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#epoxy

3 Beiträge3 Beteiligte1 Beitrag heute
Öffentlich
Barry Schwartz
A second step, raised on pylons, to which it is held by nuts on ½-inch threaded stainless steel rods. The joint is not quite flat, so hopefully the step is stiff enough not to bend under the tension of the steel rods. Otherwise I will have to start over!

There are six black ash hardwood joists, though they are thin. However, though epoxy is easily bent over time, much of the epoxy here has been stiffened with chopped fiberglass. So there is hope.

The original step now needs to be raised a little. It sits only on the outermost joists. I am considering using wooden boots on those joists.

#Alt4me #epoxy #epoxyResin #woodworking #steel #stainlessSteel
#stainlesssteel
Öffentlich
Becky Barnes

My daughter had a few boxes of Girl Scout cookies left to sell, so we made up some "dragon-snails". People could adopt-a-snail (for the price of 3x boxes of cookies), and get 3x FREE boxes of cookies! Such a deal!

One (rear) had garnet cabochon eyes, and the other (front) had tigerseye cabochon eyes.

Two yellow-orange painted "dragon-snails" crafted out of epoxy clay, set into real seashells. The one in front has a long puppy-dog face, while the one in back is perked up curiously.
#dragonsnail#dragon#snail
Öffentlich
TomKrajci 🇺🇦 🏳️‍🌈 🏳️‍⚧️

How to remove/demold a part from a fragile part. (Hint: You can create shear in more than one way, and it may be better than creating a peeling action with hammer and chisel.)

The blue Styrofoam that served as the form will be destroyed as it's removed from the fiberglass wingtip weel, but it's a one-off form/mold that lacked any taper.

(This is a follow up to universeodon.com/@KrajciTom/11 )

#avgeek #aviation #ElectricAircraft #ExperimentalAviation #homebuilt
#Glider #DIY #Wing #Epoxy #Fiberglass #Composite #Shear #Peel

No! You risk damaging the wing's surface this way. (OK, you could use a plastic/rubber wedge, but let's try a finesse method first...)
The long clamp squeezes on both ends of the fiberglass part...never touching the wing. This squeeze causes the base of the fiberglass part to bow outwards...shearing along the surface of the wing.
Only light force was applied to tighten the clamp...and the part easily popped off.
Öffentlich *
Still Mad About CD Prices

Q1: ...what you have made or created differently, with alternative, new, or infrequently used, skills?

I'm a middle-aged person in the rural northeast US (currently). It seems like many things I've done have involved new skills; I enjoy trying new things (not always perfecting them, though).

Epoxy resin is a material I've had to learn some skills with. I've used it to coat #3dprinting objects (diluted with denatured alcohol it's cheaper than commercial smoothing agents), seat beach/sea glass in mosaics, repair various things, create various decorative items (often combined with a drop or two of alcohol ink), coat the surface of a play/work table, etc.

I also used it to make a "book safe": I removed the spine and covers of the book, dipped all the pages in thinned bartop #epoxy #resin, then clamped the pages all shut for a few days while the resin cured. After that, a drill and coping saw were all I needed to cut out the middle "hidden compartment" part. I glued the covers & spine back on, and the results were fairly nice. The advantages of using resin over glue included (1) not spending hours gluing all the pages and (2) working with the combined pages as if they were a solid block of plastic-wood, instead of hobby-knife cutting through layer after layer.

An innocent-looking book sitting on a shelf next to some DVDs and a basket. It's just an ordinary book, right?! OR IS IT
The book lying on a table. Still a COMPLETELY NORMAL BOOK NOT HIDING ANYTHING. The title is "The new Larousse Gastronomique".
Close-up of the pages of the book. To me they look pretty normal, not like a book safe (except they are slightly wavy).
The book is opened and... no way! It is hollow inside! Filled with weird-shaped polished pieces of colored glass! And there are some magnets at the corners to help it stay shut.
#MakersHour
Öffentlich
TomKrajci 🇺🇦 🏳️‍🌈 🏳️‍⚧️

Making a fiberglass wingtip wheel for the glider wing.

1st photo - making the mold/form out of foam, with a 60mm diameter inline skate wheel in place. Note that the underside of the wing is covered with clear tape to protect it from epoxy when I lay up 7 plies of glass.

2nd photo - making the fabric template. A single piece of glass fabric (weave 7725 because it drapes so well over various curves and corners) will make the final part, but there will be an overlap along the trailing edge. I draped a piece of plastic over the foam form after it was hot-glued to the wing and then traced out the pattern, with some reference marks such as a center line.

3rd - Demolding the cured part by squeezing it so that it flexes/distorts a bit...and the epoxy at the base easily shears off from the waxed clear tape. (No need for hammer and wedges.)

4th - rough sanded final part.

#avgeek #aviation #ElectricAircraft #ExperimentalAviation #homebuilt
#Glider #DIY #Wing #Fiberglass #Epoxy #Composite

Blue Styrofoam is attached to the underside of the glider wingtip. The foam is easy to sand and shape to the desired contour. Unfortunately, such a mold is single-use becuase I did not add any taper to the part, so I had to tear the foam out with pliers after the fiberglass cured. No worries, I have paper templates in order to quickly make a second form for the other wing.
A template for the fiberglass fabric. This wingtip wheel is a single-layup operation. Note that while the leading edge will be a continuous piece of fabric, but the trailing edge will have the two ends overlap.
Demolding a part *should* be an easy matter...if you set things up correctly...good geometry in the mold, proper use of release wax, etc.
Final part after rough sanding to remove the outer weave pattern. It will get a proper trimming job later, then painted white.
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