A question was asked a few days ago about how to clean off clay from a master when trying to prepare a 2-part mold. This question was never answered that I...
6974
Countryside Models
birdhaus1@...
Mar 5, 2001 5:26 pm
Craig and all... I've used Klean Klay for the clay bed when making molds of platinum cure RTV. I peel away most of clay by hand and with rounded/blunt plastic...
6975
Skyflight
Skyflight@...
Mar 5, 2001 10:12 pm
... My question about pressure casting is, what does it do for bubbles trapped on the surface of the mold? IE, ones that would leave a big visible hole in the...
6976
pacm_ca@...
Mar 6, 2001 12:07 am
Rod, I gave it a shot last night on a small flat mold and used a clear piece of waxed plexiglass like I would do without the chamber. This time I put in into...
6977
Rod Guthrie
rod@...
Mar 6, 2001 12:33 am
Allan... Yes good idea....vertical chamber works OK ...but not too practical. So laying it over on its side is what I have done for years......I use a piece of...
6978
Tom Banwell
tom@...
Mar 6, 2001 1:37 am
... In my experience, the pressure pot will eliminate any bubbles left in a well-designed mold. If a large air bubble is getting trapped than I suspect you...
6979
Paddy Drury
paddy.drury@...
Mar 6, 2001 9:06 pm
... master when ... It was myself who asked the question. I tried my first casts and was very disappointed about getting the clay off. In the end I did...
6980
Gene Halder
reman@...
Mar 6, 2001 10:07 pm
Hello: I would like to get some input on some of the things my fellow casters use as backing when making two parts molds. To date i have always just used the...
6981
Pat Lawless (Miracle ...
pat@...
Mar 6, 2001 10:28 pm
Hi Paddy! Your idea should work, as long as the shape and weight of your master allows it to stay put, but you will find that the RTV forms what's called a...
6982
paddy.drury@...
Mar 6, 2001 10:55 pm
... your ... what's ... surface. You ... you'll have a ... Hello Pat From my schoolboy science I seem to recall Meniscus and it haveing to do with surface...
6983
paddy.drury@...
Mar 6, 2001 11:05 pm
... casters use as backing when making two parts molds. To date i have always just used the silicone that i was making the mold with an filled it to the depth...
6984
Craig Bisgeier
cbisgeier@...
Mar 7, 2001 12:27 am
Thanks Ed. I stopped at the craft store on the way home. They did not carry Klean Klay, but I was able to find a non-hardening plastilina clay that contains...
6985
Graham
greytrainz@...
Mar 7, 2001 6:17 am
having read the problem, try to laeve 1/4" of the rubber exposed. that way you can still get the preasure you require. hopfully this idea will work for you. ...
6986
WBa2485811@...
Mar 7, 2001 9:23 am
Hello I recently posted to the list a question for help,but i am not sure the it came through as i got no answers or feed back. I am looking for some one to...
6987
M. Gottschalch
megott@...
Mar 7, 2001 1:18 pm
Not know much about this I'm going to make a fool of myself. Why wouldn't it be possible to make a plaster mold with two halfs and locating pins, But have a...
6988
Craig Bisgeier
cbisgeier@...
Mar 7, 2001 5:33 pm
Folks, I am hoping some of you might have some advice for me on how to build the two-part mold I need for a project I'm working on. The master can be seen at...
6989
Graham
greytrainz@...
Mar 7, 2001 7:21 pm
hi looked at the gondala, a two piece mould should be speperated at the top of the sides. (that way you can lay it flat onto some clay,upside down, without...
6990
Graham
greytrainz@...
Mar 7, 2001 7:24 pm
could possibly help, have been creating coaches in plastic, and i am going to make a vacum moulding box this weekend. would love to be able to help the only...
6991
PAbbott@...
Mar 7, 2001 9:57 pm
g'day William, Have you considered doing it yourself - I found it easier to master than making good molds and resin casting! The equipment can be fairly basic...
6992
Stuart Mitchell
auzze@...
Mar 8, 2001 1:24 am
Hi.. I wish to mold some boxcars, but do them as one peice, how do make a mold so I get it hollow. I been using Easy-Cast, works OK.. Stuart Mitchell [Non-text...
6993
Yuji Kuwabara
HHG01200@...
Mar 8, 2001 2:38 am
Hello Gene, I read about this topic on a book. He embedded "hashed" "used" RTV silicone rubber. Same product should be used. I have not tried this yet. ...
6994
Pat Lawless (Miracle ...
pat@...
Mar 8, 2001 4:32 am
Hi! I forwarded your message to a friend of mine who has a vacuum former. I'm not sure if he's been using it for commercial parts or not, as he's primarily a...
6995
Pat Lawless (Miracle ...
pat@...
Mar 8, 2001 4:37 am
Hi Manfred! Actually that wasn't a stupid question at all! What you've described is known as a "mother-mold". The easier way of producing one though, is to...
6996
Doug McClure
dmclure@...
Mar 8, 2001 11:28 am
... From: Yuji Kuwabara <HHG01200@...> To: casting@yahoogroups.com <casting@yahoogroups.com> Date: Wednesday, March 07, 2001 9:38 PM Subject: [casting]...
6997
M. Gottschalch
megott@...
Mar 8, 2001 2:20 pm
Thanks for the info Pat. -- Manfred...
6998
Craig Bisgeier
cbisgeier@...
Mar 8, 2001 2:44 pm
For those of you that have used Legos as mold box dams: I'm looking at doing this for my next project. But it seems as though the gaps between the blocks are...
6999
Kent Kinal
kinalk@...
Mar 8, 2001 2:47 pm
Craig, I usually do not have to seal the blocks themeselves, I don't get any leakage there. The one place you do have to be careful of is where you set them...
7000
Kris Southerland
siege@...
Mar 8, 2001 3:20 pm
Depending on the size of the gap I sometimes use scotch tape. Other than that Legos are a very adaptable system Kris Southerland Siege Engines Ltd. ...
7001
patv@...
Mar 8, 2001 4:27 pm
The Legos I use are cheap knockoffs and I have minimal leakages. When it does leak slightly, I get a thin, 0.001" "flash" where the RTV creeps into the gaps....
7002
Rick Blanchard
rick@...
Mar 8, 2001 6:10 pm
For those of you who are Lego impaired, I usually use scraps of styrene for my molds. I use strips that are tall enough for the item I am casting and longer...
