JPH03153994A - Manufacture of heat insulating material - Google Patents

Abstract

PURPOSE:To yield a product free from swell at its recessed parts by using a plurality of pressure contact rolls equipped with self-driving power, and therewith providing pressure contact from injection of a plastics agitation liquid till completion of foaming in the recesses at the trapezoidally processed front surface of a lower metal hoop material. CONSTITUTION:An upper metal hoop material 2 is put in pressure contact by an endless conveyor on the oversurface after injection of a plastics agitation liquid. Pressure contact is made from injection of this plastics agitation liquid till completion of foaming to the recesses 4 at the trapezoidally processed front surface of a lower metal hoop material by the use of a plurality of pressure contact rolls 9 equipped with self-driving power. Depending upon the thickness of a heat insulating plate A, a plurality of roll fixing/holding tables in contact with recesses 4 at the front surface of the lower metal hoop material are inclined 1-4 deg. to the foaming direction by reference to the injection point of plastics agitation liquid. This accomplishes a heat insulating material, which is free from a skin layer or from any swell at the surface recesses of the lower metal hoop material.

Description

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

[Conventional technology]

Conventionally, as seen in Japanese Patent Publication No. Sho 63-63367, there is a method of providing a convex portion on the outer periphery of a conveyor for conveying the metal hoop material on which the convex veins are formed to support the valley bottoms on the sides of the convex veins.

In other words, the upper and lower metal hoops containing synthetic resin foam are pressed together by the upper and lower conveyors of the endless conveyor and the upper and lower conveyors, which are equipped with support protrusions that support the bottoms of the sides of the convex veins! 1
was building.

[Problem that the invention seeks to solve]

The concave surface on the front side of the trapezoidal metal hoop material swells due to the foaming pressure and internal heat generation of the synthetic resin foam. In order to prevent this, in Japanese Patent Publication No. 63-63367, a support convex part is provided on the outer periphery of the conveyor that conveys the metal hoop material on which the convex veins are formed, to support the valley bottoms on the sides of the convex veins. If the insulation board is 4 thick, the method described in Japanese Patent Publication No. 63-63367 can also solve the problem of concave deformation on the front side of the metal hoop material, but if the insulation material is thick, that is, if the foaming pressure and internal heat generation temperature are high, ■ trapezoidal veins will occur. The concave portion of the processed metal hoop material swells, and the press-contact support portion of the concave portion in contact with the trapezoid-processed metal hoop material applies a large pressure to the conveyor, and an excessive load is applied to the driving force of the conveyor. This causes local deformation of the conveyor.

■ The foaming direction of the synthetic resin stirred liquid is opposite to the direction of movement of the conveyor, that is, it rises diagonally, so if it is flattened, it is difficult to make a product with a specified thickness.

There was a drawback.

[Means for Solving] As a result of intensive research to solve the above problems, we have arrived at the present invention.

That is, in the present invention, a lower metal hoop material is continuously supplied to continuously form trapezoidal veins using a trapezoidal vein forming roll, and an upper metal hoop material is continuously supplied to form the trapezoidal veins. The lower metal hoop material and the upper metal hoop material are conveyed vertically facing each other, and a synthetic resin is applied to the concave portions and convex portions on the back side of the trapezoidal veins of the lower metal hoop material using a synthetic resin liquid agitator. In the method of manufacturing heat insulating material by injecting and dispersing liquid, the upper metal hoop material is pressed into contact with an endless conveyor on the upper surface after the synthetic resin stirring liquid is injected, and each depression on the trapezoidal veined front side of the lower metal hoop material is pressed. This method of manufacturing a heat insulating material is characterized in that a plurality of press rolls each having a self-driving force are used to press the synthetic resin from the time the agitated synthetic resin liquid is injected until the completion of foaming.

Also, depending on the thickness of the heat insulating board, the fixed holding base of the plurality of pressure rolls in contact with the concave part on the front side of the metal hoop material below is set at an angle of 1° to 4° with respect to the foaming direction from the injection point of the synthetic resin stirring liquid. It is characterized by tilting.

The present invention will be explained based on the drawings.

FIG. 1 is a cross-sectional view showing the state of the pressure roll of the recessed portion on the front side of the heat insulating plate A and the lower metal hoop material 3 of the present invention.

1 is an endless conveyor belt that presses the upper metal hoop material, and 2 is the upper metal hoop material. 3 is the lower metal hoop material processed with trapezoidal veins, 4 is the concave part on the front side of the lower metal hoop material, 5 is the convex part on the front side of the lower metal hoop material, 6 is the synthetic resin stirring liquid production prevention tape (or film). If a synthetic resin agitation liquid is injected into the uneven parts on the back side of the lower metal hoop material, and if the upper and lower endless conveyors press the concave part on the front side of the lower metal hoop material, the lower endless conveyor will form the lower metal hoop material. When only the convex portion 5 on the front side of the material is pressed, the recessed portion on the front side of the lower metal hoop material bulges out as shown at 40 in FIG. This bulge significantly reduces the commercial value of the insulation board. In order to prevent the concave portion on the front side of the lower metal hoop material from bulging, a pressure roll 9 is assembled to a plurality of independent drive shafts 8 so as to be in contact with the concave portion on the front side of the lower metal hoop material. It is designed to be installed with a distance of 1 to 2 mm between the two.

FIG. 3 is a schematic diagram of the present invention, in which synthetic resin stirring liquid 11 is injected from an independent synthetic resin liquid stirring device 10 into the recessed part (convex part 5 on the front side) on the back side of the metal hoop material 3 processed with trapezoidal veins shown below. Spread. Immediately afterwards, using an independent synthetic resin liquid stirrer 12, traverse (repeatedly cross) the uneven parts on the back side of the lower metal hoop material (recesses 4 and protrusions 5 on the front side) and inject and spray the synthetic resin stirred liquid 11. do.

An endless roller that presses the metal hoop material 2 above against a pressure roll 9 fixed to a plurality of independent drive shafts B so as to be able to press the concave portion 4 on the front side of the metal hoop material 3 below the injection point of the synthetic resin stirring liquid. A heat insulating board A is manufactured using the belt conveyor 14. The drive device 8 of the drive shaft B is connected to the pressure roll holder 16 to prevent the heat insulating plate from shifting.

FIG. 4 is a schematic diagram showing the behavior of the synthetic resin stirring liquid 11 injected and sprayed from the independent synthetic resin stirrer 12 onto the back side of the lower metal hoop material 3, where the lower metal hoop material 3 is flat and inclined. The foaming behavior is shown in the case without. The arrow indicates the direction of foaming of the synthetic resin stirred liquid.

The synthetic resin stirred liquid is in a translucent state at the start of injection and progresses through a cream state (emulsion, gasification begins), gel state (resinization begins), and foaming completion (reaction end).

If the insulation board is made thicker, the discharge volume must be larger.
The disadvantage is that the conveyor speed needs to be increased, the cream state is prolonged, and it becomes difficult to maintain a balance between the resinization reaction and the gasification reaction.

! FIG. 5 is a schematic diagram for explaining oblique foaming, which is one of the aspects of the present invention. Since the synthetic resin stirring liquid 11 has an inclination of 1° to 46°, it advances in a cream state on the back side of the metal hoop material below.

The creamy synthetic resin stirred liquid sinks under the gel 1 (resinization start) that was previously injected and dispersed, and pushes up the gelled synthetic resin stirred liquid, thereby increasing the thickness of the heat insulating board. If the desired thickness is small, the slope is 1°, and as the thickness increases, the slope increases. The maximum slope is 4°, 4
If the temperature exceeds 100°, the reaction balance between gasification and resinization of the stirred synthetic resin liquid will deteriorate.

FIG. 6 is a schematic diagram showing the inclined foaming and pressure roll of the present invention. Multiple pressure rolls to prevent swelling of the concave surface on the front side of the lower metal hoop material are used to complete foaming (rise time + 1
(usually about 2 minutes).

The synthetic resin foam used in the present invention is mainly a hard urethane foam.

〔effect〕

When a heat insulating board was manufactured using a plurality of press rolls each having an independent driving force to prevent blistering of the recessed part on the front side of the underlying metal hoop material by the inclined foaming method according to the present invention, the heat insulating material did not have a skin layer. A product was created with no bulges in the recesses on the front side of the lower metal hoop material.

[Brief explanation of the drawing]

FIG. 1 is a schematic top view of manufacturing the heat insulating material of the present invention. FIG. 2 is a cross-sectional view of a conventional heat insulating material, and is a diagram for explaining the "bulging phenomenon" caused by the foaming pressure in the recessed part on the front side of the lower metal hoop material. FIG. 383 is a schematic diagram showing a method for manufacturing a heat insulating material according to the present invention. FIG. 4 is a schematic diagram showing a conventional foaming state. FIG. 5 is a schematic diagram showing the state of foaming by inclined injection according to the present invention. Figure 116 is a schematic diagram showing the pressure welding roll and inclined injection for preventing the bulging phenomenon I' on the front side of the lower metal hoop material according to the present invention. 1. Endless conveyor belt for pressure welding of the upper metal hoop material 2) Metal hoop on the upper surface material 3, lower metal hoop material 4 with trapezoidal vein processing, concave portion 5 on the front side of the lower metal hoop material, convex portion 6 on the front side of the lower metal hoop material, synthetic resin stirring liquid production prevention tape (or film) ) 7, lIi heating material 8, pressure welding roll drive device 9, recessed part pressure welding roll 10 on the front side of the lower metal hoop material,
Synthetic resin liquid stirrer 11 for filling the recesses on the back side of the lower metal hoop material, synthetic resin stirring liquid 12) Synthetic resin liquid stirrer 13 for injecting and dispersing the entire uneven surface of the lower metal hoop material, and the upper metal hoop material Metal hoop material on the drive roll of an endless conveyor for pressure welding Conveyor for pressure welding Pressure roll fixing base Pressure roll holder Insulation plate Concavity on the front side of the metal hoop material under the drive shaft of the pressure roll Swelling phenomenon of synthetic resin stirred liquid Horizontal surface

Claims (2)

[Claims] (1) The lower metal hoop material is continuously supplied to continuously form trapezoidal veins using a trapezoidal vein forming roll, and the upper metal hoop material is continuously supplied to form the trapezoidal veins. The metal hoop material and the upper metal hoop material are conveyed vertically against each other, and synthetic resin is injected from a synthetic resin liquid stirrer onto the concave portions and convex portions on the back side of the trapezoidal veins of the lower metal hoop material. In the method of manufacturing a heat insulating material by scattering, the upper metal hoop material is pressed into contact with an endless conveyor on the upper surface after the synthetic resin stirring liquid is injected,
A heat insulating material characterized in that a plurality of press rolls equipped with self-driving force press the concave portions of the trapezoidal vein-processed front side of the lower metal hoop material from the time the synthetic resin stirred liquid is injected until the completion of foaming. Production method. (2) In claim 1, the fixed holding base of the plurality of pressure rolls that is in contact with the recessed part on the front side of the lower metal hoop material is fixed at one point in the foaming direction with respect to the injection point of the synthetic resin stirring liquid. A method for producing a heat insulating material, characterized in that the material is inclined at an angle of 4° to 4°.