◆Sprue khoom (khiav sprue) lo rau pwm thiab kev daws teeb meem
Ntau lub suab nrov thaum plasticizing thiab nws cov kev daws teeb meem:
Plasticizing suab nrov yog hais txog "squeaking" los yog "crunching" kev sib txhuam suab uas tsim nyob rau hauv lub chim thaum lub sij hawm.txhaj tshuaj moldingThaum cov ntsia hlau tig thiab plasticizes cov khoom (lub suab nrov no tau tshaj tawm thaum plasticizing siab -viscosity PMMA thiab PC cov ntaub ntawv).
Ntau lub suab nrov thaum plasticizing feem ntau yog tshwm sim los ntawm kev sib hloov ntawm cov ntsia hlau ntau dhau, ua rau muaj zog qhuav kev sib txhuam ntawm cov ntsia hlau thiab cov khoom siv yas hauv qhov compression thiab pub mis. Qhov ua rau thiab kev daws teeb meem rau qhov tshwm sim no tau qhia hauv cov lus hauv qab no.
Ua rau thiab cov kev daws teeb meem rau lub suab nrov dhau thaum plasticizing
| Ua rau Analysis | Kev daws teeb meem |
|---|---|
| ① Siab rov qab ntau dhau | ① Txo rov qab siab |
| ② Screw ceev heev | ② Txo cov ntsia hlau ceev |
| ③ Barrel (compression section) kub qis heev | ③ Ua kom kub ntawm qhov compression seem |
| ④ Yas viscosity siab dhau lawm (tsis zoo flowability) | ④ Hloov mus rau cov yas uas muaj dej ntws zoo dua |
| ⑤ Txo tus kheej -lubricating khoom ntawm cov resin | ⑤ Ntxiv cov roj nplua nyeem (xws li stearic acid, talc) rau cov khoom siv raw |
| ⑥ Screw compression ratio tsawg dhau | ⑥ Hloov nrog cov ntsia hlau uas muaj qhov sib piv loj dua |
Screw slippage thiab kev daws teeb meem
Thaum lub sij hawm txhaj tshuaj molding, qhov tshwm sim qhov twg cov ntsia hlau tsis ua rau cov khoom siv raw thiab tsuas yog tig tsis tau txav yog hu ua ntsia hlau slippage. Thaum cov ntsia hlau slippage tshwm sim, cov ntsia hlau tsuas yog tig thiab tsis thim rov qab. Qhov ua rau thiab kev daws teeb meem rau qhov tshwm sim no tau qhia hauv cov lus hauv qab no.
Ua rau thiab kev daws teeb meem rau cov ntsia hlau slippage
| Ua rau Analysis | Kev daws teeb meem |
|---|---|
| ① Kub kub nyob tom qab ntawm lub thoob, cov khoom melts thiab xaus (tsis tag nrho melted) | ① Txias lub caj pas nrog dej txias; qis dua rear chim kub |
| ② Qhuav cov khoom tsis txaus | ② Qhuav cov khoom kom huv si thiab ntxiv roj nplua nyeem yog tias tsim nyog |
| ③ Ntau lub zog rov qab, ntsia hlau nrawm dhau (screw slips) | ③ Txo lub siab rov qab thiab txo cov ntsia hlau ceev |
| ④ High resin viscosity nyob rau hauv lub thoob (cov ntaub ntawv tsis tag nrho melted) | ④ Kho / hloov cov kav dej kub; hloov nrog cov khoom tshiab |
| ⑤ Ntau cov khoom siv rov ua dua tshiab hauv qhov chaw nres nkoj pub, ua rau "bridging" tshwm sim | ⑤ Ua kom qhov loj ntawm qhov chaw nres nkoj pub hopper; re-pulverize cov khoom siv dua |
| ⑥ Cov khoom tsis txaus hauv lub thoob | ⑥ Pub cov khoom nyob rau hauv lub sij hawm thiab ntxiv cov khoom tsis tu ncua |
| ⑦ Hnav hnyav rau ntawm lub taub hau thiab cov ntsia hlau | ⑦ Tshawb xyuas thiab hloov lub thoob / ntsia hlau |
Nozzle clogging thiab daws
Thaum lub sij hawm txhaj tshuaj molding, qhov tshwm sim uas cov yaj tsis tuaj yeem nkag mus rau hauv cov pwm khiav yog hu ua nozzle blockage. Qhov ua rau thiab kev daws teeb meem rau qhov tshwm sim no tau qhia hauv cov lus hauv qab no.
Ua rau thiab kev daws teeb meem rau nozzle clogging
| Ua rau Analysis | Kev daws teeb meem |
|---|---|
| ① Muaj cov hlau lossis lwm yam uas tsis yog{0}} cov khoom txawv teb chaws meltable nyob rau hauv lub nozzle | ① Dismantle thiab ntxuav lub nozzle; tshem tawm cov khoom txawv teb chaws hauv lub nozzle |
| ② Mixed hlau hais nyob rau hauv qhov chaw nres nkoj pub | ② Tshawb xyuas / ntxuav cov khoom hlau los ntawm lub hopper; Hloov cov khoom noj (siv cov khoom centrifugal sorting yog tias tsim nyog) |
| ③ Kev ziab tsis txaus ntawm cov khoom hauv qhov chaw nres nkoj pub | ③ Qhuav cov khoom nyob rau hauv lub hopper kom huv si ua ntej pub |
| ④ High melting point yas sib xyaw hauv lub hopper | ④ Tshem tawm cov yas siab melting point ntawm lub hopper |
| ⑤ Crystallizing resins (piv txwv li, PA, PBT) nrog cov dej noo rhiab heev | ⑤ Ua kom ziab kom qhuav |
| ⑥ Cov kab hluav taws xob puas lossis tawg ntawm lub nozzle | ⑥ Hloov cov kab hluav taws xob puas / tawg |
| ⑦ Muaj ob peb lub nozzle cua sov cheeb tsam | ⑦ Ua kom tus naj npawb ntawm qhov chaw cua sov nozzle |
| ⑧ Nozzle tsis ntsia nrog cov lim hlau nplaum | ⑧ Nruab cov lim hlau nplaum ntawm lub nozzle |
Nozzle drooling thiab daws
Lub phenomenon ntawm yaj ntws tawm ntawm lub nozzle thaum lub sij hawm plasticizing yog hu ua nozzle drooling. Hauv kev sib cuag kev txhaj tshuaj molding, yog tias lub nozzle drooling tshwm sim, cov yaj ntws mus rau hauv lub ntsiab khiav, thiab cov yas txias tuaj yeem cuam tshuam qhov kev vam meej ntawm kev txhaj tshuaj molding (clogging lub rooj vag los yog khiav) los yog ua rau cov tsos mob ntawm qhov chaw ntawm cov yas (xws li chaw txias, shrinkage, shortness ntawm cov khoom, thiab lwm yam). Qhov no yog qhov tseeb tshwj xeeb tshaj yog rau cov yas uas muaj cov khoom ntws zoo, xws li cov ntaub ntawv PA, uas yog qhov yooj yim rau lub nozzle drooling. Qhov ua rau thiab cov kev daws teeb meem rau nozzle drooling muaj nyob rau hauv cov lus hauv qab no.
Ua rau thiab kev daws teeb meem rau drooling
| Ua rau Analysis | Kev daws teeb meem |
|---|---|
| ① Cov khoom kub lossis lub thoob kub kub heev | ① Txo qhov kub thiab txias ntawm lub taub hau |
| ② Siab rov qab los yog ntsia hlau ceev heev | ② Txo rov qab siab los yog qis dua cov ntsia hlau ceev |
| ③ Tsis txaus txhaj tshuaj ntim (cov ntaub ntawv nyob twj ywm ntev dhau lawm) | ③ Ua kom lub ntim ntim (tsawg lub sijhawm nyob hauv) |
| ④ Ntau dhau qhov kub ntawm lub nozzle lossis cua sov tsis sib xws | ④ Siv me me - lub taub hau taub hau lossis hloov nrog tus kheej - lub taub hau ntxuav |
| ⑤ Ntau qhov ceev ceev | ⑤ Txo cov ntsia hlau ceev |
| ⑥ Kev teeb tsa siab rov qab | ⑥ Hloov mus rau ntau- theem rov qab siab lossis qis rov qab siab |
Nozzle kua nplaum to thiab daws
Thaum lub sij hawm txhaj tshuaj molding, qhov tshwm sim ntawm kub molten yas ntws tawm ntawm lub taub hau nozzle los yog kev sib txuas ntawm nozzle xov thiab lub thoob yog hu ua nozzle to. Nozzle to tuaj yeem cuam tshuam rau kev ua haujlwm ntawm kev txhaj tshuaj molding. Hauv cov menyuam yaus, nws tuaj yeem ua rau tsis sib xws ntawm cov khoom hnyav lossis qhov zoo; Nyob rau hauv cov xwm txheej hnyav, nws tuaj yeem ua rau shrinkage, cov khoom tsis txaus, thiab cov cua kub kub kub, yog li cuam tshuam rau cov khoom zoo li. Qhov ua rau thiab cov kev daws teeb meem rau lub nozzle leakage yog qhia hauv cov lus hauv qab no.
Ua rau thiab kev daws teeb meem rau nozzle kua nplaum
| Ua rau Analysis | Kev daws teeb meem |
|---|---|
| ① Tsis zoo fusion ntawm melt fronts los ntawm nozzle thiab pwm | ① Siv nozzle thiab pwm accessories nrog zoo compatibility |
| ② Cov pob txha tawg lossis cov cim ntws los ntawm lub nozzle | ② Hloov lub nozzle los yog hloov mus rau lwm hom nozzle |
| ③ Ntau lub zog rov qab los yog ntsia hlau ceev heev | ③ Txo rov qab siab los yog qis dua cov ntsia hlau ceev |
| ④ Cov kub kub los yog lub taub hau kub qis heev (tsis tshua muaj fluidity) | ④ Txo qis rov qab siab thiab nce kub |
| ⑤ Kev txhaj tshuaj qeeb qeeb | ⑤ Siv ntau-theem txhaj tshuaj thiab ua kom nrawm |
| ⑥ Ntau lub sij hawm ntsia hlau rau pem hauv ntej (FMI tuav siab dhau lawm) | ⑥ Siv ntau-theem tuav siab lossis txo tuav lub siab |
Khoom lo rau pwm thiab kev daws teeb meem
Ua rau thiab kev daws teeb meem rau cov khoom uas ua rau cov pwm pem hauv ntej
| Ua rau Analysis | Kev daws teeb meem |
|---|---|
| ① Tsawg clamping quab yuam (pwm tsis kaw tag nrho, tsis zoo rigidity, los yog deformation hauv pwm kab noj hniav) | ① Nce clamping quab yuam |
| ② Kev txhaj tshuaj ntau dhau lossis tuav lub siab | ② Txo kev txhaj tshuaj los yog tuav lub siab |
| ③ Lub sijhawm tuav ntev dhau | ③ Txo lub sijhawm tuav |
| ④ Kev ceev heev kawg - theem txhaj ceev | ④ Txo qhov kawg - theem txhaj ceev |
| ⑤ Cov khoom siv kub tsis txaus lossis lub sijhawm txias | ⑤ Txo cov khoom kub los yog ncua sij hawm txias |
| ⑥ Melt kub siab dhau lossis qis dhau | ⑥ Kho qhov kub thiab txias thiab txo qhov kub hloov pauv |
| ⑦ Cov khoom noj tsis sib xws lossis ntau dhau ntawm ib lub voj voog | ⑦ Hloov lub rooj vag txoj hauj lwm los yog txo lub rooj vag loj |
| ⑧ Moulding tej yam kev mob nrog rau pem hauv ntej pwm kub siab tshaj rear pwm kub | ⑧ Tshawb xyuas thiab kho pwm; clear trapped huab cua |
| ⑨ Tsis zoo precision lossis burrs ntawm pwm parting nto | ⑨ Kho pwm lossis polish / kho qhov chaw |
| ⑩ Pem hauv ntej / nraub qaum pwm nto tiav lossis muaj khawb | ⑩ Polish pwm los yog re-coat pwm nto |
| ⑪ Ntau dhau los yog me me pwm qhov sib txawv | ⑪ Txhim kho qhov sib txawv thickness |
| ⑫ Lub tshuab nqus tsev kub ntau dhau (muaj zog nqus) | ⑫ Txuas lub sij hawm txias los yog hloov txoj kev txias |
| ⑬ Cov pwm qhib nrawm nrawm thaum pib | ⑬ Txo qhov pib pwm qhib ceev |