A twin-screw method for processing new materials

Abstract

The application discloses a kind of double screw new material processing methods, belong to new material processing technical field.The method includes: S1 to raw material drying treatment;S2 dry raw materials and additives are mixed;S3 mixed material melt extrusion forms melt;S4 in melt extrusion process, the actual extrusion pressure and melt state of melt are monitored in real time, and according to both dynamic adjustment screw speed;S5 to melt filtration;S6 cooling and shaping.The application is by melt extrusion process with extrusion pressure as feedback signal, melt state as adjustment basis dynamic adjustment screw speed, overcomes the problem of response lag and insufficient precision caused by fixed screw speed or relying on artificial experience adjustment in traditional method, effectively suppresses the influence of pressure fluctuation on melt conveying stability, improves product size precision and internal structure uniformity, guarantees the stability and uniformity of product quality.

Description

Technical Field

[0001] This invention belongs to the field of new material processing technology, specifically relating to a twin-screw new material processing method applicable to various materials such as plastics, rubber, and composite materials. Background Technology

[0002] In the field of new materials processing, twin-screw extrusion technology, as a highly efficient and continuous processing technology, is widely used in the melt mixing and molding production of various new materials such as plastics, rubber, and composite materials. In a typical twin-screw extrusion process, the raw material is dried, mixed, and then fed into a twin-screw extruder. It is melt-extruded at a set temperature, and then filtered, cooled, and shaped to obtain the final product. This method has become one of the mainstream technologies in the field of new materials processing due to its advantages such as uniform mixing, short material residence time, and good self-cleaning performance.

[0003] In existing twin-screw extrusion processes, operators typically pre-set the screw speed of the twin-screw extruder based on material characteristics and production experience, and then manually adjust it intermittently at a fixed speed or at predetermined time intervals during production. However, due to the complexity and diversity of new material formulations, and the influence of factors such as raw material batches, moisture content, additive dispersion effects, and temperature fluctuations in different barrel zones on the melting behavior of the mixture, the melt extrusion pressure and melt state exhibit dynamic changes during actual production. When the screw speed is typically set to a fixed value or adjusted solely based on operator experience, it is impossible to respond precisely to real-time changes in the material's melt state and extrusion pressure. This results in low adjustment accuracy, strong reliance on operator experience, and difficulty in ensuring the stability and uniformity of product quality across different batches or even within the same batch at different time periods. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, this invention provides a novel twin-screw material processing method. By monitoring the melt extrusion pressure and melting state in real time and dynamically adjusting the screw speed, a closed-loop control with strong adaptability to the working conditions of the melt extrusion process is achieved, thereby improving the stability of the processing, reducing the difficulty of operation, and ensuring the consistency and reliability of product performance.

[0005] The technical solution adopted by this invention to solve its technical problem is as follows: A novel material processing method using twin-screw extruders includes the following steps: S1: Dry the raw materials to obtain dry raw materials that meet the moisture content requirements; S2: Mix the dried raw materials and additives in a preset ratio to obtain a mixture; S3: The mixture is fed into the barrel of a twin-screw extruder, and a set temperature is set on the barrel so that the barrel melts and extrudes the mixture at the set temperature to form a melt; S4: During the melt extrusion process, the actual extrusion pressure and melting state of the melt are monitored in real time, and the screw speed of the twin-screw extruder is dynamically adjusted according to the actual extrusion pressure and melting state. S5: Filter the melt to remove impurities; S6: Cool and solidify the filtered melt to obtain a new material product of the desired shape.

[0006] Furthermore, the drying process described in step S1 uses a hot air circulating drying oven, with the drying temperature controlled within the range of 80°C to 120°C and the drying time within the range of 2 hours to 4 hours; Drying efficiency is calculated using the following formula. : ; in, This refers to the drying time. The quality of the material before drying. P represents the mass of the dried material, and P represents the hot air power of the hot air circulating drying oven. Based on the calculated drying efficiency, adjust the drying time and / or the hot air power to maintain the drying efficiency within a preset target range; The drying temperature range of 80°C to 120°C and the drying time range of 2 hours to 4 hours constitute the parameter adjustment boundaries in the adjustment process.

[0007] Furthermore, the set temperature of the barrel mentioned in step S3 Calculated using the following formula: ; in, The melting point of the mixture. The temperature deviation is predetermined based on the viscosity of the mixture and the performance parameters of the twin-screw extruder; The set temperature The range is the melting point of the mixture. The temperature should be between 10°C and 50°C.

[0008] Furthermore, the screw speed n of the twin-screw extruder mentioned in step S4 is calculated using the following formula: ; in, α is the base speed of the current twin-screw extruder, α is the speed adjustment coefficient, and ΔP is the difference between the actual extrusion pressure and the target extrusion pressure. The value of the speed adjustment coefficient α is determined based on the melting state: when the melting state is determined to be fully melted, the value of the speed adjustment coefficient α increases; when the melting state is determined to be incompletely melted, the value of the speed adjustment coefficient α decreases.

[0009] Furthermore, it also includes a step for judging the degree of clogging of the melt filter used to filter the melt in step S5. When the degree of clogging exceeds a set threshold, a melt filter replacement or cleaning signal is triggered. The step for judging the degree of clogging is executed by the controller of the melt filter according to a set cycle.

[0010] Furthermore, the degree of blockage Determined based on the following formula: ; in, This is the current filtering cycle time. This is the initial filtering time. This is the preset maximum filtering time.

[0011] Furthermore, the cooling and shaping rate in step S6 is controlled between 5°C / s and 20°C / s; Cooling and setting rate Calculated using the following formula: ; in, The temperature difference between the extrusion temperature and the setting temperature of the material. For the corresponding cooldown time; Based on the calculated cooling and setting rate, the cooling time is adjusted so that the cooling and setting rate is maintained within the target setting range of 5°C / s to 20°C / s.

[0012] Furthermore, in the melt extrusion step S3, the filtration step S5, and the cooling and shaping step S6, a melt pressure monitoring step is performed simultaneously; the melt pressure monitoring step is implemented by pressure sensors respectively installed in each corresponding process step. When the actual melt pressure value collected by any pressure sensor exceeds the preset pressure range for this process step When the time is right, an alarm signal is triggered, and the difference between the target melt pressure value and the actual melt pressure value is used as the melt pressure adjustment amount.

[0013] Furthermore, it also includes step S7: using an automated control system to monitor and manage steps S1-S6, and calculating the control accuracy of the control system using the following formula. : ; in, Here, represents the pressure setpoint and actual pressure value for the i-th control point, respectively, and n is the total number of control points. The maximum value of the pressure setpoint at the control point; The calculated control accuracy The control precision is compared with a preset accuracy threshold. When the accuracy falls below the threshold, the automated control system and the actuators of each process step shall be debugged and / or maintained.

[0014] The beneficial effects of this invention include: By monitoring the actual extrusion pressure and melt state of the melt in real time during melt extrusion and dynamically adjusting the screw speed of the twin-screw extruder based on these two factors, the problem of response lag and insufficient precision caused by fixed screw speed or intermittent adjustment based on manual experience in existing technologies can be overcome. This method uses extrusion pressure as a feedback signal and melt state as the adjustment basis to construct a closed-loop control mechanism for the melt extrusion process. This allows the screw speed to adaptively adjust to follow fluctuations in material properties and changes in operating conditions, thereby effectively suppressing the impact of pressure fluctuations on melt conveying stability, improving the dimensional accuracy and internal structural uniformity of the product, and reducing reliance on operator experience, ensuring the stability and uniformity of product quality.

[0015] In the drying process, by calculating the drying efficiency and using it as a target to adjust the drying time and hot air power in a closed loop, while using the given range of drying temperature and time as adjustment boundaries, the energy waste or insufficient drying caused by fixed parameters in traditional drying processes can be avoided. This achieves energy-saving optimization of the drying process while ensuring the raw material moisture content meets standards. In the melt extrusion process, the temperature deviation is predetermined based on the material viscosity and extruder performance, ensuring that the set temperature matches the flow characteristics of different materials and the mixing capacity of the equipment. This avoids uneven melting or increased energy consumption caused by coarse temperature settings.

[0016] By quantifying the degree of clogging in the melt filter and performing judgments according to a set cycle, a replacement or cleaning signal can be automatically triggered when the clogging level exceeds a threshold, avoiding problems such as incomplete impurity removal or production interruption caused by filter clogging. By calculating the cooling and shaping rate in real time and adjusting the cooling time as the adjustment object, the cooling rate is always maintained within the target range of 5°C / s to 20°C / s, ensuring the accuracy of product shape and dimensional stability, and preventing deformation or residual internal stress caused by excessively fast or slow cooling.

[0017] In summary, this method, through precise control and synergistic optimization of multiple steps, supplemented by specific quantitative indicators for scientific limitation, solves the problems of crude raw material pretreatment control and lack of quantitative standards in traditional processes, arbitrary melting temperature setting and difficulty in matching material characteristics, lag in screw speed adjustment and inability to respond to pressure fluctuations, lack of monitoring of melt filtration and easy to cause impurity residue, and uncontrollable cooling and shaping rate, which affects product dimensional stability. Attached Figure Description

[0018] Figure 1 This is a flowchart of the overall method of the present invention. Detailed Implementation

[0019] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] In the description of this invention, it should be noted that the technical features involved in the different embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0021] This invention provides a novel twin-screw extrusion method for material processing, applicable to the melt mixing and molding production of various new materials such as plastics, rubber, and composite materials. This method achieves closed-loop control throughout the entire process, from raw material pretreatment to final product molding, through multi-step collaborative control and dynamic optimization, significantly improving processing efficiency, product purity, and performance stability. The following provides a detailed description of each step.

[0022] Example 1: This example provides a new material processing method using a twin-screw extruder, comprising the following steps performed sequentially: Step S1: Raw Material Pretreatment. The raw materials are dried to obtain dry materials that meet the required moisture content. Specifically, the raw materials to be processed (such as polymer resin particles, blends, or composite matrix) are placed in a hot air circulating drying oven for drying. The drying temperature is controlled within the range of 80°C to 120°C, and the drying time is within the range of 2 to 4 hours. The goal of the drying treatment is to remove moisture from the raw materials to a moisture content of no more than 0.5%, in order to avoid quality problems such as bubbles and degradation caused by the presence of moisture during subsequent melt processing.

[0023] To quantitatively evaluate the drying effect and achieve closed-loop optimization of the drying process, this step calculates the drying efficiency using the following formula: ; in, This refers to the drying time. The quality of the material before drying. P represents the mass of the dried material, and P represents the hot air power of the hot air circulating drying oven. Based on the calculated drying efficiency, adjust the drying time and / or hot air power to maintain the drying efficiency within the preset target range. The drying temperature range of 80°C to 120°C and the drying time range of 2 hours to 4 hours constitute the parameter adjustment boundaries during the adjustment process. The adjustment operation is carried out within these boundaries to ensure that the raw materials are not decomposed by high temperature or damaged by over-drying.

[0024] The purpose of this step is to overcome the problems of energy waste or insufficient drying caused by fixed parameters in traditional drying processes by quantitatively evaluating and adjusting drying efficiency, and to achieve energy-saving optimization of the drying process while ensuring that the moisture content of the raw materials meets the standards.

[0025] Step S2: Mixing. The dried raw materials processed in Step S1 are mixed with additives in a preset ratio to obtain a mixture. The additives include, but are not limited to, at least one of plasticizers, antioxidants, pigments, and fillers, and the specific types and amounts are determined according to the performance requirements of the target product.

[0026] In this step, the amount of additive added can be determined using the formula... Perform calculations, where Indicates the quality of additives. This represents the mass of the base raw materials, and k is a preset proportional coefficient based on the material properties. For example, for formulations requiring enhanced antioxidant properties, a larger k value can be set to increase the amount of antioxidant; for formulations requiring improved flowability, the proportional coefficient of the plasticizer can be adjusted. The mixing process can employ a high-speed mixer or a tumbling mixer to ensure uniform dispersion of each component, providing a homogeneous material base for subsequent melt extrusion. Step S3: Melt extrusion. The mixture obtained in step S2 is fed into the barrel of a twin-screw extruder. A set temperature is set in the barrel, and the mixture is melt-extruded at the set temperature to form a melt.

[0027] A twin-screw extruder has a twin-screw structure with co-rotating or counter-rotating screws. The material gradually melts and propels forward under the conveying, shearing, and mixing action of the screws. In this step, the set temperature of the barrel is calculated using the following formula: ; in, The melting point of the mixture. The temperature deviation is predetermined based on the viscosity of the mixture and the performance parameters of the twin-screw extruder; The set temperature The range is the melting point of the mixture. The temperature should be between 10°C and 50°C.

[0028] Example of how to determine the melt index (MI): When the melt index (MI) of the mixture is ≤ 5 g / 10 min (i.e., high viscosity material), because high viscosity material has poor flowability, a higher temperature is required to reduce the viscosity and facilitate melting and flow. The value is taken as 30°C to 50°C; when the melt index (MI) of the mixture is > 5 g / 10 min (i.e., low viscosity material), The values ​​are taken from 10°C to 30°C. In addition, the performance parameters of the twin-screw extruder must be considered: when the extruder's length-to-diameter ratio (L / D) ≥ 40 (i.e., it has strong mixing capacity), the material's residence time in the barrel is longer, and the shearing effect is stronger. Reduce the temperature by 5°C to 10°C based on the above; when the extruder's length-to-diameter ratio (L / D) is < 40 (i.e., the mixing capacity is relatively weak), Increase the temperature by 5°C to 10°C based on the above method. The temperature determined using the above method... This allows the set temperature to match the flow characteristics of different materials and the mixing capacity of the equipment, avoiding uneven melting or increased energy consumption caused by a rough temperature setting.

[0029] The purpose of this step is to ensure that the material is fully and uniformly melted in the barrel by optimizing the temperature deviation based on the material viscosity and equipment performance, so as to provide a homogeneous melt for subsequent filtration and cooling shaping.

[0030] Step S4: Dynamic speed control. During melt extrusion, the actual extrusion pressure and melt state of the melt are monitored in real time, and the screw speed of the twin-screw extruder is dynamically adjusted according to the actual extrusion pressure and melt state.

[0031] Specifically, melt pressure data is collected in real time using pressure sensors installed at the barrel outlet or on the melt delivery pipeline. In this step, the screw speed n of the twin-screw extruder is calculated using the following formula: ; in, α is the base speed of the current twin-screw extruder, α is the speed adjustment coefficient, and ΔP is the difference between the actual extrusion pressure and the target extrusion pressure. The value of the speed adjustment coefficient α is determined based on the molten state. The molten state can be determined in several ways, such as by the pressure fluctuation amplitude. When the pressure fluctuation amplitude is less than a preset threshold (e.g., ±0.5 MPa), it is considered fully molten; when the pressure fluctuation amplitude is greater than the preset threshold, it is considered insufficiently molten. Alternatively, it can be determined by the temperature difference between multiple points within the barrel. When the temperature difference between multiple points is less than ±2°C, it is considered fully molten; otherwise, it is considered insufficiently molten. When the molten state is determined to be fully molten, the speed adjustment coefficient α is set to a relatively large value (e.g., α = 5-10 rpm / MPa) to enhance the response sensitivity to pressure fluctuations, enabling the system to quickly suppress pressure fluctuations; when the molten state is determined to be insufficiently molten, the speed adjustment coefficient α is set to a relatively small value (e.g., α = 1-3 rpm / MPa) to reduce the speed adjustment amplitude. The purpose of this step is to use extrusion pressure as a feedback signal and molten state as an adjustment basis to build a closed-loop control mechanism for the melt extrusion process. This allows the screw speed to be adjusted in a timely manner to adapt to fluctuations in material properties and changes in operating conditions, thereby effectively suppressing the impact of pressure fluctuations on the stability of melt conveying and improving product consistency and reliability.

[0032] Step S5: Melt Filtration. The melt extruded in Step S4 is filtered online to remove any unmelted particles, gel particles, or foreign impurities that may be present, ensuring the purity of the product.

[0033] In this step, a melt filter (such as a plate filter, wick filter, or backwash filter) is used to continuously filter the melt. To avoid incomplete impurity removal or production interruption due to filter clogging, this method also includes a step to determine the degree of clogging of the melt filter. This determination step is automatically executed by the melt filter controller at a set cycle.

[0034] The degree of congestion is determined by the following formula: ; in, This is the current filtering cycle time. This refers to the initial filtration time (i.e., the time when the filter is first put into use or the starting time after being zeroed). This is the preset maximum filtration time (i.e., the theoretical lifespan of the filter or the experience-based replacement cycle).

[0035] When the degree of congestion When the set threshold (such as 80% or 90%) is exceeded, a melt filter replacement or cleaning signal is triggered, prompting the operator to handle the situation promptly.

[0036] The purpose of this step is to: avoid the problem of impurity residue caused by filter blockage through quantitative monitoring and intelligent early warning of the degree of blockage, and at the same time prevent the pressure surge and equipment damage caused by complete filter blockage, thus ensuring the continuity of production and the purity of products.

[0037] Step S6: Cooling and Shaping. The melt filtered in step S5 is rapidly cooled and shaped using a cooling device to obtain a new material product of the desired shape. Depending on the product shape, the cooling and shaping device may be a water bath, air cooling, cooling rollers, or a shaping mold.

[0038] In this step, the cooling and setting rate is controlled between 5°C / s and 20°C / s. The cooling and setting rate is calculated using the following formula: ; in, The temperature difference between the extrusion temperature and the setting temperature of the material. For the corresponding cooldown time; Based on the calculated cooling and setting rate, adjust the cooling time to keep the cooling and setting rate within the target range of 5°C / s to 20°C / s.

[0039] The purpose of this step is to ensure that the product obtains an accurate shape and stable dimensions during the shaping process by calculating and adjusting the cooling rate in real time, and to prevent problems such as deformation, residual internal stress or abnormal crystallinity caused by excessively fast or slow cooling.

[0040] Example 2: This example adds a multi-stage melt pressure monitoring step based on Example 1.

[0041] In the melt extrusion step S3, the filtration step S5, and the cooling and shaping step S6, a melt pressure monitoring step is performed simultaneously. Specifically, high-precision pressure sensors (accuracy not less than ±0.5MPa) are installed at the barrel outlet of the twin-screw extruder, the front and rear ends of the filter, and the inlet of the cooling and shaping device. Each pressure sensor collects melt pressure data at its corresponding location in real time and transmits the data to the automated control system in real time.

[0042] When the actual melt pressure value collected by any pressure sensor exceeds the preset pressure range for this process step When this occurs, the system automatically triggers an alarm signal, and uses the difference between the target melt pressure value and the actual melt pressure value as the melt pressure adjustment amount, i.e. , For pressure adjustment amount, This is the target value for melt pressure. This is the actual value of the melt pressure.

[0043] The calibration frequency of the pressure sensor is calculated using the following formula: ; in, For operation time, This represents the sensor drift rate.

[0044] This formula allows for the dynamic determination of the calibration cycle based on actual usage time and sensor drift characteristics, ensuring the accuracy and reliability of pressure monitoring data.

[0045] The purpose of this step is to enable coordinated monitoring and rapid response of the pressure in each process stage, including melt extrusion, filtration, and cooling and shaping. When any abnormal pressure occurs in any stage, the system can detect it in time and trigger the handling mechanism to prevent the problem from escalating and ensure the stable operation of the entire process.

[0046] Example 3: Based on Example 1 or Example 2, this example further adopts an automated control system to monitor and manage the entire process of steps S1 to S6, and quantitatively evaluates the control accuracy of the system.

[0047] The entire processing is centrally monitored and managed by an automated control system (such as a PLC control system, a DCS distributed control system, or an industrial computer control system). The system calculates the control accuracy of the control system using the following formula: ; in, Here, represents the pressure setpoint and actual pressure value for the i-th control point, respectively, and n is the total number of control points. The maximum value of the pressure setpoint at the control point; The calculated control accuracy (Dimensionless, expressed as a percentage) is compared with a preset accuracy threshold, and when the control accuracy... When the accuracy falls below the threshold, the system automatically triggers a debugging and maintenance signal, prompting operators to perform debugging and / or maintenance operations on the automated control system and the actuators of each process stage (such as heaters, cooling valves, variable frequency motors, filter actuators, etc.). Debugging and maintenance operations include, but are not limited to: calibrating pressure sensors in each process stage; checking and adjusting the screw speed control parameters of the twin-screw extruder; checking and adjusting the temperature control parameters of each heating zone; checking the degree of filter clogging and replacing or cleaning as needed; and checking the temperature control accuracy and cooling medium flow rate of the cooling and shaping device. These debugging and maintenance operations continue until the re-evaluated control accuracy meets the requirements.

[0048] The purpose of this step is to achieve objective evaluation and proactive maintenance of the overall system performance through quantitative assessment of control precision and threshold triggering mechanism, forming a complete technical path from single-point control to system-level closed-loop optimization, and further improving the intelligence level and operational reliability of the processing method.

[0049] The steps S1 to S6 (and S7) described above are not isolated operations, but rather an interconnected and synergistic overall technical solution. Raw material pretreatment S1 provides a raw material base with suitable moisture content for subsequent steps, avoiding quality defects caused by moisture. Mixing step S2 ensures uniform distribution of additives, creating conditions for stable melting behavior. Melt extrusion S3 provides an optimized temperature field, enabling the material to melt fully. Dynamic speed control S4 adjusts the screw speed in real time according to pressure and melting state, effectively suppressing the impact of pressure fluctuations on melt delivery. Melt filtration S5 removes impurities and is equipped with a blockage warning mechanism, ensuring product purity. Cooling and shaping S6 ensures product dimensional stability through rate closed-loop control. Furthermore, the evaluation and maintenance of the accuracy of multi-stage pressure monitoring and automated control systems ensure the long-term stable operation of the entire process. Through the organic combination and synergistic optimization of the above steps, this invention achieves scientific and intelligent closed-loop control of the entire process from raw materials to the final product, significantly improving the processing efficiency, product purity, and performance stability of the new material.

[0050] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A novel material processing method using a twin-screw extruder, characterized in that, Includes the following steps: S1: Dry the raw materials to obtain dry raw materials that meet the moisture content requirements; S2: Mix the dried raw materials and additives in a preset ratio to obtain a mixture; S3: The mixture is fed into the barrel of a twin-screw extruder, and a set temperature is set on the barrel so that the barrel melts and extrudes the mixture at the set temperature to form a melt; S4: During the melt extrusion process, the actual extrusion pressure and melting state of the melt are monitored in real time, and the screw speed of the twin-screw extruder is dynamically adjusted according to the actual extrusion pressure and melting state. S5: Filter the melt to remove impurities; S6: Cool and solidify the filtered melt to obtain a new material product of the desired shape.

2. The twin-screw new material processing method according to claim 1, characterized in that, The drying process described in step S1 uses a hot air circulating drying oven, with the drying temperature controlled within the range of 80°C to 120°C and the drying time within the range of 2 hours to 4 hours. Drying efficiency is calculated using the following formula. : ； in, This refers to the drying time. The quality of the material before drying. P represents the mass of the dried material, and P represents the hot air power of the hot air circulating drying oven. Based on the calculated drying efficiency, adjust the drying time and / or the hot air power to maintain the drying efficiency within a preset target range; The drying temperature range of 80°C to 120°C and the drying time range of 2 hours to 4 hours constitute the parameter adjustment boundaries in the adjustment process.

3. The twin-screw new material processing method according to claim 1, characterized in that, The set temperature of the barrel mentioned in step S3 Calculated using the following formula: ； in, The melting point of the mixture. The temperature deviation is predetermined based on the viscosity of the mixture and the performance parameters of the twin-screw extruder; The set temperature The range is the melting point of the mixture. The temperature should be between 10°C and 50°C.

4. The twin-screw new material processing method according to claim 1, characterized in that, The screw speed n of the twin-screw extruder in step S4 is calculated using the following formula: ； in, α is the base speed of the current twin-screw extruder, α is the speed adjustment coefficient, and ΔP is the difference between the actual extrusion pressure and the target extrusion pressure. The value of the speed adjustment coefficient α is determined based on the melting state: when the melting state is determined to be fully melted, the value of the speed adjustment coefficient α increases; when the melting state is determined to be incompletely melted, the value of the speed adjustment coefficient α decreases.

5. The twin-screw new material processing method according to claim 1, characterized in that, It also includes a step to determine the degree of clogging of the melt filter used to filter the melt in step S5. When the degree of clogging exceeds a set threshold, a melt filter replacement or cleaning signal is triggered. The step to determine the degree of clogging is executed by the controller of the melt filter according to a set cycle.

6. The twin-screw new material processing method according to claim 5, characterized in that, The degree of congestion Determined based on the following formula: ； in, This is the current filtering cycle time. This is the initial filtering time. This is the preset maximum filtering time.

7. The twin-screw new material processing method according to claim 1, characterized in that, The cooling and shaping rate in step S6 is controlled between 5°C / s and 20°C / s; Cooling and setting rate Calculated using the following formula: ； in, The temperature difference between the extrusion temperature and the setting temperature of the material. For the corresponding cooldown time; Based on the calculated cooling and setting rate, the cooling time is adjusted so that the cooling and setting rate is maintained within the target setting range of 5°C / s to 20°C / s.

8. The twin-screw new material processing method according to claim 1, characterized in that, In the melt extrusion step S3, the filtration step S5, and the cooling and shaping step S6, a melt pressure monitoring step is performed simultaneously; the melt pressure monitoring step is implemented by pressure sensors respectively installed in each corresponding process step; When the actual melt pressure value collected by any pressure sensor exceeds the preset pressure range for this process step When the time is right, an alarm signal is triggered, and the difference between the target melt pressure value and the actual melt pressure value is used as the melt pressure adjustment amount.

9. A twin-screw new material processing method according to any one of claims 1-8, characterized in that, The process also includes step S7: using an automated control system to monitor and manage steps S1-S6, and calculating the control accuracy of the control system using the following formula. : ； in, Here, represents the pressure setpoint and actual pressure value for the i-th control point, respectively, and n is the total number of control points. The maximum value of the pressure setpoint at the control point; The calculated control accuracy The control precision is compared with a preset accuracy threshold. When the accuracy falls below the threshold, the automated control system and the actuators of each process step shall be debugged and / or maintained.

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