EP4180558A1 - Dispositif indicateur pour un dispositif de compactage sur un métier à filer - Google Patents

Dispositif indicateur pour un dispositif de compactage sur un métier à filer Download PDF

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Publication number
EP4180558A1
EP4180558A1 EP22205460.3A EP22205460A EP4180558A1 EP 4180558 A1 EP4180558 A1 EP 4180558A1 EP 22205460 A EP22205460 A EP 22205460A EP 4180558 A1 EP4180558 A1 EP 4180558A1
Authority
EP
European Patent Office
Prior art keywords
display
channel
duct
suction air
section
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP22205460.3A
Other languages
German (de)
English (en)
Other versions
EP4180558B1 (fr
Inventor
Dieter Dalitz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RIETER AG
Original Assignee
Maschinenfabrik Rieter AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Publication of EP4180558A1 publication Critical patent/EP4180558A1/fr
Application granted granted Critical
Publication of EP4180558B1 publication Critical patent/EP4180558B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/60—Arrangements maintaining drafting elements free of fibre accumulations
    • D01H5/66—Suction devices exclusively
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/70—Constructional features of drafting elements
    • D01H5/72—Fibre-condensing guides
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D01H1/02—Spinning or twisting machines in which the product is wound-up continuously ring type
    • D01H1/025—Spinning or twisting machines in which the product is wound-up continuously ring type with a condensing device between drafting system and spinning unit
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/14—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements
    • D01H13/16—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material
    • D01H13/1616—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material characterised by the detector
    • D01H13/1683—Pneumatic sensing means

Definitions

  • the invention relates to a device for compressing a sliver on a spinning machine with a rotating compressing element which is subjected to suction air and is held in a housing, the suction air being guided to the compressing element via a suction air duct provided in the device with a first section and a second section, wherein the first section of the suction air channel is delimited by the compression element and a connection of the first section to a vacuum source is provided via the second section of the suction air channel.
  • a compacting device being arranged downstream for compacting (compacting) the fiber material (fiber strand) delivered by a drafting unit.
  • the compressed fiber material is fed to a twist-generating device after it has passed a nip point.
  • a twist generating device consists z. B. in a ring spinning machine from a runner that rotates on a ring, wherein the yarn produced is wound onto a rotating sleeve.
  • suctioned, circulating, perforated suction drums or circulating, perforated aprons are used as compression devices.
  • a special suction area is defined on the compression element using appropriate inserts within the suction drum or within the peripheral aprons.
  • Such operations can z. B. be provided with appropriately shaped suction slots, to which a negative pressure is applied, whereby a corresponding air flow is generated at the periphery of the respective compression element.
  • This air flow which is essentially aligned transversely to the direction of transport of the fiber material, also binds in particular protruding fibers.
  • Generic devices for compressing a sliver are for example from CH 704 137 A1 or the CH 705 307 A1 known.
  • the invention is therefore based on the object of proposing a device for the simple display of the loading of the compression element with suction air.
  • a device for compressing a sliver on a spinning machine with a compressing element which is subjected to suction air and rotates and which is held on a housing, the suction air being guided to the compressing element via a suction air duct provided in the housing with a first section and a second section, wherein the first section of the suction air channel is delimited by the compression element and a connection of the first section to a vacuum source is provided via the second section of the suction air channel.
  • An air duct independent of the suction air duct is provided with a first duct part, a display duct and a second duct part, the display duct being arranged between the first duct part and the second duct part and being at least partially transparent and the first duct part being connected to the first section of the suction air duct and the second channel part is connected to the environment with an opening in the housing and a display element that can move freely over the length of the display channel is provided in the display channel.
  • suction drums or sieve aprons can be used as circulating compression elements.
  • Suction air is applied to the compression element through a suction air duct, which is connected to a vacuum source.
  • the negative pressure source can be designed as a channel running along a spinning machine, to which the suction air channel of the individual compression device is connected.
  • This suction air channel is held in a housing at least in the area of the compression element or is formed by the housing itself.
  • the suction air duct consists of two sections, with a first section adjoining the compression element and the suction air thus passing through the compression element from the vicinity of the compression element by the vacuum source is sucked in.
  • the first section of the suction air duct is thus designed with an opening towards the compression element. Due to the design of the compression element, there is a corresponding limitation of the opening of the suction air channel.
  • the air duct which is independent of the suction air duct, can be integrated in the housing or provided separately from the housing. Designs are also conceivable in which parts of the air duct, such as the display duct, are at least partially formed by a housing wall.
  • the air duct is connected to the suction air duct in the region of the compression element via a first duct part and to the environment via a second duct part, with the display duct being arranged between the first and second duct parts.
  • the first duct part creates a connection of the display duct with the first section of the suction air duct.
  • a connection point of the first duct part of the air duct with the first section of the suction air duct is advantageously arranged close to the delimitation of the suction air duct by the compression element.
  • the opening provided in the housing for the connection of the second duct part of the air duct is provided at a point on the housing which on the one hand is not covered by other units and on the other hand enables simple duct routing.
  • the opening in the housing can lead to a chamber located in the housing, from which the connection to the display channel takes place.
  • the channel routing as well as the geometric shape of the second channel are not essential as long as there is a connection to the environment.
  • the second channel can have a smaller diameter at the connection to the display channel than at the connection to the opening or can have a widening between the intake channel and the opening in the housing. In the case of a widening to form a chamber, there is the possibility that the second channel part of an adjacent device is connected with its second channel part to the same widening or chamber.
  • the geometric shape of the display element provided in the display channel and freely movable over the length of the display channel is adapted to an internal free cross section of the display channel, so that the element can be moved through the display channel by the suction air flow without the display element becoming wedged in the display channel. It is also important to ensure that with the suction air flow through the opening to the first section of the suction air duct applied to the display element, a stable position of the display element within the display duct is achieved. Because of this, it is advantageous if the display element is made from a lightweight plastic. A position of the display element can then be used to determine whether or not there is a vacuum in the first section of the suction air duct.
  • the display element in the display duct is moved in the direction of the first duct part and remains in a position of the display duct at which the display duct merges into the first duct part. If the negative pressure on the compression element drops, for example due to a lack of or insufficient application of negative pressure to the suction air duct or a blockage in the suction air duct, the display element in the display duct is moved in the direction of the second duct part and remains in a position of the display duct at which the display duct enters the second channel part passes.
  • the geometric arrangement of the display channel is to be provided depending on its structural design. If the negative pressure in the first section of the suction air duct falls below a specific limit value at the point where the first duct part is connected, the display element should move from one end of the display duct to the other end of the display duct. This can be done, for example, by the influence of gravity if the display channel is arranged accordingly in space, with the weight of the display element having to be matched to the limiting value of the negative pressure.
  • the display element is moved against a spring by the applied negative pressure, so that when the negative pressure drops, the display element is transferred by the spring into a specific position in the display channel.
  • the display channel is preferably delimited by the housing on at least one side and the housing is transparent in a region of the display channel.
  • the display element is visible through the transparent housing from the outside of the housing. Integrating the display channel into the housing has the advantage that fewer components have to be used and cost-effective production is possible. Used by the transparent area only If part of the display channel is visible, this has the advantage that it can be arranged in such a way that the part of the display channel in which the display element is located is visible when there is a fault or the negative pressure on the compression element has fallen below a certain limit value.
  • part of the display channel is covered by other components provided on the housing, for example the compression element. For an operator of the spinning machine, this means that as soon as the display element is visible, there is a fault and the corresponding compression device must be cleaned or replaced.
  • the display duct is designed in such a way that the display element is arranged on an end of the display duct facing towards the second duct part when the first section of the suction air duct is in a pressureless state.
  • This design has the advantage that if there is negative pressure at the point where the first duct part is connected to the sag air duct, the display element is sucked against the first duct part of the air duct and thus leaves a defined position for displaying a fault.
  • a position of the display element in the display channel which corresponds to a negative pressure for a rule-compliant operation of the compression device, does not necessarily have to correspond to an end position of the display element in the display channel in this design. As a result, it is easy to distinguish between an only slight drop in the negative pressure and falling below a limit value for the negative pressure.
  • the display element is arranged on an end of the display channel facing towards the first channel part when the first section of the suction air channel is in a state in which suction air is applied.
  • the display channel with the display element is designed in such a way that the display element is at one end of the display channel during normal operation and at the other end of the display channel in the event of a fault, clear and simple allocation of the display is always possible.
  • the display element remains between the two end positions, it can be used to display a malfunction of the device for displaying a fault.
  • the display element preferably provides at least a partial closure of the display channel against the first channel part. Since the display channel is connected to the environment via the second channel part on one side and to the suction air channel on the other side via the first channel part, the negative pressure prevailing in the suction air channel results in a constant flow of air through the air channel. In order to reduce or completely prevent this air flow, which is unnecessary for operation of the compression device, it is advantageous if the indicator element, held by the prevailing negative pressure in the first duct part, is used to seal the transition from the indicator duct into the first duct part. Due to the large number of compression devices in a spinning machine, a considerable saving in energy consumption is already achieved by a partial seal by reducing the constant air flow.
  • the first channel part has a smaller cross-section than the display channel. Due to the fact that the design of the cross sections of the various channel parts is correspondingly coordinated with one another, the display element does not get into the first channel part or can become wedged in the transition from the display channel to the first channel part. Furthermore, it is also advantageous if the second channel part has a smaller or at least differently shaped cross section than the display channel, so that the display element cannot leave the display channel.
  • the display element is colored to make it visible.
  • coloring the display element for example with a luminous color or a contrasting color to the transparent housing or display channel, a fault can be displayed at first glance and even from a greater distance.
  • the indicator is a sphere. Due to the movements of the indicator element within the indicator channel, it has been found that a sphere is the least prone to jamming when turbulence occurs.
  • a sensor for determining a position of the display element.
  • a sensor By equipping it with a sensor, it becomes possible to set up a detection of a fault by a control system or a higher-level monitoring system. It is possible to switch off individual spinning stations of a spinning machine that are affected by non-functional compression. Operators can also be alerted to a malfunction with alarm signals activated by the sensor that can be seen or heard from afar.
  • the opening of the second channel part in the housing to the environment is provided with a filter.
  • the filter prevents fiber dust or other foreign bodies from the environment from penetrating the air duct or the display duct and preventing the display element from moving freely, as a result of which it would not be possible to display a fault reliably.
  • the filter is detachably or fixedly connected to the housing to cover the opening of the second duct part in the housing.
  • a spinning machine with a device for compressing a sliver according to the above description is also proposed.
  • figure 1 shows a schematic representation of a spinning station 15 of a ring spinning machine with a drafting unit 16 and a subsequent compression device with a compression element 2 according to the prior art.
  • a fiber material in the form of a roving 17 fed to the drafting system unit 16 is subjected to a draft between the roller pairs of the drafting system unit 16 and leaves the drafting system unit 16 as sliver 1.
  • the sliver then arrives at an output bottom roller 18 of the drafting system unit 16 and reaches the compression element 2 figure 1 the compression element 2 is shown as an example in the form of a screen drum, which is driven by the output bottom roller 18 .
  • the sliver 1 drafted by the drafting unit 16 is deflected downwards by the lower exit roller 18 and reaches the area of a first suction section 5 of a suction air duct 4 of the subsequent compression element 2.
  • the compression element 2 is provided with perforations or suction openings 29 running on its circumference.
  • the stationary mounted first section 5 of the suction air duct 4 is arranged within the rotatably mounted compression element 2 .
  • the fiber sliver is held on the compression element 2 with the aid of the suction air and guided up to a pinch roller 19 . After the pinch roller 19, the fiber sliver 1 is fed in the conveying direction in the form of a compacted thread 20 to a ring spinning device shown schematically, with rotation being imparted.
  • a yarn guide 21 is arranged between a clamping line formed by the compression element 2 and the clamping roller 19 and the runner 24 .
  • the ring 23 is attached to a ring frame 22, the ring frame 22 performing an up and down movement 28 during a spinning process.
  • the spindle 26 is held stationary and rotatable in a spindle rail 25 .
  • the compression element 2 is rotatably held in a housing 3 .
  • the housing 3 in turn is held on a duct, the duct representing the vacuum source 7 by way of example.
  • a suction air duct 4 is provided inside the housing 3 .
  • the suction air duct 4 consists of a first section 5, which for Compression element 2 leads, and a second section 6, which connects to the vacuum source 7 produces.
  • FIG figure 2 shows a schematic representation of the compression device according to FIG figure 1 , viewed in direction X, with an air duct 8 according to the invention.
  • two compression elements 2 are shown, which are held by a common housing 3.
  • the compression elements 2 are mounted with a bearing 32 on an axis 31 held in the housing 3 in a torque-proof manner.
  • a friction wheel 29 is provided on the compression element 2, which rests on an output bottom roller 18 and causes the compression element 2 to rotate.
  • the exit bottom rolls 18 are driven by a common shaft.
  • a fiber sliver 1 arriving via the lower output rollers 18 is guided around the compression element 2 and leaves this as a compacted thread 20 in the direction of the spinning station 15 (see Fig figure 1 ).
  • the compression element 2 is provided with suction openings 30 in the area of the sliver 1 .
  • a suction air duct 4 is integrated in the housing 3 .
  • the first section 5 of the suction air duct 4 borders on the compression element 2 at the point at which the compression element 2 has the suction openings 30 .
  • the second section 6 of the suction air duct 4 is connected to a vacuum source 7 via a connection 35 .
  • the vacuum source 7 is shown as a vacuum channel. Due to the negative pressure prevailing in the suction air duct 4, air is drawn in through the suction openings 30 of the compression element 2 and as a result a suction air flow 34 is produced from the compression element 2 to the negative pressure source 7.
  • An air duct 8 is also provided in the housing 3.
  • the air duct 8 is connected with a first duct part 9 to the first section 5 of the suction air duct 4 and its second duct part 11 communicates with the environment via an opening 12 in the housing 3 .
  • a display channel 10 is provided between the first channel part 9 and the second channel part 11 .
  • a display element 14 is installed in this display channel 10 and is arranged in the display channel 10 so that it can move freely.
  • the indicator element 14 is shown as a sphere and is located in the illustrated embodiment at the lower end of the indicator channel 10, this is the case when in the first section 5 of the Suction air duct 4 at the point of connection to the first duct part 9 of the air duct 8 there is little or no negative pressure.
  • FIG 3 shows a schematic representation of an embodiment of an air duct 8 according to the invention.
  • the housing 3 of the compression device with the suction air duct 4 arranged in the housing 3 is shown.
  • the compression element 2 is provided with suction openings 30 in the area of the first section 5 of the suction air channel 4 .
  • a second section 6 of the suction air duct 4 is connected to a vacuum source (not shown).
  • the negative pressure source creates a suction air flow 34 in the suction air channel 4 , which causes ambient air to be sucked in through the suction openings 30 of the compression element 2 .
  • the air duct 8 is also shown, which is composed of the first duct part 9, the second duct part 11 and the display duct 10 lying between them.
  • the first duct part 9 of the air duct 8 is connected to the first section 5 of the suction air duct 4 .
  • the second duct part 11 of the air duct 8 is connected to the environment at an end opposite the display duct 10 via an opening 12 in the housing 3 . This results in a suction effect in the air duct 8 from the opening 12 to the first section 5 of the suction air duct 4 when the suction air flow 34 is applied .
  • the display element can be moved freely over a length 13 of the display channel 10 and is located at a specific point in the display channel 10 depending on the prevailing negative pressure in the first section 5 of the suction air channel 4.
  • a transparent window 36 is provided in the housing 3, through which part of the display channel 10 is visible.
  • the display channel 10 is arranged in such a way that when there is little or no negative pressure in the first section 5 of the suction air channel 4 , the display element 14 reaches that area of the display channel 10 which is visible from the outside through the transparent window 36 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Preliminary Treatment Of Fibers (AREA)
EP22205460.3A 2021-11-10 2022-11-04 Dispositif de compactage sur un métier à filer Active EP4180558B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH070533/2021A CH719132A1 (de) 2021-11-10 2021-11-10 Verdichtungsvorrichtung an einer Spinnmaschine mit einem Anzeigeelement.

Publications (2)

Publication Number Publication Date
EP4180558A1 true EP4180558A1 (fr) 2023-05-17
EP4180558B1 EP4180558B1 (fr) 2024-08-28

Family

ID=84246084

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22205460.3A Active EP4180558B1 (fr) 2021-11-10 2022-11-04 Dispositif de compactage sur un métier à filer

Country Status (3)

Country Link
EP (1) EP4180558B1 (fr)
CN (1) CN116103799A (fr)
CH (1) CH719132A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1006224A2 (fr) * 1998-12-04 2000-06-07 Zinser Textilmaschinen GmbH Procédé et dispositif pour la production de fil condensé
DE10022428A1 (de) * 2000-05-09 2001-11-15 Stahlecker Fritz Spinnmaschine mit einer Vielzahl von Spinnstellen
CN201125291Y (zh) * 2007-11-20 2008-10-01 常德纺织机械有限公司 带气动牵伸装置的环锭纺纱机
EP2161356A1 (fr) * 2008-09-03 2010-03-10 Maschinenfabrik Rieter Ag Machine à filer doté d'un dispositif de condensation pneumatique
CH704137A1 (de) 2010-11-26 2012-05-31 Rieter Ag Maschf Vorrichtung zum Verdichten eines Faserverbandes an einer Spinnmaschine sowie Spinnmaschine.
CH705307A1 (de) 2011-07-25 2013-01-31 Rieter Ag Maschf Spinnmaschine mit einer Verdichtungsvorrichtung.
DE102017130215A1 (de) 2017-12-15 2019-06-19 Maschinenfabrik Rieter Ag Streckwerk für eine Spinnereimaschine

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4559834A (en) * 1984-08-30 1985-12-24 Dwyer Instruments, Inc. Multipurpose flowmeter arrangement
DE19720116C1 (de) * 1997-05-14 1998-04-16 Skf Textilmasch Komponenten Leckage-Überwachungseinrichtung für eine Ringspinnmaschine

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1006224A2 (fr) * 1998-12-04 2000-06-07 Zinser Textilmaschinen GmbH Procédé et dispositif pour la production de fil condensé
DE10022428A1 (de) * 2000-05-09 2001-11-15 Stahlecker Fritz Spinnmaschine mit einer Vielzahl von Spinnstellen
CN201125291Y (zh) * 2007-11-20 2008-10-01 常德纺织机械有限公司 带气动牵伸装置的环锭纺纱机
EP2161356A1 (fr) * 2008-09-03 2010-03-10 Maschinenfabrik Rieter Ag Machine à filer doté d'un dispositif de condensation pneumatique
CH704137A1 (de) 2010-11-26 2012-05-31 Rieter Ag Maschf Vorrichtung zum Verdichten eines Faserverbandes an einer Spinnmaschine sowie Spinnmaschine.
CH705307A1 (de) 2011-07-25 2013-01-31 Rieter Ag Maschf Spinnmaschine mit einer Verdichtungsvorrichtung.
DE102017130215A1 (de) 2017-12-15 2019-06-19 Maschinenfabrik Rieter Ag Streckwerk für eine Spinnereimaschine

Also Published As

Publication number Publication date
CH719132A1 (de) 2023-05-15
EP4180558B1 (fr) 2024-08-28
CN116103799A (zh) 2023-05-12

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