Apparatus, system, and method for blow molding of plastic
AssigneeLarson Tool Company, LLC
InventorsMichael R. Larson, Raymond L. Larson
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Abstract
In various embodiments, devices, systems, and methods for blow molding plastics are provided. In particular, the present disclosure provides for devices, systems, and methods that are configured to create an internal cooling airflow, using conductive and convective cooling thermal properties, such that the cycle time for blow molding plastics is reduced. The decrease in cycle time provided for in accordance with the disclosed devices, systems, and methods are between, approximately 15 percent and 35 percent.
Claims20
1) A device for facilitating internal cooling within a mold during blow molding operations, the device comprising:
- a blow stem;
- a supply port forming part of said blow stem, wherein said supply port is configured to supply fluid to said mold;
- and
- an exhaust port forming part of said blow stem, wherein said exhaust port is configured to exhaust fluid from said mold.
8) A plastic molding system, comprising:
- a fluid supply;
- a fluid exhaust;
- and
- a bidirectional blow stem configured to receive a fluid from said fluid supply and supply said fluid to a parison to inflate said parison and configured to exhaust fluid from said parison to said exhaust channel during cooling of said parison, but before the parison is cured.
19) A method of making blow molded plastics, comprising the steps of:
- supplying a parison to a mold;
- supplying a blow stem with pressurized air;
- forcing said parison to conform to said mold;
- stabilizing said parison in said mold;
- creating an airflow within said mold to cool and cure said parison and said mold;
- removing said cured parison from said mold.
Dependencies are inferred from the claim text.