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Post Info TOPIC: reproducing some simple plastic parts
DJD


SCARBOROUGH, ONT

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reproducing some simple plastic parts
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www.youtube.com/watch?v=aNBHtlhlHF4

 

quote below is from video  post

 

TOOLS & MATERIALS FEATURED IN THIS VIDEO ▶ Smooth-On Mold Star 15 Slow Silicone Mold Rubber (Trial Unit): https://amzn.to/2T6zu8J ▶ Smooth-On Smooth Cast Onyx Fast Black Casting Resin (Trial Unit): https://amzn.to/2MlTCRC ▶ Smooth-On Universal Mold Release: https://amzn.to/2stpDxY ▶ FastCap 2P-10 CA Glue (Medium Viscosity): https://amzn.to/2FGf9D3 ▶ General Tools Automatic Center Punch: http://amzn.to/2htnN9B FAQs ▶ Why didn't I degas the silicone? Mold Star is a low-viscosity silicone that doesn't require degassing. I've never had a problem with bubbles when using it. Any bubbles find their way to the top where I have fun popping them, though they generally pop themselves. ▶ Why didn't I just 3D print the knobs? Even if I had a 3D printer, which I don't, I still would have molded the originals because I wanted identical copies (wear and all), not facsimiles with lines in them that I'd have to spend a bunch of time sanding and refinishing. ▶ Why didn't I make a two-part mold? I covered that at 3:54. You must have skipped ahead. Also, it isn't a matter of just flipping the mold and pouring silicone on the other side. You also have to consider the sprues necessary to allow pouring the resin into the resulting mold. And because the knobs are oddly shaped, you may also have to add sprues for venting undercuts so air doesn't get trapped. Then, after demolding, you have to cut off the resulting sprues, file down the flashing and polish them out to get the surface finish back. And, really, there's not much surface area on any of the knobs to accommodate decently sized sprues to begin with. In the end, it's easier just to use a simple, one-sided block mold and drill holes in the bottoms of the knobs. OTHER NOTES ▶ For more information on how to create molds, check out some of Smooth-On's tutorials at https://www.smooth-on.com/howto/basic.... They cover more detail than I did here. ▶ I actually used the slow-curing version of Smooth-On's Onyx resin in this video, but it doesn't appear to be available on Amazon, so I linked to the fast version above. You can find the slow version at https://www.smooth-on.com/products/sm.... Either will work for this purpose. They just have different working times.



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XZ


ONTARIO

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Cool process, but unfortunately the links for the products is from Amazon.com
Trying to get these products north of the border will cost 3 times as much.

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DJD


SCARBOROUGH, ONT

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eah I figured it was good for reference at least

as for cost .. canada ..

sigh ...no need to say a thing as we're already all thinkin it as we read right now

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XZ


PRINCE EDWARD COUNTY, ONT

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I'd order them and have hem shipped to my border point. When enough orders accumulate, I'd go pick them up and pay the HST at the border. Usually little of no shipping charge, only the lop sided US$. Picked up 15 shipments last week and figured it saved me about $1000. What you're thinking has nothing to do with the cost of product shipped to Canada.

Warren



-- Edited by wuga on Thursday 14th of February 2019 02:06:42 PM

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DJD


SCARBOROUGH, ONT

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that would work well if I lived in fort erie but east scarborough / almost pickering - not so much

I try to avoid UPS & FED X as much as possible due to brokerage fees

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XZ
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