Coating method and device for size coating of microporous honeycomb ceramic carrier with openings at two ends

Abstract

The invention discloses a coating method and device for a size coating of a microporous honeycomb ceramic carrier with openings at two ends. The honeycomb ceramic carrier with a plurality of microporous channels is arranged on a lower tool, the honeycomb ceramic carrier is located, clamped and sealed by an upper tool and the lower tool, the size to be applied is accurately and quantitatively conveyed to the upper end face of the microporous honeycomb ceramic carrier by utilizing an automatically accurate feeding system, and the size stays on the whole upper end face in a covering mode and is evenly distributed. By means of a negative pressure method, the size evenly distributed on the upper end face of the carrier is evenly conveyed to the inner surfaces of small hole channels of the honeycomb ceramic carrier through the pipeline system, and the inner surfaces are coated with the size to form through holes, so that the size on the surfaces of the small hole channels of the carrier is evenly distributed, and the surfaces are quantitatively coated with the size.

Description

technical field [0001] The invention relates to a catalyst ceramic carrier for purifying automobile exhaust gas, in particular to a method for coating a slurry coating of a microporous honeycomb ceramic carrier with open ends and a device for implementing the method. Background technique [0002] For ease of description, the present invention is illustrated by taking the exhaust catalyst for automobiles as an example. In the catalyst for automobiles, this product belongs to auto parts, and the main car factory has very high requirements for the consistency of auto parts. Cost control is stricter. At present, some domestic manufacturers of automobile exhaust purification catalysts use manual methods to manufacture, that is, the carrier is immersed in the slurry, and after a period of time, the honeycomb ceramic carrier is taken out, and then the holes are blown by a manual compressed air spray gun. The problems with this method are: , it is difficult to control the amount of...

AI Technical Summary

Problems solved by technology

At present, some domestic manufacturers of automobile exhaust purification catalysts use manual methods to manufacture, that is, the carrier is immersed in the slurry, and after a period of time, the honeycomb ceramic carrier is taken out, and then the holes are blown by a manual compressed air spray gun. The problems with this method are: , it is difficult to control the amount of coating. The slurry coated on the outer surface of the carrier needs to be cleaned manually and causes a waste of slurry raw materials. The products manufactured by this coating method have poor product quality consistency and are difficult to quantify , Uniform load, the cost is difficult to control

[0003] 1. If the water absorption rate of the honeycomb ceramic carrier is different (such as choosing a low-cost domestic carrier), it is difficult to achieve accurate quantitative coating;

[0004] 2. Because the slurry needs to be recycled in this method, the slurry will change during the process, and the changed slurry needs to be adjusted. If there is no good slurry detection instrument and effective adjustment means, the changed slurry cannot be adjusted back, which will cause production problems. The process is unstable and may even affect product performance;

[0005] 3. This method requires a lot of precious metal slurry to be turned around and the loss of the precious metal slurry is large when cleaning the equipment. Because of the expensive precious metal contained in the slurry, there is a large backlog of funds and the cost is difficult to control;

[0006] 4. Compared with the present invention, this method cannot be well adapted to the production of small batches and many varieties

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