JPS5814313B2 - How to mold building materials - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for molding a construction material by injection molding urethane resin into a surface material, in which a plurality of surface materials 1 are continuously conveyed by a conveyor 2 while adjoining surface materials 1 This method relates to a method for molding a building material, which is characterized by continuously injecting urethane resin 4 into the surface material 1 after coating the ends of the surface material 1 with a granular inorganic substance 3.

Conventionally, when continuously injecting urethane resin into a surface material such as a metal plate or synthetic resin board, a metal end face treatment jig 5 is interposed between the edges of adjacent surface materials to inject the urethane resin. However, since the end face treatment jig 5 is hard and the end face of the surface material is not parallel and straight to the end face treatment jig 5, the end face of the face material is easily damaged by the end face treatment jig 5. Although it is possible not to inject the urethane resin near the end face treatment jig 5, the accuracy of stopping the injection of the urethane resin is low, so there is a drawback that flakes are likely to occur.

Furthermore, when the surface material is attached to and removed from the conveyor, an edge treatment jig 5 is installed.
Since it is necessary to attach and detach the end face treatment jig 5, it takes a lot of effort to attach and detach the end face treatment jig 5.

The present invention solves the above-mentioned drawbacks, and the first object is to provide a method for forming building boards in which an inorganic substance is interposed between the edges of the surfacing material so that the surfacing material can be easily attached and removed. The second objective is to provide a method for molding building boards that can reliably prevent the occurrence of cracks.

The present invention will be explained in detail below using examples.

The surface material 1 made of a metal plate or a synthetic resin plate has a recess 7 on the back side.
It has a generally U-shaped cross section and is formed to a fixed length, and a plurality of surface materials 1 are placed at regular intervals on a conveyor 2 with a belt 6 made of vinyl chloride resin attached to the surface. The surface material 1 is placed facing upward, and the conveyor 2 is operated to continuously convey the surface material 1.

Above the conveyor 2, an inorganic material input section 8 and a urethane resin injection section 9 are arranged in order from the traveling direction of the conveyor 2, and the facing end surfaces of the adjacent surface material 1 are located below the inorganic material input section 8. , a particulate inorganic material 3 such as pearlite or calcium silicate is dropped from the inorganic material input part 8 to cover the space between the ends of the two surface materials 1 with the inorganic material 3,
Next, the urethane resin 4 is continuously injected into the recess 7 from the urethane resin injection part 9 .

A second conveyor 11 is disposed above the rear half of the conveyor 2 in the direction of movement, and a second belt 10 made of tetrafluoroethylene resin is attached to the surface of the conveyor 11 with a gap therebetween. Material 1 is further conveyed by conveyor 2 and transported to the second
While moving the conveyor 11 downward, conveyor 2 and the second
After curing and foaming the urethane resin 4 between the conveyors 11 to form a continuous layer of hard foamed urethane resin 4a with a smooth surface over the plurality of surface materials 1, the surface materials 1 are continuously taken out from the end of the conveyor 2, Next, the inorganic material 3 is added to the surface material 1.
The layer of hard foamed urethane resin 4a is cut vertically along the end face of the facing material 1 to form a building material in which the concave portions 7 of the facing material 1 are filled with the hard foamed urethane resin 4a.

As described above, since the ends of adjacent surface materials 1 were coated with the inorganic substance 3 and the urethane resin 4 was continuously injected into the plurality of surface materials 1, the urethane resin 4 was continuously applied to the plurality of surface materials 1. Moreover, since the hard foamed urethane resin 4a is formed thin in the portion between the ends of the surface material 1 due to the presence of the inorganic material 4, the thin walled portion 12 can be easily cut and the hard foamed urethane resin 4a can be used as the surface material 1. A building material filled with 4a and having excellent heat insulation properties can be formed.

Moreover, since the ends of the hard foamed urethane resin 4a are cut, burrs do not occur, and since the inorganic material 3 covering the ends of the surface material 1 is granular, it is easy to handle. Since it can be easily removed from the end of the surface material 1 and there is no need to attach or detach the end surface treatment jig 5, the surface material 1 can be easily attached or detached from the conveyor 2 and the molding process can be simplified. It is.

In addition, 13 in FIG. 3 is an air supply section. Since the present invention has the above-described configuration, an end face treatment jig is not required, the molding process is simplified, the surface material can be easily attached to and removed from the conveyor, and the urethane material is continuously formed over a plurality of surface materials. Since the resin becomes thinner at the edges of the surface material, it can be easily cut, and burrs of the urethane resin do not occur at the ends of the surface material.

[Brief explanation of the drawing]

1 and 2 are a schematic process diagram of a conventional example and a partially enlarged perspective view of the same, FIG. 3 is a schematic process diagram of an embodiment of the present invention,
FIG. 4 is a partial enlarged perspective view of the same as above before hardening and foaming, FIG. 5 is a longitudinal cross-sectional view of the same as above, and FIG. 2 is a conveyor, 3 is a granular inorganic substance, and 4 is a urethane resin.

Claims (1)

[Claims] 1. A method for molding building materials, which comprises continuously conveying a plurality of surface materials on a conveyor, coating the edges of adjacent surface materials with granular inorganic material, and then continuously injecting urethane resin into the surface materials. .