Pressure control valve and method for making a pressure control valve

Abstract

A pressure control valve for an automatic transmission of a motor vehicle includes a valve unit ( 10 ) extruded from plastic, which is disposed coaxially to an actuator unit and serves for control of a fluid flow between a supply port ( 18 ) and a consumer port ( 16 ) and in which fluid channels ( 24, 26 ) and a valve chamber ( 30 ) are formed, in which a valve closing member is arranged. The fluid channels ( 24, 26 ) and the valve chamber ( 30 ) are formed on an injection-molded preform ( 22 ), which is injected into a flange ( 12 ).

1 - 5 . (canceled)  
   
   
       6 . Method for manufacturing a pressure control valve with a valve unit ( 10 ) extruded from plastic and which serves for controlling a fluid flow between a supply port ( 18 ) and a consumer port ( 16 ), and wherein fluid channels ( 24 ,  26 ) and a valve chamber ( 28 ) are formed in the valve unit ( 10 ), comprising the following steps: 
 manufacturing an injection molded preform ( 22 ), wherein the fluid channels ( 24 ,  26 ) and the valve chamber ( 28 ) are formed on the preform ( 22 ); and    extrusion-coating the preform ( 22 ) with a flange ( 12 ), wherein the consumer port ( 16 ) and the supply port ( 18 ) are formed on the flange ( 12 ), and the flange ( 12 ) represents an outer hydraulic region of the valve unit ( 10 ).    
   
   
       7 . The method according to  claim 6 , wherein before extrusion-coating of the preform ( 22 ) with the flange ( 12 ), a valve closing member ( 30 ) is inserted into the valve chamber ( 28 ) of the preform ( 22 ).  
   
   
       8 . The method according to  claim 6 , wherein openings or mouths of the fluid channels ( 24 ) and the valve chamber ( 28 ) of the preform ( 22 ) are sealed before extrusion-coating with the flange ( 12 ).