US 11,911,820 B2
Die casting machine, die casting machine equipped with dies, control device for die casting machine, and die casting process
Shugo Matsuzawa, Musashino (JP); Masaki Fujimoto, Zama (JP); Satoru Aida, Tokyo (JP); Toshiaki Toyoshima, Zama (JP); and Yuichi Maki, Izu (JP)
Assigned to SHIBAURA MACHINE CO., LTD., Tokyo (JP)
Appl. No. 17/432,394
Filed by SHIBAURA MACHINE CO., LTD., Tokyo (JP)
PCT Filed Sep. 27, 2019, PCT No. PCT/JP2019/038342
§ 371(c)(1), (2) Date Aug. 19, 2021,
PCT Pub. No. WO2020/170490, PCT Pub. Date Aug. 27, 2020.
Claims priority of application No. 2019-028549 (JP), filed on Feb. 20, 2019.
Prior Publication US 2022/0193759 A1, Jun. 23, 2022
Int. Cl. B22D 17/32 (2006.01); B22D 17/00 (2006.01); B22D 17/10 (2006.01); B22D 17/22 (2006.01); B22D 17/26 (2006.01)
CPC B22D 17/32 (2013.01) [B22D 17/002 (2013.01); B22D 17/10 (2013.01); B22D 17/22 (2013.01); B22D 17/26 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A die casting machine comprising:
a clamping device configured to perform opening, closing, and clamping of a pair of dies, wherein a mold opening/closing direction of the clamping device is inclined at an angle less than 45° relative to a horizontal direction or is arranged in the horizontal direction;
an injection device configured to make a plunger move forward in a sleeve communicated with a cavity between the pair of dies to thereby inject a molten metal into the cavity, wherein a plunger driving direction of the injection device is inclined at an angle less than 45° relative to the horizontal direction or is arranged in the horizontal direction;
a molten metal feed device configured to feed the molten metal into the sleeve; and
a control device configured to control the clamping device, the injection device, and the molten metal feed device, wherein
the control device comprises:
a gap control part configured to control the clamping device so as to make mating surfaces of the pair of dies face each other across a gap, and thereby the cavity and an external part of the pair of dies are communicated with each other across the gap,
a molten metal feed control part configured to control the molten metal feed device so as to feed the molten metal into the sleeve while the gap is being maintained,
an injection control part configured to control the injection device so as to start a forward movement of the plunger while the gap is maintained and there is the molten metal in the sleeve, and
a clamping control part configured to control the clamping device so as to make the mating surfaces abut against each other to eliminate the gap after start of the forward movement of the plunger and before the molten metal has reached a molten metal surface height at which the molten metal flows into the gap.
 
12. A die casting machine comprising:
a clamping device configured to perform opening, closing, and clamping of a pair of dies;
an injection device configured to make a plunger move forward in a sleeve communicated with a cavity between the pair of dies to thereby inject a molten metal into the cavity;
a molten metal feed device configured to feed the molten metal into the sleeve; and
a control device configured to control the clamping device, the injection device, and the molten metal feed device, wherein
the control device comprises:
a gap control part configured to control the clamping device so as to make mating surfaces of the pair of dies face each other across a gap, and thereby the cavity and an external part of the pair of dies are communicated with each other across the gap,
a molten metal feed control part configured to control the molten metal feed device so as to feed the molten metal into the sleeve while the gap is being maintained,
an injection control part configured to control the injection device so as to start a forward movement of the plunger while the gap is maintained and there is the molten metal in the sleeve, and
a clamping control part configured to control the clamping device so as to make the mating surfaces abut against each other to eliminate the gap after a start of the forward movement of the plunger and before the molten metal has reached a molten metal surface height at which the molten metal flows into the gap, and
the injection control part is configured to control the injection device so as to make the plunger move forward without stopping the plunger from the start of the forward movement of the plunger in a state where the gap is maintained until the gap is eliminated and filling of the molten metal into the cavity is completed.
 
13. A control device for a die casting machine, configured to control a machine body in a die casting machine wherein a mold opening/closing direction is inclined at an angle less than 45° relative to a horizontal direction or is arranged in the horizontal direction and a plunger driving direction is inclined at an angle less than 45° relative to the horizontal direction or is arranged in the horizontal direction, comprising:
a gap control part configured to control the machine body so as to make mating surfaces of a pair of dies face each other across a gap, and thereby a cavity in the pair of dies and an external part of the pair of dies are communicated across the gap;
a molten metal feed control part configured to control the machine body so as to feed molten metal into a sleeve communicated with the cavity while the gap is being maintained;
an injection control part configured to control the machine body so as to start a forward movement of a plunger in the sleeve toward the pair of dies while the gap is maintained and there is the molten metal in the sleeve; and
a clamping control part configured to control the machine body so as to make the mating surfaces abut against each other to eliminate the gap after a start of the forward movement of the plunger and before arrival of the molten metal at a molten metal surface height at which the molten metal flows into the gap.