JPH041682B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a top plate mainly used for kitchen counters, etc., and in particular, by devising the molding treatment means of the end surface of the part where the punched hole is formed, mechanical or thermal This is to prevent a decrease in the strength of the action.

In general, the top plate that constitutes the counter of kitchen equipment is made of a material that can withstand the thermal or mechanical conditions of heating appliances such as gas stoves, hot plates, and ovens, as well as water tank appliances for sinks. is required to be used.

Conventionally, this type of top plate has been made of a resin molded product containing a filler, and when installing various types of instruments such as those mentioned above, the top plate itself has a rectangular shape that corresponds to the external shape of the instrument. It is known that a device is configured to have a punch hole such as the above, and to fit and hold each instrument into the punch hole.

However, in the case of a top plate with such a conventional structure, such as one in which a back guard is integrally formed on the back side, the hole portions into which various instruments are fitted are simply cut into squares. Since the cut end surface, that is, the butt end surface, is not processed in any way, the thermal and mechanical strength is increased by the reduction in the cross-sectional area of the surface facing the depth direction of the hole forming part. As a result, there were various concerns regarding the strength of the product, including the installation of the top plate and other handling, shock during transportation, and abnormal heating (overheating) of heating equipment.

Therefore, as a means to compensate for the drawbacks of the top plate of the conventional structure described above, a piece of hardened fiber-reinforced plastic (hereinafter abbreviated as FRP) was added around the end surface of the punched hole formed in the top plate body. It is possible to obtain a reinforcing effect by fixing the edge frame with adhesive, but when installing such an edge frame, it is necessary to make sure that the cut end surface, which is the butt end surface, is a clean, flat surface when cutting the punched hole. If it is not finished properly, the thickness of the adhesive will be uneven, and the edge frame will not be able to be glued accurately and cleanly.In addition, during the gluing process, it will be necessary to apply pressure to the edge frame toward the butt side. This pressure-applying work is extremely difficult in practice because the part to which pressure is applied is the butt end surface, and it is likely to cause poor adhesion, making it unsuitable for practical use.

This invention was invented in view of the various problems mentioned above, and uses a mold to produce a filled resin top plate having a hole into which a heating appliance such as a gas stove or an appliance such as a water tank is inserted. During manufacturing, when injecting and filling the uncured or semi-cured top plate molding resin into the mold, the butt end surface is prepared in advance around the punch-hole molding dummy placed at a predetermined position in the mold. The edge frame body made of hardened FRP is fitted and integrally molded using a conventional method, thereby making it possible to reinforce the end face of the top plate through the hole with FRP. It is.

Hereinafter, this invention will be explained based on the illustrated embodiments. As shown in FIGS. 1 and 2, 1.
1 is a top plate main body made of a filled resin molded product constituting a kitchen counter obtained by a manufacturing method described below. The top plate main body 1 has a back guard 2 integrally formed on its back side, and approximately at the center thereof,
For example, a rectangular punch hole 3 into which a heating appliance H such as a gas stove or a hot plate is fitted is formed, and the end surface 3a of the punch hole 3 is covered with an FRP layer 4 with a thickness of about 4 to 5 mm. It is integrally formed.

That is, in order to manufacture the top plate having the above-mentioned structure according to the present invention, as shown in FIGS.
When placing the rubber punch-hole molding dummy 11 at a predetermined position within the mold, an edge frame body 12 made of hardened FRP is fitted around the dummy 11 using a mold release agent. After tightening (see Figure 3), uncured or semi-hardened top plate molding resin 13 containing a filler is injected into the mold 10 (see Figure 4), and after curing and molding, the molded product is removed. By molding (see FIG. 5) and extracting the dummy 11, a molded top plate as shown in FIGS. 1 and 2 is obtained.

In addition, in the above example, it is important that the matrix resin of the green material for FRP molding has a curing balance that matches the resin containing the filler for top plate molding in advance, and that the resin for the matrix of the raw material for FRP molding is in a semi-cured state. When using prepreg, apply some heat using a trowel or the like to press it down, and layer it around the dummy for forming the punched hole while eliminating voids.

As explained above, when molding a filled resin top plate having a punched hole, a hardened FRP edge frame body forming a butt end surface is placed around a dummy for forming the punched hole in advance. By attaching it and curing the two together at the same time as molding, it is expected that the reliability and strength of the adhesion will be improved compared to conventional methods of reinforcing FRP on the end surface using adhesive.
As a result, it is possible to reliably prevent damage and cracks from occurring due to insufficient strength, and it is possible to obtain a top plate with excellent thermal and mechanical durability.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a main part of a counter equipped with a top plate according to the present invention, and FIG.
Enlarged sectional view of the top plate at line No. 3
Figures 5 to 5 are explanatory diagrams showing the manufacturing process. 1... Top plate body, 2... Back guard, 3... Punch hole portion, 3a... Butt end surface, 4...
FRP layer, 10...Mold, 11...Dummy, 1
2...FRP edge frame body, 13...Resin with filler.

Claims (1)

[Scope of Claims] 1. When manufacturing a filled resin top plate having punched holes into which heating appliances such as gas stoves or appliances such as water tanks are fitted using a mold, a punch is inserted in advance into the mold. After placing the edge frame body made of cured FRP that forms the end surface of the hole at the predetermined hole forming position, uncured or semi-hardened resin containing filler for top plate molding is injected and constantly filled. A manufacturing method for a top plate that is integrally molded using a method. 2. A method for manufacturing a top plate according to claim 1, characterized in that an edge frame made of hardened FRP is fitted and held around a dummy for forming punched holes that is placed in advance in a mold. .