Raws li txoj kev xav molding, lub ntsiab yog vim li cas rau brittleness ntawm txhaj tshuaj molded qhov chaw yog cov kev taw qhia ntawm lub hauv paus molecules, ntau residual sab hauv kev nyuaj siab, thiab lwm yam. Yog hais tias cov txhaj molded qhov chaw muaj dej inclusion kab, qhov teeb meem yuav phem dua.
Yog li ntawd, nws yog ib qho tsim nyog yuav tsum tswj cov pwm kub thiab yaj kub kom txo tau cov brittleness ntawm kev txhaj tshuaj molded qhov chaw thaum tsim loj.txhaj tshuaj molded qhov chaw.Tsis tas li ntawd, nws tseem yuav pab tau kom txo tau lub siab los ntawm kev ua kom cov kev txhaj tshuaj nrawm.Vim tias qhov ceev yog tsawg, cov cua kub dissipation ntawm cov kua nplaum yaj yuav nce siab heev, thiab qhov kub thiab txias yuav poob ntau dhau.Nws yog khi kom yuav tsum tau ntau dua cov kua nplaum txhaj tshuaj kom sau cov kab noj hniav.
Txhawm rau kom ruaj khov thiab tsim nyog cov khoom lag luam zoo, thaum pib ntawm kev tsim khoom, txij li qhov kub ntawm qhovtxhaj tshuaj pwmtseem tsis tau nce, nws yog qhov zoo dua tsis txhob siv thawj 20 txhaj tshuaj molded qhov chaw, vim tias lawv kuj nkig, tshwj xeeb tshaj yog cov tshuaj molded qhov chaw nrog me ntsis brittleness, xws li hluav taws kub retardant, yuav tsum muaj ntau tshaj 30 daim.
Cov huab cua kuj muaj kev cuam tshuam zoo rau lub brittleness ntawm qhov loj txhaj tshuaj molded qhov chaw.Thaum huab cua txias los, peb yuav pom tias muaj ntau qhov kev txhaj tshuaj molded qhov chaw uas ib txwm ua, xws liPP, ABS, PC, K cov ntaub ntawv thiab lwm qhov chaw uas muaj kev cuam tshuam zoo, dheev ua nkig.Qee zaum txawm tias cov khoom me me tuaj yeem raug tshuab tawm, yog li lawv feem ntau rov qab los ntawm cov neeg siv khoom.
Txhawm rau tshem tawm cov kev cuam tshuam ntawm kev ntxhov siab ntau dhau ntawm sab hauv thiab kev taw qhia ntawm molecular loj ntawm brittleness ntawm kev txhaj tshuaj molded qhov chaw, kev kho cua sov ntawm kev txhaj tshuaj molded qhov chaw yog qhov kev ntsuas zoo los tiv thaiv brittleness.
Txhawm rau kom ntseeg tau qhov kev ntseeg siab ntawm cov khoom nyob rau lub caij ntuj no, yog tias cov khoom tsim tau tso cai, thiab tag nrho cov kev ntsuam xyuas tau tsim nyog, cov ntaub ntawv hloov tau yooj yim sib xws nrog cov khoom siv raw yog ntxiv rau cov khoom siv raw, xws li cov khoom me me ntawm EVA hauv PP. cov khoom siv, me me ntawm cov khoom siv K hauv cov khoom siv HIPS, thiab lwm yam, uas yog ib qho kev daws teeb meem zoo los tiv thaiv brittleness ntawm kev txhaj tshuaj molded qhov chaw.
Yog vim li cas rau brittleness ntawm loj txhaj molded qhov chaw:
1. Cov kua nplaum txhaj tshuaj siab;
2. Thaum lub sij hawm mold filling, kub poob sai heev;
3. Cov molecules sab hauv yog txheej txheem directionally, thiab cov residual internal stress yog loj heev;
Anti brittleness ntsuas:
1. Khaws cov pwm kub thiab yaj kub;
2. Ua kom cov kua nplaum txhaj tshuaj nrawm;
3. Thawj 20 txhaj tshuaj molded qhov chaw yuav tsum tsis txhob siv;
4. Ntxiv qhov kev sim ntawm qhov cuam tshuam ntawm huab cua hloov pauv;
5. Kev kho cua sov;
6. Tsis txhob tiv tauj thiab mus cuag corrosive hnyav lossis ib puag ncig;
7. Muab cov ntaub ntawv hloov tau yooj yim sib xws nrog cov khoom siv raw rau hauv cov khoom siv raw khoom.
Post lub sij hawm: Nov-08-2022