JPH0448427Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a duct forming board used for forming air conditioning ducts, ventilation ducts, etc.

[Conventional technology]

Conventional air conditioning and ventilation ducts are made by bending and welding steel plates into a box shape to form the duct body, covering the outside of the duct body with a heat insulating material such as glass wool, rock wool, or expanded polystyrene. It was constructed by covering the outside of the material with an exterior material made of a composite sheet material of glass cloth and thin aluminum film.

[Problem that the invention attempts to solve]

However, when configuring the duct as described above, it is necessary to form the duct body by bending and welding steel plates, cover the outside of the duct body with heat insulating material, and apply the exterior material. There were problems such as it took a very long time to manufacture the duct, and the cross-sectional structure of the duct had a three-layer structure of steel plate, heat insulation material, and exterior material, making it heavy and costly. .

[Means for solving problems]

The duct forming board of the present invention, which solves the above-mentioned conventional problems, is a rigid foam board that has excellent mechanical strength and heat insulation properties, and has an appropriate thickness that shows little volume change and does not become brittle even when exposed to high temperatures. An exterior material made of a composite sheet material of glass cloth and aluminum thin film is attached to the entire outer surface of the body.

[Effect]

According to the duct forming board having the above configuration, this board is cut to an outer shape according to the developed planar shape of a predetermined duct to be manufactured, and the board is cut to a predetermined cross-sectional dimension on the inner surface side located on the hard foam board body side of the outer cut board. a stepped notch on the inner surface of one end for forming a V-shaped groove so that the board can be bent into a box shape, and a concave-convex fitting part for duct connection at both lengthwise ends of the board; and the stepped notch on the outer side of the other end is cut, and the stepped notch on the inner side for forming a box closing joint surface on one side of the board is cut to form the V-shaped groove. By applying adhesive to the cut surface and the stepped notch surface on one side of the board, bending the board into a box shape, and gluing it together, a duct with a desired cross-sectional dimension can be manufactured more easily and with better workability than before. be able to.

In addition, the cross-sectional structure of ducts made from this board has a two-layer structure consisting of a hard foam board and an exterior material, making it light in weight and low in cost.In addition, due to the characteristics of the hard foam board, it has mechanical strength. It has excellent thermal insulation properties, and its volume hardly changes even when exposed to high temperatures, and there are no problems such as cracking or collapse.

〔Example〕

An embodiment of this invention will be described below with reference to FIG. 1. This duct-forming board has excellent mechanical strength and heat insulation, has a suitable thickness ( For example 15mm
An exterior material 2 made of a composite sheet material of a glass cloth 2a and an aluminum thin film 2b is pasted over the entire surface of a hard foam board 1 having a thickness of The method disclosed in Japanese Patent Publication No. 52-26776 is used, that is, wet powder A is obtained by adding an organic solvent to an inorganic powder and moistening it.
Separately, a mixture of vinyl chloride resin powder and an inorganic fiber agent is designated as B, the wet powder A and mixture B are mixed, an organic solvent and butane chloride are added to this mixture, and a sol-like product is prepared by a conventional method. It was obtained by a manufacturing method of foam molding.

FIG. 2 shows a duct made from the duct forming board having the above structure, and this duct 10 is manufactured as follows.

That is, the duct forming board of the present invention is cut into an outer shape as shown in FIG. , a V for allowing the board P to be bent into a box shape with a predetermined cross-sectional dimension as shown by the imaginary line in FIG.
Stepped grooves 3a, 3b, and 3c are formed on the inner surface of one end of the board P, and grooves 3a, 3b, and 3c are formed on both ends of the board P in the longitudinal direction to form concave-convex fitting portions 4 and 5 for duct connection as shown in FIG. The notch 4a and the stepped notch 5a on the outer side of the other end are cut, and the stepped notch 6a on the inner side for forming the box closing joint surface 6 on one side of the board P is cut. Then, apply adhesive (not shown) to the cut surfaces of the V-shaped grooves 3a to 3c and the stepped notch 6a on one side of the board, and fold the board P into a box shape as shown in the imaginary line in FIG. By bending and bonding, a duct 10 having a desired cross-sectional dimension as shown in FIG. 2 can be manufactured.

[Effect of idea]

Since the duct forming board of this invention is as described above, it is possible to manufacture a duct with a desired cross-sectional size more easily and with better workability than before, and the duct 10 manufactured from this board
has a two-layer cross-sectional structure consisting of a hard foam board body 1 and an exterior material 2, and is light in weight and low in cost.Moreover, due to the characteristics of the hard foam board body 1, it has excellent mechanical strength and heat insulation properties. Even when exposed to high temperatures, the volume hardly changes, and problems such as cracking and collapse do not occur.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of the essential parts of the duct-forming board of the present invention, Figure 2 is a perspective view of an air conditioning and ventilation duct made from this board, and Figure 3 is a cutout for making this duct. top view of the board,
4 is a right side view of FIG. 3, and FIG. 5 is a bottom side view of FIG. 3. 1... Rigid foam board body, 2... Exterior material, 2a
...Glass cloth, 2b...Aluminum thin film.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) On the outer surface of a rigid foam board that has excellent mechanical strength and heat insulation properties, exhibits little volume change and does not become brittle even when exposed to high temperatures, and has an appropriate thickness,
A board for forming ducts with an exterior material made of a composite sheet of glass cloth and aluminum thin film pasted over the entire surface. (2) The rigid foam board is made by adding an organic solvent to an inorganic powder and moistening it to make a wet powder A, separately mixing a vinyl chloride resin powder and an inorganic fiber agent to make a mixture B, and combining the wet powder A and the mixture B. The product is obtained by foam-molding a sol-like product obtained by adding an organic solvent and liquefied butane to the mixture and foam-molding it by a conventional method. Board for forming ducts.