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Title:
AN EXTERNAL WALL SUITABLE FOR USE IN A COOLER BODY AND/OR DOOR, AND THE PRODUCTION METHOD THEREOF
Document Type and Number:
WIPO Patent Application WO/2019/132812
Kind Code:
A2
Abstract:
The present invention relates to a cooler (1) comprising a body (2), a door (3) enabling access into the body (2), an internal wall forming the side of the cooler (1) facing its inner volume, and an external wall (4) provided on the side of the cooler (1) facing outside, having a fiber based inner surface (6), a carbon fiber based outer surface (5) and a binding agent (7) enabling fixing the inner and the outer surfaces (5, 6) to each other.

Inventors:
YUCEL, Orcun (Karaagac Caddesi 2-6, Sutluce Beyoglu, Istanbul, 34445, TR)
Application Number:
TR2018/050581
Publication Date:
July 04, 2019
Filing Date:
October 10, 2018
Export Citation:
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Assignee:
ARCELIK ANONIM SIRKETI (Karaagac Caddesi 2-6, Sutluce Beyoglu, Istanbul, 34445, TR)
International Classes:
F25D23/00
Attorney, Agent or Firm:
ANKARA PATENT BUREAU (Kavaklidere Mahallesi, Bestekar Sokak No:10, Ankara, 06680, TR)
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Claims:
CLAIMS

1. A cooler (1) comprising a body (2), a door (3) enabling access into the body (2), an internal wall forming the side of the cooler (1) facing its inner volume, characterized by

• an external wall (4) provided on the side of the cooler (1) facing outside, having

• a fiber based inner surface (6),

• a carbon fiber based outer surface (5) and a binding agent (7) enabling fixing the inner and the outer surfaces (5, 6) to each other.

2. A cooler (1) according to claim 1, characterized by the outer surface (5) which is carbon fiber, aramid or colored carbon fiber.

3. A cooler (1) according to claim 1, 2, characterized by the carbon fiber with a diameter of 5 pm.

4. A cooler (1) according to claim 1, characterized by the inner surface (6) in which glass fiber, cellulose fiber, bamboo fiber or the fiber forms of different materials are used.

5. A cooler (1) according to claim 1, characterized by the resin based binding agent (7)·

6. A cooler (1) according to claim 1, 5, characterized by the binding agent (7) comprising BMI, Cyanate, Epoxy, Phenolic, Polyester or chemicals of different formulas.

7. A cooler (1) according to any one of the preceding claims, characterized by the external wall (4) mounted on the door (3).

8. A cooler (1) according to any one of the preceding claims, characterized by the external wall (4) mounted on the body (2).

9. A method for producing external wall (1) suitable for use in a cooler according to any one of the preceding claims characterized by the steps of:

• cutting the outer and the inner surfaces (5 and 6) suitably, • joining the outer and the inner surfaces (5 and 6) so as to have a binding agent (7) in between and

• curing thereof,

• subjecting to a single mold process the inner and the outer surfaces (5 and 6) joined by means of the binding agent (7), and subsequently

• subjecting thereof to a multi-mold process.

10. A production method according to claim 9, comprising the step of curing the outer surface and the inner surface (5 and 6), and the binding agent (7) in a temperature range of l00°C to l80°C.

11. A production method according to claim 9, comprising the step of single molding process in which molding is performed by vacuuming in a pressure of almost 1 bar.

12. A production method according to claim 9, comprising the step of double molding process comprising subjection to press molding with pressures between 20, 40 or 80 bars.

Description:
AN EXTERNAL WALL SUITABLE LOR USE IN A COOLER BODY AND/OR DOOR, AND THE PRODUCTION METHOD THEREOF

The present invention relates to an external wall made of carbon fiber, used in a cooled body and/or door, and the production method thereof.

In coolers, insulation material is placed between the inner lining and the external wall forming the body and/or the door, with the purpose of providing heat insulation between the internal of the compartment and the outer environment. Preferably polyurethane material is used as the insulation material, and this material is filled through a gap between the inner lining and the external wall.

In addition, particularly in one door coolers, the external wall of the door is made of metal, and the inner lining is made of plastic material, and just like the body, insulation material is filled into the insulation volume between the inner lining and the outer wall by way of injection. The weight of the door which usually comprises metal sheet, reaches up to five kilograms. The external appearance of the door is obtained by brushed metal sheet, PET film coated metal sheet, various paint alternatives and similar applications.

State of the art Japanese patent application no. JP09303947 discloses applying solid epoxy layer and resin interlayer enabling homogeneous distribution of the insulation material, on the inner lining of the body contacting the insulation material.

State of the art German patent application no. DE 102011082874 discloses using carbon fiber material on ovens and coolers.

The aim of the present invention is to realize a cooler comprising a light-weight and durable external wall with high visual quality perception.

The cooler realized to achieve the aim of the present invention and disclosed in the first claim and the dependent claims, comprises an external wall forming the frontal surface of a door, having a carbon fiber based outer surface, fiber based inner surface and a binding agent provided between the inner surface and the outer surface.

The outer surface is carbon fiber, aramid or colored carbon fiber. In the preferred embodiment, the carbon fiber has a diameter of 5 pm.

Glass fiber, cellulose fiber, bamboo fiber or fiber forms of different materials are used for the inner surface. The inner surface is used in order to enhance the strength of the external wall. The binding agent used to fix to each other the inner surface and the outer surface is resin based. The binding agent comprises chemicals containing BMI, Cyanate, Epoxy, Phenolic, Polyester or various formulas.

In the preferred embodiment of the invention, the external wall is produced as follows: the outer surface comprising carbon fiber is prepared by being cut suitably. The fiber based inner surface is prepared by being cut in a sheet form, and the surfaces are cured so as to have a binding agent in between. After this step, the inner surface and the outer surface joined by means of the binding agent, are subjected to a single mold process and are subsequently subjected to multi-mold process. Then the external wall is arranged in accordance with the external appearance of the door, and the process is completed by sizing the wall.

The external wall thus produced is mounted on a door and/or a body. In the preferred embodiment of the invention, the external wall is particularly used on doors.

In the preferred embodiment, the inner and the outer surfaces and the binding agent are cured in a temperature range of l00°C to l80°C.

In the preferred embodiment of the invention, in the single mold process, the wall is molded by being vacuumed with a pressure of almost 1 bar.

In the preferred embodiment of the invention, in the double mold process, the wall is subjected to press molding with pressures between 20, 40 or 80 bars.

By means of the invention, the weight of particularly the cooler door is reduced by almost 60%. Low-cost hinges resistant to lesser weights can thus be used.

A strength similar to the strength of the sheet used in producing a door in the state of the art, is provided with a thinner thickness. Thus, a composite structure is obtained, with higher chemical corrosion and abrasion values than stainless steel or sheet pieces produced by a metallic press.

An external wall of high visual quality perception is obtained without subjecting the material to any painting, coating, cataphoresis, pressing and similar processes. By this, instead of stainless steel appearance, carbon fiber, aramid fiber, natural fibers such as bamboo fiber, or silver fiber can be applied on a cooler door so as to enhance the visual quality perception.

In addition, scratch resistance values (ISO 4586-2) are increased to the level of 2N.

The cooler realized to achieve the aims of the present invention is illustrated in the accompanying drawings, wherein: Figure 1 is a perspective view of a cooler.

Figure 2 is a sectional view of an external wall.

The elements in the figures are numbered individually and the correspondence of these numbers are given hereinafter.

1. Cooler

2. Body

3. Door

4. External wall

5. Outer surface

6. Inner surface

7. Binding agent

The cooler (1) comprises a body (2), a door (3) enabling access into the body (2), an internal wall forming the side of the cooler (1) facing its inner volume, and

• an external wall (4) provided on the side of the cooler (1) facing outside, having · a fiber based inner surface (6),

• a carbon fiber based outer surface (5) and a binding agent (7) enabling fixing the inner and the outer surfaces (5, 6) to each other (Figure 1 and Figure 2).

In the embodiment of the invention, the outer surface (5) is carbon fiber, aramid or colored carbon fiber. In the preferred embodiment, the carbon fiber has a diameter of 5 pm.

In an embodiment of the invention, glass fiber, cellulose fiber, bamboo fiber or fiber forms of different materials are used as the inner surface (6). The inner surface (6) enables enhancing the strength of the external wall (4).

In the embodiment of the invention, the binding agent (7) used to fix to each other the inner surface (6) and the outer surface (5) is resin based. The binding agent (7) comprises chemicals containing BMI, Cyanate, Epoxy, Phenolic, Polyester or various formulas.

In the preferred embodiment of the invention, the external wall (4) is produced as follows: the outer and the inner surfaces (5 and 6) are prepared by being cut suitably. They are joined so as to have a binding agent (7) in between, and cured. After this step, the inner surface and the outer surface (5 and 6) joined by means of the binding agent (7), are subjected to a single mold process and are subsequently subjected to multi-mold process. Then the external wall (4) is arranged in accordance with the desired external appearance, and the process is completed by sizing the wall (4).

The external wall (4) thus produced is mounted on the door (3) and/or the body (2). In the preferred embodiment of the invention, the external wall (4) is particularly used on the door

(3).

In the preferred embodiment, the inner and the outer surfaces (5 and 6) and the binding agent (7) are cured in a temperature range of l00°C to l80°C.

In the preferred embodiment of the invention, in the single mold process, the wall is molded by being vacuumed with a pressure of almost 1 bar.

In the preferred embodiment of the invention, in the double mold process, the wall is subjected to press molding with pressures between 20, 40 or 80 bars.

By means of the invention, particularly the weight of the cooler (1) door (3) is reduced by almost 60%. Low-cost hinges resistant to lesser weights can thus be used. In addition, a composite structure is obtained, with higher chemical corrosion and abrasion values than stainless steel or sheet pieces produced by a metallic press. Furthermore, an external wall (4) is obtained having a high visual quality perception without being subjected to any painting, coating, cataphoresis, pressing and similar processes.