KR102367171B1 - Manufacturing apparatus for handle of home appliance - Google Patents

Abstract

In an apparatus for manufacturing a handle for a home appliance according to the present invention, a cavity is formed in which a metal tube, which is a material for a handle of a home appliance, is accommodated, and the first mold and the second mold are molded by lifting and lowering to primarily shape the metal tube. ; a piston provided on one side of the first mold or the second mold and moved after the first mold and the second mold are molded; a piston receiving part into which the piston is inserted when the first mold or the second mold is molded; and a supply flow path connecting the piston accommodating part and the inner side of the metal tube mounted inside the cavity, wherein when the piston moves, the piston receiving part and the supply flow path and the fluid pressure inside the metal tube It is characterized in that the secondary molding of the metal tube.

Description

Handle manufacturing apparatus for home appliance { Manufacturing apparatus for handle of home appliance }

The present invention relates to an apparatus for manufacturing a handle for a household appliance.

In general, a door for opening and closing a predetermined space may be provided in home appliances such as refrigerators, ovens, microwaves, washing machines, and the like. In addition, the door may be provided with a handle for a user to open and close the door. And, the handle for such a home appliance has various structures and shapes, and may be configured so that a user can hold the handle in order to open and close the door.

As a representative of such handles, a bar-shaped handle made of a metal material and having a hollow interior may be used a lot. In addition, both ends of the handle may be fixed to the front side of the door, and a space between both ends of the handle may be spaced apart from the front side of the door so that a user can easily grasp it.

Meanwhile, Korean Patent Registration No. 10-0757451 discloses a door handle for a refrigerator and a manufacturing method thereof.

In detail, according to the prior art, a metal hollow tube is bent to form a door handle for a refrigerator, both ends of the metal tube are expanded by hydroforming, and then both ends of the tube are cut.

Through this, the door handle for the refrigerator can be molded to have a three-dimensional structure, and it is possible to form a handle that not only has an excellent appearance but also provides an excellent grip to the user.

As such, in order to form a tube shape having a non-uniform cross-sectional shape in the longitudinal direction, a hydroforming process must be performed.

However, such hydraulic equipment is not only bulky, but also requires an excessive initial cost because the equipment cost is very high. Therefore, there is a problem in that the application of other processing methods with relatively low formability is forced due to the high cost of hydraulic equipment.

The present invention provides an apparatus for manufacturing a handle for home appliances, which is integrally designed to provide a self-generated pressure for molding by pressurizing the fluid supplied into the hollow of the handle to a mold for press-working the handle of the home appliance. The purpose.

In an apparatus for manufacturing a handle for home appliances according to an embodiment of the present invention, a cavity is formed in which a metal tube, which is a material for a handle of a home appliance, is accommodated, and the first mold is lifted up and down for molding the metal tube; a mold including a second mold disposed below the first mold; an upper guide provided in the first mold and moving up and down together with the first mold, the upper guide having a pressure chamber accommodating a working fluid therein; a piston which is vertically movable in the pressure chamber and protrudes downward; a pressure generating device connected to the pressure chamber and supplying a working fluid to the pressure chamber for vertical movement of the piston; a lower guide provided at a position facing the upper guide of the second mold and having an upper surface opened to form a piston receiving part into which the piston is inserted when the first mold moves downward; and a supply passage connecting the piston accommodating part and the inner side of the metal tube disposed inside the cavity to supply a fluid inside the piston accommodating part, wherein the first mold is located in the uppermost state. A piston is positioned above the piston receiving part, and the piston is inserted into the piston receiving part in a state in which the first mold is moved downward and molded with the second mold, the first mold and the second mold In this combined state, the piston is further moved downward by the driving of the pressure generating device, and the piston accommodating part, the supply passage, and the fluid inside the cavity are pressurized to form the metal tube.
The second mold may be provided with a sealing member in close contact between the open both ends of the metal tube and the end of the supply passage to airtight.
The upper guide and the lower guide are provided on both sides corresponding to the open both ends of the metal tube, respectively, and a single pressure generating device may supply a working fluid to the pressure chambers inside the upper guide on both sides.
A valve for opening and closing the working fluid supply path according to the operation of the pressure generating device may be provided in the working fluid supply path connecting the pressurization chamber and the pressure generating device.
A controller for controlling the driving of the pressure generating device may be further included, and the controller may instruct the driving of the pressure generating device after the first mold and the second mold are molded.
The pressure generating device may be a hydraulic or pneumatic compressor.
The piston is formed to protrude only on either side of the left and right sides of the first mold or the second mold, and a guide post for guiding the molding of the first mold or the second mold may be provided on the other side.

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The handle manufacturing apparatus for home appliances according to an embodiment of the present invention has the following effects.

First, in an embodiment of the present invention, components that enable secondary molding by self-generated pressure after molding of the mold may be provided integrally with the mold. Therefore, since molding by hydraulic pressure generated in the mold is possible without an expensive hydraulic equipment, there is an advantage that equipment cost can be significantly reduced.

Second, in the embodiment of the present invention, the door handle can be manufactured by the components for generating hydraulic pressure integrated with the mold to fit the manufacture of the door handle without excessive increase in equipment cost. There is an advantage in that it can be easily produced at a price.

Third, in the embodiment of the present invention, the components for generating hydraulic pressure integrated with the mold are designed to generate a pressure suitable for the door handle produced in the mold, so that a compact facility configuration is possible, and the configuration of the manufacturing device with a simple structure is There are possible advantages.

1 is a perspective view of a refrigerator according to an embodiment of the present invention.
2 is a perspective view of a handle of the refrigerator.
3 is a cross-sectional view of the handle.
4 is a view schematically showing a structure of an apparatus for manufacturing a handle according to an embodiment of the present invention.
5 is a diagram sequentially illustrating an operation sequence of the manufacturing apparatus.
6 is a view schematically showing the structure of an apparatus for manufacturing a handle according to another embodiment of the present invention.
7 is a view schematically showing the structure of an apparatus for manufacturing a handle according to another embodiment of the present invention.

Hereinafter, specific embodiments of the present invention will be described in detail with drawings. However, the present invention cannot be said to be limited to the embodiments in which the spirit of the present invention is presented, and other inventions that are degenerative by addition, change, deletion, etc. of other components or other embodiments included within the scope of the present invention are easy. can suggest

Although the embodiment of the present invention has been described as an example of a refrigerator provided with a handle for convenience of understanding and description, it is to be noted in advance that the present invention is not limited thereto and can be applied to all home appliances provided with a tube-shaped handle on the door. make it clear

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

As shown in the drawings, the refrigerator 1 according to the embodiment of the present invention has an external appearance by a cabinet 10 forming a storage space and a door opening and closing the storage space from the front of the cabinet 10 . can be formed.

In the cabinet 10, the storage space inside is partitioned up and down by a barrier, the refrigerating compartment 12 is formed in the upper part, and the freezing chamber 13 is formed in the lower part. In addition, a plurality of drawers, shelves, baskets, and the like are provided inside the refrigerating compartment 12 and the freezing compartment 13 to accommodate food.

The door may include a refrigerating compartment door 20 for opening and closing the refrigerating compartment 12 and a freezing compartment door 30 for opening and closing the freezing compartment 13 . The freezing compartment door 30 is provided on the front side of the freezing compartment 13 , and is configured to be drawn in and out of the freezing compartment 13 like a drawer to open and close the freezing compartment 13 .

On the other hand, the refrigerator compartment door 20 and the freezing compartment door 30 may be provided with a door handle 40 for opening and closing the door. The door handle 40 may be formed of a metal material to realize a luxurious appearance, and both ends are fixed to the front surface of the refrigerator compartment door 20 or the freezer compartment door 30, and the refrigerator compartment door ( 20) or may be formed to be spaced apart from the front of the freezer door 30 so that the user can easily hold it. In addition, the door handle 40 is formed to be elongated in a horizontal or vertical direction to facilitate opening and closing of the refrigerator compartment door 20 and the freezing compartment door 30 .

The door handle 40 may have the same structure and shape in the refrigerating compartment door 20 and the freezing compartment door 30 . Of course, the shape of the door handle 40 provided in the refrigerator compartment door 20 and the freezer compartment door 30 may be different if necessary, but it is formed in a shape extending in the longitudinal direction and has a basic structure in which both ends are fixed. will be the same.

2 is a perspective view of a handle of the refrigerator. And, Figure 3 is a cross-sectional view of the handle.

As shown in the drawing, the door handle 40 may be formed to be elongated in the longitudinal direction, and may be formed in a tube shape with a hollow 43 formed therein. The door handle 40 may be formed of a metal material. Accordingly, the door handle 40, which the user's hand comes into direct contact with, can convey the texture of metal to the user, and can be molded into a single part by a mold.

Mounting portions 41 may be formed at both ends of the door handle 40 , and extension portions 42 may be formed between the mounting portions 41 . The mounting part 41 may open toward the front side of the refrigerating compartment door 20 or the freezing compartment door 30 , and the extension part 42 is spaced apart from the front side of the refrigerating compartment door 20 or the freezing compartment door 30 . make it possible To this end, the mounting portion 41 may extend in a direction crossing the extension direction of the extension portion 42 , or may be formed to extend inclinedly or roundly.

In addition, the door handle 40 may be formed to have a different cross-sectional shape as a whole. In detail, the extension portion 42 of the door handle 40 may be formed to have a relatively small cross-sectional area or to be formed thin so that the user can easily grip it. On the other hand, the mounting portion 41 of the door handle 40 may be formed to be relatively larger or thicker than the extension portion 42 in cross-sectional area for stably fixing the door handle 40 . .

The end of the mounting part 41 may be opened toward the front of the refrigerator compartment door 20 or the freezer compartment door 30 , and the size of the opening is formed to be sufficiently large for fixing the door handle 40 . structure to be provided.

On the other hand, the shape of the extension part 42 is also not constant along the longitudinal direction and may have different cross-sectional areas, and may be formed in a shape having different cross-sectional areas in each part to make the appearance more beautiful and stand out.

As such, the door handle 40 press-works a metal tube 44, which is a raw material, with a mold, and generates additional pressure by the pressure of the fluid to form the door handle 40 having a structure having various cross-sectional areas. it becomes possible

Hereinafter, the manufacturing apparatus 100 capable of forming the hollow metal tube 44 to form the door handle will be described with reference to the drawings.

4 is a view schematically showing the structure of an apparatus for manufacturing a handle according to an embodiment of the present invention.

As shown in the drawing, the handle manufacturing apparatus 100 includes a mold for forming a cavity 132 that is a space in which a metal tube 44 used as a material of the door handle 40 is accommodated. The mold may be composed of a first mold 110 and a second mold 120 that are arranged vertically, and at least one of the first mold 110 and the second mold 120 is to be moved in the vertical direction. configured to be able to In addition, when the first mold 110 or the second mold 120 is moved, the metal tube 44 that is molded to each other and accommodated in the cavity 132 may be configured to be primarily molded.

In addition, supply passages 130 communicating with the cavity may be formed on both sides of the first mold 110 and the second mold 120 . The supply passage 130 is configured such that the piston receiving part 122 and the cavity 132 outside the second mold 120 communicate with each other. Accordingly, the water supplied to the inside of the piston receiving part 122 can be introduced into the metal tube 44 seated inside the cavity 132 through the supply passage 130 .

A sealing member 131 is provided at an end of the supply passage 130 . The sealing member 131 may communicate with both open ends of the door handle 40 inside the cavity 132 , and the water supplied through the supply passage 130 does not leak and the door handle 40 ) can be configured to face. The position and shape of the supply flow path 130 and the sealing member 131 may be variously changed according to the structure of both open ends of the door handle 40 .

In addition, the lower guide 121 in which the piston receiving part 122 is formed may be formed on the left and right sides of the second mold 120 . The lower guide 121 is formed so that a piston 113 to be described below can be accommodated in the piston receiving part 122 when the first mold 110 and the second mold 120 are molded together.

To this end, the piston receiving part 122 is formed to communicate with the supply passage ( ) of the second mold 120 and is formed to open upward. Accordingly, when molded with the first mold 110 , the piston 113 moves along the inside of the piston accommodating part 122 to pressurize the water therein.

Also, although not shown, a separate pump and a valve for supply and discharge of the water, and a flow path connecting the pump and the valve and the piston receiving part 122 may be further formed in the second mold 120 .

Water filled inside the piston receiving part 122 and the supply passage 130 and the metal tube 44 is pressurized from the inside of the metal tube 44 for secondary molding of the metal tube 44 As such, a fluid other than water may be accommodated, and if necessary, the same fluid as the working fluid pressurized by the pressure generating device 140 to be described below may be used.

Meanwhile, upper guides 111 may be formed on both left and right sides of the first mold 110 . A pressure chamber 112 may be formed inside the upper guide 111 . The pressure chamber 112 is a space in which the working fluid supplied from the pressure generating device 140 is accommodated, and the piston 113 mounted on the upper guide 111 can be operated.

One end of the piston 113 is accommodated in the pressure chamber 112 and is moved up and down according to the pressure inside the pressure chamber 112 to adjust the degree of protrusion to the outside of the upper guide 111 . there is.

In addition, the piston 113 is inserted into the piston receiving part 122 when the first mold 110 and the second mold 120 are molded to each other, and the first mold 110 and the second mold 120 are inserted into the piston 113 . It allows the mold 120 to be molded to each other at the correct position. In addition, the piston 113 may protrude due to an increase in the pressure of the pressure chamber 112 , and water inside the piston receiving part 122 may be pressurized.

On the other hand, the pressure chamber 112 may be connected to the pressure generating device 140 by the working fluid supply passage 170 . The pressure generating device 140 is configured to provide pressure to the working fluid. The pressure generating device 140 may be designed with a capacity capable of providing the secondary pressure required for molding the door handle 40 formed by the mold and the set as a set.

In addition, the pressure generating device 140 may be composed of a hydraulic pump, a compressor, etc., and is configured in multiple stages to provide sufficient pressure when using pneumatic pressure to sufficiently provide the pressure required for molding the door handle 40 . It can be configured to

A valve 150 may be provided in the working fluid supply passage 170 connected to the outlet of the pressure generating device 140 . By opening and closing the valve 150 , the high-pressure working fluid supplied from the pressure generating device 140 can be supplied to the pressurization chamber 112 along the working fluid supply passage 170 .

Meanwhile, the valve 150 and the pressure generating device 140 may be controlled by the controller 160 . In addition, the controller 160 may be linked to the operation of the mold, and after primary molding performed by pressurization by the movement of the mold, the pressure generating device 140 and the valve 150 are driven to pressurize water. Secondary molding carried out with

Hereinafter, an operation of the apparatus for manufacturing a handle for home appliances according to an embodiment of the present invention having the above structure will be described.

5 is a diagram sequentially illustrating an operation sequence of the manufacturing apparatus.

In order to form the door handle 40, first, in a state in which the first mold 110 and the second mold 120 are separated, as shown in FIG. 5A, the door handle is placed inside the cavity 132. A metal tube 44 that is the original material of (40) is mounted. At this time, the metal tube 44 is in close contact with the sealing member 131 and is in communication with the supply passage 130 .

In such a state, the pressure generating device 140 is not driven. And, the piston 113 is in a state protruding downward,

In this state, the first mold 110 moves downward to be in a state as shown in (b) of FIG. 5 . The metal tube 44 disposed in the region of the cavity 132 by the downward movement of the first mold 110 is subjected to the pressure when the first mold 110 and the second mold 120 are molded together. It is possible to be first molded by The outer shape of the metal tube 44 may be deformed according to the shape of the cavity 132 by the molding of the first mold 110 and the second mold 120 , and the door handle 40 may be molded. The primary shape of can be formed.

At this time, the piston 113 mounted on the upper guide 111 is positioned vertically above the piston accommodating part 122 , and the lower end of the piston 113 is inserted into the piston accommodating part 122 . to guide the vertical movement of the first mold 110 .

In addition, in a state in which the first mold 110 and the second mold 120 are molded together, the pressure generating device 140 may be driven by the controller 160 and the valve 150 may be opened. By driving the pressure generating device 140 and opening the valve 150 , pressure can be provided to the working fluid. Accordingly, the pressure inside the pressure chamber 112 may increase, and as shown in FIG. It becomes possible to pressurize the water on the metal tube 44 .

Water on the piston receiving part 122 , the supply passage 130 , and the metal tube 44 may be supplied immediately before the pressure generating device 140 is driven, and if necessary, the metal tube 44 may be It may be supplied immediately after being disposed inside the cavity 132 .

When water in the piston accommodating part 122, the supply passage 130, and the metal tube 44 is pressurized by the movement of the piston 113, the metal tube 44 by the pressure of the water accommodated inside the metal tube 44 The tube 44 may be secondary molded. Due to the self-generated hydraulic pressure in the mold, tube expansion molding, which is difficult to mold during primary molding by the mold, is possible.

The molding of the door handle 40 may be completed by the secondary molding as described above, and after the molding of the door handle 40 is completed, the first mold 110 as shown in FIG. 5D . After moving upward, the first mold 110 and the second mold 120 are separated, and then the molded door handle 40 is taken out from the inside of the cavity 132 . Of course, before taking out the door handle 40 , the water filled in the piston receiving part 122 , the supply passage 130 , and the metal tube 44 may be drained.

On the other hand, the apparatus for manufacturing a handle for home appliances according to the present invention may be capable of various other embodiments in addition to the above-described embodiments.

The apparatus for manufacturing a handle for home appliances according to another embodiment of the present invention is characterized in that it has a structure that enables secondary molding by generating magnetic pressure by moving a piston by a motor mounted on a mold.

Hereinafter, an apparatus for manufacturing a handle for a home appliance according to another embodiment of the present invention will be described with reference to the drawings. The apparatus for manufacturing a handle for home appliances according to another embodiment of the present invention is different only in the structure for driving the piston, and since the other components are the same as in the above-described embodiment, the same reference numerals are used for the same components, and the A detailed description will be omitted.

6 is a view schematically showing a structure of an apparatus for manufacturing a handle according to another embodiment of the present invention.

As shown in the drawing, the manufacturing apparatus 100 according to another embodiment of the present invention includes a first mold 110 and a second mold 120 having a cavity 132 formed therein, and the first mold The sealing member 131 and the supply passage 130 may be provided in the 110 and the second mold 120 .

And, on both sides of the first mold 110, an upper guide 111 on which a piston 113 is vertically movable, and a piston accommodating part 122 for allowing the piston 113 to enter and exit are formed. A lower guide 121 may be provided. In addition, the piston accommodating part 122 and the inside of the supply passage 130 communicate with each other so that water for secondary molding can be filled.

Meanwhile, a motor 180 may be provided inside the upper guide 111 . The motor 180 is like a servo motor rotated by power supply, and may be configured to be connected to the piston 113 with a gear, etc. to move the piston 113 up and down, and the first mold (110) may be provided inside the upper guide 111 on both sides.

In addition, the motor 180 positioned on both sides may be controlled to be driven by the controller 160 , and after the first mold 110 and the second mold 120 are molded and the primary molding is completed, the motor 180 may be controlled to be driven. To this end, the controller 161 may be configured to control the driving of the mold or at least receive information according to the driving of the mold.

Accordingly, when the first mold 110 and the second mold 120 are molded by the downward movement of the first mold 110 , the door handle 40 is first molded. And, when the motor 180 is driven by the controller 161, the piston 113 can be moved downward. And, the downward movement of the piston 113 pressurizes the water inside the piston accommodating part 122, and magnetic pressure is generated inside the mold, so that the door handle 40 is a secondary molding in which tube expansion is performed. This becomes possible.

Meanwhile, according to another embodiment of the present invention, the motor 180 may be provided only on either side of the left and right sides of the first mold 110 rather than on the left and right sides.

7 is a view schematically showing the structure of an apparatus for manufacturing a handle according to another embodiment of the present invention.

As shown in the drawing, the upper guide 111 of one of the left and right sides of the first mold 110 may be provided with a piston 113 that is lifted by the motor 180 . In addition, a guide post 114 protruding downward may be formed on the upper guide 111 of the other one of the left and right sides of the first mold 110 .

The guide post 114 is inserted into the piston receiving part 122 when the first mold 110 and the second mold 120 are molded together by the downward movement of the first mold 110 , The opened upper surface of the piston receiving part 122 is shielded.

Accordingly, when the motor 180 is driven by the controller 161 in this state, the water filled in the piston receiving part 122 and the supply passage 130 is pressurized by the movement of the piston 113 . In this case, the secondary molding of the door handle 40 is formed by the self-generated pressure.

Claims (10)

A mold having a cavity in which a metal tube, which is a material for a handle of a home appliance, is accommodated, and comprising a first mold that is lifted up and down for molding the metal tube, and a second mold that is disposed below the first mold ;
an upper guide provided in the first mold and moving up and down together with the first mold, the upper guide having a pressure chamber accommodating a working fluid therein;
a piston which is vertically movable in the pressure chamber and protrudes downward;
a pressure generating device connected to the pressure chamber and supplying a working fluid to the pressure chamber for vertical movement of the piston;
a lower guide provided at a position facing the upper guide of the second mold and having an upper surface opened to form a piston receiving part into which the piston is inserted when the first mold moves downward; and
and a supply passage connecting the piston accommodating part and the inside of the metal tube disposed inside the cavity to supply a fluid inside the piston accommodating part,
In a state in which the first mold is located at the uppermost position, the piston is located above the piston receiving part,
In a state in which the first mold is moved downward and molded with the second mold, the piston is inserted into the piston receiving part,
In a state in which the first mold and the second mold are molded, the piston is further moved downward by the driving of the pressure generating device, and the piston receiving part, the supply passage, and the fluid inside the cavity are pressurized to form the metal tube. A handle manufacturing apparatus for home appliances, characterized in that.
The method of claim 1,
The apparatus for manufacturing a handle for home appliances, characterized in that the second mold is provided with a sealing member in close contact between the open both ends of the metal tube and the end of the supply passage.
The method of claim 1,
The upper guide and the lower guide are respectively provided on both sides corresponding to the open both ends of the metal tube,
A handle manufacturing apparatus for home appliances, characterized in that the working fluid is supplied to the pressure chambers inside the upper guides on both sides by one pressure generating device.
4. The method of claim 3,
The apparatus for manufacturing a handle for home appliances, characterized in that a valve for opening and closing the working fluid supply path according to the operation of the pressure generating device is provided in the working fluid supply path connecting the pressurization chamber and the pressure generating device.
The method of claim 1,
A controller for controlling the driving of the pressure generating device is further included,
and the controller instructs to drive the pressure generating device after the first mold and the second mold are molded.
The method of claim 1,
The pressure generating device is a handle manufacturing device for home appliances, characterized in that the hydraulic or pneumatic compressor.
delete The method of claim 1,
The piston is formed to protrude only on either side of the left and right sides of the first mold or the second mold,
The apparatus for manufacturing a handle for home appliances, characterized in that a guide post for guiding the molding of the first mold or the second mold is provided on the other side.
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