Feem ntau ua rau lub sijhawm hloov pauv hauv cov txheej txheem kub khiav xws li: kub oscillations tshwm sim los ntawm qhov tsis sib haum PID tsis nyob hauv qhov ntsuas kub; sab nraud thermal cuam tshuam (xws li kev ua kom sov thaum lub sij hawm pwm qhib thiab kaw); siab pulsations tshwm sim los ntawm unbalanced melt flow; ncua sij hawm tso tawm ntawm cov khoom stagnation vim qhov chaw tuag los yog blockages nyob rau hauv tus khiav; thiab mechanical resonance.
I. Ua rau muaj feem cuam tshuam rau Kev Tswj Xyuas Kub
1. Tsis sib haum PID Control Parameters: Thaum lub zog cua sov thiab qhov kub thiab txias tswj algorithm tsis sib koom ua ke, ib qho kev sib tw ntawm "overheating → cooling → reheating" yuav tshwm sim.
Piv txwv li: Lub raj cua kub ntau dhau lub zog tab sis lagging PID cov lus teb ua rau lub sijhawm kub hloov pauv nyob ib puag ncig tus nqi.
2. Improper Sensor Installation or Lagging Response: Thermocouple probes not tightly attached to the runner wall or the sensing point being too far from the runner (>10mm) yuav ua rau kev tawm tswv yim qeeb thiab nquag them nyiaj los ntawm kev tswj hwm.
Qhov kub sib txawv ntawm ntau lub nozzles tuaj yeem ua rau muaj kev hloov pauv hauv lub xeev yaj ntawm txhua qhov kab noj hniav.
3. Kev faib tawm tsis sib xws ntawm cov khoom cua sov: Kev sib koom ua ke ntawm cov cua sov coils lossis lub zog tsis sib xws tuaj yeem ua rau muaj cua sov hauv cheeb tsam lossis qhov chaw txias hauv cov neeg khiav dej num, ua rau lub sijhawm tsis sib xws.
II. Sab nraud ib puag ncig thiab txheej txheem cuam tshuam
1. Periodic Thermal Disturbances los ntawm Pwm Qhib thiab Kaw: Ntau zaus pwm qhib thiab kaw ua rau muaj kev hloov pauv ntawm cov cua sov hauv lub sijhawm. Thaum tshav kub kub yog pauv mus rau lub kub khiav system nyob rau hauv ib tug fluctuating yam, cuam tshuam rau stability ntawm lub melt kub.
2. Kev cuam tshuam los ntawm Cov Cuab Yeej Cuab Yeej Pib- nce thiab kaw: Lub sijhawm qhib / tawm lub voj voog ntawm cov dej txias hloov pauv pwm lub thermal tshuav, cuam tshuam ncaj qha rau qhov kub khiav kub, tshwj xeeb tshaj yog pom nyob rau hauv ntev - voj voog molding.
3. Ambient Temperature Fluctuations: Loj diurnal kub variations nyob rau hauv lub rhiav los yog lub on / off ua hauj lwm ntawm cov cua txias yuav ua rau qeeb kub drift nyob rau hauv lub tshav kub hloov nruab nrab (xws li tshav kub hloov roj), uas, thaum ua ke, tsim ib tug periodic nyhuv.
III. Melt Flow thiab Pressure Factors
1. Imbalanced Filling in Multiple Cavities: Asymmetrical runner design los yog qhov sib txawv ntawm lub qhov rooj qhov ntev ua rau alternating filling sequences nyob rau hauv txhua kab noj hniav, ua rau lub sij hawm lub siab pulsations.
2. Screw Plasticization tsis sib npaug: Cov ntsia hlau hnav lossis kev hloov pauv hloov pauv ua rau lub sijhawm hloov pauv hauv cov viscosity yaj, cuam tshuam rau kev txhaj tshuaj sib xws thiab tshwm sim raws li kev txhaj tshuaj luv luv lossis flash txhua txhua N pwm khiav.
3. Variations nyob rau hauv Condensed Layer Thickness: Periodic thickening thiab tev ntawm cov condensed txheej nyob rau hauv lub puab phab ntsa ntawm lub kub khiav hloov qhov zoo ntws hla-section, ua rau lub siab hloov.
IV. Cov Qauv thiab Mechanical Factors
1. Cov ntsiab lus tuag lossis cov chaw nyob ruaj khov hauv cov neeg khiav dej num: Qhov tsis muaj kev hloov pauv ntawm cov ces kaum sib tw ua rau qhov chaw tuag, ua rau cov khoom stagnation thiab lub sij hawm thermal decomposition, tso coke los yog roj thiab cuam tshuam nrog cov dej ntws.
2. Periodic Solidification thiab Melting ntawm Solidified Plugs: Periodic solidification thiab melting ntawm cov khoom txias nyob ze ntawm lub rooj vag tsim ib lub voj voog "kev thaiv-" tso tawm, ua rau cov ntim ntim hloov pauv.
3. Mechanical Vibration lossis Resonance: Thaum txhaj tshuaj molding lub cev muaj zog nyob ze rau lub ntuj zaus ntawm cov qauv kub khiav, resonance yuav tshwm sim, ua rau synchronous oscillations nyob rau hauv qhov kub thiab txias.
