A high dispersion twin screw extrusion device

Abstract

The application belongs to the technical field of extruders, and particularly relates to a high-dispersion double-screw extrusion device, which comprises a base, the upper surface of the base is fixed with a driving system, the upper surface of the base is provided with an extrusion cylinder, the driving system is used for driving the double screw rod in the extrusion cylinder to work, the upper surface of the right end of the extrusion cylinder is provided with a material conveying mechanism, a mixing hopper is communicated with the conveying pipe of the material conveying mechanism, a feeding dispersion mechanism is arranged in the mixing hopper, the feeding dispersion mechanism is used for conveying different raw materials into the mixing hopper respectively for diffusion and stirring, the carbon nanotube powder can be uniformly and rapidly diffused into multiple raw materials instead of being directly put into a certain raw material, the uniform dispersion effect of the powder in the multiple mixed raw materials is improved, and the overall performance of the plastic product after extrusion molding can be uniformly improved.

Description

Technical Field

[0001] This invention belongs to the field of extruder technology, and in particular relates to a highly dispersed twin-screw extrusion device. Background Technology

[0002] Twin-screw extruders were developed based on single-screw extruders. Due to their excellent feeding performance, mixing and plasticizing performance, venting performance, and extrusion stability, they are now widely used in the molding and processing of extruded products.

[0003] When a twin-screw extruder is needed to extrude plastic products, the raw material must first be added to the extrusion cylinder through the feeding hopper. In order to improve the various properties of plastic products, different raw materials are often added to the feeding hopper. For example, carbon nanotubes can be added to the feeding hopper to enhance the mechanical properties, electrical conductivity, corrosion resistance, and radio wave shielding properties of plastic products. However, carbon nanotube powder is lightweight and difficult to disperse.

[0004] Therefore, if carbon nanotube powder is directly added to the hopper and mixed with other raw materials without diffusion and stirring, the carbon nanotube powder is prone to agglomeration in the raw materials or cannot be fully dispersed in the raw materials. This can easily lead to the extruded plastic products being of substandard quality due to uneven performance. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0006] This invention relates to a highly dispersible twin-screw extrusion device, comprising a base, a drive system fixed on the upper surface of the base, and an extrusion cylinder disposed on the upper surface of the base. The drive system is used to drive the twin screws inside the extrusion cylinder to work. A material conveying mechanism is disposed on the upper surface of the right end of the extrusion cylinder. A mixing hopper is connected to the conveying pipe of the material conveying mechanism. A feeding and dispersing mechanism is disposed inside the mixing hopper. The feeding and dispersing mechanism is used to separately convey different raw materials into the mixing hopper for diffusion and mixing.

[0007] Further, the material conveying mechanism includes a supporting vertical plate, a guide cylinder, a conveying pipe, a rotating shaft, and a first spiral blade; the supporting vertical plate is fixedly supported above the drive system, and a drive motor is fixed on the left side of the supporting vertical plate; the guide cylinder is connected to the upper surface of the extrusion cylinder, and the guide cylinder is located on the right side of the supporting vertical plate; the conveying pipe is disposed between the supporting vertical plate and the guide cylinder, and the right end of the conveying pipe is connected to the guide cylinder; the lower port of the mixing hopper is connected to the conveying pipe through a vertical guide tube; the rotating shaft is inserted between the horizontally disposed conveying pipes, and the left end of the rotating shaft is connected to the output shaft of the drive motor, and its right end is inserted into the guide cylinder; the first spiral blade is sleeved on the rotating shaft, and the right end of the first spiral blade is flush with the left inner wall of the guide cylinder.

[0008] Further, the feeding and dispersing mechanism includes a support shaft tube, a driven gear, a driving gear, stirring rods, an umbrella-shaped distributing disc, a guide pipe, and a distributing pipe; the support shaft tube is rotatably inserted into the mixing hopper, and the upper end face of the support shaft tube is higher than the upper end cover of the mixing hopper; the driven gear is sleeved on the support shaft tube, and the driven gear is located above the upper end cover; the driven gear is meshed with the driving gear on its side, and the driving gear is connected to the output shaft of a drive motor fixed on the upper surface of the upper end cover; a plurality of stirring rods are arranged in a circumferential array on the support shaft tube, and the plurality of stirring rods are located inside the mixing hopper, and the length of the plurality of stirring rods is... The mixing hopper decreases in size from top to bottom; the umbrella-shaped distributing disc is mounted on the support shaft tube via a support conversion assembly, and is located above multiple stirring rods. A dispersion chamber is formed inside the umbrella-shaped distributing disc, and multiple dispersion holes communicating with the dispersion chamber are formed on the lower outer surface of the umbrella-shaped distributing disc; two guide pipes are connected and positioned on both sides of the mixing hopper, with their openings located below the umbrella-shaped distributing disc; the distributing pipes are rotatably inserted into the support shaft tube, and multiple guide grooves are formed on the circumferential array of the outer surface of the support shaft tube in contact with the umbrella-shaped distributing disc, and these guide grooves communicate with the dispersion chamber.

[0009] Furthermore, the feeding and dispersing mechanism also includes a second spiral blade, the bottom end face of the support shaft tube extends into the vertical guide tube, the second spiral blade is sleeved on the support shaft tube, and the second spiral blade is located inside the vertical guide tube.

[0010] Further, the support conversion assembly includes a support ring, a sliding collar, a rotating ring, an electric push rod, key blocks, and positioning pins; the support ring is fixedly sleeved on the support shaft tube, and the upper surface of the support ring contacts the lower surface of the umbrella-shaped distribution plate; the sliding collar is slidably sleeved on the support shaft tube, and the sliding collar is located above the umbrella-shaped distribution plate; the upper surface of the sliding collar has an annular groove, and a rotating ring is rotatably arranged in the annular groove; the fixed sections of at least two electric push rods are fixed on the upper end cover, and the lower end faces of the piston rods of the two electric push rods are connected to the upper surface of the rotating ring; the outer ring surface of the support shaft tube has at least two vertical keyways, and the vertical keyways are located above the umbrella-shaped distribution plate; the inner ring surface of the sliding collar has at least two key blocks, and each key block is slidably inserted into each vertical keyway; the upper surface of the umbrella-shaped distribution plate has a circumferential array of multiple insertion holes; the lower surface of the sliding collar has at least two positioning pins, and at least two positioning pins are slidably inserted into the insertion holes.

[0011] Furthermore, a dispersion tube is inserted into each of the dispersion holes, and a dispersion nozzle is connected to the lower end of each dispersion tube.

[0012] Furthermore, the dispersion tube is made of a flexible hose material.

[0013] Furthermore, the plurality of insertion holes in the circumferential array are symmetrically arranged in pairs around the center of the umbrella-shaped distribution plate, and at least two of the positioning pins are also symmetrically arranged.

[0014] The present invention has the following beneficial effects:

[0015] 1. This invention, by setting a feeding and dispersing mechanism in the mixing hopper, allows the rotation of the support tube shaft to drive multiple stirring rods to first mix at least two raw materials in the mixing hopper. Then, the powder is injected into the support shaft tube through the distributing pipe, and then into the dispersion chamber opened on the umbrella-shaped distributing plate through multiple guide grooves. Since the lower surface of the dispersion chamber has multiple dispersion holes arranged in a circumferential array, the powder entering the dispersion chamber will be sprayed out through the multiple dispersion holes and diffused downwards into the multiple raw materials being mixed. This allows the carbon nanotube powder to diffuse evenly and quickly into multiple raw materials, rather than being directly added to a single raw material, thereby improving the uniform dispersion effect of the powder in the multiple mixed raw materials. As a result, the overall performance of the plastic product after extrusion molding can be uniformly improved.

[0016] 2. This invention, by setting a support conversion component on the support shaft tube, allows the sliding collar to slide up and down on the outer ring surface of the support shaft tube, enabling the positioning pin to be inserted into the insertion hole opened on the upper surface of the umbrella-shaped material distribution plate. When the support shaft tube rotates, the umbrella-shaped material distribution plate will rotate due to the interaction of the key block and the vertical keyway. The centrifugal force generated by the umbrella-shaped material distribution plate will cause multiple dispersion tubes to expand and swing outward, which in turn will cause multiple dispersion nozzles to expand outward. Then, the multiple dispersion nozzles will spray the powder over a large area into the raw materials being mixed, thereby enabling the powder to be diffused over a large area into the raw materials being mixed, and further improving the uniform dispersion effect of the powder in the raw materials being mixed.

[0017] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying 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.

[0019] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this disclosure;

[0020] Figure 2 This is a schematic diagram of the material conveying mechanism according to an embodiment of the present disclosure;

[0021] Figure 3 This is a schematic diagram of the feeding and dispersing mechanism according to an embodiment of the present disclosure;

[0022] Figure 4 This is a cross-sectional view of the umbrella-shaped dispensing tray according to an embodiment of this disclosure;

[0023] Figure 5 This is a cross-sectional view of the delivery pipe according to an embodiment of this disclosure;

[0024] Figure 6 This is a cross-sectional view of a vertical conduit according to an embodiment of this disclosure;

[0025] In the diagram: 1. Base; 2. Drive system; 3. Extrusion cylinder; 4. Mixing hopper; 5. Vertical guide tube; 6. Material conveying mechanism; 61. Support plate; 62. Guide tube; 63. Conveying pipe; 64. Rotating shaft; 65. First spiral blade; 7. Feeding and dispersing mechanism; 71. Support shaft tube; 711. Guide trough; 712. Vertical keyway; 72. Driven gear; 73. Drive gear; 74. Stirring rod; 75. Umbrella-shaped distribution plate; 751. Dispersion chamber; 752. Dispersion hole; 753. Insertion hole; 76. Guide tube; 77. Distribution tube; 78. Second spiral blade; 8. Support conversion assembly; 81. Support ring; 82. Sliding collar; 821. Annular groove; 83. Rotating ring; 84. Electric push rod; 85. Key block; 86. Positioning insert; 9. Dispersion tube; 10. Dispersion nozzle. Detailed Implementation

[0026] 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.

[0027] Example 1:

[0028] like Figures 1-5 As shown, the present invention is a highly dispersed twin-screw extrusion device, including a base 1, a drive system 2 fixed on the upper surface of the base 1, and an extrusion cylinder 3 disposed on the upper surface of the base 1. The drive system 2 is used to drive the twin screws inside the extrusion cylinder 3 to work. A material conveying mechanism 6 is disposed on the upper surface of the right end of the extrusion cylinder 3. A mixing hopper 4 is connected to the conveying pipe 63 of the material conveying mechanism 6. A feeding and dispersing mechanism 7 is disposed inside the mixing hopper 4. The feeding and dispersing mechanism 7 is used to convey different raw materials into the mixing hopper 4 for diffusion and stirring.

[0029] In the design scheme of this invention, a feeding and dispersing mechanism 7 is set in the mixing hopper 4. When plastic products need to be extruded, the processing personnel add plastic raw materials to the mixing hopper 4 according to the type of raw materials to be added. Then, the carbon nanotube powder to be added is evenly diffused into the raw materials being injected into the mixing hopper 4 in an umbrella shape through the feeding and dispersing mechanism 7. Then, the feeding and dispersing mechanism 7 will rotate in the mixing hopper 4 to quickly stir and mix the injected raw materials and diffused powder, thereby improving the uniformity of carbon nanotube powder diffusion in the raw materials. Then, the mixed raw materials are conveyed to the extrusion cylinder 3 through the material conveying mechanism 6. The twin screw installed in the extrusion cylinder 3 is controlled by the drive system 2 to rotate and cooperate with the heating system installed on the extrusion cylinder 3, so that the mixed raw materials can be extruded through the extrusion head at the end of the extrusion cylinder 3 to make the required plastic products, thereby improving the uniformity and performance of the extruded plastic products.

[0030] In one embodiment of the present invention, the material conveying mechanism 6 includes a supporting vertical plate 61, a guide cylinder 62, a conveying pipe 63, a rotating shaft 64, and a first spiral blade 65; the supporting vertical plate 61 is fixedly supported above the drive system 2, and a drive motor is fixed to the left side of the supporting vertical plate 61; the guide cylinder 62 is connected to the upper surface of the extrusion cylinder 3, and the guide cylinder 62 is located on the right side of the supporting vertical plate 61; the conveying pipe 63 is disposed between the supporting vertical plate 61 and the guide cylinder 65. Between the square tubes 62, and the right end of the conveying pipe 63 is connected to the guide square tube 62, the lower port of the mixing hopper 4 is connected to the conveying pipe 63 through the vertical conduit 5; the rotating shaft 64 is inserted between the horizontally arranged conveying pipes 63, and the left end face of the rotating shaft 64 is connected to the output shaft of the drive motor, and its right end face is inserted into the guide square tube 62; the first spiral blade 65 is sleeved on the rotating shaft 64, and the right end face of the first spiral blade 65 is flush with the left inner wall of the guide square tube 62;

[0031] In the design scheme of this invention, after the raw materials and powder are diffused and mixed evenly in the mixing hopper 4, the mixing hopper 4 will guide the mixed raw materials into the conveying pipe 63 through the vertical guide tube 5. At this time, the drive motor on the side of the support plate 61 is controlled to work, so that it drives the first spiral blade 65 to rotate through the rotating shaft 64. The first spiral blade 65 is located in the conveying pipe 63. Therefore, the rotation of the first spiral blade 65 will transport the falling mixed raw materials into the guide tube 62, and then enter the extrusion cylinder 3 through the guide tube 62 for hot melt extrusion molding.

[0032] In one embodiment of the present invention, the feeding and dispersing mechanism 7 includes a support shaft tube 71, a driven gear 72, a driving gear 73, stirring rods 74, an umbrella-shaped distributing disc 75, a guide pipe 76, and a distributing pipe 77; the support shaft tube 71 is rotatably inserted into the mixing hopper 4, and the upper end face of the support shaft tube 71 is higher than the upper end cover of the mixing hopper 4; the driven gear 72 is sleeved on the support shaft tube 71, and the driven gear 72 is located above the upper end cover; the driven gear 72 is meshed with the driving gear 73 on its side, and the driving gear 73 is connected to the output shaft of a drive motor fixed on the upper surface of the upper end cover; a plurality of stirring rods 74 are arranged in a circumferential array on the support shaft tube 71, and the plurality of stirring rods 74 are located inside the mixing hopper 4, and the plurality of stirring rods 74... The length decreases from top to bottom within the mixing hopper 4; the umbrella-shaped distributing disc 75 is mounted on the support shaft tube 71 via the support conversion assembly 8, and the umbrella-shaped distributing disc 75 is located above multiple stirring rods 74. The umbrella-shaped distributing disc 75 has a dispersion cavity 751 inside, and multiple dispersion holes 752 communicating with the dispersion cavity 751 are opened on the lower surface of the outermost ring of the umbrella-shaped distributing disc 75; two guide pipes 76 are connected and arranged on both sides of the mixing hopper 4, and the openings of the two guide pipes 76 are located below the umbrella-shaped distributing disc 75; the distributing pipe 77 is rotatably inserted into the support shaft tube 71, and multiple guide grooves 711 are arranged in a circumferential array on the outer ring surface of the support shaft tube 71 that contacts the umbrella-shaped distributing disc 75, and the multiple guide grooves 711 are communicating with the dispersion cavity 751;

[0033] In the design of this invention, when different types of raw materials and powders need to be fed into the mixing hopper 4 for diffusion mixing, the operator connects the conveying pipe 63 of the raw material to be added to the guide pipe 76 connected to the outer ring surface of the mixing hopper 4, and then connects the conveying pipe 63 of the carbon nanotube powder to the distributing pipe 77. At this time, the drive motor fixed above the upper end cover of the mixing hopper 4 is controlled to work, so that it drives the support shaft pipe 71 to rotate through the active gear 73 and the meshing driven gear 72, which will drive multiple stirring rods 74 to rotate in the mixing hopper 4. At this time, at least two raw materials for preparing plastic products will first be injected into the mixing hopper 4 through the guide pipe 76. The at least two raw materials falling in will first be stirred and mixed by multiple stirring rods 74, and then the powder will be injected into the support shaft pipe 71 through the distributing pipe 77, and then injected into the dispersion cavity 751 opened on the umbrella-shaped distributing plate 75 through multiple guide grooves 711. Since the lower surface of the dispersion cavity 751 has multiple dispersions arranged in a circumferential array, Therefore, the powder entering the dispersion chamber 751 will be sprayed out through multiple dispersion holes 752 and diffused downwards into the various raw materials being stirred and mixed. This allows the carbon nanotube powder to diffuse evenly and quickly into the various raw materials, rather than being directly added to a certain raw material and then directly fed into the extrusion cylinder 3. This improves the uniform dispersion effect of the powder in the various mixed raw materials, so that the overall performance of the plastic product after extrusion molding can be uniformly improved, rather than the phenomenon that the performance of the plastic product is improved in some parts after extrusion molding, while the performance of other parts remains unchanged due to uneven diffusion of powder in the raw materials. When the various raw materials continue to be stirred and mixed with the diffused powder, the mixed raw materials will fall into the conveying pipe 63 through the vertical guide tube 5, and then be conveyed into the guide square cylinder 62 through the first spiral blade 65 in the conveying pipe 63. Then the mixed raw materials will fall into the extrusion cylinder 3 for hot melt extrusion molding.

[0034] In one embodiment of the present invention, the support conversion assembly 8 includes a support ring 81, a sliding collar 82, a rotating ring 83, an electric push rod 84, a key block 85, and a positioning pin 86. The support ring 81 is fixedly sleeved on the support shaft tube 71, and the upper surface of the support ring 81 contacts the lower surface of the umbrella-shaped material distribution plate 75. The sliding collar 82 is slidably sleeved on the support shaft tube 71, and the sliding collar 82 is located above the umbrella-shaped material distribution plate 75. An annular groove 821 is formed on the upper surface of the sliding collar 82, and a rotating ring 83 is rotatably disposed in the annular groove 821. At least two fixed sections of the electric push rods 84 are fixed on the upper surface. On the end cap, the lower end face of the piston rod of the two electric push rods 84 is connected to the upper surface of the rotating ring 83. The outer ring surface of the support shaft tube 71 is provided with at least two vertical keyways 712, and the vertical keyways 712 are located above the umbrella-shaped material distribution plate 75. The inner ring surface of the sliding collar 82 is provided with at least two key blocks 85, and each key block 85 is slidably inserted into each vertical keyway 712. The upper surface of the umbrella-shaped material distribution plate 75 is provided with a plurality of insertion holes 753 in a circumferential array. The lower surface of the sliding collar 82 is provided with at least two positioning pins 86, and at least two positioning pins 86 are slidably inserted into the insertion holes 753.

[0035] In the technical solution of this invention, in order to further improve the dispersion effect of powder in the raw materials being stirred and mixed, the umbrella-shaped distributing disk 75 is sleeved on the support shaft tube 71 through the support conversion component 8. When the umbrella-shaped distributing disk 75 needs to rotate, the piston rod of the electric push rod 84 fixed on the upper end cover is extended, which pushes the sliding collar 82 to slide downward along the support shaft tube 71. The sliding collar 82 will drive at least two positioning pins 86 to slide downward and insert into the corresponding two insertion holes 753. Then, when the support shaft tube 71 rotates, the umbrella-shaped distributing disk 75 will rotate through the cooperation of the key block 85 and the vertical keyway 712, so that the umbrella-shaped distributing disk 75 can centrifugally expand the powder sprayed from the multiple dispersion holes 752. The powder is dispersed into the raw materials being mixed, thereby further improving the uniform dispersion of the powder in the raw materials being mixed. When the rotation of the umbrella-shaped distribution plate 75 is not required, the piston rod of the electric push rod 84 retracts, causing it to drive the sliding collar 82 to slide upward along the support shaft tube 71. At this time, the key block 85 slides upward in the vertical keyway 712, and the two positioning pins 86 disengage from the corresponding insertion holes 753. The umbrella-shaped distribution plate 75 is supported by gravity through the support ring 81. When the support shaft tube 71 drives multiple stirring rods 74 to mix multiple raw materials, the umbrella-shaped distribution plate 75 is in a static state and sprays the powder evenly, thereby controlling the uniformity of the powder sprayed through the umbrella-shaped distribution plate 75.

[0036] In one embodiment of the present invention, a dispersion tube 9 is inserted into each dispersion hole 752, and a dispersion nozzle 10 is connected to the lower end of each dispersion tube 9. In the scheme designed in the present invention, when the powder is filled into the dispersion chamber 751, the dispersion chamber 751 will evenly distribute the powder into multiple dispersion tubes 9, and then spray it over a large area into the raw material being stirred and mixed through multiple dispersion nozzles 10. This allows the powder to be diffused over a large area into the raw material being stirred and mixed in a sprayed state, thereby further improving the uniformity of powder dispersion in the raw material, and thus further improving the overall quality of plastic product extrusion by the twin-screw extruder.

[0037] In one embodiment of the present invention, the dispersion tube 9 is made of an elastic flexible hose material. In the design of the present invention, in order to further increase the diffusion area of ​​the powder in the raw materials being stirred and mixed, the dispersion tube 9 is made of an elastic flexible hose material. When the umbrella-shaped distributing disk 75 is rotating, the centrifugal force generated by the umbrella-shaped distributing disk 75 will cause multiple dispersion tubes 9 to expand and swing outward. In turn, multiple dispersion disks will drive multiple dispersion nozzles 10 to expand outward, thereby further increasing the area of ​​the powder sprayed above the raw materials being stirred and mixed, and thus further improving the uniformity of the powder dispersion in the raw materials.

[0038] In one embodiment of the present invention, the plurality of insertion holes 753 in the circumferential array are symmetrically arranged in pairs around the center of the umbrella-shaped distribution disk 75, and at least two positioning pins 86 are also symmetrically arranged. In the design of the present invention, the insertion holes 753 are paired with each other. In order to facilitate the accurate insertion of the two downward sliding positioning pins 86 into the corresponding insertion holes 753 after the support shaft tube 71 stops rotating, so that when the support shaft tube 71 rotates again, it can drive the umbrella-shaped distribution disk 75 to rotate and perform large-area diffusion spraying of powder.

[0039] Example 2:

[0040] like Figure 6As shown, in another embodiment of the present invention, the feeding and dispersing mechanism 7 further includes a second spiral blade 78. The bottom end face of the support shaft tube 71 extends into the vertical guide tube 5, and the second spiral blade 78 is sleeved on the support shaft tube 71 and located inside the vertical guide tube 5. In the design scheme of the present invention, in order to facilitate the full and uniform mixing of various raw materials and powders in the mixing hopper 4, and at the same time to further improve the uniform mixing effect of various raw materials and powders, the present invention provides a second spiral blade 78 inside the vertical guide tube 5. When multiple stirring rods 74 are stirring the falling raw materials, the second spiral blade 78 will simultaneously... The first spiral blade 65 can be kept stationary while the second spiral blade 78 rotates to transport and mix the raw materials. Then, the first spiral blade 65 is rotated, and the second spiral blade 78 transports the mixed raw materials into the conveying pipe 63. The rotation of the first spiral blade 65 sends the mixed raw materials in the conveying pipe 63 into the guide tube 62. The rotating second spiral blade 78 can block the vertical guide pipe 5 to a certain extent, so that the various raw materials and powders can be fully and evenly mixed in the mixing hopper 4, thereby improving the overall performance of the extruded plastic products.

[0041] Working principle:

[0042] When different types of raw materials and powders need to be fed into the mixing hopper 4 for diffusion mixing, the operator connects the conveying pipe 63 of the raw material to be added to the guide pipe 76 connected to the outer ring of the mixing hopper 4, and then connects the conveying pipe 63 of the carbon nanotube powder to the distributing pipe 77. At this time, the drive motor fixed above the upper end cover of the mixing hopper 4 is controlled to work, so that it drives the support shaft tube 71 to rotate through the driving gear 73 and the meshing driven gear 72. This will drive multiple stirring rods 74 to rotate in the mixing hopper 4. At this time, at least two raw materials for preparing plastic products will be injected into the mixing hopper 4 through the guide pipe 76. The at least two raw materials falling into the mixing hopper 4 will first descend into the vertical guide tube 5. As multiple raw materials accumulate in the vertical guide tube 5, the rotation of multiple stirring rods 74 will first stir and mix the multiple raw materials accumulated in the mixing hopper 4, and then the powder will be injected into the support shaft tube 71 through the distributing pipe 77. The powder is injected into the dispersion chamber 751 on the umbrella-shaped distribution plate 75 through multiple guide grooves 711. Since the lower surface of the dispersion chamber 751 has multiple dispersion holes 752 arranged in a circumferential array, the powder entering the dispersion chamber 751 will be sprayed out through the multiple dispersion holes 752 and diffused downward into the various raw materials being stirred and mixed. When the various raw materials continue to be stirred and mixed with the diffused powder, the mixed raw materials will fall into the conveying pipe 63 through the vertical guide tube 5. At this time, a small portion of the raw materials that have been stirred and mixed will first be conveyed to the guide tube 62 through the first spiral blade 65 in the conveying pipe 63. Then the mixed raw materials will fall into the extrusion cylinder 3 for hot melt extrusion molding and be discharged as waste. Meanwhile, the conveying pipe 63 continuously conveys the mixed raw materials to the extrusion cylinder 3 through the guide tube 62 for hot melt extrusion molding, which facilitates the preparation of high-performance plastic products.

[0043] 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 the specific implementations described. 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 highly dispersible twin-screw extruder, comprising a base (1), characterized in that, The upper surface of the base (1) is fixed with a drive system (2), and the upper surface of the base (1) is provided with an extrusion cylinder (3). The drive system (2) is used to drive the double helical rod inside the extrusion cylinder (3) to work. The upper surface of the right end of the extrusion cylinder (3) is provided with a material conveying mechanism (6). The conveying pipe (63) of the material conveying mechanism (6) is connected to a mixing hopper (4). The mixing hopper (4) is provided with a feeding and dispersing mechanism (7). The feeding and dispersing mechanism (7) is used to convey different raw materials to the mixing hopper (4) for diffusion and stirring. The feeding and dispersing mechanism (7) includes a support shaft tube (71), a driven gear (72), a driving gear (73), a stirring rod (74), an umbrella-shaped distributing plate (75), a guide pipe (76), and a distributing pipe (77); the support shaft tube (71) is rotatably inserted into the mixing hopper (4), and the upper end face of the support shaft tube (71) is higher than the upper end cover of the mixing hopper (4); the driven gear (72) and the driving gear (73) are fitted onto the support shaft tube (71), and the driven gear (72) is located on the upper end cover. Above, the driven gear (72) is meshed with a driving gear (73) on its side, and the driving gear (73) is connected to the output shaft of a drive motor fixed on the upper surface of the upper end cover; stirring rods (74), a plurality of stirring rods (74) are arranged in a circumferential array on the support shaft tube (71), and the plurality of stirring rods (74) are located inside the mixing hopper (4), and the length of the plurality of stirring rods (74) decreases sequentially from top to bottom inside the mixing hopper (4); umbrella-shaped distributing plate (75), the umbrella-shaped distributing plate (75) is arranged on the support shaft tube (71) through a support conversion assembly (8), and An umbrella-shaped distribution plate (75) is located above multiple stirring rods (74). A dispersion chamber (751) is provided inside the umbrella-shaped distribution plate (75), and multiple dispersion holes (752) communicating with the dispersion chamber (751) are provided on the lower surface of the outermost ring of the umbrella-shaped distribution plate (75). Two guide pipes (76) are connected and arranged on both sides of the mixing hopper (4), with the openings of the two guide pipes (76) located below the umbrella-shaped distribution plate (75). A distribution pipe (77) is rotatably inserted into the support shaft pipe (71), and the support shaft pipe (77)... 71) The outer ring surface of the material distribution plate (75) in contact with the umbrella-shaped material distribution plate (75) is provided with a plurality of material guide grooves (711), and the plurality of material guide grooves (711) are connected to the dispersion chamber (751); a dispersion tube (9) is inserted into each dispersion hole (752), and a dispersion nozzle (10) is connected to the lower end of each dispersion tube (9); the dispersion tube (9) is made of elastic flexible hose material; the support conversion assembly (8) includes a support ring (81), a sliding collar (82), a rotating ring (83), an electric push rod (84), a key block (85), and a positioning pin (86);The support ring (81) is fixedly sleeved on the support shaft tube (71), and the upper surface of the support ring (81) is in contact with the lower surface of the umbrella-shaped material distribution plate (75). The sliding collar (82) is slidably sleeved on the support shaft tube (71), and the sliding collar (82) is located above the umbrella-shaped material distribution plate (75). The upper surface of the sliding collar (82) is provided with an annular groove (821), and a rotating ring (83) is rotatably arranged in the annular groove (821). The fixed sections of at least two electric push rods (84) are fixed on the upper end cover, and the lower end face of the piston rod of the two electric push rods (84) is connected to the upper surface of the rotating ring (83). On the surface, the outer ring of the support shaft tube (71) is provided with at least two vertical keyways (712), and the vertical keyways (712) are located above the umbrella-shaped material distribution plate (75). The inner ring of the sliding collar (82) is provided with at least two key blocks (85), and each key block (85) is slidably inserted into each vertical keyway (712). The upper surface of the umbrella-shaped material distribution plate (75) is provided with a plurality of insertion holes (753) arranged in a circumferential array. The lower surface of the sliding collar (82) is provided with at least two positioning pins (86), and at least two positioning pins (86) are slidably inserted into the insertion holes (753).

2. The highly dispersible twin-screw extruder according to claim 1, characterized in that, The material conveying mechanism (6) includes a support plate (61), a guide tube (62), a conveying pipe (63), a rotating shaft (64), and a first spiral blade (65). A support plate (61) is fixedly supported above the drive system (2), and a drive motor is fixed on the left side of the support plate (61). A guide tube (62) is connected to the upper surface of the extrusion cylinder (3) and is located on the right side of the support plate (61); The conveying pipe (63) is located between the supporting upright plate (61) and the guide tube (62), and the right end of the conveying pipe (63) is connected to the guide tube (62). The lower end of the mixing hopper (4) is connected to the conveying pipe (63) through the vertical guide tube (5). A rotating shaft (64) is inserted between horizontally arranged conveying pipes (63), and the left end face of the rotating shaft (64) is connected to the output shaft of the drive motor, and its right end face is inserted into the guide tube (62); The first spiral blade (65) is sleeved on the rotating shaft (64), and the right end face of the first spiral blade (65) is flush with the left inner wall of the guide tube (62).

3. The highly dispersible twin-screw extruder according to claim 1, characterized in that, The feeding and dispersing mechanism (7) also includes a second spiral blade (78). The bottom end face of the support shaft tube (71) extends into the vertical guide tube (5). The second spiral blade (78) is sleeved on the support shaft tube (71) and is located inside the vertical guide tube (5).

4. The highly dispersible twin-screw extruder according to claim 1, characterized in that, The plurality of said insertion holes (753) in the circumferential array are symmetrically arranged in pairs around the center of the umbrella-shaped distribution plate (75), and at least two said positioning pins (86) are also symmetrically arranged.

Images