JPS61118234A - Manufacture of sandwich panel - Google Patents

Abstract

PURPOSE:To contrive convenience in post work care by avoiding discontinuity of work, by a method wherein respective reactive liquids are dropped onto the surface to be applied, which are mixed on a coating surface by kneading them together and a core material is composed while timing of reaction is being taken into consideration. CONSTITUTION:Surface materials 1, 1' like colored steel plates are made to feed and run continuously or intermittently, then, fore example, an A solution such as a polyol stock solution and isocyanate B solution which are hard polyurethane series adhesive systems are discharged and dropped continuously and intermittently onto the surface to be applied through specific multihole nozzles 2a, 2b and both the solutions are kneaded together on the surface in such a manner that they are wiped by appropriate slide-wiping pads 3, 3'. As both the solutions kneaded together begin to react gradually, this timing is taken into consideration, for example, a core material 4 such as phenolic foam is inserted between the surface materials, which is passed through a belt press 5 and heating furnace 6 and cut off into a desired length of a product 8.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a so-called sandwich method in which a sheet-like, plate-like, or film-like face material or reinforcing material is bonded and laminated to at least one or both sides of a reinforcing material such as a heat insulating material or other parts. This invention relates to a method for manufacturing a panel.

In order to adhere face materials, reinforcing materials, etc. to various non-self-adhesive sealants, it is natural to use glue, and for liquid-based sealants, dripping spray, rollers, and brushes are used. ]! ! However, when it comes to multi-component adhesives such as epoxy and polyurethane, the handling methods are even more limited. It is particularly effective when producing a foam insulating material by laminating various face materials continuously.

As insulation materials for this type of laminate board, for example, those made of phenol foam are foam insulation materials that have excellent properties in terms of heat resistance, gross calorific value, smoke generation, etc. It has drawbacks such as poor adhesion.

This can be improved by combining appropriate surface materials, but since it does not have self-adhesive properties, it is necessary to separately apply an adhesive and take lamination methods such as pressing and heating.

On the other hand, the overall strength of a sandwich panel depends on the type of each constituent layer and the adhesive strength between the layers, and its cost is largely influenced by the type and amount of adhesive used.

For this type of adhesive, two-component epoxy resins are the best in terms of strength, and polyurethane resin-based adhesives with some degree of foaming property have unevenness such as embossing on the facing material or bonding surface. In some cases, the best adhesion is obtained. However, since such a two-component system reacts in a short time when mixed, it is important to know how to apply it to the surface to be coated, whether by roller coating, smearing, spraying, etc. There are new restrictions. This is an unavoidable problem as long as two reactive components are mixed before coating.

In order to overcome these drawbacks, the present invention has developed a reactive can liquid (
The same goes for not only two components but three or more components) on the surface to be coated separately, then combine them and mix on the surface to be coated, then combine the resin etc. while watching the reaction timing. This is 1. Therefore, when applying a pre-mixed product, it is possible to avoid discontinuities in work due to solidification of rollers, etc., clogging of spray nozzles and other equipment, etc., and to provide revolutionary convenience in cleaning after work. It is something.

Next, one embodiment of the present invention will be described.

A surface material such as a colored steel plate +1)o'+ is continuously or intermittently fed and run, and a hard polyurethane adhesive system such as a polyol stock solution (hereinafter referred to as "Liquid A") and isonoanate (hereinafter referred to as "Liquid") is applied onto the coated surface. B liquid) through separate porous nozzles (
2a) Discharge drops continuously or intermittently from (zb) and rub the surface with a suitable rubbing pad (3) (3) to connect the two liquids together.

The combined liquids start a rapid reaction, so take advantage of this timing and insert a filler material (4), such as phenol foam, between the face plates, as necessary.
Pass through belt press (5), heating furnace (6), etc., and cutter (
7) Cut the product (8) to the required length.

The resin material is not limited to phenolic foam.

The multi-component adhesive is not limited to polyurethane, and epoxy and other adhesives are also applicable, and the face material o+oJ is not limited to colored steel plates.

In the figure (91 (91 is the supply means of surface material, (iQa) (-1
0b) is a liquid supply means for each AXB liquid container such as a measuring pump, and the nozzle (2aX2b) has a number of discharge holes (11) drilled at appropriate intervals. good.

The dripping pattern of the adhesive can becomes a polka dot pattern when it is dripped, it is a linear pattern when it is dripped like a string, and it becomes a zigzag pattern when the nozzle is shaken.

The rubbing pad (3) serves as a trowel,
It may be coated with a mold release agent, coated with a fluororesin, etc., may be of a poor adhesion type, or may be of a disposable type.

This rubbing pad is given horizontal vibration, and
, Bi are connected together.

As described above, according to the method of the present invention, when the facing material is an embossed steel plate or a material formed into a shallow lip shape, an adhesive that can expand and fill into areas where it is difficult to penetrate with ordinary adhesives can be used. Since it is easy to use, it has remarkable effects such as good and strong bonding between each layer, improving the structural strength of the sandwich panel, and increasing the precision of the finished dimensions of the product.

[Brief explanation of the drawing]

FIG. 1 is a system diagram showing an example of a laminating line. FIG. 2 is a perspective view showing an example of the adhesive dripping situation, connection, and mixing according to the present invention. In the figure, (12) is a roll forming machine, and (13) is a preheater.

Claims (1)

[Claims] A mixed adhesive consisting of two or more components is directly dispensed and dropped onto the target surface without mixing each component in advance.
A method for manufacturing a sandwich panel, which comprises mixing the materials by connecting them with a rubbing pad to bond each layer such as the insulation material and the facing material.