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1. EP1878520 - METHOD FOR PREDICTING AND PREVENTING SHRINKAGE CAVITY OF IRON CASTING

Office
European Patent Office
Application Number 05737318
Application Date 26.04.2005
Publication Number 1878520
Publication Date 16.01.2008
Publication Kind A4
IPC
B29C 33/38
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
33Moulds or cores; Details thereof or accessories therefor
38characterised by the material or the manufacturing process
B22C 9/00
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
CFOUNDRY MOULDING
9Moulds or cores; Moulding processes
B22D 46/00
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
46Controlling, supervising, not restricted to casting covered by a single main group, e.g. for safety reasons
CPC
B22C 9/088
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
CFOUNDRY MOULDING
9Moulds or cores
08Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
088Feeder heads
B22D 46/00
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
46Controlling, supervising, not restricted to casting covered by a single main group, e.g. for safety reasons
G06F 17/00
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
FELECTRIC DIGITAL DATA PROCESSING
17Digital computing or data processing equipment or methods, specially adapted for specific functions
Applicants KIMURA CHUZOSHO CO LTD
QUALICA INC
EKK JAPAN INC
Inventors KANNO TOSHITAKE
KANG ILGOO
MURAKAMI TOSHIHIKO
KUBO KIMIO
Designated States
Title
(DE) VERFAHREN ZUM VORHERSAGEN UND VERHINDERN VON SCHRUMPFUNGSLUNKERN VON EISENGUSSTEILEN
(EN) METHOD FOR PREDICTING AND PREVENTING SHRINKAGE CAVITY OF IRON CASTING
(FR) PROCEDE PERMETTANT DE PREVOIR ET D'EMPECHER LA FORMATION D'UNE RETASSURE DANS UN MOULAGE DE FONTE
Abstract
(EN) A method for predicting and preventing occurrence of shrinkage cavity in an iron casting of any of various shapes or in each part of an iron casting precisely prior to casting. The shape of an iron casting is approximated entirely or partially to a rectangular parallelepiped or a cube, to the sum of the two long sides is divided by the short side to determine a shape coefficient, and occurrence of shrinkage cavity is predicted by determining whether the value exceeds a predetermined value (determination coefficient) or not.
(FR) La présente invention concerne un procédé permettant de prévoir avec précision et d'empêcher la formation d'une retassure dans un moulage en fonte ayant des formes diverses ou dans chaque partie d'un moulage en fonte avant le moulage. Selon ce procédé, on approche la forme du moulage en fonte entièrement ou partiellement de celle d'un parallélépipède rectangulaire ou d'un cube, dont la somme des deux côtés longs est divisée par le côté court pour permettre de déterminer un coefficient de forme et on prédit la formation d'une retassure en jugeant si la valeur obtenue excède ou non une valeur prédéterminée (coefficient de jugement).