Conductive seal as well as a method and apparatus for its production

Abstract

A conductive seal that is formed on a first sealing surface by extruding an elastically curing material intermixed with conductive particles is in addition intermixed with magnetic particles. After applying the material to the first sealing surface, its cross section profile is expanded to an adjustable level towards a second sealing surface and/or sealing rims are molded to it by a magnetic force from an electromagnetic plate. The magnetic and conductive particles are preferably concentrated in the marginal sections, particularly due to magnetic forces that act on the sealing roving in the extrusion process.

1 - 16 . (canceled)  
   
   
       17 . An apparatus for executing for producing a conductive seal made of an elastically curing sealing material intermixed with conductive particles that is directly applied from an extruder onto a first sealing surface while still in its plastic state, the extruder being movable in accordance with the shape of a second sealing surface above the first sealing surface to dispense sealing material onto said first sealing surface, the method being characterized in that magnetic particles are intermixed with the sealing material prior to or after extrusion and that, after the sealing material has been applied onto the first sealing surface ( 5 ) and subsequent curing of just a surface layer, a magnetic field is generated over a specific period of time using an electromagnetic plate ( 7 ) placed above an extruded sealing roving ( 1 ′) and the sealing roving ( 1 ′) that adheres to the first sealing surface ( 5 ) is stretched towards the electromagnetic plate ( 7 ) and molded into a finished seal ( 1 ) due to the action of magnetic forces on the magnetic particles, the apparatus being characterized in that the electromagnetic plate ( 7 ) can be moved horizontally and vertically, that can for a limited time be connected to a power source to generate a magnetic field, and that can be positioned at a specific height on, or at a distance above the extruded sealing roving ( 1 ′).  
   
   
       18 . The apparatus according to  claim 17 , characterized in that the electromagnetic plate ( 7 ) is either even on the side that faces the seal or comprises a profile ( 8 ) of at least one prominence/indentation that matches the orientation of the seal.  
   
   
       19 . The apparatus according to  claim 17 , characterized in that the profile ( 8 ) is variably dimensioned to compensate graduations in the sealing surfaces of a housing.  
   
   
       20 . The apparatus according to  claim 18  or  19 , characterized in that solenoid segments ( 10 ) are provided along the profile ( 8 ) that can be activated at intervals and provide varying magnetic force.  
   
   
       21 . The apparatus according to  claim 17 , characterized in that the electromagnetic plate ( 7 ) is coated with a parting compound on the side that faces the sealing roving ( 1 ′).  
   
   
       22 . A conductive seal for electromagnetic and material sealing between a first sealing surface and a second sealing surface, comprising an elastically curing material, intermixed with conductive particles, the seal being produced in accordance with a method in which the elastically curing material intermixed with conductive particles is directly applied from an extruder onto the first sealing surface while still in its plastic state, the extruder being movable in accordance with the shape of the second sealing surface, the method being characterized in that magnetic particles are intermixed with the sealing material prior to or after extrusion and that, after the sealing material has been applied onto the first sealing surface ( 5 ) and subsequent curing of just a surface layer, a magnetic field is generated over a specific period of time using an electromagnetic plate ( 7 ) placed above an extruded sealing roving ( 1 ′) and the sealing roving ( 1 ′) that adheres to the first sealing surface ( 5 ) is stretched towards the electromagnetic plate ( 7 ) and molded into a finished seal ( 1 ) due to the action of magnetic forces on the magnetic particles, the seal being characterized in that the seal has a cross section that stretches towards the second sealing surface to improve the sealing effect and to compensate height variation of a sealing gap and the freshly extruded ( 1 ′) sealing roving.  
   
   
       23 . The seal according to  claim 22 , characterized in that at least one protrusion/indentation is molded onto a side of the seal that faces the second sealing surface to form at least one highly elastic sealing rim ( 9 ).  
   
   
       24 . The seal according to  claim 22  or  23 , characterized in that the elastic material for the seal is rubber or foam elastic and cures at room temperature, increased temperature, or when exposed to UV radiation.  
   
   
       25 . The seal according to  claim 22  or  23 , characterized in that the conductive particles and the magnetic particles are single-piece particles made of a silver-coated core of iron or nickel or another magnetic material or just of nickel, or that they each include separate conductive and magnetic particles.  
   
   
       26 . The seal according to  claim 22  or  23 , characterized in that separate or single-piece and magnetic particles are concentrated in the perimeter portion of the seal ( 1 ).