Mould for aluminium-thermite welding of rails

The casting mold for aluminothermic welding addresses defects in rail head connections by using lateral vents and expanded internal cavities to control pouring and surfacing, ensuring defect-free welds.

RU2865174C1Active Publication Date: 2026-07-01OBSHCHESTVO S OGRANICHENNOJ OTVETABTVENNOSTJU KOVCHEG
View PDF 5 Cites 0 Cited by

Patent Information

Application Number
RU2025136880
Authority / Receiving Office
RU · RU
Patent Type
Patents
Current Assignee / Owner
Filing Date
2025-12-18
Publication Date
2026-07-01
Estimated Expiration
2045-12-18

AI Technical Summary

Technical Problem

Existing aluminothermic welding technologies fail to achieve defect-free connections of rails with defects in the rolling surface area of the rail head, as either increasing pouring speed to prevent underfills or reducing it to remove gases and slags results in incomplete removal of defects.

Method used

A casting mold design with lateral vents, side channels, and expanded internal cavities that allow controlled pouring and simultaneous surfacing with thermite metal, ensuring removal of gases and slags while preventing underfills and defects.

Benefits of technology

The mold ensures defect-free connections by allowing controlled pouring and simultaneous surfacing, eliminating gas pores, slag inclusions, and underfills in the rail head area, achieving a seamless weld.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure 00000001
    Figure 00000001
  • Figure 00000002
    Figure 00000002
  • Figure 00000003
    Figure 00000003
Patent Text Reader

Abstract

FIELD: welding.SUBSTANCE: invention relates to a casting mould for aluminothermic welding of rails and can be used in the conversion of an existing section track into a continuous track. The casting mould for aluminothermic welding of rails includes two halves of the mould, each of which comprises a lateral shrink head, the upper part of which communicates with the atmosphere, and the lower part of which communicates with the lower part of the welding cavity. The cross-sectional area of the shrink head in its lower part is larger than in its middle part, and also larger than in its upper part. The casting mould includes two upper lateral channels, each of which communicates with its upper part with the space above the casting bridge, and with its lower part with the lower lateral channel, which is connected with its lower part with the lower part of the welding cavity; two middle channels, communicating the upper lateral channels with the middle part of the welding cavity in the area of the rail heads; two upper channels, communicating the upper lateral channels with the upper part of the welding cavity above the rail heads. In addition, each of the half-forms is made expanded to form an internal welding cavity in its middle and upper parts with a width greater than the length of the defective zone of the rolling surface of the rail head adjacent to the weld, adapted for surfacing said zone with thermite metal, simultaneously with welding the ends of the rails.EFFECT: defect-free connection of the ends of rails that had defects in the rolling surface area of the rail head.9 cl, 9 dwg
Need to check novelty before this filing date? Find Prior Art

Citation Information

Patent Citations

  • casting mold for aluminothermic welding

    DE1239915B

  • CASTING MOLD FOR ALUMINOTHERMITE WELDING OF RAILS

    RU192155U1

  • Casting mould for aluminithermic welding of rails

    RU2116875C1

  • Mould for aluminothermal welding of rails

    RU2559388C2

  • CASTING MOLD FOR ALUMINOTHERMITE WELDING OF RAILWAY RAILS

    RU80459U1