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The multifunctional development of plastic extruders can broaden their range of applications.

Time：

2018-12-09

Among the various types of plastic machinery, the plastic extruder stands out as the core equipment and has become one of the most widely used machines in the plastics processing industry. A plastic extruder comprises an extrusion system, a drive system, and a heating–cooling system; based on the number of screws, it can be classified into single-screw, twin-screw, and multi-screw extruders. Since its introduction, the extruder has evolved rapidly, gradually establishing a trajectory of self‑driven development. Modular production of plastic extruders not only helps capture a larger market share but also enhances overall quality and accelerates capital turnover, while multifunctional advancements expand their range of applications, and trends toward larger-scale designs continue to emerge.

Modular production of plastic extruders can, on the one hand, help capture a larger market share, and on the other, significantly enhance overall product quality and accelerate capital turnover. Multi‑functional development expands their range of applications, while scaling up reduces production costs. Looking ahead, emphasis should be placed on functional integration and network connectivity, which not only saves labor but also ensures process stability, thereby substantially improving product precision.

China’s plastic extrusion machinery market has experienced rapid growth, with numerous new models being introduced. Thanks to the concerted efforts of industry experts and R&D personnel, several key types of extruders—such as vented extruders, tandem‑disc screw extruders, reciprocating pin‑screw extruders, foam extruders, extruders equipped with melt gear pumps, tandem multi‑stage extruders, and planetary screw extruders—are now manufactured domestically, with established R&D capabilities and proprietary intellectual property rights.

With the advent of new technological advancements, plastic extrusion equipment has long since moved beyond the era of manual material feeding, freeing workers from heavy physical labor and dusty working conditions. Tasks that were once performed by hand are now handled automatically by conveying systems and other automated equipment, making a significant contribution to the plastics industry.

Going forward, the market for plastic extruder mainframes and production lines will trend toward higher technological content and lower prices. Domestically produced mainframes are currently dominated by conical twin-screw and single-screw extruders, which have reached a relatively mature stage of development and enjoy strong sales volumes. However, standard specifications of these products now face oversupply, limiting their share to roughly 50%–60% of peak‑market levels.

Going forward, the focus for extruders will be on developing parallel counter‑rotating twin‑screw extruders, which are well suited for high‑throughput molding extrusion. Parallel co‑rotating twin‑screw extruders, meanwhile, will evolve toward sixth- and seventh‑generation designs featuring higher speeds and larger length‑to‑diameter ratios. As for single‑screw extruders, the trend is toward larger diameters, higher length‑to‑diameter ratios, and improved venting performance. In fact, single‑screw extruders are low‑energy‑consumption, low‑cost machines that, with appropriate technological advances, can essentially match the performance of twin‑screw extruders. For instance, most plastic extruders currently in use in the United States are single‑screw; thanks to their advanced technology, they have largely replaced twin‑screw models.