Concrete Industries (monier) Limited

Robert Lyndon Bratchell

A method of moulding concrete ties or other similar articles having pre-stressed reinforcing wires or rods therein, wherein a series of open ended multi-cavity moulds of similar cross-sectional shape are aligned end to end in groups, wires are positioned in the aligned cavities of the moulds and are tensioned, the wires are separated from one another and into horizontal rows in each group by flat sided bar like spacers which are interposed between the ends of adjacent moulds of that group, while the groups themselves are separated by vertically movable spacer plates each having vertically extended slots which arrange the wires into vertical rows. The wet mix of concrete is then discharged into the moulds to surround the reinforcing wires, and after initial set of the concrete the flat sided bar like spacers are withdrawn laterally while the vertically slotted spacer plates are depressed downwardly, and the wires thus exposed between the adjacent moulds and also between the adjacent groups are severed by a driven cutter disc of abrasive material.

In-line moulding of prestressed concrete articles

A method of moulding concrete ties in a series of open ended multi-cavity moulds which are arranged to have corresponding cavities aligned, and comprises positioning reinforcing wires in the aligned cavities and straining the wires, positioning spacers between adjacent ends of adjacent moulds and between the wires, filling the moulds with wet concrete to surround the wires, removing the spacers after the concrete has set and releasing the tension on the wires, severing the wires between adjacent moulds, coupling a tilt frame to one side of a mould frame and a base frame, the tilt frame comprising a pivot having a longitudinal axis, and lifting the other side of the mould frame to thereby pivot the mould frame about the longitudinal axis, lowering the mould frame to invert it and discharging the ties from the inverted moulds.

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Ottoway, Australia

Robert Lyndon Bratchell