High pressure nozzle and method for the manufacture of a high pressure nozzle

Abstract

High pressure nozzle and method for the manufacture of a high pressure nozzle. The high pressure nozzle has a jet director located within a supply channel leading to a discharge opening. In an area directly surrounding the supply channel median longitudinal axis, the jet director has a free flow cross-section.

1 .- 17 . (canceled) 
     
     
         18 . Method for the manufacture of a high pressure nozzle for descaling steel products, the method comprising the following steps:
 mixing metal powder with plastic binder to obtain a mixture,   die casting the mixture in a mold to obtain a casted mixture in the general shape of at least one part of a nozzle,   removing the binder from the casted mixture by chemical and/or thermal processes,   forming an intermediate product, and   sintering the intermediate product after the step of removing the binder.   
     
     
         19 . Method according to  claim 18 , wherein the at least one part is a plurality of parts and the method further comprises the step of assembling the parts prior to the step of sintering of the intermediate products. 
     
     
         20 . Method according to  claim 18 , wherein the metal powder at least partly contains hard metal powder. 
     
     
         21 . Method according to  claim 18 , wherein the manufactured high pressure nozzle has at least one filter and a jet director forming a filter and jet director component, assembled from at least two individual parts which are permanently interconnected by sintering. 
     
     
         22 . A nozzle manufactured according to the method of  claim 19 . 
     
     
         23 . Method according to  claim 21 , wherein the jet director is within a supply channel leading to a discharge opening, the jet director having a free-flow cross-section in an area directly surrounding a central longitudinal axis of the supply channel, the filter having entrance slots upstream of the jet director and oriented radially relative to the central longitudinal axis, the filter further comprising a filter cap and a main filter part, the filter cap and the main filter part being interconnected by sintering. 
     
     
         24 . Method according to  claim 18 , wherein the step of die casting comprises die casting the mixture in molds to obtain casted mixtures in the shapes of a filter cap and a main filter part which defines a jet director, the step of forming comprises forming the filter cap and the main filter part as individual intermediate products following the step of removing the binder, the method further including assembling the individual intermediate products to one another and sintering the assembled intermediate products to one another to permanently interconnect the products to one another and form a combined jet director and filter product. 
     
     
         25 . Method according to  claim 24 , wherein the step of removing the binder from the casted mixtures yields porous intermediate products having gaps between individual powder particles, and said step of sintering permanently interconnects the intermediate products to one another and fills the gaps. 
     
     
         26 . Method according to  claim 18 , wherein the step of die casting comprises die casting the mixture in molds to obtain casted mixtures in the shapes of a filter cap, a main filter part which defines a jet director and a line part, the step of forming comprises forming the filter cap, the main filter part and the line part as individual intermediate products following the step of removing the binder, the method further including assembling the individual intermediate products to one another and sintering the assembled intermediate products to one another to permanently interconnect the products to one another and form a combined jet director and filter product. 
     
     
         27 . A method of manufacturing a nozzle comprising the steps of:
 mixing a metal powder with a binder to create a feedstock;   placing the feedstock into a casting mold;   casting the feedstock in the casting mold to create a plurality of first intermediate components;   removing the binder from the first intermediate components and thereafter assembling the first intermediate components to one another to create a second intermediate component; and   sintering the second intermediate component to create a one-piece, unitary nozzle.   
     
     
         28 . The method of  claim 27  wherein the step of removing the binder yields porous first intermediate components having gaps between individual powder particles, and the step of sintering permanently interconnects the first intermediate components of the second intermediate component to one another.