nkhani

1. Kukonza Manja

Kuyika ulusi wokhazikika ndi manja ndiyo njira yachikhalidwe kwambiri yopangira ma flange a pulasitiki olimbikitsidwa ndi fiberglass (FRP). Njira imeneyi imaphatikizapo kuyika pamanja ulusi wothiransalu ya fiberglasskapena mphasa mu nkhungu ndikuzilola kuti ziume. Njira yeniyeni ndi iyi: Choyamba, gawo lamkati lokhala ndi utomoni wambiri limapangidwa pogwiritsa ntchito utomoni ndi nsalu ya fiberglass. Gawo lamkati likauma, limachotsedwa mu nkhungu, ndipo gawo lomangira limapangidwa. Kenako utomoni umayikidwa pamwamba pa nkhungu ndi mkati mwake. Zigawo za nsalu ya fiberglass yodulidwa kale zimayikidwa motsatira dongosolo lokonzekera, ndipo gawo lililonse limapindika pogwiritsa ntchito chopukutira kuti zitsimikizire kuti zimalowa bwino. Akangofika makulidwe omwe mukufuna, gululo limatsukidwa ndikuchotsedwa.

Utomoni wa matrix wopangira zinthu zomangira ndi manja nthawi zambiri umagwiritsa ntchito epoxy kapena unsaturated polyester, pomwe zinthu zomangira zimakhala zapakati pa alkali kapenansalu ya fiberglass yopanda alkali.

Ubwino: Zofunikira zochepa pa zida, kuthekera kopanga ma flanges osakhala a muyezo, komanso palibe zoletsa pa mawonekedwe a flange.

Zoyipa: Ma thovu a mpweya omwe amapangika panthawi yothira utomoni amatha kuyambitsa ma pores, kuchepetsa mphamvu ya makina; kupanga bwino pang'ono; komanso kutha kwa pamwamba kosagwirizana komanso kosakonzedwa bwino.

2. Kupondereza Kuumba

Kupondaponda kumaphatikizapo kuyika zinthu zomangira mu flange mold ndikuzikonza pogwiritsa ntchito makina osindikizira. Zipangizo zomangira zimasiyana ndipo zitha kuphatikizapo zinthu zosakaniza kapena zomangira ulusi, zidutswa za nsalu za fiberglass zobwezerezedwanso, mphete/zingwe za nsalu za fiberglass zomangira ulusi, mapepala a SMC (sheet molding compound), kapena mapepala a fiberglass opangidwa kale. Munjira iyi, flange disk ndi khosi zimapangidwa nthawi imodzi, zomwe zimawonjezera mphamvu ya maulumikizidwe ndi kukhazikika kwa kapangidwe kake konse.

Ubwino: Kulondola kwambiri, kubwerezabwereza, kuyenerera kupanga zinthu zambiri zokha, kuthekera kopanga ma flange ovuta okhala ndi khosi lopindika pang'onopang'ono, komanso malo okongola osafunikira kukonza pambuyo pake.

Zoyipa: Mtengo wokwera wa nkhungu komanso zoletsa kukula kwa flange chifukwa cha zoletsa za bedi losindikizira.

3. Kuumba kwa Resin Transfer (RTM)  

RTM imaphatikizapo kuyika fiberglass reinforcement mu nkhungu yotsekedwa, kubaya utomoni kuti ulowetse ulusi, ndi kuumitsa. Njirayi ikuphatikizapo:

• Kuyika mawonekedwe a fiberglass ofanana ndi mawonekedwe a flange mu dzenje la nkhungu.
• Kulowetsa utomoni wochepa mphamvu pansi pa kutentha koyenera komanso kupanikizika koyenera kuti ulowetse mpweya woyambirira ndikuchotsa mpweya.
• Kutentha kuti kuchiritse ndikuchotsa flange yomalizidwa.

Ma resin nthawi zambiri amakhala polyester kapena epoxy yosakhuta, pomwe zowonjezera zimaphatikizapomphasa zopitilira za fiberglasskapena nsalu zolukidwa. Zodzaza monga calcium carbonate, mica, kapena aluminium hydroxide zitha kuwonjezeredwa kuti ziwonjezere mphamvu kapena kuchepetsa ndalama.

Ubwino: Malo osalala, kupanga bwino kwambiri, kugwiritsa ntchito nkhungu yotsekedwa (kuchepetsa mpweya woipa ndi zoopsa pa thanzi), kulumikiza ulusi molunjika kuti ukhale wolimba, ndalama zochepa zogulira, komanso kuchepetsa kugwiritsa ntchito zinthu/mphamvu.

4. Kuumba kwa Resin Yothandizidwa ndi Vacuum (VARTM)

VARTM imasintha RTM mwa kubaya utomoni pansi pa vacuum. Njirayi imaphatikizapo kutseka fiberglass preform pa nkhungu yachimuna ndi thumba la vacuum, kutulutsa mpweya kuchokera m'mimba mwa nkhungu, ndikukoka utomoni mu preform kudzera mu vacuum pressure.

Poyerekeza ndi RTM, VARTM imapanga ma flange okhala ndi porosity yotsika, ulusi wambiri, komanso mphamvu yapamwamba kwambiri yamakina.

5. Kuumba kwa utomoni wothandizidwa ndi thumba la mpweya

Kuumba kwa RTM kothandizidwa ndi thumba la mpweya ndi mtundu wa ukadaulo woumba womwe umapangidwa pogwiritsa ntchito RTM. Njira yokonzekera ma flanges pogwiritsa ntchito njira iyi youmba ndi iyi: mawonekedwe a galasi opangidwa ngati flange amayikidwa pamwamba pa thumba la mpweya, lomwe limadzazidwa ndi mpweya kenako limafutukuka kunja ndikumangika pamalo a nkhungu ya cathode, ndipo mawonekedwe a flange pakati pa nkhungu ya cathode ndi thumba la mpweya amapindika ndikuchiritsidwa.

Ubwino: Kutambasula kwa thumba la mpweya kungapangitse kuti utomoni upite ku gawo la preform lomwe silinalowetsedwe, kuonetsetsa kuti preform yalowetsedwedwa bwino ndi utomoni; kuchuluka kwa utomoni kumatha kusinthidwa ndi kupanikizika kwa thumba la mpweya; kupanikizika komwe kumachitika ndi thumba la mpweya kumayikidwa mkati mwa flange, ndipo flange ikatha kukonzedwa imakhala ndi ma porosity ochepa komanso mphamvu zabwino zamakanika. Kawirikawiri, mukatha kukonzekera,FRPPogwiritsa ntchito njira yopangira zinthu pamwambapa, pamwamba pa flange payeneranso kukonzedwa motsatira zofunikira pakugwiritsa ntchito kutembenuza ndi kuboola mabowo mozungulira flange.