the printing platen 210 with the alignment point of the frame 40.

Further, in one embodiment, the two-axis moving mechanism 220 includes a first moving component (not shown) and a second moving component (not shown); the printing platen 210 is mounted on a first moving component, the first moving component can drive the printing platen 210 to move along the X-axis direction, the first moving component is mounted on a second moving component, the second moving component is used for driving the first moving component to move along the Y-axis direction, and through the matching of the first moving component and the second moving component, the printing platen 210 can move along the X-axis direction and the Y-axis direction in the horizontal plane. Referring to the drawings, X-axis and Y-axis directions are directions of a coordinate system shown in the drawing, the X-axis direction is a direction in which the doctor assembly 500 scrapes ink, and the Y-axis direction is orthogonal to the X-axis direction in a horizontal plane. It is understood that, in the present embodiment, in order to enhance the stability during the movement of the printing platen 210, two sets of the first moving assembly and the second moving assembly are provided, and the two sets of the first moving assembly and the two sets of the second moving assembly are synchronously movable by the control of the control system.

Further, in an embodiment, referring to fig. 1 and 4, the feeding mechanism 400 includes a suction cup assembly 410 and a driving device 420, the suction cup assembly 410 is used for sucking the substrate 20 at the first position, and it can be understood that compared with the method of clamping the substrate 20 by using a clamp, the method of sucking by using air pressure can prevent the substrate 20 from deforming, and avoid affecting the printing precision. The driving device 420 is mounted on the frame 100 and is in driving connection with the suction cup assembly 410, and the driving device 420 is used for driving the suction cup assembly 410 to move from the first position to the printing station, so that the CCD scanning device can scan the object 20 sucked by the suction cup assembly 410 at the printing station; in addition, the driving device 420 can drive the sucker assembly 410 to rotate around an axis so as to adjust the posture of the printing material 20 sucked by the sucker assembly 410.

Further, in an embodiment, referring to fig. 4, the driving device 420 includes a third moving assembly, a fourth moving assembly, and a first rotating assembly; the third moving assembly is used for driving the sucker assembly 410 to move along the X-axis direction, and the fourth moving assembly is used for driving the sucker assembly 410 to move along the Z-axis direction, so that the printing stock 20 can be moved to the printing station from the first position through the movement in two directions. The first rotation assembly is used to drive the chuck assembly 410 to rotate about the Z-axis. Of course, in other embodiments, the driving device 420 may also be provided with a fifth transmission assembly for driving the chuck assembly 410 to move along the Y-axis direction, and in this embodiment, the movement in the X-axis and Z-axis directions can meet the use requirement, and only the movement in the X-axis and Z-axis directions is provided for simplifying the control procedure.

Referring to FIG. 4, the chuck assembly 410 is mounted to a first rotating assembly, which rotates the chuck assembly 410 along the Z-axis. The first rotating assembly is installed on the fourth moving assembly, and the fourth moving assembly drives the first rotating assembly to move up and down along the Z axis. The fourth moving assembly is arranged on the third moving assembly, and the third moving assembly drives the fourth moving assembly to move back and forth along the X axis.

Specifically, referring to fig. 4, in this embodiment, the third moving assembly includes a linear module 421 and a mounting frame 422, the mounting frame 422 is installed on the linear module 421, the fourth moving assembly is installed on the mounting frame 422, and the linear module 421 drives the mounting frame 422 to move so as to drive the fourth moving assembly to move back and forth along the X-axis direction. The fourth removes the subassembly and includes slip table cylinder 423 and mounting panel 424, and mounting panel 424 installs in slip table cylinder 423, and first rotating assembly installs in mounting panel 424, and slip table cylinder 423 drive mounting panel removes and then drives first rotating assembly along Z axle direction lift movement. The first rotary assembly includes a rotary cylinder 425, the suction cup assembly 410 is mounted to the rotary cylinder 425, and the rotary cylinder 425 drives the suction cup assembly 410 to rotate about the Z-axis.

Further, in an embodiment, referring to fig. 1, the screen printing machine 10 based on CCD alignment further includes a lifting device 600, the lifting device 600 is mounted on the frame 100 along a vertical direction, the clamping mechanism 300 is mounted on the lifting device 600, and the lifting device 600 is configured to drive the clamping mechanism 300 to be switched between the avoiding position and the working position. When the clamping mechanism 300 is in the avoiding position, the clamping mechanism 300 is located above the printing platform 200 to leave an avoiding space for the feeding mechanism 400 to move the printing stock 20 from the first position to the printing station; when the clamping mechanism 300 is switched to the working position, the lifting device 600 descends until the screen frame 40 clamped by the clamping mechanism 300 is close to the printing object 20 so as to perform printing operation. The lifting device 600 may be a screw-sliding rail mechanism, a rack-and-pinion mechanism, or a belt conveying mechanism.

Further, referring to fig. 3, the clamping mechanism 300 includes two clamping arms 310 and an adjusting assembly 320, the two clamping arms 310 are disposed opposite to each other, and the screen frame 40 is clamped between the two clamping arms 310; the adjusting assembly 320 is in driving connection with the two holding arms 310, and the adjusting assembly 320 is used for driving the two holding arms 310 to move towards or away from each other so as to adjust the distance between the two holding arms 310, thereby being capable of adapting to the net frames 40 with different sizes.

Specifically, in this embodiment, the adjusting assembly 320 includes a mounting base (not marked), the mounting base activity is located on the lifting device 600, two lead screw slide rail sets (including the lead screw, slider and slide rail) are installed to the mounting base, still install driving motor (not marked) on the mounting base, driving motor passes through the driving medium and is connected with two lead screw slide rail set drives, two centre gripping arms 310 are connected with a pair of transmission of two lead screw slide rail sets, in adjustment process, two lead screws of driving motor drive are respectively rotated with opposite direction of rotation, thereby drive two centre gripping arms 310 and move along opposite directions or back on the back.

It will be appreciated that in one embodiment, the CCD scanning device comprises a CCD camera and a traversing assembly; the traverse assembly is mounted on the frame 100, and the CCD camera is mounted on the traverse assembly, and the traverse assembly is used to drive the CCD camera to move along the X-axis direction so as to scan the printing material 20 sucked by the sucker assembly 410 and the screen frame 40 clamped by the clamping mechanism 300.

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

1. The screen printing machine based on CCD is counterpointed, its characterized in that, screen printing machine based on CCD is counterpointed includes:

a frame;

the CCD scanning device is arranged on the frame; and

2. The screen printing machine based on CCD alignment of claim 1, wherein the surface of the printing material is convexly formed with a protrusion, the jig is correspondingly provided with a positioning groove, and the protrusion is inserted into the positioning groove when the feeding mechanism places the printing material on the jig.

3. The CCD-alignment-based screen printer of claim 1, wherein the printing platform comprises:

the printing bedplate is used for bearing the jig; and

4. The CCD-alignment-based screen printer according to claim 3, wherein the two-axis moving mechanism includes:

5. The CCD-alignment-based screen printer according to claim 1, wherein the feed mechanism includes:

6. The CCD-alignment-based screen printer according to claim 5, wherein the driving means includes:

7. The CCD-based alignment screen printing machine of claim 6, wherein the suction cup assembly is mounted to the first rotating assembly, and the first rotating assembly drives the suction cup assembly to rotate along the Z axis;

8. The CCD alignment-based screen printing machine according to claim 1, further comprising a lifting device, the lifting device being vertically mounted on the frame, the clamping mechanism being mounted on the lifting device, the lifting device being configured to drive the clamping mechanism to be switched between the avoiding position and the working position;

9. The CCD-alignment-based screen printing machine according to claim 1, wherein the clamping mechanism includes:

10. The CCD-alignment-based screen printer according to claim 1, wherein the CCD scanning device includes:

a CCD camera; and