Liquid silicone rubber (LSR) etabuddwa n’ekirungo ekifuumuula (physical oba chemical), era mu kiseera ky’okubugumya n’okubumba mu nvuba mu kibumba, ekirungo ekifuumuula kikola ggaasi, bwe kityo ne kikola ensengekera y’okufuumuuka kwa microcellular ey’enjawulo era ennungi.
1. Okuteekateeka ebintu ebisookerwako:
Kozesa bbiri-ekitundu kya silikoni eky’amazzi (A&B ebitundu). Ekirungo kya kapiira ekya base kitera okuba pre-okutegekebwa omugabi. Ekitundu A kitera okubaamu ekiziyiza, ate ekitundu B kirimu ekirungo ekiyunga. Okusinziira ku nkola y’omulimu gw’ekintu ekisembayo (nga density, obukaluba, ne langi), kiyinza okwetaagisa okwongerako langi ezisiigiddwa, ebyuma ebijjuza ebbugumu (nga alumina), oba ebirungo ebiziyiza ennimi z’omuliro n’ebirungo ebirala eby’ongera ku kirungo kya kapiira akasookerwako. Ebirungo bino ebigattibwamu bitera okutabulwa kyenkanyi n’ekitundu A oba ekitundu B nga bukyali.
2. FOAMING AGENT Enyanjula (Foaming Agent Enyanjula) .Eno ye link esinga obukulu. Okusinziira ku kika ky’ekirungo ekifuumuula, okusinga kigabanyizibwamu amakubo abiri ag’ekikugu:
Enkola: Okukola CO2 CO2 .: Liquid CO2 efumbiddwa era n’enyigirizibwa okutuuka ku mbeera ey’okuvumirira ennyo okuyita mu byuma ebiweereddwayo. Okupima n’okukuba empiso: Okuyita mu ppampu entuufu ey’okupima ey’okunyigiriza, omuwendo ogugere ogwa CO2 ogw’amaanyi (supercritical CO2) gufuyirwa mu kkubo ly’okukulukuta kw’ekitundu kya A erya silikoni ow’amazzi. Okutabula okukyukakyuka (static mixing): Ekitundu A (ekirimu edda SCCO2) n’ekitundu B bitabulwa bulungi nga biyita mu kitabulwa ekikyukakyuka (static mixer). Mu kiseera kino, SCCO2 esaanuuse mu ngeri y’emu mu kirungo kya kapiira wansi wa puleesa enkulu, n’ekola omutabula gumu ogw’ekimu-phase. Enkola yonna ekuumibwa wansi wa puleesa enkulu okuziyiza CO2 okutoloka nga bukyali.
b) Ekirungo ekifuumuula eddagala erifuumuuka:Kozesa ebirungo ebifuumuula eddagala ebivunda ebbugumu, nga azodicarbonamide (AC foaming agent). Enkola: PRE-Mutabule butto w’ekirungo ekifuumuula mu ngeri ey’enkanankana n’ekitundu A oba ekitundu B mu kyuma ekisika. Okukakasa nti ekintu kibeera kikyamu-Free, vacuum deaeration etera okwetaagisa oluvannyuma lw’okutabula okuggya empewo eyatongozebwa mu nkola y’okusika.
3.Okukyusakyusa n'okufuumuuka:
Physical Foaming: Oluvannyuma lw’ekirungo kya kapiira okufuyirwa mu kisenge ky’ekibumbe, puleesa efuluma, era CO2 ow’amaanyi ennyo asaanuuse mu kirungo kya kapiira n’afuumuuka mangu, n’akola obutoffaali obuyitibwa bubble nuclei. Mu kiseera kino, ebbugumu eringi lireeta vulcanization ne cross-ebiyungo ebiyunga mu silikoni kapiira, okusiba ensengekera y’ekiwujjo n’obutoffaali obukola.
Okufuumuuka kw’eddagala: Ebbugumu eringi ery’ekibumbe lireetera ekirungo ekifuumuula eddagala okuvunda, ne kikola ggaasi (nga n2, CO2). Mu kiseera kye kimu, omupiira gwa silikoni gufuulibwa vulcanized, era ggaasi ziteekebwa mu mutimbagano gwa kapiira ogukoleddwa, ne zikola obutoffaali.
4. Okukendeeza ku bunkenke:Oluvannyuma lw’okutambula kw’okufuumuula okw’ekika kya Vulcanization okuggwa (ebiseera ebisinga mu sikonda makumi ga sikonda okutuuka ku ddakiika eziwerako), ggulawo ekibumbe era oggyewo ekintu. Olw’obuzito obutono obwa LSR, ebintu ebiseera ebisinga tebinywerera ku kibumba era nga byangu nnyo okugoba.
5. Post-Okuwonya (Okukubisaamu okw'okubiri) .(Post-okuwonya) Ebintu ebifuukuuse oluvannyuma lw’okuggyibwako omusaayi bitera okwetaaga okuyita mu post-okuwonya mu oven ku bbugumu nga 150℃- 200℃okumala essaawa 1-2.