Cov Txheej Txheem Casting rau Kev Tsim Yas thiab Cov Hom Yas Tsim Nyog
Kev casting yog ib txoj kev tsim khoom siv dav dav los tsim cov khoom yas, tshwj xeeb tshaj yog thaum xav tau cov nplaim du, cov duab ntxaws ntxaws, lossis cov khoom me me mus rau nruab nrab. Tsis zoo li kev txhaj tshuaj molding, uas xav tau kev siv tshuab siab thiab cov tshuab tshwj xeeb, kev casting yooj yim dua vim tias cov khoom yas, hauv cov kua lossis cov tshuaj, raug nchuav rau hauv pwm thiab tom qab ntawd cia kom tawv los ntawm kev txias, tshuaj lom neeg, lossis cov kuab tshuaj evaporation. Tsab xov xwm no tham txog cov ntsiab cai yooj yim ntawm kev casting rau kev tsim yas, cov kauj ruam txheej txheem, nws cov txiaj ntsig thiab qhov tsis zoo, thiab cov hom yas tsim nyog tshaj plaws.
Cov Txheej Txheem Casting Yas yog dab tsi?
Feem ntau, kev casting yog cov txheej txheem ntawm kev tsim ib yam khoom los ntawm kev nchuav cov khoom siv kua rau hauv pwm, uas tom qab ntawd tawv thiab ua raws li cov duab ntawm lub pwm qhov. Hauv cov ntsiab lus ntawm cov yas, "kua" txhais tau tias ntau yam: cov resin ob-component uas teb los tsim cov polymer khov kho, yas yaj, lossis yas yaj hauv cov kuab tshuaj (solvent casting). Tom qab hardening, cov khoom raug tshem tawm ntawm pwm thiab feem ntau dhau los ua tiav xws li txiav, xuab zeb, lossis txheej.
Cov txheej txheem casting feem ntau siv los tsim cov qauv prototypes, cov khoom dai kom zoo nkauj, cov iav pob tshab lossis cov npog, cov txheej txheem, thiab txawm tias cov khoom lag luam nrog cov qauv tshwj xeeb uas nyuaj rau ua tiav los ntawm lwm cov txheej txheem. Vim tias nws vam khom ntau rau cov khoom siv ntws thiab tsim pwm, kev xaiv yas yog qhov tseem ceeb rau kev ua tiav cov txiaj ntsig muaj zog, ruaj khov, thiab tsis muaj qhov tsis zoo.
Hom Kev Siv Yas Casting
1. Kev Casting Resin (Kev Casting Raws Li Tshuaj Lom)
Qhov no yog txoj kev nrov tshaj plaws rau kev ua yas niaj hnub no. Cov roj hmab (feem ntau yog ob yam khoom: roj hmab thiab cov khoom ua kom tawv) raug sib xyaw thiab tom qab ntawd nchuav rau hauv pwm. Tom qab ntawd muaj kev sib xyaw ua ke, ua rau nws tawv.
Piv txwv ntawm cov ntaub ntawv: polyurethane (PU) resin, epoxy resin, polyester resin.
Haum rau: cov khoom ua kom ntxaws, cov khoom siv ua si / khoom siv tes ua, cov qauv lag luam, cov khoom siv hluav taws xob (potting).
2. Kev Siv Cov Tshuaj Tua Kab (Kev Siv Cov Tshuaj Tua Kab)
Cov polymer no raug yaj rau hauv cov tshuaj uas tsim nyog kom txog thaum nws ua cov tshuaj tuab, tom qab ntawd nchuav rau ntawm ib qho chaw tiaj tus lossis pwm. Cov tshuaj no maj mam ua pa, tawm hauv ib daim yas.
Piv txwv ntawm cov ntaub ntawv: PVC, cellulose acetate, PVA, qee hom acrylic hauv qee lub tshuab.
Haum rau: cov yeeb yaj kiab nyias nyias, cov ntawv yooj ywm, cov txheej txheej, cov ntaub so ntswg.
3. Kev Txhaj Tshuaj Yas (Kev Txhaj Tshuaj Yas los ntawm Kev Txhaj Tshuaj Yas)
Cov yas raug cua sov kom txog thaum nws yaj thiab ntws tau, tom qab ntawd nchuav rau hauv pwm ua ntej rov khov thaum nws txias. Txoj kev no nyuaj dua vim tias ntau cov thermoplastics muaj viscosity siab thaum yaj, xav tau kev tswj qhov kub thiab qee zaum tswj qhov siab.
Piv txwv ntawm cov ntaub ntawv: qee hom nylon thiab cov thermoplastics tshwj xeeb (nyob ntawm daim ntawv thov thiab cov khoom siv).
Haum rau: qee cov ntawv thov uas tso cai rau cov pwm kub ruaj khov thiab tiv taus cua sov.
Cov Theem Dav Dav ntawm Cov Txheej Txheem Casting
Txawm hais tias cov hom sib txawv, cov txheej txheem casting feem ntau ua raws li cov kauj ruam no:
1. Tsim pwm thiab npaj
Cov pwm tuaj yeem ua los ntawm silicone (rau cov ntsiab lus siab thiab yooj yim tshem tawm), hlau, iav, lossis yas tawv. Silicone feem ntau raug xaiv rau kev casting resin vim nws yooj ywm, tiv taus ntau cov resins, thiab yooj yim rau demolding.
2. Kev siv tshuaj tua kab mob
Cov tshuaj tso tawm tiv thaiv cov khoom kom tsis txhob lo rau pwm. Qhov no tseem ceeb heev rau cov pwm tawv lossis cov khoom siv resin uas feem ntau "tom" qhov chaw pwm.
3. Kev ntsuas thiab sib tov cov ntaub ntawv
Nrog cov resins ob-component, qhov sib tov sib xyaw yuav tsum yog qhov tseeb. Qhov yuam kev me me tuaj yeem ua rau cov txiaj ntsig tsis khov, nplaum, lossis kho tsis tiav.
4. Degassing (txo cov npuas)
Cov npuas cua yog ib qho ntawm cov teeb meem feem ntau. Kev tshem cov pa roj tawm tuaj yeem ua tiav los ntawm kev siv lub tshuab nqus tsev, maj mam nchuav, lossis siv lub lauj kaub siab tom qab nchuav kom "nias" cov npuas ua tej daim me me.
5. Kev tswj cov dej ntws thiab ntws
Cov txheej txheem nchuav cuam tshuam rau qhov zoo: nchuav los ntawm ib qho chaw, tswj kom tus dej nyias nyias, thiab zam kev co yuav pab txo cov npuas dej.
6. Kho/qhuav/txias
Kev kho cov roj hmab yuav siv sijhawm ob peb feeb mus rau ob peb teev. Kev ua cov tshuaj yaj yuav tsum tswj kev ua kom qhuav kom tiv thaiv kev tawg. Kev ua cov tshuaj yaj yuav tsum tau txias kom khov.
7. Kev rhuav tshem thiab kev ua tiav
Cov khoom raug tshem tawm ntawm pwm, tom qab ntawd txiav, du, txhuam (kom pom tseeb), lossis pleev xim / UV txheej.
Cov Zoo thiab Qhov Tsis Zoo ntawm Cov Txheej Txheem Casting
Tshaj:
- Haum rau kev tsim khoom me me thiab cov qauv tsim vim tias cov nqi cuab yeej tsawg.
- Muaj peev xwm tsim cov ntsiab lus zoo, suav nrog cov qauv ntawm qhov chaw.
- Ua tau cov khoom tuab lossis cov duab nyuaj yam tsis tas siv tshuab kim (tshwj xeeb tshaj yog cov khoom siv ua los ntawm cov hlau).
- Muaj ntau yam khoom siv xaiv: pob tshab, yoog tau, tawv, tiv taus kev cuam tshuam, tiv taus cua sov (nyob ntawm cov resin).
Tsis Muaj:
- Lub sijhawm ua haujlwm ntev dua li kev txhaj tshuaj molding (tshwj xeeb tshaj yog kho).
- Kev pheej hmoo ntawm cov npuas dej, ntsws, lossis qhov tsis zoo ntawm qhov chaw yog tias cov txheej txheem tsis raug tswj.
- Qee cov resins tso tawm cua sov thaum lub sijhawm kho (exothermic) yog li muaj kev pheej hmoo ntawm kev tawg hauv cov ntu tuab.
– Kev sib xws ntawm cov pawg khoom sib txawv tuaj yeem nyuaj rau tswj dua li hauv cov txheej txheem kev lag luam siab.
Hom Yas Uas Haum Rau Kev Casting
Cov hauv qab no yog cov hom yas/resin feem ntau uas tsim nyog rau cov txheej txheem casting, nrog rau lawv cov yam ntxwv.
1. Polyurethane (PU) Casting Resin
PU nrov heev rau kev casting vim nws yooj yim rau kev ua thiab muaj ntau yam khoom: los ntawm kev ywj pheej mus rau cov elastomers nruj xws li ABS.
Tshaj:
- Kev kho sai heev.
- Cov khoom siv kho tshuab tuaj yeem hloov kho (nyuaj-yoog).
- Haum rau cov khoom seem thiab prototyping.
Daim ntawv thov: lub log me me, lub thawv tiv thaiv, vaj tse, cov khoom lag luam sib zog.
2. Epoxy Resin
Epoxy paub txog nws qhov kev nplaum zoo, lub zog kho tshuab thiab kev ruaj khov ntawm qhov ntev.
Tshaj:
- Muaj zog thiab tiv taus tshuaj lom neeg.
- Kev txo qis qis.
- Haum rau cov khoom sib xyaw ua ke (iav / carbon fiber).
Tsis Muaj:
- Yuav kim dua thiab siv sijhawm ntev dua los kho.
– Qee hom feem ntau yuav daj thaum raug UV (tshwj tsis yog cov epoxies tshwj xeeb uas ruaj khov UV).
Daim ntawv thov: hluav taws xob potting, cov khoom me me, cov rooj epoxy, coatings.
3. Cov tshuaj polyester
Cov tshuaj polyester feem ntau siv rau hauv kev lag luam fiberglass vim nws pheej yig dua thiab cov txheej txheem yooj yim heev.
Tshaj:
- Cov nqi qis dua.
- Haum rau cov fiberglass composites.
Tsis Muaj:
- Muaj ntxhiab tsw qab (styrene) thiab xav tau cua nkag zoo.
- Kev ntsws tuaj yeem siab dua li epoxy.
Daim ntawv thov: fiberglass panels, lub cev khoom siv, GRP (iav reinforced yas) cov khoom.
4. Acrylic (PMMA) Casting (Cast Acrylic)
PMMA hu ua "acrylic," uas yog pob tshab zoo li iav. Hauv daim ntawv acrylic cam khwb cia, cov khoom siv tuaj yeem tsim los ntawm cov txheej txheem casting, ua rau muaj kev pom tseeb zoo heev.
Tshaj:
- Kev pom tseeb siab thiab qhov chaw zoo.
- Kev ruaj khov ntawm huab cua zoo dua li ntau lwm cov yas ntshiab.
Daim ntawv thov: lenses, zaub, pob tshab panels, premium signage.
5. PVC (Kev Siv Cov Tshuaj Rau Zaj Duab Xis/Txheej)
PVC tuaj yeem ua tiav los ntawm kev siv cov kuab tshuaj los tsim cov ntawv lossis cov khaubncaws sab nraud povtseg tshwj xeeb.
Tshaj:
- Yooj yim hloov pauv (nyob ntawm tus neeg ua kom yas).
- Haum rau cov yeeb yaj kiab thiab cov txheej txheem.
Lus Cim: kev xaiv cov kuab tshuaj thiab kev tswj kev evaporation yog qhov tseem ceeb rau qhov zoo.
6. Silicone (Tsis yog Yas Classic, tab sis Feem ntau Cast)
Txawm hais tias silicone raug cais ua elastomer, nws feem ntau yog molded siv txoj kev casting (ob-component). Silicone kuj tseem siv tau ua cov khoom siv molding rau lwm cov resins.
Daim Ntawv Thov: gaskets, pwm hloov pauv tau, qee yam khoom siv kho mob, cov ntsaws ruaj ruaj.
Cov Lus Qhia rau Kev Xaiv Yas rau Kev Tsim Khoom
1. Txheeb xyuas cov khoom siv kho tshuab uas yuav tsum tau ua: seb nws puas yuav tsum tawv, yoog tau, lossis tiv taus kev cuam tshuam.
2. Ua tib zoo saib cov khoom tuab: cov khoom tuab dua yuav muaj feem yuav kub hnyiab (qee cov resins), tawg, lossis ntsws.
3. Xav txog qhov tsos: rau cov khoom ntshiab, xaiv cov resin uas muaj qhov meej thiab muaj peev xwm ua kom zoo nkauj (piv txwv li qee cov epoxies lossis cast acrylic).
4. Tshawb xyuas qhov tsis kam ntawm ib puag ncig: UV, cua sov, lossis tshuaj lom neeg tuaj yeem xav tau cov resins tshwj xeeb.
5. Hloov kho rau txoj kev molding: silicone yog qhov tsim nyog rau ntau cov resins, thaum cov pwm tawv yuav xav tau tus neeg sawv cev tso tawm kom raug.
Xaus
Kev casting yog ib txoj kev zoo rau kev tsim yas thaum xav tau kev ywj pheej ntawm kev tsim qauv, kev nthuav dav me me, thiab cov nqi pib qis dua piv rau cov txheej txheem xws li kev txhaj tshuaj molding. Los ntawm kev nkag siab txog ntau hom kev casting - resin casting, solvent casting, thiab melt casting - thiab xaiv cov khoom siv zoo, xws li PU, epoxy, polyester, acrylic, lossis PVC, cov khoom tsim tau tuaj yeem ua tau raws li ob qho tib si kev ua haujlwm thiab kev zoo nkauj. Tus yuam sij rau kev ua tiav casting yog nyob rau hauv kev tswj kev sib tov, nchuav, txo cov npuas, thiab kho kom zoo.
Yog tias koj xav tau, kuv tuaj yeem hloov kho tsab xov xwm no kom yooj yim dua (piv txwv li, ntxiv cov txheej txheem txheej txheem, piv txwv li cov piv txwv sib xyaw ua ke, lossis cov ntaub ntawv kawm ntawm cov khoom tshwj xeeb), lossis tsim ib qho version yooj yim dua rau cov haujlwm hauv tsev kawm ntawv.
