He taahiraa nui te whakaranu rapa i roto i te hanga i ngā momo hua rapa. E rua ngā mīhini matua e whakahaere ana i tēnei mara: ko te mīhini whakaranu ā-roto (pēnei i te mīhini whakaranu Banbury) me te mira hurihuri-rua tuwhera. Ahakoa e rua ngā whāinga he hora i ngā tāpiringa ki roto i te turanga rapa, he rerekē rawa ngā mātāpono whakahaere, ngā tikanga, me ngā putanga. Kei Haina te kaiwhakarato whāngai rīpene rapa roa kounga teitei, e whakamārama ana tēnei tuhinga i ngā rerenga tukatuka taahiraa-i-te-taahiraa mō ia mea.
Te Tukanga Tukatuka Ranu Ā-roto
Ka mahi te mīhini whakaranu ā-roto hei pūnaha whakaranu kati, kaha-teitei. Ka tīmata te tukanga mā te whakamahana i te rūma whakaranu ki te 50–80°C pea, me te whakarite kia ma ngā rotors. Muri iho, ka whāngaihia te polymer rapa (hei tauira, te rapa maori, te SBR rānei) mā roto i te hopper. Ka heke te rama, ka pēhia, ā, ka tīmata te hurihuri o ngā rotors i ngā tere rerekē (te nuinga o te 20–60 rpm). Ka puta te wera i te kutikuti me te waku kaha, te kaihanga roera rapa muka waro, te whakangawari i te rapa i roto i te 1–2 meneti.
I muri i te pakaru o te pūhui, ka hiki ake te kaiwhakahaere i te hipi ka tāpirihia ngā tāpiringa totoka – te pango waro, te silica, ngā hinu, me ngā āwhina tukatuka – mā roto i te hopper i roto i tētahi raupapa kua whakaritea. He maha ngā wā ka whai mai ko te waikura konutea me te waikawa stearic, kātahi ka tāpirihia ngā whakatere me te whanariki i muri mai (ki te kore e whakamahi i tētahi tukanga whakaranu e rua ngā wāhanga hei karo i te wera). Ka tukuna anō te hipi ki raro, ā, ka haere tonu te whakaranu mō te 3–5 meneti katoa. Ka eke pea te pāmahana o te rūma ki te 120–160°C. Mā te whakawhiti wera pai mā roto i ngā koti whakamatao wai ka ārai i te wera nui.
Kia oti te horapa, ka whakatuwherahia e te kaiwhakahaere te tatau maturuturu i raro, ā, ka tukuna te ranunga kua whakaranua hei puranga. he roera rapa silicone i hangaia ki Haina, ko te huringa katoa e 5-8 meneti te roa. He tino pai te mīhini whakaranu ā-roto ki te whakaputa nui, e whakarato ana i te horapa ōrite, te whakaiti i te puehu, me te iti ake o ngā whakaritenga mahi. Heoi, kāore e taea te whakauru ngāwari i ngā kai e pāngia ana e te pāmahana me te kore he raupapatanga tika.
Te Tukanga Tukatuka o te Mira Tuwhera (Mira Huri-Rua)
Kei roto i te mira tuwhera e rua ngā rōra whakapae hurihuri-whakamuri me te āputa me te ōwehenga waku e taea te whakarite. He mea nui te whakamahana i ngā rōra ki te 40–60°C hei piri. Ka tīmata te tukanga mā te whāngai i te rapa mata ki roto i te nip (te āputa i waenga i ngā rōra). Ka hangaia e te rapa he peeke hurihuri ka takai ki te rōra o mua. Ka tapahia ā-ringa e te kaiwhakahaere mira, ka whakapiko, ka whāngai anō i te rapa hei whakatairanga i te pakaru me te whakangawari – he tukanga e kiia nei ko te "mira" e 3–5 meneti te roa.
Kātahi ka tāpirihia mārire ngā tāpiringa. Ka ruia ngā paura pēnei i te pango waro ki runga i te taha hurihuri, ā, ka ringihia mārire ngā hinu kia kore ai e paheke. Kāore i rite ki te mīhini whakaranu kua kati, ka whakamahia tonutia e te kaiwhakahaere he spatula, he maripi rānei hei kuti i te ranunga, hei whakapiko, hei hanga i tētahi "taha hurihuri" hei whakauru i ngā rauemi. Mō te whakaranu pai, ka taea e te kaiwhakahaere te mahi i te "whakakotahitanga whakawhiti" (te tapahi me te huri i te pepa) te "whakapiko tapatoru" rānei (te whakapiko kia rite ki te āhua tapatoru). Ka whakawhāitihia haeretia te āputa mira hei whakanui ake i te kutikuti.
Kia puta te horapa ōrite o ngā kai katoa (i muri i te 10–20 meneti te roa), ka whakatakotoria te ranunga hei rīpene haere tonu, ka tapahia rānei kia rite ki ngā papa. He ā-ringa te whakahaere pāmahana – mā te rere o te wai i roto i ngā rōra ka tangohia te wera, engari ka wera rawa pea mēnā ka roa te whakaranu. Ka taea e te mira tuwhera te whakamahi i ngā puranga iti, ngā huringa tae, me ngā ranunga tairongo (hei tauira, ko ērā he tere rawa ngā whakatere). Heoi, me nui te pūkenga o te kaiwhakahaere, ka tūpono ngā kaimahi ki te puehu me te wera, ā, he iti ake te hua.
Ngā Rerekētanga Matua o te Rere Tukanga
Āhuatanga o te Mīra Tuwhera o te Ranu ā-Roto
Te wā huringa 5–8 meneti 10–20 meneti
Te kaha o te mahi Iti (aunoa) Teitei (ā-ringa)
Te pānga ki te puehu Iti rawa Te hiranga
Te whakahaere pāmahana Tino pai (kua hipokina ki te koti) Taurite
Rahi o te puranga Nui (50–500 kg) Iti (1–50 kg)
Hei whakarāpopototanga, ko te mīhini whakaranu ā-roto te mea e pai ake ana mō te whakaranu nui, whai hua, me te ma, ko te mira tuwhera ia e kore e taea te whakamahi mō ngā puranga iti, ngā matū whakaranu motuhake, me ngā mahi taiwhanga. He maha ngā wheketere e whakamahi ana i ngā mea e rua i te raupapa: te whakaranu ā-roto mō te tohatoha tuatahi, ā, muri iho ko te mira tuwhera mō te whakamatao, te tāpiri i ngā mea whakaora, me te whāriki whakamutunga. Mā te mārama ki ēnei tikanga ka taea e ngā kaihanga whakaranu te whiriwhiri i te taputapu tika mō ia mahi.
Wā tuku: Paenga-whāwhā-03-2026
