Okuyisisekelo Ukukhetha Izingxenye ze-Sandblasting

Isihlabathi kwakuyi-abrasive evame ukusetshenziswa kule nqubo, yingakho igama elithi sandblasting. Eminyakeni engu-50 edlule, izinto ezengeziwe ziguqulelwe inqubo yokuhlanza izinto.

Namuhla, amagama athi ukuqhunyiswa kwemidiya kanye nokuhlanza ukuqhuma okulimazayo kuyichaza ngokunembe kakhudlwana le nqubo, njengoba izinto eziqhumayo zingafaka noma iyiphi inombolo yemikhiqizo, efana ne-coal slag, i-garnet, ubuhlalu bengilazi, amagobolondo e-walnut, nezikhwebu zombila.

Ukuqhuma kwemidiya kungasetshenziswa cishe kuzo zonke izingxenye zikagandaganda, uma kubhekwa ingxube efanele yempahla yemidiya, umfutho womoya, ivolumu, kanye nombhobho wokuqhuma.

Okulandelayo ezinye zezisekelo uma kuziwa ekukhetheni izingxenye.

I-Compressor
I-compressor yomoya iyisici esibaluleke kakhulu senqubo ye-sandblasting. Ihlinzeka ngevolumu yomoya kanye nokucindezela ukuhambisa imidiya elimazayo nakuba ipayipi nebhobho yokuqhuma inesivinini esanele sokususa isikali, ukugqwala, noma ama-coating amadala endaweni eqondiwe.

Ngokuqhunyiswa kwekhabhinethi, ama-cubic feet ama-3 ukuya kwangu-5 ngomzuzu (cfm) angase anele, usho kanje. Emisebenzini emikhulu, uhla lwama-25 kuya ku-250 cfm lungase ludingeke.

Lapho ukhetha ibhodwe eliqhumayo noma ikhabethe, kunezinhlobo ezimbili ongakhetha kuzo: okuphakelayo okumuncwa kanye nokudla kokucindezela.

Okuphakelayo Systems
Amasistimu we-suction-feed asebenza ngokuphonsa ama-abrasives ngqo kusibhamu esiqhumayo. Lokhu kuncike emoyeni we-compressor ofakwe kusibhamu sokuqhuma ukuze kwakheke i-vacuum. Lapho isibhamu sicushiwe, i-abrasive imuncwa kulayini wokuphakelayo kusibhamu sokuqhuma. Umoya ophunyukayo ube usuthwala into elimazayo uyiyise endaweni okuhlosiwe.

Ngokuphambene, amasistimu okuphakela ingcindezi agcina okuhugayo esitsheni noma ebhodweni. Ibhodwe lisebenza ngomfutho olingana nowepayipi lempahla. Ivalvu yokulawula ebekwe phansi ebhodweni ilinganisa ukuhuzuka kube umfudlana womoya onesivinini esikhulu. I-air stream ibe isithwala i-abrasive ngepayipi lokuqhuma ikuyise endaweni yokusebenza.

I-blast nozzle iyisisetshenziswa esisetshenziselwa ukukhulisa isivinini somthelela we-sandblasting abrasive. Nakuba kunezinhlobo eziningana ezahlukene zamabhobhothi, kunezine ezivamile.

* Umbhobho obhorekile oqondile wenza iphethini eqinile yokuhlanza indawo noma ukuqhuma kwekhabhinethi. Ngokuvamile isetshenziselwa ukuhlanza izingxenye ezincane.

* I-venturi nozzle iyisinqumo esingcono kakhulu sokuhlanzwa kokukhiqiza okuphezulu kwezindawo ezinkulu. Kubalulekile ukuqaphela, nokho, ukuthi lapho uqhunyiswa ngomfutho ophezulu (100 psi noma ngaphezulu), ama-abrasives angafinyelela isivinini esingaphezu kuka-500 mph.

* I-double-venturi blast nozzle ingacatshangwa njengamabhomu amabili abekwe ekugcineni kuya ekugcineni. Izimbobo zokungenisa umoya emzimbeni wombhobho zivumela umoya we-compressor ukuthi uhlangane nomoya womkhathi. Lesi senzo se-venturi sandisa i-cfm futhi sandisa nosayizi wephethini yokuqhuma. U-Deardorff uphawula ukuthi i-double-venturi nozzle iyisinqumo esingcono kakhulu sokuhlanza ingcindezi ephansi. Lokhu kungenxa yokuthi isenzo sokumunca sezimbobo zokungenisa umoya sinamandla okuthwala inani elikhulu lama-abrasives asindayo, aminyene ngepayipi lempahla ngengcindezi ephansi.

* Umbhobho wefeni ukhiqiza iphethini yefeni esetshenziselwa ukuqhuma izindawo ezinkulu eziyisicaba. I-fan nozzle idinga ivolumu yomoya ye-cfm eyengeziwe ukuze isebenze.

Ama-nozzles ayatholakala futhi ngokukhethwa kwezinto zokwenziwa kolwelwesi, okuhlanganisa i-aluminium, i-tungsten carbide, i-silicon carbide, ne-boron carbide. Ngokwemvelo, ukukhetha kuncike kubhajethi yakho kanye nobunzima bomsebenzi. Vele ukhumbule ukuthi ukusetshenziswa kwemidiya kukhuphuka ngokugqokwa kwe-nozzle.

Konke Mayelana ne-Abrasives
Izinto ezithinta ukusebenza kwe-abrasive zihlanganisa okulandelayo.

* Ukuqina kwenhlabathi, ukugqwala, noma ama-coatings amadala azosuswa.

* Ukwakheka kwendawo nokuzwela.

* Izinga lokuhlanza elidingekayo.

* Uhlobo lwe-abrasive.

* Izindleko kanye nezindleko zokulahla.

* Amandla okusebenzisa kabusha.

I-abrasive ingxenye yanoma iyiphi inqubo yokuqhuma eyenza umsebenzi wokuhlanza. Kunezigaba ezine ezinkulu zezinto ezilumayo.

* Ama-abrasives emvelo ahlanganisa isihlabathi se-silica, izihlabathi zamaminerali, i-garnet, ne-specular hematite. Lawa athathwa njengama-abrasives asebenzisekayo futhi asetshenziselwa ikakhulukazi ukuqhumisa ngaphandle.

* Ama-abrasive enziwe umuntu noma akhiqiziwe, afana nobuhlalu bengilazi, i-aluminium oxide, i-silicon carbide, i-steel shot, nemidiya yepulasitiki, zingasetshenziswa kabusha futhi zingasetshenziswa ezinhlelweni ezivumela ukutholwa kanye nokugaywa kabusha.

* Ama-abrasives akhiqizwa ngumkhiqizo - njenge-slag yamalahle, ewumkhiqizo wezitshalo zamandla kagesi ngamalahle - athathwa njenge-abrasive esetshenziswa kakhulu ngemuva kwesihlabathi se-silica.

* Ama-abrasive angewona awensimbi ngokuvamile ahlukaniswa njengezinto eziphilayo. Lokhu kufaka phakathi ubuhlalu bengilazi, imidiya yepulasitiki, nezinhlobo zokusanhlamvu ezifana nama-corncobs, isitashi sikakolweni, amagobolondo e-pecan, amagobolondo kakhukhunathi, namagobolondo e-walnut. Ama-abrasives we-organic asetshenziswa uma kudingeka umonakalo omncane wendawo.

Isimo Nokuqina
Okunye okucatshangelwayo lapho ukhetha i-abrasive isimo somzimba nobulukhuni.

"Ukuma kwe-abrasive kuzonquma ikhwalithi nesivinini senqubo yokuqhuma," kuphawula u-Deardorff. "Ama-abrasives angama-angular, acijile, noma anomumo ongajwayelekile azohlanza ngokushesha futhi agcizelele indawo okuqondiswe kuyo. Ama-abrasive ayindilinga noma ayindilinga azohlanza izingxenye ngaphandle kokukhipha amanani eqile ezinto eziyisisekelo."

Ubulukhuni, okwamanje, akuthinti nje isivinini lapho ihlanza khona, kodwa futhi nenani lothuli olukhiqizwayo kanye nezinga lokuqhekeka, elibuye libe nomthelela oqondile emandleni okuvuselela kabusha.

Ukuqina kwe-abrasive kuhlukaniswa ngesilinganiso se-Mohs - ukuphakama kwenombolo ukusuka ku-1 (talc) kuya ku-10 (idayimane), umkhiqizo unzima kakhulu.

Uma unentshisekelo ku-Abrasive Blast Nozzle futhi ufuna ulwazi olwengeziwe nemininingwane, UNGATHI XHUMANA NATHI ngocingo noma ngemeyili kwesokunxele, noma SITHUMELE IMEYILI ezansi kwekhasi.