60 replies to this topic

[Lownslow]

finally casted the 70 1/2 B/M Camaro tires, i used the tip someone gave me on there to making a seamless tire. i forgot your name but thank you it made a world of difference. forgot the where the wheel came from but it was lying around half molded i think it was a beemer wheel

Edited by Lownslow, 11 March 2012 - 06:06 PM.

[RyanSilva]

Glad it worked for you Frank!Your tires look great! I did the same myself a few months ago.

[sstacey47]

Are you going to offer them for sell?

[Lownslow]

yea in due time

[sstacey47]

Put me in for a couple sets,working on old musle cars i owned and need some tires.I tried to cast some just can't seem to get them right.

[Greg Wann]

Are they made from soft rubber resin or are they regular hard resin painted black? If they are of a rubber resin, what did you use?

[Lownslow]

first 10 sets are gonna be hard tan resin, ill make soft ones after that once the stuff i ordered from cnaid shows up

[Greg Wann]

What company is that? Can you post a link? I'm looking for some other brand of rubber resin to try.

http://www.aeromarineproducts.com/

I bought some concrete mold making and stamping rubber from the link above but waited till it's experation date before I ever got around to using it. I buy my silicone in a 44 pound kit from them.

Edited by Greg Wann, 20 February 2012 - 09:47 PM.

[RyanSilva]

Greg, Try polytek PT Flex 50, I use it for all my tires. its a casting rubber rather than a molding rubber so the viscosity is about 600! which for a rubber that is thin. I can pour tires and demold them in 45 minutes.

[shucky]

Frank, those look great! Nice job as usual. FYI I've used the Alumilite 'flex' series of varying duro and while they work well they seem to be hit or miss for me. Biggest issue so far is shrinkage of the replicated tires over time. Not sure why this happens as the tires are the same size as the masters for at least a month or two but I have some that have been sitting for up to a year and they are 40% (no joke) smaller than the master now. I'm glad I never put them on a model lol. I had great luck with BJB F70 which is also as thin as what Ryan is talking about with viscosity of 620 and zero shrinkage.

Edited by shucky, 21 February 2012 - 07:08 AM.

[Greg Wann]

Greg, Try polytek PT Flex 50, I use it for all my tires. its a casting rubber rather than a molding rubber so the viscosity is about 600! which for a rubber that is thin. I can pour tires and demold them in 45 minutes.

Thank you, Ryan. I really appreciate the information.


http://www.polytek.com/

WOW! The stuff is expensive! Looks like it needs a dye too. What do you use for a dye? What is your mix for the added dye?

Edited by Greg Wann, 21 February 2012 - 09:19 AM.

[RyanSilva]

It is pricey...but the way I see it, I spend the money and buy the 16lb kit (im on my 3rd one) a typical tire weighs about .20 ounces, so I can get 5 tires to 1 ounce. Also if you dont want to order from them directly (they are in Pennsylvania) get it from "brickintheyard mold supply they are in texas.

I used there dye..but I used smooth-ons and saw no difference, but thats only my experience.

To be honest I dont have a ratio, lol...I just squeeze it into the 1 gallon jug, get a real good mix and test its clarity, if it still looks clear green i will add more dye till its not as translucent.

[imatt88]

Frank,

Let us know when your tires are for sale. I could use a couple of sets myself

Cheers, Ian

[Greg Wann]

I found a supplier here in Tempe Arizona. I called them and placed an order. Thanks for the help.

[Lownslow]

getting pretty close

Edited by Lownslow, 21 February 2012 - 07:57 PM.

[Monty]

Frank, IIRC, the tire you're casting was only available in that size from AMT & generally intended for the rear axle. Have you considered cutting a few sections out of the middle of that tire, popping it back together and making a slightly skinnier tire we can run up front?

[Lownslow]

its crossed my mind before but i lack the skill to do so

[Monty]

its crossed my mind before but i lack the skill to do so

Would you consider it if someone with that kind of experience did all the surgery for you? It sounds like there's some demand for a matching front M/T tire out there...

[Lownslow]

shoot me your info and i mail one out your way

[Monty]

shoot me your info and i mail one out your way

I've seen the techniqe demonstrated in a magazine, but I haven't done it myself. I was asking the question in case one of our more experienced modelers wanted to collaborate with you on this.

Any of you have extensive experience in tire surgery? If you have the ability to take a few sections out of the M/T tire & put it back together seamlessly, Frank might be able to cast 'em up so we can have matching M/T tires on our car.