SPIRAL FORMING APPARATUS Russian patent published in 2005 - IPC

FIELD: equipment for winding spirals, possibly for spring mats, soft furniture.

SUBSTANCE: apparatus includes cylindrical mandrel mounted by cantilever fashion, mechanism for limiting outer diameter of spiral and for crosswise moving spiral relative to lengthwise axis of mandrel. Said mechanism includes limiting sleeve with inner diameter equal to outer diameter of mandrel. Sleeve is mounted coaxially relative to mandrel with possibility of free rotation relative to its axis. Housing of said mechanism has two protrusions for limiting horizontal motion of sleeve; mandrel is fixed in one of said protrusions. Other protrusion is arranged at side of outer part of mandrel. The last has in its outer cylindrical surface groove of separate portions. One portion of groove is provided with cone flare and it is arranged on cylindrical surface of inlet part (according to wire motion direction) of mandrel. Other portion of said groove is arranged in outlet end of mandrel and it is in the form of helical spiral having 1/3 - 2 turns. Third connection portion of groove is intermediate between two said portions. Depth of groove is equal to diameter of wire used for winding spiral.

EFFECT: simplified design, assembling, adjustment, enhanced operational reliability of apparatus.

3 cl, 5 dwg