1. Kauv kabyas scorch
Yas scorch yog ib qho kev tsis zoo nyob rau hauv cov txheej txheem yas extrusion, thiab nws cov ntsiab lus tshwm sim yog: qhov kub thiab txias tsis tshua muaj siab; txheej yas extruded muaj coke hais; muaj cov npuas txuas ntxiv ntawm cov kua nplaum sib txuas. Cov laj thawj tseem ceeb rau qhov no yog: kev tswj qhov kub thiab txias yog siab npaum li lub thermal degradation kub ntawm cov yas; cov ntsia hlau tsis tau raug ntxuav rau lub sijhawm ntev, thiab cov scorch sib xyaw yog extruded nrog cov yas molten; lub sijhawm cua sov lossis lub sijhawm kaw yog ntev heev kom cov yas hauv lub thoob yuav decomposed los ntawm cov cua sov mus ntev. ; Lub ntsuas kub tswj tsis tau tswj los yog tsis raug, ua rau kub kub decomposition.
2. Tsis zoo plasticization ntawm extrudate
Qhov teeb meem ntawm plasticization tau hais nyob rau hauv cov kev cai tswj qhov kub thiab txias tau hais ua ntej. Feem ntau, cov yas tsis zoo yog feem ntau tshwm sim raws li qhov saum npoo ntawm cov yas extruded yog dub, npub, thiab muaj cov kab nrib pleb me me; txheej extruded muaj cov cim pom tseeb ntawm cov kua nplaum. Seam; unstandardized kub tswj ntawm kauv cable yog lub ntsiab ua rau tsis zoo plasticization ntawm extrudates, nrog rau kev tswj kub yog tsawg heev; lwm cov khoom yas ntawm cov khoom sib txawv yog sib xyaw hauv cov khoom siv rwb thaiv tsev lossis cov ntaub qhwv; cov ntsia hlau tig ceev heev, Cov yas tsis tau ua tiav plasticized; cov yas nws tus kheej muaj teeb meem zoo.
3. Muaj cov pores los yog npuas nyob rau hauv seem ntawm txheej squeezed
Cov laj thawj tseem ceeb ntawm kev tsim cov pores los yog npuas nyob rau hauv seem extruded txheej muaj xws li: kev tswj kub ntau dhau (tshwj xeeb tshaj yog nyob rau hauv seem pub); yas damp thiab noo noo; mus ntev chaw nres tsheb, decomposing cov yas tab sis tsis tshem nws; high humidity nyob rau hauv ib puag ncig ntuj; hauv cov tub ntxhais cable Cov ntsiab lus ntawm cov dej los yog vapor siab dhau lawm.
4. Lub pob nyem loj yog tsis tsim nyog
Qhov loj tsis tsim nyog ntawm lub pob extruded feem ntau yog tshwm sim raws li eccentricity, sheath thickness, thiab txheej kab uas hla ntawm kev kam rau siab. Cov laj thawj tseem ceeb yog raws li nram no: lub extrusion thiab traction ceev tsis ruaj khov; sab nraud ntawm cov tub ntxhais cable hloov ntau dhau; extrusion kub yog siab dhau lawm thiab lub ntim extrusion txo; ntau impurities hauv cov yas thaiv cov ntxaij lim dej kom txo cov yas ntws; Lub nro ntawm cov xov tsis ruaj khov; cov tub ntxhais pwm yog xaiv loj heev (extrusion hom) los yog qhov ntev ntawm cov tub ntxhais kab cheeb tsam yog luv luv thiab eccentric; qhov sib txawv pwm tsis raug xaiv kom raug; qhov kub ntawm lub taub hau extruder tsis sib npaug; lub concentricity ntawm extrusion tuag Tsis kho zoo; qhov kub ntawm qhov pub nkag yog siab dhau los ua rau cov khoom noj tsis yooj yim cuam tshuam rau cov khoom ntws thiab lwm yam.
5. Adhesive zog ntawm longitudinal daim kab xev yog tsis tsim nyog
Lub ntsiab yog vim li cas rau lub unqualified bonding zog ntawm lub longitudinal daim kab xev ntawm kauv cable yog: qhov kub ntawm lub extrudate yog tsawg heev; qhov ceev ntawm cov kab ntau lawm yog ceev heev kom lub sheath yog sai txias; qhov kub ntawm lub tank dej kub yog tsawg heev thiab nws yog ze rau qhov tuag; Lub stretch ratio yog me me, los yog cov pwm txuam yog tsis tsim nyog, ua rau nws tsim ib tug xoob pob; lub melting point ntawm cov zaj duab xis composite nrog longitudinal daim kab xev yog siab dhau lawm;
6. Cov tsos ntawm lub pob nyem yog tsis tsim nyog
Qhov tsis tsim nyog ntawm lub pob extruded yog feem ntau tshwm sim raws li khawb ntawm qhov chaw ntawm txheej extruded; roughness ntawm kauv cable nrog trachoma los yog microcracks; tej yam tsis xws luag los ntawm cov yas tsis zoo. Qhov laj thawj tseem ceeb yog: qhov kev xaiv ntawm extrusion tuag tes tsho yog tsis tsim nyog. Cov impurities nyob rau hauv lub extrusion tuag tes tsho yog daig thiab khawb qhov chaw ntawm lub sheath. Cov cua kub ntau dhau ntawm lub taub hau extruder ua rau roughness lossis kub qis dhau ua rau micro-cracks; lub tes tsho tuag sizing cheeb tsam puas lawm; lub sheath yog khawb hauv lub dab dej, thiab lwm yam.
