JPH08118481A - Interior trim part for vehicle and manufacture thereof - Google Patents

Abstract

PURPOSE: To simply strengthen the rigidity of a low-cost outer peripheral flange having weak rigidity in an interior trim part for a vehicle using a rigid urethane core material filled with middle glass fiber and a method for manufacturing the same. CONSTITUTION: After a skin material 30 set on the surface of a cavity mold 40 is coated along the inner surface of the outer peripheral edge of the material 30 with adhesive 71, reinforcing fiber 80 such as middle glass fiber is coated on the coated surface of the adhesive 71, then a core mold 50 is clamped to the mold 40, rigid urethane resin solution mixed with the glass fiber is injected to be filled in the cavity at a high pressure via the injection head 61 of a high- pressure injection unit 60, and foamed to be reacted. Thus, the mixing ratio of the reinforcing fiber such as the glass fiber is enhanced as compared with the general part of the rigid urethane core material, thereby partly reinforcing it simply.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automobile interior part such as an automobile door trim and a method for manufacturing the same, and more particularly to an automobile in which the rigidity of the outer peripheral portion of the product is strengthened at low cost without impairing the weight reduction. The present invention relates to interior parts for automobiles and a manufacturing method thereof.

[0002]

2. Description of the Related Art For example, various interior parts are mounted in a vehicle interior.
Laminated structure in which a surface material having a cushioning property and a decorative property is laminated on the surface side of a core material formed by molding a fiberboard, a resin board, or the like having a shape-retaining property and a mounting rigidity to a vehicle body panel into a required shape. Those of the body are generally known.

A drawback of the core material made of fiberboard, resin board or the like is that it is heavy and not suitable for reducing the weight of the product, and the moldability is not satisfactory, and it is complicated. There was a problem that it could not be applied to products with various curved shapes.

As a countermeasure against this, it has been proposed and implemented that a hard urethane core reinforced with a glass mat or the like is used to accelerate the weight reduction and enhance the formability.

8 and 9 are a front view and a sectional view showing the structure of an automobile door trim using a hard urethane core material. The automobile door trim 1 has a hard urethane resin liquid mixed with milled glass fiber in a mold. It is roughly composed of a hard urethane core material 2 which is injected and molded into a required shape, and a skin material 3 which is integrally attached to the surface side thereof so as to obtain decorativeness and a good surface feel. .

The hard urethane core 2 is made of milled glass fibers which are evenly dispersed in the hard urethane core 2.
Is reinforced throughout its rigidity,
As shown in FIG. 2, the outer peripheral flange portion 1a along the both side edges and the lower edge of the door trim 1 are set to be thin such that the thickness of the hard urethane core material 2a is 2.5 to 3.0 mm, so that they are easily broken. Has become.

FIG. 11 shows the door trim 1 as viewed from the back side. Although a plurality of reinforcing ribs 4 are set along the inner edge of the outer peripheral flange portion 1a, the outer peripheral edge portion has a reinforcing function. Since it is difficult to set the reinforcing ribs 4 on the flange portion 1a, it is not an effective reinforcing structure.

As an example of countermeasures, it is possible to insert a reinforcing plate such as an iron plate into the thin core material portion 2a corresponding to the outer peripheral flange portion 1a. However, in such a case, cost and weight are increased, which is effective. It cannot be a countermeasure.

The manufacturing method of the above-mentioned automobile door rim 1 is as follows.
As shown in FIG. 12, a preformed skin material 3 is set on the mold surface of the cavity mold 5, and the core mold 6 is clamped with respect to the cavity mold 5 so that the space between the molds 5 and 6 is reduced. The injection head 7 of the high-pressure injection machine 7 is formed in the formed cavity.
A hard urethane resin liquid mixed with milled glass fibers is injected and filled at a predetermined pressure through a, thereby molding the hard urethane core material 2 into a required shape and integrating the skin material 3 on the surface side thereof.

At this time, the reinforcing rib 4 is provided on the hard urethane core material 2.
In order to form the above, it is necessary to form groove portions corresponding to the thickness of the reinforcing rib 4 in the core mold 6 at a plurality of positions.

[0011]

As described above, in the conventional hard urethane core material 2, milled glass fibers are mixed in a predetermined ratio, usually about 15 parts by weight with respect to the total weight, to reduce the weight and the rigidity. However, in particular, the outer peripheral flange portion 1 along both side edges and the lower edge of the door trim 1 is provided.
In the case of "a", the wall thickness was inevitably reduced, the rigidity was weak, and it was easily damaged by a small impact, and a strength measure was required.

Further, there is a problem in that it is difficult to form the reinforcing ribs 4 and to insert a metal plate or the like in terms of molding, and it is difficult to put them into practical use in terms of cost.

The present invention has been made in view of such circumstances, and by using a hard urethane core material filled with milled glass fiber, it is possible to reduce the weight and maintain an appropriate rigidity for an automobile. It is an object of the present invention to provide an interior part for a vehicle and a method for manufacturing the same, in which the rigidity of the outer peripheral flange portion is enhanced easily and inexpensively.

[0014]

In order to achieve the above object, the present invention provides a hard urethane core material filled with milled glass fiber and molded into a required shape by reaction injection molding, and molded into a product shape. In the interior part for an automobile, which is composed of a skin material that is integrally coated on the surface of the hard urethane core material, the thin wall portion along the outer peripheral flange portion of the hard urethane core material has a mixing ratio of reinforcing fibers of a general portion. It is characterized by being set higher than.

Further, in the method for manufacturing an automobile interior part according to the present invention, the surface material of the cavity material, which has been previously formed into a required shape, is set on the mold surface of the cavity mold with the surface side facing downward, and Along the inner surface of the outer peripheral edge of the, after applying the adhesive, after ejecting reinforcing fibers such as milled glass fibers to the adhesive application surface, the core mold is clamped to the cavity mold,
A hard urethane resin liquid mixed with milled glass fiber is injected and injected into the cavity of a predetermined space between the cavity type and the core type through the injection head of a high-pressure injection machine, and mixed into the outer peripheral thin-walled part compared to the general part. It is characterized in that a hard urethane core material having an increased filling ratio of the reinforcing fibers is formed into a required shape, and a skin material is integrated on the surface side of the hard urethane core material.

[0016]

As apparent from the above construction, the hard urethane core material entirely reinforced with the milled glass fiber has the thin portion at the portion corresponding to the outer peripheral flange portion of the product. Since the mixing ratio of the reinforcing fibers in the thin portion is set higher than that in the general portion, a strong rigidity can be obtained without setting the reinforcing rib while maintaining a predetermined thickness.

Further, as a method of increasing the mixing ratio of the reinforcing fibers, an adhesive is applied along the inner surface of the outer peripheral edge of the skin material set in the mold, and a predetermined amount of the reinforcing fibers is applied to the adhesive application surface, Since the hard urethane resin liquid is injected and filled for foaming, the number of grooves for forming the reinforcing ribs in the mold is small, and the groove depth is small.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The interior parts for an automobile and the method for producing the same according to the present invention will be described below in detail by exemplifying an automobile door trim.

FIG. 1 is a front view showing an automobile door trim to which the present invention is applied, FIG. 2 is a sectional view showing the structure of a peripheral flange portion of the automobile door trim, and FIGS. 3 to 6 show each step of the method of the present invention. FIG. 7 is a sectional view showing a rear pillar trim to which the present invention is applied.

1 and 2, an automobile door trim 10 is a hard urethane core material 20 filled with milled glass fiber and a surface material 30 which is integrated on the surface side thereof and is excellent in cushioning property and surface feel. It is composed of and.

More specifically, the skin material 30 used in this embodiment is a laminated sheet having a PVC sheet 31 and a vinyl chloride foam 32 laminated on the back surface thereof, which is softened by heating and then vacuum-formed into a desired shape. However, you may use the skin material 30 shape | molded by PVC slush molding to the required shape by powder slush molding.

On the other hand, the hard urethane core material 20 contains 10 to 3 parts based on 100 parts by weight of the polyol on the polyol component side.
Milled glass fiber (0.2 mm-
Fiber length of 1.5 mm, preferably 0.4 mm to 1.0
mm) is mixed and high-pressure injection molding is performed to form the curved surface shape shown in the figure, and the plate thickness of the hard urethane core material 20 is set to about 3 mm in the general portion, and the reinforcing effect of the milled glass fiber is obtained. Keeps good rigidity.

By the way, according to the present invention, the thin portion 21 of the hard urethane core material 20 corresponding to the outer peripheral flange portions 11 along both side edges and the lower edge of the automobile door trim 10 is as follows.
The mixing ratio of the reinforcing fiber such as milled glass fiber is set to be higher than that of the general portion. In this embodiment, the mixing ratio is set to 15% higher than that of the general portion.

Therefore, the hard urethane core material 2 at a portion corresponding to the outer peripheral flange portion 11 of the automobile door trim 10
The thickness of the thin portion 21 is restricted to 2.5 to 3.0 mm, but as described above, since the mixing ratio of the reinforcing fiber such as milled glass fiber is high, the outer peripheral flange portion 11 has It has sufficient rigidity without being damaged.

Further, depending on the specifications, the hard urethane core material 20
In the above, the reinforcing ribs 22 may be formed inside the thin portion 21, but even in this case, it is not necessary to set the rib height of the reinforcing ribs to be high and to be large as in the conventional case.
Since the number of set 2 is small and the rib height can be made low, the number of man-hours for grooving the molding die can be greatly reduced.

As described above, the door trim 10 for an automobile according to the present invention uses the hard urethane core material 20 filled with milled glass fiber to reduce the weight, and in particular, is thin due to the mating parts. In the outer peripheral flange portion 11 which is required to be made higher, the mixing ratio of the reinforcing fibers such as milled glass fiber is set to be higher than that of the general portion of the hard urethane core material 20, so that the outer peripheral flange portion 11 which is conventionally poor in rigidity. In the following, a case where the present invention is applied to the method for manufacturing the automobile door trim 10 having the above-described structure will be described.

As shown in FIG. 3, an automobile door trim 1
As a molding device for molding 0, a cavity mold 40 having a desired mold surface, a core mold 50 having almost the same mold surface shape, and a core mold 50 are installed, and a hard urethane resin liquid is injected. The high-pressure injector 60 is generally included.

Further, the cavity mold 40 has a skin material 3
In order to hold 0 at an appropriate position, a vacuum suction hole 41 is opened at a predetermined position, the vacuum suction hole 41 is connected to a vacuum suction pump 43 through a pipe 42, and the pipe 42 has an opening / closing valve 44. Is equipped with.

First, the skin material 30 formed in advance into a desired curved shape by vacuum forming or the like is set on the die surface of the cavity die 40 with the surface side facing downward.
At that time, the vacuum pump 43 is activated and the cavity mold 40
Due to the vacuum suction force acting on the mold surface, the skin material 30 is held in close contact with the mold surface of the cavity mold 40.

After that, the adhesive 71 is applied by the spray gun 70 along the inner surface of the skin material 30 corresponding to the outer peripheral flange portion 11 of the vehicle door trim 10.

As this adhesive, any reinforcing fiber such as milled glass fiber discharged in a later step can be fixed. A urethane type one-pack type adhesive is used in this embodiment, but a hard urethane resin liquid is used. The material of the adhesive is not particularly limited as long as it does not hinder the foaming reaction.

After that, as shown in FIG. 4, the reinforcing fiber 80 such as milled glass fiber is adhesive 71 by the spouting device 81.
It is sprayed on the coated surface, and as shown in FIG. 5, the reinforcing fiber 80 is attached to a portion corresponding to the outer peripheral flange portion 11 of the automobile door trim 10.

The fiber length of the reinforcing fiber 80 is 0.4 mm.
The length is preferably set to 1.0 mm, but the fiber length or the material of the fiber is not particularly limited.

Thereafter, as shown in FIG. 6, the core die 50 is lowered by an elevator mechanism (not shown) to form a cavity having a predetermined clearance between the cavity die 40 and the core die 50, and then the high pressure injection machine is used. Through a pouring head 61 of 60, a hard urethane resin liquid (milled glass fibers are mixed at a predetermined ratio) is injected and filled at a high pressure of 150 kg / cm ² .

Then, the foaming reaction of the hard urethane resin liquid is completed to mold the hard urethane core material 20 having a thickness of 3 mm in a general portion into a required shape, and the skin material 30 is provided on the surface side of the hard urethane core material 20. When integrated, the molding of the automobile door trim 10 shown in FIG. 1 is completed.

Although not shown, in order to integrally form the reinforcing rib 22 on the hard urethane core material 20, a plate-shaped groove corresponding to the thickness of the reinforcing rib 22 may be formed in the core die 50.

As the spouting device 81 for the reinforcing fiber 80, a conventional means such as mixing the reinforcing fiber into the blower may be used.

As described above, according to the method of the present invention, the adhesive is applied to the inner surface of the skin material 30 corresponding to the outer peripheral flange portion 11 at a portion such as the outer peripheral flange portion 11 of the vehicle door trim 10 which is inevitably thinned. By applying 71 and discharging reinforcing fibers such as milled glass fibers on the adhesive 71 application surface, the rigidity of the outer peripheral flange portion 11 can be easily enhanced, and there is an advantage that it is excellent in practicality.

Further, the rigidity of the thin portion 21 of the hard urethane core material 20 corresponding to the outer peripheral flange portion 11 is greatly enhanced, so that the set number of reinforcing ribs 22 and the height of the ribs can be reduced, so that the reinforcing ribs 22 and the vehicle body panel can be reduced. There is also an advantage that the degree of consideration of interference and the like generated between them is reduced, and the freedom of molding the door trim is improved.

Further, FIG. 7 shows an embodiment in which the interior parts according to the present invention are applied to the rear pillar trim 90. Although the outer peripheral flange portion 91 and the opening edge portion 92 of the rear pillar trim 90 are required to have a thin structure. Also in the case of this embodiment, the mixing ratio of the reinforcing fibers is set higher in the outer peripheral flange portion 91 and the opening peripheral edge portion 92 than in the general portion, and the outer peripheral edge portion and the opening edge portion are damaged or deformed. Can be reliably prevented.

As described above, the automobile interior parts according to the present invention include the automobile door trim 10 and the rear pillar trim 90.
The use is not particularly limited as long as a hard urethane core material mixed with milled glass fiber is used.

[0042]

As described above, the present invention has the special operational effects described below.

(1) An automobile interior part according to the present invention comprises:
As a hard urethane core material in the outer peripheral flange, a thin-walled structure is used in which the mixing ratio of reinforcing fibers is set higher than that of the general section.
There is no problem such as warp deformation, the strength of the outer peripheral flange portion can be enhanced, and the warp deformation can be prevented in advance.

(2) The interior parts for automobiles according to the present invention are:
As a hard urethane core material in the outer peripheral flange, a thin wall structure is used in which the mixing ratio of reinforcing fibers is set higher than that of the general part, so many reinforcing ribs are installed integrally with the hard urethane core material, There is an effect that cost reduction and weight saving can be promoted by saving the urethane material, instead of the structure in which the flange portion is set to be thick.

(3) The interior parts for automobiles according to the present invention are:
Along with the outer peripheral flange portion, without increasing the thickness of the hard urethane core material, simply by increasing the mixing ratio of the reinforcing fibers,
Since the desired rigidity can be maintained, the set number of reinforcing ribs can be reduced compared to the conventionally required reinforcing ribs, and the height of the reinforcing ribs can be kept low. The degree can be significantly reduced,
This has the effect of increasing the freedom of modeling.

(4) In the method for manufacturing an automobile interior part according to the present invention, an adhesive is applied along the inner surface of the outer peripheral flange portion of the skin material set in the cavity type, and the reinforcing fiber is further applied to the adhesive applied surface. After that, high-pressure injection reaction molding is performed, and the partial reinforcement of the hard urethane core material can be performed easily and inexpensively, and it has the effect of being excellent in practicality.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of an automobile door trim to which the present invention is applied.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a sectional view showing an adhesive applying step in the method of the present invention.

FIG. 4 is a cross-sectional view showing a step of discharging reinforcing fibers in the method of the present invention.

FIG. 5 is an explanatory view showing a discharge area of reinforcing fibers.

FIG. 6 is a sectional view showing a high-pressure injection reaction molding step in the method of the present invention.

FIG. 7 is an external view showing a rear pillar trim to which the present invention has been applied.

FIG. 8 is a front view showing a conventional automobile door trim.

9 is a sectional view taken along line IX-IX in FIG.

10 is a sectional view taken along line XX in FIG.

FIG. 11 is a rear view of a conventional automobile door trim.

FIG. 12 is a cross-sectional view showing a conventional reaction injection molding process of an automobile door trim.

[Explanation of symbols]

 10 Automotive Door Trim 11 Peripheral Flange 20 Hard Urethane Core 21 Thin Wall 22 Reinforcing Ribs 30 Skin 40 Cavity 41 Vacuum suction hole 50 Core 60 High Pressure Injector 61 Injection Head 70 Spray Gun 71 Adhesive 80 Reinforcing Fiber 81 Discharging device 90 Rear pillar trim

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location B60N 3/04 C B60R 13/02 B // B29K 75:00 105: 04 105: 08 105: 20 309: 08 B29L 31:58

Claims (2)

[Claims] 1. A hard urethane core material (20) filled with milled glass fiber and molded into a required shape by reaction injection molding, and molded into a product shape, and coating the surface of the hard urethane core material (20). In an interior part for an automobile composed of an integrated skin material (30), the thin wall portion (21) along the outer peripheral flange portion (11) of the hard urethane core material (20) has a mixing ratio of reinforcing fibers. Interior parts for automobiles characterized by being set higher than those of the general department. 2. The outer surface of the outer peripheral edge of the skin material (30) is set on the mold surface of the cavity mold (40) with the surface side of the skin material (30) preliminarily formed in a desired shape being set downward. After applying the adhesive (71), the reinforcing fiber (80) such as milled glass fiber is discharged onto the adhesive (71) application surface, and then the core mold (50) is changed to the cavity mold (40).
Then, the mold was clamped to mix the milled glass fiber into the cavity of the predetermined space between the cavity mold (40) and the core mold (50) through the injection head (61) of the high-pressure injection machine (60). A hard urethane resin liquid is injected and filled to form a hard urethane core material (20) having a higher filling ratio of reinforcing fibers mixed in the thin portion (21) than a general portion into a required shape, and the hard urethane core is also formed. Material (20)
A method for manufacturing an automobile interior part, characterized in that a skin material (30) is integrated on the surface side of the.