Method for automatically analyzing and screening flaws of online resin particles

Abstract

The invention discloses a method for automatically analyzing and screening flaws of online resin particles. Comprising the steps that granules are placed at an upper end opening of a discharging mechanism, and the granules fall into a conveying mechanism after coming out of a lower end opening of the discharging mechanism; the conveying mechanism conveys the granules until the granules are conveyed to a feeding port of the granule detection mechanism, and the overflow detection mechanism detects whether the granules on the conveying mechanism overflow or not in real time; the granules do parabolic motion in the granule detection mechanism, and the granule detection mechanism performs image acquisition on the falling granules in real time and transmits the acquired image to the control module in real time for processing; and when the granules fall to the lower end of the removing mechanism, the removing mechanism performs removing treatment on the granules according to the treatment result of the control module. According to the method, conveying, defect detection and rejection are integrated, defective granules are automatically analyzed and screened, and the method has the advantages of being efficient, stable and reliable.

Description

Technical Field

[0001] This invention belongs to the field of resin particle defect detection, and specifically relates to an online automatic analysis and screening method for resin particle defects. Background Technology

[0002] With the increasing demands for high-performance polymer materials in the automotive, electronics, and medical industries, the purity of resin particles has become a key indicator of downstream product quality. For example, discolored impurities in resins such as ABS and PP can lead to surface defects or decreased mechanical properties in injection-molded products.

[0003] Currently, the industry generally relies on manual visual inspection or offline sampling inspection, which suffers from low efficiency (only a few hundred grams can be inspected per hour), high false negative rate (especially for micro-defects <0.1mm), and rising labor costs. Especially for high-end products, which require full inspection, manual and offline inspection methods are clearly insufficient.

[0004] During the production of granules, issues with raw materials, including unclean foreign objects, color masterbatch, or spotted crushed material chunks and debris, can lead to black spot impurities in the granules. Secondly, during the processing and granulation process, incomplete equipment cleaning or improper operation, as well as tool wear, can cause impurities to mix into the granules. Furthermore, environmental factors, such as dust and sand particles, can also contribute to the granules. In particular, poor workshop cleanliness and insufficient raw material pretreatment and cleaning can result in granules with high dust content.

[0005] The impurities generated by these various methods directly lead to a decline in product quality and unstable performance. Impurities in raw materials may cause incomplete reactions, affecting the purity and quality of the target product. Furthermore, impurities accumulating, jamming, and clogging inside equipment can lead to decreased equipment performance and even sudden malfunctions. These problems inevitably increase production costs and reduce production efficiency. In today's fiercely competitive market, improving product quality and production efficiency is crucial for a company's survival. Summary of the Invention

[0006] To address the problems existing in the background technology, this invention provides an online automatic analysis and screening method for resin particle defects, which solves the technical problems of low efficiency, high false negative rate, and rising labor costs in existing detection technologies.

[0007] In response to current testing needs, this invention proposes an automated analysis and screening method to better detect defects in granules and separate defective granules. This method improves product quality, enhances quality control, helps companies reduce costs, increases production efficiency, and enables companies to monitor product quality in real time, thus demonstrating promising market prospects.

[0008] The technical solution adopted in this invention is: The automatic online analysis and screening method for resin particle defects of the present invention includes the following steps: S1. Place the granules into the upper port of the feeding mechanism of the automatic analysis and screening device. After the granules come out from the lower port of the feeding mechanism, they fall into the conveying mechanism of the automatic analysis and screening device. S2. The conveying mechanism conveys the granules until they reach the feed inlet of the granule detection mechanism of the automatic analysis and screening device, and the overflow detection mechanism of the automatic analysis and screening device detects in real time whether the granules on the conveying mechanism overflow. S3. The pellets undergo parabolic motion within the pellet detection mechanism. The pellet detection mechanism acquires images of the falling pellets in real time and transmits the acquired images to the control module of the automatic analysis and screening device for processing. S4. When the granules fall to the lower end of the rejection mechanism of the automatic analysis and screening device, the rejection mechanism will decide whether to reject the granules based on the result of the control module.

[0009] Specifically, step S4 is as follows: when the granules fall to the rejection mechanism, if the control module determines that the granules are non-defective, no processing is performed and the granules fall into the granule bin for collection; if the control module determines that the granules are defective, the control module controls the rejection mechanism to reject the defective granules into the waste bin for collection.

[0010] Further, step S4 is more specifically as follows: when the granules fall to the pick-off plate of the rejection mechanism, if the control module determines that they are non-defective granules, no processing is performed, and the granules fall into the granule bin for collection; if the control module determines that they are defective granules, the control module obtains and processes multiple images to determine which pick-off plate the falling granules will pass over, thereby controlling the solenoid valve island corresponding to the pick-off plate. By controlling the corresponding solenoid valve island, the cylinder's telescopic rod extends, the telescopic rod drives the pull rod, and the pull rod drives the upper end of the pick-off plate to press down, thereby causing the spring connected to the lower end of the pick-off plate to spring up. The spring then hits the defective granules, causing them to be ejected into the waste bin for collection.

[0011] The automatic analysis and screening device includes a frame and a feeding mechanism, a conveying mechanism, an overflow detection mechanism, a particle detection mechanism, and a rejection mechanism mounted on the frame. The frame is arranged on the ground. Particles are fed into the upper port of the feeding mechanism, and after passing through the feeding mechanism, they fall into the conveying mechanism from the lower port. The conveying mechanism conveys the particles to the inlet of the particle detection mechanism. After being detected by the particle detection mechanism, the particles exit from the outlet of the particle detection mechanism. The rejection mechanism rejects defective particles in real time based on the detection results. The overflow detection mechanism is arranged above the conveying mechanism to determine in real time whether there is any overflow of particles conveyed by the conveying mechanism.

[0012] The feeding mechanism includes a feed pipe, a vibrator, a guide chute, a second static eliminator, a vibrator hopper, a shock absorber, a cantilever frame, and a top cover plate. The top cover plate is fixedly installed on the frame. The feed pipe passes vertically through a circular hole in the top cover plate and is fixedly connected to the top cover plate. The cantilever frame is fixedly installed on the lower surface of the top cover plate. The vibrator hopper and the guide chute are fixedly installed on the lower surface of the cantilever frame. The granules are fed into the upper port of the feed pipe. The lower port of the feed pipe is connected to one end of the vibrator hopper. The other end of the vibrator hopper is connected to the inlet of the guide chute. The outlet of the guide chute is aligned with the conveying structure. The vibrator is installed upside down on the lower surface of the top cover plate via the shock absorber. The second static eliminator is fixedly installed at the outlet of the guide chute.

[0013] The overflow detection mechanism includes a position sensor, a fixed plate, a swing plate, a rotating seat, a rotating shaft, and a support base. The fixed plate is vertically fixed on the frame and is installed above the conveying mechanism. The horizontal arrangement direction of the fixed plate is perpendicular to the conveying direction of the conveying mechanism. A support base is installed on each of the two lower ends of the fixed plate, and a rotating shaft is horizontally fixed between the two support bases. A rotating seat is fixedly installed in the middle of the swing plate, and the rotating seat is sleeved on the outer circumference of the rotating shaft, so that the rotating seat and the swing plate rotate around the rotating shaft. A position sensor is also installed on the fixed plate, which is used to measure the distance from the upper end of the swing plate.

[0014] The conveying mechanism includes a conveyor frame, an electric roller, a belt, side guards, a driven roller, and a support frame. A track is placed on the ground, and the support frame is slidably mounted on the track by a slider. A slide rail is provided at the upper end of the support frame, and the conveyor frame is slidably mounted on the slide rail of the support frame by a slider. An electric roller and a driven roller are respectively arranged at both ends of the conveying direction of the conveyor frame. The belt is tumblingly connected to the electric roller and the driven roller respectively. The rolling of the electric roller drives the belt to convey, and the belt in turn drives the rolling of the driven roller. Side guards are installed on both sides of the conveyor frame in the conveying direction. One end of the belt is arranged below the lower port of the feeding mechanism, and the other end of the belt is aligned with the feed port of the granule detection mechanism.

[0015] The granule detection mechanism includes a granule parabolic hopper, a background roller, a diffuse reflector, a distribution hopper, at least three vision detection modules, and several light sources. The distribution hopper consists of a waste hopper and a granule hopper, and is placed on the ground. The granule parabolic hopper is fixedly mounted on a frame. The inlet of the granule parabolic hopper is aligned with the outlet of the conveying mechanism that transmits granules, and the outlet of the granule parabolic hopper is aligned with the granule hopper of the distribution hopper. A parabolic flow channel is formed inside the granule parabolic hopper, and the granules coming out of the conveying mechanism undergo parabolic motion within the flow channel. The background roller is vertically installed in the upper part of the granule parabolic hopper, and the granules pass over the background roller when they fall in a parabolic trajectory. At least three vision detection ports are also provided in the upper part of the granule parabolic hopper, and a vision detection module is installed at each vision detection port. Each vision detection module captures images of the area where the background roller is located from different angles. Several light sources are installed inside the granule parabolic hopper. A diffuse reflector is also provided inside the granule parabolic hopper to diffusely reflect the light emitted by the light sources.

[0016] Each of the aforementioned vision inspection modules includes a cooling fan, a camera lens, a dustproof isolator, and an adjustment bracket; the adjustment bracket is installed on the granule parabolic hopper at the corresponding vision inspection port, and both the cooling fan and the camera lens are installed on the adjustment bracket, with the cooling fan positioned at the body end of the camera lens; the dustproof isolator is installed at the corresponding vision inspection port and forms a seal with the vision inspection port, and is positioned at the lens end of the camera lens, thereby isolating the camera lens from the parabolic flow path within the granule parabolic hopper; the camera lens is aimed at the area where the background roller is located to acquire images.

[0017] The dustproof isolator includes a handle outer plate, a dustproof support, and an optical glass cover. The dustproof support has a hollowed-out center, with one side of the hollowed-out area close to the lens end of the camera lens. The optical glass cover is sealed and installed on the other side of the hollowed-out area. The dustproof support also has a handle outer plate for easy handling of the dustproof isolator.

[0018] The rejection mechanism includes a first vertical plate, a second vertical plate, a fixed base, a rotating shaft, and several rejection components. Each rejection component includes a cylinder, a solenoid valve island, a paddle, a spring, and a pull rod. The fixed base is fixedly installed at the discharge port of the particle detection mechanism. The first and second vertical plates are vertically fixedly installed at the horizontal ends of the fixed base, respectively. A rotating shaft is horizontally fixed between the first and second vertical plates. Each paddle is vertically arranged, and each paddle has a circular hole at its upper part. The rotating shaft passes through the circular holes of each paddle, so that all paddles are arranged sequentially from one end to the other along the rotating shaft. It can rotate around a pivot axis; each paddle is equipped with a cylinder, the cylinder body is fixedly mounted on a fixed base, the piston rod of the cylinder is arranged vertically, one end of the piston rod is fixedly connected to a pull rod, and the other end of the pull rod is fixedly connected to the upper end of the paddle, so that the up and down extension and retraction of the piston rod drives the paddle to rotate around the pivot axis; each cylinder is also equipped with a solenoid valve island to control the cylinder; a spring is fixedly connected to the lower end of each paddle, and during the rotation of the paddle around the pivot axis, the spring can strike the granules, causing the granules to fall into the waste bin of the distribution hopper for collection.

[0019] The beneficial effects of this invention are: 1. This invention overcomes the problems of low efficiency, high false negative rate, and rising labor costs in existing technologies. Especially for high-end products requiring full inspection, manual and offline testing are clearly insufficient.

[0020] 2. This invention enables the acquisition of surface information of granules without blind spots, and uses this surface information to determine defects in the granules and remove defective granules.

[0021] 3. This invention is applicable to the detection of impurities in various transparent and semi-transparent granular products (PVC, PP, PE, etc.).

[0022] 4. The method of the present invention integrates conveying, defect detection and rejection, and automatically analyzes and screens defective granules, which has the advantages of high efficiency, stability and reliability. Attached Figure Description

[0023] Figure 1 This is a flowchart of the method of the present invention.

[0024] Figure 2 A three-dimensional view of the automatic analysis and screening device.

[0025] Figure 3 This is a front view of the automatic analysis and screening device without its outer casing.

[0026] Figure 4 A front view of the automatic analysis and screening device with its housing.

[0027] Figure 5This is a partial enlarged view of the feeding mechanism of the automatic analysis and screening device.

[0028] Figure 6 These are enlarged views of the overflow detection mechanism from two different perspectives.

[0029] Figure 7 These are enlarged views of the feeding mechanism from two different perspectives.

[0030] Figure 8 An enlarged view of the conveying mechanism of the automatic analysis and screening device.

[0031] Figure 9 This is an enlarged view of the particle detection mechanism of the automatic analysis and screening device.

[0032] Figure 10 Enlarged and disassembled diagram of the dustproof isolator of the automatic analysis and screening device.

[0033] Figure 11 These are magnified views of the rejection mechanism from two different perspectives.

[0034] Figure 12 This is a diagram showing the flow process of granular materials in an automatic analysis and screening device.

[0035] In the diagram: 1. Frame; 2. Feeding mechanism; 3. Overflow detection mechanism; 4. Conveying mechanism; 5. Particle detection mechanism; 6. Rejection mechanism; 7. Equipment interface; 8. Control module; 9. Emergency stop module; 10. Air-cooling system; 11. Sound and light module; 2.1. Feed pipe; 2.2. Vibrator; 2.3. Guide chute; 2.4. Static eliminator II; 2.5. Vibrator hopper; 2.6. Shock absorber seat; 2.7. Cantilever frame; 2.8. Top cover plate; 2.9. Guide chute mounting plate; 2.10. Static eliminator bracket; 2.11. Position sensor. 3.1 Fixed plate, 3.2 Swinging plate, 3.3 Rotating seat, 3.4 Rotating shaft, 3.5 Support seat, 3.6 Static eliminator, 3.7 Conveyor frame, 4.1 Electric roller, 4.2 Belt, 4.3 Side guard, 4.4 Driven roller, 4.5 Support frame, 4.6 Encoding wheel, 4.7 Dust hood, 4.8 Deviation detection device, 4.9 Limit block, 4.10 Side guard, 4.12 Negative pressure interface, 4.12 Diverter pipe, 4.13 Diverter valve, 4.14 Granule parabolic hopper, 5 5.1 Background rod 5.2 Diffuse reflector 5.3 Material distribution bin 5.4 Waste bin 5.4.1 Granule bin 5.4.2 Vision inspection module 5.5 Parabolic duct 5.6 Cooling fan 5.7 Camera lens 5.8 Dustproof isolator 5.9 Adjustment bracket 5.10 Dust blowing module 5.11 Light source three 5.12 Light source four 5.13 Light source six 5.14 Light source seven 5.15 Light source one 5.16 Light source two 5.17 Light source five 5.18 Handle 5.19 Outer panel, 5.20 Dustproof isolation support, 5.21 Dustproof pressure plate, 5.22 Optical glass, 5.23 Inner sealing plate, 6.1 First upright plate, 6.2 Second upright plate, 6.3 Fixed base, 6.4 Rotating shaft, 6.5 Cylinder, 6.6 Solenoid valve island, 6.7 Paddle, 6.8 Spring, 6.9 Pull rod, 6.10 Limiting post, 6.11 Cable connector, 7.1 Dust collection port one, 7.2 Dust collection port two, 7.3 Dust collection port three, 7.4 Dust collection box, 7.5 Negative pressure vacuum cleaner. Detailed Implementation

[0036] The present invention will now be described in more detail with reference to the accompanying drawings and embodiments. However, the present invention is not limited thereto. For those skilled in the art, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention. Contents not described in detail in this specification are prior art known to those skilled in the art.

[0037] like Figure 2 , Figure 3 and Figure 4As shown, the automatic analysis and screening device of this embodiment includes a frame 1 and a feeding mechanism 2, a conveying mechanism 4, an overflow detection mechanism 3, a granule detection mechanism 5, and a rejection mechanism 6 mounted on the frame 1. The frame 1 is placed on the ground. Granules are fed into the upper port of the feeding mechanism 2. After passing through the feeding mechanism 2 and exiting from the lower port, the granules fall onto the conveying mechanism 4. The conveying mechanism 4 conveys the granules to the inlet of the granule detection mechanism 5. After being detected by the granule detection mechanism 5, the granules exit from the outlet of the granule detection mechanism 5. The rejection mechanism 6 rejects defective granules in real time based on the detection results. The overflow detection mechanism 3 is arranged above the conveying mechanism 4 and determines in real time whether there is overflow of granules conveyed on the conveying mechanism 4. The granules are resin particles.

[0038] like Figure 5 and 7 As shown, the feeding mechanism 2 includes a feed pipe 2.1, a vibrator 2.2, a guide chute 2.3, an electrostatic eliminator 2.4, a vibrator hopper 2.5, a shock absorber 2.6, a cantilever frame 2.7, and an upper cover plate 2.8. The upper cover plate 2.8 is fixedly mounted on the frame 1. The feed pipe 2.1 vertically passes through a circular hole in the upper cover plate 2.8 and is fixedly connected to the upper cover plate 2.8 by bolts. The cantilever frame 2.7 is fixedly mounted on the lower surface of the upper cover plate 2.8, and the vibrator hopper 2.5 and the guide chute 2.3 are fixedly mounted on the lower surface of the cantilever frame 2.7. The granules are fed into the upper port of the feed pipe 2.1, which is used to receive the granules, and the lower port is connected to one end of the vibrator hopper 2.5. The other end of the vibrator hopper 2.5 is connected to the inlet of the guide chute 2.3. The outlet of the guide chute 2.3 is aligned above the belt 4.3 of the conveyor structure. The granules falling from the guide chute 2.3 land on the conveyor mechanism 4 and are then conveyed on the conveyor mechanism 4. The vibrator 2.2 is inverted and mounted on the lower surface of the upper cover plate 2.8 via the shock absorber seat 2.6. The vibrator 2.2 vibrates to shake off the granules accumulated in the vibrator hopper 2.5. The static eliminator bracket 2.10 is also mounted on the lower surface of the upper cover plate 2.8. The static eliminator 2.4 is fixedly mounted at the outlet of the guide chute 2.3 via the static eliminator bracket 2.10 to eliminate the static charge on the surface of the granules at the outlet of the guide chute 2.3.

[0039] In practice, the guide chute 2.3 is installed on the vibrator hopper 2.5 via the guide chute mounting plate 2.9.

[0040] The vibrator 2.2 is used to stably spread the granules in the vibrator hopper 2.5 onto the conveying mechanism 4. The feeding speed of the granules on the conveying mechanism 4 can be adjusted by parameters.

[0041] Feed pipe 2.1 is used to connect to the discharge port of the previous station. It introduces granules and has the function of detecting the presence or absence of granules. It is the only channel for feeding the granules to be detected.

[0042] The core function of the static eliminator 2.4 is to eliminate static electricity through technologies such as ion neutralization and grounding. Its application scenarios cover industrial production, daily life and special high-risk environments.

[0043] The shock absorber 2.6 can effectively eliminate the resonance of the upper cover plate 2.8 and reduce unnecessary vibration.

[0044] The vibrator hopper 2.5 is a container used to temporarily support and initially disperse the flow of granules. It has an open outlet in the flow direction to guide the granules into the feed chute 2.3. The vibrator hopper 2.5 has an adjustable installation angle to initially control the flow rate and volume of the granules.

[0045] like Figure 6 As shown, the overflow detection mechanism 3 includes a position sensor 3.1, a fixed plate 3.2, a swing plate 3.3, a rotating seat 3.4, a rotating shaft 3.5, and a support seat 3.6. The fixed plate 3.2 is vertically fixed on the frame 1 and is installed above the belt 4.2 of the conveying mechanism 4. The horizontal arrangement direction of the fixed plate 3.2 is perpendicular to the conveying direction of the conveying mechanism 4. A support seat 3.6 is installed on each side of the lower end of the fixed plate 3.2, and a rotating shaft 3 is horizontally fixed between the two support seats 3.6. 5. The rotating shaft 3.5 is perpendicular to the conveying direction; a rotating seat 3.4 is fixedly installed in the middle of the swing plate 3.3, and the rotating seat 3.4 is sleeved on the outer circumference of the rotating shaft 3.5, so that the rotating seat 3.4 and the swing plate 3.3 as a whole rotate around the rotating shaft 3.5; a position sensor 3.1 is also installed on the fixed plate 3.2. The position sensor 3.1 is used to measure the distance from the upper end of the swing plate 3.3. When the swing plate 3.3 rotates around the rotating shaft 3.5, the distance measured by the position sensor 3.1 changes. When the measured distance exceeds a preset threshold, it indicates that the granules accumulated on the belt 4.3 of the conveying mechanism 4 have overflowed.

[0046] In practice, an electrostatic eliminator 3.7 is also fixedly installed on the frame 1 to eliminate the electrostatic charge on the surface of the granules on the belt 4.3 of the conveying mechanism 4.

[0047] like Figure 8As shown, the conveying mechanism 4 includes a conveyor frame 4.1, an electric roller 4.2, a belt 4.3, a sidewall 4.4, a driven roller 4.5, and a support frame 4.6. A track is placed on the ground. The support frame 4.6 is slidably mounted on the track via a slider, allowing it to slide along the track's direction. A slide rail is provided at the upper end of the support frame 4.6. The conveyor frame 4.1 is slidably mounted on the slide rail of the support frame 4.6 via a slider, allowing it to slide along the track's direction. The two ends of the conveyor frame 4.1 in the conveying direction are respectively... An electric roller 4.2 and a driven roller 4.5 are arranged. A belt 4.3 is tactilely connected to both the electric roller 4.2 and the driven roller 4.5. The rolling of the electric roller 4.2 drives the belt 4.3 to convey materials, which in turn drives the driven roller 4.5 to roll. Side guards 4.4 are installed on both sides of the conveying frame 4.1 in the conveying direction to prevent the belt 4.3 from falling off the conveyor frame 4.1. One end of the belt 4.3 is positioned below the lower port of the guide chute 2.3 of the feeding mechanism 2, and the other end of the belt 4.3 is aligned with the feed inlet of the particle detection mechanism 5. The belt 4.3 conveys the particle material from one end of the lower port of the guide chute 2.3 to one end of the feed inlet of the particle detection mechanism 5.

[0048] In specific implementation, the electric roller 4.2 is the driving wheel of the conveying mechanism 4 and is controlled by a motor, while the driven roller 4.5 is the driven wheel of the conveying mechanism 4.

[0049] The conveying mechanism 4 also includes an encoder wheel 4.7, a dust extraction hood 4.8, a deviation detection device 4.9, a limit block 4.10, a side guard 4.11, a negative pressure interface 4.11, a diversion pipe 4.12, and a diversion valve 4.13. A side guard 4.11 is also provided on the outer side of each guard edge 4.4 to protect it. The limit block 4.10 consists of two sets of diagonal members, positioned at the front and rear of the conveying direction respectively. One set of diagonal members limits the forward movement of the conveyor frame 4.1, while the other set limits the backward movement of the conveyor frame 4.1. Specifically, each set of diagonal components consists of two corner blocks. One corner block is fixedly installed on the slide rail of the support frame 4.6, and the other corner block is fixedly installed on the side of the conveyor frame 4.1. When the conveyor frame 4.1 moves on the slide rail of the support frame 4.6, the two corner blocks abut against each other, thus restricting the conveyor frame 4.1 from moving in one direction. The two sets of diagonal components allow the conveyor frame 4.1 to move in two directions, thereby preventing the conveyor frame 4.1 from falling off the slide rail of the support frame 4.6 and causing unnecessary damage. A dust suction hood 4.8 is also installed below one end of the belt 4.3 near the pellet detection mechanism 5 to absorb dust generated during the conveying process of the belt 4.3. A belt deviation detection device 4.9 is also installed below the belt 4.3 to detect whether the belt 4.3 deviates during the conveying process; an encoder wheel 4.7 is also synchronously installed at the end where the driven roller 4.5 is located to obtain the moving speed of the belt 4.3.

[0050] Several negative pressure ports 4.11 are also installed on the conveyor frame 4.1. All negative pressure ports 4.11 are connected to a negative pressure vacuum cleaner 7.5 installed at the lower port of the unloading mechanism 2 through multiple diversion pipes 4.12 and multiple diversion valves 4.13. The negative pressure vacuum cleaner 7.5 absorbs excess dust and debris through multiple pipes. At the same time, the negative pressure vacuum cleaner 7.5 also absorbs dust and debris generated at the lower port of the unloading mechanism 2.

[0051] In this embodiment, the electric roller 4.2 is a crown-shaped electric roller with automatic correction, which is simple to control, saves installation space, and is easy to maintain. The direction of the track set on the ground depends on the specific situation. The ultimate purpose of the track set on the ground and the slide rail set on the support frame 4.6 is to facilitate the position change of the conveyor frame 4.1, thereby facilitating the replacement and maintenance of the belt 4.3.

[0052] like Figure 9 As shown, the particle inspection mechanism 5 includes a particle parabolic bin 5.1, a background roller 5.2, a diffuse reflector 5.3, a distribution bin 5.4, at least three vision inspection modules 5.5, and several light sources. The distribution bin 5.4 consists of a waste bin 5.4.1 and a particle bin 5.4.2, and is placed on the ground. During the screening process, defective particles fall into the particle bin 5.4.2 and are collected. Defective particles exit from the outlet of the particle parabolic bin 5.1 and are ejected into the waste bin 5.4.1 by the rejection mechanism 6 and collected. The particle parabolic bin 5.1 is fixedly installed on the frame 1. The inlet of the particle parabolic bin 5.1 is aligned with the outlet of the conveyor belt 4.3 of the conveyor mechanism 4, and the outlet of the particle parabolic bin 5.1 is aligned with the particle bin 5.4.2 of the distribution bin 5.4. The particle parabolic bin 5.1 forms a parabolic flow channel 5.6 inside, from which the particles exit the conveyor mechanism 4. The incoming granules undergo parabolic motion within the parabolic flow channel 5.6. A background rod 5.2 is vertically installed at the upper part of the granule parabolic chamber 5.1 (parabolic flow channel 5.6), and the granules pass over the background rod 5.2 during their parabolic fall. At least three visual inspection ports are also provided in the upper part of the granule parabolic chamber 5.1, and a visual inspection module 5.5 is installed at each visual inspection port. Each visual inspection module 5.5 captures images of the area where the background rod 5.2 is located from different angles, collecting image data when the granules pass over the background rod 5.2 during their fall. Several light sources are installed inside the granule parabolic chamber 5.1 to illuminate the interior of the chamber, facilitating visual inspection by the visual inspection modules 5.5. A diffuse reflector plate 5.3 is also provided inside the granule parabolic chamber 5.1 to diffusely reflect the light emitted by the light sources.

[0053] The background roller 5.2 primarily provides a stable imaging background for the camera lens 5.8 when taking pictures, and also has high anti-interference capabilities. All vision inspection modules 5.5 together form the vision inspection system. The light source provides a reliable optical environment for stable imaging of the vision inspection system. The diffuse reflector 5.3 is an optical element that achieves uniform light scattering through its surface microstructure. Its core function is to control light distribution, improve measurement accuracy, and optimize visual effects. The diffuse reflector 5.3 uses scattering particles to refract and reflect incident light in multiple directions, forming a soft and uniform illumination effect. The uniform reflection characteristics eliminate lens distortion and improve image quality, making it suitable for machine vision and image processing.

[0054] Each vision inspection module 5.5 includes a cooling fan 5.7, a camera lens 5.8, a dustproof isolator 5.9, and an adjustment bracket 5.10. The adjustment bracket 5.10 is threaded onto the granule parabolic hopper 5.1 at the corresponding vision inspection port. Both the cooling fan 5.7 and the camera lens 5.8 are mounted on the adjustment bracket 5.10. The cooling fan 5.7 is located at the body end of the camera lens 5.8 to dissipate heat from the camera lens 5.8. The dustproof isolator 5.9 is detachably installed at the corresponding vision inspection port and forms a seal with the vision inspection port. The dustproof isolator 5.9 is located at the lens end of the camera lens 5.8, thereby isolating the camera lens 5.8 from the parabolic flow channel 5.6 inside the granule parabolic hopper 5.1, thus preventing dust inside the granule parabolic hopper 5.1 from contaminating the camera lens 5.8. The camera lens 5.8 is aimed at the area where the background roller 5.2 is located to acquire images, collecting image data when the granules pass over the background roller 5.2 during their fall.

[0055] Furthermore, a dust blowing module 5.11 is installed above the dust isolator 5.9 to periodically clean the dust adsorbed on the surface of the dust isolator 5.9 and prevent the dust on the surface of the dust isolator 5.9 from causing a decrease in the imaging quality of the camera lens 5.8.

[0056] In practice, each visual inspection port is equipped with a corresponding light source to facilitate image capture by the corresponding camera lens 5.8. The adjustment bracket 5.10 is used to adjust the installation angle of the camera lens 5.8.

[0057] In this embodiment, the pellet detection mechanism 5 uses three vision detection modules 5.5. The three vision detection modules 5.5 acquire images of the area where the background rod 5.2 is located from different angles. Based on the images acquired from the three different angles, the control module 8 processes and obtains which specific pick 6.7 the pellet will pass through during its fall, thereby controlling the corresponding pick 6.7 to reject the pellet.

[0058] In this embodiment, a total of 7 light sources are provided to complete the construction of the internal optical environment of the device, of which 4 light sources are used to illuminate the channel for pellet ejection, such as... Figure 9 Light sources 3 (5.12), 4 (5.13), 6 (5.14), and 7 (5.15) are used; the other three light sources are used to supplement the illumination of the corresponding visual inspection ports, such as... Figure 9 The system includes three light sources: Light Source 1 (5.16), Light Source 2 (5.17), and Light Source 5 (5.18). These seven light sources form a stable, blind-spot-free internal lighting environment, effectively eliminating shadows during particle imaging. Each light source features an integrated design of the LED, heat sink, and cooling fan, reducing installation space and facilitating maintenance. The light sources can be infinitely adjusted via a light source controller to compensate for brightness degradation over prolonged use, ensuring consistent visual imaging.

[0059] like Figure 10 As shown, the dustproof isolator 5.9 includes a handle outer plate 5.19, a dustproof isolator support 5.20, and an optical glass cover. The dustproof isolator support 5.20 has a through-hole in the middle. One side of the dustproof isolator support 5.20 is close to the lens end of the camera lens 5.8. The optical glass cover is sealed and installed on the other side of the dustproof isolator support 5.20. A dustproof pressure plate 5.21 is also provided between the optical glass cover seal and the other side of the dustproof isolator support 5.20 to improve the sealing performance. The dustproof isolator support 5.20 also has a handle outer plate 5.19 for easy hand handling of the dustproof isolator 5.9.

[0060] In this embodiment, the dustproof isolation support 5.20 is configured as a whole triangular prism, with a hollowed-out section running through two of its faces. One of the hollowed-out faces is close to the lens end of the camera lens 5.8. The other hollowed-out face is sequentially fitted with a dustproof pressure plate 5.21, an optical glass 5.22, and an inner sealing plate 5.23. The optical glass 5.22 and the inner sealing plate 5.23 together form an optical glass cover. The optical glass cover is installed on the other hollowed-out face via the dustproof pressure plate 5.21. The non-hollowed-out face is fixedly fitted with a handle outer plate 5.19 for easy hand-held handling and installation.

[0061] In practice, the camera lens 5.8 captures images of the area where the background stick 5.2 is located through the optical glass cover plate set by the dustproof isolator 5.9.

[0062] like Figure 11As shown, the rejection mechanism 6 includes a first vertical plate 6.1, a second vertical plate 6.2, a fixed base 6.3, a rotating shaft 6.4, and several rejection components. Each rejection component includes a cylinder 6.5, a solenoid valve island 6.6, a paddle 6.7, a spring 6.8, and a pull rod 6.9. The fixed base 6.3 is fixedly installed at the discharge port of the particle parabolic hopper 5.1 of the particle detection mechanism 5. The first vertical plate 6.1 and the second vertical plate 6.2 are vertically fixedly installed at the horizontal ends of the fixed base 6.3, respectively. The rotating shaft 6.4 is horizontally fixedly installed between the first vertical plate 6.1 and the second vertical plate 6.2. Each paddle 6.7 is vertically arranged, and each paddle 6.7 has a round hole at its upper part. The rotating shaft 6.4 passes through the round holes of each paddle 6.7, so that all paddles 6.7 are tightly but not in contact along one end of the rotating shaft 6.4 to the other end. The arrangement is such that each paddle 6.7 can rotate around a pivot 6.4; each paddle is equipped with a cylinder 6.5, the cylinder body of which is fixedly mounted on a fixed base 6.3, and the piston rod of the cylinder 6.5 is vertically arranged. One end of the piston rod is fixedly connected to a pull rod 6.9, and the other end of the pull rod 6.9 is fixedly connected to the upper end of the paddle 6.7, so that the up and down extension of the piston rod drives the paddle 6.7 to rotate around the pivot 6.4; each cylinder 6.5 is also equipped with a corresponding solenoid valve island 6.6 for controlling the cylinder 6.5; the lower end of each paddle 6.7 is fixedly connected to a spring 6.8. During the rotation of the paddle 6.7 around the pivot 6.4, the spring 6.8 can strike the defective particles, causing the defective particles to fall into the waste bin 5.4.1 of the distribution bin 5.4 for collection.

[0063] In practice, the rejection mechanism 6 also includes a limiting post 6.10 and a cable connector 6.11. The limiting post 6.10 is horizontally fixed between the first vertical plate 6.1 and the second vertical plate 6.2, used to limit the stop position of the rotation of the lever 6.7, which is a mechanical hard limit. All solenoid valve islands 6.6 are electrically connected to the control module 8 through the corresponding cable connectors 6.11.

[0064] The automatic analysis and screening device also includes a control module 8, which is electrically connected to all camera lenses 5.8 and all solenoid valve islands 6.6.

[0065] In practice, the automatic analysis and screening device also includes an interactive interface 7 for human-computer interaction, which facilitates intuitive control and debugging of the equipment and viewing of equipment test reports.

[0066] The automatic analysis and screening device is also equipped with an audio-visual module 11, which consists of a three-color lamp with a buzzer and a signal control unit, mainly used to display and prompt the working status of the equipment.

[0067] The automatic analysis and screening device is also equipped with dust collection ports in multiple locations to collect dust and granules scattered during device operation, facilitating centralized management. In this embodiment, three dust collection ports are provided. Dust collection port 1 (7.1) is located below and connected to the dust suction hood 4.8, used to collect debris remaining from the conveyor belt 4.3. Dust collection ports 2 (7.2) and 3 (7.3) are installed on the granule parabolic bin 5.1, used to collect debris formed during the parabolic process. Dust collection ports 1 (7.1), 2 (7.2), and 3 (7.3) are all connected to the dust collection box 7.4, and dust is ultimately collected by the dust collection box 7.4 through these ports.

[0068] The automatic analysis and screening device is also equipped with an emergency stop module 9, which is used to stop the equipment in case of equipment malfunction or operational abnormality to protect personal safety.

[0069] The automatic analysis and screening device is also equipped with an air-cooling system 10, which is used to dissipate heat from the heat-generating electrical components of the device to ensure stable operation of the device.

[0070] like Figure 12 As shown, the working process of the automatic analysis and screening device is as follows: After entering from the upper port of the feed pipe 2.1, the granules enter the vibrator hopper 2.5. Under the vibration of the vibrator 2.2, the granules in the vibrator hopper 2.5 are evenly fed into the guide chute 2.3.

[0071] The granules coming from the outlet of the feed chute 2.3 are conveyed by the belt 4.3 on the conveying mechanism 4. When the granules accumulate to a certain height, they will touch the lower end of the swing plate 3.3 during the conveying process, causing the swing plate 3.3 to rotate around the shaft 3.5, thereby increasing the distance detected by the position sensor 3.1. Conversely, when the automatic analysis and screening device is in operation, if the distance detected by the position sensor 3.1 exceeds the preset threshold, it indicates that the granules on the belt 4.3 of the conveying mechanism 4 have accumulated to a certain height (the height of the lower end of the swing plate 3.3), resulting in overflow.

[0072] After being conveyed by the conveyor mechanism 4, the granules enter the parabolic flow channel 5.6 from the feed port of the granule parabolic bin 5.1 and undergo parabolic motion. When the granules pass the background roller 5.2, each camera lens 5.8 is aimed at the area where the background roller 5.2 is located to collect images. All the collected images are transmitted to the control module 8. The control module 8 processes and determines whether the granules in the images are defective granules and which specific deflector 6.7 the granules will pass through during the falling process.

[0073] When one of the resin particles in the granules falls to the deflector 6.7 of the rejection mechanism 6, if the control module 8 determines that the resin particle is non-defective, no processing is performed, and the resin particle falls into the granule bin 5.4.2 for collection. If the control module 8 determines that the resin particle is defective, the control module 8 processes multiple images to obtain the deflector 6.7 that the resin particle passed through, and then controls the solenoid valve island 6.6 corresponding to the deflector 6.7 to extend the telescopic rod of the cylinder 6.5. The telescopic rod drives the pull rod 6.9, which in turn drives the upper end of the deflector 6.7 to press down. This causes the spring 6.8 connected to the lower end of the deflector 6.7 to spring up, and the spring 6.8 bounces onto the resin particle, sending it into the waste bin 5.4.1 for collection. All resin particles are processed in this manner to determine whether to reject them.

[0074] like Figure 1 As shown, the automatic analysis and screening device is implemented according to the following automatic analysis and screening method: S1. Place the granules at the upper port of the feeding mechanism 2. After the granules come out from the lower port of the feeding mechanism 2, they fall into the conveying mechanism 4.

[0075] S2. The conveying mechanism 4 conveys the granules until they reach the feed inlet of the granule detection mechanism 5, and the overflow detection mechanism 3 detects in real time whether the granules on the conveying mechanism 4 overflow.

[0076] S3. The pellets undergo parabolic motion within the pellet detection mechanism 5. The pellet detection mechanism 5 acquires images of the falling pellets in real time and transmits the acquired images to the control module 8 for processing.

[0077] S4. When the granules fall to the lower end of the rejection mechanism 6, the rejection mechanism 6 performs a rejection process on the granules based on the result of the control module 8.

[0078] When the granules fall to the pick-off plate 6.7 of the rejection mechanism 6, if the control module 8 determines that they are non-defective granules, no processing is performed, and the granules fall into the granule bin 5.4.2 for collection. If the control module 8 determines that they are defective granules, the control module 8 processes multiple images to determine which pick-off plate 6.7 the granules will pass over during their fall. It then controls the solenoid valve island 6.6 corresponding to the pick-off plate 6.7, causing the extension rod of the cylinder 6.5 to extend. The extension rod drives the pull rod 6.9, which in turn causes the upper end of the pick-off plate 6.7 to press down. This causes the spring 6.8 connected to the lower end of the pick-off plate 6.7 to spring up, hitting the granules and causing them to fall into the waste bin 5.4.1 for collection.

[0079] This invention overcomes the problems of low efficiency, high false negative rate, and rising labor costs in existing technologies. Especially for high-end products requiring full inspection, manual and offline inspection methods are clearly insufficient. The method of this invention integrates conveying, defect detection, and rejection, enabling automatic analysis and screening of defective particles, offering advantages of high efficiency, stability, and reliability. The above embodiments are merely preferred embodiments to fully illustrate this invention, and the scope of protection of this invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on this invention are all within the scope of protection of this invention. The scope of protection of this invention is defined by the claims.

Claims

1. An automated online analysis and screening method for resin particle defects, characterized in that, Includes the following steps: S1. Place the granules into the upper port of the feeding mechanism (2) of the automatic analysis and screening device. After the granules come out from the lower port of the feeding mechanism (2), they fall into the conveying mechanism (4) of the automatic analysis and screening device. S2. The conveying mechanism (4) conveys the granules until they reach the feed inlet of the granule detection mechanism (5) of the automatic analysis and screening device, and the overflow detection mechanism (3) of the automatic analysis and screening device detects in real time whether the granules on the conveying mechanism (4) overflow. S3. The pellets undergo parabolic motion within the pellet detection mechanism (5). The pellet detection mechanism (5) collects images of the falling pellets in real time and transmits the collected images to the control module (8) of the automatic analysis and screening device for processing. S4. When the granules fall to the lower end of the rejection mechanism (6) of the automatic analysis and screening device, the rejection mechanism (6) performs rejection processing on the granules according to the result of the control module (8).

2. The automatic analysis and screening method according to claim 1, characterized in that, Step S4 specifically involves: When the pellets fall to the rejection mechanism (6), if the control module (8) determines that the pellets are non-defective, no processing is done and the pellets fall into the pellet bin (5.4.2) for collection; if the control module (8) determines that the pellets are defective, the control module (8) controls the rejection mechanism (6) to reject the defective pellets into the waste bin (5.4.1) for collection.

3. The automatic analysis and screening method according to claim 2, characterized in that: The automatic analysis and screening device includes a frame (1) and a feeding mechanism (2), a conveying mechanism (4), an overflow detection mechanism (3), a particle detection mechanism (5), and a rejection mechanism (6) installed on the frame (1). The frame (1) is arranged on the ground. Particles are put into the upper port of the feeding mechanism (2). After the particles pass through the feeding mechanism (2) and come out from the lower port, they fall into the conveying mechanism (4). The conveying mechanism (4) conveys the particles to the feed port of the particle detection mechanism (5). After being detected by the particle detection mechanism (5), the particles come out from the discharge port of the particle detection mechanism (5). The rejection mechanism (6) rejects the particles with defects in real time according to the detection results. The overflow detection mechanism (3) is arranged above the conveying mechanism (4) and judges in real time whether the particles conveyed on the conveying mechanism (4) overflow.

4. The automatic analysis and screening method according to claim 3, characterized in that: The feeding mechanism (2) includes a feed pipe (2.1), a vibrator (2.2), a guide chute (2.3), a static eliminator II (2.4), a vibrator hopper (2.5), a shock absorber seat (2.6), a cantilever frame (2.7), and an upper cover plate (2.8). The upper cover plate (2.8) is fixedly installed on the frame (1). The feed pipe (2.1) passes vertically through the circular hole in the upper cover plate (2.8) and is fixedly connected to the upper cover plate (2.8). The cantilever frame (2.7) is fixedly installed on the lower surface of the upper cover plate (2.8). The vibrator hopper (2.5) and the guide chute (2.3) are fixedly installed on the surface respectively; the granules are put into the upper port of the feed pipe (2.1), the lower port of the feed pipe (2.1) is connected to one end of the vibrator hopper (2.5), the other end of the vibrator hopper (2.5) is connected to the inlet of the guide chute (2.3), the outlet of the guide chute (2.3) is aligned with the conveying structure, the vibrator (2.2) is installed upside down on the lower surface of the upper cover plate (2.8) through the shock absorber seat (2.6), and the static eliminator II (2.4) is fixedly installed at the outlet of the guide chute (2.3).

5. The automatic analysis and screening method according to claim 3, characterized in that: The overflow detection mechanism (3) includes a position sensor (3.1), a fixed plate (3.2), a swing plate (3.3), a rotating seat (3.4), a rotating shaft (3.5), and a support seat (3.6); the fixed plate (3.2) is vertically fixed on the frame (1), and the fixed plate (3.2) is installed above the conveying mechanism (4), and the horizontal arrangement direction of the fixed plate (3.2) is perpendicular to the conveying direction of the conveying mechanism (4); a support seat is installed on each side of the lower end of the fixed plate (3.2). 3.6) A rotating shaft (3.5) is horizontally fixed between the two support seats (3.6); a rotating seat (3.4) is fixedly installed in the middle of the swing plate (3.3), and the rotating seat (3.4) is sleeved on the outer circumference of the rotating shaft (3.5), so that the rotating seat (3.4) and the swing plate (3.3) rotate around the rotating shaft (3.5); a position sensor (3.1) is also installed on the fixed plate (3.2), and the position sensor (3.1) is used to measure the distance from the upper end of the swing plate (3.3).

6. The automatic analysis and screening method according to claim 3, characterized in that: The conveying mechanism (4) includes a conveyor frame (4.1), an electric roller (4.2), a belt (4.3), a side rail (4.4), a driven roller (4.5), and a support frame (4.6). A track is placed on the ground. The support frame (4.6) is slidably mounted on the track by a slider. A slide rail is provided at the upper end of the support frame (4.6). The conveyor frame (4.1) is slidably mounted on the slide rail of the support frame (4.6) by a slider. Electric rollers (4.2) are respectively arranged at both ends of the conveying direction of the conveyor frame (4.1). The driven roller (4.5) and the belt (4.3) are respectively connected to the electric drum (4.2) and the driven roller (4.5). The rolling of the electric drum (4.2) drives the belt (4.3) to convey, and then the belt (4.3) drives the driven roller (4.5) to roll. Both sides of the conveyor frame (4.1) in the conveying direction are equipped with side guards (4.4). One end of the belt (4.3) is arranged below the lower port of the feeding mechanism (2), and the other end of the belt (4.3) is aligned with the feed port of the particle detection mechanism (5).

7. The automatic analysis and screening method according to claim 3, characterized in that: The particle detection mechanism (5) includes a particle parabolic bin (5.1), a background roller (5.2), a diffuse reflector (5.3), a distribution bin (5.4), at least three visual detection modules (5.5), and several light sources; the distribution bin (5.4) consists of a waste bin (5.4.1) and a particle bin (5.4.2), and is placed on the ground; the particle parabolic bin (5.1) is fixedly installed on the frame (1), the inlet of the particle parabolic bin (5.1) is aligned with the outlet of the conveying mechanism (4) for conveying particles, the outlet of the particle parabolic bin (5.1) is aligned with the particle bin (5.4.2) of the distribution bin (5.4), and a parabolic flow channel (5.6) is formed inside the particle parabolic bin (5.1) to transport particles from the conveying mechanism (4). The granules from the feeding mechanism (4) undergo parabolic motion within the parabolic flow channel (5.6); the background rod (5.2) is vertically installed at the upper part of the granule parabolic chamber (5.1), and the granules pass over the background rod (5.2) when they fall in a parabolic trajectory; at least three visual detection ports are also provided at the upper part of the granule parabolic chamber (5.1), and a visual detection module (5.5) is installed at each visual detection port. Each visual detection module (5.5) captures images of the area where the background rod (5.2) is located from different angles; several light sources are installed inside the granule parabolic chamber (5.1); a diffuse reflector plate (5.3) is also provided inside the granule parabolic chamber (5.1) to diffusely reflect the light emitted by the light sources.

8. The automatic analysis and screening method according to claim 7, characterized in that: Each of the aforementioned visual inspection modules (5.5) includes a cooling fan (5.7), a camera lens (5.8), a dustproof isolator (5.9), and an adjustment bracket (5.10); the adjustment bracket (5.10) is installed on the granular parabolic hopper (5.1) at the corresponding visual inspection port, the cooling fan (5.7) and the camera lens (5.8) are both installed on the adjustment bracket (5.10), and the cooling fan (5.7) is arranged at the body end of the camera lens (5.8); the dustproof isolator (5.9) is installed at the corresponding visual inspection port and forms a seal with the visual inspection port, and the dustproof isolator (5.9) is arranged at the lens end of the camera lens (5.8), thereby isolating the camera lens (5.8) from the parabolic flow channel (5.6) in the granular parabolic hopper (5.1); the camera lens (5.8) is aimed at the area where the background rod (5.2) is located to acquire images.

9. The automatic analysis and screening method according to claim 8, characterized in that: The dustproof isolator (5.9) includes a handle outer plate (5.19), a dustproof support (5.20), and an optical glass cover. The dustproof support (5.20) has a hollowed-out center, with one side of the hollowed-out surface close to the lens end of the camera lens (5.8). The optical glass cover is sealed and installed on the other side of the hollowed-out surface. The dustproof support (5.20) is also provided with a handle outer plate (5.19) to facilitate hand-holding the dustproof isolator (5.9).

10. The automatic analysis and screening method according to claim 3, characterized in that: The rejection mechanism (6) includes a first vertical plate (6.1), a second vertical plate (6.2), a fixed base (6.3), a rotating shaft (6.4), and several rejection components. Each rejection component includes a cylinder (6.5), a solenoid valve island (6.6), a paddle (6.7), a spring (6.8), and a pull rod (6.9). The fixed base (6.3) is fixedly installed at the discharge port of the particle detection mechanism (5). The first vertical plate (6.1) and the second vertical plate (6.2) are vertically fixedly installed at the horizontal ends of the fixed base (6.3). A rotating shaft (6.4) is horizontally fixed between the first upright plate (6.1) and the second upright plate (6.2); each paddle (6.7) is vertically arranged, and each paddle (6.7) has a round hole at its upper part. The rotating shaft (6.4) passes through the round holes of each paddle (6.7), so that all paddles (6.7) are arranged sequentially from one end to the other along the rotating shaft (6.4), and each paddle (6.7) can rotate around the rotating shaft (6.4); a cylinder is installed above each paddle (6.2). 6.5) The cylinder body of the cylinder (6.5) is fixedly installed on the fixed base (6.3). The piston rod of the cylinder (6.5) is arranged vertically. One end of the piston rod is fixedly connected to the pull rod (6.9). The other end of the pull rod (6.9) is fixedly connected to the upper end of the paddle (6.7). Thus, the up and down extension of the piston rod drives the paddle (6.7) to rotate around the rotating shaft (6.4). Each cylinder (6.5) is also equipped with a solenoid valve island (6.6) for controlling the cylinder (6.5). The lower end of each paddle (6.7) is fixedly connected to a spring (6.8). During the rotation of the paddle (6.7) around the rotating shaft (6.4), the spring (6.8) can hit the granules, causing the granules to fall into the waste bin (5.4.1) of the distribution bin (5.4) for collection.

Images