Plastic extruder development process

Early Applications
The extruder originated in the 18th century. The manual piston extruder for seamless lead pipes made by Joseph Bramah in England in 1795 is considered to be the world's first extruder. From then on, in the first 50 years of the 19th century, extruders were basically only used in the production of lead pipes, processing of macaroni and other foods, brick making and ceramics.
Wide Applications
In the development process as a manufacturing method, the first clear record was the patent applied by R. Broom in 1845 for the production of Goodport rubber wires using an extruder. H. Bewley of Goodport Company subsequently improved the extruder and used it to coat the copper wire of the first submarine cable between Dover and Calais in 1851. Over the next 25 years, extrusion became increasingly important, and electric extruders rapidly replaced manual extruders. Early mechanically operated plunger extruders produced thousands of kilometers of insulated wire and cable, firmly establishing the position of extrusion for cable production. Early cable extruders, whether manual, mechanical or hydraulic, were all plunger-type. In this production process, the plunger pressed hot gutta-percha into a die through which the copper conductor passed, and the gutta-percha was squeezed out of the die, thus coating the copper conductor to form an insulating layer.