Pali njira zambiri m'magulu a nkhungu zamagalimoto pulasitiki, malinga ndi njira zosiyanasiyana zazigawo zapulasitikikupanga ndi kukonza, iwo akhoza kugawidwa m'magulu otsatirawa.
1 - jakisoni nkhungu
Njira yopangira jekeseni nkhungu imadziwika ndi kuyika zinthu zapulasitiki mumgolo wotentha wa makina ojambulira. Pulasitiki imatenthedwa ndikusungunuka, imakankhidwa ndi screw kapena plunger ya makina ojambulira, ndikulowa m'bowo la nkhungu kudzera pamphuno ndi njira yothira nkhungu, ndipo pulasitiki imachiritsidwa mu nkhungu poteteza kutentha, kusunga kupanikizika, ndi kuzizira. Popeza chipangizo chotenthetsera ndi kukakamiza chimatha kugwira ntchito pang'onopang'ono,jekeseni akamaumbasangangopanga magawo apulasitiki ovuta, komanso kukhala ndi magwiridwe antchito apamwamba komanso abwino. Chifukwa chake, kuumba jekeseni kumatenga gawo lalikulu pamapangidwe apulasitiki, ndipo nkhungu za jakisoni zimapitilira theka la nkhungu zomangira pulasitiki. Makina opangira jakisoni amagwiritsidwa ntchito kwambiri popanga ma thermoplastics, koma m'zaka zaposachedwa amagwiritsidwanso ntchito popanga mapulasitiki a thermosetting.
2-Compression nkhungu
Kupaka mphira kumatchedwanso mphira nkhungu. The akamaumba ndondomeko nkhungu amakhala ndi kuwonjezera pulasitiki zopangira mwachindunji lotseguka nkhungu patsekeke, ndiye kutseka nkhungu, pambuyo pulasitiki kusungunuka ndi zochita za kutentha ndi kupanikizika, amadzaza patsekeke ndi mavuto ena. Panthawiyi, mawonekedwe a mamolekyu a pulasitiki amapanga mankhwala osakanikirana, ndipo pang'onopang'ono amaumitsa ndikuyika mawonekedwewo. Kupopera nkhungu kumagwiritsidwa ntchito kwambiri popanga mapulasitiki a thermosetting, ndipo mbali zake zapulasitiki zomwe zimagwiritsidwa ntchito nthawi zambiri zimagwiritsidwa ntchito ngati chipolopolo cha ma switch amagetsi ndi zofunikira zatsiku ndi tsiku.
3-Kusamutsa nkhungu
Kusamutsa nkhungu kumatchedwanso extrusion nkhungu. Njira yopangira nkhungu iyi imadziwika ndikuwonjezera zida zapulasitiki m'chipinda chodzaza moto, ndiyeno kukakamiza zida zapulasitiki m'chipinda chodzaza ndi gawo lokakamiza, pulasitiki imasungunuka ndi kutentha kwambiri komanso kupanikizika ndikulowa m'mitsempha kudzera pakutsanulira. dongosolo la nkhungu, ndiyeno mankhwala kuwoloka kugwirizana kumachitika ndipo pang`onopang`ono kuchiritsa. Njira yosamutsa imagwiritsidwa ntchito kwambiri popanga mapulasitiki a thermosetting ndipo imatha kuumba zigawo zapulasitiki zokhala ndi mawonekedwe ovuta.
4 - Extrusion Die
Extrusion kufa amatchedwanso extrusion mutu. Imfa iyi imatha kutulutsa mapulasitiki omwe ali ndi mawonekedwe ofanana, monga mapaipi apulasitiki, ndodo, mapepala, etc. The extruder imatenthedwa ndikukakamizidwa ndi chipangizo chomwecho monga makina a jekeseni. Pulasitiki mumkhalidwe wosungunuka umadutsa pamutu kuti upangitse kutuluka kosalekeza kwa magawo apulasitiki opangidwa, ndipo kupanga bwino kumakhala kwakukulu kwambiri.
Kuphatikiza pa mitundu yomwe yatchulidwa pamwambapa ya nkhungu za pulasitiki, palinso zisankho zovunda, zomangira mpweya wothinikizidwa, zowumba zowumba, zoumba pulasitiki zotsika, ndi zina zambiri.
Nthawi yotumiza: Sep-07-2022
