Quote:
Originally posted by Since87
I'm fairly confident that it could be done, with the right plastic.
The biggest problem I see, is that when injecting the plastic, the plastic is going to have to 'flow past' the tip of the nozzle, in order to ensure that that part of the mold gets filled. This will tend to leave flashing at the nozzle tip which might be a pain to trim off.
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Actually, I don't believe this would be a problem at all. The real issue would be air bubbles at the tips of the nozzles. But this could be alleviated somewhat by using a low viscosity plastic which does not "set-up" too fast for the air to exit the tips. Unfortunately, this would adversely affect yields due to longer cycle times.
Also, there would be some possible flashing at the nozzle entrance (at least as I envision the mold). But the impact (and the cleanup) would be substantially decreased.
If you add some type of ejection from the nozzle bottoms, this would mitigate both of these issues, at a somewhat higher cost.
See cheezy MS Paint pic:
Bob
(Mold Designer in a previous life)