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Variable wall concrete molding machine

  • US 6,086,350 A
  • Filed: 01/10/1994
  • Issued: 07/11/2000
  • Est. Priority Date: 05/26/1992
  • Status: Expired due to Fees
First Claim
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1. A portable concrete molding apparatus, comprising:

  • (a) a portable trailer having a longitudinal axis;

    (b) a first fixed wall affixed to the trailer, the first fixed wall including an outer substantially planar mold surface and a second plenum surface, the first fixed wall including a plurality of rib members extending from the plenum surface to form a plurality of heating channels adjacent the first fixed wall;

    (c) a second fixed wall affixed to the trailer parallel to the first fixed wall and spaced apart from the first fixed wall by a given distance, the second fixed wall including an outer substantially planar mold surface and a second plenum surface, the second fixed wall including a plurality of rib members extending from the plenum surface of the second fixed wall to form a plurality of heating channels adjacent the plenum surface of the second fixed wall, wherein the plenum surface of the second fixed wall opposes the plenum surface of the first fixed wall;

    (d) a housing extending between the first fixed wall and the second fixed wall to form a furnace plenum therebetween, the furnace plenum including a return duct fluidly connected to the heating channels of the first fixed wall and the second fixed wall, the furnace plenum having an inlet exposed to the heating channels of the first fixed wall and the second fixed wall and an outlet exposed to the return duct;

    (e) a heater having an inlet and an outlet, wherein the heater outlet is fluidly connected to the furnace plenum inlet and the heater inlet is fluidly connected to the furnace plenum outlet to form a substantially closed fluid circuit between the heater and the furnace plenum;

    (f) a plurality of transverse channels connected to the trailer transverse to the longitudinal axis;

    (g) a first set of transverse beams slideably disposed within the transverse channels;

    (h) a second set of transverse beams slideably disposed within the transverse channels;

    (i) a first movable wall connected to the first set of transverse beams for movement relative to the first fixed wall between a casting position adjacent the mold surface of the first fixed wall for forming a first mold therebetween and a discharging position remote from the first fixed wall, the first mold including a first concrete inlet for introducing concrete into the first mold; and

    (j) a second movable wall connected to the second set of transverse beams for movement relative to the second fixed wall between a casting position adjacent the mold surface of the second fixed wall for forming a second mold therebetween and a discharging position remote from the second fixed wall, the second mold including a second concrete inlet for introducing concrete into the second mold.

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