Patent Application
20190010632
The present invention relates to the field of textile machinery, in particular to a carpet twisting machine.
Spindles of the known BCF twisting machine adopt the spindle belt transmission mode, which means that a main motor in a machine head box drives a spindle transmission shaft, and the spindle transmission shaft drives spindles to rotate through a spindle belt. The spindle speed is changed through changing of belt pulleys. The spindle belt transmission mode is disadvantaged in complicated operation of change of the spindle speed, large workload, large difference in spindle speed between different spindles, and difficulties in cleaning of space below the spindles caused by occupation. For example, CN1473077A discloses a two-in-one spindle. For another example, CN102212903 A discloses a two-in-one spindle or a twisting spindle. For the spindle-belt transmission mode, the revolving speed of the spindle rod is usually 3,000-6,000 rpm, and the twisting efficiency is relatively low.
The known BCF twisting machine adopts an overfeeding mode that a yarn clamping disc pulls up twisted yarns and conveys the yarns to reeling rollers. A motor in a machine head box respectively drives an overfeeding shaft and a reeling shaft by changing the gear transmission ratio and adjusting the ratio of the revolving speed of the overfeeding shaft over the revolving speed of the reeling shaft. Another method for changing the overfeeding ratio is to change the wrap angle of the yarns on the yarn clamping disc. Changing the overfeeding ratio of the overfeeding structure through the yarn clamping disc must be carried in the halt mode, and the method of changing the gear transmission ratio and the method of changing the wrap angle of the yarns on the yarn clamping disc are both relatively complicated, massively labored and time-consuming.
The existing tension adjusters are usually complicated in structure. Common tension adjusters include hysteresis tensioner and electromagnetic tensioner. For example, Cao Xia stated that changing excitation could generate a relatively large effect on the torque in the Electromagnetic Yarn Tensioner Principle and Dynamic Property Testing and Analysis. However, affected by the number of the magnetic poles, the torque is fluctuating on the circumference. Such fluctuation has bigger effects when the revolving speed is lower.
The technical problem to be solved by the present invention is to provide a carpet yarn twisting machine, which can improve the twisting efficiency. In an optimized solution, the machine can apply to direct twisting/two-in-one twisting, ensure the reeling uniformity of the twisted yarns, control ballooning form to reduce energy consumption, and optimize the linearity of the tension control.
In order to solve the above technical problems, the present invention adopts the following technical solution: A carpet yarn twisting machine includes a machine frame, a creel unit, an electric spindle unit, an overfeeding unit and a reeling unit. In the electric spindle unit, a hollow spindle rod is fixedly connected with a motor; the motor drives the hollow spindle rod to rotate, and a twisting disc and a yarn storage disc are fixedly connected with the hollow spindle rod and rotate along with the hollow spindle rod.
The yarn storage disc is provided with yarn outlets which communicate with inner yarn channels of the hollow spindle rod.
Spindle tanks for accommodating inner yarn packages are connected with the hollow spindle rod through spindle rod bearings, and the spindle tanks are immobile.
In an optimized solution, the hollow spindle rod is provided with a step shaft at the top; at least two spindle rod bearings are sleeved on the step shaft; bearing base are respectively sleeved on respective spindle rod bearings; and lower spindle tanks of the spindle tanks are sleeved with the bearing bases;
wherein spindle tank inner rods, which are fixedly connected with the lower spindle tanks and are capable being replaced, are also provided;
wherein each one of the spindle tank inner rods includes a two-for-one twisting inner spindle rod for two-in-one twisting; the bottom of the two-for-one twisting inner spindle rod is sleeved with each corresponding one of the lower spindle tanks; the top of the two-for-one twisting inner spindle rod is provided with a two-for-one twisting spindle wing, the two-for-one twisting spindle wing is a suspending arm structure; the suspending arm is provided with a ceramic ring through which internal yarns pass at the free end; the two-for-one twisting inner spindle rod is formed with an axial through-hole in the middle; the through-hole communicates with the yarn channels with upward tails in a vertical direction in a yarn guide base component;
wherein a shaft is disposed in the center of the through-hole of the two-for-one twisting inner spindle rod; an upper steel lining and a lower steel lining are also disposed in the through-hole; the upper steel lining and the lower steel lining are penetrated on the shaft in the center of the through-hole;
or, a steel ball type two-in-one tensioner is disposed in the through-hole of the two-in-one twisting inner spindle rod, wherein the structure of the steel ball type two-in-one tensioner is that: the two-in-one twisting inner spindle rod is internally provided with a sliding inner spindle rod, the sliding inner spindle rod is sleeved with an inner spindle rod base in a sealing and sliding way, an inner spindle rod spring is disposed between the inner spindle rod base and the sliding inner spindle rod, the sliding inner spindle rod is provided with a spindle rod ceramic ring base at the top, the spindle rod ceramic ring base has a swelling cavity inside, a ceramic ring with a tapered upper opening is disposed at the bottom of the cavity, and the spindle rod ceramic ring base is internally provided with a steel ball.
In an optimized solution, a twisting package conveyor is disposed below the reeling unit; the twisting package conveyor is a belt conveyor which penetrates through the whole twisting station; the twisting package conveyor is provided with a twisting package unloading unit at the tail, and the twisting package unloading unit is provided with an inclined slideway at the top.
In an optimized solution, a liftable yarn guide unit is disposed at the top of each one of the spindle tanks; the yarn guide unit is internally provided with a suspending arm structure; the base of the suspending arm structure vertically slides along the machine frame; a ceramic ring through which yarns pass is disposed at the free end of the suspending arm structure; the axis of the ceramic ring is superimposed with the axis of the hollow spindle rod; and a mechanism for driving the yarn guide unit to move up and down includes a belt mechanism and a screw-and-nut mechanism or a pinion-and-rack mechanism.
In an optimized solution, in the overfeeding unit, driving overfeeding rollers and driven overfeeding rollers are arranged an interval;
the driven overfeeding rollers are inclined with respect to the axes of the driving overfeeding rollers;
the driving overfeeding rollers are connected with a driving unit through a transmission mechanism;
and the linear speed of the surfaces of the driving overfeeding rollers is higher than that of the surfaces of reeling rollers in the reeling unit.
In the optimized solution, in each one of the driving overfeeding rollers, a driving gear is in an engaged connection with a driven gear, while the driven gear is connected with a shaft through a bearing; the shaft is fixedly connected with a roller body; the shaft is connected with a bracket through the bearing; a clutch disc is installed on the shaft in an axial sliding way, the clutch disc is capable of driving the shaft to rotate; an end face of the clutch disc and an end face of the driven gear are in a separable transmission connection; the shaft is provided with a spring for compressing the clutch disc toward the driven gear and is also fixedly provided with an electromagnetic clutch; and the electromagnetic clutch is internally provided with a coil for absorbing the clutch disc, overcoming the spring force of the spring and separating the clutch from the driven gear.
In the optimized solution, in the reeling unit, a reeling bracket is a quadrilateral mechanism capable of swinging up and down; the reeling bracket is used for installing twisting packages; a reeling roller driven to rotate by a driven unit is disposed below each one of the twisting packages; the outer walls of the reeling rollers contact the outer walls of the twisting packages; and a transverse yarn guide is disposed in the yarn coming direction of the reeling rollers.
Each one of the reeling rollers is internally provided with a clutch device with a specific structure that: a reeling roller inner barrel is fixedly connected with a transmission shaft, a middle transmission member is supported on the reeling roller inner barrel through two transmission roller bearings, a reeling roller outer barrel is fixedly connected with the middle transmission member, a friction disc is disposed on one side of the middle transmission member, the friction disc and the reeling roller outer barrel are connected in a way of being capable of moving with respect each other along the axial direction and being incapable of rotating with respect to each other, the friction disc is made of ferromagnet, the middle transmission member is internally provided with a reeling roller electromagnetic coil, the reeling roller inner barrel is provided with a convex ring on the other side of the friction disc, the ring is provided with a friction sheet which is matched with the friction disc to from frictional transmission, and a spring is disposed between the middle transmission member and the friction disc.
In an optimized solution, a tension compensating rod is disposed between the overfeeding unit and the reeling unit; one end of the tension compensating rod is hinged with the machine frame while the other end is provided with a yarn wheel; twisted yarns going out of the overfeeding unit are reeled on the yarn wheel and then enter the reeling unit via the transverse yarn guide such that the tension compensating rod swings to be close to vertical and horizontal alternatively according to the tension.
In an optimized solution, a tension unit is also provided;
wherein the tension unit is disposed on the creel unit, the tension unit includes driven tension rollers and driving tension rollers of which the outer walls contact one another, the driven tension rollers are fixedly installed, the driving tension rollers are connected with tension air cylinders through fork-shaped tension brackets, the tension air cylinders communicate with air pipes, and each one of the air pipes is provided with an electromagnetic proportioning valve and an air pressure sensor;
or wherein the tension unit is disposed on the machine frame, a tension roller or a yarn guide wheel is fixedly connected with one end of a tension rod; the tension rod is supported on a fixed tension rod bearing; the other end of the tension rod extends into a sealed housing; the portion, in the sealed housing, of the tension rod is provided tension rod blades; the sealed housing is internally filled in with damping medium; the tension rod and the sealed housing are in a sliding connection; a tension motor and a nut sleeve are in a fixed connection; the nut and the sealed housing are in a threaded connection; by rotating the nut, the axial position of the sealed housing is capable of being adjusted, and the depth of the tension rod blades in the damping medium is capable of being adjusted.
The present invention provides a carpet yarn twisting machine. By adopting the solution that the motor directly drives the spindle to replace the solution of spindle belt transmission in the prior art, the spindle obtains a higher revolving speed that is increased from the existing 4,000-6,000 rpm to 7,000-10,000 rpm, improving the twisting efficiency of the carpet yarns. By adopting the driving overfeeding rollers with the electromagnetic clutches and cooperating with the tension compensating rod and the reeling unit, the overfeeding unit can ensure the reeling uniformity of the twisting packages, and can switch off the electromagnetic clutches according to the signals sent by a broken yarn detector to stop the equipment. The tension unit adopts the structure of pneumatic tension rollers and can conveniently realize automatic control over the tension. Or, the tension unit adopts a liquid damping tension adjusting structure and can realize linear adjustment on the tension changes without fluctuation during the tension adjusting process.
The present invention is further described in conjunction with attached drawings and embodiments.
In the figures: creel unit 1, tension unit 2, driven tension roller 201, driving tension roller 202, tension air cylinder 203, transmission 204, fork-shaped tension bracket 205, ceramic ring 206, air pipe 207, electromagnetic proportioning valve 208, air pressure sensor 209, yarn guide wheel 210, tension rod bearing 211, sealed housing 212, tension rod blade 213, damping medium 214, lock nut 215, nut sleeve 216, tension motor 217, tension rod 218, reeling unit 3, reeling bracket 301, reeling roller 302, transmission shaft 3021, transmission roller end cap 3022, transmission roller bearing 3023, middle transmission member 3024, reeling roller spring 3025, friction disc 3026, friction sheet 3027, reeling roller inner barrel 3028, reeling roller electromagnetic coil 3029, reeling roller outer barrel 3020, overfeeding unit 4, tension compensating rod 401, driving overfeeding roller 402, driving gear 4021, driven gear 4022, clutch disc 4023, electromagnetic clutch 4024, spring 4025, shaft 4026, roller body 4027, driven overfeeding roller 403, yarn guide wheel 404, electric spindle unit 5, motor 501, hollow spindle rod 502, yarn guide wheel component 503, yarn discharge hole 504, yarn storage disc 505, twisting disc 506, balance ring 507, magnet base 508, spindle rod bearing 509, bearing base 510, spindle tank inner rod 511, lower spindle tank 512, upper spindle tank 513, inner yarn tensioner 514, two-in-one inner spindle rod 515, upper steel lining 5151, lower steel lining 5152, spindle rod ceramic ring base 5154, sliding inner spindle rod 5155, inner spindle rod spring 5156, inner spindle rod base 5157, two-in-one spindle wing 516, spindle tank magnet 517, yarn guide unit 6, nozzle 7, twisting package conveyor 8, transverse yarn guide 9, twisting package unloading unit 10, twisting package 11, outer yarn pipe 12, external yarn 13, ballooning 14, inner yarn package 15, outer yarn package 16, twisted yarns 17.
As shown in
The yarn storage disc 505 is provided with yarn outlets 504 which communicate with inner yarn channels of the hollow spindle rod 502 such that the external yarns 13 go out.
Spindle tanks for accommodating inner yarn packages 15 are connected with the hollow spindle rod 502 through spindle rod bearings 509, and the spindle tanks are immobile. In the present invention, the motor directly drives the hollow spindle rod 502 to rotate. The external yarns enter the hollow spindle rod 502 via the external yarn pipe 12, and then are thrown out via the yarn outlets 504 to form ballooning, next merged and twisted with the internal yarns to form twisted yarns 17, and the twisted yarns pass through the overfeeding unit 4 and the reeling unit 3 to form the twisting packages 11.
The motor directly drives the spindle to revolve at a high speed, and the revolving speed of the spindle is higher than the tangential belt type or spindle belt type transmission, which is 2,000-4,000 rpm.
In an optimized solution, as shown in
The yarn guide base component 503 is a universal component for both direct twisting and two-in-one twisting. The yarn guide base component 503 is provided with two yarn channels, which do not communicate with each other and go from the vertical direction to the horizontal direction. The horizontal tails of the yarn channels are expanding structures, and of the vertical tails of the two yarn channels, one faces upward while the other one faces downward, as shown in
The yarn storage disc 505 is provided with two yarn outlets 504 corresponding to the two yarn channels.
The hollow spindle rod 502 is provided with a step shaft at the top; at least two spindle rod bearings 509 are sleeved on the step shaft; bearing base 510 are respectively sleeved on corresponding spindle rod bearings 509; and lower spindle tanks 512 among the spindle tanks are sleeved with the bearing bases 510.
Each one of the lower spindle tanks 512 is provided with a plurality of spindle tank magnets 517. A magnet base 508 is disposed at a position outside the lower spindle tanks 512 and corresponding to the spindle tank magnets 517. The magnet base 508 is fixedly installed on the machine flame. The magnet base 508 does not contact the lower spindle tanks 512. The magnet base 508 and the spindle tank magnets 517 generate a magnetic force to make the spindle tanks immobile.
In an optimized solution, as shown in
In optimized solution, as shown in
In an optimized solution, as shown in
As shown
A shaft is disposed in the center of the through-hole of the two-for-one twisting inner spindle rod 515; an upper steel lining 5151 and a lower steel lining 5152 are also disposed in the through-hole; the upper steel lining 5151 and the lower steel lining 5152 are penetrated on the shaft in the center of the through-hole. The tension of the internal yarns is adjusted using the friction force between the upper steel lining 5151 lower steel lining 5152 and the internal yarns.
Or, as shown in
By replacing different spindle tank inner rods 511, the direct twisting or the two-in-one twisting mode can be switched.
In an optimized solution, as shown in
A yarn guide unit 6 is internally provided with a suspending arm structure; the base of the suspending arm structure vertically slides along the machine frame; a ceramic ring through which yarns pass is disposed at the free end of the suspending arm structure; the axis of the ceramic ring is superimposed with the axis of the hollow spindle rod 502; and a mechanism for driving the yarn guide unit 6 to move up and down includes a belt mechanism and a screw-and-nut mechanism or a pinion-and-rack mechanism. The driving mechanism is not shown in the figure.
In an optimized solution, as shown in
The driven overfeeding rollers 403 are inclined relative to the axes of the driving overfeeding rollers 402, as shown in the
The driving overfeeding rollers 402 are connected with the driving unit through the transmission mechanism; the transmission mechanism is internally provided with an electromagnetic clutch 4024 for cutting off or passing power transmission of the driving overfeeding rollers 402; the electromagnetic clutch 4024 is controlled according to the tension of the twisted yarns 17 such that the power of the roller bodies 4027 is connected or cut off to compensate the overfeeding control error.
The linear speed of the surfaces of the driving overfeeding rollers 402 is higher than that of the surfaces of reeling rollers 302 in the reeling unit 3, and the ratio of the wo is called overfeeding ratio. The overfeeding ratio is mainly achieved through adjusting the revolving speed of the driving motor.
In the optimized solution, as shown in
In the present invention, the spindle is directly driven by the motor to rotate at a speed of 8,000-10,000 rpm. When the spindle of the twisting machine is rotating at a high speed, the twisted yarns generate very high twisting tension which is far greater than the twisting tension generated in the existing tangential belt driven or spindle belt driven spindle transmission mode. In the present invention, the reeling tension required for reeling the twisted yarns on the twisting packages 11 is smaller than the twisting tension, so the twisting machine in the present invention adopts the above overfeeding unit 4 with the above structure for the purpose of converting the twisting tension into the smaller required reeling tension through the overfeeding unit 4. For twisting machine in the tangential belt driven or spindle belt driven spindle mode, the spindle speed ratio is smaller than that of the twisting machine in the electric spindle mode of the present invention, and the corresponding twisting tension is also smaller, so a common yarn clamping disc type overfeeding unit can be used to reduce the yarn twisting tension to the tension required for reeling. For the winch type overfeeding unit of the present invention, the generated friction force varies with the circles of the yarns reeled on the driving overfeeding rollers 402 and the driven overfeeding rollers 403, so different reeling tensions for twisting different types of yarns can be obtained. The clamping friction force generated by the yarn clamping disc type overfeeding unit on yarns is achieved through the wrap angle and varies in a small scope, therefore the yarn clamping disc type overfeeding unit cannot be adapted to the twisting of various twisting yarns and cannot convert the very high twisting tension generated during the high-speed rotation of the electric spindle into smaller tension for reeling.
In the optimized solution, as shown in
A further optimized solution can be seen in
In an optimized solution, as shown in
In an optimized solution, as shown in
In an optional solution, as shown in
Or, in another optional solution, as shown in
Direct Twisting Mode:
During direct twisting, the external yarns 13 are imported from the outer yarn packages 16 of the creel unit 1. The pulling force comes from the driving overfeeding rollers 402 of the overfeeding unit 4. The external yarns 13 pass through the tension unit 2 while receiving a certain resistance. In this embodiment, the tension unit 2 includes a pneumatic tensioner, an electromagnetic tensioner and a liquid medium type tensioner. By the effect of a nozzle 7, the external yarns 13 pass through the outer yarn pipes 12 in turn in virtue of a negative pressure, enter the hollow spindle rod 502, pass through a direct twisting yarn channel 5031, and are thrown out via the yarn outlets 504 of the yarn storage disc 505. Due to the rotation of the yarn storage disc 505 and the twisting disc 506, the external yarns 13 form a certain wrap angle on the outer circle face of the yarn storage disc 505, and then form a ballooning 14 close to the outer circular arc face of the bottom of the twisting disc 506. The yarn guide unit 6 is positioned above the ballooning 13. The external yarns 13 pass through the ceramic hole of the yarn guide unit 6 on the extension line of the axis of the hollow spindle rod 502. The yarn guide unit 6 adjusts the height position according to the ballooning form. The internal yarns of the inner yarn packages are exported from the inner yarn packages 15 of the spindle tanks, pass through the inner yarn tension 514, and then are merged with the external yarns 13 at the ceramic hole of the yarn guide unit 6 to form the twisted yarns 17. The twisted yarns 17 are coiled on the surfaces of the driving over feeding rollers 402 and the driven overfeeding rollers 403 of the overfeeding unit 4 by several cycles, and driving motors in the driving overfeeding rollers 402 rotate to generate a pulling force to pull the twisted yarns 17. In the overfeeding unit 4, the shafts of the driving gears 4021 are connected with the driving motors, and the driving gears 4021 are in an engaged connection with the driven gears 4022, so a lateral end face of each one of the driven gears 4022 contacts with a corresponding one of the clutch discs 4023 in a clutching way. When the driven gears 4022 contact the clutch discs 4023, the power can be transmitted to the shafts 4026, and when the contact is cut off, the power cannot be transmitted to the shafts 4026. A spring 4025 is disposed on one side of each one of the clutches 4024. By default, the spring 4025 compress the clutch 4023 onto one lateral end face of each corresponding one of the driven gear 4022 to keep transmission. On the same side of the spring 4025, an electromagnetic clutch 4024 is also provided, and the magnetic force generated by the electromagnetic clutch 4024 is big enough such that the clutch 4023 overcomes the spring force of the spring 4025 to separate from the lateral end face of the driven gear 4022, thus cutting off the power transmission. When the tension of the twisted yarns 17 is too high or a fault occurs, the electromagnetic clutch 4024 actuates once, for example releasing the excessive tension in a semi-clutching mode, to avoid the accident of yarn breaking. Preferably, a broken yarn detection unit is also provided. The broken yarn detection unit is an electrical control broken yarn detection unit, including a photoelectric sensor. When the photoelectric sensor detects yarn breaking faults, the control unit controls the electromagnetic clutch 4024 to be electrified, thus cutting off the transmission line between driven gear 4022 and the clutch 4024.
The twisted yarns 17 are continuously reeled on the reel at the free end of the tension compensating rod 401. The twisted yarns 17 pass through the ceramic hole of the transverse yarn guide 9 and then are reeled on the surface of the twisting package 1. After the twisting is completed, the finished twisting package 11 falls onto the twisting package conveyor 8. The twisting packages are conveyed by the twisting package conveyor 8 and collected at the twisting package unloading unit 10. Thus, the direct twisting operation flow is completed.
Two-in-One Twisting Mode:
During two-in-one twisting, the inner yarn packages 15 are exported from the lower spindle tanks 512. At this time, the upper spindle tanks 513 are taken down. The lower spindle tanks 512 are internally inserted with two-in-one inner spindle rods 515. The inner yarn packages pass through the ceramic hole on two-in-one spindle wing 516, insert into the top holes of the two-in-one inner spindle rods 515, and pass through the upper steel linings 5151 and lower steel linings 5152 in turn. The upper steel linings 5151 and lower steel linings 5152 are bullet shaped, generating a braking force on the internal yarns. The internal yarns possess a certain tension after passing through the upper steel linings 5151 and lower steel linings 5152. The internal yarns go out via two-in-one twisting yarn channels 5032 of the yarn guide base components 503, and are thrown out via the yarn outlets 504. Due to the rotation of yarn storage disc 505 and twisting disc 506, the external yarns 13 form a certain wrap angle on the outer circle face of the yarn storage disc 505, and then form a ballooning 14 close to the outer circular arc face of the bottom of the twisting disc 506. The yarn guide unit 6 is positioned above the ballooning 13. The external yarns 13 pass through the ceramic hole of the yarn guide unit 6 on the extension line of the axis of the hollow spindle rod 502. The yarn guide unit 6 adjusts the height position according to the ballooning form. After passing through the yarn guide unit 6, the yarns are changed into two-in-one twisted yarns. The twisted yarns pass through the overfeeding unit 4, enter the transverse yarn guide 9 and the reeling unit 3, and then are reeled on the surface of the twisting package 11. After the twisting is completed, the finished twisting package 11 falls onto the twisting package conveyor 8. Thus, the two-in-one twisting operation flow is completed. In the two-in-one twisting mode, accessories such as the outer yarn pipes 12, the nozzle 7, the upper spindle tanks 513 and the inner yarn tensioners 514 are not needed. By taking down the upper spindle tanks 513 and inserting the two-in-one inner spindle rods 515, the present invention can be switched to the two-in-one twisting mode.
The above embodiments are merely some preferred technical solutions of the present invention, and cannot be regarded as limits to the present invention. The embodiments and the technical features of the embodiments in the present invention can be randomly combined if there is no conflict. The protective scope of the present invention should be subject to the technical solution of the Claims, including the equivalent replacement solutions of the technical features in the technical solution of the Claims. The equivalent replacements and modifications on this basis should also fall within the protective scope of the present invention.
| Number | Date | Country | Kind |
|---|---|---|---|
| 201710548484.7 | Jul 2017 | CN | national |
