JPH0480807B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method for continuously manufacturing a framed heat insulating panel such as an inner wall panel used for an interior wall of a house.

(Prior art) Conventionally, this type of framed insulation panel has been produced by manufacturing the panel frame and the insulation material in separate processes, and then cutting the insulation material and fitting it into the panel frame. (Hereinafter referred to as the first conventional example).

In addition, as described in Special Publication No. 49-32257,
A frame body is interposed between the front plate and the back plate, the interior of which is partitioned by a partition bar in which a synthetic resin foam material distribution hole is bored, and a synthetic resin material is supplied into the compartment partitioned by the partition bar, A method for manufacturing a sandwich decorative structure characterized by foaming and curing is known (hereinafter referred to as a second conventional example).

Furthermore, as stated in the Japanese Patent Publication No. 55-16813,
consisting of a means for horizontally feeding two continuous sheets forming the surface layer of the laminated panel, a means for feeding a liquid phase synthetic material between the continuous sheets forming the panel core, and the continuous sheet and the synthetic material. a preforming device that works with the laminated panel to spread the liquid phase synthetic material and preliminarily determines the thickness of the laminated panel; and a preforming device that extends from near the exit of the preforming device and holds the laminated panel from above and below the operating surface. A finishing forming device including an endless upper and lower conveyor belt for conveyance, a flexible holding plate having a mesh structure deformable in all directions is placed on the upper surface of the upper conveyor belt, and its upstream end is fixed,
A series of laminated panels having a core of synthetic material, characterized in that this applies a pressing force to the upper surface of the upper conveyor belt to prevent the formation of gas pockets or wrinkles in the synthetic material and the top sheet. A manufacturing apparatus is known (hereinafter referred to as the third conventional example).

(Problems to be Solved by the Invention) However, the first conventional example requires the work of cutting the heat insulating material to match the dimensions of the panel frame and the work of fitting and fixing the heat insulating material into the panel frame. This increases the number of work steps and reduces productivity.
In particular, when cutting the heat insulating material, it is necessary to cut the heat insulating material at appropriate intervals in the length direction and to cut edges at both ends in the width direction, which is extremely troublesome. Further, since the heat insulating material cannot always be cut to an appropriate size, a small gap is created between the heat insulating material and the frame. This reduces the insulation performance of the panel. It is known that even if there is a gap of just 2 mm, the insulation performance will be reduced by 15% compared to when there is no gap. Furthermore, since the insulation material is manufactured separately from the frame,
It is not possible to accurately determine the thickness of the insulation material. In other words, when trying to obtain a heat insulating material by curing uncured foamed resin, pressure cannot be applied to the uncured resin, so the thickness becomes inaccurate and the air bubbles (also known as cells) in the heat insulating material become inaccurate. ) tends to be uneven, resulting in uneven strength of the insulation material. In other words, in the method of manufacturing the insulation material separately from the frame, the resin is foamed without any spatial restraint and then cured as it is, so the bubbles are not uniform and become non-uniform. . Furthermore,
When producing insulation materials, sheet materials are attached to the top and bottom surfaces of the insulation material, but when the resin is cured, the moisture generated by the reaction causes the top and bottom surfaces to become wet and stretch, and then shrink at drying temperatures, so this is left as is and the top and bottom surfaces are pasted. When pressure was applied using a flatter plate, there were various drawbacks such as wrinkles in the sheet material and poor appearance.

In the second conventional example, a synthetic resin foam material is filled into the inside of the Sanderutsch decorative structure, and the frame body is closed with a front plate and a back plate such as plywood, and the synthetic resin foam material is supplied inside the frame. Each piece was foamed by hot pressing.

Therefore, this conventional example is not suitable for mass production, and is not suitable for manufacturing panels required in large quantities for prefabricated houses and the like.

The third conventional example is an apparatus that continuously forms sheet-like laminated panels. A flexible presser plate with a mesh structure applies pressing force to the synthetic material and the top sheet to prevent the formation of gas pockets and wrinkles. However, since a pressing force is applied to the synthetic material from only one direction, wrinkles occur in the lower surface sheet, and uniform foaming is not formed on the lower side of the synthetic material.

Since this conventional example continuously manufactures relatively thin sheet-like laminated panels, such pressing force may only be applied in one direction. However, in the case where a foamed resin material is injected into the frame to form a relatively thick heat insulating material in the frame as in the present invention, if a uniform pressing force is not applied from above and below, the heat insulating material will not be uniform. There were problems in that air bubbles were not formed and large cavities were formed inside, and the kraft paper on the bottom surface was wrinkled.

Furthermore, since the presser plate of the second conventional example is disposed between the upper and lower endless belts, the structure of the apparatus is complicated and maintenance is also difficult. This is an important problem, but in this second conventional example, it was necessary to perform preforming to form a thin sheet-like panel. This preforming is necessary because the resin is not foamed within the frame as in the present invention.

The present invention provides a continuous manufacturing method for framed heat insulating panels that can eliminate these various drawbacks one by one.

(Example) An example of the present invention will be described below based on the drawings.

The panel frame 1 is continuously fed along the conveyance path, and after gluing is applied to the bottom surface of the panel frame 1, the lower kraft paper 3 that is continuously fed out is pasted to the bottom surface of the panel frame 1. Foamed resin material is sequentially injected into the panel frame 1 to which the kraft paper 3 has been pasted, and upper kraft paper 6 is continuously affixed to the upper surface of the panel frame 1 into which the foamed resin material has been injected. paper 3,6
Upper and lower rolls 7..., 8... are each provided with a plurality of panel frames 1, each of which has been pasted and attached, arranged vertically in parallel.
The upper and lower kraft papers 3, 6 and the foamed resin material inside the panel frame 1 are subjected to a squeezing action by the upper and lower rolls 7, 8, and the panel frame 1 is arranged with a gap between the upper and lower sides. double conveyor 15,
16, and the double conveyors 15 and 16 convey the panel frame 1 while sandwiching it from above and below, pressurize and heat it, and harden the foamed resin material inside the panel frame 1. This is a continuous manufacturing method for framed insulation panels.

As shown in FIG. 1, the apparatus used in the continuous manufacturing method of framed insulation panels applies glue to the lower surface of the panel frame 1 along a conveyance path (not shown) that conveys the panel frame 1 in the direction a. A gluing roller 12, a kraft paper adhering section 2 that affixes the lower kraft paper 3 to the bottom surface of the panel frame 1 that has been pasted, and a foamed resin inside the panel frame 1 to which the lower kraft paper 3 is affixed. An injection tool 4 for injecting, an attachment part 5 for attaching the upper kraft paper 6 to the upper surface of the panel frame 1 into which the foamed resin material has been injected, and kraft papers 3 and 6 attached to the panel frame 1. A plurality of upper and lower rolls 7..., 8... that give a squeezing effect to the foamed resin material inside the panel frame 1.
The panel frame 1 subjected to this straining action is constructed of a double conveyor 15 with an endless belt.
The foamed resin material placed in the panel frame 1 is hardened by a hardening accelerator 9 which pressurizes and heats the foamed resin material while conveying it while sandwiching it from above and below at 16.

As shown in FIG. 2, the panel frame 1 is constructed by joining wooden horizontal bars 11 between vertical wooden bars 10, 10.

A gluing roller 12 is provided for gluing the lower surface of the panel frame 1 that is continuously fed to the conveyance path.

The kraft paper pasting section 2 consists of a roller 13 that continuously feeds out the lower kraft paper 3 wound into a roll, and a presser roller 13a that presses the lower kraft paper 3 against the lower surface of the panel frame 1. . The foamed resin material injector 4 is slightly inclined toward the transport method a of the panel frame 1. As the foamed resin material injected into the panel frame 1 from the injection tool 4, phenol resin or the like is used. This foamed resin material is sequentially injected into the panel frame 1, decompresses, foams, and spreads completely within the panel frame 1. The foamed resin material is intermittently and sequentially injected into the frame 1a surrounded by the vertical bars 10 and horizontal bars 11 of the panel frame 1. Of course, it may be injected into the entire frame 1a, but it may also be injected into only a part of the frame 1a to cause foaming. It is preferable that the injection positions be placed at several locations near the respective ends of the frame 1a, either in the center or evenly divided to the left and right. Adhesive part 5
A presser roller 14 is provided for continuously feeding out the upper kraft paper 6 wound into a roll and pressing it against the upper surface of the panel frame 1. The upper surface of the panel frame 1 can also be glued using a gluing roller in the same manner as the lower surface described above. However, since the upper craft paper 6 on the upper surface adheres to the resin foaming within the panel frame 1, gluing is not necessarily required.

The upper and lower rolls 7..., 8... have a plurality of free rotating or driving rollers arranged in parallel, and each roller 7..., 8...
... are arranged so as to be in close contact with the upper and lower surfaces of the panel frame 1. Each roller 7..., 8... may be directly supported on the machine frame (not shown), but it is also possible to interpose a pressure spring, for example, so that an appropriate pressing force is always applied to the panel frame 1. These upper and lower rolls 7..., 8 in which a plurality of panel frames 1 are arranged vertically in parallel
...The upper and lower kraft papers 3 and 6 attached or stuck to the panel frame 1 when passing between them and the panel frame 1
The foamed resin material inside is subjected to a squeezing action by the upper and lower rolls 7..., 8.... This squeezing action smoothes out wrinkles in the upper and lower kraft papers, packs the foamed resin material to the corners of the panel frame 1 without any gaps, and evens out the air bubbles in the foamed resin.

The entire curing accelerating section 9 is covered with a case 18, and hot air generated by a hot air generator 17 is introduced into the case from a part of the case. This hot air accelerates the curing of the foamed resin material within the panel frame 1. Also, at this time, the panel frame 1 is connected to a double conveyor 15, 1 consisting of an endless belt.
Since the heat insulating material is pressurized by being sandwiched from above and below by the heat insulating materials 6, the thickness of the heat insulating material is kept constant even during transportation and curing. In addition, double conveyor 15, 16
The length of the tube is about 15 meters, and the passage time is set to about 2 minutes so that the foamed resin material hardens while passing through it. After passing through the hardening accelerator 9, the upper and lower kraft papers are cut to obtain a framed heat insulating panel. FIGS. 3 and 4 show panels manufactured by this method. In the figure, 19 is a heat insulating material, and 20 is a glue.

(Effects of the Invention) As explained above, according to the method for continuously manufacturing a framed heat insulating panel according to the present invention, while the panel frame is being transported, the upper and lower kraft papers are glued and pasted on the upper and lower surfaces of the panel frame. A foamed resin material is injected into the panel frame and foamed, giving a squeezing effect to the upper and lower kraft paper on the upper and lower surfaces to smooth out the wrinkles and equalize the air bubbles in the upper and lower kraft papers. A series of manufacturing operations such as pressing and curing can be performed. This is because an uncured foamed resin material is injected into the panel frame, foamed therein, and attached to the upper and lower surfaces of the foamed resin material, giving a squeezing effect to the attached upper and lower kraft paper from above and below. , there is no gap between the insulation material and the panel frame, demonstrating excellent insulation performance, and the air bubbles are evened out, increasing the strength of the insulation material. In addition, the upper and lower kraft papers attached to the upper and lower surfaces will not wrinkle. Furthermore, after applying a squeezing action to the panel frame, it is sandwiched between double conveyors and heated while being pressurized during transportation, making it possible to accurately measure the thickness of the insulation material, thereby making the strength of the insulation material uniform. . In addition, since the panel can be manufactured in a series of continuous steps, there are many other advantages such as less space required for manufacturing the panel.

Further, since the foamed resin material is injected into the frame, no preforming is necessary, and the upper and lower rolls are provided separately from the double conveyor, and the upper and lower rolls provide a squeezing action before the panel frame is placed in the double conveyor. Therefore, the manufacturing process is simple, the equipment is simplified, and maintenance etc. are also very convenient.

Since the lower kraft paper is glued and adhered to the lower surface of the panel frame, the heat insulating material is firmly held by the lower kraft paper.

[Brief explanation of drawings]

FIG. 1 is an overall side view showing an embodiment of the continuous manufacturing method for framed heat insulating panels according to the present invention, FIG. 2 is a perspective view of a panel frame, and FIG. FIG. 4 is a perspective view of the panel, and FIG. 4 is a sectional view of the same panel. 1...Panel frame, 3...Lower kraft paper on the bottom surface, 2...Adhesive section, 4...Injection tool, 5...Adhesive section, 6...Top kraft paper on the top surface, 7, 8...Top and bottom Roll, 15, 16...Double conveyor, 9...
...hardening accelerating part.

Claims (1)

[Claims] 1. Continuously feed the panel frame along the conveyance path, glue the lower kraft paper to the lower surface of the panel frame, and then attach the continuously fed lower kraft paper to the lower surface of the panel frame. Foamed resin material is sequentially injected into the pasted panel frame, and top kraft paper is continuously fed out onto the top surface of the panel frame into which the foamed resin material has been injected, and the top and bottom kraft papers are pasted and pasted. A plurality of octopus panel frames are passed between upper and lower rolls arranged vertically in parallel, and the upper and lower kraft paper and the foamed resin material in the panel frame are strained by the upper and lower rolls. It is continuously fed between double conveyors arranged with a gap between the top and bottom, and is pressurized and heated while being conveyed with the panel frame sandwiched between these double conveyors.
A continuous manufacturing method for a framed heat insulating panel characterized by curing a foamed resin material inside the panel frame.