JPH0410402B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a fritch manufacturing apparatus.

[Background technology]

As shown in FIG. 1, conventional fritches have a structure between an upper mold 1 having a convexly curved mold surface and a lower mold 2 having a mold surface corresponding to the mold surface of the upper mold 1. Laminated body 3 made by laminating multiple wood veneers with adhesive
It is manufactured by pressing (pressing) between an upper mold 1 and a lower mold 2. The flitch manufactured in this way is made into a decorative veneer by slicing it parallel to the laminated surface. However, with this method, when the laminate 3 is pressed between the upper mold 1 and the lower mold 2, the adhesive does not harden easily, so it has been devised to apply high-frequency dielectric heating during the pressing. It has already been implemented in some places. That is, as shown in FIG. 2, the anode plate 4 of the high frequency electrode is arranged on the convex curved surface of the upper mold 1,
A pair of cathode plates (high-frequency electrodes) 5 are provided between the upper mold 1 and the lower mold 2 so as to face each other across the space between the upper mold 1 and the lower mold 2, and between the upper mold 1 and the lower mold 2, A laminate 6 made of a plurality of wood veneers laminated with adhesive is inserted, and at the same time as pressing, a high frequency is applied between the anode plate 4 and the cathode plate 5, and the laminate 6 is heated by high frequency dielectric to heat the adhesive. Efforts are being made to accelerate curing. In this case, the reason why the cathode plate of the high-frequency electrode is not provided on the lower mold 2 and the cathode plate 5 is provided separately is as follows. That is, if too many wooden veneers are laminated, the deformation by molds 1 and 2 will not be performed sufficiently during pressing, so the wooden veneers are divided into small pieces and laminated.
After pressing a certain portion and applying high frequency,
It is necessary to pile up a new subdivision on top of it, press it, and apply high frequency. If you always want to strongly heat a new subdivision, as shown in FIG.
This is because it is desirable to arrange the cathode plate 5 between the upper mold 1 and the lower mold 2 to perform high frequency dielectric heating. In FIG. 2, 7 is a support arm for the cathode plate 5, and 8 is a high frequency electric field. However, when the anode plate 4 and the cathode plate 5 are positioned as described above, the plate surfaces of the anode plate 4 and the cathode plate 5 are not in a parallel state.
As shown in the schematic diagram, the distance between the anode plate 4 and the cathode plate 5 differs in each part. In FIG. 3, 6 is a laminate. That is, the temperature at the end side 6a of the laminate 6 where the distance is short is high during high frequency heating, and the temperature is low at the central portion 6b where the distance is long, resulting in a phenomenon in which adhesion failure occurs in the central portion 6b. .

[Purpose of the invention]

This invention aims to eliminate such temperature differences.

[Disclosure of the invention]

This invention comprises an upper mold whose mold surface is curved in a convex shape and serves as an anode of a high-frequency electrode, a lower mold which has a concave curved surface corresponding to the mold surface of the upper mold, and an upper mold and a lower mold. A frit is equipped with a high-frequency electrode cathode plate provided between the upper mold and the lower mold, and a laminate of multiple veneers of material is placed in the space between the upper mold and the lower mold, and is converted into a frit by applying pressure and high-frequency dielectric heating. A manufacturing device in which the upper mold has a base having a sharp point at the center of the convex curved part of the mold surface and serving as an anode of a high-frequency electrode, and a lower surface of the base. The object of the present invention is to provide a fritch manufacturing apparatus characterized in that it is comprised of a cover that forms a convexly curved upper mold surface with its own lower surface.

That is, in the manufacturing apparatus of the present invention, the upper mold base, which becomes the anode of the high-frequency electrode, has a pointed structure at the center, so that the base surface and the plate surface of the cathode plate 5 are parallel to that extent. , and the difference in distance between the anode and cathode plates becomes smaller. Therefore,
This reduces the temperature difference between the ends and the center of the stack. That is, in this invention, by making the upper mold have the above-described structure, the surface of the base 10 which becomes the anode and the plate surface of the cathode plate 5, as shown in the schematic diagram of FIG. The cover 12 compensates for the deformation of the mold surface of the upper mold 11 caused by the parallelism, thereby achieving uniform heating of the laminate 6 and ensuring a predetermined clamping between the upper mold 11 and the lower mold 2. It is something.

Next, the present invention will be explained in detail based on examples.

FIG. 5 is a block diagram of an upper mold according to an embodiment of the present invention. That is, this upper mold 11 is composed of a base 10 that serves as an anode of a high-frequency electrode, and a cover 12 that covers the base 10 and forms the mold surface of the upper mold 11 with its lower surface. As shown in the figure, this base 11 is located at the center 1 of the convex curved part of the mold surface of the upper mold 11.
A portion 10a corresponding to 1a is sharp. Fifth
In the figure, 10b is an anode plate forming a part of the base 10. The other parts of this embodiment are the same as the apparatus shown in FIG. 2, so illustration and explanation will be omitted.

In this way, in this fritsch manufacturing apparatus, since the central portion 10a of the base 10, which serves as the anode, is sharp, the sharpness allows the base surface (anode plate surface) of the base 10 and the cathode plate (second (See figure) The plate surface of 5 becomes almost parallel. Therefore, during high frequency dielectric heating,
The difference in temperature between the ends and the center of the laminate is reduced, and the occurrence of poor adhesion in the center is prevented. Note that the mold surface shape of the upper mold 11 is similar to that of the cover 12.
Since this is ensured by , a flitch with a predetermined shape can be obtained by pressing.

In the above embodiment, the base 10 is anodized using the anode plate 10b, but the entire base 10 may be made of an electrode plate material. Further, it is preferable that the material of the cover 12 has a dielectric constant lower than that of the laminate. As such, for example, Diuracon (permittivity = 3.7)
can be given.

〔Effect of the invention〕

Since the flitch manufacturing apparatus of the present invention is configured as described above, it is possible to manufacture a flitch without defective adhesion parts.

[Brief explanation of drawings]

1 and 2 are configuration diagrams of the conventional example, FIG. 3 is an explanatory diagram explaining the relative positions of the anode and cathode of the conventional example, FIG. 4 is an explanatory diagram of the positions of the anode and cathode of the present invention, and FIG. The figure is a configuration diagram of an upper mold according to an embodiment of the present invention. 2...Lower mold, 5...Cathode plate, 10...Base, 1
0a...Central part, 10b...Anode plate, 11...Upper mold, 12...Cover.

Claims (1)

[Claims] 1. An upper mold whose mold surface is curved in a convex manner and serves as an anode of a high-frequency electrode, a lower mold which has a concave curved surface corresponding to the mold surface of this upper mold, and a space between the upper mold and the lower mold. A fritchi manufacturing equipment that is equipped with a high-frequency electrode and cathode plate installed in the upper mold and lower mold, inserts a laminate of multiple material veneers into the space between the upper mold and the lower mold, and applies pressure and high-frequency dielectric heating to form a fritchi. And the upper mold is
A base whose part corresponding to the center of the convex curved part of the mold surface is sharp and serves as an anode of the high-frequency electrode, and a base which covers the lower surface of this base and has a convex curve on its own lower surface. 1. A fritchi manufacturing device comprising: a cover forming a mold surface of a curved upper mold.