Ubushinwa Sodium Silicate Sand Casting Manufacturer 

Sodium silike umucanga, bizwi cyane mu nganda nkibikorwa bya CO2 cyangwa guta ibirahuri byamazi, nubuhanga kabuhariwe bwo gukora ibyuma bifashisha sodium silicat binder ikomezwa na gaze ya gaze karuboni. Ubu buryo butanga inyungu zinyuranye zo gukora ibyuma biciriritse-binini binini hamwe nicyuma hamwe na geometrike igoye, bitanga umutekano muke ugereranije nuburyo gakondo bwumucanga wicyatsi mugihe hagumaho ibikoresho bike ugereranije nibikorwa. Nkumushinga wambere wambere mubushinwa sodium silicike yumucanga wumucanga, dukoresha ubu buryo bwikoranabuhanga kugirango dutange ibice bisobanutse neza kumashini ziremereye, imibiri ya valve, nibice byubatswe, bituma habaho uburinganire bwiza hagati yubuziranenge bwubuso, umusaruro, hamwe nigiciro cyinshi mugutanga amasoko ya B2B kwisi yose.

Sodium Silicate Yumusenyi Niki?

Sodium silicate sand sanding ni igice cyumucanga wumucanga wa chimique aho umukozi uhuza ari igisubizo cyamazi ya sodium silike (Na₂O · nSiO₂), bakunze kwita ikirahuri cyamazi. Bitandukanye n'umucanga wicyatsi kibisi, ushingiye kubumba nubushuhe, cyangwa gusiga umucanga wumusenyi, ukoresha imashini ihuza ibinyabuzima, ubu buryo bukoresha imashini idasanzwe ikomera vuba iyo ihuye na gaze karuboni (CO2) cyangwa ikoresheje uburyo bwo kwikomeretsa burimo est est.

Ihame ryibanze ririmo kuvanga umucanga wa silika na 3-6% ya sodium silikatike. Iyo ifu cyangwa intoki bimaze gukorwa, gaze ya CO2 ihita inyuzwa mumusenyi. Dioxyde de carbone ifata hamwe na sodium ya sodium kugirango ikore gelic acide silicic na sodium karubone, ikora imiterere ikomeye hafi ako kanya. Uku gukomera byihuse bituma habaho guterana no gusuka, bigabanya cyane ibihe byizunguruka kubikorwa byihariye.

Imashini ya Shimi Inyuma Yibikorwa

Gusobanukirwa chimie ningirakamaro mubikorwa bya injeniyeri. Igisubizo kirashobora koroshya ibi bikurikira:

• Kuvanga: Umucanga wa Silica ushyizwe hamwe na sodium ya sodium.
• Gassing: Gazi ya CO2 yinjira mu mucanga.
• Igisubizo: Na₂SiO₃ + CO₂ + H₂O → SiO₂ · nH₂O (Gel) + Na₂CO₃.
• Gukomera: Gel ya acide silicike ikora nkikiraro cyibanze gihuza ibinyampeke, bitanga imbaraga zicyatsi kibisi nimbaraga zumye zihagije kubintu byashongeshejwe.

Iyi miterere idahwitse isobanura ko inzira itanga umusaruro muke (VOCs) mugihe cyo gusuka, bigatuma ibidukikije byangiza ibidukikije muburyo bumwe na bumwe bushingiye kuri resin, nubwo kunyeganyega no gutunganya umucanga byerekana ibibazo byabo.

Kuki Hitamo Sodium Silicate Sand Casting?

Ku bashinzwe amasoko naba injeniyeri bakomoka mu Bushinwa, guhitamo inzira nziza yo gutora ni icyemezo cyibikorwa. Sodium silicate casting ifite umwanya wihariye hagati yumucanga wicyatsi uhendutse n'umucanga wa resin wuzuye. Agaciro kayo gashingiye muburyo butandukanye bwo gukora ibicuruzwa bito n'ibiciriritse.

Inyungu zingenzi kubikorwa byinganda

Igikoresho Cyiza-Igikoresho: Bitandukanye no gushora imari cyangwa umuvuduko ukabije wipfuye, sodium silikatike isanzwe ikoresha ibiti cyangwa aluminium. Ibi bihendutse cyane kubyara umusaruro kuruta ibyuma bipfa, bigatuma inzira iba nziza kuri prototypes hamwe nicyiciro giciriritse aho gukoresha amortisation biteye impungenge.

Ibipimo bifatika: Imiterere itajegajega ya CO2 ikomye igabanya ibyago byo kugenda kurukuta mugihe cyo gusuka. Ibi bivamo kwihanganira cyane ugereranije numusenyi wicyatsi, akenshi bigera kurwego rwa CT10-CT12 ukurikije ibipimo bya ISO, ibyo bikaba bihagije mubice byinshi byubukanishi bitarinze gukoreshwa cyane.

Ubuso Burangiza Ubwiza: Ibikoresho byakozwe hakoreshejwe ubu buryo byerekana ubuso bworoshye (Ra 12.5-25 mkm) kuruta icyatsi kibisi. Ibi bigabanya gukenera gusya no kurangiza, kugabanya ibiciro byakazi nyuma yo gutunganya.

Kubahiriza ibidukikije: Mugihe amabwiriza y’ibidukikije ku isi akomeje gukomera, imiterere idasanzwe ya sodium silike ni nziza. Ntabwo irekura fenolike yubumara cyangwa fordehide mugihe cyo gusuka, igahuza n’ibipimo by’imyuka ihumanya ikirere mu Burayi no muri Amerika ya Ruguru.

Imipaka hamwe nibitekerezo byubuhanga

Nubwo ari byiza, inzira ntabwo ari rusange. Ba injeniyeri bagomba kubara inzitizi zihariye:

• Gutunganya umucanga Biragoye: Umucanga uhujwe biragoye kugarura byuzuye kubera karubone ya sodium isigaye. Ibi birashobora kuganisha ku gipimo gishya cyo gukoresha umucanga ugereranije na sisitemu ya furan resin hamwe no gutunganya neza ubushyuhe.
• Ubushuhe bw'ubushuhe: Sodium silike ibumba ni hygroscopique. Iyo bibitswe ahantu h'ubushuhe mbere yo gusuka, birashobora gukuramo ubuhehere, biganisha ku nenge ya gaze nkibihumyo muri casting ya nyuma. Kubika neza no gusuka ku gihe ni ngombwa.
• Ibibazo bya Shakeout: Umusenyi ukomye ufite imbaraga zisigaye nyuma yo gukonja, bigatuma shakeout ikora cyane cyangwa ikenera ibikoresho byo kunyeganyega.

Uburyo bwo gukora: Intambwe ku yindi

Nkumushinga wihariye, umurongo wumusaruro wubahiriza akazi gakomeye kugirango tumenye neza. Gusobanukirwa izi ntambwe bifasha abaguzi gusuzuma ubushobozi bwa tekinike yabatanga.

1. Gutegura icyitegererezo no gukora ibishushanyo

Inzira itangirana no kurema igishushanyo, mubisanzwe bikozwe mubiti, aluminium, cyangwa epoxy resin bitewe nubunini bwicyiciro. Igishushanyo gishyirwa mubisanduku. Umusenyi wa Silica, uvanze na 3.5% kugeza 5.5% yumuti wa sodium silike, wapakiwe hafi yicyitegererezo. Kwishyira hamwe kugerwaho binyuze mukuzunguruka, gukanda, cyangwa kuvuza intoki, kwemeza ubucucike bumwe.

2. CO2 Gassing no Gukomera

Umucanga umaze guhunika, isahani ya gaze cyangwa probe byinjizwa mubibumbano. Gazi ya dioxyde de carbone itangizwa kumuvuduko ugenzurwa (mubisanzwe 0.05–0.15 MPa). Gazi inyura mu mucanga, bigatuma abantu bakomera. Igihe cya gaze gitandukana ukurikije ubunini bwububiko, mubisanzwe kuva kumasegonda 30 kugeza kuminota mike. Kurenza gaze bigomba kwirindwa kuko bishobora guca intege ubumwe muguhindura silikatike cyane muri karubone yoroheje.

3. Inteko ibumba hamwe no gutwikira

Nyuma yo gukomera, icyitegererezo kivanyweho. Umuyoboro wububiko urasuzumwa inenge. Ipfunyika yangiritse (akenshi zircon-ishingiye cyangwa igishushanyo-gishushanyo) ikoreshwa hejuru yububiko. Iyi coating ikora intego ebyiri: itezimbere kurangiza hejuru ya casting kandi ikarinda imikoranire yimiti hagati yicyuma gishongeshejwe numucanga, bikagabanya inenge yatwitse.

4. Gushonga no Gusuka

Icyuma gishongeshejwe - ubusanzwe ibyuma bya karubone, ibyuma bivanze, cyangwa ibyuma bikozwe - bitegurwa mu ziko cyangwa mu ziko ry’amashanyarazi. Ubushyuhe burakurikiranwa neza. Kubyuma, gusuka ubushyuhe mubisanzwe biri hagati ya 1550 ° C na 1600 ° C. Icyuma gisukwa muri sisitemu yububiko, ikubiyemo amarembo na riser zagenewe kugaburira neza no kugabanya kugabanuka.

5. Gukonjesha, Kunyeganyega, no Gusukura

Nyuma yo gukomera no gukonjesha, ifu iracika (shakeout). Abakinnyi batandukanijwe na sisitemu yo kwinjira. Kubera ubukana bwumucanga wakoreshejwe, kunyeganyeza imashini akenshi bikoreshwa. Gukata ibishishwa noneho birasa ibisasu kugirango bikureho umusenyi usigaye hamwe na oxyde, hanyuma hakurikiranwe ubugenzuzi.

Ibipimo bya tekiniki nibisobanuro byihariye

Kugirango byoroherezwe gushakisha neza, hepfo haribintu bisanzwe bya tekiniki bifitanye isano na sodium silikatike yumucanga wo guta. Iyi mibare yerekana amahame yinganda ku musaruro wo mu rwego rwo hejuru mu 2026.

Isesengura ryibikoresho

Ibyuma bya Carbone: Nibisanzwe. Ubushyuhe bwinshi bwo gusuka bwibyuma biva mubyuma byo hejuru byumuriro wa sodium silikate. Ibigize nkimibiri ya valve, amazu ya pompe, hamwe nimashini zikoreshwa kenshi.

Shira icyuma: Mugihe bishoboka, sodium silikatike ntisanzwe mubikorwa byinshi byumushatsi wicyuma kubera guhatanira ibiciro biva kumusenyi wicyatsi. Nyamara, kubice binini, bigoye byibyuma bisaba uburinganire bwuzuye kuruta umucanga wicyatsi ushobora gutanga, biracyari amahitamo meza.

Icyuma: Kubishobora kwangirika kwangirika, kode ya sodium silicike itanga ubuso bugabanya kugabanya karubone, bikarinda uburinganire bwibyuma byamanota nka CF8M cyangwa CF8.

Sodium Silicike nubundi buryo bwo gukina

Guhitamo uburyo bukwiye bwo gukina bisaba gusesengura kugereranya. Hasi, tugereranya sodium silikatike yumusenyi hamwe nubundi buryo bwiganje kugirango tugufashe gufata icyemezo neza.

Igihe cyo Guhindura Umucanga Icyatsi Kuri Sodium Silicate

Niba icyatsi cyawe gitanga icyatsi kirimo guhangana nimpinduka zingana cyangwa ubuso bwibice hejuru yicyuma kinini, guhinduranya sodium silikatike ni ukuzamura ubwubatsi bwumvikana. Ifumbire ikaze ikuraho ikibazo cy "uruzitiro" rusanzwe mu mucanga wicyatsi, byemeza ko amasura akomeye hamwe n’ahantu hacuramye bikomeza kwihanganira nta mafaranga akoreshwa cyane.

Igihe cyo Guhitamo Umusenyi hejuru ya Sodium Silicat

Kubintu bikomeye cyane cyangwa ibice bisaba kwihanganira cyane (CT8-9), furan resin cyangwa urethane ya fenolike irashobora kuba hejuru. Nyamara, ibi biza ku giciro cyo hejuru kandi umutwaro wo kubahiriza ibidukikije. Niba igice cya geometrie igoye kandi igereranije nigiciro cyinshi, sodium silikate ikomeza kuringaniza.

Inenge Zisanzwe hamwe nigisubizo cyubuziranenge

Ndetse hamwe nibikorwa byateye imbere, inenge zirashobora kubaho. Uruganda ruzwi rwitandukanya binyuze muburyo bukomeye bwo kugenzura ubuziranenge no gukumira inenge. Hano haribibazo bikunze kugaragara muri sodium silicate casting nuburyo twabigabanya.

1. Ibibyimba hamwe na gaz

Impamvu: Ubushuhe bukabije mu mucanga cyangwa gazi nyinshi hamwe na CO2 birashobora kubyara umwuka cyangwa umufuka wa gaze wafashwe.

Igisubizo: Tugenzura cyane ibirimo ubuhehere bwumucanga wa silika kandi tunonosora igihe cya gaze. Imiyoboro ya Venting ishyirwa mubikorwa byububiko kugirango gazi ihunge mugihe cyo gusuka.

2. Gufata no Kuvunika

Impamvu: Kwiyongera k'ubushyuhe bwumusenyi munsi yubushyuhe bwinshi birashobora gutera hejuru (veining) kuri casting.

Igisubizo: Gukoresha umucanga wa silika-isukuye cyane hamwe na coefficient yo kwaguka yubushyuhe buke hamwe no gukoresha ibishishwa bikomeye byo gutandukanya ibyuma bitandukanya ibyuma byumusenyi wumuriro.

3. Gutwika (Kwinjira mu byuma)

Impamvu: Icyuma gishongeshejwe cyinjira mu byobo byumucanga, bigakora ubuso butagaragara.

Igisubizo: Kugenzura neza uburyo bwo guhuza neza no gukoresha ingano nziza zireba umucanga cyangwa zircon zirinda kwinjira. Itsinda ryacu rya QC rigenzura umubyimba umwe mbere yo guterana.

4. Gutandukana

Impamvu: Kwambara icyitegererezo cyangwa guhuza umucanga bidahuye.

Igisubizo: Uburyo busanzwe bwo gufata neza hamwe na sisitemu yo kuvanga umucanga byikora bikwirakwiza gukwirakwiza guhuza. Twifashishije igenzura rya CMM (Coordinate Measuring Machine) kugenzura ingingo ya mbere yo kwemeza kugirango twemeze gukurikiza imiterere ya CAD.

Gushyira mu bikorwa Sodium Silicate Umucanga

Ubwinshi bwiyi nzira butuma bukwiranye ninganda nyinshi. Muri 2026, icyifuzo cyo kumena ibyuma biramba kandi bikoresha neza bikomeje gutuma abantu bakirwa mumirenge ikurikira.

Inganda na Pompe Inganda

Imibiri ya Valve, bonnets, hamwe na moteri bisaba ubukana bwumuvuduko nubunini bwa flange. Sodium silikatike itanga uburinganire bukenewe hamwe nubuziranenge bwubuso bwamazi, amavuta, na gaze. Ubushobozi bwo guta ibice byimbere imbere hamwe numusenyi bifite agaciro cyane hano.

Imashini ziremereye nibikoresho byubwubatsi

Ibigize nka exavator indobo amenyo adapteri, imirongo ya crusher, hamwe namakadiri shingiro byungukirwa nubushobozi bwibikorwa kubice binini, biremereye. Imbaraga nyinshi zububiko zishyigikira isuka riremereye nta kugoreka, byemeza imiterere yimiterere yibikoresho byimuka kwisi.

Amashanyarazi ningufu

Turbine casings, ibyuma bifata imiyoboro, hamwe nuburyo bwo gushyigikira amashanyarazi n’amashanyarazi akoresha ubu buryo. Ihindagurika ryibikoresho ryemerera gukoresha ibyuma bitarwanya ubushyuhe, byujuje ibisabwa bikora ibikorwa remezo byingufu.

Ubwato bwo mu nyanja

Iminyururu ya Anchor, ibice bya rode, hamwe nibikoresho byimashini bisaba gukomera no kurwanya ruswa. Sodium silicate casting yorohereza umusaruro wibi bice binini, bikomeye kandi bifite imiterere ihamye.

Ibyerekeye Ikoranabuhanga rya Qingdao Qiangsenyuan (QSY): Umufatanyabikorwa wawe Wizewe

Mugihe sodium silikate ikora ari tekinike ikomeye yibikoresho binini byicyuma, guhitamo umufatanyabikorwa ukwiye bisaba kureba ishusho yagutse yubushobozi nuburambe. Qingdao Qiangsenyuan Technology Co., Ltd. (QSY) Azana imyaka irenga 30 yubumenyi mu nganda zogukora no gutunganya, zitanga ibisubizo byuzuye byuzuza inzira ya sodium silike.

Hamwe namahugurwa yumusaruro ureshya na metero kare 50.000, QSY ikora imirongo itandukanye itanga ibicuruzwa birimo ibishishwa, ibishashara byatakaye (ishoramari), hamwe nibikoresho bya CNC bigezweho. Ubu bushobozi butandukanye butuma dukora nkumwanya umwe wihariye wa casting gutunganya serivise. Niba umushinga wawe usaba ikiguzi-cyiza cya sodium silike kubice binini byubatswe cyangwa ibisobanuro bihanitse byo gushora imari kubice bigoye, dufite ibikorwa remezo byo gutanga.

Ubuhanga bwacu bwibikoresho bukoresha ibyuma, ibyuma, ibyuma bidafite ingese, hamwe nudukoresho twihariye nka cobalt ishingiye kuri nikel. Ubu buryo butandukanye bufasha abakiriya mu nganda zinyuranye, zirimo imashini zikoreshwa mu buhinzi, ibikoresho by’ubuvuzi n’ibiribwa, imashini z’inganda, ubucukuzi bw’amabuye y'agaciro, na peteroli. Amaze gukorana neza nabakiriya mu bihugu birenga 20, QSY yiyemeje gutanga amakarita gusa, ariko ibisubizo byubushakashatsi byujuje ubuziranenge bwisi.

Nigute wahitamo Ubushinwa bwizewe Sodium Silicike Yumucanga Wumucanga

Gushakisha biva mubushinwa bitanga inyungu zingenzi, ariko guhitamo abafatanyabikorwa ni ngombwa. Koresha urutonde kugirango usuzume abashobora gutanga isoko ukurikije amahame ya EEAT (Inararibonye, ​​Ubuhanga, Ububasha, Kwizerwa).

1. Kugenzura Ubuhanga bwa Tekinike n'ibikoresho

Baza ibikoresho byabo byo kuvanga, kugenzura gaze, nubushobozi bwo gushonga. Uruganda rwa kijyambere rugomba kuba rufite imashini ivanga umucanga kugirango ihuze neza. Baza ubwoko bwitanura ryabo (induction vs amashanyarazi arc) nubushobozi bwo gusesengura ibintu kugirango ugenzure ibintu.

2. Suzuma Sisitemu yo Kugenzura Ubuziranenge

Shakisha ababikora bafite icyemezo cya ISO 9001. Saba ibisobanuro birambuye kubikorwa byabo byo kugenzura: Bakoresha X-ray kugirango bamenye inenge imbere? Bakora ibizamini byimitungo (tensile, ingaruka)? Raporo ya QC iboneye icyitegererezo nicyiza cyerekana ubuhanga.

3. Suzuma ubufasha bwitumanaho nubuhanga

Umufatanyabikorwa ukomeye atanga ibitekerezo bya DFM (Igishushanyo mbonera cyo gukora). Bagomba gushobora gusuzuma dosiye yawe ya CAD hanyuma bagatanga ibitekerezo kugirango bahindure ubushobozi, kugabanya ibiro, cyangwa ibiciro biri hasi. Inkunga yubuhanga isubiza ni ikiranga uruganda rufite uburambe.

4. Reba niba Ibidukikije byubahirizwa

Hamwe no kwiyongera kwisi yose, menya neza ko uruganda rwubahiriza amabwiriza y’ibidukikije. Baza ibijyanye no guta umusenyi hamwe na sisitemu yo kugenzura ibyuka. Uruganda rwujuje ibisabwa ntirushobora guhura n’ibihagarikwa, bigatuma urwego rutangwa neza.

5. Ongera usuzume ibyabaye hamwe nibisobanuro

Saba ingero z'ibice bisa bakoze. Ubunararibonye bwihariye mu nganda zawe (urugero, valve na mashini) bigabanya umurongo wo kwiga hamwe ningaruka ziterwa nenge. Abakora ibyiringiro bazabishaka basangire ubushakashatsi butamenyekanye cyangwa abakiriya.

Ibibazo Bikunze Kubazwa (Ibibazo)

Ni ikihe gihe gisanzwe cyo kuyobora sodium silikatike yo guta umucanga?

Kubikorwa bishya, igihe cyo kuyobora ni iminsi 15-25, harimo gukora igishushanyo no kugenzura ingingo ya mbere. Kubisubiramo byateganijwe hamwe nibisanzweho, umusaruro urashobora kurangira muminsi 10-15, bitewe nubunini bwurutonde hamwe nibigoye.

Sodiyumu ya sodium ya silike irashobora gukoreshwa kubice bito, bigoye?

Mugihe tekiniki ishoboka, ntabwo ihendutse kubice bito cyane, byuzuye-ibice. Gushora imari cyangwa gushushanya ibishushanyo mubisanzwe bikundwa kubice biri munsi ya 1 kg hamwe nibisobanuro birambuye. Sodium silikate ikwiranye nibice bito kugeza binini (kg 1 kugeza kuri toni nyinshi).

Nigute ikiguzi cyagereranywa no gutunganya umucanga?

Sodium silicate binder muri rusange ihendutse kuruta furan resin. Nyamara, igipimo cyo gutunganya umucanga kiri hasi. Muri rusange, ibyuma biciriritse biciriritse, sodium silikatike itanga amafaranga 10-20% yo kuzigama ugereranije numusenyi wa resin, cyane cyane bitewe nigiciro gito cyo gutunganya no gutunganya byoroshye.

Nibihe bikoresho bishobora guterwa ukoresheje ubu buryo?

Irashobora guhura nibyuma hafi ya byose bya ferrous, harimo ibyuma bya karubone, ibyuma bivanze, ibyuma bidafite ingese, ibyuma byangirika, nicyuma. Yiganje cyane murwego rwo guta ibyuma kubera ubushyuhe bwinshi burimo.

Umucanga urashobora gukoreshwa?

Nibyo, ariko bifite aho bigarukira. Umucanga wakoreshejwe urimo karubone ya sodium isigaye, ishobora kugira ingaruka kumikorere iyo ikoreshejwe neza. Ibishingwe byinshi bikoresha igice cyumucanga wagaruwe kivanze numucanga mushya, cyangwa ugakoresha uburyo bwo gutunganya ubushyuhe cyangwa imashini kugirango ugarure ubwiza bwumucanga.

Nubuhe bunini ntarengwa bwo gukina ushobora kubyara?

Ubushobozi buratandukana nubushakashatsi, ariko sodium silicate molding ikwiranye neza na casting nini cyane. Inganda nyinshi zAbashinwa zirashobora gukora ibice bimwe bipima toni 50 cyangwa zirenga, bigarukira gusa kubushobozi bwa crane nubunini bwitanura.

Umwanzuro: Gushakisha Ingamba zo Kurwego rwohejuru

Sodium silikatike yumucanga ikomeza kuba urufatiro rwo gukora ibyuma bigezweho, itanga uruvange rudasanzwe rwukuri, uburinganire bwubuso, hamwe nigiciro cyibikoresho byiciriritse kugeza binini binini nicyuma. Nkumushinga w’ubushinwa witiriwe sodium silicike yumucanga, twiyemeje gutanga ibisubizo byakozwe neza byujuje ibyifuzo byinganda zisi.

Waba ukeneye ibice bya valve bigoye kurwego rwingufu cyangwa ibice bikomeye byububiko bwimashini ziremereye, ubuhanga bwacu buremeza ko ibice byawe byujuje ibisobanuro byihariye. Mugukoresha tekinoroji igezweho ya CO2, kugenzura ubuziranenge bukomeye, hamwe nibikorwa birambye, dutanga umufatanyabikorwa wizewe wo gutanga kugirango utsinde igihe kirekire.

Witeguye kunonosora urunigi rwawe?

Niba ufite ibishushanyo bya tekiniki cyangwa ibisabwa byihariye, itsinda ryacu ryubwubatsi ryiteguye gutanga isesengura rirambuye rishoboka hamwe n'amagambo yatanzwe. Dufite ubuhanga bwo guhindura ibitekerezo byawe muburyo bwiza, buhenze cyane.

Twandikire uyu munsi kugirango tuganire kubyo umushinga wawe ukeneye hanyuma umenye uburyo sodium silicate casting ibisubizo bishobora kuzamura imikorere yibicuruzwa byawe.

Shakisha Urwego Rwuzuye rwo Gukemura Ibisubizo hamwe nubushobozi bwa tekiniki