JPH03128214A - Manufacture of heat insulating mateiral - Google Patents

Abstract

PURPOSE:To obtain heat insulating board consisting of uniform synthetic resin foam without surface skin layer by a method wherein a feed pipe, which is connected to a synthetic resin liquid agitating machine, is provided and holes or slits are bored at the positions normal to metal hoop material below the feed pipe in proportion to the volumes of gaps, which are formed between metal hoop material above the feed pipe and the recessed part and projected part on the rear side of the trapezoidal waves of the metal hoop material below the feed pipe. CONSTITUTION:The trapezoidal waves of metal hoop material 2 below a feed pipe are formed with trapezoidal wave forming rolls by being continuously fed and also metal hoop material 1 above the feed pipe is continuously fed so as to pour, dust and expand synthetic resin through the circular holes or slits of the feed pipe, which is connected to a synthetic resin liquid agitating machine 9, in the recessed parts 3 and projected parts 4 on the rear side of the trapezoidal waves of the metal hoop material below the feed pipe in order to manufacture heat insulating material. At the manufacture of the above-mentioned heat insulating material, holes 12 or slits 14 in the portion for pouring and dusting resin in said recessed parts 3 are made larger than holes 11 or slits 13 in the portion for pouring and dusting resin in said projected parts 4. When the boring of hole is intened, the diameter of the hole correlates to the cross-sectional area 6 corresponding to the recessed part and the cross-sectional area 7 corresponding to the projected part.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method of manufacturing a heat insulating material used for roofing members, wall materials, and flooring materials of buildings.

[Conventional technology]

Conventionally, as seen in Japanese Patent Publication No. 63-63368, a synthetic resin stirred liquid was first injected and foamed into the recessed part of the lower metal hoop material, and after foaming was completed, the gap between the upper metal hoop material and the lower metal hoop material was filled. A heat insulating material was produced by injecting a synthetic resin stirring solution and foaming it.

This was done using a so-called two-stage foaming method.

[Problem that the invention seeks to solve]

A synthetic resin stirring liquid is injected into the recesses on the back side of the trapezoidal veins of the lower metal hoop material, and after foaming is completed, the synthetic resin stirring liquid is injected between the upper metal hoop material and the lower metal hoop material to cause foaming. In the method of producing heat insulating materials, the Il production equipment is usually fast at 6 m/min or more, and when using rigid polyurethane foam, the rise time (time to finish foaming) is around 1 minute, and in the two-stage foaming method, the rise time is about 6 m/min. Afterwards, it is necessary to inject and disperse using a synthetic resin liquid stirrer. There are two stirring injection points and
Not only is the production line long, which is costly, but there is also the problem of a high-density skin layer forming on the surface of the foam insulation material injected into the recessed areas, which results in weak adhesion between the foams. However, it has the disadvantage of being inferior in structural strength.

[Means of solution]

The inventors brought the synthetic resin stirring injection machine as close as possible,
The present invention was achieved as a result of intensive research aimed at producing a foam layer heat insulating material without a skin layer.

However, the conventional two units have a total of 19. #l If you use one stirring injector instead of the stirring injector to inject and spread the surface of the depressions and convexities on the back side of the trapezoidal veins of the metal hoop material below, the depressions will be filled with sufficient stirring liquid. Instead, voids are generated, and a dense skin layer is formed on the surface of the voids.

The present invention has been achieved in order to solve the above two problems.

The present invention provides a supply pipe connected to a synthetic resin liquid agitator,
Drill a hole or slit in a part perpendicular to the metal hoop material below the supply pipe, depending on the volume of the gap between the concave part and convex part on the back side of the trapezoidal vein of the lower metal hoop material and the upper metal hoop material. do.

That is, the present invention continuously supplies the lower metal hoop material to continuously form trapezoidal veins using a trapezoidal vein forming roll, and continuously supplies the upper metal hoop material to form the trapezoidal veins. The lower metal hoop material and the upper metal hoop material are conveyed vertically facing each other, and a supply pipe connected to a synthetic resin liquid stirrer is inserted into the recesses and protrusions on the back side of the trapezoidal veins of the lower metal hoop material. Regarding a method of manufacturing a heat insulating material by drilling a circle or a slit in a place perpendicular to the recessed part and the convex part, and injecting and dispersing a synthetic resin stirred liquid through the circular hole or slit, the recessed part This is a method for manufacturing a heat insulating material made of a synthetic resin foam, characterized in that the hole or slit in the part where the resin is injected and distributed is made larger than the hole or slit where the injection is applied to the convex part.

The important point of the present invention lies in the drilling of holes or slits in the supply pipe for the synthetic resin stirring liquid.

When drilling a hole, the diameter of the hole is the cross-sectional area equivalent to the concave part (6)
There is a correlation between this and the cross-sectional area of the convex portion equivalent cross-sectional area (7). Table 11 lists the correlation coefficients. Assuming that the area corresponding to the convex portion is 1 and the diameter of the hole at that time is 1.

If the cross-sectional area equivalent to the concave portion is 2.3.4 times the cross-sectional area equivalent to the convex portion. However, in reality, it is determined by fine adjustment depending on the viscosity of the synthetic resin stirring liquid and the reaction electrode.

Also, in the case of the same hole diameter, if the cross-sectional area equivalent to the concave part is 2.3 or 4 times the cross-sectional area equivalent to the convex part, then if the number of injection ports to the convex part is one sea bream, there are six holes to be drilled to the concave part. The number is 2.3.
There will be 4 pieces. If the cross-sectional area corresponding to the concave portion is not an integral multiple, the drilling position of the hole is moved positively or negatively toward the hole corresponding to the convex portion by calculation to 11M.

The present invention includes a method of injecting and dispersing the synthetic resin stirring liquid into the recesses and convexities on the back side of the trapezoidal veins of the lower metal hoop material using a supply pipe by using a slit (long cut) in addition to drilling a hole. The width and length of the slit to be drilled in the synthetic resin stirring liquid supply pipe, that is, the effective cross-sectional area of the slit, are determined by the above-mentioned sectional view corresponding to the concave portion (Fig. 1 6) and sectional view corresponding to the convex portion (Fig. 1 7).
There is a correlation with

That is, in the case of the same width, the length of the slit of the supply pipe is directly proportional to the cross-sectional area of the concave portion and convex portion to be injected and dispersed. or,
Increasing or decreasing the cross-sectional area equivalent to the concave part can be handled by increasing or decreasing the width in addition to increasing or decreasing the length.The increase or decrease in the 0 width is related to the viscosity and curing speed of the synthetic resin stirring liquid, and the experimental value is changed each time. Decide.

The present invention will be explained based on the drawings.

FIG. 1 is a cross-sectional view of a heat insulating board manufactured according to the present invention, in which 1 is the upper metal hoop material, 2 is the lower metal hoop material with trapezoidal vein processing, 3 is the concave part, and 4 is the convex part. , and the diagonal line at the bottom right is a synthetic resin foam insulation material, which is mainly made of hard urethane foam. 8 consists of a tape or film to prevent the synthetic resin stirring liquid from overflowing. The overlapping slope &1 part of 6 is a cross-sectional area equivalent to a concave portion for explaining the present invention, and 7 is a cross-sectional area equivalent to a convex portion.

Figure 2 shows a synthetic resin 111 liquid agitator 9, a synthetic resin 111 stirring liquid supply pipe 1O connected to the stirrer, and a synthetic resin agitator with holes drilled in the supply pipe for injection and dispersion into the metal hoop material 2 below. This is a schematic diagram showing the relationship between the liquid discharge ports 11 (for dispersing convex portions 4) and 12 (for injecting and dispersing concave portions 3) and the lower metal hoop material 2 processed with trapezoidal veins. 12 is a convex part 4 of the lower trapezoidal vein, and the diameter of the discharge port 11 for dispersion is small;
The diameter of the discharge port 12 for injecting and dispersing the recessed portion 3 is increased by the cross-sectional area corresponding to the recessed portion.

Figure 113 uses a 1-circular hole as the discharge port for the synthetic resin stirred liquid as in Figure 12, but the diameter of the circular hole is the same, and the relative cross-sectional area of the convex portion and concave portion is Depending on the ratio, the number of discharge ports to the concave portion is increased with the same hole diameter, and if the ratio is not an integer, the number is rounded up and the holes are drilled closer to the convex portion 4. In addition, the synthetic resin stirring liquid supply pipe 10 has a diameter of 5 to 15 cm.
After m traverse (crossing repetition), the synthetic resin stirring liquid is discharged and sprinkled to make it uniform.

Figure II4 and Figure jI5 are composites! ! 1. This is a schematic diagram when the synthetic resin stirring liquid discharge port of the supply pipe 10 connected to the fat liquid stirrer 9 is made into a slit shape, and FIG. Discharge port 13.1 for dispersing 4
This is a case where the width of the slit shape of No. 4 is larger than the width of the discharge port for injection and dispersion into the recessed portions than the width of the dispersion into the convex portions. The slit width of the discharge port to the recessed portion is determined by the relative ratio of the cross-sectional area equivalent to the recessed portion to the cross-sectional area equivalent to the convex portion.

On the other hand, in FIG. 15, the slit width of the discharge port to the recessed portion is the same, and the length is increased to correspond to the relative ratio of the cross-sectional area equivalent to the recessed portion.

In order to uniformly distribute the synthetic resin stirring liquid, supply pipe 1
0 traverse (repetitive crossing) is essential, and a suitable traverse width is 5 to 15 cm.

〔effect〕

Drill a circular hole or slit in a position perpendicular to the metal hoop material under the supply pipe connected to one synthetic resin liquid agitator based on the cross-sectional area equivalent to the concave part and the cross-sectional area equivalent to the convex part. Then, when a synthetic resin stirred liquid was injected and dispersed on the concave and convex parts of the lower metal hoop material through the circular holes or the slits, a heat insulating board made of a uniform synthetic resin foam without a surface skin layer was obtained. .

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a heat insulating board manufactured according to the present invention. Figures 2 and 13 are schematic diagrams of a synthetic resin liquid agitator, a supply pipe connected to it, and a case where the discharge port drilled in the supply pipe is a circular hole. This is a schematic diagram when the diameter of the discharge port to the concave portion of the metal hoop material is larger than the diameter of the discharge port to the convex portion, and I! FIG. 3 is a schematic diagram showing a case where the diameters of the discharge ports are the same and the number of discharge ports to the recessed portion is large. Figures 4 and 115 show the case where the discharge port drilled in the supply pipe connected to the synthetic resin liquid agitator is a slit, and Figure 4 shows the case where the outlet hole drilled in the supply pipe connected to the synthetic resin liquid agitator is a slit. Fig. 315 is a schematic diagram of the case where the slit width of the discharge port for injection and dispersion is larger than the slit width of the discharge port for dispersion to convex parts, and Fig. 315 is a schematic diagram of the case where the slit width of the discharge port for injection and dispersion to concave parts is the same. FIG. 3 is a schematic diagram of the present invention when the length of the discharge port is long. 1. Upper metal hoop material 2, lower metal hoop material 3 treated with trapezoidal veins, concave portion 4 of the lower metal hoop material, convex portion 5 of the lower metal hoop material, made of resin? @Insulating member 6, cross-sectional area equivalent to concave portion 7, cross-sectional area equivalent to convex portion 8, resin stirring injection spraying liquid overflow prevention tape (film) 9, synthetic resin liquid stirrer (mixing head) 10, (synthetic resin stirring liquid ) supply pipe

Claims (1)

[Claims] A lower metal hoop material is continuously supplied to continuously form trapezoidal veins with a trapezoidal vein forming roll, and an upper metal hoop material is continuously supplied to form the trapezoidal veins. The material and the upper metal hoop material are conveyed vertically facing each other, and the recessed portions and convex portions of the supply pipe connected to the synthetic resin liquid stirrer are inserted into the recessed portions and convex portions on the back side of the trapezoidal veins of the lower metal hoop material. Drill a circle or slit in a place perpendicular to the convex part,
Regarding the method of manufacturing a heat insulating material by injecting and dispersing a synthetic resin stirred liquid through the circular hole or the slit, the hole or slit in the part where the synthetic resin is injected and sprayed into the recessed part is compared with the hole or slit where the synthetic resin is injected and spread into the convex part. A method for producing a heat insulating material made of a synthetic resin foam characterized by its enlarged size.