Zida Zowonjezera Zofananira
Zida zosiyanasiyana zimagwiritsidwa ntchito popanga extrusion. Apa tikhoza kutenga chitsanzo cha PVC extrusion ndondomeko. Zida zina ndi polyethylene, acetal, nayiloni, acrylic, polypropylene, polystyrene, polycarbonate, ndi acrylonitrile. Izi ndizinthu zoyambirira zomwe zimagwiritsidwa ntchito popanga extrusion. Komabe, ndondomekoyi siimangokhala pazinthu izi.
Chidziwitso choyambirira chapulasitiki extrusion ndondomeko
The pulasitiki extrusion ndondomeko adzayamba ndi kusintha yaiwisi utomoni. Choyamba, ikani mu hopper ya extruder. Pamene utomoni ulibe zowonjezera pazinthu zina, zowonjezera zimawonjezeredwa mu hopper. Pambuyo poyikidwa, utomoni umadyetsedwa kuchokera ku doko la chakudya cha hopper, ndiyeno umalowa mu mbiya ya extruder. Mu mbiya muli chomangira chozungulira. Izi zidzadyetsa utomoni, womwe umayenda mkati mwa mbiya yayitali.
Panthawi imeneyi, utomoni umakhala ndi kutentha kwambiri. Kutentha kwambiri kumatha kusungunula zinthu. Malingana ndi kutentha kwa mbiya ndi mtundu wa thermoplastic, kutentha kumasiyana kuchokera pa 400 mpaka 530 madigiri Fahrenheit. Kuphatikiza apo, ma extruder ambiri amakhala ndi mbiya yomwe imawonjezera kutentha kuchokera pakukwera mpaka kudyetsa mpaka kusungunuka. Njira yonseyi imachepetsa chiopsezo cha kuwonongeka kwa pulasitiki.
Pulasitikiyo inkasungunuka ndikufika kumapeto kwa mbiyayo, komwe imakanikizidwa pa chubu la chakudya ndi fyuluta ndikufa. Panthawi ya extrusion, zowonetsera zidzagwiritsidwa ntchito kuchotsa zonyansa kuchokera ku pulasitiki yosungunuka. Kuchuluka kwa zowonetsera, porosity ya zowonetsera ndi zinthu zina zimayendetsedwa kuti zitsimikizire kusungunuka kofanana. Kuphatikiza apo, kuthamanga kwa msana kumathandizira kusungunuka kofanana.
Zinthu zosungunula zikafika pachubu la chakudya, zimayikidwa mu nkhungu. Potsirizira pake, imazizira ndi kuuma kupanga chomaliza. Pulasitiki yopangidwa mwatsopano imakhala ndi madzi osambira otsekedwa kuti afulumire kuzizira. Komabe, pa pepala extrusion, osamba madzi m`malo ndi ozizira masikono.
Masitepe akuluakulu apulasitiki chitoliro extrusion ndondomeko
Monga tanenera kale, njira yopangira pulasitiki imapanga zinthu zosiyanasiyana kuchokera ku zipangizo zomangira kupita ku mafakitale, zotchinga zamagetsi, mafelemu awindo, edging, weatherstripping ndi mipanda. Komabe, njira yopangira zinthu zonsezi idzakhala yofanana ndi kusiyana kochepa. Pali njira zingapo zolowera chitoliro cha pulasitiki.
Mkusungunuka kwa mlengalenga
Zida zopangira kuphatikiza ma granules, ufa kapena ma granules zimayikidwa mu hopper. Pambuyo pake, zinthuzo zimadyetsedwa m'chipinda chamoto chotchedwa extruder. Zinthuzo zimasungunuka pamene zikudutsa mu extruder. Ma Extruder ali ndi ma bolt awiri kapena amodzi.
Sefa zakuthupi
Zinthu zikasungunuka, kusefera kumayamba. Zinthu zosungunuka zimayenda kuchokera ku hopper kudutsa pa mmero kupita ku zozungulira zozungulira zomwe zikuyenda mkati mwa extruder. Zomangira zozungulira zimagwira ntchito mu mbiya yopingasa momwe zinthu zosungunuka zimasefedwa kuti zigwirizane.
Kuzindikira Makulidwe a Zinthu Zosungunuka
Zomwe zimapangidwa ndi pulasitiki zimasiyana malinga ndi zomwe zimagwiritsidwa ntchito popanga. Komabe, zida zonse zopangira zimatenthedwa. Zidazi zidzawonetsedwa ndi kutentha kwakukulu pa kutentha kwapadera. Kutentha kumasiyana malinga ndi zopangira. Pomaliza ntchitoyi, pulasitiki yosungunuka idzakankhidwa ndi kutsegula kotchedwa nkhungu. Zimapanga zinthu kukhala chinthu chomaliza.
Post processing
Mu sitepe iyi, kudula kufa kwa mbiriyo kudzapangidwa kuti ikhale ndi kayendedwe kosalala kuchokera ku mbiri ya cylindrical ya extruder mpaka mawonekedwe omaliza. Ndikoyenera kutchula kuti kuti mupeze zinthu zodalirika komanso zapamwamba, kusinthasintha kwa kayendedwe ka pulasitiki ndikofunikira kwambiri.
Mkuziziritsa kwamlengalenga
Pulasitiki idzatulutsidwa mu nkhungu ndikudutsa mu lamba kuti izizire. Lamba wamtunduwu amatchedwa lamba wotumizira. Pambuyo pa sitepe iyi, chomalizacho chimakhazikika ndi madzi kapena mpweya. Ndikoyenera kutchula kuti ndondomekoyi idzakhala yofanana ndi jekeseni. Koma kusiyana kwake ndikuti pulasitiki yosungunuka imafinyidwa ndi nkhungu. Koma popanga jekeseni, njirayi imachitika kudzera mu nkhungu.
Nthawi yotumiza: Jul-20-2023
