Classifications

• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
  • D01G15/00—Carding machines or accessories; Card clothing; Burr-crushing or removing arrangements associated with carding or other preliminary-treatment machines
  • D01G15/02—Carding machines
  • D01G15/12—Details
  • D01G15/40—Feeding apparatus
• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
  • D01G9/00—Opening or cleaning fibres, e.g. scutching cotton
  • D01G9/14—Details of machines or apparatus
  • D01G9/16—Feeding arrangements
• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
  • D01G15/00—Carding machines or accessories; Card clothing; Burr-crushing or removing arrangements associated with carding or other preliminary-treatment machines
  • D01G15/02—Carding machines
  • D01G15/12—Details
  • D01G15/14—Constructional features of carding elements, e.g. for facilitating attachment of card clothing
  • D01G15/20—Feed rollers; Takers-in
• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
  • D01G31/00—Warning or safety devices, e.g. automatic fault detectors, stop motions
  • D01G31/003—Detection and removal of impurities

Definitions

• the present invention relates to a feed trough for a feed device for feeding fiber flakes into a spinning preparation machine, comprising a base body and at least one elastic lip extending along a working width of the feed trough and a feed device for feeding fiber flocks into a spinning preparation machine with a feed roll and a feed trough.
• a feed trough for a feed device is known.
• the feed trough has a fastened to a support member, gap-forming element which is formed elastically deformable.
• at least larger foreign bodies do not penetrate to the elastic zone. Such bodies are clamped before the elastic edge zone between the gap-forming element and the feed roller.
• the feed trough rotates as a whole against the bias of a spring about an axis. This fact is detected by a sensor and thus the foreign body is detected. The foreign body detection can then lead, for example, to stop the drive for the feed roller and / or to trigger an alarm. The foreign body does not penetrate to the elastic zone.
• a disadvantage of the said feed trough is that the entire feed trough must be rotatable about an axis. Since the gap formed by the gap-forming element must have a precise width in order to clamp the fiber material in the desired thickness, the feed trough must also be positioned exactly. In conjunction with a feed trough formed rotatable about an axis, this means a considerable design effort.
• the object of the present invention is therefore to provide a feed trough which allows a gap with a precise width and at the same time requires less design effort.
• the object is achieved by a feed trough and a feed device with the features of the independent claims.
• a feeding trough for a feed device for feeding fiber flakes into a spinning preparation machine is proposed.
• the spinning preparation machine can be a card, a carding machine or a cleaner.
• the feed trough has a main body and at least one extending along a working width of the feed trough elastic lip. The elastic lip forms a gap between itself and a feed roller of the feed device.
• a support strip extending along the working width is arranged on the base body.
• the support strip is arranged at a distance from the elastic lip and the distance is such that it can be closed by elastic deformation of the lip. If there were no support bar, a very large foreign body could deform the elastic lip so much that it leaves the elastic area and then does not return to its previous shape. The support bar prevents this and thus allows a longer life of the elastic lip. Movable elements are thus not necessary for the overstretch protection, which keeps the design effort low and simplifies the installation and replacement of the elastic lip.
• the elastic lip made of steel, in particular chromium steel, since these materials have good elasticity with a good spring strength. Chrome steel is also corrosion resistant.
• a wall thickness of the elastic lip at its front end is preferably between 1 .0 mm and 4.0 mm and more preferably between 1, 5 mm and 2 mm, as this provides the necessary spring strength.
• the support strip made of aluminum, since it has a high dimensional stability with a low weight.
• the elastic lip and the support bar enclose a cavity which, inter alia, allows the flexibility of the elastic lip. So that this cavity is not contaminated, a seal is advantageously arranged between the elastic lip and the support strip. This seal can be so far deformable that it can be suppressed in a deformation of the elastic lip.
• a spacer strip is arranged between the main body of the feed trough and the elastic lip.
• the spacer strip is preferably exchangeable and / or adjustable. For particularly large fiber lengths, above about 28 mm, then can be completely dispensed with the spacer bar.
• the support strip is associated with a contact surface and the feed trough has electrical and / or electronic connections for detecting a contact between the elastic lip and the contact surface.
• Such contact between the elastic lip and the contact surface occurs when there is a hard foreign body in the fiber material, which deforms the elastic lip so far that it just touches the contact surface. The contact thus indicates a hard foreign body in the fiber material.
• an audible and / or visual alarm can be triggered, which indicates the operator to the foreign body.
• a feeding roller of the feeding device is automatically stopped so that the foreign matter does not get further under the elastic lip and then possibly cause damage to the feeding device.
• the feed roller can then be rotated back by a predetermined or predetermined angle, which promotes the foreign body back and simplifies the removal of the foreign body by the operator.
• the elastic lip is electrically insulated from the contact surface. Then, the elastic lip and the contact surface can be arranged as two ends of an open circuit with a voltage source and a current measuring device. If the elastic lip then comes into contact with the contact surface, the current circuit is closed and the flowing current is measured by the current measuring device.
• a piezoelectric element may be provided which is attached to the elastic lip and / or to the contact surface. Piezoelectric elements are also inexpensive, reliable and largely maintenance-free. In a contact between the elastic lip and the contact surface, a pressure is then exerted on the piezoelectric element, which in turn results in an electrical voltage, which is detected by a sensor.
• each segment is assigned an elastic lip.
• each segment is associated with a piezoelectric element or the individual segments associated elastic lips are electrically isolated from each other and assigned to separate circuits. So it is separately possible for each segment to recognize a foreign body. If this is indicated to the operating personnel, the search for the foreign body is simplified, the foreign body can therefore be removed faster and production can be continued more quickly.
• the feed trough is formed according to the preceding description, wherein said features may be present individually or in any combination.
• a feeding device for feeding fiber flakes in a spinning preparation machine in particular a card, a carding or a cleaner, proposed.
• the feed device has a feed roller and one as above described food trough on.
• the feed trough has a base body, at least one elastic lip extending along a working width of the feed trough and a support strip extending along the working width. This reduces the design effort and the elastic lip can be adjusted more easily.
• FIG. 1 shows a schematic side view of a carding machine
• FIG. 2 shows a schematic side view of a feeding device
• FIG. 3 shows a schematic side view of a further feed device
• Figure 4 is a schematic side view of another feed device
• Figure 5 is a schematic side view of another feed device
• Figure 6 is a schematic front view of a feed trough.
• Figure 1 shows a schematic side view of a card 1.
• the fibers are transported in the carding machine 1 from left to right.
• a fiber mat 2 first passes over a feed plate 3 and then enters a feed device 4.
• the feed device 4 has a feed trough 5, which interacts with a feed roller 6.
• the fiber mat 2 clamped between the feed trough 5 and the feed roller 6 is then fed to a licker-in roller 7.
• the nonwoven fabric continues on a spool 8 and is further processed between the spool 8 and a lid 9 shown here very schematically.
• the nonwoven fabric is then removed from a doffer roller 10 and forwarded to a compaction unit 11, where it is compacted into a card sliver 12.
• FIG 2 shows a schematic side view of a feed device 4 according to the invention.
• This feed device 4 may be part of the carding machine 1 shown in Figure 1, but it may also be part of a carding machine or a cleaner.
• the feed device 4 has a feed trough 5 and a feed roller 6.
• a part of the Vorreisserwalze 7 is still shown.
• the feed trough 5 has a main body 13, which is partially protected by an apron 14 from wear.
• An elastic lip 15 is arranged so that fibers between it and the feed roller 6 can be clamped.
• a support bar 16 is arranged on the side facing away from the feed roller 6 of the elastic lip 15.
• the elastic lip 15 are at least as far elastically deformed until it touches the support bar 16.
• the support strip 16 is a further deformation of the elastic lip 15, for example by a hard foreign body in the fiber material excluded.
• the elastic lip 15 is thus not deformed in particular in an area in which a permanent deformation occurs. A return of the elastic lip 15 in its original shape and position is thus always guaranteed.
• a spacer bar 17 is disposed between the base body 13 of the feed trough 5 and the elastic lip 15.
• This spacer strip 17 is designed as an adjustable linkage 18, so that the distance between the base body 13 and the elastic lip 15 is easily adjustable. With a different distance between the base body 13 and elastic lip 15, the feed trough 5 can be optimized for different fiber lengths.
• a slightly deformable seal 19 is arranged in the feed trough 5 of Figure 3 between the elastic lip 15 and the support bar 16. This seal 19 closes the intermediate space 20 located between the elastic lip 15 and the support strip 16 and thus protects it against contamination, in particular against fiber fly.
• the spacer bar 17 is not adjustable, but it is designed to be interchangeable, so that a different distance between the main body 13 and the elastic lip 15 can be achieved with different spacers 17. This distance is adapted to the respective fiber length and for very long fibers, the spacer bar 17 can even be omitted altogether.
• the feed device 4 of FIG. 4 is designed in such a way that a hard foreign body located in the fiber material can be detected via a contact between the elastic lip 15 and a contact surface 21 of the support strip 16.
• an electrical insulation 22 isolates the elastic lip 15 from the support strip 16.
• the elastic lip 15 is connected to the support strip 16 via a voltage source 23 and a current measuring device 24.
• the circuit Since the elastic lip 15 is electrically insulated from the support strip 16, the circuit is normally open and the current measuring device 24 measures no current. If, however, the elastic lip 15, for example, by a hard foreign body, so far deformed that it touches the contact surface 21 of the support bar 16, then the circuit is closed and there is current that measures the current measuring device 24.
• the seal 19 is designed so flexible that it can be overpressed and does not affect the contact. In order to indicate the contact of the elastic lip 15 with the contact surface 21, and thus the detection of the foreign body, the current measuring device 24 is connected to an audible and / or visual alarm 25, which indicates to the operating personnel the foreign body.
• the current measuring device 24 is also connected to a control device 26 which stops the feed roller 6 in the detection of a foreign body, so that the foreign body does not penetrate further and causes no major damage. It is particularly advantageous if the control device 26, after it has been stopped, turns the feed roller 6 backwards so far that the foreign body comes out below the elastic lip 15 and can be easily removed by the operating personnel.
• the contact between the elastic lip 15 and the contact surface 21 is detected by a piezoelectric element 27.
• the piezoelectric element 27 is arranged in this case on the contact surface 21 of the support bar 16, but it may also be arranged on the elastic lip 15.
• pressure is applied to the piezoelectric element 27, resulting in an electric voltage between two electrodes of the piezoelectric element 27. This electrical voltage is measured and thus the contact detected.
• the feed trough 5 is shown without spacer bar, which is optimal for particularly long fiber lengths.
• FIG. 6 shows a schematic front view of a feed trough 5.
• the elastic lip 15 is divided into four segments 15.1, 15.2, 15.3 and 15.4. Of course, a different number of segments is possible.
• the individual segments are shorter than a single elastic lip 15 and can be better adjusted over their width.
• the individual segments of the elastic lip 15 are also electrically isolated from each other. For this purpose, in the region in which they adjoin one another, an insulating layer 28 is attached, of which only one has been provided with a reference numeral for the sake of clarity.
• the individual segments are connected via a respective current measuring device with the voltage source. Thus, in the case of a foreign body in the fiber mat, it can be recognized in which segment this foreign body is located.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Preliminary Treatment Of Fibers (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=61952751

Family Applications (1)

Country Status (4)

Families Citing this family (1)

Family Cites Families (12)

• 2017
  • 2017-04-13 CH CH00505/17A patent/CH713690A1/de not_active Application Discontinuation
• 2018
  • 2018-03-27 CN CN201880024231.2A patent/CN110462120B/zh active Active
  • 2018-03-27 EP EP18717128.5A patent/EP3610059A1/de active Pending
  • 2018-03-27 WO PCT/IB2018/052081 patent/WO2018189607A1/de unknown

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