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mold and unmold

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This topic contains 3 replies, has 4 voices, and was last updated by  Anonymous 1 week ago.

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HAHATAY SON RISAS DE GANDIOL defarat

mold and unmold

02/12/2019 at 00:47

Hello everybody,
Is there any of you that had any problems with the plastic injected into molds when it comes to unmold the object? We cannot figure out what we do wrong. It becomes quite difficult to unmold them. We are even thinking that maybe we should add some products to the mold or maybe look for some special paint. Any idea?
team defaratt

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In reply to: mold and unmold

hero
03/12/2019 at 19:13
2

Hello @defarat
There are a couple things you can do to easily remove your plastic parts from the moulds:

#1: Make sure that the internal walls of your mould are as smooth as possible. If your mould has any type of texture, the molten plastic will adhere to them.

#2: Use a mould release agent: You can buy mould release in spray cans, or make your own with cooking oil. Here are some examples:

https://www.youtube.com/watch?v=kNtkwKo0-VU

https://www.hunker.com/13410940/diy-mold-release-agent

https://www.youtube.com/watch?v=krJ8qpT8cL4

In reply to: mold and unmold

warrior
03/12/2019 at 21:07
3

Do you have a picture of your mold or design?

In reply to: mold and unmold

04/12/2019 at 12:01
1

@defarat, You can also drill a few ejector holes and punch it out with some pins – or make a thread and screw it out.
However, the walls need a slight angle to address exactly this problem. Also have a look at the more popular video about injection molding – explaining a little this problem.

 

 

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