Casting mold making method and casting mold making system
AssigneeMazda Motor Corporation
InventorsYuji Hori, Shoichi Nishi, Naohiro Miura, Yuya Fukuta
Life of this patent
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Abstract
In blowing gas-curing casting sand, which is accommodated in a receiver of a blow head, into a cavity in molding dies and thereby packing it into the cavity, prior to the blowing and packing of the casting sand into the cavity, the casting sand in the receiver is stirred by a stirrer until the stirring resistance of the stirrer enters a predetermined range (a range corresponding to an optimum bulk density range of casting sand within which casting sand can efficiently blow out through blow nozzles).
Claims7
A method for making a casting mold, comprising:
- a blowing and packing step of feeding pressurized gas into a receiver that is provided in a blow head and accommodates gas-curing casting sand, thereby blowing the casting sand in the receiver into a cavity in molding dies through a blow nozzle that is provided in the blow head and communicates with the receiver and packing the casting sand into the cavity;
- a curing step of, after the blowing and packing step, introducing curing gas into the cavity to cure the casting sand packed in the cavity;
- and
- a stirring step of, before the blowing and packing step, stirring the casting sand in the receiver with a stirrer until the stirring resistance of the stirrer enters within a predetermined range.
A casting mold making system including a blow head having a receiver for accommodating gas-curing casting sand and a blow nozzle communicating with the receiver and a pressurized gas feed system for feeding pressurized gas into the receiver of the blow head and configured to feed pressurized gas into the receiver through the pressurized gas feed system and thereby blow the casting sand in the receiver through the blow nozzle into a cavity in molding dies and pack the casting sand into the cavity, the casting mold making system further comprising:
- a stirrer for stirring the casting sand in the receiver;
- a stirrer drive unit for driving the stirrer;
- a stirring resistance detection device for detecting the stirring resistance of the stirrer;
- and
- an operation controller for controlling the operation of the stirrer drive unit, the operation controller being configured to, prior to the feeding of pressurized gas into the receiver through the pressurized gas feed system, operate the stirrer drive unit until the stirring resistance detected by the stirring resistance detection device enters within a predetermined range.
Dependencies are inferred from the claim text.