Phezulu - Ishidi le-polyethylene (HDPE) lisetshenziswa kabanzi kumakhemikhali, ekwakhiweni, nasemishini ekhiqiza izimboni ngenxa yokuqina kwalo okuhle kwamakhemikhali, ukugqoka okulula, kanye nezakhiwo ezingasindi. Kodwa-ke, izimo ezihlukile zohlelo lokusebenza zikhona umehluko obalulekile ezifundweni zokusebenza kwezinto ezibonakalayo zeshidi le-HDPE, okwenza ukukhetha okufanelekile kwezinto ezibalulekile ukuze kuqinisekiswe ikhwalithi yephrojekthi kanye nokuphila isikhathi eside. Lo mbhalo uhlaziya ngokuhlelekile amasu wokukhethwa kwezinto ezibonakalayo ze-HDPE kusuka ezinhlotsheni ezintathu: Izinto ezibonakalayo eziyisisekelo, amapharamitha asemqoka ukusebenza, kanye nezimo ezijwayelekile zohlelo lokusebenza.
Izakhiwo eziyisisekelo namazinga wokuhlukaniswa kwezinto ze-HDPE
I-HDPE iyi-polsalline polyethylene resin enamaketanga ama-molelisar agcwele kanye nobuningi ngokujwayelekile kusuka ku-0.941 kuya ku-0.965 g / cm³. Kususelwa kumehluko ezinqubweni zokukhiqiza, imikhiqizo evamile ye-HDPE Sheet emakethe ingahlukaniswa ngezigaba ze-extred and compression - Izinhlobo ezibunjiwe. Lowo owayekade unikeza ukufana okuphezulu kakhulu (ukubekezelelana ± 0.5mm) futhi kufanelekile ukuthola imishini yokunemba yokulinganisa. Lesi sakamuva sinikezela amandla aphezulu omthelela (ama-Impact athonya eliphakeme kakhulu kune- noma alingane ne-20 KJ / M²) futhi alungele izinhlelo zokusebenza ngokuya ngemithwalo enamandla.
Mayelana nokusebenza okuyisisekelo, okuphezulu -} ishidi lekhwalithi ye-HDPE kufanele lihlangabezane nezinkomba ezilandelayo ezibalulekile:
1. Ukumelana Kwamakhemikhali: Ukuqinisekiswa kwama-acid anamandla afana ne-sulfuric acid ne-nitric acid ekugxiliseni okungaphansi kwama-80%, kanye nama-solvents ajwayelekile we-organic.
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I-3. Ukushisa kokushisa okushisa
Isisekelo sokukhetha kwamapharamitha asemqoka
(1) Imishini yokuqhathanisa impahla
Ngezicelo ezilandela imithwalo esindayo noma ekushayweni njalo (njengezimakethe zemishini yokufanisa), ukumelana kwezinto ezibonakalayo kuyinto eza kuqala. Ngokungeza 2% - 5% Ultra - I-polyethylene ephezulu (UHMWPE) kuya kokuhlanganiswa, ukugqoka kweshidi kungancishiswa ku-0.08-0.0.08-0 Ngezinhlelo zokusebenza zokusekela ezesakhiwo (ezifana nama-Guardraling wesikhashana), amamaki aphezulu aphezulu anamandla ashubile aphezulu noma alingana nama-25 MPA futhi alingana ne-modulus e-800 MPA kufanele akhethwe.
(2) Izisombululo zemvelo zokuhlobisa imvelo
Ku-Long - Ithemu Lokusetshenziswa Kwangaphandle, ukuguga kwe-UV kuyindlela eyisisekelo yokwehluleka. Amashidi we-HDPE aguqulwe ngokuqukethwe okumnyama okungu-2%<3 after 500 hours). For applications involving contact with food or pharmaceutical media, sanitary-grade resins that comply with FDA 21 CFR 177.1520 must be selected to ensure heavy metal migration is less than 0.1 ppm.
(3) Ukusebenza kokuhambisana
Lapho ujoyina amashidi esebenzisa i-welding ye-thermal, kunconywa ukukhetha okuphakathi - kuya ebangeni eliphansi le- {{0} Lokhu kuqinisekisa amandla ahlangene we-Weld (amandla okugunda amakhulu kune- noma alingana nama-85% ezinto zomzali) ngenkathi egwema ukwehla kwamandla okubangelwa ufforidity ngokweqile. Ngokusika i-CNC, ibanga lokusika mahhala nge-MFR> 0.5 g / 10 imiz linconyelwe ukunciphisa kakhulu amathuluzi ukugqoka.
Izisombululo ezibonakalayo zezimo ezijwayelekile zohlelo lokusebenza
(1) Ukuvikelwa Komoya Amakhemikhali
Okwezicelo zethangi lokufaka amathangi ezivezwe kwimithombo ye-corlosive efana ne-hydrochloric acid kanye ne-sodium hydroxide, kunconywa izinto eziyinhlanganisela ze-HDPE composite. I-modulus ye-Young Yout ikwazi ukufinyelela ku-1200 MPA ngenkathi igcina ukumelana kahle kwamakhemikhali (akukho ukuwohloka ngemuva kokucwiliswa esikhandla ku-50% isixazululo sonyaka owodwa).
(2) Izinhlelo zokuvikela ezenziwa ngomshini
Okomshini wamathuluzi womshini wokuqondisa umgadli onogada, ukunemba - ishidi elibunjiwe elinobuqili obungaphezulu kweRa ngaphansi noma elilingana no-0.8 μm kanye nokuqina okulinganiselwe kwasogwini D 60-70 kuyakhethwa. Lokhu kuvimbela ngempumelelo umthelela we-chip wensimbi futhi kuvimbela ukugqoka ngokweqile emugqeni wezitimela.
(3) Izikhungo Zokuvikela Ezemvelo
Ngezinhlelo zesembozo se-secure sokukhucululwa kwendle, ishidi elingasindi le-HDPE elinobuningi be-foam le-0.7 g / cm bunganciphisa isisindo sesakhiwo ngo-40% ngenkathi kugcinwa umthwalo olwanele -.
Ukukhetha okubonakalayo kwe-HDPE Sheating empeleni kuyinqubo yokuhambelana kahle kwamapharamitha wokusebenza ngezidingo zesicelo. Emikhuba yobunjiniyela, izici eziningi, njengamandla okwenziwa ngomshini, ukumelana kwemvelo, kanye nokusebenza kwezomnotho, kufanele kubhekwe ngokugcwele, futhi ukuthembeka kwesisombululo esikhethiwe kumele kuqinisekiswe ngokuhlolwa okukhethiwe. Ngentuthuko kubuchwepheshe bokuhlanganisa nobuchwepheshe, izixazululo ezenziwe ngezifiso ze-HDPE Sheet zishayela uhlelo lokusebenza kuzicelo ezifunwa kakhulu. Lokhu kudinga izinto zonjiniyela bezinto eziqhubekayo ukujulisa ukuqonda kwabo izindlela ezixhumanisa izakhiwo ze-microscucture kanye ne-macroscopic.
