Pakutanga yakanangwa kunyanya kuextrusion, sarudzo nyowani dzehuni-plastiki composites dzakagadziridzwa kuvhura magonhi ejekiseni ekuumba maapplication.
Pakuumba maWPCs, iyo pellet yakakodzera inofanirwa kunge ikaita saizi yeBB diki uye yakatenderedzwa kuti iwane chiyero chepamusoro-kusvika-vhoriyamu.
Luke's Toy Factory, Danbury, Conn., yaitsvaga biocomposite zvinhu zvematoyi ayo uye zvitima.Iyo femu yaida chimwe chinhu chine huni hwechisikigo chitarisiko uye inonzwa iyo inogona zvakare kuumbwa jekiseni kugadzira zvikamu zvemotokari.Vaida zvinhu zvaigona kupendwa kuti zvidzivise chinetso chokupeperesa pendi.Vaidawo chinhu chaizoramba chiripo kunyange chikasara panze.Green Dot's Terratek WC inosangana nezvose izvi zvinodiwa.Inosanganisa huni nepurasitiki yakadzokororwa mune diki pellet inonyatsokodzera kuumba jekiseni.
Nepo matanda-epurasitiki macomposites (WPCs) akaputsika pachiitiko muma1990 semidziyo yainyanya kuiswa mumabhodhi ekushongedza uye fenzi, optimization yezvigadzirwa izvi zvekuumba jekiseni kubva ipapo kwakasiyana zvakanyanya kugona kwavo kushandiswa sezvinhu zvinogara uye zvinogara zviripo.Hushamwari hwezvakatipoteredza chinhu chinokwezva cheWPCs.Vanouya nekabhoni yakaderera zvakanyanya kupfuura petroleum-based zvinhu uye inogona kugadzirwa uchishandisa chete yakadzoserwa huni fibers.
Huwandu hwakakura hwesarudzo dzezvinhu zveWPC maumbirwo arikuvhura mikana mitsva yema molder.Yakadzokororwa uye biodegradable epurasitiki feedstocks anogona kuwedzera kusimbaradzika kwezvinhu izvi.Kune kuwedzera kwenhamba yeaesthetic sarudzo, iyo inogona kushandiswa nekusiyanisa mhando dzehuni uye huni hwehuni saizi mumubatanidzwa.Muchidimbu, optimization yekuumbwa kwejekiseni uye rondedzero inokura yesarudzo dziripo kune vanosanganisa zvinoreva kuti maWPC zvinhu zvakasiyana-siyana kupfuura zvaimbofungwa.
CHII CHINOFANIRWA KUTARISIRWA KUBVA KUBATSIRWA Huwandu huri kuramba huchikura hwemacompounders vava kupa maWPC ari mumhando yepellet.Majekiseni molder anofanirwa kunge achi nzwisisa kana zvasvika kune zvinotarisirwa kubva kune komputa munzvimbo mbiri kunyanya: saizi yepellet uye hunyoro hwemukati.
Kusiyana kana uchiburitsa maWPC ekushongedza uye fenzi, saizi yepellet yunifomu yekunyungudika yakakosha mukuumbwa.Sezvo extruders havafanirwe kunetseka nezvekuzadza WPC yavo muforoma, kudiwa kweyunifomu pellet saizi haina kukura.Nekudaro, zvakakosha kuona kuti musanganiswa une zvinodiwa zvemajekiseni emajekiseni mupfungwa, uye haina kunyanya kutarisisa pane ekutanga uye pekutanga kushandiswa kwakanyanya kweWPCs.
Kana ma pellets akakurisa ane katsika kekunyunguduka zvisina kuenzana, kugadzira kumwe kukweshana, uye kunoguma nechigadzirwa chekupedzisira chakaderera.Iyo pellet yakakodzera inofanira kunge yakaenzana nehukuru hweBB diki uye yakatenderedzwa kuti iwane yakanakira pamusoro-kusvika-vhoriyamu reshiyo.Aya zviyero anofambisa kuoma uye anobatsira kuve nechokwadi chekuyerera kwakatsetseka mukati mekuita kwekugadzira.Majekiseni molder anoshanda neWPCs anofanirwa kutarisira chimiro chakafanana uye kufanana kwavanosanganisa neakare epurasitiki pellets.
Kuoma zvakare imhando yakakosha yekutarisira kubva kune musanganiswa weWPC pellets.Hunyoro hunyoro muWPC huchawedzera pamwe chete nehuwandu hwehuni hwekuzadza muhuni.Nepo zvese zviri zviviri extruding uye jekiseni molding zvinoda yakaderera hunyoro hwehuwandu kune zvakanakisa mhedzisiro, inokurudzirwa mwando mwero wakadzikira zvishoma pakuumba jekiseni pane extrusion.Saka zvakare, zvakakosha kuona kuti musanganiswa wafunga majekiseni molder panguva yekugadzira.Pakuumba jekiseni, hunyoro hunofanirwa kunge huri pasi pe1% kuitira mhedzisiro yakakwana.
Kana vatengesi vazvitora ivo pachavo kuendesa chigadzirwa chagara chine mwero unogamuchirika wehunyoro, majekiseni molder vanopedza nguva shoma vachiomesa pellets ivo pachavo, izvo zvinogona kutungamira kukuchengetedza kwakawanda kwenguva nemari.Majekiseni molder anofanirwa kufunga nezvekutenga mapellet eWPC anotumirwa nemugadziri ane hunyoro hwatove pasi pe1%.
FORMULA & TOOLING CONSIDERATIONS Chiyero chehuni kune epurasitiki mune fomula yeWPC ichava nemhedzisiro pamaitiro ayo apo inofamba nenzira yekugadzira.Iko muzana yehuni iripo mumubatanidzwa ichave nemhedzisiro pane melt-flow index (MFI), semuenzaniso.Sezvo mutemo, iyo yakawanda yehuni iyo inowedzerwa kune yakasanganiswa, yakaderera iyo MFI.
Chikamu chehuni chichavawo nechokuita pakusimba uye kuoma kwechigadzirwa.Kazhinji, kana huni huchiwedzerwa, chigadzirwa chacho chinowedzera kuoma.Huni hunogona kuita 70% yehuni-plastic composite, asi kuomarara kunoguma kunouya nekurasikirwa kwechigadzirwa chekupedzisira, kusvika panjodzi yekuve brittle.
Kuwedzera kwehuni kunopfupisa nguva yekutenderera kwemuchina nekuwedzera chimwe chinhu chekugadzikana kwehuni-plastiki inoumbwa sezvainotonhora muforoma.Uku kusimbiswa kwemaitiro kunobvumira kuti plastiki ibviswe patembiricha yepamusoro apo mapurasitiki akajairwa achiri akapfava zvakanyanya kuti abviswe kubva mukuumbwa kwawo.
Kana chigadzirwa chacho chichizogadzirwa uchishandisa maturusi aripo, saizi yegedhi uye chimiro chakajairwa che mold chinofanira kuita munhaurirano yehuni-particle size.Chidiki chidiki chingangoshanda zvirinani zvishandiso zvine masuwo madiki uye akamanikana ekuwedzera.Kana zvimwe zvinhu zvakatotungamira vagadziri kuti vagadzikane pane yakakura huni particle size, saka zvingave zvinobatsira kugadzirisa zvakare chiripo tooling zvinoenderana.Asi, nekupa sarudzo dziripo dzemhando dzakasiyana siyana, mhedzisiro iyi inofanirwa kudzivirirwa zvachose.
KUGADZIRA WPCs Kugadziridza zvakatemwa zvakare kune tsika yekuchinjika zvakanyanya zvichienderana nekupedzisira kuumbwa kweWPC pellets.Nepo kwakawanda kwekugadzirisa kunoramba kwakafanana neaya echinyakare mapurasitiki, chaiwo huni-kune-purasitiki ratios uye zvimwe zvekuwedzera zvinorehwa kuwana kumwe kutaridzika kunodiwa, kunzwa, kana hunhu hwekuita hungada kuverengerwa mukugadziriswa.
MaWPC anowiriranawo neanoita furo, semuenzaniso.Kuwedzera kweaya anopupa maajenti anogona kugadzira balsa-senge zvinhu.Ichi chinhu chinobatsira kana chigadzirwa chakapedzwa chichida kunyanya kureruka kana kuti buoyant.Nekuda kweiyo jekiseni moulder, zvakadaro, uyu mumwezve muenzaniso wekuti kusiyanisa kuumbwa kwehuni-plastiki kompositi kunogona kutungamira kuti pave nezvakawanda zvekufunga kupfuura apo zvinhu izvi zvakatanga kuuya kumusika.
Kugadzirisa tembiricha inzvimbo imwe iyo maWPC anosiyana zvakanyanya kubva kumapurasitiki akajairwa.MaWPC anowanzo gadzira patembiricha yakatenderedza 50° F yakaderera pane imwechete isina kuzadzwa zvinhu.Zvizhinji zvehuni zvinowedzera zvichatanga kupisa kusvika ku400 F.
Kuveura ndechimwe chezvinhu zvinowanzoitika kana uchigadzira maWPC.Kana uchisunda zvinhu zvinopisa zvakanyanya kuburikidza negedhi diki, kukweshera kwakawedzera kune tsika yekupisa huni uye kunotungamira kune telltale streaking uye inogona kusvibisa purasitiki.Dambudziko iri rinogona kudzivirirwa nekumhanyisa maWPC pane tembiricha yakaderera, kuve nechokwadi kuti saizi yegedhi yakakwana, uye kubvisa chero kutendeuka kusingakoshi kana kona dzekurudyi munzira yekugadzirisa.
Zvine mwero tembiricha yekudzikira zvinoreva kuti vagadziri havawanzoda kuwana tembiricha yakakwira kupfuura yechinyakare polypropylene.Izvi zvinoderedza basa rakaoma rekutora kupisa kunze kwekugadzira.Iko hakuna chikonzero chekuwedzerwa kwemichina yekutonhodza michina, mold dzakagadzirirwa kudzikisa kupisa, kana mamwe matanho anoshamisa.Izvi zvinoreva kuti yakawedzera kudzikiswa nguva dzekutenderera kwevagadziri, pamusoro penguva dzakatokurumidza kutenderera nekuda kwekuvapo kwema organic fillers.
KWETE CHETE CHEKUDHARA WPCs hazvisi zvekushongedza zvakare.Ivo vari kugadziridzwa mukuumbwa kwejekiseni, izvo zviri kuvavhurira kune huwandu hwakawanda hwezvishandiso zvitsva zvechigadzirwa, kubva kune lawn fenicha kusvika kumatoyi emhuka.Hwakasiyana-siyana hwekuumbwa ikozvino huripo hunogona kusimudzira mabhenefiti ezvishandiso izvi maererano nekusimbaradzika, kunaka kwakasiyana, uye maficha akadai sebuoyancy kana kuomarara.Kudiwa kwezvinhu izvi kunongowedzera sezvo mabhenefiti aya ave kunyatsozivikanwa.
Kune majekiseni molder, izvi zvinoreva kuti nhamba yemhando dzakasiyana-siyana kune imwe neimwe yekugadzira inofanira kuverengerwa.Asi zvakare zvinoreva kuti ma molder anofanirwa kutarisira chigadzirwa chinokodzera kuumbwa kwejekiseni pane feedstock yakasarudzwa kuti iburitswe mumabhodhi.Sezvo zvinhu izvi zvichiramba zvichikura, majekiseni emajekiseni anofanirwa kusimudza mazinga ehunhu hwavanotarisira kuona mune zvakaumbwa zvinhu zvinounzwa nevanovatengesa.
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Nguva yekutumira: Sep-07-2019