Pfungwa yekuumbwa uye kuumbwa yakakurumbira mumaindasitiri epurasitiki.Plastiki ine akanakira maficha senge yakakwira malleability, yakachipa mumutengo, yakanyanya kugadzikana.Saka iri kushandiswa zvakanyanya mukuumba.Chaizvoizvo Plastiki jekiseni kuumba ndiyo nzira huru yekugadzira zvikamu zvepurasitiki.Kuuya kune iyo pfungwa yekuumbwa, inzira yekugadzira iyo inoyerera kana inobatika zvinhu zvitsva zvinowana chimiro chakaomarara chinonzi mold.Mumashoko akareruka, kuumbwa kwepurasitiki inzira iyo plastiki inoumbwa kuita chimiro chaunoda.
Jekiseni molding ine mupiro mukuru mukugadzira zvinhu zvakawanda zvemumba nemaindasitiri.Inoshandiswa kugadzira akawanda marudzi emidziyo yakaita semagetsi edzimba, midziyo, mabhodhoro mavharo, mota dzemukati, mizinga, uye zvimwe zvakawanda zvepurasitiki zvigadzirwa zviripo nhasi.Iwo maficha akadai seyakanyanya kushivirira kurongeka, kudzokorora, kusarudzwa kwezvinhu hombe, mutengo wakaderera wevashandi, kurasikirwa kushoma kwezvikara, uye kushoma kupedzisa zvikamu mushure mekuumbwa ndiko kwakanakira kuumbwa kwejekiseni.
Iyo yepurasitiki jekiseni mold inowanzoda zvinotevera mukuita kwepurasitiki jekiseni kuumba-
1. muchina wekuumba jekiseni2.zvinhu zvepurasitiki mbishi3.Mold.
Pakugadzira majekiseni epurasitiki, kune akasiyana marudzi ezvigadzirwa zvakaita se thermosetting plastic, elastomers uye thermoplastic polymers (resin) nezvimwe zvinoshandiswa kugadzira majekiseni epurasitiki sezvo zvinhu izvi zvine viscosity yakakura.Michina yemajekiseni epurasitiki ine zvikamu zvakakosha senge zvinhu hopper, kudziyisa unit, plunger etc. Purasitiki inonyungudutswa mumushini wekuumba jekiseni yobva yabayiwa muforoma, umo inotonhorera uye inoomesa muchikamu chekupedzisira.
Nguva yekutumira: Dec-10-2017