Temperature control system for melt extrusion process

Abstract

The utility model discloses a temperature control system for a melt extrusion process, which comprises a screw extruder, a main control unit and a man-machine interaction screen, the screw extruder comprises at least three sub-temperature control areas, a temperature detection module and a heating module are respectively arranged in each sub-temperature control area, and the temperature control system further comprises the main control unit and the man-machine interaction screen, and the temperature detection module, the heating module and the man-machine interaction screen are respectively in signal connection with the main control unit. According to the utility model, the screw extruder is divided into at least three sub temperature control areas, the temperature detection module and the heating module are respectively arranged in each sub temperature control area, the temperature in the corresponding sub temperature control area is detected in real time through the temperature detection module, and the heating module is controlled by the main control unit to adjust the temperature; therefore, the temperature of each sub temperature control area is accurately controlled, and the spinning quality is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of temperature control technology, specifically relating to a temperature control system for melt extrusion processes. Background Technology

[0002] Specialty fibers are chemical fibers with unique physicochemical structures, properties, and applications, or with special functions. These fibers are mostly used in various fields such as industry, medicine, environmental protection, and cutting-edge science.

[0003] In the melt spinning process of specialty fibers, melt extrusion is one of the core processes. The melt extrusion process is usually divided into 3-6 independent temperature zones. By controlling the temperature in each zone, the polymer can be gradually melted, homogenized, and stably transported.

[0004] Therefore, in order to ensure the quality of spinning, precise temperature control in each temperature zone is particularly important. Utility Model Content

[0005] The purpose of this invention is to provide a temperature control system for melt extrusion processes to solve the problems mentioned in the background section. The temperature control system provided by this invention for melt extrusion processes has the characteristic of accurately controlling the temperature of each temperature zone, thus ensuring the quality of spinning.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a temperature control system for a melt extrusion process, comprising a screw extruder, the screw extruder comprising at least three sub-temperature control zones, each sub-temperature control zone being provided with a temperature detection module and a heating module, and further comprising a main control unit and a human-machine interface screen, wherein the temperature detection module, the heating module and the human-machine interface screen are respectively signal connected to the main control unit.

[0007] To ensure accurate temperature detection at multiple points within the temperature-controlled zone, the temperature detection module further includes several thermocouples arranged in a ring on the cavity wall of the temperature-controlled zone. The probes of the thermocouples are embedded in the lining of the cavity wall to a depth half the thickness of the lining, and thermally conductive silicone grease is used to fill the space between the probes and the lining.

[0008] To reduce the impact of the heating module on the thermocouple during operation, and to prevent high temperatures from causing aging and failure of the signal transmission line, thus ensuring the accuracy of the detection results, the portion of the thermocouple located outside the inner liner and the signal transmission line are further covered with a ceramic fiber insulation layer.

[0009] Furthermore, the main control unit includes a microcontroller, an analog-to-digital converter, a driver chip, and a communication module.

[0010] Furthermore, the heating module is a ceramic heating element assembly, which is connected to the main control unit via a relay.

[0011] To ensure the heating efficiency of the heating module and reduce energy consumption, the surface of the ceramic heating element assembly is further coated with a 50-100μm thick graphene thermally conductive coating, and the power density of the heating element is 3-5W / cm². 2 The spacing between adjacent heating elements is 1.2-1.5 times the width of the heating element.

[0012] In order to cool down the corresponding sub-temperature control zone when the temperature of the sub-temperature control zone is higher than the set threshold, and to ensure the accuracy of temperature control, a heat dissipation module is further included. The heat dissipation module includes cooling pipes surrounding the sub-temperature control zone and the cooling pipes are connected to an external coolant circulation system.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model divides the screw extruder into at least three sub-temperature control zones. Each sub-temperature control zone is equipped with a temperature detection module and a heating module. The temperature detection module detects the temperature in the corresponding sub-temperature control zone in real time, and the main control unit controls the heating module to adjust the temperature, thereby achieving precise control of the temperature of each sub-temperature control zone and ensuring the quality of spinning.

[0015] 2. The temperature detection module of this utility model includes several thermocouples, which are arranged in a ring on the cavity wall of the temperature control zone to detect the temperature at multiple points in the temperature control zone, ensuring the accuracy of temperature detection.

[0016] 3. The portion of the thermocouple located outside the inner liner and the signal transmission line of this utility model are covered with a ceramic fiber insulation layer, which reduces the impact of the heating module on the thermocouple during operation and avoids aging and failure of the signal transmission line due to high temperature, thus ensuring the accuracy of the detection results.

[0017] 4. The surface of the heating element of this ceramic heating element assembly is coated with a 50-100μm thick graphene thermally conductive coating, and the power density of the heating element is 3-5W / cm². 2 The spacing between adjacent heating elements is 1.2-1.5 times the width of the heating element to ensure the heating efficiency of the heating module and reduce energy consumption.

[0018] 5. When the temperature of the corresponding sub-temperature control zone is higher than the set threshold, the present invention uses a heat dissipation module to cool down the sub-temperature control zone, thereby ensuring the accuracy of temperature control. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the partitioning of this utility model.

[0020] Figure 2 This is a flowchart of the temperature control process of this utility model.

[0021] In the diagram: 1. Screw extruder; 2. Temperature detection module; 3. Heat dissipation module; 4. Heating module; 5. Main control unit; 6. Human-machine interface screen. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example 1

[0024] Please see Figures 1-2 This utility model provides the following technical solution: a temperature control system for melt extrusion process, including a screw extruder 1, which includes three sub-temperature control zones A, B and C. Each sub-temperature control zone is equipped with a temperature detection module 2 and a heating module 4. The system also includes a main control unit 5 and a human-machine interface screen 6. The temperature detection module 2, heating module 4 and human-machine interface screen 6 are connected to the main control unit 5 via signals. The heating module 4 is a ceramic heating element group, which is connected to the main control unit 5 via a relay. The main control unit 5 includes an STM32F407 microcontroller, an AD7705 analog-to-digital converter, an IR2104 driver chip and a communication module. The communication module uses an ESP8266 WiFi chip, which communicates with a cloud server to upload temperature data to a mobile terminal in real time and receive remote commands from the mobile terminal. The human-machine interface screen 6 is an 11-inch touch screen used for program setting, program control and temperature display.

[0025] By adopting the above technical solution, this utility model divides the screw extruder 1 into at least three sub-temperature control zones. Each sub-temperature control zone is equipped with a temperature detection module 2 and a heating module 4. The temperature detection module 2 detects the temperature in the corresponding sub-temperature control zone in real time, and the main control unit 5 controls the heating module 4 to adjust the temperature, thereby achieving precise control of the temperature of each sub-temperature control zone and ensuring the quality of spinning.

[0026] Specifically, the temperature detection module 2 includes several thermocouples arranged in a ring on the cavity wall of the temperature control zone. The probes of the thermocouples are embedded in the lining of the cavity wall of the temperature control zone to a depth of half the thickness of the lining, and thermally conductive silicone grease is filled between the probes of the thermocouples and the lining.

[0027] By adopting the above technical solution, the temperature in the temperature control zone is detected at multiple points to ensure the accuracy of temperature detection.

[0028] Example 2

[0029] The difference between this embodiment and embodiment 1 is that, specifically, the part of the thermocouple located outside the liner and the signal transmission line are covered with a ceramic fiber insulation layer.

[0030] By adopting the above technical solution, the impact of the heating module 4 on the thermocouple during operation is reduced, and the aging and failure of the signal transmission line caused by high temperature are avoided, thus ensuring the accuracy of the detection results.

[0031] Example 3

[0032] The difference between this embodiment and Embodiment 1 is that, specifically, the surface of the heating element in the ceramic heating element assembly is coated with a 50-100 μm thick graphene thermally conductive coating, and the power density of the heating element is 3-5 W / cm². 2 The spacing between adjacent heating elements is 1.2-1.5 times the width of the heating element.

[0033] By adopting the above technical solution, the heating efficiency of heating module 4 is guaranteed and energy consumption is reduced.

[0034] Example 4

[0035] The difference between this embodiment and embodiment 1 is that: specifically, it also includes a heat dissipation module 3, which includes a cooling pipe surrounding the temperature control zone, the cooling pipe being connected to an external coolant circulation system, and the circulation pump of the coolant circulation system being signal-connected to the main control unit 5.

[0036] By adopting the above technical solution, when the temperature of the corresponding sub-temperature control zone is higher than the set threshold, the heat dissipation module 3 will cool down the sub-temperature control zone to ensure the accuracy of temperature control.

[0037] In this invention, the thermocouple and the cooling pipe are respectively installed in the gaps of the heating elements.

[0038] In summary, this invention divides the screw extruder 1 into at least three sub-temperature control zones. Each sub-temperature control zone is equipped with a temperature detection module 2 and a heating module 4. The temperature detection module 2 detects the temperature in the corresponding sub-temperature control zone in real time, and the main control unit 5 controls the heating module 4 to adjust the temperature, thereby achieving precise temperature control of each sub-temperature control zone and ensuring the quality of spinning. The temperature detection module 2 includes several thermocouples arranged in a ring on the cavity wall of the sub-temperature control zone, allowing for multi-point temperature detection and ensuring accuracy. The thermocouples located outside the liner and the signal transmission lines are covered with a ceramic fiber insulation layer to reduce the impact of the heating module 4 on the thermocouples during operation and to prevent aging and failure of the signal transmission lines due to high temperatures, ensuring the accuracy of the detection results. The ceramic heating element assembly has a 50-100μm thick graphene thermally conductive coating sprayed on its surface, and the heating element power density is 3-5W / cm². 2 The spacing between adjacent heating elements is 1.2-1.5 times the width of the heating element, ensuring the heating efficiency of the heating module 4 and reducing energy consumption. When the temperature of the corresponding sub-temperature control zone exceeds a set threshold, the heat dissipation module 3 cools that sub-temperature control zone, ensuring accurate temperature control.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A temperature control system for a melt extrusion process, characterized in that: The device includes a screw extruder, which has at least three separate temperature control zones. Each separate temperature control zone is equipped with a temperature detection module and a heating module. It also includes a main control unit and a human-machine interface screen. The temperature detection module, the heating module, and the human-machine interface screen are all connected to the main control unit via signals.

2. The temperature control system for a melt extrusion process according to claim 1, characterized in that: The temperature detection module includes several thermocouples, which are arranged in a ring on the cavity wall of the temperature control zone.

3. A temperature control system for a melt extrusion process according to claim 2, characterized in that: The probe end of the thermocouple is embedded in the lining of the cavity wall of the temperature control zone, with an embedding depth of half the thickness of the lining, and thermally conductive silicone grease is filled between the probe end of the thermocouple and the lining.

4. A temperature control system for a melt extrusion process according to claim 3, characterized in that: The portion of the thermocouple located outside the liner and the signal transmission line are covered with a ceramic fiber insulation layer.

5. A temperature control system for a melt extrusion process according to claim 1, characterized in that: The main control unit includes a microcontroller, an analog-to-digital converter, a driver chip, and a communication module.

6. A temperature control system for a melt extrusion process according to claim 1, characterized in that: The heating module is a ceramic heating element assembly, which is connected to the main control unit via a relay.

7. A temperature control system for a melt extrusion process according to claim 6, characterized in that: The ceramic heating element assembly has a 50-100 μm thick graphene thermally conductive coating sprayed onto its heating element surface, and the heating element power density is 3-5 W / cm². 2 The spacing between adjacent heating elements is 1.2-1.5 times the width of the heating element.

8. A temperature control system for a melt extrusion process according to claim 1, characterized in that: It also includes a heat dissipation module, which includes cooling pipes surrounding the individual temperature control zones and connected to an external coolant circulation system.

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