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翰昌树脂砂生产线-砂配制程序
Hachieve| Time2012/1/11 9:47:30
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翰昌树脂砂生产线-砂配制程序

为了使树脂、固化剂、偶联剂能在最短的时间里均匀复盖在砂粒表面,需利用混砂机混制。根据混制的程序不同,分为单砂双混法和双砂三混法二种,它们的混制程序如图所示。

   砂 + 固 化 剂 砂 + 固 化 剂 砂 + 树 脂

 

根据混砂机构造不同分为连续式混砂机和间歇式混砂机两种。连续式混砂机一般为搅笼式。固化剂和树脂分别通过定量泵先后加进(单砂双混)或分别加进(双砂三混法)搅笼里的砂中被螺旋叶片混合均匀后连续放出。间歇式混砂机有低速的普通搅拌机和高速旋转的碗形混砂机。需要指出的是,当树脂加入已混和有固化剂的砂中后,应该在数秒钟至半分钟内混好尽快出砂造型,不可在混砂机内混制时间过长。


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