| 摘要 |
Making a double-screw extruder housing comprises providing a hardening material in a solid cross section of a body (1) to form an axial segment of the housing, providing respective screw-receiving bores (2), and applying hardening layers where hardening material fills the auxiliary bores. Making a double-screw extruder housing comprises: (1) providing in a solid cross section of a body adapted ultimately to form an axial segment of the housing and at segments corresponding to radially thicker portions of hardened material in the housing, respective axial auxiliary bores; (2) providing in the body respective screw-receiving bores each intersecting respective of the auxiliary bores; and (3) applying to the body at regions of the screw-receiving bores hardening layers where hardening material fills the auxiliary bores to provide radially thicker portions of hardened material at the auxiliary bores. An independent claim is also included for a double-screw extruder housing or housing segment having a body with overlapping screw-receiving bores having hardened regions formed over at least arc segments of the bores and provided as hardening layers diffusion bonded to the body. |
