Triangular rotor plasticizing transportation method and device based on extrusion normal stress

Abstract

The invention discloses a triangular rotor plasticizing transportation method and device based on extrusion normal stress, and belongs to the technical field of high polymer material processing. According to the method, a triangular rotor with a Reuleaux triangle cross section is arranged in a kidney-shaped hole machine barrel, and three independent containing cavities are formed through continuous meshing of three vertexes of the rotor and the inner wall of the machine barrel; the rotor is driven to perform planetary motion of autorotation and revolution in the same direction, and the radial and axial volumes of all the containing cavities are subjected to periodic pulsation change by means of a matched spiral structure of the rotor and the machine barrel in the axial direction; in the process, the materials mainly bear the action of cyclic axial and radial normal stress, are sequentially compacted, fused, mixed and plasticized, and are forcibly conveyed by virtue of the axial normal stress. The corresponding device comprises the triangular rotor, a machine barrel and a driving assembly. The normal stress leading mode is used for replacing a traditional shearing leading mode, the plasticizing efficiency and the mixing effect are effectively improved, energy consumption is reduced, stable forced conveying with low dependence on material characteristics is achieved, and the runner is free of dead corners and easy to clean.

Description

Technical Field

[0001] This invention belongs to the field of polymer material plasticizing and transporting technology, and particularly relates to a method and apparatus for plasticizing and transporting triangular rotors based on extrusion normal stress. Background Technology

[0002] In the field of polymer material processing and molding, solid polymer raw materials (such as granules and powders) are typically transformed into a uniform melt with good flowability through melting, plasticizing, and mixing, and then transported to a mold or die to form the final product. This process of melting, plasticizing, and forward conveying materials is collectively referred to as plasticizing and conveying, and it is the core front-end link of almost all polymer molding technologies, such as extrusion and injection molding.

[0003] Currently, the plasticizing and conveying technology widely used in industry is represented by single-screw or twin-screw extruders, whose core component is the screw. During operation, the screw rotates inside the barrel, mainly relying on the friction between the screw surface and the material (solid conveying section) and the shear stress generated by the viscosity of the melt (melting section and melt conveying section) to drag the material forward and achieve heat transfer and mixing. This working principle based on shear flow field has been used for decades.

[0004] However, with the advancement of polymer materials science and the continuous improvement of product performance requirements, this traditional shear-dominated plasticizing transport mode has gradually revealed the following inherent defects and bottlenecks: The heat generated by shear deformation is mainly concentrated in the shear layer inside the material. The efficiency of heat conduction from the inside to the outside is low, resulting in a slow mass and heat transfer process. In order to achieve complete melting, the material often needs to undergo a long thermomechanical process, which not only increases energy consumption but also prolongs the residence time of the material at high temperatures, potentially causing thermal degradation, which is especially detrimental to heat-sensitive materials.

[0005] Material conveying relies heavily on its coefficient of friction with metal surfaces and the viscosity of the melt itself. For materials with low coefficients of friction (such as certain powders), highly elastic melts, or melts with extremely low viscosity, slippage can easily occur, leading to a sharp drop in conveying efficiency or even interruption, resulting in poor production stability. This limits the versatility of traditional screw technology for handling various materials.

[0006] While shear flow fields are beneficial for distribution mixing (layered refinement), they are not effective for "dispersion mixing" where agglomerates need to be broken up and fillers or pigments need to be uniformly dispersed. They are also difficult to efficiently handle systems with extremely high dispersibility requirements, such as highly filled or nanocomposite materials.

[0007] The flow channel contains "dead zones," making cleaning and material change difficult: The screw's thread grooves and the gap between the barrel and screw can easily create areas where material can stagnate. These "dead zones" can cause small amounts of material to remain for extended periods, repeatedly exposed to heat, leading to carbonization and deterioration. When changing products or colors, cleaning becomes tedious and difficult to complete, impacting product quality and production flexibility.

[0008] Therefore, the field has long desired to develop a novel plasticizing and transporting principle and technical solution to fundamentally overcome the limitations of the shear-based approach. An ideal new technology should achieve efficient, low-energy-consumption melt plasticizing, possess stable and forced conveying capabilities (reducing dependence on material properties), provide excellent mixing and dispersion effects, and achieve self-cleaning, dead-angle-free flow channels to meet the urgent demands of modern polymer material processing for high efficiency, energy saving, flexibility, and high performance. Summary of the Invention

[0009] To overcome the shortcomings of the prior art, the purpose of this invention is to provide a method and apparatus for plasticizing and transporting materials using a triangular rotor based on extrusion normal stress. This invention can improve the dispersion and mixing effect, mass and heat transfer efficiency, and the range of melt viscoelasticity of materials, thereby realizing the forced conveying and transporting capacity of materials and solving the problems of long thermomechanical processes, high energy consumption, and dead zones in traditional polymer plasticizing and transporting methods.

[0010] To solve the above-mentioned technical problems, the specific technical solution of the present invention is as follows: In some embodiments of this application, a method for plasticizing and transporting materials using a triangular rotor based on extrusion normal stress is provided, comprising the following steps: S1: The triangular rotor with a Reuleaux triangle cross section is assembled into the barrel with an oblong inner cavity. Through the continuous meshing of the three vertices of the triangular rotor with the inner wall of the barrel, the volume between the triangular rotor and the barrel is divided into three mutually isolated cavities. S2: Drive the triangular rotor to rotate around its own circumcircle center axis and revolve in the same direction around the central axis of the barrel. The rotor motion drives the radial volume of the three cavities to change periodically. S3: Relying on the spiral change structure of the triangular rotor cross section along the axial direction and the spiral matching structure of the inner cavity cross section of the barrel and the triangular rotor, the circumferential position of the three cavities is spirally progressive along the axial direction, so as to realize the periodic change of the axial volume of the cavity. S4: During the periodic volume changes in the radial and axial directions of the cavity, the material is cyclically squeezed and stretched, simultaneously bearing axial and radial normal stresses, and sequentially completing compaction, degassing, melting, mixing and plasticizing. S5: Utilizing the forced thrust of axial normal stress, the plasticized material is driven to be transported axially in the extrusion direction, thereby achieving forced material transport.

[0011] In some embodiments of this application, a triangular rotor plasticizing and conveying device based on extrusion normal stress for implementing the above method includes: A triangular rotor, the cross-section of which is a Reuleaux triangle; The barrel has an inner cavity with a waist-shaped hole. The triangular rotor is housed in the inner cavity of the barrel, and the three vertices of the triangular rotor on any cross section are in contact with the inner wall of the barrel, thus isolating the volume between the triangular rotor and the inner cavity of the barrel into three independent cavities. And a power assembly for driving the triangular rotor.

[0012] In some embodiments of this application, the cross section of the triangular rotor is spirally varied along the axial direction with its circumscribed axis as the center to form a spiral segment. The pitch of the spiral segment can be varied along the material conveying direction. Several straight segments without spiral are provided at the transition points of the pitch variation.

[0013] In some embodiments of this application, the inner cross section of the barrel is spirally varied along its own axis, the ratio of the pitch of the spiral section of the barrel to the pitch of the spiral section of the triangular rotor is 2:3, and the straight sections of the barrel and the straight sections of the triangular rotor are arranged in a one-to-one correspondence.

[0014] In some embodiments of this application, the power assembly drives the triangular rotor to rotate and revolve simultaneously, wherein the axis of rotation is the central axis of the circumcircle of the triangular rotor, the axis of revolution is the central axis of the barrel, the rotation and revolution are in the same direction, and the ratio of the number of revolutions to the number of rotations is 3:1.

[0015] In some embodiments of this application, the distance between the rotation axis and the revolution axis is e, the two ends of the waist-shaped hole in the inner cavity of the barrel are semicircles, the diameter of which is equal to the outline size of the triangular rotor, and the length of the straight section in the middle is 4e.

[0016] In some embodiments of this application, a temperature control component is also included, which includes a heater, a cooler, and a temperature sensor disposed on the barrel for heating, cooling, and temperature monitoring and control of the material in the cavity.

[0017] In some embodiments of this application, a molding device is also included, which is connected to the discharge port of the barrel via a connector; the molding device is one of an extrusion molding device, an injection molding device, a blow molding device, or a casting molding device.

[0018] In some embodiments of this application, when the molding device is an extrusion molding device, the flow channel inside the die head changes in a wave-like pulsating manner along the extrusion direction, and the radial gap of the flow channel changes from large to small in sequence, and then from small to large.

[0019] In some embodiments of this application, when the molding device is an injection molding device, the inner cavity of the barrel is connected to the injection channel in the injection barrel, and a plunger is provided in the injection channel.

[0020] Compared with existing technologies, the beneficial effects of this invention are as follows: by replacing the traditional shear stress mode with extrusion normal stress as the main force, the mass and heat transfer efficiency and dispersion and mixing effect of materials are significantly improved, thereby shortening the thermomechanical process and reducing the energy consumption of the plasticizing process; at the same time, the forced propulsion mechanism based on axial normal stress achieves stable and efficient conveying with low dependence on material characteristics, effectively avoiding the slippage phenomenon that is prone to occur in traditional screws; in addition, the closed and continuously changing flow channel design eliminates dead corners, making it easy to clean and change materials, while the three-point support structure of the triangular rotor also enhances the uniformity of force and the reliability of operation of the device. Attached Figure Description

[0021] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This is a schematic diagram of the principle of the triangular rotor plasticizing and conveying device provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the triangular rotor plasticizing and conveying device provided in an embodiment of the present invention; Figure 3 for Figure 2 A schematic diagram showing the position of a triangular rotor within the inner cavity of the barrel along the transport direction, where one rotor pitch is within the rotor pitch. Figure 4 for Figure 2 A schematic diagram of the position of the triangular rotor at section AA within the inner cavity of the barrel after one rotation. Figure 5 This is a schematic diagram of the structure of the triangular rotor plasticizing, conveying and extruding molding equipment provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the triangular rotor plasticizing and injection molding equipment provided in an embodiment of the present invention.

[0022] Among them, 1 is a triangular rotor, 11 is a spiral section rotor, 12 is a straight section rotor, 13 is a rotor shaft, 2 is a barrel, 21 is a spiral section barrel, 22 is a straight section barrel, 23 is a feed port, 24 is a discharge port, 3 is a power component, 4 is a temperature control component, 41 is a heater, 42 is a cooler, 43 is a temperature sensor, 5 is an extrusion molding device, 51 is a transition flange, 52 is a die head seat, 53 is a conical mandrel, 54 is a flow divider, 55 is a die head body, 56 is an outer die, 57 is an outer die mandrel, 6 is an injection molding device, 61 is a connecting flange, 62 is a collector, 63 is an injection cylinder, 64 is an injection piston, 65 is an injection barrel, 66 is a nozzle, and 67 is an injection mold. Detailed Implementation

[0023] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0024] To better understand the purpose, structure, and function of this invention, the invention will be described in further detail below with reference to the accompanying drawings.

[0025] Example 1 This embodiment provides a triangular rotor plasticizing and conveying device based on extrusion normal stress that can be used as an independent extruder.

[0026] like Figure 1 and Figure 2 As shown, the device mainly consists of a triangular rotor 1, a barrel 2, a power assembly 3, and a temperature control assembly 4.

[0027] The triangular rotor 1 has a Reuleaux triangle cross-section (i.e., a triangle with equal width curves). With the central axis of its circumcircle as the axis, the cross-sectional shape of the triangular rotor 1 changes helically along the axial direction (i.e., the material conveying direction); this section is called the rotor helical section 11. The helix pitch T1 can be designed according to the processing requirements of different materials and can be changed along the conveying direction. In the transition region where the pitch changes, one or more straight rotor sections 12 without helical changes are provided, and the rotor cross-sectional shape of the straight section 12 remains unchanged along the axial direction. Preferably, the three acute vertices of the triangular rotor 1 can be rounded to reduce stress concentration and improve contact with the barrel.

[0028] The inner cavity of the barrel 2 has a waist-shaped cross-section. This waist-shaped hole, with its own central axis as the axis, also exhibits a spiral shape along the axial direction; this section is called the barrel spiral section 21. The pitch T2 of the barrel spiral section 21 maintains a fixed proportional relationship with the pitch T1 of the rotor spiral section 11, preferably T2:T1 = 2:3. The barrel 2 also has a barrel straight section 22 corresponding to the rotor straight section 12, and the inner cavity cross-sectional shape of the straight section 22 remains unchanged along the axial direction.

[0029] The triangular rotor 1 is housed within the inner cavity of the barrel 2. At any cross-section, the three vertices of the triangular rotor 1 always remain in contact with or tightly fitted against the inner wall of the oblong opening of the barrel 2, thereby dividing the annular space between the rotor and the barrel into three completely independent and closed cavities. Figure 2 (The chambers are labeled a, b, and c).

[0030] The power assembly 3 drives the triangular rotor 1 in a complex planetary motion. Specifically, the power assembly 3 drives the triangular rotor 1 to rotate around its own circumcircle's central axis (rotation axis), and simultaneously drives this rotation axis to revolve in the same direction around the central axis of the barrel 2 (revolution axis). The rotation axis and the revolution axis are parallel, with a fixed distance e between them. The ratio of the revolution speed to the rotation speed is 3:1, meaning that the triangular rotor 1 revolves three times around the barrel while rotating once on its own axis. This kinematic relationship ensures continuous engagement and sealing between the three vertices of the rotor and the inner wall of the barrel.

[0031] The specific structure of the waist-shaped hole in the inner cavity of the barrel 2 is as follows: both ends are two semicircles with equal radii, the diameter of which matches the outer contour size of the triangular rotor 1; the two semicircles are connected by a parallel straight line segment, the length of which is designed to be 4e. Under this structure, the movement trajectory of the center of the circumcircle of the triangular rotor 1 in the inner cavity of the barrel is a circle with an eccentricity e as the radius, and its maximum stroke is 2e.

[0032] The temperature control component 4 is integrated on the barrel 2 and includes a heater 41, a cooler 42, and a temperature sensor 43. The heater 41 is used to heat the barrel 2, and the heat is conducted to the material in the cavity through the barrel wall; the cooler 42 is used to cool the barrel 2; the temperature sensor 43 is used to monitor the temperature of the material or the barrel in real time, and coordinates heating and cooling through the control system to achieve precise and stable control of the processing temperature.

[0033] The plasticizing and transporting method of this embodiment is as follows, corresponding to the steps of claim 1: (S1) After assembly, three independent cavities are formed.

[0034] (S2) The power assembly 3 drives the triangular rotor 1 to perform the aforementioned planetary motion. As the rotor rotates and revolves, the cross-sectional area of ​​the three cavities in the radial plane perpendicular to the axis undergoes periodic pulsating changes: the cross-sectional area of ​​each cavity experiences a cycle from small to large, and then from large to small (e.g., ...). Figure 4 As shown in the figure, this is a periodic pulsation change in radial volume.

[0035] (S3) Because the cross-sections of both the rotor and the barrel change helically along the axial direction, and the pitch ratio is 2:3, the three cavities not only have a helical shape themselves, but their circumferential positions also progress helically along the axial direction. Simultaneously, the volume of the cavities also changes periodically along the axial direction (e.g.,Figure 3 As shown in the figure, this represents the periodic change of axial volume.

[0036] (S4) The material is added through the feed inlet 23 and enclosed in the three spiral cavities mentioned above. During the periodic alternation of the radial and axial volumes of the cavities, the material is cyclically squeezed and stretched, mainly bearing the axial and radial normal stresses from the cavity walls. Under the action of this normal stress field, the material successively undergoes compaction, degassing (devouring), melting, and mixing, ultimately achieving uniform plasticization.

[0037] (S5) The axial normal stress, while causing the material to deform, generates a forced thrust toward the discharge port 24. This thrust, combined with the helical motion of the cavity, drives the plasticized material to be transported axially, achieving forced conveying that does not depend on the viscoelasticity of the material.

[0038] Example 2 This embodiment provides an apparatus that integrates the above-mentioned plasticizing and conveying device with an extrusion molding device, which is suitable for the production of continuous products such as pipes.

[0039] like Figure 5 As shown, the equipment includes the triangular rotor plasticizing and conveying device described in Embodiment 1, and the extrusion molding device 5 connected to its barrel outlet 24 via a transition flange 51.

[0040] The extrusion molding apparatus 5 includes a die head seat 52, a die head body 55, an outer die 56, and internal components such as a conical mandrel 53, a flow divider 54, and a die mandrel 57. The die head seat 52 is connected to the barrel 2 via a transition flange 51. The conical mandrel 53 and the flow divider 54 are integrally formed and installed inside the die head body 55. The die mandrel 57 is threaded to the end of the conical mandrel 53 and is located inside the outer die 56, forming an annular die gap for tube forming.

[0041] Specifically, the melt flow channel formed by the outer sidewalls of the conical mandrel 53 and the die mandrel 57, and the inner sidewalls of the die head body 55 and the outer die 56, exhibits a wave-like pulsating change along the extrusion direction. That is, the radial clearance of the flow channel sequentially shows a periodic change pattern of "from large to small, and then from small to large".

[0042] The working process of this embodiment is as follows: The plasticizing and conveying device melts and plasticizes the polymer material, then continuously conveys it to the extrusion molding unit 5. The melt is uniformly divided into multiple strands by the conical mandrel 53 and the flow divider 54, and enters the aforementioned wave-shaped pulsating flow channel. In the flow channel, the melt is periodically compressed and released, mainly bearing normal stress. This process is beneficial for the relaxation, untangling, and stretching of the melt molecular chains, and can promote the complete fusion of multiple melt strands at the interface, effectively reducing weld lines and melt fracture in the final product. Finally, the uniformly fused melt is extruded into a tube through the shaping section formed by the die mandrel 57 and the outer die 56.

[0043] Example 3 This embodiment provides an apparatus that integrates the above-mentioned plasticizing and conveying device with an injection molding device, which is suitable for molding various complex-shaped products.

[0044] like Figure 6 As shown, the equipment includes the triangular rotor plasticizing and conveying device described in Embodiment 1, and the injection molding device 6 connected by the connecting flange 61.

[0045] The injection molding apparatus 6 mainly includes a feeder 62, an injection barrel 65, an injection piston 64, an injection cylinder 63 for driving the injection piston, a nozzle 66, and an injection mold 67. The inlet of the feeder 62 is connected to the barrel outlet 24 via a connecting flange 61, and the outlet is connected to the feed inlet of the injection barrel 65. The injection piston 64 is placed inside the injection barrel 65, and its rod end is connected to the injection cylinder 63.

[0046] The working process of this embodiment is as follows: During the plasticizing and metering stage, the plasticizing and conveying device operates continuously, transporting the plasticized polymer melt to the collector 62 and injecting it into the injection cylinder 65. The pressure of the melt pushes the injection piston 64 backward (to the right), completing the material storage. When the stored material reaches the set value, the plasticizing and conveying device pauses or slows down.

[0047] During the injection stage, the injection cylinder 63 drives the injection piston 64 to move forward (left), injecting the melt stored in the injection barrel 65 into the closed injection mold cavity 67 through the nozzle 66 at high pressure and high speed, thus completing the filling and holding pressure.

[0048] During the cooling and preparation phase of the product for the next cycle, the plasticizing and conveying unit is restarted to plasticize and store material for the next injection. This cycle repeats, enabling continuous and efficient injection molding operations.

[0049] In practical applications, the triangular rotor plasticizing and conveying device based on extrusion normal stress can also be used in combination with other polymer material molding and processing devices.

[0050] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0051] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0052] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0053] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to in the method section.

[0054] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. 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 invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for plasticizing and transporting materials using a triangular rotor based on extrusion normal stress, characterized in that, Includes the following steps: S1: The triangular rotor with a Reuleaux triangle cross section is assembled into the barrel with an oblong inner cavity. Through the continuous meshing of the three vertices of the triangular rotor with the inner wall of the barrel, the volume between the triangular rotor and the barrel is divided into three mutually isolated cavities. S2: Drive the triangular rotor to rotate around its own circumcircle center axis and revolve in the same direction around the central axis of the barrel. The rotor motion drives the radial volume of the three cavities to change periodically. S3: Relying on the spiral change structure of the triangular rotor cross section along the axial direction and the spiral matching structure of the inner cavity cross section of the barrel and the triangular rotor, the circumferential position of the three cavities is spirally progressive along the axial direction, so as to realize the periodic change of the axial volume of the cavity. S4: The material is cyclically squeezed and stretched during the periodic volume changes in the radial and axial directions of the cavity, and simultaneously bears axial and radial normal stresses, thus completing compaction, degassing, melting, mixing and plasticizing in sequence. S5: Utilizing the forced thrust of axial normal stress, the plasticized material is driven to be transported axially in the extrusion direction, thereby achieving forced material transport.

2. A triangular rotor plasticizing and conveying device based on extrusion normal stress for implementing the method of claim 1, characterized in that, include: A triangular rotor, the cross-section of which is a Reuleaux triangle; The barrel has an inner cavity with a waist-shaped hole. The triangular rotor is housed in the inner cavity of the barrel, and the three vertices of the triangular rotor on any cross section are in contact with the inner wall of the barrel, thus isolating the volume between the triangular rotor and the inner cavity of the barrel into three independent cavities. And a power assembly for driving the triangular rotor.

3. The apparatus according to claim 2, characterized in that, The cross section of the triangular rotor changes spirally along its circumcircle axis to form a spiral segment. The pitch of the spiral segment can vary along the material conveying direction. Several straight segments without spirals are provided at the transition points of the pitch changes.

4. The apparatus according to claim 2, characterized in that, The inner cross section of the barrel changes spirally along its own axis. The ratio of the pitch of the spiral section of the barrel to the pitch of the spiral section of the triangular rotor is 2:3, and the straight sections of the barrel and the straight sections of the triangular rotor are arranged in a one-to-one correspondence.

5. The apparatus according to claim 2, characterized in that, The power component drives the triangular rotor to rotate and revolve simultaneously. The axis of rotation is the central axis of the outer circle of the triangular rotor, and the axis of revolution is the central axis of the barrel. The rotation and revolution are in the same direction, and the ratio of the number of revolutions to the number of rotations is 3:

1.

6. The apparatus according to claim 5, characterized in that, The distance between the rotation axis and the revolution axis is e. The two ends of the waist-shaped hole in the inner cavity of the barrel are semicircles, and its diameter is equal to the outline size of the triangular rotor. The length of the straight section in the middle is 4e.

7. The apparatus according to claim 2, characterized in that, It also includes a temperature control component, which includes a heater, a cooler and a temperature sensor installed on the barrel, for heating, cooling and temperature monitoring and control of the material in the cavity.

8. The apparatus according to claim 2, characterized in that, It also includes a molding device, which is connected to the discharge port of the barrel via a connector; the molding device is an extrusion molding device or an injection molding device.

9. The apparatus according to claim 8, characterized in that, When the molding device is an extrusion molding device, the flow channel inside the die head changes in a wave-like pulsating manner along the extrusion direction, and the radial clearance of the flow channel changes from large to small and then from small to large.

10. The apparatus according to claim 8, characterized in that, When the molding device is an injection molding device, the inner cavity of the barrel is connected to the injection channel in the injection barrel, and a plunger is provided in the injection channel.

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