Qhov kub ntawm cov yas txhaj tshuaj pwm yuav tsum yog dab tsi?

Qhov tseem ceeb ntawm pwm kub
Pwm kub yog qhov hloov pauv tseem ceeb hauv cov txheej txheem txhaj tshuaj molding, uas txiav txim siab qhov txias txias, crystallinity, thiab lub cev lub cev ntawm cov yas yaj hauv pwm. Ntau dhau los yog tsis txaus pwm kub tuaj yeem ua rau muaj kev phom sij rau cov khoom. Piv txwv li, yog tias pwm kub qis dhau lawm, nws tuaj yeem ua rau cov yas yaj kom txias sai heev, ua rau muaj kev ntxhov siab tseem ceeb hauv lub cev thiab txo qhov kev ruaj ntseg ntawm cov khoom thiab qhov cuam tshuam lub zog; Yog tias pwm kub siab dhau lawm, nws yuav ua rau cov yas overheat thiab decompose, ua rau muaj qhov tsis xws luag xws li npuas thiab tawg. Nyob rau tib lub sijhawm, nws tseem tuaj yeem ua kom lub sijhawm txias thiab txo cov khoom tsim tawm.
Qhov tshwj xeeb ntawm pwm kub
Qhov ntsuas kub tsim nyog rau kev txhaj tshuaj pwm txawv nyob ntawm ntau yam xws li hom yas, cov qauv khoom, thiab pwm tsim. Cov hauv qab no yog qee qhov pwm kub kub ntau rau cov yas:
PP (polypropylene): Cov pwm kub feem ntau yog teem rau ntawm 40-80 degree . Lub melting kub ntawm cov ntaub ntawv polypropylene kuj tsis tshua muaj, thiab qhov yuav tsum tau rau pwm kub yog kuj tsawg. Txawm li cas los xij, qhov tsim nyog pwm kub tuaj yeem pab txhim kho lub ntsej muag glossiness thiab qhov ruaj khov ntawm cov khoom.
PPS (polyphenylene sulfide): Cov pwm kub yog nyob nruab nrab ntawm 120 thiab 180 degree. PPS yog cov thermoplastic uas muaj kev ua haujlwm siab nrog kev ua haujlwm siab kub thiab tshuaj tiv thaiv corrosion, yog li xav tau pwm siab dua kom paub meej txaus txaus thiab crystallization ntawm cov yas yaj.
POM (Polyoxymethylene): Cov pwm kub feem ntau yog 80-105 degree . Rau cov khoom lag luam nrog thaj chaw loj dua, yuav tsum muaj pwm ntau dua kom ntseeg tau tias cov yas yaj zoo ib yam.
PE-HD (high-density polyethylene): Cov pwm kub feem ntau yog nruab nrab ntawm 50-95 degree . Lub melting kub ntawm high-density polyethylene yog kuj tsis tshua muaj, tab sis ib tug tsim nyog pwm kub yuav pab tau txo tus nqi ntawm shrinkage thiab kev ntxhov siab nyob rau hauv cov khoom.
PC (polycarbonate): Nws raug pom zoo kom teem pwm kub ntawm 70-120 degree . Polycarbonate muaj qhov kub hloov pauv iav thiab cov khoom siv zoo, tab sis cov pwm kub ntau dhau tuaj yeem ua rau cov khoom deformation lossis kev ntxhov siab tawg.
PBT (polybutylene terephthalate): Cov pwm kub rau cov ntaub ntawv tsis muaj zog yog feem ntau ntawm 40-60 degree . Rau cov khoom siv ntxiv, cov pwm kub yuav tsum tau nce kom tsim nyog kom txaus txaus thiab crystallization ntawm cov yas yaj.
PA6 (polyamide 6 los yog nylon 6): Rau nyias-walled thiab ntev txheej txheem yas, qhov pom zoo pwm kub yog 80-90 degree ; Thaum cov phab ntsa tuab ntau dua 3 hli, nws raug nquahu kom siv cov pwm kub qis ntawm 20-40 degree kom txo tau cov kev ntxhov siab sab hauv thiab warping deformation. Rau cov khoom siv iav, cov pwm kub yuav tsum siab tshaj 80 degree.
ABS (acrylonitrile butadiene styrene copolymer): Cov pwm kub ntau yog dav, feem ntau ntawm 25-70 degree . Qhov kub ntawm cov pwm yuav cuam tshuam ncaj qha rau qhov smoothness thiab seem stability ntawm cov khoom.
PA12 (polyamide lossis nylon 12): Cov pwm kub rau cov ntaub ntawv tsis muaj zog yog 30-40 degree ; Rau nyias-walled los yog cheeb tsam loj, pwm kub tuaj yeem nce mus rau 80-90 degree ; Rau cov khoom siv ntxiv, cov pwm kub yuav tsum ncav cuag 90-100 degree . Ua kom cov pwm kub yuav ua rau kom cov crystallinity ntawm cov khoom, yog li txhim kho lub cev ntawm cov khoom.
PA66 (Nylon 66): Cov pwm kub rau cov ntaub ntawv tsis muaj zog yog 60-90 degree ; Qhov pom zoo pwm kub rau cov khoom siv ntxiv (nrog fiber ntau ntxiv ntawm 30%) yog 80-120 degree .
Muaj feem cuam tshuam thiab tswj txoj hauv kev
Qhov kub ntawm cov pwm yog cuam tshuam los ntawm ntau yam, nrog rau lub nozzle thiab chim kub ntawm kev txhaj tshuaj molding tshuab, hom thiab zoo ntawm cov ntaub ntawv yas, cov khoom thiab cov qauv ntawm cov pwm, lub siab thiab ntws tus nqi ntawm lub txhaj tshuaj molding tshuab, ib puag ncig kub thiab av noo, thiab lwm yam. Yuav kom tswj tau qhov ruaj khov ntawm pwm kub, txhaj tshuaj molding tshuab feem ntau yog nruab nrog pwm kub tswj cov cuab yeej. Lub tshuab pwm kub tuaj yeem tswj tau qhov kub ntawm pwm, ua kom sov rau qhov ua haujlwm kub thiab tswj nws qhov tsis tu ncua, yog li txhim kho qhov zoo thiab kev ua haujlwm ntawm kev txhaj tshuaj molded qhov chaw.
Hauv kev tsim khoom tiag tiag, xaiv qhov tsim nyog pwm kub thiab tswj kev ruaj ntseg yog tus yuam sij kom ntseeg tau cov khoom zoo. Tsis tas li ntawd, nws yog ib qho tsim nyog los kho cov txheej txheem txhaj tshuaj molding tsis raws li cov qauv khoom thiab cov yam ntxwv ntawm cov khoom, xws li kev txhaj tshuaj ceev, txhaj tshuaj siab, tuav lub sijhawm, thiab lwm yam, kom ua tiav cov nyhuv molding zoo tshaj plaws.