JP2891039B2 - Car storage box - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automobile storage box.

[0002]

2. Description of the Related Art A conventional automobile storage box will be described below with reference to FIGS.

An automobile storage box h has a deep concave portion m having a substantially U-shaped cross section, and is formed of resin.

[0004] A mold structure a for molding the storage box h includes:
An intermediate matrix structure including a core mold b and a cavity mold surrounding the core mold. The cavity mold is divided into a fixed mold c and a movable mold d, and a gate f is formed on a side surface of the fixed mold c. . After the molten resin is introduced into the cavity e from the gate f to form the storage box h, the movable box d is opened, and then the storage box h is protruded by the ejector pins g penetrating the inside of the core mold b so as to be automatically dropped. , Molding cycle up is measured.

[0005]

However, in the above-mentioned conventional structure, since the gate f is located on the side surface of the fixed mold c, the core mold b is pushed by the injection pressure from the gate f, and is indicated by a chain line in FIG. It may be deformed as shown. For this reason, there is a problem that bending stress is generated in the core mold b and the molding is unstable, the mold is damaged by the injection pressure and the thickness of the product is uneven due to the fall of the mold, and the quality of the storage box h is unstable. Was.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide an automobile storage box which does not cause a product defect due to a mold falling due to a mold fall or a mold breakage.

[0007]

In order to achieve this object, an automobile storage box according to the present invention has a cross section formed by introducing a molten resin into a gap between a core mold and a cavity mold surrounding the core mold. An automobile storage box having a U-shaped concave portion, wherein a gate is set at a position facing a terminal portion of the core mold, and the cavity mold provided to prevent the core mold from falling down due to molding resin pressure. Has a configuration in which a through hole corresponding to the holding projection is formed at the lower end of the box body.

[0008]

According to this structure, since the holding projection of the cavity mold is in contact with the core mold, the core mold does not collapse and the product does not become uneven due to the mold collapse. This can also prevent the mold from being damaged by the pressure of the molding resin.

Further, since a through hole corresponding to the holding projection is formed in the box body, this hole can be used for removing dust.

[0010]

Embodiment (Embodiment 1) An embodiment of the present invention will be described below with reference to FIGS.

In FIG. 1, an automobile storage box 10 is formed by molding a box body 9 having a deep concave portion having a substantially U-shaped cross section. Two through holes 8 are provided near the lower ends of the front surface 9a and the rear surface 9b of the box body 9, respectively.
Are formed.

FIG. 3 is a partial sectional view of a mold 1 for molding a storage box. The molding die 1 includes a core die 2 and a cavity die 3 surrounding the core die 2, and the cavity die 3 is divided into a fixed die 4 and a movable die 5. A gap between the core mold 2 and the cavity mold 3 is formed in the cavity 6, and the molten resin is introduced into the cavity 6 to form the storage box 10.

At the lower ends of the fixed mold 4 and the movable mold 5, a holding projection 7 of an appropriate size is formed to prevent the core mold 2 from falling down due to molding resin pressure. End face 7a is in contact with the core mold 2. Further, the gate position 6a is set to a position facing the core type 2 terminal portion, so that the molten resin flows upward from the bottom surface of the box body 9, and the arrival speed of the molten resin on the front surface 9a and the rear surface 9b is made the same. This is set so that no bending stress is generated in the core mold 2.

When the molten resin is introduced into the molding die 1 as described above, the holding projection 7 penetrates the cavity 6 and the core die 2
, The through hole 8 corresponding to the holding projection 7 is formed in the box body 9. Further, since the holding projections 7 of the cavity mold 3 are in contact with the core mold 2, the core mold 2 does not collapse and the storage box 10 does not become uneven due to the mold collapse. This can also prevent the mold from being damaged by the pressure of the molding resin. Further, by making the through-holes 8 have an appropriate size, a sense of discomfort from the surface can be eliminated and the through-holes 8 can be used as dust removal.

[0015]

As described above, the present invention relates to an automobile storage box having a concave portion having a substantially U-shaped cross section formed by introducing a molten resin into a gap between a core mold and a cavity mold surrounding the core mold. A gate is set at a position facing a terminal portion of the core mold, and a holding protrusion of the cavity mold provided to prevent the core mold from falling down due to molding resin pressure is in contact with the core mold. Since the through holes corresponding to the holding projections are formed at the lower end of the box body, the thickness of the product does not become uneven due to the falling of the mold, and the mold can be prevented from being damaged by the molding resin pressure.

Further, since the through holes corresponding to the holding projections are formed in the box main body, the through holes are utilized for removing dust, the inside of the storage box is kept clean, and there is no unnatural feeling as a product. .

[Brief description of the drawings]

FIG. 1 is a perspective view of an automobile storage box showing one embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a partial sectional view of a molding die of the automobile storage box.

FIG. 4 is a perspective view of a holding projection portion of a molding die of the automobile storage box.

FIG. 5 is a cross-sectional view of a molding die of a conventional automobile storage box.

FIG. 6 is an explanatory view of an operation of a molding die of the automobile storage box.

FIG. 7 is a partial cross-sectional view of a molding die of the automobile storage box.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Molding die 2 Core type 3 Cavity type 6a Gate 7 Holding projection 8 Through hole 9 Box body 10 Automobile storage box

Claims (1)

(57) [Claims] 1. An automobile storage box having a recess having a substantially U-shaped cross section formed by introducing a molten resin into a gap between a core mold and a cavity mold enclosing the core mold, wherein a terminal portion of the core mold is provided. Set the gate at the position toward
A holding projection of the cavity mold provided for preventing the core mold from falling down due to molding resin pressure is in contact with the core mold, and a through hole corresponding to the holding projection is formed at a lower end of the box body. A storage box for a car, characterized in that: