公开(公告)号：SG136863A1

公开(公告)日：2007-11-29

申请号：SG2007019656

申请日：2007-03-16

Applicant: UNITED TECHNOLOGIES CORP

Inventor： BOCHIECHIO MARIO P ,  BULLIED STEVEN J ,  KENNARD LEA D ,  VERNER CARL R ,  JOHN J MARCIN JR

Abstract: In an investment casting process, a composite core is formed as a combination of ceramic casting core element and a non-ceramic casting core element. The core is heated in an oxidative atmosphere and then heated in a non-oxidative atmosphere.

公开(公告)号：SG131010A1

公开(公告)日：2007-04-26

申请号：SG2006053284

申请日：2006-08-07

Applicant: UNITED TECHNOLOGIES CORP

Inventor： TURKINGTON MICHAEL K ,  BULLIED STEVEN J ,  JOHN J MARCIN JR ,  KENNARD LEA D ,  VERNER CARL R

Abstract: A pattern with internal cores for creating a hollow component is composed of a first pattern half having one or more first self- locating features; a second pattern half having one or more second self-locating features; and one or more cores disposed in contact with the one or more first self- locating features and the one or more second self-locating features. The method for its manufacture includes the steps of creating a first pattern half having one or more first self-locating features; creating a second pattern half having one or more second self- locating features; providing one or more cores; and assembling the pattern by engaging the one or more first self-locating features and the one or more second self- locating features about the one or more cores.