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precursor manufacturers

Zhoushan Jingnai Alloy Precision Casting Co.,Ltd.

Zhoushan Jingai Alloy Precision Casting Co.,Ltd is China Wholesale precursor manufacturers and precursor factory, which is specialized in manufacturing precision plastic screw and barrel.Over the years,the main products are Nitriding screw and barrel,bimetallic alloy screw and barrel,stainless steel screw and barrel.fully hardened screw, high-speed tool steel screw and barrel which will be used at extruder and injection molding machine.they are used at extruder,such as single screw barrel,parallel twin-screw barrel,concial twin-screw barrel which used in the production plate,sheet,pipe,blow molding machine,blown film machine,the feed machine,packaging machine,foam machine,granulator,woven wire drawing machine,wire and cable,chemical fiber.etc.

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precursors Industry Knowledge Expansion

The screw barrel precursor is a mechanical device that is used to convert rotational motion into linear motion, or vice versa. It consists of a screw and a nut, with the screw thread being the most important element. The screw thread can be traced back to ancient civilizations, where it was used in a variety of applications, such as in the construction of screws for pressing olives and wine, and in the making of bolts and screws for fastening objects together.
The first recorded use of a screw barrel precursor is attributed to Archimedes, who is credited with the invention of the screw pump, which was used to lift water for irrigation purposes. The screw pump consists of a screw thread, which is wound around a central shaft, and a nut, which is placed around the screw thread. When the shaft is rotated, the nut moves along the screw thread, causing the water to be lifted. This early form of the screw barrel was a significant innovation, as it allowed for the efficient transfer of mechanical power and the ability to lift heavy loads.