Pelletizing extruder

Abstract

The utility model discloses a granulation extruding machine which comprises an extruding machine body, a frequency converter, a plurality of temperature control meters, a pressure meter, a programmable controller and an upper computer, the extruding machine body comprises a machine barrel, a screw rod and a driving motor in transmission connection with the screw rod, and the driving motor is used for driving the screw rod to rotate around the axis of the screw rod in the machine barrel; the machine barrel is sequentially divided into a plurality of heating areas from front to back; the frequency converter is electrically connected with the driving motor; a temperature control meter is installed in each heating area, and a PID temperature adjusting circuit is arranged in each temperature control meter; the pressure gauge is installed at the material storage port of the machine barrel, and a PID pressure adjusting circuit is arranged in the pressure gauge and electrically connected with the frequency converter; the programmable controller is in communication connection with the frequency converter, the plurality of temperature control meters and the pressure meter; the upper computer is in communication connection with the programmable controller; the extruder body is subjected to centralized control and remote monitoring, the temperature control meter and the pressure meter automatically control the temperature and the extrusion pressure in a closed-loop mode, and flexibility and practicability are improved.

Description

Technical Field

[0001] This application relates to the field of plastic production equipment technology, and in particular to a granulation extruder. Background Technology

[0002] In the field of plastic recycling, granulation process turns waste plastics into granules for recycling. The granules are widely used in various industries. Most extruders are currently controlled by PLCs. However, when the PLC is damaged, the extruder cannot be started and work is delayed. Summary of the Invention

[0003] In order to solve the above-mentioned technical problems, the purpose of this application is to provide a granulation extruder.

[0004] To achieve the above objectives, this application adopts the following technical solution: a granulation extruder, comprising:

[0005] The extruder body includes a barrel, a screw rotatably disposed inside the barrel, and a drive motor that is pulsatically connected to the screw. The drive motor is used to drive the screw to rotate around its own axis inside the barrel. The barrel is divided into multiple heating zones from front to back.

[0006] The frequency converter is electrically connected to the drive motor.

[0007] Multiple temperature controllers are installed on the barrel, with one temperature controller installed in each heating zone, and each temperature controller is equipped with a PID temperature regulation circuit.

[0008] A pressure gauge is installed at the discharge port of the barrel. The pressure gauge is equipped with a PID pressure regulation circuit, which is electrically connected to the frequency converter.

[0009] The programmable controller is communicatively connected to the frequency converter, the multiple temperature controllers, and the pressure gauges; and

[0010] The host computer is connected to the programmable controller.

[0011] In the above technical solution, it is further preferred that the barrel is also equipped with multiple temperature sensors, multiple heating devices and multiple cooling devices, and each heating zone is equipped with at least one temperature sensor, at least one heating device and at least one cooling device. The temperature sensor, heating device and cooling device of each heating zone are electrically connected to the PID temperature regulation circuit of the corresponding temperature controller.

[0012] In the above technical solution, a pressure sensor is further preferably installed on the barrel, and the pressure sensor is electrically connected to the PID pressure regulation circuit of the pressure gauge.

[0013] In the above technical solution, it is further preferred that the temperature controller is an RKC RS400 series temperature controller.

[0014] In the above technical solution, it is further preferred that the pressure gauge is an FB900 8N-4*4NN5 / A1-F801 pressure controller.

[0015] In the above technical solution, it is further preferred that the programmable controller is a Siemens S7-1200 PLC.

[0016] In the above technical solution, it is further preferred that the frequency converter is a Yaskawa GA700 series frequency converter.

[0017] In the above technical solution, a further preferred embodiment is that the programmable controller is communicatively connected to the frequency converter, the multiple temperature controllers, and the pressure gauges via a Profibus-DP fieldbus.

[0018] Compared with the prior art, this application achieves the following beneficial effects:

[0019] The host computer and programmable controller of this application can work together to centrally control and remotely monitor the extruder body. In addition, the temperature controller and pressure gauge can automatically control the temperature and extrusion pressure in a closed loop, unaffected by damage to the programmable controller and host computer, thus improving the flexibility and practicality of the granulation extruder. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a granulation extruder provided in an embodiment of this application.

[0021] The components include: 1. Extruder body; 11. Barrel; 111. Heating zone; 13. Drive motor; 2. Frequency converter; 3. Temperature controller; 4. Pressure gauge; 5. Programmable controller; 6. Host computer. Detailed Implementation

[0022] To illustrate the technical content, structural features, achieved objectives, and effects of the application in detail, the technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. In the following description, for illustrative purposes, numerous specific details are set forth to provide a detailed description of various exemplary embodiments or implementations of the invention. However, various exemplary embodiments may also be implemented without these specific details or in one or more equivalent arrangements. Furthermore, the various exemplary embodiments may differ, but are not necessarily exclusive. For example, the specific shape, structure, and characteristics of the exemplary embodiments may be used or implemented in another exemplary embodiment without departing from the inventive concept.

[0023] This application provides a granulation extruder for processing recycled waste plastics into granules for reuse. Figure 1 As shown, the granulation extruder includes: an extruder body 1, a frequency converter 2, multiple temperature controllers 3, a pressure gauge 4, a programmable controller 5, and a host computer 6.

[0024] The extruder body 1 includes a barrel 11, a screw (not shown in the figure) rotatably disposed in the barrel 11, and a drive motor 13 connected to the screw. The drive motor 13 is used to drive the screw to rotate around its own axis in the barrel 11. The barrel 11 is divided into multiple heating zones 111 from front to back.

[0025] The frequency converter 2 is electrically connected to the drive motor 13. The frequency converter 2 drives the drive motor 13 to work according to control commands, thereby adjusting the speed of the screw that is connected to the drive motor 13. In this embodiment, the frequency converter is a Yaskawa GA700 series frequency converter.

[0026] Multiple temperature controllers 3 are installed on the barrel 11. Each heating zone 111 is equipped with a temperature controller 3. Each temperature controller 3 is equipped with a PID temperature regulation circuit. Each temperature controller 3 is used to control the temperature of the corresponding heating zone 111, thereby stabilizing the temperature of the corresponding heating zone 111 within a suitable range.

[0027] Pressure gauge 4 is installed at the discharge port of barrel 11. Pressure gauge 4 is equipped with a PID pressure regulation circuit, which is electrically connected to frequency converter 2. Pressure gauge 4 can control frequency converter 2 to change the screw speed based on the extrusion pressure at the discharge port of barrel 11, thereby changing the extrusion pressure at the discharge port of barrel 11.

[0028] The programmable controller 5 is communicatively connected to the frequency converter 2, multiple temperature controllers 3, and pressure gauges 4. It can receive parameter information transmitted from the frequency converter 2, multiple temperature controllers 3, and pressure gauges 4, and can also issue control commands and transmit preset parameters to the frequency converter 2, multiple temperature controllers 3, and pressure gauges 4. In this embodiment, the programmable controller is a Siemens S7-1200 PLC, and it communicates with the frequency converter 2, multiple temperature controllers 3, and pressure gauges 4 via a Profibus-DP fieldbus, improving the accuracy of communication transmission.

[0029] The host computer 6 is connected to the RJ45 port of the programmable controller 5. The host computer 6 communicates remotely with the programmable controller 5 via the TCPIP communication protocol. The programmable controller 5 transmits the real-time operating parameters of the frequency converter 2, multiple temperature controllers 3, and pressure gauges 4 to the host computer 6 for display on the screen. This allows the operator to intuitively monitor the current operating parameters, thereby enabling remote monitoring of the extruder body 1 and triggering alarms when parameters are abnormal. The operator can input control programs and preset parameters into the programmable controller 5 through the host computer 6, which are then transmitted to the frequency converter 2, multiple temperature controllers 3, and pressure gauges 4 by the programmable controller 5 to achieve remote control.

[0030] The barrel 11 is also equipped with multiple temperature sensors (not shown in the figure), multiple heating devices (not shown in the figure), and multiple cooling devices (not shown in the figure). Each heating zone 111 is equipped with at least one temperature sensor, at least one heating device, and at least one cooling device. The temperature sensor, heating device, and cooling device of each heating zone 111 are electrically connected to the PID temperature regulation circuit of the corresponding temperature controller 3. In this embodiment, the temperature controller is an RKC RS400 series temperature controller.

[0031] A pressure sensor (not shown in the figure) is also installed on the barrel 11, and the pressure sensor is electrically connected to the PID pressure regulation circuit of the pressure gauge 4. In this embodiment, the pressure gauge is an FB900 8N-4*4NN5 / A1-F801 pressure controller.

[0032] Each temperature controller 3 and pressure gauge 4 is pre-loaded with a preset temperature and pressure via a programmable controller 5. These preset temperatures and pressures are the working parameters that best suit the material currently being produced by the extruder body 1. Under these working parameters, the material can be efficiently and fully melted and plasticized within the extruder body 1.

[0033] Within each heating zone 111, a temperature sensor detects the temperature within that zone and transmits the detection result to the corresponding temperature controller 3. The temperature controller 3 has a dial that displays the currently detected real-time temperature and transmits the real-time temperature to the programmable controller 5. The temperature controller 3 compares the real-time temperature with a preset temperature, and the PID temperature regulation circuit controls the heating and cooling devices to operate based on the comparison result until the real-time temperature of the current heating zone 111 stabilizes within a reasonable range of the preset temperature difference.

[0034] The pressure sensor transmits the detected extrusion pressure to the pressure gauge 4, which has a dial that directly displays the current real-time pressure and transmits the real-time pressure data to the programmable controller 5. The pressure gauge 4 compares the real-time pressure with the preset pressure. Based on the comparison result, the PID pressure regulation circuit controls the frequency converter 2 to adjust the voltage supplied to the drive motor 13, thereby changing the screw speed. When the screw speed changes, the extrusion pressure at the discharge port also changes. The PID pressure regulation circuit controls the frequency converter 2 to change the screw speed until the real-time pressure stabilizes within a reasonable range of the preset pressure.

[0035] The programmable controller 5 transmits the real-time temperature data from multiple temperature controllers 3 and the real-time pressure data from pressure gauges 4 to the host computer 6, where the data is displayed on the screen, allowing operators to monitor the operation of the extruder body 1 in real time. When the programmable controller 5 and the host computer 6 malfunction, the temperature controllers 3 and pressure gauges 4 automatically implement closed-loop control of the temperature and extrusion pressure, ensuring the extruder body 1 continues to operate normally, unaffected by the malfunction of the programmable controller 5 and the host computer 6.

[0036] The host computer and programmable controller of this application can work together to centrally control and remotely monitor the extruder body. In addition, the temperature controller and pressure gauge can automatically control the temperature and extrusion pressure in a closed loop, unaffected by damage to the programmable controller and host computer, thus improving the flexibility and practicality of the granulation extruder.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this application. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this application. Various changes and modifications can be made without departing from the spirit and scope of this application. The scope of protection claimed by this application is defined by the appended claims, specification, and their equivalents.

Claims

1. A granulation extruder, characterized in that, include: The extruder body includes a barrel, a screw rotatably disposed inside the barrel, and a drive motor that is pulsatically connected to the screw. The drive motor is used to drive the screw to rotate around its own axis inside the barrel. The barrel is divided into multiple heating zones from front to back. The frequency converter is electrically connected to the drive motor. Multiple temperature controllers are installed on the barrel, with one temperature controller installed in each heating zone, and each temperature controller is equipped with a PID temperature regulation circuit. A pressure gauge is installed at the discharge port of the barrel. The pressure gauge is equipped with a PID pressure regulation circuit, which is electrically connected to the frequency converter. The programmable controller is communicatively connected to the frequency converter, the multiple temperature controllers, and the pressure gauges; and The host computer is connected to the programmable controller.

2. The granulation extruder according to claim 1, characterized in that, The barrel is also equipped with multiple temperature sensors, multiple heating devices, and multiple cooling devices. Each heating zone is equipped with at least one temperature sensor, at least one heating device, and at least one cooling device. The temperature sensor, heating device, and cooling device of each heating zone are electrically connected to the PID temperature regulation circuit of the corresponding temperature controller.

3. The granulation extruder according to claim 1, characterized in that, The barrel is also equipped with a pressure sensor, which is electrically connected to the PID pressure regulation circuit of the pressure gauge.

4. The granulation extruder according to claim 2, characterized in that, The temperature controller mentioned is an RKC RS400 series temperature controller.

5. The granulation extruder according to claim 4, characterized in that, The pressure gauge is an FB900 8N-4*4NN5 / A1-F801 pressure controller.

6. The granulation extruder according to claim 1, characterized in that, The programmable controller is a Siemens S7-1200 PLC.

7. The granulation extruder according to claim 1, characterized in that, The inverter mentioned is a Yaskawa GA700 series inverter.

8. The granulation extruder according to claim 1, characterized in that, The programmable controller is connected to the frequency converter, the multiple temperature controllers and the pressure gauge via a Profibus-DP fieldbus.

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