DE2637540A1 - VACUUM DEVICE FOR LAYING UP THE THREAD OF THREAD - Google Patents

Description

DR.-ING. G. RIEBLING

My sign

S 428-31 / 1YlB

Please repeat in the answer

l_ J

Your reference Your message from 899 Lindau (Bodensee)

Rennerle 10 P.O. Box 3160

August 18, 1976 ^Subject: Applicant; Officine Savio SpA, Via Udine, 3317ο Pordenone / Italy

Vacuum device for layering the yarn thread

The present invention relates to a vacuum device for stacking the yarn thread, in particular a rotatable vacuum drum for reversing the on the Layers of yarn stored in the drum, i.e. the shifting of the lower layers of yarn upwards and vice versa.

Negative pressure drums are known consisting of a hollow, perforated drum, with negative pressure inside the same made luirdj the use of such drums in different processing phases of natural and synthetic fibers

709810/0789 " ² " _{h kk t}

Telephone Telegraph: Office hours: Bank accounts: Postal check account:

Lindau (08382) 6917 05 4374 by appointment Bayer. Vereinsbank Lindau (B) No. 120 85 78 Munich 295 25-809

Bavarian Mortgage and Exchange Bank Lindau (B) No. 278920

is known. Layers of yarn are formed on a rotating drum, which act as bearings between a yarn storage point and serve as a processing station.

In this case, the yarn thread is wound on one side of the rotating vacuum drum and from the
removed from the other side, the circumference of the yarn layers being constantly monitored in order, if necessary, to be able to act in a suitable manner on the yarn supply point, the processing station or on the drum itself.

The yarn thread coming from the supply point comes in
Laying layers on the said drum, with various disadvantages being noted when the yarn thread is withdrawn.

These disadvantages occur above all with thin, less resistant yarns, since in all known working methods the lower thread layer is started to be drawn off, since it was formed first. The disadvantage
consists in the fact that the yarn thread withdrawn from the bottom layer becomes entangled due to the reversal of the layers and forms knots or flakes, which in the following phases of processing lead to the thread breaking
being able to lead.

709810/0789 ³ "

Another disadvantage, also during the phase of the Withdrawal of the thread consists in the formation of thread splits, which can also lead to the thread breaking in the following processing phases.

Another disadvantage due to the reversal of the layers Thread withdrawal is the formation of crimps in the thread, which like the already mentioned entanglements or splits of the thread to tear it in the subsequent ones Processing operations.

These disadvantages are of the known devices, especially with thin, less resistant yarn threads, not completely eliminated, not even by the known, tubular devices in which the yarn thread is on stacked on one sgite and peeled off on the other side. Since the thread in this device on Pipe comes to lie on top of each other, but not held on more than one loop of thread can be pulled off on one, especially with thin, less resistant thread threads causing the known disadvantages of crimps, splits or tangles of the thread.

The device according to the invention sees a pair of hollow, perforated drums, inside which negative pressure is created will. The pair of drums made in this way makes it possible

709810/0789 - ₄ -

"*" 263754Q

the withdrawal of the thread without the formation of tangles, Cleavages or ripples and serves at the same time for Spreicherung of the thread thread, and not only those mentioned Disadvantages avoided, but new advantages can be achieved.

One advantage is that by reading the circumference the layers of yarn on the take-off drum generate signals can be, by means of which a control of the feed and withdrawal speed and the rotational speed of the Drum itself is possible.

Another advantage is that the relative speed the drums influenced in a suitable manner can be used to facilitate the removal of the thread and the formation of tangles, cleavages, crimps or avoid dropping more than one loop at a time.

These advantages as well as other, new uses and advantages, which emerge from the following description, are achieved by the subject matter of the present invention, and that the object is achieved by a vacuum device for layering the yarn thread, the device being connected to devices for feeding and withdrawing the thread, marked

709810/0789

characterized by a first, rotatable, under negative pressure standing drum, which carries the thread from said facilities for. takes up the feed of the fadere, and a second, parallel to the first, stored under negative pressure standing drum, ujelchs in the opposite direction to the first The drum rotates and takes up the thread from this and υοη which it can then be removed with the above-mentioned device for triggering, with one on the second drum Reading device for the circumference of the yarn layer is located, which with the devices for the supply and for the Withdrawal of the thread, as well as connected to the drums themselves.

The following is a description of a preferred embodiment of the invention, which is by way of example and not limitation with reference to the accompanying drawings.

It shows:

1 shows a device according to the invention j

Fig. 2 is a section along line A-A of Fig. 1 of first drum ^

Fig. 3 is a section along line B-B of Fig. 1 of second drum

709810/0789

Fig. 4 θϊπθ representation of the underpressure Surface of the first drum with the thread of thread.

In the drawings, the same parts or parts with the same function are in each case with the same reference numbers Mistake.

The numerals in Fig. 1 and the following are: 10 is the yarn thread, which from any Uorratsstelle comes, e.g. from the supply rollers 11, driven by the Motor 12j 13 denotes the first drum, on its lower surface 14, in the embodiment shown ga under negative pressure standing, the yarn thread 10 forms the bearing 15 in layers of yarn loops, the tips 18 of the Loops 16 superimpose the previous loops 17 ;; 19 designated Then the yarn thread enters the store 15 and 19 * the exit from the store 20 denotes the turning point. direction of the perforated drum 13, uielche about the with its connected Uielle 22 is driven j 23 is the blower chamber the drum 13 with the carter 24, which in the illustrated embodiment is slightly more than half of the Drum 13 includes, wherein the carter 24 is limited in the middle of the drum 13 of the plate 25 and the support surface consists of the felt parts 26 sliding on the drum 13; 27 is the fan operated by the motor 28 in the sense of 29 ;; 30 denotes the second, perforated drum,

709810/0789

■ ■ - ■■ / - "'" ■■ -' "■■ ·. ■■ '■■ .- ■

on its surface the one coming from the first drum The yarn comes to rest upside down and forms the bearing 31, with the loops 17 and 16 in reverse order to lie-to-come3 32 denotes the direction of rotation of the drum -303. 33 is the drive for the second drum 30 via the Shaft 22; 34 is the fan combex limited by Carter 24; 35 is the area of the transition of the thread from the drum 13 on the drum 30 in the area of the smallest distance between the drums and is in the embodiment shown by the edges of the plate 25 of the carter 24 of the Drums limited; 36 indicates the normal position of the running thread, while 37 and 38 the outermost positions of the thread for a [minimal and maxima Hager represent with formation of the angle O ^; 39 is the through hole of the facfens to the process roll40, which their drive, obtained from the motor 41; 42 and 43 are the Reading devices for the yarn store 31, which in the embodiment shown consist of a piezoelectric block, which is connected to the outermost positions 37 and 38 of the running thread via ceramic rods and provides control signals, whereby instead of the piezoelectric elements optical (luminous rays - photoelectric Cells), pneumatic (air jet), electrical (micro switch) Means or combinations thereof can be used.

7098 10/078 9

-B-

Operation of the invention.

The yarn thread 10 coming from any UorratsstellB, for example to the feed rollers 11, is deposited the underpressure surface 14 of the drum 13 in predominantly superposed layers, soft due to the negative pressure generated in the chamber 23 by the blower 27.

The drum 13, which is moved counterclockwise by the motor 21, ie in the direction 20, pulls the yarn thread stored on it downwards, the bearing 15 being formed in which the later loops 16 are superimposed on the earlier loops 17. If the thread is withdrawn in this position over 19 ^f , the loops 17 and 16 are reversed due to the overlap at points 18.If the thread is to be withdrawn over 19 'without this unwinding, the positions of the loops must be reversed means that the earlier loops must overlap the later ones; this is achieved by the second drum 30, which is moved by the motor in direction 32, that is, opposite to direction 20. The yarn thread that has arrived in the region 35 is displaced with its outer, upper part onto the second drum 30, the part that is first stacked on top of the drum 13. The drum 30 rotates at approximately the same speed as the drum 13, whereby the advancement and climbing of the bearing 15 continues,

709810/0789 " ⁹ "

2837540

since there is no negative pressure above 35 in the area of the drum 13 prevails, but in the region of 35 and above the drum 30 negative pressure is generated. The one on the drum 30 displaced yarn thread forms the bearing 31, which by the opening 39 is withdrawn from the withdrawal rollers 40 in the normal removal position 36. During the withdrawal of the Yarn thread is monitored by the reading devices 42 and 43 in the warehouse, soft a withdrawal of the thread inside the UiinkelsoC formed from the minimum position 37 and the Allow lYlaximal position 38. When the bearing is below the [Ylindestu / ert sinks, the thread hits this indicator and loosens Signal from, which affects the motors 12, 21, 33 and 41 in such a way that the yarn store again accordingly is enlarged. If, in the opposite case, the bearing exceeds a predetermined one by the position of the indicator 42 Maximum value, the thread hits this indicator and releases a signal which affects the motors 12, 21, 33 and 41 so that a reduction in the yarn store 31 to the stipulated liaison takes place.

It was a preferred embodiment of the Invention represented j changes and variants sina, however possible without leaving the scope of the inventive idea. There is, for example, the possibility of changing the proportions and the shape of the individual parts

7 09810/0789 -.10-

is a reversal of the directions of rotation of the two drums possible with simultaneous reversal of the fan areas? the Can the entire surface of the second drum be exposed to a blower? it can also cover the entire surface of the first The drum is under vacuum; in this case, however, the surface of the first drum must be smaller than that of the second drum to allow movement of the thread.

The distance between the two drums in area 35 can be changed depending on the power of the fan and the strength of the thread will? the peripheral speed of rotation of the two Drums can be different in order to shift a smaller [length of thread onto the second drum? moreover is a fixed connection between the two drums is possible, e.g. via gear wheels or belt pulleys.

Instead of the drive means 12, 21, 33 and 41, a single motor can be used, the feed rollers 11, the take-off rollers 40 and the drums 13 and 30 are connected via gears, which are formed, for example, by toothed wheels can.

Claims

709810/0789 - 11 -

Claims (7)

Paten t a ns ρ r ü c he 1. Vacuum device for layering the yarn thread, wherein the device is connected to devices for supplying and withdrawing the yarn thread, g θ k en η ze i cn net d u rc h "-. a rotatable first drum (13) which is under negative pressure, which the. Yarn thread (10) receives via the feed devices (11.) and one under negative pressure, parallel to the mentioned Drum (13) mounted second drum (3D), wherein rotate the two drums in opposite directions and the second drum (3D) pulls the yarn thread (10) from the first drum (13) and wherein the yarn thread can be pulled off by the pull-off devices (4D) and on the Drum (30) reading devices (42 and 43) for size of the yarn store are arranged, which are connected to the feed directions (11), the; Extraction devices (40) and the rotatable Drums (13 and 30) are connected. 2. Vacuum device for layering the yarn thread according to claim .1, d a by g e k a η η ze i c h η e t that the area under negative pressure of the first Drum (13) and the surface under vacuum; second drum (3D) mainly from the first part on the one side and the second tail on the other side of the the axes of rotation of the drums (13 and 30) having 7 09810/07 89 " ¹² ~ - Ί2 - Surface. 3. Underpressure device for stacking the yarn thread according to claims 1 and 2, characterized in that the dBr area (35) of the crossing of the Thread in the plane of contact of the two drums (13 and 30) in the area of the smallest distance between the both lies. 4. Vacuum device for layering the yarn thread according to claim 1 or one of the following, characterized characterized in that both drums (13, 30) under negative pressure in the region (35) of the passage of the yarn thread stand. 5. Vacuum device for layering the yarn thread according to claim 1 or one of the following, characterized characterized in that in the first drum (13), following the area (35) of the thread crossing in In the sense of the direction of rotation (20) of the drum, there is a surface that is not under negative pressure. 6. Vacuum device for layering the yarn thread according to claim 1 or one of the following, characterized characterized in that the peripheral speeds of the drums (13 and 30) are uorüiiegend the same. 709810/07 8 9 - 13 - 7. Vacuum device for layering the yarn thread according to claim 1 or one of the following, characterized characterized in that the reading devices (42 and 43) for the yarn store in an advantageous manner a block made of piezoelectric material, which is connected with ceramic rods. 7098 10/0789 Blank