a blow - molding machine for producing blow - molded hollow bodies from a thermoplastic material , includes two blow - mold halves which can be horizontally displaced and provided with separate drive units for a transport drive and for the sequence of movements of the mold closing and locking device to open and close the blow mold halves . conventional blow - molding machines are still equipped with hydraulic drives at least for the mold closing and locking device . in order to provide a blow - molding machine that can for example be operated under clean - room conditions , the drive unit of the blow - molding machine according to the invention is configured for the clamping elements of the mold closing and locking device as an electromotive direct drive with a spindle drive and a spindle mechanism with recirculating rollers .