Title:
押出機のスクリュー並びに押出機のスクリューを形成する方法
Document Type and Number:
Japanese Patent JP2009539653
Kind Code:
A
Abstract:
At least one section of the screw (11) has a wear-protection layer (13) and at least one other section of the screw preferably has an anti-friction layer (18). In a solid rod (11'), abed (12) for the wear-protection layer (13) is first formed, and in this the wear-protection layer (13) is then applied, and finally the interstices (14) between the screw flights (15) are formed. According to the invention, the wear-protection layer (13), for example composed of tungsten carbide, is applied by build-up welding, and the interstices (14) are formed with lateral separation (16, 16') with respect to the wear-protection layer (13). For production of the anti-friction layer, the dimension of that/those section(s) of the screw (11) where the anti-friction layer, e.g. composed of molybdenum, is to be applied is reduced below specification, while providing lateral separation (19) with respect to the wear-protection layer. The anti-friction layer is then applied in the under-dimensioned region (17). Finally, the screw (11) is brought to the specified dimension.
Inventors:
Schnable, Elvin
Application Number:
JP2009514757A
Publication Date:
November 19, 2009
Filing Date:
June 06, 2007
Export Citation:
Assignee:
Thayson Extrude Stehnik Gesellschaft M. B. Her.
International Classes:
B23P13/00; B29C48/395; B29C48/59; B30B11/24
Attorney, Agent or Firm:
Takehiko Suzue
Kurata Masatoshi
Satoshi Kono
Makoto Nakamura
Yoshihiro Fukuhara
Takashi Mine
Toshio Shirane
Sadao Muramatsu
Nobuhisa Nogawa
Katsu Sunagawa
Tetsuya Kazama
Kurata Masatoshi
Satoshi Kono
Makoto Nakamura
Yoshihiro Fukuhara
Takashi Mine
Toshio Shirane
Sadao Muramatsu
Nobuhisa Nogawa
Katsu Sunagawa
Tetsuya Kazama