A CORE FOR AN INVESTMENT CASTING PROCESS

• Main Author: Mottram, Martin
• Format: Patent
• Language: English; French; German
• Published: 04.09.2019
• Subjects: BLASTING; CASTING; ENGINE PLANTS IN GENERAL; FOUNDRY MOULDING; HEATING; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES; PERFORMING OPERATIONS; POWDER METALLURGY; STEAM ENGINES; TRANSPORTING; WEAPONS

A core (400) for an investment casting process in which a component to be cast has an internal passageway, the internal passageway being provided by the core (400), the core (400) comprising: a first core passage (401) having a first point (405) and a second point (406) therein and including no straight path between the first point (405) and the second point (406); and a first core bridge (421a) which extends away from the first core passage (401) between the first and second points (405, 406), wherein the first core bridge (421a) comprises a first pillar (422) and a second pillar (412a) which connect to the first and second points (405, 406) respectively, and a bridge portion (423a) which extends between the first and second pillars (422, 412a); wherein the first pillar (422) comprises a core inlet portion (408) having a thickness at the first point (405) and the second pillar (412a) has a thickness at the second point (406), the thickness of the core inlet portion (408) at the first point (405) being less than the thickness of the second pillar (412a) at the second point (406).