发明授权
- 专利标题： Tool making
- 专利标题（中）： 制作工具
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申请号： US988681申请日： 1992-12-10
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公开(公告)号： US5345052A公开(公告)日： 1994-09-06
- 发明人: Kevin J. Puddephatt
- 申请人： Kevin J. Puddephatt
- 申请人地址： GBX Tyne & Wear
- 专利权人： Nissan European Technology Centre Limited
- 当前专利权人： Nissan European Technology Centre Limited
- 当前专利权人地址： GBX Tyne & Wear
- 优先权： GBX9126457.2 19911212; GBX9126458.0 19911212
- 主分类号： B22C7/02
- IPC分类号： B22C7/02 ; B22C9/04 ; B23H1/00 ; B23H9/00 ; B29C33/38 ; B23H9/12
摘要：
A trial tool for injection moulding is made by subjecting a cast Zn alloy tool blank to rapid EDM, using a first electrode and a relatively large EDM gap, to produce a coarse surface closely approximating to the required shape, and then subjecting the coarse tool to slow EDM, using a second electrode and a smaller EDM gap, to produce a trial tool having an operative surface of the required shape. A production tool is then made by subjecting a cast steel tool blank to rapid EDM, using the second electrode, and then subjecting the coarse production tool to slow EDM, using a third electrode.
公开/授权文献
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