JP2947368B2 - Sliver switching method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for switching slivers when a sliver in a can is consumed and a next sliver is drawn out from a stand-by can in a binding spinning machine for spinning yarn directly from the sliver. About.

[0002]

2. Description of the Related Art A conventional sliver switching method is such that after a sliver contained in a can is completely consumed, a new sliver terminal and a next sliver tip are joined together,
It was usual to be continuous by so-called firs.

After the sliver is completely consumed,
When the new sliver is supplied to the machine base, fine yarn is generated in the spun and wound yarn on the package side, it takes extra time to remove it, and the leading sliver disappears and the next sliver is removed. Efficiency is reduced because spinning is stopped until feeding is started.

Further, in the case of the spliced portion, the spliced portion causes the nozzle clogging of the air spinning nozzle, and even if the nozzle clogging does not occur, it causes the generation of thick yarn and thin yarn.

[0005]

SUMMARY OF THE INVENTION According to the present invention, when a sliver in a can is consumed and a next sliver is drawn out from a can in a standby state and supplied, a thick yarn or a thin yarn is generated or an air spinning nozzle is not used. An object of the present invention is to provide a sliver switching method that does not cause nozzle clogging.

[0006]

A draft part, a pneumatic spinning nozzle provided so that a suction port faces a nip point formed by a front roller pair of the draft part, a nip point of the front roller, and a pneumatic spinning nozzle opposed thereto A dust collector that sucks the vicinity of the suction port, a standby sliver extraction member that grips the sliver in standby and overlaps the sliver in standby with the sliver being spun, and a sliver splicer that presses and overlaps the overlapped new and old slivers. In the sliver switching device having the above, when the remaining amount of the sliver during spinning becomes small, the standby sliver extraction member pulls out the standby sliver tip from the standby sliver and overlaps with the sliver during spinning. The yarn is sent to the driver and the spinning of the yarn by the air spinning nozzle is interrupted. The spliced sliver is sucked into the dust collector, the sliver being spun is cut at the upstream of the draft section, passed through the drab section only as a standby sliver, and the spinning of the yarn by the air spinning nozzle is resumed, and the sliver is sent out from the front roller. The standby sliver is sucked into the air spinning nozzle and the spinning of spun yarn is resumed.

[0007]

The standby sliver is spliced on the preceding sliver so that troubles such as generation of thick yarn and fine yarn and clogging of the air spinning nozzle do not occur.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

A sliver S drawn from a can (not shown) and fed through a trumpet guide 1, a back roller 2 composed of a back top roller 2a and a back bottom roller 2b is a middle top roller on which an apron band 3a is mounted. 4a and a middle bottom roller 4b on which an apron band 3b is mounted.
Through the front top roller 5a of the front roller 5.
The sliver S is turned into a fiber bundle 6 by being nipped and pulled out between the air spinning nozzle 7 and the front bottom roller 5b. After passing through the first nozzle 9 for suction and the second nozzle 10 for twisting, the spun yarn 11 is sent to the next process such as a winder.

[0010] Between the first nozzle 9 and the second nozzle 10, there is a first nozzle.
An exhaust port 12 for discharging the compressed air supplied to the nozzle 9 to the outside of the air spinning nozzle 7 is provided. Also, the middle rollers 4,
A dust collector 14 is provided in a lower portion from the lower portion of the front roller 5 to the exhaust port 12 of the air spinning nozzle 7 and has a through hole 13 which covers the periphery thereof and communicates with a suction duct (not shown).

A support rod 1 is provided at the bottom of the air spinning nozzle 7.
The arm 16 rotatably supported by the extension 5 extends,
15 swings the air spinning nozzle 7 around the center, the end 17 of the dust collector 14 on the side of the air spinning nozzle 7 forms a stopper for the arm 16, and as shown in FIG. Suction port 8 at the tip of air spinning nozzle 7 when shaken
Is regulated so as to accurately face the nip point of the fiber bundle 6 formed by the front top roller 5a and the front bottom roller 5b.

Therefore, as shown in FIG. 2, when the sliver S1 being spun is consumed and the remaining amount in the can (not shown) becomes small, the sliver S1 is shifted from the can (not shown) in the standby state. The S2 end is guided to the entrance of the trumpet guide 1 and overlaps with the sliver S1 being spun.
Swings the air spinning nozzle 7 around the
The slivers S1 and S2 discharged from the front roller 5 are sucked by the dust collector 14 and the yarn is spun out by the air spinning nozzle 7 by removing the opposition between the suction port 8 at the tip and the nip point of the fiber bundle 6 in the front roller 5. Interrupt.

When both spliced slivers S1 and S2 pass through the draft section and are sucked into the dust collector 14, the sliver S1 being spun is cut upstream of the draft section,
Only the standby sliver S2 passes through the draft, and the suction port 8
The sliver S2 sent out from the front roller 5 is sucked into the suction port 8 of the pneumatic spinning nozzle 7 which has returned to the old position facing the nip point of the front roller 5, and the yarn 11
Resume spinning. The spun yarn 11 is spliced with a package-side yarn end by a knotter (not shown) and wound up.

Then, the back roller 2, the middle roller 4,
Spliced sliver S passing through front roller 5
The 1 and S2 portions are introduced into the dust collector 14 and removed by suction.

The splicing of the slivers S1 and S2 and the swinging of the air spinning nozzle 7 can be automatically performed by taking the following means.

That is, the production amount of spun yarn, that is, the consumption amount of the sliver, is measured in advance by the constant length device and stored in the control device, and when it is detected that the sliver being spun is consumed by a certain amount, or And a trumpet guide, a sensor is placed in a supply creel portion, and when the amount of sliver that has passed through the creel portion is detected, a sliver exchanging signal is issued from the control device to remove the sliver end from the cans in standby. Guide to the entrance of the trumpet guide,
The splicing is performed with the sliver during spinning, and at the same time, the air spinning nozzle is swung.

An apparatus as shown in FIG. 3 can be used as an apparatus for performing the splicing.

That is, in the figure, the sliver S 1 being spun is fed out from the can 20 to the trumpet guide 1 via the creel portion 21. Kens 22 waiting
The tip of the sliver S2 housed on the hook 22 is supported on the hook 22. Then, when a sliver exchange signal is issued from the control device, the arm 23 is rotated, and the sliver gripper 24 at the tip of the arm 23 is sliver S2 supported on the hook 22.
Close the tip and grasp the tip, then arm
By returning the sliver S2 to the old position, the sliver S2 is pulled out to the entrance of the trumpet guide 1, and the sliver S2 is pressed and overlapped on the sliver S1 by rotating the sliver presser 25, whereby the sliver S1 and the sliver S2 are combined. The splicing is performed at the entrance of the trumpet guide 1.

Further, after splicing the slivers S1 and S2, the sliver S1 is cut, and the cut end passes through the back roller 2, the middle roller 4, and the front roller 5, and
The time required until only the sliver S2 passes between the rollers is measured in advance and stored in the control device,
After the splicing, when the predetermined time has elapsed, a signal is issued to oscillate the air spinning nozzle 7 to return it to the old position.
The drawn sliver fiber that has been sucked is sucked into the suction port 8 of the air spinning nozzle 7. At this time, the suction force of the suction port 8 is far superior to the suction force of the dust collector 14, so that the drafted sliver fiber is easily separated from the sliver fiber guided to the dust collector 14, and the air spinning is performed. It is sucked by the suction port 8 of the nozzle 7. The sliver fiber that has entered the air spinning nozzle 7 is twisted, and the spun spun yarn 11 is spliced with the yarn end on the package side and wound around the package to complete the sliver switching.

[0020]

As described in detail above, according to the sliver switching method of the present invention, when the remaining amount of the sliver during spinning becomes small, the sliver tip is pulled out from the stand-by can and guided to the trumpet guide entrance. While performing splicing, the air spinning nozzle is swung to disengage the suction port at the tip of the air spinning nozzle from the nip point of the fiber bundle of the front roller, and the spinning of the yarn by the air spinning nozzle is interrupted. Waiting for both spliced slivers to pass through the draft section, cuts the sliver being spun, and then waiting for the cut end to pass through the draft section, piecing with a knotter and the oldest of the air spinning nozzle. The swing back to the position is performed, and the spinning of the spun yarn is restarted. The splicing of the sliver and the swinging of the air spinning nozzle are performed by measuring the consumption of the sliver in advance by a fixed length device and storing this in the control device, and when the actual consumption of the sliver matches the storage. Since the control is performed by a signal output from the control device, the spliced sliver portion is sucked and removed into a dust collector in a state of a fiber bundle, and the spliced portion is not spun as a spun yarn, and therefore, a thick yarn or a thin yarn. Without the formation of yarn, the production of poor quality spun yarn is prevented, and the occurrence of nozzle clogging in the air spinning nozzle can be completely prevented, greatly improving productivity and spun yarn quality. Could contribute.

[Brief description of the drawings]

FIG. 1 is a side view of a binding spinning apparatus for carrying out the method of the present invention.

FIG. 2 is a side view of the binding spinning device at the time of sliver switching.

FIG. 3 is a perspective view of a sliver splicing device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Trumpet guide 2 Back roller 4 Middle roller 5 Front roller 7 Pneumatic spinning nozzle 12 Exhaust port 14 Dust collector 15 Support rod 16, 23 Arm 22 Hook 25 Sliver presser

Claims (2)

(57) [Claims] 1. A draft part, an air spinning nozzle provided so that a suction port faces a nip point formed by a front roller pair of the draft part, and a nip point of the front roller and an air spinning nozzle suction port opposed thereto. A dust collector that sucks the vicinity, a standby sliver extraction member that grips the sliver in standby and overlaps the sliver in standby on the sliver being spun, and a sliver splicing device that presses and overlaps the overlapped new and old slivers. In the sliver switching device having, when the remaining amount of the sliver during spinning becomes small, the tip of the standby sliver is pulled out from the standby sliver by the standby sliver take-out member, and the sliver being spun is overlapped with the sliver during the spinning and the draft section is formed. And the spinning of the yarn by the air spinning nozzle is interrupted, and the spliced The sliver is sucked into the dust collector, the sliver being spun is cut at the upstream of the draft section, and the sliver passes through the draft section only as the standby sliver, and the spinning of the yarn by the air spinning nozzle is resumed, and the standby is sent from the front roller. A sliver switching method for sucking a sliver into a pneumatic spinning nozzle and restarting spinning of spun yarn. 2. The splicing of the sliver and the swinging of the air spinning nozzle are performed by measuring the consumption of the sliver in advance by a constant-length device and storing it in a control device. 2. The sliver switching method according to claim 1, wherein the sliver switching is performed by a signal issued from the control device when they match.