Bending plasticard and polystyrene pieces

[JMann]

I have been using a heat gun to heat up the plastic to bend it to the desired shape. However it's difficult to get the bends to stay flat and create the shape that's needed. Building an engine bay and all the cross members inside using I-beams and practically every single one isn't a true straight bend but warps or bulges. How do those of you who do this achieve great results? Create a jig to the shape that's desired was one suggestion I have received. I did come across what appeared to be a flat heat pad where you can place the plastic piece on it and bend it to the desired shape. I imagine if this is the case you'd need something to the heat that's necessary without it melting the plastic on the pad right?

[BiggTim]

I use a hair dryer sometimes. Not hot enough to melt most plastic. And a jig is a good idea.

[thierry laurent]

Vacforming may be an option to get soft curves.

[Rick Griewski]

One of the techniques I find the most useful due to broad applications: two layers of plastic formed together in some way and made permanent using liquid cement between the parts. This works for sheet and strips. 
 

Example 

form two later curved surface for the inside of a cockpit by brushing on the liquid glue between the plastic and quickly pressing it into the  fuselage, hold until set.

 

Cylinder/cowling, wrapping strip or narrow sheet plastic around a form such as a socket wrench socket while gluing them together.  Use multiple layers for a ridged part. 

 

[thierry laurent]

Another important point: always use brand new plasticard if you intend to bend it. This is far easier as plastic becomes progressively less souple and more brittle as it is aging.

[wunwinglow]

On 8/24/2024 at 9:33 AM, thierry laurent said:

Another important point: always use brand new plasticard if you intend to bend it. This is far easier as plastic becomes progressively less souple and more brittle as it is aging.

Sounds like my body.....