发明名称 |
Extruder for extrusion manufacturing |
摘要 |
An apparatus for manufacturing a rod of hard metal or ceramic with at least one helical inner bore. A plasticized mass of hard metal or ceramic is simultaneously forced through a die and twisted. Either the mass is twisted uniformly over the cross-section of the billet by a spinner immersed in the mass or the spinner is rotated by the mass. The mass emerges either subject to torsion or entirely or mostly without torsion from a smooth downstream channel through the die. A filament-shaped material extends or is injected into the mass to produce the inner bore or bores.
|
申请公布号 |
US5904939(A) |
申请公布日期 |
1999.05.18 |
申请号 |
US19970897949 |
申请日期 |
1997.07.24 |
申请人 |
KONRAD FRIEDRICHS KG;GUEHRING OHG |
发明人 |
FRIEDRICHS, ARNO |
分类号 |
B21C23/10;B21C23/14;B21C25/00;B21C37/04;B21D17/00;B22F3/20;B22F5/00;B22F5/10;B23P15/32;B28B3/20;E21B10/60;(IPC1-7):B29C47/24;B30B11/26 |
主分类号 |
B21C23/10 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|