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Nylon muaj kev ua tau zoo tshwj xeeb, yog li nws siv dav hauv tsheb, khoom siv hluav taws xob thiab hluav taws xob, cov qauv kho tshuab, cov khoom siv kis las, textiles, thiab lwm yam. Txawm li cas los xij, kev ua kom me me ntawm lub tsheb, kev ua haujlwm siab ntawm cov khoom siv hluav taws xob thiab hluav taws xob, thiab lub teeb ntawm cov khoom siv kho tshuab ua kom nrawm dua, qhov kev thov thiab kev ua tau zoo rau nylon maj mam nce ntxiv. Yog li kev hloov kho ntawm nylon zoo li tseem ceeb heev.
Cov kev ceev faj rau kev hloov kho nylon
1. Kev teeb tsa kub ntawm lub thoob
(1) Vim tias nylon yog cov polymer crystalline, nws muaj qhov chaw yaj pom tseeb. Qhov kub ntawm nylon hauv lub thoob thaum txhaj tshuaj nyob ntawm qhov ua tau zoo ntawm cov resin, tshuab thiab cov duab ntawm cov khoom.
(2) Yog tias qhov kub ntawm cov khoom siv siab dhau, nws tuaj yeem ua rau muaj kev hloov pauv, brittleness thiab cov xov nyiaj hauv yas qhov chaw, thiab yog tias qhov kub ntawm cov khoom siv qis dhau, nws tuaj yeem ua rau cov khoom siv tawv heev thiab tuaj yeem ua rau pwm thiab ntsia hlau puas tsuaj.
(3) Feem ntau, qhov kub tsawg kawg nkaus ntawm PA6 yog 220 ℃, thiab PA66 yog 250 ℃. Vim tias nylon tsis ruaj khov, nws tsis haum rau nyob hauv lub thoob ntawm qhov kub siab ntev ntev kom tsis txhob muaj xim thiab daj ntawm cov khoom. Tib lub sijhawm, vim nylon muaj cov kua dej zoo, nws ntws sai tom qab qhov kub tshaj nws qhov melting point.
2. Qhov kub ntawm pwm
(1) Qhov kub ntawm pwm muaj qee yam cuam tshuam rau qhov crystallinity thiab molding shrinkage. Qhov kub ntawm pwm yog li ntawm 80 txog 120 ° C.
Xaiv qhov kub pwm siab, crystallinity siab, ua rau hnav tsis kam ntau dua, tawv, elastic modulus, nqus dej tsawg dua, ua rau molding shrinkage ntawm cov khoom ntau dua, tsim rau cov khoom tuab; xaiv qhov kub pwm qis, crystallinity qis, toughness zoo, elongation Siab dua, shrinkage txo qis, tsim rau cov khoom nyias nrog pob tshab zoo.
(2) Yog tias phab ntsa tuab dua 3 hli, nws raug pom zoo kom siv cov pwm kub qis ntawm 20 ~ 40 ℃. Rau cov ntaub ntawv iav txhawb nqa, qhov kub ntawm cov pwm yuav tsum siab dua 80 ° C.
(3) Kev tswj qhov kub ntawm cov pwm qhov twg phab ntsa ntawm cov khoom yog nyias thiab nyuaj rau tsim lossis xav tau crystallinity siab. Yog tias cov khoom xav tau qee qib ntawm kev ywj pheej, kev tswj qhov kub ntawm dej txias feem ntau yog siv.
3. Khoom phab ntsa tuab
Qhov sib piv ntawm cov dej ntws ntawm nylon yog 150 txog 200, thiab phab ntsa tuab ntawm cov khoom tsis tsawg dua 0.8 hli, feem ntau yog 1 txog 3.2 hli. Ntxiv mus, qhov ntsws ntawm cov khoom muaj feem cuam tshuam nrog phab ntsa tuab ntawm cov khoom. Qhov tuab ntawm phab ntsa tuab, qhov ntsws ntau dua.
4. Tso pa tawm
Tus nqi ntws ntawm nylon resin yog li 0.03 hli, yog li qhov qhib qhov yuav tsum tau tswj hwm qis dua 0.025.
5. Cov neeg khiav thiab cov rooj vag
Lub qhov rooj vag txoj kab uas hla yuav tsum tsis pub tsawg dua 0.5t (t yog qhov tuab ntawm qhov yas). Nrog cov rooj vag submersible, qhov tsawg kawg nkaus txoj kab uas hla lub rooj vag yuav tsum yog 0.75mm.
6. Cov iav fiber ntau yam
Thaum lub sijhawm ua cov nylon molding, qhov kub ntawm cov pwm yuav txo qis, ua rau lub siab txhaj tshuaj nce ntxiv, thiab qhov kub ntawm cov khoom yuav txo qhov ceev ntawm nylon mus rau qee qhov, ua rau cov khoom yooj yim deformation vim muaj kev ntxhov siab sab hauv. Piv txwv li, qhov ceev ntawm PA66 yog 1.5% txog 2%, thiab qhov ceev ntawm PA6 yog 1% txog 1.5%. Tom qab ntxiv cov khoom siv fiber iav, qhov ceev ntawm cov nylon tuaj yeem txo qis mus txog 0.3%.
Kev paub dhau los qhia rau peb tias qhov ntxiv ntau cov iav fiber, qhov molding shrinkage ntawm nylon resin me dua. Txawm li cas los xij, ntxiv ntau dhau iav fiber yuav ua rau cov fibers ntab rau ntawm qhov chaw thiab tsis sib xws. Feem ntau, ntxiv 30% muaj cov txiaj ntsig zoo.
7. Kev siv cov khoom siv rov ua dua tshiab
Zoo tshaj plaws tsis txhob siv ntau tshaj peb zaug kom tsis txhob muaj xim ploj ntawm cov khoom lossis ua rau cov khoom siv lub cev thiab lub cev poob qis. Kev siv ntau npaum li cas yuav tsum tswj kom tsis txhob ntau tshaj 25%. Kev siv ntau dhau yuav ua rau muaj kev hloov pauv ntawm cov txheej txheem. Cov khoom siv rov ua dua tshiab thiab cov khoom siv tshiab yuav tsum tau ziab kom qhuav.
8. Cov lus qhia txog kev nyab xeeb
Thaum pib siv cov nylon resin, koj yuav tsum xub qhib qhov kub ntawm lub nozzle, thiab tom qab ntawd ua kom lub thoob sov. Thaum lub nozzle raug thaiv, tsis txhob tig lub qhov nozzle kom tiv thaiv cov yaj hauv lub thoob kom tsis txhob raug tso tawm tam sim ntawd vim muaj kev sib sau ua ke ntawm lub siab thiab ua rau muaj kev phom sij.
9. Siv tus neeg tso tawm
Siv me ntsis cov tshuaj tso tawm qee zaum yuav txhim kho thiab tshem tawm cov qhov tsis zoo xws li cov npuas. Cov tshuaj tso tawm rau cov khoom nylon tuaj yeem yog zinc stearate, roj dawb, thiab lwm yam, lossis nws tuaj yeem sib xyaw ua ib qho nplaum thiab siv. Cov ntau yuav tsum me me thiab txawm tias thaum siv los tiv thaiv cov qhov tsis zoo ntawm cov khoom. Lub hau ntswj yuav tsum tau muab tso rau hauv qhov chaw thaum lub tshuab kaw kom tiv thaiv lub hau ntswj kom tsis txhob tawg thaum lub sijhawm tsim khoom tom ntej.
10. Tom qab ua tiav
(1) Kev kho cua sov yog qhov yuav tsum tau ua tom qab cov khoom tsim.
Cov txheej txheem siv ntau: Hauv cov kua dej kub xws li roj av, glycerin, thiab kua paraffin, qhov kub kho cua sov yuav tsum siab dua 10 txog 20 ° C dua li qhov kub siv. Lub sijhawm kho sib txawv nyob ntawm phab ntsa tuab ntawm cov khoom. Qhov tuab yog 10 txog 15 feeb yog tias qhov tuab tsawg dua 3 hli, thiab qhov tuab yog 3 txog 20 feeb. Lub sijhawm 6 hli yog 15 txog 30 feeb. Cov khoom kho cua sov yuav tsum maj mam txias rau qhov kub hauv chav kom tiv thaiv kev rov ua dua ntawm kev ntxhov siab hauv cov khoom uas tshwm sim los ntawm kev txias tam sim ntawd. (2) Kev tswj hwm av noo yuav tsum tau ua tom qab cov khoom tsim.
Kev kho kom cov av noo feem ntau yog ua rau cov khoom uas muaj cov av noo ib puag ncig siab. Muaj ob txoj kev: ib qho yog txoj kev kho kom cov av noo hauv dej npau; qhov thib ob yog txoj kev kho kom cov av noo hauv cov kua dej potassium acetate (qhov piv ntawm potassium acetate rau dej yog 1.25: 1, Boiling point 121 ° C).
Txoj kev tswj cov av noo hauv dej npau yog yooj yim, tsuav yog cov khoom muab tso rau hauv ib puag ncig nrog cov av noo ntawm 65% kom ua tiav qhov sib npaug ntawm cov av noo nqus, tab sis nws siv sijhawm ntev, thaum cov tshuaj potassium acetate aqueous solution av noo tswj txoj kev xav tau acetic acid ntawm qhov kub ua tiav ntawm 80 txog 100 ° C Potassium aqueous solution av noo tswj txoj kev, lub sijhawm ua tiav feem ntau nyob ntawm phab ntsa tuab ntawm cov khoom, kwv yees li 2 teev thaum phab ntsa tuab yog 1.5 hli, kwv yees li 8 teev thaum phab ntsa tuab yog 3 hli, thiab 16 txog 18 teev thaum phab ntsa tuab yog 6 hli.
Table of Contents
Nrog yuav luag 20 xyoo hauv kev lag luam khoom siv extrusion ntse, nws tau tuav lub luag haujlwm tseem ceeb ntawm Jwell Machinery, suav nrog Tus Thawj Coj General thiab Tus Thawj Coj Hloov Chaw. Txij li xyoo 2024, nws tau tswj hwm ntau lub tuam txhab me, tsav kev nthuav dav lag luam thiab kev txhim kho kev lag luam, thaum ua tus thawj coj hauv kev tsim khoom ntse thiab kev loj hlob thoob ntiaj teb.
