Strand pelletizing device and method for ultra-high fluidity thermoplastic resin

Abstract

The invention discloses an ultra-high fluidity thermoplastic resin rod granulation forming device and a method thereof. The ultra-high fluidity thermoplastic resin melt flows out vertically from a mold head and falls on the guide plate of an inclined water tank, and the water flow enters the guide plate. The flow plate flows out, the speed of the material strip and the water flow are the same, and the water flow and the material strip are relatively static, so as to avoid the uneven impact of the ultra-high fluidity resin when it is cooled and formed, and the degree of crystallization of the resin is relatively large, which is conducive to maintaining the toughness inside the melt; The material strips that have been initially cooled in the inclined water tank enter the horizontal water tank, and the slitting rollers with evenly divided grooves avoid the sticking of the material strips. After passing the slitting rollers, the material strips enter the slit of the guide roller and are pulled by the guide roller and the idler Automatic transmission, after passing through the air cooling zone, it enters the granulator for granulation. After the strip enters the granulator, the granulation is not easy to be brittle, so that the granulated particles are uniform, with less fine dust and good particle appearance.

Description

technical field [0001] The invention belongs to the fields of stranding, cooling and drying of high-fluidity resins, and in particular relates to a stranding granulation forming device and method for ultra-high-fluidity thermoplastic resins. Background technique [0002] Conventional thermoplastic resin strand granulation technology is that the melt is extruded through the extruder, and the melt flows out into uniform strips from the holes arranged on the die, and is drawn into the cooling water tank, and the strands are cooled in water. Cut into pellets after air-drying. However, for ultra-high fluidity thermoplastic resins, especially thermoplastic resins with a melt index > 400g / 10min, due to the high flow rate, it is difficult to pull the strands by conventional methods, and equipment such as underwater pelletizing is required, which is expensive and expensive. The operation is complicated, and there is too much waste in the process of starting and stopping. However...

AI Technical Summary

Problems solved by technology

However, for ultra-high fluidity thermoplastic resins, especially thermoplastic resins with a melt index > 400g / 10min, due to the high flow rate, it is difficult to pull the strands by conventional methods, and equipment such as underwater pelletizing is required, which is expensive and expensive. Complicated operation, too much waste during startup and shutdown

However, ordinary strand pelletizing also has problems such as ultra-low resin molecular weight, insufficient toughness, brittleness, and a large amount of dust is easily generated during the pelletizing process. In addition, artificial strands are used in the prior art. Since the strands are high-temperature melts, The operator needs to directly contact the high-temperature melt, which is easy to burn; when the number of strips is large, the width is large, and it is difficult to manually grasp and pull

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