Ubufatanye
UBUHANZI
UBWIZA N'UBUZIMA
UBUKORIKORI
UMUCO N'AMATEKA
IMYIDAGADURO
IBIDUKIKIJE
IBIRIBWA N'IBINYOBWA
UBWUBATSI BUSUBIRA INYUMA
UBUMENYI
SIPORO
IKORANABUHANGA
IBYAMBARWA
English
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.
Hejuru
1 day
Amabwiriza
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.
Ibikoresho by'iyi ntambwe:
Ifu ya rezine ya PTFE1 as required for the discIbikoresho bikenewe:
Ikibumbiro cyo gukanda
Imashini ikanda ikoresha amazi
Umurongo w'ipima2
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.
Ibikoresho bikenewe:
Nitiri ya Shili (nitarate ya sodiyumu)
Nitirite ya sodiyumu
Inkono y'icyuma cyasuwe
Igicanwa cya gazi
Termokupuli ifite igaragaza3
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.
Ibikoresho bikenewe:
Igikoresho cyo GufataInkono y'icyuma cyasuweTermokupuli ifite igaragaza4
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.
Ibikoresho bikenewe:
Igikoresho cyo Gufata
Amatafari ya magnesiteIbikoresho
1- 1 as required for the discUmwanya
Ibikoresho bikenewe
10- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
Iki gishushanyo gikora
Blueprint zijyanye
Izi blueprint zisangira ubumenyi — uburyo, ibikoresho cyangwa amahame
PTFE Resin Powder: Tetrafluoroethylene Polymerised under Pressure, Plunkett 1941
na Charlie
By'Inganda
12
0
0
0
0
0
PTFE Ring: Pressed Cold, Sintered Out of the Mould (Brubaker & Hanford 1946)
na Emma
Gukora Plastiki
16
0
0
0
0
0
PTFE Rod: a Plug Sintered in Boiling Retene Vapour (Brubaker & Hanford 1946)
na Emma
Gukora Plastiki
12
0
0
0
0
0
CC0 Umurenge rusange
Iyi blueprint yasohowe munsi ya CC0. Ushobora gukoporora, guhindura, gukwirakwiza no gukoresha nta kwemererwa.
Shyigikira Umuremyi ugura ibicuruzwa binyuze muri Blueprint ye Komisiyo y'Umuremyi byashyizweho n'Abacuruzi, cyangwa kora verisiyo nshya y'iyi Blueprint ukayinjiza nk'isano muri Blueprint yawe kugira ngo musangire inyungu.