Vim li cas cov kab dub tshwm ntau zaus hauv extruder? Kab lus no qhia koj yuav ua li cas txiav txim siab sai sai seb nws yog tshwm sim los ntawm qhov teeb meem ntawm lub thoob los yog ntsia hlau.

Feem ntau cov kab dub ntawm extruders feem ntau tshwm sim los ntawm cov khoom siv raw khoom, cov pa roj carbon deposits ntawm cov khoom siv, thiab cov khoom hnav. Cov teeb meem no yuav tsum tau tshawb nrhiav thiab nrhiav raws li cov kauj ruam hauv qab no.

1. Cov khoom siv raw thiab cov khoom siv pab cuam teeb meem

Qhov no yog qhov laj thawj tshaj plaws thiab yuav tsum tau ua ntej.

Raw khoom impurities: Dub txawv teb chaws teeb meem, xws li plua plav, hlau khib nyiab, los yog lwm yam masterbatches, tej zaum yuav nkag mus rau hauv cov ntaub ntawv raw thaum lub sij hawm tsim khoom, cia, los yog kev thauj mus los.

Raw khoom ya raws los yog degradation: Cov dej noo ntau dhau ntawm cov ntaub ntawv raw tuaj yeem ua rau carbonization thaum kub kub extrusion, ua rau dub specks. Degradation los ntawm kev cia ntev kuj tuaj yeem ua rau cov khoom siv dub charred.

Masterbatch los yog additive teeb meem: Tsis zoo dispersion ntawm tus masterbatch yuav ua rau dub agglomerated hais. Kev sib ntxiv ntawm cov tshuaj ntxiv (xws li antioxidants) tuaj yeem ua rau carbonization ntawm qhov kub thiab txias.

2. Carbon deposits nyob rau hauv cov khoom siv: Tom qab siv mus ntev, cov khoom seem yuav yooj yim nyob hauv lub thoob, ntsia hlau, los yog pwm, ua rau carbonization thiab tsim cov kab dub.

Kev tu tsis tiav thaum lub sijhawm poob: cov khoom seem hauv lub thoob thiab cov ntsia hlau tsis huv tom qab kev khiav dhau los. Thaum lub tshuab rov pib dua, cov khoom seem no carbonizes ntawm qhov kub thiab txias thiab sib xyaw nrog cov khoom tshiab. Kev tsim khoom tsis raug cai: Extrusion kub siab dhau lawm, tshaj qhov thermal stability kub ntawm cov khoom siv raw, ua rau overheating thiab carbonization hauv chim.

Ntsia hlau ceev tsis sib haum nrog tus nqi pub: Kev pub ceev qeeb dhau, thaum ntsia hlau ceev nrawm dhau, ua rau cov khoom nyob hauv lub thoob ntev dhau, ua rau thermal degradation thiab carbonization.

3. Cov khoom siv hnav lossis tsis ua haujlwm

Cov khib nyiab hlau los ntawm cov khoom hnav los yog impurities qhia los ntawm cov ntsaws ruaj ruaj puas tuaj yeem ua rau cov kab dub.

Screw thiab Barrel Wear: Tom qab siv tau ntev, qhov sib txawv ntawm qhovntsia hlau thiab chimnce, ua rau nws yooj yim rau cov khoom yuav raug daig thiab carbonized nyob rau hauv qhov sib txawv. Cov hmoov hlau tsim los ntawm kev hnav tuaj yeem sib xyaw rau hauv cov khoom siv, tsim cov kab dub.

Pwm Teeb meem: Cov pa roj carbon deposits los yog khawb hauv cov pwm ntws channel tuaj yeem ua rau cov khoom raug daig thiab carbonized thaum khiav. Kev puas tsuaj pwm cov ntsaws ruaj ruaj tuaj yeem tso cai rau lwm cov impurities nkag mus rau hauv cov dej ntws.

Filter Clog lossis Kev puas tsuaj: Cov lim dej uas tsis tau hloov lub sijhawm ntev tuaj yeem ua rau txhaws, ua rau cov khoom siv tsis zoo thiab cov cua sov hauv cheeb tsam thiab carbonization. Cov lim dej puas tuaj yeem tso cai rau cov impurities nkag mus rau hauv pwm ncaj qha. Nws raug nquahu kom kuaj xyuas hauv qhov kev txiav txim ntawm "cov khoom siv raw → cov khoom siv tu → accessories tshuaj xyuas". Ua ntej hloov ib pawg ntawm cov khoom siv tshiab rau kev sim. Tom qab tshem tawm cov teeb meem raw khoom, disassemble thiab ntxuav lub thoob, ntsia hlau thiab pwm, thiab thaum kawg xyuas cov xwm txheej ntawm accessories xws li cov ntsia hlau thiab lim.

Raws li cov yas yaj ua rau tag nrho cov txheej txheem ntawm conveying, compressing, thiab melting hauvcov ntsia hlau, txawm tias qhov me me ntawm qhov chaw tsis zoo tuaj yeem dhau los ua qhov chaw yug me nyuam rau cov kab dub. Qhov saum npoo roughness muaj nyob rau hauv cov pa screws ua rau nws yooj yim rau cov khoom los ua rau hauv cov xov khoob thaum lub sij hawm kev sib hloov ceev. Qhov no, ua ke nrog rov ua cua sov, tsim cov khoom siv hluav taws xob, thaum kawg ua rau cov kab dub hauv cov khoom tiav.

Kev xaiv cov khoom siv kuj tseem ceeb heev. Peb cov ntsia hlau yog ua los ntawm cov khoom zoo 38CrMoALA nitrided alloy hlau. Qhov no tau ua tiav xya-hnub quenching thiab nitriding kev kho mob, uas ua rau 0.50-0.70mm tuab nitrided txheej thiab ib tug deg hardness ntawm HV950-1050. Cov khoom siv no ua kom muaj kev tiv thaiv zoo heev txawm tias qhov kub thiab txias nyob ib puag ncig 200 ° C, txuas ntxiv cov ntsia hlau lub neej kev pab cuam tsawg kawg yog ib feem tsib piv rau cov khoom siv. Qhov no tiv thaiv cov khoom tsim nyob rau hauv cov ces kaum tuag vim qhov chaw hnav dhau kev siv txuas ntxiv.

Los ntawm precision machining, cov ntsia hlau ua tiav daim iav-qib nto tiav ntawm Ra0.4 microns, ob peb zaug siab dua li tus qauv kev lag luam. Qhov no txhais tau tias qhov sib txawv ntawm qhov siab tsis ntau tshaj 0.4 microns ib millimeter ntawm cov ntsia hlau nto ntev, tsuas yog 1/200th ntawm txoj kab uas hla ntawm tib neeg cov plaub hau. Qhov saum npoo ultra-ntu no txo ​​qhov kev pheej hmoo ntawm cov khoom khaws cia thiab tshem tawm txoj hauv kev rau cov streaks dub hauv thawj qhov chaw.