JP5541501B2 - Coating film forming apparatus and coating film forming method - Google Patents

Description

  The present invention includes a container capable of charging a large number of media coated with a film-forming material, a suspension part for suspending an object to be coated in the container, and a vibrator for vibrating the entire container. The present invention relates to a coating film forming apparatus and a coating film forming method using the apparatus.

  There exists patent document 1 shown below as prior art document information relevant to this kind of coating-film formation technique. In the coating film forming technique described in Patent Document 1, a large number of steel balls or the like (transfer medium) coated with an adhesive layer or a paint layer (all of which are coating film forming materials) are loaded into a container together with a coating object. When the container is vibrated with external force, the steel ball adhesive or paint is transferred to the surface of the object to be coated. Even when the object to be coated is a long channel-shaped member, a relatively uniform coating film including the inner surface of the object to be painted can be formed by suspending it vertically in the container.

  First, the steel layer coated with the pressure-sensitive adhesive layer is used to transfer the pressure-sensitive adhesive layer to the surface of the object to be coated (preliminary process), and as the next step, on the pressure-sensitive adhesive layer of the object to be coated thus obtained. In addition, a coating film forming method for transferring a target paint layer using a steel ball coated with a paint layer (main coating process) is well known. Here, for convenience, either the adhesive layer or the paint layer is used. Is also called a coating film.

Japanese Patent Laid-Open No. 6-154698 (paragraph 0046, FIG. 9)

  However, in the coating film forming apparatus described in Patent Document 1, when the coating object that has completed the coating film formation is recovered from the medium layer, a large number of media tend to adhere to the surface of the coating object. In order to remove the adhering medium from the object to be coated with compressed air or a special tool, it was necessary to provide a new process or equipment. Further, since not only the adhesion medium but also the coating film tends to be peeled off from the object to be coated by the new removal process, it is necessary to form a coating film with an extra thickness in advance. Furthermore, in this case, it is necessary to collect the removed adhesion medium and the peeled coating film, and in some cases, to discard them.

  Therefore, in view of the problems given by the conventional coating film forming apparatus exemplified above, the object of the present invention is to form a relatively uniform coating film even on a coating object having a complicated cross-sectional shape, and to form a coating film. Another object of the present invention is to provide a coating film forming apparatus that does not require a process for removing the adhesion medium from the object to be coated.

The first characteristic configuration of the coating film forming apparatus according to the present invention is:
A container capable of charging a large number of media coated with a film-forming material;
A suspension part for suspending a coating object in the container;
A vibrator that vibrates the entire container;
A drawing mechanism for pulling out the object to be coated from the medium layer in the container being vibrated by the vibrator;
And a striking mechanism that applies a lateral impact force to the painting object via the suspension when the painting object is drawn from the medium layer in the container by the drawing mechanism .

  In the coating film forming apparatus according to the first characteristic configuration of the present invention, since the medium coating object is frequently collided with the medium by vibration by the vibrator, the coating film forming material of the medium is transferred. A uniform coating can be formed even on complicated coating objects. In addition, when the medium coating object is pulled out from the medium layer in the container by the pulling mechanism, a lateral impact force can be applied to the coating object by the striking mechanism, so that the medium coating object adheres to the surface of the medium coating object. The medium can be effectively removed by impact and dropped into the container. Accordingly, a coating film forming apparatus is provided that does not require a separate process for removing the adhering medium from the object to be coated on which the coating film has been formed and a process for collecting the medium that has fallen and scattered outside.

  Another characteristic configuration of the coating film forming apparatus according to the present invention is that the striking mechanism is configured to be able to continuously apply the impact force during a pulling operation by the pulling mechanism.

  With this configuration, a lateral impact force is continuously applied while the object to be coated is pulled out of the medium layer in the container by the pulling mechanism, so that the medium adhering to the surface of the object to be coated is more It is definitely shaken off.

  Another characteristic configuration of the coating film forming apparatus according to the present invention is that the medium is discharged from a discharge port provided in a bottom portion of the container as the pulling mechanism, thereby pulling out the object to be coated from the medium layer.

  With this configuration, the medium layer-air interface automatically descends as the medium is gradually discharged from the discharge port by vibration, and as a result, the coating object on which the coating film is formed is removed. It will be drawn from the media layer. Since it is not necessary to provide a device for pulling the painting object upward as a drawing mechanism, a particularly large building is not required when processing a long painting object. Further, the coating film forming medium can be collected in a collecting container provided under the discharge port, and can be easily handed over to a regeneration process for next use.

  Another characteristic configuration of the coating film forming apparatus according to the present invention is that an elevating operation mechanism for repeatedly moving the coating object up and down is provided.

  In this configuration, in addition to the operation of applying a lateral impact force by the striking mechanism to the coating object drawn from the medium layer in the container by the drawing mechanism, the coating object is moved repeatedly up and down, Since a phenomenon that the medium is clogged in the inner surface of the object to be coated, such as a tube or a cross-section, is prevented from flowing, the medium that easily adheres to the inner surface of the object to be coated is also effectively shaken off.

The first characteristic configuration of the coating film forming method according to the present invention is:
An installation process for installing a suspended painting object in a container;
A charging step of charging the container with a large number of media coated with a film-forming material and burying the object to be coated in the medium layer;
A vibration process for vibrating the container;
A drawing step of drawing out the coating object from the medium layer at a predetermined speed during the vibration step;
And a striking step of applying a lateral impact force to the coating target when the coating target is pulled out of the medium layer by the pulling step .

  In the coating film forming method according to the first characteristic configuration of the present invention, the medium coating object is transferred to the coating film forming material of the medium by frequently colliding with the medium due to vibration by the vibration process, so that the cross-sectional shape is A uniform coating can be formed even on complicated coating objects. In addition, since a lateral impact force can be applied to the coating object by the striking mechanism with respect to the medium coating object drawn from the medium layer in the container by the drawing process, the medium adhering to the surface of the coating object Can be effectively removed by impact and dropped into the container. Therefore, a separate process for removing the adhering medium from the object to be coated on which the coating film has been formed and a process for collecting the medium that has fallen and scattered outside are no longer necessary.

  Another characteristic configuration of the coating film forming method according to the present invention is that the striking step is continuously performed during the drawing step.

  With this configuration, while the object to be painted is pulled out from the medium layer in the container by the drawing process, a lateral impact force is continuously applied to the object to be coated, so that it adheres to the surface of the object to be painted. The medium that is present is effectively washed off by a number of fluid media located around the object to be coated on the surface of the media layer.

It is explanatory drawing which shows the coating-film formation apparatus and coating-film formation method by this invention.

EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated, referring drawings.
A coating film forming apparatus 20 shown in FIG. 1A vibrates a coating object C via a generally cylindrical vibrating container 2 connected to a vibrator V, a wire 4 (an example of a cord-like body), and the like. A block-like suspension body 5 suspended in the container 2 is provided. The vibrator V gives vibration components in the X-axis and Y-axis directions mainly along the horizontal plane to the vibrating container 2. A large number of steel balls B (an example of a transfer medium) coated with an uncured adhesive or a coating film as a coating film forming material are charged into the vibrating container 2, and the vibrating container 2 is vibrated by the vibrator V. Then, the adhesive or coating film of the steel ball B is transferred to the surface of the object to be coated C. Here, a long channel member is assumed as the coating object C.

  The greatest feature of the coating film forming apparatus 20 according to the present invention is that a discharge port 2D (an example of a drawing mechanism) of the steel ball B is provided at the lower end of the vibration container 2, and a lateral impact force on the suspension body 5. A hammer portion 8 (an example of a striking mechanism) is provided. The vibrating container 2 has a funnel-shaped bottom, and a discharge port 2D is provided at the lower end of the funnel so as to be opened and closed by a shutter 3. The discharge port 2D is basically disposed at the center of the bottom in plan view.

  That is, first, as shown in FIG. 1A, the coating object C is suspended from the vibrating container 2 by the wire 4 (installation process). Next, as shown in FIG. 1B, a large number of steel balls B are vibrated with the discharge port 2D closed by the shutter 3 so that the entire length of the coating object C is buried in the layer of the steel balls B. The container 2 is charged (charging process). Subsequently, the vibrating container 2 is vibrated with the vibrator V for a certain time (several seconds or the like) (vibration process). At this stage, the adhesive or the coating film is transferred from the part of the steel balls B to the surface of the object to be coated C.

  Next, as shown in FIG. 1 (c), this time, the discharge port 2 </ b> D is opened, and the vibrating container 2 is again vibrated by the vibrator V, while the impact force generated by the hammer portion 8 against the suspension body 5. Is added continuously. The hammer unit 8 strikes the suspension body 5 at a predetermined frequency (for example, once / second) mainly from the X-axis or Y-axis direction along the horizontal plane. Then, in parallel with the phenomenon in which the adhesive or coating film of the steel ball B is transferred, the steel ball B in the vibrating container 2 is discharged from the discharge port 2D at a constant speed. As the surface of the steel ball B in the vibrating container 2 descends as the steel ball B is discharged, the coating object C formed with a coating film is gradually exposed (drawing step).

  While the steel ball B is being discharged, the impact (blowing process) by the hammer portion 8 is also continuously performed in parallel, so that the impact is transmitted to the painting object C via the wire 4 and the coating object C The steel ball B adhering to the surface is effectively removed, and the coating object C is exposed while falling onto the surrounding steel ball B layer.

  At the moment when the impact from the hammer portion 8 is transmitted to the coating object C, it is predicted that the coating object C will move finely in the layer of the steel ball B. A mechanism is conceivable in which a large number of steel balls B present around the coating object C wash away the steel balls B adhering to the surface of the coating object C. Note that the suspension body 5 may be supported on a building or the like via an elastic member such as a coil spring 6 so that the impact of the hammer portion 8 is effectively transmitted to the coating object C.

  Incidentally, if the striking process by the hammer portion 8 is not carried out, the coating object C is exposed from the layer of the steel balls B with many steel balls B attached to the surface, so that the steel balls B are removed. Another process is required.

  The steel balls B discharged from the discharge port 2D are collected in the collection container 10. The recovered steel balls B are appropriately sent to a cleaning step or a regeneration step for newly carrying a pressure-sensitive adhesive or coating film according to the remaining amount of the pressure-sensitive adhesive or coating film.

  In the installation process, the coating object C may basically be suspended from the center of the vibrating container 2 in plan view. Since the steel ball B positioned in the vicinity of the vertical axis passing through the center where the discharge port 2D is located is discharged most quickly, the vibration is particularly generated when the coating object C has a non-rotationally symmetric cross-sectional shape such as a channel material. If suspended from the center of the container 2, the tendency of the steel ball B (medium) to stay on the inner surface side of the object to be coated C is suppressed, which is convenient.

In general, for a single coating object C, first, a preliminary process of transferring the adhesive layer onto the surface of the coating object C is performed using a steel ball B coated with the adhesive layer. Then, a main coating process is performed in which the paint layer is transferred to the pressure-sensitive adhesive layer formed on the surface of the object to be coated C in the preliminary process using the steel balls B coated with the paint.
These preliminary steps and the main coating step may be repeated a plurality of times depending on the state of adhesion of the pressure-sensitive adhesive layer or the paint layer and the purpose of treatment.

[Another embodiment]
<1> Instead of the drawing mechanism by discharging the medium from the discharge port, a pulling device that pulls the coating object upward from the medium layer via the wire 4 may be provided. The effect of removing the adhering medium from the object to be coated can be obtained in the same manner by applying a lateral impact force through the suspension portion by the striking mechanism while pulling up the object to be painted by the lifting device.

<2> During the discharging process of the steel ball B or the process of drawing the coating object C by the lifting device, the coating object C is generally placed on the surrounding steel ball B layer via the suspended wire 4. An elevating operation mechanism that repeatedly elevates along the Z axis perpendicular to the XY plane may be provided. By this raising / lowering operation, the phenomenon that the steel balls B are clogged on the inner surface of the coating object C, such as a tubular shape, is prevented from flowing. As a result, the steel ball B that easily adheres to the inner surface of the coating object C such as a tubular shape or a bowl shape can be effectively removed. As the raising / lowering operation mechanism, a hoisting device for reciprocating the wire 4, the suspension body 5, or the coil spring 6 up and down may be provided above the wire 4. Alternatively, the elastic coefficient of the coil spring 6 may be set so that continuous vertical vibration of the coating object C occurs naturally.

<3> It is also possible to provide a mechanism for changing the substantial inner diameter of the discharge port 2D for the purpose of controlling the discharge speed of the steel ball B that affects the formation of the coating film.

<4> A control unit that adjusts the ON / OFF control, vibration frequency, amplitude, and the like of the vibrator V according to the characteristics of the coating object C and the steel ball B may be provided. Further, a detection means for detecting the discharge speed of the steel ball B discharged from the discharge port 2D and the presence or absence of discharge is provided, and the control unit detects the opening degree and vibration of the discharge port 2D based on the detection result of the detection means. You may comprise so that N / OFF of the device V, a frequency, an amplitude, etc. may be controlled.

<5> The coating object C may be suspended using an elastic body such as a leaf spring instead of a cord-like body such as the wire 4. Alternatively, the object to be coated C may be suspended using a rod-shaped rigid body. In this case, the object C to be painted is attached to the side of the vibrating container 2 by the vibrator V with the steel ball B attached thereto. It is pulled out from the media layer while being removed by the shaking component.

  Coating film formation comprising a container capable of charging a large number of media coated with a film forming material, a suspension part for suspending an object to be coated in the container, and a vibrator for vibrating the entire container The apparatus can be used as a technique for improving the apparatus so that the process of removing the adhering medium from the object to be coated that has completed the formation of the coating film is unnecessary.

B Steel ball (transfer medium, coating film forming material)
C Object to be painted V Exciter 2 Vibratory container 2D Discharge port (drawing mechanism)
4 wire (cord)
5 Suspended body 6 Spring 8 Hammer part (blow mechanism)
20 Coating film forming device

Claims (6)

A container capable of charging a large number of media coated with a film-forming material;
A suspension part for suspending a coating object in the container;
A vibrator that vibrates the entire container;
A drawing mechanism for pulling out the object to be coated from the medium layer in the container being vibrated by the vibrator;
A coating film forming apparatus comprising: a striking mechanism that applies a lateral impact force to the painting object via the suspension when the painting object is drawn from the medium layer in the container by the drawing mechanism .   The coating film forming apparatus according to claim 1, wherein the striking mechanism is configured to continuously apply the impact force during a pulling operation by the pulling mechanism.   The coating film forming apparatus according to claim 1 or 2, wherein the medium is discharged from a discharge port provided at a bottom portion of the container as the drawing mechanism, and thereby the object to be coated is pulled out from the medium layer.   The coating film formation apparatus as described in any one of Claim 1 to 3 with which the raising / lowering operation mechanism which moves the said coating target object up and down repeatedly is provided. An installation process for installing a suspended painting object in a container;
A charging step of charging the container with a large number of media coated with a film-forming material and burying the object to be coated in the medium layer;
A vibration process for vibrating the container;
A drawing step of drawing out the coating object from the medium layer at a predetermined speed during the vibration step;
A coating film forming method comprising: a striking step of applying a lateral impact force to the coating object when the coating object is pulled out of the medium layer by the drawing process .   The coating film forming method according to claim 5, wherein the striking step is continuously performed during the drawing step.

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