1 Topic by dubbsd

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Topic: Question about PLA and temperature?

HAPPY FATHERS DAY!
I have been printing Lithophane boxes and the lithophanes are PLA. I use the bulb shown belowD run a test to see how hot the LED bulbs get putting the probe against the bulb and here is the results.
notice I had the TC up against the bulb.
is it to hot for PLA.
Thanks
dale

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2 Reply by Tin Falcon

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Re: Question about PLA and temperature?

how far is the lithopane from the bulb ? does the design allow for air flow ?   
A more realistic test is to  mount the box and place the temperature sensor on the lithopane. I expect the temp to be fine. unless the box is fully enclosed and very close to the bulb.

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3 Reply by dubbsd (edited by dubbsd 2020-06-24 21:32:02)

  • dubbsd
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Re: Question about PLA and temperature?

Thanks Tin.
I didn't have a lithophane box at the time so I used a Qt Jar ( Plastic) to cover it and let it heat up for an hour before I took the readings so it was sealed.(no air flow) I figured the bulb would be the hottest area so i secured the TC to the bulb.

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4 Reply by carl_m1968

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Re: Question about PLA and temperature?

Glass transition Temps are well over 100. That's when the material begins to melt. So you should be fine even in a sealed enclosure. But you should vent just to be safe and extend the life of the bulb. Honestly I would use 4 watt night light bulbs. Just as cool but much lower cost.

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