The difference between the swaged-in and the crimped-on wire of the electric cartridge heater
From the perspective of the lead structure, the electric cartridge heater is generally divided into an internal lead structure and an external structure. Then, what is the substantial difference between the two? Please see the following analysis:
1.The production process is different
Crimped-on wire: the internal resistance wire is welded with the lead rod (hard lead rod or multi-stranded soft wire) and then lead out, and then connect the high temperature lead.
Swaged-in wire: the high temperature lead is directly welded with the resistance wire and led out from the inside of the nozzle.
2.High temperature lead material is different
Crimped-on wire: Since the high-temperature lead is welded to the lead rod on the outside, the temperature of the welding part will not be too high at this time, and the high-temperature lead of the crimped-on wire generally has a temperature resistance of 200 degrees.
Swaged-in wire: Since the high temperature lead of the swaged-in structure is directly welded to the resistance wire from the inside and inside the nozzle, the temperature resistance of the inner core of the high temperature lead of this structure must reach at least about 800 degrees. Generally, pure nickel wire is used. The cost is also high.
3.The creepage distance is different
From the perspective of creepage phenomenon, the swaged-in wire is safer. The two lead rods of the crimped-on wire are insulated and insulated with a glass fiber sheath. If the two leads accidentally expire, there will be a hidden danger of power connection.
4.Productivity
The production efficiency of the swaged-in wire is far less than that of the crimped-on wire. The process of welding the swaged-in with the resistance wire is relatively difficult, so generally the lead of the swaged-in should not be too long.
5.Usage
Since the swaged-in wire is directly drawn from the inside of the nozzle, the root lead is very flexible and can be bent at will.
But the crimped-on wire is connected to the lead after the lead rod is led out, the root part is generally not free to bend.
If a lead wire rod is used, the root is very hard and cannot be bent.
If multi-stranded wire is used as the lead wire and then connected to the high-temperature lead, the root can be folded, but its flexibility is not as good as the swaged-in. At the same time, due to the high temperature, the multi-stranded wire is generally stainless steel wire or iron wire, which is easy to become brittle at high temperature. If the bending frequency is high, it is easy to break, but the pure nickel wire of the swaged-in does not have this problem.
