Iipropathi kunye neeparamitha zenkqubo yenaliti yeplastiki zichaphazeleka ziinkalo ezininzi. I-plastics eyahlukeneyo kufuneka iqulunqe iiparamitha zokwenza izinto ezifanelekileyo kwiipropathi zabo ukuze zifumane ezona propati zibalaseleyo.
Amanqaku okuhlwaya amantshontsho alandelayo:
Ireyithi ye-shrinkage
Izinto ezichaphazela ukubethwa kweplastiki ye-thermoplastic zezi zilandelayo:
I-1.types zeplastiki
| HAYI. | Iplastikiigama | Si-hrinkageRutye |
| 1 | I-Pa66 | I-1% -2% |
| 2 | I-PA6 | I-1% -1.5% |
| 3 | I-PA612 | I-0.5% -2% |
| 4 | I-PBT | I-1.5% -2.8% |
| 5 | PC | I-0.1% -0.2% |
| 6 | I-POM | I-2% -3.5% |
| 7 | PP | I-1.8% -2.5% |
| 8 | PS | I-0.4% -0.7% |
| 9 | I-pvc | I-0.2% -0.6% |
| 10 | I-abs | I-0.4% -0.5% |
2.Usayizi kunye nolwakhiwo lwe-mold. Ubunzima obugqithisileyo bukhulu okanye inkqubo yokupholisa ihlwempu inokuchaphazela i-shrinkige. Ukongeza, ubukho okanye ukungabikho kokufakwa kunye nokubekwa kunye nobume kunye nenani lokufakwa ngokuthe ngqo kuchaphazela ngqo indlela yokuhamba, ukusasazeka kokusasazeka kunye nokuchasa i-shrintage.
3.Uhlobo, ubungakanani kunye nokusasazwa komlomo wezinto. Ezi zinto zichaphazela ngqo indlela yokuhamba kwezinto, ukuhanjiswa koxinano, uxinzelelo lwe-shrinkab kunye nefutha kunye nokwenza ixesha.
Iqondo lobushushu le-4mold kunye noxinzelelo lwenaliti.
Iqondo lobushushu liphezulu, inyibilika inyibilike iphezulu, iplastiki yeplastiki yeplastiki iphakamileyo, ingakumbi iplastiki enamantshontsho aphezulu. Ukuhanjiswa kobushushu kunye nokuxinana kwamaqondo obuxineneyo kwezahlulo zeplastiki kuyachaphazela ngokuthe ngqo i-shrinkage kunye nendlela.
Ukugcinwa kwengcinezelo kunye neminyaka kwakhona nayo inefuthe kwintshukumo. Uxinzelelo oluphezulu, ixesha elide liya kuncipha kodwa ulwalathiso lukhulu. Ke ngoko, xa ubushushu obubumbayo, uxinzelelo, isantya sokubumba kunye nexesha lokupholisa kunye nezinye izinto zinokufaneleka ukutshintsha i-shrinkad yenxalenye yeplastiki.
Uyilo olubumba ngokwemigangatho yeentlobo zeplastiki, ubukhulu beplastikhi, ubume befom yefom ye-Inlet kunye nokusasazwa, ngokwemigangatho yokufumanisa ubungakanani beplastiki, emva koko babale ubukhulu be-captity, emva koko ubale ubukhulu be-cavity.
Ngeenxalenye zeplasitiki eziphezulu zeplastiki kwaye kunzima ukuyiqonda ireyithi ye-shrinkage, kufanelekile ukusebenzisa le ndlela ilandelayo ukuyila i-mold:
a) Thatha i-shrinkid encinci yenxalenye yeplastiki kwi-ometer yangaphandle kunye ne-shrinkage enkulu ukuze ube negumbi lokutshintsha emva kovavanyo lokubumba.
b) Uvavanyo lokuBula ukumisela ifom yokuphosa, ubungakanani kunye nemeko.
c) Ubungakanani bezinto zeplastiki ukuba ziphuculwe emva kokuba ziphuculwe emva kokuphuculwa (umlinganiso kufuneka zibe ziiyure ezingama-24 emva kokuthululwa).
d) Guqula ukubumba ngokwangoku.
e) Ukufa kunokuthatha ukuphinda uqhubeke kwaye ixabiso le-shrinkage linokuguqulwa kancinci ngokutshintsha imeko yenkqubo ngokufanelekileyo ukufezekisa iimfuno zeplastiki.
Isibini,Ubugqwetha
- Ulwelo lwe-thermoplastics luhlala luhlaluthwe ngothotho lwesalathiso esifana nemolekyuli, i-melt Index, i-vider yeSpils, i-vider ye-Spirals kunye nePride yokuHamba / ukuHamba kweplastiki / ubude beplastiki Kwiiplasitiki zegama elinye, imigaqo-nkqubo kufuneka ihlolwe ukuze iqwalasele ukuba ngaba ngaba ulwelo lwabo lulungele ukubumba.
Ngokweemfuno zoyilo loyilo, ulwelo lweplastiki eziqhelekileyo zinokusetyenziswa ngokulinganayo zangamacandelo amathathu:
a) Ulwelo oluhle lwe-PA, PE, PS, iphe, i-ca kunye nepolymeththyretinoeee.
b) Ukuhamba okuphakathi kwe-Polystyrene ye-Polystyrene (njenge-ABS, njenge), i-PMMA, iPOM, iPolyphenyl Ether;
c) I-PCIR ye-FOLMIT PC, i-PVC enzima, iPolyphenyl Ether, Polysulfone, i-Polyamatic Sulfone, iplastiki ye-fluorine.
- Ulwelo lweeplastiki ezahlukeneyo lutshintsha ngenxa yezinto ezahlukeneyo zokwakha. Izinto eziphambili ezenziweyo zezi zilandelayo:
a) iqondo lobushushu. High material temperature will increase the liquidity, but different plastics are also different, PS (especially impact resistance and higher MFR value), PP, PA, PMMA, ABS, PC, CA plastic liquidity with temperature change. I-PE, i-POM, emva koko ukunyuka kobushushu kuyanda kwaye kuncitshiswe kunefuthe elincinci kubuninzi bazo.
b) uxinzelelo. Inaliti yoxinzelelo enyuka inyibilike inyibilikiswa ngesenzo seShear, i-gesity ikwanda, ngakumbi i-PE, i-POM inovelwano ngakumbi, ke ixesha le-injeng lalitha ukulawula ukuhamba.
c) Ubume obufa. Njengokutsala kwenkqubo yokuthulula, ubungakanani, ubume, inkqubo yokupholisa, inkqubo yokuphelisa, inkqubo yokuphelisa kunye nezinye izinto zichaphazela ngqo ukuhamba kwezinto ze-movity.
Uyilo olungasesiyo kufuneka lusekwe ekusebenziseni ukuhamba kweplastiki, khetha isakhiwo esifanelekileyo. Iqondo lobuncwane elinokulusa kunye nengxwaba yenaliti, isantya senaliti kunye nezinye izinto zokuhlengahlengisa iimfuno zokuhlangabezana nezidingo zokuhlanganisa.
Iposi: 29-10-21