阅读说明：本技术 用于纺纱机牵伸装置的凝棉装置和凝棉装置的牵伸装置 (Condenser for a drafting system of a spinning machine and drafting system of a condenser ) 是由 E·尹斯 D·芬里希 于 2020-10-20 设计创作，主要内容包括：本发明涉及用于纺纱机牵伸装置的凝棉装置和凝棉装置的牵伸装置,其中用于纺纱机尤其是环锭纺纱机的牵伸装置的凝棉装置用于凝集经过牵伸的纤维条子,牵伸装置具有凝棉区,在该凝棉区内借助吸气孔(4)产生垂直于纤维输送方向的吸气流。为了提供允许制造相同的纱线的凝棉装置以及用于凝棉装置的牵伸装置而规定,在凝棉装置中设置凝棉件,其具有导向罗拉,导向罗拉在纤维输送方向上可转动地布置在凝棉区的与吸气孔(4)相对的区域内,从而使纤维条子接触到导向罗拉。(The invention relates to a condenser for a drafting system of a spinning machine, in particular a ring spinning machine, for condensing drafted fibre slivers, and to a drafting system of a condenser, which has a condenser zone in which a suction flow is generated perpendicular to the fibre transport direction by means of suction openings (4). In order to provide a condenser device which allows the same yarn to be produced and a drawing device for the condenser device, a condenser element is provided in the condenser device, which has a guide roller, which is arranged in a region of a condenser region opposite to the suction opening (4) so as to be rotatable in the fiber transport direction, such that the fiber sliver comes into contact with the guide roller.)

1. A condenser device (1) for a drafting device (2) of a spinning machine, in particular a ring spinning machine, for condensing drafted fibre slivers and having a condenser zone in which a suction flow perpendicular to the fibre transport direction is generated by means of a suction opening (4), is characterized in that a condenser element (9) having guide rollers (10) is provided, which can be rotatably arranged in the fibre transport direction in the region of the condenser zone opposite the suction opening (4) such that the fibre sliver comes into contact with the guide rollers (10).

2. The condenser (1) according to claim 1, comprising a suction block (3) having the suction opening (4), a condenser apron (5) surrounding the suction block (3) and the upper output roller (7) in the region of the suction opening (4), said condenser apron having a defined plurality of through-openings (6) allowing the passage of a suction flow and a lower output roller (8) abutting against the condenser apron (5) in the region of the upper output roller (7).

3. Cotton-condensing device (1) according to claim 1 or 2, characterized in that the condensing element (9) and/or the guide roller (10) are arranged so as to be movable towards the suction opening (4).

4. The condenser (1) according to one or more of the preceding claims, characterized in that said condenser (9) has a support (11), said support (11) being arranged so as to be longitudinally movable towards said suction opening (4).

5. The condenser (1) according to one or more of the preceding claims, characterized in that said support body (11) is mounted in a longitudinally movable manner on a support rail (12) extending towards said suction aperture (4).

6. The condenser (1) according to one or more of the preceding claims, characterized in that said guide roller (10) is connected to a drive unit that drives said guide roller (10).

7. Drafting device (2) for spinning machines, in particular ring spinning machines, characterized in that a condenser device (1) according to one or more of claims 1 to 6 is provided.

Technical Field

The invention relates to a condensing device for condensing (compact) drafted fiber slivers for a drafting device of a spinning machine, in particular a ring spinning machine, comprising a condensing zone in which a suction flow perpendicular to the fiber conveying direction is generated by means of suction openings.

Background

Many designs of drafting devices for spinning machines, in particular ring spinning machines, have been disclosed from the prior art. The aim is to draw or stretch the fiber strand fed to the drawing device, thereby reducing the cross section of the fiber. In order to produce a uniform fiber strand required for the formation of a uniform yarn, the fibers must be moved as far side by side as possible during drawing.

In spinning machines, in particular ring spinning machines, in which the twisting mechanism is directly connected to the drawing frame, there is the disadvantage that a so-called spinning triangle is set at the delivery roller pair of the drawing frame. The spinning cam has a much greater width than the yarn present and has edge fibers which are not incorporated into the yarn produced as intended and thus do not contribute to the strength of the yarn to be spun.

In order to avoid such spinning cams at the delivery roller pair of the drawing frame, it is known from the prior art to provide a condenser device downstream of the drawing frame or to design the drawing frame with a condenser device, in which the drawn but still substantially untwisted fiber slivers are collected or bundled by lateral collection of the fibers. Through avoiding appearing the spinning triangle before the fibre sliver gets into twisting mechanism that from this accomplishes, show even unanimous, anti fracture and not too hairy and fuzzy yarn that twists.

Known condenser devices of the type mentioned in the introduction are usually designed to be operated pneumatically. It is therefore known that the fibre sliver is collected by suction at a perforated belt extending along the fibre course, the perforated belt having through-holes which allow an air suction flow to pass through, through which air is sucked in by means of suction force. The perforated belt now extends in the conveying direction of the lint picker, which is arranged around the suction opening of the suction block. In an alternative arrangement, the cotton lint picket may be formed from a fine-mesh fabric having a multiplicity of through-openings which allow the suction air flow to pass through, wherein the suction block then has, in the region of the suction opening, a narrow slot which delimits the suction opening and extends in the conveying direction, through which slot only the suction force acts on the fiber sliver and compresses it.

In order to improve the yarn quality, it has already been disclosed in DE10127741C2 that, depending on the direction of transport of the sliver, a apron is provided in front of the condenser, which apron is intended to improve the fiber guidance in the condenser. However, the device has the disadvantage that it has a very complex structure and only leads to a limited improvement in the guidance of the fibers because the aprons engage in a planar manner. In particular, the processed yarn may have significant slubs and details that adversely affect yarn quality.

Disclosure of Invention

In view of this, the invention is based on the object of providing a condenser and a drafting device for a condenser, which allow uniform yarns to be produced.

The invention is achieved by a condenser and a drafting device.

The inventive condenser is characterized in that a condenser element with a guide roller is provided, which can be arranged in a rotatable manner in the fiber conveying direction in the area of the condenser zone opposite to the suction opening in such a way that the fiber sliver comes into contact with the guide roller.

According to the invention, a guide roller in contact with the fiber sliver presses the fiber sliver against the suction opening. The rotatability of the guide roller prevents the fiber sliver from rubbing against the contact surface of the guide roller, which would adversely affect the yarn quality. The guide rollers form a fiber guide which, because of its rotary movement, moves simultaneously in the transport direction of the fiber sliver. The fiber guidance provided by the guide rollers allows the production of fiber slivers with only a few knots and details. The slivers produced with the condensing device according to the invention allow the production of yarns with a very high uniformity, strength and less fuzz, which is due in particular to the fact that the slivers are also guided in the condensing zone.

The condenser device preferably comprises a suction block with a suction opening, a condenser apron surrounding the upper discharge roller and the suction block in the area of the suction opening and having defined through-openings allowing the suction air to pass through, and a lower discharge roller abutting against the condenser apron in the area of the upper discharge roller.

In this embodiment, the guide roller can be arranged so as to be rotatable in the direction of rotation of the condenser apron in the region of the suction piece opposite the condenser apron, in such a way that the fiber sliver comes into contact with the guide roller. The direction of the loop of the condenser apron predefines the direction of the fibre feed and the condenser area is in the region of the suction piece.

In this embodiment, the guide rollers, which are in contact with the fiber sliver, press the fiber sliver onto the condenser leather collar in the region of the delivery roller pair of the condenser device, which is formed by the upper delivery roller and the lower delivery roller, as a result of which a reliable fiber guidance is achieved in front of the delivery roller pair, which results in particular from the fact that the fiber sliver is only a short unguided section between the delivery roller pair and the roller pair of the drawing device located in front of the delivery roller pair. For this purpose, the fiber sliver is guided through the condenser over substantially its entire transport length, wherein this takes place first in the region of the suction block by the guide rollers and subsequently by the delivery roller pair. Thereby, the manufacture of a yarn with a high uniformity, strength and less fuzz is further supported.

The arrangement of the condenser element carrying the guide roller and the arrangement of the guide roller on the condenser element can in principle be freely selected. It is thus possible for the condenser element to be positioned in a stationary manner opposite the suction opening or the condenser apron with a constant pressing force on the fiber sliver. However, according to an advantageous embodiment of the invention, it is provided that the condenser and/or the guide roller are arranged so as to be movable toward the suction opening or the condenser apron.

According to this embodiment of the invention, it is possible to adjust the contact pressure between the guide roller and the condenser apron in an optimum manner for guiding the fibers by moving the guide roller on the condenser element and/or by moving the condenser element toward the suction opening. The pressing force can thus be reduced by increasing the distance or increased by decreasing the distance, whereby processing tolerances can be compensated in a particularly comfortable manner and an adaptation to the strength of the fiber strand can be achieved.

For adjusting the clamping force, it is possible, for example, to adjustably movably mount the guide roller on a stationarily mounted condenser. However, according to an advantageous development of the invention, it is provided that the condenser element carrying the guide roller has a support body which is arranged so as to be longitudinally displaceable toward the suction opening. According to this embodiment of the invention, the support body for supporting the guide roller opposite the condenser apron is adjustable with respect to its distance from the condenser apron and can be fixed in an adjusted position. By adjusting the displacement of the support body, the pressure applied to the condenser apron by the guide roller or the fiber sliver arranged between the condenser apron and the guide roller can thus be adjusted in a very simple and comfortable manner. The adjustment of the pressing force can be carried out in a simple manner by moving the support body relative to the cotton apron.

In this case, the design of the displaceability of the support body can in principle be freely selected. However, according to an advantageous embodiment, it is provided that the support body is mounted so as to be longitudinally displaceable on a support rail extending toward the suction opening. The use of a support rail which is designed such that the support body can only be displaced in the direction of the longitudinal axis of the support rail and which prevents a transverse movement due to the design of the connection between the support body and the support rail additionally improves the displaceability and the positionability of the guide roller relative to the condenser apron. The incorrect position of the guide roller relative to the condenser apron can be reliably avoided because the support body cooperates with the support rail, so that the yarn quality can be ensured in a reliable manner.

In principle, the free twistability of the guide rollers already ensures a high yarn quality, wherein the rotational movement of the guide rollers results from the cooperation with the fiber sliver moving in the transport direction, which causes the guide rollers to rotate. However, according to a particularly advantageous embodiment of the invention, it is provided that the guide roller is connected to a drive unit which drives it.

The use of a drive unit allows the guide rollers to be adjusted independently of the speed of transport of the fibre sliver and its cooperation with the guide rollers. By means of the drivable guide rollers, a relative movement of the fiber sliver with respect to the contact surface of the guide roller with the fiber sliver can thus be avoided in a particularly reliable manner, which allows a yarn with a very high quality to be produced.

The drawing frame according to the invention is characterized in that it has a condenser according to one or more of the preceding designs. In the drafting device of the invention, the condenser is formed, for example, by a conventional pair of delivery rollers of the drafting device, so that the drafting device can be constructed particularly simply and compactly. The condenser apron then surrounds the upper delivery roller and the suction piece of the drafting device, so that a separate pair of delivery rollers forming the condenser can be dispensed with. Alternatively, the pair of delivery rollers of the condenser device is connected to the pair of drafting device rollers, wherein they can also be designed to be compact together as a structural unit.

Drawings

Embodiments of the invention are described below with reference to the accompanying drawings, which show:

figure 1 shows a first perspective view of a drawing device with a condenser device,

figure 2 shows a second perspective view of the drafting device of figure 1,

FIG. 3 shows a side view of the drafting device of FIG. 1, and

fig. 4 shows a perspective view of the condenser of the drawing frame of fig. 1.

List of reference numerals

1 Cotton condenser

2 draft device

3 suction block

4 air suction hole

5-condensed cotton apron

6 through/via

7 output upper roll

8 output lower roller

9 cotton condensing element

10 guide roller

11 support body

12 support rail

13 air suction pipe

14 long hole

15 first roller pair

16 second roller pair

17 third roller pair

18 delivery roller pair

Detailed Description

In fig. 1, 2 and 3, a drawing device 2 equipped with a condenser device 1 is shown. The drawing frame 2 has two first roller pairs 15, second roller pairs 16 and third roller pairs 17 arranged at a distance from one another, between which the fiber sliver passing between the rollers of the roller pairs 15, 16, 17 is drawn or drafted as a result of the mutually different peripheral speeds of the roller pairs 15, 16, 17. The condenser 1 is located downstream of the third roller pair 17 and also has two spaced-apart delivery roller pairs 18, each of which is formed by a top delivery roller 7 and a bottom delivery roller 8.

The condenser 1 also has two suction blocks 3 which are arranged at a distance from one another and are arranged in the region between the delivery roller pair 18 and the third roller pair 17. The suction blocks 3 are connected to a suction device, not shown here, via suction ducts 13 and each have a suction opening 4 pointing towards the fibre sliver to be passed through. The upper delivery roller 7 and the suction block 3 are each surrounded by a lint collar 5 in such a way that the lint collar covers the suction opening 4.

In order to agglomerate the fibre sliver coming out of the third roller pair 17, the condenser apron 5 has a plurality of through-openings arranged consecutively in the transport direction, which form the perforations 6. The perforations 6 allow the suction flow provided by the suction device at the suction openings 4 of the suction block 3 to pass through, whereby the fibers of the drafted fiber sliver are directed towards the perforations 6 and simultaneously coagulated during the movement transverse to the conveying direction through the condenser device 1.

In order to improve the guidance of the fibre sliver in the region between the third roller pair 17 and the delivery roller pair 18, the drafting device 2 has a condenser 9 with two guide rollers 10 which are rotatably mounted on a support 11. The guide rollers 10 in the transport direction of the fiber sliver abut the condenser apron 5 in the region of the suction block 3 in front of the delivery roller pair 18 and simultaneously press the drafted fiber sliver against the condenser apron 5, so that good fiber guidance is achieved.

In order to adjust the contact pressure of the guide roller 10 against the apron 5, the support body 11 is mounted on a support rail 12 so as to be longitudinally displaceable in relation to the apron 5 and can be fixed in the adjusted position by means of an elongated hole 14. By adjusting the adjustable mobility of the support body 11 and the pressing force of the guide roller 10 against the condenser apron 5 that can be achieved in this way, the fiber guiding effect produced by the guide roller 10 and the condenser apron 5 can be adapted in a comfortable manner, for example, to processing tolerances and to different fiber strand strengths.