JPS6044581B2 - Heat insulating board with built-in coupling device and its manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heat insulating board that has a built-in connecting device and is made of a foamed heat insulating material, and provides a structure that allows any foamed heat insulating material to be used as a heat insulating material, and a process for manufacturing the heat insulating board. The present invention provides a method for manufacturing a heat insulating board that simplifies the process and reduces the loss of heat insulating material.

The heat insulating board 1 is generally used as a wall plate of a prefabricated refrigerator, as shown in FIG. 1, and its manufacturing method is as shown in FIG. By engaging the hook 3 of the coupling device 4 with the pin 5 or pin 5' of the other coupling device, respectively, the coupling device 4 with the hook 3 and the coupling device 4' with the pin 5 are connected. The step of engaging the mold 2 is followed by applying the iron plate 6 whose side edges are bent inward from both sides of the mold to seal the injection port 7.
The urethane foam is injected into the mold 2, and the connecting devices 4, 4 are connected to each other.
After the step of fixing the steel plates 6 and 6 to each other by the adhesive force of the urethane foam, and the foaming solidification, the locks 3, 3' that connect the connecting devices 4, 4' and the mold 2 are removed, and the partial anchors are removed. The process consists of scraping off the foam material that has spouted out.

However, in such conventional manufacturing methods, the mold 2
In order to provide airtightness that can withstand the foaming pressure of the foam insulation material while temporarily fixing the steel plate 6 and the foam insulation material, a large mechanical device or a complicated dedicated seaming device is required. It is also difficult to avoid a post-processing step to remove the heat-insulating material, and in order to ensure that all parts between the steel plates are filled with heat-insulating material during foaming, the theory necessary to fill the spaces forming the heat-insulating plates is necessary. It was common to use a larger amount of insulation material than the foam material j above to increase the foaming pressure. For this reason, the amount of insulation used is wasteful, and if unfoamed cavities remain between the steel plates, the steel plates, coupling devices, and foam material all have to be discarded as defective products. There were also things that were wrong. The heat insulating board of the present invention, which was created in view of these points, as shown in FIG.
It consists of a 9" buried auxiliary heat insulating material 10,1" and a reinforcing plate 11,1".

As in the conventional art, the coupling devices 9 and 9'' are divided into two types, one having a rotatable catch 12 and the other having a pin 13 with which the catch engages, each having two to three pieces. , and when the handle is inserted into the tool hole 14 and rotated when the heat insulating plates 1 and 1'' are connected to each other, the catch 12 loosely engages with the pin 13, and then the pin 13 It has a mechanism that operates to attract the heat insulating plates 1 and 1'' and firmly connects the heat insulating plates 1 and 1''.

The auxiliary insulation materials 10, 1'' in which the connecting devices 9, 9'' are buried are formed separately from the main insulation material 8, and by incorporating them into the notches described later in the main insulation material 8, the reinforcement plates 11, 1'' are In order to be able to install the connecting device 9,9'' in the position shown, in the illustrated embodiment the auxiliary insulation 10,1'' is shaped trapezoidally and the auxiliary thermal insulation 10 of the connecting device 9 with pins is shaped. By making the auxiliary insulating material 1' of the connecting device 9 with a latch smaller and having a different shape, the auxiliary insulating material 10,1'', that is, the connecting device 9,9'' is installed in the wrong position. The main insulation material 8 is made of foamed plastic such as styrofoam, foamed urethane, foamed vinyl chloride, or heat-insulating minerals such as perlite, and the auxiliary insulation materials 10 and 1' are attached to the specified dimensions. Notch 15,
15", and the auxiliary insulation material 1
0.1' corresponds to that of the main insulation material 8 due to mechanical frictional force caused by an appropriate adhesive or elastic deformation during fitting. Notches 15, 15
'', it is coupled to the main heat insulating material and movement in the left and right direction is restricted.

The reinforcing plates 11 and 1V are not only surface-treated copper plates such as PVC steel plates, and gold-layer plates such as aluminum plates, but also surface-treated! It can also be made of plywood, which is attached to the insulation material with adhesive to give it mechanical strength.
It also restricts the movement of the auxiliary heat insulating materials 10, 10'' in the front-rear direction.

Below, an example of a method for manufacturing a heat insulating board will be explained for an example in which polystyrene foam is used as a heat insulating material.The main heat insulating material 8 has a thickness that allows the auxiliary heat insulating material 10, 1' in which the connecting device is embedded to be fitted. It is foam-molded into a long length with a cylindrical shape, and is cut into a specified size, and notches 15, 15'' are formed therein.

Next, auxiliary insulation materials 10, 1'', which have been formed in advance so that the connecting devices 9, 9'' are buried therein, are fixed to the notches 15, 15'', and both sides of the insulation materials 8, 10 are coated with alcohol-based or normal hexane. Apply an adhesive containing a type of solvent and directly or
The heat insulating board is completed by fixing the reinforcing boards 11,1'' by hot pressing and attaching a sealing gasket 16 such as a soft foamed polyethylene sheet. Since the main insulation material is a simple plate-like material, it can be formed by dispersing granular Styrofoam and heating and foaming it, and unlike liquid foam, the foam material does not squirt out from small gaps. ,
A heat insulating material without cavities can be obtained without the need for jigs that can withstand high foaming output. Therefore, there is no waste in the insulation material used, and the amount of insulation material used can be greatly reduced.
The mechanical equipment can be of an extremely simple structure, and the manufacturing process, which also requires post-processing steps such as removal of the heat insulating material after molding, can be simplified and the same heat insulating board as in the past can be produced.

If the auxiliary insulation material 10, 1' is made of materials other than styrene, it may be foamed under pressure using a liquid foaming material as in the past, but this insulation material is a very small portion when viewed from the entire insulation board. Therefore, it does not affect the effect of reducing the material cost and simplifying the process as a heat insulating board.

Furthermore, if a cavity is accidentally generated during foaming of the main insulation material, it is sufficient to remove only the insulation material from the line and recycle it, and there is no need to discard it as a defective finished product as in the past.

Furthermore, in the above description of the manufacturing method, a method was explained in which a long main insulating material is cut into specified dimensions, but the concept of the present invention can be applied even if the main insulating material of specified dimensions with notches formed is molded one by one. is not damaged.

In such a case, the corners of the notch may not be filled with the foam material and a cavity may be formed. Therefore, the shape of the notch should be rectangular, or the shape of the notch should be rectangular, or it is difficult to form a cavity when filling with the foam material used in the present invention. It is preferable to have a shape. Although the coupling device is shown as an example of a combination of a hanger and a pin, other coupling devices such as latches and hinges for doors are also treated as coupling devices from the perspective of the present invention. In this way, in the present invention, the connecting device part that requires filling of foam material into the details is preformed as a small auxiliary insulation material, and the main insulation material, which occupies the majority, is made of granular or solid foam insulation material under low foaming pressure. After fitting the auxiliary insulation material into the corresponding notch of the main insulation material, we attached reinforcing plates to both the inside and outside of both the main and auxiliary insulation materials to form the insulation board. Not only can most of the conventionally known insulation materials mentioned above be used, but by fitting the auxiliary insulation material into the notch of the main insulation material, the main insulation material can be used until the reinforcing plate is attached. The connecting device can be temporarily fixed by using the holder, and as a result, waste of insulation material can be eliminated in the manufacturing process of insulation boards.
In addition, a heat insulating board with a built-in communication device that simplifies work can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a prefabricated refrigerator showing an example of the use of a heat insulating board, Fig. 2 is a plan view showing a conventional manufacturing method of a heat insulating board, and Fig. 3 is an exploded view showing an example of the structure of a heat insulating board according to the present invention. The perspective view and FIG. 4 are similarly cutaway views of essential parts of the heat insulating board. 1...Insulation board, 8...Main insulation material, 9,
9"...Connecting device, 10,1"...Auxiliary insulation material, 11,1"...Reinforcement plate.

Claims (1)

[Claims] 1. A heat insulating board composed of a plate-shaped main insulating material with a plurality of notches formed on each edge and a reinforcing plate that protects the main insulating material, and a device for connecting the insulating boards to each other. A heat insulating plate with a built-in coupling device, the coupling device being molded separately from the main heat insulating material, embedded in the auxiliary heat insulating material fitted into the notch, and fixed between the reinforcing plates. 2. A plate-shaped main insulation material with a plurality of notches formed on each edge;
The method of incorporating a connecting device into a heat insulating board made up of a reinforcing plate that protects the main heat insulating material includes a step of embedding the connecting device in the auxiliary heat insulating material with the opening facing on one side, and a step in which the connecting device is inserted between the auxiliary boards. The process of bonding the main insulation material, the auxiliary insulation material, and the reinforcing board while fitting the auxiliary insulation material into the notch of the main insulation material so that it can be installed at a predetermined position of the insulation board with a built-in connecting device. Production method.