JPH0641146B2 - Insulation material manufacturing method - Google Patents

Description

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

[Conventional technology]

Conventionally, as seen in Japanese Examined Patent Publication No. 63-63368, a synthetic resin stirring liquid is first injected into the concave portion of the lower metal hoop material for foaming, and after the foaming is completed, the space between the upper metal hoop material and the lower metal hoop material is reduced. Then, a synthetic resin stirring liquid was injected and foamed to produce a heat insulating material.

The so-called two-stage foaming method was used.

[Problems to be solved by the invention]

Synthetic resin stirring liquid is injected into the recess on the back side of the trapezoidal vein of the lower metal hoop material, and after completion of foaming, the synthetic resin stirring liquid is injected between the upper metal hoop material and the lower metal hoop material to foam. In the method of manufacturing a heat insulating material, the manufacturing equipment is usually 6
When the rigid polyurethane foam is used, the rise time (foaming end time) is about 1 minute, and in the two-stage foaming method, it is necessary to inject and spray with a synthetic resin solution stirrer 6 m after the medicine. Not to mention the cost aspect that there are two stirring injection points and the production line becomes long,
There is a problem that a high-density skin layer is generated on the surface of the foamed heat insulating material injected and filled in the recessed portion, and there is a drawback that the adhesive strength between the foams is weakened and the structural strength is poor.

[Means of solution]

The inventors have brought the synthetic resin agitator and injection machine as close as possible,
The present invention has been achieved as a result of intensive research to produce a foamed heat insulating material without a skin layer.

However, instead of using two conventional synthetic resin stirrers, one stirrer was used to inject and scatter the concave and convex surfaces on the back side of the trapezoidal vein of the metal hoop material below. Sufficient stirring liquid is not filled, voids are generated, and a skin layer having a high density is formed on the surface of the voids. The present invention has been reached to solve the above two problems.

The present invention provides a supply pipe connected to a synthetic resin liquid stirrer,
Depending on the volume of the gap between the depressions and projections on the back side of the trapezoidal vein of the lower metal hoop material and the upper metal hoop material, a hole or slit is drilled in a portion perpendicular to the metal hoop material under the supply pipe. To do.

That is, 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 lower metal hoop material and the upper metal hoop material that have been made to face each other are conveyed vertically, and the concave portion and the convex portion on the back side of the trapezoidal vein of the lower metal hoop material are connected to the synthetic resin liquid stirrer by the feeding pipe. Regarding a method for manufacturing a heat insulating material by drilling a circle or a slit at a position positioned perpendicularly to the concave portion and the convex portion, and injecting and dispersing a synthetic resin stirring liquid from the circular hole or slit, in the concave portion A method for producing a heat insulating material made of a synthetic resin foam, characterized in that the holes or slits in the portion for injection and dispersion are made larger than the holes or slits for injection and dispersion in the convex portion.

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

When drilling a hole, the diameter of the hole is the cross-sectional area corresponding to the recess (6).
Has a correlation with the cross-sectional area of the cross-sectional area (7) corresponding to the convex portion. The correlation coefficient is shown in Table 1. Assuming that the cross-sectional area corresponding to the convex portion is 1 and the diameter of the hole at that time is 1, the cross-sectional area corresponding to the concave portion is 2, 3, or 4 times the cross-sectional area corresponding to the convex portion. become. However, in practice, it is determined by fine adjustment according to the viscosity and reactivity of the synthetic resin stirring liquid.

Further, in the case of the same hole diameter, assuming that the cross-sectional area corresponding to the concave portion is 2, 3, or 4 times the cross-sectional area corresponding to the convex portion, if there is one injection port corresponding to the convex portion, the hole to be drilled for the concave portion The number is 2, 3,
It will be four. If the cross-sectional area corresponding to the recess is not an integral multiple, the hole-drilling position of the hole is adjusted by moving positive and negative toward the hole corresponding to the protrusion.

The present invention also includes a method in which the synthetic resin stirring liquid is injected and sprayed into the recesses and protrusions on the back side of the trapezoidal vein of the lower metal hoop material using the supply pipe, in addition to drilling holes. The width and length of the slit drilled in the synthetic resin stirring liquid supply pipe, that is, the effective cross-sectional area of the slit is the sectional view corresponding to the above-mentioned recessed portion (FIG. 1) and the sectional view corresponding to the convex portion (FIG. 1).
Correlates with.

That is, when the width is the same, the length of the slit of the supply pipe is directly proportional to the cross-sectional areas corresponding to the concave portions and the convex portions that are injected and dispersed. or,
To increase or decrease the cross-sectional area corresponding to the recess, it is possible to increase or decrease the width as well as the length. The increase / decrease in the width is related to the viscosity and the curing speed of the synthetic resin stirring liquid, and is determined by an experimental value each time.

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

FIG. 1 is a cross-sectional view of a heat insulating plate manufactured according to the present invention, where 1 is an upper metal hoop material, 2 is a lower metal hoop material subjected to trapezoidal vein processing, 3 is a concave portion, and 4 is a convex portion. Also, the lower right diagonal line is a synthetic resin foam heat insulating member, and hard urethane foam is mainly used. 8 is a tape or film for preventing the synthetic resin stirring liquid from overflowing. Reference numeral 6 denotes a cross-sectional area corresponding to a recessed portion for explaining the present invention, and reference numeral 7 denotes a cross-sectional area corresponding to a convex portion.

FIG. 2 shows a synthetic resin liquid stirrer 9, a synthetic resin liquid stirrer supply pipe 10 connected to the stirrer, and a synthetic resin liquid stirrer discharge port 11 drilled in the supply pipe for injecting and spraying the metal hoop material 2 below.
FIG. 3 is a schematic diagram showing the relationship between (for spraying the convex portion 4) and 12 (for spraying the concave portion 3) and the lower metal hoop material 2 which has been processed into a trapezoidal vein. Trapezoid Vein 4
The diameter of the discharge port 11 for spraying is small, and the diameter of the discharge port 12 for injecting and spraying the recessed part 3 is increased by the cross-sectional area corresponding to the recessed part.

In FIG. 3, as in FIG. 2, the synthetic resin agitation liquid discharge port uses a “circular hole”, but the diameter of the circular hole is the same, and the sectional area corresponding to the convex portion and the sectional area corresponding to the concave portion are used. The number of discharge ports to the recesses is increased with the same hole diameter according to the relative ratio of. If it is not an integer ratio, it is rounded up and increased, and is brought closer to the convex portion 4 and drilled. In addition, the synthetic resin stirring liquid supply pipe 10 is traversed 5 to 15 cm (repeatedly repeated) to discharge and homogenize the synthetic resin stirring liquid.

FIG. 4 and FIG. 5 are schematic views in the case where the synthetic resin stirring liquid discharge port of the supply pipe 10 connected to the synthetic resin liquid stirring machine 9 has a slit shape, and FIG. 4 is a metal hoop under the trapezoidal vein processing. This is a case where the slit shapes of the discharge ports 13 and 14 for spraying the concave portions 3 and the convex portions 4 of the material are larger than the width of the spraying to the convex portions and the width of the discharge ports for the injection and spraying to the concave portions. The slit width of the discharge port to the concave portion can be determined by the relative ratio of the sectional area corresponding to the concave portion to the sectional area corresponding to the convex portion.

On the other hand, in FIG. 5, 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 sectional area corresponding to the recessed portion. In order to make the spraying of the synthetic resin stirring liquid uniform, the traverse of the supply pipe 10 is essential. A traverse width of 5 to 15 cm is suitable.

〔effect〕

A circular hole or slit is drilled at a position perpendicular to the metal hoop material under the supply pipe connected to one synthetic resin liquid stirrer based on the cross-sectional area corresponding to the concave portion and the cross-sectional area corresponding to the convex portion. When a synthetic resin stirring liquid was injected and sprayed on the concave and convex portions of the lower metal hoop material through the circular holes or the slits, a heat insulating plate made of a uniform synthetic resin foam having no surface skin layer was obtained.

[Brief description of drawings]

FIG. 1 is a sectional view of a heat insulating plate manufactured by the present invention. 2 and 3 are schematic views in the case where the synthetic resin liquid stirrer, the supply pipe connected to the stirrer, and the discharge port drilled in the supply pipe are circular holes, and FIG. Fig. 3 is a schematic diagram in which the diameter of the discharge port to the recess of the metal hoop material is larger than that of the discharge port to the convex portion. Fig. 3 shows the same discharge port diameter and the number of discharge ports to the recess. FIG. 4 and 5 show the case where the discharge port drilled in the supply pipe connected to the synthetic resin liquid stirrer is a slit, and FIG. 4 shows the recessed part of the metal hoop material under the trapezoidal vein processing. Figure 5 is a schematic view when the slit width of the discharge port for injection and spraying is larger than the slit width of the discharge port for spraying on the convex part. FIG. 3 is a schematic view of the present invention when the length of the discharge port is long. 1. Upper metal hoop material 2. Lower metal hoop material that has been processed into a trapezoidal vein 3. Lower part of metal hoop material 4. 4. Convex portion of lower metal hoop material Synthetic resin foam insulation member 6. Corresponding cross-sectional area equivalent to recess 7. Cross-sectional area corresponding to convex portion 8. Synthetic resin stirring injection spray liquid overflow prevention tape (film) 9. Synthetic resin liquid stirrer (mixing head) 10. (Synthetic resin stirring liquid) supply pipe 11. (Synthetic resin stirring liquid) discharge port (small circular hole) 12. (Synthetic resin stirring liquid) discharge port (large circular hole) 13. (Synthetic resin stirring liquid) discharge port (narrow slit) 14. (Synthetic resin stirring liquid) discharge port (wide slit) 15. (Synthetic resin stirring liquid) discharge port (narrow width, long slit)

Claims (1)

[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 that have been made to face each other are conveyed vertically, and the concave portion and the convex portion on the back side of the trapezoidal vein of the lower metal hoop material are connected to the synthetic resin liquid stirrer. A method for manufacturing a heat insulating material by drilling a circle or a slit at a position perpendicular to the concave portion and the convex portion, and injecting and dispersing a synthetic resin stirring liquid through the circular hole or the slit, A method for producing a heat insulating material made of a synthetic resin foam, characterized in that the holes or slits of the portion for injecting and spraying into the recesses are made larger than the holes or slits for injecting and spraying into the convex portions.