Cov teeb meem zoo thiab cov kev daws teeb meem rau kev kos duab hydraulic presses

Txawm hais tias SMC cov khoom siv molding txheej txheem yog qhov ua tau zoo tshaj plaws nyob rau hauv cov iav fiber reinforced yas / cov khoom sib xyaw molding txheej txheem. SMC cov khoom siv molding txheej txheem kuj muaj ntau qhov zoo, xws li: cov khoom lag luam raug qhov loj, du nto, cov khoom zoo thiab qhov loj dua, cov qauv nyuaj kuj tuaj yeem ua pwm ib zaug, thiab kev ua haujlwm theem nrab tsis tas yuav ua rau cov khoom puas. Txawm li cas los xij, qhov tsis txaus ntseeg tuaj yeem tshwm sim hauv cov txheej txheem tsim khoom ntawm SMC cov khoom siv molding, uas feem ntau tshwm sim hauv cov hauv qab no:

(1) Tsis muaj cov khoom siv

Tsis muaj cov khoom siv txhais tau hais tias SMC cov khoom sib xyaw molded qhov chaw tsis ua tiav, thiab cov chaw tsim khoom feem ntau yog tsom rau ntawm cov npoo ntawm cov khoom SMC, tshwj xeeb tshaj yog cov hauv paus hniav thiab sab saum toj ntawm cov ces kaum.

Generation mechanism thiab countermeasures:

①Tom qab cov khoom SMC yog yas los ntawm tshav kub, yaj viscosity yog loj. Ua ntej qhov kev sib txuas ntawm kev sib txuas thiab kev sib zog ua kom tiav, tsis muaj sijhawm txaus, lub siab thiab ntim los sau cov pwm kab noj hniav nrog cov yaj.

② Lub sij hawm cia ntawm SMC cov khoom siv molding yog ntev dhau lawm, thiab cov styrene volatilizes ntau dhau, ua rau muaj qhov txo qis hauv cov khoom ntws ntawm SMC cov khoom siv molding.

③ Cov tshuaj nplaum nplaum tsis yog tsau rau hauv fiber ntau. Cov tshuaj nplaum tsis tuaj yeem tsav cov fiber ntau ntws thaum molding, ua rau cov khoom tsis txaus. Rau qhov tsis txaus ntawm cov ntaub ntawv los ntawm cov laj thawj saum toj no, cov kev daws teeb meem ncaj qha tshaj plaws yog tshem tawm cov khoom molded no thaum txiav cov khoom.

④ Kev pub mis tsis txaus ua rau cov khoom tsis txaus. Txoj kev daws teeb meem yog txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm, nws txoj kev txiav yog txiav.

⑤ Muaj huab cua ntau dhau thiab muaj cov teeb meem tsis sib haum xeeb hauv cov khoom molding. Txoj kev daws teeb meem yog kom tsim nyog nce tus naj npawb ntawm cov vents; tsim nyog nce qhov chaw pub mis kom ntxuav cov pwm ntawm ib lub sijhawm; tsim nyog nce lub siab molding.

⑥ Lub siab yog lig dhau lawm, thiab cov khoom siv molded tau ua tiav kev sib txuas thiab kho ua ntej sau cov pwm kab noj hniav.

⑦ Yog tias pwm kub siab dhau lawm, qhov sib txuas sib txuas thiab kho cov tshuaj tiv thaiv yuav ua ntej, yog li qhov kub thiab txias yuav tsum tau qis qis.

(2) Stoma

Muaj qhov tsis tu ncua lossis tsis xwm yeem me me rau ntawm qhov chaw ntawm cov khoom, feem ntau yog tsim nyob rau sab saum toj thiab nruab nrab nyias phab ntsa ntawm cov khoom. Generation mechanism thiab countermeasures:

① SMC cov khoom sib xyaw yog qhwv hauv cov huab cua ntau thiab muaj cov ntsiab lus tsis zoo, thiab cov pa tawm tsis zoo; Cov nyhuv thickening ntawm SMC cov khoom tsis zoo, thiab cov roj tsis tuaj yeem raug tsav tawm zoo. Cov laj thawj saum toj no tuaj yeem tswj tau zoo los ntawm kev sib xyaw ua ke ntawm kev ua kom cov vents thiab ntxuav cov pwm.

② Yog tias qhov chaw pub mis loj dhau lawm, nws tuaj yeem tswj tau los ntawm kev txo qhov chaw pub mis kom tsim nyog. Hauv cov txheej txheem ua haujlwm tiag tiag, tib neeg yam tseem ceeb kuj tuaj yeem ua rau mob trachoma. Piv txwv li, yog hais tias lub pressurization yog ntxov dhau, nws yuav nyuaj rau cov roj qhwv hauv cov molding compound yuav tsum tau tawm, uas ua rau deg tsis xws luag xws li pores nyob rau saum npoo ntawm cov khoom.

(3) Warpage deformation

Qhov laj thawj tseem ceeb yog qhov tsis sib xws ntawm cov molding compound thiab shrinkage ntawm cov khoom tom qab demolding. Generation mechanism thiab countermeasures:

Thaum lub sij hawm kho cov tshuaj tiv thaiv ntawm cov resin, cov qauv tshuaj hloov, ua rau lub ntim shrinkage, thiab qhov tsis sib xws curing ua rau cov khoom zoo li warp mus rau thawj kho. Qhov thib ob, qhov thermal expansion coefficient ntawm cov khoom yog loj dua li ntawm cov hlau pwm. Thaum cov khoom yog txias, nws ib-txoj kev shrinkage tus nqi yog ntau tshaj ib-txoj kev tshav kub shrinkage tus nqi ntawm pwm. Vim li no, cov hauv qab no yog siv los daws qhov teeb meem