Coating method and device

A method for coating a substrate traversed from a first end face to a second end face by a multiplicity of channels with a substrate coating system,

• wherein the substrate coating system is a system for coating the substrate with liquid coating medium for the production of an exhaust gas purification catalyst, the substrate being a support body having the two end faces and an axial length L, the substrate coating system comprising:
• a chamber filled with a liquid and having a piston, wherein
• the liquid-filled chamber communicates with a tank, in the interior of which a displacement body is arranged in such a way that, when the piston is moved, the displacement body is moved proportionally by the liquid, and
• the tank communicates with a coating device for the substrate in such a way that, when the displacement body is moved proportionally by the liquid, the displacement body acts on a liquid coating medium in the tank to effect a proportional change in the level of the liquid coating medium in the coating device,
• wherein the coating device is configured to join with the substrate in such a way that the coating device is configured to deliver the liquid coating medium to multiple channels of the joined substrate simultaneously;
• wherein the method comprises:
• arranging the substrate on the coating device of the substrate coating system;
• initiating movement of the piston such that the liquid displaced by the piston moves the displacement body proportionally to the volume of liquid displaced;
• acting on the coating medium, with the displacement body, so as to move a volume of coating medium proportional to the movement of the displacement body and to achieve a corresponding rise in the level of coating medium in the coating device;
• penetrating the coating medium into the channels of the substrate up to a desired filling level or coated length of the channels proportionally to the displaced volume of coating medium;
• removing a volume of the coating medium from the channels of the substrate, with a coating forming in the channels.

A method for coating a substrate traversed from a first end face to a second end face by a multiplicity of channels with a substrate coating system,

• wherein the substrate coating system is a system for coating the substrate with liquid coating medium for the production of an exhaust gas purification catalyst, the substrate being a support body having the two end faces and an axial length L, the substrate coating system comprising:
• a chamber filled with a liquid and having a piston, wherein
• the liquid-filled chamber communicates with a tank, in the interior of which a displacement body is arranged in such a way that, when the piston is moved, the displacement body is moved proportionally by the liquid, and
• the tank communicates with a coating device for the substrate in such a way that, when the displacement body is moved proportionally by the liquid, the displacement body acts on a liquid coating medium in the tank to effect a proportional change in the level of the liquid coating medium in the coating device,
• wherein the coating device is configured to loin with the substrate in such a way that the coating device is configured to deliver the liquid coating medium to multiple channels of the joined substrate simultaneously;
• wherein the method comprises:
• arranging the substrate on the coating device of the substrate coating system;
• initiating movement of the piston such that the liquid displaced by the piston moves the displacement body proportionally to the volume of liquid displaced;
• acting on the coating medium, with the displacement body, so as to move a volume of coating medium proportional to the movement of the displacement body, and to achieve a corresponding rise in the level of coating medium in the coating device up to a first level of coating medium;
• detecting attainment of the first level of coating medium;
• renewing initiation or continuing movement of the piston, such that the liquid displaced by the piston moves the displacement body proportionally to the volume of liquid displaced;
• acting on the coating medium, with the displacement body, so as to move a volume of coating medium proportional to the movement of the displacement body, and to achieve a corresponding rise in the level of coating medium in the coating device up to a second level of coating medium such that the coating medium penetrates into the channels of the substrate up to a filling level or coated length of the channels proportionally to the displaced volume of coating medium;
• removing a volume of the coating medium from the channels of the substrate, with a coating forming in the channels.

A method for the production of an exhaust gas filter for a motor vehicle through use of a substrate coating system,

• wherein the substrate coating system is a system for coating a substrate with liquid coating medium for the production of an exhaust gas purification catalyst, the substrate being a support body having two end faces and an axial length L, and being traversed from a first end face to a second end face by a multiplicity of channels, the substrate coating system comprising:
• a chamber filled with a liquid and having a piston, wherein
• the liquid-filled chamber communicates with a tank, in the interior of which a displacement body is arranged in such a way that, when the piston is moved, the displacement body is moved proportionally by the liquid, and
• the tank communicates with a coating device for the substrate in such a way that, when the displacement body is moved proportionally by the liquid, the displacement body acts on a liquid coating medium in the tank to effect a proportional change in the level of the liquid coating medium in the coating device,
• wherein the coating device is configured to join with the substrate in such a way that the coating device is configured to deliver the liquid coating medium to multiple channels of the joined substrate simultaneously;
• wherein the method comprises:
• coating the substrate with the substrate coating system.