JPH0134794B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for vacuum laminating a building board, in which a covering sheet 2 is covered on the surface of a breathable base material 1 except for the central part of the lower surface, and a suction port 3 is protruded from the upper surface. The suction port 3 of the suction device 4 is brought into close contact with the central portion, and the impermeable sheet 5 is applied so as to cover the circumferential surface of the suction port 3 and the base material 1 to which the covering sheet 2 is applied. The present invention relates to a method for vacuum laminating a building board, which is characterized in that a covering sheet 2 and an impermeable sheet 5 are suctioned through a base material 1 at a step.

Conventionally, when forming a construction board in which a covering sheet such as a PVC sheet is adhered to the surface of a base material such as a fiberboard or a foam having irregularities, a covering sheet 2 is applied to the surface of the base material 1. Since it is necessary to apply the coating with good adhesion, as shown in FIG. The suction port 3 is brought into close contact with the lower central part of the base material 1, and the covering sheet 2 is brought into close contact with the surface of the base material 1 along the unevenness of the base material 1 by suctioning the covering sheet 2 through the base material 1 with the suction device 4. That's what I was doing. However, if the end of the covering sheet 2 is extended to cover the circumferential surface of the suction port 3 as shown in FIG. This has the disadvantage that the manufacturing process for architectural boards becomes long. In addition, when suction is performed without extending the end of the covering sheet 2 to the circumferential surface of the suction port 3 as shown in FIG. 2, the suction port 3 and the covering sheet 2
Air enters from the surface of the base material 1 between the suction device 4
Even if suction is applied, the suction of the covering sheet 2 is poor, and as a result, the adhesion of the covering sheet 2 is poor, resulting in problems such as uneven adhesion of the covering sheet 2 after molding and rounding at the real part 7 of the construction board. Ta.

The present invention has been made in view of the above points, and is a construction board that can adhere a coating sheet to the surface of a base material with good adhesion and does not require a post-forming correction process. The object of the present invention is to provide a vacuum laminate forming method.

The present invention will be explained in detail below with reference to Examples. The base material 1 is made of an air-permeable plate material such as a fiberboard or a foam, and has an uneven pattern formed on its surface. Further, as shown in FIG. 3, irregularly shaped real parts 7, 7 are formed on both sides of the base material 1. The covering sheet 2 is formed of a vinyl chloride sheet or the like, and when applying the covering sheet 2 to the surface of the base material 1, the covering sheet 2 is applied to the surface of the base material 1 except for the center part of the lower surface of the base material 1. 2 is applied. Suction device 4
The suction port 3 protrudes upward, and this suction port 3
is closely attached to the center of the base material 1, and the end of the covering sheet 2 is attached to the lower surface of the base material 1 in the vicinity of the circumferential surface of the suction port 3. Next, the impermeable sheet 5 is applied so as to cover the circumferential surface of the suction port 3 and the surface of the base material 1. The impermeable sheet 5 is formed of a thin sheet with excellent heat resistance and flexibility, and preferably a Teflon sheet with a thickness of 10 to 50 μm is used. When the thickness of the Teflon sheet is less than 10 μm, the impermeable sheet 5 is easily torn, and when the thickness exceeds 50 μm, the adhesion of the impermeable sheet 5 to the real part 7 of the base material 1 is complete. This is something that is difficult to do. After applying the impermeable sheet 5, the covering sheet 2 and the impermeable sheet 5 are suctioned through the base material 1 using the suction device 4.
Subsequently, the coating sheet 2 is melted by heating, and the coating sheet 2 is brought into close contact with the surface of the base material 1. Thereafter, the impermeable sheet 5 is removed to obtain a construction board to which the covering sheet 2 is adhered.
Note that an adhesive or the like may be interposed between the covering sheet 2 and the base material 1.

By applying the impermeable sheet 5 all over the circumferential surface of the suction port 3 and covering the base material 1 to which the covering sheet 2 is applied, air can be applied to the periphery of the suction port 3 and the outside. The suction device 4 can perform strong suction without penetrating into the base material 1, and therefore there is no need to cover the end of the covering sheet 2 to the circumferential surface of the suction port 3.

As described above, in the present invention, an impermeable sheet is applied so as to cover the circumferential surface of a suction port and a base material to which a covering sheet is applied, and a suction device is used to pass the covering sheet and the impermeable sheet through the base material. Since the edge of the impermeable sheet covering the base material is attached to the periphery of the suction port, air cannot enter the inside of the base material from the periphery of the suction port or from the outside. This means that the coating sheet can be strongly suctioned with a suction device, and the coating sheet can be adhered to the surface of the base material with good adhesion, thereby eliminating uneven adhesion and rounding of the real part after molding as in the past. It is possible to form architectural boards whose surfaces are uniformly covered with a coating sheet. In addition, the surface of the base material is covered with a covering sheet except for the center part of the lower surface, and the outside of the covering sheet is covered with an impermeable sheet, and this impermeable sheet is attached to the periphery of the suction port, so it is impermeable. The sheet allows strong suction without air leakage, and there is no need for the end of the covering sheet to reach the periphery of the suction port, and there is no need to correct the end of the covering sheet after molding as in the past. It is something.

[Brief explanation of drawings]

FIG. 1 is a schematic sectional view of a conventional example, FIG. 2 is a partially cutaway sectional view of the same, and FIG. 3 is a schematic sectional view of an embodiment of the present invention. 1 is a base material, 2 is a covering sheet, 3 is a suction port, 4 is a suction device, and 5 is an impermeable sheet.

Claims (1)

[Claims] 1. Cover the surface of a breathable base material with a covering sheet except for the central part of the bottom surface, and bring the suction port of a suction device with a suction port protruding from the top surface into close contact with the central part, so that the surrounding surface of the suction port and the covering sheet are covered. 1. A method for vacuum laminating a building board, comprising applying an impermeable sheet to cover the adhered base material, and sucking the covering sheet and the impermeable sheet through the base material using a suction device.