JPS6357477B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a formwork panel in which two types of first and second face materials having different levels of dielectric properties are adhered to both sides of a metal formwork.

In contrast to conventional formwork panels, which are constructed by screwing facing materials onto both sides of a metal formwork, the formwork panel that is the object of the present invention, in which facing materials are bonded to the metal formwork, is superior in terms of concentrated loads. There is. By the way, when the surface material is something with dielectric properties such as an asbestos cement board, a gypsum board, or a wood wool board, the method of adhesion is to apply a high frequency voltage and harden the adhesive by internal heat generation. The so-called dielectric bonding method, which applies a high-frequency voltage to instantly complete bonding, is superior in that curing the adhesive by external heating requires time for heat conduction. However, when bonding a face material with low dielectric properties and a face material with high dielectric properties to both sides of a metal formwork using the dielectric bonding method, the face material with high dielectric properties generates internal heat faster than the face material with low dielectric properties, so the dielectric properties change. The uncured adhesive formed between the tall face material and the formwork heats up quickly and hardens quickly. Therefore, due to the difference in dielectric properties, adhesion does not finish at the same time. There is a problem that the facing material with high dielectric properties is subject to thermal deterioration before the facing material with low dielectric properties is completely bonded.

This invention has been made to solve the above problems.

The present invention will be explained below based on the drawings.

First, the object of the present invention will be explained. In FIG. 1, which is shown as an example of the object of the present invention, a metal formwork 2 is constructed by assembling a shaped steel 1 having a U-shaped cross section into a rectangular shape. Face materials 4 are adhered to both surfaces of this metal formwork 2 with hardened adhesive layers 3a and 3b, thereby forming a formwork panel according to the object of the present invention. Here, one of the facing materials 4 has different dielectric properties compared to the other facing material 4, and the facing material having high dielectric properties is used as the first facing material 4a.
The surface material 4b has low dielectric properties.
Here, as the first surface material 4a, for example, an asbestos cement board or a wood wool board having high dielectric properties is used, based on the gypsum board used as the second surface material 4b, and a formwork panel having such a structure is used. are used as exterior wall panels for houses. For example, the first surface material 4a is used for the outdoor side and the second surface material 4b is used for the indoor side.

Note that as the adhesive, a thermosetting epoxy, resorcinol, or urea adhesive is used.

Next, referring to the device used for dielectric bonding, high-frequency electrode plates 5, 5 are arranged on the upper and lower sides, a heater is embedded in one of the high-frequency electrode plates 5, and the first electrode plate 5a is
and the other is a second electrode plate 5b, and the first electrode plate 5a has a function as an external heating source by heat conduction.

Next, the adhesion process will be explained. The feature here is that it consists of two steps, and the first step is to overlay a first surface material 4a with high dielectric properties on one side of the metal formwork 2 via an uncured adhesive layer 3a. The first surface material 4a of the pressure body 6 is placed on the second electrode 5b side, and the pressure body 6 is sandwiched between the first and second electrode plates 5a and 5b, and is then pressed by the clamping force of the mold plate of the press. Apply pressure. At this time, the heater of the first electrode plate 5a generates heat, high frequency voltage is applied to the first electrode plate 5a and the second electrode plate 5b, and the metal formwork 2 is exposed to the heat of the heater of the first electrode plate 5a. Conductively heated and uncured adhesive layer 3a
is heated and cured, and the first surface material 4a is bonded. This first
The adhesion of the face material 4a is accelerated by the heat of the first face material 4a generated internally by the high frequency voltage, thereby shortening the adhesion time. In the second step, the metal formwork 2 of the first pressurized body, which has been heated in the first step and has residual heat,
A second surface material 4b to which uncured adhesive has been applied is superimposed to form a second pressure object 7, and this second pressure object 7 is sandwiched between the first electrode plate 5a and the second electrode plate 5b. Press. At this time, a high frequency voltage is applied to the first and second electrode plates 5a and 5b, and the second surface material 4b internally generates heat.
This heat and the heat of the metal formwork 2 heated in the first step heat and harden the adhesive layer 3b that adheres the second surface material 4b, thereby bonding the second surface material 4b. In this case, the application of the high frequency voltage is kept to an extent that does not cause thermal deterioration of the first surface material, and the residual heat of the metal form is used as much as possible to cure the adhesive.

As described above, the present invention provides a method for manufacturing a formwork panel in which two types of first and second side materials having different levels of dielectric properties are adhered to both sides of a metal formwork. A heater is embedded in one of the plates to serve as the first electrode plate, and the other is used as the second electrode plate.
In the process, one side of the metal formwork and the above first one with high dielectric properties
The first face material of the first pressurized body, which is constructed by overlapping face materials with an uncured adhesive layer interposed therebetween, is placed on the second electrode plate side and is sandwiched between the first and second electrode plates. The first pressurized body is heated while the heater of the first electrode plate generates heat.
After applying a high frequency voltage to the second electrode plate and pressurizing it, in a second step, the first
The remaining heat from the metal formwork etc. heated in the process is used to heat and harden the adhesive layer for bonding the second surface material.
This has the effect of suppressing thermal deterioration of the second surface material, which has low dielectric properties, and allowing bonding.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an example of the object of the present invention,
FIG. 2 is a schematic front view of an apparatus according to the method of the present invention, FIG. 3 is a sectional view showing the first step, and FIG. 4 is a sectional view showing the second step. 2...Metal formwork, 3a, 3b...Adhesive layer, 5a, 5
b...electrode plate, 4a, 4b...face material.

Claims (1)

[Claims] 1. There are differences in dielectric properties on both sides of the metal formwork. 2.
A formwork panel formed by adhering the first and second side materials of seeds is sandwiched between two high-frequency electrode plates and heated.
A method for manufacturing a formwork panel to be crimped, in which a heater is embedded in one side of the high-frequency electrode plate to serve as the first electrode plate, the other side is used as the second electrode plate, and in the first step, one side of the metal formwork and a heater with high dielectric properties are embedded. The first pressurized body is configured by overlapping the first surface material with an uncured adhesive layer interposed therebetween.
After arranging the face material side on the second electrode side and applying high frequency voltage to the first and second electrode plates while generating heat with the heater of the first electrode to apply pressure and crimping, in a second step,
A second surface material with low dielectric properties is arranged on the other surface of the metal formwork of the first pressure body with an uncured adhesive interposed therebetween to form a second pressure body, and this is attached to the electrode plate. A method for producing a formwork panel characterized by heating and crimping by applying a high frequency voltage between the panels.