Mold forming apparatus

Abstract

A mold forming apparatus includes: a storage tank having in its bottom injection ports capable of being opened and closed, and storing a foamed mixture; a forming mold having runners, corresponding to injection ports, into which the foamed mixture is introduced through storage tank injection ports, and having cavities for forming the introduced foamed mixture into a mold in a predetermined shape; and a pressing device disposed to correspond to the forming mold and pressing the foamed mixture stored in the storage tank to inject the foamed mixture into cavities through runners of the forming mold. A parting surface of the forming mold is formed parallel to a pressing direction of the pressing device, and runners of the forming mold are formed in the parting surface and are tilted with respect to the pressing direction of the pressing device to spread apart from inlets toward outlets guided to the cavities.

1 . A mold forming apparatus including:
 a storage tank that has in its bottom a plurality of injection ports capable of being opened and closed, and that stores a foamed mixture formed by agitating a granular aggregate and an additive,   a forming mold that has a plurality of runners into which the foamed mixture is introduced through their inlets formed so as to correspond to the respective injection ports of the storage tank, and that has a cavity for forming the introduced foamed mixture into a mold with a predetermined shape, and   a pressing means that is disposed so as to correspond to the forming mold and that presses the foamed mixture stored in the storage tank to inject the foamed mixture into the cavity through the runners of the forming mold, wherein   a parting surface of the forming mold is formed parallel to a pressing direction of the pressing means, and   each of the runners of the forming mold is formed in the parting surface and is tilted with respect to the pressing direction of the pressing means so as to spread apart from the inlet toward its outlet guided to the cavity.   
     
     
         2 . The mold forming apparatus according to  claim 1 , wherein the runners extend from the inlets and branch off in an intermediate portion on a downstream side being allowed to obtain the plurality of the outlets guided to the cavity.