Patent AU-2021203959-A1 (AU)
Title: Die-casting machine and operating method
Inventor: GERNER DANIEL
IPC: B22D17/20
Filed: 2021-06-15
Abstract: 1. Die-casting machine and operating method.  
2.1 The invention relates to a die-casting machine which 
has a casting mould (1), a casting chamber (2), a casting 
piston (3) arranged in an axially movable manner in the 
casting chamber, a melt inlet channel (4) which leads 
into the casting chamber, a shut-off valve (5) in the 
melt inlet channel, a melt outlet channel (6) which leads 
from the casting chamber to the casting mould, and a 
control unit (7) for controlling the casting piston, and 
to a method for operating such a die-casting machine.  
2.2 In the case of the die-casting machine according to 
the invention, according to one aspect of the invention, 
for carrying out a respective casting process in a mould
filling phase, the control unit (7) and the shut-off 
valve (5) are configured to bring the shut-off valve (5) 
into a closed position and to control the casting piston 
(3) in the casting chamber (2) to advance from a casting 
start position to a filling end position, in order to 
press melt material (14) into the casting mould (1) via 
the melt outlet channel (6), and in a subsequent 
refilling phase firstly to bring the shut-off valve into 
an open position and to control the casting piston to 
move back into the casting start position, in order to 
supply the casting chamber with melt material via the 
melt inlet channel, and to control the shut-off valve 
into its closed position again before the casting piston 
has reached its casting start position by virtue of its 
return movement, and to control the casting piston to 
back-suction melt material in the melt outlet channel by 
virtue of the further return movement of the casting 
piston.  
2.3 Use, e.g. in hot-chamber die-casting machine 
technology.
- 54 
3. Figure 1.
1/5 
1 
7a 
7 .0 7c 
13 12 6 11 7b 
SH 5d9a 
6b H5 
- ---- ---- 5 a 
1b 1a BS -- 
; -- 4a 
3 _ _ _- - -_ _ _ _ - 5 b 
6a------ - 5;5S 
--- - - ----- --- - -- 5 
1-------- -- - - -8 ----------------------- 10 
Fig. 1 
B1 B2 B3 B4 
Start of operation Mould-filling phase, End of mould-filling phase, Stop of refilling 
Ist cycle start of refilling phase 
Melt at bath level Press melt into mould Cool cast part 
via outlet channel Cool cast part 
Valve open Valve closed Valve opens Valve closes 
Mould open Mould closed Mould closed 
Mould closed 
Casting piston in Move casting piston back Casting piston in 
operating start position Advance casting piston from filling end position valve switchover position 
from operating start 
position 
into filling end position 
Mould-filling phase, 
Start of back-suctioning Endofback-uctloning Endof1stcycle 2nd cycle 
Coolcsat iRemov castpart, melt Press melt into 
col as prtColcat arin front outlet- mould via outlet channel 
o ameltbac-suctioned channel region 
Valve closed Valve closed 
Valve closed Valve closed 
Mould closed Mould closed 
Mould closed Open mould 
Move casting piston back Advance casting piston 
into casting start position Casting piston in Casting piston in from 
casting start position casting start position casting start position 
intofilling endposition 
B5 B6 B7 Fig. 2 B8