Lead-contained plastic speaker shell and hot plate welding method thereof

The invention provides a lead-contained plastic speaker shell and a hot plate welding method thereof. The plastic product is prepared from the raw materials in percentage by weight: 70% of polypropylene and 30% of lead. The plastic product comprises an upper shell and a lower shell which are mutually connected. The plastic product with higher lead content is higher in rigidity. A hot plate weldingmachine comprises an upper jig, an upper jig driving mechanism, a hot plate, a hot plate driving mechanism, a lower jig, and a lower jig driving mechanism. The hot plate driving mechanism drives thehot plate to move in the horizontal direction. The hot plate is arranged between the upper jig and the lower jig in the vertical direction. The upper jig driving mechanism drives the upper jig to movetowards the hot plate. The lower jig driving mechanism drives the lower jig to move towards the hot plate. The heating mechanism drives the hot plate to heat. According to the hot plate welding method, the hot plate welding ma