1. Badminton feathers return to the factory for grade sorting (Level 1; Level 2; Level 3; level 4) 2.The computer is used to measure the camber and camber of the feathers to ensure the qualification rate of the stable flying badminton 3.The ball head ensures the weight consistency of the finished ball by weighing the weight of the ball again 4.After the measured feathers and the weighed ball head are matched accurately, the automatic ball inserting machine is equipped with the ball inserting device 5.The assembled semi-finished ball shall be injected with primer to ensure that the root of the badminton shuttlecock has sufficient strength and can resist the external force of the chopping (proper glue shall be injected into the inner and outer rings) 6.Wire binding for semi-finished ball and control the diameter of ball port (double wire binding at the same time) 7.With the most advanced rolling technology, the polymer resin glue is fully pressed into the two coils, not only on the surface of the coils. In order to ensure the batting resistance of badminton is much better than other technological methods 8.Check the flight stability of each ball with special ball testing machine to ensure that the flight stability standard is consistent with the level standard