Method of making a composite mould tool and repairing method of a composite mould tool
A method of manufacturing, at least in part, a composite mould tool is described. At S 101 , the method comprises obtaining a mould tool precursor having a first face and a reverse second face, wherein the precursor comprises a first metal. At S 102 , the method comprises hermetically scaling the precursor by cold spraying a layer on the second face using particles comprising a second metal, wherein the respective coefficients of thermal expansion of the first metal and the second metal are within a factor of 5. At S 103 , the method comprises providing a faceplate of the composite mould tool by subtractive manufacturing of the first face.
1 . A method of manufacturing a composite mould tool, the method comprising:
obtaining a mould tool precursor having a first face and a reverse second face, wherein the precursor comprises and/or is a first metal, wherein the precursor comprises a perforation extending between the first face and the second face (S 101 );
hermetically sealing the precursor by cold spraying a layer on the second face using particles comprising and/or of a second metal, wherein the respective coefficients of thermal expansion of the first metal and the second metal are within a factor of 5, wherein the layer does not have any perforations therethrough and wherein the precursor is the mould tool before the layer is cold sprayed on the second face (S 102 ); and
providing a faceplate of the composite mould tool by subtractive manufacturing of the first face (S 103 );
thereby manufacturing the mould tool having the faceplate provided by subtractive manufacturing of the first face and the reverse second face hermetically sealed by cold spraying the layer thereon.
2 . The method according to claim 1 , wherein obtaining the precursor comprises casting, thermomechanically forming and/or fabricating from the first metal.
3 . The method according to claim 1 , wherein the first metal and/or the second metal is an Fe—Ni alloy.
4 . The method according to claim 1 , wherein the layer has a thickness in a range from 1 mm to 20 mm.
5 . The method according to claim 1 , wherein the respective coefficients of thermal expansion of the first metal and the second metal are within a factor of 2.
6 . The method according to claim 5 , wherein the second metal and the first metal are the same.
7 . The method according to claim 1 , comprising priming the second surface before cold spraying the layer thereon.
8 . The method according to claim 1 , wherein hermetically sealing the precursor by cold spraying the layer on the second face comprises selectively cold spraying the layer on the second face.
9 . The method according to claim 1 , wherein hermetically sealing the precursor by cold spraying the layer on the second face comprises cold spraying the layer on the entire area of the second face.
10 . The method according to claim 1 , comprising providing the faceplate of the composite mould tool by subtractive manufacturing of the first face before hermetically sealing the precursor by cold spraying the layer on the second face.
11 . The method according to claim 1 , comprising providing the faceplate of the composite mould tool by subtractive manufacturing of the first face after hermetically sealing the precursor by cold spraying the layer on the second face.
12 . The method according to claim 1 , comprising subtractive manufacturing of the layer on the second face.
13 . The method according to claim 1 , comprising stress-relieving the precursor having the layer on the second face before subtractive manufacturing of the first face.
14 . The method according to claim 1 , wherein the composite mould tool is for an aerospace component.
15 . A method of repairing a composite mould tool to be repaired according to claim 1 , wherein the precursor is the composite mould tool to be repaired.