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US 7,758,801 B2Granted
Process and extrusion blow-moulding machine for producing plastic containers
AssigneeAlpla Werke Alwin Lehner GmbH & Co. KG
InventorJohann Künz
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AssigneeAlpla Werke Alwin Lehner GmbH & Co. KG
InventorJohann Künz
Estimating the term…
Process for producing plastic containers, including an extrusion blow molding machine, is disclosed. For example, in an extrusion blow molding process for plastic bottles, in which plastic tubing (T) which has been extruded from an extruder head in a definable cycle is placed in the mold cavity of a blow molding tool arrangement, the inserted plastic tubing is inflated via an infeed blow mandrel by overpressure according to the mold cavity and is then removed from the mold. The extruded plastic tubing (T) is inserted into a mold cavity which is composed of several blow mold cavities which are located axially under one another, two of the blow mold cavities at a time being arranged mirror-symmetrically to one another and connected on their mouth regions and an individual blow mold cavity being separated from the bottom section of the adjacent blow mold cavity by a land region and having a mouth on the outer surface of the blow molding tool arrangement. There is a number of guided blow mandrels corresponding to the number of pairs of blow mold cavities located mirror symmetrically to one another. The containers (B) which have been inflated according to the blow mold cavities are removed from the mold.
Process for producing plastic containers, in an extrusion blow molding process, in which plastic tubing (T) which has been extruded from an extruder head in a definable cycle is placed in the mold cavity of a blow molding tool arrangement, the inserted plastic tubing is inflated via an infeed blow mandrel by overpressure according to the mold cavity and is then removed from the mold, wherein
Extrusion blow molding machine for producing plastic containers, with an extruder head which is located in an equipment frame with an extrusion nozzle, a blow molding tool arrangement with a mold cavity, and with at least one blow mandrel, wherein the mold cavity has several blow mold cavities at least two of the blow mold cavities at a time being located axially under one another and being arranged mirror-symmetrically to one another and being connected on their mouth regions, and an individual blow mold cavity being separated by a land region from the bottom section of the adjacent blow mold cavity and having a mouth on the outer surface of the blow molding tool arrangement, there being a number of guided blow mandrels which corresponds to the number of pairs of blow mold cavities arranged mirror-symmetrically to one another and the guided blow mandrels being laterally movable in holes of the blow mold arrangement and each being insertable into the two connected blow mold cavities in the area of the mutually bordering mouths in order to inflate the sections of the extruded plastic tubing (T) which have been inserted there according to the blow mold cavities and there being another, free blow mandrel which can be inserted axially into the mouth of the individual blow mold cavity in order to inflate the section of the plastic tubing (T) located there.
Dependencies are inferred from the claim text.