DRILLING HOLES IN RAILROAD SLEEPER

Holes in railway ties are drilled and impregnated with creosote or other preservative using a hollow drill with consecutive drilling and creosote injection cycles, either at the time of rail mounting or in a prior processing stage so as to produce a tie with improved resistance to deterioration, for...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	J.K. STEWARD, H.V. BECKMAN
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW ORSIMILAR MATERIALS NAILING OR STAPLING MACHINES IN GENERAL PERFORMING OPERATIONS PLANING, DRILLING, MILLING, TURNING OR UNIVERSAL MACHINES FORWOOD OR SIMILAR MATERIAL PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FORIMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILARMATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITHPERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR TRANSPORTING WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL
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Beschreibung
Zusammenfassung:	Holes in railway ties are drilled and impregnated with creosote or other preservative using a hollow drill with consecutive drilling and creosote injection cycles, either at the time of rail mounting or in a prior processing stage so as to produce a tie with improved resistance to deterioration, for example due to ingress of water in the tie hole. The invention enables the preservation of pretreated ties, which are subsequently drilled to receive spikes for rail tie plates, by continuing the skin of creosote or other preservative from the outer surface of the tie to the walls of the drilled hole. A sealing collar assembly is mounted on the drill to prevent egress of preservative from the hole during the injection process.