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PTFE Disc: Sintered in a Molten Nitrate Bath, Cooled Slowly (Brubaker & Hanford 1946)
A PTFE disc pressed cold, then sintered by dipping it in molten salt at 380 °C for half an hour. Instead of being quenched, it cools slowly between magnesite blocks. The patent says slowly cooled pieces are a little softer and less stiff, which is often better for machining.
Source: M. M. Brubaker and W. E. Hanford (du Pont), US 2,400,099 (1946), Example II. The patent gives no nitrate-to-nitrite ratio. The mould, press, pot and burner are ours. Picture drawn by Youblob.
Juu
1 day
Maagizo
1
1
Press a disc at 500 psi
Press a disc at 500 psi
At 25 °C, press PTFE powder at 500 lb/sq in into a disc 2 in across and ⅜ in thick.
Vifaa kwa hatua hii:
Unga wa resini ya PTFE1 as required for the discZana zinazohitajika:
Kalibu ya kubana
Mashine ya kubana ya haidroliki
Rula2
2
Melt the salt bath at 380 °C
Melt the salt bath at 380 °C
Melt a mixture of sodium nitrate and sodium nitrite and hold it at 380 °C. The patent gives no ratio. Ours: a cast iron pot on a gas burner.
Zana zinazohitajika:
Chumvi ya baruti ya Chile (nitrati ya sodiamu)
Nitriti ya sodiamu
Chungu cha chuma cha kutupwa
Kichomea cha gesi
Themokapo yenye kionyeshi3
3
Dip the disc for half an hour
Dip the disc for half an hour
Lower the pressed disc into the molten bath and leave it there for ½ hour.
Zana zinazohitajika:
KoleoChungu cha chuma cha kutupwaThemokapo yenye kionyeshi4
4
Cool it slowly between magnesite blocks
Cool it slowly between magnesite blocks
Take the disc out and lay it between two magnesite blocks so it cools to room temperature over 1 hour. It comes out tough and even, close to its pressed shape.
Zana zinazohitajika:
Koleo
Matofali ya magnesitiVifaa
1- 1 as required for the discKishikilia Nafasi
Zana Zinazohitajika
10- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
Mchoro huu unatengeneza
Blueprint zinazohusiana
Blueprint hizi zinashiriki maarifa — mbinu, vifaa au kanuni
PTFE Resin Powder: Tetrafluoroethylene Polymerised under Pressure, Plunkett 1941
na Charlie
Viwandani
5
0
0
0
0
0
PTFE Ring: Pressed Cold, Sintered Out of the Mould (Brubaker & Hanford 1946)
na Emma
Utengenezaji wa plastiki
12
0
0
0
0
0
PTFE Rod: a Plug Sintered in Boiling Retene Vapour (Brubaker & Hanford 1946)
na Emma
Utengenezaji wa plastiki
5
0
0
0
0
0
CC0 Umma Wote
Mchoro huu umetolewa chini ya CC0. Uko huru kunakili, kubadilisha, kusambaza, na kutumia kazi hii kwa madhumuni yoyote, bila kuomba ruhusa.
Saidia Mtengenezaji kwa kununua bidhaa kupitia Mchoro wao ambapo wanapata Kamisheni ya Mtengenezaji iliyowekwa na Wachuuzi, au unda marudio mapya ya Mchoro huu na uiunganishe kama kiungo katika Mchoro wako kuchangia mapato.