Patent ID: 8777697

Claim:
A method for manufacturing a focusing gun ( 1 ) for spraying a liquid at a very high pressure, for a machine for spraying liquid at a very high pressure, comprising: two pieces ( 2 , 2 ), each piece comprising an assembly face (J), wherein the two pieces ( 2 , 2 ′) are joined to form the focusing gun ( 1 ): wherein each assembly face (J) includes a central groove ( 3 ) formed in a planar median region ( 4 , 5 ) of each said assembly face and adapted to extend between two ends thereof, said central grooves being adapted to form a duct ( 12 ) of the focusing gun ( 1 ) in the assembled position of the two pieces ( 2 , 2 ′), wherein in the assembly face (J) of at least one of the two pieces ( 2 , 2 ′), laterally with respect to the planar median region ( 4 , 5 ) thereof, at least one bonding reservoir ( 9 ) intended to be filled with a quantity of adhesive substance ( 11 ) adapted to adhere to a portion of the assembly face (J) of the other piece ( 2 ′, 2 ) lying opposite said reservoir, in the assembled position of the two pieces, wherein each bonding reservoir ( 9 ) is filled with adhesive substance ( 11 ), and the two pieces ( 2 , 2 ′) are placed in contact so that they are joined by their assembly faces (J) and connected by means of the adhesive substance ( 11 ), said method being characterized in that: wherein on the assembly face (J) of at least one piece ( 2 , 2 ′), at least one centering rib ( 6 ) is formed, which projects from said assembly face, and, wherein for each centering rib ( 6 ) formed on the assembly face (J) of one piece ( 2 , 2 ′), a central cavity ( 7 ) is formed in the assembly face (J) of the other piece ( 2 ′, 2 ), the central cavity having dimensions adapted to tightly receive each said respective centering rib in the assembled position of the two pieces, in which the central grooves ( 3 ) form the duct ( 12 ) of the focusing gun ( 1 ).