How to make a two-part mold

This video segment will show you how to make a simple two-part mold using Urethane RTV molding rubber.

Category:

Howto & Style

Tags:

• tap
• plastics
• two-part
• mold
• molding
• urethane
• rtv
• mold-making
• rubber

[XxWantedSnipexX]

Hey tap plastics I would like to start making castings for older dodge trucks out of a clear resin, how would or what would I need to make a pair of taillights. How do I melt the plastic ect. I have no prior exp

[tapplastics]

@XxWantedSnipexX Assuming you have an original tail light to duplicate, make a mold of it following the procedure described in the video. Once the mold is complete, the new tail light can be made with Clear Lite Casting Resin. It is a liquid that you pour into the mold. It will harden (assuming all the directions are followed) producing a duplicate tail light.

[tapplastics]

@XxWantedSnipexX Dye can be added to the liquid resin before pouring to create a matching color. For more casting information watch our videos about casting resin.

[MrMjfury1]

If I wanted to make a small ice replica of an action figure, what would you recommend? I know I would need to use a 2 part mold but will the silicone or urethane warp when frozen?

[tapplastics]

@MrMjfury1 We have not tried freezing the mold, but see no reason why it should warp.

[blckjade05]

Hello, I have a couple of question:

The level of importance on what is needed is:

Transparent <--this is a must - it is the highest priority on my list.

Impact resistance <--Needs to be able to absorb shock 2nd priority

Flexible <-- to help with the shock

I need whatever material that is selected to be 1/10th of a mm thick

If silicone cant do what is needed, what would be a good alternative to get the above properties out of a material?

[tapplastics]

@blckjade05 Our clearest material is TAP Clear Lite Casting Resin. It has good impact resistance, but limited flexibility. The biggest issue is the thickness. 1/10th of a mm is about the thickness of a piece of paper. We do not have a casting material that would be impact resistant at that thickness.

[MrsKittenHyuuga]

Where should the pouring hole be placed if there is no base?

[tapplastics]

@mitchabusa1 Aluminum melts at above 1200 degrees F. I know of no flexible mold material that will stand up to that temp. Artists (who require great detail) use ceramic through a multi-step process. They make their original out of any material. Make a rubber mold of the original. Fill the mold with wax. Then coat the wax duplicate with ceramic. It is baked, the wax melts out, then the ceramic mold is used for the metal casting.

[DragoonProp]

These are so helpful, you have no idea how much.

[tapplastics]

@sirfrunky TAP Quik Cast, available at our website.

[tapplastics]

@DemonWeasel1990 The mold would be made using the same techniques described in the video. Then for the casting, look at the free instructional video on casting at our website

[tapplastics]

@TheSkyhazFallen The other option would be to use TAP Quik Cast. Pour some in the mold, then rotate the mold, coating the sides, until it cures. TAP Quik Cast only requires about 5 minutes to cure. This would be an imprecise method, but could work without the need of an inner and outer mold.