System for casting and handling concrete railroad ties

Details System for casting and handling concrete railroad ties System for casting and handling concrete railroad ties

1979-02-16

1981-03-10

Pavelko, Thomas P.

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...

264 70, 264228, B28B 2306

Patent

active

042551048

ABSTRACT:
Concrete railroad crossties are mass-produced by slip-forming concrete using a specially adapted continuous casting machine to deposit concrete over a plurality of forms arranged side by side and end to end above an elongated casting bed. Each group of side-by-side casting forms is supported above the bed on a carriage longitudinally moveable on rollers, thereby permitting relative movement of adjacent end-to-end carriages to compensate for concrete contraction when pretensioned wire strands in the concrete are detensioned and for a slight recoil action when adjacent end-to-end crossties are separated by sawing. An apparatus for lifting side-by-side crossties in groups is equipped with hydraulic jacks for forcibly ejecting the concrete crossties from their forms.

REFERENCES:
patent: 4102957 (1978-07-01), DaRe

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