Method of manufacturing a rocket combustion chamber
First Claim
1. A method for manufacturing the cooling wall of a rocket combustion chamber, comprising the steps of:
- making an inner cylinder of a metallic material formed with grooves in the exterior surface thereof;
filling up the grooves of said inner cylinder with a filler;
compression-molding an outer cylinder on the inner cylinder by uniformly compressing metallic material powder of a predetermined thickness against the entire outermost surface of the inner cylinder having its grooves filled up with the filler;
removing the filler from the grooves of said inner cylinder, whereby the grooves remain as empty cooling channels; and
sintering the compression-molded powder to join the sintered outer cylinder material to the inner cylinder material and to form integral inner and outer cylinders with cooling channels therebetween.
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Accused Products
Abstract
The present invention is directed particularly to an improved method usingowder metallurgy for the manufacture of the grooved cooling wall of a liquid-propellant rocket combustion chamber. The surface of an inner cylinder constituting the cooling wall is formed with cooling grooves, and these grooves are densely filled up with a filler such as paraffin wax. Thereafter, metal powder which will provide an outer cylinder is compression-molded to a predetermined thickness around the inner cylinder. This metal powder is the same material as the material of the inner cylinder. After the paraffin wax which is the filler is evaporated and removed, the compression-molded metal powder body is sintered in a furnace. During this sintering heat treatment, the inner and outer cylinders are rigidly joined together by the sintering reaction between the atoms of the inner cylinder and the atoms of the metal powder.
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Citations
9 Claims
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1. A method for manufacturing the cooling wall of a rocket combustion chamber, comprising the steps of:
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making an inner cylinder of a metallic material formed with grooves in the exterior surface thereof; filling up the grooves of said inner cylinder with a filler; compression-molding an outer cylinder on the inner cylinder by uniformly compressing metallic material powder of a predetermined thickness against the entire outermost surface of the inner cylinder having its grooves filled up with the filler; removing the filler from the grooves of said inner cylinder, whereby the grooves remain as empty cooling channels; and sintering the compression-molded powder to join the sintered outer cylinder material to the inner cylinder material and to form integral inner and outer cylinders with cooling channels therebetween. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification