Plastic particle feeding and screening machine

Abstract

The invention provides a plastic particle feeding and screening machine, and relates to the technical field of plastic particles, the plastic particle feeding and screening machine comprises a base and four supporting vertical plates mounted on the base, a screening assembly is arranged on the base, the screening assembly comprises a screening mechanism and a feeding mechanism, and the screening mechanism comprises a driving motor, a protective shell and a screening bottom plate; the driving motor and the protective shell are both installed on the base. By arranging the screening plates with different apertures, the driving motor, the protective shell of the driving motor, the feeding guide plate, the electric guide rail device, the protective net, the screening placement plate and the waterproof cover, the effects of multi-layer screening of plastic particles, stable equipment operation, efficient and orderly feeding and adaptation to multiple working conditions are achieved, meanwhile, electric conveying is achieved through the electric guide rail, and the working efficiency is improved. Compared with a traditional conveying mode depending on gravity or a fixed mechanical structure, the conveying device has higher flexibility, the position and the motion state of the guide-out plate can be conveniently adjusted according to actual production requirements, and the automation degree and the production efficiency of the whole production process are improved.

Description

Technical Field

[0001] The invention relates to the technical field of plastic particles, and in particular to a plastic particle feeding and screening machine. Background Art

[0002] In the plastic processing industry, plastic particles are basic raw materials, and their quality and purity play a key role in the performance of plastic products. Traditional plastic particle screening methods often have many limitations;

[0003] In the current field of plastic particle processing, many existing equipment have obvious defects. Since the plastic particles are not screened, materials with different particle sizes and impurity contents are mixed together for feeding operations. This causes many problems in subsequent processing links, such as injection molding, extrusion molding and other processes due to the unevenness of the particles, and ignores the importance of pre-screening and targeted collection of plastic particles. This design deficiency directly leads to the difficulty in achieving the ideal feeding effect. On the one hand, the melting rates of particles of different sizes are inconsistent during the processing process, which will lead to uneven internal structure of the product and stress concentration points, which seriously affect the strength and toughness of plastic products and increase the defective rate. Moreover, there are no targeted collection measures, and it is impossible to classify, reserve and supply particles that meet specific production requirements. It is difficult for enterprises to flexibly allocate raw materials according to different product orders, which reduces the flexibility and adaptability of production.

[0004] For example, the Chinese invention patent (publication number: CN118456708B) discloses a "feed screening device for a mixer for the production of small plastic particles". Its specification discloses: 1. In the production of plastic particles, there are particles of different sizes. If the particles of different sizes are directly mixed and used, the plastic particles will not be melted evenly during the subsequent melting, making it impossible to produce stable or identical parts, which will have a low quality impact on the production and processing of plastic products. 2. In the storage of plastic particles, due to the different heat resistance of different plastic particles and the different storage environments of plastic particles, in the high temperature environment in summer, poor ventilation or poor heat resistance of the plastic itself, the plastic particles will be severely agglomerated, which will affect the subsequent production and processing. The above patents can prove the defects of the existing technology.

[0005] Therefore, we made improvements to this and proposed a plastic particle feeding and screening machine. Summary of the invention

[0006] The purpose of the present invention is to address the problems raised by the current background technology.

[0007] In order to achieve the above-mentioned purpose of the invention, the present invention provides the following plastic particle feeding and screening machine to improve the above-mentioned problem.

[0008] The specific application is as follows:

[0009] A plastic particle feeding and screening machine, comprising a base and four supporting uprights mounted on the base, the base being provided with a screening component, the screening component comprising a screening mechanism and a feeding mechanism, the screening mechanism comprising a driving motor, a protective shell and a screening bottom plate, the driving motor and the protective shell being both mounted on the base, the driving motor being located in the protective shell, the screening bottom plate being mounted on the output end of the driving motor, a plurality of screening plates being mounted on the screening bottom plate, a waterproof cover being mounted on the surface of the plurality of screening plates being mounted on the base, a plurality of screening holes being provided on the plurality of screening plates, a supporting ring being connected to the top of the screening plate, a screening cover being mounted on the supporting ring, a plurality of screening plates being further provided with a protective net, and at least three screening placement plates being mounted between the protective net and the screening plate;

[0010] The feeding mechanism comprises a feeding guide plate, a baffle and an electric guide rail, a plurality of the feeding guide plates are mounted on the waterproof cover and the protective net, the baffle is connected to the feeding guide plate, two electric guide rails are mounted on the free surfaces of the plurality of feeding guide plates, the electric guide rail is connected to a lead-out plate, and two baffle plates are mounted on the lead-out plate and are in contact with the free surfaces of the feeding guide plates;

[0011] The four support vertical plates are connected with the base through screws, and the four support vertical plates are installed with, which form a triangular distribution with the support vertical plates.

[0012] As a preferred technical solution of the present application, a cleaning mechanism is provided in the plurality of screening plates, and the cleaning mechanism includes a cleaning water pump, a water guide pipe and a cleaning top pipe. The cleaning water pump is installed on the base, and the output and input ends of the cleaning water pump are both installed with the water guide pipe. The cleaning top pipe is connected to the screening cover, and a feeding pipe connected to the screening cover is installed on the cleaning top pipe. The cleaning top pipe is connected to the cleaning bottom pipe through a sealing bearing, and two material throwing ports are provided on the cleaning bottom pipe. A hollow sprinkler plate communicated with the water guide pipe is installed on the cleaning bottom pipe, and a plurality of cleaning brushes are connected to the cleaning top pipe and the cleaning bottom pipe.

[0013] As a preferred technical solution of the present application, there are three screening plates in total, and the screening plates gradually expand away from the screening bottom plate, and the hole diameters of the screening plates expand from the bottom to the top.

[0014] As the preferred technical solution of the present application, the joint surfaces of the three screening plates and the screening plates are in a fitted state, the surfaces of the three screening plates are provided with apertures corresponding to the three screening plates, and the upper surfaces of the screening plates are inclined.

[0015] As a preferred technical solution of the present application, there are three cleaning brushes in total, one of which is located at the cleaning top pipe, and the other two are located at the cleaning bottom pipe. The cleaning top pipe is in a ring shape and is distributed in the cleaning top pipe and the cleaning bottom pipe. The apertures of the three cleaning top pipes are distributed from large to small.

[0016] As a preferred technical solution of the present application, the cleaning mechanism also includes a cleaning mounting plate, cleaning cotton strips and a magnetic mounting plate. The cleaning mounting plate is mounted on a sealed bearing. Both ends of the multiple cleaning cotton strips are connected to the magnetic mounting plate. The cleaning cotton strips are mounted on the cleaning mounting plate through the magnetic mounting plate. The bottom end of the magnetic mounting plate is mounted on a mounting groove opened on the screening bottom plate. The ends of the multiple cleaning cotton strips away from the cleaning mounting plate are gradually expanding.

[0017] As a preferred technical solution of the present application, a blocking mechanism is provided at the material throwing port of the cleaning bottom pipe, and the cleaning bottom pipe blocks the switch at the material throwing port through the blocking mechanism.

[0018] As a preferred technical solution of the present application, the blocking mechanism includes a blocking plate, a rubber blocking block and a positioning block. The blocking plate is symmetrically arranged at the material throwing port, the rubber blocking block is installed on the blocking plate at the material throwing port, the positioning block is installed on the cleaning bottom pipe, and the positioning block is connected to a guide movable rod that passes through the blocking plate, and the guide movable rod is installed with a reset spring at both ends respectively connected to the positioning block and the blocking plate.

[0019] As a preferred technical solution of the present application, the number of the return springs is four in total, and the return springs are symmetrically distributed at the bottom end of the cleaning bottom tube in a group of two.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] In the scheme of this application:

[0022] 1. In order to solve the problem of poor feeding and screening effect in the prior art, the present application realizes the effects of multi-layer screening of plastic particles, stable operation of the equipment, efficient and orderly feeding, and adaptability to various working conditions by setting screening plates with different apertures, driving motors and their protective shells, feeding guide plates and electric guide rail devices, protective nets and screening placement plates, and good waterproof covers. At the same time, the electric guide rails realize electric conveying, which has greater flexibility than the traditional conveying method relying on gravity or fixed mechanical structures. The position and movement state of the export plate can be conveniently adjusted according to actual production needs, and the screened plastic particles of different batches and different particle sizes can be conveyed to the corresponding collection container or the next processing step, thereby improving the automation degree and production efficiency of the entire production process;

[0023] 2. In order to solve the problems of inconvenience in cleaning and blockage during cleaning in the screening process in the prior art, the present application can perform all-round and deep cleaning of plastic particles through the synergistic effect of a water spray system consisting of a cleaning water pump, a water pipe, a hollow sprinkler plate, and a cleaning brush. The water spray can remove dust, loose dirt, etc. on the surface of the particles, while the cleaning brush can effectively scrape off oil stains, sticky impurities, etc. attached to the surface of the particles, greatly improving the cleanliness of the plastic particles, providing purer raw materials for the subsequent production of plastic products, helping to improve product quality, and reduce product defects caused by impurities, such as bubbles, cracks, uneven color, etc. The cleaning mechanism and the screening mechanism are cleverly combined together to realize a continuous operation process of cleaning first and then screening in the same equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the overall structure of a plastic particle feeding and screening machine provided in this application;

[0025] Figure 2 A schematic diagram of the overall expanded structure of a plastic particle feeding and screening machine provided in this application;

[0026] Figure 3 A schematic diagram of the structure of a screening plate for a plastic particle feeding and screening machine provided in this application;

[0027] Figure 4 A schematic diagram of the screening mechanism structure of a plastic particle feeding and screening machine provided in this application;

[0028] Figure 5 A schematic diagram of the screening plate structure of a plastic particle feeding and screening machine provided in this application;

[0029] Figure 6 A schematic diagram of the cleaning mechanism structure of a plastic particle feeding and screening machine provided in this application;

[0030] Figure 7 A schematic diagram of the cleaning mechanism of a plastic particle feeding and screening machine provided in the present application from a bottom-up perspective;

[0031] Figure 8 A schematic diagram of the side cross-section structure of a cleaning mechanism of a plastic particle feeding and screening machine provided in this application;

[0032] Fig. 9 A plastic particle feeding and screening machine provided in this application Figure 8 The enlarged structural diagram at A in the middle;

[0033] Fig.10 A schematic cross-sectional structure diagram of a hollow sprinkler plate of a plastic particle feeding and screening machine provided in this application;

[0034] Fig.11 A schematic diagram of the structure of a blocking mechanism of a plastic particle feeding and screening machine provided in this application;

[0035] Fig.12 A schematic diagram of the structure of a feeding guide plate of a plastic particle feeding and screening machine provided in this application.

[0036] Indicated in the figure:

[0037] 1. Base; 2. Support vertical plate; 201. Oblique support plate; 3. Screening assembly; 30. Screening mechanism; 301. Drive motor; 302. Protective shell; 303. Screening bottom plate; 304. Screening plate; 305. Support ring; 306. Protective net; 307. Screening placement plate; 31. Feeding mechanism; 310. Feeding guide plate; 311. Baffle; 312. Electric guide rail; 313. Export plate; 314. Baffle plate; 32. Cleaning mechanism; 320, cleaning water pump; 321, water guide pipe; 322, cleaning top pipe; 323, cleaning bottom pipe; 324, hollow sprinkler plate; 325, cleaning brush; 326, arc guide plate; 327, cleaning mounting plate; 328, cleaning cotton strip; 329, magnetic mounting plate; 33, blocking mechanism; 330, blocking plate; 331, rubber blocking block; 332, positioning block; 333, guide moving rod; 334, reset spring. DETAILED DESCRIPTION

[0038] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0039] As described in the background art, the traditional material screening effect is poor, resulting in inconsistent melting rates when processing plastic particles of different sizes, which affects the strength and toughness of the product.

[0040] In order to solve this technical problem, the present invention provides a plastic particle feeding and screening machine, which is used for screening and feeding.

[0041] Specifically, please refer to Figure 1-Figure 12A plastic particle feeding and screening machine comprises a base 1 and four supporting upright plates 2 mounted on the base 1, a screening assembly 3 is arranged on the base 1, the screening assembly 3 comprises a screening mechanism 30 and a feeding mechanism 31, the screening mechanism 30 comprises a driving motor 301, a protective shell 302 and a screening bottom plate 303, the driving motor 301 and the protective shell 302 are both mounted on the base 1, the driving motor 301 is located in the protective shell 302, the screening bottom plate 303 is mounted on the output end of the driving motor 301, a plurality of screening plates 304 are mounted on the screening bottom plate 303, a waterproof cover sleeved on the surface of the plurality of screening plates 304 is mounted on the base 1, a plurality of screening holes are opened on the plurality of screening plates 304, a support ring 305 is connected to the top screening plate 304, a screening cover is mounted on the support ring 305, a protective net 306 is also sleeved on the plurality of screening plates 304, and at least three screening placement plates 307 are installed between the protective net 306 and the screening plate 304;

[0042] The feeding mechanism 31 includes a feeding guide plate 310, a baffle plate 311 and an electric guide rail 312. A plurality of feeding guide plates 310 are installed on the waterproof cover and the protective net 306. The baffle plate 311 is connected to the feeding guide plate 310. Two electric guide rails 312 are installed on the free surfaces of the plurality of feeding guide plates 310. A guide plate 313 is connected to the guide rail 312. Two baffle plates 314 that are in contact with the free surfaces of the feeding guide plates 310 are installed on the guide plate 313.

[0043] The four support plates 2 are connected with 202 installed with the base 1 through screws. The four support plates 2 are installed with 202, and 202 and the support plates 2 form a triangle shape.

[0044] After the plastic particles are poured into the screening mechanism 30, the screening cover can be closed by hand, and the driving motor 301 can be started to drive the screening bottom plate 303 to rotate at a high speed, thereby causing the screening plate 304 installed thereon to rotate synchronously. Under the strong centrifugal force generated by the rotation of the screening plate 304, the plastic particles will overcome the influence of friction and their own gravity and accelerate toward the edge of the screening plate 304. Since particles of different sizes have different masses, inertias, and interaction characteristics with the edges of the screening holes, they will have different behaviors when passing through the multiple screening holes opened on the screening plate 304. Smaller particles will pass through the screening holes. The particles are relatively light in weight and have small inertia. They are more likely to change their direction of movement under the drive of centrifugal force. When they are close to the screening holes, they can smoothly fall through the screening holes slightly larger than their particle size under the combined action of the centrifugal force and their own gravity, and enter the next level of screening or collection area. Larger particles have larger mass and inertia. Under the action of centrifugal force, their movement trajectory tends to remain straight forward and is not easily changed by smaller screening holes. When they move above the screening holes, they can be exported through the screening holes with the largest aperture at the top, thereby completing different screening operations of plastic particles;

[0045] At the same time, the protective shell 302 protects the driving motor 301, preventing external factors from damaging the motor and avoiding dangers caused by accidental contact of the operator with the motor. The support ring 305 is installed on the top screening plate 304 for installing the screening cover, which can prevent particles from splashing out during the screening process, ensuring that the screening is carried out in a relatively closed environment. The protective net 306 is set on the screening plate 304 through at least three screening placement plates 307. On the one hand, it can further prevent particles from accidentally flying out of the screening area, and on the other hand, it also plays a certain reinforcement and support role for the entire screening structure, ensuring the stability of the structure during the rotating screening process.

[0046] The feeding guide plate 310 is installed on the waterproof cover and the protective net 306. Its function is to guide the screened plastic particles to move in a specific direction to prepare for subsequent discharge. The baffle 311 is connected to the feeding guide plate 310, which can block and guide the flow of particles, allowing the particles to flow along the desired path to avoid particles from scattering everywhere. Two electric rails 312 are installed on the free surfaces of multiple feeding guide plates 310. The electric rails 312 are connected to the export plate 313. The electric drive function of the electric rails 312 can drive the export plate 313 to move, so that the screened plastic particles of different sizes on the feeding guide plate 310 can be transported to the corresponding position through the export plate 313 according to usage needs.

[0047] The present invention provides a plastic particle feeding and screening machine, which realizes multi-layer screening of plastic particles, stable operation of the equipment, efficient and orderly feeding, safe and reliable operation, and adaptability to various working conditions by providing screening plates 304 with different apertures, a stable driving motor 301 and its protective shell 302, a reasonable feeding guide plate 310 and an electric guide rail 312 device, an effective combination of a protective net 306 and a screening placement plate 307, and a waterproof cover with good sealing performance. At the same time, the electric guide rail 312 is used in the feeding mechanism 31 to realize electric conveying, which has greater flexibility than the traditional method of conveying by gravity or a fixed mechanical structure. The position and movement state of the export plate 313 can be conveniently adjusted according to actual production needs, and the screened plastic particles of different batches and different particle sizes can be conveyed to the corresponding collection container or the next processing step, thereby improving the degree of automation and production efficiency of the entire production process.

[0048] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.

[0049] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0050] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0051] Please refer to Figure 4-Figure 11, a plastic granule feeding and screening machine, wherein a plurality of screening plates 304 are provided with a cleaning mechanism 32, the cleaning mechanism 32 comprising a cleaning water pump 320, a water guide pipe 321 and a cleaning top pipe 322, the cleaning water pump 320 is mounted on the base 1, the output and input ends of the cleaning water pump 320 are both mounted with the water guide pipe 321, the cleaning top pipe 322 is connected to the screening cover, a feeding pipe connected to the screening cover is mounted on the cleaning top pipe 322, the cleaning top pipe 322 is connected with a cleaning bottom pipe 323 through a sealing bearing, the cleaning bottom pipe 323 is provided with two material throwing ports, a hollow water sprinkling plate 324 communicating with the water guide pipe 321 is mounted on the cleaning bottom pipe 323, and a plurality of cleaning brushes 325 are connected to the cleaning top pipe 322 and the cleaning bottom pipe 323; start the cleaning water pump 320, water is sucked from the input end of the cleaning water pump 320, and after being pressurized by the pump body, it flows from the output end through the water guide pipe 321 to the hollow water sprinkling plate 324, at this time, The plastic particles are poured into the feeding pipe above the screening cover, and the particles follow the pipe into the cleaning area composed of the cleaning top pipe 322 and the cleaning bottom pipe 323. As the water flows into the hollow water spraying plate 324, the water will be evenly sprayed on the plastic particles inside and around the cleaning bottom pipe 323, and the dirt, dust and other impurities on the surface of the particles will be preliminarily washed. At the same time, since the cleaning bottom pipe 323 and the multiple cleaning brushes 325 connected to the cleaning top pipe 322 will rotate with the rotation of the bottom pipe 323, the cleaning bottom pipe 323 will rotate with the screening plate 304, and the cleaning brushes 325 will fully contact with the particles, and further remove the impurities firmly attached to the surface of the particles through friction, so as to achieve deep cleaning. Under the action of centrifugal force, the cleaned plastic particles and wastewater will move to the edge of the cleaning bottom pipe 323, and finally be thrown out through the two throwing ports, enter the screening area below, and start the particle size screening and separation;

[0052] After the ejected plastic particles enter the screening plate 304 area, under the combined action of centrifugal force and gravity, particles of different sizes are graded and screened according to the screening holes on the screening plate 304. Smaller particles fall through the holes, while larger particles remain on the plate and continue to move, ultimately achieving classification and collection based on particle size. At the same time, the waste water generated by cleaning is stored in the waterproof cover and reused in conjunction with the cleaning water pump 320. Depending on the use of the waste water, it can be discharged through the drainage channel on the surface of the waterproof cover.

[0053] Through the synergistic effect of the water spraying system composed of the cleaning water pump 320, the water pipe 321, the hollow water spraying plate 324 and the cleaning brush 325, the plastic particles can be cleaned in an all-round and deep manner. The water spraying can remove dust and loose dirt on the surface of the particles, while the cleaning brush can effectively scrape off the oil stains, sticky impurities, etc. attached to the surface of the particles, which greatly improves the cleanliness of the plastic particles and provides purer raw materials for the subsequent production of plastic products, which helps to improve product quality and reduce product defects caused by impurities, such as bubbles, cracks, uneven color, etc. The cleaning mechanism 32 and the screening mechanism 30 are cleverly combined together to realize a continuous operation process of cleaning first and then screening in the same equipment.

[0054] Please refer to Figure 1-Figure 9 , a plastic particle feeding and screening machine, the number of screening plates 304 is three, the screening plates 304 are gradually enlarged away from the screening bottom plate 303, the aperture of the holes of the screening plates 304 is expanded from the bottom to the top, the three screening plates 307 and the splicing surface of the screening plates 304 are in a fitted state, the surfaces of the three screening plates 307 are provided with apertures corresponding to the three screening plates 304, and the upper surfaces of the screening plates 307 are inclined; under the action of centrifugal force, the plastic particles move toward the edge of the screening plate 304, because the aperture of the holes of the screening plate 304 is expanded from the bottom to the top, the smaller particles will first fall through the smaller aperture at the bottom and fall onto the corresponding screening plate 307 below, while the larger particles will continue to move upward along the screening plate 304 under the push of centrifugal force and pass through the larger aperture.

[0055] Through the design of the screening plate 304 and the screening placement plate 307, multi-level precise screening of plastic particles is achieved. The aperture of the screening plate 304 gradually increases from bottom to top, combined with centrifugal force, can preliminarily separate particles of different sizes. Then, the re-screening of the screening placement plate 307 and the guiding effect of the inclined surface further refine the particle classification, ensuring that particles of each particle size range can be accurately separated and collected, so that the particles can be quickly moved and screened between the screening plate 304 and the screening placement plate 307 under the action of centrifugal force. Compared with the traditional screening method with a single aperture or simple structure, the screening amount per unit time is greatly improved.

[0056] A plastic pellet feeding and screening machine is further optimized, specifically, as Figure 6-Figure 8As shown, there are three cleaning brushes 325 in total, one of which is located at the cleaning top pipe 322, and the other two cleaning brushes 325 are located at the cleaning bottom pipe 323. The cleaning top pipe 322 is in a ring shape and is distributed in the cleaning top pipe 322 and the cleaning bottom pipe 323. The apertures of the three cleaning top pipes 322 are distributed from large to small. The cleaning mechanism 32 also includes a cleaning mounting plate 327, cleaning cotton strips 328 and a magnetic mounting plate 329. The cleaning mounting plate 327 is mounted on a sealed bearing, and both ends of a plurality of cleaning cotton strips 328 are connected to the magnetic mounting plate 329. The cleaning cotton strips 328 are mounted on the cleaning mounting plate 327 through the magnetic mounting plate 329. The bottom magnetic mounting plate 329 is mounted on a mounting groove opened on the screening bottom plate 303. The end of the plurality of cleaning cotton strips 328 away from the cleaning mounting plate 327 is gradually enlarged. The particles are poured into the cleaning area from the feed pipe above the screening cover. The particles will first contact a cleaning brush 325 located at the cleaning top pipe 322. As the particles fall and the cleaning top pipe 322 and the cleaning bottom pipe 323 rotate, the cleaning brush 325 will perform preliminary scrubbing on the particles to remove larger impurities and loose dirt on the particle surface. At the same time, the sprayed water will wash away these impurities. The particles after preliminary cleaning continue to fall and enter the cleaning bottom pipe 323 area, and further contact the two cleaning brushes 325 here. Since the apertures of the three cleaning brushes are distributed from large to small, the particles will be scrubbed and screened to different degrees when passing through different aperture areas. Larger particles are focused on cleaning the large aperture area, and smaller particles pass through the small aperture area faster to avoid over-cleaning. At the same time, the particles begin to be distributed by size during the cleaning process.

[0057] At the same time, the cleaning mounting plate 327 installed on the sealed bearing is also rotating, driving multiple cleaning cotton strips 328 to move. The two ends of the cleaning cotton strips 328 are fixed by magnetic mounting plates 329. Under the action of centrifugal force, the end of the cleaning cotton strip 328 away from the cleaning mounting plate 327 gradually expands and fully contacts the particles. Its soft material can deeply clean the fine dirt and dust on the surface of the particles, further improving the cleaning effect, and the distribution of multiple cleaning cotton strips 328 also helps to comb and disperse the particles to prevent particles from agglomerating.

[0058] Through the reasonable layout of the three cleaning brushes 325 and the distribution of the aperture size, combined with the flushing of the water flow, the plastic particles can be efficiently pre-cleaned and graded to remove most of the impurities on the particle surface. The addition of multiple cleaning cotton strips 328 further enhances the cleaning ability. The design of the cleaning mounting plate 327, the cleaning cotton strips 328 and the magnetic mounting plate 329 takes into account the stability and maintenance convenience of the equipment. The magnetic mounting plate 329 makes the installation and replacement of the cleaning cotton strips 328 more convenient, while ensuring the stability of the cleaning cotton strips 328 during high-speed rotation, reducing equipment failures caused by loose or falling parts.

[0059] Further, such as Figure 6-Figure 9 The blocking mechanism 33 is shown in Figure 1, at the material throwing port of the cleaning bottom pipe 323, the cleaning bottom pipe 323 blocks the switch at the material throwing port through the blocking mechanism 33, the blocking mechanism 33 includes a blocking plate 330, a rubber blocking block 331 and a positioning block 332, the blocking plate 330 is symmetrically arranged at the material throwing port, the rubber blocking block 331 is installed on the blocking plate 330 at the material throwing port position, the positioning block 332 is installed on the cleaning bottom pipe 323, the positioning block 332 is connected to a guide moving rod 333 that passes through the blocking plate 330, and the guide moving rod 333 is installed with a reset spring 334 that is respectively connected to the positioning block 332 and the blocking plate 330 at both ends; when the cleaning mechanism 32 starts to work, the cleaning water pump 320 injects water into the cleaning bottom pipe 323, the driving motor 301 drives the cleaning bottom pipe 323 to rotate, and when the plastic particles are cleaned in the pipe, the blocking plate 33 0 continuously remains in a closed state, the rubber blocking block 331 effectively blocks the outflow of water and particles, ensuring that the cleaning process is carried out in a relatively closed environment, so that the water flow and particles can fully contact the cleaning brush 325 and the cleaning cotton strip 328, thereby achieving efficient cleaning. When the cleaning reaches a predetermined time or meets certain cleaning conditions, the cleaned particles need to be thrown out and enter the screening link. At this time, the cleaning bottom tube 323 is driven to rotate by the rotational force of the driving motor 301, so that the blocking plate 330 applies an external force to overcome the elastic force of the reset spring 334, so that the blocking plate 330 moves outward along the guide moving rod 333, thereby opening the throwing port, and the rubber blocking block 331 leaves the throwing port as the blocking plate 330 moves. The cleaned plastic particles and wastewater are thrown out through the throwing port under the action of centrifugal force and enter the screening mechanism 30 below.

[0060] The blocking mechanism 33 can accurately control the opening and closing of the material ejection port of the cleaning bottom pipe 323, ensuring that plastic particles and wastewater are ejected into the screening link only when needed, avoiding premature leakage of materials during the cleaning process. The cooperation of the positioning block 332 and the guide moving rod 333 provides a stable guide for the movement of the blocking plate 330, ensuring that it moves smoothly and accurately during the opening and closing process. The presence of the reset spring 334 can not only ensure that the blocking plate 330 is automatically reset when there is no external force.

[0061] A plastic pellet feeding and screening machine is further optimized, specifically, as Fig.11As shown, there are four return springs 334 in total, and the return springs 334 are symmetrically distributed at the bottom end of the cleaning bottom tube 323 in a group of two. The return springs 334 always maintain an inward pulling force on the blocking plate 330 to ensure that the blocking plate 330 will not be overly opened or shaken due to centrifugal force or other external forces. The four return springs 334 are evenly stressed and compressed, and their elastic force gradually increases to form a balance with the external thrust, so that the movement process of the blocking plate 330 is stable and controllable.

[0062] The two sets of symmetrically distributed return springs 334 provide balanced resistance and assistance during the opening and closing process of the blocking plate 330, making the movement of the blocking plate 330 more stable and smooth. When opening the material throwing port, the uniform compression of the spring can prevent the blocking plate 330 from getting stuck or tilted due to uneven force, ensuring that the material throwing port can be opened quickly and accurately to an appropriate degree, thereby improving the material throwing efficiency.

[0063] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0064] Obviously, the embodiments described above are only some embodiments of the present invention, rather than all embodiments. The preferred embodiments of the present invention are given in the accompanying drawings, but they do not limit the patent scope of the present invention. The present invention can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. Although the present invention has been described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific embodiments, or to perform equivalent replacements for some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of the present invention, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the present invention.

Claims

1. A plastic granule feeding and screening machine, comprising a base (1) and four supporting uprights (2) mounted on the base (1), characterized in that: The base (1) is provided with a screening component (3), the screening component (3) comprising a screening mechanism (30) and a feeding mechanism (31), the screening mechanism (30) comprising a driving motor (301), a protective shell (302) and a screening bottom plate (303), the driving motor (301) and the protective shell (302) being both mounted on the base (1), the driving motor (301) being located inside the protective shell (302), the screening bottom plate (303) being mounted on the output end of the driving motor (301), and the screening bottom plate (303) being mounted on the output end of the driving motor (301). 3) a plurality of screening plates (304) are mounted on the base (1), a waterproof cover mounted on the surface of the plurality of screening plates (304) is mounted on the base (1), a plurality of screening holes are opened on the plurality of screening plates (304), a support ring (305) is connected to the top of the screening plate (304), a screening cover is mounted on the support ring (305), a protective net (306) is mounted on the plurality of screening plates (304), and at least three screening placement plates (307) are installed between the protective net (306) and the screening plate (304); The feeding mechanism (31) comprises a feeding guide plate (310), a baffle (311) and an electric guide rail (312); a plurality of the feeding guide plates (310) are mounted on the waterproof cover and the protective net (306); the baffle (311) is connected to the feeding guide plate (310); two electric guide rails (312) are mounted on the free surfaces of the plurality of feeding guide plates (310); an outlet plate (313) is connected to the electric guide rail (312); and two baffle plates (314) are mounted on the outlet plate (313) and are in contact with the free surfaces of the feeding guide plates (310); The four supporting upright plates (2) are connected to (202) which are mounted on the base (1) via screws. The four supporting upright plates (2) are mounted with (202), and the (202) and the supporting upright plates (2) are distributed in a triangular shape.

2. A plastic granule feeding and screening machine according to claim 1, characterized in that: A cleaning mechanism (32) is provided in the plurality of screening plates (304), the cleaning mechanism (32) comprising a cleaning water pump (320), a water guide pipe (321) and a cleaning top pipe (322); the cleaning water pump (320) is mounted on the base (1); the output and input ends of the cleaning water pump (320) are both mounted on the water guide pipe (321); the cleaning top pipe (322) is connected to the screening cover; a feed pipe connected to the screening cover is mounted on the cleaning top pipe (322); the cleaning top pipe (322) is connected to a cleaning bottom pipe (323) via a sealing bearing; two material throwing ports are provided on the cleaning bottom pipe (323); a hollow water sprinkling plate (324) in communication with the water guide pipe (321) is mounted on the cleaning bottom pipe (323); and a plurality of cleaning brushes (325) are connected to the cleaning top pipe (322) and the cleaning bottom pipe (323).

3. A plastic granule feeding and screening machine according to claim 2, characterized in that: There are three screening plates (304) in total. The screening plates (304) gradually expand away from the screening bottom plate (303), and the hole diameters of the screening plates (304) expand from the bottom to the top.

4. A plastic granule feeding and screening machine according to claim 3, characterized in that: The joint surfaces of the three screening plates (307) and the screening plates (304) are in a fitted shape, the surfaces of the three screening plates (307) are provided with apertures corresponding to the three screening plates (304), and the upper surfaces of the screening plates (307) are inclined.

5. A plastic granule feeding and screening machine according to claim 4, characterized in that: There are three cleaning brushes (325) in total, one of which is located at the cleaning top tube (322), and the other two are located at the cleaning bottom tube (323). The cleaning top tube (322) is in a ring shape and is distributed inside the cleaning top tube (322) and the cleaning bottom tube (323). The apertures of the three cleaning top tubes (322) are distributed from large to small.

6. A plastic granule feeding and screening machine according to claim 2, characterized in that: The cleaning mechanism (32) further comprises a cleaning mounting plate (327), cleaning cotton strips (328) and a magnetic mounting plate (329); the cleaning mounting plate (327) is mounted on a sealed bearing; both ends of the plurality of cleaning cotton strips (328) are connected to the magnetic mounting plate (329); the cleaning cotton strips (328) are mounted on the cleaning mounting plate (327) via the magnetic mounting plate (329); the bottom end of the magnetic mounting plate (329) is mounted on a mounting groove provided on the screening bottom plate (303); and the ends of the plurality of cleaning cotton strips (328) away from the cleaning mounting plate (327) are gradually enlarged.

7. A plastic granule feeding and screening machine according to claim 6, characterized in that: A blocking mechanism (33) is provided at the material throwing port of the cleaning bottom pipe (323), and the cleaning bottom pipe (323) blocks the switch at the material throwing port through the blocking mechanism (33).

8. A plastic granule feeding and screening machine according to claim 7, characterized in that: The blocking mechanism (33) comprises a blocking plate (330), a rubber blocking block (331) and a positioning block (332); the blocking plate (330) is symmetrically arranged at the material throwing port; the rubber blocking block (331) is mounted on the blocking plate (330) at the material throwing port; the positioning block (332) is mounted on the cleaning bottom pipe (323); the positioning block (332) is connected to a guide movable rod (333) penetrating the blocking plate (330); and the guide movable rod (333) is mounted with a return spring (334) at both ends of which are respectively connected to the positioning block (332) and the blocking plate (330).

9. A plastic granule feeding and screening machine according to claim 8, characterized in that: The number of the return springs (334) is four in total, and the return springs (334) are arranged in groups of two and are symmetrically distributed at the bottom end of the cleaning bottom tube (323).

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