Cast Parts Fast Using Tree Molds And Gang Molds

What is a tree mold and what are they used for?


A tree mold is a way of arranging multiple parts into a single easy to cut and cast silicone rubber mold. In this video I demonstrate how to group parts together into a tree mold with the correct sprue and vent layout to ensure successful casting. You can group tree molds together into a gang mold to quickly cast lots of urethane resin parts.

Thanks to Silpak for providing the silicone rubber used in this video. I gave an incorrect product number in the video; the material is Silicone RTV R-3700-20.
Check them out at:
www.silpak.com

Here is a list of suppliers for the rubber, resins and waxes I use in my videos:
https://www.dropbox.com/s/kz6mhmf7v5v...

Do you have a project to suggest for the channel?
Here’s a .pdf with everything you need to know:
https://www.dropbox.com/s/pjb0l6fr7zj...

TIME STAMPS
00:00 How not to cut wooden beads in half :)
01:53 What is a tree mold? Attaching the parts to a center sprue.
03:28 Waxing the mold cases.
04:05 Attaching the vents to the parts.
06:05 De-airing the rubber and pouring the molds.
08:03 Opening the mold cases and cutting the molds.
10:39 Building a mold cradle and why a mold case is not a mold cradle.
13:08 Mixing and pouring resin.
15:03 Into the pressure pot to suppress bubbles!
15:37 Opening the mold and evaluating the parts.
17:04 Making a simple gang mold.
18:57 Assembling tree molds into a gang mold.
19:48 Hit that like button and thanks for watching!