Txawm hais tias cov qauv ntawm cov pwm tuaj yeem sib txawv vim muaj ntau hom thiab cov khoom ntawm cov yas, cov duab thiab cov qauv ntawm cov khoom yas, thiab hom kev txhaj tshuaj tshuab, cov qauv hauv paus yog tib yam. Cov pwm yog tsim los ntawm cov txheej txheem pouring, tswj qhov kub thiab txias, molded qhov chaw thiab cov khoom siv. Ntawm lawv, cov txheej txheem pouring thiab molded qhov chaw yog cov khoom uas muaj kev sib cuag ncaj qha nrog cov yas thiab hloov nrog cov yas thiab cov khoom. Lawv yog cov feem ntau complex thiab hloov qhov chaw ntawm pwm thiab yuav tsum tau lub siab tshaj plaws ua smoothness thiab precision.
Cov pwm txhaj tshuaj muaj ob ntu: pwm txav tau thiab pwm ruaj khov. Cov pwm txav tau raug ntsia rau ntawm cov qauv txav ntawm lub tshuab txhaj tshuaj molding, thiab cov pwm ruaj khov yog ntsia rau ntawm cov qauv ruaj khov ntawm lub tshuab txhaj tshuaj molding. Thaum lub sij hawm txhaj tshuaj molding, cov pwm txav tau thiab cov pwm ruaj khov raug kaw los tsim cov txheej txheem pouring thiab kab noj hniav. Thaum cov pwm qhib, cov pwm txav tau thiab cov pwm ruaj khov raug sib cais kom yooj yim tshem tawm cov khoom yas. Txhawm rau txo qis kev ua haujlwm hnyav ntawm pwm tsim thiab tsim, feem ntau cov pwm txhaj tshuaj siv cov qauv pwm.
Gating system
Lub rooj vag kaw lus hais txog cov neeg khiav dej num ua ntej cov yas nkag mus rau hauv kab noj hniav ntawm lub nozzle, nrog rau cov channel tseem ceeb, cov khoom txias kab noj hniav, khiav thiab rooj vag, thiab lwm yam.
Lub rooj vag kaw kuj tseem hu ua qhov kev khiav haujlwm. Nws yog ib txheej ntawm cov khoom noj uas coj cov yas yaj los ntawm lub tshuab txhaj tshuaj nozzle mus rau pwm kab noj hniav. Nws feem ntau muaj lub ntsiab channel, tus khiav, lub rooj vag thiab cov khoom siv txias txias. Nws yog ncaj qha ntsig txog molding zoo thiab ntau lawm efficiency ntawm cov khoom yas.
lub ntsiab channel
Nws yog ib qho kev nkag mus rau hauv cov pwm uas txuas lub nozzle ntawm lub tshuab txhaj tshuaj molding mus rau qhov khiav los yog kab noj hniav. Sab saum toj ntawm lub ntsiab ntws channel yog concave mus txuas nrog lub nozzle. Txoj kab uas hla ntawm lub ntsiab channel inlet yuav tsum yog me ntsis loj dua li txoj kab uas hla ntawm lub nozzle (0.8mm) kom tsis txhob dhau thiab tiv thaiv ob qho tib si los ntawm kev thaiv vim qhov kev sib txuas tsis raug. Txoj kab uas hla inlet nyob ntawm qhov loj ntawm cov khoom, feem ntau 4-8mm. Lub ntsiab channel txoj kab uas hla yuav tsum tau nthuav mus rau sab hauv ntawm lub kaum sab xis ntawm 3 degree mus rau 5 degree los pab txhawb lub demoulding ntawm tus khiav dhau.
txias khoom qhov
Nws yog cov kab noj hniav nyob rau hauv qhov kawg ntawm lub ntsiab channel kom ntes cov khoom txias uas tsim los ntawm ob qho kev txhaj tshuaj ntawm qhov kawg ntawm lub nozzle, yog li tiv thaiv tus khiav los yog lub rooj vag los ntawm kev thaiv. Yog tias cov khoom txias sib xyaw rau hauv pwm kab noj hniav, kev ntxhov siab sab hauv yuav yooj yim tshwm sim hauv cov khoom tsim. Txoj kab uas hla ntawm cov khoom txias yog li ntawm 8-10mm thiab qhov tob yog 6mm. Txhawm rau kom yooj yim demoulding, hauv qab feem ntau yog los ntawm tus pas nrig demoulding. Sab saum toj ntawm lub demoulding pas nrig yuav tsum tau tsim nyob rau hauv ib tug zigzag nuv zoo los yog muaj ib tug sunken zawj kom lub ntsiab channel khib nyiab yuav rub tawm smoothly thaum lub sij hawm demoulding.
shunt
Nws yog cov channel txuas rau lub ntsiab channel thiab txhua qhov kab noj hniav nyob rau hauv ntau qhov pwm. Txhawm rau kom cov khoom molten sau rau txhua qhov kab noj hniav ntawm qhov nrawm tas li, qhov kev sib tw khiav ntawm cov pwm yuav tsum sib npaug thiab sib faib sib npaug. Cov duab thiab qhov loj ntawm tus khiav hla ntu muaj kev cuam tshuam rau kev ntws ntawm cov yas yaj, cov khoom demoulding thiab qhov yooj yim ntawm kev tsim pwm.
Yog tias peb xav txog qhov ntws ntawm cov khoom sib npaug ntawm cov khoom siv, qhov ntws channel nrog ncig hla ntu muaj qhov tsawg tshaj plaws tsis kam. Txawm li cas los xij, vim hais tias qhov tshwj xeeb ntawm tus cylindrical khiav yog me me, nws tsis zoo rau qhov txias ntawm qhov kev sib tw khiav, thiab tus khiav yuav tsum tau qhib rau ntawm ob sab ntawm cov pwm, uas yog kev siv zog ntau thiab nyuaj rau kev sib dhos.
Yog li ntawd, ib tug trapezoidal los yog semicircular cross-section khiav yog feem ntau siv, thiab yog qhib rau ib nrab ntawm cov pwm nrog ib tug demoulding pas nrig. Cov neeg khiav dej num yuav tsum tau polished kom tsis txhob ntws tawm thiab muab pwm ua kom nrawm dua. Qhov loj ntawm tus khiav yog nyob ntawm hom yas, qhov loj thiab tuab ntawm cov khoom. Rau feem ntau cov thermoplastics, qhov dav ntawm qhov hla ntawm shunt tsis ntau tshaj 8m, qhov loj ntxiv tuaj yeem ncav cuag 10-12m, thiab qhov me me tuaj yeem yog 2-3m. Nyob rau ntawm qhov chaw ua tau raws li qhov xav tau, qhov chaw hla ntu yuav tsum raug txo kom ntau li ntau tau los ua kom qhov rov ua dua ntawm shunt thiab ncua lub sijhawm txias.
Rooj vag
Nws yog cov channel uas txuas lub ntsiab channel (los yog khiav) thiab kab noj hniav. Qhov chaw hla ntu ntawm cov channel tuaj yeem sib npaug rau lub ntsiab channel (los yog ceg channel), tab sis feem ntau nws raug txo. Yog li ntawd nws yog ib feem nrog qhov tsawg tshaj plaws cross-sectional cheeb tsam nyob rau hauv tag nrho cov ntws channel system. Cov duab thiab qhov loj ntawm lub rooj vag muaj kev cuam tshuam zoo rau qhov zoo ntawm cov khoom.
Lub luag haujlwm ntawm lub rooj vag yog:
A. Tswj cov khoom ntws ceev:
B. Thaum lub sij hawm txhaj tshuaj, cov yaj uas khaws cia rau hauv qhov no tuaj yeem tiv thaiv kom tsis txhob ntws rov qab vim muaj kev ruaj khov thaum ntxov:
C. Kawm txog qhov dhau los ua kom muaj zog shear kom qhov kub thiab txias, yog li txo qhov pom tseeb viscosity los txhim kho fluidity:
D. Ua kom yooj yim rau kev sib cais ntawm cov khoom thiab ntws channel system. Kev tsim ntawm lub rooj vag zoo, qhov loj thiab qhov chaw nyob ntawm qhov xwm txheej ntawm cov yas, qhov loj thiab cov qauv ntawm cov khoom. Feem ntau, cov duab ntoo ntawm lub rooj vag yog cov duab plaub lossis lub voj voog, thiab qhov chaw hla ntu yuav tsum me me thiab qhov ntev yuav tsum luv. Qhov no tsis yog tsuas yog raws li cov teebmeem saum toj no, tab sis kuj vim tias nws yooj yim dua rau lub rooj vag me me kom loj dua, tab sis nws nyuaj rau txo lub rooj vag loj. Lub rooj vag txoj hauj lwm feem ntau yuav tsum tau xaiv qhov twg cov khoom yog thickest yam tsis muaj kev cuam tshuam cov tsos.
Qhov loj ntawm lub rooj vag yuav tsum tau tsim los rau hauv tus account lub zog ntawm cov yas yaj. Cov kab noj hniav yog qhov chaw nyob hauv cov pwm uas cov khoom yas tsim. Cov khoom siv los tsim cov kab noj hniav yog sib sau ua ke hu ua molded qhov chaw.
Cov molded tus kheej feem ntau muaj cov npe tshwj xeeb. Cov molded qhov chaw uas tsim cov duab ntawm cov khoom yog hu ua concave pwm (tseem hu ua poj niam pwm), thiab cov khoom uas ua rau cov duab puab ntawm cov khoom (xws li qhov, grooves, thiab lwm yam) yog hu ua cores los yog punches ( kuj hu ua txiv neej pwm). Thaum tsim molded qhov chaw, tag nrho cov qauv ntawm cov kab noj hniav yuav tsum xub txiav txim siab raws li cov khoom ntawm cov yas, cov geometry ntawm cov khoom, qhov ntev kam rau ua thiab yuav tsum tau siv.
Qhov thib ob kauj ruam yog xaiv qhov chaw ntawm parting nto, rooj vag thiab vents raws li zoo raws li demoulding txoj kev raws li tus qauv txiav txim.
Thaum kawg, cov khoom yog tsim raws li qhov loj ntawm cov khoom tswj thiab kev sib xyaw ntawm cov khoom txiav txim siab. Cov yas yaj muaj qhov siab siab thaum nkag mus rau hauv pwm kab noj hniav, yog li cov pwm pwm yuav tsum raug xaiv kom tsim nyog thiab xyuas lawv lub zog thiab nruj.
In order to ensure that the surface of plastic products is smooth, beautiful and easy to demould, all surfaces in contact with plastics must have a roughness Ra>0.32um thiab yuav tsum yog corrosion-resistant. Cov khoom tsim feem ntau yog kho cua sov kom muaj zog thiab ua los ntawm corrosion-resistant steel.
Kub tswj qhov system
Txhawm rau ua kom tau raws li qhov xav tau ntawm pwm kub ntawm cov txheej txheem txhaj tshuaj, qhov kev hloov kho qhov kub thiab txias yuav tsum tau kho qhov kub ntawm pwm. Rau kev txhaj tshuaj pwm siv rau cov yas thermoplastic, lub tshuab cua txias yog tsim los kom txias pwm. Txoj hauv kev ua kom txias pwm yog qhib lub qhov dej txias hauv pwm thiab siv cov dej txias txias kom tshem tawm cov cua sov ntawm pwm. Ntxiv nrog rau kev siv dej kub lossis chav dej hauv cov dej txias, cov cua kub ntawm cov pwm tuaj yeem ua tau los ntawm kev txhim kho hluav taws xob sab hauv thiab ib puag ncig pwm. Cua sov ntsiab.
Moulded qhov chaw
Nws yog hais txog ntau qhov chaw uas tsim cov duab ntawm cov khoom, nrog rau cov pwm txav tau, cov pwm ruaj khov thiab cov kab noj hniav, cov tub ntxhais, cov pas nrig sib dhos thiab qhov chaw nres nkoj. Lub molded ib feem muaj ib tug core thiab ib tug tuag. Cov tub ntxhais tsim cov txheej txheem sab hauv ntawm cov khoom, thiab cov tuag ua rau sab nrauv ntawm cov khoom. Tom qab cov pwm raug kaw, cov tub ntxhais thiab cov kab noj hniav tsim cov kab noj hniav ntawm cov pwm. Raws li cov txheej txheem thiab kev tsim khoom, qee zaum cov tub ntxhais thiab tuag tau ua ke los ntawm ob peb daim, qee zaum lawv tau ua tag nrho, thiab cov khoom siv tsuas yog siv rau hauv qhov chaw uas yooj yim puas thiab nyuaj rau txheej txheem.
tso pa tawm
Nws yog lub qhov hluav taws xob zoo li lub qhov hluav taws xob qhib rau hauv pwm kom tso tawm cov roj qub thiab cov roj uas coj los ntawm cov yaj. Thaum cov khoom molten raug txhaj rau hauv pwm kab noj hniav, cov huab cua qub uas twb muaj lawm hauv pwm kab noj hniav thiab cov roj uas tau los ntawm cov yaj yuav tsum tau tawm ntawm cov pwm los ntawm qhov chaw nres nkoj ntawm qhov kawg ntawm cov khoom ntws. Txwv tsis pub, cov khoom yuav muaj qhov pores, kev sib txuas tsis zoo, thiab cov pwm filling tsis txaus siab, thiab cov huab cua sib xyaw kuj tseem tuaj yeem hlawv cov khoom vim qhov kub siab los ntawm compression.
Nyob rau hauv ib txwm muaj xwm txheej, lub qhov tso pa tawm tuaj yeem nyob ntawm qhov kawg ntawm cov yaj ntws hauv cov kab noj hniav lossis ntawm qhov seem ntawm cov pwm. Lub tom kawg yog qhib ib qhov ntiav ntiav nrog qhov tob ntawm 0.03-0.2mm thiab dav ntawm 1.5-6mm ntawm ib sab ntawm qhov tuag. Thaum lub sij hawm txhaj tshuaj, ntau cov khoom molten yuav tsis nkag mus rau hauv lub qhov cua, vim hais tias cov khoom molten yuav txias thiab solidify muaj thiab thaiv cov channel. Qhov chaw nres nkoj yuav tsum tsis txhob qhib rau ntawm tus neeg teb xov tooj kom tiv thaiv cov khoom molten los ntawm kev txau thiab ua rau tib neeg raug mob. Tsis tas li ntawd, qhov sib txawv ntawm lub ejector pas nrig thiab lub qhov ejector, qhov sib txawv ntawm lub ejector thaiv thiab lub stripping phaj thiab cov tub ntxhais tseem tuaj yeem siv los ua pa tawm.
cov khoom siv
Nws hais txog ntau qhov chaw uas tsim cov qauv pwm, suav nrog: phau ntawv qhia, demoulding, core rub thiab parting qhov chaw. Xws li pem hauv ntej thiab nram qab plywood, pem hauv ntej thiab nram qab buckle templates, siab-bearing daim hlau, siab-bearing txhua, qhia kab, stripping daim hlau, stripping rods thiab rov qab rods, thiab lwm yam.
1. Qhia qhov chaw
Txhawm rau kom ntseeg tau tias cov pwm tuaj yeem txav tau thiab cov pwm ruaj khov tuaj yeem ua raws li qhov tseeb thaum kaw cov pwm, cov lus qhia cov khoom yuav tsum tau muab tso rau hauv pwm. Hauv kev txhaj tshuaj pwm, plaub pawg ntawm phau ntawv qhia thiab lub tes tsho qhia feem ntau yog siv los ua cov khoom qhia. Qee lub sij hawm nws yog ib qho tsim nyog los teeb tsa kev sib koom ua ke ntawm sab hauv thiab sab nrauv ntawm cov pwm txav tau thiab cov pwm ruaj khov los pab qhov chaw.
2. Qhib lub koom haum
Thaum lub sijhawm qhib pwm, lub tshuab thawb tawm yuav tsum thawb lossis rub tawm cov khoom yas thiab lawv cov condensate hauv cov dej ntws. Tshem tawm lub phaj ruaj khov thiab thawb phaj los tuav lub laub pas nrig. Feem ntau muaj ib tug reset pas nrig tsau nyob rau hauv lub laub pas nrig, uas rov pib dua lub laub phaj thaum tsiv thiab tsau pwm raug kaw.
3. Sab core rub mechanism
Qee cov khoom yas nrog sab concavities los yog sab qhov yuav tsum tau sab-parted ua ntej yuav raug thawb tawm. Tom qab rub tawm cov tub ntxhais sab nraud, lawv tuaj yeem ua tau zoo demoulded. Lub sijhawm no, ib sab core-rub mechanism yuav tsum tau muab tso rau hauv pwm.
