Plastic article or earthenware shaping or treating: apparatus – With separate and distinct upstream agitating or kneading means – Plural means being diverse – or parallel and intermeshing or...
Patent
1986-02-28
1988-02-09
Spitzer, Robert
Plastic article or earthenware shaping or treating: apparatus
With separate and distinct upstream agitating or kneading means
Plural means being diverse, or parallel and intermeshing or...
425205, 425208, 425209, 425376B, B29C 4750
Patent
active
047239000
ABSTRACT:
An extruder for the manufacture of concrete slabs, particulary hollow slabs, in a movable relationship with a casting mold. The extruder includes a feed hopper, at least one feeder, particularly an auger for generating internal pressure in the cast concrete, and at least one core member for generating a desired slab cross-section. The extruder in accordance with the invention has an assembly of at least one contoured core section which performs a combined movement of oscillatory rotation and longitudinal reciprocation to generate inside the molding space a compacting shear action in the concrete mix. The extruder in accordance with the invention is especially applicable for the production of profiled concrete objects with elongated shape at low noise and vibration levels.
REFERENCES:
patent: 2810159 (1957-10-01), Teichmann
patent: 3788612 (1974-01-01), Dray
patent: 3865354 (1975-02-01), Burpulis et al.
patent: 4022556 (1977-05-01), Goetjen
patent: 4119025 (1978-10-01), Brown
patent: 4461734 (1984-07-01), Jones et al.
KT-SUUNNITTELU Oy
Spitzer Robert
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