Difference between revisions of "Thermeld Strip"
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Revision as of 06:15, 26 December 2018
Thermeld strips operate in much the same way that Linear burning ropes do, but to weld surfaces together in an emergency, rather than cut them. Thermeld is not a substitute for conventional welding equipment, but is a handy emergency substitute.
Thermeld comes in 15cm long x 5cm wide x 3 cm deep strips of mildly flexible bright pink putty-like material, wrapped in yellow and black striped cellophane-like material, with a pull-strip on the base to expose a mildly adhesive base. Each strip is further wrapped in a vacuum-sealed transparent wrapping that also contains two piezo-electric initiator plugs.
After removing the strip from the outer packaging, and securing the initiators in a safe place, the bottom peel-off strip is removed, and the strip affixed to the joining surfaces to be welded together.
Two initiators are supplied for times when stress is high: It is not uncommon for an initiator to go 'walkies' and having a second initiator to hand is a measure of insurance against stress-induced forgetfulness. One initiator is sufficient to ignite an entire length of Thermeld strip; the initiator is pushed into a convenient place in the Strip, much like a plastic explosives detonator plug might be. The red and yellow striped tab is peeled off, to reveal a bright red and yellow pull ring. the ring connects to 1mm thick by 30cm long cable leading to a wind-up detonator within the body of the initiator, which then charges a high-charge capacitor, which on reaching full capacity, discharges after five seconds into the strip, which then ignites.
The rope burns extremely brightly (in a similar way to magnesium) and with very high temperature within the material being burned through; surrounding temperatures are high, but not excessively so. It takes about ten seconds for a weld to be conducted, and the welded surfaces will be exceedingly hot to the touch for about half an hour after burning.