JP2007007517A - Washing liquid vessel for coating apparatus, coating system and its washing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a washing liquid vessel for a coating apparatus capable of washing a coating vessel without exchanging it, a coating system provided with the washing liquid vessel and a washing method. <P>SOLUTION: The washing liquid vessel 4 has a washing liquid vessel body 4a; and a washing liquid transportation pipe strut 4b connected to the vessel body 4a. The washing liquid transportation pipe strut 4b is constituted such that a base end is internally communicated/connected to a bottom part of the washing liquid vessel body 4a and a distal end is detachably attached to a discharge port 5 of the coating vessel 3. It can be liquid-tightly attached such that the coating in the coating vessel 3 does not flow out from the discharge port 5 at attachment and the washing liquid vessel body 4a is left from the discharge port 5 in a height direction and can be supported. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a cleaning liquid container used for cleaning a coating apparatus that applies paint stored in a coating container by discharging it from a coating machine, a coating system including the cleaning liquid container, and a cleaning method for a coating apparatus using the cleaning liquid container. .

  As this type of coating equipment, the pressure-type coating method does not require the work of soaking the paint from the paint container into the roller, brush, or other coating machine. It is known as an efficient coating method (Patent Documents 1, 2, etc.).

  Pressurized coating methods include a sealed tank type pressurizing method in which a sealed paint tank is pressurized by an air compressor and the like, and a paint using a driving force of a pressure pump such as a diaphragm pump. Examples thereof include a pressure feeding pump type pressurizing method in which the paint stored in the container is sucked and the paint is pumped and discharged to a coating machine.

  Among the methods described above, the pressure-feeding type coating apparatus that employs a pressure-feeding pump type pressurizing method can be increased in size at a relatively low cost, and can stably discharge even high-viscosity paints. Are better.

And when washing | cleaning this kind of pressure feeding type coating device, the method of washing | cleaning is known, for example by replacing | exchanging a coating material container and a washing | cleaning-liquid container, and circulating the washing | cleaning liquid in a washing | cleaning-liquid container (for example, patent document) 2).
Japanese Patent Laid-Open No. 2003-33687 JP 2004-358461 A

  However, the cleaning method disclosed in the above prior art is not particularly problematic when the paint container is small, but when the paint container is large or there is a lot of residual paint in the paint container, the container replacement must be automated. For example, the labor for replacing the paint container is increased, and in order to perform the cleaning without replacing the paint container, it is necessary to first clean the paint container, which takes time and increases the amount of cleaning waste liquid. .

  Therefore, the present invention can wash the paint container without replacing the paint container, and can wash the paint path and the coating machine without washing the inside of the paint container. It is an object of the present invention to provide a coating system including a cleaning liquid container and a cleaning method.

  In order to achieve the above object, a cleaning liquid container according to the present invention is configured such that a cleaning liquid container main body, a base end is connected to a lower portion of the cleaning liquid container main body, and a distal end is detachable from the inside to the discharge port of the paint container. And a cleaning liquid transporting pipe column capable of supporting the cleaning liquid container main body when mounted.

  In order to achieve the above object, a pressure-feeding coating system according to the present invention includes a paint container having a discharge port at a lower portion, and a paint that is connected to the discharge port of the paint container and discharges paint by driving a pressure feeder. And a cleaning liquid container connected to the paint container, the cleaning liquid container having a base end connected to the lower portion of the cleaning liquid container main body and a distal end from the inside of the paint container. And a cleaning liquid transport pipe column which is configured to be detachable from the outlet and can support the cleaning liquid container main body when mounted.

  Furthermore, in order to achieve the above-described object, a cleaning method for a pressure-feed type coating apparatus according to the present invention includes a paint container having a discharge port at a lower portion, and a paint connected to the discharge port of the paint container by driving a pressure feeder. A cleaning method for a pressure-feed type coating apparatus having a discharge machine, wherein: (1) a cleaning liquid container body and a base end are connected in communication with a lower portion of the cleaning liquid container body, and a distal end is connected from the inside of the coating container A cleaning liquid container provided with a cleaning liquid transport pipe column which is configured to be detachable from the discharge port and can support the cleaning liquid container body when mounted; (2) a tip of the cleaning liquid transport pipe column is disposed at the end of the paint container; By connecting to the outlet, the discharge of the paint in the paint container from the discharge port is stopped, and the cleaning liquid stored in the cleaning liquid container body is discharged from the discharge machine from the discharge port under the driving of the pressure feeder. And wherein the Rukoto.

  The cleaning liquid container according to the present invention is mounted from the inside of the paint container discharge port paint material container, and the cleaning liquid is pumped into the pressure feeding type coating apparatus, so that the paint container can be removed without removing the paint container. Can be washed.

  A preferred embodiment of the present invention will be described below with reference to FIGS.

  FIG. 1 is a schematic configuration diagram showing an embodiment of a pressure-feeding coating system. The pressure-feed type coating system 1 includes a pressure-feed type coating apparatus 2 and a cleaning liquid container 4 that is detachably supported on the paint container 3 of the pressure-type coating apparatus 2.

  The pressure-feed type coating apparatus 2 includes a paint container 3 having a discharge port at a lower portion, and a coating machine 9 that is connected to the discharge port 5 of the paint container 3 and discharges the paint by driving a pressure-feeder 7.

  The paint container 3 can employ a hopper. The paint container 3 is not limited to a container having no lid on the upper opening such as a hopper, but may be a pressure-resistant container with a lid for closing the upper opening.

  The paint container 3 is supported by a support frame 6 with wheels. The pressure feeder 7 is arranged in the lower space of the paint container 3 supported by the support frame 6 with wheels. The pressure feeder 7 can employ a diaphragm pump, a plunger pump, or the like.

  Although not shown, it is also possible to adopt a sealed tank type pressurizing method in which the pressure feeder is an air compressor, and the sealed paint container is pressurized by the air compressor and the paint is pressure-fed to the coating machine. However, in this case, the cleaning liquid container 4 is also a sealed pressurized container in order to push out the cleaning liquid using an air compressor.

  The suction port of the pressure feeder 7 is connected to the discharge port 5 of the paint container 3 from the outside of the paint container 3, and the paint supply pipe 8 connected to the discharge port of the pressure feeder 7 is connected to the paint machine 9. The discharge port 5 of the paint container 3 and the suction port 7a of the pressure feeder 7 are detachable.

  In the illustrated example, the coating machine 9 is a pressure-feed roller coating machine, but is not limited thereto, and other coating machines used for pressure-feed type coating such as a pressure-feed brush gun can also be adopted.

  As shown in FIGS. 2 and 3 in an enlarged manner, the pressure roller coating machine constituting the coating machine 9 includes a roller portion 9b with a built-in core 9a, a support portion 9c, and a gripping portion 9d. A switch 10 for turning on / off the supply of paint can be disposed in the paint supply pipe 8. The switch 10 controls the on-off valve 11 interposed in the paint supply pipe 8. The on-off valve 11 in the illustrated example is an air operated valve, which is opened and closed by pressurized air supplied from an air compressor 12 through air tubes 12a and 12b, and the pressurized air is a switch interposed between the air tubes 12a and 12b. 10 is turned on and off.

  In the pressure roller coating machine constituting the coating machine 9, the paint supply pipe 8 connecting the pressure feeder 7 and the roller core 9a is hollow, one end of which is connected to the pressure feeder 7, and the other end of the roller core 9a. It is linked to. The paint supply pipe 8 is preferably light in weight and excellent in flexibility from the viewpoint of painting workability. In addition, the paint supply pipe 8 is connected to the pressure feeder 7 from the on-off valve 11 with a high pressure resistance, and the paint supply pipe 8 with a low pressure-resistance connecting the on-off valve 11 to the roller core 9a. -2.

  Since a high pressure for conveying the paint may be applied to the paint supply pipe 8-1, it is desirable that the paint supply pipe 8-1 has a high pressure resistance. Specifically, the pressure resistance is 0.1. The inner diameter is preferably in the range of 5 to 13 mm, and the outer diameter is preferably in the range of 7 to 25 mm. Examples of the material include resins such as nylon, urethane resin, fluororesin, vinyl resin, and vinyl chloride resin, and may be reinforced with a steel wire or nylon thread.

  On the other hand, since the pressure applied from the on-off valve 11 to the roller core 9a is low in the paint supply pipe 8-2, the pressure resistance of the paint supply pipe 8-2 may be low. The pressure resistance of the supply pipe 8-2 is 10 MPa or less, preferably in the range of 0.3 to 2.5 Mpa, the inner diameter is in the range of 4 to 13 mm, and the outer diameter is in the range of 5 to 20 mm. It is desirable to be. Examples of the material include nylon, urethane resin, fluororesin, vinyl resin, vinyl chloride resin, and the like, and vinyl chloride resin is suitable.

  The roller part 9b is located in the front-end | tip part of the pressure feeding roller coating machine 9, and is comprised by the rotatable cylindrical porous part which incorporates the core 9a and covers the core 9a.

  The core 9a is attached to the hollow inside of the cylindrical porous portion constituting the roller portion 9b, and a conventionally known one can be used. Although the core 9a has a triangular prism shape in the illustrated example, the shape is not limited, and the cross-sectional shape may be a polygonal column such as a cylinder or a quadrangular column, and may be a combination of these, but the inside is hollow. It is preferable that In particular, since the liquid paint oozes out to the roller portion 9b made of a porous material becomes uniform, it is preferably a polygonal column, and the thickness of the outer side line of the polygonal column constitutes the roller portion 9b. The degree of contact with the hollow inner wall of the cylindrical porous portion is preferable. As a result, a substantially “kamaboko-like” hollow portion X is formed between the hollow inner wall surface and the outer surface portion of the polygonal column. Then, it is preferable to provide a plurality of paint rectifying holes 9e on the surface portion of the core 9a (there are three surfaces if triangular prisms).

  The paint rectifying hole 9e is provided to adjust the liquid paint pumped from the paint container 3 through the pump 7 so that the liquid paint oozes uniformly from the cylindrical porous portion of the roller portion 9b. Further, the hollow portion 9f of the core 9a is provided as a paint distribution path for transporting the liquid paint inside the core, and the shape is preferably cylindrical. The inner diameter of the core 9a is suitably in the range of 2 to 5 cm and the length in the range of 5 to 30 cm.

  The liquid paint thus pumped flows from the paint inlet of the core 9a of the roller part 9b into the hollow part 9f, which is the paint flow path inside the core 9a, and then passes through the hollow part 9f to the paint rectifying hole 9e. From the hollow inner wall surface of the roller portion 9b and the outer surface portion of the core 9a to reach a “kamaboko-like” hollow portion, and then ooze out to the outside through the roller portion 9b. Yes.

  The paint rectifying holes 9e provided in the core 9a penetrate through the core so as to communicate with the outside, and a plurality, preferably 2 to 10, particularly preferably about 2 to 5, are provided per core. desirable. The inner diameter is suitably about 0.5 to 10 mm, particularly about 1 to 8 mm. Moreover, when providing the several coating material rectification | straightening hole 9e in a single core, the internal diameter may be the same, Especially an entrance vicinity into which a liquid coating material flows in has a small internal diameter (for example, 0.5-4 mm, (Preferably 1 to 3 mm) When the inner diameter is increased at the farthest position (for example, 6 to 10 mm, particularly 7 to 8 mm), the amount of the liquid paint leached out from the cylindrical porous portion constituting the roller portion 9b is increased. It is preferable because it tends to be uniform. The paint rectifying holes 9e may be provided with substantially the same number of one or more on each surface of the core.

  The paint rectifying hole 9e provided in the core 9a is provided so that the liquid paint thus pumped out from any part of the roller portion 9b with a proper balance so that the paint can be uniformly transferred to the object to be coated. It is preferable to provide one or more in the vicinity of the paint inlet and in the innermost part, and one or more in the central portion of the core 9a, etc., at equal intervals, if necessary. If the inner diameter of the paint rectifying hole 9e in the vicinity of the paint entrance is 1, the inner diameter of the paint rectifying hole 9e in the back may be increased by about 2 to 5 times.

  The direction of the paint rectifying hole 9e may be perpendicular or inclined with respect to the surface portion of the core 9a (there are three faces in the case of a triangular prism), and specifically, the paint rectifying hole 9e. Is preferably in the range of 10 ° to 90 ° with respect to the core surface portion provided with the coating or the rectifying plane having the paint rectifying hole as a contact, and particularly has an angle in the range of 10 to 60 °. It is desirable.

  Here, the core surface portion provided with the paint rectifying holes 9e means the flat surface when the surface provided with the paint rectifying holes is a flat surface. Further, the tangential plane having the paint rectifying hole 9e as a contact means a plane having the paint rectifying hole on the curved surface as a contact when the paint rectifying hole is provided on the curved surface.

  When the paint rectifying hole 9e has an inclination angle, the liquid paint can be uniformly and efficiently transferred from the paint flow path inside the core to the porous portion. A nozzle capable of adjusting the flow direction of the liquid paint can be attached to the paint rectifying hole 9e.

  The cylindrical porous portion constituting the roller portion 9b is usually a wool roller, a mastic roller or the like formed by winding a porous body such as wool, chemical fiber or sponge around the outer surface of a cylindrical roller such as a paper tube. It has a porous structure in which the liquid paint oozes out from the inside to the outside.

  A conventionally well-known thing can be used as the support part 9c which supports the roller part 9b, The tubular thing which made the inside hollow and can also be used as a paint supply pipe can be used.

  The grip portion 9d can partially include a support portion 9c and a paint supply pipe 8 described later. The material, shape, and the like are not limited as long as they can be gripped. However, a lightweight material is suitable for positioning the center of gravity at the time of painting on the roller side, and resin is particularly preferable.

  The switch 10 is provided to remotely operate an on-off valve, which will be described later. Examples of the structure of the switch include a push button type that generates an electric signal and an air signal.

  In addition, a stain prevention plate (not shown) for receiving the rebound paint can be attached to the grip portion 9d as necessary.

  The on-off valve 11 is provided to adjust the amount of paint supplied to the roller part, and can be disposed in a paint supply pipe that connects the roller part core and the paint pressure feed pump. The on-off valve 11 may be either a solenoid valve that operates by receiving an electrical signal by a remote control switch or an air operated valve that operates by receiving an air signal. Further, it may be of a type that operates by converting an operator's voice or the like into an electric or air signal.

  The structure of the on-off valve 11 includes a needle type, a ball type, a butterfly type, and the like. There is no particular limitation as long as it is a structure that can control the liquid, but a needle type is preferable.

  The installation position of the on-off valve 11 is desirably on the paint supply pipe 8, and the distance between the on-off valve and the gripping portion is 50 to 300 cm, preferably 100 to 200 cm.

  If the distance between the on-off valve 11 and the gripping part 9d is less than 50 cm, it may be difficult to perform the painting operation. Not only is it not possible, but the amount of paint to be discharged tends to decrease.

  Further, the on-off valve 11 disposed in the paint supply pipe 8 can be fixed to the body of the paint worker, a scaffolding at the work site, or the like.

  In the roller coating machine 9, the weight of the gripping part 9d can be reduced by disposing a heavy on-off valve 11 on the paint supply pipe 8, and the center of gravity of the roller coating machine 9 during painting can be reduced from the gripping part 9d. It can be moved to the roller part side, and the total weight of the roller part 9b, the support part 9c, and the grip part 9d can be reduced.

  As the liquid paint stored in the paint container 3, known ones are used and can be arbitrarily selected depending on the purpose. Specific examples include water-based, organic solvent-based, and solvent-free paints containing acrylic resin, polyester resin, alkyd resin, polyurethane resin, etc. as a base resin. These include room temperature drying, room temperature curing, polymerization reaction. It is classified into a curable type and any of them can be applied. Furthermore, the liquid paint can form a colorless and transparent, colored and transparent coating film. Here, “coloring” includes solid color tone, metallic tone, light interference tone, and the like.

  The viscosity of the liquid paint is preferably 5000 Pa · s / 20 ° C. or less, and particularly preferably in the range of 100 to 4000 Pa · s / 20 ° C.

  In this specification, the viscosity of the liquid paint is a value obtained by adjusting the sample to 20 ° C. and measuring it at 20 revolutions / minute with a B-type viscometer.

  In the case where the liquid paint is a water-based paint or an organic solvent-based paint, the solid content of the liquid paint is preferably 1 to 95% by weight, preferably 40 to 80% by weight.

  As shown in FIG. 1, the cleaning liquid container 4 connected to the paint container 3 is connected to the cleaning liquid container main body 4 a and the base end thereof in communication with the lower part of the cleaning liquid container main body 4 a, and the tip is connected to the discharge port 5 of the paint container 3. A cleaning liquid transport pipe column 4b configured to be detachable from the inside and capable of supporting the cleaning liquid container body 4a when mounted.

  The cleaning liquid container main body 4a preferably has a smaller capacity than the paint container 3. The cleaning liquid container main body 4a has an opening 4c formed at the top, and an opening 4d with an external screw protruding outward at the bottom. In addition, about the opening 4c, a lid | cover can also be attached as needed.

  The cleaning liquid transport pipe column 4b is mainly composed of a rigid pipe, and a coupling part 4e having an inner screw threaded to the outer screw of the mouth part 4d is fixed to the base end thereof. The distal end of the rigid tube can be fitted into the discharge port 5 of the paint container 3, and the cleaning liquid container body 4a can be supported by fitting the distal end into the discharge port. Therefore, the cleaning liquid container 4 can be attached to and detached from the paint container 3 simply by inserting and removing the tip of the cleaning liquid transport pipe column 4 b into the discharge port 5 of the paint container 3.

  In addition, as an aspect which mounts the washing | cleaning-liquid transport pipe support | pillar 4b in the discharge port 5 of the coating material container 3, although the example of illustration shows the structure which inserts the washing | cleaning-liquid transport pipe support | pillar 4b in the discharge outlet 5, it is not limited to this, Various connection forms such as a configuration in which a screw part is formed in the discharge port 5 and screwed to the screw part can be adopted. Further, the cleaning liquid transport pipe column may be formed integrally with the cleaning liquid container.

  At the time of painting, the cleaning liquid container 4 is removed from the discharge port 5, and the liquid paint is stored in the paint container 3. Before injecting the liquid paint into the paint container 3, a vinyl sheet (not shown) is stretched on the inner surface of the paint container 3 to cover the inner surface so that the liquid paint does not adhere to the inner surface of the paint container. Specifically, one side of a thin vinyl sheet is bonded to the upper opening edge of the paint container 3 with gum tape or the like, and the other side edge is inserted into the discharge port 5 and fastened by a fastening pin 15 (see FIG. 4). . In addition, the vinyl sheet with a tape can use what the mask film with a cloth tape is generally marketed as a coating article "masker".

  The fastening pin 15 is originally intended to fasten the waterproof elastic ring 16 (FIG. 4) disposed in the discharge port 5 in the discharge port 5, and is substantially ring-shaped and is radial by holding elasticity. The diameter can be increased or decreased by a pair of operation portions 15a extending from the ring-shaped portion. Reference numeral 16 denotes a screwing handle, and the screwing handle is screwed into a screw formed on the outer peripheral picture of the suction port of the pressure feeder 7 so that the paint container 4 is firmly attached to the pressure feeder 7. Can be fixed.

  After the coating of the inner wall surface of the paint container 3 with the vinyl sheet is completed, a liquid paint is injected into the paint container 3, the pumping machine 7 is driven, and coating is performed with the paint discharged from the coating machine 9.

  After the completion of painting, the driving of the pressure feeder 7 is stopped, the cleaning liquid transport pipe support column 4b of the cleaning liquid container 4 is inserted into the discharge port 5, and the cleaning liquid container body 4a is supported with respect to the paint container 3, thereby the cleaning liquid container body 4a. Can be spaced apart from the outlet 5 in the height direction and placed on the paint liquid surface. By inserting the cleaning liquid transport pipe column 4 b into the discharge port 5, the liquid paint in the paint container 3 is stopped from being discharged from the discharge port. When the coating machine 9 is the above roller coating machine, it is preferable to remove the roller portion 9b made of sponge or the like and wash it separately.

  Next, a cleaning liquid (mainly water in the case of a liquid aqueous paint) is injected into the cleaning liquid container body 4a of the cleaning liquid container 4, and the pressure feeder 7 is driven again. By driving the pressure feeder 7, the inside of the pressure feeder 7, the paint supply pipe 8, and the coating machine 9 is cleaned. The tip of the coating machine 9, that is, the portion from which the cleaning liquid is discharged is preferably disposed in the cleaning liquid container body 4a so that the cleaning liquid circulates. It is desirable to replace the cleaning liquid at least once.

  If the cleaning liquid remains in the paint supply pipe, the paint becomes overdiluted and settles and tends to condense. Condensed paint is difficult to re-decompose and causes a decrease in discharge amount due to pressure loss at the next use. Therefore, it is desirable to discharge the cleaning liquid in the paint supply pipe 8 after the cleaning with the cleaning liquid is finished. Pressurized air from the air compressor 12 can be used to discharge the cleaning liquid in the paint supply pipe 8. Specifically, for example, an air tube joint is provided in the paint supply pipe 8, and the air tube 12a connected to the air compressor 12 is replaced with the air tube joint, so that the pressurized air from the air compressor 12 is supplied. The residual paint solution in the paint supply pipe 8 can be discharged by sending it into the paint supply pipe 8.

  After the cleaning with the cleaning liquid is completed, the pressure feeder 7 is removed from the paint container 3 and an empty can such as a paint can is disposed at the lower part of the paint container 3, and then the cleaning liquid container 4 is detached from the paint container 3 and the paint is discharged from the discharge port. Receive with the empty can.

  Thereafter, the vinyl sheet is removed, the paint slightly adhered to the paint container 3 and the pressure feeder 7 is wiped and cleaned, and the washing is finished.

  By using the cleaning liquid container 4 having the above-described configuration, it is possible to clean the pressure feeding type coating apparatus without removing the paint container, and it is possible to clean the paint path and the coating machine without cleaning the paint container. The cleaning work efficiency is improved.

It is a schematic block diagram which shows one Embodiment of the pressure-feed type coating system which concerns on this invention. It is sectional drawing which expands and shows the coating machine which is a component of the pressure-feed type coating system shown in FIG. It is sectional drawing which follows the III-III line of FIG. It is sectional drawing which expands and shows a part of washing | cleaning-liquid container which is a component of the pressure-feed type coating system shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pressure-feed type coating system 2 Pressure-feed type coating device 3 Paint container 4 Cleaning liquid container 5 Outlet 7 Pressure feeder 8 Paint supply pipe 9 Coating machine

Claims (3)

A cleaning liquid container connected to a paint container of a coating apparatus, comprising a cleaning liquid container main body and a cleaning liquid transport pipe strut connected to the container main body, the base end of the cleaning liquid transport pipe strut being the main body of the cleaning liquid container Is connected to the bottom of the paint container, the tip is configured to be detachable from the discharge port of the paint container, and can be liquid-tightly attached so that the paint in the paint container does not flow out of the discharge port when installed. The cleaning liquid container is configured to be able to support the cleaning liquid container main body at a distance from the discharge port in the height direction. A paint container having a discharge port at the bottom, a coating machine that is connected to the discharge port of the paint container and discharges the paint by driving a pressure feeder, and a cleaning liquid container connected to the paint container,
The cleaning liquid container has a cleaning liquid container main body and a cleaning liquid transport pipe strut connected to the container main body, and the cleaning liquid transport pipe strut is connected to a bottom end of the cleaning liquid container main body so as to communicate internally. The tip is configured to be detachable from the discharge port of the paint container, and when installed, the paint in the paint container can be attached in a liquid-tight manner so that it does not flow out of the discharge port, and the cleaning liquid container body is raised from the discharge port. A pressure-feeding coating system characterized in that it is configured to be supported in such a way as to be spaced apart in the vertical direction. A cleaning method for a pressure-feed type coating apparatus, comprising: a paint container having a discharge port at a lower part; and a coating machine that is connected to the discharge port of the paint container and discharges paint by driving a pressure-feeding machine,
A cleaning liquid container main body, and a cleaning liquid transport pipe strut connected to the container main body, the cleaning liquid transport pipe strut having a proximal end connected to the bottom of the cleaning liquid container main body, and a distal end connected to the paint container It is configured to be attachable to and detachable from the discharge port, and can be liquid-tightly mounted so that the paint in the paint container does not flow out of the discharge port when mounted, and the cleaning liquid container body is separated from the discharge port in the height direction. Prepare a cleaning liquid container that can be supported by
By connecting the tip of the cleaning liquid transport pipe column to the discharge port of the paint container, the discharge of the paint in the paint container from the discharge port is stopped, and the cleaning liquid stored in the cleaning liquid container body is discharged to the discharge port. The cleaning method is characterized by discharging from the coating machine under the driving of the pressure feeder.

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