发明名称 |
Method and apparatus for manufacturing a magnetic chuck. |
摘要 |
<p>A method and apparatus are provided for manufacturing an element (1) of a magnetic chuck comprising pole parts (2) of soft magnetizable material and parts (3) of a nonmagnetizable material connected thereto. The method implies that the parts (3) of the non-magnetizable material are casted on to the pole parts (2) of soft magnetizable material. In case of the manufacture of a permanent magnetic chuck cavities (18) are saved between the pole parts (2) during casting. For this purpose the apparatus comprises a mould (10) having ribs (20) therein for forming said cavities (8), the ribs (20) also acting as spacer means for holding the pole parts (2) in a spaced apart relationship during casting. The resulting element (1) of a magnetic chuck has a strong and rigid structure and is less costly to produce than the prior art chucks.</p> |
申请公布号 |
EP0326214(A1) |
申请公布日期 |
1989.08.02 |
申请号 |
EP19890200121 |
申请日期 |
1989.01.20 |
申请人 |
WALKER-HAGOU B.V. |
发明人 |
BIJL, ROY;LUYTEN, CORNELIS THEODORUS PETRUS MARIA |
分类号 |
B23Q3/15;B22D19/00;B23Q3/154;H01F41/02 |
主分类号 |
B23Q3/15 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|