JPS6023980B2 - Manufacturing method of L-shaped counter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for improving the impact strength and bending strength of an L-shaped counter coated with a post-form melamine resin decorative board.

In detail, we use foamed thermosetting resin with adhesive properties such as foamed polyurethane resin or foamed epoxy resin to easily form a foam in the void created at the inwardly bent portion between the melamine resin decorative board and the L-shaped core material that is the adherend. At the same time, an appropriate groove was created on the outside of the joint of the L-shaped core material, and the same foamed thermosetting resin was filled, foamed, and hardened to improve the impact strength of the inner bent part. To provide a highly reliable post-form melamine resin L-shaped counter pasted with a Q-board by improving the bending strength of the rising part. Melamine resin decorative boards have excellent aesthetics and physical properties, such as surface hardness, abrasion resistance, stain resistance, and heat resistance, and are easy to clean, and are already used as decorative materials for furniture and building materials. used in daily life.

An advanced way to use these decorative boards is to produce curved surfaces, which are used as surface rudder materials for counters, sinks, vanities, etc. When bonding this surfaced shelving material to the core material, the core material and the decorative board do not fit perfectly, creating a gap, making it difficult to bond with high reliability. Therefore, as a method to improve this drawback, published patent publication No. 5
4-1383, "Method for inward bending of thermosetting resin decorative laminate", when bonding the thermosetting resin decorative laminate and the base material, the gap created between the decorative laminate and the base material is filled with foamed epoxy resin. A method of filling and adhering using a based composition is described.

In the counter manufactured by this method, the gap between the decorative board and the base material is filled and bonded with foamed epoxy resin, and the impact resistance of the internally bent part is significantly improved compared to conventional products.
In the above method, the same effect can be obtained even if a foamed polyurethane resin is used instead of the foamed epoxy resin. Filling and adhering foamed thermosetting resin with adhesive properties to the gap between the decorative board and the base material not only improves the impact resistance of the inward bending part where the gap exists, but also improves the impact resistance of the countertop's rising part. It was found that the strength against compressive force applied to the rear (base material surface) was significantly improved. However, the strength against the compressive force applied to the front (decorative surface) of the rising portion of the counter cannot be significantly improved. Therefore, as a result of intensive studies, the inventors of the present invention found that when manufacturing the core material of an L-shaped counter, a groove of an appropriate shape was provided on the outside of the joint between the rising member of the L-shaped core material and the deck village. After filling with adhesive foam thermosetting resin such as foam polyurethane resin or foam epoxy resin, foaming and curing, L
A groove of an appropriate shape is provided in the deck core material of the inner bent part of the mold core material, and the groove is filled with the same foamed thermosetting resin as described above, and a thermosetting resin decorative board with bending workability is laminated to make the decorative material. We considered a method of filling and bonding the gap between the board and the L-shaped core material at the inwardly bent portion.

The L-shaped counter manufactured by this method not only has improved impact resistance at the internally bent portion compared to conventional products, but also has increased strength against compression, tension, bending, and other forces applied to the rising portion. This results in a significant improvement in the prevention of damage that can easily occur during handling or transportation.
Next, the present invention will be explained by examples.

A groove with a width of 10 legs and a depth of 5 ribs was provided on the outer joint surface of the L-shaped core material 1 made by joining 24 willow thick plywood with a rubber adhesive, and the groove 2 was filled with foamed polyurethane resin foam light HM-51.
35 (Polyurethane Kasei ■ trademark) is poured, foamed, and hardened.

At that time, a contact plate such as an iron plate is applied to the top surface of the groove as appropriate.
Care should be taken to ensure that the foamed thermosetting resin and the plywood are flush.
A silicone mold release agent is applied in advance to the backing plate, such as an iron plate, to prevent the foamed thermosetting resin from adhering. A groove 3 having a width of 7 ribs and a depth of 5 ribs is provided in the inner bent portion of the L-shaped core village thus manufactured. An appropriate amount of the foamed polyurethane resin described above is poured into the groove, and a post-form melamine resin decorative board is immediately bonded thereto using a rubber adhesive. The void 4 in the inwardly bent portion created at this time is filled and bonded with foamed polyurethane resin. The L-shaped postform counter thus obtained has remarkable physical strength compared to conventional products that do not use foamed thermosetting resin, and has great industrial value. Note that the groove for filling the foamed thermosetting resin provided in the core material may be provided in advance before the core material is assembled, and then the core material may be manufactured. Next, Table 1 shows quality comparison data between the products manufactured according to this example and conventional products. "Table 1" Unit: K2X However, in "Table 1", the strength of the rising part A is when a compressive force is applied in the vertical direction to the rising part from the back side (base material side) to the upper end of the rising part. On the other hand, the strength of the rising part B indicates the strength when a tensile force is applied.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an L-shaped core material according to the present invention, and FIG. 2 is a sectional view of an L-shaped counter filled with foamed thermosetting resin and laminated with a decorative board. In the figure, 1 is an L-shaped core material, 2 is a resin injection groove for reinforcing the rising part, and 3 is
Reference numeral 4 indicates a resin injection groove for reinforcing the inner bent portion, 4 indicates a gap in the inner bent portion, 5 indicates a foamed thermosetting resin, and 6 indicates a post-formed thermosetting resin decorative board. Figure 1 Figure 2

Claims (1)

[Claims] 1. L using wood materials such as plywood and particle board.
When manufacturing the core material for the mold counter, a groove of an appropriate shape is provided on the outside of the joint of the L-shaped core material, and a foamed thermosetting resin with adhesive properties such as foamed polyurethane resin or foamed epoxy resin is applied to the groove. After filling, foaming, and curing, a groove of an appropriate shape is created inside the joint of the L-shaped core material, the same foamed thermosetting resin is filled into the groove, and a post-form melamine resin decorative board is pasted. A method for manufacturing an L-shaped counter, which involves filling and bonding a gap in an inwardly bent portion that occurs between a decorative board and an L-shaped core material.