01 Mfundo zamakina
Makina oyambira otulutsa ndi osavuta - koti amatembenuza mu silinda ndikukankhira pulasitiki patsogolo.Zomangirazo kwenikweni ndi bevel kapena rampu yomwe imazunguliridwa mozungulira chapakati.Cholinga chake ndikuwonjezera kukakamiza kuti mugonjetse kukana kwakukulu.Pankhani ya extruder, pali 3 mitundu kukana kugonjetsa: kukangana kwa particles olimba (chakudya) pa yamphamvu khoma ndi mikangano pakati pawo pamene wononga akutembenukira mokhota angapo (chakudya zone);kumamatira kwa kusungunuka kwa khoma la silinda;Kukaniza kwa kusungunula kuzinthu zake zamkati pamene akukankhira patsogolo.
Zomangira zing'onozing'ono zambiri zimakhala ndi ulusi wakumanja, monga zomwe zimagwiritsidwa ntchito popanga matabwa ndi makina.Ngati aziwayang'ana kumbuyo, akutembenukira kwina chifukwa amayesetsa kupota mbiya m'mbuyo.Mu ma screw extruder ena amapasa awiri, zomangira ziwiri zimazungulira moyang'anizana ndi ma silinda awiri ndikuwoloka wina ndi mzake, kotero imodzi iyenera kukhala yoyang'ana kumanja ndipo inayo iyenera kumanzere.Mu zitsulo zina zamapasa awiri, zomangira ziwirizo zimazungulira mbali imodzi ndipo ziyenera kukhala zofanana.Komabe, mulimonse momwe zingakhalire, pali zokhomera zomwe zimatengera mphamvu yakumbuyo, ndipo mfundo ya Newton ikugwirabe ntchito.
02 Thermal mfundo
Mapulasitiki owonjezera ndi thermoplastics-amasungunuka akatenthedwa ndikukhazikikanso akakhazikika.Kodi kutentha kwa pulasitiki yosungunuka kumachokera kuti?Kutentha koyambira ndi ma cylinder/die heaters atha kugwira ntchito ndipo ndikofunikira poyambira, koma mphamvu yamagetsi yamagetsi - kutentha kwapang'onopang'ono komwe kumapangidwa mu silinda pamene mota itembenuza wononga kuti isakanize kusungunuka kwa viscous - ndiye gwero lofunika kwambiri la kutentha. kwa mapulasitiki onse, kupatula makina ang'onoang'ono, zomangira zothamanga kwambiri, mapulasitiki osungunuka otentha kwambiri, ndi zokutira zotulutsa.
Pazochita zina zonse, ndikofunikira kuzindikira kuti chotenthetsera katiriji sichofunikira kwenikweni chomwe chimagwira ntchito ndipo chifukwa chake chimakhala ndi zotsatira zochepa pakutulutsa kuposa momwe tingayembekezere.Kutentha kwa silinda kumbuyo kungakhale kofunikira chifukwa kumakhudza kuchuluka kwa zolimba zomwe zimatumizidwa mu meshing kapena chakudya.Kutentha kwakufa ndi nkhungu nthawi zambiri kumayenera kukhala kutentha komwe kumasungunuka kapena kuyandikira, pokhapokha atagwiritsidwa ntchito pazinthu zina monga varnishing, kugawa madzimadzi, kapena kuwongolera kuthamanga.
03 Mfundo yochepetsera
Mu extruders ambiri, kusintha kwa wononga liwiro zimatheka ndi kusintha galimoto liwiro.Galimotoyo nthawi zambiri imatembenuka ndi liwiro la pafupifupi 1750rpm, koma ndiyothamanga kwambiri pa screw imodzi ya extruder.Ngati imazunguliridwa pa liwiro lothamanga kwambiri, kutentha kwakukulu kumapangidwa, ndipo nthawi yokhalamo ya pulasitiki ndi yochepa kwambiri kuti ikonzekere kusungunula yunifolomu, yosungunuka bwino.Zoyezetsa zocheperako zili pakati pa 10:1 ndi 20:1.Gawo loyamba likhoza kukhala lokonzekera kapena pulley, koma gawo lachiwiri limakhala lokonzekera ndipo screw imayikidwa pakatikati pa giya yayikulu yomaliza.
M'makina ena oyenda pang'onopang'ono (monga zomangira zamapasa a UPVC), pakhoza kukhala magawo atatu otsika ndipo liwiro lalikulu lingakhale lotsika mpaka 30 rpm kapena kuchepera (chiwerengero mpaka 60: 1).Kumbali ina, zomangira zazitali zamapasa zokondoweza zimatha kuthamanga pa 600rpm kapena mwachangu, kotero kutsika kotsika kumafunika komanso kuzizirira kozama kwambiri.
Nthawi zina kuchuluka kwa kuthamanga sikufanana ndi ntchitoyo-mphamvu zambiri zimasiyidwa zosagwiritsidwa ntchito-ndipo ndizotheka kuwonjezera pulley pakati pa mota ndi gawo loyamba lotsitsa lomwe limasintha liwiro lalikulu.Izi mwina zimawonjezera liwiro la screw kupitilira malire am'mbuyomu kapena kuchepetsa liwiro lalikulu, kulola kuti dongosolo lizigwira ntchito pamlingo wokulirapo wa liwiro lalikulu.Izi zimawonjezera mphamvu zomwe zilipo, zimachepetsa amperage ndikupewa zovuta zamagalimoto.Muzochitika zonsezi, kutulutsa kumatha kuchulukira kutengera zakuthupi ndi zosowa zake zoziziritsa.
Atolankhani:
Qing Hu
Malingaliro a kampani Langbo Machinery Co.,Ltd
No.99 Lefeng Road
215624 Leyu Town Zhangjiagang Jiangsu
Telefoni: +86 58578311
EMail: info@langbochina.com
Webusayiti: www.langbochina.com
Nthawi yotumiza: Jan-17-2023