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,缺失類型,缺點(diǎn)項(xiàng)目,失效預(yù)估原因,建議改善措施,備註

,,,1.產(chǎn)品設(shè)計(jì),1.產(chǎn)品設(shè)計(jì),1.在遠(yuǎn)離澆口的地方易出現(xiàn)2.結(jié)晶性塑膠易發(fā)生

,,,a.L/t要適當(dāng),a.L/t要適當(dāng),

,,,,注:L-樹脂流動(dòng)長度,

,,,,t-產(chǎn)品壁厚,

,,,2.模注設(shè)計(jì)方面,2.模具設(shè)計(jì),

,,,a.澆口位置選擇欠佳,a.改變澆口位置,

,,,b.澆口偏長,b.使?jié)部谧兌?

,,,0,c.加大澆口,

,,,d.流道偏長,d.使流道變短,

,,,e.流道偏窄,e.加寬流道,

,,,f.冷料穴較小,f.加大冷料穴,

,表面缺失,不飽模,g.噴嘴與模具口配合不好,g.模具口要和注塑機(jī)噴嘴配合完全,

,,,h.各分流道長度不一,h.盡量使各分流道長度相等,

,,,i.排氯不好,i.加排氯槽,

,,,3.成型條件部份,3.成型條件,

,,,a.注射速度偏低,a.提高注射速度,

,,,b.注射壓力偏低,b.提高注射壓力,

,,,c.注射溫度偏低,ｃ.提高注射溫度,

,,,d.從注射到保壓時(shí)間偏短,d.加大從注射到保壓的時(shí)間,

,,,e.保壓壓力偏低,e.提高保壓壓力,

,,,f.模具溫度偏低,f.提高模具溫度,

,,,g.其他,g.調(diào)整噴嘴逆流閥,

,,,4.原材料部份,4.成型材料,

,,,a.材料流動(dòng)性偏差,a.改用流動(dòng)性較好的材料,

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