JP4482326B2 - Interior parts for vehicles - Google Patents

Description

  The present invention relates to an interior part for a vehicle in which a decorative member is integrally formed, and particularly relates to an interior part for a vehicle in which a decorative member having a raising property is integrally formed.

  2. Description of the Related Art Conventionally, a technique for integrally molding a decorative member made of another member on a part of a molded resin is known. For example, as an example of a molded resin using a decorative member, there are known interior lining parts for automobiles such as door lining and side lining, and those using a partially decorated member for a molded resin.

  These decorating members are integrally molded with the molding resin and the decorating member by injecting molten resin after being mounted in a molding die in advance. Specifically, as shown in FIGS. 3 to 5, the decorative member 120 such as cloth is preformed, positioned and set with respect to the fixed mold 102 side, and the movable mold 101 is moved to the fixed mold 102 side. The resin J is injected into the cavity K formed by the movable mold 101 and the fixed mold 102 to form a molded product.

  In the above conventional molding method, the edge processing of the decorative member 120 is performed along the grained bar 103 provided on the movable mold 101 side, so that after the decorative member 120 is mounted, the surface of the product A groove 130 is formed in the material 110 (see FIG. 6). Therefore, as shown to Fig.7 (a), when the terminal part 121 of the decorating member 120 was short, base resin had been seen in the groove part 130. FIG. Or as shown in FIG.7 (b), when the terminal part 121 of the decorating member 120 was long, the return of the terminal part 121 was seen, and there existed a problem that the appearance fell.

For this reason, it is necessary to cut the decorating member 120 with high accuracy, which is troublesome. Moreover, even if the decorative member 120 is cut with high accuracy, there is a problem in that the same problem as described above occurs if the decorative member 120 is not arranged with high accuracy.
In order to avoid this, when trying to improve the merchantability by narrowing the groove portion 130, it is necessary to make the wood grain bar 103 itself of the mold thinner. However, if the wood grain bar 103 is made thinner in this way, the wood grain bar 103 will break. There was a risk of damage.

In order to solve the above inconvenience, the following technique has been proposed (see, for example, Patent Document 1).
Japanese Patent Laying-Open No. 2003-154543 (page 5-6, FIG. 4)

In the technique of the above-mentioned Patent Document 1, as shown in FIGS. 8 to 10, a slide block 104 having a groove 104 a is provided in the fixed mold 102, and the terminal portion 121 of the decorative member 120 is held by the groove 104 a. Resin molding.
In this technique, first, the movable mold 101 provided with the edge 105 protruding from the surface of the mold is brought into contact with the decorating member 120 in a state where the terminal portion 121 is inserted into the groove 104a (FIG. 8A). (FIG. 8B).
At this time, the terminal portion 121 is located between the edge 105 and the shoulder portion 104b of the groove 104a. Then, from this state, the slide block 104 is slightly slid toward the movable mold 101, and the terminal portion 121 is sandwiched between the shoulder portion 104b and the edge 105 of the slide block 104 (FIG. 8C).

Then, molding the resin J injected in the surface material in the cavity K ₁ formed between the stationary die 102 and the slide block 104 and the movable mold 101 (FIG. 9 (a)). Thereafter, the slide block is retracted, and the cavity K ₂ , the movable mold 101 (the back side of the decorating member 120), the fixed mold 102, and the movable mold 101 (the back side of the surface material) and the slide block 104 and the fixed mold 102 are Cavities K ₃ between the slide blocks 104 are respectively formed (FIG. 9B), resin J is injected into the cavities K ₂ and K ₃ (FIG. 10A), and the molded product is formed by releasing the mold. It is formed (FIG. 10B). The resin J flows through the cavity _{K 3} to cavity _{K 2.}

Thus, in the technique shown in Patent Document 1, since no groove is formed at the boundary between the decorative member 120 of the molded product and the general surface, the base resin can be seen and the terminal portion 121 can be seen folded. It is possible to avoid the poor appearance due to the end.
However, when the decorative member 120 integrally molded with the molded product has a raising property, when the molding is performed by the molding method without the groove, hair cracking occurs at the boundary between the decorative member 120 and the molded product. There was a problem.
Hereinafter, the reason why the hair breakage occurs in the decorative member having the raising property will be described.
In the method of sticking the decorative member at the time of molding, wrinkles (flow wrinkles) due to the flow of the resin and the fall of the gate part (gate damage) due to the heat of the resin occur on the decorative member. Generally, a foam layer 124 made of urethane foam or the like is formed on the back surface.

FIG. 11 is an explanatory view showing a conventional decorative member 120. Conventionally, in order to effectively avoid fluid wrinkles and gate damage, the thickness x ′ of the foam layer 124 is about 2.0 to 3.0 mm, and the density ρ of the foam layer 124 is 0.03 g / cm ^3. It was set to a degree.
However, when the decorative molding as shown in FIGS. 8 to 10 is performed using the decorative member 120, the foam layer 124 is crushed by embedding the vicinity of the terminal portion of the decorative member 120 by the molding. As a result, a change occurs in the hair flow of the raised portions 126 of the crushed portion, and there is a disadvantage in that hair breakage occurs.
For this reason, as shown in FIG. 12, although the method of using the decorating member 140 which is comprised from the foam layer 141 and the skin layer 142 and does not have a raising part in the skin layer 142 is considered, it is set as the appearance with a high-class feeling. For this purpose, it is preferable to use a decorative member having a raised portion.

Here, the hair cracks generated in the decorative member will be described more specifically. For example, as shown in FIG. 13, when the raising direction of the decorative member 120 is from the front to the rear of the vehicle body, Even if the terminal part of the decoration member 120 is pinched | interposed into resin at the time of shaping | molding and the part which is crushed locally generate | occur | produces, the raising | fluff of the decoration member 120 flows toward the boundary part 123. As a result, no cracks occur and a good appearance is maintained.
However, as indicated by reference symbols D, E, and F, the portion where the direction of the boundary portion 123 does not follow the raised direction is crushed when the foam layer 124 of the decorative member 120 is crushed between the resin during molding. In the part which is not done, the hair flow remains as it is, but in the crushed part, the raised part 126 changes to stand up, and the raised part is broken.
Moreover, as shown in FIG. 14, when the raising direction of the decoration member 120 is downward from the upper side of the vehicle body, the portions indicated by symbols G, H, and I in the figure are the terminals of the decoration member 120 during molding. Even if the portion is sandwiched between the resins and locally crushed, the raised hair of the decorating member 120 flows toward the boundary portion 123, so that no cracks occur and a good appearance is maintained.
However, as indicated by reference characters J and K, the appearance defect due to hair cracking occurs in the portion where the boundary portion 123 does not follow the raised direction.
Conventionally, in order to avoid appearance defects due to hair cracking, when there is a boundary portion 123 that is not along the raised direction, only the boundary portion 123 has been formed as shown in FIGS.
Alternatively, the hair cracking is corrected by brushing manually after molding, which has been a cause of a decrease in manufacturing efficiency and an increase in cost.

Therefore, even if the foam layer of the decorative member is deformed at the time of molding, the present inventor conducted various experiments with the object of minimizing the influence on the raised portion, and as a result, setting the thickness and density of the foam layer. As a result, it was discovered that deformation of the foam layer during molding can be minimized, and the present invention has been achieved.
An object of the present invention is to provide a vehicular interior part in which a raised decorative member is integrally formed, and the vehicular interior part has high appearance merchandise without causing cracks in the raised part. It is in.

According to the vehicle interior part according to claim 1, the subject is a vehicle interior part in which a decorative member is integrally formed on a surface material made of a base resin, and the decorative member is foamed and a layer and a skin layer and a hair raising portion, in the vehicle interior component consisting comprises a portion where the boundary portion between the decorative member and the surface material does not meet brushed direction of the decorative member, wherein the hair raising portion is flocked by electrostatic flocking process in the skin layer to which the adhesive is applied, the decorative said surface member side which is formed in the foam layer of the member is at 1.5mm or less in thickness and density of 0 was .06g / cm ³ or more, it is solved by.
In this way, by reducing the foam layer and increasing the density of the foam layer, deformation of the foam layer in the decorative member at the time of molding is minimized, and generation of hair cracks due to deformation of the foam layer is prevented. It becomes possible to prevent.
In addition, when the said foaming layer is formed from a urethane foam more specifically, it is excellent in heat resistance, cost, and durability, and is suitable.

In vehicle interior parts that integrally mold a decorative member having brushed surfaces, the foam layer of the decorative member is thin, and the density of the foam layer is increased, thereby suppressing the shape change of the decorative member during molding. Is possible.
Therefore, when the decorative member is integrally molded with the base resin, the deformation of the foam layer is suppressed, and the raised surface of the surface is not affected. It becomes possible.
In this way, since the surface raising is less likely to cause hair cracking, even if the boundary between the decorative member and the surface material is not along the raising direction, the decoration member and the base material according to the raising direction Since it is not necessary to change the boundary setting or to perform brushing after molding, manufacturing efficiency can be improved.
In addition, the foam layer of the decorative member is formed thin, but the density is set high, moderate strength is maintained, and it is difficult to transfer heat, so it is possible to prevent fluid wrinkles and gate damage. is there.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. It should be noted that members, arrangements, and the like described below do not limit the present invention, and it goes without saying that various modifications can be made in accordance with the spirit of the present invention.
FIG. 1 is a perspective view showing an example of a vehicle interior part according to the present embodiment, and FIG. 2 is a cross-sectional view of a decorative member according to the present embodiment.

As shown in FIG. 1, for example, a door lining is used as the vehicle interior part S, and generally, a decorative member 20 is integrally formed on a surface material 10 made of a base resin.
The decorating member 20 includes a decorating surface 22 that is exposed in the vehicle interior. The decorating member 20 is embedded in the surface material 10 at the boundary 23 and is integrally formed with the surface material 10.
As shown in FIG. 2, the decorative member 20 of this example includes a foam layer 24, a skin layer 25, and a raised portion 26.
The foam layer 24 is made of polyurethane foam. The decorative member 20 of this example is formed so that the density ρ (g / cm ³ ) of the foamed layer 24 is 0.06 g / cm ³ or more.
Moreover, the decorative member 20 of this example is formed so that the thickness x of the foam layer is 1.5 mm or less.
The skin layer 25 is made of polyvinyl chloride resin, olefin-based non-foamed resin or foamed resin, or a combination thereof.
The raised portion 26 is made of polyamide fiber such as rayon, nylon 6, nylon 66 (nylon is a trade name), polyester fiber, or acrylic fiber, and is applied to the skin layer 25 coated with an adhesive by so-called electrostatic flocking treatment. It is flocked.

When forming the vehicle interior part S such as a door lining, when the molding member 20 having the above configuration is formed, the foamed layer 24 is thinner and denser than the conventional one. Deformation when integrally molded with the base resin can be prevented.
In particular, when the surface of the skin layer 25 is provided with a raised portion 26, the foamed layer 24 is deformed to cause hair cracking, which is inconvenient in appearance merchandise, but the foamed layer 24 is thinner than the conventional one, By increasing the density and making it harder, deformation of the foam layer 24 can be suppressed, so even if there is a portion where the boundary between the decorative member and the surface material is not along the raised direction, the base resin and Generation | occurrence | production of the hair crack in the boundary part 23 vicinity of the decorating member 20 is prevented.

When the vehicle interior part S such as a door lining is molded using the decorative member 20 having the above-described configuration, it may be formed by, for example, a molding method shown in FIGS.
In molding the vehicle interior part S, as shown in FIGS. 9A and 10A, the resin J constituting the surface material 10 is injected into the cavity. Since the foam layer 24 is thin and formed with an appropriate hardness, even when the decorative member 20 is integrally molded, the foam layer 24 is not locally crushed.
For this reason, generation | occurrence | production of a hair crack is prevented without affecting the raising part 26 provided in the surface of the decorating member 20, and it becomes possible to obtain the vehicle interior component S of favorable external appearance.

It is a perspective view which shows an example of the interior component for vehicles of this invention. It is sectional drawing of the decorating member which concerns on this invention. It is explanatory drawing of the conventional method. It is explanatory drawing of the conventional method. It is explanatory drawing of the conventional method. It is explanatory drawing which shows the conventional vehicle interior component. It is explanatory drawing which shows the conventional interior component for vehicles. It is explanatory drawing of the conventional method. It is explanatory drawing of the conventional method. It is explanatory drawing of the conventional method. It is sectional drawing which shows the conventional decorating member. It is sectional drawing which shows the conventional decorating member. It is explanatory drawing which shows the hair crack generation | occurrence | production site | part in a vehicle interior component. It is explanatory drawing which shows the hair crack generation | occurrence | production site | part in a vehicle interior component.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Surface material, 20 Decorating member, 22 Decorating surface, 23 Boundary part, 24 Foam layer, 25 Skin layer, 26 Brushed part, 101 Movable type, 102 Fixed type, 102a Groove, 103 Grain bar, 104 Slide block, 104a grooves, 104b shoulder, 105 edges, 110 surface material, 120 decorative member, 121 the terminal portion, 130 groove, J _{resins, K, K 1, K 2} , K 3 cavity, interior parts for S vehicles, x, x' thickness

Claims (2)

An interior part for a vehicle in which a decorative member is integrally formed on a surface material made of a base resin, the decorative member having a foam layer, a skin layer, and a raised portion, and the decorative member In an interior part for a vehicle having a portion where a boundary portion with the surface material is not along a raising direction of the decorative member , the raising portion is formed by electrostatic flocking treatment on the skin layer to which an adhesive is applied. flocked, the decorative said surface member side which is formed in the foam layer of the member has a thickness of at 1.5mm or less, for a vehicle interior component and density characterized in that the 0.06 g / cm ³ or more . The interior part for a vehicle according to claim 1, wherein the foam layer is made of polyurethane foam.

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