Mold assembly for pre-stressed concrete railroad ties

Details Mold assembly for pre-stressed concrete railroad ties Mold assembly for pre-stressed concrete railroad ties

1987-10-21

1989-03-14

Reeves, Robert B.

Plastic article or earthenware shaping or treating: apparatus

Distinct means to feed, support or manipulate preform stock...

And means to apply stress to preform and uniting in stressed...

249 86, 425 62, 425436R, B28B 716

Patent

active

048121134

ABSTRACT:
Prestressed concrete railroad ties are formed in molds which are supported by existing track near the area where they are to be installed. Each mold will form a number of ties. Reinforcing strands are located within a plurality of longitudinally spaced molds. Concrete is then poured into the molds and the ties are formed bottoms up in the molds. A group of ties are simultaneously removed from a given mold by a special extractor which first simultaneously clamps the reinforcing strands extending outwardly from a given mold, and then lifts the strands as a group from the mold by a suitable crane. Preferably the center of gravity of ties is spaced from a pivot point which will cause 180.degree. rotation locating the ties in upright position to be loaded on a railway car or other vehicle to take them to the site where they are to be installed.

REFERENCES:
patent: 1022763 (1912-04-01), Willenborg
patent: 3608163 (1971-09-01), Harford
patent: 3666385 (1972-05-01), Baker
patent: 4149306 (1979-04-01), Tice
patent: 4242071 (1980-12-01), Stinton

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