Xa abantu abaninzi besiva 'i-rubber gasket,' bafanekisela iringi elula emnyama, into yorhwebo. Leyo yimbono yokuqala ephosakeleyo. Enyanisweni, ukhetho phakathi kwe-EPDM, i-Nitrile (NBR), okanye i-Viton (FKM) ikhompawundi ayikho malunga nexabiso kuphela; imalunga nemo yokusilela kwendibano yakho iphela. Ndibone iiprojekthi ezininzi apho ixabiso eliphantsi, elenziwe lafana nelo irhasi yerabha kubangele ukuvuza emva kweenyanga ezintandathu ngenxa yokuba umntu ugcine i-$ 0.50 ngeyunithi kwaye akayihoyi iphepha lokuhambelana neendaba. I-gasket lihashe elithuleyo, kwaye ukusilela kwayo akufane kwenzeke—idla ngokuba lithontsi eliba sisikhukula.

I-Material AyiyoRubber Nje

Makhe sicacise. Kwiiyunithi ze-HVAC zangaphandle, i-EPDM yinto engagqibekanga ngesizathu-egqwesileyo i-ozone kunye nokumelana nemozulu. Kodwa ukuba loo yunithi ikufuphi nommandla oselunxwemeni, uqala ukuxhalaba ngesitshizi setyuwa. Ingaba ikhompawundi inezongezo ezaneleyo zokuchasa ukuguga? Ibhetshi esiyifumene ngo-2019 kumthengisi wasekhaya wasilela kuvavanyo lokucinezela kwangaphambi kwexesha. Izinto eziphathekayo zaziva zilungile, zadlula imbonakalo esisiseko, kodwa phantsi koxinzelelo lweflange oluzinzileyo, kwathatha iseti esisigxina kunye nokulahleka kwamandla okutywina. Nantso ke into: amaphepha edatha ayindawo yokuqala, ayisosiqinisekiso.

Emva koko kukho ukumelana namafutha. Umgibe oqhelekileyo. I-Nitrile isoloko ichazwa kulwelo olusekwe kwi-oyile. Nangona kunjalo, ioli ayicacanga kakhulu. Ngaba i-hydraulic fluid, idizili, okanye i-biodiesel blend? Iimpawu zokudumba ziyahluka kakhulu. Ndikhumbula iprototype yecandelo lenjini encinci apho iNBR eqhelekileyo irhasi yerabha idumbe phantse i-15% kumxube omtsha we-bio-diesel, obangela ukukhutshwa okungafanelekanga. Kuye kwafuneka sitshintshele kwibakala eliphezulu le-acrylonitrile NBR. Isifundo yayikukuhlala ndivavanya ngolwelo oluchanekileyo, kwiqondo lobushushu lokusebenza.

Kwaye kwizicelo zobushushu obuphezulu, ukutsiba kwi-silicone ukuya kwiViton yindleko yokuphindaphinda. I-Silicone inokusingatha i-225 ° C, kodwa amandla ayo okukrazula aphantsi. IViton iphatha ubushushu kunye neekhemikhali ezinobundlobongela, kodwa iqinile. Udinga umthwalo ophezulu webholt ukuze ufezekise ukunyanzeliswa kwetywina okufanelekileyo, okunokuphazamisa iiflanges ezilula. Ngumcimbi woyilo lwenkqubo, hayi nje umba we-gasket. Ngamanye amaxesha, isisombululo asiyiyo i-gasket engcono, kodwa ukuyilwa ngokutsha kwedlala okanye ukutshintshela kwisitywina se-rabha yentsimbi.

Ijometri kunye noxinzelelo: Imiba elityelweyo

Impahla egqibeleleyo kwisimo esingalunganga ayinamsebenzi. I-durometer (ubunzima) kufuneka ihambelane nokugqiba umphezulu we-flange kunye nomthwalo okhoyo woxinzelelo. A 70 Shore Igasket ekwiflange erhabaxa, etyhidiweyo inokutywinwa kakuhle, njengoko inokukhubazeka ibe kukungafezeki. Kwaloo gasket ifanayo kumphezulu wentsimbi engenasipili egqityiweyo inokufuna icandelo elinqamlezayo elimxinwa kakhulu ukunyusa ukulayisha iyunithi.

Senze i-PTFE flange yesiko lenkqubo yekhemikhali kanye kwaye sasebenzisa i-gasket ye-EPDM yecandelo lesikwere. Yavuza. I-flange yayiqinile kwaye igudile. Ulungiso yayingeyonto intsha; kwakutshintshile kwi-O-ring kwi-groove eyenziwe ngokufanelekileyo (i-elastomeric seal, ewe, kodwa umgaqo ufana). I irhasi yerabha ifuna isithintelo sokucinezela esichaziweyo. Kulapho irabha idibana khona nendlela, ngokoqobo-uyilo lojongano sisiqingatha sedabi.

Iseti yoxinzelelo ngumbulali. Uyayitolika iibholithi, iyatywina. Emva kwemijikelo ye-thermal kunye nexesha, irabha ayibuyi. Amandla okubamba ayehla. Ndikhetha iigaskets ezinondoqo weselula okanye imixube ethile yepolymer echasene noku, kodwa zibiza ngaphezulu. Lurhwebo phakathi kweendleko zokuqala kunye namathuba olondolozo. Kwindawo ebiyelweyo evaliweyo engazange ivulwe, udinga isethi ekufutshane neqanda. Kwiphaneli yokufikelela ehlolwa rhoqo ngonyaka, i-25% iseti inokwamkeleka.

Ukufumana kunye nokungaguquguquki: Intloko yokwenyani yehlabathi

Kulapho ithiyori idibana khona nomgangatho omdaka. Ungakhankanya i-ASTM D2000 yokufowuna imini yonke, kodwa ukuba ibhetshi-to-bistency yomboneleli wakho icinyiwe, usengxakini. Ndine-gaskets evela kwi-SKU efanayo, eyalelwe iinyanga ezintandathu ngokwahlukeneyo, apho umbala kunye nokucotha kwakwahluke ngokubonakalayo. Umthengisi ufunge ukuba ifomula iyafana. Mhlawumbi umthengisi wezinto eziluhlaza utshintshile, mhlawumbi ixesha lokunyanga litshintshiwe. Udinga umthengisi one-QC engqongqo, hayi nje inkampani yokurhweba.

Kwi-volume ephezulu, i-fastener esemgangathweni kunye nokutywinwa kwezicelo, amaqela ejografi abalulekile. E-China, iSithili saseYongnian e-Handan siyindawo enkulu yokuvelisa iindawo eziqhelekileyo. Inkampani esekwe apho, njengaye I-Sunnian Zitai Festener Fishaner Comment Com., ngokwendalo inokufikelela kwikhonkco lonikezelo oluxineneyo kuzo zombini iziqhoboshi kunye namalungu okutywina anxulumeneyo. Indawo yabo ikufuphi neendlela ezinkulu zothutho (https //wwww.ziitasteners.com) ayisiyondawo yokuthengisa; kuthetha ukuba ulungiselelo lwemixube yerabha ekrwada kunye nempahla egqityiweyo ilungelelanisiwe. Kwiprojekthi efuna ukuhanjiswa okulungelelanisiweyo kweebholithi, iiwasha, kunye nokusikwa ngokwesiko irhasi yerabha Amaphepha, ukukhangela okunjalo okudibeneyo kunokuthintela amaphupha amabi wokulungelelaniswa.

Kodwa nasi isilumkiso: ukuba kwisiseko semveliso akuqinisekisi ngokuzenzekelayo umgangatho. Kuthetha ukuba kufuneka ucacise ngakumbi. Xa usebenzisana nabavelisi abanjalo, kuya kufuneka ucele imihlaba yonyango, isatifikethi sohlalutyo lwekhompawundi yerabha, kwaye mhlawumbi neesampulu zebhetshi ezincinci zovavanyo lokuntywiliselwa phambi kokuba kuqhutywe imveliso epheleleyo. Ubuchwephesha babo kwiziqhoboshi bunokuba yinto edibanisayo ukuba bayaluqonda unxulumano lwamandla okubamba, kodwa ubuchule babo obungundoqo busenokungabi kukwenziwa kwe-elastomer ephucukileyo.

Uhlalutyo lokungaphumeleli: Yintoni okufundiswa kukuvuza

Awona maxesha emfundo avela emva kokubhubha. Ukuvuza akukho nje ukuvuza; ipateni yayo ibalisa ibali. Uniform uyalila ngeenxa zonke kwiflange? Uxinzelelo olunokwenzeka olunganelanga okanye ukungahambelani kwemathiriyeli. Ukuvuza kwiquadrant enye? Mhlawumbi i-torque engalinganiyo yebholithi okanye i-warpage ye-flange. Ukuvuza okuvela kuphela emva kwebhayisekile eshushu? Ukwalatha ngokuthe ngqo ekungahambelani kokwandiswa kobushushu okanye iseti yoxinzelelo olugqithisileyo.

Ndasebenza kwizindlu zempompo apho ukuvuza kwakungaphazanyiswa. Yenzeka kuphela ekuqaleni. Sitshintshe i-gasket kabini nge-spec efanayo. Ekugqibeleni, sibeka imilinganiselo yoxinzelelo kwimingxuma yeebholiti. Kufumaniseke ukuba uyilo lwezindlu lubangele ukuphakanyiswa kweflange kancinci kuxinzelelo oluthile lwangaphakathi. I irhasi yerabha ayikwazanga kuphinda ikhawuleze ngokwaneleyo ngexesha lomsitho oguqukayo. Isisombululo yayiyi-gasket enemodyuli ephezulu yokuqina kunye ne-durometer esezantsi kancinci ukuphucula ukuhambelana phantsi kokutshintsha kwemithwalo. I-spec sheet yayingasoze ikuxelele loo nto.

Ngelinye ixesha, kwavela i-gasket idliwe. Uhlaselo lweekhemikhali? Ekuhlalutyweni, yayiyimpahla eyingozi kakhulu. Ulwelo oludlulayo luqulathe i-particle encinci, kwaye isiphithiphithi sabukhukulisa ubuso be-gasket ekuhambeni kwexesha. Isixhobo esinzima okanye isitayela se-gasket esahlukileyo kunye noyilo lokuqondisa ukuhamba lwalufuneka. Kwakubonakala ngathi ukusilela kwemichiza kodwa yayingoomatshini. Soloko ukufumana isampulu yenxalenye engaphumelelanga kwaye uyijonge ngokwenene.

Ngaphaya kweRingi esemgangathweni: Uzifumane nini isiko

Stock die-cut sheets kunye ne-AS568 O-rings eziqhelekileyo zigubungela i-80% yeemfuno. Kodwa i-20% eseleyo ibangela i-80% yeentloko ezibuhlungu. Apha kulapho ukubumba ngokwesiko okanye ukusika kwelathe kuba yimfuneko. Iimilo ezintsonkothileyo, imilebe yokutywina edibeneyo, okanye iibhondi zezinto ezininzi (njengetywina lerabha elidityaniswe kumphathi wentsimbi) ziwela apha.

I-trigger yomsebenzi wesiko ayiyonto nje engaqhelekanga. Kuxa amacandelo asemgangathweni akakwazi ukuhlangabezana noxinzelelo, i-extrusion, okanye iimfuno zobomi. Umzekelo, isigqubuthelo sendlela enkulu, esingaqhelekanga kwitanki. I-gasket enqunywe kwiphepha iya kuba ne-spliced ​​joint-indawo enokuvuza. Ukubunjwa ngokuqhubekayo okanye i-lathe-cut looped gasket iyayisusa loo nto. Ixabiso lezixhobo liphezulu, kodwa kwisicelo esibalulekileyo, kuyathetheleleka. I-matrix yesigqibo ibandakanya umthamo, ukubaluleka, kunye neendleko ezipheleleyo zokungaphumeleli.

Ukusebenzisana nomvelisi onje nge-Handan Zitai Fastener ekhankanywe, uya kusebenzisa ubuchule babo bokuqhobosha kuyilo lwebholithi kodwa kuya kufuneka ukuba baqinisekise ubuchule babo bokusetyenzwa kwerabha-okanye amaqabane abo avavanyiweyo- bayakwazi ukujongana nenxalenye ye-elastomer yesiko. Ukudibanisa ngundoqo. Ukuthumela uyilo lwe-gasket yesiko kwivenkile yerabha kunye ne-bolt specs kwivenkile yokubopha, kwaye unethemba lokuba ziyahambelana, yindlela yokukhangela iminwe xa kuvela imiba. Umthengisi onokongamela okanye abonelele zombini uzisa uxanduva lokuphendula.

Ngoko, ijikeleza ngasemva. A irhasi yerabha asiyonxalenye nje. Lunxibelelwano lwenkqubo oluchazwa yikhemistri, uyilo loomatshini, ukwenziwa okungaguqukiyo, kunye nofakelo olusebenzayo. I-spec sisiqalo sencoko, hayi isiphelo. Ufunda ukuhlonipha i-gasket ethobekileyo, kuba xa ungayihoyi ama-nuances ayo, inendlela echanekileyo yokukukhumbuza ngokubaluleka kwayo.