Aluminothermic Welding

AutoSeal® Moulds

Streamline the welding process with Pandrol’s newest aluminothermic welding innovation. Our AutoSeal® moulds are designed to seal welds safely and efficiently, with no need for  luting sand or paste – unlike traditional methods of mould welding.

Pandrol AutoSeal® Welding Moulds Explained

Aluminothermic mould welding traditionally involves luting – which seals the moulds to the rail ends with paste or sand to avoid metal leaks. AutoSeal® removes the need to do this while providing leak and moisture-free results. The built-in strip expands during the pre-heating phase to create a tight weld seal between the mould and rail. Benefits of this welding sealing method include speed, increased reliability, reduced waste and a more comfortable, less stressful process for the welder.

The new technology is compatible with vignole and groove rails and is recommended for the most demanding networks, meeting the needs of short possession times and high safety standards.

  • Luting-free mould welding
  • Seal welds faster and safer than traditional methods
  • A leak-free welding sealing solution
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PRODUCT INFORMATION SHEET

Advantages of using AutoSeal® Moulds

01

Time-saving

Save three to five minutes per weld with Pandrol’s AutoSeal® welding mould solution. The moulds seal automatically with their built-in expanding strip, removing any need for luting with sand or paste.

02

Safety and reliability

Guarantee welder safety. Pandrol AutoSeal® welding moulds have a self-sealing felt strip that is more reliable than manual luting sealing methods, preventing leaks and defects that could otherwise occur in cold weather and tight spaces.

03

Reduced defect rate

Ensure more consistent, high-quality results for your rail welds with AutoSeal® moulds, which are designed to reduce the defect rate by facilitating moisture evacuation during the preheating process.

04

Environmentally-friendly

Reduce plastic waste and improve your site’s carbon footprint. AutoSeal® moulds reduce the amount of energy needed for the production and transportation of aluminothermic welding materials for a more environmentally friendly solution.

05

Versatility

Choose welding moulds that are suitable for a range of applications. Our self-sealing weld moulds are compatible with vignole and grooved rails for convenience and multi-site use.

Technical Capabilities of AutoSeal® Moulds

01

Automatic sealing

Create a tight, leak-free seal between the mould and the rail with AutoSeal® moulds’ built-in expansive strip, which automatically expands in response to heat during the preheating phase of the aluminothermic weld.

02

Felted mould

Eliminate the need to manually grind the mould against the rail during set-up for the perfect fit. The AutoSeal® mould is equipped with compressive felt to perfectly fit the rail profile, providing precise, leak-free performance.

03

Moisture escape

Eliminate the need to manually grind the mould against the rail during set-up for the perfect fit. The AutoSeal® mould is equipped with compressive felt to perfectly fit the rail profile, providing precise, leak-free performance.

04

Compatible with worn rails

Complete weld repair or replacement on rails with up to 3mm of wear with the standard configuration of AutoSeal® mould. Welding up to 6mm wear or more is also possible with an adapted procedure.

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