Barrier type mixing screw assembly for high speed extruders

Abstract

The application discloses a barrier type mixing screw assembly for a high-speed plastic extruding machine, relates to the technical field of the screw of the plastic extruding machine for recycling waste plastics, and aims to solve the problems of poor adaptability of the existing screw plastic recycling waste and uneven mixing of the regenerated material, comprising: a plastic extruding machine body, including a feeding part, a plastic extruding part connected with the feeding part, and a sending part arranged at the end of the plastic extruding part; a screw assembly, including a first screw segment arranged in the plastic extruding part, a second screw segment connected with the first screw segment, and a barrier component arranged at the connecting position of the first screw segment and the second screw segment; and a control assembly arranged on the barrier component; the plastic extruding machine body, the screw assembly and the control assembly are cooperated to realize efficient conveying and barrier interception of the plastic raw material, the adjustable gap design is matched with different types and different qualities of plastic recycling waste, and the problems of uneven traditional screw mixing and poor barrier interception are solved.

Description

Technical Field

[0001] This invention relates to the technical field of extruder screws for recycling waste plastics, and particularly to a barrier-type mixing screw assembly for high-speed extruders. Background Technology

[0002] High-speed extruder mixing screws are core components in the plastics processing industry, widely used in plastic waste recycling, waste plastic granulation, and recycled material modification. Their mixing uniformity and barrier interception capabilities directly determine the molding quality and production efficiency of recycled plastic products. Currently, barrier-type mixing screws on the market generally have several shortcomings: traditional barrier structures have fixed interception protrusions and gaps, making it difficult to adapt to plastic waste of different particle sizes and cleanliness levels. This easily leads to incompletely melted waste particles and impurities passing directly through, severely affecting the purity of recycled materials and product strength; during the mixing process, the raw material return path is singular, resulting in insufficient residence time and uneven dispersion of recycled materials, easily leading to problems such as localized performance differences, poor plasticization, and uneven color.

[0003] Meanwhile, most segmented screws have complex connection structures, making disassembly and maintenance inconvenient and hindering the rapid replacement of functional sections based on waste type and recycled material ratio. Furthermore, some screws exhibit poor synergy between the barrier and mixing structure, leading to recycled material accumulation, pressure fluctuations, and incomplete plasticization during high-speed operation, further reducing mixing stability and recycled material quality. In addition, existing screws lack precise gap adjustment mechanisms, failing to dynamically adjust barrier interception strength and mixing effect according to waste viscosity, impurity content, and recycling process requirements. This insufficient adaptability and flexibility restricts the efficient resource utilization of plastic waste and the improvement of recycled plastic product quality.

[0004] Therefore, there is an urgent need to develop a barrier-type mixing screw assembly for high-speed extruders that can completely block and mix materials evenly, has adjustable gaps, and is easy to disassemble and assemble. This will solve the technical problems of unstable mixing quality of recycled materials, poor adaptability to waste materials, and low maintenance efficiency in existing equipment, and meet the industry demand for recycling and regenerating plastic waste and making it more efficient in resource utilization. Summary of the Invention

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0006] In view of the problems existing in the current barrier-type mixing screw assembly for high-speed extruders, the present invention is proposed.

[0007] Therefore, the purpose of this invention is to provide a barrier-type mixing screw assembly for a high-speed extruder.

[0008] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a barrier-type mixing screw assembly for a high-speed extruder, comprising: an extruder body, including a feeding section, an extrusion section connected to the feeding section, and a delivery section disposed at the end of the extrusion section; a screw assembly, including a first screw section disposed within the extrusion section, a second screw section connected to the first screw section, and a barrier component disposed at the connection between the first screw section and the second screw section; and a control component disposed on the barrier component.

[0009] As a preferred embodiment of the barrier-type mixing screw assembly for high-speed extruders according to the present invention, the extrusion section includes a plurality of extruder sleeves connected to the feeding section and a connecting plate disposed on the extruder sleeves, the screw assembly is disposed inside the extruder sleeves, and a connecting component is disposed between the first screw section and the second screw section.

[0010] As a preferred embodiment of the barrier-type mixing screw assembly for high-speed extruders described in this invention, the connecting component includes an intermediate shaft disposed between a first screw section and a second screw section, a bolt rod disposed on the first screw section and the second screw section, and a threaded hole on the connecting plate that mates with the bolt rod. The first screw section is provided with a first thread, and the second screw section is provided with a second thread. The barrier component is disposed on the connecting plate.

[0011] As a preferred embodiment of the barrier-type mixing screw assembly for a high-speed extruder according to the present invention, the barrier component includes a plurality of barrier rings disposed on a connecting plate, a plurality of intercepting protrusions disposed on the barrier rings, and a recessed groove disposed between every two adjacent barrier rings. A tightening ring corresponding to the barrier ring is disposed inside the extruder sleeve. A tightening groove is provided on the tightening ring, and an intercepting gap is formed between the tightening groove and the barrier ring. A plurality of tightening plates are disposed on the tightening ring, and the control component is disposed on the tightening ring.

[0012] As a preferred embodiment of the barrier-type mixing screw assembly for high-speed extruders described in this invention, the tightening plate includes a main plate and a concave plate connected to the main plate. The shape of the concave plate matches the shape of the tightening groove. Each main plate is connected to the upper end of the concave plate. Each concave plate is provided with a retaining ring. The retaining ring is provided with a plurality of abutment rings corresponding to the recessed groove. A gap is formed between the abutment ring and the recessed groove. A plurality of return grooves are opened on the abutment ring.

[0013] The control component includes a slider slidably connected to a tightening ring, a crossbar set on the slider, a pull block slidably connected to the tightening ring, an inclined groove set at the lower end of the pull block, and a mating strip set on the tightening ring that cooperates with the inclined groove. There are two pull blocks, and the two ends of the crossbar are slidably connected to the two pull blocks respectively. The pull blocks are connected to the main board.

[0014] As a preferred embodiment of the barrier-type mixing screw assembly for high-speed extruders described in this invention, the reflux groove includes a straight groove disposed on the abutment ring, an extended arc-shaped groove communicating with the straight groove, and an open groove communicating with the extended arc-shaped groove. The inner diameter of the open groove gradually increases from the end near the extended arc-shaped groove to the end away from the extended arc-shaped groove.

[0015] In a preferred embodiment of the barrier-type mixing screw assembly for a high-speed extruder described in this invention, a plurality of arc-shaped retaining rods are provided between each two retaining rings, the arc-shaped retaining rods including a first stop rod and a second stop rod, the two ends of the first stop rod being respectively hinged to the ends of two second stop rods, the middle section of each first stop rod being hinged to the middle section of the corresponding second stop rod, and the inclination angle of the first stop rod being opposite to the inclination angle of the second stop rod.

[0016] In a preferred embodiment of the barrier-type mixing screw assembly for a high-speed extruder described in this invention, a storage groove is provided on the side wall of the first and second stop rods, a plurality of winding cylinders are provided in the storage groove, a plurality of flexible screening plates are provided in the storage groove, the flexible screening plates are respectively disposed on the winding cylinders in the storage groove, a pull rod is provided on the side of the first and second stop rods away from the storage groove, and a matching clamping plate connected to the pull rod is provided on each of the flexible screening plates.

[0017] As a preferred embodiment of the barrier-type mixing screw assembly for high-speed extruders described in this invention, each of the retaining rings has a retaining groove on its side wall, a connecting shaft connected to the outer retaining rod and the second stop rod is provided in the retaining groove, and a sliding groove that cooperates with the connecting shaft is provided in the retaining groove.

[0018] As a preferred embodiment of the barrier-type mixing screw assembly for high-speed extruders described in this invention, the flexible screen plate is provided with a plurality of filter holes.

[0019] The beneficial effects of this invention are as follows: This invention achieves plastic waste recycling, efficient barrier interception, and uniform mixing of recycled materials through the coordinated operation of the extruder body, screw assembly, and control components. It solves the problems of uneven mixing of recycled materials, poor waste interception, and non-adjustable gaps in traditional screw extruders. It is suitable for the processing needs of virgin plastics and various waste plastics and recycled materials, and promotes the resource utilization of plastic waste.

[0020] The extruder body, screw assembly, and control components work together to achieve efficient conveying, barrier interception, thorough mixing, and precise control of plastic raw materials. This solution addresses the problems of uneven mixing and poor barrier interception in traditional screw extruders, while also ensuring ease of installation and structural stability. It significantly improves the mixing quality and production efficiency of high-speed extruders and is suitable for high-speed extrusion processing of various plastic raw materials such as PE, PP, and ABS. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0022] Figure 1 This is a schematic diagram of the overall structure of the barrier-type mixing screw assembly for high-speed extruders of the present invention.

[0023] Figure 2 This is a cross-sectional schematic diagram of the internal structure of the barrier-type mixing screw assembly for the high-speed extruder of the present invention.

[0024] Figure 3 This is a schematic diagram of the screw of the barrier-type mixing screw assembly for high-speed extruders of the present invention.

[0025] Figure 4 This is a schematic diagram of the screw barrier component of the barrier-type mixing screw assembly for high-speed extruders of the present invention.

[0026] Figure 5 for Figure 2 Enlarged diagram of part A in the middle.

[0027] Figure 6 This is a schematic diagram of the upper structure of the tightening ring of the barrier-type mixing screw assembly for high-speed extruders of the present invention.

[0028] Figure 7 This is a front view schematic diagram of the tightening ring of the barrier-type mixing screw assembly for high-speed extruders of the present invention.

[0029] Figure 8 This is a schematic diagram of the first and second stop bars between the retaining rings of the barrier-type mixing screw assembly for the high-speed extruder of the present invention.

[0030] Figure 9 for Figure 7 Enlarged schematic diagram of part B in the middle.

[0031] Figure 10 This is a schematic diagram of the first and second stop rods of the barrier-type mixing screw assembly for the high-speed extruder of the present invention.

[0032] Explanation of reference numerals in the attached drawings: 100, Feeding section; 101, Extrusion section; 102, Feeding section; 200, Screw assembly; 201, First screw section; 202, Second screw section; 203, Barrier component; 1011, Extruder sleeve; 1012, Connecting plate; 103, Intermediate shaft; 1031, Bolt rod; 2031, Barrier ring; 2032, Recessed groove; 2033, Tightening ring; 204, Tightening plate; 2041, Main plate; 2042. 205. Concave plate; 206. Snap ring; 207. Abutment ring; 300. Spacer plate; 301. Control component; 302. Slider; 303. Crossbar; 304. Pull block; 305. Inclined groove; 306. Mating strip; 307. Straight groove; 308. Extended arc groove; 400. Open groove; 401. First stop bar; 402. Second stop bar; 404. Storage groove; 406. Flexible filter plate; 407. First drive block; 408. First lever. Detailed Implementation

[0033] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0034] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0035] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0036] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0037] Example 1

[0038] Reference Figures 1-10This first embodiment of the invention provides a barrier-type mixing screw assembly for a high-speed extruder, including an extruder body, a screw assembly 200, and a control assembly 300. The three components work together to achieve efficient conveying of plastic raw materials, barrier interception, thorough mixing, and precise control. This specifically addresses the problems of uneven mixing and poor barrier interception in traditional screw extruders, while also considering ease of installation and structural stability. It significantly improves the mixing quality and production efficiency of high-speed extruders and is suitable for the high-speed extrusion processing needs of various plastic raw materials such as PE, PP, and ABS.

[0039] Furthermore, the extruder body serves as the basic support and raw material conveying unit of the device, providing a mounting foundation for the screw assembly 200 and a raw material conveying channel. The extruder body is a single-screw extruder, which is placed entirely on the ground. In this embodiment, the extruder body includes a feeding section 100, an extrusion section 101 connected to the feeding section 100, and a delivery section 102 at the end of the extrusion section 101.

[0040] The feeding section 100 includes a feeding bin and a feeding port set on the feeding bin. When the operator is performing extrusion, the operator pours plastic granules into the feeding bin. The feeding bin is funnel-shaped and its lower end is connected to the extrusion section 101.

[0041] Preferably, the extrusion section 101 includes a plurality of extruder sleeves 1011 connected to the feeding section 100 and a connecting plate 1012 disposed on the extruder sleeves 1011, and the screw assembly 200 is disposed inside the extruder sleeves 1011.

[0042] Preferably, the delivery section 102 includes a delivery pipe that communicates with the end of the extrusion section 101. A delivery tube is provided at the end of the delivery pipe. The diameter of the delivery tube is much smaller than the diameter of the delivery pipe, and a plurality of extrusion holes are provided on the delivery tube.

[0043] The multi-segment extruder sleeve 1011 is designed for easy disassembly and maintenance, making inspection and repair more convenient compared to an integral structure. The extruder sleeve 1011 and the connecting plate 1012 are fastened together with high-strength bolts and sealing gaskets to ensure internal sealing and prevent leakage of high-temperature melt. The extruder sleeve 1011 provides independent installation space for the barrier component 203 and the control component 300, without affecting the raw material conveying channel, while protecting the core components from external interference and extending their service life.

[0044] Furthermore, the present invention also includes a screw assembly 200, which is a core mixing unit to realize raw material conveying, barrier interception, and thorough mixing. In this embodiment, the screw assembly 200 includes a first screw section 201 disposed in the extrusion section 101 and a second screw section 202 connected to the first screw section 201. The first screw section 201 is provided with a first thread, and the second screw section 202 is provided with a second thread. The spacing between the first threads on the first screw section 201 is the largest, and the spacing between the second threads on the second screw section 202 is smaller than the spacing between the first threads on the first screw section 201. At the same time, the thread extension directions of the first screw section 201 and the second screw section 202 are consistent. A connecting component is provided at the connection between the first screw section 201 and the second screw section 202. The connecting component is used to connect and separate the first screw section 201 and the second screw section 202. A barrier component 203 is also provided at the connection between the first screw section 201 and the second screw section 202.

[0045] Preferably, in this embodiment, the connecting component includes an intermediate shaft 103 disposed between the first screw section 201 and the second screw section 202, a bolt rod 1031 disposed on the first screw section 201 and the second screw section 202, and a threaded hole on the intermediate shaft 103 that mates with the bolt rod 1031. The intermediate shaft 103 is generally disc-shaped, and a mating recess is provided on the intermediate shaft 103 to mate with the first screw section 201 and the second screw section 202. A washer is also provided on the bolt rod 1031 to increase the friction after installation.

[0046] The segmented screw design allows for the replacement of different functional sections (such as conveying section and mixing section) according to processing requirements. The connecting parts are connected by bolt rod 1031 and threaded hole to achieve quick assembly and disassembly of screw sections. Compared with the welded structure, the maintenance and replacement efficiency is higher. Furthermore, the differentiated design of the pitch and lead of the first and second threads can adjust the raw material conveying speed and improve the mixing uniformity in conjunction with the subsequent mixing structure.

[0047] Furthermore, in this embodiment, the barrier component 203 includes a plurality of barrier rings 2031 disposed on the intermediate shaft 103, a plurality of intercepting protrusions disposed on the barrier rings 2031, and a recessed groove 2032 disposed between every two adjacent barrier rings 2031. The barrier rings 2031 are cylindrical in shape and are fixedly connected to the intermediate shaft 103. At the same time, the diameter of the barrier rings 2031 is larger than the diameter of the first screw segment 201 and the second screw segment 202, and the plurality of intercepting protrusions are parallel to each other, and the width of the recessed groove 2032 is consistent with the width of the intercepting protrusions.

[0048] Furthermore, a tightening ring 2033 corresponding to the barrier ring 2031 is provided inside the extruder sleeve 1011. A tightening groove is provided on the tightening ring 2033. The tightening groove is rectangular in shape and forms an interception gap between the tightening groove and the barrier ring 2031. Several tightening plates 204 are provided on the tightening ring 2033. A control component 300 is also provided on the tightening ring 2033.

[0049] Preferably, the barrier ring 2031 cooperates with the interception protrusion to intercept incompletely melted raw material particles, preventing them from directly entering subsequent processes. The recessed groove 2032 forms a raw material return channel, prolonging the raw material residence time and increasing the uniformity of mixing. The interception gap between the tightening groove and the barrier ring 2031 can be adjusted by the control component 300 to adapt to raw materials of different viscosities.

[0050] Furthermore, in this embodiment, the control component 300 includes a slider 301 slidably connected to the tightening ring 2033, a crossbar 302 disposed on the slider 301, a pull block 303 slidably connected to the tightening ring 2033, an inclined groove 304 disposed at the lower end of the pull block 303, and a mating strip 305 disposed on the tightening ring 2033 that cooperates with the inclined groove 304. Two sliders 301 and two pull blocks 303 are provided, arranged opposite each other on the tightening ring 2033, with their positions close to the opening of the tightening groove. The crossbar 302 extends from the slider 301. The slider 301 is slidably connected to two pull blocks 303, which are connected to the main board 2041. The two pull blocks 303 are symmetrically arranged on both sides of the slider 301. The mating bar 305 is also inclinedly arranged on the tightening ring 2033. A cylinder is provided at the rear end of the slider 301. The cylinder drives the slider 301 to move. When the slider 301 moves, the crossbar 302 pulls the two pull blocks 303 to move at the same time. Under the guidance of the mating bar 305, the pull blocks 303 will gradually move towards each other, thereby driving the two main boards 2041 to move towards the center of the tightening groove.

[0051] Furthermore, a displacement sensor is added to the slider 301 of the control component 300 and connected to the extruder control system to realize automated closed-loop control of gap adjustment. This enables precise adjustment of the gap between the tightening ring 2033 and the barrier ring 2031. The symmetrical design of the two pull blocks 303 ensures that the tightening plate 204 is subjected to uniform force, avoiding gap inconsistency caused by unilateral offset, and further improving the uniformity of mixing.

[0052] Furthermore, in this embodiment, the tightening plate 204 includes a main plate 2041 and a concave plate 2042 connected to the main plate 2041. The shape of the concave plate 2042 matches the shape of the tightening groove. The main plate 2041 is fixed on the end sidewall of the concave plate 2042. Each main plate 2041 is connected to the upper end of the concave plate 2042. A retaining ring 205 is provided on each concave plate 2042. A plurality of abutment rings 206 corresponding to the recessed groove 2032 are provided on the retaining ring 205. A gap is formed between the abutment ring 206 and the recessed groove 2032.

[0053] Preferably, the concave plate 2042 is mainly made of two interconnected plates with an included angle of 90° between the two plates. The two plates are inclined and the distance between the end of the concave plate 2042 closer to the main plate 2041 and the barrier ring 2031 is greater than the distance between the end of the concave plate 2042 away from the main plate 2041 and the barrier ring 2031, thereby forming a gradually shrinking filter space.

[0054] Furthermore, a reflux groove is provided on the abutment ring 206. The reflux groove includes a straight groove 306 provided on the abutment ring 206, an extended arc-shaped groove 307 communicating with the straight groove 306, and an open groove 308 communicating with the extended arc-shaped groove 307. The inner diameter of the open groove 308 gradually increases from the end near the extended arc-shaped groove 307 to the end away from the extended arc-shaped groove 307. As a result, a number of filtered unmelted plastic particles will enter the reflux groove and gradually move from the reflux groove to the open groove 308. Then, they will be discharged from the open groove 308 to a location near the first screw section 201 for reheating and melting.

[0055] The design of the straight groove 306, the extended arc groove 307 and the open groove 308 guides the raw materials to flow back and mix multiple times, resulting in better mixing effect compared to the single straight groove 306; the enlarged inner diameter design of the open groove 308 reduces the flow resistance of the raw materials and avoids pressure accumulation.

[0056] Preferably, a spacer 207 is slidably connected between the concave plates 2042, and a groove for the spacer 207 to slide is provided on the side wall of the concave plate 2042.

[0057] Preferably, a plurality of arc-shaped retaining rods, hinged end-to-end, are provided between every two retaining rings 205. Each arc-shaped retaining rod includes a first stop 400 and a second stop 401. The number of first stop 400s is the same as the number of second stop 401s. The first stop 400s are inclined, and the second stop 401s are also inclined, with the inclination angles of the first stop 400s opposite to those of the second stop 401s. Each first stop 400 has its two ends hinged to the ends of two second stop 401s respectively. Each second stop 401 consists of two second stop 401s at intervals, meaning each first stop 400 spans three second stop 401s. One end of each first stop 400 is hinged to one of the two second stop 401s located at both ends, and the other end is hinged to the other of the two second stop 401s located at both ends. Then, the middle section of each first stop 400 is hinged to the middle section of the corresponding second stop 401. In this way, several first stop 400s and second stop 401s are connected according to the above rules.

[0058] Furthermore, a storage groove 402 is provided on the side wall of the first stop 400 and the second stop 401. Multiple winding cylinders are provided in the storage groove 402, with a certain interval between the multiple winding cylinders. Several flexible screening plates 404 are provided in the storage groove 402. The flexible screening plates 404 are made of flexible material, and one end of the plate is connected to the adjacent first stop 400 or second stop 401. Several flexible screening plates 404 are respectively provided on several winding cylinders in the storage groove 402.

[0059] Preferably, each winding cylinder is provided with a hinged bracket at both ends, the hinged bracket is fixed in the storage groove 402, and both ends of the winding cylinder are rotatably connected to the hinged bracket, thereby allowing the winding cylinder to rotate.

[0060] Preferably, a first drive block 406 is slidably connected to the side wall of each retaining ring 205, and a first lever 407 is rotatably connected to the first drive block 406. Two adjacent first levers 407 are hinged to each other, and the two first levers 407 are respectively hinged to the ends of two adjacent second stops 401.

[0061] Among them, the cross-hinged structure of the arc-shaped clamp rod can extend and retract with the movement of the control component 300, adjust the spacing of the clamp ring 205, and thus change the size of the gap between the abutment ring 206 and the recessed groove 2032, so as to realize the dynamic adjustment of the mixing strength; the filter holes of the flexible screen plate 404 can filter impurities in the raw materials, and further divide the raw materials to improve the dispersion effect.

[0062] Operation process: Select the appropriate first screw section 201 and second screw section 202 according to the characteristics of the raw materials being processed, and fix the segmented screws through the connecting plate 1012 and bolt rod 1031 of the connecting component; check the installation status of the barrier component 203 and the control component 300 to ensure that each component moves smoothly; adjust the control component 300 and set the initial barrier gap and mixing strength parameters.

[0063] The operator starts the extruder, and the plastic raw material enters the extrusion section 101 from the feed section 100. The first thread of the first screw section 201 conveys the raw material forward. When it passes through the second thread of the second screw section 202, the raw material is compacted and initially melted under the push of the thread. When the molten raw material flows through the barrier component 203, the intercepting protrusions on the barrier ring 2031 intercept the incompletely melted raw material particles, forcing the raw material into the gap between the recessed groove 2032 and the abutment ring 206. The return groove guides the raw material to return multiple times, and at the same time, the control component 300 makes the concave plate 2042 move continuously, thereby adjusting the distance between the abutment ring 206 and the recessed groove 2032.

[0064] When the concave plates 2042 move from an approaching state to a moving away state, the distance between adjacent concave plates 2042 increases, thereby pulling the first drive block 406. This causes the angle between the two first levers 407 to increase, resulting in the first stop levers 400 and second stop levers 401 changing from a moving away state to a moving closer state. When the first stop levers 400 and second stop levers 401 move closer to each other, the first stop levers 400 and second stop levers 401 and the flexible filter plate 404 fill the gaps between the concave plates 2042, thereby filtering and intercepting smaller plastic particles. Furthermore, the first stop levers... The first stop 400 and the second stop 401 move synchronously with the movement of the concave plate 2042. When the concave plates 2042 move from a state of being far apart to a state of being close together, the distance between the concave plates 2042 will decrease. At this time, the first stop 400 and the second stop 401 will change from a state of being close together to a state of being far apart. Since the first stop 400 and the second stop 401 themselves have a certain curvature, they will unfold along a spherical surface when unfolding, thereby squeezing the plastic raw material and bringing the plastic raw material closer to the screw assembly 200, so that the plastic raw material is fully mixed and the unmelted material residue rate is reduced.

[0065] Based on the melt pressure and temperature feedback during the processing, the position of the slider 301 is adjusted by the control component 300, which drives the pull block 303 and the tightening plate 204 to move, dynamically adjusting the barrier gap and mixing intensity to ensure stable mixing quality; the fully mixed raw material is conveyed to the delivery section 102 and fed into the subsequent extrusion mold to complete the extrusion process.

[0066] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. Any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended protection.

[0067] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the invention as currently considered, or those features that are not relevant to implementing the invention) may be omitted.

[0068] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0069] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the protection scope of the present invention.

Claims

1. A barrier-type mixing screw assembly for a high-speed extruder, characterized in that: include: The extruder body includes a feeding section (100), an extrusion section (101) connected to the feeding section (100), and a delivery section (102) provided at the end of the extrusion section (101). The screw assembly (200) includes a first screw section (201) disposed in the extrusion section (101), a second screw section (202) connected to the first screw section (201), and a barrier member (203) disposed at the connection between the first screw section (201) and the second screw section (202). A control component (300) is disposed on the barrier component (203).

2. The barrier-type mixing screw assembly for high-speed extruders as described in claim 1, characterized in that: The extrusion section (101) includes a plurality of extruder sleeves (1011) connected to the feeding section (100) and a connecting plate (1012) disposed on the extruder sleeves (1011). The screw assembly (200) is disposed inside the extruder sleeves (1011), and a connecting component is disposed between the first screw section (201) and the second screw section (202).

3. The barrier-type compounding screw assembly for a high-speed extruder as described in claim 2, characterized in that: The connecting component includes an intermediate shaft (103) disposed between the first screw section (201) and the second screw section (202), a bolt rod (1031) disposed on the first screw section (201) and the second screw section (202), and a threaded hole on the intermediate shaft (103) that mates with the bolt rod (1031). The first screw section (201) is provided with a first thread, and the second screw section (202) is provided with a second thread. The barrier component (203) is disposed on the intermediate shaft (103).

4. The barrier-type compounding screw assembly for high-speed extruders as described in claim 3, characterized in that: The barrier component (203) includes a plurality of barrier rings (2031) disposed on the intermediate shaft (103), a plurality of intercepting protrusions disposed on the barrier rings (2031), and a recessed groove (2032) disposed between every two adjacent barrier rings (2031). The extruder sleeve (1011) is provided with a tightening ring (2033) corresponding to the barrier rings (2031). The tightening ring (2033) is provided with a tightening groove. The tightening ring (2033) is provided with a plurality of tightening plates (204). The control component (300) is disposed on the tightening ring (2033).

5. The barrier-type compounding screw assembly for a high-speed extruder as described in claim 4, characterized in that: The tightening plate (204) includes a main plate (2041) and a concave plate (2042) connected to the main plate (2041). The shape of the concave plate (2042) matches the shape of the tightening groove. Each main plate (2041) is connected to the upper end of the concave plate (2042). Each concave plate (2042) is provided with a retaining ring (205). The retaining ring (205) is provided with a plurality of abutment rings (206) corresponding to the recessed groove (2032). A gap is formed between the abutment ring (206) and the recessed groove (2032). A plurality of return grooves are opened on the abutment ring (206). A spacer plate (207) is slidably connected between the concave plates (2042). The control component (300) includes a slider (301) slidably connected to a tightening ring (2033), a crossbar (302) disposed on the slider (301), a pull block (303) slidably connected to the tightening ring (2033), an inclined groove (304) disposed at the lower end of the pull block (303), and a mating strip (305) disposed on the tightening ring (2033) and cooperating with the inclined groove (304). There are two pull blocks (303), and the two ends of the crossbar (302) are slidably connected to the two pull blocks (303) respectively. The pull blocks (303) are connected to the main board (2041).

6. The barrier-type compounding screw assembly for a high-speed extruder as described in claim 5, characterized in that: The return channel includes a straight channel (306) disposed on the abutment ring (206), an extended arcuate channel (307) communicating with the straight channel (306), and an open channel (308) communicating with the extended arcuate channel (307). The inner diameter of the open channel (308) gradually increases from the end near the extended arcuate channel (307) to the end away from the extended arcuate channel (307).

7. The barrier-type compounding screw assembly for a high-speed extruder as described in claim 6, characterized in that: Between each pair of retaining rings (205), there are a number of arc-shaped retaining rods that are hinged end to end. The arc-shaped retaining rods include a first stop (400) and a second stop (401). The two ends of the first stop (400) are respectively hinged to the ends of the two second stop (401). The middle section of each first stop (400) is hinged to the middle section of the corresponding second stop (401). The inclination angle of the first stop (400) is opposite to the inclination angle of the second stop (401).

8. The barrier-type compounding screw assembly for a high-speed extruder as described in claim 7, characterized in that: Storage grooves (402) are provided on the side walls of the first stop (400) and the second stop (401). Several winding cylinders are provided in the storage grooves (402). Several flexible screening plates (404) are provided in the storage grooves (402). Several flexible screening plates (404) are respectively arranged on the winding cylinders in the storage grooves (402).

9. The barrier-type compounding screw assembly for a high-speed extruder as described in claim 5, characterized in that: Each of the retaining rings (205) has a first drive block (406) slidably connected to its side wall, and a first lever (407) is rotatably connected to the first drive block (406). Two adjacent first levers (407) are hinged to each other, and the two first levers (407) are respectively hinged to the ends of two adjacent second stops (401).

10. The barrier-type compounding screw assembly for a high-speed extruder as described in claim 8, characterized in that: The flexible filter plate (404) has several filter holes.

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