JPH03823A - Spinning frame for making short fiber thread - Google Patents

Abstract

PURPOSE: To accurately cooperate all constituent elements and perform the fine spinning of staple fiber in high yarn quality by using respectively specific drawing frame, centrifugal spindle and winder, twisting each yarn in two stages and winding the twisted yarn. CONSTITUTION: The yarn path between a centrifugal spindle 10 and the outlet of a drawing frame 4 provided with a fiber material stopping apparatus 6 and a suction apparatus 5 is directed slantly downward to form an acute angle relative to the vertical line of the machine. A yarn-ending injector 7, a yarn inspection device 8 and a yarn-guide tube 9 for the centrifugal spindle are collectively placed in the yarn path. A winder with a bobbin is placed above the drawing frame in a state to draw the yarn upward from the centrifugal spindle 10 with a take-up apparatus forming an angle relative to the axis of the centrifugal spindle. An injector, a yarn storage device, a yarn transferring device, a yarn sucking device, a yarn brake, etc., are placed between the take-up apparatus and the winder holding a bobbin. Fine spinning operation can be carried out by the use of the frame to obtain a yarn having high quality.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a method in which six yarns are twisted in two stages by a filament device, a centrifugal spindle, and a winding device, and then wound onto a twisted bobbin. A spinning machine for producing short fiber yarn (as defined in the generic part of claim 1), in which the yarn is composed of several fillings of centrifugal spindles, the ends of the yarn being connected to each other .

[Conventional technology]

A method is already known in which a part of the twist is added to the yarn during spinning, and the remaining twist is added when the yarn is wound, so that the yarn is continuously spun, kneaded (heated), and wound. This is achieved by the continuous rotation of the spinning pot during uninterrupted supply of untwisted yarn from the filament device, followed by winding of the yarn from the filled spinning pot onto the cross bobbin. After filling the spinning pot, the yarn is passed to a winding mechanism, the process being carried out alternately with two or more feeding devices, winding mechanisms and spinning pots (WP Patent No. 22,772). reference).

Furthermore, methods and devices are known for simultaneously winding and adding yarn in a continuous spinning process, in which the yarn is guided by an automatic feeding device to a centrifugal spindle and then from the centrifugal spindle to a bobbin. The continuous spinning process is achieved in that one centrifugal spindle receives yarn from a feeding device, while the yarn from the other centrifugal spindle, which has already been filled, is sent to a winding device. This process is performed alternately. In that case, the thread wound on the bobbin consists of one or more centrifugal spindle fillings (German Patent Application No. 22
(See Publication No. 29263). A disadvantage of this known method, apart from some principle drawbacks, is that it cannot be implemented in practice due to the lack of sufficient disclosure here.

[Problem to be solved by the invention]

The object of the invention is to provide a spinning machine for the production of short fiber yarn in two stages, in which all the components cooperate precisely, with good equipment and access, and with which a high yarn quality is obtained. There is a particular thing.

[Means to solve the problem]

According to the invention, this object is achieved by providing that the yarn path between the outlet of the filament device with the fiber material stopping device and the suction device and the centrifugal spindle is oriented obliquely downward at an acute angle to the machine normal. , a yarn splicing injector in the yarn path;
A yarn monitor and a yarn guide tube for the centrifugal spindle are grouped together, and a winding device with a bobbin is installed above the filament device, so that the yarn being pulled out from the centrifugal spindle by the pulling device is aligned with the axis of the centrifugal spindle. An injector, a yarn storage device with a yarn monitor, a yarn conveyor, and a yarn suction device are arranged such that the winding device is directed upwardly at an angle, and between the drawing device and the winding device with a bobbin, an injector, a yarn storage device with a yarn monitor, a yarn conveyor, and a yarn suction device are arranged. This is achieved by the arrangement of a thread cleaner, a thread brake, a thread cleaner with a cutting device and a thread monitor, a splicer or knotter and a thread finder.

The thread guide tube and the centrifugal spindle are relatively movable,
The yarn guide tube is arranged to perform a basic stroke movement and the centrifugal spindle to perform a full stroke movement, the centrifugal spindle being returned to or close to its starting position during the winding operation. A purification device is attached to each centrifugal spindle, and the centrifugal spindle is provided so that it can be pulled out to a purification position. The spinning machine is built on one side,
A sliver can is arranged behind it for storing the fiber strips. When a spinning machine stores spare yarn, either spare bobbins are provided on both sides above the filament device, or on one side a spare bobbin is provided above or below the filament device.

〔Example〕

The present invention will be described in detail below with reference to embodiments shown in the drawings.

Sliver can 1 (see Figure 1) or spare bobbin 2
(See Figure 2) The short fiber material 3 comes from the filament g
! 4 and then striated according to the desired thread density. Before the first-stage stiffening process is started, the filamented short fiber material 3 is guided to the suction device 5 or its supply is interrupted by a fiber material stop device 6 . In order to realize the first warming stage, a splicing injector 7, a yarn monitor 8, a yarn guide tube 9 and a centrifugal spindle 10 are utilized in succession to the yarn path. To start the first tensioning phase, compressed air is supplied to or shut off from the openable and closable splicing injector 7, which is designed as a pivoting injector.

The short fiber material 3 coming from the filament device 4 to the suction device 5 or freed from the fiber material stopping device 6 is received in the splicing injector 7, is spliced, and is passed through the yarn guide tube 9.
The thread 11 is pushed through the thread guide tube 9 into the centrifugal spindle 10 and comes into contact with its inner wall.
The partially curled yarn 11 is wound into a coil. In that case, the yarn is twisted between the centrifugal spindle 10 and the outlet of the filament device 4 in a ratio between the rotational speed of the centrifugal spindle 10 and the feed rate. The irregularity inside the centrifugal spindle 10 sucks the formed thread 11 through the thread guide tube 9 and thereby assists the action of the splicing injector 7. After the yarn 11 has come into contact with the inner wall of the centrifugal spindle 10, the supply of compressed air in the splicing injector is interrupted and this injector 7 is opened, so that the yarn joining and tightening at the outlet of the filament device 4 are no longer possible. It progresses freely to the point and the expected thread breakage is reduced.

The occurrence of yarn breakage is detected by the yarn monitor 8 and, for a predetermined period of time, the supply of the short fiber material 3 is interrupted by the fiber material stop device 6 or the short fiber material 3 is directed to the suction device 5. In order to carry out the second winding stage and to wind up the yarn 22, a withdrawal device 12, an injector 13, a yarn injector 13, a yarn Yarn storage 14 with monitoring device, yarn conveyor 15, yarn suction device 16, yarn brake 1
7. A thread cleaner 18 equipped with a cutting device and a thread monitor, a splicer or knotter 19, a thread finder 20 and a bobbin 2
A winding device with 1 is arranged. At the end of the first tensioning phase, when the yarn mass in the centrifugal spindle 10 reaches a predetermined value, the withdrawal device 12, which was previously open for free passage of the yarn, is closed and rotated, thereby The thread 11 is discharged from the centrifugal spindle 10.

The twisting of the yarn applied by the centrifugal spindle 10 now causes the tightening of the drawing device 12 to reach only the gap, so that the yarn 1
1 separates at the exit of the filament device 4.

The free thread end is grabbed by the injector 13,
A thread suction device 16 is led through the thread store 14 . In that case, the conveying speed given by the drawing device 12 is
The twist that is still missing in the drawing device 12 is large enough to be added in a ratio between the rotational speed of the centrifugal spindle 10 and the conveying speed of the drawing device 12. The filamented short fiber material 3 still present in the filament device 4 is sucked out by the suction device 5 and further supply is interrupted by the fiber material stop device 6 . Before the end of the first winding stage, the thread 22 already present on the bobbin 21 of the winding device is
From the yarn finder 20 it is pushed to the splicer or knotter 19. In terms of time, this is the first time in actual driving.
The degree of tension of the yarn 11 in the tensioning stage is greater than that in the second tensioning stage, and therefore the time required for the second tensioning stage, including the winding process, is shorter than for the first tensioning stage. This is possible as long as it is possible. The yarn 22 coming from the withdrawal device 12 is therefore grasped by the yarn conveyor 15 between this yarn suction device 16 and the outlet of the yarn storage device 14 immediately after it has been located in the yarn suction device 16 and is likewise transferred to the splicing device. or proceed to the tying device 19. Immediately before the thread 22 is grabbed by the conveyor 15, the thread 2
After the yarn 22 is stored in the yarn storage 14 and both yarn ends are connected in the splicer or knotter 19, winding of the yarn 22 that has been twisted is started. The winding speed is initially determined to be greater than the transport speed of the drawing device 12, so that the thread store 14 is emptied and the winding speed is then reduced to the degree normally required for winding. .

When the thread 22 breaks or is separated by cutting from the thread cleaner 18, the thread piece coming from the withdrawal device 12 likewise reaches the thread suction device 16. The thread 22 present on the bobbin 21 is grabbed by the thread finder 20 and advanced to the splicer or knotter 19, and the thread storage, thread conveyor, splicer or knotter, and winding device are as described above. It functions repeatedly in a predetermined time order. The yarn monitor 8 and the yarn monitor connected to the yarn storage device 14 and the yarn cleaner 18 are as follows:
It is used to monitor the yarn 11.22 and initiate certain functions in the event of a fault in the yarn path.

The thread brake 17 adjusts the tension of the thread 22 to be wound,
At the same time, it may also be used to unravel thread loops created by the reservoir.

From FIGS. 1 and 2, it can be seen that in the first winding stage it is driven from top to bottom, and in the second winding stage and for winding the thread 22 it is driven from bottom to top; In this case, the partially joined yarn 11 is transferred from the first joining stage to the second joining stage.
It can be seen that when changing the operating cycle to the addition stage, the thread guide tube 9 is present.

FIG. 3 shows the centrifugal spindle 10 in different states. To begin the first tensioning phase, the centrifugal spindle 10 is in position. The formation of the thread coil on the centrifugal spindle 10 takes place in such a way that a constant basic stroke is carried out by the thread guide tube 9. The basic stroke is successively shifted until a predetermined total stroke is achieved. This displacement is effected by moving the centrifugal spindle 10 to position B. , during the second warming stage and the winding process,
The centrifugal spindle 10 is returned to or close to its starting position IA on the basis of a preselectable course of movement.

Since at the end of the winding process there may also be yarn material or other volumes present in the centrifugal spindle 10 due to yarn breakage, the centrifugal spindle 10 can be moved very quickly to position C for cleaning after the end of each winding process. guided by. When this position C is reached, the centrifugal spindle 10 is purified pneumatically or mechanically by means of a purifying device 23. After the end of this purifying action, the centrifugal spindle 10 returns to the starting position ii! Placed on A as quickly as possible.

FIG. 3 is a schematic side view of the spinning machine with a spinning frame; FIG. 3 is a schematic side view showing various positions of the centrifugal spindle;

2... Spare bobbin, 4... Firing device, 5... Suction device, 6... Fiber material stopping device, 7... Yarn splicing injector, 8... Yarn monitor, 9... ...Thread guide tube, 10
...Centrifugal spindle, 12...Drawer device, 13.
... Injector, 14... Yarn storage device, 15... Conveyor, 16... Yarn suction device, 17... Yarn brake, 18
...Thread cleaner, 19...Thread splicer or knotter, 2
0...Thread finder, 21...Bobbin, 23...Purifier.

Claims (1)

[Claims] 1. Each yarn is twisted in two stages by a filament device, a centrifugal spindle and a winding device, and the yarn wound on the twisted bobbin is twisted by a plurality of fillings of the centrifugal spindle. In spinning machines for the production of short fiber yarns, the exit and centrifugation of the filament device (4) with a fiber material stopping device (6) and a suction device (5) are constructed and the ends of the yarns are connected to each other. The yarn path between the spindle (10) forms an acute angle (α) with respect to the machine normal and faces obliquely downward, and a yarn splicing injector (7) and a yarn monitoring device (8) are installed in the yarn path.
and a thread guide tube (9) for the centrifugal spindle (10), and a bobbin (
The winding device with 21) is arranged in such a way that the drawing of the thread from the centrifugal spindle (10) by the drawing device (12) takes place upwardly at an angle to the axis of the centrifugal spindle (10). and said drawer device (12)
and the winding device with bobbin (21), an injector (13), a yarn storage device (14) with a yarn monitor, a yarn conveyor (15), a yarn suction device (16), a yarn brake ( 17)
, a thread cleaner (18) with a cutting device and a thread monitor, a splicer or knotter (19), and a thread finder (20)
A spinning machine for producing short fiber yarn, characterized in that: 2. The thread guide tube (9) and the centrifugal spindle (10) are arranged to be movable relative to each other, such that the thread guide tube (9) performs a basic stroke movement and the centrifugal spindle (10) performs a full stroke movement. 2. The spinning machine according to claim 1, wherein the centrifugal spindle (10) is returned to or near its starting position (A) during the winding operation. 3. A purification device (23) is attached to each centrifugal spindle (10), and the centrifugal spindle (10) is in the purification position (C
3. The spinning machine according to claim 1 or 2, wherein the spinning machine is provided so as to be able to be pulled out up to ). 4. Spinning machine according to claim 1, characterized in that the spinning machine is built on one side, behind which a sliver can (1) for storing the fiber strip is arranged. 5. When the spinning machine stores spare yarn, either a spare bobbin (2) is provided on both sides above the filament device (4), or a spare bobbin (2) is provided above or below the filament device (4) on one side. 4. The spinning machine according to claim 1, further comprising a spare bobbin (2) located at the center of the spinning frame.