A graphic automatic registration printing structure for screen printing machine

Abstract

The present invention discloses a screen printer graphic automatic alignment printing structure, comprising: a first base, a placement table, a CCD camera, a positioning mechanism, a vacuum adsorption mechanism, a second base, a screen, a third base, a knife seat, a printing scraper, a first servo motor drive mechanism, a second servo motor drive mechanism, a third servo motor drive mechanism, a fourth servo motor drive mechanism and a fifth servo motor drive mechanism. When in use, a ceramic substrate is placed on the placement table, and then the positioning structure is used for positioning, and the vacuum adsorption mechanism is used for adsorption and fixing, and the first servo motor drive mechanism drives the second base to move to the top of the ceramic substrate on the placement table, and the second servo motor drive mechanism, the third servo motor drive mechanism and the fourth servo motor drive mechanism respectively perform corresponding actions according to the data of the CCD camera, so that the screen-printed graphic on the screen is aligned with the ceramic substrate, which is convenient for batch printing and production. This structure can realize automatic alignment printing of ceramic substrates and is easy to use.

Description

Technical Field

[0001] The invention relates to the technical field of screen printing, in particular to an automatic alignment printing structure for graphics of a screen printer. Background Art

[0002] Ceramic substrate refers to a special process board in which copper foil is directly bonded to the surface (single or double sides) of alumina (Al2O3) or aluminum nitride (AlN) ceramic substrate at high temperature. The ultra-thin composite substrate has excellent electrical insulation performance, high thermal conductivity, excellent soft solderability and high adhesion strength, and can be etched with various patterns like PCB boards, and has a large current carrying capacity. Therefore, ceramic substrates have become the basic materials for high-power power electronic circuit structure technology and interconnection technology. At present, the common method for processing circuits on ceramic substrates is screen printing. In screen printing, in order to ensure accurate printing, the ceramic substrate needs to be aligned with the printed pattern on the screen. This alignment is often done manually, and the alignment efficiency and alignment accuracy are relatively low. Therefore, it is necessary to design a structure to replace manual operations. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a screen printing machine pattern automatic alignment printing structure.

[0004] The technical solution of the present invention is as follows: A screen printing machine pattern automatic alignment printing structure, characterized in that it includes: a first base, a placement table, a CCD camera, a positioning mechanism, a vacuum adsorption mechanism, a second base, a screen, a third base, a knife seat, a printing scraper, a first servo motor drive mechanism, a second servo motor drive mechanism, a third servo motor drive mechanism, a fourth servo motor drive mechanism and a fifth servo motor drive mechanism;

[0005] The first base is provided with the placement table, the placement table is suitable for placing the ceramic substrate, the CCD camera is installed on the first base, the positioning mechanism is provided on the first base, the positioning mechanism is used to position the ceramic substrate placed on the placement table, the vacuum adsorption mechanism is provided on the first base, the vacuum adsorption mechanism is used to adsorb and fix the ceramic substrate on the placement table;

[0006] The second base is provided with the screen, the screen is provided with a reference mark that can be recognized by the CCD camera, the first servo motor driving mechanism is connected to the second base, and the first servo motor driving mechanism is used to drive the second base to move so that the screen moves to above the placement table;

[0007] The third base is arranged on the second base, the second servo motor driving mechanism is arranged on the second base, and the second servo motor driving mechanism is connected to the third base to drive the third base to move along the X axis; the third servo motor driving mechanism is arranged on the second base, and the third servo motor driving mechanism is connected to the third base to drive the third base to move along the Y axis; the fourth servo motor driving mechanism is arranged on the second base, and the fourth servo motor driving mechanism is connected to the third base to drive the third base to rotate around the θ axis;

[0008] The knife seat is arranged on the third base, the fifth servo motor driving mechanism is arranged on the third base, the fifth servo motor driving mechanism is connected to the knife seat to drive the knife seat to move along the Y axis, and the printing scraper is arranged on the knife seat.

[0009] Preferably, the positioning mechanism includes a positioning wheel and a sixth servo motor drive mechanism, there are multiple positioning wheels, and the multiple positioning wheels are arranged along the circumference of the placement table. The positioning wheel is connected to the sixth servo motor drive mechanism, and the sixth servo motor drive mechanism is used to drive the positioning wheel to move toward or away from the center of the placement table.

[0010] Preferably, the placement table is provided with a plurality of air holes, and the vacuum adsorption mechanism is used to generate negative pressure in the air holes.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] The structure can realize automatic alignment printing of the ceramic substrate, improve alignment efficiency, and is easy to use.

[0013] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work:

[0015] Figure 1 It is a three-dimensional diagram of a partial structure of the present invention;

[0016] Figure 2 It is a three-dimensional diagram of a partial structure of the present invention;

[0017] Figure 3It is a three-dimensional view of the first base of the present invention.

[0018] The reference numerals are as follows:

[0019] 1. First base; 2. Placement table; 3. CCD camera; 4. Positioning mechanism; 5. Positioning wheel; 6. Vacuum adsorption mechanism; 7. Second base; 8. Silk screen; 9. Third base; 10. Knife holder; 11. Printing scraper; 12. Second servo motor drive mechanism; 13. Third servo motor drive mechanism; 14. Fourth servo motor drive mechanism; 15. Fifth servo motor drive mechanism. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. In the description of the present invention, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "vertical", "circumferential", "radial", "axial", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0022] In the description of the present invention, "first feature" and "second feature" may include one or more of the features. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0023] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] Please refer to the following drawings Figure 1-Figure 3 A screen printing machine graphic automatic alignment printing structure according to an embodiment of the present invention is described, comprising: a first base 1, a placement table 2, a CCD camera 3, a positioning mechanism 4, a vacuum adsorption mechanism 6, a second base 7, a screen 8, a third base 9, a knife holder 10, a printing scraper 11, a first servo motor drive mechanism, a second servo motor drive mechanism 12, a third servo motor drive mechanism 13, a fourth servo motor drive mechanism 14 and a fifth servo motor drive mechanism 15.

[0025] like Figure 3 As shown, a placing table 2 is provided on the first base 1, and the placing table 2 is suitable for placing a ceramic substrate. A CCD camera 3 is installed on the first base 1, and a positioning mechanism 4 is provided on the first base 1. The positioning mechanism 4 is used to position the ceramic substrate placed on the placing table 2. A vacuum adsorption mechanism 6 is provided on the first base 1, and the vacuum adsorption mechanism 6 is used to adsorb and fix the ceramic substrate on the placing table 2.

[0026] In actual use, the positioning mechanism 4 includes a positioning wheel 5 and a sixth servo motor drive mechanism, wherein the positioning wheel 5 is multiple, and the multiple positioning wheels 5 are arranged along the circumference of the placement table 2, and the positioning wheel 5 is connected to the sixth servo motor drive mechanism, and the sixth servo motor drive mechanism is used to drive the positioning wheel 5 to move in the direction close to or away from the center of the placement table 2, thereby realizing the positioning of the ceramic substrate. Specifically, there are 6 positioning wheels 5, one at each of the front and rear ends of the placement table 2, and two at each of the left and right ends, so that when the ceramic substrate is placed on the placement table 2, the sixth servo motor drive mechanism can drive the 6 positioning wheels 5 to clamp the ceramic substrate at the same time, thereby completing the positioning of the ceramic substrate, and this positioning form is simple and easy to realize. It can be understood that there are many structural forms of the sixth servo motor drive mechanism that can drive the positioning wheel 5 to move, which can be selected according to actual conditions, and is not limited here. For example, the sixth servo motor drive mechanism can be driven by a cylinder, and multiple cylinders are connected to multiple positioning wheels 5 one by one, respectively, and the movement of the positioning wheel 5 can be realized by extending and retracting the cylinder piston rod.

[0027] In practical applications, the placement table 2 is provided with a plurality of air holes, and the vacuum adsorption mechanism 6 is used to generate negative pressure in the air holes, so that when the ceramic is basically positioned, negative pressure is generated, thereby firmly fixing the ceramic substrate on the placement table 2. In order to generate negative pressure, the vacuum adsorption mechanism 6 also includes air pipes, air sources, valves and other components, which will not be described in detail.

[0028] like Figure 2 As shown, a screen 8 is provided on the second base 7, and a reference mark that can be recognized by the CCD camera 3 is provided on the screen 8. The first servo motor driving mechanism is connected to the second base 7, and the first servo motor driving mechanism is used to drive the second base 7 to move so that the screen 8 moves above the placement table 2. It can be understood that there are many structural forms of the first servo motor driving mechanism that can drive the second base 7 to move, which can be selected according to actual conditions and are not limited here. For example, the first servo motor driving mechanism can be a manipulator.

[0029] The second base 7 is arranged on the third base 9, the second servo motor driving mechanism 12 is arranged on the third base 9, and the second servo motor driving mechanism 12 is connected to the second base 7 to drive the second base 7 to move along the X-axis; the third servo motor driving mechanism 13 is arranged on the third base 9, and the third servo motor driving mechanism 13 is connected to the second base 7 to drive the second base 7 to move along the Y-axis; the fourth servo motor driving mechanism 14 is arranged on the third base 9, and the fourth servo motor driving mechanism 14 is connected to the second base 7 to drive the second base 7 to rotate around the θ-axis.

[0030] It is understandable that there are many structural forms of the second servo motor drive mechanism 12, the third servo motor drive mechanism 13 and the fourth servo motor drive mechanism 14 that can drive the second base 7 to move (including rotation and movement), which can be selected according to actual conditions and are not limited here. For example, the second servo motor drive mechanism 12 and the third servo motor drive mechanism 13 can be driven by a screw slider, the screw is arranged along the X-axis or the Y-axis, and the slider is connected to the second base 7, so that the rotation of the screw can drive the sliding movement to realize the movement of the second base 7 along the X-axis or the Y-axis; and the fourth servo motor drive mechanism 14 can be a motor, and the motor shaft is the θ-axis, so that when the motor shaft rotates, the rotation of the second base 7 can be realized.

[0031] Of course, in order to make the movement of the second base 7 more stable, a slide rail and slide groove mechanism in the corresponding direction may be provided for limiting. Those skilled in the art may configure it according to the specific situation and will not be described in detail.

[0032] The knife seat 10 is arranged on the third base 9, and the fifth servo motor driving mechanism 15 is arranged on the third base 9. The fifth servo motor driving mechanism 15 is connected to the knife seat 10 to drive the knife seat 10 to move along the Y axis. The knife seat 10 is provided with a printing scraper 11, and the printing scraper 11 is located above the screen 8. It can be understood that there are many structural forms of the fifth servo motor driving mechanism 15 that can drive the knife seat 10 to move, which can be selected according to actual conditions and are not limited here. For example, the fifth servo motor driving mechanism 15 can be driven by a screw rod and a slider, and the screw rod is arranged along the Y axis, and then the slider is connected to the knife seat 10, so that the rotation of the screw rod can drive the sliding movement to realize the movement of the knife seat 10 along the Y axis.

[0033] The working process of this structure is as follows: the ceramic substrate to be printed is placed on the placement table 2 on the first base 1, and then the positioning structure positions the ceramic substrate. After the positioning is completed, the vacuum adsorption mechanism 6 firmly adsorbs the ceramic substrate so that the ceramic substrate cannot move. Then, the first servo motor driving mechanism drives the second base 7 to move, so that the screen 8 on the second base 7 can move to the top of the ceramic substrate on the placement table 2. At this time, the CCD camera 3 can identify the reference mark on the screen 8, and then the fifth servo motor driving mechanism 15 drives the printing scraper 11 to move for the first printing. After the printing is completed, the CCD camera 3 takes pictures according to the printing results to check the printing offset and calculates it. Then, according to the calculated data, the second servo motor driving mechanism 12 (X axis: left and right), the third servo motor driving mechanism 13 (Y axis: front and back) and the fourth servo motor driving mechanism 14 (θ: rotation) respectively perform corresponding actions to finally make the silk-screen pattern on the screen 8 align with the ceramic substrate, which is convenient for subsequent batch printing production. This structure can realize automatic alignment printing of ceramic substrates and is easy to use.

[0034] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A screen printing machine pattern automatic alignment printing structure, characterized in that: include: A first base, a placement table, a CCD camera, a positioning mechanism, a vacuum adsorption mechanism, a second base, a screen, a third base, a knife holder, a printing scraper, a first servo motor drive mechanism, a second servo motor drive mechanism, a third servo motor drive mechanism, a fourth servo motor drive mechanism, and a fifth servo motor drive mechanism; The first base is provided with the placement table, the placement table is suitable for placing the ceramic substrate, the CCD camera is installed on the first base, the positioning mechanism is provided on the first base, the positioning mechanism is used to position the ceramic substrate placed on the placement table, the vacuum adsorption mechanism is provided on the first base, the vacuum adsorption mechanism is used to adsorb and fix the ceramic substrate on the placement table; The second base is arranged on the third base, the second base is provided with the screen, the screen is provided with a reference mark that can be recognized by the CCD camera, the first servo motor driving mechanism is connected to the second base, and the first servo motor driving mechanism is used to drive the second base to move so that the screen moves to the top of the placement table; The second servo motor driving mechanism is disposed on the third base, and the second servo motor driving mechanism is connected to the second base to drive the second base to move along the X-axis; The third servo motor driving mechanism is disposed on the third base, and the third servo motor driving mechanism is connected to the second base to drive the second base to move along the Y axis; the fourth servo motor driving mechanism is disposed on the third base, and the fourth servo motor driving mechanism is connected to the second base to drive the second base to rotate around the θ axis; The knife seat is arranged on the third base, the fifth servo motor driving mechanism is arranged on the third base, the fifth servo motor driving mechanism is connected to the knife seat to drive the knife seat to move along the Y axis, the knife seat is provided with the printing scraper, and the printing scraper is located above the screen; Wherein, the positioning mechanism includes a positioning wheel and a sixth servo motor driving mechanism, the positioning wheel is multiple, the multiple positioning wheels are arranged along the circumference of the placement table, the positioning wheel is connected to the sixth servo motor driving mechanism, and the sixth servo motor driving mechanism is used to drive the positioning wheel to move toward or away from the center of the placement table; The placement table is provided with a plurality of air holes, and the vacuum adsorption mechanism is used to generate negative pressure in the air holes.

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