The Development History of Plastic Granulator

When it comes to plastic granulator, many people are not unfamiliar with, but when it comes to its development history, many people must not know!

The world's twin-screw plastic granulator for thermoplastic processing originated in Italy in the 1930s, and at the same time, Germany also produced a screw injection machine.

In the 1950s and 1960s, a mixing twin-screw extruder and a large single-screw extruder granulator appeared.

In the 1970s, there was a "building block" twin-screw extruder, which was mainly used for pelletizing.

In the 1980s, a twin-screw plus gear pump, twin-screw plus single-screw series combination extrusion plastic granulator appeared.

A few days ago, the classification of plastic granulators is mainly based on large, medium and small, but there is no unified opinion. For the time being, the application of plastic granulators is preliminarily divided. The plastic granulator for large devices is tentatively designated as a large-scale plastic granulator. my country has also introduced large-scale ethylene plants with an annual output of 35,000 to 300,000 tons, large-scale polypropylene plants with an annual output of 35,000 to 140,000 tons, and small bulk polypropylene plants with an annual output of 35,000 to 140,000 tons. Only 0.2 million tons to 20,000 tons.

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