[Abstract] Los ntawm cov kab lus, kab lus no nthuav qhia cov teeb meem ntawm kev txhim kho cov tsis xws luag ntawmpuab ib sabs, thiab cov ntsiab lus tseem ceeb yog yuav ua li cas thov moulding trace technology los txhim kho ntau yam tsis xws luag ntawm pwm qhov. Ntawd yog hais, los ntawm kev txheeb xyuas, kev txheeb xyuas thiab kev txhais cov ntau molding kab ntawm cov teeb meem; Yog li txhawm rau kom paub qhov ua rau muaj kev tsis txaus siab hauv kev txhaj tshuaj molding; Tom qab ntawd nrhiav txoj hauv kev los kho qhov tsis xws ntawm cov pwm ntawm qhov chaw, thiaj li ua tiav lub hom phiaj ntawm radically kho qhov tsis xws ntawm qhov chaw ntawm cov pwm; Nws kuj tseem ua pov thawj pom tias cov tshuab mooj molding tshuab tuaj yeem siv los kho txhua yam tsis xws ntawm pwm qhov chaw. Cov cim ntaus cim ntawm cov ntu tsim yog cov ntsiab lus tseeb. Lo lus nug yog yuav ua li cas thiaj li thov siv cov kev ua cim ntawm cov thev naus laus zis los tshuaj xyuas qhov tsis xws ntawm cov qhov chaw tsim. Lub rooj plaub muab qee qhov kev txawj ntse thiab txoj hauv kev los daws qhov tsis xws ntawm pwm qhov chaw los ntawm kev thov moulding kab tshuab.
Cov lo lus tseem ceeb: kev ua lag luam moulding mark moulding kos tshuab los txhim kho qhov luv luv ntawm cov khoom muaj txiaj ntsig
[Hloov Ua Lag Luam]: Los ntawm kev qhia tsib tsib qhov hais txog kev txiav txim siab molding kev kho tsis haum, cov kab lus no qhia tau tias yuav kho cov teeb meem molding li cas los ntawm kev siv cov txheej txheem molding kab. Hauv lwm lo lus, vim li cas kev txhaj tshuaj moulding tuaj yeem nrhiav tau los ntawm kev txheeb xyuas, kev txheeb xyuas thiab kev txhais cov ntsiab lus molding ntawm kev tawm pwm; los ntawm kev ua li ntawd, cov qauv siv tshaj plaws tuaj yeem nrhiav kev txhim kho moulding tsis xws luag; Nws tseem ua pov thawj tias ntau yam molding tsis xws luag tuaj yeem hloov kho tag nrho los ntawm txheej txheem molding kab. Nws yog lub hom phiaj tseeb tias molding cov kab muaj nyob ntawm m oulds, cov lus nug yog li cas peb siv cov txheej txheem kab los soj ntsuam moulding tsis xws luag? Lub rooj plaub moulding muaj cov txheej txheem thiab cov hau kev los kho cov pwm tsis xws luag lub hauv paus ntawm molding txheej txheem txheej txheem.
Cov ntsiab lus: molding kab, molding txheej txheem cov txheej txheem, qhov tsis xws tshuaj kho, cov khoom lag luam zoo
1 Taw qhia
Cov kab pwm tsim tshiab txhaj tshuaj yuav tsum tau sim coj mus kuaj seb cov pwm puas tsim nyog. Txawm li cas los xij, muaj ntau yam rau kev txiav txim siab seb puas muaj pwm. Muaj cov yam ntxwv ntawm cov qauv tsim qauv thiab cov qauv; Muaj ntau yam ua pwm tsim thiab tsim khoom; Muaj ntau yam ntawm cov khoom siv yas ua khoom siv; Muaj ntau yam ntawm kev xaiv ntawm cov cuab yeej siv tshuab; Muaj ntau yam rau xaiv cov txheej txheem molding cov txheej txheem; Muaj kuj muaj cov laj thawj ntawm kev kho mob ua ntej thiab tom qab kho ntawm cov khoom seem yas. Yog tias peb xav pom qhov tsis txaus siab uas cuam tshuam rau cov teeb meem hauv cov ntawv ntsuas, peb tuaj yeem nrhiav qhov tseeb ua rau muaj qhov tsis xws luag los ntawm kev pom qhov txawv thiab tshawb xyuas qhov pwm ntawm qhov chaw nyob sab nraud thiab sab hauv ntawm qhov teeb meem. Thaum kawg, peb tuaj yeem nrhiav cov kev ntsuas los daws cov kev tsis zoo thiab daws lawv yooj yim. Vim tias, cov xwm txheej ua rau cov kev tsis txaus siab nyob rau hauv cov txheej txheem tsim cov ntu ntawm cov yas ib txwm tso ib co kab rau ntawm cov yas. Cov kos duab moulding no yog lub hauv paus zoo tshaj plaws rau peb los tshawb xyuas thiab daws qhov tsis txaus siab ntawm cov teeb meem ntu.
2 Qhov Xwm Txheej 1: Txheeb xyuas cov khoom yas thiab cov tub ntxhais sib xyaw ua raws li cov kev pabcuam thiab cov kab ntawm lub qhov pwm
2.1 cov lus qhia ntawm pwm qhov
Lub npe thiab cov khoom sib xyaw ua haujlwm ntawm molded: Hloov mus sib dhos, uas muaj ntu loj 1 thiab ntu me 2, thiab peb kab ntawv txuas 3 yog ntsia rau ntawm ntu loj 1, raws li qhia hauv daim duab (1). Cov khoom no yog qhov hloov pauv-hloov mus rau ntawm cov neeg kho tshuab txhais tes rau hauv cov kab ntau lawm, uas txuas nrog cua qhov chaw, thiab nws cov kev ua haujlwm siab yog 3 cua, yog li nws yuav tsum ua tiav ob txoj kev hloov ntawm 26 degrees. Nws yog ib cheeb tsam xa tawm hom khoom lag luam, thiab nws yuav tsum hloov pauv tau nrog cov khoom lag luam txawv tom qab kev ib cheeb tsam.
2.2 cov kev cai ntawm pwm qhov chaw
Muaj xya lub qhov muaj 1-φ14H8 mm, 3-φ6G7 mm thiab 3-φ4H8 mm rau qhov loj, thiab plaub lub qhov nrog 1-φ14H8 mm thiab 3-φ6G7 mm rau tej daim me me. Qhov ntsuas qhov tseeb ntawm lub qhov siab, thiab lub taper thiab ov ov tsis tuaj yeem siab dua 0.01 hli Tsis li, lub pob hluav taws xob hloov pauv hloov tau yooj yim rau qhov cua thiab tsis tuaj yeem tswj tau 3 qhov chaw, thiab cov neeg siv dag zog tsis tuaj yeem ua haujlwm ib txwm. Tom qab qhov loj thiab cov me me sib koom ua ke, xya qhov yuav tsum ua tib coaxiality, cov pob qij txha yuav tsum tsis xau huab cua, thiab peb Φ ．1．8 mm qhov cua ntawm qhov sib khi yuav tsum tsis txhob muaj qhov tshwm sim ntawm kev sib tham thiab roj thaiv, thiab muaj qee yam zog. Qhov saum npoo ntawm cov khoom yog matt, du thiab muag heev.
2.3 cov khoom mob ntawm molded qhov chaw
Vim tias cov khoom siv ntawm cov ntu tshwj tsis meej, cov chaw tsim khoom siv thawj zaug siv PTFE los kuaj qhov pwm, thiab ntau yam teeb meem tshwm sim.
2.4 cov xwm txheej ntawm cov teeb meem ntu
Polytetrafluoroethylene nrog ntsws ntawm 3.1 ~ 7.7%. Ntws cov qhab nia yog qhov loj thiab ntau heev, kev tawm tsam thiab deformation yog qhov loj, qhov ntxhib ntawm qhov sib khi nto dhau 0.4 hli, qhov sib txawv ntawm ob daim yog 0.7 ~ 0.8 hli, thiab ov ov thiab taper ntawm xya qhov kuj tseem loj heev, uas tsis tuaj yeem ua tau raws li kev siv thoob plaws.
2.5 txoj kev npaj khomob
Nws yog qhov tsim nyog los txheeb xyuas cov khoom ntawm cov khoom seem thiab cov sib xyaw ua ke, thiab tom qab ntawd siv cov qauv ntawm kev xaiv cov cuab yeej txhaj uas tsim nyog thiab kho cov txheej txheem kev txhaj tshuaj kom txo tau cov ntsws thiab deformation ntawm qhov chaw molded.
2.6 kev soj ntsuam ntawm cov tsis xws ntawm cov teeb meem
Cov plua plav zom zaws yog qhov tshwm sim, thiab deformation yog qhov tseem ceeb, uas tshwm sim los ntawm kev xaiv cov khoom tsis raug. Hauv lwm lo lus, cov shrinkage ntawm cov ntaub ntawv yog lub ntsiab sib txawv ntawm deformation thiab shrinkage cim.
2.7 kev txhim kho cov txheej txheem ntawm cov teeb meem ntu
Ua ntej txiav txim siab cov khoom ntawm ntu yas kom tswj tau qhov deformation thiab shrinkage ntawm cov yas seem; Tom qab ntawd npaj cov txheej txheem thev naus laus zis kom dhau los kho cov nyiaj cim thiab nyiaj dhau ntawm cov cim ntawm cov yas; Thaum kawg, qhov teeb meem ntawm qhov tsis yog-cylindricity ntawm cylindrical qhov ntawm cov yas qhov chaw yog daws tau los ntawm kev siv txoj kev txwv thib ob shrinkage ntawm cov yas hauv cov txheej txheem molding.
2.7.1 txiav txim siab cov khoom ntawm ntu yas los kho cov deformation thiab shrinkage ntawm cov yas
Ua ntej, cov txheej txheem ntawm lub cev (hluav taws) yog siv rau kev tsom xam, tom qab ntawd cov txheej txheem tshuaj (dichloroethane lossis chloroform) yog siv rau kev tsom xam, thiab tom qab ntawd siv cov txheej txheem spectral tsom xam. Nco ntsoov tias cov khoom siv ntawm cov ntu khoom yog PC. Qhov shrinkage ntawm PC ntshiab yog 0.5 ~ 0.7%, uas tseem loj dhau. Tom qab ntawd 30% iav fiber tam siv tam polycarbonate tau siv rau kev kuaj pwm, thiab cov txheej txheem kev txhaj tshuaj tau hloov kho tas li. Lub ntsej muag ntsws ntawm cov khoom ploj tag nrho, thiab lub ov ov thiab taper ntawm lub qhov tau tswj tsis pub dhau 0.06 hli Txawm li cas los xij, kev zam dhau ntawm ov ov thiab taper tseem loj, uas tseem yuav tsum tau kho. Lub dav hlau ntxau yog li 0.03 hli, tuaj yeem ua kom tau raws kev ua kom haum ntawm pwm ntawm qhov chaw. Vim tias cov iav fiber ntau raug tshem tawm ntawm nplaim qhov moulded, qhov saum npoo ntawm kev hloov pauv-hloov tshwm zoo li ntxhib, yog li ntawd tsuas yog cov iav fiber tau tshem tawm thiab qhov muab tub lim ntxiv. Tom qab ntawd, 25% iav hlaws tau siv los ua cov muab tub lim, thiab nws cov shrinkage yog 0.3% ~ 0.4%, uas tsis tsuas daws tau qhov teeb meem ntawm cov npoo av, tab sis kuj txhim kho kev hnav tsis kam ntawm cov khoom, thiab kev ua tau zoo ntawm cov khoom lag luam tshaj qhov ntawm cov khoom seem txawv teb chaws.
