Plastic particle dynamic mixing and granulating equipment capable of controlling proportion of multiple raw materials

Abstract

The invention relates to the technical field of plastic particle mixing and granulation, in particular to multi-raw-material-proportion-controllable plastic particle dynamic mixing and granulation equipment which comprises a rack, and a mixer used for stirring and mixing multi-component plastic raw materials and achieving uniform fusion of the raw materials is fixedly installed in the rack. A mounting frame used for providing a stable bearing foundation and supporting follow-up component mounting is fixedly mounted at the top of the rack, and a first motor in the cone stock bin drives an annular toothed plate to be meshed with a gear to drive the built-in stock bin to rotate (protruding blocks on the inner side wall of the built-in stock bin increase the dispersion degree of plastic particles); and a second motor drives a limiting cylinder to form composite motion of rotation and up-and-down reciprocating (driving a stirring blade to reversely and circumferentially rotate around a vertical rod and periodically open and close), so that layering of multiple raw materials is broken through multiple effects of reverse shearing, opening and closing rubbing and dispersed impact, and a high-uniformity raw material basis is provided for granulation.

Description

Technical Field

[0001] This invention relates to the field of plastic granulation technology, specifically to a dynamic mixing and granulation equipment for plastic granules with controllable proportions of multiple raw materials. Background Technology

[0002] Dynamic mixing and granulation equipment for plastic granules is a key piece of equipment in the plastics processing industry. Its core purpose is to transform various plastic raw materials into standardized plastic granules with uniform composition and stable performance through efficient mixing and modification, meeting the raw material requirements of subsequent injection molding, extrusion and other molding processes. The process is roughly as follows: First, various raw materials are fed into the feeding system according to the formula ratio and then enter the dynamic mixing chamber through the conveying device. Inside the chamber, a high-speed rotating rotor, combined with a high-temperature environment, shears, kneads and melts the materials, achieving full dispersion and performance modification of different components. The molten, uniform material is then conveyed to the extrusion mechanism and extruded into continuous strips through a die. Finally, the strips are cut into granules of fixed length by the pelletizing device. After cooling and drying, the granules are collected as ready-to-use finished plastic granules.

[0003] Currently, in the field of raw material pretreatment for multi-raw material plastic granulation and compounding, technical solutions generally suffer from insufficient mixing uniformity and poor process synergy, making it difficult to adapt to the production requirements of controllable proportions of multi-component raw materials. On the one hand, traditional mixing equipment lacks a raw material pre-dispersion structure, making it prone to agglomeration and stratification when multiple raw materials are fed into a single silo; the stirring components are single-powered fixed rotations without periodic opening and closing or compound motion, resulting in insufficient particle shearing and kneading, low mixing uniformity, and long mixing time. On the other hand, the connection between power transmission and conveying is loose, with silos and stirring relying on independent power sources, leading to asynchronous cycle times; raw materials rely on gravity transfer, making them prone to secondary stratification, and the lack of reverse motion to enhance dispersion limits proportion control and affects the synergy of mixing and granulation.

[0004] Therefore, developing a new type of mixing equipment with a pre-dispersion structure, combined power transmission and reverse motion is of urgent significance for improving the mixing quality of multiple raw materials and enhancing the controllability of proportions. Summary of the Invention

[0005] The purpose of this invention is to provide a dynamic mixing and granulation equipment for plastic granules with controllable proportions of multiple raw materials, in order to solve the problems mentioned in the background art above.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A dynamic mixing and granulation equipment for plastic granules with controllable proportions of multiple raw materials includes a frame. Inside the frame, a mixer is fixedly installed for stirring and mixing multiple plastic raw materials to achieve uniform fusion of the raw materials. On the top of the frame, a mounting frame is fixedly installed to provide a stable bearing foundation and support the installation of subsequent components.

[0008] The inner side of the mounting frame is fixedly installed with a conical hopper for temporarily storing plastic raw materials to be mixed and ensuring smooth material feeding. The conical hopper is connected to a pipe through the inlet at its bottom for accurately conveying the plastic raw materials to be mixed to the feed end of the mixer and ensuring the sealing and continuity of the material conveying.

[0009] A housing is fixedly installed on the bottom inner wall of the mounting frame, and a cover for dust protection of the conical hopper is fixedly installed on the inner side wall of the mounting frame. The cover is fixedly installed with a feed pipe for conveying different types / specifications of plastic raw materials through a slot on its side wall.

[0010] Furthermore, multiple sets of brackets fixed to the inner wall of the chassis are rotatably connected to a drive worm gear and a transmission worm wheel. A push plate is rotatably connected to the inner wall of the chassis. Both sides of the push plate are movably connected to a pull rod via bearings. A drive ring is fixedly connected to the bottom end of the pull rod. Eccentric wheels are fixedly connected to both sides of the transmission worm wheel, and the eccentric wheels are rotatably connected inside the drive ring.

[0011] Furthermore, an installation sleeve is fixedly connected to the inner side of one end of the push plate, and two ball bearings are movably connected inside the installation sleeve, with the top and bottom of the ball bearings exposed on the outer side of the installation sleeve.

[0012] Furthermore, a transmission shaft with a regular polygonal cross-section is fixedly connected to the top of the transmission worm gear, and a matching limiting cylinder is slidably connected to the outside of the transmission shaft. A linkage ring is fixedly sleeved on the outside of the limiting cylinder, and the ball bearings are located in the inner cavity of the linkage ring.

[0013] Furthermore, the top end of the limiting cylinder passes through the top of the chassis and the bottom of the pipe in sequence, and extends into the inner cavity of the pipe.

[0014] Furthermore, the top of the limiting cylinder is rotatably connected to two rotating rods, the top of the rotating rods is rotatably connected to a stirring blade, the bottom center of the cover is rotatably connected to a turntable, the bottom end of the turntable is fixedly connected to a vertical rod, and the side wall of the stirring blade is rotatably connected to the side wall of the vertical rod.

[0015] Furthermore, an inner hopper is rotatably connected to the inner side of the conical hopper, and the inner wall of the inner hopper is provided with protrusions. An annular toothed plate is fixedly connected to the top of the inner hopper. A first motor is fixedly installed on the side wall of the cover. A gear that meshes with the annular toothed plate is fixedly connected to the output end of the first motor. A second motor for driving the active worm gear to rotate is fixedly installed at the bottom of the inner cavity of the machine housing.

[0016] Furthermore, the bottom end of the pipe is connected to the mixer, and the end of the discharge pipe away from the cover is connected to an external raw material supply mechanism.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] This equipment employs a multi-dimensional mixing process combining pre-dispersion and dynamic composite stirring. The internal hopper within the conical hopper achieves stable rotation via a ring-shaped toothed plate and gear meshing structure driven by a first motor. Protrusions on its inner wall continuously impact and lift the plastic granules as the hopper rotates, significantly increasing the granule agitation and dispersion. The limiting cylinder, driven by a second motor, performs a composite motion of rotation and reciprocating motion. This motion involves both driving the stirring blades to rotate around a vertical rod (in the opposite direction to the internal hopper) via a rotating rod, and periodically opening and closing the stirring blades as the limiting cylinder moves up and down. The combined effects of reverse shearing, opening and closing kneading, and dispersing impact thoroughly break down the stratification of different raw materials, providing a highly uniform raw material base for granulation. Attached Figure Description

[0019] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings;

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the cone-shaped silo structure in this invention;

[0022] Figure 3 This is a cross-sectional view of the pipe structure in this invention;

[0023] Figure 4 This is a schematic diagram showing the connection between the rotating rod and the stirring plate in this invention;

[0024] Figure 5 This is a schematic diagram of the limiting cylinder structure in this invention;

[0025] Figure 6 This is a schematic diagram of the annular toothed plate structure in this invention;

[0026] Figure 7 This is a schematic diagram of the ball bearing structure in this invention;

[0027] Figure 8 This is a schematic diagram of the cone-shaped silo and the built-in silo structure in this invention.

[0028] Reference numerals: 1. Frame; 2. Mixer; 3. Mounting frame; 4. Conical hopper; 5. Pipeline; 6. Chassis; 7. Driving worm gear; 8. Transmission worm wheel; 9. Push plate; 10. Feed pipe; 11. Tie rod; 12. Drive ring; 13. Eccentric wheel; 14. Mounting sleeve; 15. Ball bearing; 16. Drive shaft; 17. Limiting cylinder; 18. Linkage ring; 19. Mixing blade; 20. Turntable; 21. Vertical rod; 22. Internal hopper; 23. Protrusion; 24. Annular toothed plate; 25. Gear; 26. Cover; 27. Rotating rod. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Example 1: As Figures 1-8 As shown, the dynamic mixing and granulation equipment for plastic granules with controllable proportions of multiple raw materials achieves precise delivery and efficient mixing of multi-component plastic granules through a continuous process of "raw material pre-dispersion → power compounding and transmission → dynamic stirring and conveying → final fusion", providing a uniform raw material base for subsequent granulation.

[0031] Specifically, it includes a frame 1, inside which a mixer 2 is fixedly installed for mixing and blending multi-component plastic raw materials to achieve uniform fusion of the raw materials, and on the top of the frame 1 a mounting frame 3 is fixedly installed to provide a stable load-bearing foundation and support the installation of subsequent components.

[0032] The inner side of the mounting frame 3 is fixedly installed with a conical hopper 4 for temporarily storing plastic raw materials to be mixed and ensuring smooth material feeding. The conical hopper 4 is connected to a pipe 5 through the inlet at its bottom for accurately conveying the plastic raw materials to be mixed to the feed end of the mixer 2 and ensuring the sealing and continuity of the material conveying.

[0033] The inner side of the cone-shaped hopper 4 is rotatably connected to an internal hopper 22. The inner side wall of the internal hopper 22 is provided with a protrusion 23. The top of the internal hopper 22 is fixedly connected to an annular toothed plate 24. The side wall of the cover 26 is fixedly installed with a first motor. The output end of the first motor is fixedly connected to a gear 25 that meshes with the annular toothed plate 24.

[0034] A housing 6 is fixedly installed on the bottom inner wall of the mounting frame 3. A cover 26 for dust protection of the conical hopper 4 is fixedly installed on the inner side wall of the mounting frame 3. A feed pipe 10 for conveying different types / specifications of plastic raw materials is fixedly installed on the cover 26 through a slot on its side wall. The bottom end of the pipe 5 is connected to the mixer 2, and the end of the feed pipe 10 away from the cover 26 is connected to an external raw material supply mechanism.

[0035] Example 2: Figure 3 , Figure 4 , Figure 5As shown, multiple sets of brackets fixed to the inner wall of the chassis 6 are rotatably connected to the drive worm gear 7 and the transmission worm wheel 8. The inner wall of the chassis 6 is rotatably connected to the push plate 9. Both sides of the push plate 9 are movably connected to the pull rod 11 through the bearing. The bottom end of the pull rod 11 is fixedly connected to the drive ring 12. Both sides of the transmission worm wheel 8 are fixedly connected to the eccentric wheel 13, which is rotatably connected inside the drive ring 12.

[0036] A mounting sleeve 14 is fixedly connected to the inner side of one end of the push plate 9. Two balls 15 are movably connected inside the mounting sleeve 14, and the top and bottom of the balls 15 are exposed on the outer side of the mounting sleeve 14.

[0037] The top of the transmission worm gear 8 is fixedly connected to a transmission shaft 16 with a regular polygonal cross section. A matching limiting sleeve 17 is slidably connected to the outside of the transmission shaft 16. A linkage ring 18 is fixedly sleeved on the outside of the limiting sleeve 17, and the ball bearing 15 is located in the inner cavity of the linkage ring 18.

[0038] The top of the limiting cylinder 17 passes through the top of the casing 6 and the bottom of the pipe 5, and extends into the inner cavity of the pipe 5. Two rotating rods 27 are rotatably connected to the top of the limiting cylinder 17. A stirring blade 19 is rotatably connected to the top of the rotating rod 27. A turntable 20 is rotatably connected to the bottom center of the cover 26. A vertical rod 21 is fixedly connected to the bottom end of the turntable 20. The side wall of the stirring blade 19 is rotatably connected to the side wall of the vertical rod 21. A second motor for driving the rotation of the active worm gear 7 is fixedly installed at the bottom of the inner cavity of the casing 6.

[0039] Combining Embodiment 1 and Embodiment 2, the working principle of the present invention is as follows:

[0040] First, based on the preset multi-raw material mixing requirements, different types and specifications of plastic granules are precisely conveyed into the built-in hopper 22 inside the conical hopper 4 through multiple sets of feed pipes 10 on the side wall of the cap 26. Simultaneously, the first motor starts working: its output drives the gear 25 to rotate, and the gear 25 meshes with the annular toothed plate 24 on the top of the built-in hopper 22, thereby driving the entire built-in hopper 22 to rotate stably within the conical hopper 4. As the hopper rotates, the protrusions 23 on the inner side wall of the built-in hopper 22 continuously impact and lift the plastic granules, significantly increasing the granule's agitation and dispersion, preventing the raw materials from clumping due to inter-granule adhesion.

[0041] While the raw materials are pre-dispersed, the second motor inside the casing 6 starts and drives the active worm gear 7 connected to its output end to rotate. The active worm gear 7 drives the transmission worm wheel 8 to rotate synchronously. On the one hand, the eccentric wheels 13 on both sides of the transmission worm wheel 8 rotate together with the transmission worm wheel 8. The eccentric wheels 13 make eccentric circular motion inside the drive ring 12. By pushing the drive ring 12 to move up and down, it drives the pull rod 11 fixed to the drive ring 12 to move back and forth. Finally, the push plate 9 connected to the top of the pull rod 11 achieves periodic reciprocating deflection motion with its rotation axis as the center.

[0042] On the other hand, the polygonal drive shaft 16 at the top of the active worm gear 7 rotates synchronously. Since the drive shaft 16 and the outer limiting cylinder 17 are fitted and slidably connected (the polygonal structure ensures torque transmission), the drive shaft 16 directly drives the limiting cylinder 17 to rotate in the same direction. In addition, the reciprocating deflection of the push plate 9 is transmitted to the linkage ring 18 through the ball bearings 15 in its inner mounting sleeve 14 (the ball bearings 15 are engaged in the inner cavity of the linkage ring 18 and can roll freely), thereby driving the limiting cylinder 17 to move up and down reciprocally along the axial direction of the drive shaft 16. Finally, the limiting cylinder 17 forms a composite motion of "rotational motion + up and down reciprocating motion", and its connection with the housing 6 and the pipe 5 is sealed to ensure that there is no leakage or dust overflow during the material conveying process.

[0043] The combined motion of the limiting cylinder 17 directly drives the mixing blades 19 in the pipe 5 and the conical hopper 4, forming a multi-dimensional dynamic mixing effect, while also assisting in the smooth transport of raw materials. The top of the limiting cylinder 17 extends into the inner cavity of the pipe 5, and two sets of rotating rods 27 rotatably connected to its outer side are respectively connected to the mixing blades 19. The side wall of the mixing blades 19 is connected to the vertical rod 21 at the bottom of the turntable 20 (the turntable 20 is rotatably installed at the bottom of the cover 26 to provide fixed support for the vertical rod 21).

[0044] When the limiting cylinder 17 moves upwards and reciprocates, the rotating rod 27 is pushed upwards, causing the opening and closing angle of the two sets of stirring blades 19 to increase; when the limiting cylinder 17 moves downwards and reciprocates, the rotating rod 27 is pulled down, and the opening and closing angle of the stirring blades 19 decreases, realizing the periodic opening and closing action of the stirring blades 19. At the same time, the rotational motion of the limiting cylinder 17 drives the stirring blades 19 to rotate around the vertical rod 21 through the rotating rod 27, and the direction of the rotation of the stirring blades 19 is opposite to the direction of rotation of the built-in hopper 22. This reverse motion, combined with the periodic opening and closing of the stirring blades 19, and the particle jumping caused by the protrusions 23 in the built-in hopper 22, causes the plastic particles to be subjected to multiple effects of "reverse shearing, opening and closing kneading, and dispersion impact" in the conical hopper 4 and the pipe 5, which completely breaks the stratification of different raw materials and achieves uniform mixing of multiple raw materials.

[0045] As the mixing and dispersion continue, the mixed raw materials, under their own gravity and the pushing action of the mixing blades 19, enter the pipe 5 through the inlet at the bottom of the cone hopper 4, and are then precisely transported by the pipe 5 to the feed end of the mixer 2 inside the frame 1.

[0046] In the final mixing stage, the multi-component raw materials enter the mixer 2 for further molecular-level homogeneous mixing under the continuous stirring action of the mixer 2 (the mixer 2 uses the rotation of its internal stirring structure to perform final stirring and kneading of the granular raw materials, eliminating minor component unevenness). Finally, the completely homogeneous plastic raw material is discharged from the discharge end of the mixer 2, providing qualified raw materials for the subsequent granulation process.

[0047] In summary, the dynamic mixing and granulation equipment for plastic granules with controllable proportions of multiple raw materials ensures the uniformity of raw material granules through multi-dimensional mixing of "pre-dispersion + dynamic compound stirring", forming a continuous process to meet the requirements of multiple raw material proportions and providing qualified raw materials for subsequent granulation.

[0048] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

[0049] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A multi-material proportion controllable plastic particle dynamic mixing and granulating device, comprising a rack (1), a mixer (2) fixedly installed inside the rack (1) for stirring and mixing multi-component plastic materials to realize uniform fusion of the materials, characterized in that: The top of the rack (1) is fixedly provided with a mounting rack (3) for providing a stable bearing base and supporting subsequent component installation; The inner side of the mounting rack (3) is fixedly provided with a conical silo (4) for temporarily storing plastic raw materials to be mixed and ensuring smooth feeding, and the conical silo (4) is communicated with a pipeline (5) for accurately conveying the plastic raw materials to be mixed to the feeding end of the mixer (2) through the feeding opening formed in the bottom of the conical silo (4), ensuring the sealing and continuity of the raw material conveying. The inner wall of the mounting rack (3) is fixedly provided with a cabinet (6), and the inner side wall of the mounting rack (3) is fixedly provided with a cover (26) for dustproof protection of the conical silo (4), and the cover (26) is fixedly provided with a discharging pipe (10) for conveying different types / specifications of plastic raw materials through the clamping groove formed in the side wall thereof.

2. The multi-feed ratio-controllable plastic pellet dynamic mixing and granulating apparatus according to claim 1, wherein, A plurality of groups of supports fixedly arranged in the inner wall of the cabinet (6) are respectively rotationally connected with a driving worm (7) and a transmission worm (8), the inner wall of the cabinet (6) is rotationally connected with a pushing plate (9), both sides of the pushing plate (9) are movably connected with pull rods (11) through bearings, the bottom end of each pull rod (11) is fixedly connected with a driving ring (12), both sides of the transmission worm (8) are fixedly connected with eccentric wheels (13), and the eccentric wheels (13) are rotationally connected in the driving ring (12).

3. The multi-feed ratio-controllable plastic pellet dynamic mixing and granulating apparatus according to claim 2, characterized in that, One end of the pushing plate (9) is fixedly connected with a mounting sleeve (14) on the inner side, two balls (15) are movably connected in the mounting sleeve (14), and the top and bottom of each ball (15) are exposed on the outer side of the mounting sleeve (14).

4. The multi-feed ratio-controllable plastic pellet dynamic mixing and granulating apparatus according to claim 2, wherein The top end of the transmission worm (8) is fixedly connected with a transmission shaft (16) with a regular polygonal cross section, a limiting cylinder (17) matched with the transmission shaft (16) is slidably connected on the outer side of the transmission shaft (16), a linkage ring (18) is fixedly sleeved on the outer side of the limiting cylinder (17), and the balls (15) are located in the inner cavity of the linkage ring (18).

5. The multi-feed ratio-controllable plastic pellet dynamic mixing and granulating apparatus according to claim 4, wherein The top end of the limiting cylinder (17) penetrates the top of the cabinet (6), the bottom of the pipeline (5) in sequence, and extends into the inner cavity of the pipeline (5).

6. The multi-feed ratio-controllable plastic pellet dynamic mixing and granulating apparatus according to claim 5, wherein The top of the limiting cylinder (17) is rotationally connected with two rotating rods (27), the top end of each rotating rod (27) is rotationally connected with a stirring blade (19), the bottom center of the cover (26) is rotationally connected with a rotating disc (20), the bottom end of the rotating disc (20) is fixedly connected with a vertical rod (21), and the side wall of the stirring blade (19) is rotationally connected with the side wall of the vertical rod (21).

7. The multi-feed ratio-controllable plastic pellet dynamic mixing and granulating apparatus according to claim 5, wherein, The inner side of the conical silo (4) is rotationally connected with an inner silo (22), the inner side wall of the inner silo (22) is provided with a protrusion (23), the top of the inner silo (22) is fixedly connected with an annular toothed plate (24), the side wall of the cover (26) is fixedly provided with a first motor, the output end of the first motor is fixedly connected with a gear (25) engaged with the annular toothed plate (24), and the inner cavity of the cabinet (6) is fixedly provided with a second motor for driving the driving worm (7) to rotate.

8. The multi-feed ratio-controllable plastic pellet dynamic mixing and granulating apparatus according to claim 5, wherein, The bottom end of the pipeline (5) is communicated with the mixer (2), and the end of the discharging pipeline (10) far from the cover (26) is communicated with the external raw material supply mechanism.

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