IṢẸ́ ỌNÀ
ẸWÀ ÀTI ÌLERA
IṢẸ́ ỌWỌ́
ÀṢÀ ÀTI ÌTÀN
ÌṢERÉ
ÀYÍKÁ
OÚNJẸ ÀTI OHUN MÍMU
REVERSE ENGINEERING
SÁYẸ́ǸSÌ
ERÉ ÌDÁRAYÁ
ÌMỌ̀-Ẹ̀RỌ
ÀWỌN OHUN WÍWỌ̀
Natural Rubber Tubing, Bands and Sheet: Sulfur-Cured with Heat
Raw rubber goes soft and sticky when warm; mixed with sulfur and heated it cures firm and elastic (Goodyear, 1839; Hancock's patent, 1843). Mill smoked sheet with sulfur, then either press it flat and cure it as sheet, or extrude it as a tube, cure the tube on a mandrel, and slice it across into rubber bands.
The picture: our diagram of the three products.
Ilọsíwájú
A day
Ìlànà
1
1
Mill in the sulfur
Mill in the sulfur
Pass the smoked rubber sheet through the two-roll mill until it is soft and even, then mill in the sulfur a little at a time.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Àwo rọ́bà tí a fi èéfín gbẹ1 kg
Ìyẹ̀fun sulfur30 gÀwọn irinṣẹ́ tí a nílò:
Ẹ̀rọ rọ́bà olórólà méjì
Òṣùwọ̀n Díjítà Ilé Ìdáná
Ìbọ̀wọ́ wẹ́lídìn2
2
Sheet: press and cure
Sheet: press and cure
For sheet, lay the compound in the mould and cure it in the heated press until a test piece springs back firm, not sticky.
Àwọn irinṣẹ́ tí a nílò:
Ẹ̀rọ ìtẹ̀mọ́lẹ̀ gbígbóná
Àwòṣe ìtẹ̀mọ́lẹ̀Ìbọ̀wọ́ wẹ́lídìn3
3
Tube: extrude
Tube: extrude
For tubing, feed the compound through the extruder with a tube die to make a long tube.
Àwọn irinṣẹ́ tí a nílò:
Ẹ̀rọ ìtújáde ṣíṣu
Ẹnu ìtújáde irin
Òṣùwọ̀n Kálípà Díjítà Ìnṣì 64
4
Cure on mandrels
Cure on mandrels
Slide lengths of tube onto rods and cure them in the oven with heat until firm and elastic.
Àwọn irinṣẹ́ tí a nílò:
Ọ̀pá irin róbótó
Ààrò ìrọ̀ irinÌbọ̀wọ́ wẹ́lídìn5
5
Slice bands
Slice bands
Keep some tube as tubing. For rubber bands, slice cured tube across into narrow rings.
Àwọn irinṣẹ́ tí a nílò:
Ọ̀bẹ Iṣẹ́ Ọwọ́Òṣùwọ̀n Kálípà Díjítà Ìnṣì 6Àwọn ohun-èlò
2- Àyè
- 30 gÀyè
Ìtọ́nisọ́nà yìí ń ṣe
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