CCD (Charge Coupled Device) positioning screen printing machine capable of quickly replacing screen plate

Abstract

The invention discloses a CCD (Charge Coupled Device) positioning screen printing machine capable of quickly changing a screen plate. The screen printing machine comprises a machine base, and a screen printing mechanism and a feeding mechanism are mounted on the upper side of the machine base; the screen printing mechanism comprises four height adjusting assemblies fixedly connected to the upper side of the machine base, the output ends of the four height adjusting assemblies are fixedly connected with the same mounting frame, an adjustable screen frame is fixedly connected into the mounting frame, and first electric push rods are fixedly connected to the four corners of the upper surface of the mounting frame correspondingly. The multiple first electric push rods are fixedly connected with a fixing frame, and the upper side of the fixing frame is fixedly connected with an electric lead screw nut adjusting module. The PCB to be printed is automatically and accurately positioned through the mark points shot by the CCD positioning camera, so that rapid and automatic positioning of the screen and the PCB can be completed, manual positioning by an operator is not needed, and the efficiency and convenience of replacing the screen of the screen printing machine are effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of screen printing machines, in particular to a CCD positioning fast screen changing screen printing machine. Background Art

[0002] PCBs, also known as printed circuit boards (PCBs), are important electronic components that support and connect electronic components. They are a crucial component of existing electronic devices. During the production process, PCBs require printing using a screen printer, a machine that prints text and images. The process works as follows: a printing plate with the text and image to be printed is mounted on a printing press. Ink is then applied manually or by a printer to the areas of the plate where the text and image are located. The ink is then transferred directly or indirectly to paper or other substrates (such as textiles, metal plates, plastics, leather, wood, glass, and ceramics), creating a duplicate print.

[0003] When using an existing PCB screen printer, it is necessary to move the PCB to be printed above the stencil so that the PCB to be printed is aligned with the mark points on the stencil. Only then can the PCB be accurately printed. Since the printing quality will deteriorate after the stencil is used for a long time, the stencil needs to be replaced in time. The stencil of the existing PCB screen printer needs to be aligned manually with the PCB to be printed, which requires re-alignment when the stencil is replaced. Since there are a large number of mark points on the stencil, the above alignment work is tedious and complicated, and the workload of the operator is large, which makes it less convenient to replace the stencil of the screen printer, and the efficiency of replacing the stencil of the screen printer is low. Summary of the Invention

[0004] The object of the present invention is to provide a CCD positioning fast screen changing screen printing machine to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] The present invention provides a CCD positioning fast screen-changing screen printing machine, comprising a machine base, wherein a screen printing mechanism and a feeding mechanism are installed on the upper side of the machine base;

[0007] The screen printing mechanism includes four height adjustment components fixedly connected to the upper side of the machine base, the output ends of the four height adjustment components are fixedly connected to the same mounting bracket, the interior of the mounting bracket is fixedly connected to an adjustable screen frame, the four corners of the upper surface of the mounting bracket are fixedly connected to a first electric push rod, a plurality of the first electric push rods are fixedly connected to a fixing bracket, the upper side of the fixing bracket is fixedly connected to an electric lead screw nut adjustment module, the electric lead screw nut adjustment module is installed on a sliding bracket, the lower side of the sliding bracket is symmetrically fixedly connected to two screen printing scrapers, the screen printing scrapers are located above the adjustable screen frame;

[0008] The feeding mechanism includes a casing fixedly connected to the upper side of the machine base, the side wall on the upper side of the machine base is fixedly connected to a translation drive module, the output end of the translation drive module is fixedly connected to a table, the side wall on the upper side of the table is fixedly connected to a CCD positioning camera, the upper side of the table is fixedly connected to a PCB board placement table, the lower side of the table is fixedly connected to two horizontal drive components, and both of the horizontal drive components are fixedly connected to a movable plate, a plurality of strip holes are opened on the upper side of the table, the movable plate passes through the table through the strip holes, and the upper side of the movable plate is fixedly connected to a pressure strip.

[0009] Among them, the stencil that needs to be replaced is taken out from the adjustable stencil frame, and the new stencil is placed in the adjustable stencil frame. The table is driven by the translation drive module to move to the bottom of the stencil, and the table drives the CCD positioning camera to move to the bottom of the stencil. The CCD positioning camera shoots the MARK points on the stencil, and the CCD positioning camera transmits the data to the screen printing mechanism. The PCB to be printed is placed on the PCB board placement table on the table and centered. The two pressure bars are driven by the horizontal drive component to limit and fix the PCB to be printed. The translation drive module drives the table to move to the bottom of the stencil, and the mark points shot by the CCD positioning camera are used to automatically and accurately position the PCB to be printed, thereby completing the fast and automatic positioning of the stencil and PCB board without the operator manually positioning, effectively improving the efficiency and convenience of replacing the stencil of the screen printing machine.

[0010] Furthermore, the housing includes four columns fixedly connected to the upper side of the base, and the upper ends of the four columns are fixedly connected to the same equipment box, and a control panel is installed on the equipment box.

[0011] Furthermore, the machine base includes a base, the interior of the base is a hollow structure, the opening of the base faces downward, and the side wall on the lower side of the base is fixedly connected to a plurality of feet.

[0012] Furthermore, a mounting block is fixedly connected to the side wall on the upper side of the fixed frame, two through holes are opened on the mounting block, and sliding rods are movably inserted in the through holes, both ends of the two sliding rods are fixedly connected to baffles, a guide rail rod is fixedly connected between the two baffles, and a controller is fixedly connected to the guide rail rod.

[0013] Furthermore, the height adjustment assembly includes a fixed plate fixedly connected to the upper side of the machine base, studs are fixedly connected at the four corners of the upper surface of the fixed plate, the movable sleeves on the four studs are provided with the same adjustment plate, the threaded sleeves on the studs are provided with two locking nuts, the adjustment plate is located between the two locking nuts, the upper side of the adjustment plate is fixedly connected to a second electric push rod, and the output end of the second electric push rod is fixedly connected to the lower side of the mounting frame.

[0014] Furthermore, a fixing piece is fixedly connected to the vertical outer wall of the housing, a lamp pole is fixedly connected to the fixing piece, and a status indicator light is fixedly connected to the upper end of the lamp pole.

[0015] Furthermore, an L-shaped plate is fixedly connected to the top of the casing, a fixed shaft is fixedly connected to the lower side of the L-shaped plate, a mounting seat is installed on the shaft wall of the fixed shaft, and a PLC controller is fixedly connected to the mounting seat.

[0016] Furthermore, two doors are symmetrically hinged on the vertical side walls of the base, and operation holes are opened on the vertical side walls of the doors.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention is provided with a silk-screen mechanism and a feeding mechanism. When in use, the stencil to be replaced is taken out from the adjustable screen frame, the new stencil is placed in the adjustable screen frame, the table is driven by the translation drive module to move to the bottom of the stencil, the table drives the CCD positioning camera to move to the bottom of the stencil, the CCD positioning camera shoots the MARK points on the stencil, the CCD positioning camera transmits the data to the silk-screen mechanism, the PCB to be printed is placed on the PCB board placement table on the table and centered, the two pressure bars are driven by the horizontal drive component to limit and fix the PCB to be printed, the translation drive module drives the table to move to the bottom of the stencil, the mark points shot by the CCD positioning camera are used to automatically and accurately position the PCB to be printed, thereby completing the fast and automatic positioning of the stencil and the PCB board, without the need for manual positioning by the operator, and effectively improving the efficiency and convenience of replacing the stencil of the silk-screen printing machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2It is a structural schematic diagram of another aspect of the present invention;

[0021] Figure 3 It is the front view of the present invention;

[0022] Figure 4 for Figure 1 Schematic diagram of the structure of the screen printing mechanism;

[0023] Figure 5 for Figure 1 Structural diagram of the middle feeding mechanism;

[0024] Figure 6 for Figure 5 Schematic diagram of the structure of part A;

[0025] Figure 7 for Figure 1 Schematic diagram of the structure of the mid-height adjustment component;

[0026] Figure 8 for Figure 1 Schematic diagram of the structure of the status indicator light.

[0027] Figure 1: Machine base; 2: Screen printing mechanism; 3: Feed mechanism; 4: Height adjustment assembly; 5: Mounting frame; 6: Adjustable screen frame; 7: First electric push rod; 8: Fixed frame; 9: Electric lead screw nut adjustment module; 10: Sliding frame; 11: Screen printing scraper; 12: Machine housing; 13: Translation drive module; 14: Table; 15: CCD positioning camera; 16: PCB board placement table; 17: Horizontal drive assembly; 18: Moving plate; 19: Bar hole; 20: Pressure strip; 21: Column ; 22. Equipment box; 23. Control panel; 24. Base; 25. Foot; 26. Mounting block; 27. Sliding rod; 28. Baffle; 29. Guide rod; 30. Controller; 31. Fixing plate; 32. Stud; 33. Adjustment plate; 34. Locking nut; 35. Second electric push rod; 36. Fixing part; 37. Light pole; 38. Status indicator light; 39. L-shaped plate; 40. Fixed shaft; 41. Mounting base; 42. PLC controller; 43. Box door; 44. Operation hole. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only 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 making creative efforts are within the scope of protection of the present invention.

[0029] See also Figure 1-8The present invention provides a CCD positioning fast screen-changing screen printing machine, comprising a machine base 1, a screen printing mechanism 2 and a feeding mechanism 3 being installed on the upper side of the machine base 1. When screen printing, the screen is first installed in the center of the plane of the adjustable screen frame 6, the table 14 enters and the CCD positioning camera 15 takes pictures of the mark points of the screen. After the marks of the screen are taken, the table 14 withdraws, and the PCB board is manually placed in the center of the table 14. The PCB board is fixed by the pressure strips 20 on both sides. The CCD positioning camera 15 automatically aligns the table 14, and the table 14 with the PCB to be printed enters the printing position. At this time, the screen and the PCB to be printed are aligned, and the printing operation begins. After printing is completed, the table withdraws with the PCB board, and after the board is removed, another board to be printed is replaced on the table.

[0030] The screen printing mechanism 2 includes four height adjustment components 4 fixedly connected to the upper side of the machine base 1, the output ends of the four height adjustment components 4 are fixedly connected to the same mounting frame 5, the interior of the mounting frame 5 is fixedly connected to an adjustable screen frame 6, the four corners of the upper surface of the mounting frame 5 are fixedly connected to first electric push rods 7, multiple first electric push rods 7 are fixedly connected to a fixing frame 8, the upper side of the fixing frame 8 is fixedly connected to an electric lead screw nut adjustment module 9, the electric lead screw nut adjustment module 9 is installed with a sliding frame 10, the lower side of the sliding frame 10 is symmetrically fixedly connected to two screen printing scrapers 11, the screen printing scrapers 11 are located above the adjustable screen frame 6;

[0031] The feeding mechanism 3 includes a casing 12 fixedly connected to the upper side of the machine base 1, the side wall of the upper side of the machine base 1 is fixedly connected to a translation drive module 13, the output end of the translation drive module 13 is fixedly connected to a table 14, the side wall of the upper side of the table 14 is fixedly connected to a CCD positioning camera 15, the upper side of the table 14 is fixedly connected to a PCB board placement table 16, the lower side of the table 14 is fixedly connected to two horizontal drive components 17, and the two horizontal drive components 17 are fixedly connected to a moving plate 18, a plurality of strip holes 19 are opened on the upper side of the table 14, the moving plate 18 passes through the table 14 through the strip holes 19, and the upper side of the moving plate 18 is fixedly connected to a pressure strip 20.

[0032] The stencil that needs to be replaced is taken out from the adjustable stencil frame 6 during use, and the new stencil is placed in the adjustable stencil frame 6. The table 14 is driven by the translation drive module 13 to move to the bottom of the stencil. The table 14 drives the CCD positioning camera 15 to move to the bottom of the stencil. The CCD positioning camera 15 shoots the MARK points on the stencil. The CCD positioning camera 15 transmits the data to the screen printing mechanism 2. The PCB to be printed is placed on the PCB board placement table 16 on the table 14 and centered. The two pressure strips 20 are driven by the horizontal drive component 17 to limit and fix the PCB to be printed. The translation drive module 13 drives the table 14 to move to the bottom of the stencil. The mark points shot by the CCD positioning camera 15 are used to automatically and accurately position the PCB to be printed, thereby completing the fast and automatic positioning of the stencil and the PCB board without the need for manual positioning by the operator, effectively improving the efficiency and convenience of replacing the stencil of the screen printing machine.

[0033] The housing 12 includes four columns 21 fixedly connected to the upper side of the base 1 . The upper ends of the four columns 21 are fixedly connected to a same equipment box 22 , and a control panel 23 is installed on the equipment box 22 .

[0034] In this embodiment, the control panel 23 can improve the convenience of controlling the screen printing machine.

[0035] The base 1 includes a base 24 . The base 24 is hollow inside, with an opening facing downward. A plurality of feet 25 are fixedly connected to the sidewall on the lower side of the base 24 .

[0036] In the above embodiment, the multiple footrests 25 can improve the stability of the screen printing machine and can lift the bottom of the screen printing machine off the ground, thereby improving the moisture-proof performance of the screen printing machine.

[0037] The side wall on the upper side of the fixed frame 8 is fixedly connected with a mounting block 26, and two through holes are provided on the mounting block 26, and sliding rods 27 are movably inserted into the through holes. Both ends of the two sliding rods 27 are fixedly connected with baffles 28, and a guide rail rod 29 is fixedly connected between the two baffles 28, and a controller 30 is fixedly connected to the guide rail rod 29.

[0038] In this embodiment, the controller 30 provided can improve the degree of automation of the control of the screen printing mechanism 2, thereby improving the convenience of using the screen printing machine.

[0039] The height adjustment assembly 4 includes a fixed plate 31 fixedly connected to the upper side of the machine base 1, and studs 32 are fixedly connected to the four corners of the upper surface of the fixed plate 31. The four studs 32 are movably sleeved with the same adjustment plate 33, and two locking nuts 34 are threadedly sleeved on the studs 32. The adjustment plate 33 is located between the two locking nuts 34, and a second electric push rod 35 is fixedly connected to the upper side of the adjustment plate 33. The output end of the second electric push rod 35 is fixedly connected to the lower side of the mounting frame 5.

[0040] In the above embodiment, when in use, the locking nut 34 is loosened to release the limiting fixation of the adjusting plate 33 by the locking nut 34, so that the height of the adjusting plate 33 can be adjusted, and the height of the second electric push rod 35 can be adjusted. After the adjustment is completed, the locking nut 34 can be retightened. The height of the screen can be adjusted through the second electric push rod 35, so that the screen can adapt to PCB boards of different thicknesses, thereby improving the applicability of the screen printing machine.

[0041] A fixing member 36 is fixedly connected to the vertical outer wall of the housing 12 , a lamp post 37 is fixedly connected to the fixing member 36 , and a status indicator light 38 is fixedly connected to the upper end of the lamp post 37 .

[0042] In this embodiment, the status indicator light 38 is provided to indicate the working status of the screen printing machine, thereby ensuring that the operator knows whether the screen printing machine is in a normal working state.

[0043] An L-shaped plate 39 is fixedly connected to the top of the housing 12 , a fixed shaft 40 is fixedly connected to the lower side of the L-shaped plate 39 , a mounting seat 41 is installed on the shaft wall of the fixed shaft 40 , and a PLC controller 42 is fixedly connected to the mounting seat 41 .

[0044] In the above embodiment, the PLC controller 42 can facilitate the control of the feeding mechanism 3, thereby improving the degree of automation of the feeding mechanism 3 and the convenience of using the screen printing machine.

[0045] Two doors 43 are symmetrically hinged to the vertical side walls of the base 24 , and operation holes 44 are opened on the vertical side walls of the doors 43 .

[0046] In the above embodiment, the provided box door 43 can be easily opened to operate the interior of the base 24, thereby improving the convenience of using the machine base 1. The provided operating hole 44 can improve the convenience of using the box door 43 and improve the convenience of opening and closing the box door 43.

[0047] Working principle: When in use, the stencil to be replaced is taken out from the adjustable stencil frame 6, and the new stencil is placed in the adjustable stencil frame 6, and the table 14 is driven by the translation drive module 13 to move to the bottom of the stencil, and the table 14 drives the CCD positioning camera 15 to move to the bottom of the stencil, and the CCD positioning camera 15 shoots the MARK point on the stencil, and the CCD positioning camera 15 transmits the data to the screen printing mechanism 2, and the PCB to be printed is placed on the PCB board placement table 16 on the table 14 and centered, and the two pressure bars 20 are driven by the horizontal drive component 17 to limit and fix the PCB to be printed, and the translation drive module 13 drives the table 14 to move to the bottom of the stencil, and the mark point photographed by the CCD positioning camera 15 is used to automatically and accurately position the PCB to be printed, thereby completing the fast and automatic positioning of the stencil and the PCB board, without the need for manual positioning by the operator, effectively improving the efficiency and convenience of replacing the stencil of the screen printing machine;

[0048] During screen printing, the stencil is first installed in the center of the adjustable screen frame 6 plane. The table 14 moves in and the CCD positioning camera 15 takes pictures of the mark points on the stencil. After the marks on the stencil are taken, the table 14 withdraws. The PCB is manually placed in the center of the table 14 and fixed by the pressure strips 20 on both sides. The CCD positioning camera 15 automatically aligns the PCB. The table 14 with the PCB to be printed enters the printing position. At this time, the stencil and the PCB to be printed are aligned, and the printing operation begins. After printing is completed, the table withdraws with the PCB, and after the PCB is removed, another PCB to be printed is placed on the table.

[0049] When in use, loosen the locking nut 34 to release the limiting fixation of the adjusting plate 33 by the locking nut 34, so that the height of the adjusting plate 33 can be adjusted, and the height of the second electric push rod 35 can be adjusted. After the adjustment is completed, tighten the locking nut 34 again. The height of the stencil can be adjusted by the second electric push rod 35, so that the stencil can be adapted to PCB boards of different thicknesses, thereby improving the applicability of the screen printing machine.

[0050] The provided box door 43 can be opened to facilitate operation inside the base 24, thereby improving the convenience of using the machine base 1. The provided operation hole 44 can improve the convenience of using the box door 43 and improve the convenience of opening and closing the box door 43.

[0051] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0052] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A CCD positioning quick screen changing screen printing machine, comprising a machine base (1), characterized in that: A screen printing mechanism (2) and a feeding mechanism (3) are installed on the upper side of the machine base (1); The screen printing mechanism (2) comprises four height adjustment components (4) fixedly connected to the upper side of the machine base (1), the output ends of the four height adjustment components (4) are fixedly connected to the same mounting frame (5), the interior of the mounting frame (5) is fixedly connected to an adjustable screen frame (6), the four corners of the upper surface of the mounting frame (5) are fixedly connected to first electric push rods (7), a plurality of the first electric push rods (7) are fixedly connected to a fixing frame (8), the upper side of the fixing frame (8) is fixedly connected to an electric lead screw nut adjustment module (9), a sliding frame (10) is installed on the electric lead screw nut adjustment module (9), and the lower side of the sliding frame (10) is symmetrically fixedly connected to two screen printing scrapers (11), and the screen printing scrapers (11) are located above the adjustable screen frame (6); The feeding mechanism (3) comprises a casing (12) fixedly connected to the upper side of the machine base (1); a translation drive module (13) is fixedly connected to the side wall of the upper side of the machine base (1); an output end of the translation drive module (13) is fixedly connected to a table (14); a CCD positioning camera (15) is fixedly connected to the side wall of the upper side of the table (14); a PCB board placement table (16) is fixedly connected to the upper side of the table (14); two horizontal drive assemblies (17) are fixedly connected to the lower side of the table (14); a moving plate (18) is fixedly connected to the two horizontal drive assemblies (17); a plurality of strip holes (19) are opened on the upper side of the table (14); the moving plate (18) passes through the table (14) through the strip holes (19); and a pressure strip (20) is fixedly connected to the upper side of the moving plate (18).

2. The CCD positioning quick screen changing screen printing machine according to claim 1, characterized in that: The housing (12) includes four columns (21) fixedly connected to the upper side of the base (1); the upper ends of the four columns (21) are fixedly connected to the same equipment box (22); and a control panel (23) is installed on the equipment box (22).

3. The CCD positioning fast screen changing screen printing machine according to claim 2, characterized in that: The machine base (1) comprises a base (24), the interior of the base (24) is a hollow structure, the opening of the base (24) faces downward, and the side wall on the lower side of the base (24) is fixedly connected to a plurality of footrests (25).

4. The CCD positioning fast screen changing screen printing machine according to claim 3, characterized in that: The side wall on the upper side of the fixing frame (8) is fixedly connected with a mounting block (26), two through holes are provided on the mounting block (26), and sliding rods (27) are movably inserted into the through holes, and baffles (28) are fixedly connected to both ends of the two sliding rods (27), and a guide rail rod (29) is fixedly connected between the two baffles (28), and a controller (30) is fixedly connected to the guide rail rod (29).

5. The CCD positioning fast screen changing screen printing machine according to claim 4, characterized in that: The height adjustment assembly (4) includes a fixed plate (31) fixedly connected to the upper side of the machine base (1), studs (32) are fixedly connected at the four corners of the upper surface of the fixed plate (31), the four studs (32) are movably sleeved with the same adjustment plate (33), two locking nuts (34) are threadedly sleeved on the studs (32), the adjustment plate (33) is located between the two locking nuts (34), the upper side of the adjustment plate (33) is fixedly connected to a second electric push rod (35), and the output end of the second electric push rod (35) is fixedly connected to the lower side of the mounting frame (5).

6. The CCD positioning fast screen changing screen printing machine according to claim 5, characterized in that: A fixing member (36) is fixedly connected to the vertical outer wall of the housing (12), a lamp post (37) is fixedly connected to the fixing member (36), and a status indicator light (38) is fixedly connected to the upper end of the lamp post (37).

7. The CCD positioning fast screen changing screen printing machine according to claim 6, characterized in that: An L-shaped plate (39) is fixedly connected to the top of the housing (12), a fixed shaft (40) is fixedly connected to the lower side of the L-shaped plate (39), a mounting seat (41) is installed on the shaft wall of the fixed shaft (40), and a PLC controller (42) is fixedly connected to the mounting seat (41).

8. The CCD positioning fast screen changing screen printing machine according to claim 7, characterized in that: Two box doors (43) are symmetrically hinged on the vertical side walls of the base (24), and operating holes (44) are opened on the vertical side walls of the box doors (43).

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