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Mold Making - Mass Casting Complex Parts (w/ parting line)

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Uploaded by on Oct 12, 2006

When mass casting a part without a flat side, you must create a two-part mold. We create a two-part silicone rubber mold with a clean parting line and then cast the part with Repro.

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Uploader Comments (freemanmfg)

  • Please contact Freeman Manufacturing & Supply

  • why didnt you use clay for the bottom, instead of the wood? Yuo could've used plasticine clay for the base built up around the model

  • Clay wouldn't create a straight parting line. A future video will show the clay technique on a very irregular shape, but this project required a straight parting line, and therefore, we used wood.

Top Comments

  • very good tutorial. I have been on the internet for a couple of days now searching for molding and re-fabricating. However i have a question, I am thinking of re-fabricating an old tail light of a vehicle, what kind of plastic will i need to use for the lens? does anyone know? hopefully someone could give me an answer on this. thanks

  • Chances are the horse was cast from a mold. Use a magnifying glass and try yo see where the original mold lines ran. Because of the many undercuts the horse may have been made from even a 3-part mold. Two halves per side and a third section that went between the legs. You can use clay to fill between the legs, make the two outer halves, remove the clay and cast that part last. Use a flexible silicone for deep undercuts.

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All Comments (46)

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  • @myrainywoods So people would click on it and watch the updated version of the video rather than the older version.

  • You shouldn't cut towards yourself. Away is the way.

  • These videos are fantastic, thanks. Do yall have any videos on how I could mold and cast something like a pipe, though?

  • WHERE CAN I BUY CASTING SILICONE TO MADE MY OWN MOLDS?..THANKS.

  • Oh that sux!! Google too is an excellent resource :P

  • Should have checked youtube first, genius.

  • can i buy your products in Italy?

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