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1. (WO1979000298) INSULATED MANIFOLD WITH DOUBLE CAST WALLS AND METHOD OF MAKING
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1979/000298 International Application No.: PCT/US1978/000134
Publication Date: 31.05.1979 International Filing Date: 02.11.1978
IPC:
B22C 9/04 (2006.01) ,B22D 19/00 (2006.01) ,F01N 13/10 (2010.01)
B PERFORMING OPERATIONS; TRANSPORTING
22
CASTING; POWDER METALLURGY
C
FOUNDRY MOULDING
9
Moulds or cores; Moulding processes
02
Sand moulds or like moulds for shaped castings
04
Use of lost patterns
B PERFORMING OPERATIONS; TRANSPORTING
22
CASTING; POWDER METALLURGY
D
CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
19
Casting in, on, or around, objects which form part of the product
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01
MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
N
GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
13
Exhaust or silencing apparatus characterised by constructional features
08
Other arrangements or adaptations of exhaust conduits
10
of exhaust manifolds
Applicants:
Inventors:
Priority Data:
85237817.11.1977US
Title (EN) INSULATED MANIFOLD WITH DOUBLE CAST WALLS AND METHOD OF MAKING
(FR) COLLECTEUR ISOLE A DEUX PAROIS COULEES ET PROCEDE DE FABRICATION
Abstract:
(EN) A composite article (10) and method of forming the same wherein an inner casting (11) is separated from an outer casting (12) by an insulative portion (13) defining the pattern for the outer surface (14) of the inner casting (11) and the pattern for the inner surface (15) of the outer casting (12). The insulative portion (13) is captured between the castings (11, 12) to define a thermal barrier therebetween. The castings (11. 12) are formed by gasifying an expendable gasifiable pattern (16, 17) corresponding to the inner and outer castings (11, 12), respectively. The patterns (16, 17) are assembled with the insulative portion (13) of the article (10) disposed therebetween and a mold (32) is formed about the assembled patterns (16, 17) and insulative portion (13). Upon pouring of molten casting metal (27) into the mold, the expendable patterns (16, 17) are gasified into the mold, (32) permitting the inner (11) and outer (12) portions of the article (10) to be cast about the insulative portion (13) to form the desired final composite article (10).
(FR) Un produit composite (10) et sa methode de fabrication selon laquelle une paroi coulee interne (11) est separee d"une paroi coulee externe (12) par une partie isolante (13) definissant le modele de la surface exterieure (14) de la paroi coulee interne (11) et le modele de la surface interieure (15) de la paroi coulee externe (12). La partie isolante (13) est prise entre les deux parois coulees (11, 12) pour y definir une barriere thermique. Les parois coulees (11, 12) sont formees en gazeifiant un modele gazeifiable expansible (16, 17) correspondant aux parois coulees interne et externe (11, 12), respectivement. Les modeles (16, 17) sont assembles avec la partie isolante (13) du produit (10) disposee entre les deux et il se forme un moule (32) autour des modeles (16, 17) et de la partie isolante (13) assembles. Lors de la coulee du metal (27) dans le moule, les modeles expansibles (16, 17) sont gazeifies dans le moule (32) permettant aux parois interne (11) et externe (12) du produit (10) d"etre coulees autour de la partie isolante (13) pour former le produit composite final voulu (10).
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
JPS54500038