公开(公告)号：US10016808B2

公开(公告)日：2018-07-10

申请号：US14768277

申请日：2014-02-04

Applicant: GRUNDFOS HOLDING A/S

Inventor： Martin Vestermark Vad

IPC: B22C9/10 ,  F04D29/22 ,  B22F3/22 ,  B22F7/06 ,  B29C33/00 ,  B29C33/76 ,  B29C45/40 ,  B29L31/08

CPC classification number: B22C9/103 ,  B22F3/225 ,  B22F7/06 ,  B29C33/0033 ,  B29C33/76 ,  B29C45/40 ,  B29K2859/00 ,  B29K2905/06 ,  B29L2031/08 ,  F04D29/2222

Abstract: A segmented core (1) for molding of an impeller (12), especially a pump impeller, includes at least three segments (2). All of the segments (2) have the same form and each segment (2) has connecting devices (3, 3′) for connecting the segment (2) with the adjacent segments (2). A method for molding an impeller (12) includes the steps of: providing a molding tool (14), providing a core (1) including at least three identical segments (2), which include the connection portions (3, 3′) for connecting the segment (2) with the adjacent segments (2); assembling of the core (1); placing the core (1) in the molding tool (14); molding the impeller (12), ejecting the core (1) and the impeller (12) out of the molding tool (14); and removing the core (1) from the impeller (12).

公开(公告)号：US10256679B2

公开(公告)日：2019-04-09

申请号：US14436271

申请日：2013-10-21

Applicant: GRUNDFOS HOLDING A/S

Inventor： Martin Vestermark Vad

IPC: H02K1/27 ,  H02K15/02 ,  H02K1/02 ,  H02K15/03

Abstract: The rotor for an electric motor includes a central rotor shaft (2) and a permanent-magnetic rotor body fastened on the rotor shaft. The rotor body is provided with a casing (8) which is radially distanced to the rotor shaft (2). A first annular space, which is adjacent the casing (8) and which is molded out with a plastic (10) at least partly containing magnet particles, is formed between the rotor shaft (2) and the casing (8).