Hauv kev txhaj tshuaj molding ntau lawm, peb feem ntau pom cov xwm txheej zoo li no: lub sijhawm kawg ntawm kev txhaj tshuaj molding tau ua tiav zoo, cov txheej txheem tsis raug kaw thiab ua rau hauv daim ntawv txheej txheem, thiab lub sijhawm tom ntej ntawm kev tsim khoom tau pib, cov txheej txheem ntawm qhov kawg. lub sij hawm raug nias, tab sis cov txheej txheem yuav ua tsis tau zoo. Cov khoom?
Rau qhov tshwm sim no, qee cov npoj yaig tau hais tias lub tshuab txhaj tshuaj molding tsis ruaj khov;
Yog li, yog vim li cas tiag? Puas yog daim npav khoom siv tes ua muaj qhov tseem ceeb hauv kev taw qhia?
Lo lus nug no yog tus sawv cev, cia peb ua qee qhov kev soj ntsuam ntawm no
Ua ntej tshaj plaws, kev ruaj ntseg ntawm kev txhaj tshuaj molding tshuab, suav nrog kev tswj kev mob stroke, kev tswj qhov kub thiab txias yog qhov yuav tsum tau xav txog. Yog li, qhov no yog vim li cas lub tshuab txhaj tshuaj molding yuav tsum tau kuaj xyuas thiab ntsuas txhua hnub.
Tab sis txawm tias muaj cov tshuab txhaj tshuaj molding tshuab zoo tshaj plaws, qhov no tshwm sim, qhia tias qhov tseeb ntawm kev txhaj tshuaj molding tshuab tsis yog tib yam, muaj lwm yam laj thawj.
Yog vim li cas yog tias muaj kev nkag siab yuam kev: lub teeb pwm kub yog suav tias yog qhov tseeb pwm kub.
Nyob rau hauv cov txheej txheem txhaj tshuaj molding, cov pwm yog lub tshav kub exchanger. Cov yas yaj coj cov cua sov kom nce qhov kub ntawm pwm; cov dej txias yuav tshem tawm cov cua sov kom txo tau qhov kub ntawm cov pwm (ntawm chav kawm, cua sov conduction thiab hluav taws xob hluav taws xob). Yog li ntawd, cov pwm kub kuj yuav hloov pauv nyob rau hauv ib qho chaw.
Daim duab hauv qab no yog qhov kub thiab txias hloov nkhaus ntawm pwm kab noj hniav thaum lub sij hawm txhaj tshuaj molding txheej txheem. Nws tuaj yeem muab faib ua ob ntu, ib qho yog qhov nruab nrab qhov ntsuas kub thiab lwm qhov yog qhov ntsuas kub hloov pauv.
duab
Nws tuaj yeem pom los ntawm daim duab uas nyob rau theem pib ntawm kev txhaj tshuaj molding, qhov kub thiab txias ntawm cov pwm kab noj hniav maj mam nce nrog lub sijhawm (lossis tus naj npawb ntawm kev txhaj tshuaj). Tom qab qee lub voj voog ntau lawm, qhov kub ntawm qhov chaw ntawm kab noj hniav yuav ncav cuag tus txheeb ze macroscopically. Tus nqi ruaj khov, microscopically qhia kev hloov pauv raws sijhawm. Vim tias thaum txhaj tshuaj molding ntau lawm nkag mus rau theem ruaj khov, cov cua sov hloov mus rau cov yaj yog qhov pib zoo ib yam li cov cua sov tshem tawm los ntawm cov pwm txias, thiab cov pwm kub zoo li ruaj khov.
Txij li thaum lub tshav kub coj los ntawm cov yas yaj thaum lub sij hawm txhaj tshuaj molding txheej txheem yog sib quas ntus, qhov kub ntawm qhov chaw ntawm lub kab noj hniav hloov nrog lub sij hawm ntawm kev txhaj tshuaj molding voj voog, yog li lub nkhaus yog microscopically zigzag.
Qhov kev hloov pauv hauv daim duab kuj qhia tau hais tias qhov hloov pauv ntawm cov pwm kub yog qhov loj ntawm qhov pib ntawm kev tsim khoom, thiab raws li cov khoom lag luam nce ntxiv, tus nqi hloov pauv maj mam txo, thiab thaum kawg tus nqi hloov pauv yuav ruaj khov. Qhov me me ntawm tus nqi hloov pauv, qhov ruaj khov ntawm pwm qhov kub thiab qhov zoo dua qhov rov ua dua ntawm kev txhaj tshuaj molding.
Peb cov txheej txheem kev txhaj tshuaj molding feem ntau yog ua tom qab txhaj tshuaj molding nkag mus rau hauv lub xeev ruaj khov, tab sis txawm tias qhov ntsuas no tau siv rau thawj theem ntawm kev txhaj tshuaj molding, cov khoom zoo feem ntau tsis tau txais. Qhov tseem ceeb tshaj plaws yog qhov kub ntawm pwm ntawm thawj theem ntawm kev txhaj tshuaj molding tsis siab npaum li qhov nyob hauv lub xeev ruaj khov. . Yog li ntawd, feem ntau muaj qhov tsis xws li cov kua nplaum tsis txaus, shrinkage, thiab cov kab dej pom tseeb.
Yog tias cov txheej txheem tsis raug kho, xws li nce qhov kev txhaj tshuaj siab, ceev lossis nce cov khoom kub, cov khoom zoo tuaj yeem tau txais thaum xub thawj, tab sis raws li kev tsim tawm, tom qab lub sijhawm pwm kub nce mus txog lub xeev ruaj khov, thiab pem hauv ntej yuav tshwm dua. , Sab saum toj dawb thiab lwm yam overfilling phenomena. Lub sijhawm no, cov txheej txheem tsis nyob hauv lub xeev khov kho tau siv dua.
Yog li ntawd, nyob rau theem pib ntawm kev txhaj tshuaj molding, nws yog qhov tseeb los kho qhov tsis zoo ntawm daim npav thawj txheej txheem kom tsim nyog, thiab nws kuj yog qhov tseeb kom rov qab mus rau qhov qub txhaj tshuaj molding tsis tau thaum txhaj tshuaj molding nkag mus rau hauv lub xeev ruaj khov. Qhov no yog vim lub xeev sib txawv ntawm pwm kub thaum lub sij hawm txhaj tshuaj molding txheej txheem. vim.
Thov nco ntsoov tias qhov no yog ib qho kev kho, tsis yog kev rhuav tshem tag nrho, thiab qhov kev taw qhia tseem ceeb ntawm cov khoom siv tes ua daim npav swapping tshuab tsis tuaj yeem raug kho tsis zoo vim tias muaj qhov sib txawv.
