In the mechanical manufacturing industry, some plastic pepper balls are used to seal liquid as plastic sealed pepper balls. The sealing effect of plastic sealed pepper balls is largely related to the precision of plastic pepper balls and the surface smoothness. In fact, the sealing effect depends on the matching degree of parts that contact with plastic sealed pepper balls.

Plastic sealed pepper ball does not necessarily have a good sealing effect with high precision. If the precision of the parts closely attached to the plastic pepper ball is not high, it is obviously impossible to achieve the desired sealing effect by relying solely on the precision of the plastic pepper ball. Therefore, the sealing effect of plastic sealed pepper ball is good, and the precision of both parts should be high. Another factor is that the smoothness of the two parts should also be matched. If one is frosted and the other is smooth, the sealing effect is not good, so the sealing effect of plastic pepper balls must be strictly tested and matched with the parts to achieve the best sealing effect.