JPH1110657A - Manufacture of insulating panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a filling with a synthetic resin foam that is uniformly foamed while being foamed from a distal end of a nozzle and facilitate the mechanization of a filling method. SOLUTION: An insulating panel 2 is manufactured by filling a synthetic resin foam into a box body A comprising a frame surrounding a circumferene thereof and face materials 6 mounted on sides of the frame. In this case, a through hole 55 is provided in one of the face materials 6, and after the box body A is heated with a high-frequency heating device, a foamable synthetic resin is injected into the box body A from the through hole 55 provided in the face material 6 while being foamed before the same resin gets cooled.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a method for manufacturing a heat insulating panel. More specifically, the present invention relates to a method of manufacturing a heat insulating panel in which a synthetic resin foam is filled in a box including a frame surrounding the frame and face materials attached to both sides of the frame.

[0002]

2. Description of the Related Art A heat insulating panel in which a synthetic resin foam is filled in a box comprising a frame surrounding the frame and face materials attached to both sides of the frame is light and has good heat insulating properties. No. 49-34019 (hereinafter referred to as Conventional Example 1)
Wall panels, ceiling panels, floor panels,
It is often used as a thermal insulation panel for buildings such as roof panels.

[0003] Generally, a heat insulating panel is manufactured by attaching a face material to one surface of a frame surrounding the periphery and manufacturing a box having an opening on the other surface, and inserting a synthetic resin foam from the opening into the box. , And the synthetic resin foam is bonded to the face material attached to one surface, and then the other surface which is opened is covered with the face material, and the covered face material and the synthetic resin foam are bonded. Manufactured by bonding the body.

[0004] Another method is disclosed in Japanese Patent Application Laid-Open No. H8-3402.
A method described in Japanese Patent Publication No. 7 (referred to as Conventional Example 2) is known. This method manufactures a box consisting of a frame surrounding the frame and face materials attached to both sides of the frame, and a synthetic resin foam pre-foamed into the box through a through hole provided in the frame. In addition, steam is supplied from another through hole provided in the framework to further foam the pre-foamed synthetic resin foam, and the box is filled with the synthetic resin foam.

[0005]

However, in the method described in the conventional example 1, a foamable synthetic resin is foamed to produce a synthetic resin foam, and the synthetic resin foam is put in a box and bonded. After that, many processes such as attaching a lid and bonding are performed, so that the production is complicated. In addition, the method described in Conventional Example 2 is extremely convenient because a heat insulating panel can be manufactured at the same time when a synthetic resin foam is manufactured.

However, according to this method, since water vapor is supplied from a through hole provided in a frame surrounding the periphery, water vapor cannot be supplied to every corner with a heat insulating panel having a small thickness and a large surface. There is a problem that the pre-foamed synthetic resin foam in the portion does not foam sufficiently. In the case of manufacturing a heat insulating panel having a plurality of small boxes provided with a crosspiece provided in a box, when the small box is filled with a synthetic resin foam, the frame is passed through the surrounding framework. It is necessary to provide holes and supply water vapor to the through holes from various directions. However, there is a problem that a device for supplying water vapor from around the frame overlaps the moving direction of the heat insulating panel, and it is difficult to mechanize.

Further, when there is a small box not in contact with the framework, there is a problem that steam cannot be supplied into this small box. Furthermore, since there are various methods for producing a synthetic resin foam by foaming the expandable synthetic resin, it is impossible to fill all the synthetic resin foam into the box by the above method. .

For example, in the case of a polystyrene foam or the like, the foam is foamed with water vapor. In the case of a polyurethane resin foam, a foam is produced by blowing a foamable synthetic resin from a nozzle while foaming. Thus, in the case of polystyrene resin foam, after prefoaming, it can be put in a predetermined container and completely foamed with steam, and the above method can be applied. Therefore, there is a problem that the above method cannot be applied.

Therefore, the present inventor conducted an experiment on the assumption that the above problem could be solved by providing a through hole in one of the face materials and injecting the foamable synthetic resin through the through hole. It was found that there was a difference in the expansion ratio between a certain synthetic resin foam and the synthetic resin foam near the through-hole, and it was not possible to manufacture a good heat insulating panel. Therefore, an object of the present invention is to fill a uniformly foamed synthetic resin foam while foaming from the tip of a nozzle like a polyurethane resin foam in a box, and the filling method is easy to be mechanized. An object of the present invention is to provide a method for manufacturing a heat insulating panel.

[0010]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above-mentioned object, and the invention according to claim 1 has a wooden frame surrounding the periphery and attached to both sides of the frame. A method of manufacturing a heat insulating panel in which a synthetic resin foam is filled in a box made of a wooden surface material, wherein the box is provided with a through hole for injecting a foamable synthetic resin. After the box is heated by a high-frequency heating device, the foamable synthetic resin is injected into the box while being foamed through the through holes.

According to a second aspect of the present invention, in the first aspect of the present invention, the box is heated to 30 ° C. to 50 ° C. from the periphery of the box by the high frequency heating device.

According to a third aspect of the present invention, the synthetic resin foam used in the first or second aspect of the invention is a polyurethane resin foam.

According to the first aspect of the present invention, a through-hole for injecting the foamable synthetic resin is provided, and the foamable synthetic resin is foamed from the through-hole into the box. Since the injection, by directing the through hole to one side, a device that injects while foaming the foamable synthetic resin,
It is necessary to provide only in one direction toward the through hole, and therefore, it is possible to easily provide a device for injecting while foaming the foamable synthetic resin in a direction different from the direction in which the box passes,
Easy to mechanize.

Further, in the case of a heat insulating panel having a small thickness and a large surface, by providing a large number of through holes including the vicinity of a corner on one surface, the foamable synthetic resin can be supplied to every corner while being foamed. Therefore, the fully foamed synthetic resin foam can be filled to every corner.

Further, since a box made of a wooden frame and a wooden panel attached to both sides of the frame is heated by a high-frequency heating device, it is included in the wooden frame and the wooden panel. The water inside is heated by the high-frequency heating device and the inside of the box becomes hot. Then, before cooling, the foamed synthetic resin is injected into the box through the through-holes while being foamed, so that the foam injected into the box while being foamed is filled to every corner without cooling. . Therefore, there is no difference in the expansion ratio of the synthetic resin foam between the vicinity of the through hole and the corner. or,
The heating method using a high-frequency heating device is extremely fast, and can be uniformly heated, so that the productivity is extremely improved and the occurrence of defective products is reduced.

According to the second aspect of the present invention, the box is heated to 30 ° C. to 50 ° C. from the periphery of the box by the high frequency heating device. It has been confirmed by various experiments that heating to the temperature of 30 ° C to 50 ° C is the best. Therefore, claim 2
The production of an insulated panel according to the method described makes it possible to produce a very good heat-resistant panel which is substantially uniformly foamed.

According to the third aspect of the present invention, since the synthetic resin foam is a polyurethane resin foam, the polyurethane resin is injected into a box or a small box while foaming the foam. The space can be filled with a synthetic resin foam. That is, polyurethane resin foam is generally a polyester or polyether type polyhydric alcohol,
When a foamed synthetic resin composed of a diisocyanate ester and a catalyst such as water is taken out of a nozzle, a polyaddition reaction, a foaming reaction,
A crosslinking reaction occurs, and the polyurethane resin foam comes out from the tip of the nozzle while foaming.

Accordingly, the tip of the nozzle is inserted into a through hole provided on one surface of the box, and the foamed synthetic resin is injected into the box while being foamed from the tip of the nozzle. It can be filled with a synthetic resin foam. In addition, since the polyurethane resin foam has good heat insulating properties and high mechanical strength, a heat-resistant panel having good heat insulating properties and high mechanical strength can be manufactured by the invention according to the third aspect. Can be

[0019]

Embodiments of the present invention will be described below. FIG. 1 shows an embodiment in which the present invention is applied to the manufacture of a roof unit. FIG. 1 (a) is an explanatory view showing a state in which a skeleton of a roof is assembled, and FIG. (C) is an explanatory view showing a state in which the housing is heated by the high-frequency heating device, and (d) is provided with a through hole in one of the face members of the box, and foams from this through hole. Explanatory diagram showing a state in which a conductive synthetic resin is being injected, (E) is an explanatory diagram showing a state in which an insulating panel is being conveyed while being pressed, and (F) is an illustration showing a state in which a roof panel is being finished. Figure,
(G) is an explanatory view showing a roof unit.

Reference numeral 1 denotes a roof unit. The skeleton of the roof unit 1 is, as shown in FIG. 1A, a bundle 12 is erected on a land beam 11 and a joint palm 13 is provided on the bundle. A triangular truss is formed, two of which are connected by a beam 14 and a rafter 15 is mounted thereon. A is a box, and this box A has a vertical frame 31 and a horizontal frame 32.
The crosspiece 4 is mounted in a frame 3 having a substantially rectangular frame, and a large number of small boxes 5 are formed. Face members 6 are mounted on both side surfaces of the frame 3.

Reference numeral 2 denotes a heat insulating panel.
Is a box A filled with a synthetic resin foam.
Reference numeral 55 denotes a through hole that communicates with the small box 5 provided on one of the face members 6. 7 is a foaming device, and 71 is a nozzle. 7
Reference numeral 2 denotes a drill provided with a through hole 55. Reference numeral 8 denotes a high-frequency heating device, and reference numeral 85 denotes a press device including endless transport devices provided above and below.

Reference numeral 9 denotes a roof panel.
In FIG. 1, a waterproof sheet 91 made of roofing is attached to the upper surface of the heat insulating panel 2, and a ceiling material 92 made of gypsum board is attached to the lower surface. The roof unit 1 has a roof panel 9 mounted on a rafter 15 as shown in FIG.

Next, a method of manufacturing the roof unit 1 will be described. As shown in FIG. 1 (a), a bundle 12 is erected on a land beam 11, a joint 13 is provided thereon to form a substantially triangular truss, and the two trusses are connected by a beam 14. Then, the rafter 15 is mounted thereon, and the skeleton of the roof unit 1 is manufactured. On the other hand, as shown in (b), the vertical frame 31 and the horizontal frame 32, which are made of wood, are assembled into a substantially rectangular shape to form a frame 3
Then, the beam 4 is attached to the frame 3 to form a large number of small boxes 5.

A box material A (OSB-oriented strand board) is attached to both sides of the
To manufacture. Next, as shown in (c), the box A is heated from the periphery of the box A to about 40 ° C. by passing between the high-frequency heating devices 8. Next, before the box A is cooled, as shown in (d), a through hole 55 (φ50 mm) communicating with the inside of the small box 5 is provided on one face member of the box A by a drill 72, and When the foamable polyurethane resin is injected from the foaming device 7 while being foamed into the through hole 55, the heat insulating panel 2 in which the polyurethane foam is filled in the small box 5 can be manufactured. In addition, by providing a small through-hole at an appropriate position of the framework 3 for bleeding air, the foamable polyurethane resin can be smoothly injected.

As described above, the through hole 55 communicating with the small box 5
Is provided on one of the face members, and the through hole 55 faces one side. Therefore, the foaming device 7 for injecting the foamable synthetic resin while foaming the foamed resin may be provided only in one direction toward the through hole 55. Therefore, the foaming device 7 is not obstructed by the passage passing through the heat insulating panel 2. , The foamed synthetic resin can be injected, it is easy to mechanize, and mass production of the heat insulating panel 2 is easy.

Further, even if the heat insulating panel 2 has a small thickness, the foamable synthetic resin can be supplied while being foamed to every corner by providing the plurality of through holes 55. In addition, even in the heat insulating panel 2 in which a large number of small boxes 5 are provided by dividing the inside of the framework into a large number of crosspieces, all necessary small boxes are formed while the synthetic resin is foamed from the through holes 55 communicating with the small boxes 5 5, and it is convenient because the synthetic resin foam can be prevented from being provided in the small box 5 which does not require heat insulation.

As described above, the wooden frame 3 and the frame 3
A made of wooden surface material 6 attached to both sides of
Is heated from the periphery of the box A by the high-frequency heating device, so that the moisture contained in the wooden framework 3 and the wooden surface material 6 is heated by the high-frequency heating device, and the inside of the box A is heated to a high temperature. become. Before cooling, the foamed synthetic resin is injected into the box A while being foamed from the through-holes. Therefore, the foamed foam injected while cooling is almost uniformly foamed without cooling down to every corner. Will be filled. Therefore, there is no difference in the expansion ratio of the synthetic resin foam between the vicinity of the through hole and the corner.

As described above, even if the synthetic resin foam is a polyurethane resin foam, the synthetic resin foam is injected into the small box 5 while foaming the polyurethane resin. Can be filled. Since this polyurethane resin foam has good heat insulating properties and good mechanical strength, the heat insulating panel 2 manufactured in this manner has good heat insulating properties and good mechanical strength. As shown in FIG. 1 (e), the heat-insulating panel 2 manufactured as described above is passed between presses to suppress the swollen face material.
The heat insulation panel 2 with good dimensional accuracy is obtained.

Next, a waterproof sheet 91 is attached to the upper surface of the heat insulating panel 2 and a ceiling material 92 is attached to the lower surface to produce a roof panel 9 shown in FIG. 1 (f). When the roof unit 1 was mounted on the rafter 15 of the skeleton of the roof unit 1 manufactured in (a), the roof unit 1 having good heat insulation was manufactured.

[0030]

According to the first aspect of the present invention, the box is provided with a through hole for injecting the expandable synthetic resin, and the box is formed while the expandable synthetic resin is foamed from the through hole. It is very convenient because it can be easily mechanized and mass-produced insulation panels. In the case of a heat insulating panel having a small thickness and a large surface, by providing a large number of through holes including the vicinity of a corner on one surface, the foamable synthetic resin can be supplied to every corner while being foamed. This is convenient because the synthetic resin foam can be filled to every corner.

Further, since a box made of a wooden frame and a wooden panel attached to both sides of the frame is heated by a high-frequency heating device, it is included in the wooden frame and the wooden panel. The water inside is heated by the high-frequency heating device and the inside of the box becomes hot. Before cooling, the foamed synthetic resin is injected into the box while being foamed through the through holes in the box, so the injected foam is almost uniformly distributed throughout the foam without cooling. The foamed synthetic resin foam is filled. Therefore, there is no difference in the expansion ratio of the synthetic resin foam between the vicinity of the through hole and the corner. In addition, the heating method using a high-frequency heating device is extremely fast and can be uniformly heated, so that the productivity is extremely improved and the occurrence of defective products is reduced, which is extremely valuable.

According to the second aspect of the present invention, the box is heated to 30 ° C. to 50 ° C. from the periphery of the box by the high frequency heating device. Various experiments have confirmed that heating between 30 ° C and 50 ° C is best. in this way,
Heating to the best temperature range produces very good endurance panels.

According to the third aspect of the present invention, since the synthetic resin foam is a polyurethane resin foam, the polyurethane resin is injected into a box or a small box while foaming the foam. The space can be filled with a synthetic resin foam. In addition, since the polyurethane resin foam has good heat insulating properties and high mechanical strength, when manufactured according to the third aspect of the present invention, a heat insulating panel having good heat insulating properties and high mechanical strength can be manufactured.

[Brief description of the drawings]

FIG. 1 shows an embodiment in which the present invention is applied to the manufacture of a roof unit. FIG. 1 (a) is an explanatory view showing a state in which a roof frame is assembled, and FIG. (C) is an explanatory view showing a state in which a through hole is provided in one surface of the box, (D) is an explanatory view showing a state in which synthetic resin is injected, (E) () Is an explanatory diagram showing a state in which the heat insulating panel is being conveyed, (f) is an explanatory diagram showing a state in which the heat insulating panel is being finished, and (g) is an explanatory diagram showing the roof panel.

[Explanation of symbols]

 A Box 1 Roof unit 2 Insulation panel 3 Frame 4 Beam 5 Small box 55 Through hole 6 Face material 8 High frequency heating device

──────────────────────────────────────────────────の Continued on front page (51) Int.Cl. ⁶ Identification code FI B29K 105: 04

Claims (3)

[Claims] 1. A method for manufacturing a heat insulating panel in which a synthetic resin foam is filled in a box composed of a wooden frame surrounding the periphery and wooden surface materials attached to both sides of the frame. The box is provided with a through hole for injecting a foamable synthetic resin, and after heating the box with a high-frequency heating device, foaming the foamable synthetic resin from the through hole. A method for producing a heat-insulating panel, characterized by injecting into a box. 2. The method for manufacturing a heat insulating panel according to claim 1, wherein the box is heated to 30 ° C. to 50 ° C. from the periphery of the box by a high-frequency heating device. 3. The method according to claim 1, wherein the synthetic resin foam is a polyurethane resin foam.