Method of making a monofilament preparation roll

Abstract

The application discloses a monofilament preparation winding method, aiming to provide a monofilament preparation winding method which can effectively improve the stability of monofilament winding tension in the monofilament winding process, can avoid the problems of too tight winding of inner layer filaments, and can avoid the problems of sagging and difficult normal winding in the monofilament process. It comprises the following steps: setting monofilament winding tension F according to monofilament specification; adopting motor driving winding shaft rotation to wind monofilament, and the control method of motor winding torque is as follows: setting N monitoring points from the start winding to the end of filament cylinder radius every increase d x beta; setting the time point ti corresponding to each monitoring point, i = 0, 1, 2- - -N; setting the winding torque Mi corresponding to each time point, i = 0, 1, 2- - -N, Mi = F x Ri; Ri is the filament cylinder radius corresponding to the i th monitoring point; Ri = R0 + d x beta x i; in the monofilament winding process, the winding torque of the motor is set to Mi according to the time point ti.

Description

Technical Field

[0001] This invention relates to the field of monofilament preparation technology, and specifically to a method for preparing and winding monofilaments. Background Technology

[0002] In the field of materials preparation technology, the preparation of plastic monofilaments is a crucial step. The preparation process typically includes steps such as melting, metering, extrusion, cold water setting, drawing, high-temperature setting, and winding. The winding step involves winding the drawn and high-temperature set plastic monofilaments onto a spool to form the final product. In this process, the magnitude and uniformity of the winding tension are important factors affecting the filament's properties.

[0003] Current monofilament winding methods involve using a motor to drive a winding shaft to rotate and wind up the monofilament. During this process, the motor applies a constant winding torque to the winding shaft to drive the winding drum. However, existing winding methods have several major problems. According to the relationship between the motor's output winding torque, the yarn winding tension, and the drum radius, M = F * R, where M is the motor's output winding torque, R is the drum radius, and F is the monofilament winding tension. Because the monofilament winding method uses a constant winding torque, meaning the winding torque M remains constant from the start to the end of winding; and the bobbin radius R gradually increases during this process (but not at a uniform rate), the winding tension of the monofilament is uneven. At the start of winding, the bobbin radius is at its smallest, and the winding tension on the monofilament is at its maximum; at the end of winding, the bobbin radius reaches its maximum, and the winding tension on the monofilament is at its minimum. Therefore, to prevent the monofilament from slacking and sagging in the later stages of winding, the motor winding torque needs to be set to a larger value. However, setting the winding torque to a large value can easily lead to the inner layer of yarn being wound too tightly, which is not conducive to the smooth unwinding of the yarn during subsequent warping and weaving, and may cause problems such as yarn breakage. To avoid the inner layer yarns being wound too tightly, which would hinder the smooth unwinding of the yarns during subsequent warping and weaving, the motor winding torque needs to be set to a smaller value. However, setting the winding torque to a smaller value can easily lead to problems such as loosening and sagging of the single filaments during the process, making it difficult to wind them up properly. Summary of the Invention

[0004] The purpose of this invention is to provide a method for preparing and winding monofilaments, which can effectively improve the stability of the winding tension of monofilaments during the winding process. This method can avoid the inner layer of filaments being wound too tightly, and can also avoid the problems of loosening and sagging during the monofilament process, making it difficult to wind normally, thereby improving the quality and performance of the wound monofilaments.

[0005] The technical solution of this invention is: A method for preparing and winding monofilaments includes the following steps: Set the monofilament winding tension F according to the monofilament specifications; The single filament is wound by rotating a winding shaft driven by a motor. The method for controlling the winding torque of the motor during this process is as follows: a monitoring point is set for every increase of d×β in the radius of the winding drum from the start of winding to the end of winding, for a total of N monitoring points. Set the time point ti corresponding to each monitoring point, i = 0, 1, 2---N; Set the winding torque Mi corresponding to each time point, i = 0, 1, 2---N, Mi = F × Ri, F is the set winding tension; Ri is the radius of the spool corresponding to the i-th monitoring point; Ri=R0+d×β×i, where, R0 is the radius of the yarn spool at the start of winding; d is the diameter of the single filament; β is a fixed value between 1 and 50; During the monofilament winding process, the winding torque of the motor is set to Mi according to the time point ti. In this monofilament preparation and winding method, the winding torque of the motor is set to Mi according to the time point ti. The winding torque Mi is set according to the actual filament drum radius at each time point during the winding process. It increases synchronously with the increase of the filament drum radius to offset the decrease in monofilament winding tension caused by the increase of the filament drum radius. Thus, the winding tension of the monofilament is controlled within a set range with small fluctuations throughout the winding process, effectively improving the stability of the monofilament winding tension during the winding process. This avoids both the inner layer of filament being wound too tightly and the problems of loosening and sagging during the monofilament winding process, making it difficult to wind normally, thereby improving the quality and performance of the monofilament roll.

[0006] Preferably, the monofilament winding speed V is set according to the monofilament specifications, and the time point ti is obtained by the following formula. ti=L×αi÷V ti represents the time point corresponding to the i-th monitoring point; L is the total length of the monofilament winding; V is the set winding speed; αi is the length coefficient of the i-th monitoring point; αi=(R0+R1+---+Ri)÷(R0+R1+---+Rn), where, R0 is the radius of the yarn spool at the start of winding; Rn is the radius of the yarn drum at the end of winding; Ri is the radius of the bobbin corresponding to the i-th monitoring point. Since the time point ti in this embodiment is calculated using the above formula (the formula for calculating time point ti is obtained by using L (total winding length of the monofilament), V (set winding linear speed), and αi (length coefficient of the i-th monitoring point), the time point ti corresponding to each monitoring point can be accurately determined. Then, the winding torque Mi is calculated using the formula for winding torque Mi, using F (set monofilament winding tension) and Ri (the radius of the bobbin corresponding to the i-th monitoring point). This allows for accurate determination of the time point and corresponding winding torque Mi at each monitoring point, and the corresponding winding torque of the motor is set to Mi. No sensor detection is required throughout the process (effectively avoiding the influence of equipment fluctuations and sensor detection accuracy), thereby further improving the stability of the monofilament winding tension during the entire winding process and further improving the quality and performance of the monofilament roll.

[0007] Preferably, the monofilament winding speed V remains constant from the start of winding to the end of winding.

[0008] As a preferred option, the number of N monitoring points is obtained using the following formula. N = (Rn - R0) ÷ (d × β), R0 is the radius of the yarn spool at the start of winding; Rn is the radius of the yarn drum at the end of winding; d is the diameter of the monofilament; β is a fixed value between 1 and 50. Based on this, the smaller the β value, the more monitoring points there are. More monitoring points are more conducive to improving the stability of the winding tension of the monofilament throughout the winding process. On the other hand, increasing the β value can reduce the number of monitoring points, which helps to reduce the difficulty of control and facilitates actual operation.

[0009] Preferably, during the monofilament winding process, at each time point ti, the input voltage of the motor is set according to the winding torque Mi, thereby setting the winding torque of the motor to Mi accordingly.

[0010] Preferably, the monofilament winding tension F is set to remain constant from the start of winding to the end of winding.

[0011] Preferably, β is a fixed value between 1 and 10. This scheme sets the β value to be relatively small, thereby increasing the number of monitoring points. The more monitoring points there are, the better it is to improve the stability of the winding tension of the monofilament throughout the winding process.

[0012] Preferably, β is a fixed value between 10 and 20. A smaller β value results in more monitoring points, which is more conducive to improving the stability of the monofilament winding tension throughout the winding process. Conversely, a larger β value reduces the number of monitoring points, thus lowering the control difficulty and facilitating practical operation. Therefore, this solution sets β to a fixed value between 10 and 20. This avoids both excessively small β values ​​leading to too many monitoring points and increased control difficulty, and excessively large β values ​​leading to too few monitoring points, which would affect the stability of the monofilament winding tension during the winding process.

[0013] Preferably, β is a fixed value between 20 and 40. This scheme sets the β value to a relatively large value to reduce the number of monitoring points, which helps to reduce the difficulty of control and facilitates actual operation.

[0014] The beneficial effects of this invention are: it can control the winding tension of the monofilament within a set range with small fluctuations throughout the winding process, effectively improving the stability of the winding tension of the monofilament during the winding process. This can avoid the inner layer yarn being wound too tightly, and also avoid the problem of loosening and sagging during the monofilament process, making it difficult to wind normally, thereby improving the quality and performance of the monofilament roll. Detailed Implementation

[0015] The present invention will be further described in detail below with reference to specific embodiments: Specific embodiment one, a method for preparing and winding monofilaments, includes the following steps: Set the monofilament winding tension F according to the monofilament specifications.

[0016] The monofilament is wound by rotating the winding shaft of the spool driven by a motor. The method for controlling the motor winding torque during this process is as follows. From the start to the end of winding, a monitoring point is set for every increase of d × β in the bobbin radius, for a total of N monitoring points. d is the diameter of the monofilament; β is a fixed value between 1 and 50 (this fixed value is an integer). During the monofilament winding process, the bobbin radius increases by d for each layer wound. Setting a monitoring point for every increase of d × β in the bobbin radius from the start to the end of winding is equivalent to setting a monitoring point for every β layers wound.

[0017] Set the time point ti corresponding to each monitoring point, i = 0, 1, 2---N.

[0018] Set the winding torque Mi corresponding to each time point, i = 0, 1, 2---N.

[0019] Mi = F × Ri, where F is the set monofilament winding tension; Ri is the radius of the spool corresponding to the i-th monitoring point.

[0020] Ri=R0+d×β×i.

[0021] R0 is the radius of the yarn spool at the start of winding; d is the diameter of the monofilament; i = 0, 1, 2---N; β is a fixed value between 1 and 50 (this fixed value is an integer). In this embodiment, the value of β is the same in all formulas.

[0022] During the monofilament winding process, the winding torque of the motor is set to Mi according to the time point ti.

[0023] Compared to existing technologies that use constant torque to wind monofilaments, which suffer from drawbacks such as "to prevent the monofilaments from slagging in the later stages of winding, the motor winding torque needs to be set to a large value, which can easily lead to the inner layer of yarn being wound too tightly, hindering the smooth unwinding of yarns during subsequent warping and weaving, and potentially causing breakage; conversely, to avoid the inner layer of yarn being wound too tightly, which hinders the smooth unwinding of yarns during subsequent warping and weaving, the motor winding torque needs to be set to a small value, which can easily lead to the monofilaments slagging and becoming difficult to wind properly," the monofilament preparation and winding method of this embodiment, during the monofilament winding process, ... Based on time point ti, the winding torque of the motor is set to Mi. The winding torque Mi is set according to the actual filament drum radius at each time point during the winding process. It increases synchronously with the increase of the filament drum radius to offset the decrease in single filament winding tension caused by the increase of the filament drum radius. Thus, the winding tension of the single filament is controlled within a set range with small fluctuations throughout the winding process, effectively improving the stability of the single filament winding tension during the winding process (achieving constant tension winding). This can avoid the inner layer filament being wound too tightly, and can also avoid the problem of loosening and sagging of the single filament during the winding process, making it difficult to wind normally. This improves the quality and performance of the single filament roll, which is beneficial to subsequent processing and use.

[0024] Specific embodiment two, a method for preparing and winding monofilaments, includes the following steps: (i) Set the monofilament winding tension F and the monofilament winding speed V according to the monofilament specifications. In this embodiment, the monofilament winding tension F is set to remain constant from the start of winding to the end of winding. The monofilament winding speed V is also set to remain constant from the start of winding to the end of winding.

[0025] (ii) The single filament is wound by rotating the winding shaft driven by a motor. The control method of the motor winding torque in this process is as follows: Step 1, from the start of winding to the end of winding, a monitoring point is set for every increase of d×β in the radius of the filament drum, and a total of N monitoring points are set.

[0026] N=(Rn-R0)÷(d×β), where, R0 is the radius of the yarn spool at the start of winding; Rn is the radius of the yarn drum at the end of winding; d is the diameter of the monofilament; β is a fixed value between 1 and 50 (this fixed value is an integer). In this embodiment, β is a fixed value between 1 and 10, for example, β can be 1, 2, 5 or 10.

[0027] During the monofilament winding process, the radius of the filament bobbin increases by d for each layer wound. From the start to the end of winding, a monitoring point is set for every d×β increase in the filament bobbin radius, which is equivalent to setting a monitoring point for every β layers wound from the start to the end of winding.

[0028] Step 2: Set the time point ti for each monitoring point, i = 0, 1, 2---N; ti=L×αi÷V ti represents the time point corresponding to the i-th monitoring point; L is the total length of the monofilament winding; V is the set winding speed; αi is the length coefficient of the i-th monitoring point; αi=(R0+R1+---+Ri)÷(R0+R1+---+Rn), where, R0 is the radius of the yarn spool at the start of winding; Rn is the radius of the yarn drum at the end of winding; Ri is the radius of the spool corresponding to the i-th monitoring point. By calculating the set time point ti using the above formula, the time point ti corresponding to each monitoring point can be accurately determined.

[0029] Step 3: Set the winding torque Mi corresponding to each time point, i = 0, 1, 2---N. Mi = F × Ri, where F is the set monofilament winding tension; Ri is the radius of the spool corresponding to the i-th monitoring point; Ri=R0+d×β×i, where, R0 is the radius of the yarn spool at the start of winding; d is the diameter of the monofilament; β is a fixed value between 1 and 50 (this fixed value is an integer).

[0030] In this embodiment, the value of β is the same in all the formulas.

[0031] Step 4: During the monofilament winding process, the winding torque of the motor is set to Mi according to each time point ti. That is, during the monofilament winding process, at time point t1, the winding torque of the motor is set to M1; at time point t2, the winding torque of the motor is set to M2; and at time point ti, the winding torque of the motor is set to Mi.

[0032] Compared to existing technologies that use constant torque to wind monofilaments, which suffer from drawbacks such as "to prevent the monofilaments from slagging in the later stages of winding, the motor winding torque needs to be set to a large value, which can easily lead to the inner layer of yarn being wound too tightly, hindering the smooth unwinding of yarns during subsequent warping and weaving, and potentially causing breakage; conversely, to avoid the inner layer of yarn being wound too tightly, which hinders the smooth unwinding of yarns during subsequent warping and weaving, the motor winding torque needs to be set to a small value, which can easily lead to the monofilaments slagging and becoming difficult to wind properly," the monofilament preparation and winding method of this embodiment, during the monofilament winding process, ... Based on time point ti, the winding torque of the motor is set to Mi. The winding torque Mi is set according to the actual filament drum radius at each time point during the winding process. It increases synchronously with the increase of the filament drum radius to offset the decrease in single filament winding tension caused by the increase of the filament drum radius. Thus, the winding tension of the single filament is controlled within a set range with small fluctuations throughout the winding process, effectively improving the stability of the single filament winding tension during the winding process (achieving constant tension winding). This can avoid the inner layer filament being wound too tightly, and can also avoid the problem of loosening and sagging of the single filament during the winding process, making it difficult to wind normally. This improves the quality and performance of the single filament roll, which is beneficial to subsequent processing and use.

[0033] On the other hand, since the time point ti in this embodiment is calculated and set using the above formula (the calculation formula for time point ti is obtained by using L as the total winding length of the monofilament, V as the set winding linear speed, and αi as the length coefficient of the i-th monitoring point), the time point ti corresponding to each monitoring point can be accurately determined. Then, the winding torque Mi is calculated using the formula for winding torque Mi, which is calculated by using F as the set monofilament winding tension and Ri as the yarn drum radius corresponding to the i-th monitoring point. This allows the system to accurately locate the time point and the corresponding winding torque Mi at each monitoring point, and set the winding torque of the motor accordingly to Mi. The entire process does not require sensor detection (effectively avoiding the influence of equipment fluctuations and sensor detection accuracy), thereby further improving the stability of the monofilament winding tension during the entire winding process and further improving the quality and performance of the monofilament roll.

[0034] In this embodiment, β is a fixed value between 1 and 10. Setting the β value to a smaller value increases the number of monitoring points. More monitoring points are more conducive to improving the stability of the monofilament winding tension during the entire winding process and reducing the fluctuation range of the monofilament winding tension.

[0035] In this embodiment, during the monofilament winding process, at each time point ti, the input voltage of the motor is set according to the winding torque Mi, thereby setting the winding torque of the motor to Mi accordingly.

[0036] Specific embodiment three: A method for preparing and winding monofilaments, including the following steps: (i) Set the monofilament winding tension F and the monofilament winding speed V according to the monofilament specifications. In this embodiment, the monofilament winding tension F is set to remain constant from the start of winding to the end of winding. The monofilament winding speed V is also set to remain constant from the start of winding to the end of winding.

[0037] (ii) The single filament is wound by rotating the winding shaft driven by a motor. The control method of the motor winding torque in this process is as follows: Step 1, from the start of winding to the end of winding, a monitoring point is set for every increase of d×β in the radius of the filament drum, and a total of N monitoring points are set.

[0038] N=(Rn-R0)÷(d×β), where, R0 is the radius of the yarn spool at the start of winding; Rn is the radius of the yarn drum at the end of winding; d is the diameter of the monofilament; β is a fixed value between 1 and 50 (this fixed value is an integer). In this embodiment, β is a fixed value between 10 and 20, for example, β takes the value of 10, 15, or 20.

[0039] During the monofilament winding process, the radius of the filament bobbin increases by d for each layer wound. From the start to the end of winding, a monitoring point is set for every d×β increase in the filament bobbin radius, which is equivalent to setting a monitoring point for every β layers wound from the start to the end of winding.

[0040] Step 2: Set the time point ti for each monitoring point, i = 0, 1, 2---N; ti=L×αi÷V ti represents the time point corresponding to the i-th monitoring point; L is the total length of the monofilament winding; V is the set winding speed; αi is the length coefficient of the i-th monitoring point; αi=(R0+R1+---+Ri)÷(R0+R1+---+Rn), where, R0 is the radius of the yarn spool at the start of winding; Rn is the radius of the yarn drum at the end of winding; Ri is the radius of the spool corresponding to the i-th monitoring point. By calculating the set time point ti using the above formula, the time point ti corresponding to each monitoring point can be accurately determined.

[0041] Step 3: Set the winding torque Mi corresponding to each time point, i = 0, 1, 2---N. Mi = F × Ri, where F is the set monofilament winding tension; Ri is the radius of the spool corresponding to the i-th monitoring point; Ri=R0+d×β×i, where, R0 is the radius of the yarn spool at the start of winding; d is the diameter of the monofilament; β is a fixed value between 1 and 50 (this fixed value is an integer).

[0042] In this embodiment, the value of β is the same in all the formulas.

[0043] Step 4: During the monofilament winding process, the winding torque of the motor is set to Mi according to each time point ti. That is, during the monofilament winding process, at time point t1, the winding torque of the motor is set to M1; at time point t2, the winding torque of the motor is set to M2; and at time point ti, the winding torque of the motor is set to Mi.

[0044] Compared to existing technologies that use constant torque to wind monofilaments, which suffer from drawbacks such as "to prevent the monofilaments from slagging in the later stages of winding, the motor winding torque needs to be set to a large value, which can easily lead to the inner layer of yarn being wound too tightly, hindering the smooth unwinding of yarns during subsequent warping and weaving, and potentially causing breakage; conversely, to avoid the inner layer of yarn being wound too tightly, which hinders the smooth unwinding of yarns during subsequent warping and weaving, the motor winding torque needs to be set to a small value, which can easily lead to the monofilaments slagging and becoming difficult to wind properly," the monofilament preparation and winding method of this embodiment, during the monofilament winding process, ... Based on time point ti, the winding torque of the motor is set to Mi. The winding torque Mi is set according to the actual filament drum radius at each time point during the winding process. It increases synchronously with the increase of the filament drum radius to offset the decrease in single filament winding tension caused by the increase of the filament drum radius. Thus, the winding tension of the single filament is controlled within a set range with small fluctuations throughout the winding process, effectively improving the stability of the single filament winding tension during the winding process (achieving constant tension winding). This can avoid the inner layer filament being wound too tightly, and can also avoid the problem of loosening and sagging of the single filament during the winding process, making it difficult to wind normally. This improves the quality and performance of the single filament roll, which is beneficial to subsequent processing and use.

[0045] On the other hand, since the time point ti in this embodiment is calculated and set using the above formula (the calculation formula for time point ti is obtained by using L as the total winding length of the monofilament, V as the set winding linear speed, and αi as the length coefficient of the i-th monitoring point), the time point ti corresponding to each monitoring point can be accurately determined. Then, the winding torque Mi is calculated using the formula for winding torque Mi, which is calculated by using F as the set monofilament winding tension and Ri as the yarn drum radius corresponding to the i-th monitoring point. This allows the system to accurately locate the time point and the corresponding winding torque Mi at each monitoring point, and set the winding torque of the motor accordingly to Mi. The entire process does not require sensor detection (effectively avoiding the influence of equipment fluctuations and sensor detection accuracy), thereby further improving the stability of the monofilament winding tension during the entire winding process and further improving the quality and performance of the monofilament roll.

[0046] Furthermore, in this embodiment, β is a fixed value between 10 and 20. The smaller the β value, the more monitoring points there are. More monitoring points are more conducive to improving the stability of the winding tension of the monofilament throughout the winding process. On the other hand, increasing the β value can reduce the number of monitoring points, which helps to reduce the control difficulty and facilitate actual operation. Based on this, this embodiment sets β to a fixed value between 10 and 20. On the one hand, it can avoid the β value being too small, resulting in too many monitoring points and increasing the control difficulty. On the other hand, it can also avoid the β value being too large, resulting in too few monitoring points and affecting the stability of the winding tension of the monofilament during the winding process.

[0047] In this embodiment, during the monofilament winding process, at each time point ti, the input voltage of the motor is set according to the winding torque Mi, thereby setting the winding torque of the motor to Mi accordingly.

[0048] Specific embodiment four: A method for preparing and winding monofilaments, including the following steps: (i) Set the monofilament winding tension F and the monofilament winding speed V according to the monofilament specifications. In this embodiment, the monofilament winding tension F is set to remain constant from the start of winding to the end of winding. The monofilament winding speed V is also set to remain constant from the start of winding to the end of winding.

[0049] (ii) The single filament is wound by rotating the winding shaft driven by a motor. The control method of the motor winding torque in this process is as follows: Step 1, from the start of winding to the end of winding, a monitoring point is set for every increase of d×β in the radius of the filament drum, and a total of N monitoring points are set.

[0050] N=(Rn-R0)÷(d×β), where, R0 is the radius of the yarn spool at the start of winding; Rn is the radius of the yarn drum at the end of winding; d is the diameter of the monofilament; β is a fixed value between 1 and 50 (this fixed value is an integer). In this embodiment, β is a fixed value between 20 and 40, for example, β can be 20, 25, 30, or 40.

[0051] During the monofilament winding process, the radius of the filament bobbin increases by d for each layer wound. From the start to the end of winding, a monitoring point is set for every d×β increase in the filament bobbin radius, which is equivalent to setting a monitoring point for every β layers wound from the start to the end of winding.

[0052] Step 2: Set the time point ti for each monitoring point, i = 0, 1, 2---N; ti=L×αi÷V ti represents the time point corresponding to the i-th monitoring point; L is the total length of the monofilament winding; V is the set winding speed; αi is the length coefficient of the i-th monitoring point; αi=(R0+R1+---+Ri)÷(R0+R1+---+Rn), where, R0 is the radius of the yarn spool at the start of winding; Rn is the radius of the yarn drum at the end of winding; Ri is the radius of the spool corresponding to the i-th monitoring point. By calculating the set time point ti using the above formula, the time point ti corresponding to each monitoring point can be accurately determined.

[0053] Step 3: Set the winding torque Mi corresponding to each time point, i = 0, 1, 2---N. Mi = F × Ri, where F is the set monofilament winding tension; Ri is the radius of the spool corresponding to the i-th monitoring point; Ri=R0+d×β×i, where, R0 is the radius of the yarn spool at the start of winding; d is the diameter of the monofilament; β is a fixed value between 1 and 50 (this fixed value is an integer).

[0054] In this embodiment, the value of β is the same in all the formulas.

[0055] Step 4: During the monofilament winding process, the winding torque of the motor is set to Mi according to each time point ti. That is, during the monofilament winding process, at time point t1, the winding torque of the motor is set to M1; at time point t2, the winding torque of the motor is set to M2; and at time point ti, the winding torque of the motor is set to Mi.

[0056] Compared to existing technologies that use constant torque to wind monofilaments, which suffer from drawbacks such as "to prevent the monofilaments from slagging in the later stages of winding, the motor winding torque needs to be set to a large value, which can easily lead to the inner layer of yarn being wound too tightly, hindering the smooth unwinding of yarns during subsequent warping and weaving, and potentially causing breakage; conversely, to avoid the inner layer of yarn being wound too tightly, which hinders the smooth unwinding of yarns during subsequent warping and weaving, the motor winding torque needs to be set to a small value, which can easily lead to the monofilaments slagging and becoming difficult to wind properly," the monofilament preparation and winding method of this embodiment, during the monofilament winding process, ... Based on time point ti, the winding torque of the motor is set to Mi. The winding torque Mi is set according to the actual filament drum radius at each time point during the winding process. It increases synchronously with the increase of the filament drum radius to offset the decrease in single filament winding tension caused by the increase of the filament drum radius. Thus, the winding tension of the single filament is controlled within a set range with small fluctuations throughout the winding process, effectively improving the stability of the single filament winding tension during the winding process (achieving constant tension winding). This can avoid the inner layer filament being wound too tightly, and can also avoid the problem of loosening and sagging of the single filament during the winding process, making it difficult to wind normally. This improves the quality and performance of the single filament roll, which is beneficial to subsequent processing and use.

[0057] On the other hand, since the time point ti in this embodiment is calculated and set using the above formula (the calculation formula for time point ti is obtained by using L as the total winding length of the monofilament, V as the set winding linear speed, and αi as the length coefficient of the i-th monitoring point), the time point ti corresponding to each monitoring point can be accurately determined. Then, the winding torque Mi is calculated using the formula for winding torque Mi, which is calculated by using F as the set monofilament winding tension and Ri as the yarn drum radius corresponding to the i-th monitoring point. This allows the system to accurately locate the time point and the corresponding winding torque Mi at each monitoring point, and set the winding torque of the motor accordingly to Mi. The entire process does not require sensor detection (effectively avoiding the influence of equipment fluctuations and sensor detection accuracy), thereby further improving the stability of the monofilament winding tension during the entire winding process and further improving the quality and performance of the monofilament roll.

[0058] Furthermore, in this embodiment, β is a fixed value between 20 and 40. This scheme sets the β value to a relatively large value to reduce the number of monitoring points, which helps to reduce the difficulty of control and facilitates actual operation.

[0059] In this embodiment, during the monofilament winding process, at each time point ti, the input voltage of the motor is set according to the winding torque Mi, thereby setting the winding torque of the motor to Mi accordingly.

[0060] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications, alterations, and equivalent transformations made to the above embodiments based on the technical essence of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A method for preparing and winding monofilaments, characterized in that, Includes the following steps: Set the monofilament winding tension F according to the monofilament specifications; The monofilament is wound up using a motor-driven take-up shaft. The method for controlling the motor's winding torque is as follows. A monitoring point is set for every increase of d×β in the radius of the yarn drum from the start of winding to the end, for a total of N monitoring points; Set the time point ti corresponding to each monitoring point, i=0, 1, 2---N; Set the winding torque Mi corresponding to each time point, i = 0, 1, 2---N, Mi = F × Ri; F represents the set winding tension; Ri is the radius of the spool corresponding to the i-th monitoring point; Ri=R0+d×β×i; R0 is the radius of the yarn spool at the start of winding; d is the diameter of the single filament; β is a fixed value between 1 and 50; During the monofilament winding process, the winding torque of the motor is set to Mi according to the time point ti; The monofilament winding speed V is set according to the monofilament specifications, and the time point ti is obtained by the following formula. ti = L × αi ÷ V ti represents the time point corresponding to the i-th monitoring point; L is the total length of the monofilament winding; V is the set winding speed; αi is the length coefficient of the i-th monitoring point; αi=(R0+R1+---+Ri)÷(R0+R1+---+Rn), where, R0 is the radius of the yarn spool at the start of winding; Rn is the radius of the yarn drum at the end of winding; Ri is the radius of the spool corresponding to the i-th monitoring point.

2. The method for preparing and winding monofilaments according to claim 1, characterized in that, The monofilament winding speed V remains constant from the start of winding to the end of winding.

3. A method for preparing and winding monofilaments according to claim 1 or 2, characterized in that, The N monitoring points are obtained by the following formula. N=(Rn - R0)÷(d×β), R0 is the radius of the yarn spool at the start of winding; Rn is the radius of the yarn drum at the end of winding; d is the diameter of the monofilament; β is a fixed value between 1 and 50.

4. A method for preparing and winding monofilaments according to claim 1 or 2, characterized in that, During the monofilament winding process, at each time point ti, the input voltage of the motor is set according to the winding torque Mi, thereby setting the winding torque of the motor to Mi accordingly.

5. A method for preparing and winding monofilaments according to claim 1 or 2, characterized in that, The set monofilament winding tension F remains constant from the start of winding to the end of winding.

6. A method for preparing and winding monofilaments according to claim 1 or 2, characterized in that, The β is a fixed value between 1 and 10.

7. A method for preparing and winding monofilaments according to claim 1 or 2, characterized in that, The β is a fixed value between 10 and 20.

8. A method for preparing and winding monofilaments according to claim 1 or 2, characterized in that, The β is a fixed value between 20 and 40.