Title:
【発明の名称】ねじロータを製造する方法
Document Type and Number:
Japanese Patent JP2833808
Kind Code:
B2
Abstract:
The invention relates to a method of manufacturing rotors of the kind having helical lands and intermediate grooves. A rotor body (2) is moulded or formed in some other way on a shaft (1) to only a small degree of accuracy, whereafter an outer layer (3) of polymer-based material is moulded on the rotor body to a high degree of accuracy. For the purpose of eliminating shrinkage-induced distortion of the lands of the rotor body (2) subsequent to applying the outer layer, the rotor body is produced in a multiple of layers (21, 22), by casting or like moulding processes, with each of said body layers having a thickness which is greater than that of the outer layer (3).
Inventors:
TEIMUSUKA KARURISU
Application Number:
JP50422989A
Publication Date:
December 09, 1998
Filing Date:
April 04, 1989
Export Citation:
Assignee:
SUBENSUKA ROTORU MASUKINAA AB
International Classes:
F04C18/16; B29C37/00; B29C39/02; B29C70/06; B29D99/00; F01C1/08; F04C2/16; B29K105/06; B29L31/08; (IPC1-7): F04C18/16; B29C70/06; F04C2/16
Domestic Patent References:
| JP5742743A |
Other References:
【文献】米国特許2519588(US,A)
【文献】米国特許3535057(US,A)
【文献】米国特許3841805(US,A)
【文献】米国特許3535057(US,A)
【文献】米国特許3841805(US,A)
Attorney, Agent or Firm:
Shigeru Yagita (3 outside)