JPH0474570A - Production of cylindrical coating body - Google Patents

Abstract

PURPOSE:To form a smooth coating surface having high configurational accuracy by using one nozzle or two or more nozzles successively coating a narrow part to form a film using an apparatus having a measuring terminal measuring the positional deviation of the surface of a substrate, a calculator and a flow rate control apparatus. CONSTITUTION:A nozzle head having one nozzle or two or more nozzles 2 discharging a coating solution 3 in specific coating width is moved in parallel to a rotary axial line to form the coating film continuously developed on the surface of a cylindrical substrate 1. A coating apparatus is provided with a calculator 9, a flow rate control apparatus 4 and a positional deviation measuring apparatus 8. The measuring terminal of the deviation measuring apparatus 8 measures the deviation from the set position in the nozzle non-arrival region of the surface of the substrate 1 to input the measured value to the calculator 9. The calculator 9 calculates the discharge amount of the coating solution corresponding to the deviation and issues the flow rate data corresponding to the calculated value to the apparatus 4. The apparatus 4 controls the amount of the coating solution corresponding to the flow rate data and allows the nozzle to discharge the coating solution when the nozzle reaches a region to be measured.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a method for manufacturing a cylindrical coated body in which a coated film is formed on the surface of a cylindrical substrate that is an object to be coated. In photoconductor drums for photography, etc., the dimensional accuracy and processing degree of the photoconductor drum, which is a cylindrical base, is low, and the outer surface shape is uneven, that is, the base surface has positional deviations in parts of the outer surface. , relates to a method for manufacturing a cylindrical coated body in which the accuracy of the cylindrical shape is improved and a smooth coated body surface is formed by adjusting the amount of the coating liquid to be applied according to the unevenness of the base surface. be.

[Prior Art] Conventionally, methods for forming a cylindrical coating body in a continuous film form on the surface of a cylindrical substrate, which is an object to be coated, have generally been as follows: a) Various means are known, such as a dip coating method, b) a ring coating method, C) a spray coating method, and d) a spiral coating method.

However, each of these conventionally used application means usually has the following disadvantages. That is, a) Dip coating method; After immersing the cylindrical substrate in a coating liquid tank, when the cylindrical substrate is pulled up, the coating liquid drips on the surface of the coating film, and the concentration of the coating liquid in the liquid tank increases. It tends to cause unevenness, which makes it difficult to maintain a constant coating film thickness, and a large amount of coating solution is required; b) Ring coating method; easy to cause coating streaks on the coating surface; C) Spraying Application method: The coating efficiency of the coating solution is low, resulting in waste of the coating solution, and the surface condition of the coating film is poor. d) Spiral coating method: Spiral-like film thickness unevenness is likely to occur on the coating surface. etc.

However, on the other hand, the spiral coating method has the disadvantage that it tends to cause spiral thickness unevenness on the coating surface, but on the other hand, the required amount of coating liquid is small, and the coating device itself is also compared. It has the advantage of being simple and easy to use, and is therefore a very preferable method.

Therefore, we first applied the spiral coating method,
We proposed a coating method that uses a coating multi-nozzle body with multiple discharge pores arranged in a special shape to discharge the supplied coating liquid in a specific coating width, overcoming the difficulties of the spiral coating method. As a result, we succeeded in forming a continuous, uniform, and highly accurate coating film on the surface of the substrate.

On the other hand, these cylindrical substrates are required to have very smooth surfaces and strict shape accuracy for industrial use, for example, as photosensitive drum substrates for electrophotography.

Therefore, conventionally, in order to manufacture this type of cylindrical substrate, for example, a photoreceptor drum substrate for electrophotography, an extruded tube from an aluminum villet is used as a starting material, and after drawing it one to three times, Cutting, rough cleaning, and re-stamping,
It is common to use processes such as chamfering, rough cutting, and mirror cutting. In this way, a drum base having a precision that can be used as a photosensitive drum is manufactured from a material with a rough surface by repeating many steps, and in some cases, one step.

[Problem to be solved by the invention]

These cylindrical coated bodies, including photosensitive drums for electrophotography, have been increasingly used in recent years, and therefore there is a need for mass production in as short a time as possible, simply and at low cost.

However, the conventional coated body manufacturing method has various problems such as the substrate processing steps leading to the coating process are complicated and long, and the thickness of the substrate is reduced during the processing process. ing.

In addition, with coating methods such as dip coating and spray coating that have been conventionally applied to photoreceptor drum manufacturing, the entire film is formed at once, and the film thickness cannot be controlled depending on the location. That is, even if coating was attempted on a substrate with poor precision, it was difficult to create a smooth coating surface with high shape precision.

[Means to solve the problem]

As a result of intensive study to solve the above problems, the inventors of the present invention found that
Applying a spiral coating method with one or more nozzles that sequentially coat narrow areas to form a coating film, the amount of coating liquid is adjusted and applied according to the positional deviation of the surface area on the substrate. By doing so, it was discovered that a smooth coated surface with high shape accuracy could be formed even on the surface of a substrate with a low degree of processing, and the present invention was achieved.

That is, the present invention rotates a horizontally held cylindrical base, and at the same time rotates a nozzle head equipped with one or more nozzles for discharging the supplied coating liquid in a specific coating width in parallel to the axis of rotation. A method for manufacturing a coated body in which a coating film is continuously spread on the surface of a substrate by moving the coated body, the coating device comprising a computer, a flow rate adjustment device, and a position deviation measuring device, and a measuring terminal of the position deviation measuring device. measures the deviation from the set position at the part of the basic surface that the nozzle has not reached, inputs the measured value into a computer, and the computer calculates the amount of coating liquid to be discharged according to the deviation, and the amount corresponds to the calculated value. commanding the flow rate information to a flow rate adjustment device, the flow rate adjustment device adjusting the liquid amount corresponding to the flow rate information;
This is achieved by a coating body manufacturing method characterized in that the adjusted amount of coating liquid is discharged from a nozzle when the nozzle reaches the measurement target site.

The present invention will be explained in detail below.

In the present invention, by moving the discharge nozzle in a direction parallel to the axis of rotation while rotating the cylindrical substrate, which is the object to be coated, the discharge nozzle is applied to the surface of the cylindrical substrate to be coated. A spiral coating method is adopted in which the coating liquid discharged from the discharge nozzle is spread out and coated on the surface to be coated by taking a relative spiral trajectory. In this case, during one rotation of the cylindrical substrate, the discharge nozzle is moved by an amount approximately equivalent to the coating width, thereby hardly causing overcoating or uncoating of the coating film.

In addition, when using multiple nozzles, the opening cross-sectional area of each nozzle and the distance between each opening should be determined based on the surface tension and viscosity of the coating liquid used, the drum surface, and the coating liquid to be discharged. It is important to make appropriate selections in accordance with each coating condition, such as the contact angle of the coating and the thickness of the coating film to be spread and coated.

In other words, the opening cross-sectional area of each nozzle is selected and set depending on the viscosity and flow rate of the coating liquid, and if this opening cross-sectional area is too small, the pressure loss at each nozzle will increase (
If the opening cross-sectional area is too large, the flow rate at each nozzle will vary, which is not preferable. In addition, the distance between the opening of each nozzle and the drum surface should be such that the coating liquid to be discharged can be leveled after adhering to the drum surface, and if the flow velocity during discharge is high, the distance may be 5 mm or more. A continuous film with sufficiently uniform thickness can be formed, but when the flow rate is low, it may be necessary to approach them to within 0.1 mm. Depending on surface tension, viscosity, flow rate, etc.
A prerequisite for good coating is to select a material that can form the coating film most effectively.

On the other hand, if the coating conditions at this time are not appropriate and the contact angle between the drum surface and the discharged coating liquid is large, or if the viscosity of the coating liquid itself is relatively high, the coating liquid may not spread. This results in a streak-like appearance and a commensurate streak-like uncoated area. In this case, for example, even if you try to narrow the distance between the openings of each nozzle, there will be restrictions in terms of structure and size, and the coating liquid flowing out from multiple nozzles will not reach the substrate. By the time they reach the top, they may coalesce and cause uneven coating. Also, there is a limit to lowering the viscosity of the coating liquid.
If the viscosity is lowered too much, the wet film thickness will become abnormally thin, resulting in undulation.

Therefore, as a means to deal with such cases,
While each nozzle opening is arranged in one direction, it is tilted by a predetermined angle θ in the direction of movement of the nozzle head, so that the arrangement is substantially the same as that in which the interval between each discharge opening is reduced. I can do it.

In this case, the film parts that are applied later are sequentially fused with the film parts that were applied earlier, and as a result, a coating film of uniform thickness and a continuous film shape is formed as desired. It is possible. The inclination angle θ in this case is adjusted by considering various conditions such as the surface tension and viscosity of the coating liquid, and the contact angle between the drum surface and the discharged coating liquid, but in many cases, It is preferable to set the angle to about 15 to 75 degrees in order to obtain a coating film with a uniform thickness.

The cross-sectional shape of the opening of the nozzle is generally circular, but it is also possible to select and use a nozzle with a rectangular or band-shaped cross-section as long as it satisfies the above-mentioned cross-sectional area condition.

The driving means for rotating the photoreceptor drum and moving the coating nozzle head in the method for producing a coated body of the present invention need to be related to each other in order to enable accurate movement in a predetermined relative spiral trajectory. For example,
It is desirable to use a controllable drive source such as a stepping motor or a servo motor, and the moving means usually employs a pole screw mechanism suitable for smooth movement. The rotational speed of these photosensitive drums and the moving speed of the coating nozzle head are both set constant during the coating operation.

The flow rate regulating device in the present invention is preferably one that can accurately control the flow rate of the coating liquid, and a plunger type pump that drives a piston rod using a controllable drive source such as a stepping motor is preferable. Listed as a representative.

Basically, the calculator in the present invention only needs to have the function of converting an input measurement value into a flow rate value and issuing a flow rate command immediately or in accordance with a predetermined time difference. However, the faster the information processing speed, the better, and in order to visually confirm the shape accuracy of the substrate surface, it is also preferable to use a calculator with a function that can display developed contour lines based on measured values.

As the position deviation measuring device in the present invention, any known device may be used as long as it can automatically and continuously measure the deviation of the surface of the base portion from the standard or set position at the position of the measurement terminal. For example, a capacitive method that measures the thickness of the air layer between the measurement terminal and the substrate held at a constant tree level, or a method that irradiates a laser, reflects it from the substrate, and measures the distance between the substrate and the substrate from the receiving position of the reflected light. Examples include a laser displacement meter that measures the distance to a terminal.By scanning such a position deviation measuring device or at least its measurement terminal over a rotating base, it is possible to measure the entire circumference of the base.
Can measure true length, roundness, rotational runout, etc. over the entire length. In order to eliminate measurement errors due to mismatch between the center of rotation and the center of the substrate, use a pair of measurement terminals set 180 degrees apart, measure the same location with both measurement terminals, and calculate the value. It is sufficient to use the average value.

The measurement terminal and nozzle may be fixed on the same head, and the measurement terminal may be in a position preceding the nozzle, as long as the structure allows the nozzle to reach the part to be measured by the measurement terminal. , may exist independently. For more accurate position deviation measurement, several measurement terminals may be used.

The cylindrical substrate used in the present invention is not only a photosensitive drum substrate for electrophotography, but also a substrate that has a substantially cylindrical shape and whose positional deviation from a perfect cylindrical shape can be corrected with precision. , its use is not limited.

The positional deviation of aluminum drawn tubes and extruded tubes, which are generally used as starting materials for drum substrates for electrophotographic photoreceptors, is not so extreme; for example, in terms of straightness, the length is 50 I
The circularity is less than 50 μ per 111, and the circularity is less than 50 μ per 50 nwn of circumference, and this degree of positional deviation is within the range that can be corrected by adjusting the flow rate of the coating liquid of the present invention.

Furthermore, we also offer non-aluminum glass tubes, resin pipes, etc.
Conventionally, the positional deviation could not be used as a photoreceptor drum substrate for electrophotography as it is, but by applying the coating method based on the present invention, the outer diameter tolerance, cylindricity, etc. can be corrected to within the usable positional deviation range. be able to. In addition, the present invention can apply the coating while correcting the shape using the coating method of the present invention, regardless of the previous history, such as those that have undergone some kind of surface treatment or have already been coated with at least one undercoat. Widely applied when applying layers.

As the coating liquid used in the present invention, any substance required for the coating body can be used, but in that case, as described above, each device should be arranged in accordance with the surface tension and viscosity of the coating liquid. There must be.

In addition, even if it is possible to create a smooth surface with no unevenness in the wet state immediately after coating, if the film thickness decreases in the concave areas where the thick coating is applied is greater than the convex areas where the coating is thin, the film will dry out. When it is removed, a loose recess may be formed again. Therefore,
In order to enhance the accuracy correction effect, the volume reduction rate of the coating liquid during the process of drying and fixing the film should be 40% or less, preferably 30% or less.
% or less. Examples of such coating liquids include ultraviolet curing type, electron beam curing type, thermosetting type, and paints containing a small amount of solvent.

Details of the coating operation of the present invention will be described below. An example of the overall device and each component used in the present invention is shown in FIG. In the figure, an example is shown in which the center of the nozzle (2) and the measurement terminal (not shown) of the position deviation measuring device (8) or the measurement point on the base are lined up on the same wire on the axis of the base, but each I don't mind being independent.

First, a pair of flanges are fitted onto the base (1) and attached to a rotating shaft installed horizontally.

The head, in which the nozzle (2) and the positional deviation measuring device (8) are attached as one body, is moved to the origin position on the left side. According to a pre-programmed schedule, the drum rotation motor (5) rotates first, then the nozzle feed motor (6).
rotates and moves the head to the right. The motor (6) rotates at a constant speed according to the pitch and reduction ratio determined from the base rotation speed and the coating process when passing through the nozzle, and moves the head to the right at a constant speed. When the measurement terminal reaches the left end of the base, position deviation measurement begins. Note that the flow rate adjustment device (
4) can be stopped, the computer can output only the position deviation measurement results, and this can be displayed as a developed diagram.

The measured values are first stored in a calculator (9). Here, in order to eliminate errors due to abnormal measurements, three measurement points were added before and after.
It is preferable to use the average value of the points, or to use three measurement terminals and use a three-point method to obtain the positional deviation measurement value of the part to be measured.

The calculator calculates in advance the time it takes for the nozzle to reach the area to be measured from the distance between the center of the nozzle and the measurement terminal and the moving speed of the nozzle head, and calculates the flow rate of the coating liquid corresponding to the time and the measured value. Send commands to the flow rate adjustment device, taking into account the distance between the flow rate adjustment device and the nozzle and the time delay based on the characteristics of the flow rate adjustment device, so that the time from passing through the sieving device to being discharged from the nozzle is the same. .

Upon receiving the command, the flow rate adjustment device accurately controls the flow rate of the coating liquid fed from the coating liquid holder to the nozzle, and the adjusted coating liquid is discharged from one or several nozzles to the target area to be measured. .

In this way, while measuring the positional deviation, the nozzle head moves on the rotating base from one end to the other end while changing the discharge flow rate from the nozzle.

Of course, instead of measuring the positional deviation and applying the coating in one step of moving the nozzle head, it is also possible to perform the measurement in two or more steps, such as measuring the positional deviation and then moving the nozzle head in the opposite direction to perform the coating operation.

When the nozzle reaches the end, the flow regulator stops operating.

Of course, in this case, a method can also be adopted in which a three-way valve is provided and the flow path is switched to continue operation.

After coating, while the substrate continues to rotate, the substrate/rotation system is moved, for example, on a guide rail, and guided to a curing device (not shown in FIG. 1). After curing, the substrate may be returned to the coating machine and only measured by a position deviation measuring device to examine the accuracy correction effect.

In the case of electrophotographic photoreceptor drums, if the pair of flanges initially attached to the base are different from the flanges used in the copying machine, flange fitting errors will occur after accuracy correction.
It is desirable to correct the accuracy after fitting the flange used in the copying machine.

The above description was about cylindrical substrates, but for those with a certain average shape, there is a method in which the surface position of each point is input into a computer in advance, and the coating liquid flows out in proportion to the difference from the actual measurement value. If you take it, you are not limited to the shape.

〔Example〕

Hereinafter, the method for manufacturing a cylindrical coated body according to the present invention will be described in detail with reference to FIG. 1, but the method is not limited thereto.

Example 1 The cylindrical substrate to be coated had an outer diameter of 79,9
A substrate for a photosensitive drum was used, in which an extruded aluminum tube having a length of 340 mm was pulled out once, and its cylindricity was 120 μ and R□X-5 μ.

As a means for discharging the coating liquid, the inner diameter is 0.39 mm and the outer diameter is 0.
．． Four 8 van stainless steel nozzles were arranged at 1.25 mm intervals in a line, offset by 37° in the direction of nozzle movement with respect to the axis of the substrate, and the distance between the nozzle tip and the substrate surface was 1.
．． It was set as 0 body.

As a coating liquid, epoxy resin BN-3050 (manufactured by Dainippon Shikizai Co., Ltd.) was used as a solvent (xylene/ethylene glycol).
1/I), resin content 70wt%, viscosity 250c
ps solution was used.

As for the other devices, the following products were used, and the position deviation measuring terminal was installed so that the distance from the average outer diameter of the substrate was 5.00 mm, and the distance from the center of the nozzle was 4 On++n.

Flow rate adjustment device nib lunger type. The piston rod is driven by a stepping motor.

Position deviation measuring device W: Laser micron displacement meter.

(LD-2500 manufactured by Keyence) Computer: PC-
9800 Drum rotation: AC servo motor Nozzle head movement Varnish Coating liquid (3) made from epoxy resin in a liquid hole equipped with a plunger type pump (4) that drives the piston rod with a chipping motor, a ball screw, and a linear way stepping motor. , switch the three-way valve (not shown) installed in front of the nozzle head to the liquid circulation side, and set the plunger pump (4) to a flow rate of 12cc.
It started at /min.

Press the cap-shaped flanges onto both ends of the aluminum drum (1), which has been roughly cleaned to remove adhering dust, and set it on the rotating shaft for 20 minutes.
It was rotated with Orpm.

After moving the nozzle head with the measurement terminal and nozzle (2) attached to the origin position on the left side in Figure 1, move it 800 mm.
The probe was started to move toward the other end at a constant speed of /min, and when the measuring axe had moved 45 m from the left end of the base, a signal was issued and the three-way valve was switched to the liquid outflow side.

During the movement, the measurement terminal took in data at 1000 x 2, and the average value of three points before and after was calculated, and the distance between the measurement terminal and the substrate at that point was calculated. With a time delay of 3000 m5ec, the calculator (9) outputs the number of pulses to the stepping motor driver based on the difference between the average distance and the actual measured distance, and the flow rate is set to 12 cc at a rate of ±2.87 cc/min for the distance difference of ±10 μ. /min. When the measurement terminal had moved 3511 IITl from the other end of the substrate, the three-way valve was switched to the circulation side again, and the coating operation was completed.

After coating, while rotating the substrate at 20 rpm,
The entire product was moved by hand on a guide rail to a far-infrared dryer. The far infrared heater has a heater temperature of 400°.
C, and the wind speed near the base is 0.3 m/
The air is discharged by balancing the pressure through a high-precision particle removal filter so that the air flow rate is sec. 10m
After drying for 1 n, the residual solvent amount was about 50 ppm.

After drying, the substrate was returned to the coater side and only measured using a position deviation measuring device in order to examine the uneven state of the surface of the substrate.

FIGS. 2 and 3 show developed contour lines of the uneven state of the substrate surface before and after coating, as measured by positional deviation measurements. The distance between contour lines is 15 μm and 10 μm, respectively. From these figures, it was found that the shape accuracy of the coated body surface was improved by the coating according to the present invention.

In addition, the epoxy resin used has an oil surface adhesion effect, and although the drum used was only roughly cleaned and the oil was not fully removed, there were no coating defects such as repelling, and the adhesive strength was great. Met.

Example 2 Copying machine flanges were pressed onto both ends of the aluminum drum in place of the applicator cap-shaped flanges used in Example 1 as flanges, and the rotating shaft was replaced with one with a smaller diameter that matched the copying machine flanges. Coating was carried out in the same manner as in Example 1.

After coating using the coating flange, the total runout of the sample is 4 when used in place of the copying machine flange.
It was 0μ, whereas it was 25μ when applied from the beginning using a copying machine flange. From this result, it can be seen that in order to obtain a better shape accuracy correction effect, it is preferable to apply the coating using the flange for the copying machine used.

Example 3 An ultraviolet curing paint, which is a low volume reduction paint, was used as the coating liquid, the following flow rate conditions were adopted, and a glass tube with an average outer diameter of 29.9 mm and a length of 300 mm was used as the cylindrical substrate. Coating was performed in the same manner as in Example 2.

UV curable paint Manufacturer: Three Bond Product name: TB3042 Volume reduction rate: 5% Curing device: 1kw mercury lamp Flow rate conditions: 0.8 cc/min for a deviation of 10 μm, starting from the flow rate value of 1 cc/min at the maximum convex part , the amount of application was increased as the deviation increased.

After coating is completed, transfer to the curing device while continuing to rotate.
It was irradiated with an ultraviolet lamp and left to stand for 1 minute to complete curing.

Through this operation, the cylindricity was improved from 120μ before coating to 1Oμ after curing.

Example 4 A conductive layer (mantimondoped SnO□ dispersion) was applied to the drum coated with the ultraviolet curable paint obtained in Example 3.

(manufactured by Mitsubishi Metals) with a dry film thickness of 3 μm, and a blocking layer (a butanol solution of nylon 6.6) with a dry film thickness of 0.5 μm, and a charge generation layer liquid and a charge transfer layer liquid with the following compositions. The coating was performed using the apparatus shown in FIG. 1 without the flow rate adjustment function, with a drying operation in between.

Separately, samples were prepared in which the same charge generation layer liquid and charge transfer layer liquid were coated on mirror-cut aluminum tubes, and the electrical properties (charging property, sensitivity, residual potential ) were compared and found to be equivalent.

1 -H'i, 1 The following bisazo compound 10 parts Phenoxy resin 5 parts (PKHH manufactured by Union Carbide Co., Ltd.) Polyvinyl butyral resin 5 parts (BH-3 manufactured by Block Chemical Industry Co., Ltd.) 4-Methoxy-4-methylpentanone-21000 These parts were mixed and subjected to pulverization and dispersion treatment using a sand grind mill.

2-44-a The following N-methylcarbazole-3 diphenylhydrazone polycarbonate resin The following cyano compounds cyclohexanone These were added and dissolved in a stirring tank.

Aldehyde 90 parts 100 parts 4.5 parts 950 parts [Effects of the Invention] As detailed above, according to the method for producing a coated body of the present invention, one or more By using a nozzle, a device for measuring the positional deviation of the substrate surface, a measuring terminal, a calculator, and a flow rate adjustment device,
Even for substrates with a low processing degree and rough surface shape, the amount of coating liquid, that is, the thickness of the coating film, can be changed depending on the unevenness of the surface area of the substrate, so the surface shape accuracy can be improved. It is possible to produce an improved and smooth coated body.

In particular, for coated bodies such as drums for electrophotographic photoreceptors that require strict precision and are required to be mass-produced at low cost in a short cycle time, the coating method of the present invention can be used in the substrate processing process. This makes it possible to reduce the amount of noise and improve accuracy, making a great contribution to industrial applications.

[Brief explanation of drawings]

Fig. 1 is a perspective view schematically showing the entire apparatus for coating the surface of a cylindrical substrate according to the method of this embodiment, and Figs. 2 and 3 show the unevenness of the substrate surface as developed contour lines. FIG. 2 shows the state before application, and FIG. 3 shows the state after application. (1)...Cylindrical base, (2)...Nozzle, (3)
... Coating liquid, (4) ... Flow rate adjustment device, (5) ...
・Drum rotation motor (6)...Nozzle feed motor, (7)...Ball screw mechanism, (8)...Position deviation measuring device, (9)...Calculation-:□“゛

Claims (2)

[Claims] (1) A method of manufacturing a coated body by forming a coating film on the surface of a cylindrical substrate, which is an object to be coated, in which the cylindrical substrate held horizontally is rotated, and the coating liquid to be fed is rotated. In a method for manufacturing a coated body, the nozzle head, which is equipped with one or more nozzles discharging at a specific coating width, is moved parallel to the axis of rotation to form a coated film continuously spread on the surface of the substrate, The coating device includes a computer, a flow rate adjustment device, and a position deviation measuring device, and a measurement terminal of the deviation measuring device measures the deviation from a set position at a portion of the substrate surface that has not been reached by the nozzle, and inputs the measured value into the computer. , the calculator calculates a discharge amount of the coating liquid according to the deviation,
commanding flow rate information corresponding to the calculated value to a flow rate adjustment device, the flow rate adjustment device adjusting the liquid amount corresponding to the flow rate information;
A method for manufacturing a coating body, characterized in that the adjusted amount of coating liquid is discharged from a nozzle when the nozzle reaches the measurement target site. (2) The method for producing a coated body according to claim 1, wherein the object to be coated is an electrophotographic photosensitive drum substrate.