Method for determining the polyester fraction of a multi-component powder during a thermal spraying process, method for coating or touching up an object by means of a thermal spraying process and thermal spraying device

A method for determining a polyester fraction in a multi-component powder during a thermal spraying process, comprising the steps of heating and feeding the multi-component powder to an object with aid of a carrier, forming a coating on the object, and measuring a first value for an intensity of light emitted by the carrier and measuring a second value for an intensity of light emitted by a combination of the carrier and the multi-component powder, deriving a characteristic value from a comparison using the first and second measured values, and determining a fraction of polyester in the multi-component powder on a basis of a previously determined relationship between the characteristic value and the polyester fraction.

A method for coating or touching up an object by a thermal spraying process, wherein the process includes the method of claim 19 and further comprises, during the thermal spraying process, the fraction of polyester is determined multiple times or constantly, and regulated to a predetermined value or range of values.

A device for a thermal spraying process, comprising a first feed device for a first ingredient of a multi-component powder and a second feed device for a second ingredient of the multi-component powder, wherein the ingredients fed from the two feed devices are mixed at a location of the device such that the ingredients from the two feed devices mix when the device is in operation and before the multi-component powder impacts an object to be coated by a thermal spraying process.