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Netcraft Molds

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I have thier grub mold and I could not get them to pour correctly. There was just not enough pressure to get the tails to come out right. When using thier injector the grub comes out pretty good. I am not a fan of thier whole injection system though. I think they are dangereous and time consuming.

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I use them quite a bit. I don't like the plastic clips they use to hold the molds closed, so I bought a bunch of boston bulldog clamps (paper clamps) which work pretty well. The injectors aren't great, but once you figure out their foibles, they do work, I figure they're sort of expendables, and they only cost about 10 bucks a piece. The built in injectors for the 6 inch curl tail grubs are worse, I've turned new plungers on the lathe to replace them. The biggest problem with the separate injectors, other than they're just kind of flimsy, is when you pour the plastic into them, the metal tip immediately solidifies the plastic that enters it. You have to pick out this plug while putting a little pressure on the plunger. Once the plug is out, liquid plastic will come out the nozzle, and you've got to inject a bunch of molds quickly to make the process worthwhile. If you don't realize the tip is plugged and just put more pressure on the plunger trying to force plastic into the mold, that's when bad things happen, like the plunger bending and allowing liquid plastic to go by. If you pay attention to these details, and get 4 or 5 molds ready to inject, you can be fairly productive. However, I must say, I only use them for personal use, there's no way I'd try to inject enough to make it a business. The darn things also develop stress cracks over time, and I'm always expecting one to just disintegrate while I'm injecting it, but that's not happened so far. Some of them have multiple ports to inject, it's not the easiest thing to do, and still get all the parts to adhere. I've also found some molds which don't have good mating surfaces and produce a lot of flash. You just never know what a particular mold is going to be like. I've also used plastic syringes to inject the molds, they have a somewhat limited life, because they have poor heat resistance, but ones without a luer lock tip will work.

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I could really do with a close up of the mold (I should have said, sorry). I want to see how the mold is vented, to see if anything could be modified or adapted to make it pour.

If the mold is not usable as it is and you are up to a little experimentation, I'm sure I could come up with a plan. It is either that or just sell it!

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