Chifukwa mitundu yosiyanasiyana yakufa yakhala ikugwiritsidwa ntchito m'magawo ambiri, kuphatikiza ndi chitukuko chaukadaulo wopanga nkhungu m'zaka zino, pakhala kusintha kwina ndi chitukuko.
Chifukwa chake, m'chigawo chino, malamulo opangira ma vacuum suction akamafa akufotokozedwa mwachidule.Mapangidwe a nkhungu yopangira pulasitiki ya vacuum imaphatikizapo kukula kwa batch, zida zomangira, mikhalidwe yolondola, kapangidwe ka mawonekedwe a geometric, kukhazikika kwazithunzi ndi mawonekedwe apamwamba.
1. Kwa kuyesa kukula kwa batch, kutulutsa kwa nkhungu kumakhala kochepa, ndipo kumatha kupangidwa ndi matabwa kapena utomoni.Komabe, ngati nkhungu yoyeserayo ndikupeza zambiri za kuchepa, kukhazikika kwa mawonekedwe, ndi nthawi yozungulira ya chinthucho, nkhungu imodzi yokha iyenera kugwiritsidwa ntchito poyesera, ndipo ikhoza kutsimikiziridwa kuti ikugwiritsidwa ntchito popanga zinthu.Nthawi zambiri nkhungu zimapangidwa ndi gypsum, copper, aluminium, kapena aluminiyamu-zitsulo alloys, ndipo utomoni wa aluminium sugwiritsidwa ntchito kawirikawiri.
2. Mapangidwe a mawonekedwe a geometric.Mukamapanga, nthawi zonse ganizirani kukhazikika kwa mawonekedwe ndi mawonekedwe apamwamba.Mwachitsanzo, mapangidwe azinthu ndi kukhazikika kwa mawonekedwe amafunikira kugwiritsa ntchito nkhungu zazikazi (zoumba za concave), koma zopangidwa zokhala ndi gloss zapamwamba zimafunikira kugwiritsa ntchito nkhungu zachimuna (zoumba zowoneka bwino).Mwanjira imeneyi, wogula pulasitiki aziganizira zonse za Point kuti malondawo athe kupangidwa pansi pamikhalidwe yabwino.Zochitika zatsimikizira kuti mapangidwe omwe sagwirizana ndi zochitika zenizeni zogwirira ntchito nthawi zambiri amalephera.
3. Kukhazikika kwapakatikati.Pakuumba ndondomeko, kukhudzana pamwamba pa pulasitiki mbali ndi nkhungu ndi bwino kuposa dimensional bata la gawo kusiya nkhungu.Ngati makulidwe a zinthuzo akuyenera kusinthidwa m'tsogolomu chifukwa cha kuuma kwa zinthuzo, nkhungu yamphongo ikhoza kusinthidwa kukhala nkhungu yachikazi.The dimensional kulolerana kwa zigawo za pulasitiki sayenera kuchepera 10% ya shrinkage.
4. Pamwamba pa gawo la pulasitiki, momwe zinthu zopangidwira zimatha kuphimba, mawonekedwe a pamwamba a mawonekedwe a pulasitiki ayenera kupangidwa mogwirizana ndi nkhungu.Ngati n'kotheka, musakhudze pamwamba pa pulasitiki ndi nkhungu pamwamba.Zili ngati kupanga mabafa ndi machubu ochapira okhala ndi nkhungu zoipa.
5. Kusintha.Ngati m'mphepete mwa pulasitiki wadulidwa ndi macheka opingasa, payenera kukhala 6 mpaka 8 mm kutalika kwake.Ntchito zina zovala, monga kugaya, kudula laser, kapena jetting, ziyeneranso kulola malire.Kusiyana pakati pa m'mphepete mwa kudula m'mphepete kufa ndi kakang'ono kwambiri, ndipo kugawa m'lifupi mwa nkhonya kufa pamene yokonza ndi yaing'ono.Izi ziyenera kutsatiridwa.
6. Kuchepa ndi kupunduka.Mapulasitiki ndi osavuta kufota (monga PE).Ziwalo zina zapulasitiki ndizosavuta kupunduka.Ziribe kanthu momwe angapewere, mbali zapulasitiki zimapunduka panthawi yozizira.Pansi pa chikhalidwe ichi, m'pofunika kusintha mawonekedwe a nkhungu kuti agwirizane ndi kupatuka kwa geometric gawo la pulasitiki.Mwachitsanzo: Ngakhale khoma la gawo la pulasitiki limakhala lolunjika, malo ake owonetsera adapatuka ndi 10mm;maziko a nkhungu amatha kukwezedwa kuti asinthe kuchepa kwa mapindikidwe awa.
7. Shrinkage, zinthu zotsatirazi ziyenera kuganiziridwa popanga pulasitiki kupanga nkhungu.
①Chopangidwa chopangidwa chimachepa.Ngati shrinkage ya pulasitiki sichidziwika bwino, iyenera kuyesedwa kapena kupezedwa poyesa ndi nkhungu yofanana.Zindikirani: Kuchepa kokha komwe kungapezeke ndi njirayi, ndipo kukula kwa deformation sikungapezeke.
②Shrinkage chifukwa cha zotsatira zoyipa za media wapakatikati, monga zoumba, mphira silikoni, etc.
③Kuchepa kwa zinthu zomwe zimagwiritsidwa ntchito mu nkhungu, monga kutsika poponya aluminiyamu.
Nthawi yotumiza: Aug-18-2021