Glass forming method with individually controlled plunger end positions

Method for manufacturing formed glass parisons, comprising:

• performing a first cycle using a blank side having a plunger and a blank mould, the first cycle comprising the steps:
• i. bringing a first gob of molten glass into the blank mould by means of a glass feeding device,
• ii. moving the plunger up to an end position such that a first parison is formed from the first gob of molten glass,
• iii. measuring the end position of the plunger by means of a measuring device, and
• iv. removing the parison from the blank mould,
• performing a second cycle using the blank side, the second cycle comprising the steps:
• i. adjusting the glass feeding device in response to the measured end position of the plunger such that a size of a second gob of molten glass is set in response to the measured end position of the plunger,
• ii. bringing a second gob of molten glass with the set size into the blank mould by means of the glass feeding device,
• iii. moving the plunger up to an end position such that a second parison is formed from the second gob of molten glass, and
• iv. removing the parison from the blank mould.