Method of injection molding onto a central shaft

Details Method of injection molding onto a central shaft Method of injection molding onto a central shaft

B - Operations, Transporting

29

C

B29C 45/14 (2006.01)

Patent

CA 2136713

A method of making a product by integrally injection molding a plastic portion around a central shaft. The central shaft is made with a melt conduit having a central portion extending from a rear end to radial portions leading outwardly to the surrounding cavity. The central shaft is mounted in the mold extending concentrically through the cavity with its rear end adjacent the gate and the central portion of the melt conduit aligned with the gate. Pressurized melt is injected through the gate into the central portion of the melt conduit and flows outwardly through the radial portions of the melt conduit to fill the cavity around the shaft.

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