Irabha ye-silicone ewuketshezi (LSR) ixubene ne-ejenti enegwebu (engokwenyama noma yamakhemikhali), futhi ngesikhathi senqubo yokushisa kanye ne-vulcanization ekubunjweni, i-ejenti enegwebu ikhiqiza igesi, ngaleyo ndlela yakhe iyunifomu kanye nesakhiwo esihle se-microcellular foaming.
1. Ukulungiswa Kwempahla:
Sebenzisa-izingxenye ezimbili zerabha ye-silicone enguketshezi (izingxenye ze-A&B). Inhlanganisela yerabha eyisisekelo ivamise ukulungiselelwa-ngaphambi ngumphakeli. Ingxenye A ngokuvamile iqukethe i-catalyst, futhi Ingxenye B iqukethe i-ejenti exhumanisayo. Kuye ngezidingo zokusebenza komkhiqizo wokugcina (njengokuminyana, ubulukhuni, kanye nombala), kungase kudingeke ukuthi kwengezwe ama-paste ombala, izicwenga ezishisayo ezishisayo (njenge-alumina), noma izinqamuleli zamalangabi nezinye izithasiselo kwinhlanganisela yenjoloba eyisisekelo. Lezi zithako ngokuvamile zixutshwa ngokulinganayo neNgxenye A noma Ingxenye B kusengaphambili.
2. Isingeniso Se-ejenti Egcwele Amagwebu (Isingeniso se-ejenti enegwebu)lesi isixhumanisi esibaluleke kakhulu. Ngokusho kohlobo lwe-ejenti yokugwedla, ihlukaniswe ikakhulukazi imizila emibili yobuchwepheshe:
Inqubo: Ikhiqiza i-CO₂ ebaluleke kakhulu: I-Liquid CO₂ iyashiswa futhi icindezeleke esimweni esibucayi kakhulu ngokusebenzisa imishini ezinikele. Ukulinganisa kanye nomjovo: Ngephampu yemitha yokucindezela ephezulu-ephezulu, inani elithile le-CO₂ ebucayi kakhulu lijovwa ku-A ingxenye yendlela yerabha ewuketshezi ye-silicone. Ukuxuba okuqinile: Ingxenye A (esevele iqukethe i-scCO₂) kanye neNgxenye B zixutshwe kahle lapho zidlula kumxube omile. Ngaleso sikhathi, i-scCO₂ incibilika ngokufanayo esakhiweni senjoloba ngaphansi kwengcindezi ephezulu, yakhe-isigaba esisodwa sengxube ye-homogeneous. Yonke inqubo igcinwa ngaphansi kwengcindezi ephezulu ukuvimbela i-CO₂ ekuphunyukeni ngaphambi kwesikhathi.
b) Ikhemikhali ekhipha amagwebu:Sebenzisa ama-agent amakhemikhali afaka amagwebu abola ngokushisa, njenge-azodicarbonamide (i-AC foaming agent). Inqubo: Ngaphambi{1}}xuba i-ejenti ekhihliza igwebu powder ngokulinganayo Nengxenye A noma Ingxenye B kudivayisi enyakazayo. Ukuqinisekisa ukuthi umkhiqizo awunasici{3}}awunasici, ivacuum deaeration ngokuvamile iyadingeka ngemva kokuxutshwa ukuze kukhishwe umoya owethulwe ngesikhathi sokunyakazisa.
3.Ukwenziwa i-vulcanization kanye namagwebu:
Igwebu elibonakalayo: Ngemva kokuba inhlanganisela yenjoloba ijovwe emgodini wesikhunta, ukucindezela kuyakhululwa, futhi i-CO₂ ebaluleke kakhulu ehlakazwe esakhiweni senjoloba iyahwamuka ngokushesha, yenze ama-bubble nuclei. Ngaleso sikhathi, amazinga okushisa aphezulu abangela ukonakala kanye{1}}nokuxhumanisa ukusabela kwerabha ye-silicone, ukukhiya ukwakheka kwebhamuza nokwenza amaseli.
Igwebu lamakhemikhali: Izinga lokushisa eliphezulu lesikhunta libangela ukuba i-ejenti enegwebu yamakhemikhali ibole, ikhiqize amagesi (afana ne-N₂, CO₂). Ngesikhathi esifanayo, i-rubber ye-silicone ifakwe i-vulcanized, futhi amagesi ahlanganiswe kunethiwekhi yenjoloba eyakhiwe, edala amaseli.
4. Ukubhidliza:Ngemuva kokuthi umjikelezo we-vulcanization we-foaming usuqediwe (imvamisa phakathi kwemizuzwana eyishumi kuya emaminithini ambalwa), vula isikhunta bese ususa umkhiqizo. Ngenxa ye-viscosity ephansi ye-LSR, imikhiqizo ngokuvamile ayinamathele kusikhunta futhi kulula ukuyidiliza.
5. Ukwelapha{1}okuthunyelwe (ukwenziwa kabi kwesibili)(Okuthunyelwe{{0}Ukwelapha) imikhiqizo enegwebu ngemva kokudilizwa ngokuvamile idinga ukuthuthwa{1}}ukuphulukiswa kuhhavini ezingeni lokushisa elicishe libe ngu-150℃- 200 amahora angu-1-2.