TheNjira yopangira zinthu za SMCndi imodzi mwaluso kwambiri mu galasi CHIKWANGWANI analimbitsa pulasitiki/composite zinthu akamaumba ndondomeko.The SMC akamaumba ndondomeko ali ndi ubwino zambiri, monga: zolondola mankhwala kukula, yosalala pamwamba, zabwino mankhwala maonekedwe ndi kukula repeatability, dongosolo zovuta akhoza kuumbidwa pa nthawi imodzi, processing yachiwiri sifunika kuwononga mankhwala, etc. Komabe, zoipa zolakwika zidzawonekeranso mu njira yopangira ma SMC, yomwe imawonetsedwa makamaka pazifukwa izi:
(ine)Kusowa zinthu: Kusowa kwa zinthu kumatanthauza kuti zigawo zopangidwa ndi SMC sizimadzazidwa kwathunthu, ndipo malo opangira zinthu amakhala kwambiri m'mphepete mwa zinthu za SMC, makamaka mizu ndi nsonga za ngodya.
(a) Kuchepa kwa zinthu zakuthupi
(b) Zinthu za SMC zili ndi madzi ochepa
(C) Kuthamanga kwa zipangizo zosakwanira
(d) Kuchiza msanga
Generation mechanism ndi njira zotsutsana nazo:
①Zinthu za SMC zitapangidwa ndi pulasitiki ndi kutentha, kusungunuka kwamphamvu kumakhala kwakukulu.Kulumikizana ndi kulimbitsa kusanamalizidwe, palibe nthawi yokwanira, kupanikizika, ndi voliyumu yodzaza nkhungu ndi kusungunuka.
②) Nthawi yosungiramo zinthu zopangira SMC ndi yayitali kwambiri, ndipo styrene imasinthasintha kwambiri, zomwe zimapangitsa kuchepa kwakukulu kwa kayendedwe kazinthu za SMC.
③ Phala la utomoni silimaviikidwa mu ulusi.Phala la utomoni silingayendetse ulusi kuti uziyenda pakuwumba, zomwe zimapangitsa kuchepa kwa zinthu.Chifukwa cha kusowa kwa zipangizo zomwe zimayambitsidwa ndi zifukwa zomwe zili pamwambazi, njira yothetsera vutoli ndiyo kuchotsa zinthu zoumba izi podula zipangizo.
④Kusakwanira kwa chakudya kumabweretsa kusowa kwa zinthu.Njira yothetsera vutoli ndi kuwonjezera kuchuluka kwa chakudya moyenera.
⑤Pali mpweya wochuluka komanso zinthu zambiri zomwe zimasokonekera poumba.Yankho lake ndikuwonjezera moyenerera kuchuluka kwa utsi;moyenerera kuonjezera malo odyetserako chakudya ndi burp kwa nthawi yoyeretsa nkhungu;moyenera kuonjezera kuthamanga akamaumba.
⑥Kuponderezedwa kwachedwa kwambiri, ndipo zida zowumbidwa zatha kulumikizana ndi kuchiritsa musanadzaze nkhungu.⑦ Ngati kutentha kwa nkhungu ndikokwera kwambiri, kulumikizana ndi kuchiritsa kumapita patsogolo, kotero kutentha kumayenera kuchepetsedwa moyenera.
(2)Stoma.Pali mabowo ang'onoang'ono okhazikika kapena osakhazikika pamtunda wa mankhwala, omwe ambiri amapangidwa pamwamba ndi pakati pa makoma opyapyala a mankhwalawa.
Generation mechanism ndi njira zotsutsana nazo:
①Zida zopangira za SMC zimakhala ndi mpweya wochuluka komanso zomwe zimasokonekera ndi zazikulu, ndipo kutulutsa kwake sikosalala;kukhuthala kwa zinthu za SMC sizabwino, ndipo mpweya sungathe kuthamangitsidwa bwino.Zomwe zili pamwambazi zitha kuyendetsedwa bwino ndikuphatikiza kuchuluka kwa mpweya komanso kuyeretsa nkhungu.
②Malo odyetserako ndi aakulu kwambiri, moyenerera kuchepetsa malo odyetserako akhoza kuwongoleredwa.Mu ntchito yeniyeni, zinthu zaumunthu zingayambitsenso trachoma.Mwachitsanzo, ngati kupanikizika kuli koyambirira kwambiri, zingakhale zovuta kuti gasi atakulungidwa muzitsulo zowumbidwa atulutsidwe, zomwe zimapangitsa kuti pakhale zowonongeka monga pores pamtunda wa mankhwala.
(3)Warpage ndi deformation.Chifukwa chachikulu ndi kuchiritsa kosagwirizana kwa chigawo chowumba ndi kuchepa kwa mankhwala pambuyo pobowola.
Generation mechanism ndi njira zotsutsana nazo:
Pakuchiritsa kwa utomoni, kapangidwe kake kake kamasintha, kumapangitsa kuti voliyumu ikhale yochepa.Kufanana kwa machiritso kumapangitsa kuti mankhwalawa azikhala opindika mpaka mbali yoyamba yochiritsidwa.Kachiwiri, coefficient yowonjezera kutentha kwa mankhwalawa ndi yaikulu kuposa nkhungu yachitsulo.Chogulitsacho chikazizira, kutsika kwake kwa njira imodzi kumakhala kwakukulu kuposa kutsika kwa kutentha kwa njira imodzi ya nkhungu.Kuti izi zitheke, njira zotsatirazi zimatsatiridwa kuti athetse vutoli:
① Chepetsani kusiyana kwa kutentha pakati pa nkhungu zapamwamba ndi zotsika, ndikupanga kugawa kwa kutentha momwe mungathere;
②Gwiritsani ntchito zozizira kuti muchepetse kupindika;
③Onjezani kukakamiza kowumbidwa moyenera, onjezerani kaphatikizidwe kazinthu, ndikuchepetsa kuchepa kwazinthu;
④ Kutalikitsa nthawi yosungira kutentha moyenera kuti muchepetse kupsinjika kwamkati.
⑤Sinthani kuchuluka kwa kuchepa kwa zinthu za SMC.
(4)Kutuluka matuza.Kuphulika kwa semicircular pamwamba pa mankhwala ochiritsidwa.
Generation mechanism ndi njira zotsutsana nazo:
Zitha kukhala kuti zinthuzo sizimachiritsidwa bwino, kutentha kwa m'deralo ndi kwakukulu kwambiri, kapena zinthu zosasunthika zomwe zili muzinthuzo zimakhala zazikulu, ndipo misampha ya mpweya pakati pa mapepala, yomwe imapangitsa kuti semicircular ikhale pamwamba pa mankhwala.
(①Mukawonjezera kukakamiza kowumba
(②Onjezani nthawi yosungira kutentha
(③) Chepetsani kutentha kwa nkhungu.
④Chepetsani malo otsegulira
(5)Mtundu wa pamwamba wa mankhwala ndi wosagwirizana
Generation mechanism ndi njira zotsutsana nazo:
①Kutentha kwa nkhungu sikofanana, ndipo gawolo ndilokwera kwambiri.Kutentha kwa nkhungu kuyenera kuyendetsedwa bwino;
②Kusayenda bwino kwa zinthu zomangira, zomwe zimapangitsa kuti pakhale kugawanika kwa ulusi wosiyanasiyana, nthawi zambiri zimatha kuwonjezera kukakamiza kopangira kuti kuwonjezere kusungunuka kwamadzi;
③Pigment ndi utomoni sizingasakanizidwe bwino ndikuphatikiza phala.
Nthawi yotumiza: May-04-2021
