JP3631846B2 - Thermal insulation waterproof panel - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a heat insulating waterproof panel that is attached to a wall, floor, ceiling, etc. of a general building, a heat storage layer, a freezer warehouse, etc., or used for a lid or box of a machine that requires heat insulation or waterproof.
[0002]
[Prior art]
The present applicant has previously proposed a heat insulating waterproof panel in which the whole heat insulating material made of a foam is covered with a waterproof skin material. The skin material was composed of a box-shaped and hollow panel body in which a resin material was blow-molded, and the resin material was foamed inside the panel body to fill the heat insulating material.
[0003]
[Problems to be solved by the invention]
When blown panel body is molded by blow of air, blown panel body is stretched most by the blowing pressure of resin at the edge, especially in the case of rectangular shape, the corners are stretched In this state, it is cooled and solidified. When the resin material is foamed inside the panel body at the same time as blow molding or after blow molding, high-temperature water vapor of 120 ° C. to 140 ° C. is used for foaming. The resin at the edges and corners of the panel body was pulled to the center, and the corners were rounded. In the case where dimensional accuracy is required for the heat-insulating waterproof panel, it is not useful if the edge of the panel body is deformed as described above. Insulation-filled blow molded products that do not require dimensional accuracy, such as buoys, chopping boards, and lids may be deformed at the edges, but if some dimensional accuracy is required, a resin material that molds the panel body Fillers such as talc and calcium carbonate were mixed in to reduce the degree of edge deformation. Even such a blow-molded product containing a filler has not been used because it requires a higher dimensional accuracy for construction and the like.
[0004]
Therefore, an object of the present invention is to provide a heat insulating waterproof panel with improved dimensional accuracy.
[0005]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the present invention is a heat-resistant waterproof panel formed by foam-molding a resin material inside a hollow panel body hollow-molded with a resin material. In the vicinity of the edge and along the edge, continuous grooves that are recessed inward are formed.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Preferred embodiments of the present invention will be described below with reference to the drawings.
[0007]
In the embodiment shown in FIG. 1, a continuous groove 2 is provided in the vicinity of an edge 1A of a hollow box-shaped panel body 1 blow-molded with a resin material and recessed inward along the edge 1A. The groove 2 is formed not only on the front surface of the panel body 1 but also on the back surface. The distance L from the edge 1A of the groove 2 is preferably about 5 to 20 mm, and the width w of the groove 2 is preferably about 5 to 10 mm. As a resin material for molding the panel body 1, polypropylene, polyethylene, ABS, or the like can be suitably used. The thickness of the panel body 1 which is a blow molded product is preferably 0.2 to 7 mm, and preferably 0.5 to 4 mm in consideration of the balance between strength and weight.
[0008]
FIG. 2 is a cross-sectional view taken along line AA of FIG. 1, and a heat insulating material 3 is filled in the hollow interior of the hollow box-shaped panel body 1 formed by blow molding a resin material. The heat insulating material 3 is filled by injecting the heat insulating material 3 simultaneously with blow molding of the panel body 1 or after blow molding, or by foaming beads that are the material of the heat insulating material 3 inside. As the heat insulating material 3, foams such as polyurethane, polypropylene, polyethylene, polystyrene, and ABS can be suitably used. The thickness of the heat insulating material 3 is determined according to the required heat insulating performance. In FIG. 2, the depth d of the groove 2 is shown, and the depth d is preferably about 5 to 10 mm.
[0009]
In the embodiment shown in FIGS. 1 and 2, when the panel body 1 is blow-molded, a hole for insertion such as a bolt may be formed so as to penetrate from the front surface to the back surface. The heat insulating waterproof panel can be attached to the wall surface through a bolt or the like embedded in the wall surface in this hole. Alternatively, a female screw can be embedded in the wall surface, and a bolt to be screwed into the female screw when the panel body 1 is molded can be inserted. Furthermore, it is also possible to attach a panel by making a hole in the wall surface with a drill and inserting a fixture into this hole.
[0010]
When the panel body 1 is blow-molded, beads as a raw material for the heat insulating material 3 are introduced into the hollow interior and foamed. Since the resin is heated with water vapor, the portion of the groove 2 blocks the flow of the resin toward the center of the panel due to secondary contraction that occurs when it is cooled, and the heat-insulated waterproof panel completed after cooling is The shape of the edge 1A is finished with a predetermined dimensional accuracy.
[0011]
FIG. 3 is a cross-sectional view when the groove 2 is formed only on the surface of the panel body 1, and the edge 1 </ b> A on the back surface side of the panel body 1 where the groove 2 is not formed is like a rounded corner portion C. Will be deformed. Moreover, in the groove | channel formed intermittently instead of the continuous groove | channel 2, the corner | angular part of the part in which the groove | channel is not formed will deform | transform similarly to the corner part C shown in FIG.
[0012]
Due to the nature of blow molding, the corners are most stretched with resin, and as a result of cooling, there is residual stress in the portions. When secondary heat by foaming is applied to such a part, the resin in the part is released by the residual stress and contracts, and tries to leave the corner. When such secondary contraction occurs, since the groove 2 is in the vicinity of the edge 1A, the movement of the resin is prevented and the resin is cooled and solidified while maintaining the shape of the corner, and the secondary contraction is completed. The size and position of the groove 2 are preferably within the above-described range, but it is natural that they also vary depending on the size of the panel body 1 and the like. Moreover, the effect was recognized even if the distance L was separated to some extent.
[0013]
【The invention's effect】
As described above, according to the present invention, the continuous grooves recessed inwardly along the edges of the front and back surfaces are formed at the time of blow molding of the panel body. The secondary shrinkage of the main body prevents the edge of the panel main body from being deformed. Therefore, it is possible to provide a heat insulating waterproof panel with improved dimensional accuracy.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a preferred embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along line AA in FIG.
FIG. 3 is a cross-sectional view when a groove is formed only on one side.
[Explanation of symbols]
1 Panel body 1A Edge 2 Groove 3 Thermal insulation

Claims (2)

A heat insulating waterproof panel formed by foam molding of a resin material inside a hollow panel body blow-molded with a resin material,
A heat-insulating waterproof panel, wherein continuous grooves are formed in the vicinity of the front and back edges at the time of blow molding of the panel body and are recessed inward along the edges. The groove formed on the front and back surfaces of the panel body is formed at a position of 5 to 20 mm from the edge of the front and back surfaces, and the depth of the groove is 5 to 10 mm and the width is 5 to 10 mm. Item 2. The heat insulating waterproof panel according to Item 1.

Images