Electric soldering iron smaller parts, such as micro switch, etc., need to pay attention to what, the temperature will damage the plastic?
The normal temperature of 350 is enough, a short time will not damage the plastic components, don't burn too long, too long with the connection of metal components will solder joint temperature change to heat conduction and plastic, resulting in high temperature hot plastic body!
First, welding three elements: 1, heating time is 3 seconds is appropriate, too short drops, the liquid solder can not flow into the welding hole, tin heap into round or tinOval shape is not qualified; time is too long (over 10 seconds, it is easy to weld the welding disc, components are generally resistant to high temperature, not easily welded)2, iron evacuation angle, should a pad 0 degrees to evacuate, instead of 45 or 90 degrees (this is the conclusion I repair two products, who also don't want to deny), along the pad 45 or 90 degrees from foot drop, tin heap will appear elliptical and spherical.
When welding microswitch1) there must be a constant temperature ferrochrome;2) the temperature of the electric ferrochrome nozzle must be controlled within 230~280 degrees;3) welding time can not be too long (otherwise it will lead to deformation of the contact material, will be invalid
