An automatic screen printing machine

Abstract

The invention discloses an automatic silk screen printing machine, comprising a machine base and a control device, wherein a conveyor belt assembly is arranged on the upper end of the machine base, a vertical driving device is arranged on the machine base at the rear end of the conveyor belt assembly, the vertical driving device is connected with a transverse movement module, a knife block connecting plate is slidably connected with a single degree of freedom on the transverse movement module, the front end of the knife block connecting plate is fixedly connected with a silk screen knife block, a left sliding bar and a right sliding bar are slidably connected in the silk screen knife block, the upper ends of the left sliding bar and the right sliding bar are respectively connected with a left scraper cylinder and a right scraper cylinder, the right scraper cylinder and the left scraper cylinder are fixedly installed on the upper end of the silk screen knife block, the lower ends of the left sliding bar and the right sliding bar are respectively connected with the left scraper and the right scraper, a stripping cylinder is arranged on the right end surface of the silk screen knife block, and a stripping pressure head is arranged at the free end of the stripping cylinder; a right screen support is fixedly arranged at the lower end of the transverse movement module, a silk screen is installed on the screen support, and the silk screen is provided with a stripping hole matched with the stripping pressure head. It has high efficiency, low cost, stable silk screen quality and does not stick to the board.

Description

Technical Field

[0001] The invention belongs to the technical field of screen printing mechanical equipment, and in particular relates to an automatic screen printing machine. Background Art

[0002] LED lamps are widely accepted by the market due to their excellent energy saving and long life. When manufacturing LEDs, thermal grease needs to be applied to the lamp board, but the existing thermal grease for lamp boards is manually screen-printed, which is inefficient, costly, and of unstable quality. Some auxiliary screen printers are also used to apply thermal grease, but the main problem is that after screen printing, the screen printing screen and the lamp board are stuck together due to the stickiness of the thermal grease, affecting the screen printing of the thermal grease for the next lamp board. Secondly, only a fixed specification of lamp board can be screen-printed. Finally, it requires frequent manual addition of thermal grease, and untimely addition of thermal grease seriously affects the quality of screen printing. Summary of the invention

[0003] In order to solve the problems raised in the above background technology, the present invention provides the following technical solutions: The control device of claim 1, wherein the guide rail is provided with a plurality of guide rails, the guide rails being provided with a plurality of guide rails each having a plurality of guide rails, and the guide rails are provided with a plurality of guide rails each having a plurality of guide rails.

[0004] Preferably, the left slide bar and the left scraper cylinder are connected via a slide bar fixing plate, and the slide bar fixing plate is also provided with a left limiting column.

[0005] Preferably, the silk-screen screen comprises a substrate and a silk-screen hole array arranged on the substrate, and the off-board hole is located at the center of the silk-screen hole array.

[0006] Preferably, the stripping pressure head is hemispherical.

[0007] Preferably, a grease dispensing valve is further provided on the left end surface of the screen printing knife block, the upper end of the grease dispensing valve is connected to the silicone grease supply device through a hose, and a grease dispensing head is installed at the lower end of the grease dispensing valve.

[0008] Preferably, the vertical drive device includes a column fixedly mounted on the upper end of the machine base, a slider slidably connected to the column, and a lifting linear drive element, and a first proximity switch is installed on the upper end of the slider.

[0009] Preferably, the conveyor belt assembly includes a conveyor belt, detection elements installed at the ends and the middle of the conveyor belt, and an adjustment component.

[0010] Preferably, a left adjustment block is provided between the stripping cylinder and the screen printing knife block, and during adjustment, the stripping cylinder can slide along the left adjustment block with a single degree of freedom.

[0011] Preferably, the thickness of the silk screen printing plate is 0.1-0.25 mm, and the diameter of the stripping hole is 1-3 cm.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. The present invention can fix the lamp board on the transmission belt assembly by arranging the screen printing knife block, the stripping cylinder and the stripping pressure head so that the stripping pressure head can move relative to the screen printing screen, thereby preventing the lamp board from sticking to the screen printing screen after the thermal conductive silicone grease is screen printed.

[0014] 2. The present invention realizes automatic addition of thermal grease by arranging a grease dispensing valve and a grease dispensing head on the screen printing knife block, thereby effectively avoiding the situation in which the screen printing product is defective due to lack of thermal grease in the screen printing screen during the screen printing process.

[0015] 3. The present invention meets the requirements of screen printing of light boards of different sizes by providing a motion device for driving the scraper and simultaneously providing a cooperatively driven transverse movement module and a vertical drive device, thereby greatly improving the versatility of use of the screen printing machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 is the main view;

[0018] Figure 2 It is the left view;

[0019] Figure 3 is the rear view;

[0020] Figure 4 This is a detailed view of point A;

[0021] Figure 5 It is a schematic diagram of the structure of the silk screen printing plate;

[0022] In the figure: 1. base; 2. adjustment component; 3. conveyor belt assembly; 4. lamp board; 5. detection element; 6. screen printing screen; 7. screen support; 8. stripping head; 9. right scraper; 10. stripping cylinder; 11. right adjustment block; 12. right limit column; 13. right scraper cylinder; 14. left scraper cylinder; 15. left limit column; 16. screen printing knife block; 17. left adjustment block; 18. knife block connecting plate; 19. grease valve; 20. transverse module; 21. grease head; 22. left scraper; 23. vertical drive device; 24. silicone grease supply device; 25. Slide bar fixing plate; 26. Left slide bar; 27. Right slide bar; 28. Column; 29. ​​Sliding block; 30. Lifting linear drive element; 31. First proximity switch; 32. Conveyor belt; 601. Base plate; 602. Silk screen hole array; 603. De-board hole. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention. Example

[0024] See also Figure 1-5 The present invention provides the following technical solutions: An automatic screen printing machine, comprising a machine base 1 and a control device, wherein a conveyor belt assembly 3 for conveying a light board is arranged at the upper end of the machine base 1, and a vertical driving device 23 is arranged at the rear end of the conveyor belt assembly 3 and is installed on the machine base 1, wherein the vertical driving device 23 is connected to a lateral movement module 20, wherein a knife block connecting plate 18 is slidably connected to the lateral movement module 20 with a single degree of freedom, wherein the front end of the knife block connecting plate 18 is fixedly connected to a screen printing knife block 16, wherein a left slide bar 26 and a right slide bar 27 are slidably connected to the screen printing knife block 16, wherein the upper ends of the left slide bar 26 and the right slide bar 27 are respectively The left scraper cylinder 14 and the right scraper cylinder 13 are connected separately, and the right scraper cylinder 13 and the left scraper cylinder 14 are fixedly installed on the upper end of the screen printing knife block 16. The lower ends of the left slide bar 26 and the right slide bar 27 are respectively connected to the left scraper 22 and the right scraper 9. The right end surface of the screen printing knife block 16 is provided with a stripping cylinder 10, and the free end of the stripping cylinder 10 is provided with a stripping pressure head 8; the lower end of the transverse movement module 20 is fixed with a right screen support 7, and the screen support 7 is installed with a screen printing screen 6, and the screen printing screen 6 is provided with a stripping hole 603 that cooperates with the stripping pressure head 8. The control device is used to control the action sequence of the following working principle part, which adopts the existing technology and is not repeated here.

[0025] Working principle: When in use, the light board to be screen-printed is placed on the conveyor belt assembly 3 manually or automatically. Specifically, the conveyor belt assembly 3 mentioned here includes a conveyor belt 32, detection elements 5 installed at the ends and the middle of the conveyor belt, and an adjustment component 2. The light board to be screen-printed is transported to the bottom of the screen printing screen 6 by the conveyor belt 32 and is detected by the detection element 5 in the middle. At this time, the conveyor belt 32 stops moving and the light board to be screen-printed stops here. Thereafter, the vertical drive device 23 drives the transverse movement module 20 to move downward. Specifically, the vertical drive device 23 mentioned here includes a column 28 fixedly installed on the upper end of the machine base 1, a slider 29 slidably connected to the column 28, and a lifting linear drive element 30. A first proximity switch 31 is installed on the upper end of the slider 29. The transverse shift module 20 moves downward, driving the lower end of the screen printing screen 6 installed thereunder to press on the lamp board to be screen printed, and then the right scraper cylinder 13 and the left scraper cylinder 14 extend alternately, and then the transverse shift module 20 drives the screen printing knife block 16 to move left and right to complete the screen printing. When the screen printing is completed, the linear drive element extends, driving the slider 29 and the transverse shift module 20 to drive the screen printing screen 6 to move upward in turn. At this time, the free end of the stripping cylinder 10 extends to drive the stripping pressure head 8 to pass through the screen printing screen 6, that is, through the stripping hole 603 described below to press on the lamp board after the screen printing is completed. The lamp board can be fixed on the transmission belt assembly to prevent the lamp board from sticking to the screen printing screen 6 after the thermal grease is screen printed. Further, the screen printing screen 6 includes a substrate 601 and a screen printing hole array 602 arranged on the substrate, and the stripping hole 603 is located at the center of the screen printing hole array 602. Setting the board removal hole 603 at the center of the silk-screen hole array 602 allows the board removal press head 8 to be pressed on the center position of the lamp board after silk-screen printing. Compared with no pressing or pressing on the lamp board at an offset position, it is more conducive to the lamp board being separated from the silk-screen screen 6, and it is also helpful to prevent the lamp board from being misaligned.

[0026] Specifically, the invention has been found through research that the thickness of the silk screen 6 is 0.1-0.25mm, the diameter of the stripping hole 603 is 1-3cm, and in particular, when the thickness of the substrate is less than 0.15mm and the diameter of the stripping hole 603 is 3cm, the silk screen effect is best. Preferably, specifically, the stripping head 8 is hemispherical, so that the contact area between the stripping head 8 and the light board that has completed silk screen printing is small enough to be point contact. Its main function is to have a better pressing force while preventing the stripping head 8 and the light board that has completed silk screen printing from sticking together. In order to protect the silk screen 6, the left slide bar 26 and the left scraper cylinder 14 are connected by a slide bar fixing plate 25, and the slide bar fixing plate 25 is also provided with a left limit column 15. When the left scraper cylinder 14 extends, it prevents the left scraper 22 from moving down too much and causing damage to the silk screen 6. Similarly, the connection between the right slide bar 27 and the right scraper cylinder 13 is the same as the connection between the left slide bar 26 and the left scraper cylinder 14. At this time, a right limit column 12 is required, which will not be repeated here.

[0027] Based on the above-mentioned technical scheme, the inventor has proposed the following scheme, and the other parts remain unchanged. Specifically, the left end face of the screen printing knife block 16 is also provided with a grease valve 19, the upper end of the grease valve 19 is connected to the silicone grease supply device 24 through a hose, and the lower end of the grease valve 19 is installed with a grease head 21. By setting the grease valve 19 and the grease head 21 on the screen printing knife block 16, automatic addition of thermal grease is achieved, which effectively avoids the situation where the screen printing product is defective due to lack of thermal grease in the screen printing screen 6 during the screen printing process. Furthermore, in order to meet the requirements of screen printing of light boards of different sizes, the wide use of this screen printing machine is greatly improved. A right adjustment block 11 is provided between the de-boarding cylinder 10 and the screen printing knife block 16. When adjusting, the de-boarding cylinder 10 can slide along the right adjustment block 11 with a single degree of freedom. Similarly, a left adjustment block 17 is provided between the grease valve 19 and the screen printing knife block 16. When adjusting, the grease valve 19 can slide along the left adjustment block 17 with a single degree of freedom. After the two are adjusted, they can be tightened with screws such as horseshoe nails to meet the silk screen printing needs of light boards of different specifications and sizes.

[0028] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An automatic screen printing machine, comprising a machine base (1) and a control device, characterized in that: A conveyor belt assembly (3) for conveying the light board is arranged at the upper end of the machine base (1); a vertical driving device (23) is arranged at the rear end of the conveyor belt assembly (3) and is mounted on the machine base (1); the vertical driving device (23) is connected to a transverse movement module (20); a knife block connecting plate (18) is slidably connected to the transverse movement module (20) in a single degree of freedom; the front end of the knife block connecting plate (18) is fixedly connected to a screen printing knife block (16); a left sliding rod (26) and a right sliding rod (27) are slidably connected inside the screen printing knife block (16); the upper ends of the left sliding rod (26) and the right sliding rod (27) are respectively connected to a left scraper The right scraper cylinder (14) and the right scraper cylinder (13) are fixedly mounted on the upper end of the screen printing knife block (16); the lower ends of the left slide bar (26) and the right slide bar (27) are respectively connected to the left scraper (22) and the right scraper (9); a stripping cylinder (10) is provided on the right end surface of the screen printing knife block (16); a stripping pressure head (8) is provided at the free end of the stripping cylinder (10); a screen support (7) is fixedly mounted on the lower end of the transverse movement module (20); a screen printing screen (6) is mounted on the screen support (7); the screen printing screen (6) is provided with a stripping pressure head (8) connected to the stripping pressure head. The screen printing screen (6) comprises a substrate (601) and a screen printing hole array (602) arranged on the substrate (601), and the screen printing hole (603) is located at the center of the screen printing hole array (602); the screen printing press head (8) is hemispherical; the left end surface of the screen printing knife block (16) is also provided with a grease valve (19), the upper end of the grease valve (19) is connected to the silicone grease supply device (24) through a rubber hose, and the lower end of the grease valve (19) is installed with a grease head (21); the vertical drive device (23) comprises a base (601) fixedly mounted on the machine base (1) A column (28) at the upper end, a slider (29) slidably connected to the column (28), and a lifting linear drive element (30), wherein a first proximity switch (31) is installed at the upper end of the slider (29); a right adjustment block (11) is provided between the stripping cylinder (10) and the screen printing knife block (16), and during adjustment, the stripping cylinder (10) can slide along the right adjustment block (11) with a single degree of freedom; a left adjustment block (17) is provided between the grease dispensing valve (19) and the screen printing knife block (16), and during adjustment, the grease dispensing valve (19) can slide along the left adjustment block (17) with a single degree of freedom.

2. The automatic screen printing machine according to claim 1, characterized in that: The left sliding rod (26) and the left scraper cylinder (14) are connected via a sliding rod fixing plate (25), and the sliding rod fixing plate (25) is also provided with a left limiting column (15).

3. The automatic screen printing machine according to claim 1, characterized in that: The conveyor belt assembly (3) comprises a conveyor belt (32), detection elements (5) installed at the ends and the middle of the conveyor belt, and an adjustment component (2).

4. The automatic screen printing machine according to claim 3, characterized in that: The thickness of the silk screen (6) is 0.1-0.25 mm, and the diameter of the stripping hole (603) is 1-3 cm.

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