| 摘要 |
A system is described wherein components such as a prepolymer and a curative are delivered by means of positive displacement pumps through a special valve at the upper end of a static mixing tube. The components pass down the tube while being intermixed to form a reaction mixture which is dispensed into a mold by means of a valve at the lower end of the tube. The special valve forms part of a recirculation system which permits bypass and recirculation of each component between dispensing operations so that the pump can continue to operate at constant velocity. The static mixing tube is pivotally suspended from an arm so that its lower end may be properly positioned with respect to a mold to be filled. Special end interlocked mixing vanes are provided in the static mixing tube for convenient disassembly. |
