Casting valve with a post-compression piston

Patent metadata

Field	Value
Publication number	US-9457400-B2
Application number	US-201414280679-A
Country	US
Kind code	B2
Filing date	May 19, 2014
Priority date	May 27, 2013
Publication date	Oct 4, 2016
Grant date	Oct 4, 2016

Abstract

A casting valve configured to supply a melt of a casting device includes a valve housing including a melt channel connection as an inlet and a valve outlet as a run-out. A melt channel is configured to be pressurizable via a casting pressure. A valve compartment is configured to receive the melt. The valve compartment is connectable via the melt channel connection with the melt channel. A closing device is configured to modify a cross-sectional surface of the valve outlet. A post-compression piston is configured to post-compress the melt after a completion of a mold filling.

First claim

What is claimed is:

1. A casting valve configured to supply a melt of a casting device, the casting valve comprising:
a valve housing comprising a melt channel connection as an inlet, a valve outlet as a run-out, and an inner wall;
a melt channel configured to be pressurizable via a casting pressure;
a valve compartment configured to receive the melt, the valve compartment being connectable via the melt channel connection with the melt channel;
a closing device configured to modify a cross-sectional surface of the valve outlet, the closing device being provided as a valve piston so as to form a cone-shaped valve seat together with a part of the inner wall of the valve housing;
a post-compression piston configured to post-compress the melt after a completion of a mold filling, the post-compression piston being arranged coaxially to the valve piston and being configured to be movable relative thereto;
a first piston drive configured to drive the valve piston; and
a second piston drive configured to drive the post-compression piston.

2. The casting valve as recited in claim 1 , wherein,
the inner wall of the valve housing comprises a tapered part with a conical configuration, and
the valve piston comprises a crowned piston skirt-surface configured to form a linear contact with the inner wall of the valve housing during a closing.

3. The casting valve as recited in claim 1 , wherein at least one of the first piston drive and the second piston drive are configured as a hydraulic drive.

4. The casting valve as recited in claim 1 , wherein the casting valve further comprises a heating device configured to heat the valve compartment.

5. The casting valve as recited in claim 1 , wherein the casting valve further comprises isolation configured to thermally isolate the valve piston from the first piston drive.

6. A casting device for die casting, the casting device comprising:
a mold cavity; and
a casting valve as recited in claim 1 ,
wherein the casting valve is arranged directly on a gate area or directly on the mold cavity.

Assignees

• Schuler Pressen Gmbh

Inventors

• Fahrenbach Juergen
• Gaebges Martin
• Richter Michael
• Schwarz Tobias

Classifications

• B22D27/11 Primary

  making use of mechanical pressing devices · CPC title

• B22D17/203

  Injection pistons (B22D17/2053 takes precedence; for plastics B29C45/53) · CPC title

• B22D17/2069

  Exerting after-pressure on the moulding material · CPC title

• B22D17/2015

  Means for forcing the molten metal into the die (for plastics B29C45/46) · CPC title

• B22D17/2076

  Cutting-off equipment for sprues or ingates (for plastics B29C45/38) · CPC title