JP2008307859A - Method for producing sandwich panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for producing a sandwich panel in which a belt-shaped face-material is formed by connecting a plurality of rectangular plate face-materials easily and surely, and consecutive foaming is possible even when a panel is produced by using the rectangular plate face-materials. <P>SOLUTION: The method includes a process in which the rectangular plate face-materials are installed in turn so that the downstream side edge 1d of the rectangular plate face-material 1 installed successively is laid on the upstream side edge 1c of the rectangular plate face-material 1 installed precedently on a conveyer 3, a process in which an adhesive 2 is applied on the upper surface side of the upstream side edge 1c of the rectangular plate face-material 1 installed precedently and/or on the lower surface side of the downstream side edge 1d of the rectangular plate face-material 1 installed successively, and the rectangular plate face-material 1 is joined to the upstream side edge 1c of the rectangular plate face-material 1 installed precedently by its own weight to form a belt-shaped lower face-material 8, a process for supplying a belt-shaped upper face-material 4, a process in which a polyurethane foam foaming stock solution composition is supplied from a mixing head 9 on the lower face-material 8 and foamed/cured between the upper and lower face-materials to form a belt-shaped panel, and a process for cutting the belt-shaped panel in a prescribed length. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a sandwich panel manufacturing method for manufacturing a band-shaped sandwich panel in which a rigid polyurethane foam is foam-molded between facing members disposed on both upper and lower surfaces.

  An example of a process for producing a strip-shaped sandwich panel is disclosed in Patent Documents 1 and 2 below. The sandwich panel has a structure in which, for example, a rigid polyurethane foam is sandwiched between an upper surface material and a lower surface material formed of a steel plate, and is used as a heat insulating panel for construction. In the manufacturing process of this sandwich panel, the rolls are drawn out from the roll around which the upper surface material is wound and the roll around which the lower surface material is wound, and then the polyurethane foam foam concentrate solution is supplied onto the lower surface material. Molded by foaming rigid polyurethane foam between the face materials.

  If you want to mold the surface of the sandwich panel into a corrugated shape, the steel sheet drawn from the roll is shaped into a corrugated shape with a molding machine, and then the polyurethane foam foam concentrate on the bottom material The composition is fed and the rigid polyurethane foam is foamed. Such a sandwich panel is continuously manufactured in the form of a strip, and is cut into a panel of a predetermined size by a cutting device.

Japanese Patent Laid-Open No. 10-22610 JP 2005-178136 A

  As the face material of the sandwich panel, a face material of fiber reinforced plastic (FRP) may be used instead of the steel plate so that rust does not occur. Since fiber reinforced plastic is difficult to pull out from a roll like the steel plate mentioned above and form it into a corrugated shape using a molding machine during the sandwich panel manufacturing process, it is molded into a corrugated shape in advance. A fiber-reinforced plastic plate-shaped rectangular surface material is prepared, and a sandwich panel is manufactured one by one. However, since it is inefficient to use one plate-like rectangular face material one by one, a method in which a plurality of plate-like rectangular face materials are connected with a tape to form a strip-like face material and continuously foamed. Can be considered.

  However, there is a problem that it takes time to connect a plurality of rectangular face materials with a tape. In addition, if a tape is applied without any gap along the molding shape such as a corrugated shape and the molding shapes of adjacent rectangular face materials are securely aligned and connected, there is a possibility that the polyurethane foam foam concentrate solution will leak from the joint. is there.

  The present invention has been made in view of the above circumstances, and the problem is that even when a sandwich panel is manufactured using a plate-shaped rectangular surface material, a plurality of rectangular surface materials are easily and reliably connected to each other. It is an object of the present invention to provide a method for manufacturing a sandwich panel that can form a face material and can be continuously foamed.

In order to solve the above problems, a rigid polyurethane foam sandwich panel manufacturing method according to the present invention is as follows.
A mounting in which the rectangular plate face materials are sequentially placed on the upstream edge of the rectangular plate face material previously placed on the conveyor so that the downstream edge of the subsequent rectangular plate face material is overlapped. Placing process;
An adhesive or a pressure-sensitive adhesive is applied to the upper surface side of the upstream edge of the preceding rectangular plate surface material and / or the lower surface side of the downstream edge of the subsequent rectangular plate surface material. A joining step of joining the succeeding mounted rectangular plate surface material on the upstream edge of the preceding mounted rectangular plate surface material by its own weight;
An upper surface material supply step for supplying a belt-shaped upper surface material;
A foaming step of supplying a polyurethane foam foam concentrate solution from a mixing head onto the lower surface material, and foaming and curing between the upper and lower surface materials to form a band-shaped sandwich panel;
A cutting step of cutting the strip-shaped sandwich panel into a predetermined length.

  The operation and effect of the sandwich panel manufacturing method with this configuration will be described. A plurality of plate-like rectangular face materials (hereinafter referred to as rectangular plate face materials) are prepared in advance. An adhesive or a pressure-sensitive adhesive is applied to the upper surface side of one end edge and / or the lower surface side of the other end edge of each rectangular plate surface material.

  First, a sheet of rectangular plate face material is placed on the conveyor. Next, another rectangular plate surface material is sequentially placed on the conveyor so that the edge on the downstream side of the conveyor overlaps with the edge of the rectangular plate surface material on the upstream side of the conveyor. At this time, in each rectangular plate surface material that is sequentially placed on the conveyor, the upper surface side of the upstream side edge and / or the lower surface side of the downstream side edge becomes an edge portion to which the above-described adhesive or adhesive material is applied. Like that. By placing each rectangular plate surface material on the conveyor in this way, the adhesive or pressure-sensitive adhesive is applied to the surface where the adjacent rectangular plate surface materials overlap. Then, the rectangular plate face materials are joined to each other on the upstream end edge of the rectangular plate face material previously placed, and the rectangular plate face materials are sequentially joined to form a strip-like lower face material. On the other hand, a strip-shaped upper surface material is supplied from a roll or the like.

  A polyurethane foam foam stock solution composition is supplied from a mixing head onto a strip-shaped lower surface material obtained by bonding a plurality of rectangular plate surface materials, and foam-cured between the lower surface material and the upper surface material to form a band-shaped sandwich panel. A rectangular sandwich panel is manufactured by cutting the strip-shaped sandwich panel into a predetermined length. Therefore, when each rectangular plate face material is bonded using an adhesive or a pressure-sensitive adhesive, the adhesive or the pressure-sensitive adhesive is easy to apply to the surface of the rectangular plate surface material without any gaps, so the work is easier than when bonding with tape. It is. In addition, since each rectangular plate surface material is sequentially joined so as to be joined to the upstream side edge of the rectangular plate surface material placed earlier by the dead weight of the rectangular plate surface material placed later, each rectangular plate surface material can be easily and Bonding can be ensured without gaps, and there is little possibility of leakage of the polyurethane foam foam concentrate solution from the joint.

  In the method for manufacturing a sandwich panel according to the present invention, the rectangular plate face material is preferably made of fiber reinforced plastic.

  Fiber reinforced plastic is difficult to use while being rolled out like a steel plate and pulled out in the manufacturing process of a sandwich panel. Or the method of joining with an adhesive and making it a strip | belt-shaped lower surface material is especially effective.

  In the method for manufacturing a sandwich panel according to the present invention, it is preferable that the rectangular plate surface material is a plate-shaped rectangular surface material formed into a corrugated shape.

  Since a plate-shaped rectangular surface material molded into a corrugated shape is difficult to use while being wound around a roll and pulled out, the plate-shaped rectangular surface material molded into a corrugated shape is bonded with an adhesive or adhesive. Thus, a method of forming a strip-like bottom material is particularly effective.

  A preferred embodiment of a sandwich panel manufacturing method according to the present invention will be described with reference to the drawings. FIG. 1 is a view showing a rectangular plate surface material which is a lower surface material of a sandwich panel. Such a sandwich panel is used, for example, as a roofing material, a ceiling material, or a wall material for construction. 1A is a perspective view of a rectangular plate face material, FIG. 1B is a front view, and FIG. 1C is a rear view.

  The rectangular plate surface material 1 is made of fiber reinforced plastic and is a plate-shaped rectangular surface material. As shown in the perspective view of FIG. 1A, the rectangular plate face material 1 is molded into a corrugated shape in advance. By making the rectangular plate face material 1 corrugated, the bending strength of the sandwich panel as the final product can be increased. In addition, the number and magnitude | sizes of a wave type wave can be selected suitably. Moreover, the drainage effect can be heightened when using it as a roofing material for construction by making the rectangular board surface material 1 into a waveform. In the present embodiment, the shape of the rectangular plate face material 1 is a smooth corrugated shape, but may be a repetitive shape of angular irregularities. Mainly, the smooth corrugation is used as a roofing material, and the corrugated corrugation corrugation is used as a ceiling material and wall material. Conversely, there is no problem even if a smooth corrugation is used as a wall material. .

  As shown in FIGS. 1B and 1C, the adhesive 2 is applied in the width direction with no gap between the upper surface side of the one end edge 1a and the lower surface side of the other end edge 1b of the rectangular plate surface material 1. . As the adhesive 2, for example, CS bond (CS-100, CS-200, or CS-300) manufactured by Resitex Corporation is used. This adhesive has a feature that the coated surfaces are bonded to each other, but the coated surface and the non-coated surface are not bonded, and no heat is required for bonding.

  The rectangular plate face material 1 to which the adhesive 2 is applied is stacked as shown in FIG. FIG. 2 is a side view of the state in which the rectangular plate face materials 1 are stacked, and the rectangular plate face materials 1 are all stacked in the same direction. Since the adhesive 2 is not bonded to the non-coated surface, the rectangular plate surface material 1 is not bonded to the other rectangular plate surface materials 1 above and below.

  FIG. 3 is a side view schematically showing a sandwich panel manufacturing facility. In FIG. 3, a rectangular plate face material 1 is placed on a conveyor 3 and conveyed. First, one rectangular plate face material 1 is placed on the conveyor 3. At this time, the upper surface side of the upstream edge 1c of the conveyor 3 of the rectangular plate surface material 1 is the upper surface side of the one end edge 1a coated with the adhesive 2, and the lower surface side of the downstream edge 1d is the other end edge 1b. Be on the bottom side. Next, another rectangular plate surface material 1 is placed on the conveyer 3 downstream end edge 1d on the conveyer 3 upstream end edge 1c of the rectangular plate surface material 1, and the respective rectangular plate surfaces The application surfaces of the adhesive 2 of the material 1 are made to face each other. More specifically, as shown in FIG. 4, adjacent rectangular plate surface materials 1 are aligned in the width direction so that the corrugations overlap each other, and the edges 1 c and 1 d of each rectangular plate surface material 1 are The rectangular plate face materials 1 are successively placed on the conveyor 3 so as to slightly overlap. The operation of placing the rectangular plate face material 1 on the conveyor 3 may be performed by a person or automatically by controlling a robot arm or the like.

  The strip-shaped upper surface material 4 is sequentially pulled out from the roll 5 installed on the upper side and conveyed. The upper surface material 4 pulled out from the roll 5 is conveyed by the upper surface material conveying mechanism 6. As the upper surface material 4, for example, aluminum craft paper is used.

  The rectangular plate surface material 1 placed later on the conveyor 3 is bonded to the rectangular plate surface material 1 on the upstream edge 1c of the rectangular plate surface material 1 previously placed by its own weight. Bonding is performed so that the agent 2 is pressure-bonded, and the respective rectangular plate surface materials 1 are sequentially bonded to form a strip-shaped lower surface material 8. Therefore, as shown in FIG. 4, the adjacent rectangular plate face materials 1 are placed so that the corrugations overlap each other, and are joined to the rectangular plate face material 1 placed earlier by the dead weight of the rectangular plate face material 1 placed later. Therefore, each rectangular plate face material 1 can be joined easily and reliably without a gap.

  A mixing head 9 is disposed downstream of the conveyor 3. The mixing head 9 has a uniform foam thickness in the width direction from the nozzle onto the surface of the lower surface material 8 by mixing a polyurethane foam foam stock solution in which a polyisocyanate component and a polyol composition containing a polyol compound and a foaming agent are mixed. It is discharged to become. Each rectangular plate face material 1 is joined without a gap to form a belt-like lower surface material 8, and the polyurethane foam foaming stock composition does not leak from the joint and can be continuously foamed. This is more efficient than manufacturing a sandwich panel by using the rectangular plate face materials 1 one by one.

  A foaming chamber 10 is provided further downstream of the mixing head 9 and is set to a predetermined temperature. In this foaming chamber 10, while transporting the strip-shaped lower surface material 8 and the upper surface material 4, the foamed stock solution composition is foamed and cured to produce urethane foam between the upper and lower surface materials, and a strip-shaped sandwich panel is manufactured. In the foaming chamber 10, as shown in FIG. 3, the foaming process is performed while transporting the belt-shaped sandwich panel between upper and lower conveyors (a slat conveyor is used). Moreover, although not shown in FIG. 3, the left-right direction (width direction edge part) of a strip | belt-shaped sandwich panel is conveyed in the state pressed by the block conveyor. That is, the belt-like sandwich panel is conveyed and foamed while being pressed in both the vertical and horizontal directions.

  The strip-shaped sandwich panel is cut into a predetermined size by the cutting device 11 to produce a sandwich panel P as a product. The position for cutting the band-shaped sandwich panel will be described with reference to FIG. Adjacent rectangular plate face materials 1 overlap at the edges 1 c and 1 d and are joined by an adhesive 2. Therefore, the band-shaped sandwich panel is cut along the line C on both sides thereof so as to avoid the overlapping portions of the adjacent rectangular plate face materials 1 and the adhesive 2.

<Another embodiment>
In the present embodiment, the cross section in the transport direction of the rectangular plate face material 1 transported on the conveyor 3 has a corrugated shape, but this may be rotated by 90 ° C. and the cross section in the transport direction may have a corrugated shape. . That is, the upper surface side of the one end edge 1a to which the adhesive 2 is applied and the lower surface side of the other end edge 1b may be as shown in FIG. Then, when the rectangular plate face materials 1 are placed on the conveyor 3, the adjacent rectangular plate face materials 1 are placed in a corrugated pile of the respective rectangular plate face materials 1 as shown in FIG. 6B, for example. Try to stack.

  In the present embodiment, the rectangular plate surface material made of fiber reinforced plastic is used, but the present invention is not limited to this, and a steel plate previously formed in a separate process may be used. Since the already formed steel plate can be joined with the adhesive 2 and continuously foamed, a sandwich panel can be manufactured efficiently.

  In this embodiment, the adhesive 2 is applied to the upper surface side of the upstream edge 1c of the rectangular plate surface material 1 placed in advance and the lower surface side of the downstream edge 1d of the rectangular plate surface material 1 placed in succession. However, it may be applied only to one side. In this case, an adhesive or pressure-sensitive adhesive that adheres to non-application surfaces is used instead of the adhesive that adheres only to the application surfaces as described above.

  The adhesive or pressure-sensitive adhesive is not limited to that used in the present embodiment, and any pressure-sensitive adhesive or adhesive (for example, self-adhesive) can be used as long as the rectangular plate face materials 1 can be joined to each other. Seal adhesive, cold seal adhesive, etc.).

The figure which shows the rectangular board surface material used for this embodiment Diagram showing how to stack rectangular plate face materials Side view schematically showing sandwich panel manufacturing equipment The figure which shows the rectangular plate face material arranged on the conveyor The figure which shows the cutting position of a strip-shaped sandwich panel The perspective view which shows the rectangular-plate surface material of another embodiment.

Explanation of symbols

P Sandwich panel 1 Rectangular plate surface material 1a One end edge 1b Other end edge 1c Upstream end edge 1d Downstream end edge 2 Adhesive 3 Conveyor 4 Upper surface material 5 Roll 6 Upper surface material transport mechanism 8 Lower surface material 9 Mixing head 10 Foaming chamber 11 Cutting device

Claims (3)

A mounting in which the rectangular plate face materials are sequentially placed on the upstream edge of the rectangular plate face material previously placed on the conveyor so that the downstream edge of the subsequent rectangular plate face material is overlapped. Placing process;
An adhesive or a pressure-sensitive adhesive is applied to the upper surface side of the upstream edge of the preceding rectangular plate surface material and / or the lower surface side of the downstream edge of the subsequent rectangular plate surface material. A joining step of joining the succeeding mounted rectangular plate surface material on the upstream edge of the preceding mounted rectangular plate surface material by its own weight;
An upper surface material supply step for supplying a belt-shaped upper surface material;
A foaming step of supplying a polyurethane foam foam concentrate solution from a mixing head onto the lower surface material, and foaming and curing between the upper and lower surface materials to form a band-shaped sandwich panel;
A sandwich panel manufacturing method comprising: a cutting step of cutting the band-shaped sandwich panel into a predetermined length.   The method for manufacturing a sandwich panel according to claim 1, wherein the rectangular plate face material is made of fiber reinforced plastic. The method for manufacturing a sandwich panel according to claim 1 or 2, wherein the rectangular plate surface material is a plate-shaped rectangular surface material molded into a corrugated shape.

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