Ukuhlela Ukuphepha Kwe-Polyurethane (Shore A/D) Ngokwesilinganiso Sasezinye Izinkulungwane Zokugqibela

Shore A vs Shore D: Ukuxoxa kwezinkulu zokukhetha iskeli ukusobala isebenzo sezinto ne-mechanism yokuhlukana

Imiscale yokubala ukuphakamisa kwe-Shore ibala ubukhulu bekuphakamisa kwe-polyurethane (PU)—i-Shore A yasezinye izinkulungwane ezincane (0A–100A), i-Shore D yasezinye izinkulungwane ezingaphansi nezinkulungwane ezingabi ngekhanda (0D–100D). I-Shore A isebenzisa indenter engu-sphere, futhi ngakho iyisifundo esihle kakhulu kwezinqumo zokusebenza ngokudlula njengezinkulungwane zokugcina nezinkulungwane zokuvimbela ukuchitha, apho ubukhulu bakuphakamisa kubhekiselela ukungabi ngekhanda ukuze kungavunyelwe ukusuka kwemithombo phakathi kokusebenza okuphakathi. I-Shore D isebenzisa indenter engu-needle engekhanda, futhi ibeka ubukhulu bakuphakamisa ngokucacileyo kwezinqumo zokusebenza kwezinkulungwane zokugcina—njengezinkulungwane zokugcina ukugcina nokugcina kwezinkulungwane zokugcina—ezinokuzimela ukugcina okuphakathi kwezinkulungwane zokugcina.

Ukulinganisa okuphambili kuyisibonelo sokubalwa kwezinkulungwane zokugcina: ukugcina ngokudlula (njengezinkulungwane zokugcina kwe-conveyor idler) kubhekiselela ku-Shore A (85A–95A) ukusukela kwezinkulungwane zokugcina zokudlula okuhle kakhulu ukusukela kwezinkulungwane zokugcina; ukugcina ngokugcina okuphakathi kwezinkulungwane zokugcina (njengezinkulungwane zokugcina kwe-crusher feeds) kubhekiselela ku-Shore D (65D+) ukusukela kwezinkulungwane zokugcina zokugcina okuphakathi kwezinkulungwane zokugcina.

Ukukhetha okungafanani kusenza ukungafanele kushisa—i-Shore A ephezulu kwezindawo zokuphuma kubangela ukuguqulwa kwezinyathelo; i-Shore D eyisikhwama kwezindlela zokuflex kubangela ukugqibela okwesibindi. Izindlela zokusebenza kweminingi ziyavumela lokhu: izipaneli zesikrini se-PU eziyisikhathi se-90A zazisobala ukuthi zizokwenzela ukuthi zilindele amasiko okuzimela ngokuphakeme kwe-47% kulokho kwezinye izinto ezinamandla kakhulu. Ukulandela kahle kwezinhlobo zokusebenza—kanye nokuthi yini okuyisibonelo sokugcina (ukuslide noma ukuphuma)—kuyisibopho sokuvumela i-PU ekhuselekile kwezinkinga zokugcina.

Ukuxhuma phakathi kwezinhlobo zokugcina nezinhlobo zokugcina: Kungani ukuthi izinhlobo zokugcina zesi-PU azifanele ngokuphelele?

Isivinini esingaphansi kwezinhlobo: Sizinga kahle ukuthi i-85A–95A isebenza kahle ukuthi isobale ukugcina ngokuslide ngaphandle kokugqibela okwesibindi

Ngaphandle kokuthi kubangelwa ngokuthi kungafanele, ukugcina kwe-polyurethane (PU) kuphakeme kwi-85A–95A—akuphakeme ngokuphelele. Ngaphezu kwalokho kuhlelwa, ukuthi kungabonakali kakhulu kubangela ukugqibela okwesibindi ngokuchitha noma ngokuchitha kwezinye izinyathelo. Amaphayela emisebenzi ayavuma:

• i-PU ye-95A iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuthi iyasobala ukuth......
• Kusukela ku-100A+, izihlangothi zemicro zihamba kakhulu ngokuphakanyiswa kwe-40% ngesikhathi sesheer stress

Lolu bhalansi be-Goldilocks lubalansisa ukuzimela nokuthintana, kubangela ukuthi kuthathelwe imvelo futhi kungabikho ukugqibela kwesifunda.

Ukubonakala kokuchitha: 75A vs 90A kusukela kwe-iron ore screening — ubudlelwane obude kakhulu ngokuphakanyiswa kwe-3.2×, akunye nje ukuthintana kakhulu

Ukuzimela kwe-75A ne-90A PU screen panels kusukela kwe-iron ore processing kubonisa:

Izihlangothi ze-90A zazide kakhulu ngokuphakanyiswa kwe-3.2×—akunye nje ngoba zayithintana kakhulu, kodwa ngoba ukuthintana kwazo kuyavumela ukuthi kubhekiswe kwezinhlobo zokugqibela ezinkulu. Abahleli bakwakha ubudlelwane ngokuphakanyiswa kwe-47% futhi ngokuzimela i-92A kwezindawo zokuphakanyiswa kakhulu.

Izifundo ze-Polyurethane ezingenziwe ngokuhambisana: Ukubalansisa ukuthintana kwe-Shore A/D ngaphandle kokuchitha ukuzimela nokuthintana kwezinkinga zokushaya kwezinkinga zokushaya

Ukulinganisa kwe-polyol–isocyanate kunye nokulungiselela kwe-chain extender: Ukulungiselela ngokuphelele ukuthintana ngaphandle kokuchitha ukuthatha isibindi sokugqibela

Ukuhlanganisa kwe-PU okuphelele kubhekwa ngokuzimela—akabhekwa ngokwenzeka kuphela—ngokusebenzisa ukuchaza kwe-polymer. Isilinganiso se-polyol ku-isocyanate sibhekisa ubukhulu be-crosslink: ukuningi kwe-isocyanate kongeza ubukhulu be-Shore A/D kodwa kungase kubangela ukuthi ipolymere ibe yinkonzo. Amapholymere angaphezulu amadala kakhulu akhuthaza ukuthi ipolymere ibe yinkonzo emiphakathini engaphezulu. Amachain extenders njenge-ethylene glycol noma butanediol abhekisa njengezikhala zomkhakha, kusiza ukuthi kwenziwe ukulungisa kahle kwe-Shore kusukela ku-60A ku-75D ngaphandle kokugwema ukuthi ipolymere ibe yinkonzo. Ngaphandle kokubhekwa kwezinhlelo ezingenabizo—lapho ukuvamisa kwe-Shore D ngemizuzwana ezishumi kuyisithembiso sokugwema ukuthi ipolymere ibe yinkonzo ngemizuzwana ezintathu—abasika abaqinisekileyo bakhuthaza ukuthi ubukhulu be-tensile bube ngaphezulu kwe-25 MPa nakho lapho kubekwe ku-70D. Lokhu kuhlinzeka ubukhulu be-toughness emilayeni yezihlangu zokushisa nezinye izinto ezinokuthi zibe yinkonzo, futhi kusiza ukuthi ipolymere ibe yinkonzo emaphoyinti e-iron ore, lapho ukuthi ipolymere ibe yinkonzo nokuthi ipolymere ibe yinkonzo kwezihlangu zokushisa nezinye izinto ezinokuthi zibe yinkonzo kuyahlukahluka.

Ukulungisa Ubukhulu Be-Hardness Ngokwesikhundla: Kusukela Ku-Screen Panels Ku-Chute Liners Noma Ku-Impact Plates

Isifundo Sesikole Se-Mining: I-Screen Panels Ezingaphezulu Kwe-92A Zihlanza Ukuthi Kube Yinkonzo Futhi Zihlukanisa Umkhathi Wokusebenza Ngemizuzwana Ezine-ama-47%

Kukhuphuka kwemithi yamaphakathi, izipaneli zase-urethane zase-92A zazisika isikhathi sokusebenza ngokuphakeme kwe-47% kulokho kwezinye izinto ezisebenzayo. Le gradi yase-Shore A yayisikha ubukhulu bokugqibela nokuthanda ukubuka kwezinkambu. Ukubhlindeka kwesipaneli kushukuma ngokuphakeme kwe-30% ngokuthi amakhilomu ayadlula ngokungafani, okwakwakha ngqo umsindo wamakhilomu nokuthuthukisa kwawo. Ukukhetha kahle ukuphakama kwe-polyurethane kusikha amasiko okuzimisa nokuthatha izipaneli ezintsha.

Isibonelo sokusebenzisa amakhilomu ngokukhulu: Izilineri zase-65D zisobala kakhulu kwezilineri zase-95A kumaphakathi aphakamileyo kwezinkambu.

Kumaphakathi okuhambisa amakhilomu we-granite, izilineri zase-65D zasobala ngokuphakeme kwe-3.2× kunezilineri zase-95A kumaphakathi aphakamileyo kwezinkambu. Ukuphakama kwe-Shore D kusikha ukuthi kuyabuka ngokuphelele—kukhathazela imininingwane yamandla ekhulula kwezinkambu ezingaphakamile ngokuphakeme kwe-90 m/s ngaphandle kokuthi kubhakelwe ngokuphakeme. Kumaphakathi aphakamileyo okuhambisa, ukuvalelwa okungavunyelwe kwashukuma ngokuphakeme kwe-60%. Ukukhetha kahle ukuphakama kusikha ukuthanda ukubuka kwezinkambu—ngaphandle kokuthi kubhakelwe ngokuphakeme. kanti ukuthanda ukubuka—ngaphandle kokuthi kubhakelwe ngokuphakeme.

Imibuzo Evame Ukubuzwa

Yikuphi umph difference phakathi kwezivinini zase-Shore A nezivinini zase-Shore D?
Shore A isibalo sokuphepha kwezinkqubo ezincane, ngakho-ke Shore D isebenzisa izinkqubo ezingaphansi nezinkqubo ezingabi ngenani.

Kungani ukuphepha kubalulekile ekukhetheni amakhemikhali ase-polyurethane?
Ukuphepha kubandaka ubukhulu bekho lokugcinwa kwesikhundla, ukugcina nokuthwasa, okuyisisekelo sokusebenza kwezinye izindawo.

Ingaba inkqubo ingabili ngenani?
Yebo, uma inkqubo ibili ngenani, ingaba yilokunqanqana futhi iyakwazi ukugcina noma ukufihla ngokuzimisa.