Mold Making: Basic Block Silicone Mold

Here's a set of block molds made using 71-20 silicone. This is an overview of the mold making and casting process.

Category:

Howto & Style

Tags:

• mold
• making
• silicone
• casting
• mould
• resin
• plastic
• rubber
• prototyping
• gears

[ozdesigne]

please can you tell me where can i get these product i want make center CAP from my car alloy wheels many thanks, leos-@live.co.uk

[brickintheyard]

@ozdesigne Go to 5:33

[bagofbones11]

What im wondering is how much times you can use these mods before they start to break and not work?

[brickintheyard]

@bagofbones11 A platinum silicone will not break down, but it will eventually loose its release properties and become "leathery" on the surface after repeated casting. Depending on the cross section of the part, the frequency of casting, and the type of resin used, the mold may last anywhere from 50 to 150+ castings. We have molds here in our shop that we have cast parts in them for years. Rapid, production casting w/o release is the fastest way to kill a mold.

[foxone1974]

is it me but @2.41 the cog parts have air bubbles..?

[brickintheyard]

@foxone1974 There was some grease on the original that transfered to the mold.

[ozdesigne]

please where can get 71-20 silicone?

[anonymusbob101]

I love watching resin cure. Such a cool process.

[brickintheyard]

@ninak982 Got to 5:30 :)

[Seventhsonofamaiden]

This is a good video. I have to make my own gear to my car's a/c bend flap actuator motor.