Concept for monitoring the manufacture of objects consisting of multiple material layers
View Patent ↗The manufacture of an object consisting of multiple material layers successively built up one upon the other can be monitored in an advantageous manner in that after the application of a material layer, a height profile of a circumference of the object is established, such that after the application of each material layer, a comparison with a reference information can be used for evaluating whether the preceding production step delivered a result which enables to draw the conclusion of a faultless application of the material layer.
1. Method for monitoring a manufacture of an object, said object having a first material layer and a second material layer lying on top of the first material layer, comprising the following steps:
determining a height profile of the first material layer after applying the first material layer on a layer carrier;
comparing the height profile of the first material layer to a reference information;
in case that in the comparison step a first result is obtained indicating an intact application of the first layer, supplying release information, by which a release of the application of the second material layer onto the first material layer can be prompted;
in case that in the comparison step a second result is obtained indicating a faulty application of the first material layer, taking an error action;
the reference information comprises a desired height profile and the comparison effects the first result when the height profile deviates from the desired height profile by less than a predetermined tolerance threshold, and wherein the comparison otherwise obtains the second result;
when the first result has been obtained in the comparison step, the method includes performing an update step whereby a new desired height profile is formed as the reference information from a linear combination of the desired height profile and a desired thickness profile describing an ideal thickness course of the second material layer;
wherein the determination of a height profile of the second material layer after applying the second material layer on the first material layer; and
wherein the height profile of the applied second material layer is compared with the new desired height profile and, in case that in this comparison step a result is obtained indicating a faulty application of the second material layer, taking an error action.
2. Method according to claim 1 , in which the predetermined desired height profile is stored in a memory and is read out from the memory after the application of the first material layer.
3. Method according to claim 2 , which, when the first result had been obtained in the comparison step, includes an update step, wherein in the update step a new desired height profile is formed as the reference information from the linear combination of the desired height profile and a desired thickness profile describing an ideal thickness course of the second material layer.
4. Method according to claim 2 , which, when the first result had been obtained in the comparison step, includes an update step, wherein in the update step a new desired height profile is formed as the reference information from the linear combination of the height profile and a desired thickness profile describing an ideal thickness course of the second material layer.
5. Method according to any of the claims 1 , 2 , 3 , and 4 , in which the error action comprises marking the object as flawed.
6. Method according to any of the claims 1 , 2 , 3 , and 4 , in which the error action comprises preventing the application of the second material layer.
7. Method according to any of the claims 1 , 2 , 3 and 4 , wherein the object is a tire.
8. Computer program with a program code for performing the method for monitoring a manufacturing process according to claim 1 , when the program is running on a computer.