Movable modular melt spinning research system and method

Abstract

The invention discloses a movable modular melt spinning research system and method, and belongs to the technical field of fiber spinning. The system comprises a melt spinning module, a cooling module and a stretching and winding module. The melt spinning module comprises a screw extruder, a metering pump transmission device and a spinning assembly which are connected in sequence; the cooling module comprises a static pressure chamber, a side blowing device and an oiling device; a fan is arranged in the static pressure chamber, and air generated by the fan is connected to the lateral blowing device through a pipeline; and the stretching and winding module is used for drafting and winding the fibers cooled by the cooling module. According to the system, key functions such as melt spinning, cooling and stretching and winding are integrated into independent modules, and modularization and mobility of the system are achieved. Compared with the prior art, various parameters in the fiber forming process can be monitored in real time in a larger spatial scale, the curing process from a high polymer melt to nascent fibers is analyzed more comprehensively, the fiber production process is optimized, and the fiber performance is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of fiber spinning and relates to a movable modular melt spinning research system and method. Background Art

[0002] Melt spinning is a fiber forming method that uses a polymer melt that can melt without significant degradation as raw material and is produced by a melt spinning machine. After the polymer is heated to a molten state in a screw extruder, it is pressurized by a spinning metering pump and extruded through the capillaries of the spinneret. The extruded liquid polymer fluid solidifies by heat exchange with the cooling medium and is drawn into filaments by a high-speed winding device located below the spinneret hole to form nascent fibers. The drawing speed of the winding device is very high and is determined by the type of polymer and its rheological properties. The nascent fibers are subsequently processed into fibers. The main features of the melt spinning machine are that it does not require any other solvents and precipitants, has a high winding speed, a large drawing ratio, and can be adjusted over a large range. It has a compact structure, a short process flow, and a high yield and output. Therefore, it is widely used in industrial fiber production.

[0003] During the entire melt spinning process, for different polymer raw materials, the operating parameters of all components need to cooperate with each other to complete the fiber production. Polymer raw materials often have a "viscoelastic memory effect", that is, the working parameters of all components involved in fiber production will affect the properties of the final fiber. At the same time, during the melt spinning process, many dynamic and thermodynamic physical changes will occur from the ejection of the polymer fluid from the spinneret to the end of the solidification process, which will directly affect the polymer orientation and the crystallization process induced by the orientation, and will have a decisive influence on the performance of the fiber. Therefore, it is of great value to study the influence of the parameters of the spinning machine components on the fiber structure.

[0004] In recent years, various melt spinning production processes have been continuously innovated, and the structure of melt spinning machines has also been continuously improved, including the optimization of components and the improvement of spatial dimensions. However, the integrated melt spinning research platform is designed based on the old spinning machine, which makes it difficult to replace specific components and modify spatial dimensions, and it is also difficult to study the specific impact of corresponding improvements on the production process. Therefore, it is urgent to design a machine that is easy to improve the spinning machine, can directly study the relationship between the operating parameters of specific components and fiber parameters, and adapt to various new melt spinning machines to expand the research scope of the experimental platform. Summary of the invention

[0005] The purpose of the present invention is to provide a movable modular melt spinning research system and method to solve the technical problems in the prior art that it is difficult to achieve specific component replacement and spatial dimension modification on the melt spinning research platform, and it is difficult to independently study the impact of corresponding improvements on the production process.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: In a first aspect, the present invention provides a movable modular melt spinning research system, comprising: A melt spinning module, the melt spinning module comprises a screw extruder, a metering pump transmission device and a spinning assembly connected in sequence; a sealed hopper is installed at the feed inlet of the screw extruder; the spinning raw material enters the screw extruder from the sealed hopper, and the primary fiber is finally generated by the spinning assembly; the spinning assembly is connected to a cooling module; A cooling module, the cooling module comprising a static pressure chamber, a side blowing device and an oiling device; a fan is arranged in the static pressure chamber, the wind generated by the fan is connected to the side blowing device through a pipeline, and the side blowing device is used to cool and blow air on the nascent fibers; the oiling device is located on one side of the side blowing device and is used to oil the nascent fibers; The stretching and winding module is used to stretch and wind the fibers after being cooled by the cooling module.

[0007] Furthermore, the stretching and winding module comprises a hot roller and a winding device; the hot roller is used to stretch the fiber cooled by the cooling module to the winding device.

[0008] Furthermore, the melt spinning module also includes a lifting platform, which is provided with rollers and brake components; the sealing hopper, screw extruder, metering pump transmission device and spinning assembly are all fixed on the lifting platform.

[0009] Furthermore, a water jacket device is provided at the feed inlet of the screw extruder.

[0010] Furthermore, the outer sleeve of the screw component of the screw extruder is provided with a screw heat insulation cover.

[0011] Furthermore, the fan in the static pressure chamber is also connected to a water chiller.

[0012] Furthermore, the fan is a centrifugal fan.

[0013] Furthermore, a filter assembly is installed in the side-blowing device for filtering the wind generated by the fan in the static pressure chamber.

[0014] Furthermore, the oiling method of the oiling device is oiling by tanker.

[0015] In a second aspect, the present invention provides a movable modular melt spinning research method, based on the above-mentioned movable modular melt spinning system, comprising the following steps: First, heat the screw extruder to 50°C, keep it warm for 10 minutes, and then heat it up in steps of 30°C until the temperature reaches the preset spinning process temperature; The spinning raw materials are added into the screw extruder from the sealed hopper, and then accurately metered by the metering pump transmission device into the spinning assembly, and the raw fibers are obtained by the spinning assembly. The fan in the static pressure chamber generates cold air and sends it to the side blowing device, through which the nascent fibers are blown and cooled; the cooled fibers are wound up by the stretching and winding module to complete the fiber preparation; and various parameters of the fiber forming process are monitored in real time during the fiber preparation process.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The invention discloses a movable modular melt spinning research system and method. The screw extruder, metering pump transmission device and spinning assembly in the melt spinning module are connected in sequence to form an efficient and stable melt spinning process. The design of the sealed hopper ensures the cleanliness and stability of the spinning raw materials, and effectively avoids the contamination and leakage of the raw materials during the feeding process. This not only improves the quality of the nascent fiber, but also provides a reliable raw material basis for subsequent research. The cooling module uses the fan and side blowing device in the static pressure chamber to evenly and efficiently cool and blow the nascent fiber, ensuring the rapid cooling and shaping of the fiber. At the same time, the setting of the oiling device further improves the lubricity and anti-friction performance of the fiber, providing strong support for the subsequent stretching and winding process. This combination of cooling and oiling treatment not only improves the quality of the finished fiber, but also enhances the overall performance of the system. The system of the present invention realizes the modularity and mobility of the system by integrating key functions such as melt spinning, cooling and stretching and winding into independent modules. This design not only facilitates the assembly, disassembly and transportation of the system, but also greatly improves the flexibility and efficiency of the research. Researchers can quickly adjust or replace the corresponding modules according to specific research needs, thus greatly shortening the research cycle. Compared with general measurement devices, it can monitor more parameters of the fiber forming process in real time within a larger spatial scale, and more comprehensively analyze the solidification process from polymer melt to nascent fiber, thereby optimizing the fiber production process and improving fiber performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a schematic diagram of the overall structure of the system of the present invention; Figure 2 It is a schematic structural diagram of the melt spinning module of the present invention; Figure 3 It is a structural schematic diagram of the cooling module of the present invention; Figure 4 It is a structural schematic diagram of the stretching and winding module of the present invention.

[0019] Among them: 1-melt spinning module; 2-cooling module; 3-stretching and winding module; 101-screw extruder; 102-metering pump transmission device; 103-spinning assembly; 104-lifting platform; 105-sealed hopper; 201-static pressure chamber; 202-side blowing device; 203-oiling device; 301-hot roller; 302-winding device; 303-filament separation rotor. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0023] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0024] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0025] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] The present invention is further described in detail below in conjunction with the accompanying drawings: See also Figure 1 The embodiment of the present invention discloses a movable modular melt spinning research system, including a melt spinning module 1, a cooling module 2 and a stretching and winding module 3; on the premise of retaining the original melt spinning fiber production function, the originally integrated melt spinning machine is divided into multiple movable systems to achieve the purpose of directly studying the relationship between the operating parameters of specific components and the fiber parameters. The specific structure is as follows: See also Figure 2 The melt spinning module 1 includes a screw extruder 101, a metering pump transmission device 102 and a spinning assembly 103 connected in sequence; a sealed hopper 105 is installed at the feed inlet of the screw extruder 101; the spinning raw material enters the screw extruder 101 from the sealed hopper 105, and finally the nascent fiber is generated by the spinning assembly 103, and then the nascent fiber is blown and cooled by the cooling module 2; see Figure 3 The cooling module 2 includes a static pressure chamber 201, a side blowing device 202 and an oiling device 203; a fan is arranged in the static pressure chamber 201, and the wind generated by the fan is connected to the side blowing device 202 through a pipeline, and the side blowing device 202 is used to cool and blow air to the spun fibers; the oiling device 203 is located on one side of the side blowing device 202, and is used to oil the spun fibers, further cool and protect the spun fibers; the stretching and winding module 3 is used to stretch and wind the fibers after being cooled by the cooling module 2.

[0027] In a possible embodiment of the present invention, see Figure 4 The stretching and winding module 3 includes a hot roller 301 and a winding device 302; the hot roller 301 is used to stretch the fiber cooled by the cooling module 2 to the winding device 302, and a plurality of hot rollers 301 are provided, which is of great significance to enhancing the fiber performance.

[0028] In a feasible embodiment of the present invention, the melt spinning module 1 also includes a lifting platform 104, which is provided with rollers and brake components; the sealed hopper 105, the screw extruder 101, the metering pump transmission device 102 and the spinning assembly 103 are all fixed on the lifting platform 104.

[0029] In a feasible embodiment of the present invention, a water jacket device is also provided at the feed port of the screw extruder 101, which can perform heat exchange on the material through the water in the water jacket and can also protect the feed port; the screw component of the screw extruder 101 is outer-coated with a screw insulation cover.

[0030] In a feasible embodiment of the present invention, the fan in the static pressure chamber 201 is also connected to a chiller for refrigeration, thereby generating cold air; the fan can preferably be a centrifugal fan; a filter component is installed in the side blowing device 202 for filtering the wind generated by the fan in the static pressure chamber 201.

[0031] The embodiment of the present invention discloses a movable modular melt spinning research method, based on the above-mentioned movable modular melt spinning system, comprising the following steps: S1, firstly heat the screw extruder 101 to 50°C, then keep the temperature for 10 minutes, and then heat it up in steps of 30°C until the temperature reaches the preset spinning process temperature; S2, adding the spinning raw material from the sealed hopper 105 into the screw extruder 101, and then entering the spinning assembly 103 after being accurately metered by the metering pump transmission device 102, and the spinning assembly 103 is used to discharge the spinning material to obtain the primary fiber; S3, the fan in the static pressure chamber 201 generates cold air and sends it to the side blowing device 202, and the nascent fibers are blown and cooled by the side blowing device 202; the cooled fibers are wound up by the stretching and winding module 3 to complete the fiber preparation; and various parameters of the fiber forming process are monitored in real time during the fiber preparation process.

[0032] The embodiment of the present invention realizes the modularity and mobility of the system by integrating key functions such as melt spinning, cooling, and stretching and winding into independent modules. This design not only facilitates the assembly, disassembly, and transportation of the system, but also greatly improves the flexibility and efficiency of the research. Researchers can quickly adjust or replace corresponding modules according to specific research needs, thereby greatly shortening the research cycle. Compared with general measuring devices, it can monitor more parameters of the fiber forming process in real time within a larger spatial scale, and more comprehensively analyze the solidification process from polymer melt to nascent fiber, thereby optimizing the fiber production process and improving fiber performance.

[0033] Example: The embodiment of the present invention provides a movable modular melt spinning system, comprising a melt spinning module 1, a cooling module 2 and a stretching and winding module 3; The melt spinning module 1 mainly includes a sealed hopper, a screw extruder 101, a metering pump transmission device 102 and a spinning assembly 103; the spinning raw material is added to the screw extruder 101 from the sealed hopper, and the sealed hopper material is stainless steel with a maximum capacity of 2kg. The screw component in the screw extruder 101 is a core component, and the screw material is 38CrMoAlA, with a diameter of 20mm and an aspect ratio of 28: 1; the screw has heating and rotating feeding functions, and the heating form is stainless steel ceramic heating, the heating power is 6kW, and 3-zone heating is adopted, and the heating temperature range is room temperature~350℃; it is driven by a cycloidal pinwheel reducer with a driving power of 3kW; the screw control mode is AC variable frequency speed regulation pressure closed-loop control, using 85-265V, 50Hz AC. The screw extruder 101 also includes a feed inlet water jacket device, a screw center frame, and a screw insulation cover. The screw insulation cover is set outside the screw component and is formed by a stainless steel mirror plate. The melt is extruded from the screw extruder 101 and enters the metering pump transmission device 102. The metering pump transmission device 102 is a device for realizing precise metering of the melt; the metering pump is in the form of a precision gear stack pump, made of Cr12MoV, with specifications of 1×0.3cc / rev and 1×1.2cc / rev, an operating temperature of 0~350℃, an operating speed of 5~40rpm, and a maximum pressure difference of 35Mpa. After passing through the metering pump transmission device 102, the melt enters the spinning assembly 103, which is used for the final filtration of the melt, and after the melt is evenly mixed, it is distributed to the spinneret holes on each spinneret to form a uniform melt stream. The spinning assembly 103 is bottom-mounted, made of 2Cr13 (nitrided), high-pressure self-sealing, and contains a shell and a sand cavity. The spinneret is the core component of the spinning assembly, which is used to transform the polymer melt into a stream with a specific cross-section through micropores, which is called primary fiber. This instrument uses multiple sets of spinnerets, all with a diameter of 64mm, made of SUS630, with various hole numbers and aperture settings. The entire system is fixed on a vertical electric lifting platform 104 (with brakes), which is welded by profiles. The device can be assembled by steel wire, guide wheel, and steel wire winding machine to realize the lifting of the platform. The maximum travel of the lift is 3m, the load is 260kg, and the power is 1.8kW.

[0034] The cooling module 2 works in coordination with the melt spinning module 1, and uses air blowing refrigeration to cool the nascent fibers extruded from the spinning assembly. It mainly includes a static pressure chamber 201, a side blowing device 202, and an oiling device 203. The static pressure chamber 201 uses an NWS-3AC chiller to maintain a constant air temperature and a DF5 low-noise centrifugal fan to provide side blowing cold air. The water chiller has a specification of 3 horsepower, a cooling capacity of 8.54kW, 7344cal / h, a compressor power of 2.75kW, and a centrifugal fan power of 550W; the side blowing system is used to cool the nascent fibers, with a size of 1200mm*250mm, and includes horizontal filtration, honeycomb panels, a combined stainless steel mesh, and an air volume adjustment device. The process speed is converted into a frequency input to the frequency converter, which controls the fan speed of the static pressure chamber 201 and extracts the outdoor wind of the static pressure chamber 201. The cooled static pressure chamber 201 air is transported by the fan through the fan exhaust pipe and damper box to control the air volume and then sent to the nascent fiber for cooling through horizontal filtration and vertical filtration damping. The oiling device 203 is used to further cool and protect the nascent fiber. The oiling method is oiling by oil tanker. The oil roller specification is φ150x100mm. The roller surface is sprayed with ceramic. The ceramic coating thickness is 0.1~0.2mm and the surface roughness of the ceramic coating is 1.6~3.2. It uses a gear reducer + three-phase high-efficiency motor, AC frequency conversion speed control, reduction ratio 1:36, including stainless steel oil tank and pipelines. Its wind speed and air volume are controlled by fan frequency conversion and damper valve. Its temperature is controlled by the chiller.

[0035] The stretching and winding module 3 mainly includes three groups of hot rollers 301 and a winding device 302; the hot rollers 301 are used for subsequent hot stretching of the fibers, which is of great significance for enhancing the performance of the fibers. The specifications are φ100×100mm, the surface is hard chrome-plated and mirror-polished, the surface roughness is 0.8, the temperature range is room temperature~180℃, the temperature measuring device pt100 and the temperature control module are used to control the screw temperature, the maximum mechanical speed is 1200m / min, the power supply uses 85-265V, 50Hz AC, and each hot roller 301 is equipped with a wire-splitting rotor 303, the wire-splitting rotor 303 has a specification of φ22*80mm, is sandblasted and chrome-plated, and has a surface roughness of 1.6-3.2. The winding device 302 is used for winding the fibers after heat drawing. The winding device 302 comprises two winding heads, the bobbin size is φ94*φ108*115mm, the maximum mechanical speed is 1200m / min, the traverse power is 120W, and the friction roller power is 550W.

[0036] The working process of this embodiment is as follows: After checking that all components are safe and normal, input the spinning-related process parameters and make all preparations before starting (the discharge temperature is slightly higher than the spinning temperature by 6~10℃). First, start the chiller and then open the cooling water pipeline of the water jacket of the screw feed port. Before heating, check whether all instruments and electrical equipment are normal. After normal, start heating. The temperature is raised in a step-by-step manner. At the beginning, the temperature is raised to 50℃. When the temperature reaches 50℃, keep it warm for 10 minutes, and then raise the temperature by 30℃ as a step (keep it warm for 10 minutes) to the spinning process temperature. When the spinning process temperature is reached, all the sealing bolts are tightened again and the temperature is kept warm for 1 hour. After that, discharge the material, first drive the screw, and then slowly add the slices to the feed port of the screw extruder 101 through the sealing hopper 105, observe the color of the melt flowing out, and stop feeding the feed port when the color is normal. When the melt in the manual screw is emptied, stop the screw. Remove the metering pump seat discharge plate, install the preheated metering pump, and rotate the metering pump with the transmission rod to see if it can rotate. Reinstall the metering pump transmission device 102 on the transmission rod, and connect the metering pump (the installation screws need to be coated with high-temperature grease). After keeping warm for a certain period of time, start the metering pump first, then start the rod extruder, resume feeding, and when it is confirmed that the metering pump discharges normally, turn off the screw and metering pump. After keeping warm for 2 hours, you can carry out spinneret discharge, start the metering pump and screw in sequence, and when the spinneret is normal, you can cast the wire to winding. Heat the three hot rollers to the hot stretching temperature, input the speed of each roller according to the stretching multiple, and start the hot roller system. When stopping, first stop feeding the screw, wait for the melt in the screw to be emptied, remove the components, and empty the remaining material in the box. Turn off the screw and metering pump in sequence, and finally cut off all power supplies and clean the equipment.

[0037] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A mobile modular melt spinning research system, characterized in that: include: A melt spinning module (1), the melt spinning module (1) comprising a screw extruder (101), a metering pump transmission device (102) and a spinning assembly (103) connected in sequence; a sealed hopper (105) is installed at the feed inlet of the screw extruder (101); spinning raw materials enter the screw extruder (101) from the sealed hopper (105), and finally primary fibers are generated by the spinning assembly (103); the spinning assembly (103) is connected to a cooling module (2); A cooling module (2), the cooling module (2) comprising a static pressure chamber (201), a side blowing device (202) and an oiling device (203); a fan is arranged in the static pressure chamber (201), the wind generated by the fan is connected to the side blowing device (202) through a pipeline, and the side blowing device (202) is used to cool the spun fibers; the oiling device (203) is located on one side of the side blowing device (202) and is used to oil the spun fibers; A stretching and winding module (3), wherein the stretching and winding module (3) is used to stretch and wind the fibers after being cooled by the cooling module (2).

2. A movable modular melt spinning research system according to claim 1, characterized in that: The stretching and winding module (3) comprises a hot roller (301) and a winding device (302); the hot roller (301) is used to stretch the fibers cooled by the cooling module (2) to the winding device (302).

3. A movable modular melt spinning research system according to claim 1, characterized in that: The melt spinning module (1) further comprises a lifting platform (104), wherein the lifting platform (104) is provided with rollers and a brake component; the sealed hopper (105), the screw extruder (101), the metering pump transmission device (102) and the spinning assembly (103) are all fixed on the lifting platform (104).

4. A movable modular melt spinning research system according to claim 1, characterized in that: A water jacket device is also provided at the feed inlet of the screw extruder (101).

5. A movable modular melt spinning research system according to claim 1, characterized in that: The screw component outer shell of the screw extruder (101) is provided with a screw heat insulation cover.

6. A movable modular melt spinning research system according to claim 1, characterized in that: The fan in the static pressure chamber (201) is also connected to a water chiller.

7. A movable modular melt spinning research system according to claim 6, characterized in that: The fan is a centrifugal fan.

8. A movable modular melt spinning research system according to claim 1, characterized in that: The side-blowing device (202) is provided with a filter assembly for filtering the wind generated by the fan in the static pressure chamber (201).

9. A movable modular melt spinning research system according to claim 8, characterized in that: The oiling device (203) is oiled in the manner of an oil tanker.

10. A movable modular melt spinning research method, characterized in that: A movable modular melt spinning system according to any one of claims 1 to 9, comprising the following steps: First, the temperature of the screw extruder (101) is raised to 50°C, then kept at this temperature for 10 minutes, and then raised in steps of 30°C until the temperature reaches a preset spinning process temperature; The spinning raw material is added into the screw extruder (101) from the sealed hopper (105), and then accurately metered by the metering pump transmission device (102) and enters the spinning assembly (103), and the spinning assembly (103) discharges the material to obtain the primary fiber; A fan in the static pressure chamber (201) generates cold air and sends it to the side blowing device (202), and the nascent fibers are cooled by blowing through the side blowing device (202); the cooled fibers are rolled up through the stretching and winding module (3) to complete fiber preparation; and various parameters in the fiber forming process are monitored in real time during the fiber preparation process.

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