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Pascal

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This will be a slow build. I want to try to make a rubber mould and cast resin.

 

The kit that I'll be using is this one, a cartoon, cute version of the Porsche 962  :

 

dd28d855101f560666fadbef309e0cb5.jpg

 

The brand is Mitsuwa (long time out of production, company doesn't exist anymore), the kit is one from the Mid Racer Collection series.

 

It's a "no-scale" kit, the finished model is +/- 9 cm long (which puts it in the 1/43 scale category I think).

 

Basically it's a toy that has a "pull-back" spring-loaded motor so you can make it run. In it's hayday Mitsuwa even produced a track to run these kits on.

 

Sadly these kits have become hard to find and are quite expensive for a toy. I bought mine years ago for 8 euros, now they go for 40-60 euros.

 

I have another kit from the same series. It's boxed as a Porsche 956, but it's the same kit as the 962.

 

In the box you'll find very few parts, the kit kan be snapped and screwed together :

 

eba36f14226064d77d326f6b2839bb45.jpg

 

Now what I want to TRY is : add some details to the body - like opening up the NACA ducts, fill the inside of the body with clay, make a 2-part rubber mould and cast resin copies of the body, have a go

 

at vacuforming the windows, and build some cute 956's and 962's.

 

Why ? because I'm very fond of these cute Porsches and I want to build a bunch of them.

 

Inside of the body :

 

e4ef16abdd17d08b41b88f3f619564a7.jpg

 

Topside :

 

d30787f487112b3a6e1adf67e9622031.jpg

 

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First thing I did was remove some unwanted plastic and open up the naca ducts and openings for the radiators :

 

28aef9b3d248a78a2014f5e29b2914e8.jpg

 

83ea4f44c85e56c6779bd8fde5c7cf7d.jpg

 

Had to take a few photos with the body on the tires. Oh yeah, real CUTE :

 

63b6fd871a74d2c892cee014d289d2c4.jpg

 

e67e0558c4857bd4c1583330e1dfc075.jpg

 

I think that I need to remove the large wing at the back before I make the mould ?

 

The rubber and resin products have arrived today, I'll post some photos later.

 

Was thinking of making a box with Lego's.

 

Please feel free to comment. I've never used rubber nor resin for casting before, I need all the help I can get.

 

Sincerely

Pascal

 

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I can't help you with any advice on casting resin or making moulds but I'm still interested in following along because of the subject matter.

 

I've got a couple of the Mitsuoka kits in the stash too but didn't know about the track. These ones are still unbuilt.

 

IMG_20190703_231406-L.jpg

 

I've also got an F40 with a full interior and engine plus a Knight Rider KITT somewhere. 

 

If you like this sort of cute car, check out Neko Works. They make these cute style cars in resin. They're solid so no interior details at all. The bodies are very well detailed though. 

 

IMG_20190703_231623-L.jpg

 

Carl

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@ BloodwestSiR : That's a nice collection of Mitsuwa kits. I've looked at the Nekko Works models, but those are solid castings and I want to add full interiors to my Porsches.

 

@ Vandy 1 VX 4 : Thx for the links !

 

@ scvrobeson : You bet ! There's TONS of very nice markings. Pattos place has decals for all of them.

 

If I'm succesful in producing resing copies of my master. The idea is to modify them into :

 

Longtail :

 

f71de44abf332f40ab27463003db90ef.jpg

for reference purpose only

 

Even more cartoon style :

 

49257d1c4b660ff9357cbc0af1d8629e.jpg

From : wickedartz.com , for reference purpose only

 

Or more detailed short tail :

 

72a5dfa302bd159a91b7eb1acfacef6b.jpg

for reference purpose only

 

If I'm not succesful in making resing copies myself. I'll send the master to Christian : https://www.mezzo-mix-models.de/

 

Sincerely

 

Pascal

 

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  • 2 weeks later...

Been busy this weekend making the mould.

 

First part of the mould :

 

289168cc85535aae700ed0eda14a9a9f.jpg

 

Second part :

 

06388375cc291daa3e552fc9ac7ac6bf.jpg

 

And the first test shot :

 

2cf4f0f84aeb7ad86e96eaad988a38db.jpg

 

I'm quite pleased with the result. There's very few air bubbles and most of the details are present on the test shot.

 

Before I cast a second shot, I'll do some clean up on the mould cause there's a couple of spots were the rubber has formed 2 layers in stead of one.

 

The mould could have been a bit wider, I'll take that into account for a next mould.

 

I took out the first test shot (after 24 hrs) before the resin had fully cured. According to the instructions the resin is fully cured in 7 days (!)


Should be able to cast the second shot on thursday or friday, will take photos of all angles when the resin has fully cured.

 

Sincerely

Pascal

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  • 1 month later...
34 minutes ago, ringleheim said:

I love it!  I had to go to youtube and watch Derek Bell blasting down the Mulsanne straight, pre-chicanes!  

 

Sets the tone for the build!

 

 

 

 

Man, starting around .43 mark that is one HELL of a straight away!   Mesmerizing at a sustained 225mph!!! Thats got to be a thrill 

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  • 2 weeks later...

Been a while. I've tried a different type of resin from the brand Resion. This hardens in 90 minutes, instead of 7 days for the other resin that I used.

 

Sofar I've casted 9 bodies, 4 with the clear resin, 5 with the white.

 

These are 4 of the white bodies, the one on the left didn't come out well, cause I left the mixture harden to long :

 

308961bf563d149505d0ac59cb653208.jpg

 

The white resin give a much smoother result then the clear resin :

 

8ef2cf32433bbd454cbb207e882d95ff.jpg

 

There's still a lot of refining to be done :

 

e81f87757c644b9d58d8ba89b689a10c.jpg

 

But I'm having tons of fun experimenting with resin and that's the most important thing.

 

Sincerely

 

Pascal

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  • 2 months later...

Been busy at work, but I have a couple of days off.

Wasn't happy with the castings, figured that the reason was that the female part of the mold wasn't large enough.

This caused the sides of the castings being to thick and bending outwards.

I ordered some new silicone rubber and made a new female part, using the male part of the mold and some lego.

Here it is after 8 hours :

 

cc9f878af5ecf7fdba8dc288d9321d5e.jpg

 

The new mold is a lot bigger, specially on the sides (doesn't show very well on this photo) :

 

735ead855a349b77e32ffe681803ba3f.jpg

 

So far so good, but I made a couple of errors. The silicone was seeping through the lego blocks because I didn't put in pieces of cardboard or tape to line the inside.

Took me almost 2 hours to get the mold out of the lego blocks.

Then I decided to cast the first body, but forgot to spray the mold with a release agent.

This was the result :

 

34bb13d5c288fa5e60a7ddfcccbf7f0c.jpg

 

And I spend the next couple of hours picking small chips of resin out of the mold.

But there's good news !

I cut some excess rubber away from the male part of the mold, on the left the last casting from the old mold, on the right the first from the new :

 

a92ff81e68b3bf900897930f57a02ada.jpg

 

Old mold with all the imperfections on the side of the body :

 

1ee9b37670b767a91c52cd577fb2ddea.jpg

 

New mold (this is the broken body, glued together) :

 

fb0434e83464f7c241e4e3951f76bbfb.jpg

 

And this is the second body from the new mold, after some clean up :

 

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d74a71e0b01baea7fee5e0dba3b360ec.jpg

 

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Still not perfect, the area at around the windshield needs some work. I think some modifications on the male part of the mold will help.

Sincerely

Pascal

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  • 2 weeks later...

Update :

 

All the bodies that I've made sofar have 1 big problem : the area around the windshield and windows.

 

They have to be really thin to allow the 1 part windows to fit, but that makes them very fragile.

 

I hope it will get better when I'm able to vacform the windows, but that's something I've never done before, so that will be another first.

 

This photo shows the problem area :

 

20657a264234d00bda7b026ef6d3c1d2.jpg

 

The body from the kit looks like this :

 

e194ea7241cfc1cdf2e7ab9067cc64e4.jpg

 

So I made another mould (the "male" part this time). The rubber needs to harden 8 hours, fingers crossed that it will turn out all right.

 

 

Good news :

 

I've been fairly succesful in casting the rims / wheels. At the moment they're not all the same height, the will be corrected when the tires are done :

 

92df6aa58369e5fa8d15223ba93e73bc.jpg

 

The details came out pretty nice :

 

6116b1f5dab7a0336ad20a1296974bb0.jpg

 

But I'll need to make a new mould (with a harder rubber) to cast the other version of the wheels. Some tiny pieces of rubber broke off after 2 castings :

 

2f86e47fe0707124235b2b1a1f5ef349.jpg

 

I wasn't succesful in making a mould for the rubber tires, so I used my lathe and made the front tire from a nylon rod, the rear tire from a alu rod.

 

I made the diameter a little bigger so that they fill the wheelopenings a bit more :

 

db7e459fc54cdb1c022be696b87bce44.jpg

 

d0cccbe53ca2041d14dae3b0831984dd.jpg

 

Will make the mould for the tires this weekend, I hope that all goes well.

 

Sincerely

 

Pascal

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