JP2003200447A - Method for integrally molding decorative member of lining member for vehicle and molded article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for integrally molding the decorative member of a lining member for a vehicle, capable of manufacturing a molded article having excellent appearance and sufficiently held in the joining strength of the decorative member and a substrate material. <P>SOLUTION: The decorative member 20 and a substrate material resin are integrally molded by arranging the decorative member 20 of the lining member for the vehicle in a mold and injecting the substrate material resin in the cavity of the mold. This molding method includes a process for fixing the decorative member 20, which is obtained by forming notches 22 with a width (a) of 50 mm or less to the part positioned in a cavity at an interval (b) of 300 mm or less, along the mold, a process for injecting the substrate material resin in the cavity and a process for fusing the substrate material resin injected inside the decorative member 20 and the substrate material resin injected outside the decorative member 20 so as to transmit through the notches 22 to integrally mold the decorative member 20 and the substrate material resin. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for integrally molding a decorative member for a vehicle lining member and a molded product produced by the method, and more particularly, to a bonding strength between the decorative member and a base material. The present invention relates to a molding method that is sufficiently retained and can improve the appearance.

[0002]

2. Description of the Related Art Conventionally, in a vehicle lining member such as a door lining or a side lining that has been used as an interior lining material for automobiles or the like, a skin material is partially integrally formed at the same time as the base material molding, and a decorative portion is provided The technology is known.

As a method of forming a molded article having a decorative portion, for example, a protruding piece is provided on a part of a decorative member, and the protruding piece is fixed by a clamp device provided in a mold to decorate. There has been a method in which a member is closely attached to a mold and fixed, and after the decorative member is fixed, a base resin is filled in the cavity to obtain a molded product.

However, in the above method, since the protruding piece clamped by the clamp device is drawn into one of the molds across the cavity of the mold, the flow of the base resin is interrupted when the number of this part increases. The continuity of the base resin may not be maintained.

For this reason, in the past, the projection piece was made to be about 20% or less of the entire peripheral length of the peripheral edge portion of the skin material to ensure the maximum continuity of the base resin. However, if the number of the protruding pieces for holding is reduced as described above, the position accuracy of the end portion of the decorative member is deteriorated, the decorative member is not properly attached to a predetermined position, or the decorative member is on the surface side There was a case that it protruded from the base material.

[0006]

In order to solve the above problems, a decorative member is previously formed into a shape along the surface of a mold, and this decorative member is set in the mold to simultaneously form a base material. There is a method of pasting. According to this method, the decorating member is accurately arranged in the mold and follows the mold surface well during molding, so that it is not necessary to hold the decorating member by using a clamp device or the like.

For this reason, it is possible to maintain the continuity of the base resin without dividing the resin at the end of the held decorative member. However, this method has a problem in that the cost is increased because the decorative member is preformed.

An object of the present invention is to provide a molded article having a high appearance and having a sufficient bonding strength between the decorative member and the base material.
An object of the present invention is to provide a method for integrally molding a decorative member for a vehicle lining member that can be manufactured at low cost.

Another object of the present invention is to prevent wrinkles from being generated in the decorating member even in the case of partial decorating of a complicated three-dimensional shape, and to provide the decorating member bonding portion and the non-bonding portion. The object of the present invention is to provide a molded product in which the outer appearance of the boundary part of (1) is good and the bonding strength is sufficiently secured.

[0010]

According to the method of integrally molding a decorative member for a vehicle lining member according to the present invention, the decorative member for a vehicle lining member is arranged in a mold, In the method of injecting a base resin into the cavity of the mold to integrally mold the decorating member and the base resin,
Fixing a decorating member having a notch having a width of 50 mm or less in a range positioned at a distance of 300 mm or less in a portion located in the cavity along a mold, injecting a base resin into the cavity, And a step of integrally molding the decorating member and the base resin by allowing the base resin injected inside the decorating member and the base resin injected outside to be fused through the cutouts. It is solved by

Further, the above-mentioned problem is that the decoration member of the vehicle lining member is arranged in a mold, and a base resin is injected into a cavity of the mold so that the decoration member and the base resin are integrated. In the molding method, a step of fixing a decorating member having holes with a diameter of 20 mm or less in a range of a distance of 300 mm or less in a portion located in the cavity along a mold, and injecting a base resin into the cavity. A step, and a step of integrally molding the decorative member and the base resin by allowing the base resin injected inside the decorative member and the base resin injected outside to be fused through the holes. ,, is solved by.

According to the present invention, the base resin injected inside and outside the decorative member is fused through the cutouts or holes formed in the base resin, and the cutouts or holes are not formed. It is possible to obtain a sufficient bonding strength between the decorative member and the base resin, since it is integrally molded including.

At this time, the present invention is suitable for stably holding the decorating member with tension at the peripheral portion of the decorating member and at the same time securing the bonding strength between the decorating member and the base resin. Since the notches or holes are formed in the size and the interval, even in the case of partial decoration of a complicated three-dimensional shape, it is possible to prevent wrinkles on the surface of the decoration member and the protrusion from the base material, which is excellent. It is possible to obtain a molded product having an appearance and rigidity.

The molded product formed by the above molding method is
In a molded product in which a decorating member and a base resin are integrally molded, a notch having a width of 50 mm or less is formed in a portion of the peripheral edge of the decorating member that is in contact with the base resin so as to have an interval of 300 mm or less. .

Alternatively, the molded product formed by the above-mentioned molding method is a molded product in which a decorating member and a base resin are integrally molded, and a portion of the peripheral portion of the decorating member which is in contact with the base resin is formed. It is characterized in that the holes having a diameter of 20 mm or less are formed so as to have an interval of 300 mm or less.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. The members, arrangements, and the like described below do not limit the present invention and can be variously modified within the scope of the gist of the present invention.

1 to 4 show an embodiment of the present invention, FIG. 1 is an explanatory view showing an example of a molded product, FIG. 2 is an explanatory view showing a decorative member, and FIG. 3 is a molding state. FIG. 4 is a sectional view for explaining, and FIG. 4 is a sectional view for explaining a molding state of a portion provided with a notch.

According to the present invention, a part of the base material 10 is used as the decorating member 2.
And a molded article 1 obtained by this method. The molded product 1 is a vehicle lining member, and in this example, description will be given based on a door lining as shown in FIG.

This kind of door lining is provided with a portion where the decoration member 20 is arranged inside the vehicle. Examples of the material of the decorative member 20 include thermoplastic resin such as woven cloth, non-woven cloth, polyolefin, vinyl chloride and nylon, and thermoplastic elastomer sheet and film such as polyolefin series, polyester series, urethane series and vinyl chloride series. . It is also possible to use a laminate of two or more of the above materials.

Further, in order to give a soft feeling, a foamed sheet of polypropylene, polyethylene, urethane or the like is attached to the back surface of the decorative member 20, or it is protected from heat of the molten resin at the time of molding, For the purpose of strengthening the adhesive force with the base resin, it is also possible to use a laminate in which a backing material made of cloth or a resin sheet is attached.

As shown in FIG. 2, a cutout portion 22 is provided on the peripheral portion of the decorative member 20. When molding,
Portions other than the notch 22, that is, the notch 22
The portions located on both sides of the are held by the clamp means as the clamp allowances 21, and the decoration member 20 is fixed. At this time, at least a part of the cutout portion 22 is
It is configured to be located in the cavity 33 of 32.

When the molded product 1 is molded using the decorative member 20 having the above structure, the base resin is injected inside and outside the decorative member 20 in the cavity of the mold.
At this time, the base resin injected inside the decorative member 20 and the base resin injected outside pass through the notches 22 and are fused with each other.

Since the fused base resin is integrally molded including the decorative member 20, it is possible to obtain sufficient bonding strength between the decorative member 20 and the base resin.

The notch 22 of the present example is formed with a size and an interval suitable for stably holding the decorative member with tension and at the same time securing the bonding strength between the decorative member and the base resin. Has been done. Specifically, the width a is 50 mm or less, and the distance b between the adjacent notches 22 is 300 mm or less.

It is more preferable that the width a of the cutout 22 is 30 mm or less. When the width of the cutout portion 22 is 30 mm or less, it is preferable that the wrinkles due to the movement of the decorating member and the shortage of terminals are less likely to occur.

A method of integrally molding the decorative member 20 with the base resin will be described with reference to FIGS. 3 and 4. As shown in FIG. 3, the decorative member 20 is disposed between the mold 31 and the mold 32 that face each other.

The decorative member 20, except for the notch 22, is held by the clamp means 34 as the clamp allowance 21 and is drawn into one of the molds 31 so that it is brought into close contact with the mold 31 while applying tension. Is arranged.

After the decorating member 20 is arranged on the side of the one die 31, the other die 32 is moved to be temporarily tightened. Then, from the gate (not shown) to the cavity 3
The base resin is injected into the inside of 3, and the mold is clamped and pressed. As the base resin, those usually used in compression molding and injection molding can be used, and for example, polypropylene is used.

At this time, the base resin 11 injected from the left side in the figure forms the base of the portion covered by the decorative member 20, and the base resin 12 injected from the right side in the figure The base body of the portion where the decoration member 20 is not arranged is molded.

At this time, the notch 22 is formed in the decorative member 20.
4, the base resin 11 injected from the left side in the drawing and the base resin 11 injected from the right side in the drawing at the portion where the cutout portion 22 is provided, as shown in FIG. The base resin 12 passes through the cutout portion 22 and is fused.

Then, while maintaining the clamped state, the base resins 11, 12 are cooled to cure. At this time, since the base resin 11 and the base resin 12 are fused, the decorating member 20 and the base resins 11 and 12 are molded integrally while ensuring sufficient bonding strength.

After the decorative member 20 and the base resins 11 and 12 are molded, the molds 31 and 32 are opened and the molded product 1 is taken out. Then, the decorative member 20 is subjected to terminal treatment and the like, and the molded product 1 is completed.

FIG. 5 shows another example of the decorative member 20. In the above-described embodiment, the notch 22 is formed in the peripheral portion of the decorative member 20.
However, the present invention is not limited to this, and the holes 23 may be provided in the peripheral portion of the decorative member 20 as illustrated.

The holes 23 are formed to have a size and an interval suitable for stably holding the decorative member and at the same time securing the bonding strength between the decorative member and the base resin. In particular,
Diameter is 20 mm or less, distance c between adjacent holes 23 is 30
It is formed to be 0 mm or less.

[0035]

As described above, according to the method of integrally molding the decorative member of the vehicle lining member according to the present invention, the base resin injected inside and outside the decorative member is the base resin. Since it is fused through the notch or hole formed in and is integrally molded including the part where the notch or hole is not formed, it is possible to obtain sufficient bonding strength between the decorative member and the base resin. Is possible.

The notch or hole is formed in a size suitable for stably holding the decorative member and at the same time allowing the base resin to pass through and fuse. Therefore, it is possible to hold the decorative member with high accuracy and to secure the bonding strength of the base resin in the decorative member.

In this way, it is possible to obtain a molded product having a good appearance at a low cost without preforming the skin material even in the case of partially decorating a complicated three-dimensional shape.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an example of a molded product according to the present invention.

FIG. 2 is an explanatory view showing a decoration member.

FIG. 3 is a cross-sectional view illustrating a molded state.

FIG. 4 is a cross-sectional view of an essential part for explaining a molding state of a portion provided with a cutout portion.

FIG. 5 is an explanatory diagram showing another example of the decorative member.

[Explanation of symbols]

1 molded product 10 Base material 11,12 Base material resin 20 decorative members 21 Clamp fee 22 Notch 23 holes 31,32 mold 33 cavities 34 Clamping means

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) B29L 9:00 B29L 9:00 31:58 31:58 F term (reference) 4F202 AD05 AD06 AD09 AD17 AD20 AH17 CA11 CB01 CB13 CB19 CK06 CK15 CQ05 4F204 AA11 AD05 AD06 AD09 AD17 AD20 AD24 AH26 EB01 EB11 EB21 EF01 EF05 4F206 AD09 AD24 AD25 AG03 AH26 JA07 JB13 JB19 JF05 JF35 JL02 JQ06 JQ81

Claims (4)

[Claims] 1. A method of arranging a decorative member of a vehicle lining member in a mold, injecting a base resin into a cavity of the mold, and integrally molding the decorative member and the base resin. A step of fixing a decorative member having a notch having a width of 50 mm or less in a range of a distance of 300 mm or less in a portion located in the cavity along a mold, and a step of injecting a base resin into the cavity, A step of integrally molding the decorating member and the base resin with the base resin injected into the inside of the decorating member and the base resin injected into the outside of the decorating member through the cutouts to be fused. A method for integrally forming a decorative member for a vehicle lining member, comprising: 2. A method of arranging a decorative member of a vehicle lining member in a mold, injecting a base resin into a cavity of the mold, and integrally molding the decorative member and the base resin. A step of fixing a decorating member having holes with a diameter of 20 mm or less at a distance of 300 mm or less in a portion located in the cavity along a mold and injecting a base resin into the cavity; And a step of integrally molding the decorative member and the base resin by allowing the base resin injected inside the decorative member and the base resin injected outside to be fused through the holes. A method for integrally molding a decorative member for a vehicle lining member, comprising: 3. A molded product in which a decorating member and a base resin are integrally molded, and a width 5 is provided at a portion of the peripheral portion of the decorating member which is in contact with the base resin.
A molded product characterized in that notches of 0 mm or less are formed in a range of an interval of 300 mm or less. 4. A molded product in which a decorating member and a base resin are integrally molded, in which a hole having a diameter of 20 mm or less is provided at a portion of 300 mm or less in a peripheral portion of the decorating member in contact with the base resin. A molded product characterized by being formed in.