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how to design and build the "gear" "skew gear" "helical gear" molds

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Update time : 2018-08-31 15:10:43
How to design the gear mold like this image? 
Let's check out.
Pin-Point gate is first
Make round insert in core side,which is easy for wire-cutting skews
Thirdly, Add 2 more ball bearing to make sure the insert can be rotated.
Finally, add a sleeve pin in the middle. Bingo..