Relating to flow optimized washcoating
US-2018161806-A1 · Jun 14, 2018 · US
Apparatus and method for coating substrates with washcoats
US11420224B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11420224-B2 |
| Application number | US-202017247298-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 7, 2020 |
| Priority date | Dec 10, 2019 |
| Publication date | Aug 23, 2022 |
| Grant date | Aug 23, 2022 |
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Abstract
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An apparatus and method of coating a substrate with a washcoat comprising:engaging the substrate (110) with a headset (6) of a substrate coating apparatus (100) so as to locate an upper surface of the substrate below a washcoat showerhead of the substrate coating apparatus;arranging a partition (200) between the washcoat showerhead and the upper surface of the substrate, the partition comprising a plurality of holes (202) and being located in the headset to maintain a first gap between a lower face (203) of the partition and the upper surface of the substrate;discharging a washcoat out of the washcoat showerhead onto an upper face (204) of the partition; andpassing the washcoat through the holes (202) in the partition, onto the upper surface of the substrate and into the substrate, at least in part by applying a suction force to a lower surface of the substrate.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method of coating a substrate with a washcoat, wherein the method comprises the steps of: engaging the substrate with a headset of a substrate coating apparatus so as to locate an upper surface of the substrate below a washcoat showerhead of the substrate coating apparatus; arranging a partition between the washcoat showerhead and the upper surface of the substrate, the partition comprising a plurality of holes and being located in the headset to maintain a first gap between a lower face of the partition and the upper surface of the substrate; discharging a washcoat out of the washcoat showerhead onto an upper face of the partition; and passing the washcoat through the holes in the partition, onto the upper surface of the substrate and into the substrate, at least in part by applying a suction force to a lower surface of the substrate. 2. The method of claim 1 , wherein the partition is arranged in a fixed relationship in the headset. 3. The method of claim 1 , wherein the first gap is between 2 and 7 mm. 4. The method of claim 1 , wherein the partition is disc-shaped and has a thickness between its upper face and its lower face of between 5 and 15 mm. 5. The method of claim 1 , wherein the partition is located in the headset to maintain a second gap between a lower face of the washcoat showerhead and the upper face of the partition of between 80 and 130 mm. 6. The method of claim 1 , wherein the percentage open area of the partition, defined as the percentage of the total area of the upper face of the partition that is comprised by the holes, is between 35 and 55%. 7. The method of claim 1 , wherein the upper surface of the substrate comprises a shaping, which extends to the sidewall of the substrate thereby defining a gap in the sidewall. 8. The method of claim 1 , wherein the partition is disc-shaped and has a thickness between its upper face and its lower face of between 7.5 and 12.5 mm. 9. The method of claim 1 , wherein the percentage open area of the partition, defined as the percentage of the total area of the upper face of the partition that is comprised by the holes, is between 40 and 50%. 10. The method of claim 1 , wherein the upper surface of the substrate comprises a groove or cut-out, which extends to the sidewall of the substrate thereby defining a gap in the sidewall.
Assignees
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Classifications
Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional [3D] monoliths · CPC title
characterised by the distribution of the catalytic coatings · CPC title
characterised by structure, by material or by manufacturing of catalyst support · CPC title
to internal surfaces, e.g. of tubes · CPC title
using vacuum · CPC title
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Frequently asked questions
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- What does patent US11420224B2 cover?
- An apparatus and method of coating a substrate with a washcoat comprising:engaging the substrate (110) with a headset (6) of a substrate coating apparatus (100) so as to locate an upper surface of the substrate below a washcoat showerhead of the substrate coating apparatus;arranging a partition (200) between the washcoat showerhead and the upper surface of the substrate, the partition comprisin…
- Who is the assignee on this patent?
- Johnson Matthey Plc
- What technology area does this patent fall under?
- Primary CPC classification B05C5/0225. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Aug 23 2022 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).