First, you should find the best solution for your production requirements, start with assessing the status quo, as well as defining future needs. Develop a five-year projection of materials and required capacities. To insure e nominal system capacity.
Then, determine production press and conditions:
Standard compounding plants-----A line utilizing a simple water bath for strand cooling, due to the demands of throughput, flexibility, and degree of system integration. the individual layout can vary significantly.
continuous compounding plants ----where fewer product changes are involved and capacities are relatively high ，automation may be advantageous for reducing costs while increasing quality for it.
in addition, Other compounds, or some of their ingredients, may be very sensitive to moisture. For such materials, the belt-conveyor strand pelletizer is the best choice.
Three , the shape of preferred pellet,
When the preferred pellet shape is more spherical than cylindrical, the best alternative is an underwater hot-face cutter. The easiest and cheapest way of reducing plastics to an appropriate size for further processing might be a simple grinding operation. However, the resulting particle shape and size are extremely inconsistent.
Four, the temperature of thermodynamic equilibrium
In every underwater pelletizing system, a fragile temperature equilibrium exists within the cutting chamber and die plate. pellet temperature and residual moisture are inversely proportional; that is, the higher the product temperature, the lower the residual moisture. Some compounds, such as many types of TPE, are sticky, especially at elevated temperatures. This effect can be measured by counting the agglomerates—twins and multiples—in a bulk of pellets.
Finally, the maneuverability of some equipment itself, the degree of easy operation, maintenance and automation are also important factors to be considered.
If the raw material is very corrosive, we should also pay attention to the Material and service life of some contact parts, such as the spinning blades and filter screens in the centrifugal dryer. It maybe results in significant wear and tear.
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