Railtech International

Pandrol Limited

Lionel Winiar

Jean-Jacques Thuru

Patrick T Bommart

Pierre Bordery

Francis Viseur

Patrick Bommart

Jean-Jacques (decede) Thuru

The invention relates to base part of a mold for aluminothermic welding of metal rails, which base part generally has a rectangular parallelepiped and has an upper face for receiving the foot of said rails, this upper face having a hollow cavity comprising a base, two opposing longitudinal side walls, and two opposing transverse side walls. The invention is characterized in that each of said longitudinal side walls has an intermediate region surrounded by two end regions, and these end regions are located in the same plane, whereas the intermediate region has a curved profile, the well of which is directed towards the opposite side wall.

Base part of a mold for welding metal rails

The invention concerns a method for the aluminothermic welding of rails, comprising the steps of: The invention also concerns a mold () adapted to fit over the two rail ends to form a molding cavity (), comprising a crucible () arranged above the region of the rail head so that it is fed with molten metal from the molding cavity () via a secondary channel ().

Method and device for the aluminothermic welding of rails

The mold for aluminothermic welding of metal rails has two components made of identical rigid refractory material and suitable for fitting around two ends of rails to be welded, each component includes: a lower part having a face defining a mold cavity suitable for enveloping the foot and a core of the ends of the rails, and a channel opening at the bottom into a lower region of the mold cavity and having at the top an opening and an upper part including a cooling chamber connected to the mold cavity and capable of containing the heads of the rail ends, the cooling chamber forming a non-compartmentalized volume to which the channel is connected via the opening and which is bounded by an external wall of each mold component.

Mold for direct-cast aluminothermic welding

The invention relates to a device for igniting an aluminothermic composition, characterized in that it comprises an electric resistor for connecting two electrodes and to be supplied by an electric current source of in order to generate heat by a Joule effect, said electric resistor being exposed to a medium comprising oxygen and carbon so that the temperature rise of the medium by the resistor results in the formation of carbon monoxide, and then in an exothermal reaction of the latter with oxygen, thus generating a flame capable of igniting of the aluminothermic composition.

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Ronchin, France

Lionel Winiar