EP 0203322 B1 19881123 - APPARATUS FOR COMPACTING A FOUNDRY MOULDING MATERIAL BY MEANS OF COMPRESSED GAS
Title (en)
APPARATUS FOR COMPACTING A FOUNDRY MOULDING MATERIAL BY MEANS OF COMPRESSED GAS
Publication
Application
Priority
DE 3518980 A 19850525
Abstract (en)
[origin: US4846253A] An apparatus for the compression of foundry moulding material by compressed gas, which comprises a pressure tank for the compressed gas forming an inlet pressure zone, a moulding zone positioned beneath the same constituted by a moulding box with filling frame and pattern plate with pattern, onto which the moulding material is loosely poured prior to compression, and a large-area valve arranged between the pressure tank and the moulding zone. The closure member thereof frees the valve opening in the pressure tank in a few milliseconds and moves into the inlet pressure zone. The closure member is driven by a pressure cylinder, whose piston on the lift side forms the moveable termination of a gas-pressurized pressure reservoir and by its opposite side is connected to a high pressure source. The high pressure-side outflow is constructed in such a way that the pressure medium flows out at a speed of more than 10 m/s, accompanied by the simultaneous acceleration of the piston, under the pressure in the pressure reservoir and the closure member into the raised open position.
IPC 1-7
IPC 8 full level
B22C 15/24 (2006.01); B22C 15/00 (2006.01); B22C 15/23 (2006.01)
CPC (source: EP US)
B22C 15/00 (2013.01 - EP US)
Designated contracting state (EPC)
CH DE FR GB IT LI
DOCDB simple family (publication)
EP 0203322 A1 19861203; EP 0203322 B1 19881123; DD 247161 A5 19870701; DE 3518980 A1 19861127; DE 3518980 C2 19930121; DE 3661242 D1 19881229; DK 241886 A 19861126; DK 241886 D0 19860523; JP 2553044 B2 19961113; JP S61269959 A 19861129; US 4846253 A 19890711
DOCDB simple family (application)
EP 86104663 A 19860405; DD 29053686 A 19860523; DE 3518980 A 19850525; DE 3661242 T 19860405; DK 241886 A 19860523; JP 11940686 A 19860526; US 14627088 A 19880120