JP2009006565A - Manufacturing method of sandwich panel and manufacturing equipment of sandwich panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of sandwich panel capable of suppressing material waste by making thickness dimension as uniform as possible when manufacturing a belt-like sandwich panel. <P>SOLUTION: The manufacturing method of sandwich panel for manufacturing a belt-like sandwich panel prepared by foaming a foaming resin core material between face materials disposed oppositely on upper and lower both surfaces comprises: a process of supplying a foaming stock solution composition of the foaming resin core material between the belt-like lower face material 2 and the belt-like upper face material 1 which are conveyed; a process of lifting both end parts in the width direction of back surface side of the lower face material 2 after supplying the foaming stock solution composition; and a process of conveying the lower face material 2 and the upper face material 1 while performing the foaming of the supplied foaming stock solution composition. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a sandwich panel manufacturing method and a sandwich panel manufacturing facility for manufacturing a band-shaped sandwich panel in which a foamable resin core material is foam-molded between facing members arranged on both upper and lower surfaces.

  An example of a process for manufacturing a strip-shaped sandwich panel is disclosed in Patent Document 1 below. The sandwich panel has, for example, a structure in which a rigid polyurethane foam is sandwiched between an upper surface material and a lower surface material formed of a flexible 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 a rigid polyurethane foam (corresponding to a foamable resin core material) is placed between these surface materials. Form by foaming. 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. As the face material, a paper material such as kraft paper or a steel plate face material is mainly used.

  In addition, the foaming stock solution composition is discharged onto the surface of the lower surface material from the mixing head (raw solution supply unit) disposed between the upper surface material and the lower surface material to be conveyed, and then in the form of a band-like sandwich panel by a so-called double conveyor. Foaming is performed while being conveyed.

JP 2005-178136 A

  In such a configuration, the foaming stock composition is supplied by the mixing head so as to have a uniform thickness on the lower surface material. For example, by supplying the foaming stock solution composition while reciprocating the mixing head along the width direction of the strip-like bottom surface material, or by pressing the top surface material from above after supplying the foaming stock solution composition, the thickness is as much as possible. Is a uniform sandwich panel.

  However, when the thickness of the product is particularly 50 mm or more, the supply amount of the foaming stock solution composition also increases, so the supply of liquid at both ends in the width direction becomes insufficient, and the thickness is also thinner than the central portion. It tends to be. Therefore, for example, in order to obtain a panel having a width of 800 mm, the supply width of the foaming stock solution composition is about 1100 mm, and the area that can be effectively used as a product is narrower than the supply width of the foaming stock solution composition. The material was wasted.

  The present invention has been made in view of the above circumstances, and the problem thereof is to provide a sandwich panel manufacturing method and a sandwich panel manufacturing facility capable of suppressing the waste of materials by making the thickness dimension as uniform as possible when manufacturing a strip-shaped sandwich panel. Is to provide.

In order to solve the above problems, a sandwich panel manufacturing method according to the present invention includes:
A sandwich panel manufacturing method for manufacturing a band-shaped sandwich panel in which a foamable resin core material is foam-molded between face materials arranged oppositely on both upper and lower surfaces,
Supplying a foamed stock solution composition of a foamable resin core material between the belt-like lower surface material and the belt-like upper surface material to be conveyed;
After supplying the foaming stock solution composition, lifting the both ends in the width direction on the back side of the belt-like bottom material upward,
And a step of conveying the lower surface material and the upper surface material while performing the foaming treatment of the supplied foaming stock solution composition.

  The operation and effect of the sandwich panel manufacturing method having such a configuration will be described. The foamed stock solution composition is supplied between the strip-shaped lower surface material to be transported and the strip-shaped upper surface material, and then the foamed stock solution composition layer is formed between the upper and lower surface materials to the foam transport unit. It is sent. After supplying this foaming stock solution composition, both ends in the width direction on the back surface side of the belt-like bottom material are lifted upward. Thereby, the force which is going to return the foaming undiluted | stock solution composition of the width direction both ends to the center side acts. By applying such a force, the foaming stock solution composition can be moved in a direction in which the thickness becomes uniform, particularly in the region inside the lifting region. As a result, it is possible to provide a sandwich panel manufacturing method capable of suppressing the waste of materials by making the thickness dimension as uniform as possible when manufacturing a strip-shaped sandwich panel.

  In the present invention, after supplying the foaming concentrate composition, it has a step of supplying the upper surface material above the lower surface material and pressing the upper surface material from above. After this step, the both ends in the width direction are directed upward. It is preferred that a lifting step is performed.

  By pressing the top material from above, the foamed stock solution composition supplied from the stock solution supply unit can be made uniform first. After this pressing step, the foamed stock solution composition can be supplied more uniformly by lifting both ends in the width direction upward.

In order to solve the above problems, the sandwich panel manufacturing equipment according to the present invention is:
A stock solution supply unit for supplying a foamed stock solution composition of a foamable resin core material between the strip-shaped bottom surface material and the strip-shaped top surface material to be conveyed;
A lifting means for lifting the both ends in the width direction on the back side of the belt-like bottom material after the foaming stock solution composition is provided on the downstream side of the transport of the stock solution supply unit;
And a foam conveying section for conveying the lower surface material and the upper surface material while performing the foaming treatment of the supplied foaming stock solution composition.

  The operation and effect of the sandwich panel manufacturing facility having such a configuration is as described above, and the lifting means causes a force to return the foaming stock solution composition at both ends in the width direction to the center side, thereby making the thickness uniform. The foaming stock solution composition can be moved in the direction.

  The lifting means according to the present invention is preferably a bar member arranged in parallel with the transport direction.

  By disposing such a bar member, both ends in the width direction can be lifted upward over the length of the bar member. Therefore, the lifting means can be configured with a simple configuration.

  The rod member according to the present invention preferably has a circular cross section. Thereby, a lifting means can be comprised, suppressing cost.

  The rod member according to the present invention has a triangular cross section, and is preferably arranged so as to be lifted upward as it goes outward in the width direction. Such a member can also constitute a lifting means while suppressing costs. Moreover, by making it a cross-sectional triangle, a strip | belt-shaped lower surface material can be conveyed in the state which lifted upwards gradually, so that it went to the width direction outer side.

  A preferred embodiment of a sandwich panel manufacturing facility according to the present invention will be described with reference to the drawings. FIG. 1 is a side view schematically showing a sandwich panel manufacturing facility. Such sandwich panels (hereinafter abbreviated as panels) are used as, for example, building wall materials.

<Configuration of manufacturing equipment>
As shown in FIG. 1, the upper surface material 1 and the lower surface material 2 are the same material, and for example, a soft material such as paper (such as kraft paper or resin caninate paper) or aluminum foil, or a steel plate is used. The upper surface material 1 is wound around a roll 10 positioned relatively above. The lower surface material 2 is wound around a roll 11 positioned relatively below. Each of the rolls 10 and 11 is rotationally driven around a predetermined axis by a feeding device (not shown). Thereby, the upper surface material 1 and the lower surface material 2 are drawn out from each roll 10 and 11 in strip shape.

  The mixing head 12 (corresponding to the stock solution supply unit) supplies the foamed stock solution composition between the upper surface material 1 and the lower surface material 2. More specifically, a foamed stock solution composition obtained by mixing a polyisocyanate component and a polyol composition containing a polyol compound, a foaming agent, etc. on the belt-shaped bottom material 2 to be conveyed is formed on the surface of the bottom material 1. Are discharged so as to have a uniform stock solution thickness in the width direction.

  Only the lower surface material 2 is preheated on the injection table 16 and passes through the nip roller 13, and then the foaming gradually proceeds and is transported by the double conveyor 14 (corresponding to the foam transporting unit). The manufactured strip-shaped panel P is cut by the cutting device 15 and then stacked in the stacking unit 17. The cutting device 15 cuts the panel in the width direction (direction perpendicular to the transport direction).

  FIG. 2 is a perspective view showing the main part of the sandwich panel manufacturing facility. FIG. 3 is a plan view showing the configuration of the main part. FIG. 4 is a diagram showing a cross-sectional structure in the width direction of the main part.

  As shown in FIG. 2, the foaming stock solution composition is supplied onto the lower surface material 2 from the mixing head 12. Although not shown, the mixing head 12 is actually configured to reciprocate along the width direction of the lower surface material 2, so that the foaming stock solution composition can be applied as uniformly as possible. Yes. The mixing head 12 is disposed upstream of the nip roller 13, and the applied foaming stock composition is leveled by the nip roller 13 so that a uniform thickness can be achieved. The upper surface material 1 is supplied in a form that is guided by the nip roller 13, and the upper surface material 1 is pressed by the nip roller 13.

  The double conveyor 14 is a conveyor device in which a large number of slats 14a are connected by an endless chain, and conveys the upper surface material 1 and the lower surface material 2 with a sandwich panel sandwiched from above and below. Although not shown, a conveyor device for pressing the width direction end portion in the width direction of the sandwich panel is also provided. Since foaming gradually proceeds from the position of the nip roller 13 to the position of the double conveyor 14, the distance (thickness) between the upper surface material 1 and the lower surface material 2 is gradually increased.

  Furthermore, in the conveying process between the position of the nip roller 13 and the position of the double conveyor 14, lifting means for lifting the width direction both ends of the sandwich panel are arranged. The lifting means are disposed at both ends in the width direction of the sandwich panel. Specifically, as shown in FIGS. 3 and 4, the first bar member 20 and the second bar member are parallel to the direction in which the face material is conveyed. 21. The first and second rod members 20, 21 are metal rods having a circular cross section, and the first rod member 20 on the outer side in the width direction has a larger diameter. Thereby, the lower surface material 2 is deformed so as to be lifted upward as it goes outward in the width direction.

  For example, if the width of 1100 mm is the dimension of the coating width, the second rod member 21 having a diameter of 3 mm is arranged at a position 100 mm inside from the end in the width direction, and the first of 5 mm at a position 50 mm inside from the end in the width direction. The bar member 20 is disposed.

  Note that these bar members 20 and 21 are disposed over the region downstream of the nip roller 30 and up to the entrance of the double conveyor 14. The foaming concentrate composition is supplied by the mixing head 12 so as to have a uniform thickness as much as possible, and a sandwich panel having a uniform thickness can be obtained by pressing with the nip roller 13. Compared to, the thickness tends to be thin. Then, the force which tries to return the foaming undiluted | stock solution composition of the width direction both ends to the center side acts by said lifting means. By applying such a force, the foaming stock solution composition can be moved in a direction in which the thickness becomes uniform, particularly in a region inside the region where the bar members 20 and 21 are disposed.

  In FIG. 4, two rod members are arranged at one end, but this may be one, or three or more. In FIG. 4, the diameters of the first rod member 20 and the second rod member 21 may be the same, and the height of the axial center may be changed. In addition, the lifting amount A at both ends in the width direction and the lifting region B (see FIG. 4) can be set according to the thickness of the sandwich panel to be manufactured. By lifting the lower surface material 2, both end portions of the upper surface material 1 are lifted in the same manner.

  According to the present invention, after the foaming concentrate composition supplied from the mixing head 12 to the upper surface of the lower surface material 2 is made uniform by the nip roller 30, the sandwich panel is further improved by the function of the lifting means. The foaming stock solution composition is applied in a state as uniform as possible in the width direction. While maintaining this state, the double conveyor 14 carries the foaming process.

  The first and second rod members 20 and 21 as lifting means are arranged up to the front of the double conveyor 14 as described above. This is because if the lifting means is disposed at a place where the curing has progressed, the traces of the first and second rod members 20 and 21 become streaks and appear in the appearance, which may deteriorate the appearance quality.

  FIG. 5A shows the cross-sectional shape of a sandwich panel manufactured without the lifting means according to the present invention, and FIG. 5B shows the cross-sectional shape of the sandwich panel manufactured with the lifting means. Although the effective width is indicated by W here, the effective width can be increased by providing a lifting means, and waste of material can be suppressed.

  As a specific example, when manufacturing a sandwich panel having a thickness of 90 mm, the standard of thickness is 90 ± 2 mm. When the lifting means was not provided, the effective width W was 800 mm, but it could be 950 mm by providing the lifting means.

<Another embodiment>
As the lifting means, a wedge-shaped rod member 22 as shown in FIG. 6 may be used. By making it wedge-shaped, the width direction both ends can be lifted upwards, so that it goes to the width direction outer side. In addition, when it forms in a wedge shape, since a contact area with the lower surface material 2 becomes large, it is preferable to provide the mechanism which heats the rod member 22 itself, or to form with the material which is easy to transmit heat | fever.

Side view schematically showing sandwich panel manufacturing equipment Perspective view showing main parts of sandwich panel manufacturing equipment Plan view showing the configuration of the main part Diagram showing the cross-sectional structure of the main part in the width direction The figure explaining the advantage of the structure by this invention The figure which shows another embodiment of a lifting means

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Upper surface material 2 Lower surface material 12 Mixing head 13 Nip roller 14 Double conveyor 16 Injection stand 20 1st bar member 21 2nd bar member 22 Bar member

Claims (6)

A sandwich panel manufacturing method for manufacturing a band-shaped sandwich panel in which a foamable resin core material is foam-molded between face materials arranged oppositely on both upper and lower surfaces,
Supplying a foamed stock solution composition of a foamable resin core material between the belt-like lower surface material and the belt-like upper surface material to be conveyed;
After supplying the foaming stock solution composition, lifting the both ends in the width direction on the back side of the belt-like bottom material upward,
And a step of conveying the lower surface material and the upper surface material while performing the foaming treatment of the supplied foam concentrate solution composition.   After supplying the foaming concentrate composition, the method includes a step of supplying the upper surface material above the lower surface material and pressing the upper surface material from above, and after this step, a step of lifting the both ends in the width direction is performed. The method for manufacturing a sandwich panel according to claim 1. A sandwich panel manufacturing facility for manufacturing a band-shaped sandwich panel in which a foamable resin core material is foam-molded between face materials arranged on both upper and lower surfaces,
A stock solution supply unit for supplying a foamed stock solution composition of a foamable resin core material between the strip-shaped bottom surface material and the strip-shaped top surface material to be conveyed;
A lifting means for lifting the both ends in the width direction on the back side of the belt-like bottom material after the foaming stock solution composition is provided on the downstream side of the transport of the stock solution supply unit;
A sandwich panel manufacturing facility comprising: a foam conveying section for conveying the lower surface material and the upper surface material while performing the foaming treatment of the supplied foaming stock composition.   The sandwich panel manufacturing equipment according to claim 3, wherein the lifting means is a bar member arranged in parallel with the conveying direction.   5. The sandwich panel manufacturing equipment according to claim 4, wherein the bar member has a circular cross section.   The sandwich panel manufacturing equipment according to claim 4, wherein the bar member has a triangular cross section and is arranged to be lifted upward as it goes outward in the width direction.

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