JPH1157600A - Working method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lessen the working time for a product change by horizontal rotatably clamping works on a pallet and executing a cleaning stage and a coating application stage in this order without changing chucks. SOLUTION: Coating film formation is executed by transferring the works 1 which are clamped in the cleaned state in the previous state and are horizontally rotatably held on the pallet to a coating application stage by the movement of the pallet, lowering a coating application head 40 elastically pressed by piano wires 20, discharging a coating liquid from the tips of the nozzles 31 and bringing blade surfaces 22 into contact with the works 1. One set each up to the blades 21, 22 from a holding tank 25 is prepd. for one piece each of the works and the set number equal to the number of the works is mounted at one bar. The bars are lowered as the works 1 arrive. The total number of the works on the pallet are then coated at one time and the bars are risen when the coating ends. There are plural coating a stages and the sets holding the different coating liquids are prepd. at the time of coating of the multiple layers. The influence of the sag of the coating liquids is prevented and the jig changes at the time of changing the kinds are decreased.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a processing method for obtaining a good coating film with coating being the last step. More specifically, the present invention relates to a processing method for performing coating after cleaning of a coating substrate.

[0002]

2. Description of the Related Art As a coating method, a work must be performed by always gripping a work vertically, for example, dip coating,
Ring coating (or slide-kipper coating), as well as those in which the gripping direction of the workpiece is vertical or horizontal, such as ink-jet coating, spray coating, and those in which horizontal gripping is desirable, blade coating, multi-layer coating There is nozzle coating and the like. The wet film applied on the work is fixed by evaporative concentration or reaction solidification. However, the wet film flows until the fluidity of the film is lost. In the case where hating is not desired, it is generally desirable to use a gripping direction in which the influence of gravity can be eliminated by rotating the lens so as not to cause a flow due to gravity, that is, a horizontal gripping.

[0003] From another viewpoint of various coating methods, dip coating repeatedly uses a coating solution, so that coating solution contamination is likely to occur, and the stability of the solution is strong in order to reduce the loss of the coating solution. There is a problem that it is required, and from that point, a method of using up the coating solution in one pass is preferable. Also, spray coating has low adhesion efficiency and large loss,
This is not a very preferable method. From the above, as a preferable coating method on the substrate, there are ink jet coating, blade coating, multi-nozzle coating, and the like.

When these coating methods are carried out industrially, the work is generally gripped so as to be rotatable in a horizontal direction, the base is cleaned before coating, and several layers of coating are applied. Further, when the above-mentioned several steps are successively performed, as a transport method, there is a choice of fixing the work and moving the processing means or fixing the processing means and moving the work.

[0005]

When the work is fixed, the work is loaded onto the horizontal rotating means, and after the machining, the work is unloaded from the means. Each device must be circulated to move to the next processing stage where several rotating workpieces are fixed. It fixes loading, processing and unloading,
It is several times more difficult than the method of moving a pallet on which a work is placed. For example, there is a significant difference between performing a simple and same shape pallet holding a workpiece horizontally and rotating it, and performing a loading, unloading, and moving system of means even if one positioning is taken. Therefore, generally, the processing means is fixed, and the pallet on which the work is placed is moved.

At this time, if the form of processing is completely different, it becomes difficult to perform some processing on the same pallet.
For example, in contrast to a blade coating method in which a blade with an integrated nozzle and smoothing member is pressed against a rotating workpiece while the coating liquid is discharged from the nozzle and the blade is moved in the axial direction of the workpiece, cleaning of the workpiece before coating is performed. In the case of immersion type cleaning, the chuck for cleaning is not only different from that at the time of coating, but also in the cleaning process, if the chuck is not changed, the liquid of the previous process is brought to the subsequent process and the liquid of the subsequent process is cleaned. It is desired to change the chuck for each process because the degree is impaired. When the above-mentioned cleaning and coating are combined, the structure of the pallet itself needs to be different between the two, which not only complicates the transport system, but also changes the work for changing the type, and requires changing the chuck. Therefore, the number of jigs to be replaced increases, and it takes a long time to change types.

[0007]

In view of the above situation, as a result of various studies, it has been found that these problems can be solved by the following method, and the present invention has been accomplished. That is, the gist of the present invention resides in a processing method in which a workpiece is held on a pallet so as to be horizontally rotatable, and a cleaning step and a coating step are performed in this order without changing a chuck. In addition, the cleaning step is preferably a non-immersion type cleaning step such as tape cleaning, ultrasonic sprinkling cleaning, laser irradiation cleaning, and the like, and a horizontally rotatable gripping method includes setting a flange on a work in advance, A method of gripping the flange hole is preferable.

[0008]

According to the present invention, the whole system is simplified as compared with the method of moving the processing apparatus by fixing the work on the pallet and transporting the pallet. Also, the work is gripped so that it can be rotated horizontally, and is rotated horizontally during coating,
The influence of sagging due to the gravity of the coating solution can be prevented. Furthermore, before the cleaning process, the workpiece is held so that it can rotate horizontally,
By continuously introducing the chuck without changing the chuck, it is possible to reduce the number of jigs that need to be changed in accordance with the change in type, and to reduce the time required for changing the type. In the cleaning step, by adopting a non-immersion type cleaning step, contamination of the coating liquid by the cleaning liquid attached to the chuck can be prevented.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a tape cleaning method will be described as a typical example of a non-immersion type cleaning method.
FIG. 1 is an overall view of a tape cleaning and cleaning system when the work 1 is cut at a right angle to the rotation axis. The work 1 held in a horizontally rotatable state on the pallet comes to the washing stage, the washing head 2 descends, and the rotating work 1 is pressed by the rotating rubber rollers 4, 4 'with the tape 3, 3' wetted with the washing liquid. Rub the tapes 3, 3 'onto the reels 5, 5'
From the reels 6 and 6 ′.

The rubber rollers 4, 4 'are supported by air cylinders 7, 7' and springs 8, 8 ', respectively, and the pressing force is kept constant by the springs 8, 8'. The pressing is stopped by separating the rubber rollers 4, 4 'from the drum 1 by the air cylinders 7, 7'. The left and right rubber rollers 4, 4 'are not flush with each other, and one rubber roller surface is a speed control motor (not shown)
Roller 9 and pressing rubber roller 1 driven by
0 and the reels 5 and 6 are mounted so as to be on the same plane.

When there are a plurality of workpieces, the same number of cleaning heads 2 are provided, but the torque motors for driving the reels 5 and 6 and the speed control motor for driving the rubber rollers 9 are mounted in the opposite directions to interfere with each other. Don't do it. The rubber rollers 4, 4 'are pulled up by the action of the air cylinders 7, 7' when the pallet on which the work 1 is loaded comes to the washing stage. Since the rubber rollers 4, 4 'are not on the same plane, the air cylinders 7, 7'
Is released at the same time, there is an inconvenience that the rubber roller 4 at the rear hits the flange. The release time of both air cylinders 7, 7 'is shifted so as to start rubbing from the same place on the work. Although the tape cleaning has been described above, the cleaning method is not limited to this. For example, non-immersion cleaning such as spraying a liquid superimposed with ultrasonic waves, irradiating a defocused laser beam, or irradiating ultraviolet rays is performed. The same method can be applied.

Next, a coating method will be described. FIG. 2 is an overall view of one work of the coating system when the work 1 is cut at right angles to the rotation axis. The work 1 held in a horizontally rotatable state on the pallet, cleaned in the previous process, and held as it is during cleaning comes to the coating stage by moving the pallet, and the coating head 40 elastically abutted by the piano wire 20 is moved. The coating liquid descends from the tip of the nozzle 31, the blade surface 22 comes into contact with the work 1, moves in the axial direction of the rotating shaft, and the coating film is formed.

The material of the blade surface 22 is, for example, a material obtained by laminating a conductive polyethylene sheet on an elastic foamed polyethylene sheet. The foamed polyethylene sheet is fused to an aluminum plate 21 having a curvature in two directions. Holes are formed at the four corners of the aluminum plate, and piano wires are inserted into the holes, and one end is screwed with a fixing tool 31 so as to be brought into elastic contact with the work 1 as a whole. Valve 2
7. The tip end of the fixture 23 forms a coating head 40, which moves up and down and is attached to and detached from the work 1 on the pallet.

24 is a coating solution, 25 is a hold tank, 2
6 is a plunger pump. The work 1 is placed on the pallet and comes to the application stage intermittently.
6 alternately opens and closes valves 28 and 29 to repeat suction and discharge. One set is provided for each work, from the hold tank 25 to the blades 21 and 22. The number of sets equal to the number of works is attached to one bar, and the bar descends as the work arrives. Then, the entire number of works on the pallet is applied at once, and the bar rises as the application is completed. In the case of multi-layer coating, there are a plurality of coating stages, and a set holding different coating liquids is prepared.

FIG. 3 shows a portion of the upper portion of the pallet for horizontally rotating and holding the work, and FIG. 4 shows a situation in which cleaning, coating and coating are repeated by reciprocating the two stages. Flanges 50 and 51 are set in the work 1 in advance, and an inner expanding collet chuck is fitted in the flange hole. 4 is transmitted via a gear 52 attached to a shaft extending from one collet chuck.

Reference numeral 61 denotes a pallet moving motor. A part of the pallet is fixed to a timing belt 62 stretched through gears. The pallet moves right and left by forward and reverse rotation of the motor 61. It moves at the feed speed corresponding to each condition. 63 is a coating head,
Although only the left stage is shown in FIG. 4, the right stage is also provided at a symmetric position. 2 is fixed to a shaft table driven by an AC servomotor, and when the application zone of the work 1 reaches the application head, the work 1 descends according to the diameter of the work 1 and the blade 2
2 contacts the work.

[0017]

According to the method of the present invention, it is possible to prevent the influence of the dripping of the coating solution and to change the jig at the time of changing the product type. This is a particularly suitable method for doing so.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an example of a cleaning method used in the present invention.

FIG. 2 is an explanatory view showing an example of a coating step used in the present invention.

FIG. 3 is an explanatory diagram of a method for holding a work on a pallet.

FIG. 4 is an explanatory diagram of a method of transferring a work from a cleaning process to a coating process.

[Explanation of symbols]

 Reference Signs List 1 work 2 cleaning head 3 cleaning tape 4, 9, 10 rubber roller 5, 6 reel 7 air cylinder 8 spring 20 piano wire 22 coating blade 23 fixing tool 24 coating liquid 25 hold tank 26 plunger pump 27, 28, 29, 30 Valve 50,51 Flange 52,60 Gear 61 Pallet transfer motor 63 Coating head

Claims (4)

[Claims] 1. A processing method comprising: gripping a work on a pallet so as to be able to rotate horizontally; and performing a cleaning step and a coating step in this order without changing a chuck. 2. The method according to claim 1, wherein a flange is set on the workpiece in advance, and the workpiece is gripped so as to be horizontally rotatable by gripping the flange hole. 3. The method according to claim 1, wherein the cleaning step is a non-immersion type cleaning method. 4. The method according to claim 1, wherein the workpiece is a tube for an electrophotographic photosensitive member.