Apparatus for tandem molding of plastic containers
AssigneeBall Corporation
InventorJorn W. Andersen
Life of this patent
Estimating the term…
Abstract
Apparatus is provided for expanding an earlier-extruded portion (42) of extruded plastic tubing (38) or plastic parison (41) into a first container (96a), for expanding a later-extruded portion (43) of the extruded plastic tubing (38) or parison (41) into a second container (96b), for delaying expanding the second portion (43) with respect to expanding the first portion (42) into the first container (96a) , and for subsequently separating the second container (96b) from the first container (96a).
Claims5
Apparatus for molding a pair of substantially identical plastic containers in tandem, which apparatus comprises:
- molding means, comprising a mold having first and second substantially identical container cavities, for receiving said first and second portions of a parison into said mold, for pneumatically isolating said first portion from said second portion, and for forming first and second substantially identical containers from said first and second portions, respectively;
- blow needle means, comprising first and second blow needles, for communicating inside said first and second portions, respectively;
- and
- means for supplying pressurized air to said first blow needle while isolating said second blow needle from said pressurized air, and for subsequently supplying pressurized air to said second blow needle.
Apparatus for molding a pair of substantially identical plastic containers in tandem, which apparatus comprises:
- extrusion means for extruding plastic tubing;
- severing means, for severing a parison from said plastic tubing that includes a first portion that is at a first average temperature and that includes a second portion that is at a second and higher average temperature;
- molding means, comprising a mold having first and second substantially identical container cavities, for receiving said first and second portions into said mold, for pneumatically isolating said first portion from said second portion, and for forming first and second substantially identical containers from said first and second portions, respectively;
- blow needle means, comprising first and second blow needles, for communicating inside said first and second portions, respectively;
- and
- means for supplying pressurized air to said first blow needle while isolating said second blow needle from said pressurized air, for cooling said second portion from said higher temperature, and for supplying pressurized air to said second blow needle subsequent to said cooling of said second portion from said higher temperature.
Dependencies are inferred from the claim text.