I'm in a quandry at the moment. I'm working with some two part molds that I'm going to use to cast crystal clear urethane. But one problem I'm encountering...
If you can, the easiest thing to do will be to coat the *master* in future and then recast the silicone mold. I assume the problem is that the master had...
Well, you see, here's the issue I ran into. And anyone can read this, I could use any and all advice, hehe. This is part of the Cygnus recasting project I...
I know exactly where you are coming from since I've encountered a similar experience when/while making some molds for clear parts. Not sure if it makes any...
AFAIK, there's nothing available to "buff" your silicone molds. They are too soft and flexible to 'buff'; all you'll end up doing is scratching them. Keeping ...
The ONLY reliable way to have super-shiny water-clear castings is to polish the heck out of your masters before you make your RTV molds. There is no other way...
Hi, After searching for specialised enclosures for electronic circuit boards, and not finding what I want, I'm starting to look at the option of casting my own...
It has been my experience that you cannot buff or put a release inside of your mold if you want crystal clear parts. If it is a true clear resin, the release...
Has anyone in the northeast recently approached a "local" company and had some castings made? I'm curious of the costs, provided I supply the pattern. ...
... Here's a bunch of sites with tutorials and videos: <http://www.alumilite.com/>www.alumilite.com see How To <http://www.bare-metal.com/>www.bare-metal.com...
Hi All, You need to stop the problem before it starts. I store all my molds in sealed plastic boxes, this keeps them clean. I also think it might lengthen the...
Years ago......... I was shown a clear plastic HO vehicle that was automobile polishing compound buffed to a mirror-like finish. The original was one of those...
Just a couple comments re your enclosures. The pdf drawing you showed appears to have been done in SolidWorks which I acquired in early Fall and taken a ...
I have an opportunity to get my hands on some small surplus Heater plates (elements) roughly 4.125 x 1.5 inch. They are rated at 115 Volt A.C. 140 Watts. They...
Hi everyone, new to the group and just wanted to introduce myself. Name is John, but go by 'JT'. I have been interested in learning how to do resin casting...
Hi all, I've uploaded an entirely new web site using the same domain name/address as before (see link below). It is a basic web site with a LOT of room to...
This may have been posted as an answer elsewhere, and I apologize if I am repeating a previous post, but I couldn't seem to find a good answer in the forums. ...
I have some EasyCast 60 Resin which is 18 months old, but I have kept it well sealed after each use. I am careful when measuring part A and part B so...
I guess you'll need a small to medium milling machine to mill the dies. You'd also need an injection molder. You can conceivably build something for stuff of...
Age isn't a likely problem in and of itself. Problem with any urethan is that it poiucks up air moisture when left exposed, which is why you need to seal it...
What is the groups opinion of cutting up old molds and using the remains to "pad" new ones? I have several molds which have become torn and worn, and I hate...
... Do a Google search for 'vacuum desiccator'. These PP/PC units start at around 50 dollars, and are well suited to casting. One exception could be if you use...
Jim, "cutting up old molds and using the remains to "pad" new ones?" For urethane you need to make sure any release is removed for the surface to prevent...
Jim, I have done this with several molds and have not had any adverse effects on the new molds. Depending on the size of the project it can save you quite a...
I also do this a lot. In fact, I grind up the old molds using one of those cast aluminum meat grinders. Works great and I get little pieces that fit nicely...
RTV does indeed stick to RTV, and it will save you money :-) Haven't done it myself, but have seen the results of others doing it, and also remember having to...
Ted, Many thanks. I have discovered the problem... ME! After using two syringes to accurately measure out small quantities of A and B, I then washed the...
I've been trying to make molds of some thin parts, typically 1/16" or so. While I have no real problem with the silicone rubber, I've had substantial problems...
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