SMC Flowability Thiab Nws Kev Sib Raug Zoo Nrog Pwm

SMC (Sheet Moulding Compound) yog iav fiber ntau -cov thermosetting molding compound, inherently siab viscosity thiab ntev fiber ntau.,Flowability tag nrho yog tsav los ntawm siab - kub thiab siab - siab molding, thiab cov qauv pwm yog qhov tseem ceeb sab nraud txiav txim siab qhov zoo ntawm cov khoom ntws thiab cov khoom tsis zoo, Ob leeg txwv ib leeg.

 

I. Qhov kub zoning ntawm pwm ncaj qha hloov cov peev txheej ntawm SMC.

 

Qhov kub ntawm cov pwm cuam tshuam rau viscosity ntawm cov resin.SMC Lub matrix unsaturated polyester ua mos thaum rhuab thiab yog li tau txais fluidity:

 

Tsis tshua muaj pwm kub: Cov resin viscosity siab, thiab cov khoom tsis kam ntawm cov khoom ntws nce sharply, ua rau cov filling tsis txaus, cov khoom tsis txaus, thiab lub zog tsis zoo ntawm cov kab weld;

 

Cov pwm kub kub: Cov txheej txheem saum npoo tau nrawm nrawm nrawm nrawm (ua ntej-gelling), ua lub plhaub tawv uas thaiv qhov ntws ntawm cov khoom siv sab hauv, ua rau npuas, delamination, thiab ntws cov qauv. Qhov ntsuas kub tsis tu ncua rau cov qauv SMC compression molding pwm: 130-155℃. Rau cov khoom loj thiab nyias-walled, kev tswj qhov kub thiab txias yuav tsum tau muab faib ua cov cheeb tsam, thiab cov khoom ntws kawg yuav tsum tau ua kom sov kom tsim nyog.

 

Qhov kub sib txawv ntawm cov pwm ua rau muaj qhov sib txawv ntawm qhov ntwsYog tias qhov kub sib txawv ntawm cov tub ntxhais pwm thiab cov pwm kab noj hniav loj dhau lawm, cov khoom siv yuav nyiam dua mus rau thaj chaw uas muaj qhov kub thiab txias, uas ua rau tsis sib xws ntawm cov iav fibers thiab cov khoom siv hauv zos tsis txaus.

 

 

II. Tus qauv tsim ntawm kab noj hniav txiav txim siab txog cov khoom siv ntws thiab cov dej tsis kam.

 

1. Khoom phab ntsa thickness

· Thick- phab ntsa kab noj hniav: Cov khoom ntws channel yog dav, nrog cov dej ntws tsis zoo thiab cov puv puv, tab sis nws yog qhov ua rau cov npuas npuas;

· Nyias- phab ntsa kab noj hniav: Qhov sib txawv yog nqaim, thiab cov iav fiber ntau yuav txuas thiab thaiv cov khoom, uas ua rau muaj qhov cuam tshuam ntawm fluidity. Nws yog ib qho tsim nyog yuav tsum tau ua kom lub tshuab xovxwm siab thiab optimize qhov kev tso kawm ntawm cov khoom.

 

2.Hloov cov ces kaum, lub kaum sab xis, txhawb cov tav

Lub kaum ntse ntse, me R cov kaum sab xis: Qhov kev tiv thaiv rau cov khoom ntws hloov pauv siab, ua rau cov fibers tau tangled thiab khaws cia, thiab cov dej ntws yuav cuam tshuam; thaum pwm lub kaum sab xis R yog ntau dua lossis sib npaug li 2 hli, qhov ntws tuaj yeem txhim kho tau zoo;

Sib sib zog nqus tav, nqaim grooves: Lawv nyob rau hauv nqaim ntws raws, thiab SMC iav fibers yog nquag mus daig, ua rau txhaws ntawm pwm nyuaj. Nws yog ib qho tsim nyog los nthuav cov hauv paus hniav ntawm cov tav thiab ntxiv cov grooves overflows;

Lub kaum sab xis tsis txaus: Kev sib txhuam ntawm cov phab ntsa ntawm cov pwm kab noj hniav nce ntxiv, cuam tshuam cov khoom los ntawm kev nce mus rau pem hauv ntej.

 

3.Kab noj hniav cheeb tsam thiab txheej txheem ntev

Qhov ntev ntawm cov txheej txheem, qhov ntau dua qhov kev tiv thaiv nyob rau hauv txoj kab ntawm SMC, thiab qhov tseem ceeb tshaj qhov poob ntawm lub davhlau ya nyob twg fluidity; rau ntev - cov khoom ua tiav, nws yog ib qho tsim nyog yuav tsum faib cov ntaub ntawv raw thiab ua kom cov ntug dej ntws los pab rau kev tawm.

 

 

III. Lub molding / overflow system yog cov pwm tseem ceeb rau kev tswj cov dej ntws.

 

Overflow tank (nthuav dav ntug)Tsim cov chaw thoob plaws ib puag ncig pwm yog txoj hauv kev zoo tshaj plaws los txhim kho qhov ntws ntawm SMC: Thaum lub sijhawm molding txheej txheem, cov khoom siv ntau dhau, huab cua, thiab qis - cov ntaub ntawv viscosity ntws mus rau hauv cov dej ntws ua ntej, tsis tu ncua muab lub zog tsav mus rau sab hauv ntawm pwm kab noj hniav, tshem tawm cov npuas npuas thiab tiv thaiv cov kab txuas. Pwm yam tsis muaj qhov dej ntws tawm yog qhov ua rau tsis txaus.

Qhov chaw tsis muaj kab noj hniav, ntws guiding nqes havKev taw qhia txoj kab nqes yog tsim los ntawm qhov chaw pub khoom ntawm cov pwm los coj SMC kom sib npaug ntawm txhua qhov kev taw qhia, tiv thaiv cov khoom thaiv los ntawm kev ua rau cov khoom ntws mus rau unidirectionally lossis ua rau cov fiber ntau hauv zos.

Exhaust qauvQhov tob ntawm cov pwm qhov zawj yog feem ntau 0.03 txog 0.08 hli: Yog tias cov roj tsis tuaj yeem tso tawm, nws yuav ua rau huab cua thaiv, ncaj qha thaiv cov khoom ntws; Cov pa cua tsis zoo yuav tshwm sim zoo li tsis muaj dej txaus, tab sis qhov tseeb nws yog vim muaj kev cuam tshuam ntawm cov roj.

 

Nto tiav ntawm pwm, kev sib txhuam ntawm qhov sib cais, thiab nws qhov cuam tshuam rau kev ntws

· Cov kab noj hniav ntxhib, khawb, qhov corrosion: Ua kom muaj kev sib txhuam ntawm SMC thiab pwm phab ntsa, ua rau cov khoom ntws qeeb, thiab ua rau cov cim ntws ntawm cov khoom;

 

· Ntau qhov sib txawv ntawm qhov chaw seem: Tom qab siv lub siab, cov resin ntws tawm hauv qhov ntau ntawm qhov sib cais, ua rau cov khoom tsis txaus hauv cov kab noj hniav, zoo li qhia tias tsis txaus txaus; qhov sib txawv me me dhau los ua rau cov pa tawm tsis zoo thiab ua haujlwm siab.

 

VI. Qhov nruj ntawm pwm thiab pwm kaw qhov sib txawv tsis ncaj qha cuam tshuam rau qhov zoo fluidity.

 

Tom qab lub tshuab xovxwm siv lub siab, yog tias cov pwm rigidity tsis txaus, yuav muaj pwm nthuav dav me ntsis, lub thickness ntawm cov kab noj hniav hauv zos yuav nce, thiab cov khoom ntws tawm yuav ua tsis zoo. Cov pwm kaw tsis sib xws yuav ua rau cov khoom siv tsis sib xws ntawm qhov chaw sib txawv, qhov tuab ntawm cov khoom tsis sib xws, thiab kev cuam tshuam ntawm fiber ntau.

 

V. Kev sib txuas lus ntawm Cov Kev Tsis Txaus Siab hauv Cov Pwm thiab Lawv Ua

 

qhov tshwm sim tsis zoo	Lub hauv paus ua rau pwm
Cov ntaub ntawv tsis txaus, tsis txaus filling ntawm pwm	Cov txheej txheem ntev, cov phab ntsa nyias, nqaim ribs, pwm kub tsis tshua muaj, tsis muaj cov dej ntws tawm, thaiv qhov chaw nres nkoj
Surface swirls thiab ripples	Cov kab noj hniav tsis zoo, qhov sib txawv ntawm qhov kub thiab txias, qhov tob tob tob, thiab cov khoom siv tsis sib xws
Txheej, npuas	Tsis txaus overflow, me me dhau groove, thiab siab heev hauv zos pwm kub ua rau ntxov ntxov gelation.
Local iav fiber tsub zuj zuj	Flow channel hloov pauv sai sai, txoj cai- lub kaum sab xis, qhov tob thiab nqaim reinforcing tav
Fusion weld marks yog fragile.	Tsis muaj dej ntws los yog tso pa tawm ntawm qhov sib txuas uas ob cov khoom sib ntsib.

 

 

VII. Kev Npaj Ua Haujlwm Zoo rau Kev Txhim Kho Cov Fluidity ntawm SMC hauv Pwm End Elevation

 

• Moulding kab noj hniav: Tag nrho cov ces kaum yog rounded nrog loj radii, lub nqaim tav yog thickened nyob rau hauv lub hauv paus, thiab ib tug guiding qauv yog ntxiv nyob rau hauv cov txheej txheem ntev;
• Kev tswj qhov kub thiab txias: Cov pwm muaj kev ywj pheej cua sov circuits. Qhov kub ntawm qhov chaw pub mis yog me ntsis qis, thiab qhov kub ntawm qhov kawg ntawm cov khoom ntws yog tsim nyog;
• Overflow thiab tso tawm: Nruam cov npoo npoo yog teem raws cov khoom contour. Exhaust grooves yog ntxiv cais ntawm cov ces kaum thiab cov ntsiab lus convergence khoom;
• Kev kho deg: Cov pwm kab noj hniav yog polished rau daim iav tiav kom txo qhov kev sib txhuam ntawm cov khoom siv phab ntsa;
• Pwm kaw kev tswj: Ua kom lub rigidity ntawm pwm template, uniformly tswj lub pwm kaw qhov sib txawv, thiab tsis txhob overflow ntawm tej cheeb tsam.

 

ua sum

 

SMC tus kheej formulation (resin, iav fiber ntau, fillers) txiav txim siab qhov kev khiav hauj lwm yooj yim, tab sis cov pwm yog cov cab kuj rau tag nrho cov kev khiav dej num: kub, kab noj hniav geometry, venting, deg kev sib txhuam, thiab pwm rigidity sib koom ua ke tswj kev khiav hauj lwm, khiav kev taw qhia, thiab filling ceev. Rau tib batch ntawm SMC raw cov ntaub ntawv, hloov pwm los yog hloov cov qauv kab noj hniav yuav ua rau cov molding sib txawv kiag li nrog rau qhov sib txawv tseem ceeb hauv flowability.