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There are 3D printers that are meant for quick prototyping of injection molds. They print the molding parts, and remove most of the cost of machining the mold. They arent suitable for mass manufacturing since the resulting mold wont last for very long, but is good enough for a small production runs. Now if you dont have access to something like this. Then ...


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Yes, the proportions of acrylonitrile, butadiene, and styrene can vary within some ranges. However unless you will be able to polymerize it yourself you will have to use a commercially available polymer. I would look as product information sheets for bulk polymer pellets sold for injection molding. From those you will be able to see the real available ...


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This was an unexpected surprise. The slot is for a mating element on the lower tube extension. I totally missed this. When stowed this way: the storage footprint is small and stable you can easily move the entire assembly in and out of a storage closet with one hand (by grabbing the handle on the base unit.) Thanks to Solar Mike and Zimano for their ...


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So it turns out that the ejector cylinder is just a standard double-acting cylinder with 2 hoses, the remaining 4 hoses are all used for the clamping cylinder. Two of the large hoses do retract and return at low pressure, the two remaining hoses one large and one small do the high pressure clamping. This is standard for a 2 platten direct clamping machine. ...


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Yes, this can be done as follows. The multiplicity of through-holes in the sidewalls of the part can be created using what's called a slide populated with small square pins that are moved in by hydraulic pressure or a mechanical cam to shut off against the male core in the mold. The part is extracted from the mold by withdrawing the slides and stripping the ...


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Consider a "one use" plastic syringe / mixer nozzle with a fixed volume of material ie enough for 5 shots or 10... Then at the end of the run the plastic unit can be removed and replaced with a fresh unit of whatever mix is needed - either the same or a new mix.


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the mold contains a rotary mechanism than unscrews the part off the mold core after the plastic is solid and the mold is split open. this is called an unscrewing mold and is used to make threads like this. the giveaway is the presence of engagement features around the part which are grabbed by mating features in that part of the mold that unscrews.


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Disclaimer 1: I've dealt with heating circuits, never with cooling circuits Disclaimer 2: I don't feel like doing your math for you, I'll just show the way. Here's how I would set it up (ignore the shaded areas, that's a scanner artifact): So you have a cooling manifold with 4 branches (on of which is drawn) for the hydraulic power packs and 4 branches for ...


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I believe that the Borda-Carnot equation is only valid for incompressible flows, while you mention that the injector orifice is choked. While the flow becomes incompressible pretty quickly after the orifice, at this precise point, it is not. In this case, I think you should use 1D isentropic nozzle theory (wikipedia offers a good start on the topic). If ...


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