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File: scrunt.jpg (1.86 MB, 4032x3024)
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This is an "inner" from my inline skates, fabric shoe-like things that act as a buffer between your soft feet and the hard metal and plastic of the outer that holds the wheel frame. They come with the skates, and generally can't be bought separately.
Frankly speaking, these inners are junk. The foam inside it has gone all orange and started crumbling, I tried to wash them but a bunch of this orange powder washed out with the water. The plastic tongue is also cracked beyond repair. I hope to unstitch them, make some patterns, cut them out of the same kind of material, and sew them back together. But I don't know what materials they are.

There are 3 main materials I'll need.
Firstly, is the mesh that makes up the inside. It's quite soft and comfortable, somewhat flexible.
Secondly is whatever the fake leather-style tough part that makes up the majority of the outside. It's about 1mm thick, though it's doubled/tripled up in a few cases.
Thirdly is the foam. I've no idea where to start on this, there's all sorts of foams out there, and I don't know what to go for in this application. While it's hard to tell since it's so degraded, I suspect it was about 5mm thick when intact in most areas. Some are thicker, but I should be fine doubling it up if required.

There are also some other materials present.
The slightly thicker fake leather on the sole:
>similar enough to the outside pleather so I'll just use that
The mesh on the toe:
>will probably just use pleather all the way around, just with air holes
The lace loops on the top:
>it's possible to lace the skate without them, but I should probably include them
>shouldn't be hard to find, though riveting is something i have no clue how to approach
The elastic strap:
>trivial
The plastic tongue:
>could 3D print one, will probably just leave it out, doesn't feel necessary to me

I figure once I've got all the materials cheaper than trying to find a new pair of inners that fit these skates.
Can anyone identify the textiles?
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>>2033353
the tongue and sole
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>>2033353


Look up a moccasin pattern. I would try and use mesh where mesh is already used. You can find it online in automotive interior replacement parts and it's fairly cheap. A simple laundry delicates bag would be a good piece to cannibalize for mesh as well. For foam, use any open celled foam you can find. The trick will be finding the right amount. You can glue layers of foam with spray adhesive when needed to thicken it up, or fold it on itself as you mentioned.

The leather esque material is likely vinyl, and off the shelf vinyl fabric should work fine. Poking holes near the top around the front third is a good idea for ventilation, but you may want to melt the holes after they're poked so they don't tear apart. Test this on a scrap using a soldering iron.

The hard outside shell of the boot is probably made of some type of PVC compatible plastic. Test this in a small area- acetone or PVC pipe paste (pic related). I used this to repair motorcycle ferrings. Missing material can't be easily added with this, but the point was to chemically bond the cracked areas and it worked.
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>>2034474
>ferrings
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>>2033353
>They come with the skates, and generally can't be bought separately.
did you try an internet search before giving up?
or just assume that they "can't be bought separately" without actually checking whether they can?

https://www.inlinewarehouse.com/Liners/catpage-FITLINERS.html
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>>2034547

Fairings. Thanks for pointing out my misspelled word that I pretty much never type or use in daily discussion. Point still stands-- you can repair some rigid plastics with pvc pipe primer and cement.
>>
I think you may have been buying cheap skates, because liners are sold separately.
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>>2033353
Just get used skates from a thrift store and remove the inners.
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>>2034474
Thanks a bunch for the reply.
>automotive interior replacement parts
>laundry delicates bag
Good thinking! This will work fine for external mesh, though the internal mesh needs to be quite soft. I'll cop a feel on some delicates bag at the store, see if I get some strange looks.
>any open celled foam
I've heard of open-celled and closed-celled before, I assume open will be better for ventilation reasons. I want something that will be relatively wear resistant though. I'll keep looking around to see where I can get it.
>vinyl
On closer inspection, the outside material should be salvagable, so long as I ditch the part that the plastic tongue is glued to and wash it out properly. Restitching through existing holes should be comparatively easy (no sewing machine). Will still need to buy a small amount for the tongue though.
>repair
Not going to work. The plastic tongue is shattered beyond belief. A quarter of it is scattered across the adjacent parking lot. Might be aged somehow, as it feels far too brittle. Either I entirely replace it and glue it onto a new piece of pleather, or I don't bother. I have the option of 3D printing something, though I doubt it will be strong enough. Another option is to attempt to make a composite tongue with fibreglass using a 3D printed mould, though I can't say I'm in the optimal location for that.

>>2034634
Was an oversimplified screed from someone who hasn't bought many skates before, aimed at people with less knowledge than I about skates but more knowledge than I about textiles. Yes I have searched, no Salomons in sight, nor anything else with the correct lacing mounts. Also I'm not keen spending three times more on inners than I bought the skates for.

>>2034700
>>2034814
>cheap skates
>thrift store
Where do you think I got these from in the first place? They were the only pair that fitted me.
>>
if i chain a bunch of optocoupler inputs in series, and put their outputs in parallel, can i use it as a really simple isolated low-efficiency step-down converter for powering things? or the other way around i guess. assuming the photodiodes in them could work as photovoltaic generators. i want to power an mcu off mains but have it be isolated
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>>2035046
Wrong thread but there is such a thing as what you're looking for. Photodiode or photovoltaic optoisolators for example are used as mosfet gate drivers.
More conventional switching power supplies do exist... you can get ac-dc board mount isolated power supplies that are pretty tiny.
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>>2034872

That plastic tongue you have in the picture there is likely repairable provided it's ABS plastic or polyurethane. The primer I linked earlier literally melts through the edge of the plastic and then a small smear of glue will give you a strong bond. You could also try and replace it with a piece of PVC pipe in a larger diameter. Measure across where the existing piece should be from end to end and see if you can get a short piece of a large pipe. It's not going to be as strong, but it will likely be less brittle than the one you have now.

Delicate bags are very soft. They should work great for a liner. If all else fails, some of those shoe liners from the shoe stores might work too, although they would be hard to hold in place.
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>>2035541
>likely repairable provided it's ABS plastic or polyurethane
As I said there are missing pieces, lots of really small ones. The gaps between the remaining pieces are often on the order of 3mm.
>PVC pipe
That might work really well. I can bend it with heat too.
>>
oops



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