JPS644886B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing an assembly core material used for top plates of counters, sinks, washstands, etc.

Traditionally, the core materials used for the tops of counters, sinks, wash basins, etc., have been assembled from veneer materials such as plywood and particle board by bonding or assembly, but there are differences in the thickness of the veneer materials themselves. Due to machining errors in cutting the veneer, dimensional accuracy cannot be achieved, and for example, it is impossible to achieve dimensional accuracy of ±0.5m/m or less for the assembled dimension l.
When a plurality of counters and the like using the core material are arranged in a row, a difference in level occurs at the abutting portion, which causes a problem of extremely poor appearance.

Furthermore, when the contact angle between the veneer materials is a right angle, no secondary processing is required, but when the angle is other than a right angle or is curved, secondary processing, such as cutting or other parts, is required. The drawback was that it required adhesive bonding, etc., and the number of steps and processing costs were high.

The present invention provides a method for manufacturing an assembled core material that eliminates these conventional drawbacks.

The present invention will be described in detail with reference to the drawings.
FIG. 1 is a sectional view showing one embodiment of the invention, in which surface plates 21, 22, and 23, which can be attached and detached from each other, are arranged in series, and an elastic body 22' and a surface plate 23 are provided above the surface plate 22. An elastic body 23' is integrated into the corner of the veneer so as to match the shape of the end of the veneer material. surface plate 21,
22 and 23 are brought into contact with the veneer materials 1, 2, and 3,
Compression jigs 4', 5', 6', and 7' connected to air cylinders 4, 5, 6, and 7 compress the surfaces of the surface plates, respectively, to fix the positions. Next, veneer material 2
and 3 and 1 and 2, a thermosetting resin 8 having excellent adhesiveness and good fluidity is injected and cured to obtain an assembled core material 9 .

Veneer materials include plywood, particle board,
In addition to single materials such as fiberboard, hollow core materials with these materials used on the surface, or synthetic resin foams such as polystyrene resin foams, polyurethane resin foams, polyolefin resin foams, phenolic resin foams, etc. A composite material in which a metal plate such as a steel plate or an aluminum plate is integrated with a wood veneer material, or a composite material in which a synthetic resin foam as described above is integrated can be used.

In the embodiment shown in Fig. 1, the end shape of the veneer material was curved and protruding, but this is just one example, and the end shape as shown in Figs. 4 and 5 also This can be handled by changing the notch shape of the surface plate and the end shape of the elastic body.

As the thermosetting resin to be injected into the void, polyurethane resins, epoxy resins, epoxy acrylate resins, curable acrylic resins, unsaturated polyester resins, etc., which have good adhesive properties and excellent fluidity, can be used. In addition to the method of filling only the gap as shown in FIG. 1, the injection state is such that it is possible to improve the bonding strength between the veneer materials 10 and 11 or 11 and 12.
A method may also be adopted in which the molding jigs 24, 25, 25' or the like are used to integrate the upper part of the gap.
Furthermore, various fibers such as asbestos fiber, glass fiber, etc. may be mixed into the thermosetting resin for the purpose of improving the mechanical rigidity and strength of the resin layer as well as the bonding strength between the veneer materials. Alternatively, for the purpose of reducing the usage ratio of the resin amount, it is also possible to mix various foaming agents and increase the amount of foaming during the resin curing process.

The elastic body has spring hardness (JISA6301, A type)
Synthetic resin elastic bodies or rubber elastic bodies with a diameter of 50 to 90 are suitable, but silicone rubber elastic bodies, silicone resin elastic bodies, and fluorine-based synthetic resin elastic bodies such as tetrafluoropolyethylene (TFPE) are suitable. Since it has self-surface releasability, it can be used as a raw material without any surface treatment. In addition, if it is a synthetic resin elastic body or a rubber elastic body that does not have self-surface mold release properties other than these, a mold release agent such as a silicone mold release agent may be applied to the surface of the elastic body before use. Regarding the surface plate, in addition to the continuous type as shown in FIG. 1, a non-continuous type as shown in FIG. 6 can be used.

According to the manufacturing method of the assembled core material of the present invention, even if there is a thickness error in the veneer material itself or a processing error occurs in the cutting process of the veneer material itself, it can be crimped onto a precisely machined surface plate. After that, they are integrated by resin injection and resin curing, which has the effect of absorbing and digesting the errors inherent in these materials themselves, making it possible to obtain a dimensional accuracy of ±0.3 m/m, which was previously unattainable. Furthermore, even if the veneer material is insufficient in size or thickness, the resin can be injected into the gap, so finishing processing can be carried out without any problems in external dimensions.
Similarly, in this manufacturing method, after pressing the veneer material, resin injection,
Because the resin is cured, it is possible to adjust the position and dimensions in advance, reducing defects caused by incorrect installation positions, etc. In addition, since the surface shape of the elastic body is transferred to the joint part of the core material, it is possible to adjust the position and dimensions in advance. Even if it is a convex shape or a complex curved shape, it can be modeled through a single process of resin injection and resin curing, and it can be shaped using conventional methods such as cutting, adhering a patch, or polishing. Secondary steps such as
In addition, when the end of the veneer material is crimped to the surface of the elastic body as shown in Figure 1, the shape of the end face of the veneer material can be changed as long as the end face of the veneer material is in contact with the surface of the elastic body. It has the advantage of being able to use a variety of veneer materials. Furthermore, if a surface plate is used in which the entire end of the veneer material is in contact with the elastic body as shown in Figure 6, the surface of one veneer material and the surface of the other veneer material will be separated depending on the degree of pushing of the veneer material into the elastic body. It is possible to process assembled products with different steps from the edges of the plate material. Therefore, the same surface plate can be used for various assemblies and processes, making it possible to produce a wide variety of products.

Moreover, since the resin liquid is injected into the gap created by the edges and edges of the veneer material being in close contact with the surface of the elastic body, the sealing performance is high, and the resin liquid is applied to the contact surface between the surface plate and the core material. It does not seep in and contaminate the surface of the surface plate and the vicinity of the core joint. Therefore, you can omit work such as wiping off dirt after work.

As described above, the present invention provides excellent effects, and its benefits are significant.

[Brief explanation of drawings]

Fig. 1 shows a surface plate 21, a surface plate 22 with an integrated elastic body 22' on the upper part, and a surface plate 23 with an elastic body 23' integrated on the corner part. After 1, 2, and 3 are pressed by a pressing tool connected to a cylinder, thermosetting resin 8 is injected into the gaps between the veneer materials and hardened to create an assembled core material 9 , 2nd sectional view. The figure is a cross-sectional view of a state in which a surface plate 26 and a surface plate 27 with elastic bodies 27' and 27'' integrated at the corners are installed in series, and casting jigs 24, 25, and 25' are used. The figure is a cross-sectional view of the assembled core material 9 created in the process shown in Figure 1, Figure 4 is a cross-sectional view of the uncurved veneer materials 13, 14, and 15 being assembled and processed, and Figure 5 is a cross-sectional view of the assembled core material 9 created in the process shown in Figure 1. Veneer material 16 that has a curved surface and does not protrude
Fig. 6 is a cross-sectional view of the processing state of an assembled core material using a non-continuous type surface plate 32, Fig. 7, Fig. 8, Fig. 9, Fig. 10. The figures are state diagrams showing the state of the surface plate in which no veneer material is placed in FIGS. 1, 2, 4, and 5, respectively. 1, 2, 3, 10, 11, 12, 13, 14,
15, 16, 17, 18, 19, 20...Single plate material, 4,5,6,7...Air cylinder, 4',
5', 6', 7'... Pressing jig, 8... Thermosetting resin, 9 ... Assembly core material, 21, 22, 23, 2
6, 27, 28, 29, 30, 31, 32...Surface plate, 22', 23', 27', 27'', 29', 2
9″, 31′, 31″, 32′...Elastic body, 24, 2
5, 25'...Casting jig.

Claims (1)

[Claims] 1. When arranging a plurality of veneer materials on a substantially L-shaped surface plate with elastic bodies arranged at least at the inner corners, the gaps between the veneer materials are located in the elastic bodies, and the gaps are filled with the gaps between the veneer materials. A method for producing an assembled core material, which is characterized by assembling by injecting and curing a thermosetting resin.