Method for producing a plastic foil tube and a related plastic foil tube

A method for producing a plastic foil tube with an intended cross-section, comprising:

• mounting a semi-finished tube on a core tool such that the core tool is arranged within the semi-finished tube;
• charging the mounted semi-finished tube with a predetermined force by applying said force to the semi-finished tube in a direction transverse to a longitudinal direction of the semi-finished tube to press the semi-finished tube into at least one recess of a core cross-section of the core tool within the semi-finished tube, whereby one or more elongate folds are formed in the semi-finished tube, each of which folds extends in said longitudinal direction;
• heating the semi-finished tube to a predetermined forming temperature for a predetermined time period for the production of the plastic foil tube with the intended cross-section;
• and
• stripping the plastic foil tube formed in this a manner off the core tool after the plastic foil tube has cooled.

A method for producing a thin-walled plastic tube having an intended cross-section, comprising:

• mounting a semi-finished tube on a core tool;
• applying a predetermined force to the mounted semi-finished tube to press the semi-finished tube into at least one recess of a core cross-section of the core tool within the semi-finished tube thereby to form one or more elongate folds in the semi-finished tube, each of said one or more elongate folds extending in a longitudinal direction of the semi-finished tube;
• heating the semi-finished tube to a predetermined forming temperature for a predetermined time period for the production of the thin-walled plastic tube with the intended cross-section;
• and
• cooling the thin-walled plastic tube formed in this manner and removing the thin-walled plastic tube from the core tool.