KR20130057606A - Manufacturing mold for decorative out pannel of refrigerator - Google Patents

Abstract

PURPOSE: A mold for forming an exterior member of a refrigerator is provided to vary the exterior of the refrigerator by forming the exterior member in various shapes. CONSTITUTION: A mold for forming an exterior member of a refrigerator comprises an upper mold(210), a lower mold(220), a gasket(230), a forming unit(221), and a temperature control device. The gasket is interposed between the upper mold and the lower mold and forms a space in which the exterior member(100) is formed by injecting an acryl monomer. The forming unit forms the exterior member in a three-dimensional shape. The temperature control device controls the temperature of the mold by circulating a heat delivery medium such as water or oil inside the mold(200).

Description

 Mold for molding exterior member of refrigerator {manufacturing mold for decorative out pannel of refrigerator}

This embodiment relates to an outer mold forming mold of a refrigerator.

Generally, a refrigerator is a device which keeps food in a low temperature state.

The refrigerator includes a main body in which a storage compartment is formed, and a door movably connected to the main body to open and close the storage compartment.

For example, the storage compartment may be divided into a refrigerator compartment and a freezer compartment. The door may include a refrigerator compartment door for opening and closing the refrigerator compartment and a freezer compartment door for opening and closing the freezer compartment. Therefore, the user must open the freezer compartment door or the freezer compartment door in order to take out the food stored in the refrigerator compartment or the freezer compartment.

In addition, such a refrigerator may be formed in whole or in part by the refrigerator door. Recently, a refrigerator including the refrigerator door and the exterior member having various textures and shapes is applied to the main body of the refrigerator.

For example, a refrigerator having an exterior member having a metal texture on the front surface of the refrigerator, an exterior member having various patterns printed thereon, or a refrigerator having a front surface of the refrigerator made of tempered glass or transparent plastic material has been developed. .

In particular, in recent years, the front of the refrigerator door or a portion of the refrigerator main body is provided with a plate-shaped exterior member is configured to form the exterior of the refrigerator, it is disclosed in Republic of Korea Patent Publication No. 10-2007-0032146.

The exterior member of the refrigerator is formed in a plate shape, and the exterior member of the plate may be manufactured by a casting method using a glass plate as a mold. Hereinafter, a method of manufacturing an exterior member of a refrigerator door manufactured by a casting method will be described.

1 is a perspective view showing the shape of a mold for manufacturing a refrigerator exterior member according to the prior art.

Referring to FIG. 1, the plate-like exterior member 1 according to the related art for forming an exterior of a refrigerator door or a refrigerator main body may be manufactured by a casting method.

The mold 10 for forming the exterior member 1 is formed by the upper mold 11 and the lower mold 12, and a gasket between the upper mold 11 and the lower mold 12. 13) is provided. In addition, an acrylic monomer, which is a material for forming the exterior member 1, may be injected into the mold 10.

The upper mold 11 and the lower mold 12 are formed of a glass material. This is because the surface of the exterior member 1 to be molded should be formed smoothly, such as the glass surface, so that the surface of the upper mold 11 and the lower mold 12 also have a smooth shape, such as a mirror surface.

On the other hand, the gasket 13 may be provided around the lower mold 12. The gasket 13 may be formed of a soft PVC material, and may have a shape corresponding to that of the exterior member 1. That is, when the upper mold 11 and the lower mold 12 are fastened, the acrylic monomeers are injected into the space formed by the gasket 13, and the space formed by the gasket 13 is formed. The exterior member 1 may be formed according to a shape.

Therefore, the gasket 13 should always maintain a fixed position. For this purpose, a fixing member 20 for fixing the gasket 13 is provided. The fixing member 20 has a shape such as a forceps or a clamper, and is configured to press and fix the lower mold 12 and the gasket 13.

On the other hand, the upper mold 11 is formed to have a size and shape corresponding to the lower mold 12, the lower surface of the upper mold 11 is formed in a planar shape, the upper mold 11 and the lower The lower surface of the upper mold 11 is configured to contact the gasket 13 when the mold 12 is coupled.

Therefore, the upper mold 11 and the lower mold 12 are fastened to each other, and an acrylic monomer is injected into the space formed by the gasket 13, and then the combined mold 10 is polymerized by hot water and steam. By generating a reaction to form the exterior member (1).

However, such a prior art has the following problems.

In the shaping of the exterior member 1 formed in a plate shape, in the prior art, since the mold is formed of a glass material, the exterior member 1 of a general flat plate having a smooth surface was very easy, but the mold 10 of the glass material 10 ) Has only a smooth flat surface shape, there is a problem that can not be formed when a three-dimensional pattern or shape is formed on the surface of the exterior member (1).

Then, the mold 10 itself into which the acrylic monomer and the polymerization initiator, which are the raw materials, are injected for the polymerization reaction during the molding of the exterior member 1 by the conventional mold 10 is immersed in a hot water bath.

Therefore, for the polymerization reaction, the temperature of the hot water tank is raised to the starting temperature, and the process of cooling again must be repeated. For this purpose, a hot water tank having a size that can accommodate the entire mold 10 should be prepared. The temperature control requires a lot of fuel costs and a long cycle time.

As the cycle time becomes longer as described above, a problem arises in that the productivity of the exterior member 1 decreases.

An object of the present embodiment, a gasket is provided between the upper and lower molds formed of a metal material, the acrylic monomer is injected into the molding space of the exterior member formed by the gasket, and to control the temperature of the mold in the mold It is to provide an external member molding mold of a refrigerator provided with a temperature control device for.

In the mold for molding the exterior member of the refrigerator according to the present embodiment, an acrylic monomer material is injected to form a plate-shaped refrigerator exterior member. The upper mold and the lower mold are formed of metal materials and are sequentially stacked and bonded to each other. Mold; A gasket interposed between the upper mold and the lower mold, and forming a space in which the acrylic monomer is injected to form the exterior member; A molding part formed by the cutting process on the upper mold or the lower mold corresponding to the inside of the space, for molding a three-dimensional shape of the exterior member; It characterized in that it comprises a temperature control device for controlling the temperature of the mold by allowing the heat transfer medium such as water or oil is injected into the mold and circulated.

The upper mold and the lower mold is characterized in that formed of an aluminum material.

The temperature control device is characterized in that formed by a plurality of passages penetrating the mold in the horizontal direction.

The temperature control device is characterized in that the inlet and the outlet is formed on the outside of the mold, the inner side of the mold is formed by a flow path that is bent a plurality of times at regular intervals.

The mold may be in communication with a space in which the exterior member is molded to form an injection hole into which an acrylic monomer material and a polymerization initiator are injected.

The mold is further characterized in that the vent hole for the discharge of air generated during molding of the exterior member.

According to the proposed embodiment, the mold for molding the exterior member is formed of a metal material rather than a glass material, so that a molded part capable of forming a three-dimensional shape can be processed into the mold.

Accordingly, the exterior member of the refrigerator having a hairline process or a three-dimensional pattern or the like can be molded by a casting method. Therefore, there is an advantage that the molding of the exterior member having a three-dimensional pattern or pattern in a simple process without unnecessary post processing is possible.

And, by being able to mold the outer member having a variety of shapes there is an advantage that can be molded by the outer member that could not be molded in the existing casting method to make the appearance of the refrigerator more various to satisfy the consumer's preferences.

And, by being provided with a temperature control device that can control the temperature in the mold it is possible to control the polymerization reaction without using a water tank facility it is possible to reduce the overall equipment cost.

In addition, the temperature control device can be provided inside by the processing of the mold, to have a simple structure using a cooling medium such as water or oil to expect the effect of reducing the installation cost and production cost. Can be.

In addition, it is possible to control the rapid and active temperature according to the polymerization reaction can reduce the cycle time for the production of the exterior member, thereby improving the productivity of the exterior member may be expected.

1 is a perspective view showing the shape of a mold for manufacturing a refrigerator exterior member according to the prior art.
Figure 2 is a perspective view showing the shape of a mold for manufacturing a refrigerator exterior member according to an embodiment of the present invention.
3 is an exploded perspective view of the mold.
4 is an exploded perspective view of a mold for manufacturing a refrigerator exterior member according to another embodiment of the present invention.
5 is a cross-sectional view of the mold.
6 is a view sequentially illustrating a molding process of the mold and a molding process of the exterior member.

Hereinafter, embodiments will be described in detail with reference to the drawings.

Figure 2 is a perspective view showing the shape of a mold for manufacturing a refrigerator exterior member according to an embodiment of the present invention. 3 is an exploded perspective view of the mold. 4 is an exploded perspective view of a mold for manufacturing a refrigerator exterior member according to another embodiment of the present invention. 5 is a cross-sectional view of the mold. FIG. 5 is a cross-sectional view taken along line 5-5 'of FIG. 2.

2 to 5, the exterior member 100 formed by the mold 200 according to the present exemplary embodiment may be formed in a plate shape to form an exterior of a door or a main body of a refrigerator. In addition, the exterior member 100 may be formed of a plastic material such as acrylic, and at least a part of the surface exposed to the outside has a smooth shape. In addition, the exterior member 100 may be formed to be transparent or translucent as necessary, and may be formed to have various colors and patterns by direct printing or attachment of a printing film.

The exterior member 100 may be formed with a pattern such as irregularities on the surface to have a variety of textures, and if necessary, a pattern for three-dimensionally forming a specific shape may be formed. The exterior member 100 having such a three-dimensional pattern may be molded by a casting method of injecting a material into the molded mold 200.

In detail, the mold 200 is for molding the exterior member 100, and may include an upper mold 210 and a lower mold 220. The mold 200 may be formed of a metal material of a nonferrous material such as aluminum. Therefore, even when the mold 200 undergoes a curing process in water during the polymerization reaction for forming the exterior member 100, the mold 200 may not be rusted or corroded. Such a mold 200 may be formed of an aluminum material to prevent corrosion as well as easy processing and easy handling.

The upper mold 210 is located at the top of the mold 200, and the lower mold 220 is located at the bottom of the mold 200. The upper mold 210 and the lower mold 220 are coupled in a stacked form, and are interposed between the upper mold 210 and the lower mold 220 when the upper mold 210 and the lower mold 220 are coupled to each other. A space in which the exterior member 100 is molded may be formed by the gasket 230. Therefore, an acrylic monomer material is injected into the space formed inside the mold 200, and molding of the exterior member 100 is possible through a polymerization reaction.

In addition, a molding part 221 for forming a three-dimensional shape of the exterior member 100 may be formed in the space between the upper mold 210 and the lower mold 220. In the exemplary embodiment of the present invention, the exterior member 100 is formed in a plate shape, and for example, a three-dimensional pattern is formed on the front surface thereof. Thus, the molding part 221 is formed only on the upper surface of the lower mold 220. Is formed, and a lower surface of the upper mold 210 is formed to have a planar shape.

The molding part 221 is for molding a three-dimensional pattern formed on the exterior member 100, the mold 200 of the metal material to be molded by the NC processing for the molding of the molding part 221. Can be. That is, the molding unit 221 may be molded in an intaglio or embossed shape to be molded through a machining using a shelf or the like.

On the other hand, except for the portion in which the forming portion 221 is formed, the remaining portion may be formed in a plane. And. After molding the molding part 221, the surface into which the acrylic monomer is injected is molded for shaping the exterior member 100. Therefore, the upper surface of the lower mold 220 in which the exterior member 100 including the molding unit 221 is molded may be formed to have a smooth surface.

In addition, an upper surface of the lower mold 220 including the molding part 221 may be deposited and plated. By the deposition and plating process, the corresponding surfaces of the upper mold 210 and the lower mold 220 may have excellent surface glossiness and higher surface hardness of the mold.

Thus, not only the durability of the mold 200 itself is improved, but also the demolding of the molded exterior member 100 is facilitated. In addition, the surface of the exterior member 100 to be molded may be smoothly molded and the surface gloss may be excellently molded.

The lower surface of the upper mold 210 corresponding to the upper surface of the lower mold 220 may also be configured to be plated or deposited after finishing processing to form a smooth surface.

Of course, when only one side of the exterior member 100 forms a smooth surface as necessary, finishing processing and plating deposition are performed only on the upper surface of the lower mold 220, and separately on the lower surface of the upper mold 210. May not be processed.

Meanwhile, a gasket 230 may be mounted on the outer side of the molding part 221. The gasket 230 is formed of a soft fibrous (PVC) material, and the lower mold 220 and the upper mold are laminated so as to be pressed when they are bonded to each other so as to be compressed.

The gasket 230 is to prevent leakage of a material filled in the mold 200, that is, an acrylic monomer, and is formed to have a predetermined height so that the exterior member 100 is formed in the mold 200. Is configured to form a space for molding.

The gasket 230 may be formed along the circumference of the lower mold 220 and form a shape corresponding to the shape of the exterior member 100 to be molded. Thus, the gasket 230 may be disposed outside the molding unit 221.

The gasket 230 may be formed on a surface on which the molding part 221 is formed, and is disposed around the molding part 221. This is to allow the gasket slot for fixing the gasket 230 to be molded together during the molding of the molding part 221.

On the other hand, the lower mold 220 may be provided with a temperature control device. The temperature control device is for controlling the temperature of the mold 200 for the polymerization reaction of the acrylic monomer material, it may be composed of a flow path 222 penetrating the lower mold 220.

In detail, the flow path 222 may be formed to penetrate from the left side to the right side of the lower mold 220, and a plurality of the flow paths 222 may be continuously formed at predetermined intervals. The flow path 222 may be disposed over the entire lower mold 220, and a tube 223 is connected to an end of the flow path 222 to transfer heat such as water or oil through the flow path 222. The medium may be configured to circulate continuously.

On the other hand, the flow path may be configured to open in the side of the lower mold 220, as shown in Figure 4, bent repeatedly by a predetermined interval over the entire lower mold 220. Therefore, when a heat transfer medium such as water or oil is injected into the opened side of the flow path, the heat transfer medium such as water or oil may be discharged to the other side of the lower mold 220 through the entire surface of the lower mold 220. As such, the temperature of the lower mold 220 may be controlled by continuously circulating the heat transfer medium into the passage 224.

The temperature control device may be formed by inserting the tube 225 into the inside of the flow path 224, it may be configured to flow the heat transfer medium through the tube 225. In addition, although the shape or structure of the flow path 224 may be different, the heat transfer medium may be introduced into the lower mold 220 to have a structure capable of heating and cooling the lower mold 220. do.

Meanwhile, an injection hole and a vent hole 212 may be further formed in the upper mold 210. The injection hole is opened on the upper surface of the upper mold 210, and forms a passage through which the acrylic monomer can be injected. The injection hole 211 is opened downward through the upper mold 210 and may be configured to communicate with a space in which the exterior member 100 is formed.

The vent hole 212 is formed on an upper surface of the upper mold 210 spaced apart from the injection hole 211, and communicates with a space in which the exterior member 100 is formed to be generated during the injection or polymerization of the acrylic monomer. It is formed to exhaust air.

Hereinafter, a method of molding the exterior member 100 using the mold 200 having such a structure will be described in detail.

6 is a view sequentially illustrating a molding process of the mold and a molding process of the exterior member.

First, a material made of a metal such as aluminum is molded into a size corresponding to the size of the upper mold 210 or the lower mold 220.

In addition, the flow path 222 is formed in the lower mold 220. The lower mold 220 may be molded by molding to form the flow path 222, and the lower mold 220 may be separated up and down as needed, and the flow path 222 may be formed by cutting. Afterwards, the lower mold 220 may be combined to form an overall shape. Then, the tube 223 is inserted or connected to the flow path 222 so that water or a heat transfer medium may flow.

In this state, a cutting process for forming the molding part 221 is performed on the upper surface of the lower mold 220. At this time, the gasket slot is molded at once through cutting.

That is, during the cutting process, the entire upper surface of the lower mold 220 is processed, thereby enabling simultaneous molding of the molding part 221 and the gasket slot.

After the molding part 221 and the gasket slot are formed on the upper surface of the lower mold 220, the surface is polished through finishing processing on the upper surface of the lower mold 220, and the lower mold 220 is formed by plating deposition. The upper surface of) should be formed smoothly like a mirror surface.

After the surface treatment of the upper surface of the lower mold 220 is completed, the gasket 230 is inserted into the gasket slot. The gasket 230 inserted along the gasket slot may be mounted to protrude slightly from the upper surface of the lower mold 220. In addition, the gasket 230 is formed in a closed loop shape to form a space therein when the gasket 230 is completely mounted.

In addition, the lower surface of the upper mold 210 may also be smoothly formed like a mirror surface through the finishing process, plating or deposition process similarly to the lower mold 220. Therefore, the interior of the space in which the acrylic monomer is injected and the exterior member 100 is formed may have a smooth surface, the entire surface of the exterior member 100 may have a smooth surface, the exterior member 100 Demoulding can also be done easily.

Meanwhile, after the lower mold 220 and the upper mold 210 are formed of aluminum, the gasket 230 is disposed on the lower mold 220. In this case, the gasket 230 may be disposed to have a shape corresponding to that of the exterior member 100.

When the lower mold 220 and the upper mold 210 are coupled in a state where the gasket 230 is disposed, the gasket 230 may be compressed, and the lower mold 220 and the upper mold 210 may be compressed. A space formed by the gasket 230 interposed therebetween is formed. This space becomes a space for molding the exterior member 100.

In this way, the heat transfer medium such as water or oil for heating is injected through the tube 223 and the flow path 222 while the molding of the exterior member 100 is prepared. The heat transfer medium injected into the lower mold 220 is circulated along the lower mold 220 to heat the lower mold 220, and the lower mold 220 becomes an initiation temperature for the polymerization reaction. To help.

When the temperature of the mold 200 reaches approximately 60 to 80 ° C. in a state in which the lower mold 220 and the upper mold 210 are coupled to each other, the injection hole 211 is formed in the upper mold 210. An acrylic monomer serving as a material is injected into the internal space of the mold 200. In this case, the acrylic monomer may be injected together with the polymerization initiator, and a predetermined amount may be injected to fill the space inside the mold 200.

After the acrylic monomer and the polymerization initiator are injected into the mold 200, a polymerization reaction occurs and heat is generated by the polymerization reaction. Therefore, when the set time (approximately 90 minutes) passes for the continuous polymerization reaction, a heat transfer medium such as water or oil capable of cooling the mold 200 through the flow path 222 and the tube 223 is provided. Will be injected.

Through the injection of the heat transfer medium, the mold 200 may be rapidly cooled, and the polymerization cycle time may be controlled by controlling the content of the polymerization initiator or the crosslinking agent through the cooling of the mold 200.

On the other hand, the acrylic monomer and the polymerization initiator injected into the mold 200 is cured by a polymerization reaction to complete the molding of the exterior member 100 product.

After the completion of the polymerization reaction, the cooling of the mold 200 is terminated, and the upper mold 210 and the lower mold 220 are separated, and then the molded exterior member 100 is demolded. Since the surface of the upper mold 210 and the lower mold 220 are smoothly formed, the exterior member may be easily separated from the mold 200, and may be automatically demoulded by a separate demoulding apparatus. have.

After demolding the exterior member 100, the lower mold 220 and the upper mold 210 are bonded together, the mold 200 is heated, and then an acrylic monomer is injected into the mold 200 again. Through the process of cooling the mold 200 again, the exterior member 100 can be continuously formed.

100. Exterior member 200. Mold
210. Upper mold 211. Injection hole
212.Benthole 220.Bottom Mold
221. Molding part 222. Euro
223.Tube 230.Gasket

Claims (6)

In the mold for injecting acrylic monomer material to form a plate-shaped refrigerator exterior member,
An upper mold and a lower mold formed of a metal material and sequentially stacked and joined to each other;
A gasket interposed between the upper mold and the lower mold, and forming a space in which the acrylic monomer is injected to form the exterior member;
A molding part formed by the cutting process on the upper mold or the lower mold corresponding to the inside of the space, for molding a three-dimensional shape of the exterior member;
And a temperature control device capable of controlling the temperature of the mold by allowing a heat transfer medium such as water or oil to be circulated into the mold to circulate the mold.
The method of claim 1,
The upper mold and the lower mold is formed of an aluminum material, the exterior member molding mold of the refrigerator.
The method of claim 1,
The temperature control device is a mold for forming the exterior member of the refrigerator, characterized in that formed by a plurality of passages penetrating the mold in the horizontal direction.
The method of claim 1,
The temperature control device is formed on the outside of the mold inlet and outlet, the inside of the mold is formed by a flow path that is bent a plurality of times at regular intervals formed in the exterior member molding mold of the refrigerator.
The method of claim 1,
The mold is molded in the exterior member of the refrigerator, characterized in that the injection hole for injecting the acrylic monomer material and the polymerization initiator is formed in communication with the space in which the exterior member is molded.
The method of claim 1,
The mold for forming the exterior member of the refrigerator, characterized in that the vent hole for discharging the air generated when the exterior member is formed in the mold.

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