Kerjasama
SENI
KECANTIKAN & KESEJAHTERAAN
KRAFTANGAN
BUDAYA & SEJARAH
HIBURAN
ALAM SEKITAR
MAKANAN & MINUMAN
KEJURUTERAAN TERBALIK
SAINS
SUKAN
TEKNOLOGI
BOLEH PAKAI
Heil and Esch · Public domain (1909)
Rubber Stoppers: Pará Rubber with Ceresine, Moulded and Cured (Heil & Esch 1909)
Laboratory rubber stoppers from a 1909 rubber factory's book of mixings: Pará rubber with ceresine wax, sulphur and magnesia, run out as a cord, cut to weight, pressed into moulds and cured.
Source: Heil & Esch, The Manufacture of Rubber Goods (1909), mixing No. 34 (p. 108) and the stopper method (p. 135). They give no cure time or temperature. Using smoked ball rubber as their Pará, and the mill, clamps and steam vessel, are ours. Picture: their page of mixings.
Pertengahan
1 day
Arahan
1
1
Weigh mixing No. 34
Weigh mixing No. 34
Weigh out 10,000 g Pará rubber, 2,000 g ceresine, 1,000 g sulphur and 100 g calcined magnesia (magnesia usta).
Bahan untuk langkah ini:
Bola getah salai10000 g
Lilin seresin2000 g
Serbuk sulfur1000 g
Magnesium oksida100 gAlatan diperlukan:
Neraca dua piring2
2
Mix on the rolls
Mix on the rolls
Work the rubber on the mixing rolls and work the ceresine, sulphur and magnesia into it until the mixing is even.
Alatan diperlukan:
Kilang getah dua penggelek3
3
Run a cord on the tube machine
Run a cord on the tube machine
Run the mixing through the tube machine as a cord of a size to suit the stoppers. It must be free from air bubbles, or the stoppers will be faulty after curing.
Alatan diperlukan:
Mesin tiub getah4
4
Cut pieces to weight
Cut pieces to weight
Cut the cord into pieces of the exact weight of one stopper plus 2 or 3 per cent, for what squeezes out of the mould.
Alatan diperlukan:
Pisau KrafNeraca dua piring5
5
Press into moulds and clamp
Press into moulds and clamp
Press each piece into a mould and clamp the small moulds very tightly in iron clips.
Alatan diperlukan:
Acuan pemvulkanan
Pengapit C6
6
Cure in steam
Cure in steam
Cure the clamped moulds in a steam heater (Heil & Esch also name the sulphur bath). They give no time or temperature for stoppers; then open the moulds and take out the stoppers.
Alatan diperlukan:
Autoklaf mejaAcuan pemvulkananBahan
4- 10000 gPemegang Tempat
- 2000 gPemegang Tempat
- 1000 gPemegang Tempat
- 100 gPemegang Tempat
Alatan Diperlukan
7- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
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