Nyob rau hauv cov txheej txheem ntawm kev kawm cov khoom yas txhaj tshuaj yas, kev txhaj tshuaj moulding, feem ntau ntawm cov yas tau sau rau hauv cov pwm, feem ntau 90% rau 99.9% ntawm tag nrho cov khoom ntim; Hauv theem ob, cov khoom lag luam tau cog tau kom tau txais cov khoom lag luam nrog tib cov qauv thiab tsos uas yog pwm. Nyob rau theem ob, txawm hais tias tsuas yog ib qho me me ntawm cov yas yaj tau sau rau saum npoo, nws yog qhov tsos thiab khoom loj ntawm cov khoom. Feem ntau, theem ob ntawm kev txhaj tshuaj molding siv ob qhov ntsuas: siab thiab sijhawm.
Los ntawm cov kev xav ntawm kev tshawb fawb molding molding, peb nce ob yam rau plaub lub ntsiab: (1) txoj kev hloov pauv ntawm thawj theem mus rau theem ob; (2) Ua kom lub vag kaw (khov) lossis lub rooj vag unsealed thaum ua cov khoom; (3) Lub sijhawm tuav; (4) Tswj lub siab tsim nyog nyob rau hauv cov kab noj hniav.
Kev los ntseeg
Nws tuaj yeem hais tias kev tswj hwm ntawm kev hloov dua siab tshiab los ntawm thawj theem mus rau theem ob yog qhov tseem ceeb tshaj plaws ntawm cov txheej txheem moulding. Seb cov khoom lag luam zoo tuaj yeem ua tiav txhua zaus nyob ntawm qhov no, thiab nws feem ntau yog vim li cas yas ua nroj tsuag tsis tuaj yeem tsim cov khoom qub los ntawm ib qho khoom siv mus rau lwm tus.
Hauv cov ntawv thov feem ntau, cov txheej txheem hloov dua siab tshiab yuav tsum tau, uas yog qhov kev cia siab ntawm thawj theem yog, nws tuaj yeem hloov kho tam sim no rau cov kab ke thiab tuav siab nyob rau theem ob Cov. Ib qho ntxiv, koj yuav tsum nkag siab tias cov cuab yeej tswj cov khoom siv tau ua tiav txoj kev hloov dua siab tshiab no.
Hmoov tsis zoo, tsis muaj neeg sib koom tes ua raws li kev sib cais ntawm cov khoom siv sib txawv ntawm cov khoom siv sib txawv
① Cov khoom siv ua tau yog nruab nrog kev hloov dua siab tshiab ua haujlwm kom tswj lub viscosity;
② Chav tswj cov khoom siv muaj lub viscosity teeb tus nqi rau kev hloov pauv ntawm kev hloov dua siab tshiab, tab sis tsis tuaj yeem tswj hwm nws;
Cov khoom siv tsis muaj viscosity teeb tsa tus nqi rau kev hloov dua siab tshiab;
④ Thaum thawj theem hloov pauv mus rau theem ob, cov cuab yeej siv tsis tuaj yeem ua haujlwm ib txwm, thiab maj mam qaij qaij, poob lossis nthwv dej.
Nws yog ib qho tsim nyog los xyuas kom meej tias hloov dua siab tshiab los ntawm thawj theem mus rau theem ob yog nrawm thiab xwm yeem. Yog li, nkag siab lub hauv paus kev ua haujlwm ntawm kev txhaj tshuaj molding tshuab yog qhov tseem ceeb kom tau txais cov txiaj ntsig xav tau. Rau cov khoom lag luam feem ntau, rau kev tsim kho kom raug, lub sijhawm los ntawm qhov kawg ntawm theem theem ob siab teeb tsa yuav tsum tau tsawg dua 0. 1 vib nas this. 1 vib nas this. 1 vib nas this.
Nws tsis yog ntshaw kom muaj tej yam dab dej, nyias thiab ntse thiab qeeb qeeb rau hauv theem thib ob siab tshwm sim thaum hloov mus rau theem ob siab. Sining tuaj yeem ua rau cov dej ntws mus rau pem hauv ntej kom ua siab deb, ua rau muaj kev tiv thaiv lossis kev tshaib plab. Nyias peaks lossis hloov qeeb rau theem theem ob siab yuav ua rau cov kab noj hniav ntau dua, ua rau muaj teeb meem. Kev viav vias feem ntau ua rau muaj kev tsis ruaj khov. Lub Siab Saib Xyuas Teeb Meem txav tau lub sijhawm tuaj yeem siv los ntsuas txoj hauv kev los ntsuas cov lus teb zoo tshaj plaws ntawm lub tshuab.
Nws tsis tuaj yeem ua txhua qhov chaw nrog lub rooj vag kaw. Rau qhov tshwj xeeb, kev kuaj lub rooj vag yuav tsum tau ua thiab cov khoom ua tiav nrog lub rooj vag kaw thiab ua tiav yam tsis muaj lub laj thawj los txiav txim seb hom twg yog qhov zoo tshaj. Tej zaum nws yuav ua tau rau 100% ntawm cov qauv xeem kom swb thaum lub rooj vag khov, thiab 100% ntawm cov chaw nrog lub rooj vag tsis khov, lossis rov ua dua. Nws tsis muaj peev xwm qhia dab tsi yog mus los ntawm tsuas yog saib cov qauv lossis cov txheej txheem. Ua tau ib lub pas tswv rooj zaum kuaj thiab kuaj cov qauv yuav pom cov lus teb.
Teeb tsa lub sijhawm
Kev paub seb lub qhov rooj yuav tsum tau khaws cia lossis qhib tuaj yeem pab teeb tsa qhov ntev ntawm theem ob. Yog tias lub rooj vag lub sijhawm yuav tsum muaj, tom qab ntawd ntxiv theem ob lossis teeb lub sijhawm lub rooj zaum nrawm dua rau cov txheej txheem los tswj lub zog thiab kev ruaj khov. Qhov no tsis tas yuav tsum tau nce qib li, raws li feem ntau cov chaw ib puag ncig tuaj yeem txo lub sijhawm txias lossis siv lub sijhawm sib khi. Yog tias qhov kev ua tau zoo ntawm ib feem yog qhov zoo nrog lub rooj vag uas tsis tau npaj tseg, pib ua kom txias lub rooj vag ntawm ib nrab lub sijhawm xav tau.
Vim tias qhov kub thiab kub ua ntau yam kev hloov pauv, qhov xwm txheej phem tshaj yog xaiv lub rooj vag ncaj qha. Txawm li cas los xij, qee zaum nws yog ib qho tsim nyog yuav tsum muab cov rooj vag thaum ua ib feem, thiab qee zaum nws tsis yog, uas yuav tsim cov ntu tsis sib xws.
Ib txoj kev cuam tshuam yog: yog tias lub rooj loog tsis tau muab ntim rau thaum ua, ces kev sib xws ntawm lub sijhawm voj voog ua qhov tseem ceeb heev rau cov khoom lag luam zoo tib yam. Yog tias lub sijhawm voj voog sib txawv nrog lub rooj vag unsealed, ib feem tseem yuav txawv vim qhov pauv ntawm cov polymer hauv kab noj hniav. Qhov hnyav ntawm lub sijhawm tuaj yeem tshawb xyuas qhov no.
Teeb tsa lub siab tuav
Nrhiav qhov tseeb tuav tau yog qhov tseem ceeb los cog lus ib feem. Qhov tseeb lub siab nyob rau theem theem ob yuav tsum nyob hauv thiab ntawm qhov chaw ntawm cov khoom parameter khwv tau kom tau txais ib qho zoo CPK (txheej txheem CPK (txheej txheem CPK (txheej txheem capility. Txij li thaum tuav lub siab yog teeb nyob rau hauv lub rooj vag kev sim ntsuas, qhov tseeb qhov kev sim siab thib ob yuav tsum tau pom los ntawm kev sim ua qhov chaw ua haujlwm ntawm kev ua cov khoom lag luam ua ntu zus.
Ua ntej tshaj, xyuas qhov ruaj ntseg ntawm thawj theem thiab tshawb xyuas seb puas muaj kev txiav txim siab lossis ib feem shrinkage tom qab thawj theem. Kuaj cov txheej txheem: Cia sij hawm rau theem ob thiab txo cov kev tuav lub zog rau tus nqi qis tshaj plaws rau tus neeg tuav lub siab lossis tuav lub sijhawm mus rau xoom. Yog tias thawj theem nyias txawv ntawm qhov kev cia siab, khaws thawj theem tsis hloov pauv. Yog tias tsis muaj kev nqis tes ua nyob rau theem ob, nws yuav ua rau thawj theem mus yuam kev.
Yog tias thawj theem yog ruaj khov, tom qab pib nce kev tuav siab. Pib tsawg, tej zaum tsuas 1000-2000 psi rau plastics. Txheeb xyuas cov seem txhua lub sijhawm tuav lub siab yog nce; Nce cov kev tuav lub zog hauv cov nce me me kom txog thaum qhov zoo ntawm cov feem raug txiav txim los ua lub xeev zoo tshaj plaws. Tsim ib qho ntawm cov tshooj uas lawv xav tau kev ua tau zoo ua ntej. Daim ntawv lo thiab muab tso tseg.
Tam sim no txuas ntxiv ua kom muaj kev cia siab kom txog thaum cov khoom siv tsis tau, thawb cov teeb meem kev puas tsuaj, lossis lwm yam teeb meem uas tus txheej txheem ua haujlwm tsis tuaj yeem ua haujlwm hauv cov txheej txheem siab. Txo lub siab mus rau qhov nyiaj siab tshaj plaws uas tau tso cai los ntawm cov txheej txheem pub nyab xeeb thiab muaj txiaj ntsig zoo. Tsis tas li ntawd, txheej txheem ib pawg ntawm seem rau kev tshuaj xyuas ua ntej zoo. Daim ntawv lo thiab muab tso tseg. Thaum kawg, tsim cov pab pawg ntawm qhov nruab nrab ntawm nruab nrab ntawm cov kev sib tw siab tsuas yog teem.
Siv peb pawg ntawm qhov chaw thiab ua cov haujlwm tswj hwm zoo. Siv cov ntaub ntawv tsim los ntawm kev tswj hwm zoo los txiav txim siab seb cov pab pawg ntawm cov chaw tsis tsim nyog lossis siv tau.
Muaj peb lo lus teb:
(1) Txhua ntu yog loj heev. Qhov no qhia tau ib qho tsis ua haujlwm vim tias nws qhia tias qhov tsis raug Shrinkage tau siv los laij cov kab noj hniav loj. Yog tias lawv nyob sab nraum lub siab sab saud thiab qis dua ntawm cov siab, tom qab ntawd cov txheej txheem hloov pauv yuav muaj qhov nyuaj tau txais cov seem mus rau qhov uas yuav tsum tau.
(2) Txhua ntu yog tsawg heev. Qhov no tseem tsis zoo xov xwm, tab sis tsawg kawg nws yog "pwm nyab xeeb" thiab tuaj yeem hloov kho kom tau cov seem mus rau cov seem. Xwb, nws yuav nyuaj rau hloov cov txheej txheem kom tau cov seem rov qab mus rau qhov chaw ntawm qhov yuav tsum tau ua.
(3) Qee ntu tsis muaj tsawg thiab qee qhov loj heev. Tam sim no koj tuaj yeem siv cov ntaub ntawv tau los tsim kom muaj qhov tsawg kawg nkaus ntawm qaum thiab qis ntawm tus doe (tsim kev sim). Tsis pub dhau ntawm cov chaw tau txais ntau yam, siv theem theem ob siab sim los txiav txim siab ntawm qhov chaw uas yuav tsum tau muaj.
