Method and device for producing containers which are filled with a liquid filling substance
AssigneeKHS GmbH
InventorsLudwig Clüsserath, Wilfried Ehmer
Life of this patent
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Abstract
Method for producing tilled containers from parisons made from a thermoplastic material, wherein the respective parison is at least conditioned thermally and is subsequently shaped during a shaping and filling phase in a mold by the action of the pressure of the supplied filling substance into the respective container at a shaping and filling pressure, wherein, during the shaping and filling phase, the parison is guided at least temporarily through a stretching rod and/or is stretched in the axial direction, and wherein, at least at the end of the shaping and tilling phase, the respective container has an internal pressure which corresponds to the shaping and filling pressure (p2).
Claims23
A method for producing filled containers from preforms made of a thermoplastic material, the method comprising the steps of:
- at least thermally conditioning a preform;
- reshaping the preform during a shaping and filling phase in a mold under pressure of a supplied filling substance to form a particular container under a shaping and filling pressure, whereby the preform during the shaping and filling phase at least for a time is fed through a stretching rod and/or stretched in an axial direction, and whereby at least at an end of the shaping and filling phase, the particular container has an internal pressure matching the shaping and filling pressure;
- and depressurizing the shaped and filled container to atmospheric or ambient pressure after the end of the shaping and filling phase in an at least two-stage depressurization phase, wherein a duration of the at least two-stage depressurization phase of the particular containers from the shaping and filling pressure to the ambient pressure is controlled depending on a temperature of the filling substance, whereby the duration of the depressurization and/or the duration of at least one partial phase of the depressurization increases with a rising temperature of the filling substance.
Dependencies are inferred from the claim text.