Pingpong ball with convex rib net on inner wall of ball body
2010
The utility model relates to a pingpong ball with a convex rib net on the inner wall of the ball body. After the openings of two semispherical shells with convex rib nets on the inner walls are stuck together, the two semispherical shells are heated and expanded to form the round pingpong ball in a mould. While the weight of the ball body is controlled within a standard range, the thickness of the wall of the ball is relatively uniform, the overall rigidity of the ball is high, the hardness of the top and the corner is relatively uniform, and the elasticity is relatively consistent.
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