Device for the production of plastic containers by stretch blow forming using an explosive blowing medium

Claim 1

Device for manufacturing container ( 1 , 1 ′) from a plastics material which can be formed by stretch-blowing with a mould, the internal space of which corresponds to the finished container ( 1 ), which is held by its open end ( 7 ) by a receiving portion ( 4 ), wherein lines ( 9 , 10 ) connected to a metering unit are provided on the receiving portion ( 4 ), a moveable stretching die ( 11 ) is guided axially through the receiving portion ( 4 ) and an ignition means ( 12 ) is arranged in order to ignite an explosive gas mixture inside the container ( 1 ′), and wherein heating and cooling means are provided, characterised in that the receiving portion ( 4 ), at its end opposite the container ( 1 ) can be engaged in a flowable medium-tight manner with a distributor module ( 14 ), through which the stretching die ( 11 ) is moveably passed axially extending the receiving portion ( 4 ), and on which at least one connector for flowable media ( 9 , 10 , 21 ) is fitted, in that the at least one connector for flowable media ( 9 , 10 , 21 ) can be closed off in order to seal the device-side interior space ( 22 ), and in that the ignition means ( 12 ) is fitted in the device-side interior space ( 22 ).

Claim 3

A device for forming a deformable plastic material blank ( 2 ), having an open end ( 7 ), into a mold having an internal space shaped to correspond to a desired shape of a container ( 1 ); said device comprising: a receiving portion ( 4 ) for holding and sealing to said open end ( 7 ), said receiving portion having a receiving portion axial channel for accommodating a movable stretching die ( 11 ); a distributor module ( 14 ) having a module axial channel for accommodating a movable stretching die ( 11 ), said distributor module ( 14 ) engaging the receiving portion ( 4 ) in a fluid tight seal so that the receiving portion axial channel and module axial channel are axially aligned and so that the distributor module and receiving portion together have a device-side interior space ( 22 ), said distributor module further having at least one connector for at least one fluid line to connect the fluid line to the device-side interior space; a movable stretching die ( 11 ) arranged to be guided axially through the receiving portion axial channel and the module axial channel; a metering unit; at least one tubular line connected between the metering unit and said at least one connector of the distributor module, said tubular line being closable to seal the device-side interior space; a heating means for heating the blank ( 2 ) to render it readily deformable; an ignitor ( 12 ) positioned within the device-side interior space for igniting an explosive gas mixture within the blank ( 2 ); and a cooling means for cooling the finished container.

Claim 4

A device for forming a deformable plastic material blank ( 2 ), having an open end ( 7 ), into a mold having an internal space shaped to correspond to a desired shape of a container ( 1 ); said device comprising: a receiving portion ( 4 ) for holding and sealing to said open end ( 7 ), said receiving portion having a receiving portion axial channel for accommodating a movable stretching die ( 11 ); a distributor module ( 14 ) having a module axial channel for accommodating a movable stretching die ( 11 ), said distributor module ( 14 ) engaging the receiving portion ( 4 ) in a fluid tight seal so that the receiving portion axial channel and module axial channel are axially aligned and so that the distributor module and receiving portion together have a device-side interior space ( 22 ), said distributor module further having at least one connector for at least one fluid line to connect the fluid line to the device-side interior space; a movable stretching die ( 11 ) arranged to be guided axially through the receiving portion axial channel and the module axial channel; a metering unit; at least one tubular line connected between the metering unit and said at least one connector of the distributor module, said tubular line being closable to seal the device-side interior space; a heating means for heating the blank ( 2 ) to render it readily deformable; an ignitor ( 12 ) positioned within the device-side interior space for igniting an explosive gas mixture within the blank ( 2 ); and a cooling means for cooling the finished container.

Claim 8

A device for forming a deformable plastic material blank ( 2 ), having an open end ( 7 ), into a mold having an internal space shaped to correspond to a desired shape of a container ( 1 ); said device comprising: a receiving portion ( 4 ) for holding and sealing to said open end ( 7 ), said receiving portion having a receiving portion axial channel for accommodating a movable stretching die ( 11 ); a distributor module ( 14 ) having a module axial channel for accommodating a movable stretching die ( 11 ), said distributor module ( 14 ) engaging the receiving portion ( 4 ) in a fluid tight seal so that the receiving portion axial channel and module axial channel are axially aligned and so that the distributor module and receiving portion together have a device-side interior space ( 22 ), said distributor module further having at least one connector for at least one fluid line to connect the fluid line to the device-side interior space; a movable stretching die ( 11 ) arranged to be guided axially through the receiving portion axial channel and the module axial channel; a metering unit; at least one tubular line connected between the metering unit and said at least one connector of the distributor module, said tubular line being closable to seal the device-side interior space; a heating means for heating the blank ( 2 ) to render it readily deformable; an ignitor ( 12 ) positioned within the device-side interior space for igniting an explosive gas mixture within the blank ( 2 ); and a cooling means for cooling the finished container, wherein the stretching die ( 11 ) is hollow and has at least one outlet aperture ( 20 ) arranged on a stretching die tip, at least one fluid inlet ( 21 ) and at least one internal channel ( 39 ) connecting aperture ( 20 ) and inlet ( 21 ); and wherein a check valve ( 23 ) is located within stretching die ( 11 ) proximate outlet aperture ( 20 ).

Claim 9

A device for forming a deformable plastic material blank ( 2 ), having an open end ( 7 ), into a mold having an internal space shaped to correspond to a desired shape of a container ( 1 ); said device comprising: a receiving portion ( 4 ) for holding and sealing to said open end ( 7 ), said receiving portion having a receiving portion axial channel for accommodating a movable stretching die ( 11 ); a distributor module ( 14 ) having a module axial channel for accommodating a movable stretching die ( 11 ), said distributor module ( 14 ) engaging the receiving portion ( 4 ) in a fluid tight seal so that the receiving portion axial channel and module axial channel are axially aligned and so that the distributor module and receiving portion together have a device-side interior space ( 22 ), said distributor module further having at least one connector for at least one fluid line to connect the fluid line to the device-side interior space; a movable stretching die ( 11 ) arranged to be guided axially through the receiving portion axial channel and the module axial channel; a metering unit; at least one tubular line connected between the metering unit and said at least one connector of the distributor module, said tubular line being closable to seal the device-side interior space; a heating means for heating the blank ( 2 ) to render it readily deformable; an ignitor ( 12 ) positioned within the device-side interior space for igniting an explosive gas mixture within the blank ( 2 ); and a cooling means for cooling the finished container, wherein the stretching die ( 11 ) is hollow and has at least one outlet aperture ( 20 ) arranged on a stretching die tip, at least one fluid inlet ( 21 ) and at least one internal channel ( 39 ) connecting aperture ( 20 ) and inlet ( 21 ); and wherein a check valve ( 23 ) is located within stretching die ( 11 ) proximate outlet aperture ( 20 ).

Claim 18

A device for forming a deformable plastic material blank ( 2 ), having an open end ( 7 ), into a mold having an internal space shaped to correspond to a desired shape of a container ( 1 ); said device comprising: a receiving portion ( 4 ) for holding and sealing to said open end ( 7 ), said receiving portion having a receiving portion axial channel for accommodating a movable stretching die ( 11 ); a distributor module ( 14 ) having a module axial channel for accommodating a movable stretching die ( 11 ), said distributor module ( 14 ) engaging the receiving portion ( 4 ) in a fluid tight seal so that the receiving portion axial channel and module axial channel are axially aligned and so that the distributor module and receiving portion together have a device-side interior space ( 22 ), said distributor module further having at least one connector for at least one fluid line to connect the fluid line to the device-side interior space; a movable stretching die ( 11 ) arranged to be guided axially through the receiving portion axial channel and the module axial channel; a metering unit; at least one tubular line connected between the metering unit and said at least one connector of the distributor module, said tubular line being closable to seal the device-side interior space; a heating means for heating the blank ( 2 ) to render it readily deformable; an ignitor ( 12 ) positioned within the device-side interior space for igniting an explosive gas mixture within the blank ( 2 ); and a cooling means for cooling the finished container wherein a hollow piston ( 17 ) is provided with an annular seat ( 47 , 48 ) on an end facing the receiving portion ( 4 ), and the stretching die ( 11 ) carries a radially widened portion ( 46 ) perpendicular to its longitudinal axis ( 13 ) on an end movable into the container to be manufactured for engagement with the sealing seat.

Claim 19

A device for forming a deformable plastic material blank ( 2 ), having an open end ( 7 ), into a mold having an internal space shaped to correspond to a desired shape of a container ( 1 ); said device comprising: a receiving portion ( 4 ) for holding and sealing to said open end ( 7 ), said receiving portion having a receiving portion axial channel for accommodating a movable stretching die ( 11 ); a distributor module ( 14 ) having a module axial channel for accommodating a movable stretching die ( 11 ), said distributor module ( 14 ) engaging the receiving portion ( 4 ) in a fluid tight seal so that the receiving portion axial channel and module axial channel are axially aligned and so that the distributor module and receiving portion together have a device-side interior space ( 22 ), said distributor module further having at least one connector for at least one fluid line to connect the fluid line to the device-side interior space; a movable stretching die ( 11 ) arranged to be guided axially through the receiving portion axial channel and the module axial channel; a metering unit; at least one tubular line connected between the metering unit and said at least one connector of the distributor module, said tubular line being closable to seal the device-side interior space; a heating means for heating the blank ( 2 ) to render it readily deformable; an ignitor ( 12 ) positioned within the device-side interior space for igniting an explosive gas mixture within the blank ( 2 ); and a cooling means for cooling the finished container wherein a hollow piston ( 17 ) is provided with an annular seat ( 47 , 48 ) on an end facing the receiving portion ( 4 ), and the stretching die ( 11 ) carries a radially widened portion ( 46 ) perpendicular to its longitudinal axis ( 13 ) on an end movable into the container to be manufactured for engagement with the sealing seat.