KR20170131054A - vaccum forming die for inner case of refrigerator - Google Patents

Abstract

An objective of the present invention is to provide a vacuum forming mold for a refrigerator inner case, the vacuum forming mold which is capable of reducing mold manufacturing time according to manufacturing of the mold by replacing blocks for common parts with blocks for different parts easily and compatibly according to models of the refrigerator inner case, and using the replaced blocks. The vacuum forming mold of the present invention, as the vacuum forming mold for the refrigerator inner case which forms a softened sheet into a shape of the refrigerator inner case, comprises a main block which has the shape of the refrigerator inner case, blocks which are protruded from an outer circumferential surface of the main block to form undercut portions, and a block driving unit which is installed in the main block to insert and extract the blocks. The block driving unit includes: a base part; support members which are installed in the base part; a rotating plate which is installed in the support member such that the rotating plate is moved forward and backward by horizontal guide members; the blocks which are installed in the rotating plate by a fixing unit such that the blocks are inserted into or extracted from the main block; an inserting and extracting unit which is installed in the base member to insert or extract the rotating plate in a lateral direction of the main block; and a position determining unit including at least two position determining pins which are installed in the rotating plate to separate the blocks and fix positions of the blocks with respect to the rotating plate, and which are connected to the rotating plate by interconnection pieces such that the position determining pins are moved forward and backward at the same time, a second actuator which is installed in the rotating plate to move the position determining pins forward and backward, and a position fixing block having a plurality of position combining parts installed in the blocks such that the position combining parts and the position determining pins are optionally operated.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a vacuum forming mold for a refrigerator,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a mold for in-vacuum vacuum molding for a refrigerator, and more particularly, to a mold for in-vacuum vacuum molding for a refrigerator in which a molding block for molding different parts according to a model of a vacuum molding die can be easily replaced .

Generally, a refrigerator is configured to supply fresh air generated from an evaporator of a refrigeration cycle to a storage room to maintain freshness of various foods for a long time.

 Such a refrigerator includes a cabinet on a housing, which is provided with a freezing compartment and a refrigerating compartment separated upward and downward, and a door that opens and closes an opening of the freezing compartment and the refrigerating compartment. The cabinet includes an inner surface for forming the freezing compartment and the refrigerating compartment, and an outer surface coupled to surround the inner surface. Between the inner surface and the outer surface, a heat insulating wall is provided for insulating the freezing compartment and the refrigerating compartment from the outside.

 The trauma is formed by bending a metal plate, and the inner surface and the gap are held so as to form an insulating wall by injecting urethane. The inner surface is formed as a solid body to form a freezing chamber and an inner wall of the refrigerating chamber. Since the inner surface of the inner cavity is deep, it is generally formed by vacuum molding as disclosed in Japanese Patent Application No. 10-0506807 .

 The internal phase is formed by softening the molding material by a mold for in-refrigerator inner vacuum molding. For example, when a soft sheet is placed on a mold and air for sucking the sheet is sucked through the vacuum suction hole, the sheet is brought into close contact with the surface of the mold so as to form a pair of cooling chambers, .

Such a mold for in-vacuum vacuum molding of the refrigerator is manufactured so as to be in conformity with the shape of the inner surface of the refrigerator. Particularly, the small and deep portion of the refrigerator can not be uniformly adhered to the surface of the mold, And the like.

In addition, the mold for in-vacuum vacuum molding of the refrigerator has a structure in which a main mold constituting the main body and a portion varying depending on the model of the refrigerator or undercut are formed in separate blocks and supported to the main mold. The block (molding block) has a structure that protrudes from the surface of the main mold when formed by a driving device provided inside the main mold, and is drawn in when the molded inner surface is drawn out from the main mold.

Korean Patent Registration No. 10-0994819 discloses a mold for internal vacuum molding. The posted mold includes an internal take-out portion for raising the divided core obliquely toward the main core so that the undercut portion on the inside of the refrigerator formed through the formed core portion can be taken out.

Korean Utility Model Registration No. 20-0447013 discloses a die for internal molding of a refrigerator. A guide post fixed to the base and having an upper end fixed to the inside of the mold block and a lower end fixed to the inside of the mold block, A cam block installed in the mold block so as to move the cam block vertically; and a cam groove provided in the cam block to move along the cam guide slot And a cam groove communicating with the cam guide slot and connected to the inside of the side mold plate to move laterally in unison with the side mold plate.

The conventional molds for in-mold forming of the refrigerator constructed as described above can not be used by replacing the design of the refrigerator or moving some of the blocks. That is, there is a problem that the replacement part block can not be used in a compatible manner as a model for supporting one block.

Korean Patent Registration No. 10-0994819 Korea Utility Model Registration No. 20-0447013

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a refrigerator which can replace a different part of a common part of a refrigerator in an easy and compatible manner, And to provide a mold for in-vacuum vacuum molding.

SUMMARY OF THE INVENTION The present invention provides a mold for in-vacuum vacuum molding for a refrigerator in which a block can be smoothly drawn out and drawn in order to prevent undercuts from being formed when the inner shape of a refrigerator is formed.

According to an aspect of the present invention, there is provided a mold for vacuum molding a built-in solid phase vacuum forming mold for molding a softened sheet into an inner shape of a refrigerator,

A main block having a shape of an inner surface of the refrigerator, blocks for forming an undercut portion protruding from an outer circumferential surface of the main block, and a block driving unit installed inside the main block for drawing and drawing unit blocks,

The block driving unit includes a base, support members installed on the base, a rotary plate installed on the support member and horizontally installed by horizontal guide members, and a rotary plate mounted on the rotary plate by a fixing unit Blocks to be input / output from the main block,

A take-in and take-out unit installed on the base member for pulling in and out the pivoting plate in the lateral direction of the main block,

At least two positioning pins provided on the rotating plate and separated and fixed to the rotating plate by mutual connection to the rotating plate and being moved back and forth at the same time, And a positioning unit having a first actuator for moving the pin forward and backward and a positioning block provided on the block and having a plurality of positioning portions for selectively positioning the positioning pins.

In the present invention, the fixed block is composed of a magnet provided on at least one side of a corresponding position of the block and the rotary plate.

Wherein the lifting and lowering unit includes a lifting block that is lifted and lowered by a vertical guide member installed on the base member and a lifting block that is connected to the lifting block by a connecting link, And a second actuator that lifts the lift block so that the block can be pulled from the outer circumferential surface of the main block when the connection link is inclined at the rising or falling of the lift block.

The mold for in-vacuum vacuum molding of a refrigerator according to the present invention can easily draw in and out a block to be subjected to undercutting when forming an inner surface for a refrigerator, and can easily change and fix a block (shape and position) And it is possible to reduce the production time and production cost of the mold.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially cutaway perspective view showing a mold for built-
Fig. 2 is a perspective view showing a block driving unit of a mold for in-phase vacuum forming for a refrigerator according to the present invention,
3 is a perspective view showing another embodiment of a block drive unit for built-in internal vacuum forming according to the present invention;

A built-in vacuum die for internal vacuum molding according to the present invention is for molding an internal surface of a refrigerator, and one embodiment is shown in Figs. 2 and 3 are perspective views showing other embodiments of the block drive unit, and like reference numerals designate like elements.

Referring to the drawings, a mold 10 for internal vacuum built-in vacuum forming according to the present invention forms a cabinet of a refrigerator for vacuum molding by using a softened inner surface sheet for forming a freezing chamber and a refrigerating chamber, A block 12 protruding from the outer circumferential surface of the main block 11 to form an undercut portion and a plurality of blocks 12 installed inside the main block 11 to extend and retract the block, And a block drive unit (20) The main block 11 provided with the blocks 12 for forming the inner shape has substantially the same shape as the shape of the inner surface of the refrigerator. Here, the shape of the main block 11 may be substantially the same in the case of a similar model of a refrigerator.

The block driving unit 20 is capable of pulling in and out the block 12 from the outer circumferential surface of the main block 11 with respect to the main block 11. The block driving unit 20 is provided on the lower surface of the main block 11, And the base member 21 is provided with the support members 22. A horizontal guide member 23 is slidably mounted to the support member 22 and a rotary plate 24 is provided at an end of the horizontal guide member 23. [

The block 12 is fixed to the rotary plate 24 by a fixed unit 30. [ The fixed unit 30 includes a permanent magnet 31 provided at least on one side of the block 12 and the rotary plate 24 to fix the block 12 to the rotary plate 24 by a magnetic force I have. A pulling-out and pulling-out unit 40 installed in the base member 21 for pulling and pulling the pivoting plate 24 in the lateral direction of the main block 11, And a positioning unit (50) for determining the separation and fixing position of the block (12) from the rotary plate (24).

A vertical guide member 41 is installed on the base member 21 and a lift block 42 is mounted on the vertical guide member 41 while sliding along the vertical guide member 41. The elevating block 42 may be supported by a separate guide member so as not to be shaken while being lifted along the vertical guide member 41. The base member 21 is provided with a first actuator 43 for moving up and down the lift block 42. The lift block 42 and the rotary plate 24 are connected by a connection link 44, The block 12 is pulled out of the outer peripheral surface of the main block 11 when the connecting link 44 is held in the horizontal posture by the one actuator 43 by the elevating and lowering of the elevating block 42, The block 12 is drawn from the outer peripheral surface of the main block 11 when the connecting link 44 is held in the inclined posture. The actuator 43 is a cylinder. A lead screw rotated by a motor and screwed to the lift block 42, and a rack and pinion structure. However, the present invention is not limited to this, and a structure capable of raising and lowering the elevating block 42 is possible.

The positioning unit 50 is for fixing and fixing the block 12 and detaching and attaching the block 12 attached to the rotary plate 24 by the fixing unit 30 and the rotary plate 24 And is rotatably supported by at least two positioning pins 52 whose front ends protrude from the front surface of the rotary plate 24, And a second actuator 53 installed on the positioning pin 52 for moving the positioning pin 52 forward and backward. The second actuator 53 preferably employs a cylinder.

The block 12 is provided with a position fixing block 55 having a plurality of position coupling portions 54 so as to be selectively positioned with the positioning pins 52. The position engaging portion 54 of the position fixing block 55 installed in the block 12 is fixed to the inner surface of the block 12 and has a plurality of Hole.

In order to vacuum-mold the inner surface of the refrigerator using the mold for in-phase vacuum molding for a refrigerator according to the present invention having the structure as described above, the rotary plate (not shown) of the block driving unit 20 installed inside the main block 11 of the refrigerator 24, the positioning pin 52 of the positioning unit 50 is advanced by using the second actuator 53, and then the block 12 is mounted on the end thereof. In this process, the block 12 is inserted into a coupling hole constituting the set positioning part 54. [

Then, the positioning pin (52) is retracted using the second actuator (53). The block 12 is fixed to the rotary plate 24 by the magnet of the fixed unit 30 provided on the block 12 or the rotary plate 24. [

 In the state where the block 12 is fixed to the rotary plate 23 as described above, the molding material which is a sheet for molding the inner surface for the refrigerator is softened and molded. For example, when a soft sheet is put on a mold, that is, the main block 11, and air is sucked through the vacuum suction holes, the sheet is conveyed to the main block 11 And is formed into the same shape as the outer surface of the main block 11 on which the blocks 12 are provided.

The first actuator 43 is operated to move the lifting block 42 upward or downward in order to separate the molded inner frame from the main block 11 provided with the block. When the rotary plate 24 is pulled inward by the connection link 44 and the rotary plate 24 supported by the support member 22 by the horizontal guide member 23 is moved upward by the lift block 42 The block 12 supported by the block 12 is pulled out from the outer peripheral surface of the main block 11. When the portion of the molded inner casing undercut is removed, the molded inner casing is easily separated from the main block 11. [ When the separation is completed, the first actuator is operated to transfer the elevation block 42 to keep the connection link 44 in a horizontal state, thereby drawing the block 12 from the main block 11, .

When the position of the block 12 is required to be moved to the main block 11 by the model change of the refrigerator, the second actuator 12 is operated to move the positioning pin 52 forward to be fixed to the rotary plate 24 A positioning portion 54 (a coupling hole) formed in the position fixing block 55 after the block 12 fixed by the unit 30 is separated and the positioning colon pin 52 is separated from the positioning portion 54, The positioning unit 54 and the positioning pin 52 are engaged with each other after the position of the block 12 is set. In this way, the position of the block 12 due to the change of the model of the refrigerator can be adjusted. Therefore, the mold apparatus for vacuum molding with a built-in refrigerator according to the present invention can be used in a compatible manner while changing the position of a block in which the model of the refrigerator is not largely deformed, and further, the manufacturing time and manufacturing cost of the mold can be reduced.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

The mold apparatus for inward vacuum forming an in-refrigerator according to the present invention can be applied to a portion where an undercut has occurred in various molds, and can be widely applied to a structure for changing the position of a core mold.

Claims (3)

For molding the softened sheet into the shape of the inner surface of the refrigerator,
A main block having a shape of an inner surface of the refrigerator; blocks for forming an undercut portion protruding from an outer circumferential surface of the main block; and a block driving unit installed inside the main block to draw and draw the block,
The block driving unit includes a base, support members installed on the base, a rotary plate installed on the support member and horizontally installed by horizontal guide members, and a rotary plate mounted on the rotary plate by a fixing unit Blocks to be input / output from the main block,
A take-in and take-out unit installed on the base member for pulling in and out the pivoting plate in the lateral direction of the main block,
At least two positioning pins provided on the rotating plate and separated and fixed to the rotating plate by mutual connection to the rotating plate and being moved back and forth at the same time, And a positioning unit having a second actuator for moving the pin forward and backward and a positioning block provided on the block and having a plurality of positioning portions for selectively positioning the positioning pins, Mold for vacuum forming. The method according to claim 1,
Wherein the fixed unit is made of a magnet provided on at least one side of a corresponding position of the block and the rotary plate. The method according to claim 1,
Wherein the lifting and lowering unit includes a lifting block that is lifted and lowered by a vertical guide member installed on the base member and a lifting block that is connected to the lifting block by a connecting link, And a first actuator for moving up and down the lift block so that the block can be drawn into the block when the connection link is inclined due to the rise or fall of the lift block.

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