Cov txheej txheem ntawm tshuab moulding yog complex, thiab muaj ntau yam cuam tshuam rau qhov zoo ntawm cov khoom, uas feem ntau muaj xws li cov duab ntawm cov khoom, kev ua tau zoo ntawm raw cov ntaub ntawv thiab cov txheej txheem tsis ua hauj lwm molding.Txawm hais tias muaj ntau yam cuam tshuam rau kev ua tau zoo ntawm cov khoom, thaum cov khoom xav tau thiab cov txheej txheem raug txiav txim siab, qhov zoo ntawm cov khoom tuaj yeem ua kom zoo dua los ntawm kev hloov cov kev cuam tshuam, uas tuaj yeem ua tiav lub hom phiaj ntawm kev txo cov khoom siv raw, txo cov khoom. sijhawm thiab optimizing cov khoom ua haujlwm.
1 、 Hom khoom
Cov khoom sib txawv thiab hom resin raw cov ntaub ntawv yuav ua rau kev ua thiab molding tshuab thiab khoom siv hloov.Lub melting Performance index, molecular hnyav thiab rheological zog ntawm resin raw cov ntaub ntawv yuav cuam tshuam cov shaping ntawm cov khoom, tshwj xeeb tshaj yog nyob rau hauv lub extrusion theem ntawm lub billet, lub melting fluidity ntawm raw cov ntaub ntawv yuav ua rau lub billet yooj yim los tsim sag phenomenon, yuav ua rau cov phab ntsa. thickness ntawm cov khoom thinner thiab uneven tis.
2 、 Cov khoom zoo
Raws li cov tsos ntawm tshuab molding khoom yog ntau thiab ntau complex, uas ua rau lub tshuab molding khoom ntawm txhua txoj hauj lwm ntawm lub tshuab expansion piv yog txawv.Lub convex ntug, kov, ces kaum thiab lwm txoj hauj lwm ntawm cov khoom vim qhov sib txawv ntawm cov khoom yog qhov loj, cov phab ntsa thickness ntawm cov khoom yuav tsum nyias, yog li nyob rau hauv cov txheej txheem ntawm tshuab moulding yuav ua rau kom qhov no ib feem ntawm lub billet phab ntsa thickness.Cov tsos ntawm cov khoom lag luam yog qhov nyuaj, nrog ntau lub ces kaum thiab convex npoo.Lub tshuab sib piv ntawm cov khoom no loj dua li ntawm lwm qhov chaw tiaj tus, thiab cov phab ntsa tuab yog nyias nyias, yog li cov thickness faib ntawm hollow tshuab molded cov khoom tsis sib xws.
3 、 Pwm expansion thiab ntsug txuas ntxiv ntawm parison
Ib qho ntawm cov kev sib txuas tseem ceeb hauv txoj kev hollow tshuab moulding yog extrusion txoj kev ntawm qhov khoob.Qhov loj thiab tuab ntawm qhov khoob hauv paus txiav txim siab qhov loj thiab phab ntsa thickness ntawm cov khoom.Qhov tshwm sim ntawm yaj ntsug txuas ntxiv thiab pwm nthuav dav yuav raug tsim nyob rau hauv txoj kev tsim ntawm billet.Qhov ntsug txuas ntxiv ntawm lub billet yog qhov cuam tshuam ntawm nws tus kheej lub ntiajteb txawj nqus, uas ua rau qhov ntev ntawm lub billet nce thiab thickness thiab txoj kab uas hla.Thaum cov khoom siv raw yog rhuab thiab melted los ntawm extruder, lub nonlinear viscoelastic deformation tshwm sim thaum cov khoom yog extruded los ntawm lub taub hau, uas ua rau qhov ntev ntawm lub billet shorten thiab lub thickness thiab txoj kab uas hla.Nyob rau hauv cov txheej txheem ntawm extrusion thiab tshuab moulding, ob qhov tshwm sim ntawm ntsug txuas ntxiv thiab pwm nthuav dav cuam tshuam tib lub sijhawm, ua rau qhov nyuaj ntawm tshuab moulding, tab sis kuj ua rau cov khoom thickness faib tsis sib xws.
4 、 Kub ntawm kev ua haujlwm
HDPE ua haujlwm kub feem ntau yog 160 ~ 210 ℃.Kev ua haujlwm kub siab dhau lawm, yuav ua rau hom billet sag phenomenon yog pom tseeb, phab ntsa thickness faib tsis zoo li qub, tab sis qhov saum npoo ntawm cov khoom yuav du;Qhov kub ntawm lub taub hau tuag yuav tsum yog ze li sai tau rau qhov kub ntawm qhov cua sov.Qhov kub ntawm lub qhov ncauj ntawm lub khob yuav tsum tau qis dua li ntawm lub taub hau tuag, uas tuaj yeem txo qhov cuam tshuam ntawm pwm expansion ntawm parison.
5 、 Tus nqi ntawm extrusion
Nrog rau qhov nce ntawm extrusion ceev, qhov loj ntawm pwm expansion ntawm lub billet, lub thickness ntawm lub billet yuav nce.Yog hais tias lub extrusion ceev qeeb dhau, qhov ntev ntawm lub billet yog cuam tshuam los ntawm nws tus kheej qhov hnyav, qhov loj dua qhov tshwm sim ntawm cov billet yog.Extrusion ceev ceev heev, yuav ua rau hom billet shark ntawm daim tawv nqaij tshwm sim, loj yuav ua rau hom billet rupture.Lub extrusion ceev yuav raug cuam tshuam los ntawm lub sij hawm tshuab, ceev ceev heev yuav txo lub sij hawm tshuab, tej zaum yuav ua rau cov khoom tsis tuaj yeem tsim.Lub extrusion ceev yuav cuam tshuam rau saum npoo thiab phab ntsa thickness ntawm cov khoom, yog li cov extrusion ceev ntau yuav tsum tau kho tas li.
6 、 Qhov sib piv ntawm lub tshuab kom nthuav dav
Cov yaj ntawm lub puab thiab sab nrauv ntawm qhov khoob yuav raug tshuab thiab txuas ntxiv sai sai hauv cov pwm thiab ze rau saum npoo ntawm pwm kom txog thaum nws txias thiab tsim.Qhov khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoobCov pa tawm tau yooj yim tshwm sim thaum lub tshuab tshuab thiab o ntawm lub raj mis loj dua, uas ua rau lub tshuab tsis ua haujlwm thiab tsim.Cov tsos ntawm cov khoom zoo heev cuam tshuam rau qhov sib piv ntawm lub tshuab thaum tshuab molding.Thaum tshuab cov khoom uas tsis sib xws, qhov sib piv ntawm lub tshuab yuav tsum tsis txhob loj dhau, txwv tsis pub nws yooj yim ua rau yaj rupture.
7 、 Tshuab siab thiab lub sijhawm
Nyob rau hauv cov txheej txheem ntawm tshuab moulding, cov roj compressed tuaj yeem ua rau lub tshuab ziab khaub ncaws thiab daim ntawv thiab cling rau hauv pwm.Txoj kev sib sau ceev ntawm lub billet yog txiav txim siab los ntawm cov roj siab.Thaum cov roj siab loj dhau lawm, qhov deformation ceev ntawm qhov khoob yog ceev, uas yuav ua rau lub dav hlau ib feem ntawm qhov khoob sai sai ze rau sab hauv pwm, kom qhov kub ntawm qhov khoob yog txo nyob rau hauv lub zog ntawm pwm. , thiab qhov khoob yog maj mam tsim, uas tsis tuaj yeem txuas ntxiv mus deform.Nyob rau lub sijhawm no, vim tias qhov loj ntawm cov duab sib txawv, lub kaum sab xis ntawm lub billet tsis tau txuas nrog cov pwm, thiab qhov deformation txuas ntxiv, ua rau tsis sib npaug ntawm phab ntsa thickness ntawm cov khoom.Thaum cov roj siab me me dhau lawm, kev molding ntawm cov khoom yog qhov nyuaj, thiab vim tias lub siab tuav lub siab me me dhau, lub billet yuav ntsws thiab tsis tuaj yeem tau txais cov khoom zoo dua, yog li nws yog qhov tsim nyog los tswj cov roj siab kom tsim nyog thaum tshuab.Lub tshuab siab ntawm cov khoom hollow feem ntau tswj hauv 0.2 ~ 1 MPa.Tshuab lub sij hawm yog txiav txim siab los ntawm lub tshuab molding lub sij hawm, siab tuav lub sij hawm thiab txias lub sij hawm ntawm cov khoom.Yog hais tias lub sij hawm tshuab yog luv luv, yuav ua rau cov khoom tshuab moulding lub sij hawm luv luv, tsis muaj txaus siab tuav thiab txias lub sij hawm, lub billet yuav pom tseeb shrink nyob rau hauv, lub nto yuav ntxhib, cuam tshuam rau cov tsos ntawm cov khoom, txawm tsis muaj peev xwm. raug tsim;Yog tias lub sijhawm tshuab tshuab ntev dhau lawm, cov khoom tuaj yeem muaj qhov zoo nkauj, tab sis nws yuav ua rau lub sijhawm ntau lawm.
8 、 Pwm kub thiab txias lub sijhawm
Qhov kev txiav ntawm qhov tuag feem ntau yog ua los ntawm cov khoom siv hlau nrog ntau dua toughness, yog li nws yuav tsum muaj cov cua txias zoo heev.Cov pwm kub qis dhau yuav ua rau cov pwm txiav txias sai dua, tsis muaj ductility;Qhov kub thiab txias yuav ua rau lub billet txias tsis txaus, cov pwm txiav yuav nyias nyias, cov khoom shrinkage tshwm sim yog pom tseeb thaum txias, ua rau cov khoom loj deformation.Lub sijhawm txias yog ntev dua, qhov cuam tshuam ntawm pwm kub ntawm cov khoom yog me me, lub shrinkage tsis pom tseeb;Lub sij hawm txias yog luv luv, lub billet yuav pom tseeb shrinkage phenomenon, cov khoom nto yuav ntxhib, yog li nws yog tsim nyog los tswj lub pwm kub thiab txias lub sij hawm.
9. Ceev ntawm cov ntsia hlau
Qhov ceev ntawm cov ntsia hlau yuav cuam tshuam qhov zoo ntawm cov billet thiab kev ua haujlwm ntawm extruder.Qhov loj ntawm cov ntsia hlau ceev yog txwv los ntawm cov khoom siv raw, cov duab ntawm cov khoom, qhov loj thiab cov duab ntawm cov ntsia hlau.Thaum lub rotating ceev yog tsawg heev, kev ua hauj lwm efficiency ntawm lub extruder yog obviously txo, thiab ntsug stretch lub sij hawm ntawm lub billet yog ntev, uas ua rau lub uneven faib ntawm phab ntsa thickness ntawm cov khoom.Kev ua kom nrawm nrawm yuav txo tau lub sijhawm ua haujlwm thiab ua kom lub zog noj.Nyob rau tib lub sijhawm, qhov nce ntawm cov ntsia hlau nrawm tuaj yeem txhim kho tus nqi ntawm cov ntsia hlau rau cov khoom siv raw thiab ua kom zoo dua qhov zoo ntawm cov khoom.Tab sis cov ntsia hlau ceev yuav tsum tsis txhob siab dhau, vim hais tias qhov ceev yog siab dhau yuav ua rau cov khoom siv raw hauv lub taub hau thiab lub qhov ncauj ntawm lub khob nyob rau hauv luv luv, qhov kub thiab txias tsis sib xws, cov phab ntsa thickness ntawm lub billet cuam tshuam, thiab tom qab ntawd cuam tshuam cov tsos ntawm cov khoom.Kev sib hloov ceev dhau kuj tseem yuav ua rau muaj kev sib txhuam quab yuam, tsim kom muaj cua sov ntau yuav ua rau cov khoom siv raw khoom degradation, kuj tuaj yeem tshwm sim yaj rupture tshwm sim.
Lub sij hawm xa tuaj: Nov-19-2022