Kungani imigqa emnyama ivela ngokuphindaphindiwe ku-extruder? Lesi sihloko sikufundisa ukuthi unganquma kanjani ngokushesha ukuthi ibangelwa inkinga yomphongolo noma isikulufu.

Imigqa emnyama evamisile kuma-extruder ibangelwa ikakhulukazi ukungcoliswa kwempahla engavuthiwe, amadiphozithi ekhabhoni emishinini, nezinto ezigugile. Lezi zinkinga zidinga uphenyo kanye nokutholwa ngokwezinyathelo ezingezansi.

1. Izinto ezisetshenziswayo kanye nezindaba ezisizayo

Lesi yisizathu esivame kakhulu futhi kufanele sibekwe eqhulwini.

Ukungcola kwempahla eluhlaza: Izinto ezimnyama zangaphandle, njengothuli, izinsalela zensimbi, noma amanye ama-masterbatches, zingase zingeniswe ezintweni zokusetshenziswa ngesikhathi sokukhiqiza, ukugcinwa, noma ukuthutha.

Umswakama we-Raw material noma ukuwohloka: Umswakama owedlulele ezintweni ezingavuthiwe ungaholela ku-carbonization ngesikhathi sokukhishwa kwezinga lokushisa eliphezulu, okuholela kumachashaza amnyama. Ukuwohloka kokugcinwa isikhathi eside kungaholela ekwakhekeni kwezinto ezishisiwe ezimnyama.

I-Masterbatch noma izinkinga ezingeziwe: Ukuhlakazeka kabi kwe-masterbatch kungabangela izinhlayiya ezihlanganisiwe ezimnyama. Ukwengeza ngokweqile izithasiselo (ezifana Antioxidants) kungaholela carbonization emazingeni okushisa aphezulu.

2. Idiphozithi yekhabhoni ngaphakathi kwemishini: Ngemva kokusetshenziswa isikhathi eside, izinto ezisele zingahlala kalula emgqonyeni, isikulufu, noma isikhunta, okuholela ekufakweni kwekhabhoni nasekwakhekeni kwemigqa emnyama.

Ukuhlanza okungaphelele ngesikhathi sokuphumula: Izinto ezisele emgqonyeni nesikulufu azihlanzwa ngokuphelele ngemuva kokusebenza kwangaphambilini. Lapho umshini uqalwa kabusha, le nto eyinsalela iba carbonize emazingeni okushisa aphezulu futhi ixubane nezinto ezintsha. Izilungiselelo ezingalungile zepharamitha yokukhiqiza: Amazinga okushisa e-Extrusion aphezulu kakhulu, adlula izinga lokushisa elishisayo lokuzinza kwempahla eluhlaza, okubangela ukushisa ngokweqile kanye ne-carbonization emgqonyeni.

Ukungafani kwesivinini se-screw nesilinganiso sokuphakelayo: Isivinini sokuphakela sihamba kancane kakhulu, kuyilapho isivinini sesikulufu sishesha kakhulu, okubangela okokusebenza ukuthi kuhlale emgqonyeni isikhathi eside kakhulu, okuholela ekonakaleni kokushisa kanye ne-carbonization.

3. Izingxenye Zokusebenza Ezigqokwayo noma Ezihlulekayo

Imfucumfucu yensimbi evela ezingxenyeni ezigugile noma ukungcola okwethulwa ngezigxivizo ezilimele nakho kungabangela imigqa emnyama.

I-Screw and Barrel Wear: Ngemva kokusetshenziswa isikhathi eside, igebe phakathi kwe-isikulufu nomgqomoukwanda, okwenza kube lula ukuthi impahla ibanjwe futhi ifakwe i-carbon esikhaleni. Impushana yensimbi ekhiqizwe ukugqokwa ingaxubana nempahla, yenze imigqa emnyama.

Izinkinga Zesikhunta: Idiphozithi yekhabhoni noma imihuzuko esiteshini sokugeleza kwesikhunta kungabangela ukuthi impahla ibanjwe futhi ifakwe ikhabhoni ngesikhathi sokugeleza. Izigxivizo zesikhunta ezilimele zingavumela ukungcola kwangaphandle ukuthi kungene kumzila wokugeleza.

I-Filter Clog noma Ukulimala: Izihlungi ezincibilikayo ezingashintshwanga isikhathi eside zingavaleka, okuholela ekugelezeni okungekuhle kwempahla kanye nokushisisa okweqile kwendawo kanye ne-carbonization. Izihlungi ezilimele zingavumela ukungcola ukuthi kungene esikhunjeni ngokuqondile. Kunconywa ukuhlola ngohlelo "lwezinto ezingavuthiwe → ukuhlanza imishini → ukuhlolwa kwezesekeli". Okokuqala shintsha inqwaba yezinto ezintsha zokusetshenziswa ukuze zihlolwe. Ngemva kokuqeda inkinga yezinto ezingavuthiwe, qaqa futhi uhlanze umgqomo, isikulufu kanye nesikhunta, futhi ekugcineni uhlole isimo sezesekeli ezifana nesikulufu nesihlungi.

Njengoba incibilika yepulasitiki idlula yonke inqubo yokudlulisa, ukucindezelwa, nokuncibilika ngaphakathiisikulufu, ngisho nokungapheleli okuncane kakhulu kungase kube indawo yokuzalanisa ama-black streaks. Ubulukhuni obungaphezulu obuvamile kuzikulufi ezivamile bukwenza kube lula ukuthi impahla ivaleleke ezikhaleni zentambo ngesikhathi sokuzungezisa ngesivinini esikhulu. Lokhu, kuhambisana nokushisa okuphindaphindiwe, kwakha imikhiqizo eshisiwe, ekugcineni kubangele ama-black streaks emkhiqizweni ophelile.

Ukukhetha izinto ezibonakalayo nakho kubalulekile. Izikulufu zethu zenziwe ngensimbi yekhwalithi ephezulu engu-38CrMoALA nitrided alloy. Lokhu kuthola ukwelashwa kokucisha kanye ne-nitriding izinsuku eziyisikhombisa, okuholela kungqimba oluwugqinsi lwe-nitrided olungu-0.50-0.70mm kanye nobulukhuni bobuso be-HV950-1050. Lezi zakhiwo ezibonakalayo ziqinisekisa ukumelana nokugqokwa okuhle kakhulu ngisho emazingeni okushisa angaba ngu-200°C, kunweba impilo yesevisi yesikulufu okungenani ngokukodwa kokuhlanu uma kuqhathaniswa nemikhiqizo evamile. Lokhu kuvimbela ukwakheka kwezinto emakhoneni afile ngenxa yokuguga okungaphezulu kokusetshenziswa isikhathi eside.

Ngokwenza imishini enembile, isikulufu sifinyelela ukuphakama kwebanga lesibuko lama-Ra0.4 microns, aphakeme izikhathi ezimbalwa kunezinga lemboni. Lokhu kuhumushela kumehluko wobude ongekho ngaphezu kwama-microns angu-0.4 ngemilimitha yobude obungaphezulu kwesikulufu, u-1/200 nje wobubanzi boboya bomuntu. Le ndawo ebushelelezi kakhulu inciphisa kakhulu ingcuphe yokugcinwa kwezinto futhi iqeda indlela yama-black streaks kwasekuqaleni.