Plastic full bottle color sorting device capable of automatically preventing materials from being stuck

Abstract

The utility model discloses a plastic full bottle color sorting device capable of automatically preventing materials from being stuck. The device comprises a conveying belt, an image assembly, a spray valve assembly, a photoelectric switch, a PLC (Programmable Logic Controller) and at least two groups of linear modules, the guide rail is additionally arranged at the bottom of the spray valve box body, the opposite-type photoelectric switches are additionally arranged on the two sides of the conveying belt, when a plastic bottle is clamped in the middle of a gap between the spray valve box body and the roller, a photoelectric switch sensor feeds back a signal to the PLC, the PLC controls the servo motor to rotate, the servo motor drives the roller lead screw to rotate, and the roller lead screw drives the conveying belt to rotate. The spraying valve box body is driven to move forwards, a gap between the spraying valve box body and the roller is increased, a clamped plastic bottle directly falls off under the action of gravity, meanwhile, after the control panel receives a material clamping signal, the delay time of blowing of the spraying valve is synchronously adjusted, the time difference among industrial camera shooting, signal transmission and spraying valve working is matched, and therefore the spraying valve box body is made to move forwards. And the whole color sorting process is not stopped, and the use efficiency of the color sorter is improved.

Description

Technical Field

[0001] This utility model relates to the field of color sorting technology for plastic bottles, and in particular to an automatic anti-jamming plastic full-bottle color sorting device. Background Technology

[0002] Color sorters, as high-performance plastic bottle sorting equipment, are widely used in food processing, ore sorting, and plastic sorting industries. Generally, to improve output and efficiency, the conveyor belt rotates at a high speed, reaching a maximum speed of about 4 m / s. Round or irregularly shaped plastic bottles spend very little time on the conveyor belt. To stabilize the bottles on the conveyor belt for a short period, ribs need to be added to the belt surface, resulting in a gap between the conveyor belt and the spray valve housing. In actual production, due to the flattening and deformation of the plastic bottles, significant differences in shape occur. Some broken bottles easily become stuck between the spray valve housing and the rollers and cannot fall. When a bottle gets stuck between the spray valve housing and the rollers... When a bottle is stuck in a gap and cannot fall, it can cause wear on the conveyor belt surface and even splitting. On the other hand, if the stuck bottle protrudes too high above the conveyor belt, it will collide with the bottles being transported on the conveyor belt, causing a change in position and resulting in inaccurate color sorting, which seriously affects the color sorting accuracy of the machine. The general solution is to rotate the spray valve box to increase the gap between the spray valve box and the roller, so that the bottle falls down under the action of gravity, thus solving the problem of jamming. However, this method needs to be performed when the customer has stopped the machine. Otherwise, the position of the spray valve installed on the spray valve box will be changed, which will change the delay time required for the spray valve to work, seriously affecting the color sorting accuracy.

[0003] Patent document No. 202211627087.6 discloses a bottle sorting machine that facilitates the trajectory control of round bottles, relating to the field of sorting machine technology. Its solution uses an acceleration arc to give the plastic bottle an initial velocity, thereby reducing the acceleration time of the plastic bottle and shortening the stabilization time on the conveyor belt; the added vertical rib units on the conveyor belt, with grooves between the rib units, can hold the plastic bottle in the middle, effectively avoiding airflow disturbance to the plastic bottle. However, it also has the problem of not being able to automatically handle jamming, resulting in low color sorting efficiency. Utility Model Content

[0004] To address the aforementioned problems, the purpose of this utility model is to provide an automatic anti-jamming plastic bottle color sorting device, which can automatically handle jammed materials without stopping the machine when the color sorter jams.

[0005] The objective of this utility model can be achieved through the following technical solution: an automatic anti-jamming plastic bottle color sorting device, comprising:

[0006] Conveyor belt, conveying plastic bottles to be color sorted at a uniform speed;

[0007] The image component acquires images of plastic bottles on the conveyor belt, performs image processing, and sends the image processing information to the PLC controller.

[0008] The spray valve assembly includes a spray valve housing and multiple spray valves. The spray valve housing controls the spray valves to perform color sorting on plastic bottles thrown off the conveyor belt according to the instructions of the PLC controller.

[0009] The photoelectric switch senses the plastic bottle stuck between the spray valve housing and the conveyor belt, and sends the jamming signal to the PLC controller.

[0010] At least two linear modules are provided, which are located at the bottom of the spray valve housing and drive the spray valve housing to move horizontally according to the instructions of the PLC controller.

[0011] Optionally, the linear module includes a base, a lead screw nut, a roller lead screw, a coupling, and a servo motor;

[0012] The lead screw nut is connected to the bottom surface of the spray valve housing, the roller lead screw is rotatably connected to the base, the roller lead screw is driven by a servo motor through a coupling, the lead screw nut and the roller lead screw form a lead screw pair, and the servo motor is electrically connected to a PLC controller.

[0013] Optionally, the photoelectric switches are in two sets.

[0014] Optionally, the surface of the conveyor belt is provided with anti-slip ribs.

[0015] Optionally, the imaging components include a darkroom, an industrial camera, a light source, and a host computer.

[0016] The dark box has an opening that is close to the conveyor belt and does not affect the conveyor belt's transport of plastic bottles. An industrial camera is installed at the top center of the dark box, and a light source provides illumination for the interior of the dark box. The industrial camera captures images and sends them to a host computer for processing.

[0017] Optionally, the image processing information includes target plastic bottle category information and positioning information. The host computer generates a valve selection signal based on the positioning information, generates a spray signal and pulse meter count based on the target plastic bottle category information, and sends the valve selection signal, pulse meter count, and spray signal to the PLC controller.

[0018] The beneficial effects of this utility model are:

[0019] 1. This utility model adds a guide rail to the bottom of the spray valve box and photoelectric switches to both sides of the conveyor belt. When a plastic bottle is stuck in the gap between the spray valve box and the roller, the photoelectric switch sensor feeds a signal to the PLC controller. The PLC controller controls the servo motor to rotate, which drives the roller screw to rotate, thereby moving the spray valve box forward and increasing the gap between the spray valve box and the roller. This causes the previously stuck plastic bottle to fall directly under gravity. At the same time, after receiving the jamming signal, the control board synchronously adjusts the delay time of the spray valve to match the time difference between industrial camera shooting, signal transmission and spray valve operation, so that the entire color sorting process does not stop and improves the efficiency of the color sorter.

[0020] 2. The image assembly of this utility model includes a dark box with an opening at the bottom and closed sides. The opening of the dark box is as close as possible to the conveyor belt surface, but without affecting the conveyor belt's transport of plastic bottles, so as to minimize the amount of external light entering the dark box. The light source is an LED light strip, which is symmetrically installed on the four sides of the inside of the dark box. While providing a light source for the industrial camera, it avoids the light source shining on the target plastic bottle and producing shadows. The inner wall of the dark box is coated with an anti-reflective black matte coating to reduce the light spots caused by the light source refracting onto the target plastic bottle and improve the image acquisition quality.

[0021] 3. This utility model reasonably adjusts the acquisition cycle of the industrial camera, which can ensure the integrity of the target plastic bottle acquired by the industrial camera and further improve the accuracy of image recognition. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of an automatic anti-jamming plastic bottle color sorting device according to the present invention;

[0023] Figure 2 This is a top view schematic diagram of the general structure of an automatic anti-jamming plastic bottle color sorting device according to this utility model;

[0024] Figure 3 This is a schematic diagram of the signal processing of an automatic anti-jamming plastic bottle color sorting device according to the present invention;

[0025] Figure 4 This is a schematic diagram of the image component structure of this utility model;

[0026] Figure 5 This is a schematic diagram of the structure for the host computer to acquire the pulse meter count of this utility model;

[0027] Figure 6 This is a schematic diagram of the image processing flow of this utility model.

[0028] 100. Conveyor belt; 110. Anti-slip ribs; 120. Friction rollers; 130. Rollers;

[0029] 200. Image processing unit; 210. Dark box; 220. Industrial camera; 230. Light source; 240. Host computer;

[0030] 300. Spray valve assembly; 310. Spray valve housing; 320. Spray valve;

[0031] 400. Photoelectric switch;

[0032] 500. Linear module; 510. Base; 520. Lead screw and nut; 530. Roller lead screw; 540. Coupling; 550. Servo motor;

[0033] 600, PLC controller. Detailed Implementation

[0034] The embodiments of this utility model are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0035] To ensure the sorting accuracy of this device and maintain continuous operation without stopping, it is necessary to avoid overlapping of bottles when they reach the recognition area. Therefore, before using this device, a vibrating hopper is used to disperse and separate the plastic bottles. By adjusting the size and height of the vibrating hopper outlet and the width of the conveyor belt, the plastic bottles can enter the image recognition area individually and maintain a relatively uniform distribution, thus greatly improving the accuracy of recognition and sorting.

[0036] To ensure both the sorting speed and accuracy of this device, the spray valve separation device responsible for sorting plastic bottles is designed at the end of the conveyor belt 100. This increases the effective area of ​​the spray valve separation device, allowing it to sort only one color of plastic bottle per operation. Through cyclical operation, all colors of plastic bottles can be sorted, improving sorting accuracy and reducing missed bottles.

[0037] like Figure 1 As shown, this utility model discloses an automatic anti-jamming plastic bottle color sorting device, comprising:

[0038] The plastic bottles to be sorted are conveyed at a constant speed by the conveyor belt 100. Anti-slip ribs 110 can be set on the surface of the conveyor belt 100 to reduce the sliding of the plastic bottles on the conveyor belt 100 and improve the detection accuracy. The plastic bottles move at a constant speed with the conveyor belt 100 and are thrown out in a parabola at the end of the conveyor belt 100. The spray valve 320 corresponding to the throw position of the target plastic bottle is driven to spray gas. The gas blows the target plastic bottle, causing it to fly out and fall into the sorting area. Other plastic bottles that are not sorted fall in a parabola into the return area for the next color sorting.

[0039] The image component 200 is mainly used to acquire images of plastic bottles on the conveyor belt 100, perform image processing, and send the image processing information to the PLC controller 600.

[0040] This utility model device is based on machine vision and image recognition technology to identify target plastic bottles from acquired images. The imaging effect directly determines the accuracy of the recognition. To avoid light spots and color shifts on the bottle body caused by moisture adhesion, this utility model will design the dark box 210 and the light source 230 to improve the image acquisition quality.

[0041] Image assembly 200 includes components such as dark box 210, industrial camera 220, light source 230, and host computer 240, etc. Figure 4 As shown, the bottom of the dark box 210 is open, while the other sides are closed. The opening of the dark box 210 is as close as possible to the conveyor belt 100, but without affecting the conveyor belt 100's transport of plastic bottles, so that the minimum amount of external light enters the dark box 210. The light source 230 can be an LED light strip, which is symmetrically installed on the four sides of the inner side of the dark box 210. While providing a light source for the industrial camera 220, it avoids the light source shining on the target plastic bottle and creating shadows. At the same time, in order to reduce the light spots generated by the refraction of the light source 230 on the target plastic bottle, the inner wall of the dark box 210 can be coated with an anti-reflective black matte paint.

[0042] The above processing can greatly reduce the interference of external lighting changes on image quality and improve image acquisition quality.

[0043] An industrial camera 220 is installed at the top center of the dark box 210. A light source 230 provides illumination for the interior of the dark box 210. The industrial camera 220 captures images and sends them to the host computer 240 for processing. After processing, the target plastic bottle category information and positioning information can be obtained. The target plastic bottle category information is mainly used to determine whether the target plastic bottle is a plastic bottle that needs color sorting. A spray signal is generated based on the target plastic bottle category information. The positioning information is used to determine the position coordinates of the target plastic bottle on the conveyor belt 100. Based on the position information, the valve selection signal and pulse count can be determined. The PLC controller 600 counts pulses using a photoelectric encoder. The host computer 240 sends the valve selection signal, spray signal, and pulse count to the PLC controller 600.

[0044] The structure of the injection valve assembly 300 is as follows: Figure 1 , 2 As shown, it mainly includes a spray valve housing 310 and multiple spray valves 320. The spray valve housing 310 is slidably mounted on two sets of linear modules 500 and can be translated along the linear modules 500 under the drive of the linear modules 500.

[0045] The structure of the linear module 500 is as follows: Figure 1 As shown, each linear module 500 includes components such as a base 510, a lead screw nut 520, a roller lead screw 530, a coupling 540, and a servo motor 550.

[0046] The lead screw nut 520 is connected to the bottom surface of the spray valve housing 310, and the roller lead screw 530 is rotatably connected to the base 510. The roller lead screw 530 is driven by the servo motor 550 through the coupling 540. The lead screw nut 520 and the roller lead screw 530 form a lead screw pair. The servo motor 550 is electrically connected to the PLC controller 600.

[0047] The photoelectric switch 400 can sense the plastic bottles stuck between the spray valve box 310 and the conveyor belt 100. The photoelectric switch 400 sends the jamming signal to the PLC controller 600. The photoelectric switch 400 can be a through-beam photoelectric switch 400. In the jamming area, a set of photoelectric switches 400 is set at the top and bottom to achieve full coverage of the entire jamming area.

[0048] When a jam occurs, the plastic bottle gets stuck in the gap between the spray valve housing 310 and the conveyor belt 100 roller 130 and cannot fall. The photoelectric switch 400 can sense the stuck plastic bottle and send the jam signal to the PLC controller 600. The PLC controller 600 issues a control command to control the two sets of servo motors 550 to move synchronously, driving the spray valve housing 310 to move horizontally, widening the space between the spray valve housing 310 and the conveyor belt 100 roller 130, so that the stuck plastic bottle can fall and the jam is eliminated.

[0049] After the jam is cleared, the distance between the spray valve housing 310 and the conveyor belt 100 changes. The PLC controller 600 increases the pulse count according to the jam signal, delays the count of the color sorting time of the spray valve 320, and adjusts the spraying time of the spray valve 320 to maintain the precise spraying and sorting of the spray valve 320.

[0050] Using the aforementioned color sorting device, this utility model also discloses an automatic anti-jamming method for color sorting all plastic bottles, comprising the following steps:

[0051] S1. The plastic bottles to be sorted are conveyed at a constant speed by the conveyor belt 100. The plastic bottles follow the conveyor belt 100 at a constant speed and are thrown out in a parabolic shape at the end of the conveyor belt 100. The spray valve 320 corresponding to the throwing position of the target plastic bottle is driven to spray gas, and the target plastic bottle is blown out by the gas, so that the target plastic bottle flies out and falls into the sorting area. Other plastic bottles that do not participate in the sorting enter the return area for the next color sorting.

[0052] S2. Use image component 200 to acquire images of plastic bottles on conveyor belt 100, perform image processing, and send the image processing information to PLC controller 600. Specifically, the image processing flow is as follows: Figure 3 As shown, it includes:

[0053] S21. Adjust the acquisition cycle of the industrial camera, capture images according to the acquisition cycle, and send them to the host computer 240.

[0054] The industrial camera 220 needs to capture images of the entire plastic bottle for optimal system performance. Therefore, to reduce the number of incomplete bottle images captured by the industrial camera 220, the shooting interval needs to be optimized.

[0055] The acquisition cycle of an industrial camera can be obtained using the following formula:

[0056] (W+w) / 2s≤t≤(W+w) / s

[0057] Where W is the opening width of the dark box 210, w is the average width of the target plastic bottle, and s is the conveyor belt speed 100. An average value can be obtained by measurement based on the length and width of the target plastic bottle. W, the opening width of the dark box 210, can be considered as the recognition area. The maximum time for the target plastic bottle to pass through the recognition area can be (W+w) / s. Using the maximum time, the plastic bottle can be captured, but incomplete images of the bottle may appear. The minimum time can be (W+w) / 2s, which can ensure that the complete image of the bottle can be captured within the recognition area. Reasonably setting the interval of the industrial camera's acquisition cycle can ensure the integrity of the target plastic bottle captured by the industrial camera.

[0058] S22, the host computer 240 performs distortion correction and color balance preprocessing on the image; such as Figure 6 As shown, after the industrial camera 220 acquires the image, it sends it to the host computer 240. The host computer 240 first performs distortion correction and color balance processing, and then identifies and locates the target plastic bottle in the image.

[0059] S23. Perform target plastic bottle category identification and location, and obtain target plastic bottle category information and location information.

[0060] In the images captured by the industrial camera 220, the host computer 240 uses a recognition algorithm to detect the target plastic bottle that needs to be separated. If the confidence level of the target plastic bottle is higher than a threshold, the image is considered a valid image; if no target plastic bottle is detected or the confidence level of the target plastic bottle is lower than the threshold, the image is considered invalid. For valid images, the category and location information of the target plastic bottle can be obtained through recognition calculations.

[0061] S24, the host computer 240 determines the valve selection signal and pulse meter quantity based on the positioning information, generates the injection signal based on the target plastic bottle type information, and sends the valve selection signal, pulse meter quantity and injection signal to the PLC controller 600.

[0062] S3. Use photoelectric switch 400 to sense the plastic bottle stuck between the spray valve box 310 and the conveyor belt 100, and send the stuck signal to PLC controller 600.

[0063] The photoelectric switch 400 can sense the plastic bottles stuck between the spray valve box 310 and the conveyor belt 100. The photoelectric switch 400 sends the jamming signal to the PLC controller 600. The photoelectric switch 400 can be a through-beam photoelectric switch 400. In the jamming area, a set of photoelectric switches 400 is set at the top and bottom to achieve full coverage of the entire jamming area.

[0064] S4, PLC controller 600 generates control commands based on image processing information and jamming signals. The control commands drive the spray valve housing 310 to move and eliminate jamming. At the same time, the spray valve 320 controls the plastic bottles thrown off the conveyor belt 100 for color sorting.

[0065] The image processing information includes target plastic bottle type information and positioning information. The host computer 240 generates a valve selection signal and pulse meter count based on the positioning information, generates a spray signal based on the target plastic bottle type information, and sends the valve selection signal, pulse meter count and spray signal to the PLC controller 600.

[0066] The PLC controller 600 generates control commands, including:

[0067] S41, PLC controller 600 selects spray valve 320 according to the valve selection signal, such as Figure 2As shown, the spray valves 320 are installed on the spray valve housing 310 and are evenly spaced. The host computer 240 can determine the position of the target plastic bottle based on the positioning information, thereby determining the position information of the corresponding spray valve 320, and sending the valve selection signal to the PLC controller 600.

[0068] S42. Generate a displacement command based on the jam signal and send it to the servo motor 550. At the same time, count the pulses of the injection signal based on the jam signal and the pulse counter count.

[0069] When there is no material block, such as Figure 5 As shown, the conveyor belt 100 runs, driving the friction roller 120 to rotate. The shaft of the friction roller 120 is directly connected to the photoelectric encoder, and the two rotate synchronously.

[0070] After acquiring the location and category information of the target plastic bottle, the host computer 240 can calculate the distance between the target plastic bottle and the corresponding pneumatic spray valve 320. By measuring the rotation angle of the photoelectric encoder, the number of pulses counted by the photoelectric encoder when the plastic bottle reaches the spray valve 320 can be calculated.

[0071] The formula for the number of pulse counters is:

[0072] θ=L / R

[0073]

[0074] Where L is the distance between the target plastic bottle and the corresponding pneumatic spray valve 320, R is the radius of the friction roller 120, θ is the rotation angle generated by the photoelectric encoder when the target plastic bottle moves forward L, and A is the number of pulses generated by the photoelectric encoder in one revolution.

[0075] S43. When the pulse count reaches its limit, the solenoid valve is opened to control the selected spray valve 320 for color sorting; the PLC controller 600 times the pulse count and the jamming signal, controls the opening and closing of the solenoid valve, and performs color sorting and separation on the target plastic bottle.

[0076] When there is no jamming, when the number of pulses counted by the PLC controller 600 reaches P, it means that the target plastic bottle has reached the action center of the corresponding spray valve 320. At this time, the PLC controller 600 controls the solenoid valve of the spray valve 320 to open and spray, completing the sorting of the target plastic bottle.

[0077] When a jam occurs, the PLC controller will add the number of pulses increased by the displacement of the spray valve when counting the pulses.

[0078] S44. After color selection, instruct servo motor 550 to return to its original position.

[0079] This invention adds a guide rail to the bottom of the spray valve housing 310 and through-beam photoelectric switches 400 to both sides of the conveyor belt 100. When a plastic bottle is stuck in the gap between the spray valve housing 310 and the roller 130, the photoelectric switch sensor feeds a signal to the PLC controller. The control board sends a signal to control the servo motor 550 to rotate. The servo motor 550 drives the roller screw 530 to rotate, thereby moving the spray valve housing 310 forward and increasing the gap between the spray valve housing 310 and the roller 130. This causes the previously stuck plastic bottle to fall directly under gravity. At the same time, after receiving the signal of the stuck material, the control board synchronously adjusts the delay time of the spray valve to match the time difference between the industrial camera shooting, signal transmission and spray valve operation, so that the entire color sorting process remains unchanged and the color sorting effect is not affected.

[0080] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

[0081] It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0082] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0083] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0084] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

Claims

1. An automatic anti-jamming plastic bottle color sorting device, characterized in that, include: Conveyor belt (100) conveys plastic bottles to be sorted at a uniform speed; The image component (200) acquires images of plastic bottles on the conveyor belt (100), performs image processing, and sends the image processing information to the PLC controller (600). The spray valve assembly (300) includes a spray valve housing (310) and a plurality of spray valves (320), wherein the spray valve housing (310) controls the spray valves (320) to perform color sorting on plastic bottles dropped from the conveyor belt (100) according to the instructions of the PLC controller (600); A photoelectric switch (400) senses the plastic bottle stuck between the spray valve housing (310) and the conveyor belt (100) and sends a jamming signal to the PLC controller (600). At least two linear modules (500) are provided, which are located at the bottom of the spray valve housing (310) and drive the spray valve housing (310) to move according to the instructions of the PLC controller (600).

2. The automatic anti-jamming plastic bottle color sorting device according to claim 1, characterized in that, The linear module (500) includes a base (510), a lead screw nut (520), a roller lead screw (530), a coupling (540), and a servo motor (550); The lead screw nut (520) is connected to the bottom surface of the spray valve housing (310), the roller lead screw (530) is rotatably connected to the base (510), the roller lead screw (530) is driven by the servo motor (550) through the coupling (540), the lead screw nut (520) and the roller lead screw (530) form a lead screw pair, and the servo motor (550) is electrically connected to the PLC controller (600).

3. The automatic anti-jamming plastic bottle color sorting device according to claim 1, characterized in that, The photoelectric switch (400) consists of two sets.

4. The automatic anti-jamming plastic bottle color sorting device according to claim 1, characterized in that, The surface of the conveyor belt (100) is provided with anti-slip ribs (110).

5. The automatic anti-jamming plastic bottle color sorting device according to claim 1, characterized in that, The image assembly (200) includes a darkroom (210), an industrial camera (220), a light source (230), and a host computer (240). The opening of the dark box (210) is close to the conveyor belt (100) and does not affect the conveyor belt (100) from transporting plastic bottles. The industrial camera (220) is installed at the center of the top of the dark box (210). The light source (230) provides illumination for the inside of the dark box (210) to collect images. The industrial camera (220) collects images and sends them to the host computer (240) for processing.

Images