<p>Acrylic is also very easy to scorch, for example when line bending or vacuum forming. I doubt you'd be able to melt it evenly without it getting a brown crust in places. </p>

CC BY-SA 4.0
2020-03-23T13:24:10.993Z
2020-03-23T13:24:10.993Z
Chris H
<p>There are lots of links that describe toxic fumes from burning or laser-cutting acrylic.  Apparently, the risk also applies to the molten plastic, as you would encounter with 3D printing or molding.  According to <a href="https://www.creativemechanisms.com/blog/injection-mold-3d-print-cnc-acrylic-plastic-pmma" rel="noreferrer">Everything You Need To Know About Acrylic (PMMA)</a>:</p>

<blockquote>
  <p>...fumes from 3D printing with acrylic or from the molten material used during injection molding should not be inhaled and ... should be conducted in a well ventilated facility to avoid the potentially hazardous effects of gaseous polymer. </p>
</blockquote>

CC BY-SA 4.0
2020-03-22T02:36:57.227Z
2020-03-22T02:36:57.227Z
fixer1234
<p>So, the title just about sums it up.</p>

<p>I've cut some acrylic sheets to make vitrines for some painting frames and I have some leftover strips of acrylic.</p>

<p>I have an idea of what to use the acrylic for, but that would require melting it into a mould to make it into a small block.</p>

<p>I've read that acrylic melts at between 160ºC to 190ºC - which are temperatures that any oven at home can easily reach - however, I'm concerned about whether melting the acrylic will release any noxious fumes or not. Because, if so, I certainly won't be doing it at home.</p>

<material-selection><plastic><safety>
I am looking to melt some leftover acrylic into a mould, at home. Are there fumes that I should be worried about?
Valeriano
# I am looking to melt some leftover acrylic into a mould, at home. Are there fumes that I should be worried about?

(Asked by: username_0 on 2020-03-22)

So, the title just about sums it up.

I've cut some acrylic sheets to make vitrines for some painting frames and I have some leftover strips of acrylic.

I have an idea of what to use the acrylic for, but that would require melting it into a mould to make it into a small block.

I've read that acrylic melts at between 160ºC to 190ºC - which are temperatures that any oven at home can easily reach - however, I'm concerned about whether melting the acrylic will release any noxious fumes or not. Because, if so, I certainly won't be doing it at home.

**Tags:** material-selection, plastic, safety


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## 2 answers

### Answer by username_2 on 2020-03-22. Score: 6 | Accepted answer

There are lots of links that describe toxic fumes from burning or laser-cutting acrylic. Apparently, the risk also applies to the molten plastic, as you would encounter with 3D printing or molding. According to [Everything You Need To Know About Acrylic (PMMA)](https://www.creativemechanisms.com/blog/injection-mold-3d-print-cnc-acrylic-plastic-pmma):

> ...fumes from 3D printing with acrylic or from the molten material used during injection molding should not be inhaled and ... should be conducted in a well ventilated facility to avoid the potentially hazardous effects of gaseous polymer.


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### Answer by username_1 on 2020-03-23. Score: 3

Acrylic is also very easy to scorch, for example when line bending or vacuum forming. I doubt you'd be able to melt it evenly without it getting a brown crust in places.


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