KR101870509B1 - Refrigerator door and vent prevention sheet for refrigerator - Google Patents

Abstract

The present invention relates to a refrigerator door, a refrigerator bending prevention sheet and a method for manufacturing the refrigerator door, which is characterized in that the buffering performance of the polyurethane foam is maintained and the flowability of the foamed liquid is improved, do.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator door and a refrigerator,

The present invention relates to a refrigerator door and a refrigerator bending prevention sheet.

Generally, a refrigerator is a household appliance that allows low-temperature storage of food in an internal storage space that is shielded by a door. To this end, the refrigerator is configured to cool the inside of the storage space by using cool air generated through heat exchange with the refrigerant circulating in the refrigeration cycle, thereby storing the stored food in an optimum state.

Recently, refrigerator has been gradually becoming larger and more multifunctional according to changes of eating habits and product quality, and designs having various appearance designs according to user's taste are being released.

Particularly, in the case of a refrigerator door occupying most of the entire appearance in a state where a refrigerator is installed, it can be a most important factor of appearance design. In recent years, the outer appearance of a refrigerator door is formed of a metal material to form a more various appearance, It becomes possible to form an appearance.

In the case of a refrigerator having the appearance of such a metal material, a portion where the foaming liquid is unfilled may be generated when the foaming liquid is injected for forming the heat insulating material, and in this case, a difference in cross-sectional area of the heat insulating material formed by the foaming liquid And as a result, there is a problem that deformation such as bending of the front surface of the door may occur.

Particularly, such a problem can be more prominently displayed on the front surface of the refrigerator door, and when the refrigerator door is formed of a metal material, a small curvature can be conspicuous when the light is reflected.

Korean Patent Laid-Open No. 10-2010-0046525 discloses a refrigerator door having a foam heat shielding member for shielding foaming heat and preventing the surface of the door from being bent.

However, according to the related art, there is a possibility that the surface of the door may be bent due to the change in volume when the gas is discharged after the gas is discharged in the inflated state when the foamed liquid is injected and when the foamed liquid is injected.

Further, when the foaming liquid is injected, the heat insulating material may not be uniformly filled throughout the door, and there is a problem that the surface of the door may be bent due to the difference in thickness of the heat insulating material due to the unbalanced foaming.

When the foamed liquid is solidified to form a heat insulating material because of a weak bonding force between the foamed heat blocking member and the foamed liquid, a space may be formed between the foamed heat blocking member and the heat insulating material, there is a problem.

An object of the present invention is to provide a refrigerator door and a refrigerator bending prevention sheet which can be prevented from being bent by a polyurethane foam during inflation and contraction of a foamed liquid injected for molding a heat insulating material.

The present invention relates to a refrigerator door that allows a foamed liquid to be easily coupled with a surface of a bend prevention sheet when a foaming liquid is injected and maintains a coupled state, It is an object of the present invention to provide a refrigerator anti-bending sheet.

An object of the present invention is to provide a refrigerator door, a refrigerator bend prevention sheet, and a method for manufacturing a refrigerator door, which can maintain the cushioning performance of the polyurethane foam and enhance the bonding property of the foamed liquid, .

A refrigerator door according to an embodiment of the present invention includes: an out plate forming a front surface and formed of a metal material; A bending prevention sheet attached to a back surface of the out plate; A door liner coupled to the out plate and forming a back surface; And a heat insulating material formed by filling a foamed liquid of a polyurethane material in a space between the out plate and the door liner, wherein the anti-bending sheet is attached to a back surface of the out plate, A polyurethane foam for buffering the expansion and contraction of the foamed liquid; A barrier film formed of a vinyl material and adhered to a back surface of the polyurethane foam, the blocking film blocking direct contact of the foaming liquid with the polyurethane foam; And a polyurethane primer provided on the back surface of the barrier film, the polyurethane primer being formed of a polyurethane material and bonded to the foamed liquid.

The blocking film may be formed of a material of a material.

The anti-bending sheet can be attached to the entire back surface of the out plate.

The anti-bending sheet may be attached to a portion of the out plate corresponding to the front surface of the door.

The front surface of the out plate may be rounded.

The front surface of the polyurethane foam may be coated with a pressure-sensitive adhesive for attachment to the out-plate.

It is possible that the barrier film is adhered to the polyurethane foam in a state that the polyurethane primer is applied to the back surface.

A refrigerator anti-bending sheet according to an embodiment of the present invention includes: a polyurethane foam which is formed in an elastically deformable foam shape to buffer expansion and contraction of a foamed liquid injected for molding a heat insulating material of a refrigerator; A pressure sensitive adhesive applied on the entire surface of the polyurethane foam; A release paper which is adhered to the front surface of the polyurethane foam by the pressure-sensitive adhesive and is removed when the polyurethane foam is attached to one side of the refrigerator in which the heat insulating material is formed; An adhesive applied to the back surface of the polyurethane foam; A vinyl-based barrier film adhered to the back surface of the polyurethane foam by the adhesive and blocking the direct contact of the foaming liquid with the polyurethane foam; And a polyurethane primer coated on the back surface of the barrier film and formed of a polyurethane material and bonded to the foamed liquid.

The polyurethane foam can be formed to have a density of 16 kg / m ³ to 20 kg / m ³ .

The polyurethane foam may be formed to have a thickness of 1.5 mm to 2.5 mm.

The blocking film may be formed to a thickness of 12 to 25 mu m.

The polyurethane primer may be formed to a thickness of 1.5 탆 to 2.5 탆.

The blocking film may be formed of a material of a material.

The blocking film can be adhered to the polyurethane foam with the polyurethane primer applied to the back surface.

The anti-bending sheet can be attached to the back surface of the out plate of the metal material forming the front surface of the refrigerator door.

The anti-bending sheet is formed of a plastic material and can be attached to the front surface of the door liner forming the back surface of the refrigerator door.

The anti-bending sheet can be attached to the inner surface of the out plate of the metal material forming the outer surface of the cabinet forming the storage space of the refrigerator.

The anti-bending sheet can be attached to the inner surface of the inner case of the plastic material forming the inner surface of the cabinet forming the storage space of the refrigerator.

A method for manufacturing a refrigerator bend prevention sheet according to an embodiment of the present invention comprises: preparing a metal outer plate and a door liner and preparing the refrigerator bend prevention sheet of claim 7 by cutting; [0050] [50] A step of removing the release paper of the anti-bending sheet and attaching the release paper to the back surface of the out plate; [S200] assembling the door liner with the out-plate to which the anti-bending sheet is attached; [S300] Injecting the foamed liquid into the space between the outer plate and the door liner assembled, the expansion and contraction of the foamed liquid is buffered by the anti-flexion sheet; [S400] and completing the molding of the heat insulating material by solidifying the foamed liquid after the injection of the foamed liquid is completed; [S500].

In step S200, the anti-bending sheet may be flame laminated to improve adhesion of the adhesive after removing the release paper.

The following effects can be expected in the method for manufacturing the refrigerator door, the refrigerator bend prevention sheet, and the refrigerator door according to the embodiment of the present invention.

According to the embodiment of the present invention, even if a blocking film is disposed on the back surface of a polyurethane foam having a buffering action to inject a foaming liquid of a polyurethane material for molding a heat insulating material, the foaming liquid does not directly contact the polyurethane foam It is possible to prevent the polyurethane foam from being cured by the reaction. Therefore, when the foamed liquid expands and contracts by the injection of the foamed liquid, the polyurethane foam can maintain the buffering action.

In addition, the anti-bending sheet can be reinforced by the blocking film, so that the anti-bending sheet can be prevented from being damaged even in a roller work or a cutting operation for the lining, .

In addition, when the anti-bending sheet is attached to the out plate, damage to the anti-bending sheet does not occur even if the flame laminating operation is performed to improve the adhesive performance of the adhesive, so that the anti- There is an advantage that it can be attached.

A polyurethane primer containing polyurethane, which is the same material as the foaming liquid, is applied to the back surface of the blocking film so that the bonding between the foaming liquid and the heat insulating sheet can be maintained when the foaming liquid is injected do.

Therefore, since the foamed liquid is combined with the surface of the anti-bending sheet while being coupled along the anti-bending sheet, the gas is discharged after filling the foamed liquid, so that even when the foamed liquid is shrunk, Preventing a space from being formed between the anti-flexural sheet and the heat insulating material.

The surface of the anti-bending sheet is excellent in bonding property by the polyurethane primer, so that the foamed liquid can be evenly spread over the entire surface of the anti-bending sheet. Therefore, there is an advantage that the foamed liquid is filled evenly throughout the inside of the refrigerator door, and the thickness of the heat insulating material can be made uniform. When the thickness of the heat insulating material is uniform, bending or deformation of the front surface of the refrigerator door can be prevented, and the appearance of the refrigerator can be further improved.

1 is a perspective view of a refrigerator according to an embodiment of the present invention.
2 is an exploded perspective view of a refrigerator door according to an embodiment of the present invention.
3 is a sectional view taken along the line 3-3 'in Fig.
4 is a cross-sectional view of a bending prevention sheet according to an embodiment of the present invention.
FIG. 5 is a block diagram showing a process of manufacturing the door.
6 is a view showing a state change of the anti-bending sheet when the foaming liquid is injected into the refrigerator door.
7 is a cross-sectional view of a refrigerator door according to another embodiment of the present invention.
8 is a cross-sectional view of a refrigerator door according to another embodiment of the present invention.
9 is a sectional view of a refrigerator cabinet according to another embodiment of the present invention.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. However, it should be understood that the present invention is not limited to the embodiment shown in the drawings, and that other embodiments falling within the spirit and scope of the present invention may be easily devised by adding, .

That is, the embodiment of the present invention describes a bottom freeze-type refrigerator in which a freezing compartment is provided below a refrigerating compartment for the convenience of explanation and understanding. However, the present invention is characterized in that the refrigerator door is filled with a heat- It is noted that the present invention is applicable to all types of refrigerators in which at least a part of the appearance of the door is formed of a metal material.

1 is a perspective view of a refrigerator according to an embodiment of the present invention.

A refrigerator 300 according to an embodiment of the present invention includes a cabinet 310 for forming a storage space and a door 400 for opening and closing a storage space formed in the cabinet 310, .

The cabinet 310 is formed in a hexahedron shape having an open front, and the storage space inside the cabinet 310 can be partitioned vertically by a barrier. That is, a refrigerating chamber 311 may be formed on the upper portion of the cabinet 310, and a freezing chamber 312 may be formed on the lower portion of the cabinet 310.

The door 400 may include a refrigerating chamber door 321 for opening and closing the refrigerating chamber 311 and a freezing chamber door 322 for opening and closing the freezing chamber 312. The refrigerator compartment door 321 may be provided on both sides of the refrigerator compartment door 321 and may be rotatably mounted on both sides of the cabinet 310. Accordingly, the refrigerator compartment door 321 can selectively open and close the refrigerating compartment 12 by pivoting. The pair of refrigerating compartment doors 321 can be independently pivoted, so that the front surface of the refrigerating compartment 311 can be partly opened and closed.

The freezing chamber door 322 may have a structure such as a drawer capable of sliding in and out of the freezing chamber 312. Accordingly, the freezing chamber door 322 can open / close the freezing chamber 312 by sliding in / out.

The embodiment of the present invention can be applied regardless of the operation mode of the door such as the pivoting type or the drawer type. Hereinafter, a refrigerating chamber door 321 (hereinafter, referred to as a door 400) ) Will be described with reference to FIG.

2 is an exploded perspective view of a refrigerator door according to an embodiment of the present invention. 3 is a sectional view taken along the line 3-3 'in Fig.

As shown in the figure, the door 400 includes an out plate 410 forming the front surface of the door 400, a door liner 420 forming the outer surface of the rear surface of the door 400, And a cab deco 430 forming an upper surface and a lower surface of the door 400. Of course, at least one of the cab decor 430 may be omitted depending on the shape and structure of the door 400.

The out plate 410 may be formed of a metal material such as a stainless steel plate or a color steel plate. The outboard 410 may be formed by bending a plate-shaped metal material to form a part of the circumferential surface of the door 400. The outer plate 410 may have a surface processing such as a hair line on the front surface exposed to the outside to add texture. A coating for preventing fingerprints or diffuse reflection may be provided on the front surface of the out plate 410, and a film may be attached or printed to realize colors, patterns and patterns.

A portion of the out plate 410 corresponding to the front surface of the door 400 may be rounded so that the front surface of the door 400 may be curved.

The door liner 420 may be formed of a plastic material and may be coupled to the periphery of the out plate 410. The door liner 420 forms a rear surface of the door 400 and may form a door dike 421 for mounting the door basket. Can be integrally formed. A gasket 422 may be provided along the periphery of the door liner 420.

A space may be formed between the out plate 410 and the door liner 420 and a heat insulating material 430 may be formed in a space between the out plate 410 and the door liner 420. The heat insulating material 430 may be formed by a foamed liquid 431 injected in a state where the out plate 410 and the door liner 420 are coupled to each other. The foamed liquid 431 may be formed of polyurethane (PU).

The heat insulating material 430 completely fills the interior of the door 400, thereby preventing heat exchange between the inside of the door 400 and the outside air. It is also possible to prevent the door 400 from being deformed due to an external impact by being completely in close contact with the outboard plate 410 and the door liner 420.

On the other hand, the anti-bending sheet 500 may be attached to the back surface of the out plate 410. The bending prevention sheet 500 may be formed such that the foamed liquid 431 spreads evenly along the bending prevention sheet 500 when the foamed liquid 431 is injected so as to be filled inside the door 400 At the same time, the foamed liquid 431 is hardened and the expansion and contraction of the foamed liquid 431 can be buffered in the process of forming the heat insulating material 430.

The anti-bending sheet 500 may be attached to the entire rear surface of the out plate 410 and may be attached to at least a front area of the door 400 of the out plate 410. Therefore, when the foamed liquid 431 is injected, the foamed liquid 431 comes into contact with the anti-bending sheet 500 and prevents deformation of the outer plate 410 including the front surface of the door 400. [ .

Hereinafter, the structure of the anti-bending sheet 500 will be described in more detail with reference to the drawings.

4 is a cross-sectional view of a bending prevention sheet according to an embodiment of the present invention.

As shown in the figure, the anti-bending sheet 500 may include a polyurethane foam (PU foam) 510, a barrier film (PET film) 550, and a polyurethane primer 560. The adhesive 540 and the adhesive 520 may be provided on the upper and lower surfaces of the polyurethane foam 510 and the release paper 530 may be provided on the lower surface of the adhesive 520.

Specifically, the polyurethane foam 510 may be formed to have a density of 16 kg / m ³ to 20 kg / m ³ . The polyurethane foam 510 is configured to effectively buffer the expansion and contraction of the foamed liquid. That is, when the density of the polyurethane foam 510 is 16 kg / m ³ to 20 kg / m ³ , when the foamed liquid 431 is inflated by the injection of the foamed liquid 431 and when the foamed liquid 431 It is possible to perform an effective buffering action when the foamed liquid 431 is shrunk and the gas is exhausted after the injection.

The polyurethane foam 510 may be formed to a thickness of about 1.5 mm to 2.5 mm and when the foamed liquid 431 for molding the heat insulating material 430 is injected into the door 400 , And shrinks after expansion of the foamed liquid 431 is buffered.

That is, when the foamed liquid 431 expands, the polyurethane foam 510 is compressed. When the foamed liquid 431 is hardened and contracted, the polyurethane foam 510 can be restored. Therefore, the volume change due to the injection of the foamed liquid 431 can be buffered by the polyurethane foam 510.

Also, when the foamed liquid 431 is injected in one direction, the pressure at a portion adjacent to the injection port becomes high, and at this time, the polyurethane foam 510 can be compressed. When the injection of the foamed liquid 431 is completed and the foamed liquid is filled evenly throughout the door 400 and the pressure is lowered, the polyurethane foam 510 can be restored in a compressed state. Therefore, the local pressure increase due to the injection of the foamed liquid 431 can be buffered.

When the polyurethane foam 510 has a thickness of 1.5 mm or less, the foamed liquid 431 can not provide a buffering effect during the expansion and contraction of the foamed liquid 431. When the foamed polyurethane foam 510 is formed to a thickness of 2.5 mm or more, (410) is not sufficiently adhered. Preferably, the polyurethane foam 510 may have a thickness of 2 mm.

A pressure sensitive adhesive 520 may be applied to the lower surface of the polyurethane foam 510. The pressure sensitive adhesive 520 is applied to the entire lower surface of the polyurethane foam 510 for adhesion to the release paper 530 and adhesion to the back surface of the out plate 410.

The release paper 530 may be formed of a kraft paper that can be used as the release paper 530. The polyethylene paper and the release paper 530 may be treated with polyethylene (PE) The pressure sensitive adhesive may be easily separated and removed from the pressure sensitive adhesive 520.

The upper surface of the polyurethane foam 510 may be coated with an adhesive 540. The adhesive 540 is used to adhere the barrier film 550 to the polyurethane foam 510 and may be applied to the entire upper surface of the polyurethane foam 510.

The blocking film 550 may be adhered to the upper surface of the polyurethane foam 510 by the adhesive 540. The blocking film 550 may be formed of the vinyl material. The blocking film 550 may be formed of a material of a polyethylene terephthalate foam 510 so as to prevent direct contact between the foamed liquid 431 and the polyurethane foam 510, It may be formed of other vinyl material which does not hinder the buffering action.

The blocking film 550 may prevent the foamed liquid 431 from directly reacting with the polyurethane foam 510 when the foamed liquid 431 is filled in the door 400. That is, the foamed liquid 431 and the polyurethane foam 510 (not shown) are mixed so that the foamed liquid 431 of the same polyurethane material and the polyurethane foam 510 of the anti- As shown in FIG.

In addition, the barrier film 550 is not damaged during the process for attaching the barrier film 550 to other layers due to the nature of the material, the process of being wound in a roll state, and the process of heating by flame lami. In addition, the anti-bending sheet 500 may have a function of reinforcing the overall strength.

Meanwhile, the blocking film 550 may be formed to have a thickness of 12 탆 to 25 탆. If the thickness of the barrier film 550 is less than 12 μm, the barrier film 550 can not satisfy the required strength, and there is a possibility that the barrier film 550 may be damaged during the manufacture and attachment of the anti-bending sheet 500. If the barrier film 550 has a thickness of 25 占 퐉 or more, the buffering action of the polyurethane foam 510 may be inhibited. Therefore, it is preferable that the blocking film 550 is formed to a thickness of about 12 탆 to 25 탆.

The polyurethane primer 560 may be applied to the upper surface of the blocking film 550. The polyurethane primer 560 may be formed of the same polyurethane material as the foamed liquid 431 to allow the foamed liquid injected into the door 400 to spread out evenly.

That is, the polyurethane primer 560 including the same material as the foamed liquid 431 is formed on the uppermost surface of the anti-bending sheet 500. When the foamed liquid 431 is injected, the foamed liquid 431 can be easily coupled with the polyurethane primer 560.

Therefore, when the foamed liquid 431 is injected, the foamed liquid 431 is combined with the polyurethane primer 560, the gas is exhausted after the foamed liquid 431 is injected, the foamed liquid 431 is hardened, The bending prevention sheet 500 and the heat insulating material 430 may be separated from each other or a space may be formed between the bending prevention sheet 500 and the heat insulating material 430 by maintaining the joined state in the process of forming the heat insulating material 430 .

In addition, when the foamed liquid 431 is injected, the foamed liquid 431 can be coupled along the entire surface of the anti-bending sheet 500 due to its excellent bonding force with the polyurethane primer 560, The liquid 431 spreads evenly throughout the anti-bending sheet 500. Accordingly, when the foamed liquid 431 is injected into the door 400, the foamed liquid 431 may be uniformly spread over the entire rear surface of the door 400.

The polyurethane primer 560 may be formed to have a thickness of about 1.8 to 2.2 mu m. If the thickness of the polyurethane primer 560 is 1.8 μm or less, the bonding strength with the foamed liquid 431 may be lowered. If the thickness of the polyurethane primer 560 is 2.2 μm or more The buffering action of the polyurethane foam 510 can be inhibited.

The polyurethane primer 560 may be applied to the barrier film 550 in a state of being adhered to the polyurethane foam 510 and may be applied to the barrier film 550 in a state where the polyurethane primer 560 is applied, (550) may be adhered to the upper surface of the polyurethane foam (510).

Hereinafter, a process of manufacturing the door will be described.

FIG. 5 is a block diagram showing a process of manufacturing the door. 6 is a view showing a state change of the anti-bending sheet when the foamed liquid is injected into the refrigerator door.

As shown in the drawing, the outer plate 410, the door liner 420, and the cap decor 430 are prepared in order to mold the door 400. [S100]

The bend prevention sheet 500 is cut to a size corresponding to the size of the out plate 410 and the release sheet 530 adhered to the bending prevention sheet 500 is removed. After the release paper 530 is removed, the pressure sensitive adhesive 520 is heated through a flame laminating process so that the pressure sensitive adhesive 520 can be easily attached to the out plate 410.

In this state, the anti-bending sheet 500, from which the release paper 530 is removed, is attached to the back surface of the out plate 410. The bend prevention sheet 500 may be attached to the back surface of the out plate 410 or the back surface of the out plate 410 corresponding to at least the front surface of the door 400 by the adhesive 520. The polyurethane primer 560 faces the door liner 420 in a state where the anti-bending sheet 500 is attached. [S200]

The outer plate 410 with the anti-bending sheet 500 attached thereto is assembled with the door liner 420 and the cap decor 430 to form an overall shape. [S300]

The foamed liquid is injected into the door 400 in a state where the assembly of the door 400 is completed. The foamed liquid 431 may be injected through the foam decontamination hole formed in the cap decor 430 or the door liner 420.

The high-temperature foamed liquid 431 is injected into the door 400 and comes into contact with the polyurethane primer 560 of the anti-bending sheet 500. The polyurethane primer 560 may be combined with the foamed liquid 431 of the same kind and the foamed liquid 431 is evenly spread along the back surface of the anti-flexure sheet 500.

8 (a), the foamed liquid 431 is foamed and expanded to press the bending prevention sheet 500 contacting the foamed liquid 431. At this time, as shown in FIG. Therefore, the polyurethane foam 510 of the anti-bending sheet 500 can be compressed by the pressure of the foamed liquid 431, and the thickness D ₁ thereof becomes thin.

When the foamed liquid 431 is injected for a certain period of time, the gas at the time of foaming is exhausted and the foamed liquid 431 is stabilized while being cooled to be hardened to form the heat insulating material 430. At this time, as shown in FIG. 8 (b), the foamed liquid 431 is relatively contracted, so that the pressure for pressing the bending prevention sheet 500 can be reduced or eliminated. Accordingly, the polyurethane foam 510 of the anti-bending sheet 500 is restored due to the pressure drop or the drop of the foamed liquid 431, so that the thickness D ₂ becomes relatively thick or restored to the original thickness .

In the initial stage of the injection of the foamed liquid 431, the polyurethane foam 510 is compressed and after the set time has elapsed, the polyurethane foam 510 is restored, . [S400]

After the filling of the foamed liquid 431 is completed, the foamed liquid 431 is completely hardened to form the heat insulating material 430. At this time, the heat insulating material 430 has a uniform thickness on the entire surface of the anti-bending sheet 500 and can be filled in the entire interior of the door 400. [S500]

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments.

The same reference numerals are used for the same components as those of the above-described embodiments, and a detailed description thereof will be omitted.

7 is a cross-sectional view of a refrigerator door according to another embodiment of the present invention.

As shown, the refrigerator door 400 according to another embodiment of the present invention is formed by the out plate 410 made of a metal material and the door liner 420 made of a plastic material. The foamed liquid 431 is filled between the out plate 410 and the door liner 420 to form the heat insulating material 430.

On the other hand, the bending prevention sheet 500 may be attached to the back surface of the out plate 410. The anti-bending sheet 500 may be attached to the entire rear surface of the out plate 410. Therefore, it is possible to prevent the bending generated when the foamed liquid 431 is injected from the entire surface of the out plate 410. [

8 is a cross-sectional view of a refrigerator door according to another embodiment of the present invention.

As shown in the drawing, the refrigerator door 400 according to another embodiment of the present invention is formed by the out plate 410 made of a metal material and the door liner 420 made of a plastic material. The foamed liquid 431 is filled between the out plate 410 and the door liner 420 to form the heat insulating material 430.

On the other hand, the bending prevention sheet 500 may be attached to the back surface of the out plate 410. The bending prevention sheet 500 may be attached not only to the back surface of the out plate 410 but also to the inner surface of the door liner 420, that is, the surface contacting the foamed liquid 431. Therefore, it is possible to prevent bending occurring when the foamed liquid 431 is injected from the outer side of the outboard plate 410 as well as the door liner 420 side.

9 is a sectional view of a refrigerator cabinet according to another embodiment of the present invention.

As shown in the figure, a cabinet 310 of a refrigerator according to another embodiment of the present invention includes an outer case 314 made of a metal material such as steel, an inner case formed of a plastic material forming a high- 315). The outer case 314 and the inner case 315 may be formed with a heat insulating material 316 molded by injecting the foamed liquid.

The bending prevention sheet 500 may be attached to the inner surface of the outer case 314. Therefore, the out plate 410 can prevent bending occurring when the foamed liquid is injected.

Of course, if necessary, the anti-bending sheet 500 may be attached to the inner case 315 as well.

Claims (20)

An outer plate forming a front surface and formed of a metal material;
A bending prevention sheet attached to a back surface of the out plate;
A door liner coupled to the out plate and forming a back surface; And
And a heat insulating material formed by filling a foamed liquid of polyurethane material in a space between the out plate and the door liner,
The anti-
A polyurethane foam which is attached to the back surface of the out plate and is formed into a resiliently deformable foam to buffer the expansion and contraction of the foamed liquid;
A barrier film formed of a vinyl material and adhered to a back surface of the polyurethane foam, the blocking film blocking direct contact of the foaming liquid with the polyurethane foam; And
And a polyurethane primer provided on the back surface of the barrier film and in direct contact with the foaming liquid upon filling of the foaming liquid,
Wherein the polyurethane primer is formed of the same polyurethane material as the foamed liquid so that the bonding with the foamed liquid can be maintained.
The method according to claim 1,
Wherein the barrier film is formed of a material of a material.
The method according to claim 1,
Wherein the bend prevention sheet is attached to the entire rear surface of the out plate.
The method according to claim 1,
Wherein the bend prevention sheet is attached to a portion of the out plate corresponding to the front surface of the door.
The method according to claim 1,
Wherein a front surface of the out plate is rounded.
The method according to claim 1,
Wherein the front surface of the polyurethane foam is coated with an adhesive to attach to the out plate.
The method according to claim 1,
Wherein the barrier film is adhered to the polyurethane foam in a state that the polyurethane primer is applied to the back surface.
A polyurethane foam which is formed in an elastically deformable foam form to buffer expansion and contraction of a foamed liquid of a polyurethane material injected for molding a heat insulating material of the refrigerator;
A pressure sensitive adhesive applied on the entire surface of the polyurethane foam;
A release paper which is adhered to the front surface of the polyurethane foam by the pressure-sensitive adhesive and is removed when the polyurethane foam is attached to one side of the refrigerator in which the heat insulating material is formed;
An adhesive applied to the back surface of the polyurethane foam;
A vinyl-based barrier film adhered to the back surface of the polyurethane foam by the adhesive and blocking the direct contact of the foaming liquid with the polyurethane foam; And
And a polyurethane primer provided on the back surface of the barrier film and in direct contact with the foaming liquid upon filling of the foaming liquid,
Wherein the polyurethane primer is formed of the same polyurethane material as the foamed liquid so that the bonding with the foamed liquid can be maintained.
9. The method of claim 8,
Wherein the polyurethane foam is formed to have a density of 16 kg / m ³ to 20 kg / m ³ .
10. The method of claim 9,
Wherein the polyurethane foam is formed to a thickness of 1.5 mm to 2.5 mm.
9. The method of claim 8,
Wherein the barrier film is formed to a thickness of 12 to 25 占 퐉.
9. The method of claim 8,
Wherein the polyurethane primer is formed to a thickness of 1.5 탆 to 2.5 탆.
9. The method of claim 8,
Wherein the barrier film is formed of a sheet material.
9. The method of claim 8,
Wherein the barrier film is adhered to the polyurethane foam in a state that the polyurethane primer is applied to the back surface.
9. The method of claim 8,
Wherein the anti-bending sheet is attached to a rear surface of a metal material out plate forming the front surface of the refrigerator door.
9. The method of claim 8,
Wherein the bend prevention sheet is formed of a plastic material and is attached to a front surface of a door liner forming the back surface of the refrigerator door.
9. The method of claim 8,
Wherein the bend prevention sheet is attached to an inner surface of an out plate of a metal material forming an outer surface of a cabinet forming a storage space of the refrigerator.
9. The method of claim 8,
Wherein the anti-bending sheet is attached to the inner surface of the inner case of the plastic material forming the inner surface of the cabinet forming the storage space of the refrigerator.
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