CN205112337U - Twin screw extruder - Google Patents

Abstract

The utility model relates to a twin screw extruder, include frame (1), set up casing (2), barrel (3) and PPC controller (8) in frame (1), the upper portion of casing (2) is equipped with feed arrangement, and this feed arrangement includes hopper (4) and helical feeding device (5), being equipped with screw rod (6) of two parallels in barrel (3), all installing the spiral component of a plurality of different specifications on every screw rod (6), the other end of barrel (3) is equipped with discharge gate (10), be provided with the drive arrangement who is used for driving two screw rod (6) rotatings incorgruous relatively on frame (1), this twin screw extruder adopts the rotatory extruded mode of twin -screw, and the friction heat that the raw materials was extruded the in -process production is few, institute's screw rod that receives meshing shear effect in the barrel is stable even for the raw materials, the raw materials is mixed and the plastics mass ratio is better.

Description

twin screw extruder

technical field

The utility model belongs to the technical field of powder processing equipment, in particular to a twin-screw extruder.

Background technique

Carbon fiber material is a new product developed in recent years. It is composed of ultrafine powder material and polyacrylonitrile carbon fiber, and its strength can be as high as 250-560MPa, while ordinary powder materials are usually only 12MPa. This powder material also has light weight, heat resistance, and good flame retardancy. advantages, suitable for various

Civil engineering is an excellent structural material, and it can also be used in aerospace engineering. The technical process of carbon fiber materials is: crushing and pre-homogenization; raw material preparation, grinding; raw material homogenization, screening and grading; preheating decomposition, drying; powder material clinker firing; powder material grinding; powder material packaging .

At present, the raw materials used in the production of carbon fiber materials are not very stable under the screw meshing and shearing action in the barrel, and the raw material mixing and plastic quality are relatively low. And after processing, the residual material in the machine barrel needs to be cleaned manually, which cannot meet the needs of users and affects the normal operation of the mill.

For above-mentioned technical problem, so need to improve.

Utility model content

The technical problem to be solved by the utility model is to solve the deficiencies of the prior art, and propose a kind of material in the machine barrel that is subjected to a stable and even shearing action of the screw rod, the raw material mixing and plastic quality are relatively good, and the processing time is short, and the extrusion molding A twin-screw extruder with high product output.

In order to solve the above-mentioned technical problems, the utility model is achieved in that a twin-screw extruder includes a frame, a casing arranged on the frame, a machine barrel, and a PPC controller; the upper part of the casing is provided with a feeding device , the feeding device includes a hopper and a screw feeding device; two parallel screws are arranged in the barrel, and a plurality of screw parts of different specifications are installed on each screw, and the other end of the barrel is provided with a discharge port The frame is provided with a driving device for driving the two screws to rotate in opposite directions relative to each other. One end of the screw is connected to the driving device, and the other end of the screw is movably arranged at the discharge port, where the two screws are close to each other. A diverter plate is provided at the end of the screw; the two screw rods have the same direction of rotation and interlock with each other; the driving device includes a screw bearing, a motor, and a gear reduction box connected to the motor through a conveyor belt. The reduction box drives the screw to rotate through the rotation of the screw bearing, and the gear reduction box is fixed on the frame and connected by nuts.

Preferably, the screw includes a splined shaft with splines, a threaded element and a kneading element; the inner holes of the threaded element and the kneading element have spline grooves corresponding to the splines on the splined shaft; , reverse threaded elements and multiple different forward and reverse kneading elements are arranged on the spline shaft in sequence, and the two ends of the spline shaft will fix the arranged threaded elements and kneading elements, and one end of the screw rod is provided with The screw head matched with the notch of the spline groove is fixedly connected with the other end of the screw through a screw bearing; the outer diameter of the screw head is smaller than the outer diameter of the screw.

As a preference, each screw can be divided into: a conveying section, a melting section, a mixing section, an exhaust section and a homogenizing section, wherein the housing corresponding to the conveying section is provided with a hopper, and the corresponding barrel inside the conveying section The helices installed on the two screws are all positive helixes, and the two screws have a phase difference of 90° when assembling.

As a preference, Z/Y, XZ/Y, GDZ/Y indicate that the threaded element is a forward thread, Z/YL indicates that the threaded element is a reverse thread, where Z indicates the lead of the threaded element, its unit is mm, and Y indicates The unit of length of the threaded element is mm, X in XZ/Y means the lead of 1/Y of Z; and GD in GDZ/Y means that the groove depth of the screw groove of the threaded element transitions from deep to shallow.

As a preference, Z/Y, XZ/Y and Z/YL have various specific data among the multiple different forward and reverse thread elements represented by Z/Y, XZ/Y and Z/YL For: 28/14, 68/34, X68/34, GD34/34, 44/22, L22/22, 34/34, as a preference, @/n/m means positive kneading element, @/n/mCZ Indicates that the notch of the kneading element is on a straight line with the screw as a whole, and @/n/mCF indicates that the notch of the kneading element is oblique to the direction of the screw; @ indicates the misalignment angle of the kneading element, n indicates the number of kneading blocks, m Indicates the length of the entire kneading element; its specific data is: 44/5-45°, 44/4-60°, 28/4-60°, 40-45°/5-54, 40-90°/5-32 , 28/5-45°30/5-45°, 40-44-44-CZ, 40-45°/5-32, 40-44/44-CF; among them, the kneading element is 40-45°/5 -54, @/n/m/Q indicates that there are Q pieces of forward and reverse kneading elements with the same specification.

Preferably, the screw can also be divided into 11 heating zones, namely the first heating zone, the second heating zone, the third heating zone, the fourth heating zone, the fifth heating zone, the sixth heating zone, and the seventh heating zone , the eighth heating zone, the ninth heating zone, the tenth heating zone, and the eleventh heating zone;

The first heating zone includes the following elements: 28/14, 68/34, 68/34;

The second heating zone includes the following elements: 28/14, X68/34, X68/34;

The third heating zone includes the following elements: X68/34, GD34/34, 68/34

The fourth heating zone includes the following elements: 68/34, 44/5-45°, 44/4-60°, 28/4-60°;

The fifth heating zone includes the following elements: 44/22, 40-45°/5-54, 40-90°/5-32, 28/5-45°, L22/22;

The sixth heating zone includes the following elements: 44/22, 44/22, 28/14, 30/5-45°, 28/5-45°;

The seventh heating zone includes the following elements: 40-44-44-CZ, 30/5-45°, 40-45°/5-32, 40-90°/5-32; 40-44/44-CF;

The eighth heating zone includes the following elements: 44/22, 44/22, 28/14, 44/5-45°,

The ninth heating zone includes the following elements: 44/4-60°, 40-45°/5-54, L22/22, 68/34

The tenth heating zone includes the following elements: 68/34, 34/34, 44/22

The eleventh heating zone includes the following elements: 44/22, 44/22, 28/14, 28/14.

Preferably, the screw has a length of 1897.5mm and a diameter of 30mm.

As preferably, one end of the PPC controller is connected to the host through a switch; the other end is connected to the delivery module, the drive module, the temperature module and the power supply module; the delivery module, the drive module, the temperature module and the power supply module are connected to the PPC controller Operation panel for control.

Preferably, a temperature sensor is installed outside the barrel corresponding to the screw, and the temperature sensor is connected to the PPC controller.

The beneficial effects of the utility model are: the twin-screw extruder adopts the twin-screw rotary extrusion method, and the frictional heat generated during the extruding process of the raw material is less; the meshing and shearing effect of the screw rods on the raw material in the barrel is stable and even; The quality of raw material mixing and plastic is relatively good; the residence time of raw materials in the barrel is short, and the output of extruded products is high; the quality of raw materials extruded and plasticized on the twin-screw extruder and mixed and plasticized is relatively stable; the twin-screw meshing rotation work , The residual material in the barrel can be cleaned automatically.

Description of drawings

Fig. 1 is a structural schematic diagram of an embodiment of a twin-screw extruder of the present invention.

Fig. 2 is a schematic structural view of the threaded element of the present invention.

Fig. 3 is a structural schematic diagram of the kneading element of the present invention.

Fig. 4 is a structural schematic diagram of the kneading element of the present invention.

Fig. 5 is a structural schematic diagram of the utility model PPC controller.

Reference signs in the figure: frame 1, shell 2, machine barrel 3, hopper 4, screw feeding device 5, screw rod 6, spline shaft 6-1, thread element 6-2, kneading element 6-3, spline groove 6-4, screw head 6-5, screw bearing 7, PPC controller 8, conveying module 8-1, drive module 8-2, temperature module 8-3, power module 8-4, host 8-5, operation panel 8-6, switch 8-7, splitter plate 9, discharge port 10, motor 11, conveyor belt 12, gear reduction box 13, temperature sensor 14.

detailed description

Below in conjunction with accompanying drawing, the utility model embodiment is described in detail.

Embodiment one: as shown in Figure 1: twin-screw extruder, comprises frame 1, the housing 2 that is arranged on the frame 1, machine barrel 3 and PPC controller 8; The feeding device includes a hopper 4 and a screw feeding device 5; two parallel screws 6 are arranged in the barrel 3, and a plurality of screws 6 of different specifications are installed on each screw 6, and the barrel 3 The other end of the screw rod 6 is provided with a discharge port 10; the frame 1 is provided with a driving device for driving two screw rods 6 to rotate in opposite directions relative to each other, one end of the screw rod 6 is connected with the driving device, and the other end of the screw rod 6 is movably arranged at the outlet At the material port 10, a diverter plate 9 is provided at the position close to the ends of the two screw rods 6 at the side of the discharge port 10; the direction of rotation of the corresponding screw rods 6 on the two screw rods 6 is the same, and they are engaged with each other; the driving device includes Screw bearing 7, motor 11 and the gear reduction box 13 that is connected with described motor 11 by conveyor belt 12, and this gear reduction box 13 drives screw rod 6 to rotate by the rotation of screw bearing 7, and described gear reduction box 13 is fixed on the machine Frame 1 and connected by nuts.

When in use, the rotation of the screw bearing 7 drives the screw 6 to rotate, so that the gear reduction box 13 drives two symmetrical screws 6 to quickly self-propagate and lift the material upwards, forming two symmetrical stud-shaped material flows along the barrel 3 from bottom to top, so that the screw The outer material enters the envelope of the stud to varying degrees, a part of the material is dislocated and lifted, and the other part of the material is thrown out of the stud, so as to achieve the continuous renewal and diffusion of the material in the entire circumference, and the two lifted materials converge to the center. A downward flow of material is formed to form a convective cycle. Due to the combination of the above movements, the materials are uniformly mixed in a short time, and the mixing precision is high.

As shown in Figure 2: the screw rod 6 includes a splined shaft 6-1 with splines, a threaded element 6-2 and a kneading element 6-3; the inner holes of the threaded element 6-2 and the kneading element 6-3 have The spline groove 6-4 corresponding to the spline on the spline shaft 6-1; a plurality of different forward and reverse thread elements 6-2 and a plurality of different forward and reverse kneading elements 6-3 are arranged in sequence On the spline shaft 6-1, the two ends of the spline shaft 6-1 fix the arranged threaded element 6-2 and the kneading element 6-3, and one end of the screw rod 6 is provided with a spline groove 6-4 notch The matched screw head 6-5 is fixedly connected to the other end of the screw 6 through a screw bearing 7; the outer diameter of the screw head 6-5 is smaller than the outer diameter of the screw 6.

Each screw 6 can be divided into: conveying section A, melting section B, mixing section C, exhaust section D and homogenizing section P, wherein the housing 2 corresponding to conveying section A is provided with a hopper 4, and the conveying section The screws installed on the two screw rods 6 inside the barrel 3 corresponding to A are all forward spirals, and the two screw rods 6 have a phase difference of 90° during assembly.

Conveying section A is generally for conveying materials and preventing overflow.

Melting section B, this section fully melts and homogenizes the material through heat transfer and frictional shearing.

The mixing section C further refines and uniforms the size of the material components to form an ideal structure, with distribution and dispersion mixing functions.

Exhaust section D, to discharge impurities such as water vapor and low molecular weight substances.

Homogenization section P, conveying and pressurizing, establishes a certain pressure, so that the material at the die mouth has a certain density, and at the same time, it is further mixed, and finally achieves the purpose of smooth extrusion and granulation.

Z/Y, XZ/Y, GDZ/Y indicate that the threaded element 6-2 is a forward thread, Z/YL indicates that the threaded element 6-2 is a reverse thread, where Z represents the lead of the threaded element 6-2, which The unit is mm, Y represents the length of the threaded element 6-2 in mm, X in XZ/Y represents the lead of 1/Y of Z; and GD in GDZ/Y represents the groove of the threaded element 6-2 The depth of the groove is excessive from deep to shallow.

Z/Y, XZ/Y and Z/YL have various specific data in Z/Y, XZ/Y and Z/YL in the multiple different forward and reverse screw elements 6-2 represented by Z/Y, XZ/Y and Z/YL: 28 /14, 68/34, X68/34, GD34/34, 44/22, L22/22, 34/34,

Use @/n/m to indicate the forward kneading element 6-3, @/n/mCZ indicates that the gap of the kneading element 6-3 is in a straight line with the screw as a whole, and @/n/mCF indicates that the kneading element 6-3 The notch and the direction of the screw are oblique; @ indicates the dislocation angle of the kneading element 6-3, n indicates the number of kneading blocks, and m indicates the length of the entire kneading element 6-3; the specific data is: 44/5-45° , 44/4-60°, 28/4-60°, 40-45°/5-54, 40-90°/5-32, 28/5-45°30/5-45°, 40-44- 44-CZ, 40-45°/5-32, 40-44/44-CF; among them, the kneading element 6-3 is 40-45°/5-54, @/n/m/Q means positive , There are Q pieces of reverse kneading elements.

The screw rod 6 has a length of 1897.5mm and a diameter of 30mm.

As shown in Figure 3: one end of the PPC controller 8 is connected to the host 8-5 through the switch 8-7; the other end is connected to the delivery module 8-1, the drive module 8-2, the temperature module 8-3 and the power supply module 8-4 connection; the delivery module 8-1, drive module 8-2, temperature module 8-3 and power module 8-4 are connected with an operation panel 8-6 controlling the PPC controller 8; A temperature sensor 14 is provided, and the temperature sensor 14 is connected with the PPC controller 8; and the temperature is displayed online on the operation panel 8-6, and the temperature can be controlled, which is convenient and practical.

The working principle of the utility model: in the operation process, the use of the threaded element 6-2 is divided into forward and reverse threads, the forward thread is mainly used for the transportation of materials, and the reverse thread is mainly used for pressurization and material transportation. Back-mixing effect, the geometric parameters of the threaded element 6-2 mainly include the lead and the depth of the screw groove, which can be divided into large, medium and small leads; the depth of the screw groove can be divided into deep, medium and shallow;

Large lead means that the pitch is 1.5D~2D3, and small lead means that the pitch is about 0.4D.

The law of its use: with the increase of the lead, the extrusion volume of the screw increases, the residence time of the material decreases, and the mixing effect decreases.

The occasions where large-lead threads are selected, and the occasions where the main purpose is transportation, are beneficial to increase production; heat-sensitive polymers can shorten the residence time and reduce degradation; the selection of exhaust (also shallow grooves) can increase the surface area, which is conducive to exhaust and volatilization Wait.

In the case of medium-lead thread, in the case of mixing, it has a combination of different working sections that gradually shrink for conveying and pressurization.

In the case of using a small lead thread, it is generally gradually reduced in combination, and it is used in the conveying section and the homogenizing metering section to increase the pressure and improve the melting; improve the degree of mixing and extrusion stability.

The kneading element 6-3 is a key element of the twin-screw extruder, and its main function is to provide strong shear force. The material is highly dispersed through the shearing action of the kneading element 6-3. When the material passes through the kneading zone , the interface is different from the shearing direction, and the interface is constantly updated due to the shearing effect, so that the material is refined and uniform.

Direction, divided into forward and reverse. On the contrary, it has the effect of hindering the transportation of materials, prolonging the time, increasing the filling and increasing the pressure, and greatly improving the mixing effect.

Angle, generally divided into "30°, 45°, 60°, 90°", its function and effect:

When it is positive, increasing the staggered angle will reduce the conveying capacity, prolong the residence time, and improve the mixing effect, but the leakage will be easier. For distributive mixing and dispersive mixing, distributive mixing is more effective as the angle is larger, and dispersive mixing is the best when the angle is 45°, followed by 30°, and the worst is 60°.

In the reverse direction, increasing the angle will reduce the effective confinement of the polymer, but the leakage will be easier.

The width of screw flight generally has 7mm, 11mm, 11.2mm, 14mm, 19mm, etc. This is one of the most important parameters to measure the shear size and mixing size. The larger the width, the larger the shear and the smaller the mixing; The smaller the cut, the bigger the mix. For distributive mixing and dispersive mixing, the effectiveness of distributive mixing decreases as the width increases, and the effectiveness of dispersive mixing increases as the width increases; the smaller the width, the ratio of the axial effective flow rate to the radial effective flow rate of the material increases. increase.

The number of heads is generally divided into single head, double head and triple head. Its effect:

In the positive direction, the fewer the number of heads, the greater the extrusion delivery capacity, the greater the torque, and the better the mixing characteristics, but the less shearing.

In the reverse direction, the fewer the number of heads, the smaller the extrusion delivery capacity and the better the mixing characteristics. The two-start thread can be mainly used for extrusion, it is evenly heated and short, and has good self-cleaning performance (commonly used). The three-start thread can flexibly choose the pressure and temperature distribution of the material at the corner of the machine, the fiber addition is stable, and the exhaust surface renewal effect is good, but the output is low.

The segmentation and function of the screw 6: in the E section of the first heating zone, it mainly plays the role of conveying materials and preventing overflow; it includes the following components: 28/14, 68/34, 68/34; in this section, due to Due to the difference in the shape of materials and polymer raw materials, a large material storage space is required to adapt to the adjustment of the feeding amount, so as to prevent the accumulation of materials at the feeding port and produce overflow. Since the utility model adopts 11-stage heating mode, the lead of the thread in this area is determined by From small to large, the forward thread with medium groove and large lead is sufficient.

In section F of the second heating zone, it mainly serves as a balance transition for conveying materials; including the following components: 28/14, X68/34, X68/34; basically similar to section E of the first heating zone, the difference is due to If the balance is excessive, the required lead will decrease correspondingly, and the volume of the screw groove in this area changes from large to small, or use a medium screw groove and large lead forward thread.

In section G of the third heating zone, it is mainly to achieve a balance transition of the conveying material and at the same time prepare for the full melting of the material; including the following components: X68/34, GD34/34, 68/34; continue the second heating Section F of zone, for the next stage of melting preparation, gradually transitions from small lead to large lead, using deep groove forward thread to compact loose powdery material or increase the filling degree of granular material in screw 6, To promote the melting of the material in the next area.

In section H of the fourth heating zone, through heat transfer and frictional shearing, it starts to fully melt and homogenize the material, including the following elements: 68/34, 44/5-45°, 44/4-60°, 28 /4-60°; From the conveying area to the preparation for melting after being pressurized, mixing begins to occur, which provides a guarantee for the heat source of the material. In this section, set the screw element 6-2 and the kneading element 6-3 at different angles.

In section I of the fifth heating zone, the material is fully melted and homogenized through heat transfer and frictional shearing, including the following elements: 44/22, 40-45°/5-54, 40-90°/5-32 , 28/5-45°, L22/22; in this section, the material begins to melt after being subjected to a certain compression ratio in the conveying area, and mixes, so there are two sources of heat for the material to melt, one is provided by the barrel heating External heating, the other is generated by the external shear force of the screw 6, and the reverse kneading element 6-3 is set in this section to prepare for the next section.

In section J of the sixth heating zone, it is prepared for kneading materials to make the materials gradually thinner, including the following components: 44/22, 44/22, 28/14, 30/5-45°, 28/5-45°; The material is in a molten state after being melted, and the mixing between the components of the blend system starts from melting, and the size of the polymer in the dispersed phase changes.

In section K of the seventh heating zone, the material is mixed to further refine and uniform the size of the material to form an ideal structure, including the following components: 40-44-44-CZ, 30/5-45°, 40-45°/ 5-32, 40-90°/5-32; 40-44/44-CF; the melted material is in a molten state, from the primary millimeter-scale macroscopic particles to the micron-scale at the end of melting, the role of this area is to The components are further refined and homogenized, therefore, the combination of elements in this area is dominated by kneading elements 6-3.

In section L of the eighth heating zone, this area is the initial part of the material exhaust area, including the following components: 44/22, 44/22, 28/14, 44/5-45°, the material flow characteristics of the exhaust area are The material in the completely molten state is suddenly decompressed after being compressed, and the volatile material is quickly volatilized under vacuum conditions and separated from the melt.

In section M of the ninth heating zone, the following components are included: 44/4-60°, 40-45°/5-54, L22/22, 68/34, and the reverse thread element 6-2 is set at the beginning position of the exhaust zone Or the reverse kneading element 6-3 seals the melt and builds up high pressure; the exhaust area adopts a large lead screw element 6-3 to form a low fullness and thin melt area, so that the material can be exposed freely surface to facilitate gas emission.

In the N segment of the tenth heating zone, the following components are included: 68/34, 34/34, 44/22, and in the O segment of the eleventh heating zone, the following components are included: 44/22, 44/22, 28/14, 28/ 14. These two sections are mainly used for melt conveying and pressurization, to establish a certain pressure, so that the material at the die mouth has a certain density, and at the same time further mixed, and finally achieve the purpose of smooth extrusion and granulation. The screw 6 structure in this area The type should realize pressurization through thread element 6-2 lead gradual change or screw groove gradual change.

The above description of the disclosed embodiments enables those skilled in the art to realize or use the utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Although this paper uses more reference numerals in the figure: frame 1, housing 2, barrel 3, hopper 4, screw feeding device 5, screw 6, spline shaft 6-1, threaded element 6-2 , Kneading element 6-3, spline groove 6-4, screw head 6-5, screw bearing 7, PPC controller 8, delivery module 8-1, drive module 8-2, temperature module 8-3, power module 8- 4. Host 8-5, operation panel 8-6, switch 8-7, diverter plate 9, discharge port 10, motor 11, conveyor belt 12, gear reducer 13, temperature sensor 14 and other terms, but does not exclude the use of other terms term possibility. These terms are only used to describe and explain the essence of the utility model more conveniently; interpreting them as any kind of additional limitation is against the spirit of the utility model.

Claims (10)

1. A twin-screw extruder, characterized in that it includes a frame (1), a casing (2) arranged on the frame (1), a barrel (3), and a PPC controller (8); the casing The upper part of (2) is provided with a feeding device, which includes a hopper (4) and a screw feeding device (5); the barrel (3) is provided with two parallel screws (6), each screw (6) are equipped with a number of screw parts of different specifications, and the other end of the barrel (3) is provided with a discharge port (10); the frame (1) is provided with a drive for driving two screws (6) relative to each other. Rotating driving device, one end of the screw (6) is connected with the driving device, the other end of the screw (6) is movably set at the outlet (10), and the side of the outlet (10) is close to two screws (6) A splitter plate (9) is provided at the end; the two screw rods (6) have the same direction of rotation of the corresponding screw rods (6) and are interlocked with each other; the driving device includes a screw bearing (7), a motor ( 11) and the gear reduction box (13) connected with the motor (11) through the conveyor belt (12), the gear reduction box (13) drives the screw (6) to rotate through the rotation of the screw bearing (7), and the gear reduces The box (13) is fixed on the frame (1) and connected by nuts. 2. The twin-screw extruder according to claim 1, characterized in that the screw (6) comprises a splined shaft (6-1) with splines, a threaded element (6-2) and a kneading element (6-3); the inner hole of the threaded element (6-2) and the kneading element (6-3) has a spline groove (6-4) corresponding to the spline on the spline shaft (6-1); A plurality of different forward and reverse thread elements (6-2) and a plurality of different forward and reverse kneading elements (6-3) are arranged on the spline shaft (6-1) in sequence, and the spline shaft (6-1) -1) The two ends of the threaded element (6-2) and the kneading element (6-3) are fixed, and one end of the screw (6) is provided with a spline groove (6-4) matching The screw head (6-5) is fixedly connected to the other end of the screw rod (6) through a screw bearing (7); the outer diameter of the screw head (6-5) is smaller than the outer diameter of the screw rod (6). 3. The twin-screw extruder according to claim 2, characterized in that: each screw (6) can be divided into: conveying section (A), melting section (B), mixing section (C), exhaust section (D) and homogenization section (P), wherein the housing (2) corresponding to the conveying section (A) is provided with a hopper (4), and the two inside the barrel (3) corresponding to the conveying section (A) The spirals installed on the root screw (6) are all forward spirals, and when assembled, the phase difference of the two screw rods (6) is 90°. 4. The twin-screw extruder according to claim 2, characterized in that: Z/Y, XZ/Y, GDZ/Y indicate that the threaded element (6-2) is a forward thread, and Z/YL indicates the threaded element (6-2) is a reverse thread, where Z represents the lead of the threaded element (6-2) in mm, Y represents the length of the threaded element (6-2) in mm, X in XZ/Y Indicates the 1/Y lead of Z; and GD in GDZ/Y indicates that the groove depth of the screw groove of the threaded element (6-2) transitions from deep to shallow. 5. The twin-screw extruder according to claim 4, characterized in that: said multiple different forward and reverse screw elements represented by Z/Y, XZ/Y and Z/YL (6- 2) Z/Y, XZ/Y and Z/YL have various specific data: 28/14, 68/34, X68/34, GD34/34, 44/22, L22/22, 34/34 . 6. The twin-screw extruder according to claim 2, characterized in that: @/n/m represents the forward kneading element (6-3), @/n/mCZ represents the kneading element (6-3) The notch and the screw are in a straight line as a whole, And @/n/mCF indicates that the notch of the kneading element (6-3) is oblique to the direction of the screw; @ indicates the dislocation angle of the kneading element (6-3), n indicates the number of kneading blocks, and m indicates the entire kneading element (6-3) length; the specific data are: 44/5-45°, 44/4-60°, 28/4-60°, 40-45°/5-54, 40-90°/5- 32, 28/5-45°30/5-45°, 40-44-44-CZ, 40-45°/5-32, 40-44/44-CF; among them, the kneading element (6-3) is 40-45°/5-54, @/n/m/Q indicates that there are Q pieces of forward and reverse kneading elements with the same specifications. 7. The twin-screw extruder according to claim 3, characterized in that: the screw (6) can also be divided into 11 heating zones, namely the first heating zone (E), the second heating zone (F) , the third heating zone (G), the fourth heating zone (H), the fifth heating zone (I), the sixth heating zone (J), the seventh heating zone (K), the eighth heating zone (L), the The ninth heating zone (M), the tenth heating zone (N), and the eleventh heating zone (O); among them The first heating zone (E) includes the following elements: 28/14, 68/34, 68/34; The second heating zone (F) includes the following elements: 28/14, X68/34, X68/34; The third heating zone (G) includes the following elements: X68/34, GD34/34, 68/34 The fourth heating zone (H) includes the following elements: 68/34, 44/5-45°, 44/4-60°, 28/4-60°; The fifth heating zone (I) includes the following elements: 44/22, 40-45°/5-54, 40-90°/5-32, 28/5-45°, L22/22; The sixth heating zone (J) includes the following elements: 44/22, 44/22, 28/14, 30/5-45°, 28/5-45°; The seventh heating zone (K) includes the following elements: 40-44-44-CZ, 30/5-45°, 40-45°/5-32, 40-90°/5-32; 40-44/44- CF; The eighth heating zone (L) includes the following elements: 44/22, 44/22, 28/14, 44/5-45°, The ninth heating zone (M) includes the following elements: 44/4-60°, 40-45°/5-54, L22/22, 68/34 The tenth heating zone (N) includes the following elements: 68/34, 34/34, 44/22 The eleventh heating zone (O) includes the following elements: 44/22, 44/22, 28/14, 28/14. 8. The twin-screw extruder according to claim 7, characterized in that: the length of the screw (6) is 1897.5 mm, and the diameter is 30 mm. 9. The twin-screw extruder according to claim 1, characterized in that: one end of the PPC controller (8) is connected to the host (8-5) through a switch (8-7); the other end is connected to the delivery module ( 8-1), drive module (8-2), temperature module (8-3) and power supply module (8-4); the delivery module (8-1), drive module (8-2), temperature module ( 8-3) and the power module (8-4) are connected with an operation panel (8-6) for controlling the PPC controller (8). 10. The twin-screw extruder according to claim 1, characterized in that: the barrel (3) corresponding to the screw (6) is provided with a temperature sensor (14), and the temperature sensor (14) is connected with the PPC controller (8) CONNECTIONS.