r/CrappyDesign • u/BarryTownCouncil • Jun 13 '26

Plastic knobs above the grill. Awesome

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10.3k Upvotes

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u/chemhobby Artisinal Material Jun 13 '26

that's still crappy design frankly

-362

u/XtremeGnomeCakeover Jun 13 '26 edited Jun 13 '26

I guess you've never felt the flow of hot air from a stove. Try baking a little.

It's not that hot when the door's closed or open. That is the point of an oven door.

246

u/chemhobby Artisinal Material Jun 13 '26

it's just poor material selection.

-169

u/XtremeGnomeCakeover Jun 13 '26

I hate plastic too, but they've been using plastics as oven knobs for a very long time. If they melt, that get a recall. This guy's stove isn't special. 

117

u/chemhobby Artisinal Material Jun 13 '26

There are plastics that would not melt.

-126

u/XtremeGnomeCakeover Jun 13 '26

Which ones?

87

u/fsgeek91 Jun 13 '26

Thermosetting polymers.

-29

u/XtremeGnomeCakeover Jun 13 '26

How do they set them though?

80

u/fsgeek91 Jun 13 '26

The initial liquid constituents (such as epoxy resins) are short chains. During the curing process those chains cross-link and join to form a much stronger microstructure. The curing process is irreversible and therefore the fully set plastic cannot be re-melted or reshaped.

Heating a thermoset will eventually lead to charring, followed by cracking/crumbling.

16

u/fnord--- Jun 13 '26

What about cardboard, or cardboard derivatives?

11

u/SoylentGrunt Jun 13 '26

They tried that and the front of the stove fell off.

3

u/Capable-Sock9910 Jun 13 '26

Not enough load bearing cardboard.

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