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WO1999033638A1 - Method for producing a saucer-shaped vacuum insulating panel and use of same as insulating element - Google Patents

Method for producing a saucer-shaped vacuum insulating panel and use of same as insulating element Download PDF

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Publication number
WO1999033638A1
WO1999033638A1 PCT/EP1998/008076 EP9808076W WO9933638A1 WO 1999033638 A1 WO1999033638 A1 WO 1999033638A1 EP 9808076 W EP9808076 W EP 9808076W WO 9933638 A1 WO9933638 A1 WO 9933638A1
Authority
WO
WIPO (PCT)
Prior art keywords
producing
vacuum
panel
saucer
vacuum chamber
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.)
Ceased
Application number
PCT/EP1998/008076
Other languages
German (de)
French (fr)
Inventor
Karl Werner Dietrich
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.)
Bayer AG
Original Assignee
Bayer AG
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 Bayer AG filed Critical Bayer AG
Publication of WO1999033638A1 publication Critical patent/WO1999033638A1/en
Anticipated expiration legal-status Critical
Ceased 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
    • F16L59/06—Arrangements using an air layer or vacuum
    • F16L59/065—Arrangements using an air layer or vacuum using vacuum
    • 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
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/02—Bending or folding
    • B29C53/04—Bending or folding of plates or sheets
    • B29C53/06—Forming folding lines by pressing or scoring
    • B29C53/063—Forming folding lines by pressing or scoring combined with folding
    • 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
    • B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
    • B29C63/18—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using tubular layers or sheathings
    • B29C63/20—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using tubular layers or sheathings using pressure difference, e.g. vacuum
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
    • E04C2/32—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure formed of corrugated or otherwise indented sheet-like material; composed of such layers with or without layers of flat sheet-like material
    • E04C2/328—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure formed of corrugated or otherwise indented sheet-like material; composed of such layers with or without layers of flat sheet-like material slightly bowed or folded panels not otherwise provided for
    • 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
    • B29C2793/00—Shaping techniques involving a cutting or machining operation
    • B29C2793/0054—Shaping techniques involving a cutting or machining operation partially cutting through the material
    • 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
    • B29C2793/00—Shaping techniques involving a cutting or machining operation
    • B29C2793/0081—Shaping techniques involving a cutting or machining operation before shaping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0012—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular thermal properties
    • B29K2995/0015—Insulating
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F2203/00—Specially structured or shaped covering, lining or flooring elements not otherwise provided for
    • E04F2203/08—Specially structured or shaped covering, lining or flooring elements not otherwise provided for with a plurality of grooves or slits in the back side, to increase the flexibility or bendability of the elements

Definitions

  • the invention relates to bowl-shaped vacuum insulation panels and their use as thermal insulation material.
  • Vacuum insulation panels are usually manufactured according to the following production scheme:
  • a rigid plate made of a porous material - usually made of a rigid plastic foam - is placed in a foil pouch sealed on 3 sides. The 4th side is then sealed in a vacuum chamber.
  • the foil pouch usually consists of a multi-layer foil with the main components: aluminum as a barrier layer and polyethylene as a sealing layer.
  • This process produces high-performance insulation materials that are superior to all other materials in their low thermal conductivity.
  • Cup-shaped, i.e. curved insulation elements cannot be manufactured or only with great difficulty.
  • the use of such shaped insulation elements would be e.g. for the insulation of curved surfaces, e.g. Pipes desirable.
  • the task was therefore to find a method for producing curved vacuum insulation panels.
  • cup-shaped vacuum insulation panels can be produced with excellent dimensional accuracy by using the
  • the invention therefore relates to a method for producing a shell-shaped vacuum insulation panel, in which
  • the plate is sealed on all sides with a gas-tight film in a vacuum chamber
  • the atmospheric pressure acting on the vacuum insulation panel thus produced in accordance with the invention causes the vacuum insulation panel to bend.
  • the radius of curvature of the panel can be calculated precisely in advance by the number and width of the milled grooves.
  • the grooves can e.g. B. be milled with circular saws or grinding wheels.
  • the grooves can have a rectangular or trapezoidal profile (drawing purple +
  • the grooves should preferably penetrate 50 to 75% based on the plate thickness into the plate.
  • the porous plastic plate can consist of polystyrene or polyurethane, for example.
  • the plate preferably consists of porous polyurethane, in particular of polyurethane waste or recycled compressed polyurethane flakes or powder.
  • Another object of the invention is the use of the cup-shaped vacuum insulation panels produced according to the invention as thermal insulation elements, on curved surfaces, for example cooling device doors, the pipe insulation and in cylinder-shaped hot water tanks.
  • a plate with the dimensions 480 x 460 x 25 mm is provided with 9 transverse grooves at a distance of 46 mm, a groove width of 3 mm and a groove depth of 16 mm.
  • the grooves are milled using a circular saw.
  • the plate prepared in this way is placed in a film bag (structure of the film: polyethylene, aluminum 6 ⁇ , polyester), brought to an internal pressure of 0.5 mbar in a vacuum chamber and thermally sealed at the edge. After venting the vacuum chamber, the previously flat panel deforms into a quarter shell with a radius of

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Thermal Insulation (AREA)

Abstract

The invention relates to a method for producing a saucer-shaped vacuum insulating panel. According to said method a) straight grooves are placed parallel to each other across the entire surface of one side of a flat panel made of a porous plastic material, b) said panel is vacuum-sealed on all sides with a gas-tight film in a vacuum chamber, and c) normal pressure is restored in the vacuum chamber.

Description

Verfahren zur Herstellung eines schalenförmigen Vakuumisolierpaneels sowie dessen Verwendung als DämmelementProcess for producing a shell-shaped vacuum insulation panel and its use as an insulation element

Die Erfindung betrifft schalenförmige Vakuumisolierpaneele sowie deren Verwendung als thermisches Dämmaterial.The invention relates to bowl-shaped vacuum insulation panels and their use as thermal insulation material.

Vakuumisolierpaneele werden in der Regel nach folgendem Produktionsschema hergestellt:Vacuum insulation panels are usually manufactured according to the following production scheme:

Eine starre Platte aus einem porigen Material - in der Regel aus einem starren Kunst- stoffschaumstoff - wird in einen auf 3 Seiten versiegelten Foüenbeutel eingelegt. In einer Vakuumkammer wird dann die 4. Seite versiegelt.A rigid plate made of a porous material - usually made of a rigid plastic foam - is placed in a foil pouch sealed on 3 sides. The 4th side is then sealed in a vacuum chamber.

Der Folienbeutel besteht in der Regel aus einer mehrschichtigen Folie mit den Haupt- komponenten: Aluminium als Sperrschicht und Polyethylen als Siegelschicht.The foil pouch usually consists of a multi-layer foil with the main components: aluminum as a barrier layer and polyethylene as a sealing layer.

Nach diesem Verfahren erhält man Hochleistungsdämmstoffe, die in ihrer niedrigen Wärmeleitfähigkeit allen anderen Materialien überlegen sind.This process produces high-performance insulation materials that are superior to all other materials in their low thermal conductivity.

Ihre Anwendung wird jedoch eingeschränkt durch die Notwendigkeit, die Siegelnähte stets in der Ebene anzubringen. Schalenförmige, d.h. gekrümmte Dämmelemente lassen sich nicht bzw. nur umständlich herstellen. Der Einsatz derartig geformter Dämmelemente wäre z.B. zur Isolierung gekrümmter Oberflächen, z.B. Rohren wünschenswert.However, their application is limited by the need to always apply the sealing seams in the plane. Cup-shaped, i.e. curved insulation elements cannot be manufactured or only with great difficulty. The use of such shaped insulation elements would be e.g. for the insulation of curved surfaces, e.g. Pipes desirable.

Es bestand somit die Aufgabe, ein Verfahren zur Herstellung gekrümmter Vakuumisolierpaneele aufzufinden.The task was therefore to find a method for producing curved vacuum insulation panels.

Überraschenderweise wurde nun gefunden, daß man schalenförmige Vakuumisolier- paneele mit hervorragender Maßgenauigkeit herstellen kann, indem man vor demSurprisingly, it has now been found that cup-shaped vacuum insulation panels can be produced with excellent dimensional accuracy by using the

Evakuieren und Versiegeln des Vakuumisolierpaneels in die Kernplatte auf einer Seite Rillen einfräßt (Zeichnung I). Nach dem Evakuieren, Versiegeln und Belüften der Vakuumkammer wird dann das Vakuumisoüerpaneel unter der Einwirkung des Luftdruckes gemäß Zeichnung II zur gekerbten Seite hin gekrümmt.Evacuate and seal the vacuum insulation panel into grooves in the core plate on one side (drawing I). After evacuating, sealing and ventilating the vacuum chamber, the vacuum isoer panel is then curved towards the notched side under the influence of the air pressure according to drawing II.

Gegenstand der Erfindung ist daher ein Verfahren zur Herstellung eines schalenförmigen Vakuumisolierpaneels, bei dem manThe invention therefore relates to a method for producing a shell-shaped vacuum insulation panel, in which

a) auf einer Seite einer ebenen Platte aus porigem Kunststoff parallel zueinander über die gesamte Fläche verlaufende geradlinige Rillen anbringt,a) making linear grooves running parallel to one another over the entire surface on one side of a flat plate made of porous plastic,

b) die Platte allseitig mit einer gasdichten Folie in einer Vakuumkammer vakuumdicht versiegelt,b) the plate is sealed on all sides with a gas-tight film in a vacuum chamber,

c) die Vakuumkammer anschließend wieder auf Normaldruck belüftet.c) the vacuum chamber is then vented back to normal pressure.

Der auf das so erfindungsgemäß hergestellte Vakuumisolierpaneel einwirkende Atmosphärendruck bewirkt eine Krümmung des Vakuumisolierpaneels.The atmospheric pressure acting on the vacuum insulation panel thus produced in accordance with the invention causes the vacuum insulation panel to bend.

Hierbei läßt sich der Krümmungsradius des Paneels durch die Anzahl und die Breite der eingefräßten Rillen genau vorausberechnen.The radius of curvature of the panel can be calculated precisely in advance by the number and width of the milled grooves.

Die Rillen können z. B. mit Kreissägen oder Schleifscheiben eingefräßt werden.The grooves can e.g. B. be milled with circular saws or grinding wheels.

Die Rillen können rechteckiges oder trapezförmiges Profil haben (Zeichnung lila +The grooves can have a rectangular or trapezoidal profile (drawing purple +

Illb).Illb).

Die Rillen sollten vorzugsweise 50 bis 75 % bezogen auf die Plattendicke in die Platte eindringen.The grooves should preferably penetrate 50 to 75% based on the plate thickness into the plate.

Die porige Kunstoffplatte kann z.B. aus Polystyrol oder Polyurethan bestehen. Bevorzugt besteht die Platte aus porigem Polyurethan, insbesondere aus Polyurethanabfällen recyclten verpreßten Polyurethanflocken oder -pulver. Ein weiterer Gegenstand der Erfindung ist die Verwendung der erfindungsgemäß hergestellten schalenförmigen Vakuumisolierpaneele als thermische Dämmelemente,bei gekrümmten Oberflächen, z.B. Kühlgerätetüren, der Rohrisolierung sowie bei zylin- derförmigen Heißwasserspeichern. The porous plastic plate can consist of polystyrene or polyurethane, for example. The plate preferably consists of porous polyurethane, in particular of polyurethane waste or recycled compressed polyurethane flakes or powder. Another object of the invention is the use of the cup-shaped vacuum insulation panels produced according to the invention as thermal insulation elements, on curved surfaces, for example cooling device doors, the pipe insulation and in cylinder-shaped hot water tanks.

Beispielexample

Eine Platte mit den Maßen 480 x 460 x 25 mm wird mit 9 quer laufenden Rillen im Abstand von 46 mm, einer Rillenbreite von 3 mm und einer Rillentiefe von 16 mm versehen. Die Rillen werden mittels einer Kreissäge eingefräßt.A plate with the dimensions 480 x 460 x 25 mm is provided with 9 transverse grooves at a distance of 46 mm, a groove width of 3 mm and a groove depth of 16 mm. The grooves are milled using a circular saw.

Die so vorbereitete Platte wird in einem Folienbeutel (Aufbau der Folie: Polyethylen, Aluminium 6 μ, Polyester) gesteckt, in einer Vakuumkammer auf 0,5 mbar Innendruck gebracht und am Rand thermisch versiegelt. Nach Belüften der Vakuumkammer verformt sich das vorher ebene Paneel zu einer Viertelschale mit einem Radius vonThe plate prepared in this way is placed in a film bag (structure of the film: polyethylene, aluminum 6 μ, polyester), brought to an internal pressure of 0.5 mbar in a vacuum chamber and thermally sealed at the edge. After venting the vacuum chamber, the previously flat panel deforms into a quarter shell with a radius of

300 mm. 300 mm.

Claims

Patentansprüche claims 1. Verfahren zur Herstellung eines schalenförmigen Vakuumisolierpaneels, bei dem man1. A process for producing a cup-shaped vacuum insulation panel, in which a) auf einer Seite einer ebenen Platte aus porigen Kunsstoff parallel zueinander über die gesamte Fläche verlaufende geradlinige Rillen anbringt,a) making linear grooves running parallel to one another over the entire surface on one side of a flat plate made of porous plastic, b) die Platte allseitig mit einer gasdichten Folie in einer Vakuumkammer vakuumdicht versiegelt,b) the plate is sealed on all sides with a gas-tight film in a vacuum chamber, c) die Vakuumkammer anschließend wieder auf Normaldruck belüftet.c) the vacuum chamber is then vented back to normal pressure. 2. Verwendung von gemäß Anspruch 1 hergestellten schalenförmigen Vakuum isolierpaneelen als thermische Dämmelemente 2. Use of cup-shaped vacuum insulating panels produced according to claim 1 as thermal insulation elements
PCT/EP1998/008076 1997-12-23 1998-12-10 Method for producing a saucer-shaped vacuum insulating panel and use of same as insulating element Ceased WO1999033638A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19757541A DE19757541A1 (en) 1997-12-23 1997-12-23 Process for producing a shell-shaped vacuum insulation panel and its use as an insulation element
DE19757541.2 1997-12-23

Publications (1)

Publication Number Publication Date
WO1999033638A1 true WO1999033638A1 (en) 1999-07-08

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PCT/EP1998/008076 Ceased WO1999033638A1 (en) 1997-12-23 1998-12-10 Method for producing a saucer-shaped vacuum insulating panel and use of same as insulating element

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DE (1) DE19757541A1 (en)
WO (1) WO1999033638A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19933120C1 (en) * 1999-07-19 2001-03-01 Kunststofftechnik Schedel Gmbh Tub support made of rigid foam for setting up a bath or shower tray on an essentially flat surface
DE10125964A1 (en) * 2001-05-29 2002-12-12 Oesterr Heraklith Gmbh moldings
US20030000152A1 (en) * 2001-06-29 2003-01-02 Ryan James P. Apparatus for protecting a structural column
DE202011050315U1 (en) * 2011-05-31 2012-09-03 Christoph Jaeger buffer memory
US9243836B2 (en) 2012-01-06 2016-01-26 Lg Hausys, Ltd. Heat insulation door for a refrigerator having 3 dimensional shapes

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4215798A (en) * 1979-01-15 1980-08-05 Union Carbide Corporation Container for cryogenic liquid
EP0031468A1 (en) * 1979-12-21 1981-07-08 Hüls Troisdorf Aktiengesellschaft Insulating envelope of cellular plastic and process for its production
US5310594A (en) * 1990-02-05 1994-05-10 Rock Wool Manufacturing Co. Composite rigid insulation materials containing V-grooves
WO1996032605A1 (en) * 1995-04-13 1996-10-17 Imperial Chemical Industries Plc Non-planar evacuated insulation panels and a method for making same

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT43991B (en) * 1909-03-04 1910-09-10 Fernand Maurice Plancq Collapsible box.
DE2930887A1 (en) * 1979-07-30 1981-02-19 Hymer Kg Curved foam core sandwich panels - where panels are bent after receiving saw cuts on inner face at bend area
JPH05203246A (en) * 1991-09-12 1993-08-10 Glass Master Corp Cutting and processing device and method of circular duct from duct board and circular air duct manufactured by it

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4215798A (en) * 1979-01-15 1980-08-05 Union Carbide Corporation Container for cryogenic liquid
EP0031468A1 (en) * 1979-12-21 1981-07-08 Hüls Troisdorf Aktiengesellschaft Insulating envelope of cellular plastic and process for its production
US5310594A (en) * 1990-02-05 1994-05-10 Rock Wool Manufacturing Co. Composite rigid insulation materials containing V-grooves
WO1996032605A1 (en) * 1995-04-13 1996-10-17 Imperial Chemical Industries Plc Non-planar evacuated insulation panels and a method for making same

Also Published As

Publication number Publication date
DE19757541A1 (en) 1999-07-01

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