Cov yam xws li shrinkage, fluidity, crystallinity, tshav kub rhiab plastics thiab yooj yim hydrolyzed yas, kev nyuaj siab tawg thiab yaj tawg, thermal kev ua tau zoo, txias npaum li cas, noo noo nqus thiab thiaj li nyob rau yuav tsum tau txiav txim siab nyob rau hauv qhov chaw ntawm txhaj tshuaj molding txheej txheem.

SainuoEBS ciab

1. Shrinkage
Daim ntawv thiab suav cov thermoplastic molding shrinkage tau piav qhia saum toj no. Cov yam ntxwv cuam tshuam rau thermoplastic molding shrinkage yog raws li nram no:
1.1 ntau yam yas
Thaum lub sij hawm molding txheej txheem ntawm thermoplastic, vim lub ntim hloov los ntawm crystallization, muaj zog nyob rau hauv kev ntxhov siab, loj residual kev nyuaj siab khov nyob rau hauv cov yas, muaj zog molecular orientation thiab lwm yam, piv txwv li. nrog thermosetting plastics, tus nqi shrinkage yog loj, lub shrinkage ntau yog dav thiab cov directionality yog pom tseeb. Tsis tas li ntawd, lub shrinkage Lub shrinkage tom qab annealing los yog humidity tswj kev kho mob feem ntau loj dua li ntawm cov thermosetting yas.
1.2 yas seem yam ntxwv
Thaum lub sij hawm molding, cov khoom molten hu rau cov kab noj hniav, thiab txheej txheej tam sim ntawd txias kom tsim ib lub plhaub uas tsis muaj zog. Vim cov neeg pluag thermal conductivity ntawm yas, lub puab txheej ntawm yas qhov chaw cools maj mam tsim tau ib cov high-density khoom txheej nrog loj shrinkage. Yog li ntawd, phab ntsa thickness, qeeb txias thiab high-density txheej thickness shrink heev. Tsis tas li ntawd, lub xub ntiag los yog tsis muaj inserts, layout thiab kom muaj nuj nqis ntawm inserts ncaj qha cuam tshuam rau cov khoom ntws kev taw qhia, ceev tis thiab shrinkage kuj, yog li cov yam ntxwv ntawm yas qhov chaw muaj kev cuam tshuam zoo rau lub shrinkage loj thiab kev taw qhia.
1.3 pub inlet daim ntawv, qhov loj me thiab kev faib tawm
Cov yam ntxwv no cuam tshuam ncaj qha rau cov khoom ntws ntws, kev faib tawm ceev, kev tswj xyuas siab thiab pub mis thiab lub sijhawm ua haujlwm. Yog tias seem ntawm qhov chaw nres nkoj pub ncaj qha thiab qhov chaw nres nkoj pub yog loj (tshwj xeeb tshaj yog tias seem yog tuab), lub shrinkage yog me me tab sis lub directionality yog loj, thiab yog hais tias qhov dav thiab ntev ntawm lub feed chaw nres nkoj yog luv, lub directionality yog me me. . Yog tias nws nyob ze rau qhov chaw nres nkoj pub los yog sib npaug rau cov khoom ntws, qhov shrinkage loj.
1.4 txheej txheej
pwm kub kub, txias qeeb ntawm cov khoom molten, siab ceev thiab loj shrinkage, tshwj xeeb tshaj yog rau cov khoom siv crystalline, vim crystallinity siab thiab loj ntim hloov, lub shrinkage yog ntau dua. Cov pwm kub faib kuj tseem cuam tshuam rau sab hauv thiab sab nraud txias ntawm cov khoom yas thiab qhov sib xws ntawm qhov ntom ntom, uas cuam tshuam ncaj qha rau qhov loj thiab kev taw qhia ntawm shrinkage ntawm txhua qhov chaw. Tsis tas li ntawd, tuav lub siab thiab lub sij hawm kuj muaj kev cuam tshuam zoo rau kev cog lus. Cov neeg uas muaj kev kub siab thiab lub sij hawm ntev muaj kev sib cog lus me me tab sis loj directionality.
Kev txhaj tshuaj siab yog siab, qhov sib txawv ntawm qhov sib txawv ntawm cov khoom molten yog me me, lub interlayer shear stress yog me me, thiab elastic rebound tom qab demoulding loj, yog li lub shrinkage kuj yuav raug txo kom tsim nyog. Cov khoom kub yog siab, lub shrinkage yog loj, tab sis lub directionality yog me me. Yog li ntawd, qhov shrinkage ntawm cov khoom yas kuj tuaj yeem hloov tau los ntawm kev kho pwm kub, siab, txhaj tshuaj ceev thiab lub sijhawm txias.

Npog nrog pe ciab flake

Thaum lub sij hawm tsim pwm, tus nqi shrinkage ntawm txhua feem ntawm cov yas yuav tsum tau txiav txim raws li kev paub raws li qhov shrinkage ntau yam ntawm cov yas, phab ntsa thickness thiab cov duab ntawm cov yas, daim ntawv, qhov loj me thiab kev faib tawm ntawm cov khoom noj, thiab tom qab ntawd cov kab noj hniav. qhov loj me yuav tsum xam. Rau cov khoom yas siab thiab thaum nws nyuaj rau tus tswv lub shrinkage, cov txheej txheem hauv qab no yuav tsum tau siv los tsim cov pwm:
① Rau sab nraud ntawm cov yas, qhov me me shrinkage npaum li cas, thiab qhov loj shrinkage tus nqi yog. coj mus rau sab hauv txoj kab uas hla, thiaj li tawm hauv chav rau kev kho tom qab pwm kuaj.
② Daim ntawv, qhov loj me thiab kev tsim cov txheej txheem ntawm lub rooj vag yog txiav txim los ntawm kev kuaj pwm.
③ Kev hloov pauv loj ntawm cov khoom yas yuav tsum tau kho tom qab kev kho mob tom qab (kev ntsuas yuav tsum yog 24 teev tom qab demoulding).
④ Kho qhov tuag raws li qhov tseeb shrinkage.
⑤ Sim cov pwm dua, thiab hloov cov txheej txheem kom tsim nyog, thiab hloov kho me ntsis tus nqi shrinkage kom tau raws li qhov yuav tsum tau ntawm cov khoom yas.
2. Mobility
Lub fluidity ntawm thermoplastics feem ntau yuav soj ntsuam los ntawm ib tug series ntawm indexes xws li molecular hnyav, yaj index, Archimedean kauv ntws ntev, pom meej viscosity thiab txaus ratio (txheej txheem ntev / yas ib feem phab ntsa thickness).
Yog tias qhov hnyav molecular me me, qhov hnyav molecular faib yog qhov dav, cov qauv molecular tsis tu ncua yog qhov tsis zoo, qhov ntsuas yaj yog siab, cov ntsia hlau ntws ntev ntev, qhov pom tseeb viscosity me me, thiab qhov sib piv yog qhov loj, fluidity yog. zoo. Rau cov yas nrog tib lub npe khoom, cov lus qhia yuav tsum tau kuaj xyuas seb lawv cov fluidity puas haum rau kev txhaj tshuaj molding. Raws li cov qauv tsim pwm, qhov fluidity ntawm cov yas sib xyaw tuaj yeem faib ua peb pawg:
① zoo fluidity: PA, PE, PS, PP, CA, poly (4) methylene;
② Polystyrene series resins nrog nruab nrab fluidity (xws li ABS, xws li), PMMA, POM thiab polyphenylene ether;
③ Tsis zoo fluidity PC, tawv PVC, polyphenylene ether, polysulfone, polysulfone, fluoroplastics.
Lub fluidity ntawm ntau yam yas kuj hloov vim muaj ntau yam molding yam. Lub ntsiab cuam tshuam muaj xws li hauv qab no:
① Thaum qhov kub thiab txias, qhov fluidity nce, tab sis cov yas sib txawv kuj muaj qhov sib txawv. Lub fluidity ntawm PS (tshwj xeeb tshaj yog cov uas muaj kev cuam tshuam siab thiab MFR tus nqi), PP, PA, PMMA, hloov polystyrene (xws li ABS, xws li), PC, Ca thiab lwm yam plastics hloov nrog kub. Rau PE, POM thiab, qhov nce lossis txo qis ntawm qhov kub thiab txias tsis cuam tshuam rau lawv cov dej ntws. Yog li ntawd, tus qub yuav tsum tau kho qhov kub thiab txias los tswj lub fluidity.
② Nrog rau qhov nce ntawm kev txhaj tshuaj siab, cov khoom molten yuav zoo heev sheared thiab fluidity kuj yuav nce, tshwj xeeb tshaj yog PE thiab POM rhiab heev, yog li lub txhaj tshuaj yuav tsum tau kho kom tswj lub fluidity thaum molding.
③ Pwm qauv, rooj vag system daim ntawv, qhov loj, layout, txias system tsim, molten cov ntaub ntawv txaus tsis kam (xws li nto tiav, cov khoom channel seem thickness, kab noj hniav zoo, tso system) thiab lwm yam tseem ceeb cuam tshuam qhov tseeb fluidity ntawm molten khoom nyob rau hauv lub kab noj hniav. Yog hais tias cov khoom molten raug ceeb toom kom txo qhov kub thiab ua kom lub fluidity tsis kam, fluidity yuav raug txo.
Cov qauv tsim nyog yuav tsum raug xaiv raws li qhov fluidity ntawm cov yas siv hauv pwm tsim. Thaum lub sij hawm molding, cov khoom kub, pwm kub, kev txhaj tshuaj siab, txhaj tshuaj ceev thiab lwm yam tseem tuaj yeem tswj tau los kho qhov ntim qhov xwm txheej kom tau raws li cov kev xav tau molding.
3. Crystallinity
Thermoplastics tuaj yeem muab faib ua crystalline plastics thiab amorphous (tseem hu ua amorphous) plastics raws li lawv tsis muaj crystallization thaum lub sij hawm condensation.
Qhov tshwm sim hu ua crystallization yog ib qho tshwm sim uas cov molecules txav ntawm nws tus kheej thiab tag nrho nyob rau hauv ib qho kev tsis sib haum xeeb los ntawm lub xeev melting mus rau lub condensation xeev ntawm plastics, thiab dhau los ua ib tug tshwm sim uas cov molecules tsis tsiv mus nyob dawb, nias ib tug me ntsis taag txoj hauj lwm, thiab muaj. ib qho kev nyiam ua kom cov txheej txheem molecular ua ib qho qauv.
Raws li tus qauv pom zoo rau kev txiav txim siab ntawm ob hom yas, nws tuaj yeem txiav txim siab los ntawm cov pob tshab ntawm cov phab ntsa tuab ntawm cov yas. Feem ntau, cov ntaub ntawv crystalline yog opaque lossis translucent (xws li POM), thiab cov khoom siv amorphous yog pob tshab (xws li PMMA). Txawm li cas los xij, muaj kev zam. Piv txwv li, poly (4) methylene yog cov yas crystalline nrog cov pob tshab siab, thiab ABS yog cov khoom siv amorphous tab sis tsis pob tshab.

Sainuoope waxhmoov dawb

Cov kev cai hauv qab no thiab kev ceev faj rau cov khoom siv crystalline yuav tsum raug sau tseg thaum lub sij hawm tsim pwm thiab xaiv lub tshuab txhaj tshuaj molding:
① Cov khoom siv kub yuav tsum tau nce mus rau qhov kub, yog li cov khoom siv nrog cov yas yas loj yuav tsum tau siv.
② Lub tshav kub tso tawm thaum lub caij txias thiab rov ua dua tshiab yog qhov loj, yog li nws yuav tsum tau txias tag nrho.
③ Qhov sib txawv ntawm qhov sib txawv ntawm lub xeev molten thiab lub xeev cov khoom yog loj, lub molding shrinkage yog loj, thiab shrinkage thiab porosity yog ib qho yooj yim tshwm sim.
④ ceev txias, tsis tshua muaj crystallinity, me me shrinkage thiab siab transparency. Lub crystallinity muaj feem xyuam rau cov phab ntsa thickness ntawm cov yas. Phab ntsa thickness muaj qhov zoo ntawm qhov txias txias, siab crystallinity, loj shrinkage thiab zoo lub cev. Yog li ntawd, cov pwm kub ntawm cov khoom siv crystalline yuav tsum tau tswj raws li qhov xav tau.
⑤ Qhov tseem ceeb anisotropy thiab kev ntxhov siab loj. Tom qab demoulding, cov tsis crystallized molecules zoo li mus txuas ntxiv mus crystallize, nyob rau hauv lub zog tsis txaus lub xeev, thiab yog nquag deformation thiab warpage.
⑥ Lub crystallization kub ntau yog nqaim, thiab nws yog ib qho yooj yim rau txhaj tshuaj unmelted rau hauv tuag los yog thaiv cov khoom noj.
Qingdao Sainuo Tshuaj Co., Ltd. Peb yog cov chaw tsim khoom rau PE ciab, PP ciab, OPE ciab, EVA ciab, PEMA, EBS, Zinc / Calcium Stearate .... Peb cov khoom tau dhau los ntawm REACH, ROHS, PAHS, FDA kuaj. Sainuo so assured ciab, txais tos koj nug! Lub Vev Xaib: https://www.sanowax.com
E-mail ： sales@qdsainuo.com
               kev muag khoom1@qdsainuo.com
Adress ： Chav 2702, Thaiv B, Lub Tsev Suning, Jingkou Road, Licang District, Qingdao, Suav