A particle raw material screening and crushing equipment for plastic processing

Abstract

The invention discloses a particle raw material screening and crushing device for plastic processing, relates to the field of plastic particle crushing, and solves the problem that the existing particle raw material screening and crushing device for plastic processing is difficult to synchronously screen and crush plastic particles of different sizes and hardness to the required size and mix and discharge when in use. The device comprises a tank body, a screening mechanism, a crushing mechanism and an output mechanism, wherein the screening mechanism comprises a screening plate and screening holes, and the crushing mechanism comprises a cutting knife and a driving shaft. The particle raw material screening and crushing device for plastic processing is convenient for separating a certain proportion of different plastic particles to different positions through the screening plate and the screening holes, and the cutting knife is controlled to rotate toward the back of the knife when the driving shaft rotates in the reverse direction through the crushing mechanism, so that each layer of plastic particles is stirred and screened, and multiple groups of cutting knives are combined to increase the contact area during stirring, and the cutting knife is controlled to rotate toward the blade when the driving shaft rotates in the forward direction to complete the crushing operation.

Description

Technical Field

[0001] The invention relates to the technical field of plastic particle crushing and processing, in particular to a particle raw material screening and crushing equipment for plastic processing. Background Art

[0002] Plastic is a polymer compound made of monomers through addition polymerization or condensation polymerization. It is commonly known as plastic or resin. It can freely change its composition and shape. It is composed of synthetic resin and additives such as fillers, plasticizers, stabilizers, lubricants, and colorants. Plastic particles have a wide range of applications. In daily life, plastic particles can be used to make various containers, toys, furniture, stationery and other daily necessities and various plastic industrial products. Plastic particles are classified into: PP, PE, PS, PVC, ABS, PA, etc.

[0003] During plastic processing, one or more plastic particles are generally melted and processed into shape. During processing, the size of plastic particles varies to a certain extent. At the same time, the hardness of different plastic particles varies. If they are directly mixed and melted, the melting efficiency is low. Some large-particle plastics need a long time to be heated to completely melt, which prolongs the melting waiting time during plastic processing, making it difficult to achieve the purpose of efficient and fast melting and injection molding. The existing granular raw material screening and crushing equipment for plastic processing directly crushes a large amount of plastic raw materials, resulting in some large-particle high-hardness plastics being over-crushed when the crushing is not thorough enough, and the small-particle plastics are over-crushed. The small-particle plastics are retained inside and affect the crushing efficiency of the large-particle plastics. Separately crushing different plastics will increase the workload and affect production efficiency. To this end, we propose a granular raw material screening and crushing equipment for plastic processing. Summary of the invention

[0004] The object of the present invention is to provide a granular raw material screening and crushing device for plastic processing, which is convenient for improving the mixing production efficiency of plastic granules of different particle sizes, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a particle raw material screening and crushing equipment for plastic processing, comprising a tank body, a discharge box is fixedly connected to the bottom end of the tank body, a fixed seat is fixedly connected to the bottom end of the discharge box, the screening mechanism comprises a plurality of groups of screening plates fixedly installed in the tank body, the plurality of groups of screening plates are evenly distributed at equal intervals, a plurality of groups of screening holes are evenly arranged on the screening plate, the aperture sizes of the screening holes on the same screening plate are the same, the aperture sizes of the screening holes on different layers of the screening plates decrease layer by layer from top to bottom, and the screening mechanism is used to separate plastic particles of different particle sizes into different sizes through the screening plates and the screening holes. At the same position, the crushing mechanism includes multiple groups of cutting knives installed in the tank body, and the tank body is rotatably connected with a driving shaft. The crushing mechanism is used to control the cutting knives to rotate toward the back of the knife when the driving shaft rotates in the opposite direction, so as to stir and screen the plastic particles in each layer, and merge multiple groups of the cutting knives to increase the contact area during stirring. When the driving shaft rotates forward, the cutting knives are controlled to rotate toward the blade side to complete the plastic particle crushing operation. The output mechanism is installed in the discharge box, and is used to mix, collect and store the crushed plastic particles, so as to improve the mixing production efficiency of plastic particles of different particle sizes.

[0006] Preferably, the crushing mechanism also includes a driving motor fixedly installed in the fixed seat, the output end of the driving motor is coaxially fixedly connected to the bottom end of the driving shaft, the upper end of the tank body is hinged with a top cover, the upper end of the tank body is fixedly connected with a fixing frame rotatably connected to the driving shaft, and control parts for controlling the rotation state of the cutting knife are provided between the top cover and the multiple layers of the screening plates, so as to drive the cutting knife to rotate in different directions.

[0007] Preferably, the control member includes a fixed ring fixedly mounted on the driving shaft, the outer wall of the driving shaft is rotatably connected to multiple groups of rotating rings, one group of cutting knives is fixedly mounted on the side of the fixed ring, the side surfaces of the multiple groups of rotating rings are respectively fixedly connected to one end of the two groups of cutting knives, the two groups of cutting knives on the same rotating ring are arranged at a certain angle and are not in the same plane, the fixed ring and the rotating ring are provided with rotating members for controlling the angle of the cutting knives on different planes, so as to facilitate the control of the rotation state of the cutting knives.

[0008] Preferably, the rotating member includes a plurality of drive blocks fixedly mounted on the fixed ring and the top surface of the rotating ring, the bottom surface of the rotating ring is provided with a plurality of arc grooves slidably connected to the outer wall of the drive block below, the rotating ring located at the uppermost side is fixedly connected with a mounting ring, the bottom surface of the screening plate is fixedly connected with a guide rod, the bottom end of the guide rod is fixedly connected with a limit ring rotatably connected to the outer wall of the drive shaft, the mounting ring is provided with a limit member for keeping the upper cutting knife in a relatively static state in the initial stage of rotation of the cutting knife until the plurality of drive blocks slide to the other end position of the arc groove and then release the limit, so as to be convenient for controlling the angle of the cutting knife on different planes.

[0009] Preferably, the limiting member includes a plurality of groups of snap-fit ​​blocks which are slidably connected to the mounting ring in a horizontal direction, and the outer walls of the limiting ring and the fixing frame are provided with a plurality of groups of triangular grooves which can be plugged into the snap-fit ​​blocks, and one end of the snap-fit ​​block is fixedly connected to a first spring which is fixedly connected to the mounting ring, so as to keep the upper cutting knife in a relatively static state in the initial stage of rotation of the cutting knife, and release the limit after the plurality of groups of driving blocks slide to the other end of the arc groove.

[0010] Preferably, the screening mechanism also includes a plurality of lifting frames installed in the tank body, the inner wall of the tank body is provided with a lifting groove which is slidably connected to the lifting frame in a vertical direction, the top of the lifting frame is fixedly connected to a plurality of pushing rods which can be plugged into the screening holes on the upper side, a plurality of reciprocating screw rods are fixedly connected to the driving shaft, the reciprocating screw rods pass through the lifting frame and are threadedly connected to the lifting frame, the guide rods pass through the lifting frame and are slidably connected to the lifting frame in a vertical direction, the upper and lower ends of the lifting frame are fixedly connected with bellows, the top of the bellows on the upper side is fixedly connected to the bottom surface of the adjacent screening plate, and the bottom surface of the bellows on the lower side is fixedly connected to the top surface of the limit ring, so as to prevent particles from being blocked in the screening holes.

[0011] Preferably, the output mechanism includes a lifting plate that is slidably connected to the inner wall of the discharge box in a vertical direction, and a plurality of connecting rods are fixedly connected to the lifting frame at the bottom end, and the bottom ends of the connecting rods are fixedly connected to the top surface of the lifting plate. The bottom surface of the tank body is rotatably connected with a bottom plate, and the bottom plate is fixedly connected to the outer wall of the driving shaft. The driving shaft passes through the lifting plate and is movably connected to the lifting plate. A mixing piece for mixing and outputting particles is provided on the bottom plate, and an output piece is provided in the discharge box to facilitate the control of unidirectional transportation of particles into the discharge box for collection and storage.

[0012] Preferably, the mixing element includes multiple groups of stirring rods fixedly installed on the upper and lower sides of the bottom plate, and the bottom plate is provided with multiple groups of through holes, in which a second spring is fixedly connected, and a sealing ball is fixedly connected to the top of the second spring to facilitate mixing and outputting the particles.

[0013] Preferably, the output member includes multiple groups of box doors hinged to the discharge box, the box doors are fixedly connected with a one-way valve, multiple groups of first filter screens are fixedly connected to the top cover, and the side of the one-way valve is fixedly connected with a second filter screen, so as to facilitate the removal of plastic particles in the discharge box.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The invention solves the problem that it is difficult to synchronously screen and crush plastic particles of different sizes and hardnesses to the required size and mix and discharge them when the existing particle raw material screening and crushing equipment for plastic processing is used. By setting a screening mechanism, a crushing mechanism and an output mechanism, it is convenient to separate a certain proportion of different plastic particles to different positions through a screening plate and a screening hole, and to eject the plastic particles in the screening hole during crushing and stirring to avoid blockage affecting screening. The crushing mechanism controls the cutting knife to rotate toward the back of the knife when the driving shaft rotates in the reverse direction, and stirs and screens the plastic particles of each layer, and merges multiple groups of cutting knives to increase the contact area during stirring. When the driving shaft rotates forward, the cutting knife is controlled to rotate toward the blade side to complete the plastic particle crushing operation, and the crushed plastic particles are mixed and collected and stored by the output mechanism. The device has a high degree of automation, is simple and quick to operate, does not require manual screening and classified crushing, realizes the functions of automatic screening and crushing, and automatically collects the crushed plastic particles, reduces the operation steps in the production process, improves the mixing and crushing efficiency of the plastic particles, facilitates the rapid melting and molding of the material after output, and improves the subsequent molding processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 It is a partial structural cross-sectional view of the present invention;

[0018] Figure 3 It is a schematic diagram of the internal structure of the present invention;

[0019] Figure 4 It is an exploded view of the local structure of the screening mechanism of the present invention;

[0020] Figure 5 It is a schematic diagram of the partial structure of the crushing mechanism of the present invention;

[0021] Figure 6 It is a schematic diagram of the local structure of the mixing element of the present invention;

[0022] Figure 7 for Figure 6 A magnified image of area A;

[0023] Figure 8 It is an exploded view of the local structure of the crushing mechanism of the present invention;

[0024] Fig. 9 It is a schematic diagram of the local structure of the rotating part of the present invention;

[0025] Fig.10 It is a schematic diagram of the local structure of the limiting member of the present invention;

[0026] Fig.11 It is a schematic diagram of the local structure of the output part of the present invention.

[0027] In the figure: 1-tank body; 2-discharging box; 3-fixed seat; 4-screening mechanism; 5-screening plate; 6-screening hole; 7-crushing mechanism; 8-cutting knife; 9-driving shaft; 10-output mechanism; 11-driving motor; 12-top cover; 13-fixed frame; 14-control part; 15-fixed ring; 16-rotating ring; 17-rotating part; 18-driving block; 19-arc groove; 20-mounting ring; 21-guide rod; 22-limiting ring; 23- Limiting piece; 24-clamping block; 25-triangular groove; 26-first spring; 27-lifting frame; 28-lifting groove; 29-pushing rod; 30-reciprocating screw rod; 31-bellows; 32-lifting plate; 33-connecting rod; 34-bottom plate; 35-mixing piece; 36-output piece; 37-stirring rod; 38-through hole; 39-second spring; 40-sealing ball; 41-box door; 42-check valve; 43-first filter screen; 44-second filter screen. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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 are within the scope of protection of the present invention. Example

[0029] See also Figure 1-Figure 11The granular raw material screening and crushing equipment for plastic processing shown in the figure includes a tank body 1, a screening mechanism 4, a crushing mechanism 7 and an output mechanism 10. The bottom end of the tank body 1 is fixedly connected to a discharge box 2, and the bottom end of the discharge box 2 is fixedly connected to a fixed seat 3. The screening mechanism 4 includes a plurality of groups of screening plates 5 fixedly installed in the tank body 1. The plurality of groups of screening plates 5 are evenly distributed at equal intervals. The screening plates 5 are evenly provided with a plurality of groups of screening holes 6. The aperture sizes of the screening holes 6 on the same screening plate 5 are the same. The aperture sizes of the screening holes 6 on different layers of the screening plates 5 decrease layer by layer from top to bottom. The screening mechanism 4 is used to screen different particles through the screening plates 5 and the screening holes 6. Plastic particles of different sizes are separated to different positions. The crushing mechanism 7 includes multiple groups of cutting knives 8 installed in the tank body 1. The tank body 1 is rotatably connected with a drive shaft 9. The crushing mechanism 7 is used to control the cutting knives 8 to rotate toward the back of the knife when the drive shaft 9 rotates in the reverse direction, so as to stir and screen the plastic particles in each layer, and merge multiple groups of cutting knives 8 to increase the contact area during stirring. When the drive shaft 9 rotates forward, the cutting knives 8 are controlled to rotate toward the blade side to complete the plastic particle crushing operation. The output mechanism 10 is installed in the discharge box 2, and is used to mix, collect and store the crushed plastic particles.

[0030] In this implementation plan, (the provisions of the attached Figure 6 In the top view of the embodiment, the driving shaft 9 rotates clockwise for reverse rotation and counterclockwise for forward rotation) a certain proportion of different plastic granule raw materials are poured into the tank body 1 together, and the crushing mechanism 7 controls the cutting knife 8 to rotate toward the back of the knife when the driving shaft 9 rotates in the reverse direction, and the plastic granules of each layer are stirred and screened, and multiple groups of cutting knives 8 are merged to increase the contact area during stirring, and the plastic granules of different sizes are separated to the sieve plates 5 of different layers through the sieve plates 5 and the sieve holes 6, and the plastic granules in the sieve holes 6 are ejected during crushing and stirring to avoid blockage affecting the screening, and the cutting knife 8 is controlled to rotate toward the blade side when the driving shaft 9 rotates forward to complete the plastic granule crushing operation, and the crushed plastic granules are mixed and collected and stored through the output mechanism 10. The device has a high degree of automation, simple and fast operation, no manual screening and classification crushing are required, and the functions of automatic screening and crushing are realized, and the crushed plastic granules are automatically collected, which reduces the operation steps in the production process, improves the mixing and crushing efficiency of the plastic granules, facilitates the rapid melting and molding of the material after output, and improves the subsequent molding processing efficiency. Example

[0031] See also Figure 1-Figure 5Embodiment 2 is described. This embodiment further describes Embodiment 1. The crushing mechanism 7 shown in the figure also includes a driving motor 11 fixedly installed in the fixing seat 3. The driving motor 11 is preferably of model YYHS-40. The output end of the driving motor 11 is coaxially fixedly connected to the bottom end of the driving shaft 9. A top cover 12 is hingedly provided at the upper end of the tank body 1. A fixing frame 13 rotatably connected to the driving shaft 9 is fixedly connected to the upper end of the tank body 1. A control member 14 for controlling the rotation state of the cutting knife 8 is provided between the top cover 12 and the multi-layer screening plate 5.

[0032] See also Figure 6-Figure 9 The control member 14 shown in the figure includes a fixed ring 15 fixedly mounted on the driving shaft 9, and a plurality of rotating rings 16 are rotatably connected to the outer wall of the driving shaft 9. A group of cutting knives 8 are fixedly mounted on the side of the fixed ring 15, and the side surfaces of the plurality of rotating rings 16 are respectively fixedly connected to one end of the two groups of cutting knives 8. The two groups of cutting knives 8 on the same rotating ring 16 are arranged at a certain angle and are not in the same plane. The fixed ring 15 and the rotating ring 16 are provided with a rotating member 17 for controlling the angle of the cutting knives 8 on different planes.

[0033] See also Figure 6-Figure 10 The rotating member 17 shown in the figure includes multiple groups of driving blocks 18 fixedly mounted on the top surfaces of the fixed ring 15 and the rotating ring 16, and multiple groups of arc grooves 19 are provided on the bottom surface of the rotating ring 16 to be slidably connected to the outer wall of the lower driving block 18. A mounting ring 20 is fixedly connected to the rotating ring 16 located on the uppermost side, and a guide rod 21 is fixedly connected to the bottom surface of the screening plate 5. The bottom end of the guide rod 21 is fixedly connected to a limit ring 22 rotatably connected to the outer wall of the driving shaft 9. The mounting ring 20 is provided with a limit member 23 for keeping the upper cutting knife 8 in a relatively static state in the initial stage of rotation of the cutting knife 8 until the multiple groups of driving blocks 18 slide to the other end position of the arc groove 19 and release the limit. The limit member 23 includes multiple groups of clamping blocks 24 slidably connected to the mounting ring 20 in the horizontal direction. The outer walls of the limit ring 22 and the fixed frame 13 are provided with multiple groups of triangular grooves 25 that can be plugged into the clamping block 24. One end of the clamping block 24 is fixedly connected to a first spring 26 fixedly connected to the mounting ring 20.

[0034] In this embodiment, the top cover 12 is opened, and the plastic particles are poured into the tank body 1 together. The larger plastic particles will be retained on the upper sieve plate 5, and the smaller ones can enter the lower sieve plate 5 through the upper sieve holes 6. The screening is carried out in this cycle, and the drive motor 11 is started to drive the drive shaft 9 to rotate in the opposite direction, driving the fixed ring 15 to rotate first. Since the uppermost rotating ring 16 on each group of control parts 14 is limited by the clamping block 24 to the triangular groove 25, the mounting ring 20 and the upper rotating ring 16 initially maintain a relatively static state, and the lower driving block 18 rotates to the other end of the arc groove 19, thereby driving the upper layer The rotating ring 16 rotates, and at this time, the cutting knife 8 on the lower layer and the group of cutting knives 8 on the upper right side are in the same vertical plane, and the backs of the knives are aligned. Then the rotating ring 16 on the upper side drives the driving block 18 to rotate a certain angle, so that the rotating ring 16 on the upper layer rotates, and this progresses until the rotating ring 16 on the uppermost layer is rotated by the thrust of the lower driving block 18 on the arc groove 19, and the clamping block 24 slides out of the triangular groove 25. At this time, the cutting knives 8 are grouped in pairs, and the backs of the knives are vertically aligned, which stirs and pushes the plastic particles on the screening plate 5 of this layer, thereby improving the screening efficiency of the plastic particles and allowing plastic particles of different sizes to fall onto the screening plates 5 of different layers.

[0035] It is worth noting that after the stirring and screening is completed, the driving motor 11 drives the driving shaft 9 to rotate forward, so that the driving block 18 can slide to the other side of the arc groove 19, and the cutting knife 8 originally on the same vertical plane is rotated by a certain angle to stagger, thereby improving the crushing efficiency, so that particles at different heights can be cut and crushed by the cutting knife 8. When the driving shaft 9 rotates rapidly, the rotating ring 16 and the mounting ring 20 will rotate synchronously under the drive of the driving block 18 below. The rapid rotation of the mounting ring 20 causes the clamping block 24 to generate centrifugal force and compress the first spring 26, so that when the driving shaft 9 rotates rapidly, the clamping block 24 will not continuously impact the triangular groove 25. Only when the driving shaft 9 slows down and stops, the clamping block 24 will be ejected and clamped with the triangular groove 25 to limit the position, thereby avoiding the situation where the relative rotation angle between the rotating rings 16 is uneven due to the friction between the rotating rings 16, and the cutting knife 8 is difficult to be evenly distributed, affecting the crushing efficiency. Example

[0036] See also Figure 1-Figure 8Embodiment 3 is described. This embodiment further describes Embodiment 1. The screening mechanism 4 shown in the figure also includes a plurality of lifting frames 27 installed in the tank body 1. The inner wall of the tank body 1 is provided with lifting grooves 28 which are slidably connected to the lifting frames 27 in the vertical direction. The top of the lifting frames 27 is fixedly connected with a plurality of pushing rods 29 which can be plugged into the upper screening holes 6. The driving shaft 9 is fixedly connected with a plurality of reciprocating screw rods 30. The reciprocating screw rods 30 pass through the lifting frames 27 and are threadedly connected to the lifting frames 27. The guide rods 21 pass through the lifting frames 27 and are slidably connected to the lifting frames 27 in the vertical direction. The upper and lower ends of the lifting frames 27 are fixedly connected with bellows 31. The top of the upper bellows 31 is fixedly connected to the bottom surface of the adjacent screening plate 5, and the bottom surface of the lower bellows 31 is fixedly connected to the top surface of the limit ring 22.

[0037] See also Figure 1-Figure 5 The output mechanism 10 shown in the figure includes a lifting plate 32 that is slidably connected to the inner wall of the discharge box 2 in the vertical direction. A plurality of connecting rods 33 are fixedly connected to the lifting frame 27 at the bottom end. The bottom ends of the connecting rods 33 are fixedly connected to the top surface of the lifting plate 32. A bottom plate 34 is rotatably connected to the bottom surface of the tank body 1. The bottom plate 34 is fixedly connected to the outer wall of the driving shaft 9. The driving shaft 9 passes through the lifting plate 32 and is movably connected to the lifting plate 32. A mixing piece 35 for mixing and outputting particles is provided on the bottom plate 34, and an output piece 36 is provided in the discharge box 2.

[0038] See also Figure 1-Figure 11 The mixing element 35 shown in the figure includes multiple groups of stirring rods 37 fixedly installed on the upper and lower sides of the bottom plate 34, multiple groups of through holes 38 are opened on the bottom plate 34, and a second spring 39 is fixedly connected in the through hole 38. A sealing ball 40 is fixedly connected to the top of the second spring 39. The output element 36 includes multiple groups of box doors 41 hinged to the discharge box 2, and a one-way valve 42 is fixedly connected to the box door 41. Multiple groups of first filter screens 43 are fixedly connected to the top cover 12, and a second filter screen 44 is fixedly connected to the side of the one-way valve 42.

[0039] In this embodiment, when the driving shaft 9 rotates, the reciprocating screw rod 30 is driven to rotate, so that the lifting frame 27 is continuously lifted and lowered in the lifting slot 28, ensuring that the push rod 29 can be continuously lifted and lowered during reverse rotation screening and forward rotation cutting to clear the screening holes 6, thereby preventing some plastic particles with a particle size similar to that of the screening holes 6 from being blocked in the screening holes 6 and affecting the screening efficiency. By setting two sets of bellows 31, when the lifting frame 27 is lifted and lowered, the reciprocating screw rod 30 is in a continuously wrapped state to prevent dust from entering. The lifting frame 27 drives the connecting rod 33 to make the lifting plate 32 lift and lower synchronously. Thereby, the air pressure in the discharge box 2 is squeezed. When the lifting plate 32 moves downward, the air pressure in the discharge box 2 is reduced, and the plastic particles falling on the bottom plate 34 are stirred by the bottom plate 34 and the stirring rod 37 and then drawn downward into the discharge box 2 through the through hole 38. When the lifting plate 32 moves upward, the gas in the discharge box 2 is compressed, so that the gas is filtered by the second filter screen 44 and discharged to the outside through the one-way valve 42, and the plastic particles continue to remain in the discharge box 2 and are stirred and mixed by the stirring rod 37. At this time, the increase in air pressure in the discharge box 2 will cause the sealing ball 40 to be lifted up, blocking the through hole 38, thereby preventing the particles in the discharge box 2 from flowing back into the upper tank body 1.

[0040] It is worth noting that: through the setting of the first filter 43, the airflow is realized to flow in one direction, the particles are continuously transported into the discharge box 2, and suction is intermittently generated at the bottom, so that the plastic particles crushed to the set size on the upper side are screened to the next layer, until all the plastic particles pass through the screening holes 6 of the lowest layer, indicating that the plastic particles are all crushed to the required size, and when the lifting plate 32 is at the bottom position of the discharge box 2, the operation of the drive motor 11 is stopped, and the box door 41 is opened, the plastic particles in the discharge box 2 can be taken out and packaged, completing the production and processing process without the need for multiple devices to operate, thereby improving production efficiency while reducing equipment costs, and avoiding the situation where the different degrees of plastic particle crushing affect later use.

[0041] The through hole 38 is designed only for the plastic particles to be crushed into an extremely fine state. When the desired final shape of the particles is larger (diameter greater than 1 mm), the through hole 38 can also adopt a conical design with a wide top and a narrow bottom, so that the plastic particles are difficult to move upward and discharged after falling to the bottom. At this time, the one-way conveying operation of larger particles of plastic can also be realized.

[0042] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A granular raw material screening and crushing equipment for plastic processing, characterized in that: include: A tank body (1), the bottom end of the tank body (1) being fixedly connected to a discharge box (2), and the bottom end of the discharge box (2) being fixedly connected to a fixing seat (3); Also includes: A screening mechanism (4), the screening mechanism (4) comprising a plurality of groups of screening plates (5) fixedly mounted in the tank body (1), the plurality of groups of screening plates (5) being evenly distributed at equal intervals, the screening plates (5) being evenly provided with a plurality of groups of screening holes (6), the screening holes (6) on the same screening plate (5) having the same aperture size, and the apertures of the screening holes (6) on different layers of the screening plates (5) decreasing layer by layer from top to bottom, so as to separate plastic particles of different particle sizes to different positions through the screening plates (5) and the screening holes (6); A crushing mechanism (7), the crushing mechanism (7) comprising a plurality of groups of cutting knives (8) installed in the tank body (1), the tank body (1) being rotatably connected to a drive shaft (9), for controlling the cutting knives (8) to rotate toward the back of the knives when the drive shaft (9) rotates in the reverse direction, thereby stirring and screening the plastic particles of each layer, and merging the plurality of groups of cutting knives (8) to increase the contact area during stirring, and controlling the cutting knives (8) to rotate toward the blade side when the drive shaft (9) rotates in the forward direction, thereby completing the operation of crushing the plastic particles; The output mechanism (10) is installed in the discharge box (2) and is used to mix, collect and store the crushed plastic particles. The crushing mechanism (7) also includes a drive motor (11) fixedly installed in the fixed seat (3). The output end of the drive motor (11) is coaxially fixedly connected to the bottom end of the drive shaft (9). The upper end of the tank body (1) is hinged with a top cover (12). The upper end of the tank body (1) is fixedly connected with a fixing frame (13) rotatably connected to the drive shaft (9). A control member (14) for controlling the rotation state of the cutting knife (8) is provided between the top cover (12) and the multiple layers of the screening plate (5). The control member (14) includes a fixed mounting. A fixed ring (15) is mounted on a driving shaft (9), the outer wall of the driving shaft (9) is rotatably connected to a plurality of rotating rings (16), a group of cutting knives (8) is fixedly mounted on a side surface of the fixed ring (15), the side surfaces of the plurality of rotating rings (16) are respectively fixedly connected to one end of two groups of cutting knives (8), the two groups of cutting knives (8) on the same rotating ring (16) are arranged at a certain angle and are not located in the same plane, the fixed ring (15) and the rotating ring (16) are provided with a rotating member (17) for controlling the angle of the cutting knives (8) on different planes, the rotating member (17) comprising a plurality of driving blocks fixedly mounted on the top surfaces of the fixed ring (15) and the rotating ring (16). (18), the bottom surface of the rotating ring (16) is provided with a plurality of groups of arc grooves (19) slidably connected to the outer wall of the driving block (18) below, the rotating ring (16) located at the uppermost side is fixedly connected to a mounting ring (20), the bottom surface of the screening plate (5) is fixedly connected to a guide rod (21), the bottom end of the guide rod (21) is fixedly connected to a limit ring (22) rotatably connected to the outer wall of the driving shaft (9), the mounting ring (20) is provided with a limit member (23) for keeping the upper side cutting knife (8) in a relatively static state in the initial stage of the rotation of the cutting knife (8) until the plurality of groups of driving blocks (18) slide to the other end position of the arc groove (19), the screening mechanism ( 4) also includes a plurality of lifting frames (27) installed in the tank body (1), the inner wall of the tank body (1) is provided with a lifting groove (28) connected to the lifting frame (27) in a vertical sliding direction, the top of the lifting frame (27) is fixedly connected to a plurality of pushing rods (29) that can be plugged into the upper screening holes (6), the driving shaft (9) is fixedly connected to a plurality of reciprocating screw rods (30), the reciprocating screw rods (30) pass through the lifting frame (27) and are threadedly connected to the lifting frame (27), the guide rod (21) passes through the lifting frame (27) and is connected to the lifting frame (27) in a vertical sliding direction, and the upper and lower ends of the lifting frame (27) are fixedly connected to bellows (31),The top end of the upper bellows (31) is fixedly connected to the bottom surface of the adjacent sieve plate (5), and the bottom surface of the lower bellows (31) is fixedly connected to the top surface of the limit ring (22). The output mechanism (10) comprises a lifting plate (32) slidably connected to the inner wall of the discharge box (2) in the vertical direction. The lifting frame (27) at the bottom end is fixedly connected to a plurality of connecting rods (33). The bottom ends of the connecting rods (33) are fixedly connected to the top surface of the lifting plate (32). The bottom surface of the tank body (1) is rotatably connected to a bottom plate (34). The bottom plate (34) is fixedly connected to the outer wall of the drive shaft (9). The drive shaft (9) passes through the lifting plate (32) and is movably sleeved with the lifting plate (32). A mixing member (35) for mixing and outputting particles is provided on the bottom plate (34). An output member (36) is provided in the discharge box (2).

2. The granular material screening and crushing equipment for plastic processing according to claim 1 is characterized in that: The limiting member (23) comprises a plurality of groups of clamping blocks (24) slidably connected to the mounting ring (20) in a horizontal direction, the outer walls of the limiting ring (22) and the fixing frame (13) are provided with a plurality of groups of triangular grooves (25) capable of being plugged into the clamping blocks (24), and one end of the clamping block (24) is fixedly connected to a first spring (26) fixedly connected to the mounting ring (20).

3. The granular material screening and crushing equipment for plastic processing according to claim 1 is characterized in that: The mixing element (35) comprises a plurality of stirring rods (37) fixedly mounted on the upper and lower sides of the bottom plate (34); the bottom plate (34) is provided with a plurality of through holes (38); a second spring (39) is fixedly connected in the through holes (38); and a sealing ball (40) is fixedly connected to the top end of the second spring (39).

4. The granular material screening and crushing equipment for plastic processing according to claim 1, characterized in that: The output member (36) comprises a plurality of boxes doors (41) hinged to the discharge box (2), a one-way valve (42) being fixedly connected to the box door (41), a plurality of first filter screens (43) being fixedly connected to the top cover (12), and a second filter screen (44) being fixedly connected to the side of the one-way valve (42).

Images