EP0838009A1 - Process and apparatus for the preparation of a tubular sheathing of mineral fibres for insulation purposes - Google Patents

Process and apparatus for the preparation of a tubular sheathing of mineral fibres for insulation purposes

Info

Publication number
EP0838009A1
EP0838009A1 EP96920746A EP96920746A EP0838009A1 EP 0838009 A1 EP0838009 A1 EP 0838009A1 EP 96920746 A EP96920746 A EP 96920746A EP 96920746 A EP96920746 A EP 96920746A EP 0838009 A1 EP0838009 A1 EP 0838009A1
Authority
EP
European Patent Office
Prior art keywords
fibres
roll
mineral
fibre web
zone
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Withdrawn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
EP96920746A
Other languages
German (de)
English (en)
French (fr)
Inventor
Ian Cridland
Jens Husbjerg
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.)
Rockwool AS
Original Assignee
Rockwool International AS
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 Rockwool International AS filed Critical Rockwool International AS
Publication of EP0838009A1 publication Critical patent/EP0838009A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials

Definitions

  • the present invention relates to a process for the preparation of a tubular sheathing of mineral fibres, such as glass, rock and slag fibres, for insulation purposes wherein a mineral fibre web is wound up so as to form a roll having an axially extending hole, the roll being slitted along a generatrix so as to provide an openable tubular sheathing.
  • mineral fibres such as glass, rock and slag fibres
  • tubular sheathings prepared by such known process are rather rigid and may consequently not readily be used for insulating bent pipe sections. Consequently, it is known to cut off parts of the tubular sheathings in order thereby to make it possible to bend the tubular sheathings sufficiently for them to be fitted on pipe bends.
  • this object is achieved by a process of the kind stated in the preamble, which is characterized in that the mineral fibre web, prior to the winding up as a roll, is treated in at least one longitudinally extending zone in such a way that the bond between the fibres in this zone is weakened.
  • the weakening mentioned of the bond between the fibres is obtainable in various ways.
  • a compression of the fibres may be performed in the longitudinally extending zone or zones. This may e.g. be achieved by exerting, during the advancing of the mineral fibre web, a linear pressure thereon in the said zone.
  • a number of parallel, separated, weakening zones are established, e.g. by use of an embossing roller constituted by a number of axially separated discs.
  • weakening is obtainable by removal of material by milling or cutting off.
  • the weakening of the bond is obtainable by heating the binder to decomposition temperature, e.g. by means of gas burners or hot rods.
  • the process according to the invention is particularly well-suited for use in the preparation of tubular sheathings from mineral fibre webs having a density of 40-150 kg/m * * for mineral fibre webs of rock fibres, and of 40-100 kg/m ** for webs of glass fibres.
  • the mineral fibre web may be prepared from rock fibres, glass fibres, slag fibres or other synthetic, inorganic fibres.
  • the invention further relates to an apparatus for the preparation of tubular sheathings of mineral fibres for insulation purposes, which apparatus comprises means for winding up a mineral fibre web so as to form a roll having an axially extending hole, and means for slitting the roll so as to provide an openable tubular sheathing, the apparatus being characterized by further comprising means for weakening the bond between the fibres in the mineral fibre web in one or more longitudinally extending zones.
  • the said means e.g. consist of pressure wheels which are capable of crushing the fibres in the zones mentioned, or of gas burners or hot rods.
  • FIG. 1 schematically shows an apparatus for carrying out the process according to the invention
  • Fig. 2 shows a perspective view of the embossing and winding means in the apparatus according to Fig. 1, and
  • Fig. 3 shows a longitudinal section of a pipe bend insulated with a tubular sheathing prepared by a process according to the invention.
  • the apparatus shown in Fig. 1 comprises an endless conveyor belt which is supported by two or more rolls, only one of which, 2, is shown.
  • a mineral fibre web 3 is advanced by the endless conveyor belt 1 which passes the web 3 through a roller pair comprising a lower supporting roller 4 and an upper embossing roller 5.
  • the embossing roller 5 comprises a number of mutually separated discs 6 mounted on a common shaft 7.
  • a number of parallel line-shaped embossed zones 8, corresponding to the number of discs 6 on the embossing roller 5, are formed in the web 1.
  • the embossing of the mineral fibre web 3 results in a significant weakening of the web in the zones 8 mentioned in that the fibres are partly crushed during the embossing.
  • the embossed mineral fibre web 3 is introduced between two rollers 10 and 11, which together with five other rollers 12, 13, 14, 15 and 16, one of which, e.g. 15, is connected with driving means not shown, support an endless elastic belt 17 which by ⁇ passes a pipe 18 being connected with driving means not shown and serving for winding up the mineral fibre web 3 as a roll.
  • the winding up is stopped, and the roll obtained is removed from the pipe 18, which is then ready for winding up a new roll.
  • the roll 19 removed from the pipe 18 will upon slitting along a generatrix provide an openable tubular sheathing.
  • the weakened part of the tubular sheathing will be rather easily bendable, and is consequently well-suited for insulating a pipe bend 20 as illustrated in Fig.3.
  • a tubular sheathing 21 prepared as described above is here fitted on a bent pipe 21.
  • tubular sheathing will be easily conformable to the shape of the pipe bend 20.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Insulation (AREA)
  • Nonwoven Fabrics (AREA)
  • Paper (AREA)
  • Reinforced Plastic Materials (AREA)
EP96920746A 1995-06-22 1996-06-24 Process and apparatus for the preparation of a tubular sheathing of mineral fibres for insulation purposes Withdrawn EP0838009A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DK71695 1995-06-22
DK071695A DK171905B1 (da) 1995-06-22 1995-06-22 Fremgangsmåde og apparat til fremstilling af en rørskål af mineralfibre til isoleringsformål
PCT/DK1996/000277 WO1997001060A1 (en) 1995-06-22 1996-06-24 Process and apparatus for the preparation of a tubular sheathing of mineral fibres for insulation purposes

Publications (1)

Publication Number Publication Date
EP0838009A1 true EP0838009A1 (en) 1998-04-29

Family

ID=8096724

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96920746A Withdrawn EP0838009A1 (en) 1995-06-22 1996-06-24 Process and apparatus for the preparation of a tubular sheathing of mineral fibres for insulation purposes

Country Status (10)

Country Link
EP (1) EP0838009A1 (cs)
AU (1) AU6188696A (cs)
BG (1) BG102114A (cs)
CA (1) CA2222778A1 (cs)
CZ (1) CZ409097A3 (cs)
DK (1) DK171905B1 (cs)
HU (1) HUP9802285A3 (cs)
PL (1) PL324317A1 (cs)
SK (1) SK174997A3 (cs)
WO (1) WO1997001060A1 (cs)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2317403B (en) * 1996-09-20 2001-01-24 Rockwool Int A process for the preparation of a layered insulating board,and a layered insulating board
GB9717484D0 (en) 1997-08-18 1997-10-22 Rockwool Int Roof and wall cladding
US6743326B2 (en) * 2002-03-14 2004-06-01 Johns Manville International, Inc. Single tear pre-cut insulation blanket
CN101614313B (zh) * 2009-07-30 2010-12-29 长春高祥特种管道有限公司 用于高强度连续复合管的外保温层包覆设备

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE719108C (de) * 1933-04-13 1942-03-30 Loewe Radio Ag Transformatorloser Universalempfaenger
SE206757C1 (cs) * 1961-01-30 1966-08-09
FR2041278A5 (cs) * 1969-04-18 1971-01-29 Syntexill
DE2003380A1 (de) * 1970-01-26 1971-07-29 Otto Krebes Bogen- bzw. Kruemmerband und Vorrichtung zu seiner Herstellung
DK157627C (da) * 1987-11-06 1993-02-08 Rockwool Int Element til isolering af isaer krumme roer
SE500510C2 (sv) * 1992-11-09 1994-07-11 Rockwool Ab Mineralullsprodukt för isolering av rörböjar och sätt att isolera rörböjar med en sådan produkt

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9701060A1 *

Also Published As

Publication number Publication date
HUP9802285A2 (hu) 1999-01-28
AU6188696A (en) 1997-01-22
WO1997001060A1 (en) 1997-01-09
CA2222778A1 (en) 1997-01-09
SK174997A3 (en) 1998-07-08
CZ409097A3 (cs) 1998-07-15
DK71695A (da) 1996-12-23
HUP9802285A3 (en) 1999-03-01
DK171905B1 (da) 1997-08-04
PL324317A1 (en) 1998-05-25
BG102114A (en) 1999-01-29

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