HW, It was a few years back I think near the start of when Yahoo took over this forum. I too sorta abandoned permanent molds but am going to try again as I...
35032
ken durstine
kdurstine
Jul 29, 2005 12:40 am
... Well, beat me with a brick. I went out on the net and you are right. Sorry about putting out a bad story. The way I heard it ( obviously wrong) was that...
35033
Mario L Vitale
chippuller
Jul 29, 2005 1:08 am
It seems unlikely that Chevy 'stole' the design from Opel, since GM (who owns Chevy) owns Opel. Interesting how these tales originate and spread... one of the...
35034
Col Croucher
colincroucher
Jul 29, 2005 2:30 am
Hi Fellas. Permenant moulds are an excellent way to cast alluminium, providing you want to make several parts. I have cast pistons using this method and the...
35035
tl_atx
Jul 29, 2005 2:30 am
Hi Ken, That's okay, I'll put the brick down :-) I haven't heard of the Opel story. Obviously Chevy departments didn't talk to each other. I remember that to...
35036
Stone Tool
owly055
Jul 29, 2005 2:50 am
Lyle: What sort of permanent mold material do you have in mind? Bronze would be convenient for molding aluminum...... I presume it stands up reasonably...
35037
Dick Morris
rmorris200
Jul 29, 2005 3:58 am
Such as was used in the early Crosley engines which were brazed fabrications?...
35038
dan Brewer
danqualman
Jul 29, 2005 4:45 am
Teri, Keep the metal out of the refractory. It has a different heat coefficient than the refractory and will cause it to crack. The only things I have seen...
35039
lrisen@...
lrisenhoover
Jul 29, 2005 12:00 pm
the most important thing i have found is...... mass...... if your furnace lining has alot of mass (is heavy/dense) you must heat that mass before the temp in...
35040
lance dulak
lancedulak
Jul 29, 2005 12:36 pm
What materials do you use for the permanent molds? It would be Fantastic to find a castable mold material for aluminum (NOT any form of plaster! what a pain). ...
35041
jim davies
appeaser2002
Jul 29, 2005 1:16 pm
Opel is, and has been for decades, owned by General Motors......
35042
tl_atx
Jul 29, 2005 1:17 pm
Hi Dan, Thanks for the suggestions. I'll leave the metal stucco lath out. I was thinking of using real 3000 deg F refractory available at the local...
35043
Stone Tool
owly055
Jul 29, 2005 1:25 pm
As I recollect, only the water jacket was brazed on........ Not a bad idea at all except that they rusted out rather quickly. They were an interesting design...
35044
geoff herguth
herguth46
Jul 29, 2005 10:23 pm
Does anyone know of a source for small quantities of the steam activated, granular resin which produces the foam that coffee cups and packaging, etc. are cast...
35045
Stone Tool
owly055
Jul 30, 2005 1:58 am
I was going to send this post privately... but perhaps there are others interested in this topic. Here are search results using Copernic.... some of which I...
35046
geoff herguth
herguth46
Jul 30, 2005 1:49 pm
Good job. I've checked a few of these, Nova in particular, they sell the stuff by the gaylord. 1 pound of resin would probably last me a year. Maybe some of...
35047
lance dulak
lancedulak
Jul 30, 2005 3:26 pm
You might try to talk to a salesman or manager at the company and get a sample. Or ask if they have a customer near you so you could buy some from them (im ...
35048
lance dulak
lancedulak
Jul 30, 2005 3:49 pm
Just a thought. In boat building (for yacht sized boats) they use an expandable foam for buoyancy. Here is one link: ...
35049
Daniel C. Postellon
dpostellon
Jul 30, 2005 5:00 pm
Isn't this two-part stuff polyurethane? If so, I would avoid it as producing toxic gases . ... From: "lance dulak" <lancedulak@...> To:...
35050
lance dulak
lancedulak
Jul 30, 2005 6:03 pm
Im not sure but there are two different kinds. One is two part and probably polyurethane. I know theres another kind (the kind i was actually looking for) that...
35051
Stone Tool
owly055
Jul 30, 2005 6:37 pm
Polystyrene is the only foam suitable for this purpose, and it is not available as a two part product. The product needed here consists of tiny particles that...
35052
Frank Hasieber
fhasieber
Jul 30, 2005 6:50 pm
The beads are usually heated by injecting steam into the mold containing the
beads.
Frank.
-----Original Message-----
From: hobbicast@yahoogroups.com...
35053
wrpa
rudy_216
Jul 30, 2005 8:37 pm
... Anyone know of any web pages of DIY EPS equipment?...
35054
D Cranston
dennisintexas41
Jul 30, 2005 9:24 pm
There used to be sites offering EPS beads and duck decoy molds. Also there was a site catering to schools that sold plastic injection units and plastic pellets...
35055
lance dulak
lancedulak
Jul 31, 2005 1:16 am
I was thinking of latex foam apparently. Which even if it werent a two part foam stays pliable even when wet so just wouldnt be useful. ... ...
35056
cdmckeown
Jul 31, 2005 12:31 pm
G'Day fella's Just finished the build of a large cast iron furnace. Check it out at http://home.iprimus.com.au/cmckeown/foundry.htm Look under oil fired...
35057
Chris Bailey
cbailey73160
Jul 31, 2005 1:05 pm
slightly off topic here, but take a look at this site. I wonder if any of this would be good for making molds or patterns from?? ...
35058
lance dulak
lancedulak
Jul 31, 2005 1:12 pm
I love your site. Had it bookmarked for quite a while. I especially like the blower casing you cast. (Curious about what you used to get that finish). Ya...
35059
wrpa
rudy_216
Jul 31, 2005 3:39 pm
A Design Study in Aluminum Castings - GM Cylinder Block http://www.sfsa.org/tutorials/eng_block/GMBlock_15.htm ...
35060
Daniel C. Postellon
dpostellon
Jul 31, 2005 5:20 pm
Is anyone headed to the Herman iron pour this year? Care to meet me there? Dan...
