JP2000052466A - Manufacture of heat insulation panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate a need for large scale facilities and greatly reduce costs, and obtain a heat insulation panel having high sound absorbing qualities and high sound insulating properties. SOLUTION: Frame members 3 along a peripheral part are fitted to one side of a panel member 2. In an expanded urethane spraying process, a closed- cell expanded urethane A is sprayed on a surface of the panel member 2 surrounded by the frame members 3 up to a position lower than the height of the frame members 3, and a heat insulation panel half P1x is manufactured. A pair of heat insulation panel halves P1x..., namely the heat insulation panel half P1x and a heat insulation panel half P1y obtained in the expanded urethane spraying process are prepared. The frame members 3 and 3 of each of the heat insulation panel halves P1x and P1y are put on top of each other. In an expanded urethane pouring process, an open cell expanded urethane B having lower expanding pressure than that of the expanded urethane A is filled to a gap between the opposite expanded urethanes A and A, and a heat insulation panel P1 is manufactured.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a heat insulating panel using urethane foam.

[0002]

2. Description of the Related Art In general, there is known a heat insulation panel in which a pair of panel members (outer panels) are filled with urethane foam to improve heat insulation and sound insulation.

Conventionally, when manufacturing this kind of heat insulating panel, as shown in FIG. 7, a pair of panel members 50 and 5 are provided.
In order to prevent deformation of the panel members 50 due to a considerably large foaming pressure generated at the time of foaming of urethane foam, a pair of outsides of each panel member 50 are sandwiched between the frame members 51. Of the urethane foam, particularly closed-cell urethane A, from the head gun 60 in the urethane foam spraying device (not shown) through the injection hole 52 provided in the frame member 51 while being pressed by the press plates Mp, Mp. And the desired heat insulation panel Pr.

[0004]

However, the above-described conventional method of manufacturing a heat insulating panel has the following problems.

First, at the time of manufacture, each panel member 50.
And a pair of press plates Mp, Mp for holding the outside of the plate are required, and since it is necessary to withstand a considerably large foaming pressure, a large-scale facility including large (high-pressure) press plates Mp, Mp is required. Costly increase.

Second, the form of the heat insulating panel that can be manufactured is limited, and in particular, a heat insulating panel having high sound absorbing and sound insulating properties cannot be obtained.

The present invention has been made to solve the problems existing in the prior art, so that large-scale equipment is not required and cost can be greatly reduced. An object of the present invention is to provide a method for manufacturing a heat insulating panel from which a panel can be obtained.

[0008]

According to a first aspect of the present invention, there is provided a method of manufacturing a heat-insulating panel, comprising the steps of: forming a frame member along a peripheral portion on one surface of a panel member;
And the panel member 2 surrounded by the frame member 3.
Urethane foam A of a closed cell type is sprayed onto the surface 2f of the above to a position lower than the height of the frame member 3 to produce the heat insulating panel half P1x, and the heat insulation obtained in this urethane foam spraying step Panel half body P1
x are prepared as a pair, that is, the heat insulating panel halves P1x and P1y are prepared, and the frame members 3 and 3 of the heat insulating panel halves P1x and P1y are overlapped with each other.
The space between the cells is filled with urethane foam B of the open-cell type having a foaming pressure smaller than that of the urethane foam A, and the heat insulating panel P
1 is characterized by comprising a urethane foam injecting step for producing the same.

On the other hand, in the method for manufacturing a heat insulating panel according to the second aspect of the present invention, a frame member 3 is mounted on one surface 2f of a panel member 2 along a peripheral portion, and is surrounded by the frame member 3. The closed-cell type urethane foam A is sprayed onto the surface 2f of the panel member 2 to the height of the frame member 3 or a position lower than the height of the frame member 3, and the heat insulating panel half P2
x, and the second panel member 2 is directly or via the second frame member 3 with respect to the frame member 3 of the heat insulating panel half P2x obtained in the urethane foam spraying step for producing x and the urethane foam spraying step. An injecting urethane foaming step of filling the space between the urethane foam A and the second panel member 2 facing each other with open-cell urethane foam B of a foaming pressure smaller than that of the urethane foam A to produce the heat insulating panel P2. It is characterized by having.

In this case, in any of the embodiments, the urethane foam panels are obtained by removing the panel members 2 and the frame members 3 from the heat insulating panels P1 and P2 obtained in the urethane foam injection step to obtain the urethane foam panels P1o and P2o. A step may be provided.

[0011]

Next, preferred embodiments according to the present invention will be described in detail with reference to the drawings.

First, an apparatus for spraying urethane foam used in the method of manufacturing a heat insulating panel according to this embodiment will be described with reference to FIG.

The urethane foam spraying apparatus 10 includes a first tank 11 for storing a base material as a raw material and a second tank 12 for storing a curing agent. Further, a main agent supply unit 13 and a curing agent supply unit 14 are provided.
Pump (proportion pump) 1 arranged below
5 and a first heater 16 disposed below the same, and the curing agent supply unit 14 includes a second pump (proportional pump) 17 disposed below the second tank 12 and a second heater 18 disposed below the second pump 12. . And the first tank 1
1 and the suction port of the first pump 15, the discharge port of the first pump 15 and the inflow port of the first heater 16, the bottom of the second tank 12, the suction port of the second pump 17, and the discharge port of the second pump 17. And the inflow port of the second heater 18 are connected by piping. In this case, the main agent and the curing agent contained in the tanks 11 and 12 are supplied to the pumps 15 and 17 by their own weights, respectively.

On the other hand, the first switching valve 19 and the second switching valve 20
And the inflow port of the first switching valve 19 is connected to the outflow port (downstream side) of the first heater 16 via a pipe.
The inflow port of the second switching valve 20 is connected to the outlet (downstream side) of the second heater 18 via a pipe. One outflow port of the first switching valve 19 is connected to the head gun 22 via a flexible tube 21 having a fixed rear end position, and the other outflow port is connected to the first tank 11 via a pipe. I do. Further, one outflow port of the second switching valve 20 is connected to the head gun 22 via a flexible tube 23 having a fixed rear end position, and the other outflow port is connected to the second tank 12 via a pipe. I do. The switching valves 19 and 20 are respectively connected to the drive unit 2
4, 25. Reference numeral 26 denotes a control unit, which controls each of the driving units 24 and 25 by applying a control signal to each of the driving units 24 and 25. As a result, the switching valves 19 and 20 are switched by the control unit 26, so that the main agent applied from the first heater 16 can be selectively supplied to the first tank 11 or the head gun 22, and the second heater 18 The applied curing agent can be selectively supplied to the second tank 12 or the head gun 22. further,
The first tank 11 is provided with a first temperature sensor 27 for detecting the temperature of the main agent contained therein, and the second tank 12 is provided with a second temperature sensor 28 for detecting the temperature of the curing agent contained therein. The temperature sensors 27 and 28 are connected to the control unit 26.

[0015] The spraying device 10 thus configured operates as follows. First, when the power is turned on, the control unit 2
The control signal 6 is applied to the drive units 24 and 25 to switch the first switching valve 19 to the first tank 11 side and the second switching valve 20 to the second tank 12 side. FIG. 3 shows this state.
In addition, the heaters 16 and 18 are energized, and the pumps 15 and 17 are operated. Thereby, the first tank 1
1 circulates in a path of the first pump 15 → the first heater 16 → the first switching valve 19 → the first tank 11 so that the main agent in the first tank 11 is heated and the second tank 12
The hardener in the second tank 17 circulates through the route of the second pump 17 → the second heater 18 → the second switching valve 20 → the second tank 12 to heat the hardener in the second tank 12.

On the other hand, the temperatures of the main agent and the curing agent in the tanks 11 and 12 are detected by the temperature sensors 27 and 28, respectively.
This detection result is provided to the control unit 26. The control unit 26 monitors the detected temperature, and when the temperature reaches the set temperature, applies a control signal to the drive units 24 and 25 to automatically switch the switching valves 19 and 20 to the head gun 22 side. Thereby, the main agent in the first tank 11 is changed from the first pump 15 to the first heater 16.
→ First switching valve 19 → Head gun 2 in the path of tube 21
2 and the curing agent in the second tank 12 is supplied to the second pump 17 → the second heater 18 → the second switching valve 20.
→ Supply to the head gun 22 through the tube 23, and the normal use mode is set. As described above, the main agent in the first tank 11 and the curing agent in the second tank 12 are preheated by the existing first heater 16 and second heater 18. Therefore, a separate heating device becomes unnecessary. In this case, the set temperatures for the main agent and the curing agent at the time of preheating are set separately, and when both reach the set temperature, the first switching valve 19 and the second switching valve 20 are simultaneously switched.

Next, a method of manufacturing a heat insulating panel according to a first embodiment of the present invention will be described with reference to FIGS.

First, a rectangular panel member (outer panel)
1, a frame member 3 in the form of a rectangular frame along the periphery is provided on one surface 2f of the panel member 2 as shown in FIG.
Is attached using an adhesive or a fixing screw. In this case, the panel member 2 and the frame member 3 may be made of metal or synthetic resin. In addition, a groove-shaped injection part 4 is formed at the center of one side of the frame member 3.

Then, as shown in FIG. 1, a closed cell type urethane foam A is sprayed from the head gun 22 of the spraying device 10 onto the surface 2f of the panel member 2 surrounded by the frame member 3. In this case, urethane foam A
Sprays to a position lower than the height of the frame member 3. The above process is a urethane foam spraying process for producing the heat insulating panel half P1x.

Next, a pair of heat insulating panel halves P1x... Obtained in the urethane foam spraying step, that is, heat insulating panel halves P1x and P1y are prepared. Insulated panel half P1x and P
1y is the same. Then, as shown in FIG. 2, the frame members 3 and 3 in each of the heat insulation panel halves P1x and P1y.
Overlap each other and fix. At this time, the groove-shaped injection portion 4
Overlap with each other to form an injection hole. Next, the head gun 22 of the spraying device 10 described above is caused to touch the injection unit 4,
The open-cell urethane B of the open-cell type having a smaller foaming pressure than the urethane A described above is injected from the head gun 22, and the space between the opposed urethanes A and A is filled as shown in FIG. The above steps are urethane foam injection steps for manufacturing the heat insulating panel P1.

In this case, the ratio of the thicknesses of the urethane foam A and the layer B can be changed by arbitrarily changing the amount of the urethane foam A to be sprayed. Further, in the urethane foam injection step, the open-cell urethane B of the open-cell type having a low foaming pressure is used, and the urethane foam A of the closed-cell type having the relatively large foaming pressure is already sprayed on the panel member 2. As in the prior art, a press plate that presses the outside of each panel member 2 to prevent deformation of the panel members 2 is unnecessary or even if used, a small (low pressure) press plate and small-scale equipment are sufficient. Therefore, a significant cost reduction is achieved. In addition, since the obtained heat insulating panel P1 has a two-layer structure of the closed-cell type urethane foam A and the open-cell type urethane foam B, the closed-cell type urethane foam A has good sound insulation characteristics and the open-cell type urethane foam. Due to the good sound absorption characteristics of the urethane foam B, the sound insulation (sound insulation and sound absorption) of the entire heat insulation panel P1 is improved,
2 with respect to the heat insulation panel Pr in the conventional technique described above.
It can be improved by about 0%.

In the above-mentioned urethane foam spraying step, a release agent is applied in advance on one surface 2f of the panel member 2, and the heat insulating panel P1 obtained by the urethane foam injection step is obtained.
If the urethane foam panel manufacturing process of removing the panel members 2 and 2 and the frame members 3 and 3 is provided, the urethane foam panel P1o made of only urethane foam shown in FIG. 4 can be obtained.

Next, a method of manufacturing a heat insulating panel according to a second embodiment of the present invention will be described with reference to FIGS.

In the second embodiment, in the urethane foam spraying step in the first embodiment, the amount of the closed cell type urethane foam A to be blown is changed. That is, in the second embodiment, the urethane foam A can be sprayed to the height of the frame member 3 as shown in FIG. Of course, in this case, the position may be lower than the height of the frame member 3. The above process is the urethane foam spraying process in the second embodiment for producing the heat insulating panel half P2x.

Next, the second panel member 2 is overlapped with the frame member 3 of the heat insulating panel half P2x obtained in the urethane foam spraying step via the second frame member 3, and is integrally fixed. The second panel member 2 and the second frame member 3 are basically the same as the panel member 2 and the frame member 3 used in the heat insulating panel half P2x,
As shown in FIG. 5, the injection section 4 is provided with the second frame member 3.
Can be provided only for Then, as shown in the figure, the head gun 22 of the spraying device 10 described above is
To fill the space between the urethane foam A and the second panel member 2 by injecting the open-cell urethane B of the open-cell type having a lower foaming pressure than the urethane foam A from the head gun 22. The above steps are
This is the urethane foam injection step in the second embodiment of manufacturing the heat insulating panel P2.

In this case, as in the first embodiment, the ratio of the thickness of the urethane foam A and the layer of the urethane foam B can be changed by arbitrarily changing the amount of the urethane foam A sprayed. Further, if the height of the frame member 3 used for the heat insulating panel half P2x is doubled, only the second panel member 2 is directly transferred to the frame member 3 of the heat insulating panel half P2x in the urethane foam injection step. What is necessary is just to overlap. Further, unlike the related art, a press plate that presses the outside of each panel member 2 to prevent the deformation of the panel members 2... Is unnecessary or even when used, a small press plate and small-scale equipment are sufficient. The point that the soundproofing can be improved is the same as in the first embodiment.

In the above-described urethane foam spraying step, a release agent is applied in advance on one surface 2f of the panel member 2, and the heat insulating panel P2 obtained by the urethane foam injection step is obtained.
If the urethane foam panel manufacturing process of removing the panel members 2 and 2 and the frame members 3 and 3 is provided, the urethane foam panel P2o using only urethane foam shown in FIG. 6 can be obtained. Same as the example.

The embodiment has been described in detail above.
The present invention is not limited to such an embodiment,
The details of the configuration, shape, method, material, material, and the like can be arbitrarily changed without departing from the gist of the present invention. For example, as an application example, instead of urethane foam A, FRP
(Synthetic resin) can also be used. The surface of the urethane foam panels P1o and P2o can be subjected to any surface treatment such as coating a refractory material.

[0029]

As described above, in the method of manufacturing a heat insulating panel according to the present invention, as a first aspect, a frame member is mounted on one surface of a panel member along a peripheral portion and surrounded by the frame member. Urethane foam of closed cell type is sprayed on the surface of the panel member to a position lower than the height of the frame member to produce a heat insulating panel half, and the heat insulation obtained in the urethane foam spraying step A pair of panel halves are prepared, the frame members of the heat insulating panel halves are overlapped with each other, and the space between the opposing urethane foams is filled with open-cell urethane foam having a smaller foaming pressure than the urethane foam, to thereby provide an insulating panel. In a second embodiment, a frame member is mounted on one surface of the panel member along the peripheral edge, and On the surface of the panel member surrounded by the frame member, a closed cell type urethane foam is sprayed to the height of the frame member or a position lower than the height of the frame member to produce a heat insulating panel half, and a foaming urethane spraying step; On the frame member of the heat insulating panel half obtained in the urethane spraying step, the second panel member is superimposed directly or via the second frame member, and the space between the facing urethane foam and the second panel member In addition, since the method includes a urethane foam injecting step of manufacturing an insulating panel by filling an open-cell urethane foam having a lower foaming pressure than the urethane foam, the following remarkable effects are obtained.

A press plate that presses the outside of each panel member to prevent the deformation of the panel member is unnecessary or requires only a small (low pressure) press plate and small-scale equipment even when used. Down can be planned.

Since the two-layer structure includes different urethane foams, the sound insulation (sound insulation and sound absorption) of the entire heat insulation panel can be greatly improved, for example, the sound insulation can be improved by about 20% as compared with the conventional heat insulation panel. Can be improved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional side view of a heat insulating panel half for explaining a urethane foam spraying step in a manufacturing method according to a first embodiment of the present invention;

FIG. 2 is a cross-sectional side view of a heat insulating panel for explaining a urethane foam injection step in the manufacturing method.

FIG. 3 is a block diagram of a spray device used in the manufacturing method;

FIG. 4 is a cross-sectional side view of a urethane foam panel manufactured by the same manufacturing method.

FIG. 5 is a cross-sectional side view of a heat insulating panel half for describing a urethane foam injection step in a manufacturing method according to a second embodiment of the present invention;

FIG. 6 is a cross-sectional side view of a foamed urethane panel manufactured by the same manufacturing method.

FIG. 7 is a cross-sectional side view of a heat insulating panel for explaining a manufacturing method according to the related art.

[Explanation of symbols]

 2 Panel member 2f One surface of the panel member 3 Frame member A Closed cell urethane foam B Open cell urethane foam P1 Heat insulation panel P2 Heat insulation panel P1x Heat insulation panel half P1y Heat insulation panel half P2x Heat insulation panel half P1o Foaming Urethane panel P2o Foamed urethane panel

Claims (4)

[Claims] 1. A frame member along a peripheral portion is mounted on one surface of a panel member, and a closed-cell type urethane foam is provided on the surface of the panel member surrounded by the frame member. A urethane foam spraying step of spraying to a position lower than the height to produce a heat insulating panel half, and a pair of heat insulating panel halves obtained in this urethane foam spraying step are prepared, and the frame members of each heat insulating panel half are overlapped. Manufacturing a heat insulating panel, characterized by comprising a urethane foam injecting step of manufacturing a heat insulating panel by filling a space between the opposed urethane foams with an open-cell urethane foam having a lower foaming pressure than the urethane foam. Method. 2. The heat insulating panel according to claim 1, further comprising a urethane foam panel manufacturing step of removing the panel member and the frame member from the heat insulating panel obtained in the urethane foam injection step to obtain a urethane foam panel. Panel manufacturing method. 3. A frame member along a peripheral portion is mounted on one surface of the panel member, and a closed-cell type urethane foam is formed on the surface of the panel member surrounded by the frame member. A urethane foam spraying step of producing a heat insulating panel half by spraying to a height or a position lower than the height, and a frame member of the heat insulating panel half obtained in the urethane foam spraying step, a second panel member Laminate directly or via the second frame member, the space between the facing urethane foam and the second panel member, filled with open-cell urethane foam having a smaller foaming pressure than the urethane foam A method for manufacturing a heat insulating panel, comprising a step of injecting urethane foam for manufacturing a heat insulating panel. 4. A urethane foam to obtain a urethane foam panel by removing the first panel member, the second panel member, and the first frame member and the second frame member from the heat insulating panel obtained in the urethane foam injection step. The method for manufacturing a heat insulating panel according to claim 3, further comprising a panel manufacturing step.