JPH01101132A - Internal trim part for automobile - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of the Invention) The present invention relates to automobile interior parts such as automobile door trims and rear corners, and in particular to automobile interior parts such as automobile door trims and rear corners. Regarding automotive interior parts.

(Prior art and its problems) Recently, hardboard,
In place of molded boards, there is a tendency to use injection-molded resin products, which are lightweight and have excellent moldability.

For example, FIG. 5 shows a conventional example in which a resin core material made of an injection molded body is applied to an automobile door trim. 2, and an intermediate member 3 such as a cloth attached to an appropriate location on the surface side of the resin core material 2. The intermediate member 3 gives an accent to the surface of the door trim, giving it a soft feel.

In order to attach the above-mentioned intermediate member 3 to the resin core material 2, first,
A cloth sheet 5 such as cloth is coated on the surface of the metal plate 4 as a base member, and the peripheral end 5a is attached to the plate 4.
It was folded back and fixed on the back side. After that, the locking claws 6 cut and raised appropriately on the back side of the metal plate 4 are inserted into the mounting holes 2a of the resin core material 2, and then bent and fixed to attach the living member 3.
A common fixing method was to attach it to the surface side of the resin core material 2.

However, in such a mounting structure of the living member 3,
Installation work is very troublesome and requires a lot of man-hours,
Productivity is extremely poor, and the weight of the metal plate increases the total weight of the product, which goes against the weight reduction of vehicles. There were various problems such as a gap being formed between the core material 2 and the living member 3, a sense of unity between the core material 2 and the living member 3 could not be obtained, and the appearance design was inferior.

As a countermeasure to this problem, a method has recently been proposed in which a fabric sheet such as cloth is integrated during injection molding of a resin core material (commonly referred to as an insert injection method).

In this construction method, first, a fabric sheet such as cloth is positioned and set on the mold surface of the movable side template, and then the movable side template is moved to form a cavity between the movable side template and the fixed side template. In this method, a molten resin is injection molded into the cavity to form a resin core material into a desired shape within the cavity, and at the same time, the resin core material and the fabric sheet are integrated.

In this construction method, the biggest problem is to securely position and fix the fabric sheet in a predetermined position. As this fixing means, for example, a method of planting a plurality of needles on the mold surface of the movable side template and fixing the fabric sheet with the needles, or a method of connecting to a vacuum suction device and applying vacuum suction force to the mold of the movable side template. Methods of sabotaging the surface have been proposed, but due to the large amount of resin pressure during injection molding, these methods tend to cause misalignment of the fabric sheet, causing wrinkles etc. on the surface of the fabric sheet.
In addition, there were appearance defects such as meandering of peripheral terminals, and there was an urgent need to solve this problem.

(Object of the Invention) This invention was made in view of the above-mentioned circumstances, and the object of the present invention is to utilize the insert injection method to produce lightweight and moldable interior parts for automobiles. To provide an automobile interior part that securely positions and fixes members and has an excellent appearance and design.

(Structure and Effects of the Invention) In order to achieve the above object, the present invention has the following advantages: After positioning the living member on the movable side template in advance, the cavity formed between the movable side template and the fixed side template is provided. A resin core material is molded into the desired shape by injection molding molten resin inside, and the resin core material and the living member are integrated, and the circumferential groove for accommodating the peripheral end of the living member is inserted into the core. In an automobile interior part formed by recessing the material surface side, the peripheral edge end of the living member is formed along the protrusion provided on the mold surface of the movable mold plate to form the circumferential groove of the core material. The present invention is characterized in that, after the peripheral end of the living member is clamped and held by a clip rail having a substantially U-shaped cross section, the clip rail is embedded and fixed within a resin core material.

That is, since the present invention is based on a resin core material, it is lightweight and has excellent moldability, and in addition, the peripheral end of the living member is accommodated in the circumferential groove of the resin core material, which is aesthetically pleasing. There are various advantages such as.

Roughly speaking, the present invention utilizes the fact that a protruding strip is formed on the mold surface of the movable side template to form the above-mentioned circumferential groove, and a clip rail having a substantially U-shaped cross section is inserted into the protruding strip. By doing this, the peripheral end of the living member is securely and firmly held and fixed, so that the living member does not shift in position due to the resin pressure of the molten resin during injection molding, and the surface of the living member is fixed. Since no wrinkles or the like occur on the surface, it is possible to prevent defects in the appearance of the product as much as possible.

(Description of Embodiments) Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 is a longitudinal sectional view showing an automobile door trim to which the present invention is applied, Figs. 2 and 3 are sectional views explaining the manufacturing process of the same door trim, and Fig. 4 is a clip rail used in the present invention. FIG.

In FIG. 1, the present invention (an automobile door, trim 1
0 is generally composed of a resin core material 11 molded into a desired shape by injection molding, and an intermediate member 12 such as a cloth attached and fixed to the center of the front surface of the resin core material 11.

More specifically, it is desirable that the resin core material 11 be inexpensive, have excellent moldability, and have sufficient mechanical strength, and in consideration of these points, polypropylene resin is preferred.

This resin core material 11 is molded into a curved shape so that the armrest portion 11a and the door waist portion 11b bulge toward the inside of the vehicle interior to give a three-dimensional effect, and if desired, the surface side thereof is drawn. When this is applied, the appearance design quality is greatly improved.

Next, the middle contact member 12 has a PVC resin sheet 14 backed on the back side of a fabric sheet 13 such as cloth, and this middle contact member 12 is preformed by thermoforming so as to match the shape of the living member attachment point. The preformed intermediate contact member 12 is inserted into an injection mold as described later, and when molding the resin core material 11, this resin core material 11 and the intermediate contact member 12 are inserted. Unify.

Roughly speaking, this resin core material 11 is formed with a circumferential groove 15 for accommodating the peripheral edge end portion of the intermediate contact member 12, so that the peripheral edge end portion 12a of the intermediate contact member 12 is hidden, and peripheral irregularities, etc. are not noticeable. That's what I do.

Next, using FIG. 2 and FIG. 3, the above-mentioned automobile door trim 1
The manufacturing process of 0 will be briefly explained.

First, as shown in FIG. 2, the intermediate contact member 12 is positioned and set at a predetermined position on the movable side template 20 of the injection mold. At this time, a projecting strip 21 is formed on the mold surface of the movable mold plate 20 in order to form a circumferential groove 15 in the resin core material 11. A clip rail 22 having a roughly U-shaped cross section is attached to the protruding strip 21 so as to sandwich the protruding strip 21 from above, thereby reliably positioning and fixing the peripheral end 12a of the intermediate member 12. .

Next, as shown in FIG. 3, the movable mold plate 20 is moved closer to the fixed mold plate 23 by the operation of a movable device (not shown), and the inside of the cavity formed between the two mold plates 20 and 23 is moved. Then, molten resin is injected and filled through the sprue 24 from an injection molding machine (not shown).

At this time, the intermediate member 12 is pressed along the mold surface of the movable mold plate 20 due to the resin pressure of the molten resin, but the peripheral end 12a of the intermediate member 12 is reliably supported by the clip rail 22. Therefore, no positional deviation occurs in the intermediate member 12.

As shown in FIG. 4, the clip rail 22 is provided with openings 25 at appropriate intervals, and the molten resin is crowded into the openings 25, and the resin core material 11 is formed by injection molding. At this time, the clip rail 22 is embedded and fixed in the resin core material 11, and the intermediate member 12 is inserted through this opening 25.
The peripheral edge end 12a and the resin core material 11 are firmly joined.

Note that a band-shaped metal plate is fixed along the peripheral end 12a of the intermediate member 12, and a magnet is embedded in the movable side template.
The intermediate member 12 may be reliably positioned at a predetermined location on the movable mold plate by strong magnetic force between the magnet and the band-shaped metal plate.

In this way, the automobile door trim 10 shown in FIG. 1 is manufactured. This door trim 10 is made by integrating the intermediate member 12 made of a fabric sheet such as cloth with the resin core material 11 using the insert injection method. This greatly simplifies the installation work of the intermediate member 12, leading to significant cost reductions and contributing greatly to weight reduction.In addition, when positioning the intermediate member 12, the circumferential By effectively utilizing the groove-forming protrusion 21 and sandwiching the clip rail 22 between the protrusions 21, the intermediate member 12 can be firmly and reliably positioned and held, which is better than the conventional intermediate member. Misalignment in insert injection method.

Conventional problems such as wrinkles can be effectively solved.

In this embodiment, the present invention is applied to an automobile door trim 10, but it is also an automobile interior part such as a rear corner or a quarter biller, in which a living member made of a fabric sheet is attached to a resin core material made of an injection molded body. If it is something to wear,
The present invention may be applied, and the present invention has a wide range of application and is of high practical value.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view showing an example in which the present invention is applied to an automobile door trim, FIGS. 2 and 3 are cross-sectional views explaining the manufacturing process of the automobile door trim, and FIG. 4 is a longitudinal cross-sectional view showing an example in which the present invention is applied to an automobile door trim. FIG. 5 is a cutaway perspective view showing the main parts of the clip rail used, and FIG. 5 is a longitudinal sectional view showing a conventional automobile door trim. 10... Automobile door trim 11... Resin core material 12... Living member 13... Cloth 14... PVC sheet 15... Peripheral groove 20... Movable side template 21...・Convex strip 22...Clip rail 23...Fixed side template 24...Sprue 25...Opening

Claims (1)

[Claims] (1) After positioning the intermediate member on the movable template in advance, mold the resin core into the desired shape by injecting molten resin into the cavity formed between the movable template and the fixed template. death,
In the automobile interior part, the resin core material and the intermediate contact member are integrated, and a circumferential groove for accommodating the peripheral edge end of the intermediate member is recessed on the surface side of the core material, wherein: The peripheral edge end of the intermediate member is positioned along the protrusion provided on the mold surface of the movable side template to form the groove, and the peripheral edge end of the intermediate member is positioned with a clip rail having a substantially U-shaped cross section. An interior part for an automobile, characterized in that the above-mentioned clip rail is embedded and fixed within a resin core material after being clamped and held.