HP-RTM tsari

1. Gabatarwa ga tsarin HP-RTM

HP-RTM (High Pressure Resin Transfer Molding) shine takaitaccen tsari na canja wurin guduro mai matsa lamba. Fasaha ce ta ci-gaba wacce ke amfani da matsa lamba mai ƙarfi don haɗawa da allurar guduro a cikin injin da aka kulle riga-kafi tare da kayan ƙarfafa fiber da abubuwan da aka riga aka saita. Gudun guduro yana gudana ta hanyar cikewar mold, impregnation, curing da demulding. , don samun tsarin gyaran gyare-gyare na kayan aiki mai mahimmanci da ma'auni mai mahimmanci. Yana da fa'idodi na babban inganci, ceton makamashi, da kare muhalli, kuma an yi amfani da shi sosai a cikin motoci, sararin samaniya, kayan lantarki da sauran fannoni.

Ana nuna tsarin a cikin hoto 1:

Hoto 1 Tsarin tsari na tsarin tsarin HP-PTM

2. HP-RTM tsari halaye

HP-RTM ya haɗa da sarrafa preform, alluran guduro, aiwatar da latsawa da tsarin datsa. Idan aka kwatanta da tsarin RTM na gargajiya, tsarin HP-RTM yana haɓaka aikin latsawa bayan allura, yana rage wahalar allurar guduro da cikowa, yana haɓaka ingancin preforms, kuma yana rage zagayowar gyare-gyare. Halayen tsari na musamman sune kamar haka:

(1) Cikowar mold mai sauri. Gudun guduro da sauri ya cika kogon mold, yana da sakamako mai kyau na infiltration, yana rage kumfa da porosity sosai, kuma ƙarancin danko guduro yana ƙara saurin allura na guduro kuma yana gajarta tsarin sake zagayowar.

(2) Guduro mai aiki sosai. Adadin maganin guduro yana ƙaruwa kuma ana taqaitaccen zagayowar maganin guduro. Yana ɗaukar babban tsarin guduro mai saurin warkewa kuma yana ɗaukar babban aiki mai ƙarfi mai ƙarfi da kayan aikin allura don cimma ingantacciyar haɗin kai na matrix resin. A lokaci guda, ana buƙatar yanayin zafi mai zafi yayin gyare-gyaren, wanda ke inganta yawan maganin resin na resin sosai, yana rage tsarin samarwa, kuma yana daidaita tsarin. Babban kwanciyar hankali da maimaitawa,

(3) Yi amfani da wakili na saki na ciki da tsarin tsaftacewa don inganta aikin tsaftacewa na kayan aiki. Ana amfani da fasaha mai tsaftace kai na kan hadawa na allura, kuma an ƙara wani ɓangaren wakili na saki a cikin albarkatun ƙasa don inganta ingantaccen tsaftacewa na kayan aiki. A lokaci guda, tasirin samfurin yana da kyau sosai, kuma kauri da ɓata siffar ƙananan ƙananan. Cimma rahusa, gajeriyar zagayowar (babban girma), samarwa mai inganci.

(4) Yi amfani da in-mold in-mold fasahar vacuum mai sauri. Abubuwan da ke cikin pore a cikin sassan sun ragu kuma an inganta aikin sassan. Yana da kyau yana rage abun ciki na pore a cikin samfurin, yana inganta haɓakar fiber impregnation, yana haɓaka ikon haɗin kai tsakanin fiber da guduro, da haɓaka ingancin samfurin.

(5) Haɗa vacuuming tare da tsarin gyare-gyaren matsawa bayan allura. An rage wahalar aiwatar da sassa kuma an inganta ingantaccen kayan ƙarfafawar resin-impregnated. Yana rage wahalar zayyana tashar tashar allurar manne da tashar shaye-shaye na tsarin RTM, yana haɓaka ƙarfin cikowar guduro, da ingancin ƙarancin fiber ta guduro.

(6) Yi amfani da fastoci biyu masu tsauri don rufe ƙirar, kuma yi amfani da babban latsa na'ura mai ɗaukar nauyi don matsawa. Samfurin yana da ƙananan sabani a cikin kauri da siffa mai girma uku. Don tabbatar da tasirin gyare-gyaren gyare-gyaren, ana amfani da sassa biyu masu tsauri don rufe ƙirar, kuma ana amfani da latsa mai girma-tonnage don matsa lamba, wanda ke ƙara ƙarfin clamping yayin aiwatar da gyare-gyaren kuma yadda ya kamata ya rage kauri da ɓata siffar siffar. na sassa.

(7) Samfurin yana da kyawawan kaddarorin ƙasa da inganci. Yin amfani da fasahar feshi a cikin gyaggyarawa da kyalli masu kyalli, sassan na iya samun ingantacciyar inganci a cikin ɗan gajeren lokaci.

(8) Yana da babban tsari kwanciyar hankali da maimaitawa. Yin amfani da allurar rata da fasaha na matsawa bayan allura yana haɓaka ƙarfin cikowar ƙira na guduro, yadda ya kamata yana rage yuwuwar lahani na tsari, kuma yana da babban aikin maimaitawa.

3. Mahimmin fasahar aiwatarwa

(1) Fasaha ta riga-kafi na kayan ƙarfafa fiber

Fasaha preforming fiber ya ƙunshi: yadi, saƙa da preforming preforming; preforms dinki; yankakken fiber allura preforms; zafin latsa preforms, da dai sauransu. Daga cikin su, fasahar siffa mai zafi ta fi amfani da ita. A cikin wannan fasaha, wakili mai tsarawa shine garanti na asali, kuma fiber preforming mold da latsa fasaha sune mabuɗin yin fiber. Don tsarin HP-RTM, tsarin ɓangaren yana da sauƙi mai sauƙi, don haka ƙirar ƙirar ma yana da sauƙi. Makullin ya ta'allaka ne akan yadda ake sarrafa ƙirar ƙira da matsi da kayan aiki don dacewa da tsari mai ƙarfi da tsari ta hanyar ƙira da hanyoyin sarrafawa.

(2) Babban madaidaicin guduro metering, hadawa da fasahar allura

Hadawa da alluran guduro tsari na HP-RTM galibi sun haɗa da tsarin guda biyu: babban kayan guduro da guduro mai fesa a cikin-mold. Makullin sarrafa shi ya ta'allaka ne a cikin ingantacciyar tsarin auna guduro, fasahar hadawa da sauri kuma iri ɗaya da fasahar tsabtace kai da kayan haɗawa. Babban kayan aikin guduro na HP-RTM yana buƙatar auna daidai a ƙarƙashin babban zafin jiki da matsa lamba, wanda ke buƙatar kayan aikin famfo madaidaicin madaidaici. Haɗin Uniform da tsaftace kai na guduro yana buƙatar ƙirar ingantaccen, tsaftacewa, kai mai haɗawa da yawa.

(3) Molding mold zafin jiki filin uniformity da sealing zane

A lokacin tsarin HP-RTM, daidaiton yanayin yanayin zafin jiki na ƙirar ƙirar ba wai kawai ya ƙayyade kuma yana rinjayar kwararar ruwa da cika aikin guduro a cikin kogin mold ba, amma kuma yana da tasiri mai girma akan aikin infiltration na fiber, aikin gabaɗaya. na kayan da aka haɗa, da damuwa na ciki na samfurin. . Saboda haka, ya zama dole a yi amfani da matsakaicin dumama hade tare da ingantaccen kuma m wurare dabam dabam na mai kewaye zane. Ayyukan rufewa na gyare-gyaren kai tsaye yana ƙayyade ƙayyadaddun guduro da halaye masu cika gyare-gyare, da kuma ikon fitarwa na tsarin gyare-gyare. Hanya ce mai mahimmanci wacce ke shafar aikin samfur. Wajibi ne a tsara matsayi, hanya da kuma adadin zoben rufewa bisa ga samfurin. A lokaci guda, yana da mahimmanci don magance matsalolin rufewa a cikin rata mai dacewa, tsarin fitarwa, tsarin vacuum da sauran wurare don tabbatar da cewa babu iska a yayin aikin cikawar resin don tabbatar da aikin sashi.

(4) Babban madaidaicin latsawa na hydraulic da fasahar sarrafawa

A cikin tsarin HP-RTM, sarrafa rata mai rufewa a cikin tsarin cikowar guduro da sarrafa matsa lamba a cikin tsarin latsawa duk suna buƙatar garantin ingantaccen tsarin latsawa na hydraulic mai inganci. A lokaci guda, ana buƙatar samar da fasahar sarrafa lokaci bisa ga buƙatun tsarin allurar manne da latsawa don tabbatar da ci gaba da yin gyare-gyare.