The manufacturing method of plastic pepper ball shell is completely different from that of PP hollow ball. The plastic pepper ball shell is made by laser welding technology, while the PP hollow plastic ball is made by blow molding technology. The advantages of blow molding technology are high efficiency and low cost, while the laser welding technology is high in manufacturing cost and low in efficiency.The plastic pepper ball shell is manufactured by laser welding technology. The manufacturing process is divided into injection molding, laser welding, grinding by plastic ball milling machine and polishing by special polishing machine for plastic balls. In addition to the plastic hollow ball mold for injection molding, the plastic pepper ball shell also needs to be manufactured with special welding tools, so the manufacturing of plastic pepper ball shell has high initial investment and low processing efficiency. The manufacturing cost is several times more than that of the hollow plastic ball manufactured by blow molding. The advantages of laser welding of the plastic pepper ball shell are that the plastic hollow ball has high strength, the density can be designed and produced as required, and the precision can be within 0.01, and it looks no different from the solid plastic ball.