CORE SAND FILLING DEVICE AND CORE SAND FILLING METHOD IN CORE MAKING MACHINE

摘要

This core sand filling device is for an underneath-blow type core making machine in which sand is blown from underneath the core mold toward the core mold and is provided with: the core mold; a blow head which is disposed beneath the core mold, is raisable and lowerable relative to the core mold, and is divided into a sand blowing chamber and a sand storage chamber that are linked to each other; a compressed air supply unit that is linked to the sand storage chamber and supplies compressed air to the sand storage chamber; an aeration air supply unit that is linked to the sand blowing chamber and supplies to the sand blowing chamber aeration air that forms a suspended fluidization of the core sand in the sand blowing chamber; and an exhaust valve that is linked to the sand blowing chamber and exhausts compressed air remaining in the sand blowing chamber.