WO2001083188A1 - Procede de production d'une caisse et d'une porte de refrigerateur - Google Patents

Procede de production d'une caisse et d'une porte de refrigerateur Download PDF

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Publication number
WO2001083188A1
WO2001083188A1 PCT/TR2001/000018 TR0100018W WO0183188A1 WO 2001083188 A1 WO2001083188 A1 WO 2001083188A1 TR 0100018 W TR0100018 W TR 0100018W WO 0183188 A1 WO0183188 A1 WO 0183188A1
Authority
WO
WIPO (PCT)
Prior art keywords
cabinet
production method
refrigerator
refrigerator cabinet
door production
Prior art date
Application number
PCT/TR2001/000018
Other languages
English (en)
Inventor
Fatih ÖZKADI
Sibel ODABAŞ
Esra KÜÇÜKPINAR
Original Assignee
Arçelik A.Ş.
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 Arçelik A.Ş. filed Critical Arçelik A.Ş.
Priority to AU2001262891A priority Critical patent/AU2001262891A1/en
Publication of WO2001083188A1 publication Critical patent/WO2001083188A1/fr

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
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
    • B29C44/1257—Joining a preformed part and a lining, e.g. around the edges
    • 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
    • B29C44/005—Avoiding skin formation; Making foams with porous surfaces

Definitions

  • the present invention relates to a method of producing a cabinet and a door for a refrigerator, comprising the steps of; providing an open cell polyurethane foam cabinet to be placed between the refrigerator inner and outer shells, assembling and vacuum-insulating the said inner and outer shells by placing the foam cabinet in the space formed between them.
  • the object is to provide a refrigerator with an inner space as large as possible while keeping constant its external volume, and which does not consume much energy.
  • These features namely a large inner volume and little energy consumption depend on the insulation system to a large extend.
  • the performance of the insulation system depends on the type of the insulation and coating materials used, to the coefficients of thermal conductivity and to the thickness of the insulation on the walls of the refrigerator.
  • the external dimensions of the refrigerators are limited by the standards.
  • the thickness of the used insulating material should be reduced, as the external dimensions cannot be modified.
  • reducing the said thickness of the insulating material has also certain limits.
  • the said insulating material and/or the inner and/or outer coating materials have to have a lower coefficient of heat transmission.
  • sheet metal is used on the outer surfaces of the cabinet and the door.
  • Thermoplastic materials such as PS-Polystyrene or ABS-Acrylonitrile Butadiene Styrene are used for their inner surfaces.
  • Polyurethane obtained by mixing polyole, isocyanate and a foaming gas in a specified ratio, is also used as an insulating material.
  • polyurethane in a molten form is injected into the insulation space, it adheres to the iron sheet which is the outer coating material and to the plastic inner coating material.
  • a structure with a high mechanical strength is achieved by this adhesion process.
  • shaping the sheet metal is quite difficult and expensive, the freedom of designing the external appearance of the refrigerator is restricted. Furthermore, by this insulation system, it is not possible to provide more inner volume with the provision that its external dimensions remain constant and to consume less energy without modifying the existing cooling system.
  • U.S. Patent No. 5533311 relates to a refrigerator door produced by thermoforming two plastic panels.
  • the inner plastic panel comprises one or more recesses wherein the gasket can be placed and the joining seam where at the outer panel meets the inner liner, cannot be seen from outside.
  • a foamy insulation material the nature of which has not been disclosed fully in technical terms, is injected into the insulation gap.
  • the outer refrigerator door panel is made of thermoplastic resin and the inner panel is made of plastics.
  • the inner and outer plastic panels are connected by means of a special profile which also enables the gasket to be placed. No information with regard to the filler material used to fill in the insulation gap, is given.
  • the European Patent No. EP 0587548 relates to the insulation for a refrigerator or freezer, hi this patent a material which is placed in a hermetically closed hollow cabinet wall and communicating with a cheap and energy saving vacuum pump and which provides heat insulation, is disclosed.
  • the insulation material comprises closed cells with a gas which can diffuse through the walls.
  • the low thermal conductivity coefficient of the insulating material used between the inner and outer panels in the vacuum insulation systems for the refrigerator door or cabinet depends on the fact that it has open cells.
  • the thermal conductivity coefficient of the insulation system becomes higher, which in turn increases the energy consumption of the refrigerator.
  • the main object of the present invention is to provide the enlargement of the inner volume of the refrigerators without making any modifications on its external volume, to facilitate the decorative shaping of the refrigerator cabinet and door, and to provide less energy consumption by enhancing the insulation performance.
  • Another object of the present invention is to reduce the vacuum-insulation period by minimizing the gap between the material used for the inner and outer panels of the refrigerator insulation systems and the insulating material contained between the said panels.
  • Yet another object of the invention is the use of the foam cabinet utilized as the insulation material, as a mould when the inner and outer structures are thermoformed.
  • Another object of the invention is to make possible the easy dismounting of the refrigerator at the end of it service life and its re-utilization.
  • Figure 1 is the section view of the foam cabinet with shell, which has been shaped according to the refrigerator cabinet.
  • FIG 2 is detail- A of Figure 1, of the shell foam cabinet
  • Figure 3 is the section view of the refrigerator cabinet comprising a compressor space.
  • Figure 4 is the exploded view of the polyurethane injection moulds for the Refrigerator Cabinet comprising a compressor space.
  • Figure 5 is the schematic drawing showing the fixation of the foam cabinet to the thermoforming machine for producing the external plastic structure.
  • Figure 6 is the schematic drawing showing the fixation of the foam cabinet to the thermoforming machine for producing the internal plastic structure.
  • the refrigerator cabinet or the refrigerator door produced by using the method of the present invention consists of an internal (2) and an external structure (3).
  • the refrigerator cabinet consists of an external cabinet (3), an internal cabinet (2) and a foam cabinet (1) between the former two cabinets (3,2) which is obtained from an open cell polyurethane isolating material, which is foamed by PFA or CO 2 ,.
  • the refrigerator door has the same structure, i.e. it consists of an external and an internal door and a foam filler between them, obtained from an open cell polyurethane isolating material, which is foamed by PFA or CO 2 ⁇ .
  • a mould release agent is applied onto the inner surfaces of the male and female moulds (5 and 6) wherein open cell polyurethane material will be moulded, so that adhesion is prevented and the polyurethane is easily removed from the mould without any damage.
  • the open cell polyurethane which is poured into the mould through the injection hole (7), is cooled and solidified, it is removed from the mould, in the form of a foam cabinet (1) and is secured on a multi-axial shell- stripping machine in order to remove the shell (4) formed on its surface. This machine moves in different axes and realizes the process of stripping the shell formed on the foam cabinet.
  • the shell (4) is removed at a homogeneous thickness from the foam cabinet surface by using a laser or a milling cutter and finally a foam cabinet (1) with entirely open cells and with the desired insulation thickens, is obtained.
  • the plastic material making up the inner and outer structures of the refrigerators which are used for producing inner and outer cabinet and doors, are selected from multi-layer composites that can keep the vacuum and that will not loose their characteristics in time, and which have controlled gas and vapour permeability.
  • the foam cabinet (1) after removing the shell, can be used as a thermoform mould for the shaping of these elements.
  • the foam cabinet (1) is supported by metal profiles (8), from its inner side for shaping the outer plastic composite cabinet (3) and from its outer side for shaping the inner plastic composite cabinet (2).
  • the composite plastic panels brought to the desired temperature between the heaters of the thermoforming device are formed on the foam cabinet (1) with the help of vacuum.
  • the foam is made of open cell material, there is no need for vacuum holes. In this way, a minimum amount of space is left between the open cell polyurethane foam cabinet (1) and the imier/outer composite structures during the vacuum insulation of the system and the said plastic inner and outer structures take exactly the form of the foam cabinet (1).
  • the foam cabinet (1) after removing the shell, is placed between the plastic multilayered composite inner and outer structures which are obtained as the result of the injection process or by the known vacuum thermoforming methods, or by the method described above. After placing the vacuuming system, the inner and outer composite plastic structures are welded together and sealed by using such methods as ultrasonic welding, vibration welding, laser welding or hot welding. After the vacuuming, the production of the insulation system is completed. As the gap left between the foam cabinet (1) and the inner/outer composite plastic structures is minimized, the period for obtaining the vacuum is shortened and the speed of production is increased.
  • a plastic decorative sheet is provided on the welded joints for aesthetic purposes.
  • the open cell polyurethane does not adhere to the inner and outer plastic structure, it is easy to remove the foam cabinet (1) when the service life of the refrigerator is terminated. In this way, the inner and outer composite plastic structures and the foam cabinet (1) formed with open cell polyurethane material may be recycled.
  • the male and female moulds are arranged on the outer side of the foam cabinet (1) without leaving a compressor gap (9).
  • the same steps of the method used for producing the refrigerator cabinet are realized and thus the refrigerator door insulation is provided.

Landscapes

  • Refrigerator Housings (AREA)

Abstract

Selon le procédé de production de l'invention, la peau (4) formée sur la surface extérieure du bloc de mousse (1), produit à partir de matériau polyuréthanne à cellules ouvertes, est enlevée et éliminée de façon à obtenir un meilleur vide. Le bloc de mousse sans peau est alors utilisé pour former les structures intérieure (2) et extérieure (3). Il est ainsi possible de faire des économies d'énergie en raison d'une meilleure isolation et d'une formation plus facile de la caisse du réfrigérateur. Finalement, le bloc de mousse est placé entre les structures intérieure (2) et extérieure (3), le vide est appliqué et les deux structures sont jointes formant les parois et la porte du réfrigérateur.
PCT/TR2001/000018 2000-04-28 2001-04-25 Procede de production d'une caisse et d'une porte de refrigerateur WO2001083188A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001262891A AU2001262891A1 (en) 2000-04-28 2001-04-25 Method of producing a refrigerator cabinet and door

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR200001194 2000-04-28
TR2000/1194 2000-04-28

Publications (1)

Publication Number Publication Date
WO2001083188A1 true WO2001083188A1 (fr) 2001-11-08

Family

ID=21622455

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/TR2001/000018 WO2001083188A1 (fr) 2000-04-28 2001-04-25 Procede de production d'une caisse et d'une porte de refrigerateur

Country Status (2)

Country Link
AU (1) AU2001262891A1 (fr)
WO (1) WO2001083188A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0037987A2 (fr) * 1980-04-15 1981-10-21 Messerschmitt-Bölkow-Blohm Gesellschaft mit beschränkter Haftung Procédé de fabrication de corps moulés soutenus par un noyau cellulaire tels que des ailes, des pales de rotor, etc. de grande dimension en longueur et en largeur
JPH06337093A (ja) * 1993-05-27 1994-12-06 Matsushita Refrig Co Ltd 真空断熱材パック
WO1998039156A1 (fr) * 1997-03-04 1998-09-11 Bayer Aktiengesellschaft Elements moules constitutifs de refrigerateurs et leur procede de fabrication
JPH11198265A (ja) * 1998-01-13 1999-07-27 Mitsubishi Electric Corp 真空断熱パネル及びその製造方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0037987A2 (fr) * 1980-04-15 1981-10-21 Messerschmitt-Bölkow-Blohm Gesellschaft mit beschränkter Haftung Procédé de fabrication de corps moulés soutenus par un noyau cellulaire tels que des ailes, des pales de rotor, etc. de grande dimension en longueur et en largeur
JPH06337093A (ja) * 1993-05-27 1994-12-06 Matsushita Refrig Co Ltd 真空断熱材パック
WO1998039156A1 (fr) * 1997-03-04 1998-09-11 Bayer Aktiengesellschaft Elements moules constitutifs de refrigerateurs et leur procede de fabrication
JPH11198265A (ja) * 1998-01-13 1999-07-27 Mitsubishi Electric Corp 真空断熱パネル及びその製造方法

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1995, no. 03 28 April 1995 (1995-04-28) *
PATENT ABSTRACTS OF JAPAN vol. 1999, no. 12 29 October 1999 (1999-10-29) *

Also Published As

Publication number Publication date
AU2001262891A1 (en) 2001-11-12

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