EP 0018232 A1 19801029 - Apparatus for inverting a sand mold.
Title (en)
Apparatus for inverting a sand mold.
Title (de)
Vorrichtung zum Wenden einer Sandform.
Title (fr)
Appareil pour tourner un moule en sable.
Publication
Application
Priority
US 3217979 A 19790423
Abstract (en)
Apparatus for and methods of inverting a sand mold wherein the apparatus comprises opposing upper and lower jaws (104 and 106) each having a plurality of roilers (48). The jaws are supported in a vertical frame (108) rotatably mounted on a stand (102). A rotary actuator (110) is provided to rotate the vertical frame about a horizontal axis and thus invert a sand mold clamped between hydraulically actuated arms (192) of the jaw (106). The rotation of the frame (108) and thus the jaws is controlled by means of a counterbalance valve which regulates the rate of delivery of hydraulic fluid from a pressure compensated pump to the rotary actuator (110). The rate of rotation of the jaws can therefore be adjusted so that even when a load is substantially off centre rotation starts and stops gradually preventing fracture of the mold. The apparatus is electrically controlled to enable a continuous sequence of operations to be performed.
IPC 1-7
IPC 8 full level
B22C 11/00 (2006.01); B22C 17/00 (2006.01); B22C 25/00 (2006.01); B22D 33/02 (2006.01)
CPC (source: EP)
B22C 17/00 (2013.01); B22D 33/02 (2013.01)
Citation (search report)
- CH 350432 A 19601130 - BADISCHE MASCHINENFABRIK AG SE [DE]
- FR 965845 A 19500922
- CH 356569 A 19610831 - BADISCHE MASCHINENFABRIK AG [DE]
- DE 1133511 C
- FR 1052872 A 19540128 - FERRO ENG CO
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
DOCDB simple family (application)
EP 80301293 A 19800422; JP 5244980 A 19800422