UBUHANZI
UBWIZA N'UBUZIMA
UBUKORIKORI
UMUCO N'AMATEKA
IMYIDAGADURO
IBIDUKIKIJE
IBIRIBWA N'IBINYOBWA
UBWUBATSI BUSUBIRA INYUMA
UBUMENYI
SIPORO
IKORANABUHANGA
IBYAMBARWA
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.
Hejuru
A day
Amabwiriza
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.
Ibikoresho by'iyi ntambwe:
Urupapuro rw'umupira rwumishijwe n'umwotsi1 kg
Ifu ya sufuru30 gIbikoresho bikenewe:
Urusyo rw'umupira rufite roulo ebyiri
Iminzani ya Digitale yo mu Gikoni
Uturindantoki two gukomeza ibyuma2
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.
Ibikoresho bikenewe:
Ikandagira rishyushye ryo kubumba hakandwa
Ikibumbiro cyo gukandaUturindantoki two gukomeza ibyuma3
3
Tube: extrude
Tube: extrude
For tubing, feed the compound through the extruder with a tube die to make a long tube.
Ibikoresho bikenewe:
Imashini isohora pulasitiki
Icyuma cyo gusohoramo
Ikigereranyo cya Digitale cy'Amasentimetero 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.
Ibikoresho bikenewe:
Uruti rw'icyuma
Itanura ryo koroshya ibyumaUturindantoki two gukomeza ibyuma5
5
Slice bands
Slice bands
Keep some tube as tubing. For rubber bands, slice cured tube across into narrow rings.
Ibikoresho bikenewe:
Icyuma cy'UbukorikoriIkigereranyo cya Digitale cy'Amasentimetero 6Ibikoresho
2- Umwanya
- 30 gUmwanya
Ibikoresho bikenewe
11- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
Iki gishushanyo gikora
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