Seo Screw Barrel e hlileng e se Etsang
The screw le barrel sebetsa e le para e tšoanang. Mona ke tatellano ea potoloho e 'ngoe le e 'ngoe:
- Ho fepa- Li-pellets tsa polasetiki li theoha ho tloha hopper ho ea sebakeng sa phepelo.
- Ho qhibiliha- The rotating screw hlahisa mocheso o kuta. E kopantsoe le li-heaters tsa barrel, li-pellets lia qhibiliha le ho hatella.
- Metara- The qhibiliha e fetoha e ts'oanang mocheso le khatello pele e etsoa.
- Ente- The screw e ea pele joalo ka plunger, e sutumelletsa polasetiki e qhibilihisitsoeng ka har'a hlobo.
Mofuta o mong le o mong oa moralo - jiometry, likarolo tsa libaka, kalafo ea bokaholimo - e ama hore na mehato eo e mene e etsahala hantle hakae. Ho se lumellane ho e 'ngoe ea tsona ho bonahala e le bothata ba tlhahiso.
Qeto ea 1: Karolelano ea L/D
Karo-karolelano ea L/D (bolelele ba screw flighted e arotsoe ka bophara ba eona) ke nomoro ea bohlokoa ka ho fetisisa letlapeng la spec. E laola nako ea bolulo, boleng ba ho kopanya, le kabo ea mocheso.Lisebelisoa tse ngata tsa ho etsa ente ka sepheo se akaretsang li sebelisa 20:1.
| Resin | L/D e khothalelitsoeng |
|---|---|
| PP, PE, PS (e tloaelehileng) | 18:1 – 20:1 |
| ABS, PC | 20:1 – 24:1 |
| PVC (ha e mamele mocheso) | 16:1 – 20:1 |
| PET | 20:1 – 22:1 |
| Nylon (PA) | 18:1 – 20:1 |
| Lisebelisoa tse matlafalitsoeng ke GF | 20:1 – 24:1 |
Qeto ea 2: Karolelano ea Compression
Karo-karolelano ea khatello (CR) e lekanya hore na kanane ea screw e sesefala hakae ho tloha sebakeng sa phepelo ho ea sebakeng sa metering. CR e phahameng e hatella ho qhibiliha ka mokhoa o mabifi - e ntle bakeng sa li-resin tsa amorphous tse bonolo butle-butle. Lower CR e bonolo, e leng seo u se hlokang bakeng sa thepa e sa utloeng mocheso kapa fiber.
| Resin | Compression ratio |
|---|---|
| ABS, PC, PMMA (amorphous) | 3.0 - 3.5:1 |
| PP, PE, Nylon (semi-crystalline) | 2.5 - 3.0:1 |
| PVC | 2.0 - 2.5:1 |
| PET | 2.3 - 2.6:1 |
| E matlafalitsoe ke GF (≥15%) | 2.0 - 2.5:1 |
Qeto ea 3: Likarolo tsa Libaka
Sekurufu se tloaelehileng sa ente se arola likarolo tse tharo. Karolo ea sebaka ka seng e bohlokoa joalo ka kakaretso ea L/D.
- Feed Zone (L1):Likanale tse tebileng tse amohelang li-pellets tse tiileng ho tsoa ho hopper. Nako e telele = matla a mangata a ho feta.
- Compression Zone (L2):Botebo ba mocha bo fokotseha butle-butle. Boholo ba ho qhibiliha ho etsahala mona.
- Metara Zone (L3):Likanale tse sa tebang, tse tsitsitseng. E netefatsa mocheso o ts'oanang oa ho qhibiliha le khatello pele e etsoa.
| Resin | Fepa (L1) | Khatello (L2) | Metara (L3) |
|---|---|---|---|
| PP / PE | 50% | 25% | 25% |
| ABS / PC | 40% | 40% | 20% |
| PET | 40% | 40% | 20% |
| Nylon (PA) | 35–45% | 35–40% | 20–25% |
| PVC | 35% | 50% | 15% |
Qeto 4: Screw Barrel Material
38CrMoALA — The Standard Baseline
Li-screw tsa Nanhaiya tsa ho bopa li entsoe ka38CrMoALA tšepe ea motsoako, e phekotsoeng mocheso le ho tima. Sesebediswa sena sa motheo se sebetsana le thermoplastics e tloaelehileng joalo ka PE, PP, PS, le ABS hantle, ka bophelo ba ts'ebeletso ba hoo e ka bang.10,000–20,000 lihoratlas'a maemo a tloaelehileng a ts'ebetso.
Nitriding
Khase nitriding ho 500-560 ° C e etsa lera le nang le nitridedBotenya ba 0.5-0.8mmka boima ba950–1050 HV (~62 HRC). Sena se ntlafatsa khanyetso ea ho roala ka 30-40% ha e bapisoa le tšepe e sa sebetsoeng. Tloaelo bakeng sa lisebelisoa tse ngata tsa ente tse sebelisang lisebelisoa tse sa tlatsoang kapa tse tlatsitsoeng hanyenyane.
Nanhaiya mutant (ka tšohanyetso) sekoahelo sa ho bopa ente - se loketseng lirese tsa kristale tse kang PP, PE, le Nylon.
Bimetallic - Bakeng sa Lisebelisoa tsa Abrasive
Li-barrel tsa Bimetallic li na le lesela le phahameng la alloy le sa sebetseng ka metallurgical le tlamahaneng le moqomo. Mokhoa oa bimetallic oa Nanhaiya o finyella eka hare bore boima ba 62 HRCka hard alloy spray welding ho pota-pota libaka tse phahameng tsa ho roala ka hare ho barrel.
| Kopo | Screw Material | Phekolo ea Moqomo |
|---|---|---|
| PE, PP, PS (e sa tlatsoa) | 38CrMoALA nitrided | Nitrided e tloaelehileng |
| ABS, PC, Nylon (e sa tlatsoa) | 38CrMoALA nitrided | Nitrided e tloaelehileng |
| PA + GF ≤30% | 38CrMoALA, e tingoe + e halefile | Nitrided kapa bimetallic |
| Litaba tsa GF 15–50% | Bimetallic / TC moeli oa sefofane | Bimetallic |
| PVC / li-resin tse senyang | Motsoako o hananang le kutu | Bimetallic (CR grade) |
| Khabone e tletse fiber | Tungsten carbide | TC-sprayed bore |
Qeto ea 5: Screw Diameter le Shot size
Thunya ea hau ea 'nete e lokela ho oela lipakeng35% le 70%ea boholo ba ho thunngoa ha screw. Ka tlase ho 35%, thepa e lula ka har'a moqomo nako e telele haholo mme e baka ho senyeha. Ka holimo ho 70%, screw ha e khone ho hlaphoheloa ka potlako ka hare ho potoloho.
Ka tlase ke litlhophiso tse tloaelehileng tse fumanehang ho tsoa Nanhaiya:
| Chelete ea Ente (g) | Screw Ø × Bolelele (mm) | Moqomo Ø × Bolelele (mm) |
|---|---|---|
| 30–90 | Φ30×900 | Φ85×860 |
| 60–125 | Φ35×910 | Φ85×860 |
| 100–150 | Φ38×935 | Φ95×900 |
| 125–300 | Φ42×1030 | Φ105×1110 |
| 250–400 | Φ45×1210 | Φ115×1165 |
| 300–500 | Φ50×1300 | Φ125×1260 |
| 500–700 | Φ60×1380 | Φ140×1350 |
| 700-1000 | Φ70×1790 | Φ160×1685 |
| 1000-1500 | Φ160×3500 | Φ270×3200 |
| 1300–2500 | Φ170×3415 | Φ317×3380 |
Nanhaiya butle-butle ea ho bopa sekoti - e betere bakeng sa li-resin tsa amorphous joalo ka ABS, PC, le PMMA.
Matšoao a lemosang hore Screw ea hau ea hajoale e fosahetse bakeng sa mosebetsi
- Matheba a matsho kapa matheba a cheleng- Ho senyeha ha thepa ka lebaka la nako e telele ea bolulo kapa sebaka se chesang. Sheba libaka tsa mocheso oa barrel le sebaka sa ho tlosoa ha screw.
- Boima ba ho thunya bo sa tsitsang- Hangata valve e tsofetseng e sa khutleng kapa sebaka sa "screw-to-barrel clearance" se lumellang ho khutla.
- Splay marks ka holimo- Mongobo kapa khase ha e qhibiliha. E ka bonts'a ho se omise pele ho nako kapa "screw geometry" e sa tsoeng moea hantle.
- Ho hlaphoheloa butle / nako e telele ea potoloho- Matla a ho etsa polasetiki ha a lekana. Ho ka 'na ha hlokahala hore bophara ba screw bo eketsehe.
- Liphetoho tse phahameng tsa mebala- Ho kopanya hampe sebakeng sa metering. Ntho e kopanyang ea Maddock kapa lithibelo e kentsoeng ho screw hangata e rarolla sena.
Seo U Lokelang ho se Bolella Moetsi oa Hao ha U Kopa Khoutu
- Letšoao la mochini le mohlala- kapa bore bophara le litekanyo tsa flange bakeng sa mechini e sa tloaelehang
- Li-resin tsa mantlha- kenyelletsa mofuta oa ho tlatsa le liperesente haeba ho hlokahala
- Sebaka sa boholo ba thunya- bonyane le boholo ka ligrama
- Nako ea potoloho e reriloeng
- Mathata a hajoale ao o lekang ho a rarolla- haeba e teng
Fumana Keletso ea Tekheniki ho tsoa ho Nanhaiya
Re araba ka hare ho lihora tse 12. Sehlopha sa rona sa boenjiniere se ka hlakisa jiometry e nepahetseng ea screw, boemo ba thepa, le boholo ba mochini oa hau le resin - pele o itlama ho qotsa.
