CN203863962U - Eccentric rotor volume impulse deformation plasticization transportation device - Google Patents

Abstract

The utility model discloses an eccentric rotor volume pulsating deformation plastic transport device, through alternately setting the rotor eccentric spiral section and the rotor eccentric straight line section in the inner cavity of the rotor and the stator respectively, so that the transport volume of the material is axially and vertically aligned with the rotor. The alternating periodic changes in the radial direction realize volume pulsation, deformation, melting, plasticization and transportation, and the axial pressure generated by the material is borne by the swinging component; the device includes a stator, a rotor and a swinging component. Swing assembly; the rotor includes a plurality of rotor eccentric helical sections and a plurality of rotor eccentric straight sections that are alternately connected, and the inner cavity of the stator is also provided with a plurality of stator helical sections and a plurality of stator straight sections that are alternately connected; each rotor eccentric helical section is connected to each The helical segments of the stator are in one-to-one correspondence, and the eccentric linear segments of the rotor are in one-to-one correspondence with the linear segments of the stator. The utility model strengthens the mass transfer and heat transfer effect in the plasticizing and transporting process of the polymer, and is beneficial to shortening the thermomechanical process and reducing energy consumption.

Description

An eccentric rotor volume pulsation deformation plastic transport device

technical field

The utility model relates to the technical field of plasticizing processing of polymer materials, in particular to an eccentric rotor volume pulsating deformation plasticizing transport device.

Background technique

In the process of polymer processing and molding, the polymer must be plasticized and melted by the plasticizing transport device and transported to a mold with a specific shape to form a product. On the one hand, the polymer plasticizing and transporting process accounts for most of the energy consumption in the polymer processing and molding process; on the other hand, different types of inorganic fillers and various plant fibers can be used in the polymer plasticizing and transporting process Filling into the polymer matrix, or blending different types of polymers to obtain polymer composites with excellent performance, to meet the needs of contemporary industry development. The plasticizing and transportation process of polymer plays a decisive role in reducing energy consumption, improving polymer mixing effect and improving product performance. Therefore, the development needs of polymer processing and molding technology can be met by changing the plasticizing transport in the process of polymer processing.

At present, the polymer plasticizing transportation technology and equipment widely used at home and abroad mainly use the screw as the core component and principle feature. However, due to the shear-drag processing principle of the screw, the equipment with this structure generally suffers from high processing energy consumption, dispersion and mixing Poor effect, long thermomechanical process, complex equipment structure, difficult to process materials with complex shapes and other defects.

However, the blade polymer plasticizing transport method based on extensional rheology is to force the material to melt, plasticize and mix through the periodic change of the material processing volume. The flow and deformation of the material are mainly dominated by the tensile stress, and the main velocity gradient and its main The directions of flow and deformation are consistent, showing extensional rheological behavior, thus solving the problem that the plasticizing ability of screw processing machinery mainly depends on the external friction force and internal friction force of the material. Compared with the screw plasticizing transportation method, the blade plasticizing transportation method has the advantages of low energy consumption, short thermomechanical process, high adaptability to materials, and good dispersion and mixing effect. However, during the plasticizing and transporting process of the blade, the polymer transport channel is not streamlined, and there are dead angles in the flow channel, which is not conducive to the plasticization and mixing modification of processing heat-sensitive polymers.

It can be seen that, in view of the problems existing in the current plasticizing transportation process, the development of a new type has the advantages of low energy consumption, short thermomechanical process, high adaptability to materials, and good dispersion and mixing effects. New plasticizing transportation methods and devices that are easy to exhaust are of great significance to polymer processing and molding.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art, and provide a volume pulsating deformation and plasticization transportation device of an eccentric rotor to solve the problem of long thermomechanical history, high energy consumption, and poor flow channels experienced by materials in the polymer molding process. dead ends etc.

The technical scheme of the utility model is: an eccentric rotor volume pulsation deformation plastic transportation device, including a stator, a rotor and a swing assembly, the rotor is arranged in the inner cavity of the stator, and a swing assembly is arranged at one end of the rotor; the rotor includes a plurality of rotor eccentric spiral segment and a plurality of rotor eccentric straight segments, the rotor eccentric helical segment and the rotor eccentric straight segment are alternately connected; the inner cavity of the stator is also provided with a plurality of stator helical segments and a plurality of stator straight segments, and the stator helical segment and the stator straight segment are alternately connected; The rotor eccentric helical section corresponds to each stator helical section one by one, and each rotor eccentric straight line section corresponds to each stator straight line section one to one.

On the rotor, along the conveying direction of the material, the pitch and axial length of each eccentric helical section of each rotor gradually decrease, and the axial length of each rotor eccentric straight line section gradually decreases;

On the stator, along the conveying direction of the material, the pitch and axial length of each stator helical section gradually decrease, and the axial length of each stator straight section gradually decreases.

An eccentric spiral cavity is formed between the rotor eccentric spiral section and the stator spiral section, and an eccentric linear cavity is formed between the rotor eccentric straight section and the stator straight section; the radial section of the eccentric spiral cavity and the radial direction of the eccentric linear cavity The cross section is long hole shape. In the eccentric spiral cavity, while the rotor rotates around the axis of the rotor, it also rolls around the axis of the stator in the inner cavity of the stator. The material is propelled in the sealed cavity formed between the stator and the rotor in a spiral manner. At the same time, during the propelling process The polymer formed by the material realizes the processes of compaction, exhaust, melting, melt transportation, mixing and so on. In the eccentric linear cavity, while the rotor rotates around the rotor axis, it also rolls up and down along the inner cavity of the stator, and the material advances in the sealed chamber in a linear manner.

In the eccentric helical cavity, the eccentric helical section of the rotor meshes with the helical section of the stator. On the radial section of the eccentric helical cavity, the movement stroke of the rotor in the inner cavity of the stator is twice the maximum eccentricity of the rotor.

In the eccentric linear cavity, the eccentric linear section of the rotor meshes with the stator linear section. On the radial section of the eccentric linear cavity, the movement stroke of the rotor in the inner cavity of the stator is twice the maximum eccentricity of the rotor.

The swing assembly includes a universal joint, a transmission shaft and a rotor joint, the rotor joint is hinged to the transmission shaft through the first cross head, and the transmission shaft is hinged to the universal joint through the second cross head. The setting of the swing assembly enables the rotor to realize revolution (that is, the rotor rolls around the axis of the stator or rolls up and down in the inner cavity of the stator) and autorotation (that is, the rotor rotates around its own axial direction) at the same time. When the rotor moves to the maximum eccentricity, the transmission The shaft will be in contact with the universal joint to form a contact pair, and the contact pair will bear the axial pressure generated by the melting and plasticizing of the polymer.

The eccentric rotor volume pulsating deformation plasticizing transport device with the above structure can be used alone as an extruder, or can be combined with various types of injection units to form an injection machine.

When the above-mentioned eccentric rotor volume pulsating deformation plasticizing transport device is combined with the injection device to form an injection machine, the output end of the stator is externally connected to the cylinder of the injection device through a connecting piece, and the inner cavity of the stator communicates with the injection channel in the cylinder , a plunger is provided in the injection channel.

Through the above-mentioned device, a volume pulsating deformation and plastic transportation method of an eccentric rotor can be realized. By alternately arranging rotor eccentric spiral sections and rotor eccentric straight sections on the rotor, corresponding stator helical sections and stator straight sections are alternately arranged on the inner cavity of the stator. section, so that the transport volume of the material undergoes periodic changes in the axial and radial directions along the rotor to realize volume pulsation deformation, melting and plastic transport; during the material transport process, the swing component bears the axial pressure generated by the material.

During the material conveying process, in the eccentric spiral cavity, while the rotor rotates around the rotor axis, it also rolls around the stator axis in the inner cavity of the stator; in the eccentric linear cavity, while the rotor rotates around the rotor axis, Also roll up and down the stator cavity.

Compared with the prior art, the utility model has the following beneficial effects:

1. By changing the structure of the inner cavity of the rotor and the stator, the periodic change of the transport volume of the material along the axial and radial directions of the rotor is realized, which strengthens the mass transfer and heat transfer effect during the plasticizing transport of polymers. It is beneficial to shorten the thermomechanical process, reduce energy consumption, and improve the dispersion and mixing effect at the same time.

2. In the process of plasticizing and transporting, the flow path can be streamlined without dead angle, which is beneficial to the plasticizing and mixing modification of processing heat-sensitive polymers. At the same time, by controlling the fit clearance between the rotor and the stator, the exhaust capacity of the plasticizing transportation process can be effectively controlled.

3. The eccentric rotor volume pulsation deformation plasticizing transport device has a simple structure and is convenient for assembly and disassembly. It can be used alone as an extruder or combined with various types of injection units to form an injection machine. It has a wide range of applications.

Description of drawings

Fig. 1 is a schematic structural diagram of the eccentric rotor volume pulsating deformation plasticizing transport device.

Fig. 2 is a schematic diagram of the structure when the transmission shaft and the universal joint in Fig. 1 are in contact to form a contact pair.

FIG. 3 is a cross-sectional view along line A-A of FIG. 1 .

Fig. 4 is a B-B sectional view of Fig. 1 .

Fig. 5 is a C-C sectional view of Fig. 1 .

Fig. 6 is a schematic diagram of the movement state of the rotor in the inner cavity of the stator on the section C-C in Fig. 1 .

Fig. 7 is a schematic diagram of the motion state of the rotor in the inner cavity of the stator on the section D-D in Fig. 1 .

Fig. 8 is a schematic diagram of the structure of the eccentric rotor volume pulsating deformation plasticizing transport device and the injection device combined into an injection machine.

Detailed ways

The utility model will be further described in detail below in conjunction with the embodiments and accompanying drawings, but the implementation of the utility model is not limited thereto.

Example 1

The eccentric rotor volume pulsating deformation plasticizing transport device of this embodiment is used solely as an extruder.

As shown in Figure 1, the eccentric rotor volume pulsating deformation plastic transportation device includes a stator 3, a rotor 4 and a swing assembly, the rotor is arranged in the inner cavity of the stator, and a swing assembly is arranged at one end of the rotor; the rotor includes a plurality of rotor eccentric helical segments and multiple rotor eccentric straight sections, rotor eccentric helical sections and rotor eccentric straight sections are alternately connected; the inner cavity of the stator is also provided with multiple stator helical sections and multiple stator straight sections, and the stator helical sections and stator straight sections are alternately connected; each rotor The eccentric helical sections correspond to the stator helical sections one by one, and the rotor eccentric straight sections correspond to the stator straight sections one by one. Among them, the changes of different sections when the eccentric helical section of the rotor is connected with the helical section of the stator are shown in Fig. 3, Fig. 4 or Fig. 5 .

On the rotor, along the conveying direction of the material, the pitch and axial length of the eccentric helical sections of each rotor gradually decrease, and the axial length of the eccentric straight section of each rotor gradually decreases;

On the stator, along the conveying direction of the material, the pitch and axial length of each stator helical section gradually decrease, and the axial length of each stator straight section gradually decreases.

In the above structure, an eccentric helical cavity is formed between the eccentric helical section of the rotor and the helical section of the stator, and an eccentric linear cavity is formed between the eccentric straight section of the rotor and the straight section of the stator; the radial section of the eccentric helical cavity and the eccentric linear cavity The radial sections are all slotted. As shown in Figure 6, in the eccentric spiral cavity, while the rotor rotates around the axis of the rotor, it also rolls around the axis of the stator in the inner cavity of the stator, and the material advances in the sealed cavity formed between the stator and the rotor in a spiral manner. , At the same time, the polymer formed by the material during the propulsion process realizes compaction, exhaust, melting, melt transportation, mixing and other processes. As shown in Figure 7, in the eccentric linear cavity, while the rotor rotates around the rotor axis, it also rolls up and down along the inner cavity of the stator, and the material advances in the sealed chamber in a linear manner.

In the eccentric helical cavity, the eccentric helical section of the rotor meshes with the helical section of the stator. On the radial section of the eccentric helical cavity, the movement stroke of the rotor in the inner cavity of the stator is twice the maximum eccentricity of the rotor.

In the eccentric linear cavity, the eccentric linear section of the rotor meshes with the stator linear section. On the radial section of the eccentric linear cavity, the movement stroke of the rotor in the inner cavity of the stator is twice the maximum eccentricity of the rotor.

The swing assembly includes a universal joint 1 , a transmission shaft 2 and a rotor joint 7 , the rotor joint is hinged to the transmission shaft through the first crosshead 5 , and the transmission shaft is hinged to the universal joint through the second crosshead 6 . The setting of the swing assembly enables the rotor to realize revolution (that is, the rotor rolls around the axis of the stator or rolls up and down in the inner cavity of the stator) and autorotation (that is, the rotor rotates around its own axial direction) at the same time. When the rotor moves to the maximum eccentricity, the transmission The shaft will be in contact with the universal joint to form a contact pair, as shown in Figure 2, through which the contact pair bears the axial pressure generated by the plasticizing and transporting process of the polymer melt.

In this embodiment, a volume pulsating deformation and plastic transportation method of an eccentric rotor can be realized through the above-mentioned device, by alternately setting the rotor eccentric helical section and the rotor eccentric straight line section on the rotor, and alternately arranging the corresponding stator helical section on the inner cavity of the stator and the straight section of the stator, so that the transport volume of the material undergoes periodic changes in the axial and radial directions along the rotor, realizing volume pulsating deformation, melting and plasticizing transport; during the material transport process, the swing component bears the shaft generated by the material to pressure.

During the material conveying process, in the eccentric spiral cavity, while the rotor rotates around the rotor axis, it also rolls around the stator axis in the inner cavity of the stator; in the eccentric linear cavity, while the rotor rotates around the rotor axis, Also roll up and down the stator cavity.

Example 2

The eccentric rotor volume pulsating deformation plasticizing transport device of this embodiment is combined with the injection device to form an injection machine.

Compared with Embodiment 1, the difference is that, as shown in Figure 8, the output end of the stator is externally connected to the cylinder 9 of the injection device through the connecting piece 8, the inner cavity of the stator communicates with the injection channel in the cylinder, and the injection flow A plunger 10 is provided in the channel.

When in use, the eccentric rotor volume pulsating deformation plasticizing transport device plasticizes and melts the material, and transports it into the injection channel of the cylinder body, while the plunger is continuously retreated. When the polymer melt storage volume in the cylinder reaches the metering value required by the injection product, the eccentric rotor volume pulsation deformation plasticizing transport device stops plasticizing and melting, and the plasticizing metering process of the injection machine ends. After the injection machine completes the mold filling and pressure holding process, in the cooling stage of the product, the eccentric rotor volume pulsation deformation plasticization and transportation device starts plasticization and transportation, and the injection machine starts a new cycle of product molding.

As mentioned above, the utility model can be better realized, and the above-described embodiment is only a preferred embodiment of the utility model, and is not used to limit the scope of implementation of the utility model; that is, all equal changes made according to the contents of the utility model and modifications are all covered by the scope of protection required by the claims of the present utility model.

Claims (7)

1. an eccentric rotor volume fluctuation deformation plasticizing feeding device, is characterized in that, comprise stator, rotor and wobble component, rotor is located in bore of stator, and rotor one end arranges wobble component; Rotor comprises a plurality of rotor eccentricity spiral sections and a plurality of rotor eccentricity straightway, and rotor eccentricity spiral section is alternately connected with rotor eccentricity straightway; Bore of stator is also provided with a plurality of stator spiral sections and a plurality of linear stator section, and stator spiral section is alternately connected with linear stator section; Each rotor eccentricity spiral section is corresponding one by one with each stator spiral section, and each rotor eccentricity straightway is corresponding one by one with each linear stator section.

2. a kind of eccentric rotor volume fluctuation deformation plastifies feeding device according to claim 1, it is characterized in that, on described rotor, along the throughput direction of material, pitch and the axial length of each rotor eccentricity spiral section all reduce gradually, and the axial length of each rotor eccentricity straightway reduces gradually;

On stator, along the throughput direction of material, pitch and the axial length of each stator spiral section all reduce gradually, and the axial length of each linear stator section reduces gradually.

3. a kind of eccentric rotor volume fluctuation deformation plastifies feeding device according to claim 1, it is characterized in that, between described rotor eccentricity spiral section and stator spiral section, form eccentric spiral cavity, between rotor eccentricity straightway and linear stator section, form eccentric straight-line cavity; The eccentric radial section of spiral cavity and the radial section of eccentric straight-line cavity are slotted hole shape.

4. a kind of eccentric rotor volume fluctuation deformation plastifies feeding device according to claim 3, it is characterized in that, in described eccentric spiral cavity, rotor eccentricity spiral section and stator spiral section are connected with a joggle, on the radial section of eccentric spiral cavity, the movement travel of rotor in bore of stator is the twice of rotor maximum eccentricity.

5. a kind of eccentric rotor volume fluctuation deformation plastifies feeding device according to claim 3, it is characterized in that, in described eccentric straight-line cavity, rotor eccentricity straightway and linear stator section are connected with a joggle, on the radial section of eccentric straight-line cavity, the movement travel of rotor in bore of stator is the twice of rotor maximum eccentricity.

6. a kind of eccentric rotor volume fluctuation deformation plastifies feeding device according to claim 1, it is characterized in that, described wobble component comprises universal joint, power transmission shaft and rotor connection, rotor connection is hinged by the first cross jaw and power transmission shaft, and power transmission shaft is by the second cross jaw and universal joint articulated.

7. a kind of eccentric rotor volume fluctuation deformation plastifies feeding device according to claim 1, it is characterized in that, the output of described stator is by the cylinder body of the external injection device of connector, and bore of stator communicates with the injection flow passage in cylinder body, is provided with plunger in injection flow passage.