He aha ka hana a ka Screw Barrel
Hana ʻia ka wili a me ka pahu ma ke ʻano he hui like. Eia ke kaʻina o kēlā me kēia pōʻai:
- Hanai— Hoʻoheheʻe ʻia nā pellet plastik mai ka hopper i ka ʻāpana hānai.
- Heheʻe— Hoʻopuka ka wili wili i ka wela wela. Hoʻohui ʻia me nā mea hoʻomehana barela, hoʻoheheʻe ʻia nā pellets a hoʻopaʻa.
- ana ana— Ua like ka hoohehee i ka wela a me ke kaomi ma mua o ka hookomo ana.
- Hoʻopio— Ke neʻe nei ka wili i mua e like me ka plunger, e hoʻolei ana i ka plastic i hoʻoheheʻe ʻia i loko o ka poʻi.
ʻO kēlā me kēia hoʻololi hoʻolālā - geometry, ʻāpana ʻāpana, ka mālama ʻana i ka ʻili - pili i ka maikaʻi o kēlā mau ʻanuʻu ʻehā. Hōʻike ka mismatch i kekahi o lākou ma ke ʻano he pilikia hana.
Hoʻoholo 1: L/D Ratio
ʻO ka lākiō L/D (ka lōʻihi i hoʻokaʻawale ʻia e ke anawaena) ʻo ia ka helu koʻikoʻi ma ka pepa kikoʻī. Hoʻoponopono ia i ka manawa noho, ka hui ʻana i ka maikaʻi, a me ka hāʻawi ʻana i ka wela.Hoʻohana ka hapa nui o nā noi hoʻoheheʻe ʻana i ka 20:1.
| Resin | Manaʻo ʻia ʻo L/D |
|---|---|
| PP, PE, PS (maʻamau) | 18:1 – 20:1 |
| ABS, PC | 20:1 – 24:1 |
| PVC (ʻike wela) | 16:1 – 20:1 |
| PET | 20:1 – 22:1 |
| Nylon (PA) | 18:1 – 20:1 |
| Nā mea i hoʻoikaika ʻia e GF | 20:1 – 24:1 |
Ka Hoʻoholo 2: Ka hoʻoemi ʻana
ʻIke ʻia ka lakio hoʻoemi (CR) i ka nui o ka haʻikiʻi ʻana o ke kahawai wili mai ka ʻāpana hānai a i ka ʻāpana ana. ʻOi aku ka ikaika o ka CR kiʻekiʻe i ka heheʻe - maikaʻi no nā resins amorphous e palupalu mālie. ʻOi aku ka maʻalahi o ka CR haʻahaʻa, ʻo ia ka mea āu e pono ai no nā mea wela a i ʻole nā mea i hoʻopiha ʻia i ka fiber.
| Resin | Pākuʻi hoʻoemi |
|---|---|
| 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 |
| GF-hoʻoikaika ʻia (≥15%) | 2.0 – 2.5:1 |
Ka Hoʻoholo 3: Nā ʻāpana ʻāpana
Hoʻokaʻawale ʻia kahi wili injection maʻamau i ʻekolu mau ʻāpana. ʻO ka māhele o kēlā me kēia wahi e like me ka nui o ka L/D.
- Wahi Hanai (L1):Nā kahawai hohonu e ʻae i nā pellet paʻa mai ka hopper. ʻoi aku ka lōʻihi = ʻoi aku ka nui o ka hiki ke komo.
- Māhele Hoʻopiʻi (L2):E emi ana ka hohonu o ke kahawai. Hana ʻia ka hapa nui o ka heheʻe ma ʻaneʻi.
- Wahi ana ana (L3):ʻO nā kahawai pāpaʻu, kūlike. E hōʻoia i ka wela hoʻoheheʻe like ʻole a me ke kaomi ma mua o ka hoʻoiho ʻana.
| Resin | Hanai (L1) | Hoʻopiʻi (L2) | ana ana (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% |
Ka Manaʻo 4: ʻO nā mea hao hao
38CrMoALA — Ka Papa Kuhikuhi
Hana ʻia nā wili wili o Nanhaiya mai38CrMoALA hao hao, hana wela a kinai. Mālama kēia mea kumu i nā thermoplastics maʻamau e like me PE, PP, PS, a me ABS maikaʻi, me ke ola lawelawe ma kahi o10,000–20,000 holama lalo o nā kūlana hana maʻamau.
Nitriding
ʻO ke kinoea nitriding ma 500-560°C he papa nitrided0.5–0.8mm mānoanoame ka paakiki o950–1050 HV (~62 HRC). Hoʻomaikaʻi kēia i ka pale ʻana i ka ʻaʻahu e 30-40% i hoʻohālikelike ʻia me ke kila i hoʻoponopono ʻole ʻia. ʻO ke kūlana maʻamau no ka hapa nui o nā noi hoʻoheheʻe injection e holo ana me ka hoʻopiha ʻole ʻia a i ʻole nā mea i hoʻopiha piha ʻia.
Nanhaiya mutant (abrupt) injection molding screw — kūpono no nā resins crystalline e like me PP, PE, a me Nylon.
Bimetallic — No na mea abrasive
Loaʻa i nā barela Bimetallic kahi lining paʻa paʻa kiʻekiʻe i hoʻopaʻa ʻia i ka pahu pahu. Loaʻa i ka hana bimetallic a Nanhaiya i kahika paakiki o loko o 62 HRCma o ka hoʻoheheʻe ʻia ʻana o ka pāpaʻi paʻakikī a puni nā wahi lole kiʻekiʻe o ka pahu i loko.
| Palapala noi | Mea Uila | Lapaau Barela |
|---|---|---|
| PE, PP, PS (hoʻopiha ʻole ʻia) | 38CrMoALA nitrided | Nitrided maʻamau |
| ABS, PC, Nylon (hoʻopiha ʻole ʻia) | 38CrMoALA nitrided | Nitrided maʻamau |
| PA + GF ≤30% | 38CrMoALA, kinai + wela | Nitrided a bimetallic paha |
| GF maʻiʻo 15–50% | Nā kihi lele Bimetallic / TC | Bimetallic |
| ʻO nā resins PVC / corrosive | Pākuʻi pale ʻino | Bimetallic (papa CR) |
| Hoʻopiha ʻia ka fiber carbon | ʻO ke kalapona ʻo Tungsten | ʻO ka lua i hoʻopā ʻia e TC |
Ka Manaʻo 5: Ka Anawaena Uila a me ka Nui Pu
Pono kāu pana maoli e hāʻule i waena35% a me 70%o ka nui o ka mana pana o ka screw. Ma lalo o 35%, noho lōʻihi ka mea i loko o ka pahu a hiki ke hoʻohaʻahaʻa ʻia. Ma luna o 70%, ʻaʻole hiki ke hoʻōla wikiwiki i ka pōʻai.
Aia ma lalo iho nā hoʻonohonoho maʻamau i loaʻa mai Nanhaiya:
| Ka nui o ka hoʻokomo ʻana (g) | Uku Ø × lōʻihi (mm) | Barela Ø × lōʻihi (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 hoʻoheheʻe hoʻoheheʻe ʻia - ʻoi aku ka maikaʻi no nā resins amorphous e like me ABS, PC, a me PMMA.
ʻO nā hōʻailona hoʻomaʻamaʻa he hewa kāu ʻūlū o kēia manawa no ka hana
- ʻeleʻele a i ʻole nā kaha kuni— Hoʻohaʻahaʻa ʻia nā mea mai ka manawa noho nui a i ʻole kahi wela. E nānā i nā ʻāpana wela o ka pahu a me ka wehe ʻana i ka wili.
- Paona pana like ole— ʻO ka pahu hoʻihoʻi ʻole pinepine a i ʻole ka hoʻomaʻemaʻe nui ʻana o ka screw-to-barrel e hiki ai ke kahe hope.
- Splay marks ma ka ʻili— Ka wai a i ʻole ke kinoea i loko o ka hehee. Hōʻike paha i ka maloʻo ʻole ʻana a i ʻole kahi geometry i hoʻokuʻu ʻole ʻia.
- Hoʻihoʻi lohi / manawa pōkole lōʻihi— ʻAʻole lawa ka mana o ka plasticizing. Pono paha e hoʻonui ke anawaena o ka screw.
- Kiʻekiʻe kiʻekiʻe i ka hoʻololi kala— He maikaʻi ʻole ka hui ʻana ma ka ʻāpana ana. ʻO kahi Maddock a i ʻole mea hoʻohui ʻia i hoʻohui ʻia i ka wili e hoʻonā pinepine i kēia.
He aha kāu e haʻi aku ai i kāu mea hana ke noi nei i kahi ʻōlelo
- Makana mīkini a me ka hoʻohālike- a i ʻole nā ana anawaena a me nā ana flange no nā mīkini maʻamau ʻole
- (mau) resin- hoʻokomo i ke ʻano hoʻopihapiha a me ka pākēneka inā pili
- Laulā nui kiʻi- ka liʻiliʻi a me ka nui ma ka grams
- Manawa pōʻaiapuni
- Nā pilikia āu e hoʻāʻo nei e hoʻoponopono— ina kekahi
E kiʻi i kahi ʻōlelo manaʻo ʻenehana mai Nanhaiya
Pane mākou i loko o 12 hola. Hiki i kā mākou hui ʻenekinia ke kuhikuhi i ka geometry screw kūpono, ka pae waiwai, a me nā ana no kāu mīkini a me ka resin - ma mua o kou hoʻokō ʻana i kahi ʻōlelo.
