Casting from an original carving #6: Constructing the mother mold part 1b

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Blog entry by Jordan posted 02-02-2012 07:03 PM 2011 reads 0 times favorited 7 comments Add to Favorites Watch
« Part 5: Constructing a mother mold - Part 1a Part 6 of Casting from an original carving series Part 7: Breaking the mold »

Okay, now you’ve seen the front of the gourd with the plastic mother mold on it. The back now looks the same and butts up to the flange. So if I wrapped a belt around it, nothing would move out of alignment. It follows every bump and curve of the outside rubber so I know where to put it back on each time.

But what about the inside? If I removed the rubber, it would just flop around and I don’t want it to move out of alignment either.

I will also add to this page as it progresses but the true frame will probably not be able to be photographed until it has all been dismantled.

I will tell you this much though
- I have constructed three strips of plastic paste on the inside from bottom to top.
- They are all just wide enough to be removed through the opening at the top.
- In order to clamp them prior to pouring my casting, I had to make a key shape at the very bottom with my putty first so that I had a 3 way flange to attach a small hand clamp.

This is the first of the inside strips, it goes all the way to the bottom and ends with a flange. It is adjoined to the upper area.

This is a messy, sticky process and because my arm was only able to squeeze down the hole for the additional strips, I devised a system where I’d trowel the paste onto a suitbale thickness of wax paper, let it dry until it was almost dry but still pliable dropped it down the hole while holding the top part then gently smoothed it to the sides.

It still may not be clear but when all pieces are off and the rubber and mother mold have been removed, I will put together the frame prior to pouring and you will be able to see what I’ve done.


7 comments so far

View patron's profile


13609 posts in 3370 days

#1 posted 02-02-2012 08:12 PM

mama mia mold !

-- david - only thru kindness can this world be whole . If we don't succeed we run the risk of failure. Dan Quayle

View Joe Lyddon's profile

Joe Lyddon

10123 posts in 4081 days

#2 posted 02-02-2012 08:20 PM

I’m still hanging on for the ride! LOL


-- Have Fun! Joe Lyddon - Alta Loma, CA USA - Home: ... My Small Gallery:"

View LittlePaw's profile


1571 posts in 3107 days

#3 posted 02-02-2012 08:24 PM

I’m gonna b a moldy olde yet!

-- LittlePAW - The sweetest sound in my shop, next to Mozart, is what a hand plane makes slicing a ribbon.

View Don Butler's profile

Don Butler

1092 posts in 3424 days

#4 posted 02-02-2012 08:30 PM

I’m interested in this process because, a long time ago when I was a teenager, I made models and molds for the ceramics craft.
Of course, the molds were hard plaster, not rubber, so I’m watching closely to see how you do it in this way.
Best regards,

-- No trees were damaged in posting this message, but thousands of electrons were seriously inconvenienced.

View lanwater's profile


3111 posts in 2963 days

#5 posted 02-03-2012 02:55 AM

That second picture looks like a shark mouth :)

I see the strtip inside. That’s a very clever idea.

-- Abbas, Castro Valley, CA

View sras's profile


4812 posts in 3158 days

#6 posted 02-03-2012 05:39 AM

Okay – NOW I can see what is going to happen! This was taking too much of my time trying to anticipate your next move.

(I do have a day job and need to focus on that)

-- Steve - Impatience is Expensive

View Jordan's profile


1400 posts in 3154 days

#7 posted 02-03-2012 07:08 AM

Yes, come to think of it, it does look like a shark’s mouth.


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