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Rubber extrusion is a method used to make rubber items. In this process, either synthetic or natural rubber that hasn't been hardened yet is put through a machine called an extruder. This machine has a desired shaped mold and a pressurized conveyor system. The rubber gets heated and softened in the extruder, making it bendable.
Extrusion Machine. The first precursors to the modern extruder were developed in the early 19th century. In 1820, Thomas Hancock invented a rubber "masticator" designed to reclaim processed rubber scraps, and in 1836 Edwin Chaffee developed a two-roller machine to mix additives into rubber. [2]
A plastic extrusion machine extrudes plastic in a continuous profile. The main machine is usually called the host, and its accompanying equipment are called the plastic auxiliary equipment. Plastic extruders can make plastic film/wrapping, packing tape, corrugated sheets, plastic lumber, pipes, tubes, insulated wire, monofilament and nets.
At the CEO’s direction, Charles S. Jones’s firm divested the Roll Grinder products division, the Railroad products division, the steel extrusion division, and a 25% equity stake in the Italian Pomini enterprise. The Railroad products division was acquired by Simmons Machine Tool Corporation (now NSH USA Corporation) in Albany, New York. [5]
Extrusion is also used for sidewall profiles and inner liners. The calender is a set of multiple large-diameter rolls that squeeze rubber compounds into a thin sheet, usually of the order of 2 metres wide. Fabric calenders produce an upper and lower rubber sheet with a layer of fabric in between. Steel calenders do so with steel cords.
Rubber Technology is the subject dealing with the transformation of rubbers or elastomers into useful products, such as automobile tires, rubber mats and, exercise rubber stretching bands. The materials includes latex , natural rubber , synthetic rubber and other polymeric materials, such as thermoplastic elastomers .