Method and device for producing containers which are filled with a liquid filling substance
AssigneeKHS GmbH
InventorsLudwig Clüsserath, Wilfried Ehmer
Life of this patent
Estimating the term…
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 mould 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).
Claims32
1-22. (canceled)
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.
A device for producing containers, filled with a liquid filling substance, made of at least thermally conditioned preforms made of a thermoplastic material, the device comprising:
- at least one shaping and filling station;
- at least one liquid connection for a controlled supply of the filling substance shaping the containers and filled into them from at least one filling substance tank containing the filling substance at shaping and filling pressure, wherein the shaping and filling station has a stretching rod for at least temporary guiding and stretching of a particular preform during a shaping and filling phase, wherein the liquid connection is formed at least partially by a channel in the stretching rod, and wherein the shaping and filling station has an annular contact surface, wherein the preform and the container shaped from the preform lie tight against said surface at least during the shaping and filling phase;
- and at least one controlled gas path that opens by at least one return gas channel enclosing the stretching rod in a ring shape within the annular contact surface.
Dependencies are inferred from the claim text.