Thermoplastic not adapting to teeth

[HelloKitty123]

Hi, i am using formslab 3d printer to print models and make nightguards from them. So I vacuum the plastic onto the model but for some of these the plastic is not adapting, there is no teeth on the plastic, no features or anatomy . Below is a link to an image, i hope it works. Please help

Screenshot-20210327-205153-Slack hosted at ImgBB

Image Screenshot-20210327-205153-Slack hosted in ImgBB

ibb.co

 

[zero_zero]

How would adapt to plaster model using the same technique ?

 

[HelloKitty123]

I tried with die stone and the same thing happened. Do you think its something with the impression

 

[erykd1]

We happened to stumble on an issue with night guards on 3d models using thicker material (dual laminate 3mm and 4mm) on our biostar pressure former- 3d models needed a much longer hold time under pressure or much of the details and retention would be lost. Turns out a gypsum model absorbs the heat while a 3d model needs much more time to cool. Don't know if that's your issue, hopefully it helps someone out, as even tech support from a couple different companies couldn't figure it out.

 

[Flipperlady]

Just thinking off the top of my head and may not be helpful, however I would try to cover with a small bowl while vacuuming and see if that helps, or dup the model in labstone and try that way.

 

[Doris A]

What machine are you using?
Are you heating the material long enough?
Are you leaving the vacuum on long enough?
Normally when you see this, it's not getting hot enough or the vacuum wasn't on long enough. Or both.

 

[JMN]

Or they didn't cut out the palate.

 

[Doris A]

Or they didn't cut out the palate.

From the OP's pic, there isn't a palate.

 

[JMN]

From the OP's pic, there isn't a palate.

RIght, just adding that for the person that looks up the thread later.

 

[rkm rdt]

Hi, i am using formslab 3d printer to print models and make nightguards from them. So I vacuum the plastic onto the model but for some of these the plastic is not adapting, there is no teeth on the plastic, no features or anatomy . Below is a link to an image, i hope it works. Please help

Screenshot-20210327-205153-Slack hosted at ImgBB

Image Screenshot-20210327-205153-Slack hosted in ImgBB

ibb.co

you're not heating the material long enough.

 

[LGTCDT]

Time and temp

 

[bigj1972]

And some air channels wouldn't hurt.

 

[HelloKitty123]

Guys thank you for your responses. I used the scheu ministar and the nightguard came out great verses a typical vacuum press