Hot welding machine for plastic disc

The invention provides a plastic disc hot welding machine which comprises a main machine body, a closed-loop type conveying guide rail is installed at the top end of the main machine body, a plurality of sets of jigs are slidably installed at the top of the conveying guide rail at equal intervals, and a pair of containing grooves is formed in one side of the top end of each jig. A hard rubber ring feeding mechanism, a PE film punching and cutting mechanism, a first heat sealing mechanism, a rubber disc feeding mechanism, a second heat sealing mechanism and a discharging mechanical arm are sequentially installed on the outer side of the top end of the main machine body, and a film hanging mechanism is installed at one end of the PE film punching and cutting mechanism and composed of a set of air expansion shafts and a plurality of sets of tightening shafts. Through cooperative use of the hard rubber ring feeding mechanism, the PE film punching and film cutting mechanism, the first heat sealing mechanism, the r