【文章內(nèi)容簡介】 thickness) 問題 (Problem)： 噴流 (Jetting) Poor Design Causing Jetting Gate Part : Handle, Refrigerator Material : ABS Problem : Jetting Mark Gas Pin 氣輔成型冰箱把手 澆口及氣針入口 澆口太小 ,導(dǎo)致噴流痕產(chǎn)生 厚度差異過大 ,導(dǎo)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 閥澆口 Valve Gate 1. 閥澆口梢 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 閥澆口 (一 ) Valve Gate ( 1 ) 全部閥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. 閥澆口 (二 ) Valve Gate ( 2 ) 部份閥澆口延遲打開，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 ( mm ) surface area of cavity in mm n = 材料常數(shù) material constant for PE, PS for POM, PC, PP for CA, PMMA, PA for PVC 2 2 h = n t h = 澆口厚度 ( gate thick. in mm ) t = 零件壁厚 ( 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, PC, PP for CA, PMMA, PA for PVC 澆口厚度 [ gate thick. in mm] t= 零件壁厚 [ 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, PC, PP for CA, PMMA, PA for PVC 澆口厚度 [ gate thick. in mm] = nt 澆口長度 [ land length in mm ] t= 零件壁厚 [ 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, PC, PP for CA, PMMA, PA for PVC 澆口厚度 [ gate thick. in mm] t= 零件壁厚 [ wall thick. in mm ] 2 2 30?nh1 = n t h2 = t L = ~ mm d = 澆口直徑 ( mm ) gate diameter in mm t = 零件壁厚 ( 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, PC, PP for CA, PMMA, PA for PVC 針點澆口設(shè)計 Pin Gate Design d L t d 0 . 2 0 6 n t A4? ?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, PC, PP for CA, PMMA, PA for PVC 澆口厚度 [ gate thick. in mm] = nt t= 零件壁厚 [ wall thick. in mm ] 30?n 2 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水力直徑 Hydraulic Diameter 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 流道尺寸設(shè)計 (1) Runner Sizing (1) D : 流道直徑 ( mm ) runner diameter in mm W : 下游塑膠重量 ( g ) downstream plastic weight L : 流道長度 ( mm ) ru