JPH0647750A - Production of siding board by vacuum foam molding - Google Patents

Abstract

PURPOSE:To simultaneously produce a siding board of high quality in large quantities inexpensively and efficiently within a short time with extremely high productivity. CONSTITUTION:A resin foamable material 2 is supplied to the rear surface of a siding material processed into an appropreate predetermined shape and a sheet like material 3 is fixed to the resin foamable material 2. The siding material 1, the resin foamable material 2 and the sheet like material 3 are together introduced into a vacuum region held to required temp. and the resin foamable material 2 is foamed in the vacuum region to fill the space part between the rear of the siding material and the rear of the sheet like material in a foamed and cured state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a siding board useful as an exterior material for buildings and structures, and in particular, a resin foam material for heat insulation or sound insulation is foamed and cured on the back surface of the siding material in a short time. The present invention relates to a siding board manufacturing method capable of filling and fixing and capable of simultaneously mass-producing high quality siding boards with extremely high productivity.

[0002]

2. Description of the Related Art Conventionally, as a method for manufacturing a siding board of this kind, as shown in, for example, Japanese Patent Laid-Open No. 55-37306, (a) foaming is applied to the inner surface of a surface material whose right and left ends are slightly bent inward. First step of pouring a synthetic resin stock solution,
(B) a second step of bringing a back surface material wider than the front surface portion of the surface material into contact with the foamable synthetic resin stock solution, and (c)
Third step of folding the left and right end portions of the back surface material inside the left and right end portions of the surface material while foaming the foamable synthetic resin stock solution
And a fourth step of bending the left and right end portions of the surface material further inward to a predetermined angle (d).

[0003]

By the way, in such a method for manufacturing a siding board, in the third step, the left and right ends of the back surface material are left and right of the surface material while foaming the expandable synthetic resin stock solution. It takes time to fill the foamable synthetic resin undiluted solution between the surface material and the back surface material because it is folded inside the end of the, and the adhesion is poor due to the relationship of this foaming time. Voids are likely to occur, and because the bonding is incomplete, it is brittle against fire and fire resistance, and lacks heat insulation.
It has drawbacks such as waterproofness and vibration resistance, and significantly impairs the quality and productivity of the siding board.

[0004]

The method for producing a siding board by vacuum foam molding of the present invention aims to solve the above-mentioned problems, and a resin foam material is appropriately formed on the back surface side of a siding material processed into a predetermined shape. Then, the sheet-shaped material is fixed to the resin foam material side, and the siding material, the resin foam material, and the sheet-shaped material are put together in a decompression region of a required temperature, and the resin foam material is foamed in this decompression region. By doing so, the space between the back surface of the siding material and the back surface of the sheet-shaped material is foam-hardened and filled with the resin foam material.

[0005]

1 to 4 are views showing a preferred embodiment of a method for producing a siding board by vacuum foam molding according to the present invention, and FIG. 1 is a cross section showing a first step in the production method according to the present invention. FIG. 2, FIG. 2 is a cross-sectional view showing the second step, FIG. 3 is an explanatory view showing the third step in the decompression region of the required temperature, and FIG.
FIG. 3 is a cross-sectional view of a siding board manufactured by the method for manufacturing a siding board by vacuum foam molding of the present invention.

In the first step of the manufacturing method of the present invention shown in FIG. 1, a predetermined amount of the resin foam material 2 is supplied to the back surface 1a side of the siding material 1 which has been previously processed into a predetermined shape. The siding material 1 serves as a surface material, for example, a colored zinc iron plate, a steel plate coated with vinyl chloride, a tin plate, a galvanized iron plate, aluminum whose surface is anticorrosion-treated or coated with a synthetic resin, a steel plate, etc. It is composed of. Its thickness is approximately 0.2 mm-1 m
m is desirable. The resin foam material 2 is generally made of a hard resin such as polyurethane, polyisocyanurate, polyimide, phenol or epoxy, but may be semi-hard or soft.

Next, in a second step shown in FIG. 2, the sheet-like material 3 is appropriately fixed to the siding material 1 supplied with the resin foam material 2 from the back surface 1a side of the siding material 1. As the fixing means, both may be fixed with an adhesive, or the end portion of the siding material 1 may be fixed to the sheet-shaped material 3
Both ends may be folded inward and fixed to each other. The sheet material 3 serves as a back surface material, and for example, kraft paper, asphalt paper, polyethylene-processed kraft paper, aluminum foil paper, or the like is used.

Next, in the third step shown in FIG. 3, the unfinished product 4 consisting of the siding material 1, the resin foam material 2 and the sheet material 3 shown in FIG.
And the resin foam material 2 is foamed in the depressurized area 5, so that the resin foam material 2 can be kept in the space 6 between the back surface 1a of the siding material 1 and the back surface 3a of the sheet-shaped material 3 for a short time. The product is foamed, hardened and filled, and the finished product 4a of the siding board as shown in FIG. 4 is taken out from the decompression region 5 at the required temperature. Reference numeral 7 is a decompression pump connected to the decompression region 5 of the required temperature, and the decompression degree of the decompression region 5 of the required temperature can be adjusted appropriately. In this embodiment, the degree of pressure reduction is set to approximately 576 mm.
Hg to approximately 504 mmHg.

As described above, when the non-finished product 4 is put in the decompression region 5 of the required temperature, the foaming rate increases regardless of the type of the resin foam material 2 and the shape of the siding material 1, and this siding material Since all corners of 1 are uniformly foam-hardened and filled, the siding material 1, the resin foam material 2 and the sheet-like material 3 are integrally molded with extremely good adhesion, and a siding board of good quality can be manufactured in a short time ( It is about 20 to 30% faster than the conventional method.), And can be efficiently manufactured at low cost.

If, for example, the decompression region 5 having a large volume and a required temperature is used, many unfinished products 4 can be decompressed at one time, and high quality siding boards can be mass-produced at the same time with extremely high productivity. It can be manufactured.

Next, a method of manufacturing a siding board by vacuum foam molding of the present invention will be described. First, after supplying the resin foam material 2 to the back surface 1a side of the siding material 1 which has been appropriately processed into a predetermined shape, the sheet material 3 is fixed to the resin foam material 2 side to form the unfinished product 4, and these siding materials are used. By introducing a non-finished product 4 composed of the material 1, the resin foam material 2, and the sheet-like material 3 into the decompression region 5 of the required temperature, and foaming the resin foam material 2 in the decompression region 5.
The space 6 between the back surface 1a of the siding material 1 and the back surface 3a of the sheet-shaped material 3 is filled with the resin foam material 2 by foaming, hardening and filling, and the finished product 4a of the siding board is integrally molded. 4a is taken out from the reduced pressure area 5 at the required temperature.

[0012]

According to the method for producing a siding board by vacuum foam molding of the present invention, a resin foam material is supplied to the back surface side of a siding material which is appropriately processed into a predetermined shape, and a sheet-shaped material is provided on the resin foam material side. The siding material, the resin foam material, and the sheet-like material are put together in a decompression region at a required temperature, and the resin foam material is foamed in this decompression region, whereby the back surface of the siding material and the sheet-like material are formed. Since the resin foam material is foamed and hardened and filled in the space with the back surface of the material, this resin foam material is filled evenly in every corner of this siding material regardless of the type of the resin foam material and the shape of the siding material. However, the siding material, the resin foam material, and the sheet-shaped material are integrally molded with extremely good adhesion, and a siding board with good quality can be manufactured efficiently in a short time at low cost. An effect that can be granulated.

Further, since many unfinished products can be processed under reduced pressure at the same time if they are manufactured by putting them in a reduced pressure area having a large volume at a required temperature, a large amount of high quality siding boards can be produced at the same time with extremely high productivity. There is also an effect that it can be manufactured.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a first step in a preferred embodiment of a method for producing a siding board by vacuum foam molding of the present invention.

FIG. 2 is a sectional view showing the second step.

FIG. 3 is an explanatory view showing the third step.

FIG. 4 is a cross-sectional view of a siding board manufactured by the manufacturing method of the present invention.

[Explanation of symbols]

 1 siding material 1a back surface of siding material 1 resin foam material 3 sheet material 3a back surface of sheet material 4 unfinished product of siding board 4a finished product of siding board 5 decompression area 6 space 7 decompression pump

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yuji Nomura 3-22 Matsubara, Soka-shi, Saitama C-22-401

Claims (1)

[Claims] 1. A resin foam material is supplied to the back surface side of a siding material which is appropriately processed into a predetermined shape, and a sheet-like material is fixed to this resin foam material side, and these siding material, resin foam material and sheet-like material are provided. , Both are put in a reduced pressure region of a required temperature, and by foaming the resin foam material in this reduced pressure region,
A method of manufacturing a siding board by vacuum foam molding, wherein a space between the back surface of the siding material and the back surface of the sheet-shaped material is filled with a resin foam material by foaming and curing.