JPH0554098U - Vehicle interior parts - Google Patents

Abstract

(57) [Summary] [Purpose] To change the shape of the rib on the base end side to eliminate sudden changes in the cooling and solidification rate of the molding raw material around it and make sink marks inconspicuous. [Structure] A thick portion 9 having a rib width W that gradually increases toward the hard foam base material 3 is provided on the base end side of the rib 5 integrally formed on the back surface of the hard foam base material 3.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to improvement of vehicle interior parts, and particularly to measures against sink marks on the surface.

[0002]

[Prior Art]

 Generally, interior parts for vehicles such as door trims are constructed by integrally molding a rigid foam base material on the back surface of a skin material, and ribs that are in contact with the vehicle body panel are integrally projected on the back surface of the rigid foam base material. There is. These ribs are integrally molded at the same time when molding with the same molding material as the rigid foam substrate.

However, when the ribs are integrally provided on the back surface of the rigid foam substrate, the rib protruding portions become thicker than the other portions by the rib protruding portions, so that the molding raw material is cooled at the rib protruding portions. There was a problem that the solidification speed was slower than other parts, and sink marks were generated on the surface of the interior parts after molding.

Therefore, in order to prevent the occurrence of such sink marks, for example, as disclosed in Japanese Utility Model Laid-Open No. 61-29195, the inside of the base end side of the boss portion, which is a thick wall portion, is stolen. There is known a molded product in which the delay of the cooling solidification rate of the molding raw material due to the difference in thickness is reduced by reducing the wall thickness on the base end side. Then, it is possible to apply this method to the ribs of the interior parts for vehicles.

[0005]

[Problems to be solved by the device]

 However, even if the thickness of the boss portion on the base end side is thinned as in the above-mentioned publication, the thickness of the boss portion and its surroundings still suddenly change. There is a noticeable difference between the two, and the sink marks will inevitably stand out. Therefore, it is difficult to make sink marks inconspicuous even if this method is applied to the ribs of the vehicle interior parts.

The present invention has been made in view of the above point, and an object of the present invention is to change the shape of the rib on the base end side so that the cooling solidification rate of the forming raw material in the rib and its surroundings is increased. It is about trying to eliminate the sudden change in and make the sink mark inconspicuous.

[0007]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the solution means of the present invention is a vehicle interior product having a rigid foam base material and ribs integrally formed on the back surface of the rigid foam base material. That is, a thick wall portion whose rib width gradually increases toward the hard foam base material is provided on the side.

[0008]

[Action]

 With the above configuration, in the present invention, the rib width of the thick portion provided on the rib proximal end side of the hard foam base material is gradually increased as the rib approaches the hard foam base material. The thickness does not change suddenly, and therefore the cooling and solidification speed of the forming raw material gradually changes from the rib periphery to the inside and does not change suddenly, and the sink mark becomes inconspicuous.

[0009]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 3 and 4 show a door trim A as a vehicle interior component according to an embodiment of the present invention. The door trim A is constituted by a skin material 1 such as polyvinyl chloride and a hard foam base material 3 such as hard foam urethane integrally molded on the back surface of the skin material 1, and the hard foam base material 3 is Five ribs 5, 5, ... Are integrally projected on the back surface of the upper end at predetermined intervals. Each of the ribs 5 is formed integrally with the hard foaming base material 3 at the same time when it is formed by using the same forming raw material, and contacts the upper end of the door inner panel 7 with the door trim A assembled to the door inner panel 7. It is designed to do.

Further, as a feature of the present invention, the rib width W is gradually increased on the base end side of each rib 5 as it approaches the hard foam substrate 3, as shown in detail in FIGS. 1 and 2. A thick portion 9 is formed. In other words, from the middle of the thick portion 9 of each rib 5 to the base end side, the transverse cross section has a triangular prism shape that widens toward the base end side, while from the middle to the tip end side. The panel contact portion 11 is configured to have a narrow plate shape with a uniform rib width W. Incidentally, as an example of a preferable shape, the thickness t1 of the hard foam substrate 3 is 3 to 6 mm, the thickness t2 of the thick portion 9 of the rib 5 is 15 mm or less, and the inclination angle θ of the thick portion 9 is 30 °. .

Therefore, since the thickness of each rib 5 and its surroundings do not suddenly change, the cooling and solidifying speed of the forming raw material also gradually changes from the vicinity of the ribs 5 toward the inside and does not change suddenly, so that the sink marks are less noticeable. it can.

In the above embodiment, the case where the vehicle interior component is the door trim A is shown, but it may be an instrument panel or the like.

[0014]

[Effect of the device]

 As described above, according to the present invention, since the rib proximal end side of the back surface of the rigid foam base material is provided with the thick wall portion where the rib width gradually increases toward the rigid foam base material, the rib and the periphery thereof are formed. It is possible to eliminate a sudden change in the cooling and solidification rate of the forming raw material and make sink marks inconspicuous.

[Brief description of drawings]

1 is a cross-sectional view taken along line I-I of FIG.

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

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a front view of a door trim.

[Explanation of symbols]

 3 Hard foam base material 5 Rib 9 Thick part A Door trim (vehicle interior product) W Rib width

Claims (1)

[Scope of utility model registration request] 1. An interior article for a vehicle, comprising a rigid foam base material and ribs integrally formed on the back surface of the rigid foam base material,
An interior part for a vehicle, wherein a thick-walled portion whose rib width gradually increases toward the hard foam base material is provided on the proximal end side of the rib.