CORE SAND FILLING METHOD

摘要

The core sand filling method comprises a step of operating an aeration air supply means, so as to float and fluidize core sand within a sand blow chamber and, when a pressure Pf of the sand blow chamber measured by the first pressure sensor reaches a first pressure, operating a compressed air supply means and a step of stopping the aeration air supply means and compressed air supply means from operating when each of the pressure Pf within the sand blow chamber and a pressure Pc within a sand storage chamber is a second pressure or higher while a differential pressure ΔP=Pc−Pf is a third pressure or lower.

主权项

1. A core sand filling method for filling a cavity of a core box with core sand from a blow head having a sand blow chamber and a sand storage chamber, the method comprising:
a first step of supplying an aeration air into the sand blow chamber by aeration air supply means in a state where the blow head and the core box communicate with each other while the blow head is located under the core box, so as to float and fluidize the core sand within the sand blow chamber; a second step of supplying a compressed air into the sand storage chamber by compressed air supply means according to an instruction from a control unit when a pressure within the sand blow chamber reaches a first pressure, so as to fill the cavity of the core box with the floated and fluidized core sand from within the sand blow chamber after the first step; a third step of determining after the second step by the control unit according to pressures within the sand blow chamber and sand storage chamber whether or not the filling of the cavity with the core sand is completed and stopping respective operations of the aeration air supply means and compressed air supply means according to an instruction from the control unit when the filling is completed; and a fourth step of evacuating the compressed air from within the sand blow chamber after the third step.