Producing the seamless plastic ball

Hello Josef,

I just watched a video on YouTube about how they make there ball's. In the first few seconds you see where they take a wafer and put it in this tool. The wafer starts to rap around the metal ball in the tool and it looks like they are using heat. But after that few seconds the video goes into how they make balls with seems. Oh Yea, the video is from Nittaku. There is one thing of interest that I was reading about. That all 3 polyball manufacturers (DHS, Nittaku, and Xu Shafa) are in some type of patient infringement dispute over how the seamless balls are made.

Just thought this might be of interest to ya,all.;-) 

that is interesting video. I could imagine something like this for production with seam but seamless balls remains mystery to me. Probably the balls are only seamingly seamless :-)

Some more info here

http://tabletennisengland.co.uk/news/plastic-balls-production-update/

Dieter

thanks. Given this info, I found the patent - http://www.google.com/patents/CN101585224A?cl=en

With the automatic translation it is not very readable but seems that they are adding composite material to form and rely on rotation to spread it evenly.