【正文】 ~ 25186。 Void 澆口 gate 澆口 gate 差的 Poor 好的 Good 噴流 Jetting 使用沖擊型澆口以避免噴流 Avoid Jetting by Using Impingement Gate 差的 Poor 好的 Good 差的 Poor 好的 Good 使用沖擊型澆口以避免噴流 Avoid Jetting by Using Impingement Gate 使用擊片澆口以避免噴流 Avoid Jetting by Using Tab Gate 使用適當?shù)臐部谛螤钜员苊鈬娏? Avoid Jetting by Profiling Gate Properly 差的 Poor 好的 Good 幫浦零件 (Part, Pump) 塑料 (Polymer): POM 進澆處 (Polymer entrance)： 澆口厚 (Gate thickness) ， 型腔厚 (Cavity thickness) 問題 (Problem)： 噴流 (Jetting) Poor Design Causing Jetting Gate Part : Handle, Refrigerator Material : ABS Problem : Jetting Mark Gas Pin 氣輔射出成型冰箱把手 澆口及氣針入口 澆口太小 ,導致噴流痕產(chǎn)生 厚度差異過大 ,導致二次噴流痕產(chǎn)生 R角過小 ,氣體通路接近把手內(nèi)側(cè) ,外側(cè)則因體積收縮造成凹陷痕跡 閥式澆口 Valve Gate 1. 閥式澆口梢 ValveGate Pin 2. 加熱管 Heater 3. O型環(huán) 610 0 Ring 4. 流道歧管模板 Manifold Plate 5. 軸封環(huán) Seal Retainer 6. 套筒軸封 Sleeve Seal 7. 枕塊 Support Pillar 8. 油壓缸 Hydraulic Cylinder 閥式澆口 (一 ) Valve Gate ( 1 ) 全部閥式澆口同時打開時之充填狀況 Mold filling with all the valve gates ( shutoff gates ) opened at the same time. 閥式澆口 (二 ) Valve Gate ( 2 ) 部份閥式澆口延遲打開，改變充填模式 Mold filling with delayed valve gate opening。 First, adjust runner size in one branch to make flow balanced in this branch. ? 再調(diào)整各支流道前段之尺寸，使各支流道可平衡充填。 Melt front reaches the ends of cavity at the same time. 洗衣機圈板 洗衣機圈板 冷氣通風飾罩 原始設(shè)計 Airconditioner Grille, Original 18 gates pressure: 76 MPa 冷氣通風飾罩 更正設(shè)計 Airconditioner Grille, Revised 8 gates pressure: 75 MPa 分析結(jié)果比較 Comparison of Analysis Results 十二澆口設(shè)計 12 Gate Design 原始設(shè)計 Original Design 電子零件置物箱 材料 Material： ABS 四澆口設(shè)計 4 Gate Design 更正設(shè)計 Revised Design 電子零件置物箱 材料 Material： ABS 電子零件置物箱四澆口 和十二澆口設(shè)計比較表 原始設(shè)計 修正設(shè)計澆口數(shù)目 12 4充填時間 ( s ) 2 2最大射壓 ( M P a) 58 . 4 61 . 8鎖模力需求 ( T o n) 950 820產(chǎn)品重量 ( g ) 4136 4136流道系統(tǒng)重量 ( g ) 294 98 論語 ?季氏第十六 不患寡而患不均， 不患貧而患不安。 A39。A39。 The gate located on the left side creates static weldlines in the middle of these louvers. 熔接線 Weld Lines 熔接線 Weld Lines 這一部分充填的產(chǎn)品，顯示了兩條靜態(tài)的熔接線，在外面二孔外產(chǎn)生； 澆口位於產(chǎn)品上邊中央。 靜態(tài)的熔接線位於型腔的末端， 一般比靠近澆口的動態(tài)的熔接線脆弱而且明顯。 這樣的線條也稱作熔合線。 As long as the cavity is able to be filled appropriately, gates are the less the better. 為了減少 澆口數(shù)目，每一澆口應(yīng)就塑流力所能及的流長 /壁厚比之內(nèi)，找出可以涵蓋最大零件面積的進澆位置 。 While designing injection molded parts in high mold shrinkage factor materials, the designer should try to limit wall thickness variations to 10%. The allowable wall thickness variation for the low mold shrinkage factor materials can be up to 25%. 收縮 Shrinkage 塑膠模具設(shè)計 Plastic Mould Design 徐昌煜 Charles Hsu 模具設(shè)計的優(yōu)先順序 Priorities of Mould Design 澆注系統(tǒng)設(shè)計 (Filling System Design) 排氣系統(tǒng)設(shè)計 (Venting System Design) 冷卻系統(tǒng)設(shè)計 (Cooling System Design) 脫模系統(tǒng)設(shè)計 (Ejecting System Design) 澆注系統(tǒng)設(shè)計 Filling System Design 徐 昌 煜 Charles Hsu 澆注系統(tǒng)設(shè)計的優(yōu)先順序 Priorities of Filling System Design 產(chǎn)品設(shè)計 (Part Design) 型腔設(shè)計 (Cavity Design) 澆口設(shè)計 (Gate Design) 流道設(shè)計 (Runner Design) 豎澆道設(shè)計 (Sprue Design) 噴嘴設(shè)計 (Nozzle Design) 豎澆道 Sprue 主流道 Main Runner 成品 Part 澆口 Gate 冷料井 Cold Slug Well 支流道 Branch Runner 典型的澆注系統(tǒng) Typical Filling System 每增加一個澆口，至少增加一條熔接線，同時增加一個澆口痕跡、增加流道的體積以及增加較多的積風 。 It is easier to maintain dimensional reproducibility with low mold shrinkage factor amorphous materials. The published mold shrinkage data is based on a molded part with a () wall thickness. 收縮 Shrinkage 設(shè)計射出成型零件，當塑料收縮率高時，應(yīng)試圖限制壁厚變化在 10%之內(nèi) 。 The semicrystalline plastics has higher mold shrinkage factors. These materials have the additional problem of different shrinkage factors parallel to and perpendicular to the direction of melt flow. This problem is further pounded by variations in the degree of crystallinity caused by changes in molding conditions. If the material is cooled slowly, there will be an increase in crystallinity and mold shrinkage. 收縮 Shrinkage 非結(jié)晶塑料收縮率低，較易維持尺寸的複現(xiàn)性。 這問題又因成型條件改變致使結(jié)晶度變化而更形複雜。 The designer must indicate where the texture stops and starts. A good texturing note should indicate the pattern number, depth of texture, its location, and if appropriate the direction of the pattern. In those instances where several parts fit together in one product, the direction of the texture pattern absolutely must be specified. 咬花 Texture 設(shè)計者完成產(chǎn)品設(shè)計之前，能做的最重要的單一事項，就是會同專業(yè)的咬花供應(yīng)商作專案檢討。 一個好的咬花標註，應(yīng)該指出花紋號碼 、咬花深度、 咬花位置，如果要更得當?shù)脑挘€要加上花紋的方向。 The rule of thumb, applied to the side wall of cavities that the material shrinks away from as it cools, is a minimum of 176。 有些咬花供應(yīng)商要求在公模側(cè)模壁 (冷卻時，塑料向其包裹 ) ，提供 2倍的脫模角。 Generally speaking, the cost and delivery time increases with the decision to go from EDM‘ing to blasting to PCE‘ing. All three techniques can provide varying degrees of matte finishes. The more detailed finishes, such as fabric or weathered wood, are available only with PCE‘ing. Note: PCE is Photo Chemical Etching 表面花紋 Pattern 根據(jù)經(jīng)驗法則，對母模側(cè)模壁 (冷卻時，塑料從其離開 )而言，每 ， 單邊至少要有 176。 所有方法都能供給不同程度的表面花紋。 換言之，為何要花錢在消費者無法感激的表面光滑度上？ Most consumers will not notice the differences between the SPI Guide three highest finishes on an opaque part. The two best SPI finishes should be reserved for transparent, seethrough parts. In other words, why spend money on a surface finish that the consumer cannot appreciate ? 表面光滑度 Surface Finish 產(chǎn)品圖上必頇標明表面光滑度，高度建議參照 SPI模具光滑度指南。 這個平均值當然會有明顯的差異，這要看模具的尺寸和形狀、金屬的硬度、 要求拋光的程度、 以及拋光前模面的光滑程度。然而，我們可以倚賴塑料供應(yīng)商和有經(jīng)驗的成型者， 他們知道那一種模面光滑度適合那一種特定的塑料。 對這些硬而脆的材料，抽拋是非常有益的 。 這類黏的材料，一般較易從粗糙面或輕度噴砂面脫模。 保壓不足的產(chǎn)品無法忠實的複現(xiàn)模面的光滑。 補強料加得多的塑料不能有