Ukubumba kweplastiki okungabonakali
Incazelo emfushane:
Imikhiqizo yepulasitiki esobala isetshenziswa kabanzi ekwakhiweni kwezimboni nasempilweni yabantu kulezi zinsuku. Transparent plastic umjovo udini kudlala indima ebalulekile emkhakheni plastic ukwakha.
Ngenxa yezinzuzo zesisindo esincane, ukuqina okuhle, ukubumba okulula nezindleko eziphansi, amapulasitiki asetshenziswa ngokuqhubekayo ukufaka ingilazi emikhiqizweni yanamuhla yezimboni kanye nansuku zonke, ikakhulukazi kuzinsimbi zomculo nezimboni zokupakisha. Kepha ngenxa yokuthi lezi zingxenye ezisobala zidinga ukwenza izinto obala okuhle, ukumelana nokugqoka okuphezulu kanye nokuqina komthelela omuhle, umsebenzi omningi kufanele wenziwe ekwakhiweni kwamaplastikhi kanye nenqubo, imishini nezinto zokubumba zenqubo yonke yokujova ukuze kuqinisekiswe ukuthi amapulasitiki asetshenziselwa ukufaka ingilazi (kamuva ezobizwa ngokuthi yiplastikhi esobala) inekhwalithi enhle yomhlaba, ukuhlangabezana nezidingo zokusetshenziswa.
I --- Ukwethulwa Kwepulasitiki Esobala ekusetshenzisweni Okuvamile
Njengamanje, amapulasitiki asobala asetshenziswa kakhulu emakethe yi-polymethyl methacrylate (PMMA), i-polycarbonate (i-PC), i-polyethylene terephthalate (PET), i-polyethylene terephthalate-1,4-cyclohexanedimethyl glycol ester (PCTG), iTritan Copolyester (Tritan), inayiloni esobala , i-acrylonitrile-styrene copolymer (AS), i-polysulfone (PSF), njll. Phakathi kwazo, i-PMMA, i-PC ne-PET yizona zepulasitiki ezisetshenziswa kakhulu ekubunjweni komjovo.
I-resin yepulasitiki ebonakalayo
2.PC, Polycarbonate）
Isakhiwo:
(1). Ukudlulisa okungenambala futhi okusobala, ukudluliswa kwama-88% - 90%. Inamandla aphezulu kanye ne-coefficient e-elastic, amandla amakhulu omthelela kanye nobubanzi bokushisa obubanzi.
(2). Ukusebenza obala okuphezulu nokudaya kwamahhala;
(3). Ukwakha ukuncipha kuphansi ((0.5% -0.6%) nokuzinza kobukhulu kuhle. Ubuningi 1.18-1.22g / cm ^ 3.
(4). Ukubuyisela emuva okuhle kwelangabi nokugcina ilangabi i-UL94 V-2. Izinga lokushisa lokushisa elishisayo cishe liyi-120-130 ° C.
(5). Izici ezinhle kagesi, ukusebenza kahle kokufakwa (umswakama, izinga lokushisa eliphakeme nakho kungagcina ukuzinza kukagesi, kuyinto ekahle yokukhiqiza izingxenye zikagesi nezikagesi);
(6) HDTis iphakeme;
(7). Isimo sezulu esihle;
(8). I-PC ayinaphunga futhi ayinabungozi emzimbeni womuntu futhi ihambisana nokuphepha kwenhlanzeko.
Isicelo:
(1). Ukukhanya kwe-Optical: okusetshenziselwa ukukhiqiza ama-lampshades amakhulu, ingilazi evikelayo, imiphongolo yesokunxele neyesokudla yezinsimbi zomshini, njll. Ingasetshenziselwa kabanzi izinto ezisobala ezindizeni.
(2). Izinto ezisebenza ngogesi nange-elekthronikhi: IPolycarbonate iyinto enhle kakhulu yokuvikela ukukhiqiza izixhumi ezivikela, amafreyimu wekhoyili, amapayipi okufaka amapayipi, ukuvikela ama-bushings, amagobolondo ocingo nezingxenye, amagobolondo webhethri wezibani zamaminerali, njll.Ingasetshenziswa futhi ukwenza izingxenye ngokunemba okuphezulu , njengama-compact discs, izingcingo, amakhompyutha, ama-video recorders, ukushintshana ngocingo, ukudlulisela amasiginali neminye imishini yokuxhumana. Ukuthinta okuncane kwePolycarbonate nakho kusetshenziswa kabanzi njenge-capacitor. Ifilimu le-PC lisetshenziselwa ukuvikela izikhwama, amateyipu, amateyipu evidiyo anombala, njll.
(3). Imishini nemishini: Isetshenziselwa ukwenza amagiya ahlukahlukene, ama-racks, amagiya ezikelemu, ama-bearings, ama-cams, amabhawodi, ama-levers, ama-crankshafts, ama-ratchets nezinye izingxenye zemishini nemishini, njengamagobolondo, amakhava nozimele.
(4). Imishini yezokwelapha: izinkomishi, amasilinda, amabhodlela, okokusebenza kwamazinyo, iziqukathi zezidakamizwa nezinsimbi zokuhlinza ezingasetshenziselwa izinhloso zokwelashwa, ngisho nezinso zokufakelwa, amaphaphu okufakelwa nezinye izitho zokufakelwa.
3.PET (Polyethylene terephthalate)
Isakhiwo:
(1). I-PET resin ingu-opalescent eguqukayo noma engenambala, enesisindo esingu-1.38g / cm ^ 3 nokudluliswa okungama-90%.
(2). Amapulasitiki e-PET anezinto ezinhle ezibonakalayo, futhi ama-plastiki amorphous PET anokukhanya okuhle kokubonakalayo.
(3) Amandla we-PET aqine kakhulu, aphindwe kathathu kune-PC. Inokuqina okukhulu kakhulu kuplastikhi we-thermoplastic ngenxa yokumelana kwayo okuhle nokushintshwa kwe-U, ukukhathala nokungqubuzana, ukugqoka okuphansi nobulukhuni obuphakeme. Yenziwe ngemikhiqizo enezindonga ezincanyana ezifana namabhodlela epulasitiki namafilimu namafilimu epulasitiki.
(4). Ukushisa kwe-deformation okushisayo 70 ° C. I-Flame retardant ingaphansi kwe-PC
(5). Amabhodlela e-PET aqinile, asobala, awanabo ubuthi, awangeneki futhi anesisindo esincane.
(6). Isimo sezulu sihle futhi singasetshenziswa ngaphandle isikhathi eside.
(7). Ukusebenza kokufakwa kukagesi kuhle, futhi akuthinteki kangako ngamazinga okushisa.
Isicelo:
(1). Ukusetshenziswa kwebhodlela lokupakisha: Ukusetshenziswa kwalo kuthuthukisiwe kusuka ekuphuzeni okune-carbonated kuya kubhodlela kabhiya, ibhodlela lamafutha elidliwayo, ibhodlela le-condiment, ibhodlela lemithi, ibhodlela lezimonyo nokunye.
(2). Izinto ezisebenza ngogesi nezikagesi: izixhumi zokukhiqiza, amashubhu amatshe wekhoyili, amagobolondo wesifunda ahlanganisiwe, amagobolondo e-capacitor, amagobolondo e-transformer, izesekeli ze-TV, ama-tuners, amaswishi, amagobolondo we-timer, ama-fuse okuzenzakalelayo, abakaki bezimoto nokudluliswa, njll.
(3). Izesekeli zezimoto: njengesembozo sephaneli yokusabalalisa, ikhoyili yokushisa, ama-valve ahlukahlukene, izingxenye zokukhipha, ikhava yokusabalalisa, ikhava yensimbi yokulinganisa, ikhava yezimoto ezincane, njll., Ingasebenzisa futhi impahla enhle kakhulu yokumboza, isicwebezelisi sobuso nokuqina kwe-PET ukwenza imoto yangaphandle izingxenye.
(4). Imishini nemishini: ukukhiqizwa kwamagiya, ikham, izindlu zempompo, ibhande le-pulley, ifreyimu yezimoto nezingxenye zewashi, nakho kungasetshenziselwa ipani lokubhaka i-microwave oven, uphahla oluhlukahlukene, amabhodi angaphandle namamodeli
(5). Inqubo yokwakha i-PET plastic. Ingafakwa, ikhishwe, ishaywe, ifakwe, iboshwe, yenziwe ngomshini, i-electroplated, i-vacated plated futhi iphrintiwe.
I-PET ingenziwa ifilimu lapho ubukhulu bayo bungu-0.05 mm kuye ku-0.12 mm ngenqubo yokwelula. Ifilimu ngemuva kokuzinweba inobulukhuni obuhle nobulukhuni. Ifilimu engabonakali ye-PET iyona engcono kakhulu yokukhetha ifilimu evikelayo yesikrini se-LCD. Ngasikhathi sinye, ifilimu ye-PET nayo iyinto ejwayelekile ye-IMD / IMR ngenxa yezakhiwo zayo ezinhle zomshini.
Iziphetho zokuqhathanisa ze-PMMA, i-PC, i-PET zimi kanje:
Ngokuya ngemininingwane ekuThebula 1, i-PC iyindlela efanelekile yokusebenza okuphelele, kepha ikakhulukazi ngenxa yezindleko eziphezulu zezinto zokusetshenziswa kanye nobunzima benqubo yokubumba umjovo, ngakho-ke i-PMMA kusengukukhetha okuyinhloko. (Okwemikhiqizo enezidingo ezijwayelekile), ngenkathi i-PET isetshenziswa kakhulu ekupakisheni nasezitsheni ngoba idinga ukwelulwa ukuthola izakhiwo ezinhle zomshini.
II --- Izakhiwo zomzimba nokusetshenziswa kwamapulasitiki asobala asetshenziswe ekubunjweni komjovo:
Ama-plastiki abonakalayo kufanele aqale abe nokubonakala okuphezulu, futhi okwesibili, kufanele abe namandla athile futhi agqoke ukumelana, ukumelana nomthelela, ukumelana nokushisa okuhle, ukumelana kwamakhemikhali okuhle kakhulu nokumuncwa kwamanzi aphansi. Kungale ndlela kuphela lapho bangahlangabezana nezidingo zokubonisa ngale futhi bahlale bengashintshiwe isikhathi eside besetshenziswa. Ukusebenza nokusetshenziswa kwe-PMMA, i-PC ne-PET kuqhathaniswa kanje.
1. PMMA (Acrylic)
Isakhiwo:
(1). Okungenambala okusobala, okusobala, okusobala okungu-90% - 92%, ukuqina kune-silicon ingilazi izikhathi ezingaphezu kwezingu-10.
(2). Ukukhanya, ukuvikela, ukucubungula kanye nesimo sezulu.
(3). Inokubonakala okuphezulu nokukhanya, ukumelana nokushisa okuhle, ukuqina, ukuqina, ukushisa kokushisa okushisayo 80 ° C, ukugoba amandla 110 Mpa.
(4) .Ubukhulu 1.14-1.20g / cm ^ 3, ukushisa kwe-deformation 76-116 ° C, okwenza ukuncipha kube ngu-0.2-0.8%.
(5). Umugqa wokunwebeka komugqa ngu-0,00005-0.00009 / ° C, izinga lokushisa lokushisa elishisayo lingu-68-69 ° C (74-107 ° C).
(6). Iyancibilika kumakhemikhali awuketshezi anjenge-carbon tetrachloride, i-benzene, i-toluene dichloroethane, i-trichloromethane ne-acetone.
(7). Non-enobuthi futhi imvelo.
Isicelo:
(1). Isetshenziswa kabanzi ezingxenyeni zensimbi, amalambu ezimoto, amalensi we-optical, amapayipi asobala, amalambu okukhanyisa umgwaqo.
(2). I-PMMA resin yinto engeyona enobuthi futhi enobungani bemvelo, engasetshenziselwa ukukhiqiza i-tableware, impahla yokuhlanzeka, njll.
(3). Inokusimama okuhle kwamakhemikhali kanye nesimo sezulu. I-PMMA resin akulula ukukhiqiza imfucumfucu ebukhali lapho iphukile. Isetshenziswa njenge-plexiglass esikhundleni sengilazi yesilica ukwenza iminyango yokuphepha namawindi.
Ukuhlangana kwepayipi okusobala kwe-PMMA
Ipuleti lezithelo le-PMM
Ikhava yesibani se-PMMA esobala
Ithebula 1. Ukuqhathaniswa kokusebenza kwepulasitiki esobala
| Impahla | Ubuningi (g / cm ^ 3) | Amandla eqine (Mpa) | Amandla we-Notcimpact (j / m ^ 2) | Ukudlulisela (%) | Ukushisa Okushisayo Okushisayo (° C) | Okuqukethwe kwamanzi okuvumelekile (%) | Izinga lokuncipha (%) | Gqoka ukumelana | Ukumelana namakhemikhali |
| Izinto | |||||||||
| PMMA | 1.18 | 75 | 1200 | 92 | 95 | 4 | 0.5 | mpofu | kuhle |
| PC | 1.2 | 66 | 1900 | 90 | 137 | 2 | 0.6 | isilinganiso | kuhle |
| PET | 1.37 | 165 | 1030 | 86 | 120 | 3 | 2 | kuhle | kuhle kakhulu |
Ake sigxile ku-PMMA, i-PC, i-PET ebonakalayo ukuze sixoxe ngenqubo yendawo nomjovo wepulasitiki obala ngale ndlela elandelayo:
III --- Izinkinga Ezijwayelekile Okumele Zibonwe Enqubeni Yokubumba Okungabonakali Kweplastiki.
Amapulasitiki angabonakali, ngenxa yokudluliswa kwawo okuphezulu, kumele adinge ikhwalithi ephezulu yomkhiqizo wepulasitiki.
Akufanele babe nokukhubazeka okufana namabala, i-blowhole, i-whitening, i-fog halo, izindawo ezimnyama, ukushintsha kombala kanye ne-gloss engalungile. Ngakho-ke, izidingo eziqinile noma ezikhethekile kufanele zinakwe ekwakhiweni kwezinto zokusetshenziswa, imishini, isikhunta kanye nemikhiqizo phakathi nayo yonke inqubo yokujova.
Okwesibili, ngoba oplastikhi abasobala banezinga eliphezulu lokuncibilika nokufudumala okungekuhle, ukuze kuqinisekiswe ikhwalithi ephezulu yemikhiqizo, izinqubo zenqubo ezinjengokushisa okuphezulu, ingcindezi yomjovo nejubane lomjovo kufanele zilungiswe kancane, ukuze amapulasitiki agcwaliswe ngobumba , futhi ukucindezeleka kwangaphakathi ngeke kwenzeke, okuzoholela ekuguqulweni nasekuqhekekeni kwemikhiqizo.
Amaphuzu alandelayo kufanele anakwe lapho kulungiswa izinto zokusetshenziswa, izidingo zemishini nokubunjwa, inqubo yokubumba umjovo kanye nokwelashwa kwemikhiqizo eluhlaza.
Ukulungiselela nokomiswa kwempahla eluhlaza.
Ngoba noma yikuphi ukungcola kuplastikhi kungathinta ukubonakala kwemikhiqizo, kuyadingeka ukuthi unake ukubekwa uphawu enqubweni yokugcina, ukuhambisa nokondla ukuze kuqinisekiswe ukuthi izinto zokusetshenziswa zihlanzekile. Ikakhulukazi lapho impahla eluhlaza inamanzi, izokwehla ngemuva kokushisa, ngakho-ke kufanele yomile, futhi lapho ukubunjwa komjovo, ukondla kufanele kusebenzise i-hopper eyomile. Futhi qaphela ukuthi uma kwenziwa inqubo yokomisa, okokufaka komoya kufanele kuhlungwe futhi kukhishwe isidumbu ukuqinisekisa ukuthi izinto zokusetshenziswa azingcolisiwe. Inqubo yokumisa iboniswa kuThebula 2.
Ikhava yesibani se-PC yemoto
Ikhava ye-PC esobala yesitsha
Ipuleti le-PC
Ithebula 2: Inqubo yokoma yamapulasitiki asobala
| idatha | ukushisa okumile (0C) | isikhathi sokomisa (ihora) | ukujula kwempahla (mm) | ukuphawula |
| impahla | ||||
| PMMA | 70 ~ 80 | 2 ~ 4 | 30 ~ 40 | Ukomiswa Kwomoya Oshisayo Womoya |
| PC | 120 ~ 130 | > 6 | <30 | Ukomiswa Kwomoya Oshisayo Womoya |
| PET | 140 ~ 180 | 3 ~ 4 | Okuqhubekayo omiswe iyunithi |
2. Ukuhlanzwa komgqomo, isikulufa nezinsiza
Ukuze uvimbele ukungcoliswa kwezinto zokusetshenziswa nokuba khona kwezinto ezindala noma ukungcola emigodini yesikulufa nezesekeli, ikakhulukazi i-resin enokuqina kokushisa okushisayo, i-ejenti yokuhlanza isikulufa isetshenziselwa ukuhlanza izingxenye ngaphambi nangemva kokuvala, ukuze ukungcola ayikwazi ukunamathela kubo. Lapho ingekho i-ejenti yokuhlanza isikulufa, i-PE, i-PS nezinye izinhlaka zingasetshenziswa ukuhlanza isikulufu. Lapho ukuvalwa kwesikhashana kwenzeka, ukuvimbela okokusebenza ukuthi kungahlali ekushiseni okuphezulu isikhathi eside futhi kubangele ukonakala, i-dryer kanye nomgqomo wokushisa kufanele wehliswe, njenge-PC, i-PMMA nokunye ukushisa komgqomo kufanele kwehliswe kube ngaphansi kuka-160 C ( Ukushisa kwe-hopper kufanele kube ngaphansi kuka-100 C we-PC)
3. Izinkinga ezidinga ukunakwa ekwakhiweni kokufa (kufaka phakathi ukwakheka komkhiqizo) Ukuze uvimbele ukuvinjelwa kwe-backflow noma ukupholisa okungalingani okuholele ekwakhiweni okungalungile kwepulasitiki, ukukhubazeka kwendawo kanye nokuwohloka, amaphuzu alandelayo kufanele anakwe lapho kuklanywa isikhunta.
A). Ubukhulu bodonga kufanele bufanane ngangokunokwenzeka futhi nomthambeka owonakalisayo kufanele ube mkhulu ngokwanele;
B). Inguquko kufanele ihambe kancane. Ushintsho olubushelelezi ukuvimbela amakhona abukhali. Akufanele kube khona igebe emaphethelweni abukhali, ikakhulukazi kwimikhiqizo ye-PC.
C). Isango. Umgijimi kufanele abe banzi futhi abe mfushane ngangokunokwenzeka, futhi indawo esangweni kufanele isethwe ngokuncipha nenqubo yokuncipha, futhi kufanele kusetshenziswe kahle isiqandisi sefriji lapho kudingeka.
D). Ubuso bedayi kufanele bushelelezi futhi bube nobunzima obuphansi (okungcono ngaphansi kuka-0.8);
E). Izimbobo zokukhipha. Ithangi kufanele lanele ukukhipha umoya negesi ekuncibilikeni ngesikhathi.
F). Ngaphandle kwe-PET, ukushuba kodonga akufanele kube mncane kakhulu, imvamisa kungabi ngaphansi kuka-l mm.
4. Izinkinga ezidinga ukunakekelwa kwinqubo yokubumba umjovo (kufaka phakathi izidingo zemishini yokubumba umjovo) Ukuze unciphise ukukhubazeka kwangaphakathi nokukhubazeka kwekhwalithi ephezulu, kufanele kunakwe kulezi zici ezilandelayo kwinqubo yokubumba umjovo.
A). Isikulufa esikhethekile nomjovo wokubumba umshini onombhobho ohlukile wokulawula ukushisa kufanele kukhethwe.
B). Umswakama ophakeme womjovo kufanele usetshenziswe ekushiseni komjovo ngaphandle kokubola kwe-resin yepulasitiki.
C). Ingcindezi yomjovo: ngokuvamile iphakeme ukunqoba isici se-melt viscosity ephezulu, kepha ingcindezi ephezulu kakhulu izokhiqiza ukucindezeleka kwangaphakathi, okuzoholela ekudilikeni nasekusombululeni okunzima;
D). Isivinini somjovo: Esimweni sokugcwaliswa okugculisayo, ngokuvamile kufanelekile ukuba phansi, futhi kungcono ukusebenzisa umjovo wesigaba esisheshayo esisheshayo;
E). Ingcindezi yokubamba isikhathi nesikhathi sokwakha: esimweni sokwanelisa ukugcwaliswa komkhiqizo ngaphandle kokukhiqiza ukucindezela namabhamuza, kufanele kube kufushane ngangokunokwenzeka ukunciphisa isikhathi sokuhlala sincibilike emgqonyeni;
F). Isivinini se-Screw kanye nengcindezi yangemuva: ngesisekelo sokwanelisa ikhwalithi ye-plasticizing, kufanele ibe phansi ngangokunokwenzeka ukuvimbela ukuthi kungenzeka kwehle;
G). Ukushisa kwesikhunta: Ikhwalithi yokupholisa yemikhiqizo inethonya elikhulu kwikhwalithi, ngakho-ke izinga lokushisa lesikhunta kumele likwazi ukulawula kahle inqubo yalo, uma kungenzeka, izinga lokushisa lesikhunta kufanele libe ngaphezulu.
5. Ezinye izici
Ukuze uvimbele ukonakala kwekhwalithi ephezulu, i-ejenti ekhishwayo kufanele isetshenziswe kancane ngangokunokwenzeka ekubunjweni komjovo jikelele, futhi into evuselelekayo akufanele ibe ngaphezu kwama-20%.
Kuyo yonke imikhiqizo ngaphandle kwe-PET, ukwenziwa ngemuva kufanele kwenziwe ukuqeda ukucindezeleka kwangaphakathi, i-PMMA kufanele yomiswe ku-70-80 ° C umjikelezo womoya oshisayo amahora amane, i-PC kufanele ishiswe ngo-110-135 ° C emoyeni ohlanzekile, i-glycerin , uphalafini ongamanzi, njll. Isikhathi sincike kumkhiqizo, futhi isidingo esiphezulu singaphezu kwamahora ayi-10. I-PET kufanele iluleke nge-biaxial ukuthola izakhiwo ezinhle zomshini.
Amashubhu we-PET
Ibhodlela le-PET
Icala le-PET
IV --- Injection Molding Technology of Transparent Plastics
Izici zobuchwepheshe zamapulasitiki asobala: Ngaphandle kwezinkinga ezivamile ezingenhla, amapulasitiki asobala nawo anezici ezithile zobuchwepheshe, ezifingqwe ngokulandelayo:
1. Inqubo yezimpawu ze-PMMA. I-PMMA ine-viscosity ephezulu futhi ayinamanzi amaningi, ngakho-ke kufanele ijojowe ngethempelesha ephezulu yempahla nokucindezela komjovo. Ithonya lokushisa komjovo likhulu kunokucindezela komjovo, kepha ukwanda kwengcindezi yomjovo kuyazuzisa ukwenza ngcono izinga lokuncipha kwemikhiqizo. Ububanzi bokushisa komjovo bubanzi, izinga lokushisa elincibilikayo lingu-160 ° C futhi izinga lokushisa lokubola lingu-270 ° C ngakho-ke ububanzi bezinqubo zokushisa kokushisa bubanzi futhi inqubo yinhle. Ngakho-ke, ukwenza ngcono uketshezi, singaqala ngokushisa komjovo. Umthelela omubi, ukungavumi ukugqoka kahle, ukuklwebheka kalula, ukuqhekeka kalula, ngakho-ke kufanele sithuthukise izinga lokushisa kofayo, sithuthukise inqubo ye-condensation, ukunqoba la maphutha.
2. Inqubo yezici ze-PC PC ine-viscosity ephezulu, ukushisa okuphezulu okuncibilikayo noketshezi olubi, ngakho-ke kufanele ijojowe ezingeni lokushisa eliphakeme (phakathi kuka-270 no-320T). Ngokuqhathanisa, ububanzi bokulungiswa kokushisa kwezinto ezibonakalayo kuncane, futhi ukucubungula akunakulingana ne-PMMA. Ingcindezi yokujova ayinamphumela omncane ekuguqukeni kwamanzi, kepha ngenxa ye-viscosity ephezulu, isadinga ingcindezi enkulu yomjovo. Ukuze uvimbele ukucindezeleka kwangaphakathi, isikhathi sokubamba kufanele sibe sifushane ngangokunokwenzeka. Izinga lokuncipha likhulu futhi ubukhulu buzinzile, kepha ukucindezeleka kwangaphakathi komkhiqizo kukhulu futhi kulula ukuqhekeka. Ngakho-ke, kunconywa ukuthi uthuthukise uketshezi ngokukhuphula izinga lokushisa kunengcindezi, futhi unciphise nokwenzeka kokuqhekeka ngokwandisa izinga lokushisa kofile, uthuthukise ukwakheka kofayo nokwelashwa ngemuva. Lapho isivinini somjovo siphansi, isango livame ukonakala nokunye ukukhubazeka, izinga lokushisa lemisebe yomsakazo kufanele lilawulwe ngokwehlukana, izinga lokushisa lesikhunta kufanele libe phezulu, futhi ukumelana komgijimi nesango kufanele kube kuncane.
3. Izici zobuchwepheshe ze-PET PET zinokushisa okuphezulu okwakhekayo nobubanzi obuncane bokulungiswa kokushisa kwempahla, kepha kune-fluidity enhle ngemuva kokuncibilika, ngakho-ke inokusebenza okungekuhle, futhi ne-anti-prolongation device ivame ukungezwa kumbhobho. Amandla wokusebenza nokusebenza ngemuva kokujova akuphezulu, kumele ngenqubo yokwelula nokuguqulwa kungathuthukisa ukusebenza. Ukulawulwa okunembile kwezinga lokushisa lokufa ukuvikela ukugoqana.
Ngenxa yesici esibalulekile sokushumeka, kunconywa umgijimi oshisayo. Uma izinga lokushisa likadali liphezulu, isicwebezelisi saphezulu sizoba sibi futhi nokucekelwa phansi kwensimbi kube nzima.
Ithebula 3. Injection Molding Process Parameters
| impahla yepharamitha | ingcindezi (MPa) | isivinini sesikulufu | ||
| umjovo | gcina ingcindezi | ingcindezi emuva | (ngomzuzu) | |
| PMMA | 70 ~ 150 | 40 ~ 60 | 14.5 ~ 40 | 20 ~ 40 |
| PC | 80 ~ 150 | 40 ~ 70 | 6 ~ 14.7 | 20 ~ 60 |
| PET | 86 ~ 120 | 30 ~ 50 | 4.85 | 20 ~ 70 |
| impahla yepharamitha | ingcindezi (MPa) | isivinini sesikulufu | ||
| umjovo | gcina ingcindezi | ingcindezi emuva | (ngomzuzu) | |
| PMMA | 70 ~ 150 | 40 ~ 60 | 14.5 ~ 40 | 20 ~ 40 |
| PC | 80 ~ 150 | 40 ~ 70 | 6 ~ 14.7 | 20 ~ 60 |
| PET | 86 ~ 120 | 30 ~ 50 | 4.85 | 20 ~ 70 |
V --- Amaphutha Ezingxenye Zepulasitiki Esobala
Lapha sidingida kuphela ukukhubazeka okuthinta ukubonakala kwemikhiqizo. Cishe kukhona amaphutha alandelayo:
Amaphutha emikhiqizo esobala nezindlela zokukunqoba:
I-1 Craze: i-anisotropy yengcindezi yangaphakathi ngesikhathi sokugcwalisa nokuncipha, kanye nengcindezi ekhiqizwa ohlangothini oluqonde mpo, yenza i-resin igeleze phezulu, kuyilapho ukuma okungahambi nokugeleza kukhiqiza intambo ye-flash enenkomba ehlukile yokubonisa. Lapho inweba, imifantu ingenzeka kumkhiqizo.
Izindlela zokunqoba yilezi: ukuhlanza isikhunta kanye nomgqomo womshini wokujova, ukomisa izinto zokusetshenziswa ngokwanele, ukwandisa igesi yokukhipha, ukukhuphula ingcindezi yomjovo nengcindezi yangemuva, nokufaka umkhiqizo omuhle kakhulu. Uma okokusebenza kwe-PC kungashiswa kube ngaphezu kwe-160 ° C imizuzu emi-3 - 5, khona-ke ingapholiswa ngokwemvelo.
2. I-Bubble: Amanzi namanye amagesi ku-resin awakwazi ukukhishwa (ngesikhathi senqubo yokubumbana kwesikhunta) noma "ama-vacuum bubbles" akhiwa ngenxa yokugcwaliswa okunganele kwesikhunta kanye nokujiya okushesha kakhulu kwendawo yokugoqa. Izindlela zokunqoba zifaka phakathi ukukhuphula ukukhipha nokumisa ngokwanele, ukungeza isango odongeni lwangemuva, ukukhuphula ingcindezi nesivinini, ukunciphisa izinga lokushisa nokuncibilikisa isikhathi sokupholisa.
3. I-gloss surface gloss: ikakhulukazi ngenxa yobukhulu be-die, ngakolunye uhlangothi, ukuvuthwa kusenesikhathi, ukuze i-resin ingakwazi ukukopisha isimo sendawo yokufa, konke okwenza ubuso be-die bungalingani , futhi wenze umkhiqizo ulahlekelwe isicwebezelisi. Indlela yokunqoba le nkinga ukukhulisa ukushisa okuncibilikayo, ukushisa kwesikhunta, ingcindezi yomjovo kanye nomjovo wejubane, nokwandisa isikhathi sokupholisa.
4. Ukuqhuma kwenyikima: ukuqhuma okujiyile okwakhiwe kusuka maphakathi kwesango eliqondile. Isizathu ukuthi i-viscosity encibilikile iphezulu kakhulu, impahla engaphambili ingafinyelelana emgodini, bese kuthi okokusebenza kudabule umphezulu we-condensation, okuholele ekugqashukeni kobuso. Izindlela zokunqoba yilezi: ukukhuphula ingcindezi yomjovo, isikhathi somjovo, isikhathi somjovo nesivinini, ukukhuphula izinga lokushisa kwesikhunta, ukukhetha imibhobho efanelekile nokwandisa imithombo yokushaja ebandayo.
5. Mhlophe. Inkungu halo: Idalwa kakhulu wuthuli oluwela ezintweni ezingavuthiwe emoyeni noma okuqukethwe umswakama okweqile kwezinto zokusetshenziswa. Izindlela ezinqobayo yilezi: ukususa ukungcola komshini wokubumba umjovo, ukuqinisekisa ukoma okwanele kwezinto zokusetshenziswa zepulasitiki, ukulawula ngokunembile ukushisa okuncibilikayo, ukukhuphula izinga lokushisa kwesikhunta, ukukhuphula ingcindezi emuva yomjovo wokubumba nokunciphisa umjikelezo womjovo. 6. Intuthu emhlophe. Indawo emnyama: Kubangelwa kakhulu ukubola noma ukonakala kwenhlaka emgqonyeni obangelwe ukushisa kwendawo kwepulasitiki emgqonyeni. Indlela enqobayo ukunciphisa ukushisa okuncibilikayo nesikhathi sokuhlala kwezinto zokusetshenziswa emgqonyeni, futhi kwandiswe imbobo yokukhipha.
Inkampani yakwaMestech igxile ekuhlinzekeni amakhasimende ngesibani esibonakalayo, imikhiqizo yezokwelapha yephaneli yesikhunta nokukhiqizwa komjovo. Uma udinga lokhu, sicela uxhumane nathi. Siyajabula ukukunikeza leyo nsizakalo.
