Screen printing plate positioning mechanism for screen printing

Abstract

The invention provides a silk-screen printing plate positioning mechanism for silk-screen printing, and relates to the technical field of silk-screen printing. The switch is installed on the positioning unit, the two screen printing plate bodies are installed on the positioning unit, and the conveying belt is arranged below the positioning unit. The replacement units are mounted on the left side and the right side of the positioning unit; the number of the limiting units is four, and the four limiting units are installed on the positioning unit. The printing ink adding unit is mounted at the top of the positioning unit; the material guiding unit is mounted at the top of the positioning unit; the printing ink collecting unit is mounted at the bottom of the positioning unit; according to the screen printing plate, workers can conveniently and rapidly replace the screen printing plate body, the downtime is shortened, and the screen printing progress is guaranteed; the problems that when a silk-screen printing plate is damaged, shutdown is needed for manual replacement, ink needs to be added to the replaced silk-screen printing plate, the shutdown time is prolonged, and the silk-screen printing progress is affected are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of screen printing, and more specifically, particularly relates to a screen printing plate positioning mechanism for screen printing. Background Art

[0002] Screen printing refers to the use of a silk screen as a base, and through the photosensitive platemaking method, a screen printing plate with images is made. Screen printing consists of five major elements: screen printing plate, scraper, ink, printing table and substrate. Printing is carried out based on the basic principle that the mesh holes of the image part of the screen printing plate can pass the ink, while the mesh holes of the non-image part cannot pass the ink. The screen printing plate is connected to the screen printing equipment through a positioning mechanism.

[0003] The current screen printing plate positioning mechanism still has the following problems: 1. When the screen printing plate is damaged, it is necessary to stop the machine for manual replacement, and ink needs to be added to the replaced screen printing plate, which increases the downtime and easily causes the entire production line to stop working, affecting the progress of screen printing; 2. Generally, the screen printing plate is positioned by pressing the knob, which cannot prevent the positioned screen printing plate from moving, resulting in poor positioning effect of the screen printing plate; 3. Usually there is a lack of guiding and positioning structure, which leads to deviation of the material to be printed after placement, thus reducing the accuracy of screen printing. Summary of the invention

[0004] The disclosed embodiment relates to a screen printing plate positioning mechanism for screen printing, which has a positioning unit, a replacement unit, a limit unit, an ink adding unit and a material guiding unit; it is convenient for staff to quickly replace the screen printing plate body, reduces downtime, ensures the progress of screen printing, and prevents the screen printing plate body from moving, making the screen printing plate body more stable after positioning, ensuring that the material is used in the same position after being placed, and improving printing accuracy; it solves the problems of increased downtime, affecting the progress of screen printing, failing to prevent the positioned screen printing plate from moving, and easy deviation of the material to be printed after placement.

[0005] In a first aspect of the present disclosure, a screen printing plate positioning mechanism for screen printing is provided, comprising a positioning unit, a switch, a replacement unit, a limit unit, an ink adding unit, a material guiding unit and an ink collecting unit; the switch is mounted on the positioning unit, and two screen printing plate bodies are mounted on the positioning unit, and a conveyor belt is arranged below the positioning unit; The replacement unit is installed on the left and right sides of the positioning unit, and the replacement unit is used to replace the screen printing version body; the limiting unit is provided with four groups, and the four groups of limiting units are installed on the positioning unit, and the four groups of limiting units are used to limit the two screen printing version bodies; The ink adding unit is installed on the top of the positioning unit; the material guiding unit is installed on the top of the positioning unit, and the material guiding unit is used to improve the printing accuracy; the ink collecting unit is installed on the bottom of the positioning unit.

[0006] In at least some embodiments, the positioning unit includes: a device connection bracket and a positioning frame; the device connection bracket is provided with four bolt mounting holes; the positioning frame is slidably mounted on the device connection bracket, and the switch is fixedly mounted in a groove of the positioning frame.

[0007] In at least some embodiments, the replacement unit includes: an electric cylinder and a connecting plate; there are two electric cylinders, and the two electric cylinders are fixedly installed on the left and right sides of the equipment connecting bracket; there are two connecting plates, and the two connecting plates are fixedly installed on the left and right sides of the positioning frame, and the rear sides of the two connecting plates are fixedly connected to the output shafts of the two electric cylinders; when the output shafts of the two electric cylinders are fully retracted, the screen-printed version body on the front side moves to the position of the screen-printed version body on the rear side, and the equipment connecting bracket can press the switch.

[0008] In at least some embodiments, the limiting unit includes: a limiting knob and a rectangular mounting rod; the limiting knob is threadedly connected to the positioning frame; and the rectangular mounting rod is rotatably mounted on the outside of the limiting knob.

[0009] In at least some embodiments, the limit unit also includes: a limit clamp ring and an anti-shift limit rod; there are two limit clamp rings in total, and the two limit clamp rings are fixedly installed on the outside of the limit knob, and the inner sides of the two limit clamp rings are in contact with the rectangular mounting rod; there are two anti-shift limit rods in total, and the two anti-shift limit rods are fixedly installed on the rectangular mounting rod, and the two anti-shift limit rods are also slidably connected to the positioning frame; the bottoms of the two anti-shift limit rods are chamfered, and the bottoms of the two anti-shift limit rods are five millimeters away from the bottom of the limit knob, and the outer walls of the two anti-shift limit rods are in contact with the screen printed version body.

[0010] In at least some embodiments, the ink adding unit includes: a U-shaped support frame and an ink pump; the U-shaped support frame is fixedly mounted on the top of the equipment connecting bracket; the ink pump is fixedly mounted on the top of the U-shaped support frame, and the ink pump is electrically connected to the switch; when the switch is pressed, the ink pump works for five seconds.

[0011] In at least some embodiments, the ink adding unit further includes: an ink adding tube and an ink inlet tube; the ink adding tube is fixedly installed on the front side of the ink pump; and the ink inlet tube is fixedly installed on the rear side of the ink pump.

[0012] In at least some embodiments, the material guiding unit includes: a guide rail, a material guiding seat and a material guiding roller; the guide rail is fixedly mounted on the top of the equipment connecting bracket, and the inner wall of the guide rail is provided with two rows of stable slots; the material guiding seat is slidably mounted on the guide rail; the material guiding rollers are provided in a row, and a row of material guiding rollers are rotatably mounted on the material guiding seat, and the bottom of a row of material guiding rollers is in contact with the conveyor belt.

[0013] In at least some embodiments, the material guiding unit further includes: an adjusting handle, a stabilizing block and a supporting spring; the adjusting handle is fixedly mounted on the top of the material guiding seat; there are two stabilizing blocks, and the two stabilizing blocks are slidably mounted inside the material guiding seat; the outer ends of the two stabilizing blocks are hemispherical structures, and the two stabilizing blocks are inserted into two stabilizing slots in the middle; the supporting spring is installed between the two stabilizing blocks.

[0014] In at least some embodiments, the ink collecting unit includes: an L-shaped angle iron, an ink collecting box and a U-shaped handle; there are two L-shaped angle irons, and the two L-shaped angle irons are fixedly installed on the bottom of the equipment connecting bracket; the ink collecting box is slidably installed on the two L-shaped angle irons, and the top of the ink collecting box is in contact with the equipment connecting bracket, and the two L-shaped angle irons are connected to the ink collecting box by interference fit; there are two U-shaped handles, and the two U-shaped handles are fixedly installed on the left and right sides of the ink collecting box.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention facilitates the connection of the equipment connection bracket with the screen printing equipment through bolts; when the screen printing version body is damaged, the staff will fully retract the output shafts of the two electric cylinders. When the output shafts of the two electric cylinders are fully retracted, the screen printing version body on the front side moves to the position of the screen printing version body on the rear side, which is convenient for the staff to quickly replace the screen printing version body, reduces downtime, and ensures the progress of screen printing.

[0016] 2. In the present invention, when the staff tightens the limit knob, the bottom of the limit knob is in close contact with the screen printing version body, which plays a positioning role for the screen printing version body; when the bottom of the limit knob is in close contact with the screen printing version body, the two anti-shift limit rods are also in contact with the screen printing version body, which plays an anti-shift role for the screen printing version body, making the screen printing version body more stable after positioning.

[0017] 3. In the present invention, when the switch is pressed, the ink pump works for five seconds, which automatically adds ink to the new screen printing plate body after replacement, reduces downtime, and ensures the progress of screen printing; at the same time, it avoids the ink dripping on the old screen printing plate body, making the screen printing equipment neater.

[0018] 4. The present invention plays a role in positioning the material to be printed, ensuring that the material is placed in the same position for use, thereby improving printing accuracy; at the same time, it is convenient for printing on thinner materials; In addition, it is convenient for the staff to appropriately adjust the position of a row of material guide rollers to achieve the control of the printing position; at the same time, it has an elastic limiting effect on the material guide seat, making the material guide seat more stable after adjustment; when the staff moves the material guide seat by adjusting the handle, the two stabilizing blocks automatically move inward under the action of the hemispherical structure at the outer end. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0020] The drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention.

[0021] In the attached picture: Figure 1 A three-dimensional structural schematic diagram of the present application is shown.

[0022] Figure 2 Shows this application Figure 1 Schematic diagram of the left perspective structure.

[0023] Figure 3 A schematic diagram of the structure of the positioning unit and the switch of the present application is shown.

[0024] Figure 4 Shows this application Figure 1 Schematic diagram of the local enlarged structure of area A in the middle.

[0025] Figure 5 The schematic diagram of the structure of the ink adding unit of the present application is shown.

[0026] Figure 6 A structural schematic diagram of the material guiding unit of the present application is shown.

[0027] Figure 7 A schematic diagram of the central cutaway structure of the material guiding unit of the present application is shown.

[0028] Figure 8 Shows this application Figure 7 Schematic diagram of the local enlarged structure of area B in the middle.

[0029] Fig. 9 Shows this application Figure 1 The right side main view structure diagram.

[0030] Fig.10 Shows this application Fig. 9 Schematic diagram of the local enlarged structure of the C area in the middle.

[0031] List of reference numerals: 1. Positioning unit; 101. Equipment connection bracket; 1011. Bolt mounting hole; 102. Positioning frame; 2. Switch; 3. Screen printing version; 4. Replacement unit; 401. Electric cylinder; 402. Connection plate; 5. Limit unit; 501. Limit knob; 502. Rectangular mounting rod; 503. Limit clamp ring; 504. Anti-shift limit rod; 6. Ink adding unit; 601. U-shaped support frame; 602. Ink pump; 603. Ink adding pipe; 604. Ink inlet pipe; 7. Material guide unit; 701. Guide rail; 7011. Stable card slot; 702. Material guide seat; 703. Material guide roller; 704. Adjustment handle; 705. Stable card block; 706. Support spring; 8. Ink collecting unit; 801. L-shaped angle iron; 802. Ink collecting box; 803. U-shaped handle; 9. Conveyor belt. DETAILED DESCRIPTION

[0032] In order to make the purpose, scheme and advantages of the technical solution of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described in conjunction with the drawings of the specific embodiments of the present invention. Unless otherwise specified, the terms used herein have the usual meanings in the art. The same reference numerals in the drawings represent the same components.

[0033] Example: Please refer to Figures 1 to 10As shown: The present invention provides a screen printing plate positioning mechanism for screen printing, comprising a positioning unit 1, a switch 2, a replacement unit 4, a limiting unit 5, an ink adding unit 6, a material guiding unit 7 and an ink collecting unit 8; the switch 2 is installed on the positioning unit 1, and two screen printing plate bodies 3 are installed on the positioning unit 1, and a conveyor belt 9 is arranged below the positioning unit 1; the replacement unit 4 is installed on the left and right sides of the positioning unit 1, and the replacement unit 4 is used to replace the screen printing plate body 3; there are four groups of limiting units 5, and four groups of limiting units 5 are installed on the positioning unit 1, and the four groups of limiting units 5 are used to limit the two screen printing plate bodies 3; the ink adding unit 6 is installed on the top of the positioning unit 1; the material guiding unit 7 is installed on the top of the positioning unit 1, and the material guiding unit 7 is used to improve printing accuracy; the ink collecting unit 8 is installed at the bottom of the positioning unit 1.

[0034] In the present disclosure, Figure 2 and Figure 3 As shown, the positioning unit 1 includes: a device connection bracket 101 and a positioning frame 102; four bolt mounting holes 1011 are opened on the device connection bracket 101; the positioning frame 102 is slidably mounted on the device connection bracket 101, and the switch 2 is fixedly mounted in the groove of the positioning frame 102; The replacement unit 4 includes: an electric cylinder 401 and a connecting plate 402; there are two electric cylinders 401, and the two electric cylinders 401 are fixedly installed on the left and right sides of the equipment connection bracket 101; there are two connecting plates 402, and the two connecting plates 402 are fixedly installed on the left and right sides of the positioning frame 102, and the rear sides of the two connecting plates 402 are fixedly connected to the output shafts of the two electric cylinders 401; when the output shafts of the two electric cylinders 401 are fully retracted, the screen printing body 3 on the front side moves to the position of the screen printing body 3 on the rear side, and the equipment connection bracket 101 can press the switch 2; Its specific function is: because four bolt mounting holes 1011 are provided on the equipment connecting bracket 101, it is convenient to connect the equipment connecting bracket 101 with the screen printing equipment by bolts, and because the two connecting plates 402 are fixedly installed on the left and right sides of the positioning frame 102, and the rear sides of the two connecting plates 402 are fixedly connected to the output shafts of the two electric cylinders 401, when the screen printing version body 3 is damaged, the staff will retract all the output shafts of the two electric cylinders 401. When the output shafts of the two electric cylinders 401 are all retracted, the screen printing version body 3 on the front side moves to the position of the screen printing version body 3 on the rear side, which is convenient for the staff to quickly replace the screen printing version body 3, reducing downtime, avoiding the entire production line from stopping work, and ensuring the progress of screen printing.

[0035] In the present disclosure, Figure 4As shown, the limit unit 5 includes: a limit knob 501 and a rectangular mounting rod 502; the limit knob 501 is threadedly connected to the positioning frame 102; the rectangular mounting rod 502 is rotatably mounted on the outside of the limit knob 501; the limit unit 5 also includes: a limit collar 503 and an anti-shift limit rod 504; there are two limit collars 503, and the two limit collars 503 are fixedly mounted on the outside of the limit knob 501, and the inner sides of the two limit collars 503 are aligned with the rectangular mounting rod 502. The two anti-shift limit rods 504 are in contact with the rectangular mounting rod 502; there are two anti-shift limit rods 504, and the two anti-shift limit rods 504 are fixedly mounted on the rectangular mounting rod 502, and the two anti-shift limit rods 504 are also slidably connected to the positioning frame 102; the bottoms of the two anti-shift limit rods 504 are chamfered, and the bottoms of the two anti-shift limit rods 504 are five millimeters away from the bottom of the limit knob 501, and the outer walls of the two anti-shift limit rods 504 are in contact with the screen printing version body 3; Its specific function is as follows: because the limit knob 501 is threadedly connected to the positioning frame 102, when the staff tightens the limit knob 501, the bottom of the limit knob 501 is in close contact with the screen printing version body 3, which plays a positioning role for the screen printing version body 3, and because the inner sides of the two limit collars 503 are in contact with the rectangular mounting rod 502, and the bottom of the two anti-shift limit rods 504 are five millimeters away from the bottom of the limit knob 501, and the outer walls of the two anti-shift limit rods 504 are in contact with the screen printing version body 3, when the bottom of the limit knob 501 is in close contact with the screen printing version body 3, the two anti-shift limit rods 504 are also in contact with the screen printing version body 3, which plays an anti-shift role for the screen printing version body 3, making the screen printing version body 3 more stable after positioning.

[0036] In the present disclosure, Figure 5 , Fig. 9 and Fig.10 As shown, the ink adding unit 6 includes: a U-shaped support frame 601 and an ink pump 602; the U-shaped support frame 601 is fixedly mounted on the top of the equipment connection bracket 101; the ink pump 602 is fixedly mounted on the top of the U-shaped support frame 601, and the ink pump 602 is electrically connected to the switch 2; when the switch 2 is pressed, the ink pump 602 works for five seconds; the ink adding unit 6 also includes: an ink adding tube 603 and an ink inlet tube 604; the ink adding tube 603 is fixedly mounted on the front side of the ink pump 602; the ink inlet tube 604 is fixedly mounted on the rear side of the ink pump 602; The ink collecting unit 8 includes: an L-shaped angle iron 801, an ink collecting box 802 and a U-shaped handle 803; there are two L-shaped angle irons 801, and the two L-shaped angle irons 801 are fixedly installed at the bottom of the equipment connecting bracket 101; the ink collecting box 802 is slidably installed on the two L-shaped angle irons 801, and the top of the ink collecting box 802 is in contact with the equipment connecting bracket 101, and the two L-shaped angle irons 801 are connected to the ink collecting box 802 by interference fit; there are two U-shaped handles 803, and the two U-shaped handles 803 are fixedly installed on the left and right sides of the ink collecting box 802; Its specific function is as follows: because the ink pump 602 is electrically connected to the switch 2, and the equipment connection bracket 101 can press the switch 2, when the switch 2 is pressed, the ink pump 602 works for five seconds, which automatically adds ink to the new screen printing version body 3 after replacement, reduces downtime, avoids the entire production line from stopping work, and ensures the progress of screen printing; and because the ink collecting box 802 is slidably installed on the two L-shaped angle irons 801, and the ink collecting box 802 is located directly below the old screen printing version body 3 after replacement, it avoids the ink on the old screen printing version body 3 from dripping, making the screen printing equipment more tidy.

[0037] In the present disclosure, Figures 6 to 8 As shown, the material guide unit 7 includes: a guide rail 701, a material guide seat 702 and a material guide roller 703; the guide rail 701 is fixedly installed on the top of the equipment connection bracket 101, and the inner wall of the guide rail 701 is provided with two rows of stable card slots 7011; the material guide seat 702 is slidably installed on the guide rail 701; the material guide rollers 703 are arranged in a row, and the material guide rollers 703 in a row are rotatably installed on the material guide seat 702, and the bottom of the material guide rollers 703 in a row are connected to the conveying The material guide unit 7 further comprises: an adjusting handle 704, a stabilizing block 705 and a supporting spring 706; the adjusting handle 704 is fixedly mounted on the top of the material guide seat 702; there are two stabilizing blocks 705, and the two stabilizing blocks 705 are slidably mounted inside the material guide seat 702; the outer ends of the two stabilizing blocks 705 are hemispherical structures, and the two stabilizing blocks 705 are inserted into the two stabilizing slots 7011 in the middle; the supporting spring 706 is mounted between the two stabilizing blocks 705; The specific functions are as follows: since the row of material guide rollers 703 are rotatably mounted on the material guide seat 702, the material to be printed is positioned, ensuring that the material is placed in the same position for use, thereby improving the printing accuracy; and since the bottom of the row of material guide rollers 703 is in contact with the conveyor belt 9, it is convenient to print thinner materials; Because the material guide seat 702 is slidably installed on the guide rail 701, and the adjustment handle 704 is fixedly installed on the top of the material guide seat 702, it is convenient for the staff to appropriately adjust the position of a row of material guide rollers 703, thereby realizing the control of the printing position. In addition, because the inner wall of the guide rail 701 is provided with two rows of stable slots 7011, and two stable blocks 705 are inserted into the two middle stable slots 7011, and the support spring 706 is installed between the two stable blocks 705, the material guide seat 702 has an elastic limiting effect, making the material guide seat 702 more stable after adjustment; when the staff moves the material guide seat 702 by adjusting the handle 704, the two stable blocks 705 automatically move inward under the action of the hemispherical structure at the outer end.

[0038] The specific usage and function of this embodiment are as follows: When the present invention is used, the staff first connects the equipment connection bracket 101 to the screen printing equipment through bolts, connects the ink adding tube 603 to the external ink storage container, and then slides and installs the two screen printing version bodies 3 on the positioning frame 102, and then properly adjusts the positions of the two screen printing version bodies 3. Then, the staff tightens the four limit knobs 501. At this time, the bottoms of the four limit knobs 501 are in close contact with the two screen printing version bodies 3, which plays a positioning role for the two screen printing version bodies 3. When the bottoms of the four limit knobs 501 are in close contact with the two screen printing version bodies 3, , the eight anti-shift limit rods 504 are also in contact with the two screen printing version bodies 3, which play an anti-shift role for the two screen printing version bodies 3, making the two screen printing version bodies 3 more stable after positioning; then according to the printing position, the position of a row of material guide rollers 703 is appropriately adjusted by adjusting the handle 704, so as to realize the control of the printing position, play a positioning role for the material to be printed, ensure that the material is placed in the same position, and improve the printing accuracy; the setting of the two stabilizing blocks 705 plays an elastic limiting effect on the material guide seat 702, making the material guide seat 702 more stable after adjustment; When the screen printing version body 3 is damaged, the staff will retract the output shafts of the two electric cylinders 401. When the output shafts of the two electric cylinders 401 are fully retracted, the screen printing version body 3 on the front side moves to the position of the screen printing version body 3 on the rear side, which is convenient for the staff to quickly replace the screen printing version body 3; when the switch 2 is pressed, the ink pump 602 works for five seconds, which automatically adds ink to the new screen printing version body 3 after replacement, reduces downtime, and ensures the progress of screen printing; the setting of the ink collection box 802 avoids the ink on the old screen printing version body 3 from dripping, making the screen printing equipment tidier; after get off work, the staff will replace the damaged screen printing version body 3 to avoid the entire production line from stopping.

[0039] In this article, there are a few points to note: 1. The drawings of the embodiments of the present disclosure only involve structures related to the embodiments of the present disclosure, and other structures may refer to general designs.

[0040] 2. In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to obtain new embodiments.

[0041] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A screen printing plate positioning mechanism for screen printing, comprising a positioning unit (1), a switch (2), a replacement unit (4), a limit unit (5), an ink adding unit (6), a material guiding unit (7) and an ink collecting unit (8); characterized in that: The switch (2) is mounted on the positioning unit (1), and two screen printing bodies (3) are mounted on the positioning unit (1), and a conveyor belt (9) is provided below the positioning unit (1); The replacement unit (4) is installed on the left and right sides of the positioning unit (1), and the replacement unit (4) is used to replace the screen printing version body (3); the limiting unit (5) is provided with four groups in total, and the four groups of limiting units (5) are installed on the positioning unit (1), and the four groups of limiting units (5) are used to limit the two screen printing version bodies (3); The ink adding unit (6) is installed on the top of the positioning unit (1); the material guiding unit (7) is installed on the top of the positioning unit (1), and the material guiding unit (7) is used to improve printing accuracy; and the ink collecting unit (8) is installed on the bottom of the positioning unit (1).

2. A screen printing plate positioning mechanism for screen printing according to claim 1, characterized in that: The positioning unit (1) comprises: an equipment connection bracket (101) and a positioning frame (102); the equipment connection bracket (101) is provided with four bolt mounting holes (1011); the positioning frame (102) is slidably mounted on the equipment connection bracket (101), and the switch (2) is fixedly mounted in a groove of the positioning frame (102).

3. A screen printing plate positioning mechanism for screen printing according to claim 2, characterized in that: The replacement unit (4) comprises: an electric cylinder (401) and a connecting plate (402); two electric cylinders (401) are provided, and the two electric cylinders (401) are fixedly mounted on the left and right sides of the equipment connecting bracket (101); two connecting plates (402) are provided, and the two connecting plates (402) are fixedly mounted on the left and right sides of the positioning frame (102), and the rear sides of the two connecting plates (402) are fixedly connected to the output shafts of the two electric cylinders (401); when the output shafts of the two electric cylinders (401) are fully retracted, the screen printing body (3) on the front side moves to the position of the screen printing body (3) on the rear side, and the equipment connecting bracket (101) can press the switch (2).

4. A screen printing plate positioning mechanism for screen printing according to claim 2, characterized in that: The limiting unit (5) comprises: a limiting knob (501) and a rectangular mounting rod (502); the limiting knob (501) is threadedly connected to the positioning frame (102); and the rectangular mounting rod (502) is rotatably mounted on the outside of the limiting knob (501).

5. A screen printing plate positioning mechanism for screen printing according to claim 4, characterized in that: The limit unit (5) further comprises: a limit collar (503) and an anti-shift limit rod (504); two limit collars (503) are provided, and the two limit collars (503) are fixedly mounted on the outside of the limit knob (501), and the inner sides of the two limit collars (503) are in contact with the rectangular mounting rod (502); two anti-shift limit rods (504) are provided, and the two anti-shift limit rods (504) are fixedly mounted on the rectangular mounting rod (502), and the two anti-shift limit rods (504) are also slidably connected to the positioning frame (102); the bottoms of the two anti-shift limit rods (504) are chamfered, and the distance between the bottoms of the two anti-shift limit rods (504) and the bottom of the limit knob (501) is five millimeters, and the outer walls of the two anti-shift limit rods (504) are in contact with the screen printing plate body (3).

6. A screen printing plate positioning mechanism for screen printing according to claim 2, characterized in that: The ink adding unit (6) comprises: a U-shaped support frame (601) and an ink pump (602); the U-shaped support frame (601) is fixedly mounted on the top of the equipment connecting bracket (101); the ink pump (602) is fixedly mounted on the top of the U-shaped support frame (601), and the ink pump (602) is electrically connected to the switch (2); when the switch (2) is pressed, the ink pump (602) works for five seconds.

7. A screen printing plate positioning mechanism for screen printing according to claim 6, characterized in that: The ink adding unit (6) further comprises: an ink adding tube (603) and an ink inlet tube (604); the ink adding tube (603) is fixedly mounted on the front side of the ink pump (602); and the ink inlet tube (604) is fixedly mounted on the rear side of the ink pump (602).

8. The screen printing plate positioning mechanism for screen printing according to claim 2, characterized in that: The material guide unit (7) comprises: a guide rail (701), a material guide seat (702) and a material guide roller (703); the guide rail (701) is fixedly mounted on the top of the equipment connection bracket (101), and the inner wall of the guide rail (701) is provided with two rows of stable slots (7011); the material guide seat (702) is slidably mounted on the guide rail (701); the material guide rollers (703) are provided in a row, and the material guide rollers (703) in the row are rotatably mounted on the material guide seat (702), and the bottoms of the material guide rollers (703) in the row are in contact with the conveyor belt (9).

9. A screen printing plate positioning mechanism for screen printing according to claim 8, characterized in that: The material guide unit (7) further comprises: an adjustment handle (704), a stabilizing block (705) and a support spring (706); the adjustment handle (704) is fixedly mounted on the top of the material guide seat (702); two stabilizing blocks (705) are provided, and the two stabilizing blocks (705) are slidably mounted inside the material guide seat (702); the outer ends of the two stabilizing blocks (705) are hemispherical structures, and the two stabilizing blocks (705) are inserted into two stabilizing slots (7011) in the middle; and the support spring (706) is mounted between the two stabilizing blocks (705).

10. The screen printing plate positioning mechanism for screen printing according to claim 2, characterized in that: The ink collecting unit (8) comprises: an L-shaped angle iron (801), an ink collecting box (802) and a U-shaped handle (803); two L-shaped angle irons (801) are provided, and the two L-shaped angle irons (801) are fixedly mounted on the bottom of the equipment connecting bracket (101); the ink collecting box (802) is slidably mounted on the two L-shaped angle irons (801), and the top of the ink collecting box (802) is in contact with the equipment connecting bracket (101), and the two L-shaped angle irons (801) are connected to the ink collecting box (802) by interference fit; two U-shaped handles (803) are provided, and the two U-shaped handles (803) are fixedly mounted on the left and right sides of the ink collecting box (802).

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