Pakupangidwa kwa zigawo zapulasitiki, makulidwe a khoma la gawolo ndiye gawo loyamba lomwe liyenera kuganiziridwa, makulidwe a khoma la gawolo amatsimikizira zomwe zimapangidwira gawolo, mawonekedwe a gawolo, mphamvu ya jekeseni ya gawolo ndi mtengo wake. wa gawo.Zinganenedwe kuti kusankha ndi kupanga makulidwe a khoma la gawolo kumatsimikizira kupambana kapena kulephera kwa mapangidwe a gawolo.
Kukhuthala kwa khoma lagawo kuyenera kukhala kocheperako
Chifukwa cha mawonekedwe a pulasitiki ndi njira ya jekeseni,makulidwe a khoma la zigawo za pulasitiki ayenera kukhala mumtundu woyenera, osati woonda kwambiri, komanso wochuluka kwambiri.
Ngati makulidwe a khoma ndi woonda kwambiri, mbalizo zimabayidwa pamene kutuluka kwa kukana, kusungunuka kwa pulasitiki kumakhala kovuta kudzaza mtsempha wonse, ziyenera kukhala zida za jekeseni zapamwamba kuti zipeze kuthamanga kwapamwamba komanso kuthamanga kwa jekeseni.
Ngati makulidwe a khoma ndi wandiweyani kwambiri, mbali kuzirala nthawi kuwonjezeka (malinga ndi ziwerengero, mbali khoma makulidwe ukuwonjezeka ndi 1 nthawi, kuzirala nthawi 4), mbali akamaumba mkombero kuwonjezeka, mbali kupanga dzuwa ndi otsika;pa nthawi yomweyo, wandiweyani khoma makulidwe n'zosavuta chifukwa mbali kubala shrinkage, porosity, warpage ndi mavuto ena khalidwe.
Zida za pulasitiki zosiyanasiyana zimakhala ndi zofunikira zosiyana pa makulidwe oyenera a khoma la zigawo za pulasitiki, ndipo ngakhale opanga pulasitiki osiyanasiyana azinthu zapulasitiki zomwezo angakhalenso ndi zofunikira zosiyana za khoma.Zida zamapulasitiki zomwe zimagwiritsidwa ntchito nthawi zambiri za makulidwe oyenera a khoma zimawonetsedwa mu Gulu 1-1.Pamene makulidwe a khoma la zigawo za pulasitiki pafupi ndi malire apamwamba ndi otsika a mtengo wokwanira wa makulidwe a khoma, katswiri wa zomangamanga ayenera kupeza malangizo kwa wopanga pulasitiki.
Table 1-1 Kusankha makulidwe a khoma pamagawo apulasitiki
(gawo :mm)
Zinthu zazikulu zomwe zimatsimikizira makulidwe a khoma la gawo la pulasitikis:
1) Kaya mphamvu zamapangidwe a gawolo ndizokwanira.Nthawi zambiri, kukhuthala kwa khoma kumapangitsa kuti gawolo likhale lolimba.Koma makulidwe a khoma la magawo amaposa mitundu ina, chifukwa cha shrinkage ndi porosity ndi mavuto ena apamwamba, kuwonjezera makulidwe a khoma la zigawozo m'malo mwake kuchepetsa mphamvu za ziwalozo.
2) Kodi gawolo lingakane mphamvu ya ejection popanga.Ngati mbaliyo ndi yopyapyala kwambiri, imatha kupunduka mosavuta ndi ejection.
3) Kutha kukana kulimbitsa mphamvu panthawi ya msonkhano.
4) Pamene pali zolowetsa zitsulo, mphamvu zozungulira zoyikapo ndizokwanira.General zitsulo Ikani ndi ozungulira pulasitiki chuma shrinkage si yunifolomu, zosavuta kutulutsa maganizo ndende, otsika mphamvu.
5) Kutha kwa magawo kuti azimwaza molingana mphamvu zomwe zimakhudzidwa nazo.
6) Kaya mphamvu ya dzenje ndi yokwanira, mphamvu ya dzenje imachepetsedwa mosavuta chifukwa cha mphamvu ya ma fusion marks.
7) Pokwaniritsa zofunikira zomwe tafotokozazi, ndipo kuumba jekeseni sikungabweretse mavuto abwino, makulidwe a khoma la zigawo zapulasitiki ziyenera kukhala zazing'ono momwe zingathere, chifukwa kukhuthala kwa khoma sikungowonjezera mtengo wamtengo wapatali ndi kulemera kwake. gawo, komanso kuwonjezera gawo akamaumba mkombero, motero kuonjezera mtengo kupanga.Chithunzi 1-3 chikuwonetsa mgwirizano pakati pa makulidwe a khoma ndi nthawi yozizira ya gawo lapulasitiki la ABS.
Pofuna kuwonetsetsa ndikusintha mphamvu zina, akatswiri opanga zinthu nthawi zambiri amasankha makulidwe a khoma.
M'malo mwake, si njira yabwino kwambiri yowonetsetsera ndikuwongolera mphamvu ya gawo posankha makulidwe a khoma lakuda.Mbali mphamvu akhoza bwino powonjezera kulimbikitsa, kupanga yokhota kumapeto kapena wavy mbali mbiri, etc. Izi osati amachepetsa zinyalala zinthu za gawo, komanso kufupikitsa jekeseni akamaumba mkombero nthawi ya gawo.
Uniform khoma makulidwe a zigawo
Kugawa kokwanira bwino kwa khoma la magawo kuli mu gawo lililonse la magawo a makulidwe a yunifolomu.Osafanana mbali khoma makulidwe zingachititse kuzirala osagwirizana ndi shrinkage wa mbali, chifukwa pamwamba shrinkage wa mbali, mkati porosity, warpage ndi mapindikidwe mbali, dimensional zolondola n'zovuta kuonetsetsa kupunduka.
Zitsanzo za zigawo za pulasitiki zomwe zimakhala ndi mawonekedwe ofanana ndi makulidwe a khoma zikuwonetsedwa mu Chithunzi 1-4.
Ngati mbali yunifolomu khoma makulidwe sizingatheke kupeza, ndiye osachepera ayenera kuonetsetsa kuti mbali khoma makulidwe ndi khoma woonda pa yosalala kusintha, kupewa lakuthwa kusintha khoma makulidwe a mbali.Kusintha kwachangu mu makulidwe a khoma la zigawo kumakhudza kutuluka kwa pulasitiki kusungunuka, zosavuta kutulutsa zizindikiro zopanikizika kumbuyo kwa pulasitiki, zomwe zimakhudza maonekedwe a mankhwala;nthawi yomweyo zosavuta kutsogolera kupsinjika maganizo ndende, kuchepetsa mphamvu ya mbali pulasitiki, kukhala kovuta kuti mbali kupirira katundu kapena kukhudza kunja.
Magawo anayi a makulidwe a khoma la kapangidwe ka khoma losagwirizana monga momwe tawonera pa Chithunzi 1-5.
Mapangidwe oyipa kwambiri a khoma akuwonetsedwa mu a), pomwe pali kusintha kwakukulu mu makulidwe a khoma la gawolo;
Mapangidwe abwinoko a khoma akuwonetsedwa mu Chithunzi b) ndi c ), makulidwe a khoma pakusintha kwa yunifolomu ya khoma lopyapyala, nthawi zambiri, kutalika kwa malo osinthika kumakhala katatu kukula kwake;
The bwino khoma makulidwe kapangidwe asonyezedwa d), osati mbali khoma makulidwe yosalala kusintha, komanso mbali khoma makulidwe ntchito dzenje kamangidwe, osati kuonetsetsa kuti mbali si kufota, komanso kuonetsetsa mphamvu ya zigawo.
Mafunso ambiri pazigawo za pulasitiki khoma makulidwe, chonde omasuka kulankhula nafe paadmin@chinaruicheng.com.
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Nthawi yotumiza: Dec-22-2022