Casting Resin for Parts

[mit]

[color=#000000]Hello all

Does anyone have any prefferences for casting Resins in use for model subs ?

For example]

[thordesign]

BJB Enterprises TC-810 urethane resin.

BJB Enterprises TC-810 urethane resin.

[mit]

Thanks Matt !

Thanks Matt !

[raalst]

maybe this link is useful

maybe this link is useful ]http://www.87thscale.info/make_resin_castings.htm[/url]



Edited By raalst on 1081887121

[dhffr]

BJB TC 808 is also

BJB TC 808 is also nice. I have used it at work for the last 6 years. Can be demolded in under an hour if the part is thick enough for proper exotherm temps. Make sure you pay attention to the shrinkage rates if you are using it for endcaps. I know that some of the "gold" casting resins have up to 24 thousandths of an inch shrinkage where the TC 808 only claims 4 thousandths. This makes a huge difference when you turn endcaps. Go with the 808 or 810. Also, the 808 is white and can be tinted to a nice black, red or anything you want. BJB has the tints. That way you can color the appendages similar to the finished hull color so the scrapes dont show up as much.

[dietzer]

I went to BJB's website,

I went to BJB's website, and could not find any reference to TC-810, even with their search engine. The TC-808 is there, but not the TC-810.

Has the TC-810 been obseleted? If so, what's its equivalent?

Here's the link to the TC-808 page]BJB Enterprises, Inc. - Rigid Filled and Unfilled Urethanes[/url]

BTW, is this stuff cheap enough for us simple end-users to play with? (I can't find any prices, just that the min order is $75.) Can I mix it by hand, or do I need to buy their manual dispenser?

Carl



Edited By dietzer on 1082045047

[dhffr]

You can mix it by

You can mix it by hand and I have sucessfully mixed it by volume or weight and even by eye. This stuff is pretty forgiving. I have actually slosh cast a quarter scale conecpt car by pouring an entire gallon kit into a mold and used 5 guys to roll it until it hadened (about 5 min). Also a great way to make a sub tool to scribe details in and prepare for final molds. I use this on all my appendages. It is very easy to sand and dosent need de-airing. Buy a kit and some pigment. The basic white makes it hard to judge surfaces. I recommend coloring the entire part A (white part) before mixing any. That way all of your parts will match.

Hope this helps

Darrin H

[dhffr]

I looked at the BJB

I looked at the BJB website link and saw the TC 1642 below the 808. We also use this but It is much more porous and has a H U G E odor. We use it to make tires on scale concept cars. I would stay away from this product as it is vey thick and dosent fill into small crevises.

Darrin