Thaumtxhaj tshuaj molding, yog tias lub rooj vag me me dhau thiab qhov kev txhaj tshuaj nrawm dhau, cov yaj ntws hloov pauv loj heev thiab huab cua raug kaw hauv cov yaj. Qhov no ua rau pom cov duab ntxoov ntxoo ntawm lub qhov rooj, khoov, thiab cov kauj ruam ntawm cov yas. Cov duab ntxoov ntxoo no yog hu ua huab cua streaks, raws li pom hauv daim duab 3-63 thiab 3-64. ABS, PC, thiab PPO yas yog tshwj xeeb tshaj yog ua rau huab cua streaks ntawm lub rooj vag.
Daim duab 3-63 Airmarks ntawm ib feem yas (I)
Daim duab 3-64 Cua npuas ntawm ib feem (II)
Qhov ua rau thiab kev daws teeb meem rau huab cua streaks muaj nyob rau hauv cov lus hauv qab no.
| # | Keeb kwm Analysis | Kev daws teeb meem |
|---|---|---|
| 1 | Cov khoom kub siab dhau los yog pwm kub tsawg dhau | Txo cov khoom kub (kom tiv thaiv degradation) los yog nce pwm kub |
| 2 | Lub rooj vag me me dhau los yog qhov chaw tsis raug | Ua kom lub rooj vag loj lossis hloov qhov rooj qhov rooj |
| 3 | Cov pa npuas lossis cov cim dab dej tshwm sim los ntawm kev txhaj tshuaj nrawm heev | Siv ntau-theem txhaj tshuaj, maj mam txo qhov txhaj tshuaj ntawm cov chaw sib thooj |
| 4 | Khiav ntev dhau los yog nyias dhau (cov khoom txias heev) | Ua kom luv los yog loj dua tus khiav txoj kab uas hla |
| 5 | Tsis muaj kev hloov pauv / hloov pauv ntawm cov khoom kauj ruam lossis cov ces kaum | Ntxiv cov fillet / puag ncig hloov ntawm cov kauj ruam thiab cov ces kaum |
| 6 | Cov cua tsis zoo (cua pa) | Txhim kho pwm qhov cua |
| 7 | Txias slug zoo me me los yog tsis txaus | Ua kom loj lossis ntxiv cov qhov dej txias txias |
| 8 | Tsis txaus ziab ntawm raw khoom los yog overheating decomposition | Ua kom qhuav cov khoom raw thiab tiv thaiv overheating decomposition |
| 9 | High viscosity thiab tsis zoo flowability ntawm cov yas | Hloov mus rau cov yas nrog zoo flowability |
Cov kab dub (dub kab txaij) thiab lawv cov kev daws teeb meem
Cov streaks dub yog cov kab dub uas tshwm rau saum npoo ntawm cov yas, los yog cov kab txaij dub, raws li pom hauv daim duab hauv qab no.
Qhov laj thawj tseem ceeb ntawm cov streaks dub yog cov thermal decomposition ntawm cov khoom molding, feem ntau pom nyob rau hauv cov yas uas tsis zoo thermal stability (xws li PVC thiab POM). Cov kev ntsuas zoo los tiv thaiv cov streaks dub muaj xws li tiv thaiv cov kub yaj ntau dhau hauv lub thoob thiab ua kom qhov kev txhaj tshuaj nrawm. Yog hais tias lub thoob los yog ntsia hlau muaj khawb los yog qhov khoob, cov khoom uas ua rau qhov ntawd yuav dhau los, ua rau thermal decomposition. Tsis tas li ntawd, cov kab nrib pleb hauv lub nplhaib tuaj yeem ua rau thermal decomposition vim yaj tuav; Yog li ntawd, yuav tsum tau saib xyuas tshwj xeeb kom tsis txhob muaj cov kab mob dub los ntawm kev tsim hauv siab -viscosity lossis yooj yim decomposed plastics.
Qhov ua rau thiab kev daws teeb meem rau cov kab dub dub tau qhia hauv cov lus hauv qab no.
| # | Keeb kwm Analysis | Kev daws teeb meem |
|---|---|---|
| 1 | Khoom kub kub heev | Txo cov khoom kub / chim kub |
| 2 | Screw tig ceev los yog rov qab siab dhau lawm | Txo cov ntsia hlau tig ceev los yog rov qab siab |
| 3 | Screws thiab chim clearance loj heev, ua rau shear tshav kub | Kho lossis hloov cov ntsia hlau / chim |
| 4 | Nozzle qhov me me dhau los yog kub dhau heev | Hloov lub nozzle nrog lub qhov loj dua lossis qis dua lub nozzle kub |
| 5 | Colorant tsis ruaj khov los yog tsis zoo cua sov | Hloov mus rau cov cua sov- cov xim resistant lossis ntxiv cov khoom siv hluav taws xob |
| 6 | Masterbatch muaj impurities lossis cov ntaub ntawv tsis sib xws | Ntxuav lub taub hau thiab hopper kom huv si |
| 7 | Rov qab txias: cov khoom siv raw hauv lub hopper yog rhuab thiab degrades | Tshawb xyuas hopper txias; nres rov qab txias yog tias tsis muaj yellowing |
| 8 | Siv cov khoom siv rov ua dua tshiab (muaj cov impurities) lossis xim (fading) | Tshawb xyuas lossis hloov cov khoom siv rov qab / qhov ncauj |
| 9 | Nozzle qhov loj dhau los yog muaj cov khoom txawv teb chaws | Hloov mus rau lub nozzle me me los yog ntxuav tawm cov khoom txawv teb chaws hauv lub nozzle |
| 10 | Dwell lub sij hawm ntev dhau (khoom nyob rau hauv chim ntev dhau) | Txo lub sij hawm nyob rau hauv los yog luv tag nrho molding voj voog |