JPH0675886B2 - Insulation material manufacturing method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for manufacturing a heat insulating material used for a roof member, a wall member and a floor material of a building.

[Conventional technology]

Conventionally, as seen in Japanese Examined Patent Publication No. 63-63368, the structure is constructed by first injecting and foaming into the concave surface of the lower metal hoop material and then after completing the foaming, injecting and foaming between the upper metal hoop material and the lower metal hoop material. Was manufacturing insulation for This is the so-called two-step method.

[Problems to be solved by the invention]

After injecting into the concave portion of the lower metal hoop material and foaming, the second synthetic resin foaming stock solution stirring liquid is injected and filled between the upper metal hoop material and the lower metal hoop material to produce the heat insulating material. In the method, when the production apparatus is set to 6 m / min, the reaction of the synthetic resin foaming stock solution is fast, so when using, for example, a rigid polyurethane foam, its rise time (foaming end time)
Is about 1 minute, and in the conventional two-stage foaming, the distance between the first injection point and the second injection point needs to be about 6 m. In addition, two agitators for the synthetic resin foaming stock solution are required.

The conventional method has many problems in terms of cost and location. In addition, from the viewpoint of foamed resin as a heat insulating material, after injection and foaming into the concave part of the lower metal hoop, it is injected and foamed again, so the surface of the foamed foam injected into the concave part is free foaming. A skin layer is generated. Since the synthetic resin foaming stock solution agitation liquid is again injected and filled on top of this, the adhesive strength between the first foaming of the synthetic resin and the second foaming of another synthetic resin becomes weak and the structural strength becomes poor.

[Means of solution]

The present inventors have arrived at the present invention as a result of earnest efforts to obtain a heat insulating material of a synthetic resin foam without a skin layer, and further to make stirring and injection as close as possible.

Even if the concave and convex parts of the lower metal hoop material are injected and filled by the traverse method in a one-step method, the concave part of the trapezoidal vein is not filled with sufficient liquid, resulting in voids, which is bad. Has a skin layer on the surface of the void. The present invention has been conceived in order to solve the above problems.

The present invention continuously supplies the lower metal hoop material to continuously form the trapezoidal vein with a trapezoidal vein forming roll, and continuously supplies the upper metal hoop material to form the trapezoidal vein. The metal hoop material and the upper metal hoop material are conveyed vertically facing each other, and the synthetic resin foam synthetic solution is connected to the agitator of the synthetic resin foaming stock solution to inject each of the concave portions on the back side of the trapezoidal vein of the lower metal hoop material. No more than two synthetic resin foaming stock solution stirring liquid injection pipes are provided in the foaming stock solution stirring liquid supply pipe, and the synthetic resin foaming stock liquid stirring device is connected to each of the convex portions of the trapezoidal veins of the metal hoop material below. A synthetic resin foaming stock solution stirring liquid supply pipe is provided with up to two synthetic resin foaming stock solution stirring liquid injection pipes, and the synthetic resin foaming stock solution stirring liquid is simultaneously injected and filled between the lower metal hoop material and the upper metal hoop material. A method for producing a heat insulating material, which is characterized by foaming.

The present invention will be described in detail with reference to the drawings.

FIG. 1 is a cross-sectional view of a heat insulating material of the present invention, where 1 is an upper metal hoop material and 2 is a lower metal hoop material. Reference numeral 4 denotes a lower metal hoop material concave surface portion, 5 denotes a lower metal hoop material convex surface portion, and 3 denotes a synthetic resin foam. Reference numeral 6 is an overflow prevention tape of the synthetic resin foaming stock solution injected and filled.

FIG. 2 is a schematic view of the present invention, and 7 is a synthetic resin foaming stock solution agitator (mixing head) from which pressure is fed to a synthetic resin foaming stock solution agitation solution supply pipe 8 at a low pressure (less than 10 kg / cm).
The length of the synthetic resin foaming stock solution stirring liquid supply pipe corresponds to the effective width of the heat insulating plate of the synthetic resin foam. The injection pipe for injecting and spraying into the concave portion and the convex portion of the lower metal hoop corresponds to the concave portion and the convex portion of the lower metal hoop from the synthetic resin foaming stock solution stirring liquid supply pipe. It is branched into the injection pipe 10. Reference numeral 11 is a synthetic resin foaming stock solution agitation injection solution.

In the stationary state, there are two convex surface injection pipes in FIG.
Although there is only one concave surface injection pipe, one convex surface injection pipe and two concave surface injection pipes may be used as shown in FIG. 3, and two concave surface injection tubes and two convex surface injection tubes are provided. But it's okay.

The synthetic resin foaming stock solution agitation liquid supply pipe traverses in a width of 5 to 15 cm, taking into consideration the shapes and product thicknesses of the concave and convex parts, and the apparent density of the synthetic resin foam that constitutes the heat insulating plate. Then, the space between the upper metal hoop and the lower metal hoop is designed to be uniform. It is desirable that the length of the injection pipe is longer in the concave surface injection pipe than in the convex surface injection pipe because the synthetic resin foaming stock solution stirring liquid does not scatter. When traversing (repeating crossing), the height of the synthetic resin foaming stock solution stirring liquid supply pipe 8 is adjusted so that the tip of the concave surface injection pipe 10 does not contact the convex surface portion 5.

In any case, the concave surface injection pipe is longer than the convex surface injection pipe. For the above reasons, the length L of the concave surface injection pipe is h-2 <L
<H + H / 2, the length l of the convex surface injection pipe is h / 2 <l <h-2
(See Fig. 1, the unit is cm).

The hole diameter of the injection pipe is determined from the volume A corresponding to the concave portion and the volume B corresponding to the convex portion. The cross-sectional hole area of the injection pipe and the concave surface equivalent volume A and the convex surface equivalent volume B are approximately proportional.

〔effect〕

By changing the lengths of the convex surface injection pipe 9 and the concave surface injection pipe 10 and adjusting the number of injection pipes and the hole diameter, the convex portion 5 and the concave surface portion 4 of the metal hoop under the synthetic resin foaming stock solution stirring liquid can be changed. Since the dispersion of the synthetic resin foaming stock solution was injected and sprayed all at once, a uniform foam heat insulating material without a skin layer was obtained.

[Brief description of drawings]

FIG. 1 is a sectional view of a heat insulating plate. 2 and 3 are examples of schematic diagrams for explaining the synthetic resin foaming stock solution stirring liquid supply pipe of the present invention. 1 …… Upper metal hoop material 2 …… Lower metal hoop material 3 …… Synthetic resin foam insulation 4 …… Lower metal hoop concave part 5 …… Lower metal hoop convex part 6 …… side Part Himing prevention tape (or film) 7 …… Synthetic resin foaming stock solution agitator (mixing head) 8 …… Synthetic resin foaming stock solution stirring liquid supply tube 9 …… Convex injection pipe 10 …… Concave injection pipe 10a …… Concave surface Part Injection tube tip 11 …… Synthetic resin foaming stock solution Stirring injection solution A …… Concave surface equivalent volume B …… Convex surface equivalent volume

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location B29L 9:00 4F 31:10 4F

Claims (2)

[Claims] 1. A lower metal hoop material is continuously supplied to form a trapezoidal vein continuously with a trapezoidal vein forming roll, and an upper metal hoop material is continuously supplied to form the trapezoidal vein. The lower metal hoop material and the upper metal hoop material, which were made to face each other, were conveyed vertically, and were connected to a synthetic resin foaming stock solution agitator for injecting each of the concave portions on the back side of the trapezoidal vein of the lower metal hoop material. No more than two synthetic resin foaming stock solution stirring liquids are provided in the synthetic resin foaming stock solution stirring pipe, and the synthetic resin foaming stock solution stirring machine is connected to each of the convex portions of the trapezoidal veins of the metal hoop material below. The synthetic resin foaming stock solution stirring liquid supply pipe is provided with up to two synthetic resin foaming stock solution stirring liquid injection pipes, and the synthetic resin foaming stock solution stirring liquid is simultaneously injected between the lower metal hoop material and the upper metal warp material. A method for producing a heat insulating material, which comprises filling and foaming. 2. The length of the injection pipe of the synthetic resin foaming stock solution stirring liquid with respect to the concave portion on the back side of the trapezoidal vein of the lower metal hoop material with respect to the convex surface portion on the backside of the trapezoidal vein according to claim 1. A method of manufacturing a heat insulating material, characterized in that it is longer than the length of the injection pipe.