KR20040032406A - Manufacturing method of a inner cabinet for using a refrigerator and a mold for using thereof - Google Patents

Abstract

PURPOSE: A method for manufacturing an inner cabinet for a refrigerator and a mold thereof are provided to remove non-formed areas generated in flange parts for reducing the reject rate in the manufacturing of the refrigerator inner cabinet. CONSTITUTION: A method for manufacturing an inner cabinet for a refrigerator includes the steps of preparing a mold having main body mold part(31) and a flange mold part(32) formed with movement holes(33), preparing a movable mold part(35) slidably protruded via the movement holes. A sheet for the inner cabinet is provided to the mold. The main body of the inner cabinet and the flange part are molded by removing air between the sheet and the mold. Concave groove forming parts(34) are formed to the flange part by the protrusion of the movable mold part via the movement holes.

Description

Method for manufacturing inner case for refrigerator and mold used therein {MANUFACTURING METHOD OF A INNER CABINET FOR USING A REFRIGERATOR AND A MOLD FOR USING THEREOF}

The present invention relates to a method for manufacturing an inner box for a refrigerator and a mold used therein, and more particularly, to a method for manufacturing an inner box for a refrigerator in which an unmolded portion of a flange part is minimized and a mold used for the same.

As shown in FIG. 1, the refrigerator 10 fills a predetermined foaming liquid into an outer box 11 having a pair of storage spaces partitioned with an intermediate partition therebetween and a storage space of the outer box 11. It has an inner box 12 spaced apart to have a space and coupled from the front to form a pair of cooling chambers, and a door 16 for rotating and opening the front opening of the cooling chamber.

A mechanical chamber in which a compressor, a condenser, an evaporator, and the like are installed is formed at the rear of the cooling chamber of the inner phase 12, and the foam space is filled with a foam liquid for thermal insulation. The front surface of the door 16 is provided with a handle 17 to facilitate the user's grip to open the door 16 in the rotational direction, respectively.

The inner phase 12 has an inner phase body 13 having a substantially square cylindrical shape having a front opening, and a flange portion 14 bent outward from an end of the inner phase body 13. The inner body 13 forms the outer wall of the cooling chamber of the refrigerator 10, the flange portion 14 is in contact with the front skeleton portion of the outer box (11).

In the flange portion 14, recessed grooves 15 and 15 recessed backward from the plate surface are formed along the circumference of the inner phase main body 13. In the concave groove 15, a hot pipe is installed to prevent dew condensation occurring in the flange portion 14 forming the front surface of the refrigerator 10.

The inner phase 12 of the refrigerator 10 is molded by the mold 130 shown in FIG. The conventional metal mold | die 130 which shape | molds the internal image 12 for refrigerators has the main-body mold part 131 which shape | molds the inner-body main body 13, and the planar mold part 132 which shape | molds the flange part 14. As shown in FIG.

The main body mold part 131 has an opposite shape corresponding to the shape of the inner body body 13 so as to form the inner body body 13. The plan now mold part 132 extends outward from the lower peripheral region of the main body mold part 131 and is integrally formed with the main body mold part 131.

The plan now mold 132 is provided with a concave groove forming portion 134 protruding from the plate surface along the circumference of the main mold portion 131, and the concave groove 15 provided in the flange portion 14 when forming the inner box 12. Will be molded.

The manufacturing method of the inner case 12 for refrigerators using the conventional metal mold | die 130 by the said structure is as follows.

First, a vacuum molding apparatus provided with a mold 130 is provided, and an inner phase sheet (not shown, a material before molding of the inner phase) is placed on the mold 130. Here, the inner phase sheet has a state softened by heat. Then, when the air between the mold 130 and the inner sheet is removed through an air hole (not shown) formed in the mold 130 to remove the air between the mold 130 and the inner sheet, the inner sheet is transferred to the mold 130. The adsorption inner phase 12 is shape | molded by adsorption.

However, in the conventional mold 130, the gap between the concave groove forming portion 134 and the main body mold portion 131 is narrow, the problem that the inner phase 12 is not molded according to the shape of the mold 130. (See Fig. 3). In particular, in the case of the concave groove 15 formed along each edge circumferential region of the inner wound body 13, the thickness of the inner wound 12 is so great that the concave groove forming portion 134 and the main mold portion 131 are not formed. There is a problem that the failure rate is high.

Accordingly, it is an object of the present invention to provide a method for manufacturing a refrigerator inner box and a mold used therein, by removing the unmolded region occurring in the flange portion, thereby reducing the defective rate of the inner box for the refrigerator.

1 is an exploded perspective view of a refrigerator,

2 is a perspective view of a conventional mold,

3 is a schematic cross-sectional view of a conventional mold,

4 is a perspective view of a mold according to the present invention,

5 is a partially enlarged perspective view of a mold according to the present invention;

6A and 6B are cross-sectional views briefly illustrating a process of forming an internal wound by a mold according to the present invention.

* Explanation of symbols for the main parts of the drawings

10: refrigerator 11: trauma

12: internal injury 13: internal body

14: flange 15: concave groove

16 door 17 handle

30: mold 31: body mold part

32: plan now part 33: movable hole

34: recessed groove forming part 35: movable mold part

36: air cylinder 37: piston rod

According to the present invention, there is provided a manufacturing method of an inner box for a refrigerator having an inner box main body having a cooling chamber and a flange portion bent outward from an end of the inner box main body, the main body mold part for forming the inner box main body; And providing a mold having the planar mold portion formed with the movable hole and forming the flange portion; Providing a movable mold part slidingly protruding through the movable hole; Accessing the inner sheet to the mold; Forming the inner wound body and the flange part by removing air between the inner wound sheet and the mold; The movable mold is achieved by the method of manufacturing an inner box for a refrigerator, comprising the step of protruding through the movable hole to form a concave groove in the flange portion.

Here, the concave groove is preferably formed along each corner region of the inner body main body on the plate surface of the flange portion.

It is preferable to further include the step of retracting the movable mold portion into the movable hole after the concave groove is formed.

On the other hand, the object of the present invention is a mold for forming an internal wound body for a refrigerator having a cooling chamber formed therein and a flange portion bent outward from an end of the inner wound body, the main mold portion for forming the inner wound body; A plan now part which forms the flange part and has at least one movable hole formed therein; It can be achieved by a mold, characterized in that it comprises a movable mold portion for sliding the protrusion from the plan now mold portion through the movable hole to form a concave groove in the flange portion.

Preferably, the movable mold portion further includes an actuator to allow sliding movement through the movable hole. Here, the actuator is preferably an air cylinder.

Further, the movable hole is preferably formed in each corner region of the main body mold portion on the plate surface of the plan now mold portion.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, the refrigerator 10 is as described above. That is, in the refrigerator 10, as illustrated in FIG. 1, a predetermined foam is formed in the outer box 11 having a pair of receiving spaces interposed between the middle partition walls and the receiving space of the outer box 11, respectively. It has an inner phase 12 spaced apart to have a liquid filling space and coupled from the front to form a pair of cooling chambers, and a door 16 for rotating and opening the front opening of the cooling chamber.

A mechanical chamber in which a compressor (not shown), a condenser (not shown), an evaporator (not shown), and the like are installed is formed at the rear of the cooling chamber of the inner bed 12, and a foaming liquid for filling the insulation is filled in the foam space. The front surface of the door 16 is provided with a handle 17 to facilitate the user's grip to open the door 16 in the rotational direction, respectively.

The inner phase 12 has an inner phase body 13 having a substantially square cylindrical shape having a front opening, and a flange portion 14 bent outward from an end of the inner phase body 13. The inner body 13 forms the outer wall of the cooling chamber of the refrigerator 10, the flange portion 14 is in contact with the front skeleton portion of the outer box (11).

In the flange portion 14, recessed grooves 15 recessed rearward from the plate surface are formed along the circumference of the inner body main body 13. In the concave groove 15, a hot pipe (not shown) is installed to prevent dew condensation generated from the flange 14 forming the front surface of the refrigerator 10.

Such a refrigerator inner box 12 is molded by the mold 30 according to the present invention shown in FIGS. 4 and 5. The metal mold | die 30 which concerns on this invention has the main-body mold part 31 which shape | molds the inner cylinder main body 13, and the plan now mold part 32 which shape | molds the flange part 14. As shown in FIG.

The main body mold part 31 has an opposite shape corresponding to the shape of the inner body body 13 so as to form the inner body body 13. The plan now mold part 32 extends outward from the lower peripheral area of the main body mold part 31, and is integrally formed with the main body mold part 31. As shown in FIG.

The plan now mold part 32 is provided with the movable hole 33 along each edge area | region of the main body mold part 31. As shown in FIG. The movable hole 33 is formed in a "b" shape along each corner region of the main body mold part 31, and the plan now-shaped part 32 between each movable hole 33 protrudes from the plate surface. The part 34 is provided. Here, the concave groove forming part 34 forms the concave groove 15 of the flange portion 14 together with the movable mold part 35 which will be described later when forming the inner box 12.

The movable mold part 35 is inserted into the movable hole 33 to be slidable. The movable mold part 35 has a substantially "A" shape corresponding to the shape of the movable hole 33, and slides through the movable hole 33 to protrude from the plate surface of the plan now mold part 32, or to move the movable hole ( 33) It is provided to be retracted by sliding inward.

The movable mold part 35 is connected to an actuator that provides a moving force to be slidably movable through the movable hole 33. In one embodiment of the actuator, an air cylinder 36 using air pressure may be used. That is, the piston rod 37 of the air cylinder 36 is connected to the opposite side of the side of the movable mold portion 35 in contact with the inner sheet of the movable mold 35, so that the reciprocating motion of the piston (not shown) in the air cylinder 36 is movable. It is delivered to the unit (35).

By the above configuration, the process of molding the refrigerator inner box 12 using the mold 30 according to the present invention is as follows.

First, a vacuum molding apparatus (not shown) provided with a mold 30 according to the present invention is provided, and an inner sheet is placed on the mold 30. Here, the inner phase sheet is provided in a state softened by heat, and the movable mold part 35 maintains the state which was retracted inside the movable hole 33.

Then, when the air between the mold 30 and the inner sheet is removed through an air hole (not shown) formed in the mold 30, the inner sheet is transferred to the mold 30 when the air between the mold 30 and the inner sheet is removed. By adsorption, the inner phase body 13 and the flange part 14 are shape | molded (refer FIG. 6A).

Next, the movable mold part 35 slides through the movable hole 33 by the operation of the air cylinder 36 to protrude from the plan now mold part 32 to form the concave groove 15 of the flange part 14 ( 6b), the manufacture of the refrigerator inner box 12 is completed.

When the manufacture of the refrigerator inner box 12 is completed by the above process, the inner box 12 is removed from the mold 30, and another manufacturing step of the inner box 12 is performed. At this time, the air cylinder 36 is moved, and the movable mold part 35 slides back into the movable hole 33 to prepare for the manufacture of the next inner box 12.

In the above-described embodiment, although the movable mold part 35 is shown to be provided along each corner area of the main body mold part 31, all or all of the concave groove forming parts 34 forming the concave groove 15 are formed. Of course, some may be provided to be movable sliding.

Thus, the movable mold part 35 which slides from the plan now mold part 32 through the movable hole 33 formed in the plan now mold part 32, and forms the recessed groove 15 in the flange part 14 is provided. Thus, the molding between the concave groove 15 of the flange portion 14 and the inner phase body 13 can be completed.

As described above, according to the present invention, there is provided a manufacturing method of a refrigerator inner box and a mold used therein, by removing the unmolded region occurring in the flange portion to reduce the defective rate of the inner box for the refrigerator.

Claims (7)

In the manufacturing method of an inner box for a refrigerator having an inner box body formed with a cooling chamber and a flange portion bent outward from the end of the inner box body, Providing a mold having a main body mold part for molding the inner body and a plan now mold part for forming the flange part and having a movable hole formed therein; Providing a movable mold part slidingly protruding through the movable hole; Accessing the inner sheet to the mold; Forming the inner wound body and the flange part by removing air between the inner wound sheet and the mold; And the movable mold portion protrudes through the movable hole to form a concave groove in the flange portion. The method of claim 1, The concave groove is formed on the plate surface of the flange portion along the respective corner regions of the inner box body, the manufacturing method of the inner box for the refrigerator. The method according to claim 1 or 2, And after the recess is formed, retracting the movable mold part into the movable hole. In the metal mold | die which shape | molds the inner phase body for refrigerators which has the internal chamber body in which the cooling chamber was formed, and the flange part bent outwardly from the edge part of the said inner body body, A main body mold part for molding the inner phase body; A plan now part which forms the flange part and has at least one movable hole formed therein; And a movable mold portion slidingly protruding from the plan now mold portion through the movable hole to form a concave groove in the flange portion. The method of claim 4, wherein The movable mold part further comprises an actuator to enable the sliding movement through the movable hole. The method of claim 5, The actuator is a mold, characterized in that the air cylinder. The method according to any one of claims 4 to 6, And said movable hole is formed in each corner region of said main body mold part on the plate surface of said plan now mold part.