Endlelo ro lulamisa switirhisiwa swa plastiki ngopfu ngopfu i ku n’okisiwa, ku khuluka na ku titimela ka swiphemuphemu swa rhaba kuva switirhisiwa leswi hetiweke. I endlelo ro kufumeta ivi endzhaku ri titimela. Nakambe i endlelo ro cinca pulasitiki kusuka eka swiphemuphemu kuya eka swivumbeko swohambana hambana. Ku lulamisiwa ku ta hlamuseriwa ku suka eka mavonelo ya maendlelo ya switeji swo hambana.
1.Ku n’oka
Xihisi xa xitirhisiwa lexi xipfumelela swiphemuphemu swa raw material kuva swi n’oka hakatsongotsongo kuva swiva fluid flow, leswi ngopfu ngopfu swifaneleke eka ku lulamisiwa ka mahiselo ya switirhisiwa swohambana hambana. Ku engetela mahiselo swita tala ku hatlisisa ku khuluka ka switirhisiwa swoka swinga tirhisiwanga, leswinga engetelaka ku tirha kahle kambe swinga endleka swinga tiyisisi mbuyelo. Swi fanele ku va Balance leyi faneleke. Ku engetela kwalano, mbuyelo wa kahle xikan’we na swihlawulekisi swa high thermal cracking ya PP hileswaku swikahle ku endla leswaku switirhisiwa leswinga lulamisiwangiki swi khulukela kahle kuya eka die hinkarhi wa vuhumelerisi ku papalata ku tatiwa lokunga enelangiki kumbe ku tlhelela endzhaku. Backflow swivula leswaku ku khuluka ka switirhisiwa swoka swinga lulamisiwanga swi hatlisa kutlula mpimo wa vuhumelerisi. Ku tlakuka ka vukorhokeri bya ku khuluka ka xikarhi swi ringana na ku tlakuka ka MFR, leyi nga yin’wana ya tindlela leti nga kona ta ku lulamisa, kambe swi tlhela swi vanga ku hangalasiwa ka MFR loku nga tolovelekangiki, leswi nga tisaka ku tlakuka ka ku nga tshamiseki, leswi nga engetelaka mpimo wa swihoxo. Hambiswiritano, switirhisiwa leswi hetiweke hi PP ahi switirhisiwa leswingana high dimensional precision hikokwalaho ka ku tirhisiwa, hikokwalaho nkucetelo ahi wukulu.
2. Xikurufu
Vunyingi bya PP processing yi fambisiwa hi screw kuva yi fambisa fluidity, hikokwalaho dizayini ya screw yina nkucetelo lowukulu. Vukulu bya diameter byi khumba vuhumelerisi, naswona compression ratio yi khumba nhlayo ya ntshikelelo na vuhumelerisi na mbuyelo wa xitirhisiwa lexi hetiweke. Leswi swi tlhela swi katsa switirhisiwa swo hambana-hambana. (Ti masterbatches ta mihlovo, swiengeteri na swihundzuluxi) mbuyelo wo hlanganisa. Ku khuluka ka raw material ngopfu ngopfu swiya hi heater, kambe kuhisa ka frictional ka raw material swita tlhela swi humesa frictional heat kuva ku hatlisisa fluidity, hikokwalaho screw compression ratio i yitsongo naswona ku khuluka i kutsongo, naswona rivilo ro rhendzeleka rifanele ku engeteriwa. Ku hisa ka frictional kuta tlula ka screw leyingana compression ratio leyikulu. Hikwalaho, hakanyingi ku vuriwa leswaku a ku na mutshila eku endleni ka tipulasitiki, naswona munhu loyi a twisisaka hi vukheta ndlela leyi muchini wu tirhaka ha yona hi yena n’wini. Ku hisiwa ka switirhisiwa swoka swinga tirhisiwanga ahi hitara ntsena, kambe na nkarhi wa frictional heat na suffocation. Kutani lexi i xiphiqo lexi tirhaka, naswona ntokoto wu pfuneta ku tlhantlha swiphiqo swa vuhumelerisi na vukorhokeri. Loko xikurufu xilava kuva na mbuyelo wa kahle swinene wo hlanganisa, minkarhi yin’wana swikwirikiri swohambana hambana swa switeji swimbirhi kumbe swikwirikiri swa twin-shaft swa endliwa naswona tinxaka tohambana hambana ta swikwirikiri ti avanyisiwile hi swiyenge kuva ku fikeleriwa mbuyelo wohambana hambana wo hlanganisa.
3. Vumba kumbe ku fa nhloko
Ku vumbiwa hi vuntshwa ka pulasitiki swi titshege hi nhloko ya xivumbeko kumbe ya die. Xiendliwa lexi vumbiweke hi injection xi ni swiphemu swinharhu, naswona xivumbeko lexi xi rharhanganile swinene. Mpimo wa ku hunguteka wu fanele ku tekeriwa enhlokweni. Letin’wana i tinhloko ta die ta swiendliwa leswi yaka emahlweni leswi nga ni xivumbeko xa xiphepherhele, lexi nga ni swiphepherhele ni lexi nga ni xivumbeko xa naliti. Loko kuri swivumbeko swo hlawuleka, Yi hlayiwa tani hi heterogeneous naswona yifanele ku nyikela nyingiso eka xiphiqo xaku kufumela naku vumba hiku hatlisa. Vunyingi bya michini ya plastiki yi endliwe kufana na ti injection syringes, naswona matimba ya extrusion lawa ya fambiwaka hi screw yata vanga ntshikelelo lowukulu eka swipfalo leswintsongo, leswi antswisaka vuhumelerisi bya kahle. Loko nhloko ya die yi endliwile tani hi xihahampfhuka, ndlela yo hangalasa switirhisiwa swoka swinga lulamisiwanga hiku ringana eka vuandlalo hinkwabyo, dizayini ya nhloko ya die ya hanger yina nkoka swinene, naswona nkarhi wo tshikelela wo saseka wu engetela mphakelo wa switirhisiwa swoka swinga swekiwanga leswi tiyeke swa pompo ya fish gill.
4. Ku kufumela
Ku engetela eka gede ya sprue leyi chelaka switirhisiwa swo ka swi nga tirhisiwanga, xivumbeko xa injection xi tlhela xi va na dizayini ya switirhisiwa swo ka swi nga tirhisiwanga leswi kufumetaka xiteji xa mati yo kufumeta. Extrusion molding yititshege hi cooling water channel eka roller kuva yi fikelela mbuyelo wo kufumela, handle ka air knife, mati yo kufumeta ya cheriwa hiku kongoma eka blowing bag, na ndlela yo kufumela yofana na hollow blowing.
5. Ku engeteriwa
Ku lulamisiwa nakambe na ku engeteriwa ka xitirhisiwa lexi hetiweke swi ta ndlandlamuxa mbuyelo. Xikombiso, strapping belt yi fambisiwa hi ti rollers tale mahlweni nale ndzhaku hi rivilo rohambana hambana kuva yivanga extension effect. Matimba ya tensile ya xiphemu xa oriented extension xa xitirhisiwa lexi hetiweke ya tiyisisiwa naswona aswi olovi ku handzula, kambe swa olova swinene ku handzula eka tlhelo ra horizontal. Ku hangalasiwa ka ntiko wa molecular switlhela swi khumba mbuyelo wa extension hinkarhi wa vuhumelerisi bya rivilo lerikulu. Switirhisiwa hinkwaswo leswi humesiweke kukatsa na ti fibre swina swiengetelo swohambana hambana. Vacuum na pressure forming swinga tlhela swi tekiwa tani hi xivumbeko xin’wana xa extension.
6. Ku hunguteka
Nchumu wun’wana ni wun’wana lowu nga tirhisiwangiki wu ni xiphiqo xa ku hunguteka. Kuhunguteka swivangiwa hiku anama ka mahiselo xikan’we naku hunguteka ka xirhami xikan’we na ntshikelelo wale ndzeni lowu endliwaka hinkarhi wa ku endliwa ka crystal. Hiku angarhela, ku andzisiwa ka mahiselo na ku hunguteka swa olova ku swi hlula. Swinga endliwa hiku engetela nkarhi wo kufumela eka ku lulamisiwa, naku ya emahlweni u hlayisa ntshikelelo. Crystalline raw material yitala kuva na ku hambana lokukulu ka shrinkage kutlula amorphous material, leyinga kwalomu ka thousandth eka PP. Khume-nhungu, kambe ABS yi kwalomu ka mune wa magidi ntsena. Xiphemu lexi xa ku hambana i xikulu swinene. Xiphemu lexi xifanele ku hluriwa eka mould, kutani swiengeteri leswi hungutaka kuhunguteka switala ku cheriwa kuva swi hlula xiphiqo xa LDPE yitala ku cheriwa eka extruded plate kuva yi antswisa xiphiqo xa necking.
Michini ya GTMSMART muchini wo endla thermoformings: 1 .
Nkarhi wa poso: Nov-18-2020