This will describe the sprue and runner system of molds.
Related posts:
- Gate system
- Product/Part design
Sprue
A sprue is a channel through which a molten plastic material is being injected from the nozzle of the injection machine into the mold. It has a smooth, round, tapered wall to allow smooth material flow.
Runner System
Runners are channels where material flows from the sprue to the cavities.
Conventional Runner:
Improved Runner:
Balanced Runner: Resin is evenly distributed throughout the cavities. Volume and condition is the same. There is more material used because the total runner length is longer compared to the other two.
Hot Runners:
If hot runner system can be designed for PVC and CPVC injection moulded fittings? If YES how? If NO why?
Regards.