Method of manufacturing a liquid cooled blow molded article
AssigneeVisteon Global Technologies, Inc.
InventorsBrad Alan Miehls, Bradley Allen Silvius
Life of this patent
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Abstract
A method of blow molding a plastic article. A plastic article is blow molded within a mold. The article has plastic parison a wall. The wall is pierced by a first and a second needle or blowing pin. The wall forms a fluid-tight connection between the first needle and the parison wall. A volume of cooling liquid is injected into the article through the first needle. The cooling liquid cools the interior wall. Gas is vented from within the article through the second needle while the cooling liquid is injected into the article. The cooling liquid is evacuated through the first needle after the interior wall is cooled sufficiently to be removed from the mold.
Claims12
A method of blow-molding a plastic article comprising the steps of:
- placing a plastic parison within a mold and blow-molding said plastic parison to a plastic article, said article defining an interior parison wall;
- penetrating said interior parison wall with a first needle and a second needle;
- wherein said article has a top and a bottom with said bottom located at the lower most portion of said article while said article is in said mold and said first needle pierces the bottom of said article;
- injecting a volume of cooling liquid into the interior of said article through said first needle, said cooling liquid cooling said interior parison wall;
- simultaneously venting gas from within said article through said second needle while said cooling liquid is injected into said article;
- and
- evacuating said cooling liquid from said first needle after said wall has cooled sufficiently to be removed from said mold.
A method of blow-molding a plastic article comprising the steps of:
- extruding a plastic parison within a mold, said parison having an interior and an exterior wall;
- partially inflating said parison to form an article having a top and a bottom with the bottom located at the lower most portion of the article while said article is in said mold, and with the top located at the top most portion of the article while said article is in said mold;
- moving a first needle from a retracted to an extended position to pierce said bottom with a first needle;
- moving a second needle from a retracted to an extended position to pierce said top with said second needle;
- injecting a volume of cooling liquid in excess of the volume of the article to cause said cooling liquid to circulate through said article and out of said second needle, said cooling liquid cooling said wall;
- venting gas from within said article through said second needle while said cooling liquid is injected into said article;
- injecting a quantity of gas through said second needle;
- and
- evacuating said cooling liquid under pressure through said first needle after said wall has cooled sufficiently to be removed from said mold.
Dependencies are inferred from the claim text.