1.Yas refining
Lub ntsiab lus ntawm plasticization: Qhov tshwm sim uas cov roj hmab hloov los ntawm cov khoom siv elastic mus rau cov khoom yas nyob rau hauv kev cuam tshuam ntawm lwm yam yog hu ua plasticization.
(1)Lub hom phiaj ntawm Refining
a.Pab kom cov roj hmab nyoos kom ua tiav ib qib ntawm plasticity, haum rau tom qab theem ntawm kev sib xyaw thiab lwm yam txheej txheem
b.Kev sib koom ua ke ntawm plasticity ntawm cov roj hmab nyoos thiab xyuas kom meej txawm tias cov khoom siv roj hmab zoo
(2)Kev txiav txim siab ntawm cov khoom siv yas uas yuav tsum tau muaj: Mooney saum 60 (theoretical) Mooney saum 90 (qhov tseeb)
(3)Plastic refining tshuab:
a. Qhib zeb
Nta: Kev siv zog ua haujlwm siab, kev ua haujlwm qis qis, kev ua haujlwm tsis zoo, tab sis nws yog qhov hloov tau yooj yim, nrog kev nqis peev tsawg, thiab tsim nyog rau cov xwm txheej uas muaj ntau qhov kev hloov pauv Qhov ceev piv ntawm ob lub nruas ntawm qhov qhib zeb: pem hauv ntej mus rau sab nraub qaum (1: 1.15). -1.27)
Txoj kev khiav hauj lwm: Nyias hla yas refining txoj kev, yob wrapping yas refining txoj kev, nce thav duab txoj kev, tshuaj plasticizer txoj kev
Lub sijhawm ua haujlwm: Lub sijhawm molding yuav tsum tsis pub tshaj 20 feeb, thiab lub sijhawm nres tsheb yuav tsum yog 4-8 teev
b.Internal tov khoom
Nta: Kev ua haujlwm siab ntau lawm, kev ua haujlwm yooj yim, kev siv zog tsawg, thiab cov yas zoo ib yam. Txawm li cas los xij, qhov kub thiab txias tuaj yeem ua rau txo qis hauv lub cev thiab lub zog ntawm cov khoom siv roj hmab
Txoj kev ua haujlwm: Nyhav → Pub → Plasticizing → Tshem tawm → Rov qab → Nias → Txias thiab tshem tawm → Cia
Lub sijhawm ua haujlwm: 10-15 feeb Chaw nres tsheb: 4-6 teev
(4)Tsis tu ncua plasticized roj hmab
Cov khoom siv roj hmab uas feem ntau yuav tsum tau molded muaj xws li NR, nyuaj NBR, tawv roj hmab, thiab cov uas muaj Mooney ntsuam xyuas ntawm 90 lossis siab dua.
2.Sib tov
Lub ntsiab lus ntawm kev sib tov yog ntxiv ntau yam additives rau roj hmab los ua cov roj hmab sib xyaw
(1)Qhib lub tov khoom kom sib tov
a.Wrapping roller: qhwv cov roj hmab nyoos rau ntawm cov menyuam hauv ntej thiab muaj cov txheej txheem preheating luv luv ntawm 3-5 feeb
b.Noj cov txheej txheem: Ntxiv cov additives uas yuav tsum tau ntxiv rau hauv ib qho kev txiav txim. Thaum ntxiv, them sai sai rau qhov ntim ntawm cov kua nplaum nplaum. Tsawg dua yog qhov nyuaj rau kev sib tov, thaum ntau dua yuav yob thiab tsis yooj yim rau kev sib tov
Kev pub noj ib ntus: roj hmab nyoos → tus neeg sawv cev ua haujlwm, kev pab cuam → sulfur → filling, softening agent, dispersant → processing aid → accelerator
c.Refining txheej txheem: tuaj yeem sib tov zoo dua, nrawm dua, thiab sib npaug
Riam method: a. Slant riam method (yim riam txoj kev) b. Daim duab peb sab wrapping method c. Txoj kev ua haujlwm twisting d. Gluing method (kev taug kev riam txoj kev)
d.Cov qauv rau kev suav cov peev txheej ntawm lub tshuab qhib yog V = 0.0065 * D * L, qhov twg V - ntim D yog txoj kab uas hla ntawm cov menyuam (cm) thiab L yog qhov ntev ntawm cov menyuam (cm)
e.Qhov kub ntawm cov menyuam: 50-60 degrees
f.Lub sij hawm sib xyaw: Tsis muaj kev cai tshwj xeeb, nws nyob ntawm tus neeg teb xov tooj kev paub
(2)Internal mixer sib tov:
a.Ib theem sib xyaw: Tom qab ib theem ntawm kev sib tov, cov txheej txheem sib xyaw yog raws li hauv qab no: roj hmab raw → khoom me me → ntxiv tus neeg sawv cev → softener → roj hmab tawm → ntxiv cov sulfur thiab accelerator rau cov ntsiav tshuaj xovxwm → unloading → txias thiab nres
b.Kev sib xyaw thib ob: Kev sib xyaw ua ke hauv ob theem. Thawj theem yog cov roj hmab nyoos → khoom me me → tus neeg sawv cev txhawb nqa → softener → roj hmab tawm → ntsiav tshuaj nias → txias. Qhov thib ob theem yog niam roj hmab → sulfur thiab accelerator → ntsiav tshuaj nias → txias
(3)Cov teeb meem zoo sib xws nrog cov roj hmab sib xyaw
a.Compound agglomeration
Lub ntsiab yog vim li cas: tsis txaus refining ntawm raw roj hmab; Ntau tshaj cov menyuam suab; Muaj peev xwm nplaum ntau dhau; Cov menyuam kub ntau dhau; Cov hmoov sib xyaw muaj cov khoom ntxhib los yog pawg;
b.Ntau dhau los yog tsis txaus lub ntiajteb txawj nqus lossis tsis sib xws
Yog vim li cas: Tsis raug qhov hnyav ntawm tus neeg sawv cev sib xyaw, kev sib xyaw tsis raug, kev tso tseg, tsis raug ntxiv lossis tsis raug thaum sib xyaw
c.Txau Frost
Feem ntau yog vim kev siv ntau dhau ntawm cov khoom siv ntxiv, uas tshaj lawv cov solubility hauv roj hmab ntawm chav tsev kub. Thaum muaj cov dej dawb ntau dhau lawm, cov tshuaj dawb kuj yuav raug txau tawm, uas yog hu ua hmoov txau
d.Hardness siab dhau, qis dhau, tsis sib xws
Yog vim li cas yog tias qhov hnyav ntawm vulcanizing agents, accelerators, softeners, reinforcing agents, thiab raw roj hmab tsis yog, thiab nws yog tshwm sim los ntawm qhov tsis raug los yog tsis tau ntxiv, ua rau sib tov tsis sib xws thiab tsis sib xws hardness.
e.Hlawv: Qhov tshwm sim thaum ntxov vulcanization ntawm cov khoom siv roj hmab
Yog vim li cas: Kev sib xyaw ua ke tsis zoo ntawm cov khoom ntxiv; Kev sib xyaw roj hmab tsis raug; Kev ua kom txias thiab chaw nres tsheb tsis raug; Huab cua cuam tshuam, thiab lwm yam
3.Sulfurization
(1)Kev tsis txaus ntawm cov khoom siv
a.Cov huab cua nruab nrab ntawm cov pwm thiab roj hmab tsis tuaj yeem tso tawm
b.Qhov hnyav tsis txaus
c.Tsis txaus siab
d.Tsis zoo fluidity ntawm cov khoom siv roj hmab
e.Cov pwm kub ntau dhau thiab cov khoom siv roj hmab hlawv
f.Thaum ntxov scorching ntawm cov khoom siv roj hmab (cov khoom siv tuag)
g.Cov khoom tsis txaus thickness thiab tsis txaus txaus
(2)npuas thiab pores
a.Tsis txaus vulcanization
b.Tsis txaus siab
c.Impurities los yog roj stains nyob rau hauv cov pwm los yog cov khoom siv roj hmab
d.Lub vulcanization pwm kub yog siab dhau
e.Tsawg tus neeg sawv cev vulcanizing ntxiv, qhov ceev ntawm vulcanization qeeb dhau
(3)Cov tawv nqaij hnyav thiab tawg
a.Lub vulcanization ceev ceev heev, thiab cov roj hmab ntws tsis txaus
b.qias neeg pwm los yog nplaum stains
c.Kev cais ntau dhau lossis tso tawm tus neeg sawv cev
d.Tsis txaus thickness ntawm cov khoom nplaum
(4)Cov khoom demolding rupture
a.Cov pwm kub ntau dhau los yog raug cov tshuaj sulfur ntev
b.Ntau npaum li cas ntawm vulcanizing tus neeg sawv cev
c.Txoj kev demolding yog tsis raug
(5)Yooj yim rau txheej txheem
a.Lub zog tsim kua muag ntawm cov khoom yog zoo heev (xws li siab tensile nplaum). Qhov kev ua haujlwm nyuaj no yog tshwm sim los ntawm qhov tsis muaj peev xwm los rhuav tshem cov burrs
b.Lub zog ntawm cov khoom tsis zoo heev, tshwm sim raws li cov npoo nkig, uas tuaj yeem rhuav tshem cov khoom ua ke
Post lub sij hawm: Apr-16-2024
