Twin Screw Extruders Barrel

A wide variety of mechanical equipment are available in the market like mechanical control system, mechanical brake, forging and extrusion equipment, mechanical safety and security equipment, mechanical sub systems, mechanical test and measuring instruments, leather machinery, dies, moulds, fabrication machinery, electro-mechanical actuators and many other miscellaneous mechanical equipment. They are available in different shapes, sizes, models and capacities. They also come with various types of functions, which suits individual's requirements. Some mechanical equipment is also made as per customer's specifications and requirements. Mechanical equipment is used in most of the industrial sectors.

An extruder barrel for twin screw extruders- the barrel body has a removable insert firmly seated in an insert receiving opening extending centrally and longitudinally there through. The insert has two circular bores with parallel axes extending centrally and longitudinally there through, the bores being in communication along a common chord. The walls of the bores have a wear and corrosion resistant layer that is a powder metallurgical material that is preferably applied by hot isotactic pressing. The preferred powder metallurgical material forming the wear resistant layer is a composition containing at least 50% by weight tungsten carbide with the remainder being nickel. The outer surface of the insert has a thin layer of a heat conductive, malleable material, such as copper, adhered thereto. An extruder barrel for a twin screw extruder comprising: a barrel body having an insert receiving opening extending centrally and longitudinally there through; a removable insert firmly seated in said insert receiving opening of said barrel body; said insert comprising a seamless insert body having upper and lower planar surfaces and arcuate sides, said body having two circular bores having parallel axes extending centrally and longitudinally there through, said circular bores being in communication with each other along a common chord; the walls of said circular bores having a wear and corrosion resistant layer formed of a consolidated powder metallurgical material adhered to said walls; and a thin layer of a heat conductive, malleable material adhered to the outer surface of said insert body.

The objects of this twin screw barrel providing an insert for a twin screw extruder barrel or barrel segment that is easy to insert and remove from a barrel. The barrel insert of the invention is a seamless body having two circular bores extending centrally and longitudinally there through, the circular bores being in communication with each other along a common chord .The walls of the bores of the insert are layered with a consolidated, wear and corrosion resistant, powder metallurgical composition. The powder metallurgical composition is preferably formed on the bore walls by hot isotactic pressing, but may be formed by plasma arc welding with a plasma torch heated by an ac or dc arc.