Umehluko Wokucubungula Injoloba Yemvelo vs Yokwenziwa

Izinto Ezibalulekile Okufanele Uzicabangele

• Igebe langempela liwukuphindaphindeka, hhayi ikhemistri: ukusabalala kwezimpahla ngaphakathiAmayunithi angu-8-12 e-Mooney enjoloba yemvelo uma kuqhathaniswa nama-MU angu-3-5 e-SBR, NBR noma i-EPDMkusuka kumhlinzeki oyedwa.
• Amandla aluhlaza ashukumisa ukusetha kwakho kokusika ngeIsivinini sokudla esingu-10-30%ngesilinganiso esifanayo esingu-0.5 mm, kanye ne-silicone ekugcineni okuhamba kancane.
• Ukuhlanza i-Cryogenic ku--150 degrees Celsiusihlanganisa yonke i-polymer evamile ngoba ukushintsha kwengilazi kusebenza kuphela kusukela kuma-degrees angu-125 kuya kuma-degrees angu-20, kodwa i-flash ethambile ye-silicone iphuma ngamandla omoya kuphela.
• I-Silicone ne-FKM ngokuvamile zidinga i-Ama-degree Celsius angu-200-250 ngemva kokwelashwa kwamahora angu-4-24; irabha yemvelo ivame ukuqedwa ngemva kokuhlinzwa.

Impendulo emfushane:Irabha yemvelo kanye nerabha yokwenziwa kuyahlukahluka ekucutshungulweni kweziteshi ezine okubiza imali:ukuhambisana kweqembu ekungeneni kwezimpahla, amandla aluhlaza kusikhi, imodi yokwehluleka kwe-flash kuyunithi yokukhipha amanzi, nokuthi ingxenye idinga ukwelashwa kwesibili yiniIrabha yemvelo isakazeka amayunithi angu-8-12 eMooney phakathi kwezingxenye kodwa igcina isimo sayo kahle, ngakho-ke ukubekezelelana kokusika kungasebenza kabanzi. I-SBR, i-NBR, i-EPDM, i-FKM kanye ne-silicone kufika kufana kakhulu kodwa kunamandla aphansi aluhlaza futhi kuvame ukudinga ama-degree Celsius angu-200-250 ngemva kokwelashwa i-NR engayiceli.

Umugqa wokukhiqiza awulahlekelwa yimali elabhorethri yamakhemikhali. Ulahlekelwa yimali lapho umugqa welula ngaphansi kwe-feed roller, lapho izinyembezi ezikhanyayo esikhundleni sokuphuka, noma lapho inqwaba iphola ngamaphesenti angu-15 ngokushesha kuneyokugcina. Lo mhlahlandlela ulandela ingxenye kusukela ekungeneni kwezimpahla kuya ekupakisheni futhi uphawula kuphela umehluko ophoqa isethingi ukuthi ishintshe.

Yini Ehluke Ngempela Phakathi Kwenjoloba Yemvelo Neyokwenziwa Ekukhiqizweni?

Umehluko ofika endaweni yokusebenzela ukuphindaphinda, hhayi ukwakheka kwama-molecule.Irabha yemvelo i-cis-1,4-polyisoprene ethathwe ezihlahleni ze-Hevea futhi ihlelwe ngokungcola, umlotha kanye nokuqukethwe okuguquguqukayo. Ngenxa yokuthi ayiklanywanga ngendlela ethile, uthola noma yini ekhiqizwa yisizini. Irabha yokwenziwa, ehlukaniswe ngaphansiI-ISO 1629ngomndeni, i-polymerized ibe yi-specification ethile.

Ngenxa yokuthi okunye okufakwayo kuhlelwe ngamamaki kanti okunye kucacisiwe, i-NR ishintsha izilungiselelo zakho bese kuthi irabha yokwenziwa ishintshe izaba zakho.Lokho kungalingani okukodwa kuchaza wonke umehluko osebenzayo ngezansi.

Kungani Ukuvumelana Kweqembu Kunquma Ukubekezelela Kwakho Kokusika?

Ngoba yonke ipharamitha yokusika oyidayelayo empeleni iyinkolelo yokuthi i-viscosity izoba khona. A Umshini wokusika imicu yerabha ye-CNCibamba ukunemba kokudla okungu-0.1 mm noma ngaphezulu futhi igunda ubukhulu obungu-0-20 mm ngama-stroke afinyelela ku-80 ngomzuzu, kodwa kuphela uma inhlanganisela engena ebaleni inokuqina okucatshangwayo.

Irabha yemvelo kumele ihlafunwe ngaphambi kokuxuba, ngakho-ke ifika kuwe iphethe umlando wokucheba ohluka kakhulu kuningi. Kuwo wonke amarekhodi ezimpahla zamakhasimende, izindawo ze-NR zivame ukusabalalisa amayunithi angu-8-12 e-Mooney (ML 1+4 kuma-degree Celsius angu-100) kuyilapho izindawo ze-SBR, NBR kanye ne-EPDM zisakazeka ku-3-5 MU — amanani ajwayelekile kokuhlangenwe nakho kwethu.

Ukusabalala kwe-MU okungu-8-12 cishe kungukushintshashintsha kwamaphesenti angu-15-20 kokuqina okuhlanganisiwe, okwanele ukushintsha indlela umucu odla ngayo, ukuthi ubuyela emuva kangakanani ngemva kwenkemba, nokuthi ubuso obusikiwe buyisikwele noma budabukile.

Izibalo ezisabalele ziyinani elijwayelekile elivela kokuhlangenwe nakho kwethu, hhayi imikhawulo yekhathalogi — zihlole ngokuqhathanisa nokuhlolwa kwakho okutholayo.

I-Rabber Yemvelo Neyokwenziwa Ihlukana Kanjani Ekususweni Kwe-Flash?

Ukwahlukana kulele endleleni i-flash ehluleka ngayo, hhayi ukuthi ingakanani.I-flash yerabha yemvelo iyanwebeka futhi idabula ibe yizintambo, i-SBR ne-NBR flash ziyaqhekeka, kanti i-silicone flash ibuthakathaka ngokwanele ukuba isuswe.

Ukubanda kuyisilinganiso esijwayelekile. Ukushintsha kwengilazi kusuka cishe kuma-degree Celsius angu-125 e-silicone kuya kuma-degree Celsius angu-20 e-FKM, ngakho-keumshini wokuhlanza i-nitrogen cryogenic owuketsheziku--150 degrees Celsius kubeka konke ngaphansi kwephuzu lokuphuka. Iyunithi yethu ye-LN2 ibamba amalitha angu-80 omthamo we-roller (15-20 kg wezingxenye ezincane) futhi ijikeleza ngaphansi kwemizuzu engu-8 ku-20-70 RPM ngesilinganiso sokudlula esingaphezu kwamaphesenti angu-98.

I-Cryo ayiyona into ezenzakalelayo. I-flash ethambile, enamandla aphansi okudabuka iphuma ne-umshini wokuhlanza umoya onamandla omoyacishe nge-4 kg/min yemidiya, ngobangaphandle kwalokho ubungakhokhela i-nitrogen ewuketshezi ukuze wenze umsebenzi ukuqhuma komoya kwesigamu sesibili sekuphelile kakade. Sebenzisa i-batch ye-scrap ku--80 degrees Celsius kuqala bese wehlisa amazinga okushisa ayi-10 ngesikhathi; isethingi efudumele kakhulu esadlula ukucaciswa kwe-flash yakho yileyo egcina i-nitrogen.

Ingabe Ama-Synthetic Compounds Adinga Umjikelezo Wesibili Wokwelapha?

Ngokuvamile yebo, futhi irabha yemvelo ngokuvamile cha.I-NR vulcanisation ivame ukuqedwa ngaphakathi kwe-press. I-Silicone ne-FKM zidinga ukwelashwa ngemuva kokususwa kwe-volatiles kanye nokuxhumanisa okuphelele, noma isethi yokuqina kanye nokucindezela iyaqhubeka nokukhukhuleka ngemva kokuba izingxenye zifakwe ebhokisini.

Ithuluzi elifanele yi-ihhavini eligoqekayo lokuvuselela okwesibili, hhayi ukucindezela kwesibili. Amayunithi ethu e-XCJ-K600 (600 L) kanye ne-XCJ-K900 (900 L) asebenza kusukela ekushiseni kwegumbi kuya kuma-degree Celsius angu-280 ku-heater engu-10.5 kW, ahambisa umoya ongu-3,000 CBM/H nge-drum engu-octagonal ukuze yonke indawo ibone izinga lokushisa elifanayo, futhi yamukele noma yisiphi isikhathi sokupholisa kusukela emahoreni angu-0 kuya kwangu-99.99.

Beka ukwelashwa kwangemva kokwelashwa ekhadini leresiphi esikhundleni sokukukhumbula.Ifasitela elijwayelekile lamahora angu-4 elishintsha libe amahora angu-6 lishintsha ubulukhuni kanye nesethi yokucindezela, kanye nokuvikelwa okuphindwe kabili kokushisa okungaphezu kwamandla kukhona ngoba i-FKM ephukile ngemva kokwelashwa ishisa kakhulu.

Ukuncipha Kuphula Kanjani Ukubekezelela Kwakho Ngaphambi Kokusika Noma Yini?

Ukushwabana yilapho ingxenye esikwe kahle iba yingxenye engafanele.Ukuncipha kokusika kwamaphesenti angu-1.5-4 kusho ukuthi ubude bokusika kufanele buhlukaniswe ngoyedwa kususwe isibalo sokuncipha, hhayi ukusethwa kubukhulu bomdwebo.I-ASTM D2000isetha amakilasi obulukhuni nokubekezelelana kodwa hhayi ukuncipha, ngakho-ke inombolo kufanele ivele esivivinyweni sakho.

Uma i-gasket incipha ngo-3%, i-gasket eqediwe engu-50.0 mm idinga ukusika okungu-51.5 mm. Isethi ingu-50.0 mm futhi ingxenye isivele ingaphansi ngo-1.5 mm ngaphambi kokuhlolwa — iphutha umqhubi angeke alibone futhi ikhasimende ngeke lilamukele.

I-NR inyakaza ngamaphesenti angu-1.5-3 futhi iyancipha kakhulu phakathi kokusanhlamvu kunaseceleni kwayo, ngoba amaketanga ahamba ngesikhathi sokugaya. I-Silicone ne-FKM zihamba ngamaphesenti angu-2-4 futhi zisabela kakhulu ekushiseni okunempilo kunesikhathi, ngakho-ke iresiphi efanayo kumshini ohlukile ingafika ngaphandle kokubekezelelana.

Yimuphi Umzila Wokuhlanza Ofanelana Nayiphi I-Polymer?

Qondanisa ukugeza nalokho okuphethwe yisicaba, hhayi nalokho okwenziwe yingxenye.Izingxenye ze-NR zifika zigcwele i-talc noma itshe lensipho izingxenye zokwenziwa ezingalithwali, kanti i-NR ivuvukala emanzini kuyilapho i-silicone ingavuvukali.

Iumshini wokuhlanza nowomisa irabhaI-XCJ-QXJ 600 isebenzisa isigubhu esingagqwali esingu-304 esinobubanzi obungu-600 mm nobude obungu-1,000 mm, ithatha ama-15-30 kg ngomthwalo ngamunye futhi isebenzisa amaqembu amathathu anezigaba eziyisithupha. Isebenzisa amalitha angu-20/min amanzi (amathani angu-0.1 ngokuhlanza imizuzu engu-6) kanye nama-2.5 kWh ukuze ihlanze futhi yome imizuzu engu-20 ku-12 kW / 380 V, enezimbobo ezijikelezayo ezingashiyi zindawo ezingaboni.

Ku-NR, sebenzisa ukugeza okufushane kakhulu okusula uthuli, ngoba ukucwiliswa isikhathi eside kuvula ingxenye ngemva kokuthi usuyihlolile kakade. Ku-silicone, isigaba sokwengeza sithola indawo yaso: ukugeza ngamanzi kuphela kushiya ifilimu ebonakala kamuva njengokwehluleka kokubopha emgqeni wekhasimende.

Uwufanelekela Kanjani Umugqa We-Compound Entsha?

Phinda ufaneleke ngezinyathelo ezinhlanu, futhi ungayeqi eyokuqala.Iningi lamaswishi ezinto ezihlulekile ayahluleka ngoba akukho sisekelo esirekhodiwe, ngakho akekho ongafakazela ukuthi yini eshintshile.

1. Faka i-spec engenayo efrijini.Bhala phansi ukujiya kukaMooney, ubulukhuni, amandla adonsela phansi athile kanye nenombolo yesabelo sezindawo ezintathu ngaphambi kokuthinta indawo.
2. Sika kabusha into yokuqala ngesivinini sokuphakelayo esithathu.Gcina okuhamba kancane kakhulu okugcina ukubekezelelana, njengoba isivinini esengeziwe ku-compound enamandla aphansi aluhlaza okwesibhakabhaka sithenga kuphela izinsalela.
3. Thola ifasitela eliqhekekile ebhuqwini.Qala ku--80 degrees Celsius bese wehla ku-10 degrees kuze kube yilapho kuphuma ukukhanya esikhundleni sokudabuka.
4. Bala kabusha ubude bokusika kusukela ekuncipheni okulinganisiwe.Kala izingxenye ezinhlanu emahoreni angama-24 ngemva kokwelashwa, hhayi ngosuku, ngoba ukuncishiswa okuningi kuphelela kulelo windi.
5. Bhala iresiphi yangemva kokwelashwa uye kumlawuli.Izinga lokukhuphuka, izinga lokushisa lokubamba, isikhathi sokubamba kanye nezinga lokupholisa, konke lokhu okune, hhayi nje iphuzu elibekiwe.

Isiphetho: Yikuphi Okufanele Ukulinganise Izinto?

Yenza izinto ezijwayelekile zilawulwe ukuhlolwa kwakho.Inhlanganisela yokwenziwa ene-3 MU yokusabalala ikuvumela ukuthi usebenzise ukubekezelelana okuqinile kanye nokuhlolwa okuncane kwesihloko sokuqala, okubaluleke kakhulu kunanoma iyiphi impahla eyodwa ebonakalayo. I-NR ithola indawo yayo lapho ukuqina kanye namandla okudabuka kubaluleke kakhulu kunokuphindaphindeka - bese uthenga ukubekezelelana ngesivinini sokudla esihamba kancane kanye nokuwasha okufushane.

Kungakhathaliseki ukuthi usebenzisa muphi umndeni, izilungiselelo zihlala emshinini, hhayi ku-polymer. Thumela imininingwane yakho ye-compound, i-gauge kanye ne-flash bese sifanisaukuhlanzwa kwesikhumbanoma ukusika ukusetha kukho.