光泽不好1.doc

光泽不好 成型不良 File-5 光泽不好 何谓光泽不好？(1) What is Haze ? (appearance) 光泽不好的生成原因 ?由喷射纹或冷料引起CountHaze caused by jetting or cold slag??因气体原因Haze caused by gas ??因压力不足Haze caused by insufficient pressure 光泽不好的对策  ermeasure against Haze ?尝试提高保压To raise holding pressure??检查排气口 To check vent 1）何谓光泽不好？（外观）(1) What is Haze ? (appearance) 光泽不好是指成型品未粘着在模具上，即复制不良Haze indicates insufficient contact of a molded product to a mold, in other words, transcription failure.。 图1. 外观评价用的试样表面上出现的光泽不好（凹痕）Figure.1 Haze on surface of mold piece (cause from Sink mark)（*试样大小约为20cm/材料为Duracon M90） ( * Test piece size / about 10cm, Material / Duracon 图2. □120平板表面上出现的光泽不好（玻纤析出）Figure.2 Haze on surface of mold piece (cause from Glass marks)（材料为Fortron 1140A1）( Material / Fortron 1140A1 ) 2）光泽不好的生成原因 (2-1)由喷射纹或冷料引起 Haze caused by jetting or cold slag 成形品表面出现喷射纹或冷料时，因其与周围不同，因此看起来像雾一样模糊不清。多出现在浇口附近及高低不平之处When jetting or cold slag comes out on the surface of a molded product, it looks hazy for its appearance different from the surroundings. Haze appears near a gate and a place with a thickness difference。 图3. 由喷射纹引起的光泽不好Figure.3 Haze caused by Jetting (2-2)因气体原因) Haze caused by gas 这是因为气体被封堵在模具与树脂之间并妨碍两者间的粘合而发生的光泽不好。 保压力偏低或排气不畅时更容易出现。This is a haze generated by gas trapped between a mold and resin hindering close contact.Low holding pressure and insufficient gas vent promote haze generation. 图4. 因不排气而导致复制不良Figure.4 Cause of Haze generation（表面呈雾状）( when gas trap between mold and resin)(2-3)因压力不足 Haze caused by insufficient pressure 因压力偏低，因而对树脂的模具面的挤压力偏弱而引起的光泽不好。在含玻纤等填料的材料中，由于填料容易浮出表面（树脂容易沉入内侧），因此光泽不好变得更为明显This is a haze generated by low pressure causing weak press of resin to the mold surface. In a material filled with a considerable amount of filler such as glass, haze becomes more noticeable for the filler floating up to the surface (Resin tends to sink inside.)。例如，当注射速度偏低时，压力因树脂固化而无法传递到末端，从而容易在成形品末端产生光泽不好。同时，当模具温度偏低，整体固化偏快时，整个成型品上也容易出现光泽不好For instance, when injection speed is slow, pressure can not