JPH02202444A - Internal trim part for automobile - Google Patents

Abstract

PURPOSE:To obtain the above internal trim part which is excellent in dimensional precision without causing a warpage and difficult to be subjected to deformation due to heat and capable of being easily manufactured in a short time by constituting the internal trim part of both the surface material for a decorative sheet made of natural wood and a core material made of resin material. CONSTITUTION:Both a cavity mold 1 and a core mold 2 for injection molding are prepared. A decorative sheet 3 made of Japanese beech is introduced into the cavity mold 1. The face becoming a design surface in a completed molded article is brought into contact with the molding face of the cavity mold 1. Then both the cavity mold 1 and the core mold 2 are together closed in a die and molten ABS resin is supplied to the gap between the decorative sheet 3 and the molding face of the core mold 2 and thereafter injection molding is performed. After molding is finished, the die is opened and a lamellate internal trim part is taken out. Both the decorative sheet of the surface material and the resin material of the core material are completely joined and thereby peeling is not generated in the interval thereof. Besides this internal trim part can be directly utilized without cutting the mold article. The projections 6 shown in the core material 5 made of resin material are molded simultaneously in the molding of the internal trim part 4 and provided in order to make fitting thereof easy.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a designed product used for decoration. More specifically, the present invention relates to an automobile interior component comprising a decorative laminate surface material made of natural wood and a core material made of a resin material.

(Prior art) Interior products with a wooden surface used for decorative purposes in automobiles and buildings are made of -C, a surface material made of a decorative veneer of natural wood, and a core material made of a plurality of thin wooden boards. Become. The decorative veneer used has a thickness of O, 1 to 1.0, and the core material is a laminate of three pieces having the same thickness as the decorative veneer. In general, as a measure to prevent the warping that is inherent in wooden products, thin sheets for the core material are usually laminated so that the grain directions of the thin sheets alternately intersect at right angles. Furthermore, if it is necessary to strengthen the design, one or more thin metal plates may be inserted between each wooden slat.

Such wooden interior products are manufactured through the following steps.

(1) Apply adhesive to the surfaces to be laminated of the decorative veneer and the required number of core thin sheets.

(2) Layer the decorative veneer coated with adhesive and the core thin board so that the grain direction of the core thin board alternately intersects at right angles.

(3) Place the stacked materials into a mold and perform heat press molding.

(4) The molded interior component is removed from the mold and trimmed to the product shape.

(5) Paint and finish the surface of the decorative veneer.

The interior parts manufactured in this way are attached to the areas to be decorated using adhesives, screws, crimps, etc.

[Problem to be solved by the invention]

Conventional interior products with wood surfaces have had several disadvantages because the entire product is a laminate of natural wood sheets. One of these is that, despite the fact that the grain of the thin core material is alternately orthogonal to each other as a measure to prevent warping,
Because the thin boards are made of wood, the material of each thin board is not uniform, for example, there are differences in the grain condition and drying state.
It is theoretically impossible to completely eliminate warpage in finished products. Another problem is that the dimensional accuracy of the product is insufficient because the thin plate absorbs and releases moisture.

Further, when a product is exposed to high temperatures, for example, when the product is an interior part of a car and the car is parked in the hot sun for a long time, the product is subject to deformation due to the heat. Furthermore, if heat pressing conditions are not good during the production of interior parts, the veneers may separate from each other. In this way, with conventional interior products where the entire product is made of wood, it is not sufficient to maintain uniform quality of the finished product or prevent the product from deforming after being attached to the decorated part. .

Furthermore, conventional wooden interior products require processing before and after hot press molding, that is, bonding the decorative veneer and core thin board before molding, and trimming (cutting) the interior product after molding. It must be manufactured using a complicated manufacturing method,
Long production times were necessarily required. Furthermore, adhesives, screws, clips, etc. have always had to be used to attach the finished interior parts to the areas to be decorated.

The present invention provides an automobile interior product having a wooden surface without the above-mentioned drawbacks, that is, it does not warp, has sufficient dimensional accuracy, is not easily deformed by heat, and can be easily manufactured in a short time. The purpose is to provide interior parts that can be manufactured.

[Means to solve the problem]

The automotive interior product of the present invention is an interior product made of a decorative panel surface material made of natural wood and a core material made of a resin material.

The decorative board used in the interior product of the present invention may be a decorative veneer of natural wood that has been commonly used for wooden interior products. This veneer is, for example, a thin plate of a tree species such as birch or beech, and its thickness is generally 0.1 to 1.0 trm.

The resin material constituting the core material may be any ordinary resin material for molding that can be molded using a mold. For example, resin materials such as acrylonitrile butadiene styrene (ABS), polypropylene, polystyrene, and polyvinyl chloride can be used, and matrix resins (for example, low shrinkage imparting agents can be added to the base resin of unsaturated polyester) can be used. It is possible to use a molding compound such as a sheet molding compound (SMC), which is a mixture of a thermoplastic resin (with the addition of a thermoplastic resin) and fillers and other additives. Thus, the term "resin material" as used in this specification generally refers to resin-based materials that can be molded using a mold. Therefore, the resin material can contain curing agents, antioxidants, heat stabilizers, processing aids, fillers, etc. that are generally added to materials that can be molded using a mold.

The resin material used can be selected depending on the intended use of the interior product. For example, if heat resistance or impact resistance is required, a material with good heat resistance and impact resistance such as ABS resin is used, and if strength is required, a high strength material such as SMC material is used. It would be advantageous to use it.

The interior product of the present invention can be manufactured as follows. First, molds corresponding to a predetermined product shape are prepared, and a natural wood decorative board is fixed to one of the molds. In this case, unformed decorative boards may be used, but
For example, when compression molding is used, it is preferable to use a preformed decorative laminate to ensure more accurate positioning with respect to the mold. Next, a core material is placed between the surface of this decorative laminate opposite to the surface facing the molding surface of the mold to which it is fixed, and the molding surface of the remaining molds. supplies the resin materials that make up the The supply of this resin material is
Depending on the molding method used, this may be done after or before closing the mold. For example, when using injection molding, the mold is closed and then the resin material is supplied, and when compression molding is used, the resin material is supplied and then the mold is closed.
Then, molding is performed. During this time, the decorative board is precisely molded according to the shape of the mold due to the heat of the resin material. After the integral molding of the decorative board and the resin material is completed in this way, the molded product is taken out from the mold.

The interior product of the present invention manufactured in this way can be used directly without cutting after molding, unlike conventional interior products whose entire product is made of wood.

In this case, the surface of the decorative board of the present invention may be painted before use, and in order to make it easier to attach it to the decorated part, it may be attached to the surface to which the resin core material is attached. It is also possible to prepare a means (for example, a protrusion) for this purpose, and this means can be molded at the same time as the integral molding of the interior part.

[For production]

The natural wood decorative board makes the surface of the interior product of the present invention wood-like. The resin material enters the recesses on the surface of the decorative laminate during integral molding of the interior product of the present invention, cools and solidifies, and thereby firmly joins the surface material of the decorative laminate and the core material of the resin material easily and in a short time. do. The resin core material does not warp like a laminate of wooden sheets, does not absorb or release moisture, and is less susceptible to deformation due to heat.
To provide an interior component of the present invention with excellent dimensional accuracy.

[Example] Next, the interior goods of the present invention will be explained in more detail with reference to Examples.

The interior part of this example is a flat plate-shaped interior part for an automobile manufactured using injection molding.

A cavity mold 1 and a core mold 2 for injection molding as shown in FIG. 1 were prepared. A beech decorative board 3 was placed in the cavity mold 1, and the surface that would become the designed surface of the finished molded product was brought into contact with the molding surface of the cavity mold 1. Next, the cavity mold 1 and the core mold 2 are closed together into a mold, and the easily fused A between the decorative board 3 and the molding surface of the core mold 2 is formed.
Injection molding was performed by supplying BS resin. After the molding was completed, the mold was opened and a flat interior part 4 as shown in FIG. 2 was taken out.

In this interior product 4, the thickness of the decorative board 3 and the core material 5 are 0.3 mm and 5 mm, respectively, and the surface of the decorative board is 200 x 1.
It was possible to repeatedly manufacture products with a size of 50 mm and the same shape and dimensions. The decorative board of the surface material and the resin material of the core material were completely joined, and no peeling was observed between them. Moreover, it could be used directly without cutting the molded product. The protrusions 6 seen on the core material 5 made of resin material in FIG. 2 are molded simultaneously with the molding of the interior component 4, and are intended to facilitate attachment of the interior component.

The interior part of this example is an automobile interior part having a curved surface manufactured using compression molding.

Cavity mold 11 for compression molding as shown in Fig. 3
And a core mold 12 was prepared. A preformed beech decorative board 13 was placed in the cavity mold 11 for accurate positioning with respect to the mold.

The SMC material 17 having unsaturated polyester and polystyrene as the matrix resin is placed on the decorative board 13, the core mold 12 is lowered, and a pressure of 30 kg/C-111 is applied to the decorative board 13 and the SMC material 17. Compression molding was performed at the same time. After the molding was completed, the mold was opened and an automobile interior component 14 having a curved surface as shown in FIG. 4 was taken out.

In this interior product 14, the thickness of the decorative board 13 and the core material 15 are 0.3 mm and 5 m+n, respectively, the projected diameter (dimension A in Fig. 4) is 200 mm, and the height (dimension A in Fig. 4) is 200 mm. 8 dimension) was 20 mm.

As in Example 1, products having the same shape and dimensions could be repeatedly manufactured, and the bonding between the decorative laminate of the surface material and the resin material of the core material was perfect. Cutting of the molded product was also unnecessary. In FIG. 4, the protrusion 16 is for facilitating attachment of the interior component, and was molded at the same time as the interior component 14 was molded.

[Effects of the Invention] The automobile interior parts of the present invention have the surface material of the natural wood decorative board and the core material of the resin material integrally molded, and therefore have advantages not found in conventional interior parts made entirely of wood. have That is,
Unlike wood, the resin core material does not warp, and the decorative board is firmly bonded to the core material, so the interior goods of the present invention do not warp. Further, since the core material made of resin material does not absorb or release moisture, the interior component of the present invention does not cause warping as described above, and sufficient dimensional accuracy can be obtained.

This effect becomes noticeable when a high-strength material such as SMC is used. Moreover, since the interior parts of the present invention are molded using a mold, the quality of each product, such as the shape and dimensions, can be maintained uniformly. The interior components of the present invention having a core of resin material are less susceptible to deformation due to heat than conventional interior components made entirely of wood.

Furthermore, the interior parts of the present invention can be integrally molded in a shorter time without going through the complicated steps required to manufacture conventional wooden interior parts, and can be trimmed (
In addition, unlike conventional products that always have to be installed using adhesives or screws, the interior products of the present invention can be used directly without any cutting process. Attachment can be made easier because the means for use can be molded at the same time.

[Brief explanation of the drawing]

FIG. 1 is a schematic longitudinal cross-sectional view of an injection molding mold for producing a flat interior product of the present invention, and FIG. 2 is a schematic longitudinal sectional view of a flat interior product of the present invention manufactured using the mold shown in FIG. Schematic longitudinal sectional view, 3rd
The figure is a schematic vertical cross-sectional view of a compression molding mold for manufacturing the interior component with a curved surface of the present invention, and FIG. 4 is a schematic vertical cross-section of the curved interior component of the present invention manufactured using the mold of FIG. 3. It is a diagram. In the figure, 1.11 is a cavity type, 2.12 is a core type, 4.14 is an interior part, and 17 is a resin material. 3.13 is decorative board, 5.15 is core material,

Claims (1)

[Claims] 1. An automobile interior product comprising a surface material of a decorative board made of natural wood and a core material made of a resin material.