CN112265249B - Extrusion-stretching-based high polymer plasticizing transportation method, module, device and equipment - Google Patents

Abstract

The invention provides a polymer plasticizing and transporting method, module, device and equipment based on extrusion and stretching; wherein, the method refers to: the volume of transport space used for transporting polymer materials is realized in order from small to large Then the cycle changes from large to small; in the process of changing the volume of the transportation space from small to large, the polymer materials are forced to be incorporated into the transportation space; in the process of changing the volume of the transportation space from large to small, the polymer materials are Under the action of normal stress, it is compacted and plasticized, and then forced to discharge, so as to realize the positive displacement transportation and plasticized transportation of polymer materials depending on the volume change of the transportation space. The invention can shorten the thermo-mechanical history of the plasticizing transportation process, reduce the energy consumption of the plasticizing transportation, improve the transportation efficiency, and reduce the equipment volume and occupied space.

Description

Polymer plasticization and transportation method, module, device and equipment based on extrusion and stretching

technical field

The present invention relates to the technical field of polymer material plasticization and transportation, and more particularly, to a method, module, device and equipment for polymer plasticization and transportation based on extrusion stretching.

Background technique

High energy consumption in the process of polymer material molding and processing. Since the 1930s, screw machinery has been widely used, such as screw extruder, screw injection machine, etc., but whether it is extrusion product processing, or injection, calendering, In the processing of products such as blow molding, plastic raw materials must go through the basic and common process of solid conveying, melting and plasticizing, and the energy used in this process accounts for most of the energy consumption of polymer materials processing.

In the screw machine, the solid transport of the material is mainly based on the friction and drag of the screw on the material when the screw rotates. The melt transport relies on the viscous drag. The velocity gradient of the material is perpendicular to its flow and deformation direction. This flow and deformation are mainly Subject to the shear stress, the flow deformation is consistent with the direction of the shear stress. When the screw rotation cannot push the material, the screw can slip and idle, which does not belong to the category of forced extrusion transportation; therefore, it can be considered that the commonly used screw machinery is based on shearing. Rheological polymer material screw plasticizing transport equipment. In this way, there is a problem that the plasticizing transportation capacity is strongly dependent on the friction between the material and the surface of the metal barrel and the friction within the material. These two types of problems are related to the physical properties of the material itself, metal materials and technological processes. In screw machinery, measures such as slotting the solid conveying section of the barrel to increase the friction with the material, increasing the length-diameter ratio of the screw, and optimizing the screw structure can solve the above problems to a certain extent. However, these measures are bound to cause defects such as prolonged thermomechanical history, increased energy consumption, and large equipment structure during the plasticization and transportation of materials.

The subsequent design and modification of the new screw will not change the nature of its shear rheology. In order to change this situation, innovation in the way of processing polymer materials is urgently needed.

SUMMARY OF THE INVENTION

In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the present invention is to provide a polymer plasticizing and transporting method, module, device and equipment based on extrusion stretching; The mechanical process reduces the energy consumption of plasticizing transportation, improves the transportation efficiency, and reduces the size and space of the equipment.

In order to achieve the above-mentioned purpose, the present invention is achieved through the following technical solutions: a method for plasticizing and transporting polymers based on extrusion and stretching, characterized in that: the volume of the transport space used for transporting the polymer material is realized in turn by Periodically change from small to large and then from large to small; in the process of changing the volume of the transportation space from small to large, the polymer materials are forced to be incorporated into the transportation space; in the process of changing the volume of the transportation space from large to small, The polymer material is compacted and plasticized by normal stress, and then forced to discharge, so as to realize the positive displacement transportation and plasticized transportation of the polymer material depending on the volume change of the transportation space.

Preferably, multi-stage transport spaces are used to transport the polymer materials in series in sequence, so as to realize the plasticized transport of the polymer materials with multi-stage pressurization and acceleration.

A polymer plasticizing transport module is characterized in that: it includes at least one group of transport units; each group of transport units includes a stator with a stator inner cavity, an outer rotor and an inner rotor with outer teeth, and The first and second baffle plates are arranged on both sides of the stator; the inner cavity of the stator is matched with the outer surface of the outer rotor, so as to realize the rotatable arrangement between the outer rotor and the stator; the outer rotor is provided with an outer rotor with inner teeth a rotor inner cavity; the inner rotor is located in the outer rotor inner cavity, and the outer rotor and the inner rotor are eccentrically arranged; the inner teeth of the outer rotor inner cavity mesh with the outer teeth of the inner rotor, so that the inner rotor drives the outer rotor to rotate; A space is left between the inner rotor and the inner cavity wall of the outer rotor to form a transportation space whose volume changes periodically from small to large and then from large to small; the baffle plate or the stator is provided with a head end communicating with the transportation space. The feeding port is provided; the second material blocking plate or the stator is provided with a discharging port which is communicated with the end of the transport space.

In the polymer plasticizing and transporting module of the present invention, the eccentricity (e) of the inner rotor and the outer rotor is not adjustable, and the two have a definite meshing relationship; The material tray is surrounded by a space with a certain geometric shape. When the inner rotor rotates, the outer rotor that meshes with the inner rotor eccentrically rotates on the inner circumference of the inner cavity of the stator. Due to the existence of the eccentricity, the inner cavity wall of the outer rotor, the outer surface of the inner rotor, the baffle plate 1 and the baffle plate 2 are enclosed. The volume of the transport space changes periodically from small to large and then from large to small; when the volume of the transport space changes from small to large, the polymer material is gradually incorporated, and the polymer material plays a major role in the normal stress when the volume of the transport space changes from large to small. It is ground, compacted and exhausted under the action.

When the volume of the transport space changes periodically from small to large and then from large to small, the cross-sectional area of the polymer material passing through in the process of flow and deformation also changes periodically from small to large and then from large to small. The velocity gradient is consistent with the direction of its flow and deformation, which are mainly dominated by normal stress, which realizes the forced extrusion-stretch-plasticization transport process.

The present invention utilizes normal stress to forcibly transport the polymer material, and the plasticizing ability no longer depends on the friction force between the polymer material and the surface of the metal barrel and the internal friction force of the material during the plasticization and transportation process; The thermo-mechanical process reduces the energy consumption of plasticization and transportation, and reduces the effective equipment volume and occupied space; the plasticization and transportation capacity is less dependent on the physical properties of polymer materials, and the adaptability of polymer materials is high; The molecular material is uniformly plasticized, and at the same time, it can generate more pressure on the polymer material, speed up the plasticization speed and improve the plasticization quality.

Preferably, there are more than two transport units; each transport unit is laid side by side in sequence; there is a phase difference between adjacent transport units; the discharge port of the previous transport unit is The positions of the feeding ports are opposite, so that the transport spaces of each transport unit are communicated in sequence; each inner rotor is coaxially arranged and connected to the drive shaft respectively. The invention adopts multi-stage transport spaces to transport polymer materials in series according to the phases, so as to realize the multi-stage pressurization and speed-up plasticization transportation of polymer materials; make the plasticization of the polymer materials more uniform, and further improve the plasticization. quality.

Preferably, a bearing is provided between the outer rotor and the inner cavity wall of the stator.

A polymer plasticizing extrusion device is characterized in that: it includes at least one set of the above-mentioned polymer plasticizing and transporting modules; it also includes a feeding device for placing the polymer material to be transported, a stator outer lining and a the drive shaft connected to the drive device; the polymer material plasticizing and transporting module is arranged in the outer lining of the stator; the feeding device is communicated with the transport space of the polymer material plasticizing and transporting module; the driving shaft is connected with the inner rotor , to drive the inner rotor to rotate.

Preferably, a heater is also included; the heater is arranged on the outer lining of the stator. The heater can generate heat, and the heat is transferred to the transport space; the polymer material is melted and plasticized and discharged under the auxiliary action of external heating. the transport process.

Preferably, a screw extrusion unit is provided on the rear side of the polymer material plasticizing and transporting module; the screw extrusion unit includes a barrel and a screw; the barrel is connected to the polymer material plasticizing and transporting module; the screw The movable device is arranged in the barrel cavity of the barrel and is connected with the drive shaft, so that the drive shaft drives the screw to rotate.

A polymer plasticizing processing equipment is characterized in that it comprises the above-mentioned polymer plasticizing and extruding device.

Preferably, the polymer plasticizing processing equipment is a polymer plasticizing injection equipment; it also includes a plunger injection unit, a mold and a collector; the polymer material plasticizing extrusion device is injected through the collector and the plunger The unit is connected; the plunger injection unit is connected to the mold.

The present invention adopts the forced extrusion and stretching based on the use of positive stress to force the transport of polymer materials, and the plasticization capacity of the polymer materials in the process of plasticization and transportation no longer depends on the friction between the material and the surface of the metal barrel and the internal friction of the material. ; Compared with the prior art, the present invention has the following advantages and beneficial effects:

1. The present invention has positive stress in the conveying process, which shortens the thermomechanical history of the plasticizing and conveying process, resulting in a reduction in the energy consumption of plasticizing and conveying;

2. The plasticizing transportation of the present invention is completed by the volume change of the enclosed space with a specific shape, the process is continuous, and it has a completely positive displacement characteristic, and the transportation efficiency is improved;

3. The plasticizing and transporting process of the present invention is completed within a very short thermomechanical process, and the plasticizing and transporting equipment is small in volume and footprint;

4. The plasticizing and transporting capacity of the present invention has low dependence on the physical properties of the polymer material, and the polymer material has high adaptability;

5. The present invention realizes step-by-step pressurization, so that the melt is plasticized evenly, and at the same time, it can generate greater pressure on the melt, so as to speed up the plasticizing speed and plasticizing quality.

Description of drawings

1 is a schematic structural diagram of a polymer plasticizing and transporting module in Example 1;

2 is a cross-sectional view of a polymer plasticizing and transporting module in Example 1;

3 is a schematic diagram of the principle of a polymer plasticizing and transporting module in Example 1;

Fig. 4 is the structural representation of the polymer plasticizing and transporting module of the second embodiment;

5 is a schematic structural diagram of a polymer plasticizing and transporting module in Example 3;

Fig. 6 is the structural representation of embodiment four polymer plasticizing extrusion device;

Fig. 7 is the structural representation of the polymer plasticizing extrusion device of the fifth embodiment;

Fig. 8 is the structural schematic diagram of the polymer plasticizing injection equipment of Example 6;

Among them, 1 is the transport unit, 11 is the stator, 12 is the outer rotor, 13 is the inner rotor, 14 is the baffle plate one, 15 is the baffle plate two, 16 is the feeding port, 17 is the discharging port, and 18 is the feeding port. Transport space, 2 is the feeding device, 3 is the stator outer lining, 4 is the connecting piece, 5 is the drive shaft, 6 is the screw extrusion unit, 61 is the barrel, 62 is the screw, 7 is the plunger injection unit, 71 72 is an injection piston, 73 is an injection barrel, 74 is a nozzle, 8 is a mold, 9 is a collector, and 10 is a heater.

Detailed ways

The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

Example 1

In this embodiment, a method for plasticizing and transporting polymers based on extrusion and stretching, the volume of the transport space used for transporting polymer materials is cyclically changed from small to large and then from large to small; In the process of changing the volume from small to large, the polymer material is forced into the transportation space; in the process of changing the volume of the transportation space from large to small, the polymer material is compacted and plasticized by normal stress, and then forced to Discharge, so as to realize the positive displacement transportation and plasticization transportation of polymer materials depending on the volume change of the transportation space.

In order to realize the polymer plasticization and transportation method based on extrusion and stretching, this embodiment provides a polymer plasticization and transportation module, as shown in Fig. 1 to Fig. 3 , including a group of transportation units 1; the transportation unit 1 includes a stator 11 with a stator cavity, an outer rotor 12 and an inner rotor 13 with outer teeth, as well as a blocking plate 14 and a blocking plate 2 15 arranged on both sides of the stator 11 respectively.

The inner cavity of the stator is matched with the outer surface of the outer rotor 12 to realize the rotatable arrangement between the outer rotor 12 and the stator 11; a bearing is preferably provided between the outer rotor 12 and the inner cavity wall of the stator to ensure the flexible rotation of the outer rotor. The outer rotor 12 is provided with an outer rotor inner cavity with inner teeth; the inner rotor 13 is located in the outer rotor inner cavity, and the outer rotor 12 and the inner rotor 13 are eccentrically arranged; The outer teeth are meshed, so that the inner rotor 13 drives the outer rotor 12 to rotate; a space is left between the inner rotor 13 and the inner cavity wall of the outer rotor to form a transport space 18 whose volume changes periodically from small to large and then from large to small; The first stopper plate 14 is provided with a feed port 16 which communicates with the head end of the transport space 18 ; the second stopper plate 15 is provided with a discharge port 17 which communicates with the end of the transport space 18 .

In the polymer plasticization and transportation module of the present invention, the eccentricity (e) of the inner rotor 13 and the outer rotor 12 is not adjustable, and the two have a definite meshing relationship; the inner cavity wall of the outer rotor, the outer surface of the inner rotor 13, the baffle plate The first 14 and the second baffle plate 15 enclose a space with a certain geometric shape. When the inner rotor 13 rotates, the outer rotor 12 meshing with the inner rotor 13 eccentrically rotates on the inner circumference of the inner cavity of the stator. The volume of the transportation space 18 enclosed by the second tray 15 changes periodically from small to large and then from large to small; when the volume of the transportation space 18 changes from small to large, the polymer materials are gradually incorporated, and the volume of the transportation space 18 changes from large to large. The polymer material is ground, compacted and exhausted under the main effect of normal stress. As shown in Figure 3, the inner rotor and the outer rotor pass through areas A, B, C, and D in turn during counterclockwise rotation; A is the entry cavity, B is the negative pressure area, C is the squeezed area, and D is the extrusion cavity.

After the inner rotor 13 meshes with the outer rotor 12, when the meshing lines of the inner rotor 13 and the outer rotor 12 are separated from each other, the volume of the transport space changes from small to large, and negative pressure will be formed at the entrance to the cavity to continuously suck the melt in. The sucked melt is in a negative pressure state in the area at the B area; the inner rotor 13 gradually moves into the B area of the outer rotor 12. When the meshing lines of the inner rotor 13 and the outer rotor 12 are embedded in each other, the inner and outer teeth gradually move. Joining, the volume of the transport space changes from large to small, and the melt flowing into the closed space at the C area is in an extruded state, and the pressure of the closed space will continue to increase, so that the plasticized melt will be Extrusion cavity extrusion. When the volume of the transportation space changes from small to large, the polymer material can be incorporated through the feed port 16 on the baffle plate 14. When the volume of the transportation space changes from large to small, the polymer material is ground and pressed under the main action of normal stress. Solid, exhaust, plasticized, and discharged from the discharge port 17 on the baffle plate 15.

When the volume of the transport space 18 changes periodically from small to large and then from large to small, the cross-sectional area of the polymer material passing through during the flow and deformation process also changes periodically from small to large and then from large to small. The velocity gradient is consistent with its flow and deformation direction. This flow and deformation are mainly dominated by normal stress, which realizes the forced extrusion, stretch, plasticization and transportation process.

The present invention utilizes normal stress to forcibly transport the polymer material, and the plasticizing ability no longer depends on the friction force between the polymer material and the surface of the metal barrel and the internal friction force of the material during the plasticization and transportation process; The thermo-mechanical process reduces the energy consumption of plasticization and transportation, and reduces the effective equipment volume and occupied space; the plasticization and transportation capacity is less dependent on the physical properties of polymer materials, and the adaptability of polymer materials is high; The molecular material is uniformly plasticized, and at the same time, it can generate more pressure on the polymer material, speed up the plasticization speed and improve the plasticization quality.

Embodiment 2

This embodiment is a polymer plasticizing and transporting module. The difference from the first embodiment is that: in this embodiment, the feeding port 16 is not provided on the material baffle plate 1, but is provided in the stator 11. 16 communicates with the head end of the transport space 18, as shown in FIG. 4 . In practical applications, the discharge port may not be provided on the second stopper plate, but on the stator, and the discharge port is communicated with the end of the transport space. The rest of the structure of this embodiment is the same as that of the first embodiment.

Embodiment 3

This embodiment is a method for plasticizing and transporting polymers based on extrusion and stretching. The difference from Embodiment 1 is that: in this embodiment, multiple transport spaces are used in series to transport polymer materials in series in sequence; The volume of the transportation space can be changed periodically from small to large and then from large to small; in the process of changing the volume of the transportation space from small to large, the polymer materials are forced to be incorporated into the transportation space; the volume of the transportation space is changed from In the process of changing from large to small, the polymer material is compacted and plasticized by normal stress, and then forced to discharge, so as to realize the multi-stage pressurization and speed-up of plasticized transportation of the polymer material.

In order to realize the polymer plasticization and transportation method based on extrusion and stretching, further optimization is made on the basis of the polymer plasticization and transportation module described in the first embodiment.

As shown in FIG. 5 , there are more than two transport units 1; for example, five transport units are used in this embodiment, but in practical applications, there may be two, three, four, six, seven, or even more The more the number of transport units, the better the plasticizing effect. The respective transport units 1 are arranged side by side in a close fit; the stators 11 between the respective transport units 1 are installed separately, and the grooves on the stator 11 are uniformly fixed and connected with wedges. There is a phase difference between adjacent transport units 1, so that the discharge port 17 of the previous transport unit 1 is opposite to the feed port 16 of the latter transport unit 1, so as to realize the transportation of each transport unit 1 The spaces 18 are sequentially connected. In this embodiment, the eccentric directions of the inner rotors 13 of adjacent transport units relative to the outer rotors 14 are opposite. Each of the inner rotors 13 is coaxially arranged and connected to the drive shaft.

The present invention adopts the multi-segment transport space 18 to transport polymer materials in series in sequence; the melt plastic extruded from the previous stage is sucked into the entry cavity area of the plasticizing unit of the rotor pump of the next stage due to the action of negative pressure , and then realize the step-by-step pressurization and speed-up function of the plasticized molten plastic in the plasticizing unit of the rotor pump; the plasticization of the polymer material is more uniform, and the plasticization quality is further improved.

After the high-pressure and high-speed melt extruded from the plasticizing unit of the last stage rotor pump passes through a die of a certain shape, it is quickly extruded in a shape similar to the die shape, and is formed after cooling to obtain the required strength, Plastic products with geometric shapes.

Embodiment 4

A polymer plasticizing extrusion device in this embodiment, as shown in FIG. 6 , includes any one group of polymer plasticizing and transporting modules in Embodiments 1 to 3; and also includes an input material for placing polymer materials to be transported The device 2, the stator outer lining 3 and the drive shaft 5 for connecting with the driving device; the polymer material plasticizing and transporting module is arranged in the stator outer lining 3; the feeding device 2 and the polymer material plasticizing and transporting module are transported The transport space is connected; the drive shaft 5 is connected with the inner rotor to drive the inner rotor to rotate. The feeding device 2 can use a hopper; when the polymer material enters the hopper, the end of the hopper is provided with a viewing window, which is convenient for observing the condition of the polymer material. In the lower part of the viewing window, a plug-in plate is set to control the feeding speed of the hopper.

Embodiment 5

This embodiment is a polymer plasticizing and extruding device, which is different from the fourth embodiment in that: as shown in FIG. 7 , in this embodiment, a screw extrusion unit is provided on the rear side of the polymer material plasticizing and transporting module 6; The screw extrusion unit 6 includes a barrel 61 and a screw 62; the barrel 61 is connected with the polymer material plasticizing and transporting module; the screw 62 is movably arranged in the barrel cavity of the barrel and is connected with the drive shaft 5 to achieve The drive shaft 5 drives the screw 62 to rotate.

The drive shaft 5 drives the inner rotor of the conveying unit 1 and the screw 62 of the screw extruding unit 6 to rotate, and the polymer material in the hopper is brought into the conveying unit 1, and then enters the screw extruding unit 6 after being plasticized for further plasticization and processing. Homogenized, and then extruded, cooled and shaped through a die connected to the barrel 61 of the screw extrusion unit 6 to obtain a product.

In this embodiment, a heater 10 is also included; the heater 10 is arranged on the stator outer lining and the cylinder body 61 to realize the heating of the stator outer lining and the cylinder body 61, the heat is transferred to the transport space 18, and the polymer material is heated externally Under the auxiliary action, it is melted and plasticized and discharged. Under the dual action of external heating and forced extrusion heat, the polymer material can complete the plasticization and transportation process in a relatively short time.

Embodiment 6

In this embodiment, the application of the polymer plasticizing extrusion device to the polymer plasticizing injection equipment is taken as an example for description. As shown in FIG. 8 , the polymer plasticizing injection equipment includes the polymer plasticizing extrusion device in any one of Embodiments 4 to 6; it also includes a plunger injection unit 7, a mold 8 and a collector 9; the polymer material plasticizing The extrusion device is connected with the plunger injection unit through the accumulator 9 ; the plunger injection unit is connected with the mold 8 .

The plunger injection unit 7 is composed of injection cylinder 71 , injection piston 72 , injection barrel 73 , nozzle 74 and other parts. The feed end face of the accumulator 9 is fixedly connected with the discharge end face of the polymer plasticizing extrusion device, and the discharge end face of the accumulator 9 is fixedly connected with the feed end face of the injection barrel 73 of the plunger injection unit 7 . The melt plasticized by the polymer plasticizing extrusion device enters the injection barrel 73 through the accumulator 9, and the injection piston 72 retreats under the pressure of the melt. When the storage volume in the injection barrel 73 reaches the requirements of the injection product When the metering value is reached, the polymer plasticizing extrusion device stops plasticizing, and the plasticizing metering process ends. After the filling and pressure keeping processes are completed, the polymer plasticizing extrusion device starts plasticizing in the cooling stage of the product, and the equipment starts a new cycle of product molding.

In practical applications, the polymer plasticizing extrusion device can also be applied to other polymer plasticizing processing equipment.

The above-mentioned embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited by the above-mentioned embodiments, and any other changes, modifications, substitutions, combinations, The simplification should be equivalent replacement manners, which are all included in the protection scope of the present invention.

Claims (8)

1. a polymer plasticizing transport module, it is characterized in that: comprise at least one group of transport units; each group of transport units all include stator with stator inner cavity, outer rotor and inner rotor with outer teeth, The first and second stopper plates are respectively arranged on both sides of the stator; the inner cavity of the stator is matched with the outer surface of the outer rotor, so as to realize the rotatable arrangement between the outer rotor and the stator; the outer rotor is provided with inner teeth The inner rotor is located in the inner cavity of the outer rotor, and the outer rotor and the inner rotor are eccentrically arranged; the inner teeth of the inner cavity of the outer rotor mesh with the outer teeth of the inner rotor, so that the inner rotor drives the outer rotor Rotation; space is left between the inner rotor and the inner cavity wall of the outer rotor to form a transportation space whose volume changes periodically from small to large and then from large to small; The feeding port is connected to the end; the second material blocking plate or the stator is provided with a discharging port that is communicated with the end of the transport space. 2 . The polymer plasticization and transportation module according to claim 1 , wherein the number of the transportation units is two or more; the transportation units are arranged side by side in sequence; there is a phase between adjacent transportation units. 3 . Poor; the discharge port of the previous transport unit is opposite to the feed port of the latter transport unit, so that the transport spaces of each transport unit are connected in sequence; each inner rotor is coaxially arranged and connected to the drive shaft respectively . 3 . The polymer plasticizing and transporting module according to claim 1 , wherein a bearing is provided between the outer rotor and the inner cavity wall of the stator. 4 . 4. A polymer plasticizing extrusion device, characterized in that: it comprises at least one set of polymer plasticizing and transporting modules according to any one of claims 1 to 3; The material feeding device, the stator outer lining and the drive shaft for connecting with the driving device; the polymer material plasticizing and transporting module is arranged in the stator outer lining; the feeding device and the polymer material plasticizing and transporting The transport space of the module is communicated; the drive shaft is connected with the inner rotor to drive the inner rotor to rotate. 5 . The polymer plasticizing extrusion device according to claim 4 , further comprising a heater; the heater is arranged on the outer lining of the stator. 6 . 6. The polymer plasticizing extrusion device according to claim 4, characterized in that: a screw extruding unit is provided on the rear side of the polymer material plasticizing and transporting module; the screw extruding unit comprises a barrel and a screw; The barrel is connected with the polymer material plasticizing and transporting module; the screw is movably arranged in the barrel cavity of the barrel, and is connected with the drive shaft, so that the drive shaft drives the screw to rotate. 7. A polymer plasticizing processing equipment, characterized in that: comprising the polymer plasticizing extrusion device according to claim 4. 8 . The polymer plasticizing processing equipment according to claim 7 , wherein the polymer plasticizing processing equipment is a polymer plasticizing injection equipment; it also comprises a plunger injection unit, a mold and a collector; The polymer material plasticizing and extruding device is connected with the plunger injection unit through the accumulator; the plunger injection unit is connected with the mold.

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