JPS6038524Y2 - insulation board - Google Patents

Description

[Detailed description of the invention] The present invention relates to insulation boards used in insulation containers such as fresh fish freezers, and the corners of the insulation boards are reinforced from the inside, so that when joining the insulation boards, it is possible to This has been improved to ensure firm fixation with screws.

When screwing an edge frame material to the end face of a panel made of synthetic resin foam as its main component, the screw insertion part of the panel is prone to tearing, which often causes problems such as the screws loosening afterwards. It is.

Therefore, the present invention proposes a heat insulating material that is popular as a panel material for use in heat-insulating containers, etc., that is, a plate made of a synthetic resin foam with open pores such as a styrene resin foam with closed cells or a synthetic resin foam with open pores such as a hard urethane resin. The above-mentioned problem has been solved by providing internal reinforcement means at the corners of the heat insulating board covered by the fiber-reinforced resin outer skin, and the feature of the present invention is shown in Figure 1 of the accompanying drawings. To explain with reference to the illustrated embodiment, for example, in a square or rectangular heat insulating board in which a board 1 made of styrene resin foam is covered with an outer skin 2 made of glass fiber reinforced resin, the top surface of the board 1 is A holder 3 made of the same material as the outer skin 2 is provided on one or the opposite corner of the corner, and a rigid structure is provided between the holder 3 and the inner surface of the outer skin 2. In addition to clamping the plate 4, the rigid plate 4 is provided with a screw hole 6 coaxially with the hole 5 drilled in the outer skin body 2.

In the above configuration, examples of the styrene resin that provides closed cells include styrene homopolymers, styrene and methacrylate copolymers, and polyethylene-modified polystyrene.

Among these, polyethylene-modified polystyrene is preferable because it provides heat insulation with high dimensional accuracy (Japanese Patent Application Laid-Open No. 1986-1999).
55088).

This polyethylene-modified polystyrene is
As described in Publication No. 97 and Publication No. 54-55088, styrene monomer 1 (M: It is produced by introducing a suspension polymer and subjecting it to suspension polymerization in the presence of a polymerization initiator.

Such modified polystyrene is presumed to be composite particles consisting of particles in which fine styrene polymer particles are dispersed in polyethylene resin particles, styrene-grafted polyethylene particles, polystyrene-grafted polyethylene particles, and the like.

Foams made by foaming these styrene resins with an expanding agent such as heptane or n-butane are foams having closed cells.

On the other hand, examples of foams having open pores include rigid urethane resin foams and foams obtained by curing an emulsion of a mixture of water and unsaturated polyester and then removing water.

Further, it is preferable to use a rigid metal plate such as an iron plate as the rigid plate 4, and this rigid plate 4 is buried together with the holder 3 in advance when the outer skin 2 is attached to the main body 1 during molding.

Therefore, the rigid plate 4 is immovably fixed between these members by integrally joining the plate body 1, the outer skin body 2, and the holding body 3 during molding.

Note that a plurality of holes 5 and screw holes 6 are provided at intervals on the outer skin body 2 and the rigid plate 4, respectively.

Next, a method for forming the heat insulating board of the present invention will be explained.

The heat insulating board of the present invention is made by placing a glass fiber mat on the cut surface of a foam whose corners have been cut, placing a rigid board on top of it, and covering six sides of this foam with another glass fiber mat. The product is inserted between a female mold forming a cavity that matches the shape of the desired product and a male mold provided with an inlet for unsaturated polyester resin, and the lower mold and upper mold are clamped.

After that, thermosetting unsaturated polyester resin liquid is injected into the resin injection machine at low pressure (2 to 5 to 9/cit).
), this liquid fills the glass fiber layer and 12
Cures in 2-10 minutes at 0-150°C.

After curing is completed, when the mold is removed from the mold, a mold is obtained in which the glass fiber reinforced resin outer skin is integrally attached to the foam plate, and the outer skin at the corner with the rigid plate is attached. The heat insulating board of the present invention can be obtained by drilling holes in the rigid board.

In addition, in the heat insulating board of the present invention, an L-shaped sheet molding compound (hereinafter referred to as SMC) is placed on the cut surface of the foam with cut corners, and a rigid board with holes is placed on top of this. A laminate in which the six sides of the foam were covered with another SMC was placed in a press mold heated to about 60-80°C, and then heated at a temperature of 80-150°C and a pressure of 10 to 50 kg/cm.
c7I! Press for 2 to 60 minutes under the conditions of
It is obtained by cooling the mold to ~80° C. and making holes in the outer shell corresponding to the holes in the rigid plate of the molding technique obtained by removing the mold from the mold.

Then, the styrene monomer of the unsaturated polyester resin that constitutes the SMC during the press molding or injected during the injection molding dissolves the polystyrene on the surface of the foam, and then with the help of a polymerization initiator. As the resin hardens, the foam and skin become tightly bonded together.

Furthermore, L-shaped SMC and S covering six sides of the foam
MC is FRP with a structure in which unsaturated polyester resin melted during press molding is compatible, and a rigid plate is attached after heating and hardening.
Becomes a product.

Note that when a synthetic resin foam with open pores, such as a rigid urethane resin foam or an unsaturated polyester resin foam, is used as the foam, the unsaturated polyester resin solution enters into the open pores of the foam, Since the resin hardened within the pores has an anchoring effect, the outer skin and the foam are firmly bonded together.

Next, a panel-type container manufactured using this heat insulating board will be explained.

In FIG. 2, the upper and lower surfaces 12, 13 and left and right side surfaces 14 and 15 of the container body 11 are formed by main heat insulating plates, and the back surface 16 is formed by a heat insulating plate without a holder and a rigid plate.

These five-sided members are frame-shaped frame members 17 having an L-shaped cross section and fitted on opposite corners of the upper and lower and left and right sides.
．． 18, and the connection is achieved by inserting the screws 19 inserted from above the edge frame material 17. The assembled state of the body 11 is strongly stable.

In addition, a rubber backing (not shown) is attached to the open surface (front) side of the container body 11 around its four peripheries, and a door 20 made of a panel similar to this heat insulating board is attached to this by a hinge 21 so that it can be opened and closed freely. Installation.

Note that the joint portion between the left and right side surfaces or the top and bottom surfaces and the back surface formed using this cross-sectional plate is formed into an L-shaped fitting portion 2a by an extension of the outer skin 2, as shown in FIG.

The present invention is as described above, and the corners of the heat insulating board where the screws are fixed are reinforced by two layers of glass fiber reinforced resin and a rigid board sandwiched between these two layers, and at the same time,
Since the fixed state of the rigid plate is also determined, it is possible to firmly fix the edge frame material etc. with screws, and it is compatible with the fact that the panels can be easily joined together and the joint state can be stable. Therefore, this heat insulating board is particularly effective as a component of panel-type containers.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention: Fig. 1 is a vertical perspective view, Fig. 2 is a partially cutaway perspective view showing the assembled state of the container body using the heat insulating plate, and Fig. 3 is a main part of the same. FIG. In the figure, 1 is a plate, 2 is a shell, 3 is a holder, 4 is a rigid plate, 5 is a hole, and 6 is a screw hole.

Claims (1)

[Scope of utility model registration request] A square or rectangular heat insulating board in which a plate made of a styrene resin foam having closed cells or a synthetic resin foam having open pores such as a hard urethane resin is covered with an outer skin made of glass fiber reinforced resin, as described above. A holder made of the same material as the outer skin is provided on one or the opposite corner side of the upper surface of the plate, and a rigid plate is provided between the holder and the inner surface of the outer skin. A heat insulating board characterized in that the rigid board is provided with a screw hole coaxially with the hole drilled in the outer skin.