JPH0919941A - Interior material and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the boundary between a skin material and a base material from becoming unclear through the imbedding of the terminal end of the terminal part of the skin material in the base material in a door trim equipped with the skin material pasted to a predetermined site of the surface of a synthetic resin base material. SOLUTION: In a door trim, in which a film 13 made of the same material as that of a base material 11 and extending from the surface of the base material 11 to the rear surface side of the terminal part 12a of a skin material 12 is interposed at the joining part between the terminal part 12a of a skin material 12 and the surface of the base material 11, the film 13 prevents some part of a synthetic resin from penetrating from the terminal part 12a of the skin material 12 to the surface side and the terminal end of the terminal part 12a from imbedding within the base material 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an interior material for a vehicle interior, a vehicle door trim, etc., which is made of a synthetic resin as a base material.

[0002]

2. Description of the Related Art As one type of interior material, a synthetic resin base material formed into a predetermined shape, and a skin material made of various materials that is attached to the surface of the base material and covers a predetermined portion of the same surface There is an interior material that is equipped with. A typical example of such an interior material is a vehicle door trim, and an example thereof and a manufacturing method thereof are shown in FIGS. 6 and 7. The door trim 10A is composed of a synthetic resin base material 11 and a skin material 12 of various materials attached to a predetermined portion of the surface of the base material 11, and using a molding die 20 shown in FIG. Manufactured.

That is, as shown in FIG. 7, the molding die 20 comprises a first die 21 such as a lower die having a front die surface and a second die 22 such as an upper die having a back side die surface. In the molding, when molding, the skin material 12 is first arranged on the mold surface of the first mold 21 along a predetermined portion thereof, and then the second mold 22 is first molded.
A method is used in which the mold 21 is polymerized and the synthetic resin is injected into the cavity 23 of the mold 20.

[0004]

By the way, in the door trim 10A, the terminal portion 12a of the skin material 12 is buried in the joint portion with the base material 11, and the base material 1
In many cases, the boundary between 1 and the end portion 12a of the skin material 12 is not beautifully finished in the intended state. The reason why such a state occurs is that when a synthetic resin is injected into the molding die 20, a part of the synthetic resin is placed on the die surface of the first die 21 from the end of the end portion of the skin material 12a of the same die. It is considered that this is because the terminal portion 12a of the skin material 12 is embedded in the base material 11 due to the synthetic resin 11a that has entered the mold surface side of the substrate 21.

Therefore, an object of the present invention is to prevent the end of the end portion of the skin material from being buried inside the base material in the interior material such as the door trim 10A of the type, and the skin material and the base material at the joint portion. The purpose of the present invention is to provide a beautiful interior material having a clear boundary with, and to provide a manufacturing method capable of suitably manufacturing the interior material.

[0006]

Means for Solving the Problems A first invention of the present invention is:
The present invention relates to an interior material comprising a synthetic resin base material formed in a predetermined shape, and a skin material made of various materials that is attached to the surface of the base material and covers a predetermined portion of the same surface. The material has a thin film, which is formed of the same material as the base material and extends from the surface of the base material to the back surface side of the end portion of the skin material, at the joint between the end portion of the skin material and the surface of the base material. It is characterized by being present.

A second aspect of the present invention is to arrange the skin material along a predetermined portion of a mold surface of one of the molds for forming the base material and to form the skin material. The thin film is arranged on the back surface of the end portion of the mold in a state of slightly protruding from the back surface to the mold surface side, and then the other mold of the molding mold is polymerized to the one mold to form a cavity between these molds. It is characterized in that a synthetic resin for forming the base material is injected into and solidified.

[0008]

In the interior material according to the first aspect of the present invention, at the joint between the end portion of the skin material and the surface of the base material, the surface extends from the surface to the back side of the end portion of the skin material. Since the thin film is interposed, the thin film prevents the synthetic resin forming the base material from entering the surface of the end portion of the skin material. For this reason, a part of the synthetic resin does not enter the surface of the end portion of the skin material and bury its end, and since the thin film is the same material as the base material, Is integrated with. Therefore, in the interior material, the end of the end portion of the skin material is not embedded in the base material, and the boundary between the skin material and the base material at the joint portion is clear and is a beautiful interior material.

Further, according to the manufacturing method of the second aspect of the present invention, prior to the injection of the synthetic resin into the cavity of the molding die, one of the molding dies is made to follow a predetermined portion of the die surface. Since the thin film is placed on the back surface of the end of the placed skin material with the mold surface slightly protruding, when the synthetic resin is injected into the cavity, the thin film is It prevents the terminal portion from entering the surface and prevents the end of the terminal portion of the skin material from being embedded in the base material. Therefore, if the manufacturing method is adopted, the interior material can be preferably manufactured.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIGS. 1 and 2 show a vehicle door trim 10B which is an interior material according to an embodiment of the present invention, and FIGS. Shows a method of manufacturing the door trim 10B. The door trim 10B includes a base material 11 made of a thermoplastic synthetic resin such as acrylonitrile butadiene styrene resin or polypropylene resin, and a skin material 1 made of synthetic leather or woven fabric.
2 and a film 13 made of the same material as the base material 11. The base material 11 is formed into an outer shape that substantially follows the surface of the inner panel of the vehicle door.
The skin material 12 is attached to a predetermined portion of the surface of the. The film 13 has a predetermined width and extends to the front surface of the base material 11 and the back surface side of the end portion 12a of the skin material 12 at the joint between the surface of the base material 11 and the end portion 12a of the skin material 12. However, they are interposed between the both 11 and 12. The skin material 12 and the film 13 are integrally attached to the surface of the base material 11.

The door trim 10B is manufactured by the manufacturing method shown in FIGS. 3 to 5. In these drawings, a molding die 20 is a first die 21 such as a lower die and a second die 21 such as an upper die. A mold 22 is provided, and the door trim 10B is provided on the inner surface of the first mold 21.
Is formed on the inner surface of the second mold 22, and a mold surface for molding the back surface of the door trim 10B is formed on the inner surface of the second mold 22. These molds 21 and 22 are polymerized with each other to form a cavity 23 between the mold surfaces. In addition,
The first mold 21 has a large number of negative pressure supply passages 21 for vacuuming.
a and a cooling water supply passage 21b for supplying cooling water are formed. Each of the negative pressure supply passages 21a is opened at the site where the skin material 12 is provided on the die surface of the first die 21, and the cooling water supply passage 21b is arranged at the die surface of the first die 21. Facing near the installation site.

A door trim 10 is manufactured by using the molding die 20.
In order to manufacture B, first, as shown in FIGS. 3 and 4, the skin material 12 is arranged at a predetermined site on the mold surface of the first mold 21, and the back surface side of the terminal portion 12a of the skin material 12 is arranged. Place the film 13 on the surface and slightly project it toward the mold surface.
After that, negative pressure is supplied to the portion where the skin material 12 and the film 13 are arranged through the negative pressure supply passage 21a. As a result, the skin material 12 is adsorbed to a predetermined portion of the mold surface, and the film 13 is adsorbed to the end portion 12 a of the skin material 12. Further, the second mold 22 is polymerized while continuing the negative pressure supply to the first mold 21, and the cooling water is supplied to the first mold 21 through the cooling water supply passage 21b. The molten synthetic resin is injected into the cavity 23 through the supply passage 22a, and then the injected synthetic resin is cooled and solidified. During this time, the film 13 has its heating action from the injected synthetic resin reduced by the cooling action of the cooling water to prevent thermal melting, and a part of the synthetic resin penetrates from the terminal portion 12a of the skin material 12 to the surface side. Prevent the.

In the door trim 10B manufactured as described above, the end portion 12 of the skin material 12 is cut from the surface of the base material 11.
Due to the synthetic resin invasion-preventing action of the film 13 extending to the back surface side of a, a part of the synthetic resin is used as the end portion 12 of the skin material 12.
It does not penetrate into the surface side of a and bury its end, and since the film 13 is made of the same material as the base material 11, it is integrated with the base material 11 at the time of molding. Therefore, in the door trim 10B, the end of the end portion 12a of the skin material 12 is surely exposed at the joint portion with the base material 11, and the boundary between the skin material 12 and the surface of the base material 11 at the joint portion is clear. And it becomes a beautiful door trim.

[Brief description of the drawings]

FIG. 1 is a vertical sectional side view of a door trim which is an interior material according to an embodiment of the present invention.

FIG. 2 is an enlarged vertical sectional view of a portion indicated by an arrow 2 in FIG. 1 in the door trim.

FIG. 3 is a cross-sectional view showing a state in which a skin material and a film of a first mold constituting a molding die used for manufacturing the door trim are arranged.

FIG. 4 is a partially enlarged perspective view showing a terminal portion of the skin material in the first mold.

FIG. 5 is a sectional view of a state immediately before injecting a synthetic resin into a cavity of the mold.

FIG. 6 is a vertical cross-sectional view corresponding to FIG. 2 corresponding to a portion surrounded by a chain line in FIG. 7 of a conventional door trim.

FIG. 7 is a sectional view corresponding to FIG. 3 in the mold for the door trim.

[Explanation of symbols]

10A, 10B ... Door trim (interior material), 11 ... Base material,
12 ... Skin material, 12a ... Terminal part, 13 ... Film (thin film), 20 ... Mold, 21 ... First mold, 21a ... Negative pressure supply passage, 21b ... Cooling water supply passage, 22 ... Second mold, Two
2a ... Synthetic resin supply passage, 23 ... Cavity.

Claims (2)

[Claims] 1. An interior material comprising a base material made of a synthetic resin formed in a predetermined shape, and a skin material made of various materials that is attached to the surface of the base material and covers a predetermined portion of the surface. ,
At the joint between the end portion of the skin material and the surface of the base material, there is interposed a thin film of the same material as the base material and extending from the surface of the base material to the back surface side of the end portion of the skin material. Characteristic interior material. 2. An interior material comprising a base material made of a synthetic resin formed in a predetermined shape, and a skin material made of various materials that is attached to the surface of the base material and covers a predetermined portion of the surface. It is a manufacturing method, while arranging the skin material along a predetermined portion of the mold surface of one of the molds forming the base material, the thin film on the back surface of the end portion of the skin material. A synthetic resin that is arranged so as to slightly project from the back surface to the mold surface side, and then the other mold of the molding mold is polymerized into the one mold to form the base material in the cavity between these molds. A method for producing an interior material, which comprises injecting and solidifying.