Introduction And Development History Of Extruder

The extruder is one of the types of plastic machinery and originated in the 18th century.
According to the direction of the material flow of the extruder head and the angle between the screw center line, the extruder head can be divided into a right-angle head and an oblique head.
The screw extruder relies on the pressure and shear force generated by the rotation of the screw, which allows the material to be fully plasticized and evenly mixed, and then formed through the die. Plastic extruders can be basically classified into twin-screw extruders, single-screw extruders, and rare multi-screw extruders and screw-less extruders.
Development History
The extruder originated in the 18th century. The manual piston extruder for manufacturing seamless lead pipes manufactured by Joseph Bramah (England) in 1795 is considered to be the world's first extruder. From then on, during the first half of the 19th century, extruders were basically used only in the production of lead pipes, the processing of macaroni and other foods, and the brick-making and ceramic industries. In the development process as a manufacturing method, the first clear record was R. Brooman's patent application for the use of an extruder to produce Goodbo rubber wires in 1845. H. of Goodbo Company. Bewlgy subsequently improved the extruder and in 1851 used it to coat the copper wires of the first submarine cable between the Dover and Calais companies. In 1879, the British M. Gray obtained the first patent for an Archimedean spiral screw extruder. Over the next 25 years, extrusion methods became increasingly important, and electrically operated extruders quickly replaced the previous manual extruders. In 1935, German machinery manufacturer Paul Troestar produced an extruder for thermoplastics. In 1939, they developed the plastic extruder to the current stage - the modern single-screw extruder stage.