Method and installation for low pressure die casting in a mould ceramic casting die
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 23, 2002
Grant Date -
N/A
app pub date -
Nov 18, 1999
filing date -
Jan 7, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Placed in a box (1) is a ceramic shell (21) delimiting a casting space (22), the shell being surrounded by a mass of binder-free sand (23). The casting space is connected to a source (4) of liquid metal located underneath, in which are applied, in succession, a pressure (P1) bringing the liquid to the threshold of the casting space (22), a pressure (P2) slightly greater than that necessary for filling this space, and then a marked overpressure (P3); finally, the pressure is brought back down to the first value (P1). When the casting space has been filled, an underpressure is created in the space containing the mass of sand (23) in order to prevent any deformation of the shell (21) due to the overpressure (P3), at least until the formation of a metal skin against the shell and at most until the start of the reduction in the overpressure in the source (4) of liquid metal.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully