Abstract: In a wear plate (16) with a number of air-escape nozzles, in the example shown consisting of annular gaps (27) formed between bores (17) in the wear plate (16) and nozzle members (21) screwed into the bores (17) to make the mold-chamber faces (26) on the nozzle members (21) align with the mold-chamber surface (20) on the wear plate (16) in order to avoid problems when a finished mold or mold part is moved slidingly along the mold-chamber surface (20), the novel feature consists in that the nozzle members (21) have been screwed tight against an abutment tool (23) held temporarily in close abutment (not with a small gap as shown) against the mold-chamber surface on the wear plate (16), after which the nozzle members (21) have been secured in the position of alignment achieved in a suitable manner, such as by using a settable cement (30) filling the spaces between the thread (18) in the bores (17) and the thread (22 ) on the nozzle members (21) and keeping flanks (31) on the nozzle-member thread (22) in engageme