EP 0168635 B1 19901010 - APPARATUS FOR HARDENING SAND CORES AND/OR SAND MOULDS WITH A HARDENABLE BINDER
Title (en)
APPARATUS FOR HARDENING SAND CORES AND/OR SAND MOULDS WITH A HARDENABLE BINDER
Publication
Application
Priority
DE 3422742 A 19840619
Abstract (en)
[origin: US4644994A] An apparatus for hardening cores and/or molds made of sand with the addition of hardenable binding agents, which are used for casting molded bodies from flowable substances, is described, whereby an amount, predetermined by metering devices controlled via control valves, of the substance which causes the binding agent to harden is introduced into the core or mold by aid of compressed air the rate of flow of which is regulatable by a regulating valve, whereby this substance is mixed with this compressed air, and the regulating valve is automatically controlled according to a predetermined schedule. The apparatus can be carried out with considerably fewer components and the necessary control means can in particular be designed much more simply if, according to one embodiment, the regulating valve is controlled by means of a proportional pressure regulating valve which is operated by an external control means which also controls the other control valves. As an alternative to this, the regulating valve can be controlled, according to a second embodiment, via a preadjustable pressure regulating valve and a directional valve which is controlled electrically or pneumatically.
IPC 1-7
IPC 8 full level
B22C 9/12 (2006.01)
CPC (source: EP US)
B22C 9/123 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI NL
DOCDB simple family (publication)
EP 0168635 A2 19860122; EP 0168635 A3 19880120; EP 0168635 B1 19901010; AT E57320 T1 19901015; DE 3422742 A1 19851219; DE 3422742 C2 19870716; DE 3580065 D1 19901115; US 4644994 A 19870224
DOCDB simple family (application)
EP 85107249 A 19850612; AT 85107249 T 19850612; DE 3422742 A 19840619; DE 3580065 T 19850612; US 74382985 A 19850612