A press machine is provided with a bottom dead center position correction control section, a selected lower bottom dead center position setting section, and a bottom dead center position switching section. The bottom dead center position correction control section is configured to perform, based on the selected bottom dead center position after the switching and the detected bottom dead center position, positional correction so that the actual bottom dead center position of the slide is adjusted to the selected bottom dead center position.

This bonded and stacked core manufacturing method is for manufacturing a bonded and stacked core by performing press working on a strip-shaped steel sheet with a press working oil applied to one surface or both surfaces thereof, applying an adhesive to one surface of the strip-shaped steel sheet to obtain a plurality of steel sheet components, and stacking and bonding the steel sheet components, in which a curing accelerator having an average viscosity of 0.01 Pa.Math.s to 100 Pa.Math.s is applied to one surface or both surfaces of the strip-shaped steel sheet before the press working oil is applied.

Provided is an electrode notching mold for a secondary battery having an auto-balance unit. The electrode notching mold for the secondary battery having the auto-balance unit includes a cover portion including an upper plate and a lower plate, a mold portion having a film, a plurality of ascending-descending portions, a plurality of guide portions, and a pressing portion, and also, a plurality of auto-balance units connected to a spherical bearing on the central axis is coupled to an upper body and a lower body and performs a function of alleviating vibration.