Who knows stuff about foam rubber? - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Lounge For casual talk about things unrelated to General Motors. In other words, off-topic stuff. And anything else that does not fit Section Description.

Reply
 
 
 
Thread Tools Search this Thread
Old 11-28-2004, 03:10 PM   #11
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

Too bad you don't have access to me toys at work

Cutting forms with a laser would make it very easy. Out of any material you want.
willwren is offline   Reply With Quote
Old 11-28-2004, 03:29 PM   #12
Senior Member
True Car Nut
Thread Starter
 
Join Date: Feb 2004
Location: Western MA
Posts: 2,708
Thanks: 0
Thanked 1 Time in 1 Post
randman1 is on a distinguished road
Default

You lucky devil, you. I'm doing this Amish-style compared to your resources.

That would be nice to have access to hi-tech lazer equipment. Man... imagine the possibilities...
randman1 is offline   Reply With Quote
Old 11-28-2004, 03:31 PM   #13
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

You can cut and shape the foam with the laser as well. Works great. Ultimately, I think your best results will be achieved by forming the vinyl to the original emblem using heat, then maybe spraying some sort of stiffener on the back, then filling the void with silicone.
willwren is offline   Reply With Quote
Old 12-08-2004, 03:20 PM   #14
Senior Member
True Car Nut
Thread Starter
 
Join Date: Feb 2004
Location: Western MA
Posts: 2,708
Thanks: 0
Thanked 1 Time in 1 Post
randman1 is on a distinguished road
Default

I had to get some help from Hollywood on this one. My brother'* girlfriend used to do graphics work for some movie studios in CA. I asked her to call up some friends in the special effects department to see if they could give me some help. They led me to exactly what I was looking for. Liquid foam...

It comes as a two-part kit that is mixed 1:1 by volume. I also bought a release agent that didn't seem to work very well. Here is parts A & B ready to be mixed along with the plaster mold:
Name:  DSC01219.jpg
Views: 2
Size:  28.1 KB

Here it is after 10 minutes in the mold. The foam is self-skinning and expands 6 times in volume.
Name:  DSC01222.jpg
Views: 1
Size:  27.3 KB

Here is a cross section of the unused portion that was removed from the cup. The density of the foam is rated at 10lbs/sq foot although it does seem to be denser than that:
Name:  DSC01224.jpg
Views: 2
Size:  37.0 KB

The release agent sucked. It was more difficult to remove the foam from the plaster mold (which received a coating) than it was to remove from the cup. Some of the detail and sharp edges stuck to the mold but overall a sucess for the first run:
Name:  DSC01225.jpg
Views: 1
Size:  34.3 KB

I've already sent the door panels to be embroidered because I wasn't completely happy with the results. Since I think the foam will work well for this application, I'm going to continue to refine the process.
randman1 is offline   Reply With Quote
Old 03-01-2005, 11:05 PM   #15
Senior Member
Posts like a Corvette
 
Join Date: Jan 2003
Posts: 1,250
Thanks: 0
Thanked 0 Times in 0 Posts
bmsgaffer86 is on a distinguished road
Default

I am only bringing up an old topic because i want to know how it turned out? Did you finish? did it look how you wanted?
bmsgaffer86 is offline   Reply With Quote
Old 03-02-2005, 10:10 AM   #16
Senior Member
True Car Nut
Thread Starter
 
Join Date: Feb 2004
Location: Western MA
Posts: 2,708
Thanks: 0
Thanked 1 Time in 1 Post
randman1 is on a distinguished road
Default

The foam mold actually came out pretty well but I wish I sealed the surface of the plaster before starting. The foam really stuck to the plaster and the shapes weren't as sharp as I'd hoped. I got a little impatient to do the door panels but wasn't totally satisfied with the whole imbossing results. So I decided to go with embroidered door panels instead.

Name:  DSC01314.jpg
Views: 1
Size:  50.9 KB

Maybe one day I'll fart around some more. One thing I wanted to try is to repair a worn seat bolster foam as I know that this can be a problem with our cars. I went so far as to tear out some foam from a spare seat but have not tried to fill it in yet.

There are lots of possibilities with liquid foam rubber. I just lack the creativity to come up with something unique using the stuff. It'* really cool to watch it expand too.
randman1 is offline   Reply With Quote
Old 03-02-2005, 10:30 AM   #17
Senior Member
True Car Nut
 
Join Date: Apr 2004
Location: Three Oaks, Michigan
Posts: 4,879
Thanks: 0
Thanked 0 Times in 0 Posts
opensourceguy is on a distinguished road
Default

Like everything else you have done, some badass work there. I think I like the "Bonneville" lettering better than the emblem [would have been]. Just seems to flow, you know?

Speaking of repairing seat foam.. how can do you that? My driver'* seat is pretty dead.. but I fear if I replace it, it won't match the rest of the leather on the car. All the material is there, and if I stretch it out some, I am sure I could sew it back up [me mums got a HD Sewing Machine.. this thing sewed up my entire Slip Cover for my couch in just a few hours]. However the problem would just re-occur because of the foam being worn out, to the point it is just metal under there.


-justin
opensourceguy is offline   Reply With Quote
Old 03-02-2005, 02:01 PM   #18
Senior Member
True Car Nut
Thread Starter
 
Join Date: Feb 2004
Location: Western MA
Posts: 2,708
Thanks: 0
Thanked 1 Time in 1 Post
randman1 is on a distinguished road
Default

I have a theory that the 2-part mixture can be brushed onto a foam cushion to fill in voids and perhaps reshape all together. There is a short working time once the two parts start reacting so I figure that one could mix 1-2 oz of each part, stir for 45 seconds, then brush, brush, brush. Anticipating the amount expansion would be the tricky part so I thing layering would be the best.

I'm still in home improvement mode which has not left much car time. I might be able to get back to you with some results in a couple of days.
randman1 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
I need someone who knows bout this stuff ChiTownRiv General GM Chat 11 11-16-2007 08:08 AM
Who knows stuff about GPs with the 3.4? wjcollier07 Lounge 11 04-16-2007 09:17 AM
Jim W knows his stuff... Logan Lounge 17 01-20-2006 05:14 PM
Sea foam fantastic88 General GM Chat 19 05-29-2004 06:48 PM
Sea Foam? JimmyJames83 Detailing & Appearance 7 04-29-2004 07:10 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 11:53 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.