- Need Help!- Help Troubleshooting Small Injection Mold for Small Card
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Re: Help Troubleshooting Small Injection Mold for Small Card
I think your fan is too far from the part and it cools too fast.
Your melt should probably be hotter and maybe heat your mold for some better performance in a very difficult part.
ABS is tough to use.
I would use PP or PE. ABS doesn't really melt and will cool easier which is why it stopped flowing.
Your mold was also probably cool and froze the flow.
Also with the fan I would guess your 0.25 sprue doesn't feed enough material fast enough.
If you are going to use the fan as is I would make the last 0.050" (near the part) of the fan as is and make the rest deeper to get the hot material into the cavity before it cools.
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Re: Help Troubleshooting Small Injection Mold for Small Card
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Re: Help Troubleshooting Small Injection Mold for Small Card
I suspect... as the others said ...
heat the mold.
Provide more details, like always, if you want more practical advice.
Is the material going in fast enough ?
Are You looking for good/best quality or best time ?
Are You looking for cycle times at all ?
Probably, pre-heated materials and pre-heated molds, would work fine. Imho.
Slow, per molding standards, but if you do not need production speeds..
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Re: Help Troubleshooting Small Injection Mold for Small Card
1. After doing all what was mentioned before....try using a higher flow index material, even it is not ABS just see how your part fills.
You can get PP up to 100 flow
These higher ABS flow materials were/are made for thin wall applications (cell phones).
2. Put some masking tape to increase air vents at opposite from the injection point, and see what happens
3. Make fan gate height larger than card height to have it freeze much later that it is. You will then have to cut it off with some press cutter
4. Turn your mold design 90 degrees and inject thru the shorter side to be able to fill
5. If you heat up the mold try going up to 100 C if necessary
Someone mentioned they used vacuum sealed molds.
Instead of air vents you apply a vacuum to the mold to eliminate all counter pressure from pushing the air out
- Need Help!- Help Troubleshooting Small Injection Mold for Small Card
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