JPH05264A - Inner surface treatment device for cylindrical body - Google Patents

Abstract

(57) [Abstract] [Purpose] The treatment liquid does not substantially contact the outer surface of the tubular body (1) to be treated but only contacts a predetermined position on the inner surface of the tubular body (1) to be treated. The present invention provides an inner surface processing apparatus for a cylindrical body, which is capable of performing various kinds of processing. A device for treating the inner surface of a tubular body (1) to be treated with a liquid, wherein a partition plate (2) forms a partition space (3) in at least one of the upper and lower sides of the partition plate (2). A process that fits into the to-be-processed tubular body (1) and allows the processing liquid introduced from below to flow down through the gap between the through-hole (4) provided in the The liquid dispersion nozzle (5) is arranged substantially upright, and the treatment liquid dispersion nozzle is
The lower side of the partition plate (2) is relatively positioned in a state where the treatment liquid supply pipe (6) is connected and the tubular body (1) to be treated is fitted to the treatment liquid dispersion nozzle (5). It is characterized in that a means (7) capable of making a negative pressure is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for treating the inner surface of a tubular body with a liquid, and more specifically, the treatment liquid substantially contacts the outer surface of the tubular body to be treated. The present invention relates to an inner surface processing apparatus for a cylindrical body, which is capable of performing various kinds of processing without contacting only a predetermined position on the inner surface of the cylindrical body to be processed.

[0002]

2. Description of the Related Art Conventionally, for example, in the manufacturing process of an electrophotographic photosensitive member comprising an aluminum cylinder, which is provided with an anodized film on the outer surface thereof, is then subjected to a sealing treatment, and a photoconductive layer is provided thereon, The anodic oxide coating is formed on the inner and outer surfaces of the aluminum cylinder, and thereafter, the anodic oxide coating at predetermined positions on the inner surface is removed. The formation of the anodized film and the sealing treatment are usually carried out to improve the electrical characteristics of the electrophotographic photosensitive member, and the removal of the anodized film is carried out for electrical connection.

[0003]

In order to remove the above anodic oxide coating, it is preferable to dissolve and remove it using an appropriate liquid. Then, in this case, it is necessary to make the liquid contact only with a predetermined position on the inner surface without substantially contacting the outer surface of the aluminum cylinder. However,
Conventionally, a device which can be suitably used for such an application has not been proposed yet. The present invention has been made in view of the above circumstances, and an object thereof is to allow a treatment liquid to contact only a predetermined position on the inner surface of the tubular body without substantially contacting the outer surface of the tubular body. An object of the present invention is to provide an inner surface processing device for a cylindrical body made.

[0004]

That is, the gist of the present invention is an apparatus for treating the inner surface of a tubular body (1) to be treated with a liquid, and at least one of the upper and lower sides of a partition plate (2). A partition space (3) is formed in the partition wall, and a through hole (4) provided in the partition plate is provided with a processing liquid that is fitted into the processing target tubular body (1) and is introduced from below. A processing liquid dispersion nozzle (5) that can flow down through a gap between the processing liquid cylinder and the processing liquid distribution nozzle is connected to a processing liquid supply pipe line (6). Processing cylinder (1)
In a state in which is fitted to the treatment liquid dispersion nozzle (5),
The present invention resides in an inner surface processing apparatus for a cylindrical body, characterized in that means (7) for making the lower side of the partition plate (2) relatively negative pressure is provided.

[0005]

The negative pressure means (7) is the processing liquid dispersion nozzle (5).
This prevents the processing liquid flowing down through the gap between the processing target tubular body (1) and the processing liquid from flowing around the outer surface of the processing target tubular body (1).

[0006]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a side view showing the entire example of the inner surface processing apparatus of the present invention, and FIG. 2 is a side view showing the main part thereof.
The inner surface treatment apparatus shown in FIGS. 1 and 2 has partition spaces (3) and (3) both above and below a horizontally arranged partition plate (2).
Is formed. And the tubular body for processing (1)
Is an example of using a cylindrical body with both ends open.

An opening lid (8) for loading the tubular body (1) to be processed is provided on the top plate of the upper partitioned space (3),
The partition plate (2) is provided with a through hole (4) at a position corresponding to directly below the opening lid (8).

A pedestal (9) is preferably arranged at the peripheral portion of the through hole (4). The cradle (9) is
A through hole (11) having a descending inclined surface (10) toward the center and coaxial with the through hole (4) is provided. And
The descending inclined surface (10) and the through hole (11) form a funnel structure. According to the pedestal (9) having such a funnel structure, it is possible to more reliably prevent the processing liquid from flowing around to the outer surface of the to-be-processed tubular body (1) due to the negative pressure action described later.

In the through hole (4), a treatment liquid dispersion nozzle (5) is arranged substantially upright, and the treatment liquid dispersion nozzle is fitted into the to-be-processed tubular body (1) and is arranged from below. It has a structure that allows the introduced treatment liquid to flow down through a gap between the treatment liquid and the tubular body to be treated. The processing liquid dispersion nozzle (5) shown in FIG. 2 includes a cylindrical body (12) fitted into the processing liquid supply pipe (6) and a conical body (13) fixedly provided with a fixed gap above the cylindrical body (12). ) And. Then, the processing liquid introduced from the processing liquid supply pipe (6) is conical (13).
It is distributed horizontally by hitting the lower part of the
It flows down through the gap between the cylindrical body (12) and the tubular body (1) to be treated.

The size of the gap between the cylindrical body (12) and the cylindrical body to be treated (1) depends on the viscosity of the treatment liquid used, the degree of negative pressure action (pressure reduction degree), the supply amount of the treatment liquid, etc. Although it varies depending on the type, usually, it is appropriately selected from the range of about 0.5 to 5 mm. Then, in the gap portion, a plurality of cylindrical bodies (12) having different outer diameters are prepared, and the cylindrical body (1) having an appropriate outer diameter is prepared.
It can be adjusted freely by changing to 2).

The processing liquid supply line (6) is provided with a fixed base (1).
It is fixed substantially upright at 4) and is connected to the pump (15).

The lower compartment space (3) has a scrubber (1
6), and the upper part of the scrubber is connected to an exhaust blower (7) as a negative pressure means. The waste liquid in the scrubber (16) is extracted from the outlet pipe (17) and appropriately circulated and used.

The tubular body (1) to be treated is loaded with the opening lid (8) opened, fitted into the treatment liquid dispersion nozzle (5), and the opening end portion thereof is penetrated into the through hole (4). And is arranged substantially upright. Then, the open end of the tubular body (1) for processing is brought into contact with the descending inclined surface (10) of the pedestal (9). In this case, the descending inclined surface (10) exerts the centripetal effect between the to-be-processed tubular body (1) and the treatment liquid dispersion nozzle (5) due to the inverted conical inclined surface, and by this action, The gap between the two is kept constant.

In the present invention, by driving the exhaust blower (7), the lower compartment space (3) is made to have a negative pressure, and the processing liquid supplied by the pump (15) through the processing liquid supply pipe (6). The liquid flows down through the gap between the processing liquid dispersion nozzle (5) and the to-be-processed tubular body (1). Now, due to the above-mentioned negative pressure action, the processing liquid is prevented from flowing around the outer surface of the cylindrical body (1) to be processed.

The state of the processing liquid flowing down is adjusted by controlling the degree of pressure reduction and the flow rate of the processing liquid. And
The degree of pressure reduction is performed by controlling the exhaust blower (7) and the like by the pressure signal from the pressure gauge (18), and the flow rate of the processing liquid is performed by controlling the pump (15) and the like. By setting the above conditions, it is possible to form a uniform flow-down state above the processing liquid dispersion nozzle (5) without raising the liquid level, and to perform processing only at a predetermined position on the inner surface of the tubular body (1) to be treated. The liquid can be contacted uniformly.

FIG. 3 is a result of an example showing a change in the state of the treatment liquid. The apparatus shown in FIGS. 1 and 2 (the gap between the treatment liquid dispersion nozzle (5) and the tubular body (1) to be treated). Is 1 mm
In the case of), a transparent acrylic material was used as the tubular body (1) to be treated, and water was used as the treatment liquid in order to visually observe the flow state of the liquid, and the degree of pressure reduction and the flow rate were changed. Is the result of measurement. In FIG. 3, the area (A) is
There is a rise in the liquid level above the treatment liquid dispersion nozzle (5) in the liquid level rise region, and (B) is a stable region that does not rise above the treatment liquid dispersion nozzle (5) and is uniform. In such a case, a simple flow-down state is formed, and in (C), the liquid flow-out occurrence region, and a uniform flow-down state is not formed.

In the above description, since it is sufficient that the lower side of the partition plate (2) can be relatively negatively pressured, the partition space (3) is formed only in the upper part of the partition plate (2). Pressurized gas may be introduced into the space.

The inner surface processing apparatus of the present invention can be suitably used, for example, in the method for producing an electrophotographic photosensitive member proposed by the present applicant as Japanese Patent Application No. 2-169540. That is, in the above manufacturing method, for example, an aqueous sodium hydroxide solution is brought into contact with a predetermined position on the inner surface of an aluminum cylinder provided with an anodized film to dissolve and remove the anodized film at that position to form a substrate for an electrophotographic photoreceptor. obtain. INDUSTRIAL APPLICABILITY The inner surface treatment apparatus of the present invention can be effectively used for dissolving and removing the above anodic oxide coating, as shown in the following application examples.

[0019]

[Application] Thickness of 6μ, sealed with nickel sulfate
m with sulfuric acid alumite coating, diameter 30 mm, length 2
An aluminum cylindrical substrate having a thickness of 60 mm and a wall thickness of 0.75 mm was used as the tubular body (1) to be treated. The cylindrical body (12) of the treatment liquid dispersion nozzle (5) has a gap of 1.0 mm from the cylindrical body (1) to be treated, and the cylindrical body (12) to be treated is arranged from the upper end of the cylindrical body (12). 1) Length to bottom is 70mm
I used the one. First, the above-mentioned to-be-processed tubular body (1)
Was placed upright on the descending slope (10) of the cradle (9). Next, by driving the exhaust blower (7), the decompression degree of the lower compartment space (3) was set to 35 mmH ₂ O, and a 10% sodium hydroxide aqueous solution at 60 ° C. was supplied to 3.0 from the supply pipe (6). The liquid was supplied at a flow rate of liter / minute for 20 seconds to flow out from the treatment liquid dispersion nozzle (5). Next, the tubular body (1) for treatment is taken out from the inner surface treatment apparatus, the whole is washed with water, immersed in a 3% sulfuric acid aqueous solution for 20 seconds, and further washed with water,
After immersing in 95 ° C. pure water for 40 seconds, it was pulled up at a speed of 10 mm / second and dried. When a continuity test was conducted on the portion where the alumite coating was removed, it was possible to conduct electricity without problems, and an aluminum cylindrical substrate that could be used for an electrophotographic photoreceptor was obtained.

[0020]

According to the present invention described above, the treatment liquid contacts only a predetermined position on the inner surface of the cylindrical body to be treated without substantially contacting the outer surface of the cylindrical body to be treated. There is provided an inner surface processing apparatus for a cylindrical body, which is capable of performing various kinds of processing. The apparatus of the present invention is useful in various fields including the manufacturing process of electrophotographic photoconductors, and the practical value of the present invention is great.

[Brief description of drawings]

FIG. 1 is a side view showing an entire example of an inner surface processing apparatus of the present invention.

FIG. 2 is a side view showing a main part of an example of the inner surface processing apparatus of the present invention.

FIG. 3 is a view showing the apparatus shown in FIGS. 1 and 2, in which a transparent acrylic material is used as the processing target tubular body (1), water is used as the processing liquid, and the degree of pressure reduction and the flow rate are changed. It is a result of an example showing the state change of the obtained supply treatment liquid, the region (A) is a liquid level rising region, (B) is a stable region, and (C) is a liquid breakage occurrence region.

[Explanation of symbols]

 (1): Cylindrical object to be treated (2): Partition plate (3): Partition space (4): Through hole (5): Treatment liquid dispersion nozzle (6): Treatment liquid supply conduit (7): Negative pressure means (exhaust blower)

Claims (1)

Claim: What is claimed is: 1. An apparatus for treating an inner surface of a tubular body (1) to be treated with a liquid, wherein a partition space (3) is provided on at least one of upper and lower sides of a partition plate (2). The through-hole (4) provided in the partition plate is provided with a processing liquid which is fitted to the tubular body (1) to be treated and which is introduced from below to the tubular body to be treated. A treatment liquid dispersion nozzle (5) that can flow down through the gap is arranged substantially upright, and the treatment liquid dispersion nozzle is
The lower side of the partition plate (2) is relatively positioned in a state where the processing liquid supply pipe (6) is connected and the tubular body (1) to be processed is fitted in the processing liquid dispersion nozzle (5). An inner surface treating apparatus for a cylindrical body, characterized in that means (7) for making a negative pressure is provided on the inside.