# Concrete Ashtray

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Hello,

I am going to show you an Ashtray I designed using a 3D printed model.

I often use 3D printers, I really like the result we can get, but some objects can't be made of plastic... like the ashtray ! that's why I decided to use a 3D printer to create a formwork. Using this method, I am able to create a complexe geometry made of concrete ! and the result is awesome !

To make it, you need :

- a 3D printer, or the 3D model printed.

- some Concrete (I used White Concrete)

- a soldering iron, to stipping formwork easily.

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You need to 3D print this model.

If you have a 3D printer, you could make it easily.

In case you don't have a 3D printer, you can use the website www.3Dhubs.com, and someone will print it for you.

## Step 2: Cast the Formwork With Concrete

Once you have the formwork 3D printed, we can cast it.

In order to get something as clean as possible, the model you have printed is made up side down, that means the top part you will cast will be the ashtray bottom.

To cast it :

- Make some concrete

- Cast the formwork (make sure the formwork is perfectly full of concrete, with a flat surface)

## Step 3: Stipping Formwork

To stipping formwork, I use a soldering iron. You will be able to cut plastic like butter.

To stipping formwork :

- Cut several vertical lines all around the ashtray

- Cut one vertical line till concrete

- You will be able to take the formwork off really easily.

## Step 4: The Result !

The ashtray is done.

Using a 3D printer to make a casting, it's really easy to create several design for this astray. there are only 4 faces to change. I made 5 designs, you can see them on the images.

Participated in the
Concrete and Casting Contest

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## 2 Discussions

Hey Remi, nice ashtrays!

Have you tried thin wall molds? I've started experimenting with them and I've had decent success so far, but its still tricky with the inserts.

Hi Ryanto,
Sorry for my (really) late answer..!
I tried with 6mm walls, no less... (and it works well)
I'm actually waiting for a new filament, I'll try to cast concrete with HIPS filament (soluble), it will be really easy to uncast, and I will be able to cast any shape ! and I'll use high resistance concrete, by the way..