JP2014031631A - Heat insulation panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat insulation panel with a flat surface, in which a surface of a base material is not provided with a swollen part made of an expanded heat insulation material.SOLUTION: In a heat insulation panel 1, a vacuum heat insulation material 21 is installed in a bottom surface 15a of a recess of a base material 10 having the recess 15 opened on one side, and an expanded heat insulation material 22 is molded by being injected into the periphery of the vacuum heat insulation material 21. Structurally, a sheet material 23 is interposed between the vacuum heat insulation material 21 and the expanded heat insulation material 22; a central part 23a of the sheet material 23 covers a surface (back surface 21a) corresponding to an opening 14 of the recess 15 of the vacuum heat insulation material 21 and four-sided parts 21b; and four-sided ends 23c of the sheet material 23 are brought into intimate contact with the bottom surface 15a of the recess.

Description

  The present invention relates to a heat insulating panel having a vacuum heat insulating material.

  Conventionally, a heat insulating panel is known in which a vacuum heat insulating material is disposed on the bottom of a recess of a base material constituting a surface material of a heat insulating panel, and a foam heat insulating material is injected and molded around the vacuum heat insulating material ( For example, see Patent Document 1).

  This type of heat insulation panel, after temporarily fixing the vacuum heat insulating material to the bottom of the recess of the base material, injecting a foam heat insulating material around the vacuum heat insulating material, foaming and curing the foam heat insulating material, It shape | molds by sticking a back surface material to a base material so that the hardened foam type heat insulating material may be plugged up.

JP 2008-95423 A

  However, since the foam heat insulating material is injected with the vacuum heat insulating material temporarily installed in the bottom of the recess of the base material, if there is a slight gap between the vacuum heat insulating material and the base material, the gap In some cases, foam-based heat insulating material may enter.

  If the foam heat insulating material enters the gap between the vacuum heat insulating material and the base material in this way, the surface portion of the base material swells to the surface side due to subsequent foaming and curing of the foam heat insulating material, resulting in poor appearance. There is a risk.

  The present invention has been proposed in view of such circumstances, and an object of the present invention is to provide a heat insulating panel having a flat surface without a bulging portion due to a foamed heat insulating material on the surface.

  In order to achieve the above object, the heat insulation panel according to the present invention is provided with a vacuum heat insulating material on the bottom surface of a recess having a recess opened on one side, and a foam-based heat insulation around the vacuum heat insulating material. In the heat insulation panel formed by injection molding of the material, the sheet material is interposed between the vacuum heat insulating material and the foam heat insulating material, and the central portion of the sheet material corresponds to the opening of the recess of the vacuum heat insulating material. The structure is characterized in that the surface and the four circumferential side portions are covered and the four circumferential end portions of the sheet material are in close contact with the bottom surface of the recess.

  In the present invention, a large number of holes are formed in a portion covering the surface corresponding to the opening of the recess of the vacuum heat insulating material of the sheet material.

  According to the heat insulation panel which concerns on this invention, by setting it as the above-mentioned structure, the swelling by a foam type heat insulating material can be prevented on the surface of a base material, As a result, the surface can be made flat.

It is the longitudinal cross-sectional view and enlarged partial longitudinal cross-sectional view of the heat insulation panel which concern on embodiment of this invention. It is a disassembled perspective view of the heat insulation panel (except a foaming-type heat insulating material and a back surface material).

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  1 and 2 are explanatory views of the heat insulation panel of the embodiment. FIG. 1 is a longitudinal sectional view and an enlarged partial longitudinal sectional view of a heat insulating panel, and FIG. 2 is an exploded perspective view of a heat insulating panel (excluding a foam-based heat insulating material and a back surface material).

  As shown in FIG. 1 and FIG. 2, the heat insulation panel has a substantially flat plate shape. As shown in FIG. 1, the heat insulating panel 1 includes a base material 10 having frame portions 12 at both end portions in the width direction, a back material 25 attached to the back side of the base material 10, and the base material 10. A vacuum heat insulating material 21 accommodated in the recess 15 and a foam heat insulating material 22 filled in the periphery thereof are provided.

  The heat insulating panel 1 is a building material panel used for wall panels, floor panels, ceiling panels, and the like. The heat insulation panel 1 is constructed by fixing the back material 25 side to a construction object such as a wall foundation, a floor foundation, or a ceiling foundation.

  You may make it set the width dimension and length dimension of this heat insulation panel 1 suitably according to the object etc. in which the heat insulation panel 1 is used. For example, when the heat insulation panel 1 is used as an interior building material, the width dimension may be about 300 mm to 900 mm, and the length dimension may be about 900 mm to 2400 mm.

  Moreover, you may make it set the thickness dimension of this heat insulation panel 1 suitably according to the object for which the heat insulation panel 1 is used, the heat insulation required, etc. For example, when the heat insulation panel 1 is used as an interior building material, the thickness dimension of the base material 10 may be about 10 mm to 30 mm, and the thickness dimension of the back material 25 may be about 0.01 mm to 1 mm.

  The base material 10 is formed by covering the front and back of the metal plate 10a with resin layers 10b and 10b. As the metal plate 10a, for example, a steel plate is used. The thickness dimension of the metal plate 10a is, for example, about 0.15 mm. In addition, as a steel plate, a galvanized steel plate, a coated steel plate, a tin-plated steel plate, etc. may be used. Further, the metal plate 10a is not limited to a steel plate, and other metals may be used.

  The resin layers 10b and 10b are made of a synthetic resin such as vinyl chloride. The resin layers 10b and 10b cover the front and back of the metal plate 10a to form the surface layer and the back surface layer of the base material 10. The thickness dimensions of the resin layers 10b and 10b on either the front surface side or the back surface side are, for example, about 0.15 mm to 0.5 mm.

  The synthetic resin constituting the resin layers 10b and 10b may be a thermoplastic resin or a thermosetting resin. The synthetic resin is not limited to vinyl chloride, and other synthetic resins may be used.

  Thus, by providing the resin layers 10b and 10b on the front and back of the metal plate 10a of the base material 10, generation of rust can be prevented. Moreover, since the vacuum heat insulating material 21 is installed on the resin layer 10b on the back surface, the vacuum heat insulating material 21 can be protected. In addition, the base material 10 may not be the layer structure by the metal plates 10a and the resin layers 10b and 10b as described above, and the material thereof is not particularly limited, and may be manufactured using various materials. .

  The base material 10 has a concave groove structure having a surface portion 11 having a substantially flat plate shape and a frame portion 12 including a side end edge portion 12a and a back side edge piece portion 12b.

  The side edge portion 12 a is formed so as to rise in the thickness direction of the heat insulating panel 1 from both ends of the surface portion 11 in the width direction. The back side edge piece 12b is formed so as to protrude from the end on the back side (upper end in the figure) of the side edge 12a so as to narrow the opening width. Thus, the base material 10 is formed with a recess 15 having the back surface side of the heat insulating panel 1 opened and the back surface of the surface portion 11 as the bottom surface.

  The base material 10 may be formed integrally with the surface portion 11, the side edge portion 12a, and the back side edge piece portion 12b. The base material 10 may be formed by extrusion molding of two colors of metal and synthetic resin. In addition, the shaping | molding method of the base material 10 is not specifically limited.

  As shown in FIG. 2, the vacuum heat insulating material 21 has a substantially rectangular flat plate shape, and has a size that can be accommodated in the space of the recess 15 surrounded by the base material 10 and the back surface material 25. Further, the vacuum heat insulating material 21 is disposed in a state where one surface (surface) in the thickness direction thereof is brought into close contact with the center in the width direction and the longitudinal direction of the recess bottom surface 15 a of the base material 10.

  The vacuum heat insulating material 21 may be formed by vacuum-sucking the core material with a gas barrier packaging material. As a core material, it is good also as what consists of foams, such as an open-cell urethane foam using a material with comparatively low heat conductivity, a styrene foam, a phenol foam. Alternatively, as the core material, it may be made by pulverizing various foam materials, or it may be made of powder particles such as silica, alumina, pearlite, etc. Also good. Furthermore, you may make it mix and use the above-mentioned various foams, a granular material, and a fiber body as a core material. The packaging material may be a metal film having gas barrier properties. Alternatively, a laminate having a protective layer such as a resin film on the outer layer side, a gas barrier layer such as a metal film or a metal vapor deposition layer in the middle, and a heat welding layer such as a resin film having heat weldability on the inner layer side (core material side) A film (sheet) may be used as a packaging material.

  A sheet material 23 is interposed between the vacuum heat insulating material 21 and a foamed heat insulating material 22 described later on the back surface 21a and the four circumferential side portions 21d of the vacuum heat insulating material 21. The sheet material 23 is made of a substantially rectangular flexible resin sheet material larger than the planar size of the vacuum heat insulating material 21, and is disposed in a state where the sheet material 23 is bent along the shape of the vacuum heat insulating material 21. A large number of holes 23b, 23b,... Are formed in the central covering portion 23aa of the central portion 23a of the sheet material 23. The dimensions of the holes 23b, 23b,... Are such that the foaming heat insulating material 22 before foaming injected into the recess 15 when the heat insulating panel 1 is manufactured can pass therethrough.

  The sheet material 23 covers the surface (back surface 21 a) corresponding to the opening 14 of the recess 15 of the vacuum heat insulating material 21 at the center covering portion 23 aa of the center portion 23 a. Further, the peripheral portion 23ab of the central portion 23a is bent to cover the four-circumferential side portion 21b of the vacuum heat insulating material 21. Further, the four circumferential end portions 23c of the sheet material 23 are in close contact with the recess bottom surface 15a. In addition, it is desirable to mark the boundary between the central covering portion 23aa and the peripheral portion 23ab of the sheet material 23 so that the positioning with respect to the vacuum heat insulating material 21 can be easily performed in the manufacturing process of the heat insulating panel 1 described later. .

  Further, the central portion 23 a of the sheet material 23 is in close contact with the back surface 21 a and the four-circumferential side portion 21 b of the vacuum heat insulating material 21 so as to be pressed against the surrounding foam heat insulating material 22. In particular, on the back surface 21a of the vacuum heat insulating material 21, the foam heat insulating material 22 enters the gap S between the sheet material 23 and the vacuum heat insulating material 21 through the hole 21b in the manufacturing process described later, and the foam heat insulating material 22 is vacuum heat insulating. The back surface 21a of the material 21 and the sheet material 23 are bonded to each other.

  The back material 25 is stuck to the back side edge piece 12b so as to close the opening 14 of the base material 10. As the back material 25, a material made of a metal material, a synthetic resin material, an inorganic material, or the like is used. Further, a paper material such as a metal sheet, a resin sheet, or calcium carbonate paper may be used as the back surface material 25. The foamed heat insulating material 22 that is foamed and hardened is filled in the portion excluding the vacuum heat insulating material 21 in the recess 15 of the base material 10 whose opening 14 is blocked by the back surface material 25.

  The foam heat insulating material 22 may be a foamed resin material in which a synthetic resin such as urethane resin, polystyrene resin, polyethylene resin, or phenol resin contains a foaming agent, and a curing agent or a flame retardant as necessary. . Further, as the foam heat insulating material 22, a foam rubber material or an inorganic foam material made of calcium carbonate or the like as a raw material may be used. In the present embodiment, the foamed heat insulating material 22 is hard foamed urethane. As the rigid foamed urethane, it is desirable to use a rigid isocyanurate foam excellent in flame retardancy.

  Such a heat insulation panel 1 is a process of installing a vacuum heat insulating material 21 while a long material, which is a material before molding (cutting) of the base material 10, is transported through a conveyance line (not shown), a foam heat insulating material. It can manufacture by making 22 injection | pouring and hardening processes, the sticking process of the back material 25, and a cutting process in order. In addition, the transfer direction of the base material 10 is a longitudinal direction of the heat insulation panel 1 as shown by the white arrow of FIG. Moreover, it is desirable that the vacuum heat insulating material 21 is not only placed but also temporarily fixed with an adhesive tape (not shown).

  In this manufacturing process, the foam heat insulating material 22 is injected around the vacuum heat insulating material 21 installed on the recess bottom surface 15 a of the base material 10. At that time, the sheet material 23 does not need to be in close contact with or adhered to the vacuum heat insulating material 21 and the surrounding recess bottom surface 15a, and the center covering portion 23aa of the central portion 23 is aligned with the back surface 21a of the vacuum heat insulating material 21. Just put it on. Then, the sheet material 23 is pressed downward or laterally by the foaming pressure of the foamed heat insulating material 22 injected, and is in close contact with the back surface 21a, the four circumferential side portions 21b of the vacuum heat insulating material 21 and the surrounding recess bottom surface 15a. You can make it.

  In particular, since the center covering portion 23aa of the sheet material 23 is provided with a large number of holes 23b, 23b,..., The foam heat insulating material 22 is connected to the sheet material 23 through the holes 23b, 23b,. It enters between the back surface 21 a of the vacuum heat insulating material 21. The sheet material 23 is bonded to the back surface 21 a of the vacuum heat insulating material 21 by the curing of the foam heat insulating material 22. These numerous holes 23b, 23b,... Are for interposing the foam-based heat insulating material 22 between the sheet material 23 and the back surface 21a of the vacuum heat insulating material 21, but the surface of the vacuum heat insulating material 21. It is desirable not to be formed in the peripheral portion 23ab of the central portion 23a of the sheet material 23 so as not to reach the side. For the same reason, it is desirable not to provide the hole 23b as much as possible in the outer peripheral portion of the central covering portion 23aa of the central portion 23a.

  As described above, when the foam heat insulating material 22 is injected into the recess 15, the foam heat insulating material 22 before foaming causes the sheet material 23 to be in close contact with the bottom surface 15 a of the recess. It is possible to prevent the material 10 from entering the gap between the bottom surface 15a of the recess. As a result, the surface portion 11 of the base material 10 is not formed with a bulging portion protruding to the surface side by the foamed heat insulating material 22, and it is possible to prevent a poor appearance.

DESCRIPTION OF SYMBOLS 1 Heat insulation panel 10 Base material 14 Opening 15 Recess 15a Recess bottom surface 21 Vacuum heat insulating material 21a Back surface 21b Four circumference side parts 22 Foaming type heat insulating material 23 Sheet material 23a Center part 23b Hole 23c Four circumference edge part 25 Back surface material

Claims (2)

In a heat insulating panel formed by installing a vacuum heat insulating material on the bottom surface of the concave portion of the base material having a recess opened on one side, and injecting and molding a foam heat insulating material around the vacuum heat insulating material,
A sheet material is interposed between the vacuum heat insulating material and the foam heat insulating material,
The center portion of the sheet material covers the surface corresponding to the opening of the recess of the vacuum heat insulating material and the four circumferential side portions, and the four circumferential end portions of the sheet material are in close contact with the bottom surface of the recess. Thermal insulation panel characterized by In claim 1,
A heat insulating panel in which a large number of holes are formed in a portion of the sheet material covering a surface corresponding to the opening of the first recess of the vacuum heat insulating material.

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