Kuna ganin wannan tambayar ta tashi a cikin ƙayyadaddun bayanai ko daga abokin ciniki, kuma tunanin nan da nan ba game da kayan abu ɗaya ba ne - game da duk gaskiyar abin da ke faruwa lokacin da kuka sanya hatimi tsakanin taga mai motsi da firam ɗin shawa, yana tsammanin zai daɗe na tsawon shekaru a kan zafi, ruwa, da matsawa akai-akai. Kalmar 'graphite' sau da yawa ana jefa shi azaman ƙurar sihiri, haɓakawa da ake tsammani, amma shin? Tun daga lokacin nawa kan shigarwa da maye gurbin, tattaunawar dorewa ba ta da wuya kawai game da gasket kanta. Yana da game da tsarin, yanayi, kuma a gaskiya, wasu rashin fahimtar juna a cikin sayayya.

Alkawarin Graphite vs. Gaskiyar Yanar Gizo

Masu samar da kayayyaki suna son tout roba mai graphite. Filin tallace-tallace koyaushe shine game da rage juzu'i, mafi kyawun rufewa a ƙarƙashin matsawa, da tsawon rai. Kuma bisa ka'ida, yana da ma'ana. Graphite mai kauri ne. A cikin aikace-aikace mai ƙarfi kamar ƙofar shawa inda taga ko panel yana zamewa ko pivots, rage jujjuyawar da ke kan fuskar tuntuɓar gasket ɗin roba ya kamata ya hana shi tsage ko lalacewa da wuri. Amma ga hiccup na farko: inganci da watsawar graphite. Na ga batches inda graphite yana da alama ya kusan fitar da shi, yana barin ragowa a kan gilashin bayan ƴan watanni da aka yi amfani da shi, yayin da roban da ke ƙarƙashinsa ke komawa yanayin asalinsa, ya zama tacky ko gaggautsa. The karko riba? Negligible, idan ba mara kyau ba. Ba graphite ne ya gaza ba; fili ne aka hada shi.

Sannan akwai saitin matsawa. Wannan shine babba. A gasket yana samun squished tsakanin firam aluminum da gilashin panel. Kyakkyawan haɗin EPDM ko silicone yakamata ya koma baya. Kuna ƙara graphite zuwa gaurayawan, kuma yana iya canza ƙwaƙwalwar polymer. Na tuna da wani aiki kimanin shekaru uku baya inda muka yi amfani da ƙididdiga mai ƙima, bayanin martaba na EPDM mai hoto don jerin manyan shingen shawa na otal. Gwargwadon farko na ban mamaki— shiru, santsi. Amma bayan watanni 18 na amfani akai-akai a cikin danshi, yanayi mai zafi, gaskets sun ɗauki saiti na dindindin. Ba su dawo ba. Hatimin ya zama siriri, lallausan layi, kuma mun fara samun kiraye-kirayen da ake yi don ganin ruwa. Zane-zanen ya taimaka wajen zamewar saman, amma shin ya lalata juriyar kayan don matsa lamba akai-akai? A wannan yanayin, ya zama kamar haka.

Wannan yana haifar da ma'ana mafi girma: ginin roba tushe shine sarki. Graphite ƙari ne, mai gyarawa. Idan ka fara da ƙananan EPDM ko haɗin roba da aka sake yin fa'ida, ƙara graphite kamar sanya band-aid akan batun tsari. Ina yawan zama mai shakka game da ƙayyadaddun bayanai waɗanda kawai ke kira ga graphite gasket ba tare da yin cikakken bayani akan kayan tushe ba, taurin sa ( Shore A), da kewayon zafin sabis ɗin sa. Tambayar dorewa ta canza daga Shin graphite yana da kyau? To Menene wannan graphite gauraye da shi, kuma don menene ainihin dalili?

Harin Muhalli: Ba Ruwa Ne Kawai

Lokacin da muke magana game da gaskets na window shower, 'shawa' ita ce ma'anar aiki, kalma mai ban tsoro. Ba hazo mai laushi ba ne. Yana da zafi mai zafi, hawan zafin jiki daga gilashin sanyi zuwa ruwan zafi, bayyanar sinadarai daga sabulu, shamfu, musamman masu cirewar lemun tsami ko masu tsabtace acidic. Layer graphite kanta na iya zama mai rauni. A cikin wuraren da ke da ruwa mai wuya, ma'adinan ma'adinai (limescale) na iya ɗaure da ɗan ɗanɗano mai laushi, mai lubricated saman gaskat ɗin graphite fiye da na silicone. Kuna samun wannan ƙaƙƙarfan ɓawon burodi mai ɗaci. A tsawon lokaci, duk lokacin da taga nunin faifai, ba aikin graphite-on-gilasi mai santsi ba ne kuma; yana jan ɓangarorin ɓarna a saman duka biyun, sanye da gasket kuma yana iya lalata tashar gilashin.

Bayyanar UV wani mai kashe shiru ne, wanda galibi ana yin watsi da shi don kayan aikin cikin gida. Amma yawancin tagogin gidan wanka suna samun hasken rana kai tsaye. Daidaitaccen EPDM sananne ne mara kyau tare da UV; yana tsattsage kuma yana raguwa. Silicone yana sarrafa shi sosai. Idan graphite ɗin ku yana cikin kayan tushe mai sauƙin kamuwa da UV, fa'idar mai ba ta da mahimmanci da zarar kayan da kansa ya yi hauka kuma ya rabu. Na koyi wannan hanya mai wuya akan gyaran gidan wanka da ke fuskantar kudu. Gasket ɗin sun yi kyau har tsawon shekara guda, sannan suka haɓaka ƙananan ƙwayoyin cuta tare da leɓan da aka fallasa. Har yanzu foda na graphite yana nan a cikin tsagewar, bai yi wani abu ba don riƙe hatimin tare.

Sannan akwai haɓakar ilimin halitta. Mold da mildew. Halin ɓarna na wasu mahadi na roba na iya zama wurin kiwo. Wasu additives, gami da wasu jiyya na graphite, na iya hana hakan, amma ban ga tabbataccen shaida na dogon lokaci ba. Mafi sau da yawa, zaɓin kayan da ba ya bushewa kamar silicone mai inganci, tare da ko ba tare da graphite ba, yana yin ƙari don dorewa a cikin mahalli masu yuwuwa ta hanyar ƙin yarda da ƙasa don spores don kamawa. Ma'aunin ɗorewa a nan ba wai amincin inji ba ne kawai; mutuncin tsafta ne.

Shigarwa: Lokacin Gaskiya

Duk kimiyyar abin duniya a duniya sun gaza a wurin shigarwa. An ƙayyade dorewar gasket ta yadda ake saka shi. Don aikace-aikacen shawa ta taga, ana buƙatar gasket sau da yawa a shimfiɗa ko kuma a jujjuya shi cikin tashar firam na aluminum. Yawan tashin hankali yayin shigarwa yana gabatar da abubuwan damuwa na dindindin. Na ga masu sakawa suna amfani da screwdriver don shigar da gasket a wuri, suna lanƙwasa leɓen rufewa. Wannan ƙaramin nick ɗin, a cikin yanki mai jujjuyawa akai-akai, ya zama hawaye a cikin watanni shida. graphite ba ya taimaka a can.

Dole ne dacewa ya zama daidai. Gasket ɗin da ya yi ƙanƙanta don tashar zai kasance mai tsayi sosai, mai bakin ciki a gefuna na rufewa, kuma ya gaza da wuri. Wanda ya fi girma zai taru, yana haifar da matsi mara daidaituwa da kuma ɗigogi. Samowa daga masana'anta tare da daidaiton juriyar extrusion yana da mahimmanci. Wannan shine inda martabar kamfani ke da mahimmanci. Misali, mun samo madaidaitan faifan faifai da rufe bayanan martaba daga furodusa irin su Hannun Zetai Mretering co., Ltd. ga sauran aikace-aikacen gini. Wurin su a Yongnian, babban madaidaicin sashin tushe a cikin Sin, yawanci yana nuna samun dama ga ɗimbin yanayin halittu da ƙwarewar masana'antu. Duk da yake ban yi amfani da takamaiman su ba roba graphite gasket samfura, ƙa'idar tana riƙe da: masana'anta da ke cikin wannan cibiyar masana'antu galibi suna da ƙarfi sosai akan batches na albarkatun ƙasa da daidaiton extrusion, wanda ke yin tasiri kai tsaye ga shigarwa kuma, don haka, ƙarshen hatimin. Shafin su, zitaifaseners.com, yana nuna mayar da hankali ga masu ɗaure, amma ƙirar masana'anta don madaidaicin abubuwan da suka dace.

Wani shigar nuance: lubrication. Yana sauti na ban mamaki - yana shafan gasket mai mai mai mai. Amma don dacewa mai ma'ana, yin amfani da maganin sabulu mai sabulu ko man shafawa na roba daidai lokacin shigarwa ba abin tattaunawa bane. Yana hana gasket ɗaure ko yage yayin da yake zamewa cikin tashar. Busassun gaskat ɗin graphite, musamman a rana mai dumi, na iya sa ta kama da ɗaure shi. Wannan lalacewar nan da nan ba zai iya haifar da zubewa a rana ɗaya ba, amma yana da tabbacin gazawar.

Batun Harka: Rashin Ƙarfi Mai Girma

Bari in kwatanta takamaiman lamari, mai takaici. Abokin ciniki ya dage akan mafi kyawun gasket don ɗakunan shawa na gidan motsa jiki na kasuwanci. An samar mana da tsada, an shigo da mu daga waje roba graphite gasket, touted ga matsananci karko. Ya ji daɗi-mai laushi, mai yawa, ya bar cikakkiyar alamar graphite akan yatsunsu. Shigarwa ya tafi lafiya. Saurin ci gaba watanni takwas. Gidan motsa jiki ya yi amfani da masu tsabtace chlorine masu tsauri kullum. Gaskets ɗin sun rasa slick ɗinsu, sun zama koɗaɗɗen launin toka, kuma sun zama masu ƙarfi sosai. Ƙofofin da ke zamewa sun fara mannewa, sannan suna firgita. Bayan cirewa, gaskets sun yi rauni; suka tsinke a maimakon murzawa. Chlorine ya kai hari ga sarƙoƙin polymer, kuma graphite ɗin yana zaune ne kawai a cikin matrix da ya lalace. Alamar babban aiki ta kasa yin lissafin takamaiman mahallin sinadarai. Mun maye gurbinsu da gaskat na tushen Viton mai sauƙi, mai jure sinadarai (babu graphite), kuma waɗanda suka daɗe shekaru. Darasin ya kasance mai ban tsoro: dorewa yana da takamaiman mahallin mahallin. Graphite yana magance gogayya, ba juriyar sinadarai ba.

Wannan ƙwarewar ta tura ni koyaushe in nemi, ko ma gudanar da gwaje-gwajen dacewa masu sauƙi. Idan kun san masu tsabtace gama gari mai amfani na ƙarshe zai yi amfani da su, gwada samfurin kayan gasket ɗin da ke nutsewa cikin wannan mai tsafta har tsawon mako guda. Bincika don kumburi, taurare, ko lalata saman. Mataki ne na asali wanda ke ƙetare duk jargon tallace-tallace game da shi gasket karko.

Don haka, Menene Ainihin Aiki don Tsawon Rayuwa?

Dangane da gazawar da aka samu, ga abin da nake ɗauka. Don yawancin aikace-aikacen shawa ta taga, babban matsayi, ƙwaƙƙwarar gasket na silicone sau da yawa sau da yawa ya fi graphite-impregnated roba ɗaya gabaɗaya. karko. Juriya na asali na silicone ga matsanancin zafin jiki, UV, da danshi ya fi girma. Its matsawa saitin dawo da yana da kyau kwarai. Ciniki-kashe shine rikici na farko; zai iya zama dan kauri. Amma ga taga mai lanƙwasa ko da ba a taɓa motsawa ba, wannan ba shi da mahimmanci.

Idan kuna da kofa mai nauyi, akai-akai mai zamewa, to rage juzu'i yana da mahimmanci. A wannan yanayin, fara ba da fifiko ga kayan tushe da farko. Nemo ingantaccen graphite, EPDM mai ƙima ko na'urar elastomer na musamman da aka ƙera (TPE). Tabbatar cewa graphite wani yanki ne mai mahimmanci na fili, ba kawai abin rufe fuska ba. Nemi bayanai akan saitin matsawa (ASTM D395) da ƙara ƙara a cikin ruwa da sinadarai gama gari. Takaddun bayanai ya kamata su ba da labari.

A ƙarshe, sarrafa tsammanin. Babu gasket yana dawwama. A cikin babban amfani, yanayi mai ban tsoro, tsarawa don dubawa da sauyawa wani ɓangare ne na ƙira mai dorewa. Wani lokaci, mafita mafi ɗorewa shine zayyana tsarin don haka ana kiyaye gasket-kare daga UV kai tsaye da fesa mai nauyi, ko kuma a sauƙaƙe maye gurbinsa ba tare da tarwatsa duk sashin taga ba. Bai kamata a mayar da hankali kan abin al'ajabi kawai ba Grain Grax, amma akan ƙirƙirar yanayi mai gafartawa, mai iya kiyayewa a kusa da shi. Wannan shine inda aka gina ainihin, dorewa na dogon lokaci.