KR101887519B1 - Insulation panel and manufacturing method of it - Google Patents

Abstract

The present invention relates to a composite heat insulating material formed so that a vacuum heat insulating material is embedded in a foam body and a method for manufacturing the same. The composite heat insulating material according to the present invention comprises: a vacuum heat insulating material; and a cover part made of a foamed resin which surrounds the outside of the vacuum heat insulating material. The method for manufacturing the composite heat insulating material of the present invention comprises the steps of: preparing a forming mold for molding a foaming resin; mounting a vacuum heat insulating material inside the forming mold; injecting a foamable raw material into the forming mold after closing the forming mold; and supplying a steam to the inside of the forming mold to foam-mold the foam raw material to mold a cover part surrounding the outside of the vacuum heat insulating material. The composite heat insulating material of the present invention can maintain the heat insulation performance of the vacuum heat insulating material for a long time and protect the vacuum heat insulating material from external impact, thereby increasing the service life of the vacuum heat insulating material.

Description

 BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a composite insulation material,

The present invention relates to a composite heat insulator and a method of manufacturing the same, and more particularly, to a composite heat insulator formed so that a vacuum insulator is embedded in a foam and a method of manufacturing the same.

Insulation materials are used in buildings, refrigerators, heating appliances, etc. to block heat transfer inside and outside.

Conventionally, a foamed material such as foamed styrene or foamed polyurethane has been widely used as a heat insulating material. However, in recent years, slimness and high performance heat insulating materials have been required, and vacuum heat insulating materials are widely used.

Recently, the vacuum insulation material has a thermal conductivity of 3 to 4 mW / mK, so that the thickness of the vacuum insulation material can be reduced compared to a conventional insulation material made of foam such as expanded polystyrene foamed polyurethane. Therefore, there is an advantage that the indoor area of the building can be expanded or the size of the household appliance can be miniaturized.

Vacuum insulation is very important to keep the inside of the vacuum in order to maintain the insulation performance. In case of collision with nails or other objects, the surface is damaged and the internal vacuum can not be maintained. Problems can arise.

To solve this problem, a technique has been developed in which a vacuum insulator is wrapped with a foam to protect the outside.

However, in the case of the heat insulating material which surrounds the vacuum insulating material through the conventional vacuum foamed material, it is difficult to place the vacuum insulating material in the center of the foamed material, and the strength of the foamed material is weak. .

Korean Registered Patent No. 10-0389397: Composite Vacuum Insulation and Manufacturing Method Thereof Korean Patent No. 10-1645974: Composite thermal insulator with vacuum insulation and manufacturing method thereof

SUMMARY OF THE INVENTION It is an object of the present invention to provide a composite thermal insulation material including a foam surrounding an outer surface of a vacuum insulation material and a method of manufacturing the same.

The composite insulation according to the present invention includes a vacuum insulation panel and a cover part made of a foamed resin to cover the outside of the vacuum insulation panel.

And a support body extending from one side of the vacuum insulation material to a molding die for molding the cover part so that the distance from the outer circumferential surface of the vacuum insulation material to the outer circumferential surface of the cover part is uniform.

The cover portion is formed by foam molding the foam raw material, and the foam raw material may be formed by mixing expanded graphite with a binder and polystyrene.

A method of manufacturing a composite heat insulating material according to the present invention includes the steps of preparing a molding die for molding a foamed resin, mounting a vacuum insulator on the interior of the molding die, expanding the interior of the molding die after closing the molding die And a step of molding the foam material by foaming the foaming material by supplying steam to the inside of the molding die to form a cover part surrounding the outside of the vacuum insulation material.

An end portion of a support rod coupled to one side of the vacuum insulation member is seated on the molding die to mount the vacuum insulation member so as to be spaced from the inner circumferential surface of the molding die when the vacuum insulation member is mounted on the molding die, The vacuum insulator and the support rod.

A first mold and a second mold for forming a molding space in which the molding molds are coupled to each other and in which the vacuum insulating material is embedded and the cover portion is formed; And a pressure driver for driving the pressing member to advance and retreat.

A support pin which is capable of entering or retracting into the molding space so as to support the vacuum insulator at a predetermined distance from the inner circumferential surface of the first mold or the second mold at one side of the first mold or the second mold, The supporting pin may be separated from the vacuum insulating material at a time when the vacuum insulating material can be supported by the raw material of the foam in the process of foam molding the foam raw material, And may be formed to escape from the molding space.

The vacuum insulator is provided with a protection plate for preventing damage by the support pin to a contact position where the support pin contacts with the vacuum insulation panel. .

Wherein the forming die is provided with a supporting block which is capable of entering into the molding space or moving outward from the forming space, wherein in the step of preparing the forming die, the supporting block is in the state of entering the forming space, The vacuum insulator is seated in a support block in a state of entering the molding space and then the mold material is inserted into the molding die and then the support block is drawn out from the molding space of the molding die have.

Wherein the molding die includes an inner mold forming the molding space and an outer mold surrounding the outer periphery of the inner mold and defining a predetermined space between the inner mold and the inner mold, Wherein the inner mold has an inner circumferential surface and an outer circumferential surface, and the inner mold has a steam supply hole having a diameter smaller than that of the raw material of the foam, A plurality of block actuators for advancing and retreating the support blocks are installed in the outer mold through the lower and side portions of the first inner mold, So that steam can be supplied through the space.

The composite heat insulating material according to the present invention is formed to enclose the vacuum heat insulating material in the foam, thereby maintaining the heat insulating performance of the vacuum insulating material for a long time and protecting the vacuum heat insulating material from external impact, thereby increasing the service life of the vacuum insulating material.

1 is a partially cutaway perspective view of one embodiment of a composite insulation according to the present invention,
FIG. 2 is a cross-sectional view of the composite insulation of FIG. 1,
FIG. 3 is a conceptual view showing the manufacturing process of the composite heat insulating material of FIG. 1,
FIG. 4 is a flowchart showing a manufacturing process of the composite insulation of FIG. 3,
5 is a partially cutaway perspective view of another embodiment of the composite insulation of the present invention,
FIGS. 6 and 7 are conceptual diagrams showing a manufacturing process using a molding apparatus for manufacturing the composite insulation of FIG. 5;
8 is a cross-sectional view showing another embodiment of a molding die for manufacturing the composite heat insulating material of the present invention,
FIG. 9 is a conceptual diagram showing a process of manufacturing a composite thermal insulator through the molding die of FIG. 8. FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a composite thermal insulator according to an embodiment of the present invention and a method of manufacturing the same will be described in detail with reference to the accompanying drawings. The present invention is capable of various modifications and various forms, and specific embodiments are illustrated in the drawings and described in detail in the text. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing. In the accompanying drawings, the dimensions of the structures are enlarged to illustrate the present invention in order to clarify the present invention.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, the terms "comprises", "having", and the like are used to specify that a feature, a number, a step, an operation, an element, a part or a combination thereof is described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

Referring to FIG. 1, a composite thermal insulation material 100 according to the present invention includes a vacuum insulation material 110 and a cover part 120 surrounding the outer surface of the vacuum insulation material 110.

The vacuum insulating material 110 is a heat insulating material formed by vacuuming the inside to lower the thermal conductivity. The vacuum insulation material 110 can be classified into a product using a fused silica or glass wool. In the present invention, any kind of vacuum insulation material 110 can be used.

The vacuum insulator 110 is very important for maintaining the vacuum state of the vacuum insulator 110. The vacuum insulator 110 may be damaged during the storage, transportation, or construction of the vacuum insulator 110, The internal vacuum of the heat exchanger 110 may be released to deteriorate the heat insulating performance.

Therefore, the cover 120 is formed to cover the surface of the vacuum insulation material 110 and protect the vacuum insulation material 110 from external impacts.

The cover 120 is made of a foamed resin that surrounds the vacuum insulator 110. Expandable poly-styrene (EPS) is used as the foaming resin, and other foaming resin that can be molded to wrap the vacuum insulation material 110 may be applied.

In addition, the foaming resin for forming the cover 120 may be formed by foaming a foam raw material, wherein the foam raw material may be composed of expanded graphite, a binder, and polystyrene.

The polystyrene expands into expanded polystyrene to become a foam. Expansion graphite is contained in the expanded polystyrene together with the binder, so that the flame retardancy of the cover 120 can be increased.

The criteria for semi-combustible materials are as follows.

1) The time (s) in which the total heat release rate (MJ / ㎡) according to KS F ISO 5660-1 is less than 8 MJ / ㎡ and the heat release rate exceeds 200 kW / m2 continuously is less than 10 s, Passing room image Harmful cracks · Insulation without holes and melting.

2) Insulation with gas hazard action stoppage time (min: s) of 9 min or more in accordance with KS F 2271.

3) A semi-fireproof insulation suitable for 1) and 2) of the Ministry of Land, Infrastructure and Transport's Notification No. 2015-744,

When the foam material containing the expanded side edge is foamed to form the cover part, the flame retardant performance can be improved so that the performance of the cover part conforms to the standard of the semi-inflammable heat insulator.

The cover 120 is formed to surround the outside of the vacuum insulator 110 to prevent the vacuum insulator 110 from being damaged due to an external impact or from being scratched to release the internal vacuum.

FIG. 4 is a flowchart showing a method of manufacturing the composite thermal insulation material 100 according to the present invention.

The composite heat insulating material 100 of the present embodiment includes a step of preparing a mold for molding, a step of placing the vacuum insulating material 110 on the mold, a step of joining the mold, a step of filling the foam raw material 140 in the mold , Foam molding the foam raw material (140), cooling the molded product, and separating the mold and taking out the product.

The molding die 150 includes a first mold 151 and a second mold 152 capable of forming a cavity corresponding to the outer shape of the cover 120 surrounding the vacuum insulating material 110, The mold 151 and the second mold 152 are provided with a supply means (not shown) capable of supplying steam for foaming and molding the foam raw material 140.

The vacuum insulator 110 is placed on the first mold 151 in a state where the first mold 151 and the second mold 152 are separated from each other and then the first mold 151 and the second mold 152 . At this time, the support rod 130 can be attached to one side of the vacuum insulation member 110 so that the vacuum insulation member 110 can be positioned at the midpoint of the cavity, The vacuum insulator 110 may be supported on the inner circumferential surface of the first mold 151 so as to be spaced apart from the inner circumferential surface of the first mold 151 by a predetermined distance.

After the first mold 151 and the second mold 152 are coupled to each other, the foam material 140 is injected into the cavity formed by the molding die 150 and filled therein. The foam material 140 may be in the form of a bead having a predetermined diameter and may be in a state of being subjected to primary foaming through preliminary foaming before being injected into the forming die 150. However, It may be injected into the mold 150.

After the foam raw material 140 is injected, steam is supplied to the inside of the mold through the steam supplying means formed in the forming mold 150. The foaming raw material 140 contains 5 to 7 wt% of foaming agent When the steam is heated to a temperature higher than the softening temperature of the foam raw material 140, the resin is softened and at the same time, the steam penetrates into the bead as the foam raw material 140 at a high speed, thereby vaporizing and expanding the foaming agent.

When the foam raw material 140 is foamed by steam, the shape of the cover part 120 corresponding to the shape of the cavity by the molding die 150 is formed and the outer shape of the composite heat insulating material 100 surrounding the vacuum heat insulating material 110 is .

After the foam material 140 is foamed, the foam material is cooled. The cooling water may be supplied to the molding die 150 for cooling or the cooling water may be supplied through the supply line to which the steam is supplied or the cooling may be performed without opening the mold for a predetermined time have.

The step of cooling the molded body is intended to prevent a rapid temperature drop of the foamed molded cover part 120. When the mold is immediately opened immediately after the foaming, and the molded article is taken out, the temperature of the molded article is rapidly lowered, and the steam supplied to the inside is condensed, resulting in decompression and shrinkage of the molded article due to atmospheric pressure.

Accordingly, the molded article is gradually cooled to prevent shrinkage after taking out the molded article.

After cooling, the first mold 151 and the second mold 152 are separated from each other, and the composite heat insulating material 100 foam-molded so as to enclose the vacuum heat insulating material 110 is taken out from the mold.

As shown in FIG. 2, the molded composite heat insulating material 100 has a state in which the vacuum insulating material 110 is embedded in the cover 120, and the vacuum insulating material 110 is separated from the first mold 151 The molding is completed in a state where the support rod 130 installed so as to be supported is attached to the inside of the cover part 120.

FIG. 5 shows a second embodiment of a composite insulation 200 according to the present invention.

The composite heat insulator 200 of this embodiment also includes a vacuum insulator 210 and a cover 220 formed of a foam that surrounds the vacuum insulator 210.

The composite heat insulating material 200 of the present embodiment is formed by foaming and molding the cover part 220 and compressing it to reduce the volume of the cover part 220 and increase the elasticity of the cover part 220 so as to protect the vacuum insulator 210 .

In the present embodiment, a protection plate 230 is attached to one side of the vacuum insulation material 210. The function and role of the protection plate 230 will be described while explaining the manufacturing process of the composite insulation material 200 of the present embodiment .

6 and 7, a molding die 250 for manufacturing the composite heat insulating material 200 according to the present embodiment includes a first mold 251 and a second mold 252. The first mold 251, A pressing member 270 for pressing the cover 220 after molding is completed is provided so as to be movable up and down and a pressing driving unit 271 for moving the pressing member 270 forward and backward is provided.

The pressing driving unit 271 may be a hydraulic cylinder connected to the pressing member 270. The pressing member 270 may move the pressing member 270 to the inner space side of the cavity by a predetermined length, can do.

A support pin 260 for supporting the vacuum insulator 210 is vertically movably installed in the first mold 251 and includes a support pin driver 261 for driving the support pin 260 to advance and retreat, Respectively.

The support pin 260 is provided to guide the seating position of the vacuum insulation member 210 and to prevent the vacuum insulation member 210 from being damaged when the support pin 260 is mounted on the support pin 260. [ Is provided with a treble plate at a contact position in contact with the support pin 260. [ A guide groove 231 is formed in the protection plate 230 at a position where the support pin 260 is supported so that the end of the support pin 260 can be inserted into the guide groove 231, The seating position of the vacuum insulating material 210 can be easily guided by placing the heat insulating material 210 thereon.

The support pin 260 may be retracted in the course of the foaming process so that no separate members are drawn into the completed cover part 220.

The mold 250 of the present embodiment is configured such that the upper end of the support pin 260 is drawn into the guide groove 231 of the protection plate 230 while the first mold 251 and the second mold 252 are opened, After the heat insulating material 210 is placed on the support pin 260, the first mold 251 and the second mold 252 are engaged to close the mold.

Thereafter, the foam raw material 240 is injected and steam is supplied to foam-form the foam raw material 240.

The support pin 260 is separated from the vacuum insulation material 210 while being retreated downward by the support pin driving part 261 in the process of foam molding of the foam material 240. The foaming of the foam material 240 proceeds Therefore, the vacuum insulator 210 is not moved largely by the foaming raw material 240 while it is being foamed, but maintains the initial position, and the support pin 260 completely retreats to the outside of the second mold 252 and disappears from the cavity.

The vacuum insulator 210 can be positioned at the intermediate point of the cover 220 by the support pin 260 and the support pin driver 261 which can be retreated.

After the foam molding is completed, the pressing member 270 is advanced by the pressure driver 271 during cooling to compress the foamed molded cover part 220.

The foamed polystyrene applied to the foam increases the elasticity through the compression process and increases the bonding force between the foamed beads and the beads, so that a higher protection strength can be secured before compression. Therefore, when the composite insulation 200 of the present embodiment is applied to a use site such as a building site, the cover 220 can be broken or separated to minimize the exposure of the vacuum insulation 210 to the outside.

8 shows another embodiment of a forming mold 160 in which a composite insulating material 100 can be manufactured according to the method for manufacturing the composite insulating material 100 of the present invention.

The molding die 160 of the present embodiment includes an inner mold 161 and an outer mold 164 that surrounds the outer portion of the inner mold 161 and a support block 165 that can enter and advance into the inner space of the inner mold 161 ).

The inner mold 161 includes a first inner mold 162 and a second inner mold 163 which are coupled to each other to form a molding space. The first inner mold 162 and the second inner mold 163 Is formed with a plurality of steam supply holes passing through the inner circumferential surface and the outer circumferential surface.

The steam supply hole is formed to allow the steam supplied when the foaming material 140 is foam-molded into the inside, and the steam supply hole is formed in the steam supply hole so as to prevent the foaming material 140 from escaping from the inner mold 161 The diameter of the feed hole is formed to be smaller than the diameter of the foam raw material 140.

The outer mold 164 is formed on the outer side of the inner mold 161, and a predetermined space is formed between the inner mold 161 and the outer mold 164. Steam can be supplied through this spacing space, and cooling water for cooling after foaming can be supplied through this spacing space and the steam supply hole.

The support block 165 is installed to be able to enter and advance into the first inner mold 162.

The supporting block 165 is provided with a plurality of supporting blocks 165 which are formed so as to enter upward from the bottom of the first inner mold 162 and horizontally inward from the side of the first inner mold 162, The vacuum insulator 110 is mounted inside the inner mold 161 by the support block 165.

The mold is closed in the state where the vacuum insulator 110 is mounted on the support block 165 and the foam material 140 is injected into the molding space to fill the molding space with the foam material 140 and then the support block 165 And is drawn out through the block actuator 166 from the molding space.

Since the foaming material 140 is already filled in the molding space, the vacuum insulating material 110 can be maintained in a position centered on the cover 120 without being shifted to any side in the forming space. In this state, And the foaming raw material 140 is foam-molded.

After the foam molding is completed, the mold is opened after cooling, and the composite heat insulating material 100 is taken out. At this time, the support block 165 installed on the lower portion of the first inner mold 162 among the support blocks 165 can be taken out from the inner mold 161 have.

The composite heat insulation materials 100 and 200 of the present invention described above include the cover parts 120 and 220 which are formed of a foam covering the vacuum insulation materials 110 and 210 so that the risk of breakage of the vacuum insulation materials 110 and 210 is minimized, The life can be extended.

The description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features presented herein.

100: Composite insulation
110: vacuum insulator 120: cover part
130: support rod 140: foam raw material
150: Molding mold
151: first mold 152: second mold
160: Molding mold
161: inner mold 162: first inner mold
163: second inner mold 164: outer mold
165: support block 166: block actuator
200: Composite insulation
210: vacuum insulator 220: cover part
230: Shield plate 231: Guide groove
240: Foam raw material
250: forming mold
251: first mold 252: second mold
260: support pin 261: support pin driver
270: pressing member 271:

Claims (10)

delete delete delete Preparing a forming mold for forming the foaming resin;
Attaching a vacuum insulator to the inside of the molding die;
Injecting a foaming material capable of foaming into the molding die after closing the molding die;
Forming a cover part for wrapping the outside of the vacuum insulation material by supplying foam to the inside of the molding die to foam the raw material of the foam material,
A first mold and a second mold for forming the molding space in which the molding molds are coupled to each other and the vacuum insulating material is embedded and the cover portion is formed,
A support pin which is capable of entering or retracting into the molding space so as to support the vacuum insulator at a predetermined distance from the inner circumferential surface of the first mold or the second mold at one side of the first mold or the second mold,
And a support pin driver for driving the support pin to advance and retreat,
Wherein the support pin is formed so as to be separated from the vacuum insulation material at a time when the vacuum insulation material can be supported by the foam material in the process of foam molding the foam material and to escape from the molding space. .
delete 5. The method of claim 4,
The molding die
A pressing member formed on the first mold so as to be able to advance and retreat into the molding space;
Further comprising a pressure driver for driving the pressing member to advance and retreat.
delete 5. The method of claim 4,
Wherein the vacuum insulator has a protection plate attached to a contact position where the support pin contacts with the support pin to prevent damage by the support pin,
Wherein the protection plate is formed such that a contact position is drawn in a predetermined depth so as to guide a contact position where the support pin is supported.
Preparing a forming mold for forming the foaming resin;
Attaching a vacuum insulator to the inside of the molding die;
Injecting a foaming material capable of foaming into the molding die after closing the molding die;
And forming a cover part for wrapping the outside of the vacuum insulation material by blow molding the raw material of the foam by supplying steam to the inside of the molding die,
The molding die is provided with a support block which can enter into the molding space or move outwardly from the molding space,
Wherein the supporting block is in a state of entering the molding space in the step of preparing the molding die, the vacuum insulating material is seated in a supporting block in a state of entering the molding space,
Further comprising the step of injecting the foam raw material into the molding die and drawing the supporting block outward from the molding space of the molding die.
10. The method of claim 9,
Wherein the molding die includes an inner mold for forming the molding space and an outer mold surrounding an outer side of the inner mold and defining a predetermined space between the inner mold and the inner mold,
The inner mold includes a first inner mold and a second inner mold. The inner mold has steam supply holes having diameters smaller than the diameter of the foam material so that steam can flow into the molding space. The inner and outer circumferential surfaces And is formed so as to pass therethrough,
Wherein a plurality of the support blocks are formed so as to enter the molding space side through a lower portion and a side portion of the first inner mold,
A block actuator for advancing and retreating the support block is installed on the outer mold,
Wherein the steam is supplied through the space between the inner mold and the outer mold.

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