CN110552088B - Three-strand direct twisting machine and method for directly twisting three-strand silk into thread - Google Patents
Three-strand direct twisting machine and method for directly twisting three-strand silk into thread Download PDFInfo
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- CN110552088B CN110552088B CN201910744912.2A CN201910744912A CN110552088B CN 110552088 B CN110552088 B CN 110552088B CN 201910744912 A CN201910744912 A CN 201910744912A CN 110552088 B CN110552088 B CN 110552088B
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
- D01H1/14—Details
- D01H1/20—Driving or stopping arrangements
- D01H1/22—Driving or stopping arrangements for rollers of drafting machines; Roller speed control
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
- D01H1/14—Details
- D01H1/20—Driving or stopping arrangements
- D01H1/24—Driving or stopping arrangements for twisting or spinning arrangements, e.g. spindles
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H13/00—Other common constructional features, details or accessories
- D01H13/10—Tension devices
- D01H13/108—Regulating tension by regulating speed of driving mechanisms of unwinding, paying-out, forwarding, winding or depositing devices, e.g. automatically in response to variations in tension
Abstract
The invention provides a three-strand direct twisting machine and a method for directly twisting three strands of yarns into threads, wherein the three-strand direct twisting machine comprises two twisting spindle positions and three twisting spindle positions, two twisting yarns twisted by the two twisting spindle positions are wound on a first overfeeding assembly for n circles and then are conveyed to an outer yarn long pipe of the three twisting spindle positions through a yarn guide device, and then are conveyed to the three twisting spindle positions to form a three-strand twisting outer yarn balloon, and are twisted with three-strand twisting inner yarns to form three-strand twisting yarns which are conveyed to a finished product package; the size of the three-ply twisted outer yarn balloon is controlled by the overfeed speed of the first overfeed assembly. The invention overcomes the interference of the speed of the overfeed component to the air ring shape of the three-strand twisted outer yarn in the prior art, can obtain stable energy-saving small air rings, can independently adjust the speed of conveying the twisted yarns of the first overfeed component and the second overfeed component, is matched with the winding speed of the three-strand twisted yarns, obtains ideal package density, and improves the package quality of finished products.
Description
Technical Field
The invention relates to the field of direct twisting machines, in particular to a three-strand direct twisting machine and a method for directly twisting three-strand silk into a thread.
Background
The three-strand straight twisting machine is mainly used for the industries of producing tire cords, industrial filter cloth, high-quality carpets and the like. In a method and a twisting device for directly twisting three-ply yarns into a thread disclosed in chinese patent document CN101429693B, two spindles form a station to realize one-time twisting of three-ply yarns, both spindles provide damping torque by an electromagnetic tensioner to control wrap angles of a yarn storage disc to ensure stable air rings, two spindle capstan overfeeding devices share a driving shaft, and linear speeds of two spindle overfeeding and winding are consistent.
It is known from the prior art of energy saving from chinese patent document CN107829181A that the tension of the outer yarn is increased by actively controlling the yarn feeding speed by a motor, and the balloon is contracted to obtain a smaller-diameter balloon, thereby reducing the energy consumption. The technology adopts an electric tensioner to control the yarn feeding speed to obtain a stable small balloon, but the technology can only be applied to the energy saving of two straight twists. In the process of attempting to be applied to three-strand straight twisting energy saving, the overfeeding rotating speed of a winch at the three-strand twisting position is the same as that at the two-strand twisting position, so that the speed is too high and cannot be independently adjusted, and a stable small balloon cannot be obtained.
When the three-strand straight twisting machine is used for threading and spinning-in, the large overfeed roller of the winch needs to be flexibly started and stopped, the electromagnetic clutch is adopted in the prior art to realize the on-off of transmission, the friction plate and the electromagnetic armature are attached by the pressure of the spring to transmit torque, the friction plate is abraded and thinned due to the fact that relative sliding occurs in the using process, the gap between the electromagnet and the armature gradually becomes larger than the limit of the actuation distance, and the large overfeed roller can not be braked easily.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a three-strand straight twisting machine and a three-strand silk direct twisting and forming method, which can conveniently control the diameter of a three-strand twisted outer yarn balloon at a three-strand twisting spindle position to be optimal, stabilize the diameter and tension of the three-strand twisted outer yarn balloon, obviously reduce the energy consumption of the conventional three-strand straight twisting machine and reduce the noise; in the preferred scheme, when three strands of yarn are twisted and threaded for spinning, the overfeed device can be flexibly started and stopped, so that the service life of the driving motor is prolonged.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a three-strand straight twisting machine comprises two twisting positions and three twisting positions, wherein two twisting yarns twisted at the two twisting positions are wound on a first overfeeding assembly for n circles and then are conveyed to an outer yarn long pipe at the three twisting positions through a yarn guide device, and the yarn guide device comprises a plurality of groups of guide wheels; then the yarn is conveyed to a three-strand twisting assembly to form a three-strand twisting outer yarn balloon, the three-strand twisting outer yarn balloon and the three-strand twisting inner yarn are twisted into three-strand twisted yarn, the three-strand twisted yarn is wound into a finished product package driven by a winding roller through a second overfeeding assembly and a traversing yarn guide in sequence, and the finished product package is conveyed to the finished product package;
the size of the three-ply twisted outer yarn balloon is controlled by the overfeed speed of the first overfeed assembly.
In a preferred scheme, the first overfeed assembly comprises a large overfeed roller connected with a driving device and a follow-up small overfeed roller, and two twisted yarns are sequentially wound on the large overfeed roller and the small overfeed roller for n circles.
In the preferred scheme, the large overfeed roller is connected with a motor through a speed reducing mechanism;
the small overfeed roller is connected with a damping device, and the damping device comprises one of a hysteresis damper, a liquid medium damper, a friction damper, a magneto-rheological fluid damper or a motor damper.
In the preferred scheme, an included angle which is larger than 0 degree is formed between the axes of the large overfeed roller and the small overfeed roller;
the distance between the free ends of the large overfeed roller and the small overfeed roller is increased compared with the distance between the free ends of the large overfeed roller and the small overfeed roller.
In the preferred scheme, a host control unit is further arranged and is electrically connected with a twisting component driving unit, and the twisting component driving unit is used for independently driving the rotating speeds of the two-strand twisting component and the three-strand twisting component;
the main machine control unit is also electrically connected with the two ingot position control cards, and one of the two ingot position control cards controls the wire conveying speed of the first overfeeding assembly through a first series of drivers; the other spindle position control card controls the wire conveying speed of the second overfeeding assembly through a second series of drivers.
In the preferred scheme, a sensing device is further arranged and used for monitoring spindle current or the diameter of the balloon, the sensing device is electrically connected with the host control unit, and the wire feeding speed of the first overfeeding assembly and the wire feeding speed of the second overfeeding assembly are controlled by feedback of the sensing device;
the yarn feeding speed of the first overfeeding assembly controls the diameter of the balloon of the three-ply twisted outer yarn.
In a preferred scheme, a first yarn tensioning device is arranged before the working procedure of the two-strand twisting assembly of the two-strand twisting position, and the diameter of the balloon of the two-strand twisted outer yarn is controlled by the yarn conveying speed of the first yarn tensioning device;
the second yarn tensioning device is arranged before the working procedure of the three-strand twisting assembly of the three-strand twisting spindle position, and the diameter of the balloon of the three-strand twisted outer yarn is controlled by the yarn conveying speed of the second yarn tensioning device.
In a preferred scheme, the thread conveying speed of the first overfeeding assembly is higher than that of the second overfeeding assembly.
A three-strand silk direct twisting and forming method adopting the three-strand direct twisting machine comprises the following steps:
s1, feeding single-strand precursor yarns to two twisting positions, throwing out precursor yarns serving as outer yarns by a high-speed rotating two twisting components to form two twisting outer yarn balloon rings, and twisting the outer yarn balloon rings and the two twisting inner yarns at the two twisting positions to form two twisting yarns;
s2, after winding the two twisted yarns on the first overfeed assembly for n circles, conveying the two twisted yarns to three twisting positions through a yarn guide device comprising a plurality of groups of guide wheels;
s3, feeding two twisted yarns into a three-strand twisting assembly from an outer yarn long pipe of the three-strand twisting position as an outer yarn of the three-strand twisting position, and throwing the two twisted yarns out by the three-strand twisting assembly to form a three-strand twisting outer yarn balloon;
s4, twisting the three-ply outer yarn balloon and the three-ply inner yarn at the three-ply twisting spindle position into three-ply twisted yarn;
s5, winding the three-ply twisted yarn into a finished product package driven by a winding roller through a second overfeeding assembly and a traversing yarn guide in sequence;
the diameter of the three-ply twisted outer yarn balloon is adjusted by adjusting the rotating speed of the first overfeed assembly;
the three-strand silk is directly twisted into the thread through the steps.
In the preferred scheme, a host control unit is further arranged and respectively sends control parameters to a first ingot position control card and a second ingot position control card, the first ingot position control card controls the speed of the first overfeeding assembly through a first series of drivers, and the second ingot position control card controls the speed of the second overfeeding assembly through a second series of drivers;
the sensing device is electrically connected with the host control unit through the communication module and controls the diameter of the outer yarn balloon to be an energy-saving small balloon through PID closed-loop regulation and to be kept.
Compared with the prior art, the three-strand straight twisting machine and the method for directly twisting the three-strand silk into the thread have the following advantages that:
1. the interference of the speed of the overfeeding assembly to the balloon shape of the three-strand twisted outer yarn in the prior art is overcome, the stable energy-saving small balloon can be obtained, the yarn conveying speeds of the first overfeeding assembly and the second overfeeding assembly can be independently adjusted and are matched with the winding speed of the three-strand twisted yarn, the ideal package density is obtained, and the package quality of a finished product is improved.
2. The two-strand twisting spindle position yarn conveying device and the three-strand twisting spindle position yarn conveying device have the advantages that the speed regulation is independently carried out, the yarn conveying speed regulation precision is greatly improved, the slipping phenomenon between the winch type overfeed roller and the yarn in the prior art is avoided, the balloon is stable and reliable, the abnormal state of yarn splitting of two parallel protofilaments serving as outer yarns due to unequal tension in the twisting process of the three-strand twisted yarns is eliminated, the breakage rate is remarkably reduced, and the equal length of the yarns is ensured.
3. The single motor is adopted to drive the large overfeed roller, the large overfeed roller can be started and stopped independently, and the problem that the large overfeed roller cannot brake due to abrasion of a friction plate in the prior art is solved.
4. The invention adopts an original control mode to adjust the wire conveying speed of two strands of ingot positions in real time, and the natural gas ring of three strands of ingot positions with 70 percent of energy consumption is collected into a small-diameter gas ring, so that the energy consumption can be reduced by 40 percent to the maximum extent, the electric energy consumption is greatly reduced for customers, the workshop noise is reduced, and the service life of equipment is prolonged. Particularly, the control system controls the overfeeding assemblies of the two twisting positions to change the outer yarn tension of the three twisting positions, so that the three twisting positions can obtain a small balloon scheme, the scheme is ingenious, and the three twisting positions can achieve an energy-saving effect.
5. The control system can realize that the yarn conveying speed and the corresponding spindle current value or the diameter value of the balloon form a PID closed loop, so that the balloon is always kept in a small-diameter energy-saving small-balloon state.
Drawings
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
FIG. 1 is a schematic diagram of the stations and the yarn paths of the three-strand straight twisting machine according to the present invention.
FIG. 2 is a schematic view of a single motor driven overfeed assembly of the present invention.
FIG. 3 is a schematic diagram of overfeed control at three twisting stations in the present invention.
FIG. 4 is a schematic view of a large balloon and a small balloon
In the figure: two-strand twisting spindle position 1, three-strand twisting spindle position 2, two-strand twisting and twisting component 3, two-strand twisting outer yarn balloon 4, two-strand twisting inner yarn 5, two-strand twisting yarn 6, first overfeeding component 7, second overfeeding component 8, yarn guide device 9, outer yarn long tube 10, three-strand twisting and twisting component 11, three-strand twisting outer yarn balloon 12, three-strand twisting inner yarn 13, three-strand twisting yarn 14, winding roller 15, traversing yarn guide 16, winding frame 17, finished product package 18, overfeeding box 19, motor support 20, motor 21, driving belt wheel 22, driven belt wheel 23, synchronous belt 24, large overfeeding roller shaft 25, large overfeeding roller 26, small overfeeding roller 27, human-computer interaction interface 28, host computer control unit 29, first spindle position control card 30, first series of drivers 31, second series of drivers 32, sensing device 33, twisting component driving unit 34, atmospheric ring 35, energy-saving small balloon 36 and second spindle position control card 37, a first yarn tensioning device 38, a second yarn tensioning device 39.
Detailed Description
Example 1:
as shown in fig. 1 and 2, a three-strand straight twisting machine comprises two twisting positions 1 and three twisting positions 2, wherein two raw yarns are fed into the two twisting positions 1, one of the raw yarns enters into a two twisting assembly 3 and is thrown out by the two twisting assembly 3 rotating at high speed to form two outer twisting air rings 4, is twisted with a two inner twisting yarn 5, and the two inner twisting yarns 5 twisted by the two twisting positions 1 are wound on a first overfeeding assembly 7 for n circles, are conveyed to an outer long tube yarn 10 of the three twisting positions 2 through a yarn guide device 9, are conveyed to a three twisting assembly 11 to form a three twisting air ring 12, are twisted with a three twisting inner yarn 13 to form a three twisting yarn 14, and are conveyed and wound to a finished package 18 driven to rotate by a winding roller 15 through a traversing yarn guide 16;
the size of the three-ply twisted outer yarn balloon 12 is controlled at the overfeed speed by the first overfeed assembly 7. When the overfeed speed of the first overfeed assembly 7 is faster, i.e. the diameter of the three-ply twist outer yarn balloon 12 is larger, the energy consumption is correspondingly higher. Through the improvement, the energy consumption can be reduced by 40 percent at most.
In a preferred scheme, as shown in fig. 2, the first overfeed assembly 7 comprises a large overfeed roller 26 connected with a driving device and a follow-up small overfeed roller 27, and two twisted yarns 6 are wound on the large overfeed roller 26 and the small overfeed roller 27 in turn for n turns. The diameter of the large overfeed roller 26 is greater than the diameter of the small overfeed roller 27. The number of windings is related to the yarn type.
In a preferred scheme, as shown in fig. 2, the large overfeed roller 26 is connected with the motor 21 through a speed reducing mechanism; the speed reducing mechanism comprises a gear transmission mechanism, a chain transmission mechanism, a synchronous belt transmission mechanism or a belt transmission mechanism. The motor 21 includes an asynchronous variable frequency motor, a stepping motor, a servo motor, or a dc brushless motor. As in the example of fig. 2, the motor 21 is fixedly installed in the overfeed tank 19 through the motor support 20, the shaft of the motor 21 is fixedly connected with the driving pulley 22 with a smaller diameter, the large overfeed roller 26 is fixedly connected with the driven pulley 23 with a larger diameter through the large overfeed roller shaft 25, and the synchronous belt 24 is connected with the driving pulley 22 and the driven pulley 23.
The preferred small overfeed roller 27 is connected to a damping device comprising one of a hysteresis damper, a liquid media damper, a friction damper, a magneto-hydrodynamic damper or an electromechanical damper. In this case, a hysteresis damper or a motor damper is preferably used. In the motor damper, a power generation or electric dual-purpose motor is adopted, and a tension load is formed by torque generated by power generation or applied torque, so that resistance is generated.
The damping means is provided mainly for overcoming the rotational inertia of the large overfeed roller 26 or for damping the rotational speed variations during the speed control, thereby making the thread feeding speed smoother.
In a preferred scheme, the axis of the large overfeed roller 26 and the axis of the small overfeed roller 27 form an included angle of more than 0 degrees; the free ends of the large overfeed roller 26 and the small overfeed roller 27 are at an increased distance from each other. With this structure, the wound yarns can be prevented from rubbing against each other.
In a preferred embodiment, as shown in fig. 3, the host control unit 29 is further electrically connected to two ingot position control cards, one of which controls the feed line speed of the first overfeeding assembly 7 through a first series of drivers 31; the other station control card controls the feed line speed of the second overfeed assembly 8 via a second series of drives 32.
The communication of the host control unit 29 is mainly completed through a communication module, which includes one of a Modbus module, a DP bus module, or a PN bus module.
The twisting unit drive unit 34 is controlled by two frequency converters arranged in the apparatus. The twisting component driving unit 34 of each three-strand twisting station is used for controlling the synchronous operation of the two-strand twisting component 3 and the three-strand twisting component 11 of the station. A first series of drivers 31 and a second series of drivers 32 for driving the first overfeeding assembly 7 of the two-ply twisting station and the second overfeeding assembly 8 of the three-ply twisting station, respectively. The first series of drivers 31 and the second series of drivers 32 are integrated with the motor 21, the first series of drivers 31 and the second series of drivers 32 receive communication data from the first spindle position control card 30 and the second spindle position control card 37 of each spindle position respectively to send an operation instruction to the overfeed assembly, and then the first overfeed assembly 7 of the two-strand spindle position and the second overfeed assembly 8 of the three-strand spindle position are driven respectively, so that the two-strand spindle position 1 and the three-strand spindle position 2 respectively obtain proper line conveying speeds.
In a preferred scheme, a sensing device 33 is further arranged, the sensing device 33 is used for monitoring spindle current or balloon diameter, the sensing device 33 is electrically connected with the main machine control unit 29, and the wire feeding speed of the first overfeeding assembly 7 and the wire feeding speed of the second overfeeding assembly 8 are controlled by feedback of the sensing device 33. The sensing means 33 comprises a current sensor, and the current will typically increase when the balloon is large. When the air ring is smaller, the current is reduced, and the air ring shape is obtained by combining the calculation of data such as yarn materials. The sensing means 33 may also employ an optical sensor for directly measuring the diameter of the balloon.
In a preferred scheme, the yarn feeding speed of the first overfeed assembly 7 controls the diameter of the three-ply twisted outer yarn balloon 12.
In a preferred scheme, as shown in fig. 1, a first yarn tensioning device 38 is arranged before the process of the two twisting assemblies 3 of the two twisting stations 1, and the diameter of the two twisting outer yarn balloons 4 is controlled by the yarn conveying speed of the first yarn tensioning device 38; with the structure, the energy consumption of the two twisting components 3 of the two twisting spindle positions 1 can be reduced.
A second yarn tension device 39 is arranged before the process of the three-strand twisting assembly 11 of the three-strand twisting spindle position 2, and the diameter of the three-strand twisting outer yarn balloon 12 is controlled by the yarn conveying speed of the second yarn tension device 39. Because the diameter of the three-ply twisted outer yarn balloon 12 is related to the yarn conveying speed of the first overfeeding assembly 7 and the second overfeeding assembly 8, and the second overfeeding assembly 8 also needs to control the speed of the winding device for conveying the three-ply twisted yarn 14, the control difficulty is high, the three-ply twisted outer yarn balloon 12 is subjected to auxiliary control through the arranged second yarn tensioning device 39, the diameter of the three-ply twisted outer yarn balloon 12 can be controlled more accurately, and the requirements on energy conservation and the speed for conveying the yarn are met.
In a preferred scheme, the wire conveying speed of the first overfeeding assembly 7 is higher than that of the second overfeeding assembly 8. With the structure, the energy is saved by the small air ring.
The twisting device for directly twisting three-strand silk into a thread utilizes a conventional direct twisting machine, namely two spindle positions in a two-strand direct twisting machine, and realizes three-strand twisting through the control system. The user buys the direct twisting machine, and not only can realize the two-strand direct twisting function, but also can realize the three-strand direct twisting function.
Example 2:
a three-strand silk direct twisting and forming method adopting the three-strand direct twisting machine comprises the following steps:
s1, feeding single-strand precursor yarns into two twisting positions 1, throwing out precursor yarns serving as outer yarns by a two-strand twisting component 3 rotating at a high speed to form two twisting outer yarn balloons 4, and twisting the two twisting inner yarns 5 of the two twisting positions 1 into two twisting yarns 6;
s2, after winding the two twisted yarns 6 on the first overfeed assembly 7 for n circles, conveying the two twisted yarns to the three twisting spindle positions 2 through a yarn guide device 9 comprising a plurality of groups of guide wheels;
s3, feeding two twisted yarns 6 serving as outer yarns of the three-strand twisting spindle position 2 from the outer yarn long pipe 10 of the three-strand twisting spindle position 2 into the three-strand twisting assembly 11, and throwing the two twisted yarns 6 out of the three-strand twisting assembly 11 to form a three-strand twisted outer yarn balloon 12;
s4, twisting the three-ply outer yarn balloon 12 and the three-ply inner yarn 13 of the three-ply twisting spindle position 2 into a three-ply twisted yarn 14;
s5, the three-ply twisted yarn 14 passes through the second overfeed assembly 8 and the traverse yarn guide 16 in sequence and is wound into the finished package 18 driven by the winding roller 15;
the diameter of the three-ply twisted outer yarn balloon 12 is adjusted by adjusting the rotating speed of the first overfeed component 7;
the three-strand silk is directly twisted into the thread through the steps.
The main machine control unit 29 is further arranged, the main machine control unit 29 respectively sends control parameters to the first ingot position control card 30 and the second ingot position control card 37, the first ingot position control card 30 controls the speed of the first overfeeding component 7 through the first series of drivers 31, and the second ingot position control card 37 controls the speed of the second overfeeding component 8 through the second series of drivers 32;
and a sensing device 33 for detecting spindle current or the diameter of the outer yarn balloon is also arranged, the sensing device 33 is electrically connected with the host control unit 29 through a communication module, and the diameter of the outer yarn balloon is controlled to the energy-saving small balloon 36 through PID closed-loop regulation and is kept.
The above-described embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and the scope of the present invention is defined by the claims, and equivalents including technical features described in the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of the invention.
Claims (10)
1. A three-strand straight twisting machine comprises a two-strand twisting position (1) and a three-strand twisting position (2), and is characterized in that: two twisted yarns (6) twisted by the two twisting spindle positions (1) are wound on a first overfeeding assembly (7) for n circles and then are conveyed to an outer yarn long pipe (10) of the three twisting spindle positions (2) through a yarn guide device (9), and the yarn guide device (9) comprises a plurality of groups of guide wheels;
then the yarn is conveyed to a three-strand twisting assembly (11) to form a three-strand twisting outer yarn balloon (12), the yarn and a three-strand twisting inner yarn (13) are twisted into a three-strand twisted yarn (14), and the three-strand twisted yarn (14) sequentially passes through a second overfeeding assembly (8) and a traversing yarn guide (16), is wound into a finished product package (18) driven by a winding roller (15), and is conveyed to the finished product package (18); the size of the three-ply twisted outer yarn balloon (12) is controlled by the overfeed speed of the first overfeed assembly (7).
2. A three-ply straight twisting machine according to claim 1, wherein: the first overfeed assembly (7) comprises a large overfeed roller (26) connected with a driving device and a follow-up small overfeed roller (27), and two twisted yarns (6) are sequentially wound on the large overfeed roller (26) and the small overfeed roller (27) for n circles.
3. A three-ply straight twisting machine according to claim 2, wherein: the large overfeed roller (26) is connected with the motor (21) through a speed reducing mechanism;
the small overfeed roller (27) is connected with a damping device, and the damping device comprises one of a hysteresis damper, a liquid medium damper, a friction damper, a magneto-rheological fluid damper or a motor damper.
4. A three-strand straight twisting machine according to claim 2 or 3, wherein: the axis of the large overfeed roller (26) and the axis of the small overfeed roller (27) form an included angle of more than 0 degree;
the free ends of the large overfeed roller (26) and the small overfeed roller (27) are at an increased distance from each other.
5. A three-strand straight twisting machine according to any one of claims 1 to 3, wherein: the main machine control unit (29) is also arranged, the main machine control unit (29) is electrically connected with the twisting component driving unit (34), and the twisting component driving unit (34) is used for independently driving the rotating speeds of the two-strand twisting component (3) and the three-strand twisting component (11);
the main machine control unit (29) is also electrically connected with the two ingot position control cards, and one of the two ingot position control cards controls the wire conveying speed of the first overfeeding assembly (7) through a first series of drivers (31); the other spindle position control card controls the wire conveying speed of the second overfeeding assembly (8) through a second series of drivers (32).
6. A three-ply straight twisting machine according to claim 5, wherein: the spindle feeding device is also provided with a sensing device (33), the sensing device (33) is used for monitoring spindle current or balloon diameter, the sensing device (33) is electrically connected with the main machine control unit (29), and the feedback of the sensing device (33) controls the wire feeding speed of the first overfeeding assembly (7) and the wire feeding speed of the second overfeeding assembly (8);
the yarn feeding speed of the first overfeed assembly (7) controls the diameter of the three-strand twisted outer yarn balloon (12).
7. A three-ply straight twisting machine according to claim 6, wherein: a first yarn tensioning device (38) is arranged before the working procedures of the two twisting components (3) of the two twisting spindle positions (1), and the diameter of the balloon (4) of the two twisted outer yarns is controlled by the yarn conveying speed of the first yarn tensioning device (38);
a second yarn tensioning device (39) is arranged before the process of the three-strand twisting assembly (11) of the three-strand twisting spindle (2), and the diameter of the three-strand twisting outer yarn balloon (12) is controlled by the yarn conveying speed of the second yarn tensioning device (39).
8. A three-ply straight twisting machine according to claim 6, wherein: the wire feeding speed of the first overfeeding assembly (7) is higher than that of the second overfeeding assembly (8).
9. A method for directly twisting three-ply yarns into a thread by using the three-ply straight twisting machine according to any one of claims 1 to 8, which is characterized by comprising the following steps:
s1, feeding the single strand precursor into two twisting positions (1), throwing out the precursor serving as an outer yarn by a two-strand twisting assembly (3) rotating at a high speed to form two twisting outer yarn balloons (4), and twisting the outer yarn balloons and two twisting inner yarns (5) of the two twisting positions (1) to form two twisting yarns (6);
s2, after winding two twisted yarns (6) on a first overfeed assembly (7) for n circles, conveying the twisted yarns to three twisting spindle positions (2) through a yarn guide device (9) comprising a plurality of groups of guide wheels;
s3, feeding two twisted yarns (6) serving as outer yarns of the three-strand twisting position (2) from an outer yarn long pipe (10) of the three-strand twisting position (2) into a three-strand twisting assembly (11), and throwing the two twisted yarns (6) out by the three-strand twisting assembly (11) to form a three-strand twisting outer yarn balloon (12);
s4, twisting the three-ply outer yarn balloon (12) and the three-ply inner yarn (13) of the three-ply twisting spindle (2) into three-ply twisted yarn (14);
s5, the three-ply twisted yarn (14) sequentially passes through the second overfeed assembly (8) and the traverse yarn guide (16) and is wound into a finished product package (18) driven by a winding roller (15);
the diameter of the three-ply twisted outer yarn balloon (12) is adjusted by adjusting the rotating speed of the first overfeed component (7);
the three-strand silk is directly twisted into the thread through the steps.
10. The method for directly twisting three-ply yarn into yarn as claimed in claim 9, wherein: the main machine control unit (29) is further arranged, the main machine control unit (29) respectively sends control parameters to the first ingot position control card (30) and the second ingot position control card (37), the first ingot position control card (30) controls the speed of the first overfeeding assembly (7) through the first series of drivers (31), and the second ingot position control card (37) controls the speed of the second overfeeding assembly (8) through the second series of drivers (32);
the spindle is also provided with a sensing device (33) for detecting spindle current or the diameter of the outer yarn balloon, the sensing device (33) is electrically connected with the host control unit (29) through a communication module, and the diameter of the outer yarn balloon is controlled to be the energy-saving small balloon (36) through PID closed-loop regulation and is kept.
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| CN115369528B (en) * | 2022-10-21 | 2023-03-24 | 武汉纺织大学 | Integrated system for realizing balloon adjusting function of direct twisting machine based on image processing |
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| US6513314B2 (en) * | 2001-06-15 | 2003-02-04 | Acordis Industrial Fibers, Inc. | Apparatus and method of manufacturing multi-filament cords |
| US6775970B2 (en) * | 2002-04-26 | 2004-08-17 | Leobardo Paulino Fernandez | Apparatus and method for making a hybrid cord |
| CN103147186B (en) * | 2013-03-15 | 2016-12-28 | 浙江日发纺织机械股份有限公司 | Straight twister method for controlling yarn tension produced |
| CN103147177A (en) * | 2013-03-15 | 2013-06-12 | 浙江日发纺织机械股份有限公司 | Straight twisting machine |
| CN103809568A (en) * | 2014-02-25 | 2014-05-21 | 宜昌经纬纺机有限公司 | Electrical control system and synchronizing device for three-strand tire cord straight twisting machine |
| CN210596372U (en) * | 2019-08-13 | 2020-05-22 | 宜昌经纬纺机有限公司 | Three-strand direct twisting machine |
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