JPH06198791A - Automotive interior trim with decorated surface and forming method thereof - Google Patents

Abstract

PURPOSE:To make it possible to keep rigidity and have cushioning function by foamed resin layer by a method wherein core member is made of hollow rigid resin body, on the surface at visible part side of which both cushioning layer made of foamed resin and surface layer made of non-rigid resin are integrally laminated to each other. CONSTITUTION:In a formed instrument panel pad 40, a visible part 41 has a three layered structure consisting, from its front surface, of non-rigid resin layer 33, foamed resin layer 32 and rigid resin layer 31, while a mounting part side 42 has a single layer structure made of rigid resin layer 31 so as to form a hollow part 43 between both the rigid resin layers 31 and 31. On the visible part side surface of core material 44 consisting of base body layer made of rigid resin 31, cushioning layer 45 made of foamed resin layer 32 and surface layer 46, which is prepared by decorating the surface of the cushioning layer with the non-rigid resin layer 33 are arranged. Accordingly, by providing holes on the mounting part side of the core material, the core material 44 is turned to be structural member as strength member and, at the same time, given a duct function for air conditioning.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle interior part and its molding method.

[0002]

2. Description of the Related Art Conventionally, instrument panel pads,
Since interior surfaces of automobiles such as console lids and glove box lids have exposed surfaces, the surfaces are made of soft resin such as soft vinyl chloride, while the inner surface of the cushion layer and metal made of foamed resin such as polyurethane foam. Alternatively, a core material made of a hard resin is arranged to improve the feel of the surface and to impart an appropriate cushioning effect and rigidity.

[0003]

Conventionally, however, in order to manufacture them, for example, the surface layer is manufactured by slush molding, the core is manufactured by pressing or injection molding, and the foam layer is manufactured by injection foam molding of urethane. It required many steps. That is, the respective constituent layers are separately molded and combined. In addition, in order to reduce the weight of the vehicle body, the console lid and the like are often made to have a hollow structure. In that case, the core material is made to have a hollow structure by assembling these two or more parts. On the other hand, a hollow duct for air conditioning is placed inside the instrument panel pad, but it has the problem that it takes more man-hours such as fixing this separately molded duct to the core material of the instrument panel pad. There is.

[0004]

SUMMARY OF THE INVENTION Therefore, the present invention is intended to provide a vehicle interior part having a novel structure and a method for manufacturing the same, which solves these problems. The invention consists of.

In the first aspect of the invention, (1) the core material is made of a hollow body made of hard resin, and a buffer layer made of foamed resin and a surface layer made of soft resin are integrally laminated and adhered to the visible side surface of the hollow body. It is in the vehicle interior parts of the structure.

In the second invention, (2) a hollow substrate layer made of a hard resin, and a partially laminated multi-layer parison in which a foamed resin layer and a soft resin layer are laminated in this order on a partial surface of the hollow substrate layer, and this parison is prescribed. By sandwiching the part of the parison that changes from a single layer to a multilayer to the outside of the mold with the split mold and blowing compressed air into the parison, a hollow core material is formed by the hollow base layer. A method for forming a vehicle interior part having a decorated surface, characterized in that a buffer layer made of a foamed resin layer and a surface layer made of a soft resin layer are formed on a part of the surface.

[0007]

The present invention will be described below by taking an instrument panel pad as an example. FIG. 1 is a front view of a main part of a hollow molding device used in the present invention, in which the split molds 21 and 22 show cross sections. The blow molding device comprises a die 11 connected to a plurality of extruders (not shown) and a pair of split molds 2.
1, 22 and a compressed air blowing nozzle 60. Three extruders (not shown) are connected to the die 11,
A hard resin layer 31 forming a base layer serving as a core material, a foamed resin layer 32 forming a buffer layer, and a soft resin layer 33 forming a surface layer can be extruded from the respective extruders. A base layer made of an annular hard resin layer 31 is formed, and a foamed resin layer 3 is partially formed on the surface of the base layer.
2 and the soft resin layer 33 are laminated in this order, and the die 11
Therefore, it is possible to extrude the parison P which is partially multi-layered.

The split molds 21, 22 have cavity surfaces 23, 24 on their inner surfaces for defining a desired cavity shape of the instrument panel pad 40, and can be opened and closed by a driving device (not shown). . In the figure,
One of the split molds 21 is provided with a concave cavity surface 23 that defines the shape of the visible side of the instrument panel pad, and the other split mold 22 has a convex cavity that defines the mounting side shape of the core material. A surface 24 is provided. The cavity surface 23 is provided with a desired diaphragm pattern,
It is preferable to decorate the surface of the visible part of the molded product.

Then, as shown in FIG. 2, the partially laminated multi-layered parison P is extruded from the die 11, and when the predetermined length is reached, the split molds 21 and 22 are closed to sandwich the parison P. The blowing nozzle 60 is inserted into the parison P to blow compressed air. At this time, pinch-off is performed so that the part of the parison P that changes from a single layer to a multi-layer by the dividing surfaces of the split molds 21 and 22 is out of the mold, and from the multi-layer to the single-layer at the part that changes from the visible part side to the mounting part side To be An example of a cross section of the instrument panel pad 40 molded in this way is shown in FIG. In the figure, reference numeral 34 is a burr that has been removed from the product by the pinch-off.

The molded instrument panel pad 40 has a three-layer structure including the soft resin layer 33, the foamed resin layer 32, and the hard resin layer 31 on the visible side 41 from the surface, while the mounting side 42 is hard. It is a single layer of the resin layer 31, and has a hollow portion 43 between the hard resin layers 31, 31. That is, a buffer layer 45 formed of a foamed resin layer 32 and a surface layer 46 obtained by decorating the surface of the core material 44 formed of a base layer of a hard resin 31 having a hollow structure with a soft resin layer 33 are provided. ing. Therefore, if a hole (not shown) is provided on the mounting portion side of the core material 44, the core material 44 can be a structural member that is a strength member and can also have a duct function for air conditioning.

As the hard resin 31 constituting the core material 44, any hard plastic capable of hollow molding can be selected, but glass fiber reinforced plastic such as ASG resin, filled plastic such as talc-containing PP. Resins and conventional hard plastics such as PP
O resin, PPS resin, ABS resin, polyolefin resin (PP resin, polybutene resin, etc.) can be used.

As the foamed resin 32 constituting the buffer layer 45, foamed PVC resin, foamed polyolefin resin (P
(E, PP, etc.) can be preferably used.

As the soft resin 33 constituting the surface layer 46, soft PVC resin, polyolefin resin (soft P
E resin, ionomer resin, etc.) can be used. At this time,
If the core material 44, the buffer layer 45, and the surface layer 46 are made of a homogeneous resin such as a polyolefin resin, it is convenient for recycling.

FIG. 4 is an example of a cross section of the console lid 50, which is composed of a surface layer 56 of a soft resin 33, a buffer layer 55 of a foamed resin 32, and a core material 54 having a hollow structure of a hard resin 31 from the front side. There is. In this example,
The hard resin 31 is attached to the lid 50 via the thin hinge portion 52.
It is obvious that the mounting portion 51 made of is integrally formed, but this mounting portion 51 can be easily formed by sandwiching the hinge-corresponding portions with the split type in the manufacturing method.

[0015]

In the vehicle interior component of the present invention, the buffer layer made of foamed resin and the surface layer made of soft resin are integrally provided on the visible side surface of the hard resin core material having the hollow structure as described above. Since the hollow structure of the core material maintains the rigidity, the foamed resin layer provides a cushioning function, and the surface can be arbitrarily decorated with a soft resin. .

The second aspect of the present invention is capable of integrally manufacturing an interior part having a buffer layer and a surface layer having a decorative function on a part of the surface of a core material having a hollow structure in one step. Compared with this, it is possible to significantly reduce the man-hours.

[0017]

[Brief description of drawings]

FIG. 1 is a front view of a main part of an apparatus used in the present invention.

FIG. 2 is a cross-sectional view of a parison.

FIG. 3 is a cross-sectional view of an instrument panel pad molded according to the present invention.

FIG. 4 is a sectional view of a console lid according to another embodiment.

[Explanation of symbols]

 11 dies 21, 22 split dies 23, 24 cavity surface 31 hard resin layer 32 foamed resin layer 33 soft resin layer 34 burr 40 instrument panel pad 41 visible part side 42 mounting part side 43 hollow part 44, 54 core material 45 , 55 Buffer layer 46, 56 Surface layer 50 Console lid

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI Technical display area B29L 22:00 4F 31:58 4F

Claims (2)

[Claims] 1. A surface is characterized in that the core material is made of a hollow body made of hard resin, and a buffer layer made of foamed resin and a surface layer made of soft resin are integrally laminated on the visible side surface of the hollow body. Interior parts for vehicles. 2. A hollow base layer of hard resin, a foam layer and a soft resin are laminated in this order on a part of the surface of the hollow base layer to form a partial multi-layer parison, and this parison is formed into a single piece of the parison with a predetermined split mold. By sandwiching the part that changes from a layer to a multilayer outside the mold and blowing compressed air into the parison, a hollow core material is formed by the hollow base layer and a foam layer is formed on a part of its surface. Forming a surface layer composed of a buffer layer and a soft resin layer, which is characterized in that the method for forming a vehicle interior part having a decorated surface.