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Head for mixing and ejecting interacting liquid components, for molding plastic materials

  • US 4,332,335 A
  • Filed: 09/16/1980
  • Issued: 06/01/1982
  • Est. Priority Date: 03/09/1978
  • Status: Expired due to Term
First Claim
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1. A head for continuously mixing and ejecting interacting liquid components into a mold for molding articles made of plastic material, comprising in combination:

  • a body defining a mixing chamber for the components;

    a discharge duct having an outlet;

    at least a first and a second infeed duct for injecting individual components into said mixing chamber for a predetermined time period;

    exit port means for establishing fluid communication between said infeed ducts and said discharge duct, said infeed ducts being provided with outlet orifices that open into said mixing chamber close to said exit port means; and

    piston means for controlling fluid communication between said infeed ducts and said discharge duct outlet so that fluid communication is established therebetween during substantially the entire predetermined time period when said infeed ducts are injecting components into said mixing chamber so that injected components flow continuously out of said mixing chamber through said discharge duct and are thoroughly mixed during their passage through said discharge duct, said mixing chamber forming an angle of substantially 90°

    with said discharge duct and having a length shorter than and a volume less than that of said discharge duct so that components injected into said mixing chamber mix with each other and overflow into said discharge duct in a swirling flow.

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