METHOD OF PRODUCING VENTILATOR GRILLS

摘要

A method of producing a ventilator grill (A) comprising a grill frame (B) and louver vanes (E) pivotally mounted thereon utilizes first, second and third mould halves. After the first and second mould halves have been used in a first position to make the grill frame (B) formed of a first plastics material and having axle holes (C) and recesses (D) formed therein by cores, the first mould half and the cores are removed from the second mould half and from the grill frame (B) retained thereon and then the second mould half with the grill frame (B) thereon is moved to a second position to which the third mould half is moved into close contacting relationship to the second mould half and the grill frame (B) to cooperate with them to define a vane moulding cavity into which a second plastics material is injected to form the louver vanes (E) having integral axles (F) and disc-like friction portions (G) formed by the second plastics material solidified in the axle holes (C) and the recesses (D) in the grill frame (B).