1. Siab
Qhov kev txiav txim siab muab los ntawm lub tshuab siab (roj twj tso kua mis) lossis servo lub cev muaj zog ntawm lub tshuab txhaj tshuaj molding yog tsuas yog siv rau hauv ntau yam txheej txheem xws li kev txhaj tshuaj, khoom siv yaj, pwm qhib thiab kaw lub cuab yeej, ejection ntaus ntawv, txhaj tshuaj lub rooj ntaus ntawv, thiab cov tub ntxhais. rub ntaus ntawv. Tom qab cov tswj vaj huam sib luag ntawm lub tshuab txhaj tshuaj molding inputs cov tsis muaj feem xyuam, lub processor hloov lawv mus rau hauv cov teeb liab rau txhua qhov kev ua haujlwm, yog li tswj lub siab xav tau rau kev ua tiav ntawm txhua qhov kev ua haujlwm.
Lub hauv paus ntsiab lus ntawm kev teeb tsa siab yog: qhov sib thooj lub zog kom kov yeej qhov kev tawm tsam ntawm qhov kev txiav txim, tab sis tus nqi parameter yuav tsum tau kho kom haum raws li qhov nrawm ntawm qhov kev txiav txim.
2. Ceev
Koom tes nrog lub siab saum toj no los ua kom tiav qhov kev ua haujlwm ceev (qhov ntws ntawm qhov system hydraulic roj) ntawm txhua qhov kev ua haujlwm. Cov theem pib ceev tau muab faib ua: qeeb ntws 0.1-10, qeeb ceev 11-30, nruab nrab ceev 31-60, thiab kev kub ceev 61-99.
1. Kev tswj kev txhaj tshuaj nrawm yog siv rau cov khoom sib txawv thiab cov khoom siv los teeb tsa qhov loj me. Peb yuav tsis paub qhov txawv ntawm no (engineering/general plastics, crystalline/amorphous plastics, high-temperature/low-temperature plastics, soft/hard plastics) Nws yog ib qho yooj yim rau confuse neeg. Txhawm rau muab cov lus piav qhia yooj yim dua, kev txhaj tshuaj nrawm yog cov txheej txheem uas nyuaj rau kev tswj hwm hauv kev txhaj tshuaj molding. Tsis zoo li lwm cov txheej txheem txheej txheem, muaj cov ntaub ntawv txheem rau kev siv (yuav tsum qhia kom meej tom qab).
Tus lej teeb tsa ntawm kev txhaj tshuaj nrawm feem ntau ua raws cov ntsiab lus hauv qab no:
Nyob ntawm qhov fluidity ntawm cov khoom; Cov yas mos xws li PP, LDPE, TPE, TPR, TPU, PVC thiab lwm yam yas mos muaj fluidity zoo thiab muaj kab noj me me thaum txhaws. Feem ntau, kev txhaj tshuaj qis dua tuaj yeem siv rau kev sau. Cavity. Feem ntau siv cov khoom nruab nrab-viscosity xws li ABS, HIPS, GPPS, POM, PMMA, PC + ABS, Q kua nplaum, K kua nplaum, HDPE, thiab lwm yam. Thaum cov khoom zoo li gloss tsis tas yuav tsum tau los yog cov khoom thickness yog nruab nrab (cov khoom Thaum cov phab ntsa thickness los yog pob txha thickness mus txog 1.5MM los yog ntau tshaj), cov txhaj tshuaj ceev yuav tsum tau sau nyob rau hauv nruab nrab ceev. Txwv tsis pub, lub filling ceev yuav tsum tau nce kom tsim nyog raws li cov qauv khoom lossis cov kev xav tau zoo.
Engineering plastics xws li PC, PA + GF, PBT + GF, LCP muaj cov dej tsis zoo thiab feem ntau yuav tsum tau txhaj tshuaj ceev thaum lub sij hawm txhaws, tshwj xeeb tshaj yog cov khoom siv ntxiv GF (iav fiber ntau). Yog tias qhov kev txhaj tshuaj nrawm dhau lawm, qhov chaw ntawm cov khoom yuav puas. Floating fiber (silver streak on the deg) yog qhov hnyav.
2. Kev tswj ntawm melting ceev;
Qhov kev ntsuas no yog ib qho ntawm cov txheej txheem yooj yim tshaj plaws hauv kev ua haujlwm txhua hnub, vim tias feem ntau cov npoj yaig ntseeg tias cov txheej txheem no muaj kev cuam tshuam me ntsis ntawm molding, thiab cov khoom tuaj yeem tsim los ntawm kev kho qhov tsis zoo ntawm qhov yuav. Txawm li cas los xij, hauv kev txhaj tshuaj molding, cov txheej txheem yaj yog tib yam li cov txheej txheem txhaj tshuaj molding. Cov kua nplaum ceev yog qhov tseem ceeb sib npaug. Lub melting ceev tuaj yeem cuam tshuam ncaj qha rau lub melting nyhuv, molding voj voog thiab lwm yam tseem ceeb txuas.
3. Tswj pwm qhib thiab xauv nrawm;
Teeb tsa qhov sib txawv tsuas yog rau cov qauv pwm sib txawv, xws li kho cov pwm nrawm nrawm ua ntej pib qis pwm clamping siab rau ob lub phaj tiaj pwm thiab kho kom nrawm pwm qhib tom qab cov khoom tawm ntawm pwm kab noj hniav tuaj yeem txhim kho kev ua haujlwm zoo. Txawm li cas los xij, thaum kho qhov ceev ntawm pwm qhib thiab xauv rau pwm nrog cov kab ntawm kab, qhov ceev thiab ceev ntawm pwm qhib thiab xauv yuav tsum tau txiav txim siab raws li qhov siab thiab cov qauv ntawm cov kab. Cov qauv pwm tshwj xeeb thiab cov tub ntxhais rub cov pwm tau piav qhia hauv cov tshooj hauv qab no vim lawv cov txheej txheem nyuaj.
4. Kev tswj ntawm thimble ceev;
Nws tsuas yog nyob ntawm qhov demoulding mob ntawm cov khoom. Nyob rau hauv txoj cai, nws yuav tsum ceev li sai tau nyob rau hauv lub hauv paus ntawm kom ntseeg tau tias cov khoom tsis tshwm dawb, siab, los yog deformed. Txwv tsis pub, cov kev txwv yuav tsum tau kho kom haum raws li qhov xwm txheej tiag tiag. Tau kawg; Raws li ib txwm muaj, thawj zaug los kho cov demoulding Qhov tseeb ceev yuav tsum yog nruab nrab mus rau qis ceev (15%-35%), uas tuaj yeem ua tau zoo rau kev pab cuam lub neej ntawm ejector tus pin thiab ejector lub tog raj kheej.
3. Qhov chaw
Hloov cov ntsiab lus ntawm qhov ceev thiab qeeb qeeb, siab thiab qis ntawm txhua qhov kev ua
1. Tswj txoj haujlwm txhaj tshuaj;
Thaum lub sij hawm txhaj tshuaj molding parameter debugging, txoj hauj lwm txhaj tshuaj yuav tsum tau kho raws li qhov hnyav thiab cov qauv ntawm cov khoom. Thaum kho txoj haujlwm los ntawm kev xav txog qhov hnyav ntawm cov khoom, nws feem ntau hais tias cov kua nplaum yuav tsum muaj rau cov khoom,
Piv txwv li: ib yam khoom muaj ib qhov hnyav li ntawm 50G thiab yog tsim los ntawm 90T txhaj molding tshuab. Lub theoretical txhaj ntim ntawm cov qauv no yog 120G thiab lub melting stroke yog 130MM. Qhov kwv yees yaj qhov hnyav ib MM yog qhov kev txhaj tshuaj theoretical ntawm 120G ÷ cov hlab ntsha tawg ntawm 130MM. =0.92G, uas yog, qhov kev txhaj tshuaj deb ntawm cov khoom yog 50 × 0.92=46MM txoj haujlwm. Yog hais tias lub yaj kawg txoj hauj lwm yog teem rau ntawm 60MM, ces cov khoom zoo yog yeej OK thaum txhaj mus txog 14MM.
(Tau kawg, cov saum toj no yog raws li kev paub dhau los, thiab muaj qee qhov sib txawv, vim hais tias cov ntsia hlau compression piv piv cov qauv hauv phau ntawv tsis ua raws. Nws nyuaj heev, thiab kuv ntseeg tias feem ntau cov npoj yaig tsis tuaj yeem suav nws.) siv txoj hauj lwm txhaj tshuaj los tswj ntau yam moldings Defects hauv cov khoom.
2. Kev tswj ntawm qhov chaw yaj;
Feem ntau hais lus, nws tau nkag siab tias qhov sib nrug deb yog teem rau hauv cov lus teb rau qhov yuav tsum tau txhaj tshuaj ntawm cov khoom molded. Cov npoj yaig feem ntau tsis quav ntsej txog peb-theem hloov txoj haujlwm ntawm cov yaj thiab tsuas yog tsom mus rau qhov kawg ntawm txoj haujlwm yaj. Tau kawg; rau molded cov khoom ntawm qhov yooj yim nyuaj, lub yaj txoj hauj lwm yuav tsum tau kho Nws tsis yog yuav tsum tau hloov ntawm ceev thiab qeeb ceev los yog siab thiab qis rov qab siab, thiab yuav tsum tau cov khoom zoo tseem yuav ua tau tiav. Txawm li cas los xij, thaum tsim cov xim masterbatch thiab cov khoom siv hluav taws xob kub-rhiab heev, nws yog qhov zoo dua los hloov qhov nrawm nrawm thiab rov qab siab hloov txoj haujlwm. tswj cov khoom zoo.
3. Txoj hauj lwm tswj pwm qhib thiab kaw;
Qhov kev hloov pauv feem ntau yog teeb tsa raws li qhov xav tau ntawm pwm qhib thiab xauv nrawm.
3.1 Raws li ib txwm muaj, qhov hloov pauv ntawm pwm qhib ceev yog qeeb qeeb ua ntej cov khoom pwm tawm hauv pwm kab noj hniav (txog 5-15MM), tom qab ntawd ceev ceev, uas tuaj yeem txo lub sij hawm xav tau rau pwm qhib, thiab thaum kawg qeeb qeeb (piv txwv li pwm qhib tsis pub). Txoj hauj lwm, feem ntau yog 20-40MM deb ntawm qhov yuav tsum tau qhov kawg ntawm txoj hauj lwm ntawm pwm qhib, nws yog qhov zoo dua los pib hloov (qhov kawg txoj hauj lwm nyob ntawm cov khoom tsim thiab seb tus neeg hlau puas siv), uas tuaj yeem ua tau zoo rau kev pab cuam lub neej. lub tshuab txhaj tshuaj molding thiab kev ruaj ntseg ntawm pwm qhib qhov kev txiav txim).
Cov txheej txheem ntawm qee cov pwm tshwj xeeb, xws li cov pwm peb-phaj lossis cov tub ntxhais-rub pwm, cov pwm qhib ceev yuav tsum tau txiav txim siab raws li qhov xwm txheej tiag tiag. Piv txwv li, peb-phaj pwm muaj cov khoom kab noj hniav nyob rau hauv nruab nrab phaj. Thaum qhib pwm, thawj qhov kev txiav txim yog nyob rau ntawm lub nozzle phaj, thiab lub nozzle yuav tsum tau tom qab tus khiav yog sib cais los ntawm cov khoom, cov txiv neej thiab poj niam pwm yog sib cais dua, yog li 1-2 hloov cov ntsiab lus yuav tsum tau ntxiv. ntawm lub pwm qhib txoj hauj lwm, uas yog nruab nrab-ceev-ceev-siab ceev-slow ceev. Cov cav tov nrog cov tonnage loj tuaj yeem hloov kho raws li xav tau. Ntxiv ob peb ntxiv cov ntsiab lus hloov, hauv luv luv, qhov zoo ntawm cov khoom molded yuav tsis cuam tshuam thaum lub sij hawm qhib pwm thiab cov txheej txheem txav yuav du.
3.2 Kev teeb tsa ntawm txoj haujlwm clamping feem ntau yog nyob ntawm tus qauv ntawm cov pwm. Piv txwv li: cov qauv pwm tiaj tus (uas yog, qhov chaw seem ntawm lub hauv ntej thiab nram qab pwm yog ob qho tib si tiaj tus, tsis muaj slider / tub ntxhais rub, tsis muaj cov qauv ntxig) hloov ntawm qhov nrawm nrawm. Koj tuaj yeem siv ncaj qha rau 4- txoj haujlwm txoj haujlwm los ua "ceev-nruab nrab-ceev-siab-siab-siab". Lub hauv paus ntsiab lus hloov ntawm txoj hauj lwm yog: qhov ceev pwm clamping stroke zoo dua li ntawm 70% ntawm pwm qhib stroke. (Qhov kawg txoj hauj lwm ceev ntawm peb-phaj pwm nyob ntawm Nyob ntawm seb qhov loj ntawm cov pwm), nws lub luag haujlwm tseem ceeb yog kom luv lub pwm clamping voj voog. Tom qab lub nruab nrab ceev, nws ua raws li ib tug deceleration tsis rau high-ceev pwm locking (vim nws yuav hloov mus rau lub low-voltage tiv thaiv muaj nuj nqi tom qab nruab nrab ceev)
Qhov kawg txoj hauj lwm ntawm pwm clamping nruab nrab ceev yog ib qho tseem ceeb heev, raws li nws txiav txim siab pib txoj hauj lwm ntawm cov pwm clamping tsawg voltage tiv thaiv. Qee cov neeg ua haujlwm paub txog tsis meej pem txog cov pwm clamping tsis tshua muaj hluav taws xob thiab xav tias cov pwm tuaj yeem raug kaw los ntawm txhua qhov chaw. Qhov tseeb, qhov no tsis yog qhov xwm txheej. Yog tias cov pwm clamping qis qis tau teeb tsa tsis raug, nws txoj haujlwm tiv thaiv yuav ploj tag nrho, uas ua rau tuag taus rau tag nrho cov pwm tuaj pwm.
4. Kev tswj ntawm ejector tus pin txoj hauj lwm;
Raws li txoj cai, qhov ntev ntawm qhov ejector tus pin yog ob zaug qhov siab ntawm pwm kab noj hniav (piv txwv li, pwm core) tom qab pwm. Txawm li cas los xij, hauv kev ua haujlwm tiag tiag, nws tsis tas yuav teeb tsa txoj haujlwm raws nraim raws li txoj kev no. Tshwj xeeb, nws yog tsuas yog los pab txhawb kev tshem tawm ntawm cov khoom. Txawm li cas los xij, thaum kho tus ejector tus pin txoj hauj lwm thawj zaug, nws yuav tsum maj mam lengthen nws. Ua ntej, 50% ntawm cov pwm ejector tus pin stroke yuav tsum raug tshem tawm, thiab tom qab ntawd nws nyob ntawm qhov kev tshem tawm ntawm cov khoom thaum lub sijhawm tsim khoom.
4. Kub
Cov xwm txheej tsim nyog yuav tsum tau ua rau cov yas yaj thiab pwm cua sov
1. Tswj cov khoom siv raj kub;
Feem ntau hais lus, cov yas uas muaj cov khoom sib txawv muaj cov qauv molding kub, xws li: ABS=(qhov txawv ntawm 230-260 rau cov ntaub ntawv muaj kev cuam tshuam loj thiab 190-230 rau cov ntaub ntawv tsis tshua muaj kev cuam tshuam), SAN{ {5}}, HIPS=180- 220, POM=170-200, PC=240-300, ABS/PC=230-260, PMMA=200-230, PVC= (qhov txawv high density 160-200, low density 140-180), PP=180-230 , PE= (qhov txawv ntawm qhov siab ceev 240-300 thiab tsawg ntom 180-230);
TPE= (txhais tau qhov ceev ceev 170-200, qhov ceev tsawg 140-180), TPR= (qhov txawv qhov siab ceev 170-200, qhov ntom ntom 140-180), TPU= (txhais tau qhov ceev ceev 160-200, tsawg ntom 120-160) PA=230-270, PA+fiber=250-300, PBT=200-240, PBT+fiber =240-280. Tsis tas li ntawd, molding kub ntawm kev ntxiv nplaim retardants (piv txwv li cov ntaub ntawv hluav taws kub retardant) yuav tsum yog 20-30 degrees qis dua cov ntaub ntawv zoo tib yam. Qhov tshwj xeeb siv kub yog nyob ntawm qhov xwm txheej ntau lawm, vim tias qhov kub ntawm molding ncaj qha cuam tshuam rau lub fluidity, viscosity, pwm kub, xim, shrinkage tus nqi, khoom deformation, thiab lwm yam.
2. Tswj pwm kub;
Cov pwm kub feem ntau nyob ntawm qhov fluidity ntawm cov yas sib txawv. Ib qho yooj yim to taub yog tias nws yog tus txheej txheem tseem ceeb kom kov yeej cov dej tsis zoo. Piv txwv li, cov ntaub ntawv PC thiab PA + cov ntaub ntawv fiber ntau muaj cov dej tsis zoo, thiab lawv cov dej tsis kam thaum lub sij hawm txhaws yog loj, yog li lawv yuav tsum tau ceev dua. Cov kua nplaum txhaj tshuaj nrawm yog siv rau kev txhaws.
Tsis tas li ntawd, thaum tsim PC pob tshab yas qhov chaw, yuav tsum muaj pwm kub ntau dua los txhim kho cov huab cua saum npoo, cov cim zaj sawv, cov npuas sab hauv thiab lwm yam teeb meem tsis zoo. Thaum tsim cov khoom siv fiber ntau, yog tias pwm kub qis, cov nyiaj streaks yuav tshwm rau saum npoo (loj fibers).
Raws li ib txwm muaj, koj tuaj yeem xa mus rau cov ntaub ntawv hauv qab no los kho cov pwm kub:
ABS=30-50 (Cov khoom lag luam nrog cov kev xav tau zoo saum npoo av lossis kev tswj deformation tuaj yeem raug tsa mus rau 60-110 degrees) PC=50-80 (Cov khoom lag luam nrog cov khoom zoo siab lossis cov khoom nyias nyias tuaj yeem tsa tau rau { {4}} degrees) HIPS= 30-50 (pob tshab PS thiab cov khoom uas muaj qhov xav tau zoo saum npoo tuaj yeem nce mus rau 60-80 degrees)
PMMA=60-80 (cov khoom siv phab ntsa nyias nyias thiab cov khoom lag luam uas muaj qhov zoo ntawm qhov yuav tsum tau nce mus rau 80-120 degrees) PP=10-50, PE=10-50 (high-density los yog nyias-walled Cov khoom tuaj yeem ua rau pwm kub kom tsim nyog) Roj Hmab (TPE, TPR, TPU)=10-50,
PA, PBT=30-60 (cov ntaub ntawv uas yuav tsum tau ua kom zoo thiab cov iav fiber ntau ntxiv tuaj yeem nce mus rau 70-100)
5. Sijhawm
Lub sijhawm txhua qhov kev ua yuav siv los ua
1. Kev tswj lub sijhawm ua tiav;
Xws li lub sijhawm txhaj tshuaj thiab lub sijhawm tuav
1.1. Lub sijhawm txhaj tshuaj:
Feem ntau hais lus, yog tias qhov zoo ntawm cov khoom tsim nyog, qhov luv dua qhov zoo dua. Vim tias lub sij hawm txhaj tshuaj ncaj qha cuam tshuam rau kev ntxhov siab sab hauv thiab lub voj voog ntawm cov khoom, nyob rau hauv txoj cai, lub thinner lub kua nplaum txoj hauj lwm ntawm cov khoom, lub sij hawm txhaj tshuaj luv dua. Ntawm qhov tsis sib xws, rau cov khoom tuab-walled, lub sij hawm tswj yog Qhov teeb meem shrinkage yuav tsum tau ncua sij hawm txhaj tshuaj raws li qhov tsim nyog.
Tsis tas li ntawd, cov khoom siv uas siv ntau theem thiab muaj ntau yam kev hloov pauv sai thiab qeeb yuav tsum tau txhaj tshuaj ntev dua. Kev teeb tsa lub sijhawm txhaj tshuaj kuj yuav tsum tau teem caij raws li qhov ntim ntawm cov khoom (qhov loj ntawm cov khoom, lub sijhawm txhaj tshuaj ntev dua). Kev tsim khoom kuj yuav tsum tau xav txog ntawm no. Siv cov khoom siv yas, xws li: cov yas yas ABS, thaum cov khoom phab ntsa tuab yog 2.0MM, qhov kev txhaj tshuaj nrawm yog nruab nrab, thiab cov khoom siv raj kub yog nruab nrab, qhov ntev ntawm qhov ntws yog li 65 hli / thib ob (tus nqi ntws sib txawv rau cov qauv pwm sib txawv lossis cov txheej txheem).
1.2. Lub sijhawm tuav lub zog:
Nyob rau hauv txoj cai, lub sij hawm tuav tsuas yog tswj lub nto shrinkage ntawm cov khoom thiab cov qauv loj ntawm cov khoom. Txawm li cas los xij, tom qab ua tiav txoj kev tswj hwm ntawm lub sijhawm tuav, lub zog tuav kuj tuaj yeem siv los kho qhov deformation ntawm cov khoom (yog li ntawd, cov txheej txheem hloov kho yog cov txheej txheem hloov kho precision, uas yuav tau tham tom qab. txoj kev).
Ntawm no kuv yuav piav qhia luv luv yuav ua li cas siv tuav lub siab los tswj cov khoom shrinkage. Feem ntau, kev xaiv ntawm kev siv tuav lub siab los tswj cov khoom shrinkage nyob ntawm qhov shrinkage txoj hauj lwm ntawm cov khoom. Tsis yog tag nrho cov shrinkage tuaj yeem daws tau los ntawm kev tuav lub siab, xws li: shrinkage Txoj hauj lwm yog qhov kawg ntawm melt filling. Kev siv lub zog tuav kom tswj tau qhov shrinkage yuav ua rau muaj kev ntxhov siab ntau nyob ze ntawm lub nozzle, ua rau sab saum toj whitening, pwm sticking, los yog khoom warping thiab deformation.
2.Thimble extension
Lub sij hawm; feem ntau tswj lub sijhawm nyob ntawm tus ejector tus pin thaum nws raug tshem tawm, thiaj li ua kom yooj yim rau cov neeg hlau tuaj tos cov khoom.
3. Core rub lub sij hawm;
Tswj lub sijhawm ua haujlwm ntawm cov tub ntxhais-rub cov cuab yeej ntawm lub tshuab txhaj tshuaj molding (tsuas yog siv los tswj kev ua haujlwm stroke los ntawm lub sijhawm). Yog tias cov tub ntxhais-rub ntawm cov tub ntxhais-rub cov hlab ntsha yog tswj los ntawm kev hloov pauv induction, lub sijhawm rub lub hauv paus tsis tas yuav tsum tau teeb tsa.
