Chiyambi cha ndondomeko

3/4 ya mankhwala owumbidwa ndi nkhonya amapangidwa ndi kuumba kwa extrusion.The extrusion ndondomeko ndi kukakamiza zinthu kudzera dzenje kapena kufa kupanga mankhwala.

The extrusion kuwomba akamaumba ndondomeko tichipeza 5 masitepe: 1. Pulasitiki preform (extrusion wa dzenje pulasitiki chubu).2. Tsekani nkhungu yophimba pa parison, ikani nkhungu ndikudula tchalitchi.3. Kuwomba nkhungu ku khoma lozizira la patsekeke, sinthani kutsegula ndikusunga kupanikizika kwina panthawi yozizira.4. Tsegulani nkhungu ndikuchotsa mbali zowombedwa.5. Chepetsani kung'anima kuti mupeze chomaliza.

Extrusion dzenje kuwomba akamaumba ndondomeko
Extrusion dzenje nkhonya akamaumba ndi kusungunula ndi plasticize pulasitiki mu extruder, ndiyeno extrude tubular parison kudzera tubular kufa.Pamene parison kufika utali wina, parison ndi usavutike mtima mu nkhungu kuwomba.Mpweya woponderezedwa umawomberedwa mkati kuti parisonyo ikhale pafupi ndi khoma la nkhungu kuti ipeze mawonekedwe a patsekeke, ndipo pansi pa chikhalidwe chokhala ndi kupanikizika kwina, pambuyo pozizira ndi kuumba, chinthu chowombedwacho chimapezeka mwa kugwetsa.Njira extrusion kuwomba akamaumba motere.
Pulasitiki → plasticizing ndi extrusion → tubular parison → kutseka nkhungu → kukwera kwa inflation → kuzizira → kutsegula nkhungu → chotsani malonda
Extrusion kuwomba akamaumba akhoza zambiri kugawidwa mu njira zisanu zotsatirazi, monga momwe chithunzi 1-1.
① Polima imasungunuka kudzera mu chotulukapo, ndipo kusungunuka kwake kumapangidwa kukhala parison ya tubular kudzera mukufa.
②Parishiyo ikafika kutalika kodziwikiratu, nkhungu yowombayo imatsekedwa, tchalitchicho chimamangidwa pakati pa magawo awiri a nkhungu, ndipo tchalitchicho chimadulidwa ndikusunthira kumalo ena.
③Bayikirani mpweya woponderezedwa mu parison kuti mufufuze parisonyo kuti ikhale pafupi ndi nkhungu kuti ipangike.
④ Khalani pansi.
⑤Tsegulani nkhungu ndikutulutsa chopangidwacho.