Zvivakwa uye maitiro emapuranga epurasitiki jekisiyamu ekuumba anokanganiswa nezvakawanda zvinhu. Yakasiyana plassics inoda kuumba iyo fomu yekugadzira yakakodzera kune zvivakwa zvavo kuitira kuti uwane zvakanakisa michina.
Injection inoumbwa mapoinzi ndeyekutevera:
Imwe, shrinkage rate
Zvinhu zvinokanganisa kuumbwa kuderera kweiyo thermoplastic mapurasitiki ndeye inotevera:
1.TyTypes yemapurasitiki
| AIHWA. | PurasitikiZita | ShrinkageRakadya |
| 1 | Pa66 | 1% -2% |
| 2 | Pa6 | 1% -1.5% |
| 3 | PA612 | 0.5% -2% |
| 4 | PBT | 1.5% -2.8% |
| 5 | PC | 0.1% -0.2% |
| 6 | Pom | 2% -3.5% |
| 7 | PP | 1.8% -2.5% |
| 8 | PS | 0.4% -0.7% |
| 9 | Pvc | 0.2% -0.6% |
| 10 | Abs | 0.4% -0.5% |
2.The saizi uye chimiro chekuumbwa kweumbwa. Yakawandisa madziro madziro kukakavara kana kuti isina kutonhora system inogona kukanganisa shrigage. Uye zvakare, kuvapo kana kusavapo kwemidziyo uye huwandu uye huwandu hwemasendimendi anonyanya kukanganisa nzira yekuyerera, density kugoverwa uye kuderera kupokana.
3.Chimiro, saizi uye kugoverwa kwemuromo wekunyama. Izvi zvinhu zvakananga zvinokanganisa kutungamira kwekuyerera kwekuyerera, density kugoverwa, kudzvinyirira kubata uye kuderera maitiro uye kuumba nguva.
4.Mold tembiricha uye kumanikidzwa kwejekisi.
Mol Tembiricha yakakwira, nyungudika yakakura, chiyero chepurasitiki chakakwira chakakwira, kunyanya mapurasitiki nekapfuma yakakwirira. Iyo tembiricha yekugovera uye density kusafanana kwezvikamu zvepurasitiki zvakare kukanganisa zvakananga kuderera uye kutungamirirwa.
Dzvinyiriro yekuchengetwa uye nguva zvakare ine chekuita nekekupokana. Dzvinyiriro yakakwirira, nguva yakareba ichaderera asi kutungamira kwakakura. Naizvozvo, kana tembiricha yekunyungudika, kumanikidzwa, jekiseni kuumba kumhanya uye nguva inotonhorera uye zvimwe zvinhu zvinogonawo kuve zvakakodzera kuchinja kuderera kwezvikamu zvepurasitiki.
Dhizaini yekugadzira maererano nemhando dzakasiyana dzepurasitiki dzinoputira, chimiro chemuviri boti, chimiro, maererano nechiitiko chekutsvaira chikamu chega chega chepurasitiki, tobva aunganidza saizi yekasirese.
Kune yakakwirira-chaiyo-mapurasitiki zvikamu uye zvakaoma kunzwisisa iyo shrust iyo shringege chiyero, zvinowanzokodzera kushandisa nzira dzinotevera kuti dzigadzire kuumbwa:
a) Tora zvishoma shrinkage yezvikamu zvepurasitiki mune yekunze diameter uye yakakura shrinkage kuitira kuti ive nzvimbo yekuchinjika mushure mekuedzwa mushure mekuedzwa kwemold.
b) muyedzo wekuyera kuti uone iyo yekukanda fomu fomu, saizi uye kugadzira mamiriro.
c) Kukura kwekushanduka kwezvikamu zvepurasitiki kuti zvitevedzwe kunotarisirwa mushure mekutsvuka (chiyero chinofanira kunge chiri maawa makumi maviri nemana mushure mekubviswa).
d) shandura iyo mold maererano neiyo chaiyo shrinkage.
e) Iyo yekufa inogona kudzorwa uye iyo inoderera kukosha inogona kushandurwa zvishoma nekuchinja maitiro nenzira kwayo nenzira kwayo kusangana nezvinodiwa zvezvikamu zvepurasitiki.
Chepiri,Liquidity
- Fluidity yeTernmoplastic inowanzoongororwa neyekutevedzana kweNdemo, LELT Index, Archimed Spiral Flow Hurefu, Kureba kweRatio (Kuyerera Hurefu / Plastiki Wall Kukara boti. Kune mapurasitiki ezita rimwe chete, chirevo chinofanira kuongororwa kuti uone kana fluidity yavo yakakodzera jekiseni kuumbwa.
Sekureva kweMold Dhizaini Zvinodiwa, iyo Flidiity yePlastics inowanzo shandiswa inogona kukamurwa kuita zvikamu zvitatu:
a) Fluidity yakanaka yePa, pe, ps, pp, ca ne polymethylretinoene;
b) Yepakati Kuyerera Polystyrene Resin Series (sekuti ABS, AS), PMMA, POM, POMPHE, POMPEYLELL ETER;
c) Yakatadza Fluidity PC, yakaoma PVC, Polyphenyl Ether, Polysulfone, Polyaromatic Sulfone, Fluorine Plastiki.
- Iyo fluidity yemapurasitiki akasiyana zvakare inoshandukazve nekuda kwezvinhu zvakasiyana siyana zvekuumbwa. Zvinokurudzira zvikuru zvinhu zvinotevera:
a) tembiricha. Tembiricha yakakwirira yekuwedzera ichawedzera kuti isimbe, asi mapurasitiki akasiyana zvakare akasiyana, For pe, pom, saka kupisa kwekuwedzera uye kuderera kweshoma pesvedzero pane yavo yekubuda.
b) kumanikidzwa. Injection inonyungudika kudzvanywa inowedzera chinyungudutswa nokusheya, kunyanya inowedzera, kunyanya pe, pom inonzwisa tsitsi, saka nguva yekunyora jekiseni kuumbwa kudzora kuyerera.
c) die die chimiro. Yakadai sekudurura fomu yehurongwa, saizi, chimiro, kutonhora, system yekudzora, kupedza system uye zvimwe zvinhu zvakanetsa zvinokanganisa kuyerera chaiko kwechinyorwa chakaumbwa.
Dhizaini yeMod inofanira kunge yakavakirwa pakushandiswa kwepurasitiki yekuyerera, sarudza mamiriro anonzwisisika.Molding inogona zvakare kudzora tembiricha yekupisa, yekumanikidza uye zvimwe zvekumhanya uye zvimwe zvinhu zvekugadzirisa zvakanyatsogadzirisa kuzadza zvido zvekusangana nezvinodiwa zvekuumbwa.
Kutumira Nguva: 29-10-21