The ornamental design for a housing for weldingextruder, as shown and described.
FIG. 1 is a perspective view of a housing for welding extruder showing our new design as seen from the upper left hand side.
FIG. 2 is a right side elevation view of FIG. 1.
FIG. 3 is a rear end elevation view of FIG. 1; and,
FIG. 4 is a bottom plan view of FIG. 1.
The broken line showings of other portions of a welding extruder in FIGS. 1–4 are for illustrative purposes only and form no part of the claimed design.