Injection nozzle for metering two different viscous materials to produce electromagnetic seals has a base part and nozzle supplied with different materials

摘要

The nozzle has a base part with a tip (105) and an internal injection needle (110). The base part and the needle are each connected individual pumps supplying materials with different characteristics. Electromagnetic screening material extruded through the outer part of the nozzle surrounds a sealing polymer emerging from the needle. Independent claims are made for: a) a metering unit for applying two or more materials with different physical and/or chemical properties onto an object and which includes the claimed injection nozzle; b) a multi-functional combination seal comprising a extruded cold elastic core and a surrounding outer extrudate with different properties and whose structure varies across the cross-section or along the length.