Plhaub moldingyog txheej txheem uas cov xuab zeb sib xyaw nrog cov thermosetting resin tau tso cai tuaj rau hauv kev sib cuag nrog cov khoom siv hlau ua kom sov, kom lub plhaub nyias thiab muaj zog ntawm pwm yog tsim nyob ib ncig ntawm lub pattem. Tom qab ntawd lub plhaub tau muab tshem tawm ntawm tus qauv thiab cov kev tiv thaiv thiab rub raug tshem tawm ua ke thiab khaws cia rau hauv lub khob nrog cov khoom tsim nyog rov qab thiab cov hlau molten yog nchuav rau hauv pwm.
Feem ntau, qhuav thiab nplua xuab zeb (90 mus rau 140 GFN) uas tsis muaj av nplaum yog siv los npaj lub plhaub molding xuab zeb. Lub grain loj yuav tsum tau xaiv nyob ntawm qhov chaw tiav xav tau ntawm lub casting. Zoo heev ib tug grain loj yuav tsum tau loj npaum li cas ntawm resin, uas ua rau cov pwm kim.
Cov khoom siv hluavtaws siv hauv plhaub molding yog qhov tseem ceeb ntawm cov thermosetting resins, uas tau hardened irreversibly los ntawm tshav kub. Cov resins feem ntau siv yog phenol formaldehyde resins. Ua ke nrog cov xuab zeb, lawv muaj zog heev thiab tiv taus cua sov. Cov phenolic resins siv hauv plhaub molding feem ntau yog ntawm ob theem hom, uas yog, cov resin muaj ntau tshaj phenol thiab ua zoo li cov khoom siv thermoplastic. Thaum lub sij hawm txheej nrog cov xuab zeb, cov resin yog ua ke nrog ib tug catalyst xws li hexa methylene tetramine (hexa) nyob rau hauv ib tug ratio ntawm 14 mus rau 16% thiaj li mus tsim lub thermosetting yam ntxwv. Qhov kub kho rau cov no yuav nyob ib puag ncig 150 C thiab lub sijhawm xav tau yuav yog 50 mus rau 60 vib nas this.
Qhov zoo ntawm Plhaub Pwm Casting txheej txheem
1.Plhaub-mouldsfeem ntau yog qhov tseeb ntau dua li cov xuab zeb castings. Nws yog ua tau kom tau txais kev kam rau siab ntawm +0.25 hli rau steel castings thiab +0. 35mm rau grey cam khwb cia hlau castings thiabhlau castingsnyob rau hauv ib txwm ua haujlwm. Nyob rau hauv cov ntaub ntawv ntawm ze rau lub plhaub pwm, ib tug yuav tau txais nws nyob rau hauv ntau ntawm +0.03 txog +0.13 hli rau tej daim ntawv thov.
2. Ib tug smoother nto yuav tau nyob rau hauv lub plhaub castings. Qhov no yog feem ntau ua tiav los ntawm cov finer loj grain siv. Qhov ntau yam ntawm roughness yog ntawm qhov kev txiav txim ntawm 3 mus rau 6 mircrons.
3. Draft cov ces kaum, uas yog qis dua qhov xuab zeb castings, yog xav tau nyob rau hauv plhaub pwm. Qhov kev txo qis hauv cov kaum sab xis tuaj yeem yog los ntawm 50 mus rau 75%, uas txo cov nqi ntawm cov khoom siv thiab cov nqi ua haujlwm tom ntej.
4. Qee zaum, cov cores tshwj xeeb yuav raug tshem tawm hauv plhaub molding. Txij li cov xuab zeb muaj lub zog siab, pwm tuaj yeem tsim tau raws li cov kab noj hniav sab hauv tuaj yeem tsim ncaj qha nrog qhov xav tau ntawm lub plhaub cores.
5. Tsis tas li ntawd, cov ntu nyias nyias (txog li 0.25 hli) ntawm hom cua txias lub tog raj kheej taub hau tuaj yeem ua tau yooj yim los ntawm lub plhaub molding vim lub zog ntau dua ntawm cov xuab zeb siv rau molding.
6. Permeability ntawm lub plhaub yog siab heev thiab yog li ntawd tsis muaj roj inclusions tshwm sim.
7. Cov xuab zeb me me heev yuav tsum tau siv.
8. Mechanization tau yooj yim ua tau vim yog kev ua haujlwm yooj yim koom nrog hauv plhaub molding.
Kev txwv ntawm Plhaub Pwm Casting txheej txheem
1. Cov pattens yog kim heev thiab yog li kev lag luam tsuas yog siv hauv kev tsim khoom loj. Nyob rau hauv daim ntawv thov raug, plhaub molding ua kev lag luam tshaj cov xuab zeb molding yog tias qhov yuav tsum tau tso tawm yog siab dua 15000 daim vim tus nqi ntau dua.
2. Qhov loj ntawm cov casting tau los ntawm lub plhaub molding yog txwv. Feem ntau, castings hnyav txog li 200 kg tuaj yeem ua tau, txawm tias me me, castings txog li 450 kg yog ua.
3. Cov duab nyuaj heev tsis tuaj yeem tau.
4. Cov khoom siv ntau dua yog xav tau rau kev tuav lub plhaub moldings xws li cov uas yuav tsum tau rau cov qauv hlau rhuab.
Post lub sij hawm: Dec-25-2020