Blow molding, inozivikanwawo sehollow blow molding, inokurumidza kugadzira epurasitiki kugadzirisa.Kuumba-kuvhuvhuta Mukati meHondo Yenyika II, mavhiri akaumbwa nemhepo akatanga kushandiswa kugadzira mabhodhoro epolyethylene akaderera.Mukupera kwema1950, nekuzvarwa kwe-high-density polyethylene uye kugadzirwa kwemichina yekugadzira bhobho, tekinoroji yekuumba kuKunshan yakashandiswa zvakanyanya.Huwandu hwemidziyo isina humbowo hunogona kusvika zviuru zvemarita, uye kumwe kugadzira kwatora kutonga kwekombuta.Mapurasitiki akakodzera kuumbwa nekuputira anosanganisira polyethylene, polyvinyl chloride, polypropylene, polyester, nezvimwewo, uye midziyo yakawanikwa isina maburi inoshandiswa zvakanyanya semidziyo yekurongedza maindasitiri.
Zvinoenderana neiyo parison yekugadzira nzira, blowing molding inogona kupatsanurwa kuita extrusion blow molding uye jekiseni kuvhuvhuta.Iwo achangobva kugadzirwa anosanganisira akawanda-layer blow molding uye stretch blow molding.Iyo tubular yepurasitiki parison inowanikwa neextrusion kana jekiseni kuumbwa kwe thermoplastic resin inoiswa muchikamu chakatsemurwa ichipisa (kana kupisa kusvika pakunyorovesa mamiriro), uye mweya wakatsikirirwa unopinzwa mupuriso nekukurumidza mushure mekuvharwa kwe mold kuti ivhuvhute parison yepurasitiki. .Iyo inowedzera uye inonamatira zvakanyanya kumadziro emukati me mold, uye mushure mekutonhora uye kudhirowa, akasiyana maburi zvigadzirwa zvinowanikwa.Iyo nzira yekugadzira yefirimu yakaputirwa yakafanana zvakanyanya mumusimboti kuvhuvhuta kuumbwa kwezvigadzirwa zvisina nhanho, asi haishandise mold.Kubva pamaonero epurasitiki yekugadzirisa tekinoroji kurongedza, iyo yekuumba maitiro eyakaputirwa firimu inowanzobatanidzwa mune extrusion.Iyo blow molding process yakatanga kushandiswa kugadzira yakaderera-density polyethylene vials munguva yeHondo Yenyika II.Mukupera kwema1950, nekuzvarwa kwe-high-density polyethylene uye kugadzirwa kwemichina yekuputira inoputika, tekinoroji yekuumba yakashandiswa zvakanyanya.Huwandu hwemidziyo isina humbowo hunogona kusvika zviuru zvemarita, uye kumwe kugadzira kwatora kutonga kwekombuta.Mapurasitiki akakodzera kuumbwa nekuputira anosanganisira polyethylene, polyvinyl chloride, polypropylene, polyester, nezvimwewo, uye midziyo yakawanikwa isina maburi inoshandiswa zvakanyanya semidziyo yekurongedza maindasitiri.
Nguva yekutumira: Jun-20-2023