JPS6028594Y2 - decorative board - Google Patents

Description

[Detailed description of the invention] The present invention involves bonding both the front and back sides of a core board such as cardboard with two thick resin sheets larger than the core board, and also attaching upper and lower parts that protrude from the edge of the core board. This invention relates to the improvement of decorative plates in which sheets are stacked one on top of the other and a flange is bonded along the outer periphery, specifically the cover of a file, the exterior plate of a pencil case, etc.

Figure 1 shows an enlarged part of a conventional product, in which adhesive c/, c/ is applied to both the front and back sides of a core board a' such as cardboard, and a soft vinyl chloride sheet is applied to both sides. ', b' are glued together, and the two pieces of the part protruding from the core plate a') b',
, b'1 are welded using high frequency to form the flange part A'.

Therefore, in the conventional product with this structure, the adhesive C' must be applied to the core plate a' one by one, which is time-consuming and has very poor workability, and as shown in FIG. Since the sheets b' and b' could not be adhered to the end faces, there was a defect in that the shape of the flange part A' could not be accurately produced.

The present invention aims to eliminate such defects of conventional products.

The gist of the present invention, which is distantly related to the above object, is to apply a solid adhesive that exerts adhesive force under pressure and heat to the entire joint surface of the sheet, and to apply a solid adhesive to both the front and back surfaces of the core plate and to the side edges. It is made by gluing a sheet to.

Embodiments of the present invention will be described below with reference to FIGS. 2 to 4.

In the figure, A indicates a decorative board according to the present invention, and this decorative board A is made of a core board a made of cardboard, thick paper, etc., which is thick enough to not bend, and two soft synthetic sheets larger than the core board a. It is composed of resin (made of vinyl chloride) sheets b and b, and the sheets b and b are coated with solid adhesives C and C over the entire surface of one side.

These sheets b and b are formed by calendering, and after the forming, a solid adhesive c,
Apply c.

These solid adhesives c and C are polyurethane-based adhesives that do not have adhesive strength at room temperature, but exhibit adhesive strength when pressed and heated.

The above sheets b and b are stacked with their adhesive c and c coated surfaces added to both the front and back surfaces of core plate a, and the solid adhesives C and c are melted by applying heat and pressure to form the core plate a. Glue on both the front and back sides.

(FIG. 4) Also, the outer peripheral edge of the sheet "1tbl" which is a portion protruding from the edge of the core plate a is welded using a high frequency welding machine to form a flange A (dashed line in FIG. 3).

Therefore, the adhesive etc. used is one that can be dissolved by high frequency welding.

Preferably, as will be described later, sheets b, b are adhered to both the front and back surfaces of the core plate a after the flange part A is formed.

When welding these sheets b, , bi, or adhering to the core plate a, sheets b and b on the side end surface a of the core plate a are heated under pressure and bonded, and both the front and back sides of the core plate a are bonded. In addition, the actual actual height A is formed by covering the outer peripheral side end surface a1 with two sheets b, b.

Since the present invention is configured as described above, it has the following effects.

(1) Since the sheet is glued to the side end surface of the core plate, the shaping of the flange is good, and since the flange does not bend from the base as in conventional products, the flange is closer to the base than the base. It will not be damaged.

(2) Since the sheet is coated with a solid adhesive and bonded to the core plate, it is extremely easy to manufacture compared to conventional products in which the sheet is bonded by applying an adhesive to the core plate.

Moreover, wrinkles do not occur in the sheet, and the sheet can be brought into close contact with the entire surface of the core plate without air intervening between the sheet and the core plate.

(3) Furthermore, since an adhesive was used that exerts its adhesive strength when heated and pressurized, the sheet shrinks when the sheet is bonded by heating and pressurizing.

Therefore, if the outer peripheral edges of two sheets are welded in advance and the sheets are bonded to the core plate by heat and pressure, the sheets can be bonded together without wrinkles occurring in the shape of the core plate due to shrinkage of the sheets, resulting in excellent precision. We can provide decorative plates.

[Brief explanation of drawings]

Fig. 1 is a partially enlarged vertical sectional view of the conventional product, Figs. 2 to 4 show the actual height, Fig. 2 is a perspective view, Fig. 3 is a partially enlarged longitudinal sectional view, and Fig. 4 FIG. 2 is a perspective view showing a molding method. In the figure, a shows the core plate, b and b the sheet, c and c the solid adhesive, and a the flange.

Claims (1)

[Scope of utility model registration request] The front and back sides of the core board are glued together with two synthetic resin sheets larger than the core board, and the upper and lower sheets that protrude from the edge of the core board are overlapped and the flange is glued along the outer periphery. In the decorative board to be formed, a solid adhesive that exerts adhesive force under pressure and heat is applied to the entire joint surface of the two sheets, and the sheets are adhered to both the front and back surfaces and side end surfaces of the core board. A decorative board characterized by: