Zvinoita Screw Barrel Chaizvoizvo
Iyo screw nebarrel inoshanda sepaya inofananidzwa. Heino kutevedzana kwese kutenderera:
- Kudyisa- Plastic pellets anodonha kubva muhopi achipinda munzvimbo yekudyisa.
- Melting— Siruu inotenderedza inoburitsa kupisa kweshear. Yakasanganiswa nembiya heaters, pellets inonyunguduka uye compress.
- Metering- Kunyungudika kunova yunifomu mukupisa uye kumanikidza pamberi pejekiseni.
- Jekiseni- Iyo screw inoenda kumberi kunge plunger, ichisundira purasitiki yakanyungudutswa muforoma.
Yese dhizaini inosiyana - geometry, zvikamu zvenzvimbo, kurapwa kwepamusoro - inokanganisa kuti matanho mana aya anoitika sei. Kusawirirana mune chero ipi zvayo kunoratidza sedambudziko rekugadzira.
Sarudzo 1: L/D Ratio
Chiyero cheL/D (screw flighted length yakakamurwa nedhayamita yaro) ndiyo nhamba yakakosha pane spec sheet. Inodzora nguva yekugara, kusanganisa kunaka, uye kugovera kupisa.Mazhinji-chinangwa ekuumba majekiseni ekushandisa anoshandisa 20:1.
| Resin | Inokurudzirwa L/D |
|---|---|
| PP, PE, PS (yakajairwa) | 18:1 – 20:1 |
| ABS, PC | 20:1 – 24:1 |
| PVC (inodzivirira kupisa) | 16:1 – 20:1 |
| PET | 20:1 – 22:1 |
| Nylon (PA) | 18:1 – 20:1 |
| GF-yakasimbiswa zvinhu | 20:1 – 24:1 |
Chisarudzo chechipiri: Compression Ratio
Iyo compression reshiyo (CR) inoyera kuti yakawanda sei screw chiteshi inotetepa kubva kunzvimbo yekudyisa kuenda kunzvimbo yemamita. Yepamusoro CR inomanikidza kunyungudika zvakanyanya - yakanaka kune amorphous resins inopfava zvishoma nezvishoma. Lower CR yakapfava, ndizvo zvauri kuda zvekupisa-sensitive kana fiber-filled materials.
| 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 |
| GF-yakasimbiswa (≥15%) | 2.0 – 2.5:1 |
Sarudzo 3: Zone Proportions
Iyo yakajairwa jekiseni screw inokamura kuita zvikamu zvitatu. Huwandu hwenzvimbo yega yega hune basa sehuwandu hweL/D.
- Feed Zone (L1):Nzira dzakadzika dzinogamuchira mapellets akasimba kubva kune hopper. Yakareba = yakawanda yekuwedzera kugona.
- Compression Zone (L2):Kudzika kwechiteshi kunoderera zvishoma nezvishoma. Kunyanya kunyungudika kunoitika pano.
- Metering Zone (L3):Kudzika, kunoenderana nzira. Inochengetedza yunifomu inonyunguduka tembiricha uye kumanikidzwa pamberi pejekiseni.
| Resin | Kudyisa (L1) | Kudzvanya (L2) | Metering (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% |
Sarudzo 4: Screw Barrel Material
38CrMoALA — The Standard Baseline
Nanhaiya's injection molding screws inogadzirwa kubva38CrMoALA alloy simbi, kupiswa uye kudzima. Iyi nheyo yezvinhu inobata yakajairwa thermoplastics sePE, PP, PS, uye ABS zvakanaka, ine hupenyu hwesevhisi hunosvika.10,000–20,000 maawapasi pemamiriro ekushanda akajairika.
Nitriding
Gasi nitriding pa500–560°C inoumba nitrided layer0.5–0.8mm ukobvunekuoma kwe950–1050 HV (~62 HRC). Izvi zvinonatsiridza kusamira kwekupfeka ne 30-40% zvichienzaniswa nesimbi isina kugadzirwa. Yakajairwa kune akawanda majekiseni ekuumba maapplication anoshanda asina kuzara kana kuzara zvinyoro.
Nanhaiya mutant (abrupt) jekiseni rekuumba siruu - inokodzera crystalline resin sePP, PE, uye Nylon.
Bimetallic - YeAbrasive Applications
Bimetallic barrels ane high-alloy kupfeka-resistant lining metallurgically bonded to the barrel bore. Nanhaiya's bimetallic process inowana anmukati wakabereka kuoma kwe62 HRCkuburikidza neyakaoma alloy spray welding yakatenderedza-yakakwirira-kupfeka nzvimbo dzemukati wedhiramu.
| Application | Screw Material | Barel Treatment |
|---|---|---|
| PE, PP, PS (isina kuzadzwa) | 38CrMoALA nitrided | Standard nitrided |
| ABS, PC, Nylon (isina kuzadzwa) | 38CrMoALA nitrided | Standard nitrided |
| PA + GF ≤30% | 38CrMoALA, yakadzimwa + yakatsamwa | Nitrided kana bimetallic |
| GF yemukati 15–50% | Bimetallic / TC mipendero yendege | Bimetallic |
| PVC / corrosive resins | Corrosion-resistant alloy | Bimetallic (CR giredhi) |
| Carbon fiber yakazadzwa | Tungsten carbide | TC-sprayed bore |
Sarudzo 5: Screw Diameter uye Shot Size
Kupfura kwako chaiko kunofanira kuwira pakati35% uye 70%yehukuru hwekupfura kwe screw. Pazasi pe35%, zvinhu zvinogara mudhiramu zvakanyanyisa uye zvinokanganisa kudzikira. Pamusoro pe70%, screw haigone kupora nekukurumidza mukati mekutenderera.
Pazasi pane akajairika masisitimu anowanikwa kubva kuNanhaiya:
| Jekiseni Mari (g) | Kureba Ø × Kureba (mm) | Barel Ø × Kureba (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 zvishoma nezvishoma jekiseni rekuumba screw - zvirinani kune amorphous resins seABS, PC, uye PMMA.
Yambiro Zviratidzo Chikurukuru Chako Chazvino Hachina Kushanda Basa
- Mavara matema kana mavanga ekutsva-Kusvibisa zvinhu kubva panguva yakawandisa yekugara kana nzvimbo inopisa. Tarisa tembiricha yebhari uye screw clearance.
- Huremu hwepfuti husingaenderani— Kazhinji vharuvhu isingadzose inopfekwa kana yakawandisa screw-to-barrel clearance inobvumira kuyerera kumashure.
- Splay marks pamusoro— Hunyoro kana gasi mukunyunguduka. Inogona kuratidza kusakwana pre-kuyaomesa kana screw geometry isiri kubuda zvakanaka.
- Kunonoka kupora / kureba kutenderera nguva- Plasticizing simba haina kukwana. Screw diameter inoda kuwedzera.
- High scrap pakuchinja kwemavara- Kusakwana kusanganisa munzvimbo yemamita. A Maddock kana chipingamupinyi chinosanganisa chinhu chakawedzerwa kune screw kazhinji chinogadzirisa izvi.
Zvekutaurira Mugadziri Wako Kana Achikumbira Koti
- Machine brand uye modhi- kana kubereka dhayamita uye flange zviyero zveasina-standard michina
- Primary resin(s)- sanganisira rudzi rwekuzadza uye muzana kana zvichibvira
- Shot size range- shoma uye yakawanda mumagiramu
- Target kutenderera nguva
- Matambudziko auri kuedza kugadzirisa- kana iripo
Tora Kurudziro yehunyanzvi kubva kuNanhaiya
Tinopindura mukati maawa gumi nemaviri. Chikwata chedu cheinjiniya chinogona kutsanangura iyo chaiyo screw geometry, giredhi yezvinhu, uye zviyero zvemuchina wako uye resin - usati wazvipira kune quote.
