Patent ID: 8443860

Claim:
A welding gun of plastics, said welding gun comprising: a main body made of insulating materials and provided with an upper cover and a lower cover, an accommodating space formed between said upper cover and said lower cover matched together, a cord hole bored in a bottom surface of said main body, an opening bored in an intermediate portion of said main body, two through holes bored in a front surface of said main body; a power cord having one end positioned in said main body and another end extended outward said cord hole of said main body to fasten with a plug used to connect with a power source; a power controller installed in said main body and electrically connected with said power cord, said power controller further provided with a rotatable button extended outward said opening of said main body; a transformer installed in a center of said main body and electrically connected with said power cord and said power controller respectively; two welding tubes made of electrically conductive materials and respectively having one end electrically connected with said transformer in said main body and another end formed as a plugging hole to extend outward said through hole of said main body; a welding wire made of conductive materials and provided with a connecting portion having two ends curved to form as two pins that can be electrically plugged in said plugging holes of said welding tubes; and a mechanism enabling said welding wire to convert electric energy into thermal energy that is able to instantly melt interface of two pieces of plastics so that said welding wire can be embedded in said plastics to reinforce fusing strength.