Isihluzo seBronzi eSintered

Isihluzo seBronzi eSintered

Isihluzi seBronze eSintered Lungiselela iSilencer kunye neShishini lesihluzi, HENGKO Nikeza ngeSisombululo esona siSombululo kwiProjekthi yakho, Qhagamshelana nathi ngeenkcukacha ngoku

 

One-Stop OEM Supplier ofIsihluzo seBronzi eSinteredNgaphezulu kweminyaka engama-20+ eTshayina

 

NjengoMvelisi weSiko loBuchule beSintered Bronze Filter iminyaka engama-20+, HENGKO Gxila kwiindidi ezininzi Sintered

Isihluzo soBronzi kwayesintered isihluzo sentsimbi imveliso eTshayina.Xa kuthelekiswa nezinye iimathiriyeli zetsimbi,

ibronze ene-sinteredAmacebo okucoca aneenzuzo ezininzi, ezinje ngokuba nexabiso elivakalayo kuba zenziwe ngokungaphezulu

uqoqosho ekrwadaizixhobo. Yomelele, ilula ukuyigcina kwaye icocekile kwaye inobomi obude ukunqanda ukutshintshwa rhoqo.

 

I-HENGKO ngumvelisi owenziwe ngokwezifiso wezihluzi zebronze ezisikiweyo ezilungiselelwe ukusetyenziswa kolwelo kunye negesi.

Isihluzo sethu seSintered Bronze Filter Element sibonelela ngemithombo yeendaba ethembekileyo, eqinisekisiweyo, nehlala ixesha elide yokubamba amasuntswana afanelekileyo,

uthintelo lokuhamba, ukuvala, kunye noqhagamshelwano lolwelo.

Sinikezela ngeemilo ezahlukeneyo zezihluzi zobhedu ezi-sintered, ezineentlobo ezi-4 zezona zidumileyo:

1. Isihluzo seBronzi eSinteredIcwecwe 

2. Isihluzo seBronzi eSinteredUmbhobho

3. Isihluzo seBronzi eSintered Ipleyiti

4. Isihluzo seBronzi eSinteredIindebe

 

Ubuchwephesha be-HENGKO busenza ukuba sikwazi ukubonelela ngezisombululo ezilungiselelweyo ze-sintering kunye nezinto ezisemgangathweni zokucoca ubhedu.

Sisebenza ngokukhethekileyoOEMimveliso eyenzelwe ukutyeba kwakho, ukufikeleleka, kunye nobukhulu bepore.

Iinjineli zethu ziya kusebenza nawe ngokuthe ngqo, nakwii-odolo ezincinci. Ngemibuzo, qhagamshelana nathi namhlanje!

 

sintered bronze filter oem umenzi eTshayina

 

Yintoni i-OEM yeNkonzo ye-HENGKO enokubonelela ngayo

1.  OEM Naziphi na iiMilo: Idiskhi, indebe, iThubhu, iPhepha kunye nePleti ect

2.LungiselelaUbungakanani, Ubude, Ebanzi, OD, ID

3.CustomizedImingxumaukusuka 0.1μm - 120μm

4.LungiselelaUkutyeba

5. I-OEM Monolayer, i-Multilayer, iMixed Materials yoHluzo olwahlukileyo olufunekayo

6.I-CNC kunye ne-Welding engenamthungo kunye ne-304 ye-Stainless Steel Housing

 

Yabelana ngombono wakho wesihluzi seBronzi ye-OEM ngeHengKo namhlanje!

 

 

qhagamshelana nathi icone hengko

 

 

12Okulandelayo >>> Iphepha 1/2

 

Iimpawu zeSintered Bronze Filter:

1. Ukuchaneka okuphezulu kokucoca, ii-pores ezizinzile, kwaye akukho tshintsho kwisayizi ye-pore kunye nokutshintsha koxinzelelo.

Iyakwazi ukususa ngokufanelekileyo izinto eziqinileyo kunye namasuntswana, njl njl, ngokuchaneka okugqwesileyo kokucoca kunye nesiphumo esihle sokucoca.

2. Ukunyanzeliswa komoya okulungileyo kunye nokulahlekelwa kwengcinezelo encinci. Into yokucoca yenziwe ngokupheleleyo ngumgubo ongqukuva,

kunye ne-porosity ephezulu, iyunifomu kunye nobungakanani bepore egudileyo, ukuchasana okuphantsi kokuqala, ukuvuthela umva ngokulula, amandla okuvuselela amandla

kunye nobomi benkonzo ende.

3. Amandla omatshini aphezulu, ubulukhuni obuhle, iplastiki elungileyo, ukuxhathisa kwe-oxidation, ukumelana nokubola, akukho mfuneko yokongeziweyo.

ukhuseleko lwenkxaso ye-skeleton, ukufakwa okulula kunye nokusetyenziswa, ukulungiswa okufanelekileyo, indibano elungileyo,

kwaye inokudityaniswa, idityaniswe kwaye yenziwe ngoomatshini.

4. Iipore ezilinganayo, ezilungele ngakumbi iimeko ezifuna ukufana okuphezulu okufana nokuhanjiswa kwamanzi kunye

unyango lwe-homogenization.

5. Iimveliso ze-powder sintered ze-Copper zenziwe ngexesha elinye ngaphandle kokusika, izinga elisebenzayo lokusetyenziswa

imathiriyeli ekrwada iphezulu, kwaye imathiriyeli igcinwa ngowona mlinganiselo mkhulu.

Ngokukodwa kufanelekileyo kumacandelo aneebhetshi ezinkulu kunye nezakhiwo ezinzima.

6. Ukuchaneka kokucoca: 3 ~ 90μm.

 

ISintered Bronze Filter Application:

Usetyenziso oluphambili lwamacandelo ethu obhedu olunarhabula luquka:

*Ukucoca okuPhakathi: Iphucula umgangatho weoyile yokuthambisa, ioyile yamafutha, kunye nenkqubo yoxinzelelo lwamanzi.

*Umda wokuHamba: Ilawula ukuhamba kwiinkqubo ze-hydraulic ukwenzela ukusebenza kakuhle.

*Ukuthotywa koMoya ocinezelweyo: Iqinisekisa umoya oxinanisiweyo ococekileyo nocociweyo.

*UkuHlutywa kwe-Oli eKrwada yokugatywa kweSandi: Isusa ngokufanelekileyo isanti kunye nokungcola kwioli ekrwada.

*UkuFilwa kweNitrojeni kunye neHydrogen: Ibonelela ngezisombululo zokuhluza ezingenaso sulfure.

*UHluzo lweOxygen enyulu: Iqinisekisa amanqanaba aphezulu okucoceka kwizicelo zeoksijini.

*IsiZukulwana samaqamza: Iququzelela ukuhanjiswa kwerhasi okusebenzayo.

Jonga izisombululo zethu zokusebenza okuthembekileyo kuzo zonke iinkqubo zoshishino ezahlukeneyo!

 

 

Kutheni HENGKO Sintered Bronze Filtered

 

Singakwazi ukuhlangabezana ngqongqo njengoko iimfuno izicelo ezahlukeneyo, izihluzi sintered ubhedu kunye customizable kunye

uyilo oluyilayo. Sinezicelo zeeprojekthi ezininzi zokucoca, eziqhele ukusetyenziswa kuhluzo oluphezulu lwamashishini,

ukudambisa, i-sparging, ukhuseleko lwe-sensor probe, ukulawulwa koxinzelelo kunye nezinye izicelo ezininzi.

 

✔ Umenzi ophambili weisihluzo sobhedu esine-sinterediimveliso

✔ Iimveliso zoYilo oluLungisiweyo njengobungakanani obahlukeneyo, izixhobo, iileya kunye neemilo, iAperture

✔ ISO9001 kunye ne-CE yoLawulo loMgangatho olusemgangathweni

✔ Ngaphambi nasemva kokuthengisa Inkonzo evela kwiNjineli ngokuthe ngqo

✔ Amava apheleleyo oBuchwephesha kwizicelo ezahlukeneyo kwiMichiza, ukutya, kunye namashishini eSiselo.

      i-pneumatic silencer njl.

 

 

 

Ukusetyenziswa kweeMveliso zoHluzo lweBronzi ezineNceba

1. Ukwahlulwa kolwelo:ukuthanjiswa kwezibaso, Ulwelo lwesamente engumgubo ocolekileyo

2. IziXhobo zeExhaust:IiMufflers zokukhupha umoya, iiVenti zokuphefumla, iiMufflers zokulawula isantya

3. Ukusetyenziswa kwemichiza:Ukucocwa kwamanzi, ukuVeliswa kweeMveliso zeMichiza

4. Usetyenziso lwezoShishino:Izahlulo ze-Pneumatic Cylinder, iiMoto eziLungisiweyo kunye neeNdawo zeGearbox

5. Ishishini lezoThutho:Izahlulo eziSetyenzisiweyo kumzila kaloliwe, kwiZithuthi, kwiSikhitshane nakwiCandelo laseLwandle

 

 iSintered Bronze Filter Application 01

ISintered Bronze Filter Application 02

 

 

 

Izisombululo zobuNjineli

Kwiminyaka edlulileyo, i-HENGKO incede uninzi lweengxaki ezintsonkothileyo zokucoca kunye nolawulo lokuhamba kunye

fumana isisombululo esihle kwiindidi ezininziyeMichiza kunye neLebhu Isixhobo kunye neeProjekthi kwihlabathi liphela, ukuze wena

unokufumana iimveliso zethu zetsimbi zetsimbi ziba ziintlobo ezininzi. Sineqela leengcali

ukusombulula ubunjineli obuntsonkothileyo obulungiselelwe isicelo sakho.

 

Wamkelekile ekwabelaneni ngeProjekthi yakho kunye nomsebenzi kunye noHENGKO, siyakuNika iNgcweti yobuGcisa iSintered

Isisombululo sesihluzi sobheduNgeeProjekthi Zakho.

 

qhagamshelana nathi icone hengko

 

 

i-oem sintered bronze filter nayiphi na isayizi kunye nokumila

 

Uyenza njani i-OEM / Yenza ngokwezifiso Isihluzo soBronzi esiNyenziweyo

Xa iProjekthi yakho ineeMfuno eziKhethekileyo kunye nesidingo soHlelo oluPhezulu lweSintered Bronze Filters zinokufikelela,

Kodwa awukwazi ukufumana iimveliso zeFilter ezifanayo okanye ezifanayo, Wamkelekileukunxibelelana HENGKO ukusebenza kunye ukufumana i

esona sisombululo, kwaye nantsi inkqubo yeIzihluzi zeBronzi ze-OEM eziSintered,

 

Nceda ujonge uLuhlu lweNkqubo ye-OEM njengoko kungezantsi:

 

*Uthethwano: Fikelela kwi-HENGKO kwiingxoxo zokuqala.

*UPhuhliso ngokubambisana: Ukusebenzisana kwiimfuno zeprojekthi kunye nezisombululo.

*IsiVumelwano seKhontrakthi: Gqibezela kwaye usayine isivumelwano.

*Uyilo kunye noPhuhliso: Yenza kwaye usulungekise uyilo lwemveliso.

*Imvume yoMthengi: Fumana imvume yomthengi kuyilo kunye neenkcukacha.

*Ukwenziwa/Ukuveliswa kobuninzi: Qalisa ukuveliswa koyilo oluvunyiweyo.

*INdibano yeNkqubo: Hlanganisa amacandelo kwisistim yokugqibela.

*Uvavanyo kunye noLungiso: Yenza uvavanyo olungqongqo kunye nokulinganisa ukuqinisekiswa komgangatho.

*Ukuthumela ngenqanawa kunye noQeqesho: Hambisa imveliso yokugqibela kwaye unike uqeqesho oluyimfuneko.

 

Itshathi yeNkqubo yeSihluzo seBronzi ye-OEM eSintered

 

I-HENGKO izinikele ekuncedeni abantu baqonde, basulungekise kwaye basebenzise uMba ngokuFanelekileyo! Ukwenza Ubomi Bubesempilweni!

Sinomsebenzi kunye nelebhu ezininzi kunye neyunivesithi yaseTshayina nakwihlabathi liphela, njengeyunivesithi yaseColumbia, KFUPM,

IYunivesithi yaseCalifornia, iLINCOLN kwiYunivesithi yaseLincoln

Iqabane leSintered Bronze Filter kunye neHENGKO Filter

 

i-oem sintered ikomityi yobhedu yokucoca nayiphi na isayizi kunye nokumila

 

Iimpawu eziphambili kunye ne-Advanteji yeSintered Bronze Filters

I-HENGKO igxile kwi-sintered porous melt filter ngaphezulu kweminyaka engama-20 kwaye sinomgangatho wokuqala, ke sihlala sibonelela ngokuphezulu.

umgangatho sintered ubhedu lokucoca, engundoqo babe sintered iidiski zobhedu, kwaye sinterediityhubhu zobhedu, izihluzi zepleyiti yobhedu ene-sintered

Zonke zinokuthenjwaukusebenza kwe-anti-corrosion, ubushushu obuphezulu,kunye nosetyenziso oluchanekileyo oluphezulu.

 

1. I-Uniform Porosity:I-Micron Rating ye-1-120um kunye ne-99.9% yokuHluma ngokuSebenzayo

2. Amandla aphezulu:Ubuncinci boButyenene obuyi-1 mm, bube yi-100mm max. : Amandla omatshini aPhezulu kunye nokuLahla koxinzelelo oluphantsi

3. Ukunyamezela Ubushushu obuPhezulu :Akukho Nakuphi na ukuthotywa okanye ukuthotywa naphantsi kwe-200℃

4. Ukumelana neeKhemikhali: UngaHlufa kwiiFluids eziNyolayo, iintlobo ngeentlobo zeegesi, kunye neeFuel

5. Easy Welding: I-Resistance Welding, iTin Welding, kunye ne-Arch welding

6. Easy Machining: Umatshini oLula njengokuJika, ukugaya, uKwemba

7.Ubomi obude kunye nokuCoca ngokulula :Isakhiwo sokucoca ubhedu seSintered sizinzile kakhulu, Kulula ukusicoca kwaye sinokusetyenziswa ngokuphindaphindiweyo

 

NdiyacelaSithumele ukubuzamalunga neemfuno zakho zenkcukacha zesihluzo sobhedu esinabileyo, esifana nesimbo, ubungakanani, uYilo olubonakalayo ect.

Phawula:I-HENGKO ipakisha izihluzi zetsimbi zentsimbi kwibhokisi nganye yephepha ukunqanda umonakalo okanye imikrwelo.

 

IFaq yeSintered Bronze Filter

 

Isikhokelo esipheleleyo se-FAQ yeSintered Brass Filters kunye neSicelo

 

Yintoni iSintered Bronze Filter?

Isihluzo sobhedu esine-sintered, ekwaziwa njenge-sintered bras filter, isihluzo sobhedu esidityanisiweyo, isihluzo sobhedu esidityanisiweyo, sisixhobo sokuhluza.

kunye nokumelana nokushisa okuphezulu, ukunyanzeliswa koxinzelelo kunye neempawu ezizinzileyo zokungena. Yenziwe ngobuninzi

amasuntswana obhedu olungqukuva atshizwe ngumgubo wesinyithi.

Inkqubo ye-sintering elawulwa ngokuqinileyo yenza ukuba i-HENGKO sintered izihluzo zobhedu zivelise ubungakanani obufanayo bepore kunye

ukuhanjiswa ukusuka kwi-0.1 ukuya kwi-100 microns. Ngenxa yoko, izihluzi ze-HENGKO sintered brass zibonelela ngokugqwesa komoya

kunye ne-porosity ephezulu.

 

Sicoca Njani Isihluzo seBronzi eSintered?

1. Ukucoca okuqhelekileyo:

Sebenzisa i-HENGKO bronze sintered filtered filter ngaphakathi koxinzelelo oluphezulu, emva koko usebenzise umoya woxinzelelo oluphezulu uwugungxule ngendlela efanayo.

Phinda oku 3-4 amaxesha, emva koko ungafumana isihluzo sobhedu esine-sintered njengokuthenga okutsha.

2. Ukucoca ngeUltrasonic:

Le ndlela ilula kwaye iyasebenza, Okokuqala beka iHENGKO sintered isihluzo sobhedu kwisicoci se-ultrasonic, emva koko ulinde kwaye uyikhuphe.

emva kwesiqingatha seyure.

3. Ukucocwa kwesisombululo:

Thatha isihluzo sobhedu se-HENGKO sintered diphu kulwelo lokucoca, kwaye iLiquid iya kusabela ngokwekhemikhali ngongcoliseko lwangaphakathi,

kwakhona khangela nje kwaye ulinde malunga neyure enye, ukujonga ukuba isihluzo sobhedu sintered sicocekile, le ndlela iyakuncedawena ngokukhawuleza

susa amasuntswana.

 

Yeyiphi eyona Element yesihluzo seMicron esiQhelekileyo esiSetyenziswa kakhulu?

I50 yemicron yobhedu yokucoca isihluzo esidumileyo sobungakanani bepore, abathengi abasetyenziswa kakhulu

amasuntswana oyile ahlukeneyo kwipcv/ccv air usebenzisa i50 micron bronze filter. ukuba u

Kananjalo unesidingo seprojekthi sokusebenzisa izihluzi ze-micron ezingama-50, unako

khangela iinkcukacha zekhonkco50 micron.

 

Usenza Njani ISintered Bronze Filter?

Ukwenza iSintered Bronze Filtered Phantse iyafana ne sintered steel stainless filter,

ungajongaYintoni iSintered Metal Filter

 

Zeziphi iiMpawu zeSintered Bronze Filter?

Iimpawu eziphambili zeSintered Bronze Filter iphantse yafana

izihluzi zentsimbi engenasici, zinezininziinzuzo;

1. Ulwakhiwo olomeleleyo, akukho lula ukwaphuka,

2.. Kulula ukucocakwaye ingaphinda isetyenziswe.

3. Iindleko zingcono kunezihluzo zensimbi ezingenasici.

 

Emva koko kufuneka wazi ezinyeukusilela :

1. Ubomi buya kuba bufutshane kunezinye izihluzi zetsimbi.

2. Ayikwazi ukuthwala uxinzelelo oluphezulu kunye nobushushu obuphezulu, kwakhona Kulula ukusabela ngemichiza

kunye nolunye ulwelo kunye neegesi, ngoko sicebisa ukuqinisekisa ukuba ulwelo okanye igesi yakho ilungile

ukusebenza ngobhedu.

 

Ngaba Kulula Ukucoca Isihluzo soBronzi esiSintered?

Ewe, kulula ukuyicoca, eyona nto iphambili ukusebenzisa i-backflush njl

 

Ungasikhetha njani iSintered Bronze Filter Element yeprojekthi yakho?

1. Yazi ukuba yintoni injongo yakho yokuhluza ulwelo lwakho okanye irhasi, yintoni ubukhulu bepore oyifunayo

ukusebenzisa ukucoca.

2. ukuba uvavanyo lwakho lwegesi okanye izinto ezingamanzi zisebenza ngobhedu.

3. luhlobo luni loyilo lwecebo lokucoca ubhedu lwesixhobo sakho

4. yintoni ubungakanani besihluzo sakho sobhedu

5. Uxinzelelo olungakanani Usebenzisa uxinzelelo oluphezulu kwisihluzi ngexesha lenkqubo yokucoca?

ungaqinisekisa nathi, okanye ukuba ufuna ukongeza uxinzelelo oluphezulu, siya kucebisa ukuba sisebenziseyenziwe ngentsimbi eshayinayo

izihluzi sintered.

6. Uceba ukufaka njani iSintered Bronze Filter kwisixhobo sakho sokuhluza.

 

Zeziphi izinto eziluncedo ngesiSintered Bronze Filter?

Uncedo oluphambili lwezihluzo zobhedu ezisikiweyo ngolu hlobo lulandelayo:

1. Isakhiwo esinamandla , akukho lula ukuphuka

2 .. Kulula ukuyicoca kwaye inokusetyenziswa ngokuphindaphindiweyo.

3. Iindleko zingcono kunezihluzo zensimbi ezingenasici.

 

Eminye imibuzo eyongeziweyo kwizihluzo zeBronzi, nceda uzive ukhululekile ukuqhagamshelana nathi.

1. Yintoni iNgcaciso yokuHluma kweSintered Bronze Filter?
Izihluzi zebronze ezinabileyo zihlala zibonelela ngokusulungekileyo okuphezulu, zisusa ngokufanelekileyo amasuntswana ukusuka kwimicrons ukuya kwi-sub-microns, kuxhomekeke kubungakanani bepore yesihluzi.

2. Ziziphi iiNkqubo zeSintered Bronze Filter?
Izihluzi ze-bronze ze-Sintered zisetyenziswa kwizicelo ezahlukeneyo, kubandakanya ukusetyenzwa kwe-oyile kunye negesi, ukucocwa kwamanzi, ukusetyenzwa kweekhemikhali, kunye neenkqubo zokucoca umoya.

3. Zeziphi iisayizi zeSintered Bronze Filter?
Izihluzi zebronze ezisiyiweyo ziza ngobukhulu obahlukeneyo, ukusuka kwiidiski ezincinci kunye neekhatriji ukuya kwiifomu ezinkulu zecylindrical, ezinokwenziwa ukuze zilingane neemfuno zesicelo.

4. Ingaba lukhona unyino lweSintered Bronze Filter?
Ngelixa izihluzi zebronze ezifakwe kwi-sintered zomelele, zisenokuba lula ekudlekeni kwindawo ezineasidi eninzi kwaye zinokuba nemida kwizicelo zobushushu obugqithisileyo.

5. Yintoni iNgqwalasela yoYilo lweSintered Bronze Filter?
Iingqwalasela eziphambili zoyilo ziquka ubungakanani bepore, izinga lokuhamba kokucoca, ukuhambelana kwezinto eziphathekayo, kunye neemeko ezithile zokusebenza zesicelo esicetywayo.

6. Ngaba kukho uMahluko phakathi kweSintered Bronze Filter kunye neBronzing Powder Filter?
Ewe, izihluzi zebronzi ezidityanisiweyo zenziwe ngomgubo oxutyiweyo wobhedu, ngelixa izihluzi zomgubo webronzing zisebenzisa indlela eyahlukileyo yokuhluza, egxile ekubanjweni kwamasuntswana endaweni yolwelo lokuhluza.

7. Yeyiphi iMigangatho yoMgangatho weSintered Bronze Filter?
Izihluzo zebronzi ezifakwe kwi-Sintered kufuneka zihambelane nemigangatho yoshishino efana ne-ISO 9001 yolawulo lomgangatho kwaye zinokuhlangabezana nemigangatho ethile enxulumene nokusebenza kakuhle kohluzo kunye nokhuseleko lwempahla.

8. Yintoni eyenza iSintered Metal Filters Yahluke?
Izihluzi zetsimbi zetsimbi zibonelela ngeenzuzo ezizodwa ezifana nokuzinza okuphezulu kwe-thermal kunye nomatshini, ukusebenziseka kwakhona, kunye nokukwazi ukumelana neemeko ezingqongileyo ezinzima, ezizenza zilungele izicelo ezibango.

9. Yintoni umahluko phakathi kweSintered Stainless Steel Filter Thelekisa neSintered Bronze Filter?
Izihluzi zetsimbi ye-Sintered stainless steel zibonelela ngamandla okumelana nomhlwa kunye nokomelela okuphezulu xa kuthelekiswa nezihluzo zobhedu ezisiniweyo, zizenza zifaneleke ngakumbi kwindawo ezinobundlobongela.

10. Ziziphi iiNzuzo zeSintered Bronze Cartridge Filters?
Izihluzi zekhatriji ze-bronze ze-Sintered zibonelela ngokugqwesileyo kokucoca, ukuqina, kunye nokulula ukugcinwa, zizenze zibe lukhetho olungabizi kakhulu kwizicelo ezahlukeneyo zemizi-mveliso.

 

Kufuneka usibuyisele nini iSintered Bronze Filter?

Ngokuqhelekileyo, emva kokusetyenziswa ngaphezu kweminyaka eyi-1-2, isihluzo sobhedu siya kutshintsha umbala ube yinto emnyama.

uloyiko, yioksidi nje eyenziwe kwi-oxidation yobhedu ngomoya.

Emva koko Kufuneka ucinge ukuyitshintsha enye xa isihluzo sifuna ukongeza uxinzelelo, okanye uHluzo lucotha

kunangaphambili.

 

Usenemibuzo kwaye uthanda ukwazi iinkcukacha ezithe vetshe kwiIsihluzo seBronzi eSintered, Nceda uzive ukhululekile ukuQhagamshelana nathi ngoku.

Kwakhona UnakoSithumele i-imeyileNgqo Ngokulandelayo:ka@hengko.com

Siza kuthumela umva ngeeyure ezingama-24, enkosi ngesigulana sakho!

 

 

 

Thumela umyalezo wakho kuthi:

Bhala umyalezo wakho apha kwaye uwuthumele kuthi