초록 ▼

A method for the uniform coating of honeycomb bodies with finely divided solid matter from a dispersion in an amount which is below that which arises during customary immersion. To this end, the honeycomb is flooded from below with dispersion, emptied after a dwell time and blown out. Filling time,

A method for the uniform coating of honeycomb bodies with finely divided solid matter from a dispersion in an amount which is below that which arises during customary immersion. To this end, the honeycomb is flooded from below with dispersion, emptied after a dwell time and blown out. Filling time, filling amount, dwell time emptying time as well as the time between emptying and blowing out are measured in such a manner that in order to increase the separated amount of solid matter, filling time, dwell time, pumping-out time and the time between emptying and blowing out are increased but the filling amount is reduced.

대표청구항 ▼

1. A method for uniformly coating a honeycomb body made of ceramic or metal with a coating dispersion material of a given constant density resulting in an amount of absorbed solid material which is below an amount which would result from equilibrium between the coating dispersion material and the ho

1. A method for uniformly coating a honeycomb body made of ceramic or metal with a coating dispersion material of a given constant density resulting in an amount of absorbed solid material which is below an amount which would result from equilibrium between the coating dispersion material and the honeycomb body, comprising: introducing the honeycomb body into an immersion chamber, wherein the immersion chamber conforms its shape to the honeycomb body and is provided in its interior with at least one inflatable sleeve; inflating the sleeve; pumping the dispersion material into the immersion chamber from below the honeycomb body; pumping out the dispersion material after a dwell time; deflating the sleeve; removing the honeycomb body from the immersion chamber; freeing the honeycomb body from excess dispersion material by blowing out or by removing the excess dispersion material by suction, whereby a filling time, a filling amount, the dwell time, a pumping out time and a time between pumping out and blowing out or suction are selected such that in order to raise the amount of absorbed solid material, at least one of the filling time, the dwell time, the pumping out time and the time between pumping out and blowing out or suction are increased or the filling amount is decreased. 2. The method according to claim 1, wherein the interior of the immersion chamber includes two inflatable sleeves. 3. The method according to claim 1, wherein the filling time is in the range of 3 to 10 seconds. 4. The method according to claim 1, wherein the dwell time is in the range of 0 to 2 seconds. 5. The method according to claim 1, wherein the pumping out time is in the range of 4 to 10 seconds. 6. The method according to claim 1, wherein the time between pumping out and blowing out or suctioning out is in the range of 1.5 to 8 seconds. 7. The method according to claim 1, wherein the blowing out time is in the range of 8 to 14 seconds. 8. The method according to claim 1, wherein the suction time is 16.5 seconds. 9. A method for coating an object with a coating dispersion material resulting in coating an amount of absorbed solid material which is below an amount which would result from equilibrium between the coating dispersion material and the object comprising: placing the object to be coated on a surface located at an upper position in an immersion chamber; moving the object to a lower position in the immersion chamber; inflating at least one inflatable sleeve; supplying the immersion chamber with a dispersion material for coating onto the object; waiting for a first filling time to expire; choking an output while continuing to supply dispersion material; waiting for a second filling time to expire, whereby the first filling time and the second filling time combine to give a total filling time; stopping the supply of dispersion material after a predetermined amount of dispersion material has been supplied; waiting for a dwell time to expire; deflating the inflatable sleeve; emptying the immersion chamber over an emptying time; and at a time after emptying, removing excess dispersion material from the object, whereby the total tilling time, the dwell time, the dispersion material amount, the emptying time, and the time between emptying and the removing of the excess dispersion material from the object are selected such that in order to raise an amount of coating material absorbed by the object, any one or more of the total filling time, the dwell time, the emptying time, and the time between emptying and the removed of the excess dispersion material are increased, or the dispersion material amount is decreased. 10. The method according to claim 9, wherein after the object is moved into the lower position in the immersion chamber, the object rests on a support piece at the lower position in the immersion chamber and the surface on which it is moved continues to be moved to a further lower position. 11. The method according to claim 9, wherein the immersion chamber includes an upper inflatable sleeve and a lower inflatable sleeve. 12. The method according to claim 11, wherein during the inflating step, both the upper and the lower inflatable sleeves are inflated. 13. The method according to claim 11, wherein during the deflation step, both the upper and lower sleeves are deflated prior to the beginning of the emptying step. 14. The method according to claim 13, wherein the emptying step takes place with the use of an emptying pump. 15. The method according to claim 13, wherein the emptying step includes the following steps: emptying a portion of the chamber during a first emptying time; inflating the lower inflatable sleeve; continue emptying for a second emptying time; deflating the lower inflatable sleeve; and inflating the upper inflatable sleeve. 16. The method according to claim 9, wherein before the removing step, the following additional steps are carried out: inflating the upper inflatable sleeve; and pushing the object through the upper inflatable sleeve to thereby wipe coating material off of the object. 17. The method according to claim 9, wherein the supplying sleeve is performed by activating a filling pump or by opening a filling valve. 18. The method according to claim 9, wherein the removing step is accomplished by blowing out the excess dispersion material or by suctioning out the excess dispersion material. 19. The method according to claim 9, wherein the total filling time is in the range of 3 to 10 seconds. 20. The method according to claim 9, wherein the dwell time is in the range of 0 to 2 seconds. 21. The method according to claim 9, wherein the emptying time is in the range of 4 to 10 seconds. 22. The method according to claim 9, wherein the time between the emptying step and the removing step is in the range of 1.5 to 8 seconds.