Screen printing product detection device and detection method thereof

Abstract

The invention relates to the technical field of silk-screen product detection, in particular to a silk-screen product detection device and a detection method thereof. The silk-screen product detection device is sequentially provided with a card issuing mechanism, a pre-acceleration mechanism, a detection mechanism, a transmission mechanism, a waste rejecting mechanism, a good product transmission mechanism and a vertical material receiving mechanism along a product advancing route. The printed matter detection device is reasonable in design and easy and convenient to operate, printed matters are separated one by one through the card issuing mechanism, the printed matters are conveyed through the pre-acceleration mechanism, the printed matters are photographed through the detection mechanism, defective products are rejected through the waste rejecting mechanism, good products are conveyed to the vertical material receiving mechanism through the good product conveying mechanism, the detection precision is high, and the detection speed is high; the equipment is stable in operation and high in mechanization degree, and can improve the product quality while saving manpower.

Description

Technical Field

[0001] The invention relates to the technical field of silk-screen product detection, in particular to a silk-screen product detection device and a detection method thereof. Background Art

[0002] Silk-screen products are an important technical product in the field of electronic equipment processing. The detection of silk-screen products is a key link to ensure the quality of silk-screen products. In the existing technology, the detection of silk-screen products is generally carried out by manually operating the detection equipment, through manual power-on, movement, detection, sorting and other procedures, and finally manual statistics of the detection results. This method is time-consuming and labor-intensive, with relatively low efficiency, and the detection accuracy is not high enough, and the operation is relatively complicated. Therefore, the existing technology needs to be improved. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art and provide a screen printing product detection device and a detection method thereof. The present invention uses a line scan camera to take photos and analyze screen printing products, which has high efficiency in defect detection, saves labor, and can improve product quality.

[0004] The technical solution adopted by the present invention to solve the technical problem is: a screen printing product detection device, which is provided with a card issuing mechanism, a pre-acceleration mechanism, a detection mechanism, a transmission mechanism, a waste rejection mechanism, a good product transmission mechanism and a vertical material receiving mechanism in sequence along the product travel route;

[0005] The detection mechanism includes a detection frame, on which a light source group and a camera group are arranged, and the camera group is arranged above the light source group; the light source group is provided with a first light source, a second light source and a third light source in sequence along the product travel route, the first light source and the third light source are arranged above the product, and the second light source is arranged below the product; the camera group includes a first camera coordinated with the first light source, a second camera coordinated with the second light source, and a third camera coordinated with the third light source; a light shielding plate is arranged above the second light source, and the light shielding plate is arranged above the product;

[0006] A first detection area is provided on the first light source for facilitating the first light source to shoot, a second detection area is provided on the shading plate for facilitating the second camera to shoot, and a third detection area is provided on one side of the third light source for facilitating the third camera to shoot.

[0007] Furthermore, the detection frame is provided with a camera bracket for installing a camera group, and the detection frame is also equipped with a detection pressure wheel for pressing the product.

[0008] Furthermore, the first light source is a dome light source, and the second light source and the third light source are both bar light sources; the first camera, the second camera and the third camera are all line scan cameras.

[0009] Furthermore, the card issuing mechanism comprises a card issuing frame and a material carrier, the card issuing frame is provided with a transplanting assembly, the transplanting assembly is located above the material carrier, and a suction cup assembly is installed at the output end of the transplanting assembly; a baffle is installed on the material carrier, and the baffle is arranged relative to the suction cup assembly;

[0010] The card issuing machine frame is provided with a lifting component for driving the material carrying plate to rise and fall.

[0011] Furthermore, a first crossbeam is installed on the card issuing machine frame, a group of material stop rod mounting seats are provided on the first crossbeam, a material stop rod is installed on the material stop rod mounting seats, a long hole is provided on the loading plate, two material stop rods are arranged through the long hole, and the two material stop rods are arranged on both sides of the product.

[0012] Furthermore, the second light source is installed between the pre-acceleration mechanism and the transmission mechanism, and the conveying belts of the pre-acceleration mechanism and the transmission mechanism are suction belts; a pressing wheel assembly is installed at the feeding end of the pre-acceleration mechanism, and a pressing wheel assembly is installed at the discharging end of the transmission mechanism;

[0013] The pre-acceleration mechanism comprises a first anti-warping edge pressure wheel and a second anti-warping edge pressure wheel installed above the conveyor belt, and the second anti-warping edge pressure wheel is arranged close to the side of the pre-acceleration mechanism frame.

[0014] Furthermore, the waste rejection mechanism includes a waste rejection flap installed between the transmission mechanism and the good product transmission mechanism, a waste frame for collecting waste is provided below the good product transmission mechanism, a waste rejection guide plate is installed at the feeding end of the waste frame, the waste rejection guide plate and the waste frame are both inclined and have the same inclination angle; the waste rejection flap is installed with a flip shaft, and the flip shaft is connected to the waste rejection drive mechanism.

[0015] Furthermore, the good product transmission mechanism includes a good product transmission frame, on which an inclined support plate and multiple transmission belts are installed, and the multiple transmission belts are laid along the upper surface of the support plate; a good product pressure wheel assembly is installed on the good product transmission frame, and the pressure wheel of the good product pressure wheel assembly is set against the transmission belt; and an opening is opened on the side panel of the good product transmission frame to facilitate the removal of the waste frame.

[0016] Furthermore, the vertical material receiving mechanism includes a material receiving frame and a material receiving platform, the material receiving frame is equipped with a second crossbeam located above the material receiving platform, the second crossbeam is equipped with two paper patting board bases, the bottom of the paper patting board bases is equipped with a cylinder, and the output end of the cylinder is equipped with a paper patting board for patting the products neatly; the material receiving platform is equipped with a rear baffle to prevent the products from rushing out of the material receiving platform;

[0017] The material receiving machine frame is provided with a lifting component for lifting the material receiving platform.

[0018] Furthermore, the lifting mechanism includes a motor and two lifting assemblies, the motor drives one of the lifting assemblies to work; the lifting assemblies include a belt and a slide rail assembly respectively, the belt is wound around a driving wheel and a driving wheel, and the driving wheels of the two lifting assemblies are connected by a synchronous shaft; the slide rail assembly includes a track and a slider connected in a sliding manner, the slider is connected to the belt, and the belt rotates to drive the slider to rise and fall;

[0019] The lifting mechanism also includes a limit mechanism, which includes a limit insert and two limit sensors distributed up and down; the two limit sensors are respectively installed on the card issuing frame and the material receiving frame, and the limit insert is installed on the material loading plate and the material receiving table.

[0020] The beneficial effects of the present invention are as follows: the present invention has reasonable design and is easy to operate. The printed materials are separated one by one by a card issuing mechanism, transmitted by a pre-acceleration mechanism, photographed by a detection mechanism, and defective products are rejected by a waste rejection mechanism, and good products are transmitted to a vertical material receiving mechanism by a good product transmission mechanism. The detection accuracy is high and the detection speed is fast. The equipment runs smoothly and has a high degree of mechanization. While saving labor, the quality of the product can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0022] Figure 1 It is a schematic diagram of the structure of the present invention;

[0023] Figure 2 yes Figure 1 A top view of

[0024] Figure 3 It is a schematic diagram of the structure of the card issuing institution;

[0025] Figure 4 It is a structural diagram from another perspective of the card issuer;

[0026] Figure 5 It is a structural schematic diagram of the pre-acceleration mechanism and the transmission mechanism;

[0027] Figure 6 It is a schematic diagram of the structure of the testing organization;

[0028] Figure 7 yes Figure 5 The main view;

[0029] Figure 8 yes Figure 6 A top view of

[0030] Fig. 9 It is the installation diagram of the waste rejection mechanism and the good product transmission mechanism;

[0031] Fig.10 yes Fig. 9 The main view;

[0032] Fig.11 It is a structural diagram of the good product transmission mechanism;

[0033] Fig.12 It is a structural diagram of the vertical material receiving mechanism;

[0034] Fig.13 It is a structural diagram of the lifting mechanism;

[0035] Fig.14 yes Fig.13 A partial enlarged view of point A in the middle.

[0036] In the figure: 100. card issuing mechanism, 200. pre-acceleration mechanism, 300. detection mechanism, 400. transmission mechanism, 500. waste rejection mechanism, 600. good product transmission mechanism, 700. vertical material receiving mechanism, 800. product, 900. lifting component;

[0037] 101. a material carrier plate, 102. a baffle plate, 103. a transplanting assembly, 104. a suction cup assembly, 105. a first crossbeam, 106. a material baffle rod;

[0038] 201. a pressing wheel assembly, 202. a first anti-warping edge pressing wheel, 203. a second anti-warping edge pressing wheel;

[0039] 301. first light source, 302. second light source, 303. third light source, 304. first camera, 305. second camera, 306. third camera, 307. light shielding plate, 308. first detection area, 309. second detection area, 310. third detection area, 311. detection pressure wheel, 312. camera bracket;

[0040] 501. Waste rejection flap, 502. Waste rejection guide plate, 503. Waste frame, 504. Turning shaft,

[0041] 601. Support plate, 602. Transmission belt, 603. Good product transmission rack, 604. Good product pressure wheel assembly, 605. Opening;

[0042] 701. Material receiving table, 702. Back baffle, 703. Paper patter, 704. Second beam;

[0043] 901. synchronous shaft, 902. belt, 903. motor, 904. track, 905. slider, 906. limit sensor, 907. limit insert. DETAILED DESCRIPTION

[0044] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0045] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0046] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] like Figure 1 and Figure 2 A silk-screen product inspection device is shown, in which a card issuing mechanism 100, a pre-acceleration mechanism 200, a detection mechanism 300, a transmission mechanism 400, a waste rejection mechanism 500, a good product transmission mechanism 600 and a vertical material receiving mechanism 700 are sequentially arranged along the travel route of a product 800, and also includes a controller for controlling the operation of the entire silk-screen product inspection device.

[0048] like Figure 6 to Figure 8As shown, the detection mechanism 300 includes a detection frame, on which a light source group and a camera group are provided, and the camera group is arranged above the light source group; the light source group is provided with a first light source 301, a second light source 302 and a third light source 303 in sequence along the travel route of the product 800, the first light source 301 and the third light source 303 are arranged above the product 800, and the second light source 302 is arranged below the product 800; the camera group includes a first camera 304 cooperating with the first light source 301, a second camera 305 cooperating with the second light source 302, and a third camera 306 cooperating with the third light source 303; a shading plate 307 is provided above the second light source 302, and the shading plate 307 is arranged above the product 800; a first detection area 308 is provided on the first light source 301 for facilitating the shooting of the first light source 301, a second detection area 309 is provided on the shading plate 307 for facilitating the shooting of the second camera 305, and a third detection area 310 is provided on one side of the third light source 303 for facilitating the shooting of the third camera 306. The light shielding plate 307 prevents excess light of the second light source 302 from entering the second camera 305 .

[0049] A camera bracket 312 for mounting a camera group is provided on the detection frame, and a detection pressing wheel 311 for pressing the product 800 is also installed on the detection frame.

[0050] The first light source 301 is a dome light source, the second light source 302 and the third light source 303 are both bar light sources; the first camera 304, the second camera 305 and the third camera 306 are all line scan cameras.

[0051] The first camera 304 cooperates with the first light source 301 to detect defects such as mixture, mixed goods, and color deficiency; the second camera 305 cooperates with the second light source 302, and the third camera 306 cooperates with the third light source 303, and the defects that can be detected are: inaccurate overprinting (double corners / burrs / large and small edges, etc.), mesh blockage (keyholes, missing, etc.), dirty mesh (excessive gold, dirty spots), false hot stamping, brushing, burrs, color difference, and scratches.

[0052] like Figure 3 and Figure 4 As shown, the card issuing mechanism 100 includes a card issuing frame and a carrier plate 101. The card issuing frame is provided with a transplanting assembly 103, and the transplanting assembly 103 is located above the carrier plate 101. A suction cup assembly 104 is installed at the output end of the transplanting assembly 103; a baffle 102 is installed on the carrier plate 101, and the baffle 102 is arranged relative to the suction cup assembly 104; a lifting assembly for driving the carrier plate 101 to rise and fall is provided on the card issuing frame.

[0053] A first crossbeam 105 is installed on the card issuing machine frame, a group of stopper rod mounting seats are provided on the first crossbeam 105, a stopper rod 106 is installed on the stopper rod mounting seats, a long hole is provided on the material carrying plate 101, two stopper rods 106 are arranged through the long hole, and the two stopper rods 106 are arranged on both sides of the product 800. Two stopper rods 106 are provided, firstly, the distance between the two stopper rods 106 is adjustable, which is suitable for different models of products 800, and secondly, the stopper rod 106 can limit the product 800 on the material carrying plate 101, and cooperate with the baffle 102 to prevent the product 800 from shifting during the card issuing process.

[0054] like Figure 5 As shown, the second light source 302 is installed between the pre-acceleration mechanism 200 and the transmission mechanism 400, and the conveying belts of the pre-acceleration mechanism 200 and the transmission mechanism 400 are suction belts; a pressure wheel assembly 201 is installed at the feeding end of the pre-acceleration mechanism 200, and a pressure wheel assembly 201 is installed at the discharging end of the transmission mechanism 400; the pre-acceleration mechanism 200 includes a first anti-warping pressure wheel 202 and a second anti-warping pressure wheel 203 installed above the conveying belt, and the second anti-warping pressure wheel 203 is arranged close to the side of the frame of the pre-acceleration mechanism 200.

[0055] The speed of the card issuing mechanism 100 is lower than that of the transmission mechanism 400, so a pre-acceleration mechanism 200 is provided to increase the transmission speed of the product 800, and cooperate with the detection mechanism 300 and the transmission mechanism 400. The pressure wheel assembly 201 can increase the friction between the product 800 and the suction belt, and the suction belt can prevent the product 800 from moving during the transmission process. The first anti-warping pressure wheel 202 is used for small-sized products, and the second anti-warping pressure wheel 203 is used for large-sized products to prevent the product from warping, so that the product can be tested flatly and the detection efficiency can be improved. The first anti-warping pressure wheel 202 and the second anti-warping pressure wheel 203 can both adjust their positions and are suitable for products of more sizes.

[0056] like Figures 9 to 11 As shown, the waste rejection mechanism 500 includes a waste rejection flap 501 installed between the transmission mechanism 400 and the good product transmission mechanism 600, a waste frame 503 for collecting waste is provided below the good product transmission mechanism 600, a waste rejection guide plate 502 is installed at the feeding end of the waste frame 503, the waste rejection guide plate 502 and the waste frame 503 are both inclined and have the same inclination angle; the waste rejection flap 501 is installed with a turning shaft 504, and the turning shaft 504 is connected to a waste rejection driving mechanism.

[0057] The good product transmission mechanism 600 includes a good product transmission frame 603, on which an inclined support plate 601 and a plurality of transmission belts 602 are installed, and the plurality of transmission belts 602 are laid along the upper surface of the support plate 601; a good product pressing wheel assembly 604 is installed on the good product transmission frame 603, and the pressing wheel of the good product pressing wheel assembly 604 is arranged against the transmission belt 602; and an opening 605 is provided on the side plate of the good product transmission frame 603 for facilitating the removal of the waste frame 503. When the waste frame 503 is full, it is taken out from the opening 605 for replacement.

[0058] The angle between the support plate 601 and the horizontal plane is 5°, and the output end is higher than the input end, so that the support plate 601 forms a climbing structure, providing a certain parabolic angle for subsequent vertical material collection. Because the product 800 is large in size, if it is thrown horizontally, the tail of the product 800 will droop, which is not conducive to the neat collection of the product 800.

[0059] like Fig.12 As shown, the vertical material receiving mechanism 700 includes a material receiving frame and a material receiving table 701, the material receiving frame is provided with a second crossbeam 704 located above the material receiving table 701, two paper beating paper bases are provided on the second crossbeam 704, a cylinder is provided at the bottom of the paper beating paper base, and a paper beating paper 703 for beating the product 800 neatly is provided at the output end of the cylinder; a rear baffle 702 is provided on the material receiving table 701 to prevent the product 800 from rushing out of the material receiving table 701; a lifting component for lifting the material receiving table 701 is provided on the material receiving frame.

[0060] like Fig.13 and Fig.14 As shown, the lifting mechanism includes a motor 903 and two groups of lifting components, and the motor 903 drives one group of lifting components to work; the lifting components respectively include a belt 902 and a slide rail assembly, the belt 902 is wound around and connected to a driving wheel and a driving wheel, and the driving wheels of the two groups of lifting components are connected through a synchronous shaft 901; the slide rail assembly includes a slidingly connected track 904 and a slider 905, the slider 905 is connected to the belt 902, and the belt 902 rotates to drive the slider 905 to rise and fall; the lifting mechanism also includes a limit mechanism, the limit mechanism includes a limit plug 907 and two limit sensors 906 distributed up and down; the two limit sensors 906 are respectively installed on the card issuing frame and the material receiving frame, and the limit plug 907 is installed on the loading plate 101 and the material receiving table 701.

[0061] The working process of the lifting mechanism 900 is as follows: the motor 903 drives the driving wheel of the left lifting component to rotate, driving the belt 902 to rotate, so that the slider 905 moves up and down along the track 904, thereby driving the loading plate 101 or the receiving table 701 to move up and down; a limit mechanism is set, and the limit plug 907 cooperates with the two limit sensors 906 respectively to prevent the loading plate 101 or the receiving table 701 from exceeding the limit during the upward or downward process.

[0062] The specific working process of this silk screen product detection device is as follows:

[0063] Step S1, card issuance, the material carrier 101 is manually loaded, and then the lifting mechanism 900 drives the material carrier 101 to move up to the target position, the suction cup assembly 104 absorbs the first product 800, and the transplanting assembly 103 drives the suction cup assembly 104 to move forward, separates the products 800 one by one and transports them to the pre-acceleration mechanism 200. While the suction cup assembly 104 transplants the products 800, the lifting mechanism 900 synchronously drives the material carrier 101 to move up;

[0064] Step S2, pre-acceleration, the suction belt conveys the product 800, so as to increase the transmission speed of the product 800;

[0065] Step S3, inspection, the product 800 passes through the first light source 301, the second light source 302 and the third light source 303 in sequence, the first light source 301 and the third light source 303 provide light to the upper surface of the product 800, the second light source 302 provides light to the lower surface of the product 800, the first camera 304, the second camera 305 and the third camera 306 respectively pass through the first inspection area 308, the second inspection area 309 and the third inspection area 310, and visually inspect the product 800, and transmit the inspection results to the controller;

[0066] Step S4, transporting, the transport mechanism 400 transports the inspected product, and the suction belt of the transport mechanism 400 ensures that the product 800 is transported smoothly without displacement;

[0067] Step S5, rejecting: according to the detection result of the detection mechanism 300, if the product is good, the reject flap 501 does not flip over and remains horizontally set to ensure that the good product enters the good product transmission mechanism 600; if the product is bad, the reject driving mechanism works to drive the flip shaft 504 to rotate, thereby turning the reject flap 501 upward, forming a bad product channel between the reject flap 501 and the transmission mechanism 400, and the bad product enters the waste frame 503 after passing through the bad product channel and the reject guide plate 502;

[0068] Step S6, conveying good products, the multiple conveying belts 602 of the good product conveying mechanism 600 convey the products 800, and the good product pressing wheel assembly 604 improves the flatness of the products 800;

[0069] Step S7, vertical material collection, the product 800 enters the material collection platform 701, and the paper patting paper 703 pats both sides of the product 800 to make the product 800 collected neatly. At the same time, the lifting component drives the material collection platform 701 to descend, and the collection of good products is completed.

[0070] In summary, the present invention has a simple structure and a reasonable design. The printed materials are separated one by one by the card issuing mechanism 100, transmitted by the pre-acceleration mechanism 200, photographed by the detection mechanism 300, and defective products are rejected by the waste rejection mechanism 500, and good products are transmitted to the vertical material receiving mechanism 700 by the good product transmission mechanism 600. The detection accuracy is high and the detection speed is fast. The equipment runs smoothly and has a high degree of mechanization. While saving labor, the quality of the product can be improved.

[0071] The above description only describes the specific implementation mode of the present invention. Various examples do not limit the essential content of the present invention. After reading the description, ordinary technicians in the relevant technical field can modify or deform the specific implementation modes described above without departing from the essence and scope of the invention.

Claims

1. A screen printing product detection device, characterized in that: A card issuing mechanism (100), a pre-acceleration mechanism (200), a detection mechanism (300), a transmission mechanism (400), a waste rejection mechanism (500), a good product transmission mechanism (600) and a vertical material receiving mechanism (700) are sequentially arranged along the product (800) travel route; The detection mechanism (300) comprises a detection frame, on which a light source group and a camera group are arranged, and the camera group is arranged above the light source group; the light source group is provided with a first light source (301), a second light source (302) and a third light source (303) in sequence along the travel route of the product (800), the first light source (301) and the third light source (303) are arranged above the product (800), and the second light source (302) is arranged below the product (800); the camera group comprises a first camera (304) cooperating with the first light source (301), a second camera (305) cooperating with the second light source (302), and a third camera (306) cooperating with the third light source (303); a light shielding plate (307) is arranged above the second light source (302), and the light shielding plate (307) is arranged above the product (800); The first light source (301) is provided with a first detection area (308) for facilitating the first light source (301) to photograph, the shading plate (307) is provided with a second detection area (309) for facilitating the second camera (305) to photograph, and a third detection area (310) is provided on one side of the third light source (303) for facilitating the third camera (306) to photograph.

2. A screen printing product detection device according to claim 1, characterized in that: The detection frame is provided with a camera bracket (312) for installing a camera group, and the detection frame is also provided with a detection pressing wheel (312) for pressing the product (800).

3. A screen printing product detection device according to claim 1, characterized in that: The first light source (301) is a dome light source, the second light source (302) and the third light source (303) are both bar light sources; the first camera (304), the second camera (305) and the third camera (306) are all line scan cameras.

4. The screen printing product detection device according to claim 1, characterized in that: The card issuing mechanism (100) comprises a card issuing frame and a material carrier (101); a transplanting assembly (103) is arranged on the card issuing frame, the transplanting assembly (103) is located above the material carrier (101), and a suction cup assembly (104) is installed at the output end of the transplanting assembly (103); a baffle (102) is installed on the material carrier (101), and the baffle (102) is arranged relative to the suction cup assembly (104); The card issuing machine frame is provided with a lifting component for driving the material carrying plate (101) to move up and down.

5. A screen printing product detection device according to claim 4, characterized in that: A first crossbeam (105) is installed on the card issuing machine frame, a group of material blocking rod mounting seats are provided on the first crossbeam (105), a material blocking rod (106) is installed on the material blocking rod mounting seats, a long hole is provided on the material loading plate (101), two material blocking rods (106) are arranged through the long hole, and the two material blocking rods (106) are arranged on both sides of the product (800).

6. The screen printing product detection device according to claim 1, characterized in that: The second light source (302) is installed between the pre-acceleration mechanism (200) and the transmission mechanism (400); the transmission belts of the pre-acceleration mechanism (200) and the transmission mechanism (400) are suction belts; a pressing wheel assembly (201) is installed at the feeding end of the pre-acceleration mechanism (200), and a pressing wheel assembly (201) is installed at the discharging end of the transmission mechanism (400); The pre-acceleration mechanism (200) comprises a first anti-warping pressure wheel (202) and a second anti-warping pressure wheel (203) installed above the conveyor belt, and the second anti-warping pressure wheel (203) is arranged close to the side of the frame of the pre-acceleration mechanism (200).

7. The screen printing product detection device according to claim 1, characterized in that: The waste rejection mechanism (500) comprises a waste rejection flap (501) installed between the transmission mechanism (400) and the good product transmission mechanism (600); a waste frame (503) for collecting waste is provided below the good product transmission mechanism (600); a waste rejection guide plate (502) is installed at the feeding end of the waste frame (503); the waste rejection guide plate (502) and the waste frame (503) are both inclined and have the same inclination angle; the waste rejection flap (501) is installed with a turning shaft (504); and a waste rejection driving mechanism is connected to the turning shaft (504).

8. A screen printing product detection device according to claim 7, characterized in that: The good product transmission mechanism (600) comprises a good product transmission frame (603), on which an inclined support plate (601) and a plurality of transmission belts (602) are installed, and the plurality of transmission belts (602) are laid along the upper surface of the support plate (601); a good product pressure wheel assembly (604) is installed on the good product transmission frame (603), and the pressure wheel of the good product pressure wheel assembly (604) is arranged against the transmission belt (602); and an opening (605) is provided on the side plate of the good product transmission frame (603) for facilitating the removal of the waste frame (503).

9. The screen printing product detection device according to claim 1, characterized in that: The vertical material receiving mechanism (700) comprises a material receiving frame and a material receiving platform (701); the material receiving frame is provided with a second crossbeam (704) located above the material receiving platform (701); the second crossbeam (704) is provided with two paper slapping bases; a cylinder is provided at the bottom of the paper slapping bases; a paper slapping (703) for slapping the products (800) neatly is provided at the output end of the cylinder; the material receiving platform (701) is provided with a rear baffle (702) for preventing the products (800) from rushing out of the material receiving platform (701); The material receiving machine frame is provided with a lifting component for lifting the material receiving platform (701).

10. A method for detecting silk-screen products, characterized in that: The detection method adopts the screen printing product detection device according to any one of claims 1 to 9, and specifically comprises the following steps: Step S1, issuing cards, the suction cup assembly (104) absorbs the product (800), the transplanting assembly (103) drives the suction cup assembly (104) to move forward, separates the products (800) one by one and sends them to the pre-acceleration mechanism (200), and at the same time, the lifting mechanism (900) synchronously drives the carrier plate (101) to move upward; Step S2, pre-acceleration, the suction belt of the pre-acceleration mechanism (200) conveys the product (800) to increase the transmission speed of the product (800); Step S3, detection, the product (800) passes through the first light source (301), the second light source (302) and the third light source (303) in sequence, the first light source (301) and the third light source (303) provide light to the upper surface of the product (800), the second light source (302) provides light to the lower surface of the product (800), the first camera (304), the second camera (305) and the third camera (306) respectively pass through the first detection area (308), the second detection area (309) and the third detection area (310), and visually inspect the product (800), and transmit the inspection results to the controller; Step S4, transporting, the transport mechanism (400) transports the inspected product, and the suction belt of the transport mechanism (400) ensures that the product (800) is transported smoothly without displacement; Step S5, rejecting, according to the detection result of the detection mechanism (300), if the product is good, the rejecting flap (501) does not turn over, ensuring that the good product enters the good product transmission mechanism (600); if the product is bad, the rejecting driving mechanism works, the rejecting flap (501) turns upward, and the bad products are collected in the waste frame (503); Step S6, conveying good products, a plurality of conveying belts (602) of the good product conveying mechanism (600) convey the products (800), and the good product pressing wheel assembly (604) improves the flatness of the products (800); Step S7, vertical material collection, the product (800) enters the material collection platform (701), the paper plate (703) beats the two sides of the product (800), so that the product (800) is collected neatly, and at the same time the lifting component drives the material collection platform (701) to descend, completing the collection of good products.

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