कला
सुन्दरता र कल्याण
हस्तकला
संस्कृति र इतिहास
मनोरञ्जन
वातावरण
खाना र पेय
रिभर्स इन्जिनियरिङ
विज्ञान
खेलकुद
प्रविधि
पहिर्न मिल्ने
Nitrile Rubber (Buna-N)
At IG Farben in 1930 Erich Konrad and Eduard Tschunkur copolymerised butadiene with acrylonitrile. The nitrile group makes the chain polar, so oil and petrol - which are not - stay out. Sold as Buna N, nitrile rubber became the standard material for oil seals, fuel hoses and, much later, disposable gloves.
**US 1,973,000**, "Rubber like masses from butadiene hydrocarbons and polymerizable nitriles", Konrad and Tschunkur, assigned to IG Farbenindustrie, filed 20. April 1931, granted 11. September 1934. It requires the butadiene to be more than about 60 % by weight of the mix.
**You build the part nitrile made universal: an O-ring seal.** Turn two plugs with sized grooves, close a clear pipe with them, and leave it under water overnight.
मध्यम
3 hours plus an overnight soak
निर्देशनहरू
1
1
The plug
The plug
One turned acetal plug: a flange that stops against the pipe end, a spigot that fits the bore, and a groove carrying the O-ring.
2
2
Measure and choose
Measure and choose
Cut 150 mm of clear PVC pipe and deburr both ends. Measure the bore at three angles and average. Pick a nitrile O-ring about 3 mm thick whose inside diameter is a little under bore minus 5 mm.
यस चरणका सामग्री:
पारदर्शी पिभिसी पाइप1 टुक्रा
ओ-रिङको संग्रह1 किटचाहिने औजार:
फलाम काट्ने आरा
गिट्टी कागज
डिजिटल क्यालिपर ६ इन्च3
3
Size the groove
Size the groove
Jupyter नोटबुक लोड हुँदैछ…
4
4
Turn the spigot
Turn the spigot
Chuck acetal rod. Face it. Turn 12 mm of length to the bore minus 0.1 mm, leaving a 5 mm flange at full pipe outside diameter behind it.
यस चरणका सामग्री:
डेल्रिन/एसिटल डन्डी1 टुक्राचाहिने औजार:
धातुको खराद
खराद औजार सेट (HSS)डिजिटल क्यालिपर ६ इन्च
सफा सुरक्षा चस्मा5
5
Cut the groove
Cut the groove
3 mm from the spigot's end, plunge the parting tool to the root diameter from the notebook, then widen to 4.0 mm. Check the root with the caliper. Break the sharp edges.
चाहिने औजार:
काट्ने छिनो (खराद)धातुको खरादडिजिटल क्यालिपर ६ इन्च6
6
Part off, make the second
Part off, make the second
Part off behind the flange. Make a second identical plug.
यस चरणका सामग्री:
डेल्रिन/एसिटल डन्डी1 टुक्राचाहिने औजार:
काट्ने छिनो (खराद)धातुको खराद7
7
Grease and fit
Grease and fit
Wipe a thin film of petroleum jelly on each O-ring and roll it into its groove without twisting. Put a folded dry paper towel in the pipe and press both plugs home.
यस चरणका सामग्री:
भ्यासलिन2 ग्राम
कागजको तौलिया1 पाना8
8
Overnight under water
Overnight under water
Weigh the capsule down in a bucket of water for 12 hours. Dry it outside, open it, and check the towel. Any damp spot shows which end leaked.
चाहिने औजार:
बाल्टिन9
9
History & Context
History & Context
**What the patent specifies:** a butadiene hydrocarbon (over about 60 % by weight) polymerised with a polymerisable nitrile, by heating or in emulsion. **Modern build (derived):** commercial NBR O-rings in an acetal gland.
Wartime Germany needed a rubber that fuel could not ruin, and nitrile answered it. More nitrile in the chain means more oil resistance and less flexibility in the cold. Its limits: ozone and sunlight crack it, and it swells in brake fluid and many solvents.
सामग्री
5- 1 टुक्राप्लेसहोल्डर
- 1 किटप्लेसहोल्डर
- 1 टुक्राप्लेसहोल्डर
- 2 ग्रामप्लेसहोल्डर
- 1 पानाप्लेसहोल्डर
आवश्यक उपकरणहरू
8- प्लेसहोल्डर
- प्लेसहोल्डर
- प्लेसहोल्डर
- प्लेसहोल्डर
- प्लेसहोल्डर
- प्लेसहोल्डर
- प्लेसहोल्डर
- प्लेसहोल्डर
डिजाइन फाइलहरू
1सम्बन्धित ब्लुप्रिन्ट
यी ब्लुप्रिन्टहरूले ज्ञान साझा गर्छन् — प्रविधि, सामग्री वा सिद्धान्त
CC0 सार्वजनिक डोमेन
यो ब्लुप्रिन्ट CC0 अन्तर्गत जारी गरिएको छ। तपाईं अनुमति नसोधी प्रतिलिपि, परिमार्जन, वितरण र प्रयोग गर्न सक्नुहुन्छ।
ब्लुप्रिन्ट मार्फत उत्पादनहरू किनेर सिर्जनाकर्तालाई सहयोग गर्नुहोस् सिर्जनाकर्ता कमिसन विक्रेताले तोकेको, वा यो ब्लुप्रिन्टको नयाँ संस्करण बनाउनुहोस् र आम्दानी बाँड्न आफ्नो ब्लुप्रिन्टमा जडानको रूपमा समावेश गर्नुहोस्।