PRESSURE CONTROLLING METHOD FOR CASTING APPARATUS

WIPO Patent Application WO/2016/185610

A1

This pressure controlling method uses a casting apparatus 1 provided with a holding furnace 3 having a reserve of a molten metal 2, a metal mold 5 forming a cavity 4, an intra-furnace pressure application means 6 for applying pressure inside the holding furnace 3, and a cavity pressure reduction means 7 for reducing pressure inside the cavity 4. Casting is performed while applying pressure to and loading the cavity 4 with the molten metal 2 by the intra-furnace pressure application means 6, and reducing pressure inside the cavity 4 by the cavity pressure reduction means 7. At that moment, casting is performed by the pressure controlling method such that the operation of at least one means of the intra-furnace pressure application means 6 and the cavity pressure reduction means 7 is configured so as to set the pressure gradient of the differential pressure between the pressure application by the intra-furnace pressure application means 6 and the pressure reduction by the cavity pressure reduction means 7 to be equal to or less than a predetermined value. As a result, the ability to control the flow of the molten metal 2 is improved even when performing casting in which loading of the molten metal 2 into the cavity 4 is conducted in a short period of time.

JP6899032	Casting equipment and casting method
JP3196148	LOW PRESSURE CASTING DEVICE
JPS5855166	METHOD AND DEVICE FOR CASTING

SATO TAKESHI (JP)
MASUTA TATSUYA (JP)
OTA SHUNSUKE (JP)
HAYASHI KENJI (JP)
SHIGA HIDETOSHI (JP)
SUGIYAMA YUUTA (JP)

PCT/JP2015/064631

November 24, 2016

May 21, 2015

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NISSAN MOTOR (JP)

B22D18/08; B22D18/04

JPH05169231A	1993-07-09
JPH0596356A	1993-04-20

MATOBA, Motonori (JP)
的場 基憲 (JP)

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