Imashini ivuza icupa ni imashini ishobora guhanagura ibyarangiye mumacupa hakoreshejwe uburyo bwikoranabuhanga.Kugeza ubu, imashini nyinshi zifata imashini zikoresha uburyo bubiri bwo kuvuza, ni ukuvuga gushyushya - guhuha.
1. Gushyushya
Preform irasakara binyuze mumatara yubushyuhe bwo hejuru kugirango ashyushye kandi woroshye umubiri wa preform.Kugirango ugumane imiterere yumunwa wamacupa, umunwa wibanze ntukeneye gushyuha, kubwibyo hakenewe igikoresho runaka cyo gukonjesha kugirango gikonje.
2. Gukubita ibishushanyo
Iki cyiciro nugushira preform yashushe muburyo bwateguwe, ukayishyiramo umuvuduko mwinshi, hanyuma ugahindura preform mumacupa yifuza.
Inzira yo guhanagura ni inzira ebyiri zo kurambura, aho iminyururu ya PET yaguwe, ikerekanwa kandi igahuzwa mu byerekezo byombi, bityo bikongera imiterere yubukanishi bwurukuta rwamacupa, kunoza imbaraga, imbaraga, ningaruka zingaruka, no kugira a imikorere myiza cyane.Umuyaga mwiza.Nubwo kurambura bifasha kuzamura imbaraga, ntibigomba kuramburwa cyane.Ikigereranyo cyo kurambura-kigomba kugenzurwa neza: icyerekezo cya radiyo ntigomba kurenga 3.5 kugeza 4.2, naho icyerekezo cya axial ntigishobora kurenga 2.8 kugeza 3.1.Ubunini bwurukuta rwa preform ntibugomba kurenga 4.5mm.
Gukubita bikorwa hagati yubushyuhe bwikirahure nubushyuhe bwa kristu, mubisanzwe bigenzurwa hagati ya dogere 90 na 120.Muri uru rwego, PET yerekana imiterere ihanitse cyane, kandi ihinduka icupa ryeruye nyuma yo guhita byihuta, gukonjesha no gushiraho.Muburyo bumwe, ubu bushyuhe bugenwa nigihe cyo gukonjesha mugikorwa cyo gutera inshinge (nka mashini ya Aoki blowing molding), bityo isano iri hagati yo gutera inshinge na sitasiyo igomba guhuzwa neza.
Muburyo bwo kubumba, hariho: kurambura-gukubita-gukubitwa kabiri.Ibikorwa bitatu bifata igihe gito cyane, ariko bigomba guhuzwa neza, cyane cyane intambwe ebyiri zibanza zerekana igabanywa rusange ryibikoresho hamwe nubwiza bwikubita.Niyo mpamvu, birakenewe guhinduka: igihe cyo gutangira cyo kurambura, umuvuduko wo kurambura, igihe cyo gutangira no kurangiza igihe cyo guhuha mbere, guhuha mbere yo guhuha, umuvuduko utemba, nibindi niba bishoboka, ikwirakwizwa ryubushyuhe muri rusange ya preform irashobora kugenzurwa.Ubushyuhe buringaniye bwurukuta rwinyuma.Muburyo bwo guhita byihuta no gukonjesha, guhangayika biterwa no kurukuta rw'icupa.Ku macupa y’ibinyobwa ya karubone, irashobora kurwanya umuvuduko wimbere, nibyiza, ariko kumacupa yuzuye ubushyuhe, birakenewe ko ureba neza ko arekuwe hejuru yubushyuhe bwikirahure.
Igihe cyo kohereza: Kanama-02-2022