Apparatus for making oriented containers
AssigneeRainville Company, Inc.
InventorDewey Rainville
Life of this patent
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Abstract
The injection blow molding machine of this specification moves oriented containers. Parisons applied to core rods move from an injection mold to a conditioning station that provides time for the full thickness of the parison to come to the same temperature. The parisons are then transferred, by a transfer device, to other core rods on a second indexing head of the machine which carries the parisons to a stretch-blow station at which they are stretched to obtain orientation. After the parisons are blown to final size, they are stripped from the core rods of the second indexing head. The transfer device turns the parisons to 180.degree. in a plane of their axial length in order to transfer them from one core rod to another.
Claims14
Blow molding apparatus for making plastic containers including in combination a first indexing head having an injection station, a treating station and a stripper station at angularly spaced locations around the perimeter of the first indexing head, a second indexing head having angularly related operational stations including a transfer station, a blow station and a stripper station around the perimeter of the second indexing head, core rods extending from the angularly related faces of both indexing heads, a transfer device located between the stripper station of the first indexing head and the transfer station of the second indexing head, and means to move the transfer device into a position to receive parisons stripped from core rods of the first indexing head, and into a position to supply parisons, that have been stripped from the first indexing head, to core rods of the second indexing head.
A blow molding apparatus for blow molding hollow articles including a combination a first indexing head with core rods extending from angularly related faces of the first indexing head, parison providing means associated with the first indexing head, intermittently movable mechanism for moving core rods in unison with the angular movement of the indexing head, a second indexing head with core rods extending from angularly related faces of the second indexing head, blow molding means associated with the second indexing head, intermittently movable mechanism for moving core rods in unison with the angular movement of the second indexing head, both of the indexing heads being movable into positions where a core rod on one head is in alignment with a core rod on the other head, and a transfer device that receives a parison from the first head and that turns it around and places it on the core rod of the second head.
Dependencies are inferred from the claim text.