Slurry applying device and device for inspecting defects of slurry application

Abstract

Problem to be solved is to provide a means to make the thickness of a ceramic slurry in a container uniformly in a process to form plugged portions in a honeycomb structure. The solution is provided with a slurry applying device 1 comprising a plate shaped container 2 which a base 21 is flat, a fixed quantity non-pulsatile pump 3 to which a slurry 31 is discharged to the base 21 of the container 2, a discharge opening moving means which relatively moves a position of a discharge opening of the pump 3 between center 22 and periphery 23 of the base 21 of the container 2, and a container rotating means for application which rotates the container 2 as a rotating axis with the center 22 of the base 21.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view showing one embodiment of a slurry applying device of the present invention.

FIG. 2 is a sectional view showing one embodiment of a slurry applying device of the present invention.

FIG. 3 is a top view showing one embodiment of a device for inspecting defects of a slurry application of the present invention.

FIG. 4 is a sectional view showing one embodiment of a device for inspecting defects of a slurry application of the present invention.

FIG. 5 is a figure showing one embodiment of a method for producing a plugged honeycomb structure of the present invention, and is a perspective view showing one example of a formed honeycomb body.

FIG. 6 is a figure showing one embodiment of a method for producing a plugged honeycomb structure of the present invention, and is a plane view showing an end surface of a formed honeycomb body.

FIG. 7 is a figure showing one embodiment of a method for producing a plugged honeycomb structure of the present invention, and is a sectional view which shows a state that an end surface of a formed honeycomb body is immersed into a slurry which is applied to a container.

FIG. 8 is a figure showing one embodiment of a method for producing a plugged honeycomb structure, and is a perspective view showing one example of a plugged honeycomb structure.

FIG. 9 is a figure showing one embodiment of a method for producing a plugged honeycomb structure, and is a sectional view which shows AA section in FIG. 8.

FIG. 10 is a sectional view of a device for inspecting defects of a slurry application of the present invention, (a) is a figure showing a state in case air bubble near a lateral lighting is not lighted up by the lateral lighting, and (b) is a figure showing a state in case air bubble moved in the distance from a lateral lighting is lighted up by the lateral lighting.

FIG. 11 is a sectional view of a slurry applying device to explain one embodiment of a method for applying a slurry of the present invention, (a) is a figure showing a state just after discharging a slurry, and (b) is a figure showing a state which a slurry comes to be flat.

FIG. 12 is a sectional view showing the other embodiment of a device for inspecting defects of a slurry application of the present invention.

Claims

1. A slurry applying device comprising a plate shaped container which a base is flat, a slurry discharge means to discharge a slurry to the base of the container, a container rotating means for application to rotate the container, and the displacement meter which measures the thickness of slurry discharged by the slurry discharge means.

2. A slurry applying device according to claim 1, further comprising a displacement meter moving means to move the displacement meter.

3. A slurry applying device according to claim 1, further comprising a control means A, regulating more than any one of the discharge volume of a slurry of the slurry discharge means and the rotating rate of the container rotating means for application based on data of the thickness of the slurry measured by the displacement meter, together with inputting the thickness.

4. A slurry applying device according to claim 1, further comprising a discharge opening moving means which relatively moves a position of a discharge opening of the slurry discharge means between center and periphery of the base of the container.

5. A slurry applying device according to claim 4, further comprising a control means B, regulating moving rate of the discharge opening moving means based on data of the thickness of the slurry, together with inputting the thickness of the slurry measured by the displacement meter.

6. A slurry applying device according to claim 1, the displacement meter is a laser displacement meter.

7. A method for applying a slurry to a base of the plate shaped container which the base is flat, in which the method comprises measuring the thickness of the slurry discharged together with discharging the slurry to the base of the container while rotating the container by using a slurry discharge means, and regulating more than any one of the discharging volume of the slurry and the rotating rate of the container based on the thickness of the slurry measured.

8. A method for applying a slurry according to claim 7, regulating the moving rate of a discharge opening based on the thickness of the slurry measured together with relatively moving a position of the discharge opening of the slurry discharge means between center and periphery of the base of the container.

9. A method for manufacturing a plugged honeycomb structure comprising a process which includes manufacturing a formed honeycomb body having a plurality of cells which penetrate in axial direction divided by porous partition walls, conducting a mask only cells which are not plugged in the plurality of cells being opened in an end surface of the formed honeycomb structure with pasting a film, applying a slurry to a base of a plate shaped container which the base is flat by measuring the thickness of the slurry discharged together with discharging the slurry to the base of the container while rotating the container by using a slurry discharge means and regulating more than any one of the discharging volume of the slurry and the rotating rate of the container based on the thickness of the slurry measured using the slurry consisting of a ceramic material, and firing the formed honeycomb body after an end surface of the formed honeycomb body masked only the cells without plugging is immersed in a slurry applied to the container to plug by a slurry consisting of a ceramic material.

10. A device for inspecting defects of a slurry application comprising a plate shaped container which a base is flat and a slurry is applied to the base, a camera which images the slurry applied to the base, located above the base of the container, and an upward lighting which lights the slurry applied to the base from upward, located similarly above the base of the container.

11. A device for inspecting defects of a slurry application comprising a plate shaped container which a base is flat and a slurry is applied to the base, and a laser line sensor which images the slurry applied to the base, located above the base of the container.

12. A device for inspecting defects of a slurry application according to claim 10, further comprising a camera position moving means which relatively moves a position of the camera between center and periphery of the base of the container.

13. A device for inspecting defects of a slurry application according to claim 10, further comprising an upward lighting position moving means which relatively moves a position of the upward lighting between center and periphery of the base of the container.

14. A device for inspecting defects of a slurry application according to claim 10, further comprising a lateral lighting which lights slurry applied to the base from lateral, located in a lateral of a base of the container.

15. A device for inspecting defects of a slurry application according to claim 11, further comprising a lateral lighting which lights slurry applied to the base from lateral, located in a lateral of a base of the container.

16. A device for inspecting defects of a slurry application according to claim 14, further comprising a lateral lighting position moving means which relatively moves a position of the lateral lighting along periphery of the container.

17. A device for inspecting defects of a slurry application according to claim 15, further comprising a lateral lighting position moving means which relatively moves a position of the lateral lighting along periphery of the container.

18. A device for inspecting defects of a slurry application according to claim 10, further comprising a container rotating means for inspection to rotate the container as a rotating axis with center of the base.

19. A device for inspecting defects of a slurry application according to claim 11, further comprising a container rotating means for inspection to rotate the container as a rotating axis with center of the base.

20. A method for inspecting defects of slurry applied to a base of a plate shaped container which the base is flat, in which the method is a method for inspecting defects of a slurry application and comprises lighting slurry applied to the base of the container from upward and lateral of the base of the container, and inspecting defects of application by means of taken images by a camera from upward of the base of the container.

21. A method for manufacturing a plugged honeycomb structure comprising a process which includes manufacturing a formed honeycomb body having a plurality of cells which penetrate in axial direction divided by porous partition walls, conducting a mask only cells which are not plugged in the plurality of cells and are opened in an end surface of the formed honeycomb structure with pasting a film, applying a slurry to a base of a plate shaped container which the base is flat by using the slurry consisting of a ceramic material, inspecting defects of application of the slurry applied to the base of the container by lighting slurry applied to the base of the container from upward and lateral of the base of the container and inspecting defects of application by means of taken images by a camera from upward of the base of the container, and firing the formed honeycomb body after an end surface of the formed honeycomb body masked only the cells which are not plugged is immersed in the slurry applied to the container to plug by a slurry consisting of a ceramic material when the defects are not detected in the slurry applied to the container.