According to the material, hollow balls can be roughly divided into two categories: metal hollow balls and plastic nylon hollow pepper balls. The manufacturing method of metal hollow balls is completely different from that of plastic hollow pepper balls. The manufacturing method of metal hollow balls is mainly welding technology, while the manufacturing method of plastic nylon hollow pepper balls is mainly blow molding.

In addition to welding, there is also a manufacturing process called centrifugal casting, but the metal hollow balls produced by centrifugal casting generally need to be more than 50mm in diameter before they can be produced, while the minimum manufacturing specification of plastic nylon hollow pepper balls is more than 10mm in diameter, and plastic nylon hollow pepper balls can also be manufactured by welding process, but due to the low melting point of plastics, Therefore, there is no need for high-temperature welding like metal balls. The welding technology of plastic nylon hollow pepper balls is produced by laser welding technology. Compared with metal hollow balls, it has higher efficiency, better precision and lower cost.