METHOD OF MANUFACTURING POINT SLEEPERS Russian patent published in 1994 - IPC

FIELD: railway engineering. SUBSTANCE: in point sleeper for works the sheet of the formwork bottom serves at the same time as the template for relative positioning of embedded parts. The formwork is normally manufactured anew for each batch of the sleepers of the same type. In case of small production batches with different positions of the embedded parts, multiple use of the formwork bottom sheet is expedient. This is accomplished by the fact that before being mounted in the formwork, the bottom sheet is provided with drilled holes for a few types of precast members. The unnecessary holes are temporarily plugged by a suitable mean, and the combination of drilled holes required for fabricating the certain types of precast members is detected by the certain search method and is freed from temporary plugging. EFFECT: extended functional capabilities. 13 cl, 8 dwg