Monofilament preparation and winding method

Abstract

The invention discloses a monofilament preparation and winding method, and aims to provide the monofilament preparation and winding method which can effectively improve the stability of monofilament winding tension in the monofilament winding process, can avoid too tight winding of inner-layer filaments, and can also avoid the problems of looseness, sagging and difficulty in normal winding in the monofilament winding process. The method comprises the following steps: setting monofilament winding tension F according to monofilament specifications; a motor is adopted to drive a winding shaft to rotate to wind monofilaments, and a control method for the winding torque of the motor comprises the following steps that one monitoring point is set every time the radius of a filament cylinder is increased by d * beta from winding starting to ending, and N monitoring points are set in total; setting a time point ti corresponding to each monitoring point, i = 0, 1, 2--N; winding moments Mi corresponding to the time points are set, i = 0, 1, 2--N, and Mi = F * Ri; ri is the radius of the wire cylinder corresponding to the ith monitoring point; ri = R0 + d * beta * i; in the monofilament winding process, the winding torque of the motor is correspondingly set to be Mi according to the time point ti.

Description

Technical Field

[0001] The invention relates to the technical field of monofilament preparation, and in particular to a monofilament preparation and winding method. Background Art

[0002] In the field of material preparation technology, the preparation of plastic monofilaments is an important link. The preparation process of plastic monofilaments usually includes melting, metering, extrusion, cold water setting, drawing, high temperature setting and winding. Among them, the winding step is to wind the plastic monofilaments after drawing and high temperature setting on the wire drum to form the final product. In this process, the size and uniformity of the monofilament winding tension are important factors affecting the performance of the wire.

[0003] The current monofilament winding method is as follows: a motor is used to drive the winding shaft to rotate to wind the monofilament. During this process, the motor applies a constant winding torque to the winding shaft to drive the winding drum to wind. There are several major problems with the existing winding method. According to the relationship between the winding torque output by the motor and the winding tension and the radius of the wire drum, M=F*R, where M is the winding torque output by the motor, R is the radius of the wire drum, and F is the winding tension of the monofilament; Since the monofilament winding method adopts a constant winding torque, that is, the winding torque M remains unchanged from the beginning to the end of winding; and the wire drum radius R is gradually increasing from the beginning to the end of winding (the rate of increase of the wire drum radius R is not uniform); therefore, the winding tension of the monofilament is uneven during the winding process. When the winding starts, the radius of the wire drum is the smallest, and the winding tension of the monofilament is at its maximum; when the winding ends, the radius of the wire drum reaches its maximum, and the winding tension of the monofilament is at its minimum; in this way, in order to ensure that the monofilament does not sag in the later stage of winding, the motor winding torque needs to be set to a larger value. If the winding torque is set to a larger value, the inner layer of the wire is easily wound too tightly, which is not conducive to the smooth withdrawal of the wire during subsequent warping and weaving, and may cause problems such as broken ends; In order to avoid the problem that the inner layer of yarn is too tight, which is not conducive to the smooth withdrawal of the yarn during subsequent warping and weaving, the motor winding torque needs to be set to a smaller value. If the winding torque is set to a smaller value, the single yarn will easily sag and become difficult to wind normally during the process. Summary of the invention

[0004] The purpose of the present invention is to provide a method for preparing and winding a monofilament, which can effectively improve the stability of the monofilament winding tension during the monofilament winding process, avoid the inner layer of the monofilament from being wound too tightly, and avoid the problem of loosening and sagging in the monofilament process and difficulty in normal winding, thereby improving the quality and performance of the monofilament winding.

[0005] The technical solution of the present invention is: A method for preparing and winding a monofilament comprises the following steps: Set the monofilament winding tension F according to the monofilament specifications; The motor is used to drive the winding shaft to rotate to wind up the monofilament. The control method of the motor winding torque in this process is as follows: a monitoring point is set for each increase of d×β in the radius of the winding drum from the beginning of winding to the end of winding, and a total of N monitoring points are set; 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 wire tube corresponding to the i-th monitoring point; Ri=R0+d×β×i, where R0 is the radius of the wire tube when winding begins; d is the diameter of the single filament; β is a fixed value between 1 and 50; During the winding process of the monofilament, the winding torque of the motor is set to Mi according to the time point ti. In a monofilament preparation and winding method of the present scheme, during the winding process of the monofilament, the winding torque of the motor is set to Mi according to the time point ti, and the winding torque Mi is set according to the actual wire drum radius corresponding to each time point in the winding process, and it increases synchronously with the increase of the wire drum radius to offset the decrease in the winding tension of the monofilament caused by the increase of the wire drum radius, so that the winding tension of the monofilament is controlled within a set range with small fluctuations during the entire winding process, effectively improving the stability of the winding tension of the monofilament during the winding process, which can avoid the inner layer of the wire from being wound too tightly, and can avoid the problem of slack and sagging in the monofilament process and difficulty in normal winding, thereby improving the quality and performance of the monofilament winding.

[0006] Preferably, the monofilament winding speed V is set according to the monofilament specification, and the time point ti is obtained by the following formula: ti=L×αi÷V ti is the time point corresponding to the i-th monitoring point; L is the total length of the monofilament winding; V is the set winding line speed; αi is the length coefficient of the ith monitoring point; αi=(R0+R1+---+Ri)÷(R0+R1+---+Rn), where, R0 is the radius of the wire tube when winding begins; Rn is the radius of the wire drum at the end of winding; Ri is the radius of the wire drum corresponding to the ith monitoring point. Since the time point ti in this embodiment is calculated and set by the above formula (the calculation formula of the time point ti is calculated by L the total length of the single-filament winding, V the winding line speed set and αi the length coefficient of the ith monitoring point), the time point ti corresponding to each monitoring point can be accurately determined; then, the winding torque Mi corresponding to each monitoring point is calculated by the formula of the winding torque Mi through the single-filament winding tension set by F and the wire drum radius corresponding to the ith monitoring point Ri; so that it can find the time point and the corresponding winding torque Mi at each monitoring point, and set the winding torque of the motor to Mi. There is no need to set sensor detection during the whole process (effectively avoiding the influence of equipment beating and sensor detection accuracy), thereby further improving the stability of the winding tension of the single-filament during the whole winding process, and further improving the quality and performance of the single-filament winding.

[0007] Preferably, the monofilament winding line speed V remains unchanged from the beginning of winding to the end of winding.

[0008] As a preferred method, N monitoring points are obtained as follows: N=(Rn-R0)÷(d×β), R0 is the radius of the wire tube when winding begins; Rn is the radius of the wire 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 is, the more monitoring points there are, and the more monitoring points there are, the more conducive it is to improving the stability of the winding tension of the monofilament during the entire winding process; and the larger the β value is, the fewer monitoring points there are, which is conducive to reducing the control difficulty and facilitating actual operation.

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

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

[0011] Preferably, β is a fixed value between 1 and 10. In this solution, the β value is set to be smaller, so that more monitoring points are added. The more monitoring points there are, the more conducive it is to improving the stability of the winding tension of the monofilament during the entire winding process.

[0012] Preferably, β is a fixed value between 10 and 20. The smaller the β value is, the more monitoring points there are, and the more monitoring points there are, the more conducive it is to improving the stability of the winding tension of the monofilament during the entire winding process; and the larger the β value is, the fewer monitoring points there are, which is conducive to reducing the control difficulty and facilitating actual control; based on this, this solution sets β to a fixed value between 10 and 20, which can avoid the β value being too small and the monitoring points being too many, thereby increasing the control difficulty; on the other hand, it can avoid the β value being too large and the monitoring points being too few, thereby affecting the stability of the winding tension of the monofilament during the winding process.

[0013] Preferably, β is a fixed value between 20 and 40. In this solution, the β value is set to be relatively large to reduce the number of monitoring points, which is conducive to reducing the control difficulty and facilitating actual control.

[0014] The beneficial effects of the present invention are: the winding tension of the monofilament can be controlled within a set range with small fluctuations during the entire winding process, effectively improving the stability of the winding tension of the monofilament during the winding process, which can avoid the inner layer of the wire from being wound too tightly, and can also avoid the problem of slack and sagging in the monofilament process, making it difficult to wind it normally, thereby improving the quality and performance of the monofilament winding. DETAILED DESCRIPTION

[0015] The present invention is further described in detail below in conjunction with specific embodiments: Specific embodiment 1, a method for preparing and winding a monofilament, comprising the following steps: The monofilament winding tension F is set according to the monofilament specifications.

[0016] The motor is used to drive the winding shaft of the wire drum to rotate to wind up the monofilament. The control method of the motor winding torque in this process is as follows: From the beginning to the end of winding, a monitoring point is set for each increase of d×β in the radius of the wire drum, and a total of N monitoring points are set. d is the diameter of the single wire; β is a fixed value between 1 and 50 (the fixed value is an integer). During the winding process of the single wire, the radius of the wire drum increases by d for each layer of the wire drum. From the beginning to the end of winding, a monitoring point is set for each increase of d×β in the radius of the wire drum, which is equivalent to setting a monitoring point for each β layer of the wire drum from the beginning to the end of winding.

[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 wire tube corresponding to the i-th monitoring point.

[0020] Ri=R0+d×β×i.

[0021] R0 is the radius of the wire tube when winding begins; d is the diameter of the monofilament; i = 0, 1, 2 --- N; β is a fixed value between 1 and 50 (the fixed value is an integer). In this embodiment, β in each formula has the same value.

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

[0023] Compared with the prior art that adopts constant torque to wind up the monofilament, there is the problem that "in order to ensure that the monofilament does not relax and sag in the later stage of winding, the motor winding torque needs to be set to a larger one. If the winding torque is set to a larger one, the inner layer of the yarn is easily wound too tightly, which is not conducive to the smooth withdrawal of the yarn during subsequent warping and weaving, and may cause problems such as broken ends; in order to avoid the problem that the inner layer of the yarn is wound too tightly, which is not conducive to the smooth withdrawal of the yarn during subsequent warping and weaving, the motor winding torque needs to be set to a smaller one. If the winding torque is set to a smaller one, the monofilament is easily loose and drooped during the process, and it is difficult to wind normally. "; in a method for preparing and winding monofilaments of this embodiment, during the monofilament winding process, According to the time point ti, the winding torque of the motor is set to Mi, and the winding torque Mi is set according to the actual wire drum radius corresponding to each time point in the winding process, and increases synchronously with the increase of the wire drum radius to offset the decrease in the single-filament winding tension caused by the increase in the wire drum radius, thereby controlling the winding tension of the single filament within a set range with smaller fluctuations during the entire winding process, effectively improving the stability of the winding tension of the single filament during the winding process (achieving constant tension winding), which can avoid the inner layer of the wire from being wound too tightly, and avoid the problem of slack and sagging in the single filament process, making it difficult to wind it normally, thereby improving the quality and performance of the single filament roll, which is beneficial to subsequent processing and use.

[0024] Specific embodiment 2, a method for preparing and winding a monofilament, comprising the following steps: (i) Setting the monofilament winding tension F and the monofilament winding line speed V according to the monofilament specifications. In this embodiment, the monofilament winding tension F is set to remain unchanged from the beginning of winding to the end of winding. The monofilament winding line speed V remains unchanged from the beginning of winding to the end of winding.

[0025] (ii) A motor is used to drive the winding shaft to rotate to wind up the monofilament. The control method of the motor winding torque in this process is as follows: Step 1, from the beginning of winding to the end of winding, a monitoring point is set for each increase of d×β in the radius of the wire drum, and a total of N monitoring points are set.

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

[0027] During the winding process of the single filament, the radius of the filament increases by d for each winding layer of the filament tube. From the beginning to the end of winding, a monitoring point is set for each increase of d×β in the radius of the filament tube, which is equivalent to setting a monitoring point for each β winding layer of the filament tube from the beginning to the end of winding.

[0028] Step 2: Set the time point ti corresponding to each monitoring point, i = 0, 1, 2---N; ti=L×αi÷V ti is the time point corresponding to the i-th monitoring point; L is the total length of the monofilament winding; V is the set winding line speed; αi is the length coefficient of the ith monitoring point; αi=(R0+R1+---+Ri)÷(R0+R1+---+Rn), where, R0 is the radius of the wire tube when winding begins; Rn is the radius of the wire drum at the end of winding; Ri is the radius of the wire drum corresponding to the ith monitoring point. By calculating the set time point ti through 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 wire tube corresponding to the i-th monitoring point; Ri=R0+d×β×i, where R0 is the radius of the wire tube when winding begins; d is the diameter of the monofilament; β is a fixed value between 1 and 50 (the fixed value is an integer).

[0030] In this embodiment, the value of β in each formula is the same.

[0031] Step 4: During the winding process of the single wire, the winding torque of the motor is set to Mi according to each time point ti. That is, during the winding process of the single wire, 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; at time point ti, the winding torque of the motor is set to Mi.

[0032] Compared with the prior art that adopts constant torque to wind up the monofilament, there is the problem that "in order to ensure that the monofilament does not relax and sag in the later stage of winding, the motor winding torque needs to be set to a larger one. If the winding torque is set to a larger one, the inner layer of the yarn is easily wound too tightly, which is not conducive to the smooth withdrawal of the yarn during subsequent warping and weaving, and may cause problems such as broken ends; in order to avoid the problem that the inner layer of the yarn is wound too tightly, which is not conducive to the smooth withdrawal of the yarn during subsequent warping and weaving, the motor winding torque needs to be set to a smaller one. If the winding torque is set to a smaller one, the monofilament is easily loose and drooped during the process, and it is difficult to wind normally. "; in a method for preparing and winding monofilaments of this embodiment, during the monofilament winding process, According to the time point ti, the winding torque of the motor is set to Mi, and the winding torque Mi is set according to the actual wire drum radius corresponding to each time point in the winding process, and increases synchronously with the increase of the wire drum radius to offset the decrease in the single-filament winding tension caused by the increase in the wire drum radius, thereby controlling the winding tension of the single filament within a set range with smaller fluctuations during the entire winding process, effectively improving the stability of the winding tension of the single filament during the winding process (achieving constant tension winding), which can avoid the inner layer of the wire from being wound too tightly, and avoid the problem of slack and sagging in the single filament process, making it difficult to wind it normally, thereby improving 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 by the above formula (the calculation formula of the time point ti is calculated by L the total length of the single-filament winding, V the winding line speed set, and αi is 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 corresponding to each monitoring point is calculated by the formula of the winding torque Mi through the single-filament winding tension set by F and the wire drum radius corresponding to the i-th monitoring point Ri; thereby, it is possible to find the time point and the corresponding winding torque Mi at each monitoring point, and set the winding torque of the motor to Mi. There is no need to set sensor detection during the entire process (effectively avoiding the influence of equipment vibration and sensor detection accuracy), thereby further improving the stability of the winding tension of the single filament during the entire winding process, and further improving the quality and performance of the single filament roll.

[0034] In addition, in this embodiment, β is a fixed value between 1 and 10. The β value is set to be smaller, so that the number of monitoring points increases. The more monitoring points there are, the more conducive it is to improving the stability of the winding tension of the monofilament during the entire winding process and reducing the fluctuation range of the monofilament winding tension.

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

[0036] Specific embodiment 3, a method for preparing and winding a monofilament, comprising the following steps: (i) Setting the monofilament winding tension F and the monofilament winding line speed V according to the monofilament specifications. In this embodiment, the monofilament winding tension F is set to remain unchanged from the beginning of winding to the end of winding. The monofilament winding line speed V remains unchanged from the beginning of winding to the end of winding.

[0037] (ii) A motor is used to drive the winding shaft to rotate to wind up the monofilament. The control method of the motor winding torque in this process is as follows: Step 1, from the beginning of winding to the end of winding, a monitoring point is set for each increase of d×β in the radius of the wire drum, and a total of N monitoring points are set.

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

[0039] During the winding process of the single filament, the radius of the filament increases by d for each winding layer of the filament tube. From the beginning to the end of winding, a monitoring point is set for each increase of d×β in the radius of the filament tube, which is equivalent to setting a monitoring point for each β winding layer of the filament tube from the beginning to the end of winding.

[0040] Step 2: Set the time point ti corresponding to each monitoring point, i = 0, 1, 2---N; ti=L×αi÷V ti is the time point corresponding to the i-th monitoring point; L is the total length of the monofilament winding; V is the set winding line speed; αi is the length coefficient of the ith monitoring point; αi=(R0+R1+---+Ri)÷(R0+R1+---+Rn), where, R0 is the radius of the wire tube when winding begins; Rn is the radius of the wire drum at the end of winding; Ri is the radius of the wire drum corresponding to the ith monitoring point. By calculating the set time point ti through 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 wire tube corresponding to the i-th monitoring point; Ri=R0+d×β×i, where R0 is the radius of the wire tube when winding begins; d is the diameter of the monofilament; β is a fixed value between 1 and 50 (the fixed value is an integer).

[0042] In this embodiment, the value of β in each formula is the same.

[0043] Step 4: During the winding process of the single wire, the winding torque of the motor is set to Mi according to each time point ti. That is, during the winding process of the single wire, 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; at time point ti, the winding torque of the motor is set to Mi.

[0044] Compared with the prior art that adopts constant torque to wind up the monofilament, there is the problem that "in order to ensure that the monofilament does not relax and sag in the later stage of winding, the motor winding torque needs to be set to a larger one. If the winding torque is set to a larger one, the inner layer of the yarn is easily wound too tightly, which is not conducive to the smooth withdrawal of the yarn during subsequent warping and weaving, and may cause problems such as broken ends; in order to avoid the problem that the inner layer of the yarn is wound too tightly, which is not conducive to the smooth withdrawal of the yarn during subsequent warping and weaving, the motor winding torque needs to be set to a smaller one. If the winding torque is set to a smaller one, the monofilament is easily loose and drooped during the process, and it is difficult to wind normally. "; in a method for preparing and winding monofilaments of this embodiment, during the monofilament winding process, According to the time point ti, the winding torque of the motor is set to Mi, and the winding torque Mi is set according to the actual wire drum radius corresponding to each time point in the winding process, and increases synchronously with the increase of the wire drum radius to offset the decrease in the single-filament winding tension caused by the increase in the wire drum radius, thereby controlling the winding tension of the single filament within a set range with smaller fluctuations during the entire winding process, effectively improving the stability of the winding tension of the single filament during the winding process (achieving constant tension winding), which can avoid the inner layer of the wire from being wound too tightly, and avoid the problem of slack and sagging in the single filament process, making it difficult to wind it normally, thereby improving 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 by the above formula (the calculation formula of the time point ti is calculated by L the total length of the single-filament winding, V the winding line speed set, and αi is 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 corresponding to each monitoring point is calculated by the formula of the winding torque Mi through the single-filament winding tension set by F and the wire drum radius corresponding to the i-th monitoring point Ri; thereby, it is possible to find the time point and the corresponding winding torque Mi at each monitoring point, and set the winding torque of the motor to Mi. There is no need to set sensor detection during the entire process (effectively avoiding the influence of equipment vibration and sensor detection accuracy), thereby further improving the stability of the winding tension of the single filament during the entire winding process, and further improving the quality and performance of the single filament roll.

[0046] In addition, in this embodiment, β is a fixed value between 10 and 20. The smaller the β value is, the more monitoring points there are, and the more monitoring points there are, the more conducive it is to improving the stability of the winding tension of the monofilament during the entire winding process; and the larger the β value is, the fewer monitoring points there are, which is conducive to reducing the control difficulty and facilitating actual control; based on this, this embodiment sets β to a fixed value between 10 and 20, which can avoid the β value being too small and the monitoring points being too many, thereby increasing the control difficulty; on the other hand, it can avoid the β value being too large and the monitoring points being too few, thereby affecting the stability of the winding tension of the monofilament during the winding process.

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

[0048] Specific embodiment 4, a method for preparing and winding a monofilament, comprising the following steps: (i) Setting the monofilament winding tension F and the monofilament winding line speed V according to the monofilament specifications. In this embodiment, the monofilament winding tension F is set to remain unchanged from the beginning of winding to the end of winding. The monofilament winding line speed V remains unchanged from the beginning of winding to the end of winding.

[0049] (ii) A motor is used to drive the winding shaft to rotate to wind up the monofilament. The control method of the motor winding torque in this process is as follows: Step 1, from the beginning of winding to the end of winding, a monitoring point is set for each increase of d×β in the radius of the wire drum, and a total of N monitoring points are set.

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

[0051] During the winding process of the single filament, the radius of the filament increases by d for each winding layer of the filament tube. From the beginning to the end of winding, a monitoring point is set for each increase of d×β in the radius of the filament tube, which is equivalent to setting a monitoring point for each β winding layer of the filament tube from the beginning to the end of winding.

[0052] Step 2: Set the time point ti corresponding to each monitoring point, i = 0, 1, 2---N; ti=L×αi÷V ti is the time point corresponding to the i-th monitoring point; L is the total length of the monofilament winding; V is the set winding line speed; αi is the length coefficient of the ith monitoring point; αi=(R0+R1+---+Ri)÷(R0+R1+---+Rn), where, R0 is the radius of the wire tube when winding begins; Rn is the radius of the wire drum at the end of winding; Ri is the radius of the wire drum corresponding to the ith monitoring point. By calculating the set time point ti through 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 wire tube corresponding to the i-th monitoring point; Ri=R0+d×β×i, where R0 is the radius of the wire tube when winding begins; d is the diameter of the monofilament; β is a fixed value between 1 and 50 (the fixed value is an integer).

[0054] In this embodiment, the value of β in each formula is the same.

[0055] Step 4: During the winding process of the single wire, the winding torque of the motor is set to Mi according to each time point ti. That is, during the winding process of the single wire, 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; at time point ti, the winding torque of the motor is set to Mi.

[0056] Compared with the prior art that adopts constant torque to wind up the monofilament, there is the problem that "in order to ensure that the monofilament does not relax and sag in the later stage of winding, the motor winding torque needs to be set to a larger one. If the winding torque is set to a larger one, the inner layer of the yarn is easily wound too tightly, which is not conducive to the smooth withdrawal of the yarn during subsequent warping and weaving, and may cause problems such as broken ends; in order to avoid the problem that the inner layer of the yarn is wound too tightly, which is not conducive to the smooth withdrawal of the yarn during subsequent warping and weaving, the motor winding torque needs to be set to a smaller one. If the winding torque is set to a smaller one, the monofilament is easily loose and drooped during the process, and it is difficult to wind normally. "; in a method for preparing and winding monofilaments of this embodiment, during the monofilament winding process, According to the time point ti, the winding torque of the motor is set to Mi, and the winding torque Mi is set according to the actual wire drum radius corresponding to each time point in the winding process, and increases synchronously with the increase of the wire drum radius to offset the decrease in the single-filament winding tension caused by the increase in the wire drum radius, thereby controlling the winding tension of the single filament within a set range with smaller fluctuations during the entire winding process, effectively improving the stability of the winding tension of the single filament during the winding process (achieving constant tension winding), which can avoid the inner layer of the wire from being wound too tightly, and avoid the problem of slack and sagging in the single filament process, making it difficult to wind it normally, thereby improving 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 by the above formula (the calculation formula of the time point ti is calculated by L the total length of the single-filament winding, V the winding line speed set, and αi is 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 corresponding to each monitoring point is calculated by the formula of the winding torque Mi through the single-filament winding tension set by F and the wire drum radius corresponding to the i-th monitoring point Ri; thereby, it is possible to find the time point and the corresponding winding torque Mi at each monitoring point, and set the winding torque of the motor to Mi. There is no need to set sensor detection during the entire process (effectively avoiding the influence of equipment vibration and sensor detection accuracy), thereby further improving the stability of the winding tension of the single filament during the entire winding process, and further improving the quality and performance of the single filament roll.

[0058] In addition, in this embodiment, β is a fixed value between 20 and 40. This solution sets the β value to be relatively large to reduce the number of monitoring points, which is conducive to reducing the control difficulty and facilitating actual control.

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

[0060] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent transformation made to the above embodiment based on the technical essence of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A method for preparing and winding a monofilament, characterized in that: The following steps are involved: Set the monofilament winding tension F according to the monofilament specifications; The motor is used to drive the winding shaft to rotate to wind up the monofilament. The control method of the motor winding torque is as follows: From the beginning of winding to the end, a monitoring point is set for each increase of d×β in the radius of the wire package, and a total of N monitoring points are set; 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 wire tube corresponding to the i-th monitoring point; Ri=R0+d×β×i; R0 is the radius of the wire tube when winding begins; d is the diameter of the single filament; β is a fixed value between 1 and 50; During the winding process of the single filament, the winding torque of the motor is set to Mi according to the time point ti.

2. A method for preparing and winding a monofilament according to claim 1, characterized in that: The monofilament winding speed V is set according to the monofilament specification, and the time point ti is obtained by the following formula: ti=L×αi÷V ti is the time point corresponding to the i-th monitoring point; L is the total length of the monofilament winding; V is the set winding line speed; αi is the length coefficient of the ith monitoring point; αi=(R0+R1+---+Ri)÷(R0+R1+---+Rn), where, R0 is the radius of the wire tube when winding begins; Rn is the radius of the wire drum at the end of winding; Ri is the radius of the wire tube corresponding to the i-th monitoring point.

3. A method for preparing and winding a monofilament according to claim 2, characterized in that: The monofilament winding line speed V remains unchanged from the beginning of winding to the end of winding.

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

5. A method for preparing and winding a monofilament according to claim 1, 2 or 3, characterized in that: During the winding process of the single filament, at each time point ti, the input voltage of the motor is set according to the winding torque Mi, so that the winding torque of the motor is correspondingly set to Mi.

6. A method for preparing and winding a monofilament according to claim 1, 2 or 3, characterized in that: The set monofilament winding tension F remains unchanged from the beginning of winding to the end of winding.

7. A method for preparing and winding a monofilament according to claim 1, 2 or 3, characterized in that: The β is a fixed value between 1 and 10.

8. A method for preparing and winding a monofilament according to claim 1, 2 or 3, characterized in that: The β is a fixed value between 10-20.

9. A method for preparing and winding a monofilament according to claim 1, 2 or 3, characterized in that: The β is a fixed value between 20-40.