Cute Porsche 956 / 962

[Pascal]

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  :

 

 

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 :

 

 

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 :

 

 

Topside :

 

 

 

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

 

 

 

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

 

 

 

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

 

[Cooper645]

I like this, I recalled another member doing some casting and have looked out the thread for you.

 

 

I hope this helps and look forward to seeing the results.

 

[Pascal]

Been busy this weekend making the mould.

 

First part of the mould :

 

 

Second part :

 

 

And the first test shot :

 

 

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

[Pascal]

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 :

 

 

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

 

 

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

 

 

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

 

Sincerely

 

Pascal

[Bandsaw Steve]

I’m very impressed with how well these have moulded. I’ve never cast anything - except for a fishing rod - so this is real food for thought! 👍

[Hewy]

Your  molded bodys are  improving rapidly, that last one looks good to go ,i see the kit is basically an egg car if you like , it'll look  great opened up with an oversized engine bulging out, cool project

[Pascal]

Thx guys.

 

My castings are far from perfect. I estimate that each body requires about 1,5 hours of putty, shaping and sanding. 

I started to cut out the openings for the headlights, I hope I'll be able to make the small "boxes" that will hold the headlights.

 

Sincerely

 

Pascal

[harveyb258]

Looking good Pascal. 

It looks like a fun project.

 

Cheers, H

[Spiny]

14 hours ago, Pascal said:

Thx guys.

 

My castings are far from perfect. I estimate that each body requires about 1,5 hours of putty, shaping and sanding. 

 

That in itself is a triumph - I think I often spend that amount of time on corting out kit bodies But then again, I can be very slow.

[Pascal]

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 :

 

 

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

 

 

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 :

 

 

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 :

 

 

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

 

 

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

 

 

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

 

 

 

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

[Pascal]

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 :

 

 

The body from the kit looks like this :

 

 

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 :

 

 

The details came out pretty nice :

 

 

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 :

 

 

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 :

 

 

 

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

 

Sincerely

 

Pascal