Classifications

• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
  • D04H18/00—Needling machines
  • D04H18/04—Needling machines with water jets
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
  • B05B1/14—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
  • B05B15/60—Arrangements for mounting, supporting or holding spraying apparatus
  • B05B15/65—Mounting arrangements for fluid connection of the spraying apparatus or its outlets to flow conduits
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S239/00—Fluid sprinkling, spraying, and diffusing
  • Y10S239/19—Nozzle materials

Definitions

• the invention relates to a nozzle strip for producing the finest liquid jets for the interlacing of endless or finite fibers in webs of chemical or natural fibers in nonwovens, tissues, fabrics or knitted fabrics, which preferably extend in a length that is transverse to the leading web Nozzle bar corresponding to the width of the material web is stored in a liquid-tight manner, a liquid pressure of up to 1000 bar being generated in the nozzle bar, which presses the nozzle strip against a wall of the nozzle bar provided with a flow slot, wherein a plurality of at a distance in the nozzle strip to generate the liquid jets of 20 - 128 hpi, i.e.
• the material for the nozzle strip or the individual nozzle bodies in the nozzle strip is a hard metal or a ceramic material, as well Sat. phir, or a material is selected that has the same or similar physical properties, and the nozzle strip or the individual nozzle body is supported over its surface area by another material such as stainless steel.
• a nozzle strip is e.g. B. is known from EP-A-0 725 175. It extends over a large working width and is generally made of a thin sheet of stainless steel with z. B. mechanically produced holes.
• This nozzle strip or the holes made in it have a geometry which has been tried and tested in practice and which has always been improved, but which has only a short service life in practice.
• the wall of the individual nozzle holes up to 0.1 mm in diameter must be extremely smooth, which is why the holes are drilled or punched.
• the geometry of the holes is of particular importance for the formation of the water jet, which because a diffuse, conical part adjoins the height of the nozzle hole generally behind a nozzle cross-section determining the water jet, also in order not to tear the water jet formed on the way to the end of the hole by friction on the walls of the hole.
• the holes quickly become unclean in the edge areas due to the water pressure that is increasingly desired in practice and also because of the constant abrasion. This creates blurred, out-of-round water jets, which only bring unsatisfactory energy into the dynamic treatment of the web.
• nozzle strip is now described according to the genus, with which the aforementioned problems are avoided.
• the water jets are now each generated by a single nozzle body, which is made of an extremely hard material and is only supported on the nozzle strip.
• Such nozzle body can, for. B. be formed from a sapphire, on which the nozzle hole that can be produced with an extremely smooth wall shows no signs of wear even after prolonged use with high water pressure. Only the assembly of the individual nozzle bodies on such a nozzle strip is not easy. There is in particular the risk that the nozzle bodies are not aligned exactly perpendicular to the extension of the nozzle strip and that they may become deformed when the long nozzle strip is subjected to bending stress. B. solve this by stronger contact.
• the object of the invention is to find a holder of the individual nozzle body, which ensures a secure alignment of the nozzle body in and on the nozzle strip and at the same time ensures that even if the nozzle strip is subjected to bending stress, it is impossible for individual nozzle bodies to jump off is.
• z. B a cylindrical wall in which the nozzle body is held by on the radial inner wall and in the axial direction on a constriction of the inner wall.
• the constriction can be a reduction in the diameter of a bore for receiving the nozzle body.
• the nozzle body carrier can consequently consist of a cylindrical tube, the outer diameter of which is made wider in the region of the nozzle body, a tube with a reduced diameter connecting to the head-like carrier region of the nozzle body, which extends in the assembled state in the nozzle strips, similar to an Allen screw.
• a nozzle strip with the carried nozzle bodies of the type according to the invention is shown as an example in the drawing. Show it:
• FIG. 2 shows a section through a nozzle strip with individual nozzle bodies which are held in the nozzle strip in a separate nozzle body carrier made of a different material
• FIG. 3 shows the top view of the nozzle strip according to FIG. 2
• FIG. 4 shows a section across the strip according to FIG. 3,
• FIG. 5 shows the top view of the nozzle strip according to FIG. 2, but with nozzle body supports and inserted on top of the nozzle strip without a depression
• FIG. 6 shows a section across the strip according to FIG. 5.
• the housing of the nozzle bar consists of an upper part 1, which is screwed to the lower part 2 many times over the length by the screws 3 from below.
• the upper part 1 has two bores 4 and 5, of which the upper is the pressure chamber 4 and the lower the pressure distribution chamber 5. Both chambers are open on one end and screwed tightly again through the cover.
• the two chambers 4 and 5 are separated from one another by an intermediate wall.
• a large number of flow bores 9 in the intermediate wall connect the two chambers along the length of the nozzle bar, so that the liquid flowing into the pressure chamber 4 flows evenly over the length into the pressure distribution chamber 5, in which an impact body 20 is additionally held on brackets 21 ,
• the pressure distribution chamber is open at the bottom, namely through the slot 10 which is narrow in relation to the diameter of the bore of the pressure distribution chamber 5 and which also extends over the length of the beam.
• the upper part 1 is screwed to the lower part 2 firmly and in a liquid-tight manner. The tightness is brought about by the O-ring 11, which lies in an annular groove in the upper part 1.
• the slot 10 encloses a spring projection 23, which is fitted into a corresponding groove 24 in the lower part 2 and has a repair groove 26 for the O-ring 12, the outer edges 25 of which rest against the edge of the nozzle strip 14 are directed.
• an annular groove is again introduced, in which the O-ring 12 lies for sealing the nozzle strip 14.
• a slot 13 is also introduced in the lower part 2, which is only very narrow in its upper region and leaves only a little more than the width of the effective nozzle openings of the nozzle strip 14 open.
• Fig. 1 is only relevant in connection with the storage of the nozzle strip.
• the nozzle bar can also look very different, such as. B. according to DE-A-199 21 694.
• the nozzle strip 14 has a certain width, which is necessary for receiving the nozzle holes 30 and for storage above the O-ring 12.
• the individual nozzle bodies 31 are fastened on or better according to the invention in this nozzle strip 14. 2
• the nozzle body consists of the sapphire 31 with the central bore or the nozzle hole 30, which widens after a short distance in depth to a cone that is very wide, possibly with an angle of 45 °.
• the reason for this wide opening lies in the exact formation of the jet in the actual nozzle 30, which is very smooth in the walls and sharp-edged in the edge boundaries, and the subsequent non-contact extension of the jet until it strikes the one to be changed Textile goods, such as tissue or paper. This ensures a high-energy jet.
• Such a sapphire 31 is held in a form-fitting manner in a nozzle body carrier 36.
• the nozzle body carrier 31 is designed similarly to an Allen screw, that is to say with a head part 37, which receives the sapphire 31 centrally, and a foot part 38, through which a further central bore 39 extends.
• the head part 37 is wider than the foot part 38 in diameter and is supported with its ring-shaped Contact surface 40 on the nozzle strip 14. Bores 41 are made in the nozzle strip 14 for the form-fitting reception of the nozzle body support 36 or for its foot part 38. With this construction, the sapphire 31 is precisely aligned and permanently held in the nozzle strip 14.
• a groove 42 is milled into the nozzle strip 14, the dimensions of which are provided only for receiving the nozzle bodies 31, 36.
• the depth of the groove 42 then corresponds to the height of the head part 37 of the nozzle body support 36, for which reference is made to FIG. 4.
• the groove 42 can also be omitted, for which purpose reference is made to FIGS. 5 and 6.
• the bores 41 in the nozzle strip 14 for the foot part 38 of the nozzle body carrier 36 are preferably in two rows and, as shown in FIG. 3, offset from one another and at a distance 43 which ensures that the head parts 37 of the nozzle body carrier 36 do not touch, and also not if the nozzle strip 14 should be bent in one direction or the other. This ensures an exact constant arrangement of the sapphires 31 in the nozzle strip 14 according to the assembly.

Landscapes

• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Nonwoven Fabrics (AREA)
• Nozzles (AREA)
• Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
• Treatment Of Fiber Materials (AREA)
• Sampling And Sample Adjustment (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=7657308

Family Applications (1)

Country Status (8)

Families Citing this family (6)

Family Cites Families (18)

• 2000
  • 2000-09-21 DE DE10047106A patent/DE10047106A1/de not_active Withdrawn
• 2001
  • 2001-09-18 DE DE50106809T patent/DE50106809D1/de not_active Expired - Fee Related
  • 2001-09-18 US US10/381,030 patent/US6942167B2/en not_active Expired - Fee Related
  • 2001-09-18 JP JP2002529585A patent/JP2004510070A/ja active Pending
  • 2001-09-18 DK DK01982307T patent/DK1319099T3/da active
  • 2001-09-18 WO PCT/EP2001/010753 patent/WO2002024998A2/fr not_active Ceased
  • 2001-09-18 AU AU2002213930A patent/AU2002213930A1/en not_active Abandoned
  • 2001-09-18 AT AT01982307T patent/ATE299960T1/de not_active IP Right Cessation
  • 2001-09-18 EP EP01982307A patent/EP1319099B1/fr not_active Expired - Lifetime

Non-Patent Citations (1)

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