The ornamental design for a welding apparatus for thermoplasticmaterial, as shown and described.
FIG. 1 is a top perspective view of the design of a welding apparatus for thermoplastic material showing a first embodiment of the new design;
FIG. 2 is a front elevation view of the welding apparatus for thermoplastic material shown in FIG. 1;
FIG. 3 is a right side elevation view of the welding apparatus for thermoplastic material shown in FIG. 1 (the left side elevation view of the welding apparatus for thermoplastic material is a mirror image of the view shown in FIG. 3);
FIG. 4 is a rear elevation view of the welding apparatus for thermoplastic material shown in FIG. 1;
FIG. 5 is a top plan view of the welding apparatus for thermoplastic material shown in FIG. 1; and,
FIG. 6 is a bottom plan view of the welding apparatus for thermoplastic material shown in FIG. 1.