APPARATUS FOR CURLING EDGES OF HOLLOW PARTS Russian patent published in 1997 - IPC

FIELD: plastic material working, namely, apparatus for curling edges of hollow parts, possibly at making bodies of metallic barrels with removable upper bottom for storing and transporting food, combustible lubricant and loose materials. SUBSTANCE: apparatus is provided with supporting counter-roller whose axis is arranged normal relative to axes of pressure deforming rollers mounted symmetrically on surface plate that may move axially. Said supporting counter-roller is secured by means of hinged Г-shaped lever on surface plate provided with adjustable rest. Profiling grooves of pressure deforming rollers and supporting counter-roller at mutually joining copy final shape of scroll to be made at curling. Centering larger bead of pressure deforming rollers whose height is equal to diameter of scroll has starting angle inversely proportional to diameter of inner cavity of deformed part. Bead of counter-roller has supporting area whose width is equal to diameter of scroll and spaced from lateral surface at side of profiling groove of larger bead by distance equal to thickness of material of deformed hollow part. Such apparatus may be used for curling edges of metallic barrels with volume up to 200 cu.dm at side of their removable upper bottom tightened by hoop. EFFECT: enhanced quality of curled edges of hollow thin-wall cylindrical parts, lowered labor consumption at making metallic barrels. 4 dwg