Plastic extrusion yechubhu, hose uye pombi inzira yakatsiga-yemamiriro ekushandura thermoplastic raw material kuita yakapedzwa kana pedyo-yakapedzwa annular chigadzirwa.Iyo mbishi inowanzoitika muchimiro chepurasitiki pellets kana hupfu.Iko kutendeuka kunoitika nekugadzira homogeneous yakanyungudutswa misa mu extruder uye kuimanikidza pasi pekumanikidzwa kuburikidza ne extrusion die orifice inotsanangura chimiro chechikamu chechigadzirwa.Iyo yakaumbwa zvinhu, kana extrudate, inotonhodzwa uye inokweverwa kure nekubuda kwekufa pamwero unodzorwa.Iyo extrudate inogona kubva yakuvadzwa pane spool, kucheka kune yakatarwa kureba, kana kunanga kune imwe in-line maitiro.
Kusiyana nekuumbwa kwejekiseni kana kuvhuvhuta, ayo ari cyclic maitiro, extrusion inzira yakatsiga-mamiriro.Izvi zvakatsiga-zvimiro hunhu zvinoburitsa mamwe mabhenefiti akasiyana uye matambudziko senzira yekugadzira.Zvigadzirwa zvakawedzeredzwa zvakareba uye zvinoenderera, uye zvine chikamu chemuchinjikwa chinowanzogara maererano neaxis kana gwara rekugadzira.Jekiseni-yakaumbwa zvigadzirwa zvinhu zvakasarudzika zvine akasiyana-siyana zvikamu muakisi imwe neimwe.Ichokwadi chokuti extrusion yechubhu, hose uye pombi inzira yakadzikama ichakurukurwa munzvimbo dzakawanda dzechinyorwa ichi.Izwi rinoshandiswa pakutsanangura chubhu, hose uye pombi inosiyana kubva kune indasitiri kuenda kune indasitiri.
Equipment
Izvo zvikamu zvikuru zvechubhu, hose, kana pombi extrusion system inowanzo kupatsanurwa kuita zvikamu zviri kumusoro kweiyo extruder, iyo extruder pachayo, uye iyo iri pasi pemvura yeextruder.Zvikamu zvekumusoro zvinosanganisira resin inobata midziyo yekuendesa iyo mbishi kune extruder, uye resin conditioning midziyo inofanopisa resin, kana kudzora hunyoro hweresin isati yapinda muextruder feed huro.Izvo zvikamu zvekudzika pasi zvinosanganisira yakanyungudutswa resin sefa kana skrini inoshandura, iyo extrusion die assembly, yekudzima kana vacuum sizing tank, chero chigadzirwa chekuyera zviridzwa, extrusion mutsara wekumhanyisa controller nenzira yebhandi rekudhonza kana nip roll set, uye pakupedzisira chigadzirwa. kucheka-kubvisa mudziyo kana mhepo inomonereka.Kune dzimwe nzira dzekuwedzera extrusion iyo inotora iyo extruded chigadzirwa zvakananga mune imwe in-line maitiro ekuwedzera kwekusimbisa braiding kana yekuwedzera mamwe machira kana resin layer.
Zvishandiso
Extrusion matekiniki anogona kushandiswa kugadzirisa akawanda thermoplastics uye mamwe thermoset mapurasitiki.Maresin anowanzo kubudiswa kune chubhu, hose uye pombi zvigadzirwa zvinosanganisira yakakwirira uye yakaderera density polyethylene, polypropylene, polyurethane, polystyrene, fluoropolymers, PTFE, polyester, uye inochinjika uye yakasimba PVC.Chimiro chinowanzo siyanisa maresin akawedzera kubva kune jekiseni-akaumbwa resins ndiko kunyunguduka viscosity yepurasitiki pakudziya kwakajairika.Extruded mapurasitiki kazhinji ane yakakwirira kunyunguduka viscosity, iyo inobvumira extrudate kuchengeta chimiro chinopiwa kwairi nefa apo extrudate iri quenching stages.Combinations akasiyana-siyana resins anogona kushandiswa kuwana inokosha muviri, zvipenyu, kana kemikari zvinhu.Mazhinji ekuwedzera anogona kushandiswa panguva yeextrusion process kuti awedzere kugadzirisa maitiro epolymer kana kushandura zvigadzirwa.Izvi zvinowedzera zvinosanganisira mafuta, thermal stabilizers, antioxidants, radiopacifying agents, uye colorants.
Processing Parameters
Iwo ma paramita akakosha kune extrusion processing akafanana neaya ejekiseni molding maitiro.Resin tembiricha, resin pressure, resin hunyoro hwemukati, screw speed, uye screw motor amperage zvinowanzodzorwa kana kutariswa kuti ipe homogeneous kunyungudika pamwero wakadzorwa volumetric.Kudzima tembiricha uye chiyero icho iyo extrudate inodhirowa inodzorwa kana kutariswa kuti ipe inodzorwa chigadzirwa saizi.Kuyera kuyerwa, uchishandisa nzira dzakasiyana dzekuyera, inogona kutorwa yeextrudate sezvainogadzirwa.Kusiyana nekuumbwa kwejekiseni, extrusion inogona kusiyanisa saizi yechigadzirwa chekupedzisira pasina kushandura dhizaini yekufa.Yakajairwa extrusion kugadzirwa kushivirira kana process kuenderana inobatwa kusvika mukati me1% yezita rakayerwa kukosha.Sezvo aya maitiro ekugadzira anosanganisira akadzikama mamiriro ezvinhu, chero chiito chinogona kudzikamisa chero parameter kana mamiriro anobatsira kune maitiro.
Nguva yekutumira: May-09-2017