CN1780944A - Devices for loop spinning or loop twisting - Google Patents

Abstract

A device for ring spinning or ring twisting comprises a substantially vertical spindle (4) and a balloon limiter (7) mounted coaxially to the spindle (4) for carrying a thread (P) onto a hollow shaft (5) mounted on the rotating spindle (4). The balloon limiter (7) consists of an upper part (13) which is driven in rotation like the spindle (4) and a lower part (14, 14a) which is connected to the upper part in a contactless manner and does not rotate, wherein the lower part (14, 14a) has a guide surface (22, 22a) for the thread (P) which starts on the inner side of the guide surface and ends on its lower end face.

Description

Devices for loop spinning or loop twisting

technical field

The present invention relates to a loop spinning or loop twisting device comprising a substantially vertical spindle and a balloon limiter mounted coaxially with the spindle, the balloon limiting Spinners are used to deliver the wire to hollow shafts mounted on rotating spindles.

Background technique

The device described above is a variant of the device for loop spinning or loop twisting according to patent EP 0883703 B1. The balloon restrictor is in the form of a tube having a flared lower end and is rotatably mounted to be driven like a spindle in operation. In operation, the conveyed wire is moved along its inner surface by centrifugal force, from which the wire transitions directly to a hollow shaft mounted on a rotating spindle under winding tension. Due to the rotation of the balloon restrictor and the spindle, the push wire also rotates about the longitudinal axis of the spindle, so that when transitioning from the inner surface of the balloon restrictor to the hollow shaft, a rotating unrolled coil is formed which abuts against the The lower end of the balloon restrictor (also called the outlet end) turns, and this coil controls the tension of the thread in a similar way to the wire loop of a loop spinning or twisting device. In order to keep the unrolled rotating coil continuously rotating, advantageously at a lower speed than the spindle, the rotation of this coil should be braked. According to the above-mentioned patent description, the size of the expanding coil in the radial direction is limited, for example, by a non-moving limiting wall, which surrounds and partially overlaps the outlet end of the balloon limiter at defined intervals, and the rotating expanding coil is oppositely bent. In contact with the wall, or/and via a leading edge for the wound wire, which is also immovable and mounted around the longitudinal axis of the spindle below the balloon limiter, and, leading to the rotation of the hollow shaft The lower branch of the unfolded coil is in contact with the leading edge.

High-quality wire can be produced at high speed on this device. However, the increased friction of the rotating deployment coil and the balloon limiter must be taken into account, which can even lead to mutual damage. For several types of threads, especially threads made of thermoplastic fibres, the above fact even represents a limitation which is difficult to completely overcome, even with confinement walls having a smooth surface, which starts from the first contact with the thread Starting from the area of the spindle, towards the lower end, away from the longitudinal axis of the spindle (EP0933454). It has also been shown that any contact between the opposing bends of the rotating unrolling coil and the confinement wall would adversely increase the tension in the wire. Therefore, when the rotating unwinding coil is braked by the guide edge and the limiting wall installed under the balloon limiter and affecting the lower branch of the rotating unrolling coil, it is also necessary to consider that there will be a gap between the guide edge and the reciprocating spindle. A relative movement takes place, which causes a regularly repeated change in the size of the wire coil on the leading edge and thus a change in the wire tension. Even small changes in wire tension can cause damage in many cases, especially when producing thinner wires, limiting the range of use of the device. If only the guide edge is used to brake the rotating unwinding coil, not only the above-mentioned changes in wire tension must be taken into account, but also the corresponding centrifugal force at high processing speeds, which acts on the rotating unrolling coil (located between the balloon limiter and the between the leading edges of the braking wire), causing an unacceptable increase in the radial dimension of the rotating unrolled coil, thereby undesirably stretching the wire. In this case, too, restrictions on several lines are involved.

Contents of the invention

The object of the present invention is to design the above-described device in such a way that it is capable of producing high-quality wire at high processing speeds without the above-mentioned limitations.

According to the invention, this object is achieved by a balloon limiter consisting of an upper part which is rotationally driven like the spindle and a lower part which is connected contactlessly and non-rotatably to the upper part, wherein The lower part has a guide surface for the wire, which starts at the inner face of the guide face and ends at its lower end face.

Due to this arrangement, a completely freely rotating coil is formed directly under the non-rotating lower part of the balloon limiter, the rotation of which coil is expediently braked by the guide surface on the non-rotating lower part of the balloon limiter, thus The coil itself controls the thread tension. The braking effect of the guide surface on the non-rotating lower part of the balloon limiter is also positively manifested in that, together with the winding tension, it is possible to maintain the functional dimensions required in the radial direction of the rotating unwinding coil, so that for this Purpose No other measures are required. Different kinds of threads can now be produced on this device without the inevitable limitations of earlier. Also it is possible to produce a thread whose outer fibers are better aligned due to the non-rotating lower part of the balloon restrictor, so that the thread has a higher quality, especially in terms of napping.

It has also been shown that the processing speed can be further increased, since the rotating upper part of the balloon restrictor is less radially loaded than the previous one-piece balloon restrictor, and the centrifugal force component on the rotating unrolling coil is at least partially is absorbed by the non-rotating lower part of the balloon restrictor, whereas in the case of a one-piece balloon restrictor the centrifugal component exerts the full weight on the outlet end through the rotating deployment coil, thus tending to displace the outlet end from the longitudinal axis open.

Further advantageous embodiments of the invention are given by the subclaims.

Description of drawings

The drawings schematically represent embodiments of the invention. Figure 1 shows a side view of an embodiment of the device according to the invention, Figure 2 shows a partial section of Figure 1, and Figure 3 shows a partial view of another embodiment of the device according to the invention.

Detailed ways

Figure 1 shows only one device for loop-spun or loop-twisted yarn. In a corresponding machine, a plurality of such devices can be arranged as operating positions on one or both longitudinal sides, respectively. These devices include a drawing device for filaments or rovings, or a feeding device for multi-thread systems, depending on whether the device is for loop-spun or loop-twisted yarn. From the point of view of the invention, these devices each comprise a supply device 1 for the fiber material 2 to be spun or twisted. Below the feeding device 1 represented by a pair of conveying rollers 3 in FIG. On the hollow shaft 5 that feeds the thread P onto the rotating spindle 4 . A thread guide 8 is arranged between the feed device 1 and the balloon limiter 7 for adjusting the thread P into the balloon limiter 7 or the longitudinal axis 9 of the spindle 4 . In another not-illustrated embodiment of the inventive solution, the feeding device itself can also be used to adjust the wire, and for this purpose is installed, for example, so that the lower conveying roller takes up the position of the wire guide, thereby completely replacing it.

The spindle 4 forms the rotor of an electric motor 10 mounted on a roving frame 11 . The roving frame 11 extends to all operating positions of the machine, which are equipped with common program-controlled drives (not shown) for the formation of new coils 6 , enabling upward and downward movements in the direction of the double arrow 12 . Alternatively, it is obviously also possible to mount the spindle in rotation on a similar roving frame in a known manner, the rotation being conducted by a tangential belt, which likewise extends to all operating positions of the machine (not shown).

The balloon limiter 7 consists of an upper part 13 and a lower part 14 which is connected without contact with the upper part. This upper part is, for example, bell-shaped or bottle-shaped, having a continuous surface 15 in contact with the line P and widening conically towards the outlet end 16 . The part that constricts on the side of the entry end 17 forms a shaft 18 , via which this part is rotatably mounted in a bearing assembly 19 and driven by an electric asynchronous motor 20 . The bearing assembly 19 and the motor 20 are housed in a housing fixed on a support base 21, which will be described in detail below. Similar to the roving frame 11, the support base 21 is installed in all operating positions of the machine, differing from the roving frame 11 in that the support base is stationary.

The lower part 14 of the balloon limiter 7 (see FIG. 2 ) is in the shape of a ring 26 and is connected at its end face to the outlet 16 of the upper part 13 . This part 14 has a turning guide surface 22 for the wire P starting at its inner face and ending at its lower end face. In this embodiment, the guide surface 22 is optionally curved towards the balloon limiter 7 or the longitudinal axis 9 of the spindle 4, measured on a plane at right angles to the balloon limiter 7 or the longitudinal axis 9 of the spindle 4 The smallest diameter, A, is smaller than the largest diameter, B, of the inner surface 15 of the upper portion of the balloon restrictor 7 . The guide surface 22 is in the shape of a continuous curve, but may have other shapes if desired, for example as part of the outer surface of a corrugated tube. The entire lower part 14 of the balloon limiter 7, or at least its part in contact with the wire, can be made of commercially available tool steel, not only by machining or by precision manufacturing, but also by die forging and subsequent adjustment of the height of the guide surface 22. Polishing is performed. However, in order to increase the service life, at least the guide surface 22 should be made of a particularly wear-resistant material (for example technical ceramics).

In order to maintain a firm positional relationship between the upper part 13 and the lower part 14 (FIG. 1) of the balloon limiter 7, the lower part 14 is mounted inside the bracket 23, for example by a screw connection or by a clamp as described below with reference to FIG. 3 etc. Connected, this support is like a pipe, surrounds the balloon limiter 7, that is, not only surrounds its upper part 13, but also surrounds its lower part 14, and the support is fixed on the bearing seat 21 with its upper end, and the support 23 is placed on the balloon The upper part 13 of the limiter 7 also forms a housing for the bearing assembly 19 and the electric motor 20 .

In operation, the upper part 13 of the balloon limiter 7 is driven like the spindle 4 with the winding hollow shaft 5 and the wire coil 6 (on the hollow shaft 5 ) ( FIGS. 1 and 2 ). The thread P is conveyed through the balloon limiter 7 to the hollow shaft 5 or the coil 6 on the hollow shaft 5, the thread is forced to be pushed by centrifugal force, first along the inner surface of the upper part 13 of the balloon limiter 7 rotation 15 moves and is then guided directly onto the hollow shaft 5 or coil along the guide surface 22 of the non-rotating lower part 14. Due to the rotation of the upper part 13 of the balloon limiter 7 and the spindle 4, the thread P is pushed and also rotates around the longitudinal axis 9 of the spindle 4, so that at the transition from the lower part 14 of the balloon limiter 7 to the hollow When on shaft 5 or coil 6, a rotating unwinding coil Ps is formed which turns directly under the lower part 14 of the balloon restrictor (FIG. 2). Since the unwinding coil Ps is completely free, it controls the tension of the wire P itself. In this way, in response to the change of the diameter of the coil 6, the tension in the radial direction also changes automatically, so the centrifugal force acting on it also changes. . The centrifugal force acting on the rotating unfolding coil Ps also supports in a useful manner the transition of the wire P to the guide surface 22 of the non-rotating lower part 14 of the balloon limiter 7 . At the same time, the guide surface 22 also acts as a brake to influence the rotating unwinding coil Ps, in this way, the rotating unwinding coil Ps is also braked when it rotates around the longitudinal axis 9 of the balloon limiter 7 or the spindle 4, so that Its rotational speed is always advantageously lower than that of the spindle 4 . The braking effect of the guide surface 22 need not be particularly large, because for the deceleration required when the rotating unwinding coil Ps rotates, it is sufficient that only a small part of the kinetic energy is absorbed by the friction on the guide surface 22 . Furthermore, by means of this braking action, in combination with the winding tension, also in the radial direction, the dimensions in which the rotating unrolled coil Ps acts are maintained. When winding on the hollow shaft 5, the thread P is conducted along the hollow shaft 5 onto the coil 6 by the usual programmed movement of the roving frame 11 up and down in the direction of the double arrow 12.

In the illustrated embodiment, the smallest diameter A of the guide surface 22 of the lower portion 14 of the balloon restrictor 7 is smaller than the largest diameter B of the inner surface 15 of the upper portion of the balloon restrictor 7 . Thus, the component of the centrifugal force acting on the rotating unrolling coil Ps is absorbed on the face of the balloon limiter 7 by the non-rotating lower part 14 of the balloon limiter 7, and the upper part 13 of the balloon limiter 7 is only slightly radially loaded , manipulated by an energy input sufficient to maintain a given operating speed. Since the upper part 13 of the balloon limiter 7 is not strongly rubbed by the wire P at its outlet end 16, this part 13 can also be made of a material that is very light and has less resistance to the wear of the wire P, such as made of It is made of duralumin, but it can also be made of suitable industrial plastic materials which are relatively cheap and easy to process. This design results in a low-mass upper portion 13 of the balloon restrictor 7, whose dynamics are improved in the range of harmonic frequencies shifted towards higher operating revolutions. The bearing assembly 19, in which the shaft 18 of the upper part 13 of the balloon limiter 7 is housed, only loads the mass of its own rotating body, which is advantageous from a service life point of view.

FIG. 3 partly shows another embodiment of the present invention, assuming that other components not shown are the same as those shown in FIG. 1 . As shown, the lower portion 14a of the balloon restrictor 7 is part cylindrical tubular with a space allowing it to move freely, the portion 14a coaxially surrounds and partially overlaps the upper portion 13 of the balloon restrictor 7 . This part 14a is similar to the lower part 14 of the balloon limiter 7 in FIGS. . This part 14a is movably mounted in a bracket 23a, the design of which corresponds to the bracket 23 of the lower part 14 of the balloon limiter in FIG. 1 . The only difference is that the lower end of the lower part 14a of the bearing balloon limiter 7 forms an elongated slotted clamping sleeve with radially protruding end clips 24 which can be secured by means of screws 25 or other known fasteners. It's pulled together.

Of course, the bracket 23 carrying the lower part 14 in FIG. 1 can also be installed in a similar manner. The possible mounting and fixing types of the lower part 14 , 14 a of the balloon limiter 7 in the bracket 23 , 23 a are therefore by no means exhaustive. It is important in each case to find a way to ensure a fixed positional relationship between the lower part and the upper part of the balloon restrictor 7 and, at the same time, to ensure that one lower part of the balloon restrictor is adapted to the other, e.g. and/or the lower part of the thinness line P, and relative to the outlet 16 of the upper part 13 of the balloon restrictor 7, the outlet end of the lower part 14, 14a of the balloon restrictor 7 can also be axially adjusted as much as possible 26, 26a.

reference sign

1 feeding device

2 fiber material

3 delivery rollers

4 spindles

5 hollow shaft

6 wire coil

7 balloon limiter

8 wire guide

9 vertical axis

10 electric motor

11 woolen machine

12 double arrows

13 upper part

Part 14

14a lower part

15 surfaces

16 out

17 entry

18 axis

19 bearing assembly

20 electric motor

21 support seat

22 guide surface

23 brackets

24 end clamp

25 screws

The end of the lower part of 26

The outlet of the lower part of 26a

P line

Ps coil

A the smallest diameter

B largest diameter

Claims (5)

1. the device of coil spinning or circle twist yarn, this device comprises the air sphere limiter (7) of the spindle (4) of a perpendicular and and the coaxial installation of this spindle (4), this air sphere limiter is used for line (P) is transported to the hollow shaft (5) that is installed on the rotation spindle (4), it is characterized in that, this air sphere limiter (7) by one with the top (13) of the same rotating drive of spindle (4) with one with the contactless lower part that is connected and does not rotate (14, this top, 14a) form, this lower part (14 wherein, 14a) has the spigot surface (22 that is used for line (P), 22a), this line begins and finishes in its lower surface at the inner face of spigot surface.

2. according to the device of claim 1, it is characterized in that the lower part of the air sphere limiter (7) on spigot surface (22,22a) (14,14a) are to be made by a kind of anti-abrasive material at least.

3. according to the device of claim 1 or 2, it is characterized in that, spigot surface (22) is towards the radial direction bending of spindle (4) longitudinal axis (9), with the rectangular plane of the longitudinal axis (9) of spindle (4) on record the maximum gauge (B) that minimum diameter (A) equals the inner surface (15) on air sphere limiter (7) top (13) at the most.

4. according to the device of one of claim 1～3, it is characterized in that the lower part of this air sphere limiter (7) (14,14a) are provided with support (23,23a), by this support, with respect to top (13) in the axial direction adjustable ground lay the lower part.

5. according to the device of claim 4, it is characterized in that this support (23,23a) is the bear box on air sphere limiter (7) top (13) and the part of motor field frame.

Images