Patent ID: 6604383
Filing Date: 2003-08-12
Classification: C03B,G05B,Y02P,Y10S

Abstract:
A control for use with a glass forming machine which includes a blank station for forming a parison from a gob of molten glass having a number of mechanisms, a blow station for forming a parison into a bottle having a number of mechanisms, a feeder system including a shear mechanism for shearing a gob from a runner of molten glass so that it can be delivered to the blank station, a mechanism for transferring a parison from the blank station to the blow station and a takeout mechanism for removing a bottle from the blank station,wherein the machine has a set cycle time, wherein each of the mechanisms is cycled within the time of one machine cycle, wherein each displacement of each of the mechanisms has a determinable duration, wherein interferences exist between the motion paths of the gob, the parison, the bottle and individual mechanisms, wherein at least one displacement of at least one of the mechanisms is divided up into at least two submotions which locates an interference with the gob, the parison, the bottle or another mechanism, wherein process air is supplied for at least one process for a finite duration by turning a supply valve â€œonâ€  and then â€œoffâ€  during the time of one machine cycle, wherein the start of a displacement and the turning of a supply valve â€œonâ€  and then â€œoffâ€  are controlled events which are started in a selected sequence, and wherein an unwrapped bottle forming process wherein a gob of molten glass is formed from a runner of molten glass, the gob is then formed into a parison in the blank station, the parison is then formed into a bottle in the blow station, and the bottle is then removed from the blow station, takes more than one machine cycle to complete, comprising a computerized model of a mathematical representation of a network constraint diagram of the unwrapped bottle forming process for determining whether, with the following inputs: 1. the time in an unwrapped bottle forming process for each displacement to occur; 2. the machine cycle time; 3. the motion durations of each of the mechanisms, and 4. the submotion durations, a collision will result between the gob, the parison, the bottle or any other mechanism.