Durafide? Has many fillers such as glass fiber, so the problem of mold friction should be c***idered. A very ***all amount of corrosive gas will be produced during molding, so the mold material should h***e both friction resistance and corrosion resistance. 420 and 440C are recommended for durafide. In addition, the surface treatment of the mould is helpful to prolong the service life of the mould. Therefore, PVD method is recommended for ceramic coating
(2) 模具调温
通常用加热筒将模具加热到130℃以上,接着用油和加压热水进行调温以使模具温度分布更加均匀。 此时请将加热器安装在固定及移动侧安装板上。 |
(3) 主流道和分流道
主流道的斜度应达到2~3度,分流道的标准形状为圆形或梯形。主流道和分流道的前端必须设置冷料阱。应仔细打磨主流道。打磨不足有时会导致脱模不良。 |
(4) 浇口
点浇口和隧道浇口均可,但侧浇口的设计自由度更大。点浇口的直径为0.6mmφ,通常多为0.8~1.2mmφ,为1mmφ以上。 浇口位置很重要,同时还要注意熔合部分及纤维状填料的各向异性。 |
(5) 成型品的壁厚
原则上应设计成0.8mm以上的均壁。如果壁厚为0.2mm,则1140A1的流动距离的极限为7mm。图4-2和表4-2给出了DURAFIDE的流动xing。 |
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图4-2 1140A1的流动长度 |