JP2001079643A5 - - Google Patents

Description

[Title of the Invention] formed molded article and the casting mold

[0011]
[Means for Solving the Problems]
The present invention is, in one aspect, a mold for casting molding in which molten metal is poured from one sprue, wherein the sprue is a flow path in which the flow path length of the molten metal flowing in the mold is substantially equal in each direction. It provided in the central portion, and has a runner extending branches from the sprue dendritic provides casting mold and forming a cavity between the Aitonaru runner .

[0012]
In the present invention another aspect, a molded article formed by using a casting mold of the above, corresponds to a runner which is thicker than the portion corresponding mold odor Te in key Yabiti portion The part provides a molded article characterized in that it is formed in a raised form on the inner surface of the molded article.

[0015]
Incidentally, the thin-walled cavity portion (in the present specification, also simply referred to as the cavity portion) is a portion which forms most of the housing wall portion in the molded product, and each runner is branched and extends in a tree shape. It is provided as a part to communicate between adjacent ones. The thin-walled cavity has a minimum required thickness to form the housing wall of the molded article, and thus the flow cross-sectional area. On the other hand, since the runner is a portion for causing the molten metal to flow preferentially to the thin-walled cavity portion, the flow channel cross-sectional area relatively larger than the thin-walled cavity portion can be obtained by providing the flow channel height relatively large. have.

Claims (7)

A mold for casting molding in which molten metal is poured from one sprue, the sprue being provided at a central portion of the flow path where the flow path length of the molten metal flowing in the mold is substantially equal in each direction , It has a runner extending branches from the sprue dendritic casting mold and forming a cavity between the Aitonaru runner. A casting mold for forming a box-shaped molded article having a bottom and four peripheral surfaces, wherein one sprue is provided at a central portion of a portion corresponding to the bottom of the molded article The casting mold according to claim 1. With regard to the cross-sectional area perpendicular to the flow direction of the dendritic branch, the cross-sectional area of the runner just before branching and the sum of the cross-sectional areas of the runners immediately after branching are substantially equal. The casting mold according to claim 1 or 2, characterized in that it is set. The casting mold according to any one of claims 1 to 3, wherein a cross section perpendicular to the flow direction of the runner is a rectangular shape. The molded article formed by shape | molding with the metal mold | die in any one of Claims 1-4 using the magnesium-type alloy of a solid-liquid coexistence state. A molded article formed by using a casting mold according to claim 1, corresponding to a runner which is thicker than the portion corresponding mold odor Te in key Yabiti portion A part is formed in the form which raises to the inner surface of a molded article, The molded article characterized by the above-mentioned. The molded article according to claim 6, formed by using a magnesium-based alloy in a solid-liquid coexistence state.