Screen printing product quality detection device for screen printing machine

Abstract

The utility model discloses a screen printing product quality detection device for a screen printing machine, belongs to the technical field of screen printing machines, and aims to solve the problems that only positioning and product quality judgment are carried out in detection, manual secondary reinspection is needed, the workload is increased, and the working efficiency is reduced. Comprising a workbench, a limiting mechanism, a detection frame, light supplementing mechanisms, visual identification detection equipment and a printing stock, the limiting mechanism and the detection frame are arranged above the workbench, the light supplementing mechanisms are symmetrically arranged on the front side and the rear side of the interior of the detection frame, and the visual identification detection equipment is arranged above the detection frame. The working table is arranged above the working table; by means of the limiting mechanism, when the electric push rod drives the single-side moving plate, the limiting plates on the two sides synchronously and symmetrically move, it is ensured that a printing stock is always centered and positioned and is not prone to deflection, manual positioning is not needed, the working efficiency is improved, the printing stock is prevented from deviating, and the accuracy of follow-up visual recognition detection equipment for detecting the printing stock is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of screen printing machine technology, specifically relating to a screen printing product quality inspection device for screen printing machines. Background Technology

[0002] A screen printing machine, also known as a silkscreen printing press, is a device that uses a screen to transfer ink onto a substrate. In the production of printed circuit boards (PCBs), screen printing machines are used to mark text, patterns, or symbols on the printed areas, typically indicating component locations, polarity, production batches, and other information. The main principle involves a squeegee on the screen printing stencil that scrapes and squeezes the ink, causing it to drip from the stencil and be imprinted onto the substrate.

[0003] The prior art patent publication number CN209191453U describes a printing quality inspection device for a screen printing machine. When the signal emitted by the photoelectric switch is reflected back to the photoelectric switch by the action of the baffles, the transmission device stops running. After a set time, the transmission device restarts. Positioning is performed after the transmission device travels a distance between two baffles, effectively reducing the accumulated errors caused by controlling the movement of the printing substrate solely through the transmission device. This avoids substandard printing quality, thereby reducing production costs and improving efficiency. However, in practical use, the following shortcomings remain: From a practical standpoint, this device only performs positioning and quality judgment, requiring secondary manual inspection, increasing workload and reducing efficiency. Furthermore, the fixed mechanical structure requires manual adjustment of the positioning bolts to accommodate different sized printing substrates, resulting in low efficiency.

[0004] Therefore, there is a need for a screen printing product quality inspection device for screen printing machines to solve the problem that the existing technology only performs positioning and quality judgment, requiring secondary manual inspection, which increases workload and reduces work efficiency. Utility Model Content

[0005] The purpose of this invention is to provide a screen printing product quality inspection device for screen printing machines, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a screen printing product quality inspection device for a screen printing machine, comprising a worktable, a limiting mechanism, an inspection frame, a supplementary lighting mechanism, a visual recognition inspection device, and a substrate. The limiting mechanism and the inspection frame are respectively disposed above the worktable. The supplementary lighting mechanism is symmetrically disposed on the front and rear sides inside the inspection frame. The visual recognition inspection device is disposed above the inspection frame. The worktable is disposed above the worktable, and the substrate passes through the limiting mechanism and the inspection frame in sequence.

[0007] It should be noted in the solution that the limiting mechanism consists of a support frame, a fixed shaft, a gear, a rack, a slide bar, a moving plate, a slider, a limiting plate, a roller, and an electric push rod. The support frame is fixedly connected to the top of the worktable, the fixed shaft is rotatably connected to the inside of the horizontal plate of the support frame, the gear is fixedly connected to the outside of the fixed shaft, and the rack is symmetrically arranged on the left and right sides along the center of the fixed shaft, and the rack and the gear mesh with each other.

[0008] It is worth noting that the slide bar is fixedly connected to one side of the rack, and the support frame has a groove inside that matches the slide bar. The moving plate is fixedly connected to the end of the rack away from the gear. The slider is fixedly connected to one side of the moving plate and slides inside the groove. The limiting plate is fixedly connected to the bottom of the moving plate, and the rollers are symmetrically rotated and connected to the left and right sides of the limiting plate.

[0009] Furthermore, it should be noted that the electric push rod is fixedly connected to the front of the support frame, and the output end of the electric push rod is fixedly connected to the front moving plate.

[0010] In a preferred embodiment, the supplementary lighting mechanism comprises a drive motor, a lead screw, a moving block, a limiting block, a connecting plate, a semi-circular fixing plate, a semi-circular baffle, a worm gear, a rotating plate, an arc-shaped block, a micro motor, a worm, and an LED board. The drive motor is fixedly connected to the top of the testing frame, the lead screw is rotatably connected to the inside of the vertical plate of the testing frame, the top end of the lead screw is fixedly connected to the output end of the drive motor, the moving block is threadedly connected to the outside of the lead screw, the limiting blocks are symmetrically fixedly connected to the left and right sides of the moving block, and the limiting blocks slide inside the vertical plate of the testing frame, and the connecting plate is fixedly connected to the back of the moving block.

[0011] In a preferred embodiment, the semicircular fixing plate is fixedly connected to the middle of the back of the connecting plate, the semicircular baffle is symmetrically fixedly connected to the left and right sides of the semicircular fixing plate, the arc surface of the semicircular baffle is provided with a groove, and the worm gear is fixedly connected to the middle of the back of the semicircular fixing plate.

[0012] In a preferred embodiment, the rotating plate has arc-shaped grooves on the left and right sides of its front side that are adapted to the semi-circular baffle. The arc-shaped block is fixedly connected to the inside of the arc-shaped groove and is slidably connected to the inside of the groove of the semi-circular baffle.

[0013] In a preferred embodiment, the micro motor is fixedly connected to the upper middle part of the rotating plate, the worm gear is fixedly connected to the output end of the micro motor and is rotatably connected to the rotating plate, the worm gear meshes with the worm wheel, and the LED board is fixedly connected to the back of the rotating plate.

[0014] Compared with the prior art, the screen printing product quality inspection device for screen printing machines provided by this utility model has at least the following beneficial effects:

[0015] (1) By setting the limiting mechanism, when the electric push rod drives the single-sided moving plate, the two limiting plates move synchronously and symmetrically to ensure that the substrate is always centered and not easily deviated. It also eliminates the need for manual positioning, improves work efficiency, prevents the substrate from deviating, and ensures the accuracy of subsequent visual recognition detection equipment.

[0016] (2) The set supplementary lighting mechanism can adjust the height of the LED board and the rotation angle of the LED board, adapt to highly reflective or matte materials, improve the uniformity of illumination, eliminate blind spots in detection, and significantly improve the accuracy and adaptability of visual recognition detection equipment, especially suitable for high-standard printed matter detection of complex materials. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0018] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0019] Figure 3 This is a schematic diagram of the internal structure of the support frame of this utility model;

[0020] Figure 4 This is a schematic diagram of the internal structure of the testing frame of this utility model;

[0021] Figure 5 This is a schematic diagram of the disassembled structure of the supplementary lighting mechanism of this utility model.

[0022] In the diagram: 1. Workbench; 2. Limiting mechanism; 3. Inspection frame; 4. Illumination mechanism; 5. Visual recognition inspection equipment; 6. Printing substrate; 201. Support frame; 202. Fixed shaft; 203. Gear; 204. Rack; 205. Slide bar; 206. Moving plate; 207. Slider; 208. Limiting plate; 209. Roller; 210. Electric push rod; 401. Drive motor; 402. Lead screw; 403. Moving block; 404. Limiting block; 405. Connecting plate; 406. Semi-circular fixing plate; 407. Semi-circular baffle; 408. Worm gear; 409. Rotating plate; 410. Arc groove; 411. Arc block; 412. Micro motor; 413. Worm gear; 414. LED board. Detailed Implementation

[0023] The present invention will be further described below with reference to the embodiments.

[0024] Please see Figure 1-5This utility model provides a screen printing product quality inspection device for a screen printing machine, including a worktable 1, a limiting mechanism 2, an inspection frame 3, a supplementary lighting mechanism 4, a visual recognition inspection device 5, and a substrate 6. The limiting mechanism 2 and the inspection frame 3 are respectively arranged above the worktable 1. The supplementary lighting mechanism 4 is symmetrically arranged on the front and rear sides inside the inspection frame 3. The visual recognition inspection device 5 is arranged above the inspection frame 3. The worktable 1 is arranged above the worktable 1, and the substrate 6 passes through the bottom of the limiting mechanism 2 and the inspection frame 3 in sequence.

[0025] Further as Figure 1 , Figure 2 and Figure 3 As shown, it is worth noting that the limiting mechanism 2 consists of a support frame 201, a fixed shaft 202, a gear 203, a rack 204, a slide bar 205, a moving plate 206, a slider 207, a limiting plate 208, a roller 209, and an electric push rod 210. The support frame 201 is fixedly connected to the top of the workbench 1. The fixed shaft 202 is rotatably connected to the inside of the horizontal plate of the support frame 201. The gear 203 is fixedly connected to the outside of the fixed shaft 202. The rack 204 is symmetrically arranged on the left and right sides along the center of the fixed shaft 202, and the rack 204 and the gear 203 mesh with each other.

[0026] Further as Figure 1 , Figure 2 and Figure 3 As shown, it is worth noting that the slide bar 205 is fixedly connected to one side of the rack 204, and the support frame 201 has a groove inside that matches the slide bar 205. The moving plate 206 is fixedly connected to the end of the rack 204 away from the gear 203. The slider 207 is fixedly connected to one side of the moving plate 206 and slides inside the groove. The limiting plate 208 is fixedly connected to the bottom of the moving plate 206, and the roller 209 is symmetrically rotated and connected to the left and right sides of the limiting plate 208.

[0027] The rollers 209 roll above the worktable 1 to ensure the stability of the limiting plate 208 as it moves with the moving plate 206, thus more stably limiting the edge of the substrate 6.

[0028] Further as Figure 1 , Figure 2 and Figure 3 As shown, it is worth noting that the electric push rod 210 is fixedly connected to the front of the support frame 201, and the output end of the electric push rod 210 is fixedly connected to the front moving plate 206.

[0029] As can be seen from the above working process: when the electric push rod 210 drives the single-sided moving plate 206 through the set limiting mechanism 2, the two limiting plates 208 move synchronously and symmetrically, ensuring that the substrate 6 is always centered and not easily deviated, and there is no need for manual positioning, which improves work efficiency, prevents the substrate 6 from deviating, and ensures the accuracy of subsequent visual recognition and inspection equipment 5 in detecting it.

[0030] Further as Figure 2 , Figure 4 and Figure 5 As shown, it is worth noting that the supplementary lighting mechanism 4 consists of a drive motor 401, a lead screw 402, a moving block 403, a limiting block 404, a connecting plate 405, a semi-circular fixing plate 406, a semi-circular baffle 407, a worm gear 408, a rotating plate 409, an arc-shaped block 411, a micro motor 412, a worm gear 413, and an LED board 414. The drive motor 401 is fixedly connected to the top of the detection frame 3. The lead screw 402 is rotatably connected to the inside of the vertical plate of the detection frame 3. The top end of the lead screw 402 is fixedly connected to the output end of the drive motor 401. The moving block 403 is threadedly connected to the outside of the lead screw 402. The limiting block 404 is symmetrically fixedly connected to the left and right sides of the moving block 403, and the limiting block 404 slides inside the vertical plate of the detection frame 3. The connecting plate 405 is fixedly connected to the back of the moving block 403.

[0031] Further as Figure 2 , Figure 4 and Figure 5 As shown, it is worth noting that the semicircular fixing plate 406 is fixedly connected to the middle of the back of the connecting plate 405, the semicircular baffle 407 is symmetrically fixedly connected to the left and right sides of the semicircular fixing plate 406, the arc surface of the semicircular baffle 407 is provided with a groove, the worm gear 408 is fixedly connected to the middle of the back of the semicircular fixing plate 406, the left and right sides of the front of the rotating plate 409 are provided with arc grooves 410 that are adapted to the semicircular baffle 407, the arc block 411 is fixedly connected to the inside of the arc groove 410, and the arc block 411 is slidably connected to the inside of the groove of the semicircular baffle 407.

[0032] The worm gear 413 meshes with the worm wheel 408 to drive the rotating plate 409 to rotate. The arc blocks 411 on both sides slide inside the groove of the semi-circular baffle 407, which stably drives the rotating plate 409 to rotate, thereby improving the rotational stability of the LED board 414.

[0033] Further as Figure 2 , Figure 4 and Figure 5As shown, it is worth noting that the micro motor 412 is fixedly connected to the upper middle part of the rotating plate 409, the worm gear 413 is fixedly connected to the output end of the micro motor 412, and the worm gear 413 is rotatably connected to the rotating plate 409. The worm gear 413 meshes with the worm wheel 408, and the LED board 414 is fixedly connected to the back of the rotating plate 409.

[0034] The visual recognition inspection device 5 includes a CCD visual recognition camera, which acquires image information of the surface of the substrate 6 and identifies it by the visual recognition system equipped with the visual recognition inspection device 5. The image information is compared with that of the substrate 6 after normal screen printing to determine whether the image information marking on the surface of the substrate 6 after screen printing is qualified.

[0035] This solution has the following working process: During use, the substrate 6 enters the workbench 1 via a conveyor belt. The electric push rod 210 pushes the front moving plate 206, which drives the left rack 204 to move. This drives the gear 203 to rotate, driving the racks 204 on both sides to move synchronously in opposite directions. The moving plate 206 drives the lower limiting plate 208 to move towards each other, so that the limiting plate 208 adapts to the width of the substrate 6, ensuring the stability of the substrate 6 during transportation and preventing deviation. When it moves to the bottom of the inspection frame 3, the drive motor 401 drives the lead screw 402 to rotate, and the moving block 403 moves up and down along the vertical plate of the inspection frame 3, thereby adjusting the vertical height of the LED board 414. Then, the micro motor 412 drives the worm gear 413 to rotate, and the core worm wheel 408 drives the rotating plate 409 to rotate, so that the illumination angle of the LED board 414 is adapted to the surface characteristics of the substrate. The CCD vision recognition camera captures the surface image of the substrate 6, which is compared with the standard template through the vision recognition system. The detection result is fed back to the control system in real time, marking unqualified products and triggering an alarm.

[0036] In summary: Through the setting of the limiting mechanism 2, when the electric push rod 210 drives the single-sided moving plate 206, the two limiting plates 208 move synchronously and symmetrically, ensuring that the substrate 6 is always centered and not easily deviated, and eliminating the need for manual positioning, thus improving work efficiency, preventing the substrate 6 from deviating, and ensuring the accuracy of subsequent visual recognition and inspection equipment 5 in detecting it; through the setting of the supplementary lighting mechanism 4, the height of the LED plate 414 can be adjusted, as well as the rotation angle of the LED plate 414 can be adjusted, adapting to highly reflective or matte materials, improving the uniformity of illumination, eliminating blind spots in detection, and significantly improving the accuracy and adaptability of the visual recognition and inspection equipment 5, especially suitable for the inspection of high-standard printed materials with complex materials.

Claims

1. A silk screen printing product quality detection device for a silk screen printing machine, comprising a workbench (1), a limiting mechanism (2), a detection frame (3), a light supplementing mechanism (4), a visual recognition detection equipment (5) and a printing substrate (6), characterized in that: The limiting mechanism (2) and the detection frame (3) are arranged above the workbench (1), the light supplementing mechanism (4) is symmetrically arranged inside the detection frame (3) on the front and back sides, the visual identification detection equipment (5) is arranged above the detection frame (3), the workbench (1) is arranged above the workbench (1), and the printing object (6) sequentially passes below the limiting mechanism (2) and the detection frame (3).

2. A screen printing product quality detection device for a screen printing machine according to claim 1, characterized in that: The limiting mechanism (2) is composed of a support frame (201), a fixed shaft (202), a gear (203), a rack (204), a sliding bar (205), a moving plate (206), a sliding block (207), a limiting plate (208), a roller (209) and an electric push rod (210), the support frame (201) is fixedly connected above the workbench (1), the fixed shaft (202) is rotatably connected inside the horizontal plate of the support frame (201), the gear (203) is fixedly connected to the outside of the fixed shaft (202), the rack (204) is symmetrically arranged on the left and right sides along the center of the fixed shaft (202), and the rack (204) and the gear (203) are meshed with each other.

3. A screen printing product quality detection device for a screen printing machine according to claim 2, characterized in that: The sliding bar (205) is fixedly connected to one side of the rack (204), and the inside of the support frame (201) is provided with a sliding groove matched with the sliding bar (205), the moving plate (206) is fixedly connected to one end of the rack (204) away from the gear (203), the sliding block (207) is fixedly connected to one side of the moving plate (206), and the sliding block (207) slides in the inside of the sliding groove, the limiting plate (208) is fixedly connected below the moving plate (206), and the roller (209) is rotatably connected to the left and right sides of the limiting plate (208).

4. The screen printing product quality detection device for a screen printer according to claim 3, characterized in that: The electric push rod (210) is fixedly connected to the front of the support frame (201), and the output end of the electric push rod (210) is fixedly connected to the front moving plate (206).

5. A screen printing product quality detection device for a screen printing machine according to claim 4, characterized in that: The light supplementing mechanism (4) is composed of a driving motor (401), a lead screw (402), a moving block (403), a limiting block (404), a connecting plate (405), a semicircular fixed plate (406), a semicircular baffle (407), a worm gear (408), a rotating plate (409), an arc block (411), a micro motor (412), a worm (413) and an LED plate (414), the driving motor (401) is fixedly connected above the detection frame (3), the lead screw (402) is rotatably connected inside the vertical plate of the detection frame (3), the top end of the lead screw (402) is fixedly connected with the output end of the driving motor (401), the moving block (403) is threadedly connected outside the lead screw (402), the limiting block (404) is symmetrically fixedly connected to the left and right sides of the moving block (403), and the limiting block (404) slides in the vertical plate of the detection frame (3), and the connecting plate (405) is fixedly connected to the back of the moving block (403).

6. A screen printing product quality detection device for a screen printing machine according to claim 5, characterized in that: The semicircle fixed plate (406) is fixedly connected to the middle part of the back of the connecting plate (405), the semicircle baffle (407) is fixedly connected to the left and right sides of the semicircle fixed plate (406), the arc surface of the semicircle baffle (407) is provided with a groove, and the worm wheel (408) is fixedly connected to the middle part of the back of the semicircle fixed plate (406).

7. A screen printing product quality detection device for a screen printing machine according to claim 6, characterized in that: The front left and right sides of the rotating plate (409) are provided with arc grooves (410) matched with the semicircle baffle (407), the arc blocks (411) are fixedly connected to the interiors of the arc grooves (410), and the arc blocks (411) are slidingly connected to the interiors of the grooves of the semicircle baffle (407).

8. A screen printing product quality detection device for a screen printing machine according to claim 7, characterized in that: The micro motor (412) is fixedly connected to the middle upper part of the rotating plate (409), the worm (413) is fixedly connected to the output end of the micro motor (412), and the worm (413) is rotatably connected with the rotating plate (409); the worm (413) and the worm wheel (408) are meshed with each other, and the LED plate (414) is fixedly connected to the back of the rotating plate (409).

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