METHOD OF MANUFACTURING COLLECTORS OF ELECTRIC MACHINES AND PRESS MOLD FOR MANUFACTURING Russian patent published in 1995 - IPC

FIELD: electric engineering. SUBSTANCE: work piece for collector with fastening elements is pressed in press mold matrix and pressed again in press mold by its elastic members. Elastic members during initial pressing are strained and fixed in loaded position. Later on, work piece for collector in press mold is heated at given temperature. During heating work piece is additionally pressed by strain force in elastic members of press mold. Before pressing, ring blanks, which are made from plastic material with long-staple filler oriented around circumstance, are applied to ends of collector work piece. Ratio of inner and outer diameters of said ring blanks is determined. Press mold for manufacturing said type of collectors has locking member and pressing members having centering punch and closing punch with pressure gauge. Centering punch has base and rod. Closing punch has elastic members. Matrix of press mold is positioned between punches. EFFECT: facilitated manufacturing. 4 cl, 3 dwg