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1. WO1981001972 - MANUFACTURE OF DIES FOR PRESSURE CASTING

Publication Number WO/1981/001972
Publication Date 23.07.1981
International Application No. PCT/GB1980/000004
International Filing Date 07.01.1980
IPC
B22D 17/22 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
17Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
20Accessories; Details
22Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
B29C 45/00 2006.01
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
45Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
CPC
B22D 17/22
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
17Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
20Accessories: Details
22Dies
B29C 45/00
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
45Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
B29K 2905/08
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
KINDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR ; MOULDS, ; REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
2905Use of metals, their alloys or their compounds, as mould material
08Transition metals
Applicants
Inventors
Priority Data
GB80/0000407.01.1980WO
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) MANUFACTURE OF DIES FOR PRESSURE CASTING
(FR) FABRICATION DE MATRICES POUR COULEE SOUS PRESSION
Abstract
(EN)
The problem of leakage of fluid material from the mould cavity (36) in a pressure forming process between the faces of separate die-parts (29 and 31) is conventionally overcome by careful machining of the die parts. The invention provides a cheaper solution in which separable die parts are formed by casting a metallic slurry against a pattern (11) of the article to be pressure formed. Preferably a second cast die-part (31) is cast against a previously formed, first die part (29).
(FR)
Le probleme des fuites d"un materiau fluide d"une cavite d"un moule (36) dans un procede de formage sous pression entre les faces des parties separees d"une matrice (29 et 31) est resolu generalement par un usinage soigne des pieces de la matrice. L"invention offre une solution plus economique ou des pieces separables de la matrice sont formees en coulant une boue metallique contre un modele (11) de l"article a former sous pression. De preference, une seconde piece de matrice coulee (31) est coulee contre une premiere piece de matrice formee anterieurement.
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