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Machine for extruding cement-like material into articles

  • US 3,904,341 A
  • Filed: 03/21/1973
  • Issued: 09/09/1975
  • Est. Priority Date: 08/29/1975
  • Status: Expired due to Term
First Claim
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1. In an extrusion machine for making elongated articles of concrete-like material by forcing the material through a mold, said machine being moved forwardly by reaction as the material is forced against the molded portion of the article, the improvement which comprises a fixed transverse plate positioned across and closing the upstream end of the mold and having at least one elongated forming element mounted at an end thereof on the plate and supported thereby so as to extend downstream from the plate within the mold, the transverse plate being apertured adjacent to but out of line with said end of said forming element for the introduction of said concrete-like material into the mold, at least one duct disposed upstream of said transverse plate and communicating with said mold only through an aperture of said transverse plate, each duct having an inlet and including pumping means for feeding said concrete-like material from said inlet and through the associated aperture of said transverse plate into said mold and around said forming element.

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