Yog vim li cas rau cracking ntawm cov khoom yas

(1) Cracking tshwm sim los ntawm residual stress
Qhov kev ntxhov siab ntawm cov yas txhaj tshuaj pwm manufacturers feem ntau yog tshwm sim los ntawm cov nram qab no peb yam mob, uas yog, overfilling, demoulding thiab hlau inserts. Raws li cov kab nrib pleb tshwm sim los ntawm overfilling, qhov kev daws teeb meem tuaj yeem yog nyob rau hauv cov hauv qab no:
(1) Vim tias qhov poob siab ntawm lub rooj vag ncaj yog me me, yog tias qhov tawg feem ntau tshwm sim nyob ze ntawm lub rooj vag ncaj, lub rooj vag ntau qhov rooj, sab rooj vag thiab rooj vag tuaj yeem raug txiav txim siab.
(2) Nyob rau ntawm qhov chaw ua kom ntseeg tau tias cov resin tsis decompose thiab deteriorate, ua kom cov resin kub kom zoo tuaj yeem txo cov yaj viscosity, txhim kho fluidity, thiab kuj txo qhov kev txhaj tshuaj kom txo tau qhov kev ntxhov siab.
(3) Cov yas txhaj tshuaj pwm ua cov chaw tsim khoom tau taw qhia tias feem ntau, qhov kev ntxhov siab yog ib qho yooj yim tshwm sim thaum pwm kub qis, thiab qhov kub thiab txias yuav tsum tsim nyog. Txawm li cas los xij, thaum txhaj tshuaj nrawm dua, txawm tias pwm kub qis dua, qhov kev ntxhov siab tuaj yeem txo.
(4) Yog tias qhov kev txhaj tshuaj thiab lub sijhawm tuav lub sijhawm ntev dhau lawm, nws tseem yuav ua rau muaj kev ntxhov siab, yog li ua kom nws luv luv los yog ua tiav ntau lub zog tuav hloov pauv.
(5) Cov khoom siv uas tsis yog siv lead ua, xws li AS resin, ABS resin, PMMA resin, thiab lwm yam, feem ntau yuav tsim kev ntxhov siab ntau dua li crystalline resins, xws li polyethylene thiab polyformaldehyde, uas yuav tsum tau sau tseg.
Thaum cov yas txhaj tshuaj pwm ua lub Hoobkas tso cov pwm, vim yog lub kaum sab xis me me, cov kua nplaum pwm thiab cov punch ntxhib, lub ejection quab yuam loj dhau, ua rau muaj kev ntxhov siab, thiab qee zaum txawm tias dawb los yog tawg ib ncig ntawm ejection pas nrig. Qhov ua rau tuaj yeem txiav txim siab los ntawm kev ua tib zoo saib qhov chaw ntawm kev tawg.
Thaum cov yas txhaj tshuaj pwm manufacturers ntxig hlau qhov chaw thaum txhaj tshuaj molding, nws yog ib qho yooj yim los tsim kev ntxhov siab thiab tawg tom qab ib lub sij hawm, uas yog heev teeb meem. Qhov no feem ntau yog vim qhov sib txawv ntawm qhov sib txawv ntawm thermal expansion coefficient ntawm hlau thiab resin, uas ua rau muaj kev ntxhov siab, thiab dhau sij hawm, qhov kev ntxhov siab dhau ntawm lub zog ntawm cov khoom siv maj mam deteriorated resin thiab ua rau tawg.
(2) Kev tawg los ntawm kev ntxhov siab sab nraud
Qhov kev ntxhov siab sab nraud ntawm no feem ntau yog tshwm sim los ntawm kev ntxhov siab vim yog qhov tsim tsis tsim nyog, tshwj xeeb tshaj yog ntawm cov ces kaum ntse.
(3) Kev tawg los ntawm ib puag ncig sab nraud
Cov dej degradation tshwm sim los ntawm cov tshuaj lom neeg, kev nqus dej noo, thiab kev siv cov khoom siv ntau dhau yuav ua rau lub cev tsis zoo thiab ua rau tawg.