JPH1171970A - Face fiberboard and manufacture of face fiber board and fittings - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the appearance of a product by contacting closely an embossed plastic sheet of prescribed thickness to the surface of a wooden fiberboard molding by vacuum suction and sharpening a deep-drawn edge corner portions. SOLUTION: Fine grain embossments E'1 are formed on the surface of a 100-250 μ-thick plastic sheet 10 such as polyethylene, polypropylene, polyester or polyamide. The plastic sheet 10 is stuck closely by vacuum suction following the molding shape of a wooden fiberboard molding 1A and the shape of the deep-drawn embossment portion. In such case, the plastic sheet 10 is heat softened or an adhesive is applied to the rear side and adhered. And a recess in the low-density portion L of the edge corner portion C produced by deep- drawing is covered to prevent the edge corner portion C from becoming a round corner. When necessary, a coating may be applied to the edge corner portion C, thereby preventing the embossments from standing out and improving the appearance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative fiberboard used as, for example, a face material of a flash door, a method of manufacturing the decorative fiberboard, and a fitting using the decorative fiberboard.

[0002]

2. Description of the Related Art For example, a surface material of a flash door is conventionally formed by molding a wood fiber board, integrally forming a frame portion, a decorative frame portion, and a mirror plate portion, embossing the surface, and then painting if desired. It is manufactured by applying.

[0003]

In the above-mentioned conventional manufacturing method, for example, the decorative frame portion becomes a deep drawn embossed pattern portion, and since a large tensile force is applied to this portion, the fiber of the wood fiber board is pulled. The density of the part may decrease. And such a low-density portion mainly occurs at the edge of the deep drawing embossed pattern portion, but when such a low-density portion occurs at the edge, the edge becomes a round corner,
The sharpness of the deep-drawn embossed pattern portion is lost, and the low-density portion is dented to make the embossed pattern irregular, thereby deteriorating the appearance of the product. When coating the surface of a wood fiber board molded product, the low density portion has higher absorbability of the paint than the other portions, and it is very difficult to apply a large amount of paint to the low density portion and to apply a uniform coating. Difficult.

[0004]

According to the present invention, as a means for solving the above-mentioned conventional problems, a wood fiberboard molded product (1A) having an embossed pattern on its surface and a wood fiberboard molded product (1A) are provided.
A decorative fiberboard (13) comprising a plastic sheet (10) adhered to the surface of the plastic sheet along the molding shape and following the embossed pattern, and the surface of the plastic sheet (10) is provided with an embossed pattern. If desired, the embossed pattern applied to the surface of the wood fiberboard molded product (1A) includes a deep drawn embossed pattern portion and a fine embossed pattern portion, and is applied to the surface of the plastic sheet (10). Has a fine embossed pattern portion. Further, in the present invention, the wood fiber mat (1) is formed into a predetermined shape and the surface thereof is embossed to give a wood fiber board molded product (1A), and then the plastic having the embossed pattern on the surface is formed. Sheet 1
The present invention provides a method for producing a decorative fiberboard (13) in which the decorative fiberboard (13) is adhered to the core material (14) on one side or both sides of the core material (14). .

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention is shown in FIGS. A wood fiber mat (1) is formed by mixing a synthetic resin binder such as phenolic resin with wood fibers produced by defibrating wood chips, and the wood fiber mat (1) is formed as shown in FIG. Mold (17) and lower mold (1
8), and is subjected to press forming and embossing as shown in FIG. 2 to obtain a wood fiber board molded product (1A), as shown in FIG. The left and right vertical frames (2A) and the upper and lower horizontal frames are used for the wood fiberboard molded product (1A).
(2B), the horizontal middle frame part arranged in two steps in the middle part
(3A, 3B), and decorative frame part which is a deep drawing embossed pattern part
End plates (4,5,6) arranged in three stages via (7,8,9)
Are integrally formed, and the decorative frame portions (7, 7) at the boundary between the vertical frame portion (2A) and the end plate portion (4, 5, 6) and the vertical frame portion (2A) and the end plate portion (4, 5, 6) are formed. 8,
9) There is a vertical grain pattern E ₁ which is a fine embossed pattern part, a horizontal frame part (2B), an intermediate frame part (3A, 3B) and a horizontal frame part (2B)
Grain pattern E ₂ of the horizontal pattern ornament frame portion of the boundary between the end plate portion (4, 5, 6) to (7,8,9) is a fine embossed pattern portion is headed as. In the press forming step, a tensile force is applied mainly to the edge C of the decorative frame portion (7, 8, 9), which is the deep drawing embossed pattern portion, and the fiber in that portion is pulled, as shown in FIGS. As shown, a low density portion L (a portion surrounded by a dotted line in FIG. 4) is formed. Thus, the low-density portion L
Is formed, as shown in FIG. 4, the corner C is rounded, the sharpness of the decorative frame (7, 8, 9) is lost, and the low-density portion L is recessed, as shown in FIG. As shown in (1), the embossed pattern interferes with the dent and becomes uneven.

[0006] The wood fiber board molded product (1) which is formed into a predetermined shape as described above and is simultaneously embossed.
A) has air permeability. Therefore, the wood fiber board molded product (1
A) is a perforated plate (20) as shown in FIG.
A base with a large number of suction holes (22) provided on the upper surface
(21), and set on a vacuum crimping die (19), a plastic sheet (10) is superimposed thereon, and a silicone rubber bag (24) supported by a crimping plate (23) is further disposed above the plastic sheet (10). I do. The internal pressure of the silicone rubber bag (24) is usually 3 to 5 kg /
It is set to about cm ^2. Then, the crimping plate (23) is lowered, and the plastic sheet (10) is pressed against the surface of the wood fiber board molded product (1A) by a silicone rubber bag (24) as shown in FIG. Decompression path inside the base (21) of (19)
The pressure is reduced by (25), and the plastic sheet (10) is passed through the suction hole (22) and the porous mold plate (20) to form the wood fiber board molded product.
(1A) It can be adhered to the surface by vacuum suction.

In order to adhere the plastic sheet (10) to the surface of the wood fiberboard molded product (1A), the plastic sheet (1)
0) by heating or softening the wood fiberboard molded product (1).
A) An adhesive is applied to the front surface and / or the back surface of the plastic sheet (10). Further, the plastic sheet (10) may be heated and softened, and an adhesive may be applied to the front surface of the wood fiber board molded product (1A) and / or the back surface of the plastic sheet (10).

The plastic sheet (10) is made of, for example, polyethylene, polypropylene, polyvinyl chloride, polyvinylidene chloride, acrylonitrile-butadiene-styrene copolymer, polybutene, polyester, polyamide, etc., and has a thickness of 100 to 250 μm. And the surface of the plastic sheet (10)
As shown in FIG. 7, fine woodgrain patterns E ′ ₁ and E ′ ₂ are formed in the same direction as the wood grain patterns E ₁ and E ₂ , which are the fine embossed pattern portions on the surface of the wood fiber board molded product (1A). The plastic fine embossed pattern on the surface of the sheet (10) may be the wood-fiber plate mold (1A) grain pattern E ₁ or E ₂ only the same direction of the surface, also the wood-th pattern E _1, E ₂ And the direction may be different. Further, the plastic sheet (10) may be a colored product or a non-colored product (transparent product).

As shown in FIG. 9, the plastic sheet (10) is a molded part of a wood fiber board molded product (1A) and a deep drawn embossed pattern portion by pressing and vacuum pressing with the silicone rubber bag (24). close contact along the shape of Kazariwaku unit (7,8,9), but more closely be modeled in the grain pattern E _1, E ₂ to a fine embossed pattern portion as shown in FIG. 10.
When the plastic sheet (10) is adhered to the surface in this manner, as shown in FIG. 11, a depression due to the low-density portion L of the corner C of the decorative frame portion (7, 8, 9) is formed. And the wood grain patterns E ′ ₁ and E ′ ₂ make them inconspicuous. The wood fiber board molded product (1A) to which the plastic sheet (10) has been applied may be used as a decorative fiber board with the plastic sheet (10) as it is, and then used as a face material of a flash door. The surface of the plastic sheet (10) may be coated.

[0010] The decorative fiberboard (13) thus produced
For example, as shown in FIG. 12, a pair of door surface members are stretched on both sides of a core member (14), and a decorative sheet (10A) is adhered to a peripheral surface thereof. The door (15) is manufactured.

In the above embodiment, since the decorative fiberboard (13) is adhered to both sides of the core (14) as a door surface material, such a flash door (15) can be opened and closed from either side. Used for However, in the present invention, the decorative fiberboard (13)
It is also possible to adhere only to one side of the core material (14) and adhere a flat plate without an embossed pattern to the other side. Also, a desired number of end plates may be arranged vertically and / or horizontally.

[0012]

According to the present invention, as described above, a plastic sheet having an embossed pattern is adhered to the surface of a molded wood fiberboard molded article having an embossed pattern on its surface. Even if a low-density portion exists partially and the embossed pattern of the portion is unclear or irregular, the embossed pattern of the plastic sheet makes the portion unclear and inconspicuous. In addition, when the decorative fiberboard surface is coated, the plastic sheet prevents the paint from penetrating, so that even if the deep drawn portion of the wood fiberboard has a low density, it is uniform regardless of the low density portion. Paint can be applied. Then, when vacuum bonding is applied to bring the plastic sheet into close contact with the surface of the wood fiber board, the plastic sheet adheres along the molding shape of the wood fiber board and follows the emboss pattern.

[Brief description of the drawings]

1 to 13 show an embodiment of the present invention.

FIG. 1 is an explanatory view of a wood fiberboard molded product before molding.

FIG. 2 is an explanatory view after molding of a wood fiber board molded product.

FIG. 3 is a perspective view of a wood fiberboard molded product.

FIG. 4 is an enlarged sectional explanatory view of a corner portion of a decorative frame portion.

FIG. 5 is an enlarged plan view illustrating an edge portion of a decorative frame portion.

FIG. 6 is an explanatory view of a plastic sheet before vacuum pressure bonding.

FIG. 7 is an explanatory view of a plastic sheet after vacuum compression bonding.

FIG. 8 is a perspective view of a plastic sheet.

FIG. 9 is a detailed explanatory view after the plastic sheet is vacuum-compressed.

FIG. 10 is an enlarged cross-sectional explanatory view of a corner portion of a decorative frame portion after vacuum bonding of a plastic sheet.

FIG. 11 is an enlarged plan explanatory view of an edge portion of the decorative frame portion after the plastic sheet is vacuum-pressed.

FIG. 12 is an exploded perspective view of a flash door.

FIG. 13 is a sectional view of a flash door.

[Explanation of symbols]

1A Molded wood fiberboard 2A Vertical frame 2B Horizontal frame 3A Intermediate frame 4,5,6 End plate 7,8,9 Decorative frame 10 Plastic sheet 13 Decorative fiberboard (door surface material) 15 Flash door 16 Press grain pattern E _'1, E' ₂ grain pattern of the plastic sheet of the mold E _1, E ₂ wood fiber plate mold

Claims (8)

[Claims] 1. A molded article made of wood fiberboard having an embossed pattern on its surface, and a plastic sheet adhered to the surface of the molded article made of wood fiberboard along the molding shape and following the embossed pattern. Characterized by an embossed pattern on the surface of the decorative fiberboard 2. The plastic sheet has a thickness of 100 to 2
The decorative fiberboard according to claim 1, which has a thickness of 50 µm. 3. The embossed pattern applied to the surface of the wood fiber board molded article includes a deep drawn embossed pattern portion and a fine embossed pattern portion, and the surface of the plastic sheet is provided with a fine embossed pattern portion. The decorative fiberboard according to claim 1 or 2, wherein 4. A wood fiber mat is formed into a predetermined shape and an embossed pattern is formed on the surface of the mat to form a wood fiber board molded article. Then, the plastic sheet having the embossed pattern on the surface is adhered by vacuum suction. And a method for producing a decorative fiberboard. 5. The plastic sheet has a thickness of 100 to 2
The method for producing a decorative fiberboard according to claim 4, which has a thickness of 50μ. 6. The embossed pattern provided on the surface of the wood fiber board molded product includes a deep drawn embossed pattern portion and a fine embossed pattern portion, and the surface of the plastic sheet is provided with a fine embossed pattern. A method for producing a decorative fiberboard according to claim 4 or 5. 7. A fitting comprising the decorative fiberboard according to claim 1 bonded to one or both sides of a core material. 8. The decorative fiberboard is provided with two V-grooves on the back surface of the left and right edges thereof, and the left and right edges of the decorative fiberboard are bent through the V-grooves to form the core material. The fitting according to claim 7, wherein the fitting is wrapped around and bonded to the back side.