【正文】 rial： 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。 孔子 如何快速平衡多型腔模之塑流 How to Balance Flows In A Multicavity Mould ? 首先調(diào)整一排支流道內(nèi)之次支流道尺寸，使此支流道內(nèi)之各型腔可平衡充填。 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。 Then, adjust the first section‘s runner size in each branch to make flow balanced in all branches. 一排支流道之不平衡充填 Unbalanced Flow In A Branch 一排支流道平衡後之充填 Balanced Flow In A Branch 128型腔模之不平衡充填 Unbalanced Flow In A 128 Cavity Mould 128型腔模平衡後之充填 Balanced Flow In A 128 Cavity Mould The runner system shows that warmer, lowviscosity material (yellow and red) follows the inside wall when the melt splits at an intersection. Melt ” Flipper ” 剪切速率 Shear Rate 剪 切 應(yīng) 力 shear stress 黏 度 viscosity 剪 切 速 率 shear rate 剪切應(yīng)力 Shear Stress 澆口種類 Gate Types 針點澆口 Pin Gate 扇型澆口 Fan Gate 潛伏澆口 Submarine Gate 邊緣 (薄膜 )澆口 Edge ( Film ) Gate 擊片澆口 Tab Gate 閥式澆口 Valve Gate 環(huán)狀澆口 Ring Gate 導致平直製件的澆口設(shè)計 Gate Design for Flat Part 中心澆口 Center Gate 扇形澆口 Fan Gate 最壞的 Worst 壞的 Worse 較好的 Better 最好的 Best 側(cè)澆口 Edge Gate 薄模澆口 Film Gate 澆口設(shè)計 (減少滯流效應(yīng) ) Gate Design to Avoid Hesitation 澆口 gate 薄 thin 厚 thick 差的設(shè)計 Poor 好的設(shè)計 Good 薄 thin 厚 thick 澆口 gate ， 遲滯現(xiàn)象 在 幫浦零件 (Part, Pump) 塑料 (Polymer): POM 公稱厚度 沒有遲滯現(xiàn)象 幫浦零件 (Part, Pump) 塑料 (Polymer): POM 澆口設(shè)計 (避免凹陷和空洞 ) Gate Design to Avoid Sink Mark amp。 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。 filling pattern, weld lines and air traps are changed. 多澆口設(shè)計 Multigate Design 閥式澆口 Valve Gate 矩形邊緣澆口設(shè)計 Rectangular Edge Gate Design L = ~ mm W = 澆口寬度 ( mm ) gate width in mm A = 型腔表面積 ( mm2 ) surface area of cavity in mm2 n = 材料常數(shù) material constant for PE, PS for POM, PP for ABS for CA, PMMA, PA , PC for PVC h = n t h = 澆口厚度 ( gate thick. in mm ) t = 製件壁厚 ( wall thick. in mm ) W t L h 30AnW ?扇形澆口設(shè)計 Fan Gate Design L= W= w= 澆口寬度 [mm] gate width in mm A= 型腔表面積 [ mm ] surface area of cavity in mm n= 材料常數(shù) [ material constant ] for PE, PS for POM, PP for ABS for CA, PMMA, PA , PC for PVC 澆口厚度 [ gate thick. in mm] t= 製件壁厚 [ wall thick. in mm ] 2 2 30?n h1 = n t h2 = wh1/D 重疊式澆口設(shè)計 Overlap Gate Design W= w= 澆口寬度 [mm] gate width in mm A= 型腔表面積 [ mm ] surface area of cavity in mm n= 材料常數(shù) [ material constant ] for PE, PS for POM, PP for ABS for CA, PMMA, PA , PC for PVC 澆口厚度 [ gate thick. in mm] = nt 澆口長度 [ land length in mm ] t= 製件壁厚 [ wall thick. in mm ] 2 2 30?n L1 = ~ L2 = h+( w/2 ) 擊耳澆口設(shè)計 Tab Gate Design L= ~ W= w= 澆口寬度 [mm] gate width in mm A= 型腔表面積 [ mm ] surface area of cavity in mm n= 材料常數(shù) [ material constant ] for PE, PS for POM, PP for ABS for CA, PMMA, PA , PC for PVC 澆口厚度 [ gate thick. in mm] t= 製件壁厚 [ wall thick. in mm ] 2 2 30?nh1 = n t h2 = t 針點澆口設(shè)計 Pin Gate Design L = ~ mm d = 澆口直徑 ( mm ) gate diameter in mm t = 製件壁厚 ( mm ) wall thick. in mm A = 型腔表面積 ( mm ) surface area of cavity in mm n = 材料常數(shù) material constant for PE, PS for POM, PP for ABS for CA, PMMA, PA , PC for PVC d L t d 0 . 2 0 6 n t A4? ?22潛伏式澆口設(shè)計 Subgate Design W= w= 澆口寬度 [mm] gate width in mm A= 型腔表面積 [ mm ] surface area of cavity in mm n= 材料常數(shù) [ material constant ] for PE, PS for POM, PP for ABS for CA, PMMA, PA , PC for PVC 澆口厚度 [ gate thick. in mm] = nt t= 製件壁厚 [ wall thick. in mm ] 30?n2 30? ~ 15186。 ~ 25186。 2 水力直徑 Hydraulic Diameter PAD H4?Where is the hydraulic diameter 水力直徑 A is the crosssectional area of the flow 流路斷面積 P is the wetted perimeter 濕 周長 HD在不同剖面形狀，相同斷面積下之變化 Various runner profiles, based on the same crosssectional area 水力直徑 Hydraulic Diameter 流道尺寸設(shè)計 (1) Ru