JPH062260B2 - Method for applying dry coagulating liquid agent - Google Patents

Description

The present invention relates to a method for automatically applying a dry and coagulable liquid agent such as an adhesive or a paint.

[Conventional technology]

In the manufacture of anti-vibration rubber bushes used in suspension systems for automobiles, it is necessary to apply an adhesive or paint to the surface of the parts during the process.

For this treatment, the coating work has conventionally been carried out by using a robot equipped with a spray gun or the like while rotating and transporting the coated object.

However, spray coating has a drawback in that the coating film tends to be non-uniform, and the paint and adhesive scatter to other than the object to be coated, resulting in a large loss and soiling of the surroundings.

Therefore, recently, application using a brush has been performed for this application work. That is, a paint or an adhesive is intermittently supplied to the brush, and the brush and the object to be coated are relatively moved to apply the brush. For example, while rotating the cylindrical object to be coated, the brush is applied to the outer periphery of the brush. There is a method of contacting and applying. As a method of intermittently supplying paint or adhesive to the brush, the brush may be immersed in the paint or adhesive, or a method of pumping the paint or adhesive through a tube into the brush intermittently is also known. ing.

However, since paints and adhesives have the property of drying and solidifying, if any trouble occurs, or if the coating work is temporarily stopped when changing the object to be coated or replenishing or replacing the adhesive etc., it will stop. As the drying progresses inside, the brush easily hardens with paint or adhesive. When the brush is used as it is and the application is resumed, coating unevenness such as fading occurs, and the coating unevenness cannot be eliminated unless application is continued for a considerable period of time, which causes a large decrease in the yield.

In addition, unevenness in coating may occur even when the interval between coatings is long due to reasons such as supply of the object to be treated.
The situation was the same as above.

[Problems to be Solved by the Invention]

In view of such conventional circumstances, the present invention is capable of causing coating unevenness even when the apparatus is stopped or the coating interval is extended in the case of automatically applying a dry and solidifying liquid agent such as a paint or an adhesive. It is an object of the present invention to provide a coating method capable of resuming or continuing coating without the use.

[Means for Solving the Problems]

In order to achieve the above object, in the present invention, using a brush to which a dry and coagulable liquid agent is intermittently supplied, in a method of automatically applying a dry and coagulable liquid agent to the surface of an object to be coated, application by a brush When a predetermined time has elapsed without being performed, the brush is pressed against a roller that is immersed in the solvent of the dry coagulating liquid agent for rotation for a period of time or longer, and then the dry coagulating liquid agent is supplied to the brush for application. It is characterized by restarting.

[Action]

The brush solidified by drying the liquid agent is dipped in a solvent that dissolves the liquid agent and pressed against a rotating roller, the coagulated liquid agent dissolves in the solvent held on the roller surface, and the brush is pressed against the roller. By being deformed and deformed, dissolution of the solidified solvent proceeds more easily, so that the brush can be returned to its original flexible state (brushed) in a short time.

The shape of the roller may be a smooth cylinder, but if the mountain-shaped convex part is gently formed on the surface of the roller, the amount of deformation of the brush changes intermittently, so it is possible to accelerate the dissolution of the solidified liquid agent. is there.

Since the speed of dry coagulation varies depending on the type of dry coagulant liquid such as paint or adhesive to be applied and the material of the brush, it is preferable to experimentally determine the timing of moving the brush to the roller, but usually the application is performed. It is necessary to move the brush to the roller and smooth the brush when several minutes (for example, 3 minutes) or more have passed without being removed. Also, the time required to smooth the brush with the roller varies depending on the type of dry coagulating liquid or solvent, the rotation speed of the roller, etc., so it is preferable to experimentally determine it, but usually it is several seconds (for example, 10 seconds) or more. Would be necessary.

〔Example〕

 An embodiment of the present invention will be described with reference to the drawings.

The illustrated coating apparatus is a vertical type in which an object to be processed 1 which is a cylindrical part used for a torsion damper pulley is held by a support tool 2 so that its axial direction is horizontal and intermittently moves in an elliptical shape on a vertical plane. Conveyor 3, a reversing arm 5 having another supporting tool capable of delivering the object 1 from the conveyor 3 by the pusher 4 in a state where the axial direction is horizontal, and the reversing arm 5 on the supporting tool 2 side and the opposite side. Along the vertical plane 1
When the arm drive device 6 that inverts 80 ° and moves the inversion arm 5 in the horizontal direction orthogonal to the inversion direction, and the inversion arm 5 supports the object 1 to be processed and is on the opposite side of the support tool 2 of the conveyor 3, A rotary drive device 7 including a rotary plate that abuts on one end of the object 1 to be horizontally moved by the arm drive device 6 and rotates the object 1 about a horizontal axis;
The surface of the object 1 to be processed, which is supported by the reversing arm 5 and is rotated by the rotation driving device 7, is provided with a brush 8 that descends from above and comes into contact with the surface of the object 1 to apply an adhesive. The object to be processed 1
It is also possible to form a drying oven for the adhesive by surrounding the conveyor 3 except for the delivery point and providing a heater inside.

The above-mentioned brush 8 is a bunch of animal hair and has a vertical appearance of 3
It is 0 mm x 8 mm wide x 25 mm high, and two are attached to apply different kinds of adhesive. The two brushes 8 are respectively supported by the tips of support arms 9 provided on both sides of the rotatable column 10 in the 180 ° direction so as to be vertically movable. A different type of adhesive is applied to each brush 8 from a separate adhesive container 18 through a nylon hose 19 having a diameter of 2 to 3 mm.
By opening and closing, it is possible to intermittently supply pressure.

Further, both brushes 8 can be moved up and down together with the support arm 9 by an air cylinder 11 provided on the column 10, and can be moved horizontally by an air cylinder 13 provided on each support arm 9. So each brush 8
Is on the coating side (rotation driving device 7 side), the rotation driving device 7 moves to the surface of the object 1 rotating around a horizontal axis and moves axially on the surface while making contact with the entire surface. The adhesive can be applied to.

Further, the column 10 is connected to a rotary actuator 12, and together with the support arm 9, the brush 8 can be horizontally rotated by 180 ° between the application side and the opposite brush leveling side. Two rollers 14 are installed side by side on the brush-cleaning side of the support column 10, and inside two solvent tanks 15 filled with two kinds of solvents corresponding to the two kinds of adhesives supplied to each brush 8. It is designed to be rotated by a motor while being immersed in each solvent. Also, two rollers 14 and a solvent layer 15
Can be moved horizontally by a drive device (not shown) and can be moved below the brushes 8 supported on the brush leveling side. Each roller 14 has a diameter of 100 mm and a length of 100
Made of mm metal, the surface is smooth and chrome-plated. Each solvent tank 15 is filled with a certain amount of solvent at all times so that each solvent flows from the tank 16 through a pipe to the valve 1
It is supplied intermittently by opening and closing 7.

Using the above-mentioned coating device, the coating treatment of the adhesive was continuously performed on the surfaces of the two types of cylindrical parts used for the torsion damper pulley. When 3 minutes have passed without applying the brush 8 to the object to be processed 1, the brush 8 is rotated from the application side to the brush leveling side, and the roller 14 is immersed in a corresponding solvent and rotates. 8 was pressed for 10 seconds or more to smooth the brush. For the brush 8 not used for coating, the brush 14 is continuously leveled during that time.

As a result, when the object 1 to be treated is rotated and another adhesive is applied, the other brush 8 can be used in a state where it is already sufficiently brushed, so that the application operation can be restarted immediately. Further, the coating operation was interrupted halfway to replenish the adhesive to the adhesive container 18, but when the interruption was continued for 3 minutes, the brush 8 used for coating was inverted to the brush leveling side, and the corresponding solvent was used. It was pressed against the roller 14 dipped in and brushed for 20 minutes until the application was resumed. When the application was resumed, the brush 8 was turned over to the application side again, and the adhesive was supplied, so that the adhesive could be immediately applied to the surface of the object 1 without uneven coating.

〔The invention's effect〕

According to the present invention, when applying a dry and solidifying liquid agent such as a paint or an adhesive, even if the apparatus is stopped longer or the application interval is extended as the liquid agent begins to dry and solidify, uneven coating occurs. The application can be resumed or continued without being made.

Therefore, it is possible to improve the work efficiency in the application of the dry coagulable liquid agent and significantly improve the yield, and it is extremely effective especially in an automated application apparatus.

[Brief description of drawings]

The drawing is a schematic perspective view showing a specific example of an apparatus for carrying out the method of the present invention. DESCRIPTION OF SYMBOLS 1 ... Object to be processed 2 ... Supporting device 3 ... Conveyor 4 ... Pusher 5 ... Reversing arm 6 ... Arm drive device 7 ... Rotation drive device 8 ... Brush 9 ... Support arm 10 ... Struts 11, 13 ... Air cylinder 12 ... Rotary actuator 14 Roller 15 Solvent tank 16 Solvent tank 17, 20 Valve 18 Adhesive container 19 Nylon hose

Claims (1)

[Claims] 1. A method of automatically applying a dry coagulating liquid agent to the surface of an object to be coated using a brush to which the dry coagulating liquid agent is intermittently supplied, is determined in advance without applying the brush. When the elapsed time has elapsed, the brush is pressed against the roller that is immersed in the solvent of the dry coagulating liquid agent for rotation for a predetermined time or more, and then the dry coagulating liquid agent is supplied to the brush to restart the application. A method for applying a dry coagulating liquid agent.