Gulu la nkhungu za pulasitiki

Malinga ndi njira zosiyanasiyana za pulasitiki kuumba ndi processing, zikhoza kugawidwa m'magulu awa:
· Jekeseni nkhungu
Jekeseni nkhungu imatchedwanso jekeseni nkhungu.Njira yopangira nkhungu iyi imadziwika ndi kuyika pulasitiki yaiwisi mu mbiya yotentha yamakina ojambulira.Pulasitiki imatenthedwa ndikusungunuka, ndipo imayendetsedwa ndi wononga kapena plunger ya makina a jakisoni, imalowa mumtsempha wa nkhungu kudzera mumphuno ndi njira yolowera nkhungu, ndipo pulasitiki imapangidwa mu nkhungu poteteza kutentha, kukonza kupanikizika. , kuziziritsa ndi kulimbitsa.Popeza chipangizo chotenthetsera ndi kukanikiza chimatha kugwira ntchito pang'onopang'ono, kuumba jekeseni sikungangopanga magawo apulasitiki okhala ndi mawonekedwe ovuta, komanso kumakhala ndi magwiridwe antchito apamwamba komanso abwino.Choncho, jekeseni akamaumba amatenga gawo lalikulu mu akamaumba mbali za pulasitiki, ndi jekeseni zisamere nkhungu chifukwa oposa theka akamaumba pulasitiki.Makina ojambulira amagwiritsidwa ntchito kwambiri popanga ma thermoplastics, ndipo pang'onopang'ono akhala akugwiritsidwa ntchito popanga mapulasitiki a thermosetting m'zaka zaposachedwa.

· Compression nkhungu
Compression mold imatchedwanso compression mold kapena rabara mold.The akamaumba ndondomeko ya mtundu uwu nkhungu amakhala ndi kuwonjezera pulasitiki zopangira mwachindunji mu lotseguka nkhungu patsekeke, ndiyeno kutseka nkhungu.Pambuyo pa pulasitiki mumkhalidwe wosungunuka pansi pa kutentha ndi kupanikizika, patsekekeyo imadzazidwa ndi kuthamanga kwina.Panthawiyi, mawonekedwe a mamolekyu a pulasitiki amakumana ndi mankhwala ophatikizirapo, pang'onopang'ono amawumitsa ndi kupanga.Makatani oponderezedwa amagwiritsidwa ntchito kwambiri popanga mapulasitiki a thermosetting, ndipo zigawo zawo zapulasitiki zomwe zimagwiritsidwa ntchito nthawi zambiri zimagwiritsidwa ntchito popanga magetsi komanso zofunikira zatsiku ndi tsiku.
Kusamutsa mode
Kusamutsa nkhungu amatchedwanso jekeseni nkhungu kapena extrusion nkhungu.Njira yopangira nkhungu yamtunduwu imadziwika ndi kuwonjezera zopangira pulasitiki m'chipinda chodyeramo chotenthetsera, ndiyeno kukakamiza zida za pulasitiki m'chipinda chodyeramo ndi gawo lokakamiza.The pulasitiki amasungunula pansi kutentha ndi kuthamanga kwambiri ndi kulowa patsekeke kudzera mu kuthira dongosolo nkhungu, ndiyeno Chemical mtanda yolumikizira anachita zimachitika ndipo pang`onopang`ono solidifies ndi mawonekedwe.Njira yosinthira yosamutsa imagwiritsidwa ntchito kwambiri pamapulasitiki a thermosetting, omwe amatha kupanga magawo apulasitiki okhala ndi mawonekedwe ovuta kwambiri.

· Extrusion kufa
The extrusion kufa amatchedwanso mutu extrusion.nkhungu imeneyi mosalekeza kutulutsa mapulasitiki ndi mawonekedwe ofanana mtanda, monga mipope pulasitiki, ndodo, mapepala, etc. Kutentha ndi pressurizing chipangizo extruder ndi chimodzimodzi ndi makina jekeseni.Pulasitiki yomwe ili m'malo osungunuka imadutsa pamutu wamakina kuti ipange magawo apulasitiki opangidwa mosalekeza, ndipo kupanga kwake ndikokwera kwambiri.
·Kuphatikiza pa mitundu ya nkhungu za pulasitiki zomwe zatchulidwa pamwambapa, palinso zisankho zopangira vacuum, zopaka mpweya, zomangira zowuma, ndi pulasitiki zotulutsa thovu pang'ono.