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塑料件注塑基本知識-資料下載頁

2025-01-21 23:46本頁面
  

【正文】 Venting Ejection ? Blades ? Pins ? Lifters ? Stripper rings ? Sleeves Draft ? Draft allows easier part ejection from tooling ? Conventional: 1176。 per side ? With texture: (1176。 + 176。 per .001” depth) No draft Draft Draw Direction Tooling Metal Selection Material Type Homopolymers and Unfilled Copolymers Reinforced Material Steel Type P20 S7 H13 420 Tool Steel Characteristics Medium Alloy Mold Steel Shock resisting tool steel Hot work tool steel (Cr based) Stainless steel Typical Hardness as Finished (Rockwell C) 30 36 Rc 54 56Rc 50 52Rc 50 52Rc 模流分析 (CAE) 缺陷分析 Troubleshooting ? 縮痕 ? 變形 ? 毛邊 ? 熔合線 ? 銀絲 ? 噴紋 ? 燒焦 缺陷分析 Troubleshooting ? Burn marks: – Add vents – Reduce injection speed – Move gate location 缺陷分析 Troubleshooting ? Sink marks: – Increase pack pressure or time – Reduce injection speed – Reduce rib to wall thickness ratio 缺陷分析 Troubleshooting ? Stringing: – Reduce nozzle temperature – Use depression – Use reverse taper nozzle 缺陷分析 Troubleshooting ? White Spots: – Dry material – Reduce injection speed – Adjust melt temperature 缺陷分析 Troubleshooting ? Burn Streaks: – Reduce melt temperature – Reduce injection speed – Look for contamination or material hangup 謝謝觀看 /歡迎下載 BY FAITH I MEAN A VISION OF GOOD ONE CHERISHES AND THE ENTHUSIASM THAT PUSHES ONE TO SEEK ITS FULFILLMENT REGARDLESS OF OBSTACLES. BY FAITH I BY FAITH
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