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ÀṢÀ ÀTI ÌTÀN
ÌṢERÉ
ÀYÍKÁ
OÚNJẸ ÀTI OHUN MÍMU
REVERSE ENGINEERING
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ÌMỌ̀-Ẹ̀RỌ
ÀWỌN OHUN WÍWỌ̀
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.
Àárín
1 day
Ìlànà
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).
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Bọ́ọ̀lù rọ́bà tí a fi èéfín gbẹ10000 g
Ìda ceresine2000 g
Ìyẹ̀fun sulfur1000 g
Ọ́sáídì magnesium100 gÀwọn irinṣẹ́ tí a nílò:
Òǹwọ̀n ìdọ́gba2
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.
Àwọn irinṣẹ́ tí a nílò:
Ẹ̀rọ rọ́bà olórólà méjì3
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.
Àwọn irinṣẹ́ tí a nílò:
Ẹ̀rọ ọ̀pá rọ́bà4
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.
Àwọn irinṣẹ́ tí a nílò:
Ọ̀bẹ Iṣẹ́ Ọwọ́Òǹwọ̀n ìdọ́gba5
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.
Àwọn irinṣẹ́ tí a nílò:
Mọ́ọ̀dù ìsè rọ́bà
Ìdìmú onídàbí 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.
Àwọn irinṣẹ́ tí a nílò:
Autoclave orí tábìlìMọ́ọ̀dù ìsè rọ́bàÀwọn ohun-èlò
4- Àyè
- 2000 gÀyè
- 1000 gÀyè
- 100 gÀyè
Àwọn irinṣẹ́ tó nílò
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