EP0190732A1 - Spiralgliederband mit verminderter Luftdurchlässigkeit - Google Patents

Spiralgliederband mit verminderter Luftdurchlässigkeit Download PDF

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Publication number
EP0190732A1
EP0190732A1 EP86101443A EP86101443A EP0190732A1 EP 0190732 A1 EP0190732 A1 EP 0190732A1 EP 86101443 A EP86101443 A EP 86101443A EP 86101443 A EP86101443 A EP 86101443A EP 0190732 A1 EP0190732 A1 EP 0190732A1
Authority
EP
European Patent Office
Prior art keywords
spirals
plug
wires
turns
wire
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.)
Withdrawn
Application number
EP86101443A
Other languages
German (de)
English (en)
French (fr)
Inventor
Johannes Lefferts
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.)
Siteg Siebtechnik GmbH
Original Assignee
Siteg Siebtechnik GmbH
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 Siteg Siebtechnik GmbH filed Critical Siteg Siebtechnik GmbH
Publication of EP0190732A1 publication Critical patent/EP0190732A1/de
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/0027—Screen-cloths
    • D21F1/0072—Link belts

Definitions

  • the invention relates to a covering for the dryer section of a paper machine in the form of a spiral link belt made from a large number of plastic spirals.
  • the turns of adjacent spirals are zipped together.
  • a plug wire is inserted through the channel formed thereby, which secures the spirals.
  • the turns of the spirals penetrate the material of the plug wires.
  • the spiral link belt With such paper machine dryer fabrics, it is often important that the spiral link belt have a low air permeability. With the dimensions of the spirals and the plug wires, as they are used in spiral link belts for paper machine dryer fabrics, there is an air permeability of approximately 600 cfm. By inserting filler material into the free interior of the spirals, the air permeability can be reduced to approximately 180 cfm. However, an even lower air permeability of e.g. 80 cfm.
  • the invention has for its object to provide a spiral link belt that has low air permeability.
  • this object is achieved in that the depth of penetration of the turns into the material of the plug wires is approximately equal to the wire thickness of the spirals.
  • the difference in the two perpendicular cross-sectional dimensions of the plug wires is preferably about twice the wire thickness of the plastic monofilament from which the spirals are wound.
  • the cross section of the plug wires is preferably composed of a round middle part and thin tongues extending in the opposite direction.
  • the high depth of penetration of the turns of the spirals in the material of the plug wires can also be achieved in that the plug wires are bicomponent monofilaments with a hard core and a jacket or tongues made of soft plastic.
  • the profile of the plug wires described above enables particularly low air permeability to be achieved.
  • the spiral link belts are heat-set under high longitudinal tension after joining the spirals and inserting the plug wires.
  • the turns of the spirals penetrate somewhat into the material of the plug wires, so that they are deformed in a wave shape or similar to a crankshaft.
  • This waveform creates a positive engagement between the plug wires and the spirals and in particular prevents the turns of the spirals from shifting along the plug wires.
  • the waveform of the plug wires is therefore necessary for the transverse stability of the spiral link belt.
  • the plug wires must be made of a very hard plastic so that they can withstand the high shear forces exerted by the spirals during heat setting.
  • the turns of the spirals penetrate into the material of the plug wires in the known spiral link belts only about a quarter of the wire thickness of the spirals.
  • the penetration depth is, for example, a maximum of 0.2 mm. In the known spiral link belts, this is fully sufficient, since this deformation of the plug wires is only intended to prevent the spirals from moving along the plug wires and thereby the stability of the spiral links secure bandes.
  • the basic idea of the invention consists in the penetration depth due to the special cross-sectional shape of the plug wires or the use of bicomponent monofilaments with a core made of hard plastic and peripheral areas made of softer plastic than plug wires. about to enlarge the wire size of the spirals.
  • the wire thickness of the spirals is understood to mean the diameter of the monofilament from which the spirals are wound.
  • the depth of penetration can also be controlled by the hardness of the material of the plug wires. This creates a cavity of uniform width in the spirals, which can be inserted by inserting smooth filling material, e.g. one or more plastic monofilaments can be largely filled in without leaving free trapezoidal surfaces between the filling material and two successive turns of the same spiral, which increase the air permeability.
  • Figures 1 and 2 show several turns of some spirals of a spiral link belt.
  • the overlapping spirals 1 form a channel, in each of which a plug wire 2 is inserted.
  • the spirals 1 are secured by the plug wires 2 so that they can no longer be separated.
  • the spirals as is common, have an oval shape with straight legs connected by round winding arcs.
  • the plug wires 2 are profiled and have tongues 3 directed in opposite directions, the cross-sectional dimension in the longitudinal direction of the spiral link belt being approximately twice the diameter of the monofilament from which the spirals 1 are wound, larger than the cross-sectional dimension perpendicular to the plane of the spiral link belt.
  • the longitudinal direction of the screen is indicated in FIG. 1 by the double arrow.
  • One of the plug wires 2 is shown by a broken line, insofar as it is covered by the spirals 1. As usual, neighboring spirals have opposite turns. Through the tongues 3 of the plug wires 2, the trapezoidal surfaces 5 are covered in plan view, which would remain open in the case of a plug wire with a round cross section in the central plane of the spiral link belt.
  • FIG. 3 shows a plug wire 2 detached from the spiral link band.
  • the turns of the spirals have buried or cut into the material of the plug wire 2 due to the heat setting under longitudinal tension.
  • the tongues 3 remain between the turns.
  • the length of the tongues 3 of the profile of the plug wire 2 and the temperature and longitudinal tension during heat setting are preferably matched to one another such that the depth of penetration of the turns of the spirals 1 into the material of the plug wire 2 corresponds to the diameter of the plastic monofilament from which the spirals 1 are wound .
  • the tips of the turns of the spirals 1 are then in line with the outermost points of the transverse dimension of the plug wires 2.
  • the interior 6 of the spirals is laterally limited by the tips of the winding arcs of the spirals 1 and the tongues 3 of the plug-in wire 2 which remain between them so that it always has the same width.
  • the interiors 6 of the spirals 1 can therefore be filled with filling material 4 subsequently almost completely. Due to this complete filling of the interior spaces 6, the spiral link belt then has a very low air permeability.
  • Another way to increase the depth of penetration is to use a plug-in wire, the material of which has an inhomogeneous hardness, in such a way that the material hardness of the plug-in wire gradually or gradually decreases outwards from the center.
  • a bicomponent monofilament can be used as the plug wire, as described in. Fig. 4 is shown.
  • Such a plug-in wire 2 consists of a core 7 with the usual hardness of plug-in wires for spiral link belts, while the sheath 8 or the edge areas consist of a softer plastic.
  • the jacket 8 or the tongues 3 from one Form plastic that has a lower melting or softening temperature than the plastic of the core 7.
  • the core 7 can also have a round cross section and the sheath 8 can have a uniform thickness.
  • the depth of penetration by the profiling i.e. the narrow tongues 3 already increased.
  • the depth of penetration can also be increased by the tongues 3 being made of a softer material.
  • FIG. 6 shows a profile of a plug wire 2 similar to that of FIG. 5, the plug wire 2, however, having flat boundary surfaces 9 at the top and bottom. These boundary surfaces 9 are advantageous because they ensure that the plug wire 2 is in the correct position before and during heat setting, i.e. that the tongues 3 lie in a horizontal plane. The winding legs of the spirals 1 press against the boundary surfaces 9 and in this way secure the position of the plug wire 2.
  • the profile of the plug wires 2 can also be such that each pair of tongues are aligned in opposite directions, so that each plug wire 2 has a total of four tongues 3.
  • Fig. 7 shows an embodiment in which the plug-in wire is composed of a central part 10 and two wires 12 as side parts.
  • the middle part 10 consists of a plastic, as is conventionally used as a plug wire material, for example polyester.
  • the wires 12 lie in the side recesses 11 of the middle part 10 and consist of a low-melting Plastic.
  • the wires 12 are inserted together with the central part 10 into the channels which are formed by the interlocking turns of two spirals 1 in each case. Due to the limited space within these channels, the wires 12 cannot fall out of the cutouts 11.
  • the winding arcs of the spirals 1 cut into the wires 12. It is advantageous that the winding arcs, the wires 12 made of soft or low-melting material cannot completely cut through, since the winding arcs are prevented by the hard material of the middle part 10 from penetrating the part of the wires 12 lying in the recesses 11. 8, the limit up to which the winding arcs can cut through the wires 12 is shown in dashed lines. It is particularly advantageous to use a polypropylene-coated multifilament for the wires 12, the multifile consisting of polyester.
  • the winding arcs can penetrate very far into the material of the plug-in wires, which are formed here from the middle part 10 and the lateral wires 12, since the propylene-coated multifile (wires 12) are very adaptable in cross section without that the cohesion of the wires 12 in the longitudinal direction is jeopardized.

Landscapes

  • Suspension Of Electric Lines Or Cables (AREA)
  • Ropes Or Cables (AREA)
  • Paper (AREA)
  • Braiding, Manufacturing Of Bobbin-Net Or Lace, And Manufacturing Of Nets By Knotting (AREA)
EP86101443A 1985-02-08 1986-02-04 Spiralgliederband mit verminderter Luftdurchlässigkeit Withdrawn EP0190732A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3504373 1985-02-08
DE3504373 1985-02-08

Publications (1)

Publication Number Publication Date
EP0190732A1 true EP0190732A1 (de) 1986-08-13

Family

ID=6262044

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86101443A Withdrawn EP0190732A1 (de) 1985-02-08 1986-02-04 Spiralgliederband mit verminderter Luftdurchlässigkeit

Country Status (7)

Country Link
EP (1) EP0190732A1 (no)
JP (1) JPS61186596A (no)
AU (1) AU5287386A (no)
BR (1) BR8600543A (no)
FI (1) FI860481A (no)
NO (1) NO855121L (no)
ZA (1) ZA86841B (no)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2216914A (en) * 1988-03-12 1989-10-18 Scapa Group Plc Link fabrics
DE9209146U1 (no) * 1992-07-08 1992-09-10 Wuerttembergische Filztuchfabrik D. Geschmay Gmbh, 7320 Goeppingen, De
WO1996017125A1 (en) * 1994-11-28 1996-06-06 Asten, Inc. Papermaker's fabric containing fibers with fins having a reduced cross-sectional area within the fin
WO2006065454A1 (en) * 2004-12-15 2006-06-22 Albany International Corp. Improved spiral fabrics
US7691238B2 (en) 2004-12-15 2010-04-06 Albany International Corp. Spiral fabrics
CN102704186A (zh) * 2011-11-03 2012-10-03 新乡市金利达化纤有限公司 滚球场用的纤维针刺毯的基布

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3018253B1 (de) 2014-11-04 2016-09-21 Karl Mayer Textilmaschinenfabrik GmbH Vorrichtung und Verfahren zum Herstellen von Wendelsieben

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2083431A (en) * 1980-09-06 1982-03-24 Scapa Porritt Ltd Link belts
DE3039873A1 (de) * 1980-10-22 1982-08-19 Siteg Siebtechnik GmbH, 4422 Ahaus Siebband aus gefuellten kunststoffwendeln und verfahren zu dessen herstellung
DE3301041A1 (de) * 1983-01-14 1984-07-19 J.J. Marx Gmbh, 6734 Lambrecht Spiralsieb fuer papiermaschinen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2083431A (en) * 1980-09-06 1982-03-24 Scapa Porritt Ltd Link belts
DE3039873A1 (de) * 1980-10-22 1982-08-19 Siteg Siebtechnik GmbH, 4422 Ahaus Siebband aus gefuellten kunststoffwendeln und verfahren zu dessen herstellung
DE3301041A1 (de) * 1983-01-14 1984-07-19 J.J. Marx Gmbh, 6734 Lambrecht Spiralsieb fuer papiermaschinen

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2216914A (en) * 1988-03-12 1989-10-18 Scapa Group Plc Link fabrics
DE9209146U1 (no) * 1992-07-08 1992-09-10 Wuerttembergische Filztuchfabrik D. Geschmay Gmbh, 7320 Goeppingen, De
WO1996017125A1 (en) * 1994-11-28 1996-06-06 Asten, Inc. Papermaker's fabric containing fibers with fins having a reduced cross-sectional area within the fin
WO2006065454A1 (en) * 2004-12-15 2006-06-22 Albany International Corp. Improved spiral fabrics
US7575659B2 (en) 2004-12-15 2009-08-18 Albany International Corp. Spiral fabrics
US7691238B2 (en) 2004-12-15 2010-04-06 Albany International Corp. Spiral fabrics
CN102704186A (zh) * 2011-11-03 2012-10-03 新乡市金利达化纤有限公司 滚球场用的纤维针刺毯的基布

Also Published As

Publication number Publication date
JPS61186596A (ja) 1986-08-20
FI860481A0 (fi) 1986-02-03
AU5287386A (en) 1986-08-14
ZA86841B (en) 1986-10-29
FI860481A (fi) 1986-08-09
NO855121L (no) 1986-08-11
BR8600543A (pt) 1986-10-21

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