Manufacturing method of a valve

Abstract

A method to manufacture a valve using metal injection moulding is disclosed. The valve housing comprises a welding cap for welding the upper part of the valve to the valve housing. The welding cap is placed so the upper part can be welding to the housing without damaging the inner cavity of the housing. There is a gab between the welding cap and the inner liner so the heat from the welding to not damage the inner liner allowing the inner parts of the valve to move freely.

1 . A method of manufacturing a valve, the valve comprising a housing and an upper part, wherein the housing is manufactured by metal injection moulding, the housing comprises a welding cap, and the upper part is welded to the welding cap. 
     
     
         2 . The method of manufacturing a valve according to  claim 1 , wherein the housing comprises an inner liner, the inner liner and the welding cap are separated by a groove. 
     
     
         3 . The method of manufacturing a valve according to  claim 1 , wherein there is a passage between the groove and a inner cavity. 
     
     
         4 . The method of manufacturing a valve according to  claim 1 , wherein the welding cap end is staggered compared to the inner liner end. 
     
     
         5 . The method of manufacturing a valve according to  claim 1 , wherein the upper part comprises a guiding ring meeting the inner edge of the welding cap. 
     
     
         6 . The method of manufacturing a valve according to  claim 1  wherein all parts of the housing have a uniform thickness. 
     
     
         7 . The method of manufacturing a valve according to  claim 1  wherein the dept of the welding seem are less that the thickness of the welding cap.