あの迷作「氷を閉じ込めただけなのに　UVレジン」の続きが出てて草

静かなる「ぃよっしゃぁ・・・！」にクスリ。正直木材とシリコンはへばりついて取れないんじゃないかと思いました。 エポキシ樹脂が発熱したのは単純に量が多すぎたんじゃないかと。化学反応で硬化する樹脂は気温や量の影響を受けやすく、気温が高いほど、量が多いほど反応が速く進みます。そこに反応熱も加わって倍々に反応が進み凄まじい温度になりますので火傷や火災に注意してくださいね。 立ち上る煙も湯気と表現されてますが、実際には毒ガスなので吸い込まないようご注意を。めっちゃ危険です。 ついでなのですが、実はこういった化学反応系の樹脂とプラコップは樹脂が侵食、反応熱で変形等するため相性が良くないです。 硬化不良の可能性もありますので、ポリビーカー等の使用をオススメします。 何はともあれ、これからもご安全に！

@kurahito

2 жыл бұрын

ありがとう！

The resin cured in the cup due to the amount of resin you put in it. I forget the actual name of the term, but what happens is that the reaction that causes resin to cure produces heat (hence the smoke coming off of the cup). This heat then speeds up the reaction, causing the resin to put off more heat, which in turn speeds the reaction up. It's pretty much impossible to stop once it happens, but keeping your mixed resin in a flatter container should help. There are different epoxy resins that are specially made to prevent this (they're usually labeled as "deep pour"), but they take much longer to cure. Hope this helps!

@KewneRain

2 жыл бұрын

thermal runaway

@ReinQuest

Жыл бұрын

Exothermic reaction

@elliot_rat

Жыл бұрын

it's happened to me before too 😭

建物レベルだとまだ難しいかもしれないけど、木製のモノで老朽化して折れてしまった部分を今回のやつでかたどって修理するとかそのうち出来るようになりそう 実際こういう誰も思いつかない感じのをやってくれる先駆者がいるから、現代の技術があるんだよね

I really love watching your videos. I do like how you always do random, but really cool stuff and experiment along with us. As well as showing us along with you.

The epoxy cures faster the more heat there is. Epoxy resin is also an exothermic reaction. If you let a lot of epoxy sit in the cup, it will cure rapidly because it generates it's own heat.

@larrypinhead7572

Жыл бұрын

I saw a lot of people on youtube used big amount and didn't fuck up. How the hell?

だけがだけしていない定期

@user-zp8hk3sh9u

2 жыл бұрын

なろう系漫画みたい。

@Nagatuki-Ao

2 жыл бұрын

だけじゃないテイジンみたいw

I have seen others using sprays and liquids called mould release. They make different kinds for the type of material you are using to cast or mould with, like some for silicone or epoxy. If you spray that on the wood or on the mould before you do the cat it separates easier.

こういうのって実験したことさえ忘れきった頃に突然なんかの有用な方法として思い出したりして「あぁーあの時ただ遊んでてよかったわー」て 嬉しくなる日が来たり来なかったり

Always best to mix in small batches for each project separately instead of a bunch all at once because most resins have a short window of time before they start curing and the greater the amount mixed in one container, the faster it will cure.

I think it's called epoxy runoff or burnoff or something like that. That compound cures slowly but generates heat. If heat is not dissipated to the air or the part you are attaching it to, it will heat up too much and thus will cure faster, generate more heat, and the cycle repeats. This can make the epoxy boil, be more runny than desired, cure unevenly, and melt plastic or cause burns if it touches your skin. When doing resin pours there are indications for the maximum recommended thickness and other similar information.

I really like watching your videos, but I just noticed that you have captions in 15 different languages (not including Japanese)!! That’s amazing!

用途があるとか無いとかじゃなくて 発想大事だと思う、この動画を観た人が、あ！あれに使えるんじゃね！ て思える事が大事だと思う

2:19 It appears that the cups and fork absorbed some of the heat coming off the epoxy resin, bending themselves in the process. The way epoxy cures is that the heat accelerates the curing(this is why you need to pour large projects in layers - otherwise the epoxy gets too hot and accelerates its curing unsafely), thus where the heat was absorbed by other things (in this instance - the cup) the epoxy didn't cure as fast, allowing this creature in the middle to harden first :)

@larrypinhead7572

Жыл бұрын

I saw a lot of people on youtube used big amount and didn't fuck up. How the hell?

型を掘れば少し複雑な形のやる木が作れそう

噛み合うのとか木目とかかっこいい

Generated heat is proportional to volume, so for a spherish shape, it increases with the cube of the radius. Heat dissipation must go thru the surface of the material, so it only increases with the square of the radius. So as the amount increases, the speed of setting increases with positive feedback. Perhaps mixing this same amount would work better if the cup were placed in a cool water bath and occasionally mixed to equalize temperature between the center and the edge.

@kurahito

2 жыл бұрын

I understand, thank you!

@MrsPerkinsJejen

Жыл бұрын

@@kurahito ロシア語は話せる?

It could be an interesting experiment to do this same thing but to try to color the epoxy with sawdust so it looks like wood. Not sure if there is a safety risk or not though since epoxy releases heat as it hardens and sawdust is flammable. Probably fine though as long as you're careful?

When refinishing antique furniture this skill set eould be invaluable for broken pieces of wood on the furniture

アルジネートってあれか、マウスピース作るときに歯形取るために噛むやつか 歯医者さんの匂いって言ってるし

これは.......！！！ 間違っていなければ....... ありがとうございますっ！！ m(*_ _)m

耐熱性のある型取り素材があれば 棒を引き抜くことなく焼いて処理できるのにな

1:33　謎の粉の存在は学習してて草 まあ前も名前と用途は言ってたが()

you could put plastic around the 4 sides of the broken wood and have the plastic go up past where it is broken. then pour the resin directly on top of the wood into the plastic so it would set on the wood. but then you would lose the texture.

Cool! ♡❤️ looking forward to more experiments 👋 😃

レジンは主剤と硬化剤を混ぜるタイプですよね 以前同様のものを使用したときは分量を間違えて、かなり煙みたいのが見えたことありました。 また自分の考えで申し訳ありませんが、コップの上の方(2/3以上)が速く硬化しているように見えたので、下まで硬化剤が拡散しておらず上の方の分量が規定より多くなってしまったのではないでしょうか

シリコン流す時木材を最初から入れてるんじゃなくてあとから入れた方が楽そうだなって思った

You can blow compressed air around the inside of the mold to help loosen it.

@kurahito

2 жыл бұрын

I didn't know how to do that, thank you!

5:10 木材の欠けた部分の複製とかレプリカ作りとか...?

木材とエポキシ樹脂とでキャッキャウフフ する動画

エアプ勢です。 エポキシの硬化、部屋に日光が差し込んだりとか電球の真下とか反射光なんかで紫外線が反応したんですかね？ あとレジンを固める際に竹串刺しておくと取りやすそうだなぁと思いました！

ものづくりおもしろいね

question: at 0:25, why did you put a stick on top of the mold? is it for balance? 質問: 0時25分に、なぜ型の上に棒を乗せたのですか?それはバランスのためですか? (私はグーグル翻訳を使用しました)

@kurahito

2 жыл бұрын

To keep the wood floating.

@quackintosh

2 жыл бұрын

@@kurahito oh, I see now. Thanks! :)

The reason why alginate smells like a dentist's office is because alginate is used in making molds of people's teeth when making braces and such as there is a version of it that is non toxic (I assume the one sold in craft stores and such might not be safe to consume due to additives of some kind)

@birdandcatlover5597

2 жыл бұрын

ah, i was wondering if that was what is was! Feels a bit like a pink rubber eraser

Spray mold release agent in the mold, easier to demould...

マウスピースとか作るときに歯型とるのに使うやつかな？

Instead of poking your molds with sharp objects or tearing them, try spraying mold release Before filling molds and soapy water down into the sides when de-molding.

@farialmab4723

Жыл бұрын

Also, since epoxy resin sticks to wood, you can make a mold of the UNBROKEN wood, then half fill with resin and put the wood IN the mold to cure Together: you should have one whole piece when it’s done.

2個めの、あれをあれできるのだ…！

ive seen others that use molds and they use a release agent

いい案 。 注意する必要があります

here is a tip to cut open a mold but still be able to reuse it cut it in half in a zig zag form that way it fits back together easily

エポキシ樹脂について調べてみたら、主剤 (A液) と硬化剤 (B液)を混ぜたことで、化学反応で発熱し硬化する。こういう接着剤つかってたな。 化学反応だから、使う分だけ作るのが適正かと、、

レジンテーブルってこんな感じで作られてるんですかね…？？

Большие объемы эпоксидной смолы сильно нагреваются! Поэтому изделия заливают небольшими слоями поэтапно.

エポキシによるけど計200g超えたらえぐい熱さになるとかなんとか

@kurahito

2 жыл бұрын

今まで300gとか何回もやっててこんな熱くなった事なかったんよねー、形状が大事みたい

@Appoorle

2 жыл бұрын

@@kurahito なるほど🤔

硬化剤の量は適正ですか？ 硬化剤の量が多かったり残りの材料が多い場合でも発熱は大きくなります。 あとは気温ですかねー。硬化剤は敏感なんで冬用と夏用分けてるものもあります。 適量守らないと発火する場合もありますから気を付けて。

the dentist smell...I wonder if that is esentially the same material my orthodontist used to make a mold of my teeth for braces...that stuff felt like a pink rubber eraser

Had this happen once, kept the cup as a reminder to never do it again. It still looks cool, though

@AFarmerCalledChicken

Жыл бұрын

Also an easier way to remove items from a mold is to use baby/body oil.

Heat can only escape the mass of resin monomer/catalyst mix via it's surface, and due to square-cube law the surface area of an object relative to it's volume gets smaller the larger that volume so the larger the cup of resin the slower the heat of curing can escape, what this means is that large volumes of fast curing epoxy resins can undergo thermal runaway if in containers that aren't very thin and tall, or short and wide, as the process of curing or the polymerisation of the resin is exothermic and the rate of the polymerisation reaction increases as the temperature of the reactants is increased. What this means is that if your container of resin doesn't have enough surface area (or heat-conductive material) to conduct heat away it creates a feedback loop where the curing resin experiences a runaway reaction of accelerating self-heating, this runaway reaction continues until it runs out of unreacted resin monomer, the reaction slows or stops because the monomer is physically immobilised in the molecular network that makes up the solid or semi-solid polymer mass, or the reactants get so hot they or their solvents boil off until the reaction stops- this time it just means a small amount of vapours and a partially melted cup and spoon for this (relatively) small volume, but if it was a large bucket of resin it could melt the container and spill, cause burns if you tried to pick the container up or even catch fire if it got far too hot Resin and curing catalyst mixes made to be poured in large batches usually cure much more slowly so the temperature production is controlled, but you can control the temperature yourself by using a long and thin container, or by putting it in a cooler or warmer room of the building for slower and warmer reaction rates respectively, or for very fast curing resins prone to overheating placing the container onto an aluminium computer heat sink or in a water bath might help to draw heat out of it. Incidentally this is the same way fissile material that can undergo critical nuclear reactions like nitrates of enriched uranium are handled- the long thin containers prevent the solutions of uranium compounds used in it's processing like uranyl nitrate from reaching critical masses/volumes. It was a bit long and rambling but I hope it helps

加熱硬化型と常温硬化型があり今回硬化剤が加熱型硬化剤により加熱され硬化が進む現象が見られたようですね

なんか琥珀糖みたい。食べれんけど😆

やる木をコピー…

主剤を冷やしておくと長持ちしますよー

木工継ぎ手の継ぎ手部分をコピーすると面白いかも知れない。 片方は色付けすると構造も立体的に見えると思う。 (あと、型は上下なり左右なりに分割した方が成型物が取り出しやすいハズ)

@kurahito

2 жыл бұрын

全面クリアでいつかやってみたいとは思ってる

知的な遊びですね

サムネ一瞬ゼルダのカッシーワかと思ったw

If you mix up too much epoxy or it is in too hot of a room it can start going into an exothermic reaction and it is then useless

So you have what you call thin pour resin. And whens theres alot of it in a cup like you had it it starts to heat up. And the hotter it gets the faster it cure the faster it cures the hotter it gets ect. (:

声入っていることにびっくり

The epoxy melted your cup while curing

サムネがカッシーワにしか見えない

But epoxy is not as strong as wood. Which is why Chinese skyscrapers are falling apart because the outside of them are literal veneers.

固まったのは室温高過ぎた?硬化速くなるよ

make the thinnest unmotivated wood (or you cant do that?)

Kenapa judul nya pakai bahasa Indonesia jika aku tonton sama beranda

有沒有人講中文?

2:16水飴みたいで美味しそうと思ってしまった

@k4at5__prsk

2 жыл бұрын

僕はゼリーに見えた

引き抜くとき、ネジ突き刺して引き抜けば？