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US 4,690,633 AGranted
Apparatus for preparing hollow plastic articles
AssigneeHusky Injection Molding Systems Ltd.
InventorsRobert D. Schad, Herbert Rees, Gary Hughes, John R. Murchie
Life of this patent
Estimating the term…
Abstract
The apparatus of the present invention involves transferring plastic parisons from a receiving station to a finishing station on a plurality of pallets in a single row for forming said parisons into hollow plastic articles. The pallets with parisons thereon are transported through a temperature conditioning means for temperature conditioning said parisons to render same suitable for forming into said hollow plastic articles at the finishing station.
Claims13
An apparatus for preparing hollow plastic articles said apparatus comprising:
- a receiving station for receiving a first number of plastic parisons;
- an injection molding machine in spaced relationship to said receiving station for injection molding said first number of plastic parisons in an injection molding cycle for transfer to said receiving station and means for transferring said first number to said receiving station;
- a finishing station for forming said plastic parisons into said hollow plastic articles;
- a first conveyor means moving from said receiving station to said finishing station;
- a second conveyor means returning from said finishing station to said receiving station;
- a multiplicity of pallets successively entrainable by said first and second conveyor means in a single row, each of said pallets being provided with holding means for holding a second number of parisons less than said first number, wherein said pallets are operative to transfer said plastic parisons from said receiving station to said finishing station;
- means to transfer said pallets from said finishing station to said second conveyor means;
- means to transfer said pallets from said second conveyor means one at a time to said receiving station until said holding means at said receiving station corresponds to said first number;
- means for transferring said pallets with said parisons thereon one at a time from said receiving station to first conveyor means;
- and means for transferring said pallets with said parisons thereon one at a time from said first conveyor means to said finishing station to form hollow plastic articles.
7 more elements
An apparatus for preparing hollow plastic articles said apparatus comprising:
- a receiving station for receiving a first number of plastic parisons;
- an injection molding machine in spaced relationship to said receiving station for injection molding said first number of plastic parisons in an injection molding cycle for transfer to said receiving station and means for transferring said first number to said receiving station;
- a finishing station for forming said plastic parisons into said hollow plastic articles;
- a first conveyor means moving from said receiving station to said finishing station;
- a second conveyor means returning from said finishing station to said receiving station;
- a multiplicity of pallets successively entrainable by said conveyor means in a single row, each of said pallets being provided with holding means for holding a second number of parisons less than said first number;
- means to transfer said pallets from said finishing station to said second conveyor means;
- means to transfer said pallets from said second conveyor means one at a time to said receiving station until said holding means at said receiving station corresponds to said first number;
- means for transferring said pallets with said parisons thereon one at a time from said receiving station to first conveyor means;
- and means for transferring said pallets with said parisons thereon one at a time from said first conveyor means to said finishing station to form hollow plastic articles, including a post-cooling means between the injection molding machine and receiving station for post-cooling the parisons, carrying means for transporting said parisons from said injection molding machine to said receiving station provided with heat transfer means to post-cool the parisons from the injection molding machine, wherein said carrier means comprises an open ended tube having a taper corresponding to the taper of the parison but somewhat smaller than the parison so that said heat transfer means is operative to shrink the parison upon cooling with the parison sliding inside the tube to fit snuggly therein.
7 more elements
Dependencies are inferred from the claim text.