mould test man pdf

8/13/2019 Mould Test Man PDF

1/16

Mould Making -

Test Man


2/16


3/16

I took him out of the freezer and straight away got to work with building up clay around him. He istake much time before he warms up again, which increases the likelihood of accidental nicks. Here

Non-Firing Clay (Water-based air-dry clay) because after a LOT of research and trying to find this

I thought Id just try with what I have to hand and see how it turns out. So I placed him on a bed of

up around him to a half way mark where the seem would be for my two-part mould, making sure th

and not blended into the model. As he is made with oil based clay, using a water based clay is good

its easier to separate him later on.

03.

04.

05.


4/16

Once the half layer has been built up, hes bound to be a bit messy, so I used a soft paintbrush with

just brushed the lighter clay from him. Its also important to keep the water-based clay moist whils

just kept brushing over it with a wet paintbrush. When the ayer is built up and the area around him

everything up by chopping off the sides and smoothing it all back off ready for the frame. Image 09

of foam-core/foam-board I cut up slightly longer than the length of each side of clay and just over

ready to make the frame.

07. 08.


5/16

With the 4 sides of foam core I used a hot glue gun and started to build the frame. I built 3 sides the

back to the frame and cover the sculpt with petroleum jelly as a mould release agent. I researched

agents, one that was particularly well mentioned was spray wax release but when I was trying to

that it was quite a hard product to get hold of. I was originally going to use petroleum jelly but I

answers to the question is it ok to use with silicone?, in the end I thought Id just give it a go an

quite a lot of funds compared to other releasing agents.

11.10.

12.


6/16

After brushing a layer of vaseline onto the clays I finished gluing the 4th side of the frame and puttfoam-core on the bottom as a base to keep things nice and fixed together. Next I added a couple o

plasticise (I should have done this before fixing the frame for ease of access but thats a learning

attempt). The round pieces are great for a guide when making the silicone case these act as good p

the two halves of the mould fit together perfectly without slipping around. Then some angular piec

points of access, to separate the two halves. Then I added little pieces of plasticine around the edg

them in to prevent any leaking of resin.

13. 14. 15. 16.


7/16

With all of the clay and plasticine in place, I covered the inside of the frame in a coat of petroleum

water tight. The jelly texture can actually be picked up in the detail if too much is applied around th

to brush it off enough so its just a thin layer on the bit you actually want to cast the silicone in. N

jewellery scales so I could measure the chemicals accurately. I cut some plastic cups down so ther

area to get covered in the mix. Then I zeroed the scales with the empty cups and weighed out the

Fast Cast Polyurethane Liquid Plastic Casting Resin, 15g of part A and 15g of part B separately. I o

amount as the purpose of this is to try out the technique and materials. Then I just mixed the two p

poured it into the frame trying to get as few air bubbles as possible. Then left it to cure fo

17. 18.


8/16

After an hour the resin was set and I could remove the frame and move to the next step. I broke of

reveal the results of the first mould half. Then I separated the clay from the plastic and was happy

worked!

19.


9/16

Image 21. shows how easy it was to separate oil from water after the first half of the mould. He wa

this though so I held him in a tissue to reduce head from my fingers melting him and cleaned him b

and a soft paintbrush. Once he was clean I placed him into the new first half of the mould and ad

wedges (I learnt from the first half and made sure to do this before adding the frame). Figure 24. sh

him to get any nappy rash so I covered him in petroleum jelly again...

21. 22. 23.


10/16

Here I repeated the process of using the hot glue gun to make a new frame around this half. Then

with the small pieces of plasticine and covered everything in a coating of petroleum jelly to ensure w

to make sure the two pieces of polyurethane resin dont just stick together trapping my little

25. 26. 27.


11/16

Again I measured out each part of the resin by weight and mixed them together. I didnt have any

bubbles in the first half of the mould luckily, but I thought Id try brushing the first layer of resin on

it reduced that do occur, then I poured the rest in before it began to cure, and left it to

29.28.


12/16

After the second half resin had set it was time to dismantle and see how it had turned out. I had

seperating this one, it was because the round areas I had made were a little bit too pronounced, I fix

that is why its so useful to have those pry open points. I separated the two halves, then had to scrap

scrub the two part mould with some warm soapy water and a brush. I used a toothbrush and a nailb

nice hard plastic it can be scrubbed clean without worrying about parts getting worn like it would w

dried it with a cloth and a cotton bud in the hard to get areas.

31.

32.

33.


13/16

Once the mould was clean I had to take care of health and safety. Whilst I was cleaning it, the back

just from how it had set in the frame and it cut me, so I had to smooth it off. In good health and saf

ear defenders, dust mask, and safety glasses whilst working in a well ventilated area. Figure 33. s

things got. Image 34. shows the nice smoothness of the moulds now. This is also how I fixed the pro

locators inside the mould, I sanded them down ever so slightly and it was enough to make them fit

being too tight and hard to separate.

35.

36.

37.


14/16

When I separated the two halves an air bubble was revealed in the first half. I fixed this by mixing

Part A and Part B, filling in the air bubble and leaving it to cure. After my first mould is now mad

workspace to make the guys little wire armature.

39.

Air bubble


15/16

I constructed a little wire armature to be placed inside the little guy. Next step - Silic

41. 42.


16/16

mould test man pdf

Documents