Fusing plastic

[Klefmung]

I have four sheets of styrene plastic. One is too small, but two makes an ideal plastic square. Could I fuse them together?

[gannon]

If you have a plastic welder, not sure how good those work though.

[Kurt_]

You could sandwich the sheets between two sheets of metal or something. Then heat the metal where the edges meet, and push the two sides together, then push the metal down hard.

That's roughly what I would do.

[Indigno]

Or you could bondo them together, and reinforce it with some metal.

[Klefmung]

Well, I need to fuse them together for the purpose of vacuum forming. Neither bondo or metal would do well for such a purpose.

[Turbo Tax 1.0]

your gonna get pretty weird results if you try and fuse it together, i'd reccomend just buy the right size plastic.

but if your hell bent on fusing, try crazzy glue then some epxy by the name of "plastic welder"

[superdeformed]

You could try something like this (using just plain styrene instead of abs), although I'm not sure how well that would hold up so I'd try it on some scrap first. Alternatively, you could get a real (aka not acetone) solvent based plastic cement and try that, but again it may not hold together when you heat everything.

[gannon]

That looks a lot sturdier than bondo for patching cases

[Nucklez]

Wow, I like that acetone trick. I wonder how hard it would be to shred up the excess styrene to use in a project instead of bondo. I worked at an injection modling plant for about a year when I was younger and they recycled the bad plastic parts by throwing them in a HUGE grinder that shredded up the plastic. That injection molding plant was cool, they actually had "gaylords" of plastic. It was a 3' x 3' x 4' box FULL of plastic pellets and a huge hopper sucked up the plastic pellets into the top of the mold where the pellets where heated up and then injected into the mold. Some of those injection machines where as big as train engines.