Ndi njira zotani zopangira zida zopangira hollow blowing?

Mfundo yopangira zida zomangira zibowo ndi njira yake yopangira Zomwe zimatchedwa makina opangira nkhonya amatchedwanso makina omangira.Pulasitiki amasungunuka ndi quantitatively extruder mu wononga extruder, ndiyeno anapanga kudzera pakamwa filimu, ndiyeno utakhazikika ndi mphete mpweya, ndiyeno kuwomberedwa mu nkhungu.Njira yopangira mapulasitiki omwe akukula mwachangu.The tubular pulasitiki parison wopezedwa extrusion kapena jekeseni akamaumba thermoplastic utomoni amaikidwa mu nkhungu kugawanika pamene ndi kutentha (kapena kutenthedwa ndi boma anafewetsa), ndi wopanikizika mpweya amalowetsedwa mu ndende atangotseka nkhungu kuwomba pulasitiki parison. .Imakulitsa ndikumamatira pafupi ndi khoma lamkati la nkhungu, ndipo pambuyo pozizira ndi kugwetsa, zinthu zosiyanasiyana zopanda kanthu zimapezeka.

Makina owumba nkhonya / njira idayamba kugwiritsidwa ntchito popanga mbale zocheperako za polyethylene panthawi yankhondo yachiwiri yapadziko lonse.Chakumapeto kwa zaka za m'ma 1950, ndi kubadwa kwa polyethylene yochuluka kwambiri komanso kukula kwa makina opangira nkhonya, teknoloji ya makina opangira nkhonya idagwiritsidwa ntchito kwambiri.Kuchuluka kwa makontena obowola kumatha kufika malita masauzande ambiri, ndipo zopanga zina zimayendetsedwa ndi makompyuta.Pulasitiki yoyenera kuumba nkhonya imaphatikizapo polyethylene, polyvinyl chloride, polypropylene, polyester, ndi zina zotero, ndipo zotengera zopanda kanthu zimagwiritsidwa ntchito kwambiri ngati zotengera zamakampani.

Chidziwitso cha njira yopangira ma hollow blowing:

Chifukwa cha kusiyana kwa zipangizo, zofunika processing, linanena bungwe ndi mtengo, osiyana nkhonya akamaumba njira ndi ubwino zosiyanasiyana pokonza zinthu zosiyanasiyana.

Kuwombera kwazinthu zopanda kanthu kumaphatikizapo njira zitatu zazikulu:

1. Extrusion kuwomba akamaumba: makamaka ntchito unsupported parison processing;

2. jekeseni kuwomba akamaumba: makamaka ntchito parison processing mothandizidwa ndi zitsulo pachimake;

3. Kuwomba kowomba: kuphatikiza kuumba kwa extrusion-stretch-blow, jekeseni-kutambasula-kuwomba kuumba njira ziwiri, kungathe kukonza zinthu zomwe zimagwiritsidwa ntchito ndi biaxially, kuchepetsa kwambiri ndalama zopangira ndi kupititsa patsogolo ntchito ya mankhwala.

Komanso, pali Mipikisano wosanjikiza kuwomba akamaumba, psinjika kuwomba akamaumba, kuviika ❖ kuyanika nkhonya akamaumba, thovu kuwomba akamaumba, azithunzi-thunzi atatu kuwomba akamaumba, etc. Koma 75% ya mankhwala nkhonya akamaumba ndi extrusion kuwomba akamaumba, 24% ndi jekeseni kuwombera akamaumba. , ndi 1% ndi zina zowomba;Pakati pa zinthu zonse zowomba, 75% ndi yazinthu zomwe zimapangidwa ndi biaxially.Ubwino wa kuumba kwa extrusion ndikuchita bwino kwambiri, kutsika mtengo kwa zida, kusankha mitundu yosiyanasiyana ya nkhungu ndi makina, komanso kuipa kwake ndi kuchuluka kwa zinyalala, kusabweza bwino komanso kugwiritsa ntchito zinyalala, kuwongolera makulidwe azinthu, komanso kupezeka kwa zinthu.Pambuyo pake, m'pofunika kuchita ntchito yokonza.Ubwino wa jekeseni kuwomba akamaumba ndi kuti palibe zinyalala ndondomeko processing, ndi makulidwe khoma la mankhwala ndi kubalalitsidwa kwa zinthu akhoza bwino ankalamulira.Choyipa chake ndikuti zida zomangira ndizokwera mtengo ndipo pamlingo wina zimangoyenera kupangidwa ndi zida zazing'ono.

Njira zikhalidwe za dzenje kuwomba akamaumba amafuna kuti wothinikizidwa mpweya inflating parison mu nkhungu ayenera kukhala woyera.Kuthamanga kwa mpweya pakupanga jekeseni ndi 0,55 mpaka 1 MPa;Kuthamanga kwa kuwombera kwa extrusion ndi 0.2l mpaka 0.62 MPa, ndipo kupanikizika kwa kuwombera kowomba kumafunika nthawi zambiri kukhala 4 MPa.Pakukhazikika kwa mapulasitiki, kupanikizika kochepa kumapangitsa kuti kupanikizika kwamkati kwa mankhwala kukhale kochepa, kufalikira kwa nkhawa kumakhala kofanana kwambiri, ndipo kupanikizika kochepa kungapangitse mphamvu, mphamvu, kupindika ndi zina za mankhwala.