METHOD FOR OPERATING SPINNING APPARATUS, AND SPINNING APPARATUS

摘要

Disclosed is a spinning apparatus wherein a control means (3) is arranged for controlling respective operation of a horizontal feed mechanism (Rz) and a vertical feed mechanism (Rx), based on operation state of a roller shift operation tool (35). The spinning apparatus is provided with an upper pressure limit setting means (L) which variably sets the upper pressure limit of a drive fluid supplied to the vertical feed mechanism (Rx). Spinning process is performed to a material to be processed by setting an upper pressure limit for rapid expansion shift to be lower than a reference upper pressure limit by means of the upper pressure limit setting means (L). The upper pressure limit for rapid expansion shift is applied when a roller travel distance in a direction vertical to the rotating axis center of a molding die during a period when the roller travels a set distance in the direction parallel to the rotating axis center of the molding die is more than a reference travel distance. The reference upper pressure limit is applied for normal shift wherein the roller travel distance in the vertical direction is a normal travel distance or less during a time when the roller shifts in the parallel direction by the set travel distance.