塑膠射出成型問題診斷與產(chǎn)品模具設(shè)計(完整版)
【正文】 r PE, PP, PA, POMG : 重量 weightS : 零件厚度 thicknessD39。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(fēng)飾罩 原始設(shè)計Airconditioner Grille Original18 gatespressure: 76 MPa冷氣通風(fēng)飾罩 修正設(shè)計Airconditioner Grille Revised8 gatespressure: 75 MPa分析結(jié)果比較表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修正設(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)計比較表如何快速平衡眾多模穴之流道How to Balance Flow In A Multicavity Mold? 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)之各模穴可平衡充填。Thinwall molding part is not only a trend but also an effective way to achieve cost reduction and petitiveness increase.結(jié)構(gòu)設(shè)計和薄殼成型產(chǎn)品Structural Design Thinwall Molding Parts熔膠波前推進(jìn)MeltFront Advancement充填模式 ,積風(fēng)和熔接線Filling Patterns, AirTraps and Weld Lines Location熔接線Weld Lines材料 [Material] : PCGF50原設(shè)計 [Original] 更改設(shè)計 [Revised]更改澆口位置以重新定位熔接線Weld Lines Can Be Relocated By Changing Gate Location典型對頭熔接線伸張強度保留值Typical Butt Weld Tensile Strength Retention Values熔接線冷料井Weld Slug Well對頭熔接線 [Butt weld]熔接線冷料井[Weld slug well]積風(fēng)Air Traps排氣Vent大部份熱塑性塑膠Most ThermoplasticsA mmB mmC mmD mm耐隆和聚縮醛 ( POM )Nylon and Acetal ( POM ) A mmB mmC mmD mm進(jìn)料流道Feed Runner塑膠成品Plastic PartAD排氣孔VentBSEC. A39。A39。 這對薄壁產(chǎn)品尤然。 A ( DIA )BB = AB= 2A ( max. )Section A39。A39。 filling pattern, weld lines and air traps are changed.多澆口設(shè)計 MultiGate Design閥式澆口Valve Gate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凸片澆口Tab Gate閥澆口Valve Gate環(huán)狀澆口Ring Gate澆口種類Gate Types矩形邊緣澆口設(shè)計Rectangular Edge Gate DesignL = ~ mmW = 澆口寬度 ( mm ) gate width in mmA = 型腔表面積 ( mm2 ) surface area of cavity in mm2n = 材料常數(shù) material constant for PE, PS for POM, PC, PP for CA, PMMA, PA for PVCh = n th = 澆口厚度 ( gate thick. in mm )t = 零件壁厚 ( wall thick. in mm )Wt Lh扇形澆口設(shè)計Fan Gate DesignL= W= w= 澆口寬度 [mm] gate width in m
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