| 摘要 |
PURPOSE:To inject and mold a single molding material while the material is divided into a plurality of stages, and to form the shape of an excellent external appearance and a desired shape by using a cavity die, to which a plurality of cavities are disposed in response to a single core die. CONSTITUTION:The core 11 of a bottom force 1 and the first cavity 21 of the top force 2 are made correspond to form a molding space, and primary injection molding is executed from an injection hole 21a. A primary shape I is attached to the bottom force 1, the die is opened, and a sprue is cut. The top force 2 is slid, the core 11 and a second cavity 22 are made correspond to form a molding space, secondary injection molding is executed from an injection hole 22a, and the aimed thick shape in which a secondary shape II is stacked integrally to the outer surface of the primary shape I is obtained. The boundary of the shapes I , II is shown in the figure separately on explanation, but an integral product is acquired actually. Accordingly, the thick and large-sized shape is obtained even by a small-sized molding machine, and the product hardly contains sink and weld. |
