34 replies to this topic

[Gene/ZR1]

ROUND NO.1

a how to;

I was asked by a Slot Blog member and tin model donor, to give this a go,so here we go!

 

 

object;  take a 1945 or so toy tin sprint car, Germany U.S. Zone and turn this into a slot car body

 

Will need a lot of clay, this machine will roll it out at 1\8" thick.

[Gene/ZR1]

ROUND NO.2

 

You need to pack inside tin shell with clay to seal a holes, so when you make the silicone mold it does not leak inside of the tin shell.

 

 

You can how the clay is push to the outside sealing off all openings

 

 

 

[Gene/ZR1]

ROUND NO.3

 

Clay work base to start bottom profile seal

 

Continue with the bottom seal profile

 

[Gene/ZR1]

ROUND NO.4

 

Continue to shape bottom seal.

 

[attachment=147531:20171013_131811602_iOS.jpg

Front end under grill takes shape, this is the time to make clay adjustment as needed, remember you have to remove the PETG plastic from the mold, from here need to finish up.

 

stand by. g; 

 

Attached Images

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[Gene/ZR1]

 

taking a break, will finish up monday

 

gene and Lucy

[Lone Wolf]

I will follow this one for sure.

 

Art Clokey would be proud of that clay work 

 

 

Not sure how that next batch of pasta is going to taste though 

[olescratch]

Step-by-step mold making at it's best!  Teach on!

[Gene/ZR1]

ROUND NO.5

 

 

The bottom clay perimeter seal is complete and a spray of mold release.

[Gene/ZR1]

ROUND NO.6

 

 

Assembly of box to place mold silicone in.

Latex caulk to seal box to prevent leaks of silicone.

 

 

[Gene/ZR1]

ROUND NO.7

 

 

An  inexpensive pin nailer used to hold box together, pin nails do not have a nail head, so you can just pull the box apart with ease.   

[Gene/ZR1]

ROUND NO.8

 

 

Silicone mix, its like mixing snot and STP, sticky, messy no matter how careful you are.

Disposable gloves are a must.

 

 

wow!, was able to get 2 photos this time.

When you pour the silicone let it stream down slowly and self level.  

Do not pour the silicone on the mold. Let the silicone chase up against the mold preventing air pockets. 

[Gene/ZR1]

ROUND NO.9

 

 

Silicone all placed, cure time approx. cure is 5 hours.

Time to clean up the mess.

 

 

[SlotStox#53]

Superb step by step/how to, watching with much interest & bookmarked for future reference & having a go

[Gene/ZR1]

ROUND NO.1O

 

Now lets peel back the clay that was used for the bottom perimeter seal.

 

 

With the bottom seal removed you can see the bottom of the tin race car.

[Gene/ZR1]

ROUND NO.11

 

 

Bingo !, tin car popped out clean, and the silicone mold looks great.

 

 

Now a couple of sprays of mold release, now for mess no.2 mixing up the resin.

 

 

 

[Gene/ZR1]

ROUND NO.12

 

 

Lets get this poured, again pour the resin into the silicone mold in one spot slowly  letting the resin to rise filling the silicone mold.

 

 

Let the resin self level,,we will check curing in an hour for de-mold time.

 

 

[Gene/ZR1]

ROUND NO.13

 

 

Well, here's what we waited for the resin plug that will be used to pull bodies from.

Vacuum draw holes need to be drilled in various locations 

 

 

Both sides look good.

 

ok, thats it fur now, will finish tomorrow, have to go to pet smart. 

[slotbaker]

Excellent stuff, thanks for sharing.

Do you get any/much shrinkage from either of the 2 casting stages?

Just curious, what are the overall lengths of the original tin master, and your newly cast plug?

[Gene/ZR1]

Excellent stuff, thanks for sharing.

Do you get any/much shrinkage from either of the 2 casting stages?

Just curious, what are the overall lengths of the original tin master, and your newly cast plug?

 

No shrinkage. but I will measure.

[Samiam]

Gene,

 

Nice job. You took a 60 yr. old German tin toy and made it into something new. Thanks for turning my vision for this car into a reality.

 

From a post war "American Zone" made toy into a 21st. Century toy race car body. I'm stoked.

[Gene/ZR1]

Gene,

 

Nice job. You took a 50 yr. old German tin toy and made it into something new. Thanks for turning my vision for this car into a reality.

 

From a post war "American Zone" made toy into a 21st. Century toy race car body. I'm stoked.

 

Tomorrow morning I will pull a body, hope it turns out good.

[don.siegel]

Great tutorial Gene - at last I really understand the process! 

 

But as Maynard G. Krebbs used to say, that looks suspiciously like... "Work!"

 

Don 

[Gene/ZR1]

ROUND NO.14

 

 

Had to use the end mill to make a deep cavity so vent holes could be drilled. Drill bits to short and would seize and break off in the mold.

 

 

You can see numerous vent holes drilled

 

Getting very close now to the objective.

 

 

 

 

[Gene/ZR1]

ROUND NO.15

 

 

BINGO !, we have a body!, see nothing to it.

 

 

Nice looking little car.

 

Remember the body as shown is no better in detail than the original stamped tin car body, it was a copy.

What detail was in the original stamped tin car body is in the clear body. The original stamped tin car body had flaws from die stamping and are reflected in the repro. (what you see is what you get)

Overall this will build into a good looking race car. 

 

 

 

 

 

 

[Gator Bob]

Outstanding Gene !!!