SE441732B - SET FOR MANUFACTURING A PIPE OF INSULATING MATERIALS INCLUDING ONE OR MORE INTERNAL PIPES, A PLASTIC FOAM INSULATION AND PLASTIC LAYER - Google Patents

SET FOR MANUFACTURING A PIPE OF INSULATING MATERIALS INCLUDING ONE OR MORE INTERNAL PIPES, A PLASTIC FOAM INSULATION AND PLASTIC LAYER

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Publication number
SE441732B
SE441732B SE8405008A SE8405008A SE441732B SE 441732 B SE441732 B SE 441732B SE 8405008 A SE8405008 A SE 8405008A SE 8405008 A SE8405008 A SE 8405008A SE 441732 B SE441732 B SE 441732B
Authority
SE
Sweden
Prior art keywords
plastic
surface layer
foam
pipe
calibration
Prior art date
Application number
SE8405008A
Other languages
Swedish (sv)
Other versions
SE8405008L (en
SE8405008D0 (en
Inventor
J Brenner
H Lindstrom
Original Assignee
Neste Oy
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 Neste Oy filed Critical Neste Oy
Publication of SE8405008L publication Critical patent/SE8405008L/en
Publication of SE8405008D0 publication Critical patent/SE8405008D0/en
Publication of SE441732B publication Critical patent/SE441732B/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/20—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of indefinite length
    • B29C44/22—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of indefinite length consisting of at least two parts of chemically or physically different materials, e.g. having different densities
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/20—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of indefinite length
    • B29C44/32—Incorporating or moulding on preformed parts, e.g. linings, inserts or reinforcements
    • B29C44/322—Incorporating or moulding on preformed parts, e.g. linings, inserts or reinforcements the preformed parts being elongated inserts, e.g. cables
    • B29C44/324—Incorporating or moulding on preformed parts, e.g. linings, inserts or reinforcements the preformed parts being elongated inserts, e.g. cables the preformed parts being tubular or folded to a tubular shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B29C48/151—Coating hollow articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
    • B29C48/901—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
    • B29C48/908—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article characterised by calibrator surface, e.g. structure or holes for lubrication, cooling or venting

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Thermal Insulation (AREA)
  • Molding Of Porous Articles (AREA)
  • Laminated Bodies (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Resistance Heating (AREA)

Description

8405008-7 10 15 20 25 30 35 2 Inom tekniken är det även känt ett medel, medelst vilket ett plastöverdraget rör av isolerande material kan framställas i ett kontinuerligt strängsprutnings- förfarande. Förutom ytskiktet kan innerröret också framställas genom strängsprutning, och plastskummet sprutas in mellan inner- och ytskíkten i samband med strängsprutningsförfarandet. 8405008-7 10 15 20 25 30 35 2 A means is also known in the art, by means of which a plastic-coated pipe of insulating material can be produced in a continuous extrusion process. In addition to the surface layer, the inner tube can also be produced by extrusion, and the plastic foam is injected between the inner and surface layers in connection with the extrusion process.

I det finska patentet 54878 beskrivs ett organ, med vilket innerröret kan beläggas med ett skumskikt och ett plastytskíkt i ett steg med hjälp av en sträng- sprutningspress. Organets skumningsmunstycke är anordnat att följa efter ytskiktsmunstycket på ett sådant sätt att plastskumisoleringen kan insprutas i det utrymme som definieras av ytskiktet och innerröret mellan munstyckshuvudet och kalibreringsorganen. Kalibrerings- organen, som i huvudsak utgöres av ett vakuumkalibre- ringsorgan, har anordnats på avstånd från ytskiktsmun- stycket, så att ytskiktet kan nedkylas till en lämp- lig kalibreringstemperatur.Finnish patent 54878 describes a means by which the inner tube can be coated with a foam layer and a plastic surface layer in one step by means of an extrusion press. The foaming nozzle of the member is arranged to follow the surface layer nozzle in such a way that the plastic foam insulation can be injected into the space defined by the surface layer and the inner tube between the nozzle head and the calibration means. The calibration means, which mainly consist of a vacuum calibration means, have been arranged at a distance from the surface layer nozzle, so that the surface layer can be cooled down to a suitable calibration temperature.

Nackdelarna med anordningen enligt det finska patentet 54878 inbegriper placeringen av skumningsmun- stycket så sent som efter ytskiktsmunstycket i rörets årörelseriktning, varigenom ett tomrum bildas bakom skumningsmunstycket. Om luften i tomrummet inneslutes i skummet alstras ett vakuum i ytskiktet omedelbart efter munstycket. Detta gör att det mjuka ytskiktet dras mot skumningsmunstycket och produktionen stoppas.The disadvantages of the device according to Finnish patent 54878 include the placement of the foaming nozzle as late as after the surface nozzle in the direction of movement of the pipe, whereby a void is formed behind the foaming nozzle. If the air in the void is trapped in the foam, a vacuum is generated in the surface layer immediately after the nozzle. This causes the soft surface layer to be pulled towards the foaming nozzle and production is stopped.

Tomrummet kan också fyllas med härdat skum, som har en skadlig inverkan på ytskiktets kvalitet.The void can also be filled with hardened foam, which has a detrimental effect on the quality of the surface layer.

En annan nackdel med anordningen enligt det finska patentet 54878 är lokaliseringen av kalibreringsorganen på avstånd från ytskiktsmunstycket. Detta medför använd- ning av vakuumkalibrering, såsom också påpekas i paten- tet. Framställning av rör med stora dimensioner (över l00 mm) med vakuumkalibrering är emellertid besvärlig på grund av att det är svårt att åstadkomma en kraftigt » tätande kontakt mellan röret och kalibreringsröret. m 10 l5 20 25 30 35 84050 08-7 3 Ändamålet med uppfinningen är att åstadkomma en förbättring i de kända förfarandena. Ett mera detalje- rat ändamàl med uppfinningen är att åstadkomma ett förfarande, vid vilket skumningen och framställningen av ytterröret kan åstadkommas samtidigt i ett steg runt innerröret, och vid vilket ingen vakuumkalibre- ring erfordras. Det är också ett ändamål med förelig- gande uppfinning att åstadkomma ett förfarande, som är lika lämpat för ett rör av stål som ett av plast. Ändamålen med uppfinningen uppnås genom ett för- farande, som huvudsakligen kännetecknas därav, att kalibreringstrycket alstras med hjälp av skumningen, varvid frigöring av kalibreringstrycket förhindras genom den plugg som skummet bildar när det stelnar. Övriga kännetecken hos förfarandet enligt uppfin- ningen framgår av kravet 2. A I Genom förfarandet enligt uppfinningen vinnes otaliga, anmärningsvärda fördelar. Uppfinningen möj- liggör exempelvis ett förfarande för framställning av fjärrvärmeelement, vid vilket förfarande skumningen och framställningen av ytterhöljet kan ske samtidigt i ett steg runt ett stål- eller polyesterrör. Vid förfarandet enligt uppfinningen behövs inte heller någon vakuumkalibrering, såsom är fallet vid exempelvis anordningen enligt finska patentet 54878. Förfarandet enligt uppfinningen är lika väl lämpat för innerrör av stål som av plast.Another disadvantage of the device according to Finnish patent 54878 is the location of the calibration means at a distance from the surface layer nozzle. This involves the use of vacuum calibration, as also pointed out in the patent. However, the production of large dimension (over 100 mm) tubes with vacuum calibration is difficult because it is difficult to achieve a strong sealing contact between the tube and the calibration tube. The object of the invention is to bring about an improvement in the known methods. A more detailed object of the invention is to provide a method in which the foaming and production of the outer tube can be accomplished simultaneously in one step around the inner tube, and in which no vacuum calibration is required. It is also an object of the present invention to provide a method which is as suitable for a steel pipe as one of plastic. The objects of the invention are achieved by a method, which is mainly characterized in that the calibration pressure is generated by means of the foaming, whereby release of the calibration pressure is prevented by the plug which the foam forms when it solidifies. Other features of the method according to the invention appear from claim 2. A I Through the method according to the invention innumerable, remarkable advantages are obtained. The invention enables, for example, a method for the production of district heating elements, in which method the foaming and the production of the outer casing can take place simultaneously in one step around a steel or polyester pipe. The method according to the invention also does not require a vacuum calibration, as is the case with, for example, the device according to Finnish patent 54878. The method according to the invention is just as suitable for inner tubes of steel as of plastic.

Som skumningsmaterial vid förfarandet enligt uppfinningen kan man använda alla sådana skum som har egenskaper, såsom värmetolerans och isolationsför- måga, som är lämpliga för ändamålet.As the foaming material in the process according to the invention, it is possible to use all such foams which have properties, such as heat tolerance and insulating ability, which are suitable for the purpose.

Ett lämpligt skumningsmaterial är exempelvis polyuretan.A suitable foaming material is, for example, polyurethane.

Uppfinningen beskrivs i detalj med hänvisning till en fördelaktig utföringsform av uppfinningen, som visas på den bifogade ritningsfiguren, men vartill uppfinningen inte är avsedd att vara begränsad. l0 15 20 25 30 35 8465008-7 _ 4 Ritningsfiguren visar en föredragen utföringsform av den anordning som utnyttjas vid sättet enligt upp- finningen, sett i längdsektion. 7 På ritningsfiguren har den anordning som används vid sättet enligt uppfinningen allmänt angivits med hänvisningsbeteckningen l0. Vid den föreliggande ut- föringsformen inbegriper anordningen 10 ett plaströr- munstycke ll, som är försett med en ihålig dorn, ett ¿styrstöd 12 för innerröret 17, som är försett med centreringsmöjlighet, en kombinerad innerrörsstyrning och skummunstyckskropp 13, ett yttre vattenkylt kali- breringsrör 14, rör 15, som tillför skummaterialen, samt tillförselkanaler 19 för plastråmaterialet till ytskiktet. Plastytskiktet hos-det isolerande röret som framställs genom förfarandet enligt uppfinningen, anges med hänvisningsbeteckningen 16 och skumplastiso~ leringen med hänvisningsbeteckningen 18.The invention is described in detail with reference to an advantageous embodiment of the invention, which is shown in the accompanying drawing figure, but to which the invention is not intended to be limited. 10 The drawing figure shows a preferred embodiment of the device used in the method according to the invention, seen in longitudinal section. In the drawing figure, the device used in the method according to the invention has generally been indicated by the reference numeral 10. In the present embodiment, the device 10 comprises a plastic pipe nozzle 11, which is provided with a hollow mandrel, a guide support 12 for the inner tube 17, which is provided with centering possibility, a combined inner tube guide and foam nozzle body 13, an outer water-cooled caliper. 14, pipe 15, which supplies the foam materials, and supply channels 19 for the plastic raw material to the surface layer. The plastic layer of the insulating pipe produced by the method according to the invention is indicated by the reference numeral 16 and the foam plastic insulation by the reference numeral 18.

Vid sättet enligt uppfinningen bildas en skumplast- isolering 18 och ett ytskikt 16 runt innerröret 17 samtidigt i ett arbetssteg. Vid skumningen alstras ett kalibreringstryck, som kan regleras genom att reglera râmaterialtillförseln och temperaturen hos skumråmaterialen. Utvändig kylning 14 appliceras för latt kyla ytskiktet 16 vid korrekt dimension. När det stelnar bildar skummet en plugg, som hindrar kalibre- ringstrycket från att frigöras. Tíllverkningshastig- heten, skumbestândsdelarna och längden på kalibrerings- -röret 14 måste väljas så, att skummet har stelnat vid den tidpunkt elementet utkommer från kalibrerings- röret 14. Ytterligare kylorgan och dragorgan kan ut- göras av sådana organ som traditíonellt utnyttjas vid tillverkning av rör, och detsamma gäller för de organ, som matar innerröret 17. zškummunstyckskroppen 13 tjänar också som ett styrorgan för innerröret 17. Munstyckskroppen 13 är isolerad från rörmunstycket ll och kan vara vattenkyld om så erfordras. I munstyckskroppen 13 kan ett flertal 10 15 20 25 30 35 84Ü5ÛÛ8-7 5 skummunstycken vara_anordnade för att åstadkomma en- hetligt skum, och tryckavkänningsorgan kan finnas för att reglera doseringen. Skummunstyckena har instal- lerats så, att skummet utfyller hela utrymmet mellan ytskiktet 16 och innerröret 17 omedelbart efter yt- skiktsmunstycket. Gapet mellan innerröret 17 och mun- styckskroppen 13 avtätas medelst konventionell teknik.In the method according to the invention, a foam insulation 18 and a surface layer 16 are formed around the inner tube 17 simultaneously in one working step. During foaming, a calibration pressure is generated, which can be regulated by regulating the feed material supply and the temperature of the foam raw materials. External cooling 14 is applied to lightly cool the surface layer 16 at the correct dimension. When it solidifies, the foam forms a plug, which prevents the calibration pressure from being released. The rate of action, the foam constituents and the length of the calibration tube 14 must be chosen so that the foam has solidified at the time the element emerges from the calibration tube 14. Additional cooling means and traction means may be constituted by means traditionally used in the manufacture of tubes. , and the same applies to the means feeding the inner tube 17. The foam nozzle body 13 also serves as a guide means for the inner tube 17. The nozzle body 13 is insulated from the tube nozzle 11 and may be water cooled if required. In the nozzle body 13, a plurality of foam nozzles may be provided to provide uniform foam, and pressure sensing means may be provided to control the dosing. The foam nozzles have been installed so that the foam fills the entire space between the surface layer 16 and the inner tube 17 immediately after the surface layer nozzle. The gap between the inner tube 17 and the nozzle body 13 is sealed by conventional technology.

Om så erfordras, kan en luftningsventil också vara monterad på munstyckskroppen 13, vilken ventil är i funktion i initialskedet. Konstruktionen av munstycke- kroppen 13 kan också vara av det slag som sträcker sig i maskinriktningen, och på detta sätt förkyles innerytan av skyddshöljet 16. Kalibreringsröret 14 är anordnat intill munstycket'll såsom krävs vid tryck- kalibreringstekniken.If required, an aeration valve may also be mounted on the nozzle body 13, which valve is operative in the initial stage. The construction of the nozzle body 13 can also be of the type extending in the machine direction, and in this way the inner surface of the protective cover 16 is pre-cooled. The calibration tube 14 is arranged next to the nozzle as required by the pressure calibration technique.

Rörmunstycket 11 kan vara försett med konventionell centrering och med en skruvlinjeformad fördelare eller motsvarande konstruktioner som är kända inom tekniken.The pipe nozzle 11 may be provided with conventional centering and with a helical distributor or similar constructions known in the art.

Plastblandningen kan inmatas i munstycket ll medelst en eller flera strängsprutningsanordningar. För att åstadkomma ytskiktet 16 kan också samsträngsprutnings- förfaranden utnyttjas.The plastic mixture can be fed into the nozzle 11 by means of one or more extruders. To provide the surface layer 16, coextrusion methods can also be used.

Tvärsektionen hos slitsen till munstycket ll och till kalibreringsröret 14 behöver inte vara cirkulär.The cross section of the slot to the nozzle 11 and to the calibration tube 14 need not be circular.

En oval form eller någon annan form kan vara mera fördelaktig när två eller flera rör isoleras.An oval shape or some other shape may be more advantageous when two or more tubes are insulated.

Genom föreliggande förfarande kan fjärrvärmeele- ment tillverkas i ett arbetssteg. Genom den nya typen av tryckkalibrering kan också stora dimensioner fram- ställas. Tjockleksprofilen hos skyddsskiktet 16 kan också regleras noga och ytterytan på skyddsskiktet 16 är slät och anpassar sig exakt till dimensionen.By means of the present method, district heating elements can be manufactured in one working step. Through the new type of pressure calibration, large dimensions can also be produced. The thickness profile of the protective layer 16 can also be carefully adjusted and the outer surface of the protective layer 16 is smooth and adapts exactly to the dimension.

Lokaliseringen av skummunstyckena i förbindelse med ytskiktsmunstycket säkerställer att inga hàlrum lämnas i skummet. Förfarandet säkerställer också god vidhäft- ning mellan skummet och innerröret 17 samt mellan skummet och ytskiktet.The location of the foam nozzles in connection with the surface layer nozzle ensures that no voids are left in the foam. The method also ensures good adhesion between the foam and the inner tube 17 and between the foam and the surface layer.

Claims (2)

10 15 20 84050B8Tf=7 PATENTKRAV10 15 20 84050B8Tf = 7 PATENT CLAIMS 1. Sätt att framställa ett rör av isolerande material innefattande ett eller flera innerrör (17), en plastskumisolering (18) och ett plastytskikt (16), vid vilket sätt skummande material leds så att det _omger innerröret (17) för att skapa en'skummad plast- isolering (18), Och på motsvarande sätt leds plastrå- material för att skapa ett ytskikt (16), och runt innerröret (17) åstadkommes den skummade plastisole- ringen (18) och ytskiktet (16) samtidigt i ett arbets- steg, varjämte vid sättet ytskiktet (16) kyles till önskad dimension i ett kalibreringsorgan (14), mot vars inneryta ytskiktet (16) pressas med hjälp av ett kalibreringstryck, k ä n n e t e c k n a t därav, att kalibreringstrycket âstadkommes med hjälp av skum- ningen, varvid frigöring av kalibreringstrycket för- -hindras genom den plugg som bildas av skummet när det stelnar.A method of making a pipe of insulating material comprising one or more inner pipes (17), a plastic foam insulation (18) and a plastic surface layer (16), in which manner foaming material is guided so as to surround the inner pipe (17) to create a ' foamed plastic insulation (18), and correspondingly plastic raw material is led to create a surface layer (16), and around the inner tube (17) the foamed plastic insulation (18) and the surface layer (16) are provided simultaneously in a working layer. step, and in the method the surface layer (16) is cooled to the desired dimension in a calibration means (14), against whose inner surface the surface layer (16) is pressed by means of a calibration pressure, characterized in that the calibration pressure is achieved by means of the foaming, release of the calibration pressure is prevented by the plug formed by the foam as it solidifies. 2. Sätt enligt kravet 1, därav, att reglering av kalibreringstrycket åstadkommas k ä n n e t e c k n a t genom att reglera skumråmaterialtillförseln och tempe- raturen hos råmaterialet.2. A method according to claim 1, wherein control of the calibration pressure is achieved by controlling the supply of foam raw material and the temperature of the raw material.
SE8405008A 1983-02-14 1984-10-08 SET FOR MANUFACTURING A PIPE OF INSULATING MATERIALS INCLUDING ONE OR MORE INTERNAL PIPES, A PLASTIC FOAM INSULATION AND PLASTIC LAYER SE441732B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI830487A FI830487L (en) 1983-02-14 1983-02-14 FOERFARANDE FOER TILLVERKNING AV EN VAERMEISOLERANDE MANTEL ELLER KANAL FOER ETT ELLER FLERA ROER.

Publications (3)

Publication Number Publication Date
SE8405008L SE8405008L (en) 1984-10-08
SE8405008D0 SE8405008D0 (en) 1984-10-08
SE441732B true SE441732B (en) 1985-11-04

Family

ID=8516751

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8405008A SE441732B (en) 1983-02-14 1984-10-08 SET FOR MANUFACTURING A PIPE OF INSULATING MATERIALS INCLUDING ONE OR MORE INTERNAL PIPES, A PLASTIC FOAM INSULATION AND PLASTIC LAYER

Country Status (10)

Country Link
BE (1) BE898894A (en)
DE (1) DE3490043T1 (en)
DK (1) DK482484D0 (en)
FI (1) FI830487L (en)
FR (1) FR2540782B1 (en)
GB (1) GB2146286A (en)
NL (1) NL8420024A (en)
NO (1) NO843995L (en)
SE (1) SE441732B (en)
WO (1) WO1984003066A1 (en)

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WO2012002834A1 (en) * 2010-06-28 2012-01-05 Общество С Ограниченной Ответственностью "Cmиt-Яpцebo" Method for manufacturing a thermally insulated flexible tube
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FI54878C (en) * 1973-01-25 1979-04-10 Rakennusmuovi Oy ANORDING FOR FOUNDATION FROM ISOLERROER
JPS5435231B2 (en) * 1974-03-09 1979-11-01
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DE2758632C2 (en) * 1977-12-29 1985-08-14 Sekisui Kaseihin Kogyo K.K., Nara Device for the production of a foamed body with the structure of wood from crystalline plastics

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DK482484A (en) 1984-10-09
WO1984003066A1 (en) 1984-08-16
BE898894A (en) 1984-05-30
FR2540782A1 (en) 1984-08-17
DE3490043T1 (en) 1985-02-07
FR2540782B1 (en) 1988-07-22
NL8420024A (en) 1984-12-03
NO843995L (en) 1984-10-04
GB2146286A (en) 1985-04-17
FI830487A0 (en) 1983-02-14
FI830487L (en) 1984-08-15
SE8405008L (en) 1984-10-08
SE8405008D0 (en) 1984-10-08
GB8425636D0 (en) 1984-11-14
DK482484D0 (en) 1984-10-09

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