Patents Assigned to WEFA Werkzeugfabrik Singen GmbH
  • Extrusion tool, process for the production thereof and use thereof
    Patent number: 6370934
    Abstract: In an extrusion tool—in particular a disk-shaped pressing die with at least one shaping opening for the extrusion of metal such as aluminum or an aluminum alloy—comprising a steel material—in particular a low-distortion hot-working steel—with a surface coating, the coating on the extrusion tool is made from coating material which is selected from the group containing carbides, nitrides, oxides and combinations of those substances, wherein the coating material is applied to the extrusion tool by a CVD-process.
    Type: Grant
    Filed: November 13, 2000
    Date of Patent: April 16, 2002
    Assignee: WEFA Werkzeugfabrik Singen GmbH
    Inventor: Bruno Maier
  • Process for manufacturing an extrusion tool using a CVD process
    Patent number: 6176153
    Abstract: In an extrusion tool—in particular a disk-shaped pressing die with at least one shaping opening for the extrusion of metal such as aluminum or an aluminum alloy—comprising a steel material—in particular a low-distortion hot-working steel—with a surface coating, the coating on the extrusion tool is made from coating material which is selected from the group containing carbides, nitrides, oxides and combinations of those substances, wherein the coating material is applied to the extrusion tool by a CVD-process.
    Type: Grant
    Filed: November 24, 1998
    Date of Patent: January 23, 2001
    Assignee: WEFA Werkzeugfabrik Singen GmbH
    Inventor: Bruno Maier