Nylon yarn preparation device and method for controlling nylon yarn preparation parameters

Abstract

The invention discloses a polyamide yarn preparation device and a method for controlling polyamide yarn preparation parameters, the polyamide yarn preparation device comprises a spinning assembly and a heating device, the spinning assembly comprises a shell and a spinning plate, a containing cavity is formed in the shell, and the containing cavity can be used for bearing a polyamide raw material in a molten state. The spinneret plate is arranged below the shell, a plurality of screw holes are formed in the spinneret plate and communicated with the containing cavity, and raw materials in the molten state can be extruded out through the screw holes, so that polyamide yarns are formed. The heating device is arranged on the peripheral side of the spinneret assembly and can move relative to the shell in the first direction parallel to the extending direction of the thread hole. According to the heating device, the temperature of the raw materials can be changed by changing the heating intensity of the heating device and the position of the heating device relative to the shell, accurate adjustment of the temperature of the polyamide yarn flowing out of the yarn holes is achieved, the production quality of the polyamide yarn is effectively improved, the rejection rate is reduced, and meanwhile the yield of the polyamide yarn is increased.

Description

Technical Field

[0001] The invention relates to the technical field of nylon yarn production, and in particular to a nylon yarn preparation device and a method for controlling nylon yarn preparation parameters. Background Art

[0002] Inside the spinning box, the molten nylon raw material is sprayed into filaments through the spinneret, and then formed into fibers through cooling, stretching and other steps. The post-heater of the nylon spinning box plays a vital role in the nylon production process. It is usually installed directly behind the spinneret assembly to heat and insulate the spinning assembly. However, since temperature has a great influence on the quality and output of fiber generation, if the temperature inside the assembly is too low, the fiber will become too rigid and difficult to perform subsequent processing operations. If the temperature is too high, it will cause the fiber to melt and stick. The heater in the related art does not accurately control the temperature, which can easily lead to a decrease in the quality of fiber generation and a decrease in fiber output. Summary of the invention

[0003] The main purpose of the present invention is to propose a nylon yarn preparation device and a method for controlling nylon yarn preparation parameters, aiming to solve the technical problem of how to improve the accuracy of temperature control in the nylon yarn production process and improve the production quality and output of nylon yarn.

[0004] To achieve the above object, the present invention provides a nylon yarn preparation device, comprising:

[0005] A spinneret assembly comprises a housing and a spinneret, wherein the housing has a receiving cavity, the receiving cavity is suitable for carrying raw materials in a molten state, the spinneret is arranged below the housing, the spinneret is provided with a plurality of threads, each of the threads is connected to the receiving cavity, and the raw materials are suitable for flowing out through the threads to form nylon threads;

[0006] A heating device is arranged on the peripheral side of the spinneret assembly, and the heating device is configured to be able to move relative to the shell along a first direction, wherein the first direction is parallel to the extension direction of the wire hole.

[0007] In some embodiments, the nylon yarn preparation device further includes a detection instrument, which is located on a side of the spinneret facing away from the shell, and the detection instrument is configured to detect parameters of the nylon yarn flowing out of the yarn hole.

[0008] In some embodiments, the detection instrument is configured to detect the flow rate of the nylon yarn flowing out of the yarn hole.

[0009] In some embodiments, the detection instrument is configured to detect the temperature of the nylon yarn flowing out of the yarn hole.

[0010] In some embodiments, the detection instrument is configured to detect the diameter of the nylon yarn flowing out of the yarn hole.

[0011] In some embodiments, the containing chamber is provided with a screen, and the screen is suitable for filtering raw materials.

[0012] In some embodiments, the spinneret assembly includes a plurality of the shells, the heating device has a receiving space, and each of the shells is located in the receiving space.

[0013] In some embodiments, the accommodating chamber has a temperature-averaging component at one end close to the spinneret, and the temperature-averaging component is configured to be convex in the middle and concave at the edge.

[0014] The second aspect of the present invention further provides a method for controlling nylon yarn preparation parameters, which is suitable for controlling the parameters of nylon yarn produced by the nylon yarn preparation device described in any of the above embodiments, wherein the nylon yarn preparation device includes a spinneret assembly, a heating device arranged on the peripheral side of the spinneret assembly, and a detection instrument arranged on the side of the spinneret away from the housing, and the method for controlling nylon yarn preparation parameters comprises the steps of:

[0015] Controlling the detection instrument to detect the parameters of the nylon yarn flowing out of the yarn hole;

[0016] The heating device is controlled to move along the first direction according to the parameter.

[0017] In some embodiments, the detection instrument is configured to detect the flow rate of the nylon yarn flowing out of the yarn hole. When the flow rate of the nylon yarn is lower than a preset flow rate value, the heating device moves toward the direction close to the spinneret.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] In the technical solution of the present invention, the nylon yarn preparation device includes a spinneret assembly and a heating device, the heating device is arranged on the peripheral side of the spinneret assembly, and the heating device is configured to be able to move relative to the housing in a first direction. The heating device in the present application can change the temperature of the peripheral side of the spinneret assembly by changing the amount of heat it emits. At the same time, the heating device can also move away from or close to the spinneret by displacement in the first direction, so that the temperature around the spinneret can be changed, thereby achieving precise adjustment of the temperature of the nylon yarn flowing out of the yarn hole, avoiding the situation where the temperature of the molten raw material is too low or too high, resulting in the size of the produced nylon yarn being too thick or too thin, etc., effectively improving the production quality of nylon yarn, reducing the scrap rate and increasing the output of nylon yarn. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0021] Figure 1 It is a cross-sectional view of a nylon yarn preparation device in one embodiment of the present invention; wherein the heating device moves along a first direction toward a direction close to the spinneret;

[0022] Figure 2 A top view of a nylon yarn preparation device in a first embodiment of the present invention;

[0023] Figure 3 It is a cross-sectional view of a nylon yarn preparation device in another embodiment of the present invention; wherein the heating device moves in a first direction away from the spinneret;

[0024] Figure 4 It is a cross-sectional view of a nylon yarn preparation device in the second embodiment of the present invention; wherein a temperature equalizing member is provided in the accommodating chamber;

[0025] Figure 5 It is a cross-sectional view of a nylon yarn preparation device in the third embodiment of the present invention; wherein the temperature-equalizing element includes a plurality of temperature-equalizing blocks;

[0026] Figure 6 Schematic diagram of a process for controlling nylon yarn preparation parameters in one embodiment of the present invention.

[0027] Description of Figure Numbers:

[0028] Nylon yarn preparation device 100;

[0029] Spinning assembly 110; spinneret 111; wire hole 1111; accommodating chamber 112; housing 113; temperature equalizing element 114; temperature equalizing block 115;

[0030] Heating device 120;

[0031] Screen plate 130;

[0032] Testing instruments 140;

[0033] The first direction X.

[0034] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0036] In the related art, for the preparation of nylon yarn, the molten raw material is usually squeezed through the wire hole and cooled to form the prefabricated nylon yarn. However, the molten raw material is easily reduced in fluidity after cooling, which affects the quality of the nylon yarn. The raw material sticks to the wire hole and blocks the wire hole, resulting in low efficiency in the preparation of nylon yarn.

[0037] The applicant has found that the heater can play a certain role in heat preservation for the spinneret assembly, so that the temperature inside the spinneret assembly remains constant, ensuring the stability of the melt (the raw material in the molten state used to produce nylon yarn) during the extrusion process. In addition, the setting of the heater is also conducive to keeping the nylon yarn at a certain softness at an appropriate temperature, thereby facilitating the subsequent stretching and winding process of the nylon yarn. If the temperature inside the spinneret assembly is too low, the nylon yarn will become too rigid and difficult to perform subsequent processing operations. If the temperature inside the spinneret assembly is too high, the nylon yarn will melt again or even stick together, affecting the quality and output of the nylon yarn.

[0038] The heater can further reduce the cooling rate of the nylon yarn by adjusting the heating temperature, extend the plastic zone of the nylon yarn, and move the solidification point downward, thereby reducing the tensile tension of the spinneret and reducing the pre-orientation degree of the nascent nylon yarn (the pre-orientation degree is a measure of the phenomenon that the macromolecular chains or segments of the polymer are initially arranged in an orderly manner along the fiber axis under the action of an external force field (such as tensile stress or shear stress) during the spinning process. The degree of pre-orientation not only affects the mechanical properties of the fiber, such as tensile strength and elongation at break, but also affects the crystallization dynamics and crystal morphology of the fiber. The fibers with high pre-orientation have more orderly macromolecules arranged along the fiber axis and tighter intermolecular bonding, which makes the regularity of the arrangement of the fibers not change much during the subsequent stretching process and is not easy to be further stretched), which helps the nylon yarn to obtain a higher orientation degree and better nylon yarn performance in the subsequent stretching process. It has a great effect on the production of high-strength nylon fibers.

[0039] In addition, in the related art, when the nylon yarn is disturbed by external factors or improperly operated during the spinning process, it is easy to produce hairy yarn and broken ends, which not only affects the appearance quality of the nylon yarn, but also reduces the production efficiency. The heater can prevent the nylon yarn from producing hairy yarn and broken ends during the spinning process to a certain extent. The heater reduces the occurrence of these adverse factors by maintaining a constant temperature inside the component, thereby improving the spinning quality and production efficiency of the nylon yarn.

[0040] The applicant initially installed a heater on the outer shell of the spinneret assembly to continuously provide heat to the raw material to ensure the fluidity of the raw material, and the heater can adjust the output temperature. However, the applicant found that the heater can only provide heat to the local part of the raw material, and the heat can only make the raw material reach the expected temperature as a whole after being transferred between the raw material molecules, that is, the temperature change of the raw material has a delay, which easily leads to the staff being unable to obtain information on whether the heat provided by the heater meets the demand in time, and unable to adjust the output temperature of the heater in time according to the actual situation of the nylon yarn formed by extrusion of the raw material, resulting in a decrease in the response speed to the temperature demand during the production of nylon yarn, which is not conducive to improving the production quality and production efficiency of nylon yarn.

[0041] For this reason, please see Figures 1 to 4The present invention provides a nylon yarn preparation device 100, which includes a spinneret assembly 110 and a heating device 120. The spinneret assembly 110 includes a housing 113 and a spinneret plate 111. A housing cavity 112 is formed in the housing 113, and the housing cavity 112 can be used to carry nylon raw materials in a molten state. The spinneret plate 111 is arranged below the housing 113, and a plurality of wire holes 1111 are arranged on the spinneret plate 111. Each wire hole 1111 is connected to the housing cavity 112, and the molten raw materials can be extruded through these wire holes 1111 to form nylon yarn. The heating device 120 is arranged on the peripheral side of the spinneret assembly 110, and can move relative to the housing 113 along a first direction X parallel to the extension direction of the wire holes 1111. The heating device 120 in the present application can change the temperature of the side of the spinneret assembly 110 by changing the amount of heat it emits. At the same time, the heating device 120 can also move away from or close to the spinneret 111 by displacement along the first direction X, so that the temperature around the spinneret 111 can be changed, thereby realizing the precise adjustment of the temperature of the molten material located in the accommodating cavity 112, avoiding the situation that the temperature of the nylon yarn flowing out of the wire hole 1111 is too low or too high, resulting in the size of the nylon yarn being too thick or too thin, etc., effectively improving the production quality of the nylon yarn, reducing the scrap rate and increasing the output of the nylon yarn. In addition, the heating device 120 can reciprocate along the first direction X during the spinning process to uniformly heat the raw material, thereby ensuring that the molten raw material has stable fluidity, thereby ensuring the quality of the prepared nylon yarn. It can be understood that in some embodiments, the heating device 120 adopts a multi-stage design, and each section of the heating device 120 can independently adjust the temperature to adapt to the melting characteristics of different raw materials. The movement of the heating device 120 relative to the housing 113 can be manually driven by the staff. To further improve the accuracy of the temperature control of the heating device 120, in some embodiments, the nylon yarn preparation device 100 further includes a moving mechanism, which is configured to drive the heating device 120 to move along the first direction X. The moving mechanism can use a precision servo motor to ensure the movement accuracy and stability of the heating device 120 along the first direction X, thereby effectively controlling the melting temperature of the raw materials and improving the uniformity and strength of the nylon yarn.

[0042] See also Figure 1In some embodiments, the nylon yarn preparation device 100 is further provided with a detection instrument 140, which can be arranged on a side of the spinneret 111 away from the housing 113, and the detection instrument 140 can detect the parameters of the nylon yarn flowing out of the yarn hole 1111. This design facilitates real-time monitoring of the flow state and temperature of the raw materials, ensures the stability of the parameters during the nylon yarn preparation process, and improves the product quality. In some embodiments, the nylon yarn preparation device 100 includes a controller, which is electrically connected to the detection instrument 140 and can obtain the parameters of the nylon yarn measured by the detection instrument 140. The controller is also electrically connected to the moving mechanism, and the controller can control the driving displacement of the heating device 120 by the moving mechanism. Specifically, the detection instrument 140 obtains the parameters of the nylon yarn (the parameters include but are not limited to the temperature of the nylon yarn after it flows out of the yarn hole 1111, the flow rate of the nylon yarn flowing out of the yarn hole 1111, and the diameter of the nylon yarn, etc.) and converts the parameters into electrical signals and transmits them to the controller. The controller compares the parameters with the preset parameters to determine whether it is necessary to adjust the temperature of the peripheral side of the spinneret assembly 110 and the adjustment method for changing the temperature (the adjustment method includes changing the output temperature of the heating device 120, driving the heating device 120 to move along the first direction X, and driving the heating device 120 to move along the first direction X while changing the output temperature of the heating device 120). If the controller determines that it is necessary to adjust the temperature of the peripheral side of the spinneret assembly 110 and determines the temperature adjustment method (for ease of description, the adjustment method of driving the heating device 120 to move along the first direction X is used as an example for explanation), the controller outputs an electrical signal to the moving mechanism so that the moving mechanism drives the heating device 120 to move along the first direction X (away from the spinneret 111 or close to the spinneret 111).

[0043] It is understood that in some embodiments, the detection instrument 140 can integrate multiple sensors. Exemplarily, the types of sensors include but are not limited to temperature sensors, flow rate sensors, and diameter measurement sensors. Therefore, the detection instrument 140 can monitor in real time the temperature of the molten raw material, the flow rate of the molten raw material flowing out of the wire hole 1111, and the diameter of the generated nylon yarn. In some embodiments, the detection instrument 140 can transmit the parameter data detected by it to the controller through the wireless communication module to achieve real-time monitoring and adjustment of the nylon yarn preparation process, thereby improving the quality and production efficiency of the nylon yarn. It should be noted that the detection instrument 140 can include one or more of the temperature sensor, the flow rate sensor, and the diameter measurement sensor.

[0044] In some embodiments, the detection instrument 140 includes a flow rate sensor, which can be arranged on the side of the spinneret 111 away from the accommodating chamber 112, and the flow rate sensor can detect the flow rate of the raw material flowing out of the thread hole 1111. Monitoring the flow rate of the raw material flowing out of the thread hole 1111 ensures the stability and uniformity of the nylon yarn preparation process, and avoids the different wire diameters of the nylon yarn caused by the flow rate fluctuation, which affects the production quality of the nylon yarn. In addition, the flow rate of the raw material flowing out of the thread hole 1111 can reflect the temperature of the raw material in the molten state in the accommodating chamber 112. Specifically, when other factors such as pressure remain unchanged, the higher the temperature, the higher the melting degree of the raw material, the thinner it is, and the higher the fluidity, the higher the flow rate of the raw material flowing out of the thread hole 1111, and when the temperature is lower, the lower the melting degree of the raw material, the more viscous it is, the lower the fluidity, and the lower the flow rate of the raw material flowing out of the thread hole 1111. Therefore, the detection instrument 140 is used to monitor the flow rate data of the raw material flowing out of the wire hole 1111, and the controller can analyze and compare the flow rate data and control the output temperature of the heating device 120 and the position of the heating device 120 relative to the shell 113, thereby realizing precise adjustment of the temperature of the molten raw material in the accommodating cavity 112.

[0045] The flow rate sensor can be a turbine flow meter, a radar flow rate sensor, an ultrasonic flow rate sensor, etc. When it is detected that the flow rate of the raw material flowing out of the wire hole 1111 is lower than the preset value, the system automatically adjusts the heating intensity of the heating device 120 or the setting position of the heating device 120 relative to the shell 113 to increase the fluidity of the raw material, thereby maintaining a stable flow rate and ensuring the continuity and uniformity of the nylon yarn.

[0046] In some embodiments, the detection instrument 140 includes a temperature sensor, which can be arranged on the side of the spinneret 111 away from the accommodating chamber 112 to detect the temperature of the raw material flowing out of the wire hole 1111. In other embodiments, the detection instrument 140 can also be arranged in the accommodating chamber 112 to detect the temperature of the raw material. Using the detection instrument 140 to monitor the temperature of the raw material can effectively ensure that the raw material flows out of the wire hole 1111 in a suitable molten state to form nylon yarn, and avoid overheating or overcooling of the raw material to affect the molding quality of the nylon yarn. The temperature sensor can be an optical fiber temperature sensor, which has high precision and anti-interference ability, and can accurately monitor the real-time temperature of the raw material. When the temperature is detected to be lower than the preset value, the heating device 120 moves in the direction close to the spinneret 111, increases the heating of the raw material, ensures that the raw material is extruded at a suitable temperature, and improves the molding quality and mechanical properties of the nylon yarn. It should be noted that the temperature sensor can also be a thermistor temperature sensor, a thermocouple temperature sensor, a thermal resistor temperature sensor, and an infrared temperature sensor.

[0047] In some embodiments, the detection instrument 140 is configured to detect the diameter of the nylon yarn formed by the raw material flowing out of the wire hole 1111. Monitoring the diameter of the nylon yarn formed by the raw material flowing out of the wire hole 1111 effectively ensures the size consistency of the nylon yarn, thereby ensuring the quality of the nylon yarn. In some embodiments, the detection instrument 140 may include a laser rangefinder, which is arranged on the side of the spinneret 111 away from the accommodating cavity 112, and can monitor the diameter of the nylon yarn in real time with an accuracy of up to micron level. When it is detected that the diameter of the nylon yarn deviates from the set value, the system automatically adjusts the position and heating intensity of the heating device 120, thereby controlling the extrusion rate of the raw material, ensuring the uniform diameter of the nylon yarn, and improving the product quality. It should be noted that the detection instrument 140 can use a laser displacement sensor or a fiber diameter measuring instrument to measure the diameter of the nylon yarn.

[0048] See also Figure 1 and Figure 2 , the heating device 120 is arranged around the spinneret assembly 110, so that the heating device 120 can surround the spinneret assembly 110 in all directions, ensure that the raw material is heated evenly, and improve the quality of the nylon yarn. It can be understood that in some embodiments, the heating device 120 can adopt a ring-shaped electric heating tube, surround the spinneret assembly 110, and realize temperature closed-loop control through a PID controller (specifically, the temperature sensor measures the temperature of the raw material in real time, and converts the measured temperature value (usually an analog signal) into an electrical signal, and transmits it to the PID controller, and the PID controller calculates and analyzes the electrical signal and outputs an output signal to adjust the heating power of the ring-shaped electric heating tube) to ensure that the temperature of the raw material is stable during the extrusion process and improve the mechanical properties and stability of the nylon yarn.

[0049] In some embodiments, see Figure 1 and Figure 3 The accommodating chamber 112 is provided with a screen for filtering the raw materials, thereby removing impurities in the raw materials and improving the purity and strength of the nylon yarn. The screen can be made of stainless steel, which is resistant to high temperature and corrosion and has a long service life. The screen can be designed to be detachable, which is convenient for regular cleaning and replacement, ensuring the purity of the raw materials and improving the quality and production efficiency of the nylon yarn.

[0050] To further improve the production efficiency of nylon yarn, please refer to Figure 2The spinneret assembly 110 includes a plurality of shells 113, and the heating device 120 has a housing space, and each shell 113 is located in the housing space. Each shell 113 has a housing cavity 112 for carrying raw materials in a molten state. The plurality of shells 113 can work at the same time, and the heating device 120 can heat these shells 113 at the same time, thereby improving production efficiency and flexibility. It is understandable that, in some embodiments, the spinneret assembly 110 is designed as a modular structure, and the number of spinneret modules can be flexibly increased or decreased according to production needs, so as to adapt to production requirements of different scales and improve production efficiency and equipment utilization.

[0051] See also Figure 4 In some embodiments, the end of the accommodating chamber 112 near the spinneret 111 has a temperature-averaging member 114, which is configured to be convex in the middle and concave at the edge. The special shape design of the temperature-averaging member 114 can make the temperature of the raw material near the shell 113 before flowing into the spinneret 111 close to the temperature of the raw material at the center of the accommodating chamber 112, ensuring that the temperature of the raw material at various locations in the accommodating chamber 112 is consistent when the nylon yarn flows out of the spinneret 111, avoiding the instability of the nylon yarn quality due to uneven temperature distribution. In some embodiments, the temperature-averaging member 114 is made of a material with good thermal conductivity. For example, the material used for the temperature-averaging member 114 can be copper or aluminum.

[0052] It should be noted that in the related art, when no heater is provided on the peripheral side of the spinneret assembly, the molten raw material is contained in the shell, and during the process, the temperature of the molten raw material gradually decreases, wherein the temperature of the molten raw material becomes lower and lower from the center of the accommodating chamber to the inner wall of the shell. In addition, the temperature of the molten raw material decreases as the direction from the screen plate to the spinneret plate increases. In the present embodiment, the temperature-equalizing member 114 provided in the accommodating chamber 112 is shaped as a convex middle part and a concave edge. The position of the molten raw material at the convex middle part of the temperature-equalizing member 114 is higher than the position of the molten raw material at the concave edge. Therefore, the temperature of the molten raw material at the convex middle part of the temperature-equalizing member 114 decreases very slowly. Since a heating device 120 is provided on the peripheral side of the spinneret assembly 110, the heating device 120 can provide heat for the molten raw material contained in the accommodating chamber 112, thereby reducing the rate at which the temperature of the molten raw material decreases, and the heating device 120 can ensure that the temperature of the molten raw material near the shell 113 is the same as the temperature of the molten raw material located at the center of the accommodating chamber 112, further ensuring that the temperature of the raw materials at various locations near the spinneret 111 is the same, thereby improving the production quality of the nylon yarn. In some embodiments, the temperature equalizing member 114 is integrally provided with the spinneret 111. In other embodiments, the temperature equalizing member 114 is separately provided with the spinneret 111, and the temperature equalizing member 114 is connected to the shell 113. In still other embodiments, please refer to Figure 5The temperature-averaging member 114 includes a plurality of temperature-averaging blocks 115, each temperature-averaging block 115 corresponds to each thread hole 1111, and each thread hole 1111 passes through the temperature-averaging block 115. In the direction from the center of the accommodating cavity 112 to the housing 113, the height of each temperature-averaging block 115 gradually decreases, and the highest point of each temperature-averaging block 115 is generally convex in the middle and concave at the edge.

[0053] See also Figure 6 The second aspect of the present invention further provides a method for controlling nylon yarn preparation parameters, which is applicable to controlling the nylon yarn preparation device 100 described in any of the above embodiments, wherein the nylon yarn preparation device 100 includes a spinneret assembly 110, a heating device 120 and a detection instrument 140. The method for controlling nylon yarn preparation parameters includes but is not limited to the following steps:

[0054] S101: Control the detection instrument 140 to detect the parameters of the nylon yarn flowing out of the yarn hole 1111;

[0055] S102: adjusting the movement direction of the heating device 120 according to the parameters.

[0056] It is understood that in some embodiments, the control system of the nylon yarn preparation device 100 can use a PLC (programmable logic controller) and a touch screen interface, and the operator can set the production parameters of the nylon yarn through the touch screen, such as the flow rate of the raw material flowing out of the thread hole 1111, the temperature of the raw material, and the diameter of the nylon yarn. The PLC adjusts the heating intensity of the heating device 120 and its position relative to the housing 113 in real time according to the data fed back by the detection instrument 140, thereby realizing refined and intelligent control of the nylon yarn preparation process and improving production efficiency and product quality.

[0057] Exemplarily, the detection instrument 140 is configured to detect the flow rate of the nylon yarn flowing out of the yarn hole 1111. When the flow rate is lower than the preset flow rate value, the heating device 120 moves towards the direction close to the spinneret 111. This design ensures the continuous production and quality stability of the nylon yarn. The controller automatically adjusts the heating intensity of the heating device 120 by detecting the data of the flow rate sensor. When the flow rate drops, the heating device 120 moves closer to the spinneret 111, increasing the heating of the raw material, improving the fluidity of the raw material in the molten state, ensuring the continuous production of the nylon yarn, and maintaining a stable flow rate, improving production efficiency and product quality. Among them, the precise movement and independent temperature control function of the heating device 120 ensure that the raw material is heated evenly, and improve the mechanical properties and stability of the nylon yarn. The integrated design of the detection instrument 140 monitors the parameters of the raw material in real time, ensures the stability of the parameters of the nylon yarn production process, and improves the product quality. The nylon yarn preparation device 100 and control method provided by the present invention achieve high-quality and high-efficiency production of nylon yarn by accurately controlling the melting state of the raw materials and the forming process of the nylon yarn, and can meet the dual demands of the textile industry for nylon yarn quality and production efficiency.

[0058] Exemplarily, 8 groups of experimental nylon yarns were prepared using the nylon yarn preparation device 100 and the method for controlling nylon yarn preparation parameters provided by the present invention, and various parameters of each group of nylon yarns were measured as follows:

[0059]

[0060]

[0061] Based on the above data, the analysis is as follows:

[0062] Draft ratio 1.6: When the spinning speed is 5400, the temperature of the heating device 120 increases by 3°C, and the breaking strength increases by 1.07cn / dtex. When the spinning speed is 5450, the breaking strength increases by 0.05cn / dtex.

[0063] Draft ratio 1.7: When the spinning speed is 5400, the temperature of the heating device 120 increases by 3°C, and the breaking strength increases by 0.3cn / dtex. When the spinning speed is 5450, the breaking strength increases by 0.67cn / dtex.

[0064] By increasing the temperature of the spinning assembly 110 through the heating device 120, the nylon 6 can be induced to transform from the γ crystal form to the α crystal form to a certain extent, so that the molecular chain arrangement is more regular, the crystallinity and orientation of the filaments are increased, and the breaking strength is improved.

[0065] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0066] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or", "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0067] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A nylon yarn preparation device, characterized in that: include: A spinneret assembly comprises a housing and a spinneret, wherein the housing has a receiving cavity, the receiving cavity is suitable for carrying raw materials in a molten state, the spinneret is arranged below the housing, the spinneret is provided with a plurality of threads, each of the threads is connected to the receiving cavity, and the raw materials are suitable for flowing out through the threads to form nylon threads; A heating device is arranged on the peripheral side of the spinneret assembly, and the heating device is configured to be able to move relative to the shell along a first direction, wherein the first direction is parallel to the extension direction of the wire hole.

2. The nylon yarn preparation device according to claim 1, characterized in that: The nylon yarn preparation device also includes a detection instrument, which is located on a side of the spinneret away from the shell, and is configured to detect parameters of the nylon yarn flowing out of the yarn hole.

3. The nylon yarn preparation device according to claim 2, characterized in that: The detection instrument is configured to detect the flow rate of the nylon yarn flowing out of the yarn hole.

4. The nylon yarn preparation device according to claim 2, characterized in that: The detection instrument is configured to be able to detect the temperature of the nylon yarn flowing out of the yarn hole.

5. The nylon yarn preparation device according to claim 2, characterized in that: The detection instrument is configured to be able to detect the diameter of the nylon yarn flowing out of the yarn hole.

6. The nylon yarn preparation device according to claim 1, characterized in that: The accommodating chamber is provided with a screen, and the screen is suitable for filtering raw materials.

7. The nylon yarn preparation device according to claim 1, characterized in that: The spinneret assembly comprises a plurality of shells, the heating device has a containing space, and each shell is located in the containing space.

8. The nylon yarn preparation device according to claim 1, characterized in that: The accommodating cavity has a temperature-averaging component at one end close to the spinneret, and the temperature-averaging component is configured in a shape with a convex middle and a concave edge.

9. A method for controlling nylon yarn preparation parameters, suitable for controlling the parameters of nylon yarn produced by the nylon yarn preparation device according to any one of claims 1 to 8, wherein the nylon yarn preparation device comprises a spinneret assembly, a heating device arranged on the periphery of the spinneret assembly, and a detection instrument arranged on the side of the spinneret plate away from the housing, characterized in that: The method for controlling the preparation parameters of nylon yarn comprises the steps of: Controlling the detection instrument to detect the parameters of the nylon yarn flowing out of the yarn hole; The heating device is controlled to move along the first direction according to the parameter.

10. The method for controlling nylon yarn preparation parameters according to claim 9, characterized in that: The detection instrument is configured to detect the flow rate of the nylon yarn flowing out of the yarn hole. When the flow rate of the nylon yarn is lower than a preset flow rate value, the heating device moves in a direction close to the spinneret.

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