CN207207019U - Synchronous plasticizing metered shot former based on eccentric rotor - Google Patents

Abstract

The utility model discloses a synchronous plasticizing metering injection molding device based on an eccentric rotor. A hydraulic motor includes an output shaft, a driving rotor and a driving stator. The driving rotor performs eccentric rotation in the driving stator. The output shaft is arranged in the middle of the driving rotor. The output terminal of the utility model is connected with the load rotor, and the drive rotor, the output shaft and the load rotor are arranged coaxially. The method is to set an eccentric drive rotor in the hydraulic motor, and use the drive rotor to control the rotational speed of the load rotor in the eccentric rotor plasticizing and conveying device, so that the material is plasticized and melted in the eccentric rotor plasticizing and conveying device, and quantitatively It is extruded into the cavity of the mold to realize the simultaneous completion of melt plasticization metering and injection mold filling. The utility model has a simple principle, but can effectively realize the synchronization of the plasticizing metering and the injection mold filling process of the injection molding machine, and saves the advance of the screw injection and the retraction of the plasticization in the traditional injection molding process.

Description

Synchronous Plasticizing Metering Injection Molding Equipment Based on Eccentric Rotor

technical field

The utility model relates to the technical field of polymer material injection molding, in particular to a synchronous plasticizing metering injection molding equipment based on an eccentric rotor.

Background technique

Injection molding is one of the main molding methods of plastic products, and it is an important part of the plastic processing industry and the plastic machinery industry. At present, the commonly used plastic injection molding machines mainly include plunger injection molding machines, reciprocating screw injection molding machines and screw plasticizing plunger injection molding machines. Injection molding is a batch-type molding method. Taking a reciprocating screw injection molding machine as an example, the principle of injection molding is that the screw rotates to transport the material forward and make it plasticized. The plasticized material is transported and stored in At the head of the screw, under the pressure of the molten material at the head, the screw retreats while rotating. When the volume of the melted material at the head of the screw reaches the required injection volume, the screw acts as a plunger under the action of an external force, with high pressure and high speed. The molten material at the head of the screw is injected into the cavity, and then the injection device maintains a certain pressure on the molten material to feed the molten material. When the pressure is kept in the cavity and the gate is closed, the product is cooled and shaped in the cavity, and the screw rotates at this time Step back to meter and plasticize the material in preparation for the next injection cycle. In the whole injection molding process, metering plasticization and injection mold filling are carried out step by step, that is, only one injection molding process can be completed in a period of time, and each process cannot be carried out at the same time, which greatly reduces the working efficiency of the injection molding machine and makes The entire injection cycle increases, and the energy consumption of the injection process increases. In addition, due to the receding of the screw when the material is plasticized, the effective length of the screw is shortened, the plasticizing effect of the material is poor, and a large amount of unplasticized material in the barrel participates in the linear motion during injection, and its frictional resistance becomes larger, which consumes more energy during the injection process. Further increase, the injection speed and injection position are difficult to control accurately, which will affect the quality and mechanical properties of the injection product, and limit the application range of the product.

For this reason, the invention patent application with the application number of 201410206552.8 discloses a method and device for eccentric rotor volume pulsation deformation plasticization transportation, and adopts a new method for polymer processing, so that polymer materials can be processed during the entire plasticization process. The process is dominated by volume pulsation deformation. Among them, the rolling effect of the eccentric rotor in the inner cavity of the stator during the rotation and constant speed reverse revolution is used to make the volume of the material between the eccentric rotor and the stator change periodically along the axial and radial directions of the stator alternately, so as to realize the volume of the material. Pulsating deformation plastic transport. The eccentric rotor extruder includes a stator and a rotor placed in the inner cavity of the stator. Since the eccentric rotor rolls in the inner cavity of the stator when it rotates and revolves in the opposite direction at a constant speed, the space volume between the eccentric rotor and the stator is along the axial direction and Periodic changes occur alternately in the radial direction, and the material between the stator and the rotor is subjected to volume pulsation deformation when it is periodically compressed and released, and the volume pulsation normalization including solid compaction, melt plasticization, mixing and kneading, and melt transportation is completed. Displacement plasticization transport process.

It can be seen that, in view of the problem that the traditional plunger injection machine and reciprocating screw injection machine cannot realize the synchronization of plasticizing metering and pulsating injection, if the volume pulsating positive displacement delivery characteristics of the eccentric rotor plasticizing transport device can also be used, the development An eccentric rotor synchronous plasticizing metering injection molding method and equipment with the advantages of good plasticizing and transporting effect, short molding cycle, less intermediate links, small volume of injection device, low energy consumption in the injection process and small motion inertia, etc. Material processing is of great significance.

Utility model content

The purpose of this utility model is to overcome the deficiencies of the prior art, and provide a synchronous plasticizing metering injection molding equipment based on eccentric rotor. .

The technical solution of the utility model is: a synchronous plasticizing metering injection molding equipment based on an eccentric rotor, including a connected eccentric device plasticizing conveying device and a hydraulic motor, and the eccentric device plasticizing conveying device includes a matched load stator and a load Rotor, the loaded rotor rotates eccentrically in the loaded stator;

The hydraulic motor includes an output shaft, a driving rotor and a driving stator. The driving rotor rotates eccentrically in the driving stator. The output shaft is arranged in the middle of the driving rotor. Shaft setup (ie the eccentricity of the output shaft with respect to the drive stator, the eccentricity of the drive rotor with respect to the drive stator, and the eccentricity of the load rotor with respect to the load stator are equal). Among them, the main function of the output shaft is to output speed and torque to the load rotor.

The driving rotor includes a first eccentric helical section and a second eccentric helical section connected, and the helical directions of the first eccentric helical section and the second eccentric helical section are opposite to offset part of the axial thrust exerted by the loaded rotor during operation .

The driving stator includes a coaxially arranged driving main stator and a driving auxiliary stator, the first eccentric helical section of the driving rotor is correspondingly arranged in the driving auxiliary stator, and the second eccentric helical section of the driving rotor is correspondingly arranged in the driving main stator.

The hydraulic motor also includes a motor casing, the motor casing is arranged on the outer periphery of the driving stator, the two ends of the motor casing are respectively provided with an input eccentric support seat and an output eccentric support seat, and the two ends of the output shaft are respectively connected to the input eccentric support seat and the output eccentric support seat. Support base connection. Among them, the motor casing acts as a seal for the entire hydraulic motor, and the input eccentric support seat and the output eccentric support seat support the output shaft. eccentric distance.

The motor casing is provided with an oil inlet and an oil outlet, and a first chamber and a second chamber are respectively formed between the two ends of the driving stator and the motor casing, and a number of rotor through holes are distributed on the driving rotor. The first chamber It communicates with the second chamber through the through holes of the rotors; a hydraulic oil flow channel is formed between the driving rotor and the driving stator, and a plurality of oil drain grooves are distributed on the outer periphery of the driving stator (there are several through holes distributed on the motor casing, and the main drive The oil discharge grooves on the stator and the driving auxiliary stator are connected through these one-to-one correspondence), the oil inlet is connected with the hydraulic oil flow channel, the two ends of the hydraulic oil flow channel are respectively connected with the first chamber and the second chamber, and each oil discharge groove has two The ends communicate with the first chamber and the second chamber respectively, and the middle parts of each oil discharge groove communicate with the oil outlet.

In the hydraulic motor, while the driving rotor rotates on its own axis, it also rotates in the opposite direction at a constant speed along the axis of the driving stator.

When the above-mentioned synchronous plasticizing metering injection molding equipment based on eccentric rotor is used, the driving principle of the hydraulic motor is: hydraulic oil enters the hydraulic oil flow channel from the oil inlet on the motor casing (that is, the gap between the eccentric drive rotor and the drive stator ), it flows along the hydraulic oil flow channel to both ends of the first chamber and the second chamber on both sides, during which the driving rotor is driven to rotate in the inner cavity of the driving stator, and at the same time, it performs a constant speed and reverse revolution , the drive rotor drives the output shaft to also rotate, so that the output shaft drives the load rotor in the plasticizing and conveying device of the eccentric device to rotate in the inner cavity of the load stator, and at the same time perform constant speed and reverse revolution. After the hydraulic oil passes through the first chamber and the second chamber, it flows into the oil discharge groove on the drive stator, and finally the oil flows out from the oil outlet.

The above equipment can realize a synchronous plasticizing metering injection molding method based on the eccentric rotor. By setting the eccentric driving rotor in the hydraulic motor, the driving rotor is used to control the speed of the load rotor in the plasticizing and conveying device of the eccentric rotor, so that the material is eccentric While plasticizing and melting in the rotor plasticizing and conveying device, it is quantitatively extruded into the cavity of the mold to realize the simultaneous completion of melting, plasticizing, metering and injection filling.

Among them, the synchronous plasticizing and metering injection molding process includes two stages of injection and compression. In the injection stage, when the mold is closed but not completely closed, the eccentric rotor plasticizing and conveying device melts and plasticizes the quantitative material at the same time. Rapidly extrude and inject into the mold cavity under lower pressure; the compression stage is that after the injection is completed, the mold is further closed, and a uniform compressive force is applied to the molten material in the cavity, so that the melt is further compacted.

In the eccentric rotor plasticizing and conveying device, when it is in the pressure maintaining process (that is, the above-mentioned compression stage), the driving rotor drives the load rotor to rotate at a low speed, and maintains the cavity pressure and performs feeding under the conditions of high pressure and low flow;

When the pressure is maintained until the gate in the cavity is closed, the material in the cavity is cooled and shaped, the load rotor stops rotating, the plasticizing and conveying device of the eccentric rotor stops to store energy, and the molten material in the plasticizing and conveying device of the eccentric rotor flows from the outside Installed heating device for heat preservation.

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

This synchronous plasticizing metering injection molding equipment based on eccentric rotor sets an eccentric drive rotor in the hydraulic motor, and uses the angular displacement of the drive rotor to control the angular displacement of the load rotor in the plasticizing and conveying device of the eccentric rotor, so that the material flows in the eccentric rotor While plasticizing and melting in the plasticizing and conveying device, it is quantitatively extruded into the cavity of the mold, realizing the synchronous completion of the plasticizing metering and injection filling process, eliminating the need for screw injection in the traditional injection molding process. And the plasticizing return action reduces the single injection molding cycle time, streamlines the device, shortens the molding cycle, reduces intermediate links, and greatly reduces energy consumption during the injection process.

The synchronous plasticizing metering injection molding equipment based on the eccentric rotor has a simple structure and is easy to disassemble, and can ensure the amount of material required for plasticizing metering injection and directly process the composite material system.

In this eccentric rotor-based synchronous plasticizing metering injection molding equipment, the eccentric rotor hydraulic motor is used as the drive and transmission, which can realize the output shaft rotating at the same speed and reverse revolution at the same time, which can directly replace the traditional hydraulic control system or motor and power. The distribution system has the advantages of compact structure, wide application range, large output torque, strong bearing capacity, and small rotational inertia. In addition to being applied to eccentric rotor extruders or injection molding machines, it can also be used in other machines that require rotation and revolution. load on.

Description of drawings

Fig. 1 is a schematic structural diagram of the synchronous plasticizing metering injection molding equipment based on the eccentric rotor.

Fig. 2 is a schematic diagram of the internal structure of the hydraulic motor in Fig. 1 .

Fig. 3 is a schematic diagram of the end face structure of the driving stator in Fig. 2 .

FIG. 4 is a schematic diagram of the principle of motion track of the output shaft in FIG. 2 .

In the above-mentioned figures, the components indicated by the labels are as follows: 1 is the mold, 2 is the load stator, 3 is the load rotor, 4 is the hydraulic motor, 5 is the motor casing, 6 is the driving auxiliary stator, 7 is the driving main stator, 8 is the Output shaft, 9 is the driving rotor, 10 is the output eccentric support seat, 11 is the input eccentric support seat, 12 is the oil discharge groove, 13 is the first chamber, 14 is the second chamber, 15 is the oil inlet, 16 is the outlet Oil port, 17 is a mold cavity, 18 is a hydraulic oil flow channel, and 19 is a through hole.

Detailed ways

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

Example

In this embodiment, a synchronous plasticizing metering injection molding device based on an eccentric rotor, as shown in Figure 1, includes a connected eccentric device plasticizing conveying device and a hydraulic motor 4, and the eccentric device plasticizing conveying device includes a matched load stator 2 and a load rotor 3, the load rotor rotates eccentrically in the load stator; the output end of the eccentric device plasticizing and conveying device is provided with a mold 1 with a cavity 17 inside the mold.

As shown in Figure 2, the hydraulic motor includes an output shaft 8, a driving rotor 9 and a driving stator, the driving rotor rotates eccentrically in the driving stator, the output shaft is arranged in the middle of the driving rotor, the output end of the output shaft is connected with the load rotor, and The rotor, the output shaft and the load rotor are arranged coaxially (that is, the eccentricity of the output shaft relative to the drive stator, the eccentricity of the drive rotor relative to the drive stator, and the eccentricity of the load rotor relative to the load stator are equal). Among them, the main function of the output shaft is to output speed and torque to the load rotor. The driving rotor includes a first eccentric helical segment and a second eccentric helical segment connected, and the helical directions of the first eccentric helical segment and the second eccentric helical segment are opposite to offset part of the axial thrust exerted by the loaded rotor during operation. The driving stator includes a coaxially arranged driving main stator 7 and a driving auxiliary stator 6, the first eccentric helical section of the driving rotor is correspondingly arranged in the driving auxiliary stator, and the second eccentric helical section of the driving rotor is correspondingly arranged in the driving main stator.

The hydraulic motor also includes a motor casing 5, the motor casing is arranged on the outer periphery of the driving stator, the two ends of the motor casing are respectively provided with an input eccentric support seat 11 and an output eccentric support seat 10, and the two ends of the output shaft are connected with the input eccentric support seat and the output eccentric support seat respectively. Eccentric bearing connection. Among them, the motor casing acts as a seal for the entire hydraulic motor, and the input eccentric support seat and the output eccentric support seat support the output shaft. eccentric distance. The motor casing is provided with an oil inlet 15 and an oil outlet 16. A first chamber 13 and a second chamber 14 are formed between the two ends of the driving stator and the motor casing respectively. There are several rotor through holes distributed on the driving rotor. The chamber and the second chamber are communicated through each rotor through hole; a hydraulic oil flow channel 18 is formed between the driving rotor and the driving stator, as shown in Figure 3, a plurality of oil discharge grooves 12 are distributed on the outer periphery of the driving stator (motor housing There are several through-holes 19 distributed on the top, and the oil discharge grooves on the driving main stator and the driving auxiliary stator are communicated one by one through these), the oil inlet is connected with the hydraulic oil flow channel, and the two ends of the hydraulic oil flow channel are respectively connected with the first chamber It communicates with the second chamber, the two ends of each oil discharge groove communicate with the first chamber and the second chamber respectively, and the middle part of each oil discharge groove communicates with the oil outlet.

In the hydraulic motor, while the driving rotor rotates along its own axis, it also performs constant-speed reverse revolution along the axis of the driving stator (as shown in Figure 4).

When the above-mentioned synchronous plasticizing metering injection molding equipment based on eccentric rotor is used, the driving principle of the hydraulic motor is: hydraulic oil enters the hydraulic oil flow channel from the oil inlet on the motor casing (that is, the gap between the eccentric drive rotor and the drive stator ), it flows along the hydraulic oil flow channel to both ends of the first chamber and the second chamber on both sides, during which the driving rotor is driven to rotate in the inner cavity of the driving stator, and at the same time, it performs a constant speed and reverse revolution , the drive rotor drives the output shaft to also rotate, so that the output shaft drives the load rotor in the plasticizing and conveying device of the eccentric device to rotate in the inner cavity of the load stator, and at the same time perform constant speed and reverse revolution. After the hydraulic oil passes through the first chamber and the second chamber, it flows into the oil discharge groove on the drive stator, and finally the oil flows out from the oil outlet.

A synchronous plasticizing metering injection molding method based on an eccentric rotor can be realized through the above equipment, specifically: by setting an eccentric driving rotor in the hydraulic motor, using the driving rotor to control the rotational speed of the load rotor in the eccentric rotor plasticizing transport device, While the material is plasticized and melted in the eccentric rotor plasticizing and conveying device, it is quantitatively extruded into the cavity of the mold to realize the simultaneous completion of melting, plasticizing, metering and injection filling.

Among them, the synchronous plasticizing and metering injection molding process includes two stages of injection and compression. In the injection stage, when the mold is closed but not completely closed, the eccentric rotor plasticizing and conveying device melts and plasticizes the quantitative material at the same time. Rapidly extrude and inject into the mold cavity under lower pressure; the compression stage is that after the injection is completed, the mold is further closed, and a uniform compressive force is applied to the molten material in the cavity, so that the melt is further compacted.

In the eccentric rotor plasticizing and conveying device, when it is in the pressure maintaining process (that is, the above-mentioned compression stage), the driving rotor drives the load rotor to rotate at a low speed, and maintains the cavity pressure and performs feeding under the conditions of high pressure and low flow;

When the pressure is maintained until the gate in the cavity is closed, the material in the cavity is cooled and shaped, the load rotor stops rotating, the plasticizing and conveying device of the eccentric rotor stops to store energy, and the molten material in the plasticizing and conveying device of the eccentric rotor flows from the outside Installed heating device for heat preservation.

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 (6)

1. Synchronous plasticizing metering injection molding equipment based on eccentric rotor, characterized in that it includes a connected eccentric device plasticizing conveying device and a hydraulic motor, the eccentric device plasticizing conveying device includes a matched load stator and a load rotor, and the load rotor Eccentric rotation in the loaded stator; The hydraulic motor includes an output shaft, a driving rotor and a driving stator. The driving rotor rotates eccentrically in the driving stator. The output shaft is arranged in the middle of the driving rotor. axis settings. 2. The synchronous plasticizing metering injection molding equipment based on eccentric rotor according to claim 1, characterized in that, the driving rotor comprises a first eccentric helical section and a second eccentric helical section connected, and the first eccentric helical section It is opposite to the helical direction of the second eccentric helical segment. 3. The synchronous plasticizing metering injection molding equipment based on eccentric rotor according to claim 2, characterized in that, the driving stator comprises a coaxially arranged driving main stator and a driving auxiliary stator, and the first eccentric helical segment of the driving rotor corresponds to It is arranged in the driving auxiliary stator, and the second eccentric spiral segment of the driving rotor is correspondingly arranged in the driving main stator. 4. The synchronous plasticizing metering injection molding equipment based on eccentric rotor according to claim 1, characterized in that, the hydraulic motor also includes a motor casing, the motor casing is arranged on the outer periphery of the driving stator, and the two ends of the motor casing are respectively provided with The input eccentric support seat and the output eccentric support seat are connected with the input eccentric support seat and the output eccentric support seat at both ends of the output shaft respectively. 5. The synchronous plasticizing metering injection molding equipment based on eccentric rotor according to claim 4, characterized in that, the motor casing is provided with an oil inlet and an oil outlet, and the two ends of the drive stator are respectively formed between the motor casing and the motor casing. The first chamber and the second chamber have a number of rotor through holes distributed on the driving rotor, and the first chamber and the second chamber are connected through the rotor through holes; the hydraulic oil flow channel is formed between the driving rotor and the driving stator , the outer circumference of the driving stator is distributed with a plurality of oil discharge grooves, the oil inlet is connected with the hydraulic oil flow channel, the two ends of the hydraulic oil flow channel are respectively connected with the first chamber and the second chamber, and the two ends of each oil discharge groove are respectively connected with the second chamber. The first chamber communicates with the second chamber, and the middle part of each oil discharge groove communicates with the oil outlet. 6. The synchronous plasticizing metering injection molding equipment based on eccentric rotor according to claim 1, characterized in that, in the hydraulic motor, while the driving rotor rotates along its own axis, it also performs constant speed reaction along the axis of the driving stator. to revolution.