FRP pwm- ua txheej txheem yog txheej txheem molding uas cov kua epoxy resin yog tov nrog cov organic lossis inorganic cov ntaub ntawv los ua cov khoom siv matrix, thiab- siv cov qauv ua piv txwv- cov pwm yog manually fabricated txheej los ntawm txheej. Cov txheej txheem tshwj xeeb rau tes nteg -up FRP pwm fabrication yog raws li nram no:
Tsim cov kab Parting
Txawm hais tias txoj kab sib faib yog tsim los muaj kev cuam tshuam tseem ceeb rau qhov yooj yim ntawm kev ua haujlwm, kev tsim cov pwm nws tus kheej, thiab qhov zoo ntawm qhov kawg molded ib feem. Feem ntau, raws li tus yam ntxwv ntawm tus qauv-thiab muab qhov kev ua kom zoo ntawm tus qauv thiab kev sib raug zoo ntawm cov pwm sab sauv thiab sab qis yog ua kom paub tseeb- txoj hauj lwm thiab cov duab ntawm txoj kab sib faib yuav tsum tau ceev kom yooj yim li sai tau. Yog li ntawd, txoj haujlwm ntawm txoj kab sib faib thiab cov rooj vag yuav tsum raug xaiv kom raug thiab muaj kev xav; undercuts (rov qab lub kaum sab xis) yog nruj me ntsis txwv tsis pub tiv thaiv demolding tsis ua hauj lwm. Tus qauv yuav tsum tau ruaj ntseg nyob rau hauv txoj kab uas siv cov ntoo du kom yooj yim rau kev sib cais ntawm cov pwm sab sauv thiab sab qis. Thaum thov tus neeg sawv cev tso tawm rau tus qauv thiab cov kab sib faib, nws yog ib qho tseem ceeb uas yuav tsum tau siv nws sib npaug thiab meej. Nws yuav tsum tau thov nyob rau hauv 2 mus rau 3 lub tsho tiv no, nrog rau txhua lub tsho tiv no tom qab tsuas yog tom qab lub tsho tiv no dhau los ntawm kev tso tawm tus neeg sawv cev tau qhuav tag.
Daim ntawv thov ntawm Gelcoat Txheej
Thaum tus neeg sawv cev tso tawm tau qhuav tag, ib qho tshwj xeeb pwm gelcoat yuav tsum tau siv cov txhuam hauv ob lub tsho sib cais. Daim ntawv thov yuav tsum yog txawm, thiab lub tsho tiv no thib ob yuav tsum tau siv tsuas yog tom qab thawj lub tsho tiv no tau mus txog nws qhov pib txheej (gelation) theem. Cov gelcoat siv yog dub, thiab tag nrho cov tuab ntawm gelcoat txheej yuav tsum tau tswj kom txog li 0.6 hli. Nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov ntawm no tias cov gelcoat yuav tsum tsis txhob siv ntau dhau, vim qhov no tuaj yeem ua rau tawg thiab wrinkling.
Kev npaj ntawm Resin Mixture
Nyob ntawm qhov viscosity ntawm chav tsev -kub- kho cov resin, nws yuav raug preheated rau qhov kub thiab txias. Tom ntej no, sib tov 100 qhov chaw (los ntawm qhov hnyav) ntawm WSP6101-hom epoxy resin nrog 8 mus rau 10 qhov chaw (los ntawm qhov hnyav) ntawm acetone (los yog propylene oxide butyl ether) nyob rau hauv lub thawv huv. Tom qab nplawm kom txog thaum sib tov, ntxiv 20 mus rau 25 qhov chaw ntawm tus neeg sawv cev kho (qhov kom muaj nuj nqis ntawm tus neeg saib xyuas ntxiv yuav tsum tau kho kom haum raws li qhov ntsuas kub ntawm qhov chaw ua haujlwm). Do sai sai, tom qab ntawd muab cov sib tov rau lub tshuab nqus tsev degassing rau 1 mus rau 3 feeb kom tshem tawm cov npuas npuas los ntawm cov kua resin; cov sib tov yog npaj txhij rau siv.
Txheej -los ntawm - Txheej Fiberglass Layup
Thaum cov gelcoat tau mus txog nws qhov kev teeb tsa thawj zaug - hnov mob rau qhov kov tab sis tsis muaj tacky lawm - siv cov epoxy resin sib tov rau saum cov gelled gelcoat siv txhuam. Tam sim ntawd nteg ib txheej ntawm tws strand lev, ces siv ib tug txhuam los sib sau ua ke txheej lev, kom ntseeg tau tias cov resin faib thiab tshem tawm tej huab cua npuas. Qee qhov xwm txheej, cov cuab yeej taw qhia yuav tsum tau txhawm rau txhawm thiab tso cov npuas tawv tawv. Qhov thib ob txheej ntawm tws strand lev yuav tsum tau siv tsuas yog tom qab cov resin sib tov siv rau thawj txheej tau gelled. Tom qab ntawd, cov txheej txheem layup tuaj yeem mus rau hauv ib qho kev sib hloov ntawm ib txheej ntawm fiberglass daim ntaub ua raws li los ntawm ib txheej ntawm tws strand lev. Tom qab nteg txhua 2 mus rau 3 txheej, ib tug yuav tsum tau tos kom txog rau thaum lub exothermic ncov ntawm cov resin curing cov tshuaj tiv thaiv tau dhau lawm -tshwj xeeb yog thaum cov resin sib tov ua ntau viscous (feem ntau tom qab li 60 feeb ntawm 20 degree)-ua ntej mus rau txheej tom ntej, txuas ntxiv cov txheej txheem no kom txog rau thaum lub thickness. Thaum lub sij hawm layup, daim ntaub fiberglass yuav tsum tau nteg kom du thiab tiaj; cov seams nruab nrab ntawm daim ntaub uas nyob ib sab yuav tsum staggered txheeb ze rau ib leeg, thiab sib tshooj yuav tsum tau zam kom ntau li ntau tau ntawm cov ces kaum ntse los yog npoo. Qhov ntau ntawm cov resin siv rau txhua txheej yuav tsum tau tswj nruj me ntsis: nws yuav tsum txaus kom txaus siab rau cov fibers tab sis tsis dhau. Cov ntsiab lus siab resin ua rau nws nyuaj rau tshem tawm cov npuas npuas thiab ua rau muaj kev kub ntxhov ntau dua thaum lub sij hawm kho, ua rau cov nqi qis dua; conversely, cov ntsiab lus tsawg resin ua rau muaj kev pheej hmoo ntawm delamination. Thaum thawj ib nrab ntawm cov pwm tau kho, luas tshem tawm ib qho dhau flash (overhang), ntxuav cov khib nyiab ntawm cov pwm saum npoo thiab qhov chaw ntawm cov qauv qub, tom qab ntawd siv cov pwm tso tawm tus neeg sawv cev, tsim cov txheej txheej gelcoat, tso cov chaw txhaj tshuaj thiab cov cua vents, thiab ua tiav nrog cov txheej txheem ntawm qhov thib ob ntawm cov pwm. Tom qab lub thib ob ib nrab ntawm cov pwm tau kho, luas tawm nws tshaj flash. Txhawm rau kom cov pwm muaj qhov tsim nyog txaus thiab tiv thaiv kom tsis txhob deformation, kev txhawb nqa tsim nyog ribs, fasteners, alignment pins, thiab lwm yam txheej txheem yuav raug khi rau hauv qhov chaw kom ua tiav cov pwm sib dhos.
Demolding thiab Finishing
Rau pwm fabricated ntawm ambient kub (kwv yees li 20 degree), ib qho yooj yim kho thiab cov txheej txheem txheej txheem feem ntau ua tiav tom qab 48 teev, thaum lub sij hawm lub pwm yog npaj rau demolding. Thaum lub sij hawm demolding txheej txheem, nws yog nruj me ntsis txwv tsis pub ntaus cov pwm nrog cov khoom tawv; Hloov chaw, siv cov cua compressed-thov sib quas ntus- kom maj mam cais cov pwm tiav los ntawm tus qauv qauv (tus qauv qauv). Tom qab demolding, thiab nyob ntawm seb cov kev cai tshwj xeeb rau cov pwm daim ntawv thov, kev ua tshuab ua haujlwm -xws li drilling- tej zaum yuav ua rau pwm. Qhov no yog qhov tseem ceeb tshwj xeeb tshaj yog nyob rau hauv "qhov chaw tuag" (nyuaj-mus- mus txog cov ces kaum) qhov twg cov khoom tawm tsam kom ntws thiab sau thaum lub sij hawm casting lossis txhaj tshuaj molding; yog tias tsis muaj lub qhov cua tau npaj ua ntej{11}}, nws yog ib qho tseem ceeb heev uas yuav tau tho qee qhov cua hauv thaj chaw no. Tom ntej no, cov pwm tau dhau los ntawm kev tshaj tawm{13}} ua tiav: feem ntau, qhov saum npoo tau nce qib sanded siv ntub dej - thiab- cov ntawv xuab zeb qhuav xws li 400-grit mus rau 1200-grit, tom qab ntawd polishing nto siv lub tshuab polishing. Thaum tag nrho cov txheej txheem no tiav, cov pwm yog npaj rau kev siv. Ob peb lub ntsiab lus tseem ceeb yuav tsum tau saib xyuas tshwj xeeb: ua ntej, tus tswv pwm (tus qauv) yuav tsum du; thib ob, cov pwm tso tawm tus neeg sawv cev yuav tsum tau thov tusyees; thib peb, tsis muaj huab cua npuas yuav tsum muaj nyob rau thaum thov cov txheej txheem thawj zaug; thiab plaub, cov txheej txheem sanding yuav tsum tau ua kom zoo zoo. Ntawm chav kawm, muaj ntau ntau lwm yam intricate cov ntsiab lus koom nrog nyob rau hauv nruab nrab theem, uas yuav tsis tau tag nrho cov nyob rau hauv no ib tug zuj zus.
