Can this be eliminated on a mold?
Why do some groups use or not use?
A location ring can be eliminated on a mold BUT it is there for a reason.
A location ring makes for a quick setup when installing a mold into a molding machine. It centralizes the mould sprue with the machine nozzle and also aligns the clamping holes with the mould holes.
Setup would be time consuming and dangerous without it but in reality a mold can produce parts without a location ring.
The only reason that I could suggest why one wouldn't be used is because of lack of planning and production pressures: maybe a sudden change of machines and therefore a change in location ring diameter. It takes a couple of hours to make a new one.
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