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Ebonite Rod: Rubber and an Equal Weight of Sulphur, Cured Hours in the Heat, Goodyear 1851
Ebonite is rubber with a great deal of sulphur. Nelson Goodyear's patent (1851) uses about equal weights of the two, far more than for soft rubber, moulded and then cured at 260–275 °F for three to six hours or longer. It comes out hard and stiff.
The picture: ebonite objects (photo by FBQ, Wikimedia Commons, CC BY-SA 3.0).
Katamtaman
1 day
Mga Tagubilin
1
1
Weigh equal parts
Weigh equal parts
Weigh the rubber and the sulphur, about equal parts by weight. Much less sulphur will not make it hard.
Mga materyales para sa hakbang na ito:
Pinausukang plantsa ng goma500 g
Pulbos na asupre500 gMga kailangang kasangkapan:
Timbangang panimbang2
2
Work the sulphur in
Work the sulphur in
Mix the sulphur into the rubber the usual way rubber is compounded: on the rubber mill, until the sulphur is spread evenly through.
Mga kailangang kasangkapan:
Two-roll na gilingan ng goma3
3
Mould the rod
Mould the rod
Press the compound firmly into a tube to shape it as a rod.
Mga kailangang kasangkapan:
Tubong asero na 12 mm4
4
Cure it
Cure it
Heat it to 260–275 °F (about 127–135 °C) and hold it there three to six hours, or longer. Let it cool and push out the hard rod.
Mga kailangang kasangkapan:
Hurno
TermometroMga Materyales
2- Placeholder
- 500 gPlaceholder
Mga Kinakailangang Kasangkapan
5- Placeholder
- Placeholder
- Placeholder
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