US 11,925,975 B2
Die casting machine
Makoto Tsuji, Zama (JP); Yuto Hayashi, Zama (JP); and Saburo Noda, Zama (JP)
Assigned to SHIBAURA MACHINE CO., LTD., Tokyo (JP)
Filed by SHIBAURA MACHINE CO., LTD., Tokyo (JP)
Filed on Nov. 10, 2021, as Appl. No. 17/454,390.
Application 17/454,390 is a division of application No. PCT/JP2020/018375, filed on May 1, 2020.
Claims priority of application No. 2019-094042 (JP), filed on May 17, 2019.
Prior Publication US 2022/0062978 A1, Mar. 3, 2022
Int. Cl. B22D 17/10 (2006.01); B22D 17/14 (2006.01); B22D 17/20 (2006.01); B22D 17/28 (2006.01); B22D 17/30 (2006.01); B22D 17/32 (2006.01); B22D 39/00 (2006.01)
CPC B22D 17/10 (2013.01) [B22D 17/145 (2013.01); B22D 17/2023 (2013.01); B22D 17/203 (2013.01); B22D 17/28 (2013.01); B22D 17/30 (2013.01); B22D 17/32 (2013.01); B22D 39/006 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A die casting machine comprising:
a holding furnace configured to hold molten metal;
a sleeve located outside the holding furnace, the sleeve connected to an inside of a mold, and the sleeve including a molten metal supply port;
a plunger configured to slide through the sleeve and including a plunger rod and a plunger tip fixed to a tip of the plunger rod;
a molten metal supply pipe pushed against the sleeve to cover the molten metal supply port and configured to supply the molten metal into the sleeve;
a pushing force variable mechanism configured to reduce a pushing force of the molten metal supply pipe against the sleeve when the plunger is sliding; and
a first sensor facing a predetermined height between a lowermost portion and an uppermost portion of an inner surface of the sleeve and configured to detect that the molten metal in the sleeve reaches the predetermined height.
 
13. A die casting machine comprising:
a holding furnace configured to hold molten metal;
a sleeve located outside the holding furnace, the sleeve connected to an inside of a mold, and the sleeve including a molten metal supply port;
a plunger configured to slide through the sleeve and including a plunger rod and a plunger tip fixed to a tip of the plunger rod;
a molten metal supply pipe pushed against the sleeve to cover the molten metal supply port and configured to supply the molten metal into the sleeve; and
a pushing force variable mechanism configured to reduce a pushing force of the molten metal supply pipe against the sleeve when the plunger is sliding;
wherein the sleeve includes a gas vent port provided at an upper portion, and wherein the die casting machine further comprises a second sensor provided above the gas vent port and configured to supply a molten metal surface position of the molten metal in the sleeve.