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1. 发明申请

US20210379652A1 Casting Unit for a Die Casting Machine 有权
公开(公告)号：US20210379652A1
公开(公告)日：2021-12-09
申请号：US17337507
申请日：2021-06-03
申请人： Oskar Frech GmbH + Co. KG
发明人： Daniel GERNER , Juergen KURZ , Andreas SYDLO
IPC分类号： B22D17/32 , B22D17/20 , B22D17/28 , B22D39/02 , B22D17/04
摘要： A casting unit for a die casting machine has a casting container with a casting chamber, a casting piston, which is arranged in an axially movable manner in the casting chamber, a melt bath connection opening, a melt inlet channel from the melt bath connection opening to the casting chamber, a melt outlet channel, which leads out of the casting chamber separately from the melt inlet channel, and a shut-off control valve for the melt inlet channel. The shut-off control valve has a valve main body arranged on the casting container, a valve seat and a valve closing body. The valve main body is held on the casting container at a lateral valve assembly region of the casting container in a manner accessible from the outside and includes the melt bath connection opening, and/or the casting piston is of a spool type, and the shut-off control valve is located with its valve closing body in the melt inlet channel at a flow-technical distance from the melt bath connection opening on the one hand and from the casting chamber on the other hand.

2. 发明申请

US20210394260A1 Die-Casting Machine and Operating Method 有权
公开(公告)号：US20210394260A1
公开(公告)日：2021-12-23
申请号：US17352935
申请日：2021-06-21
申请人： Oskar Frech GmbH + Co. KG
发明人： Daniel GERNER , Andreas SYDLO
IPC分类号： B22D17/32 , B22D17/20 , B22D17/04
摘要： A die-casting machine has a casting mould, a casting chamber, a casting piston arranged in an axially movable manner in the casting chamber, a melt inlet channel which leads into the casting chamber, a shut-off valve in the melt inlet channel, a melt outlet channel which leads from the casting chamber to the casting mould, and a control unit for controlling the casting piston. The control unit and the shut-off valve are configured, after completing a filling phase 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.

3. 发明公开

US20230398602A1 Die-Casting Machine Having a Shut-off Valve in the Melt Inlet Channel and Operating Method 审中-公开
公开(公告)号：US20230398602A1
公开(公告)日：2023-12-14
申请号：US18266522
申请日：2021-12-01
申请人： KG OSKAR FRECH GMBH + CO. KG
发明人： Daniel GERNER , Andreas SYDLO
IPC分类号： B22D17/32 , B22D17/20 , B22D17/02
CPC分类号： B22D17/32 , B22D17/2069 , B22D17/203 , B22D17/02
摘要： A die-casting machine has a casting mould, a casting chamber, a casting piston arranged in an axially moveable manner in the casting chamber, a melt inlet channel which leads into the casting chamber, a shut-off valve in the melt inlet channel, a melt outlet channel which leads from the casting chamber to the casting mould, and a control unit for controlling the casting piston. For carrying out a respective casting process, the die-casting machine is configured, for a mould-filling phase, to bring the shut-off valve into a closed position, and to control the casting piston in the casting chamber to advance from a casting start position to a filling end position, in order to press melt material into the casting mould via the melt outlet channel, and, for a subsequent refilling phase, to bring the shut-off valve into an open position and to control the casting piston to move back to the casting start position, in order to supply the casting chamber with melt material via the melt inlet channel. A closure nozzle is provided in the melt outlet channel. The machine is configured to keep the closure nozzle closed in the refilling phase and, in the mould-filling phase, with the shut-off valve remaining closed, to firstly move the casting piston back from the casting start position to an additional stroke position and to subsequently advance it from the additional stroke position via the casting start position to the filling end position, and at this time to keep the closure nozzle closed during the return movement of the casting piston to the additional stroke position and to only open it when the casting piston advances again.

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