dab tsi cuam tshuam tsis ua hauj lwm ntawm precision txhaj molding

Lub hauv paus rau kev txiav txim siab precision txhaj tshuaj molding yog qhov tseeb ntawm kev txhaj tshuaj molded khoom, yog, qhov ntev tolerances, geometric tolerances thiab nto roughness ntawm cov khoom.

Txhawm rau ua tiav qhov kev txhaj tshuaj molding, yuav tsum muaj ntau yam xwm txheej, thiab qhov tseem ceeb tshaj plaws yog plaub yam tseem ceeb ntawm cov ntaub ntawv yas, txhaj tshuaj pwm, txhaj tshuaj molding txheej txheem thiab txhaj tshuaj molding khoom.

Thaum tsim cov khoom yas, engineering cov ntaub ntawv yas yuav tsum tau xaiv ua ntej, thiab engineering yas uas tuaj yeem raug txhaj tshuaj molded yuav tsum xaiv cov ntaub ntawv uas muaj cov khoom siv tshuab siab, seem stability, zoo creep kuj, thiab ib puag ncig kev nyuaj siab cracking kuj.

Thib ob, qhov tsim nyog Tuam Tshoj txhaj tshuaj molding tshuab yuav tsum tau xaiv raws li cov khoom yas xaiv, tiav cov khoom seem qhov tseeb, qhov hnyav, kev xav tau zoo thiab xav tau pwm qauv.

Nyob rau hauv tus txheej txheem ntawm kev ua, cov yam tseem ceeb uas cuam tshuam rau precision txhaj molded khoom feem ntau yog los ntawm qhov tseeb ntawm cov pwm, txhaj tshuaj shrinkage, thiab qhov ntau ntawm kev hloov pauv ntawm ib puag ncig qhov kub thiab av noo ntawm cov khoom.

Hauv precision txhaj tshuaj molding, cov pwm yog ib qho ntawm cov yuam sij kom tau txais cov khoom yas precision uas ua tau raws li qhov yuav tsum tau ua. Cov pwm siv rau kev txhaj tshuaj molding yuav tsum ua tau raws li qhov xav tau ntawm cov khoom loj, raug thiab zoo.

Tab sis txawm tias qhov tseeb thiab qhov loj ntawm cov pwm yog tib yam, qhov loj ntawm cov khoom yas molded yuav tsis sib haum vim qhov sib txawv ntawm shrinkage. Yog li ntawd, Nws yog ib qho tseem ceeb heev kom tswj tau qhov shrinkage tus nqi ntawm cov khoom yas hauv precision txhaj molding tshuab.

Txawm hais tias tus qauv tsim pwm tsim nyog lossis tsis ncaj qha cuam tshuam rau tus nqi shrinkage ntawm cov khoom yas. Vim tias qhov loj ntawm cov pwm kab noj hniav yog xam los ntawm kev ntxiv qhov kwv yees shrinkage tus nqi rau qhov loj ntawm cov khoom yas, tus nqi shrinkage yog pom zoo los ntawm cov chaw tsim khoom yas lossis engineering plastics phau ntawv.

Nws tsis yog tsuas yog cuam tshuam nrog lub rooj vag daim ntawv, rooj vag txoj hauj lwm thiab kev faib cov pwm, tab sis kuj mus rau crystal orientation (anisotropy) ntawm engineering plastics, cov duab thiab qhov loj ntawm cov khoom yas, qhov kev ncua deb mus rau lub rooj vag thiab qhov chaw muaj feem xyuam.
Rau
Lub ntsiab tseem ceeb uas cuam tshuam rau cov yas shrinkage yog thermal shrinkage, theem hloov shrinkage, orientation shrinkage, compression shrinkage, thiab elastic rov qab. Cov kev cuam tshuam no cuam tshuam nrog cov txheej txheem molding lossis kev ua haujlwm ntawm precision txhaj molded khoom.

Yog li ntawd, Kev sib raug zoo ntawm cov kev cuam tshuam no thiab kev txhaj tshuaj thiab lawv cov tsos mob yuav tsum tau txiav txim siab thaum tsim pwm, xws li txhaj tshuaj siab thiab kab noj hniav siab thiab filling ceev, txhaj tshuaj melt kub thiab pwm kub, pwm qauv thiab rooj vag daim ntawv thiab faib , Thiab qhov cuam tshuam ntawm yam xws li rooj vag hla ntu ntu, khoom phab ntsa thickness, txhawb nqa cov ntsiab lus hauv cov ntaub ntawv yas, crystallinity thiab orientation ntawm cov ntaub ntawv yas.

Kev cuam tshuam ntawm cov yam ntxwv saum toj no kuj txawv vim yog cov khoom siv yas sib txawv, lwm yam molding tej yam kev mob xws li kub, av noo, txuas ntxiv crystallization, internal stress tom qab molding, thiab kev hloov pauv hauv kev txhaj tshuaj molding tshuab. Rau

Vim tias cov txheej txheem txhaj tshuaj molding yog txheej txheem ntawm kev hloov cov yas los ntawm cov khoom (hmoov los yog pellets) ua kua (yaj) kom khov (khoom). Los ntawm pellets mus rau yaj, thiab tom qab ntawd los ntawm yaj mus rau cov khoom, qhov kub thiab txias, teb kev nyuaj siab, ntws teb, thiab qhov ntom ntom yog nyob nruab nrab.

Raws li kev sib koom ua ke ntawm cov teb no, txawv plastics (thermosetting los yog thermoplasticity, crystallinity) Los yog tsis-crystalline, reinforced los yog non-reinforced, lwm yam.) muaj qhov sib txawv ntawm cov txheej txheem polymer morphology thiab rheological zog.
Txhua yam uas cuam tshuam rau cov lus hais saum toj no “teb” yuav yeej muaj feem xyuam rau lub cev thiab mechanical zog, qhov loj, lub cev, precision thiab tsos zoo ntawm cov khoom yas.

Ua li no, lub internal kev twb kev txuas ntawm txheej txheem txheej txheem thiab polymer cov khoom, Cov txheej txheem morphology thiab cov khoom yas yuav tshwm sim los ntawm cov khoom yas. Kev tsom xam meej ntawm cov kev sib txuas sab hauv no yog qhov tseem ceeb heev rau kev tsim cov txheej txheem txhaj tshuaj molding, rationally tsim thiab tsim pwm raws li kos duab, thiab txawm tias rationally xaiv cov khoom siv txhaj tshuaj molding.

Precision txhaj tshuaj molding thiab zoo tib yam txhaj tshuaj molding kuj txawv nyob rau hauv kev txhaj tshuaj siab thiab txhaj tshuaj npaum li cas. Precision txhaj molding feem ntau siv high-pressure los yog ultra-high-pressure txhaj thiab high-speed txhaj kom tau ib tug me me pwm shrinkage tus nqi.
Rau
Raws li cov laj thawj saum toj no, ntxiv rau cov qauv tsim pwm dav dav, cov ntsiab lus hauv qab no yuav tsum tau txiav txim siab thaum tsim precision txhaj pwm:
① Siv cov pwm pwm tsim nyog;
② Tiv thaiv molding shrinkage yuam kev;
③ Tiv thaiv kev txhaj tshuaj deformation;
④ Tiv thaiv kom tsis txhob deformation;
⑤ Txo qhov kev tsim pwm ua yuam kev;
⑥ Tiv thaiv qhov tsis raug ntawm pwm raug;
⑦ Khaws qhov tseeb ntawm cov pwm.

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