Liquid silicone rubber (LSR) inosanganiswa neanopupuma agent (yemuviri kana makemikari), uye panguva yekudziya uye vulcanization yekuumba maitiro muforoma, iyo inopupuma inogadzira gasi, nekudaro ichigadzira yunifomu uye yakanaka microcellular foaming chimiro.
1. Gadziriro Yezvinhu:
Shandisa-zvikamu zviviri zvemvura silikoni rabha (A&B components). Base rubber compound inowanzofanogadzirirwa-nemutengesi. Chikamu A chinowanzo ine catalyst, uye Chikamu B chine chinosanganisa. Zvichienderana nemashandiro ekuita kwechigadzirwa chekupedzisira (senge density, kuomarara, uye ruvara), zvingave zvakafanira kuwedzera mavara anonamira, thermal conductive fillers (senge alumina), kana zvinodzosa moto uye zvimwe zvinowedzera kune base rubber compound. Izvi zvinowedzera zvinowanzosanganiswa zvakaenzana neChikamu A kana Chikamu B pachine nguva.
2. Sumo yemumiriri weFoaming (Sumo yemumiriri wefuro)iyi ndiyo inonyanya kukosha link. Zvinoenderana nerudzi rweanopupa mumiririri, inonyanya kukamurwa kuita mbiri tekinoroji nzira:
Maitiro: Kugadzira supercritical CO₂: Liquid CO₂ inopisa uye inomanikidzwa kune supercritical state kuburikidza nemidziyo yakatsaurirwa. Metering uye jekiseni: Kuburikidza neiyo chaiyo yakakwirira-kudzvanya metering pombi, imwe huwandu hwepamusoro-soro CO₂ inobaiwa muA component flow path ye liquid silicone rabha. Kusanganiswa kwakasimba: Chikamu A (chatova ne scCO₂) uye Chikamu B zvakanyatsosanganiswa kana ichipfuura nemusanganisi wakamira. Zvichakadaro, scCO₂ inonyungudika zvakafanana mukomboni yerabha pasi pekumanikidzwa kukuru, ichiita imwe-chikamu chehomogeneous musanganiswa. Iyo yose nzira inochengetedzwa pasi pekumanikidzwa kwakanyanya kudzivirira CO₂ kutiza nguva isati yakwana.
b) Kemikari inopupa furo mumiririri:Shandisa zvinopisa zvinopisa makemikari anoita seazodicarbonamide (AC foaming agent). Maitiro: Pre{1}}sanganisa hupfu hunopupa zvakaenzana neComponent A kana Component B mumudziyo unonyandura. Kuona kuti chigadzirwa hachina kukanganisa-pasina, vacuum deaeration inowanzodiwa mushure mekusanganisa kubvisa mweya waunzwa panguva yekuvhetemesa.
3.Vulcanization uye kupupa furo:
Kupupa kwepanyama: Mushure mekunge musanganiswa werabha waiswa mugomba remuvhu, kudzvanywa kunoburitswa, uye iyo yakanyanya kunyungudika CO₂ yakanyungudika mukomboni yerabha inokurumidza kupera, ichiita bubble nuclei. Zvichakadaro, tembiricha yepamusoro inokonzeresa vulcanization uye kuyambuka-kubatanidza kuita musilicone rabha, kukiya chimiro chebubble uye kugadzira maseru.
Kemikari inoputika furo: Kupisa kwakanyanya kwe mold kunoita kuti kemikari inopupuma iparare, ichigadzira magasi (akadai seN₂, CO₂). Panguva imwecheteyo, iyo silicone rubber inoputika, uye magasi akavharidzirwa muakagadzirwa rubber network, achigadzira masero.
4. Demolding:Mushure mekunge vulcanization yekuputira kutenderera kwapera (kazhinji mukati memakumi emasekonzi kusvika kumaminitsi akati wandei), vhura mold uye bvisa chigadzirwa. Nekuda kweiyo yakaderera viscosity yeLSR, zvigadzirwa kazhinji hazvibatike kune mold uye zviri nyore kugadzira.
5. Post{1}kurapwa (secondary vulcanization)(Post{{0}Kuporeswa) zvigadzirwa zvine furo mushure mekudhirowa kazhinji zvinoda kuiswa{{1}kurapwa muovheni patembiricha ingangoita 150℃- 200 kwemaawa 1-2.