JP2009136780A - Adhesive dip coating apparatus and adhesive dip coating method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an adhesive dip coating apparatus capable of eliminating liquid stagnation and suppressing coating unevenness while keeping a sufficient coating thickness when applying an adhesive to a work by dipping, and to provide an adhesive dip coating method. <P>SOLUTION: After a work W is transported to a first undercoating bath 21 and coated with an adhesive S by dipping, the work W is transported to a drying chamber 40 to dry the adhesive S and the work W undercoated in the first undercoating bath 21 is transported to a second undercoating bath 22 and coated with the adhesive S and thereafter, the work W is transported to the drying chamber 40 to dry the adhesive S to carry out undercoating with the adhesive S. Further, after the work W undercoated in the second undercoating bath 22 is transported to a first top coating bath 23 and coated with the adhesive S by dipping, the work W is transported to the drying chamber 40 to dry the adhesive S and the work W top-coated in the first top coating bath 23 is transported to a second top coating bath 24 and coated with the adhesive S and thereafter, the work W is transported to the drying chamber 40 to dry the adhesive S to carry out top coating with the adhesive S. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an adhesive dip coating apparatus and an adhesive dip coating method for applying an adhesive to a workpiece by immersion.

2. Description of the Related Art Conventionally, an adhesive is applied to a surface of a work as a machine part covered with rubber in order to improve adhesion to rubber. This adhesive consists of a first liquid for undercoating and a second liquid for overcoating. After the first liquid is applied to the work by immersion and dried, the second liquid is applied by immersion and dried. Vulcanization is performed by covering rubber (see, for example, Patent Documents 1 to 6).
JP 2006-314933 A JP-A-5-185001 Japanese Patent Laid-Open No. 5-185002 JP-A-5-269417 Japanese Utility Model Publication No. 2-125778 Japanese Patent No. 3107902

  Here, in applying the adhesive to the workpiece by dipping, it is important not to cause coating unevenness on the surface of the workpiece. As a main cause of such coating unevenness, a liquid pool is known in which the adhesive partially accumulates on the surface of the workpiece pulled up from the liquid level of the adhesive tank and the coating thickness becomes non-uniform. When such a liquid pool occurs, there is a problem that the work surface is partially dried insufficiently and the adhesive force with rubber is reduced.

  The present invention has been made in view of such points, and its purpose is to eliminate liquid pool and suppress coating unevenness while securing a sufficient film thickness when an adhesive is applied to a workpiece by dipping. Another object is to provide an adhesive dip coating apparatus and an adhesive dip coating method.

  In order to achieve the above-described object, according to the present invention, when the adhesive is applied to the workpiece by dipping, the undercoating operation and the overcoating operation are each performed twice.

  Specifically, the present invention is directed to an adhesive dip coating apparatus for immersing and applying a workpiece in an adhesive, and has taken the following solutions.

That is, the invention of claim 1 is a conveying means for holding the workpiece and conveying it downstream in the conveying direction;
An adhesive tank that is disposed on the transport path of the transport means and stores an adhesive for immersing the workpiece;
A drying unit disposed on a transport path of the transport unit and above the adhesive tank, and drying the workpiece;
The adhesive tank includes first and second undercoat tanks in which an undercoat adhesive is stored, and first and second overcoat tanks in which an overcoat adhesive is stored, and each undercoat tank. And the overcoat tank are disposed in order toward the downstream side in the conveying direction of the workpiece,
The conveying means is
After transporting the work to the first undercoating tank and applying the adhesive by dipping, the work is transported to the drying means to dry the adhesive,
After transporting the workpiece undercoated in the first undercoating tank to the second undercoating tank and applying the adhesive by dipping, the adhesive is transported to the drying means and dried.
After transporting the workpiece undercoated in the second undercoating tank to the first overcoating tank and applying the adhesive by dipping, the adhesive is transported to the drying means and dried.
The workpiece coated in the first overcoating tank is transported to the second overcoating tank and the adhesive is applied by dipping, and then transported to the drying means to dry the adhesive. It is characterized by.

  According to the first aspect of the invention, the work of undercoating the adhesive on the workpiece using the first and second undercoating tanks is performed in two steps, and further, using the first and second overcoating tanks. Since the work of overcoating the workpiece with the adhesive is performed in two steps, the thickness of the adhesive can be sufficiently ensured as compared with the case where the undercoating operation and the overcoating operation are each performed only once.

  Also, if the undercoating operation and the overcoating operation are each performed twice, the adhesive film to be applied in one application operation can be thin, so that the adhesive to be stored in each adhesive tank It is possible to prepare a thinner component concentration. That is, it is possible to prevent the adhesive from being partially accumulated on the surface of the work and to prevent the coating thickness from becoming nonuniform, and it is possible to suppress the deterioration of product quality due to the liquid pool.

The invention of claim 2 is the invention according to claim 1,
The conveying means is configured to convey the work to the drying means before conveying the work to the first undercoating tank, thereby preheating the work.

  According to the invention of claim 2, since the work is preheated before being transferred to the first undercoating tank, the preheating is performed when the work is transferred to the first undercoating tank and the adhesive is applied. Since the drying of the adhesive is promoted by this, it is possible to suppress the occurrence of liquid pool on the workpiece surface.

The invention of claim 3 is the invention according to claim 1 or 2,
The adhesive tank has an adhesive main tank in which the workpiece is immersed, and an adhesive preliminary tank juxtaposed with the adhesive main tank,
The adhesive preliminary tank is provided with a cooling pipe for cooling the adhesive stored by circulating cooling water,
The adhesive main tank and the adhesive preliminary tank are connected to each other through a circulating means for circulating the adhesive stored in the adhesive preliminary tank to the adhesive main tank side. is there.

  According to the invention of claim 3, the temperature of the adhesive stored in the adhesive preliminary tank is cooled by cooling water, and the temperature-adjusted adhesive is circulated to the main adhesive tank by the circulation means. Therefore, the temperature of the adhesive stored in the adhesive main tank can be adjusted, and the adhesive consumed in the application work can be replenished to keep the liquid level of the adhesive main tank constant. it can.

  Specifically, when the workpiece is heated to promote drying of the adhesive applied to the workpiece, and the heated workpiece is immersed in the main adhesive tank, the adhesive stored in the main adhesive tank The temperature of the adhesive may increase and the characteristics of the adhesive may change, but if the temperature-adjusted adhesive is supplied to the adhesive main tank, the adhesive main tank should be kept at the optimum temperature. Can do.

The invention of claim 4 is the invention according to claim 3,
The circulating means is configured to flow the adhesive from the bottom of the adhesive main tank toward the liquid surface.

  According to the invention according to claim 4, since the adhesive is caused to flow from the bottom of the adhesive main tank toward the liquid surface by the circulation means, the adhesive stored in the adhesive main tank is stirred. It can suppress that the component of an adhesive isolate | separates and settles in the bottom part of an adhesive main tank.

Invention of Claim 5 in any one of Claims 1 thru | or 4,
An immersion position on the conveyance path for immersing the workpiece in the adhesive in the adhesive tank, and a retreat position outside the conveyance path for allowing the workpiece to pass above the liquid level of the adhesive. Elevating means for moving up and down,
The lifting / lowering means is configured to move the adhesive tank from the dipping position to the retracted position after a lapse of a predetermined time after the conveying operation of the conveying means is stopped.

  According to the invention of claim 5, since the adhesive tank is moved from the dipping position to the retracted position after the elapse of a predetermined time after the conveying operation of the conveying means is stopped by the elevating means, the adhesion applied to the workpiece It can suppress that an agent melt | dissolves in an adhesive agent tank. That is, if the work is left in a state where the work is immersed in the adhesive tank in the case of an emergency stop or the like, the adhesive already applied to the work may melt, Then, after the conveyance operation of the conveyance means is stopped, the workpiece can be pulled out before the adhesive applied to the workpiece melts by removing the workpiece from the adhesive tank after a predetermined time has elapsed.

  The invention of claim 6 is directed to an adhesive dip coating method for immersing and applying a work in an adhesive, and has taken the following solution.

That is, the invention of claim 6 is a first undercoating step in which the work is immersed in an adhesive for undercoating and undercoating, and then the adhesive is dried.
A second undercoating step of drying the adhesive after the undercoating is further performed by immersing the workpiece undercoated in the first undercoating step;
A first overcoating step of drying the adhesive after immersing the workpiece undercoated in the second undercoating step in an adhesive for overcoating and overcoating;
And a second top coating step of drying the adhesive after the top coating is dipped in an adhesive for top coating and further overcoated.

  According to the invention of claim 6, the work of undercoating the adhesive on the work is performed in two parts, and the work of overcoating the adhesive on the work is performed in two parts. In addition, the thickness of the adhesive can be sufficiently ensured as compared with the case where the top coating operation is performed only once.

  In addition, if the undercoating operation and the overcoating operation are performed in two steps, the film thickness of the adhesive applied in one application operation can be reduced, so that the component concentration of the adhesive used is made thinner. Can be blended. That is, it is possible to prevent the adhesive from being partially accumulated on the surface of the work and to prevent the coating thickness from becoming nonuniform, and it is possible to suppress the deterioration of product quality due to the liquid pool.

  Thus, according to the present invention, the work of undercoating the adhesive on the workpiece using the first and second undercoat tanks is performed in two steps, and further, using the first and second overcoat tanks. Since the work of overcoating the workpiece with the adhesive is performed in two steps, the thickness of the adhesive can be sufficiently ensured as compared with the case where the undercoating operation and the overcoating operation are each performed only once.

  Also, if the undercoating operation and the overcoating operation are each performed twice, the adhesive film to be applied in one application operation can be thin, so that the adhesive to be stored in each adhesive tank It is possible to prepare a thinner component concentration. That is, it is possible to prevent the adhesive from being partially accumulated on the surface of the work and to prevent the coating thickness from becoming nonuniform, and it is possible to suppress the deterioration of product quality due to the liquid pool.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature and is not intended to limit the present invention, its application, or its use.

<Device configuration>
FIG. 1 is a front view showing a configuration of an adhesive dip coating apparatus according to an embodiment of the present invention. As shown in FIG. 1, the adhesive dip coating apparatus 1 includes a workpiece supply unit 5 that supplies a workpiece W, and a conveyance that holds the workpiece W supplied by the workpiece supply unit 5 and conveys the workpiece W downstream in the conveyance direction. Part 10, adhesive tank 20 in which adhesive S for immersing workpiece W is stored, drying chamber 40 (drying means) for drying workpiece W, and workpiece W after application of adhesive S is collected And a workpiece collection unit 50 for carrying out the process.

  The adhesive dip coating apparatus 1 has a main body portion 3 configured by combining a main body frame 2, and the main body portion 3 includes an upper drying chamber 40 and a lower storage chamber 4 by an intermediate frame 2a extending in the horizontal direction. It is divided into. In the storage chamber 4, an adhesive tank 20 and a work collection unit 50 are disposed.

  The workpiece supply unit 5 accommodates a plurality of workpieces W, aligns them one by one, is positioned at a workpiece supply position on the conveyance path, and supplies the workpiece W to the conveyance unit 10. 1 is disposed on the left side in FIG. A control box 6 for controlling the operation of the apparatus is disposed on the right side of the storage chamber 4.

  The said conveyance part 10 hold | maintains the workpiece | work W supplied by the workpiece | work supply part 5, and conveys it to the downstream of a conveyance direction, The several rollers 11a-11e arrange | positioned in the main-body part 3, and each A conveyance belt 12 wound around rollers 11a to 11e and a holding unit 15 attached to the conveyance belt 12 and holding the workpiece W are provided.

  The plurality of rollers 11a to 11e includes a drying position roller 11a disposed at an upper position in the drying chamber 40, an adhesion position roller 11b disposed at an upper position of the adhesive tank 20 in the storage chamber 4, A driving roller 11c that rotates the conveyor belt 12, a tension roller 11d that applies tension to the conveyor belt 12, and a lower conveyor roller 11e disposed at both ends in the width direction at a lower position in the storage chamber 4. Yes.

  FIG. 2 is a front view showing the configuration of the holding unit, and FIG. 3 is a side view showing the configuration of the holding unit. As shown in FIGS. 2 and 3, the holding unit 15 holds the half-cylindrical workpiece W so that the arc portion faces upward, and moves with the rotation of the conveyance belt 12, and moves the workpiece W in the conveyance direction. The holding bar 16 that holds the workpiece W, the guide bar 17 disposed at both ends of the holding bar 16, and the holding main body 18 to which the holding bar 16 and the guide bar 17 are attached. And a support shaft 19 that supports the holding body 18 on the conveyor belt 12.

  The holding bar 16 has an upper end attached to the holding body 18 and a lower end bent at a right angle in the left direction in FIG. 2 to form a horizontal portion 16a for holding the workpiece W. The front end portion of the horizontal portion 16a is bent obliquely upward so that the workpiece W does not leave the horizontal portion 16a. A total of eight holding bars 16 are arranged at intervals in the width direction of the holding main body 18.

  The guide bar 17 is disposed between the holding bars 16 so that the eight holding bars 16 are in groups of two. That is, the guide bar 17 is disposed so that the work W is held by the two holding bars 16 and the work W is not detached from both ends of the two holding bars 16. Specifically, the upper end of the guide bar 17 is attached to the holding main body 18, and in FIG. 2, the guide bar 17 is bent in a “reverse shape” from the upper end to the lower end, and the lower end overlaps the workpiece W. It is arranged.

  Further, the holding bar 16 and the guide bar 17 are formed in a diamond shape in cross section, and the workpiece W is held or guided at the apex of the diamond. Thereby, the contact area between the holding bar 16 and the guide bar 17 and the workpiece W can be reduced, and when the workpiece W is immersed in the adhesive tank 20, the adhesive S is evenly immersed in the entire surface of the workpiece W. Therefore, it is preferable.

  A plurality of the holding portions 15 are attached at a predetermined interval in the circumferential direction of the conveyor belt 12 so that the operation of applying the adhesive S to the workpiece W can be performed continuously.

  As shown in FIG. 1, the adhesive tank 20 is disposed on the conveyance path of the conveyance unit 10 and is used for storing an adhesive S for immersing the workpiece W, and includes a total of four adhesives. It consists of a tank. Specifically, from the upstream side in the transport direction, a first undercoat tank 21 and a second undercoat tank 22 in which an undercoat adhesive S is stored, and a first overcoat in which an overcoat adhesive S is stored. The tank 23 and the second topcoat tank 24 are sequentially arranged toward the downstream side in the transport direction.

  Thus, in the present invention, the work of undercoating the adhesive S on the workpiece W using the first and second undercoat tanks 21 and 22 is performed in two steps, and the first and second overcoat tanks are further performed. Since the work of overcoating the adhesive S on the workpiece W using 23 and 24 is performed in two steps, the film thickness S of the adhesive is compared with the case where the undercoating work and the overcoating work are each performed only once. Can be secured sufficiently.

  Further, if the undercoating operation and the overcoating operation are performed in two steps, the film thickness of the adhesive S to be applied in one application operation can be reduced, so that it is stored in each adhesive tank 20. The component density | concentration of the adhesive agent S can be prepared thinly. That is, it is possible to prevent the adhesive S from being partially accumulated on the surface of the workpiece W and to prevent the coating thickness from becoming uneven, and it is possible to suppress the deterioration of product quality due to the liquid pool.

  The first and second undercoat tanks 21 and 22 are placed on a mounting table 25, and the first and second overcoat tanks 23 and 24 are different from the first and second undercoat tanks 21 and 22. It is mounted on the mounting table 25. An elevating part 26 for moving the adhesive tank 20 up and down is attached to the lower surfaces of the mounting tables 25 and 25.

  Here, the difference between the first and second undercoat tanks 21 and 22 and the first and second topcoat tanks 23 and 24 is only the component concentration of the stored adhesive S. Only one adhesive tank 20 will be described.

  FIG. 4 is a front view showing the configuration of the adhesive tank, and FIG. 5 is a side view showing the configuration of the adhesive tank. As shown in FIGS. 4 and 5, the adhesive tank 20 includes an adhesive main tank 30 in which the workpiece W is immersed, and an adhesive preliminary tank 35 provided in parallel with the adhesive main tank 30.

  The adhesive main tank 30 is disposed on the transport path of the work W, and is used for immersing the work W transported by the transport unit 10 to apply the adhesive S, and the bottom portion has an inverted trapezoidal shape. Is formed. A jet pipe 31 having both ends bent downward is attached to the bottom of the adhesive main tank 30.

  Further, both ends of the ejection pipe 31 are connected to an inflow pipe 39 of a circulation pump 37 (circulation means) described later, and the adhesive S in the adhesive preliminary tank 35 circulated from the circulation pump 37 is connected to the pipe. It ejects from a plurality of ejection holes 32, 32,. Specifically, the ejection holes 32 are opened so as to mainly extend from the lower part of the outer peripheral surface of the pipe to both sides in the width direction, and the adhesive S circulated from the circulation pump 37 is liquid from the bottom of the adhesive main tank 30. It is designed to flow toward the surface. Thereby, the adhesive S stored in the adhesive main tank 30 is agitated, and the components of the adhesive S can be prevented from being separated and precipitated at the bottom of the adhesive main tank 30.

  Further, a guide plate 33 for slightly raising the liquid level of the adhesive S is provided on the upper side wall of the adhesive main tank 30 and between the adhesive preliminary tank 35. In addition, a guide nozzle 34 is provided that surrounds the guide plate 33 and protrudes toward the adhesive preliminary tank 35 and feeds the adhesive S over the guide plate 33 and overflowing from the main adhesive tank 30 to the adhesive preliminary tank 35 side. Yes.

  With this configuration, the amount of the adhesive S supplied from the ejection pipe 31 to the adhesive main tank 30 is set to be large, and the adhesive S flows from the bottom of the adhesive main tank 30 toward the liquid level. This is more advantageous in preventing the components of the adhesive S from separating and precipitating on the bottom of the adhesive main tank 30.

  The adhesive preliminary tank 35 is arranged in parallel with the main adhesive tank 30 at a position off the transport path of the workpiece W. A cooling pipe 36 for cooling the adhesive S stored by circulating cooling water is disposed in the adhesive preliminary tank 35. One end of the cooling pipe 36 is connected to the upper part of the side wall of the adhesive preliminary tank 35 so that cooling water is supplied from the outside. The cooling pipe 36 is spirally wound along the inner peripheral surface of the side wall of the adhesive preliminary tank 35, and the other end of the cooling pipe 36 is bent upward near the bottom of the adhesive preliminary tank 35. It is connected to the upper part of the side wall and drains the cooling water to the outside. With such a configuration, the temperature of the adhesive S stored in the adhesive preliminary tank 35 can be adjusted by circulating the cooling water through the cooling pipe 36.

  A circulation pump 37 for circulating the adhesive S in the adhesive preliminary tank 35 to the main adhesive tank 30 is disposed on the left side of the adhesive preliminary tank 35 in FIG. The circulation pump 37 is connected to an outflow pipe 38 connected to the lower part of the side wall of the adhesive preliminary tank 35, and to an inflow pipe 39 connected to the ejection pipe 31 of the adhesive main tank 30. Thereby, the adhesive S stored in the adhesive preliminary tank 35 can be circulated to the adhesive main tank 30 via the circulation pump 37.

  With such a configuration, the temperature of the adhesive S stored in the adhesive main tank 30 can be adjusted, and the adhesive S consumed in the application work can be replenished and the liquid in the adhesive main tank 30 can be supplied. The surface can be kept constant. Specifically, when the workpiece W is heated in the drying chamber 40 in order to promote the drying of the adhesive S applied to the workpiece W, and the heated workpiece W is immersed in the adhesive main tank 30, the bonding is performed. Although the temperature of the adhesive S stored in the main agent tank 30 may rise and the characteristics of the adhesive S may change, the adhesive S whose temperature has been adjusted in the auxiliary adhesive tank 35 is transferred to the main adhesive agent tank 30. If supplied, the adhesive main tank 30 can be maintained at an optimum temperature.

  The main adhesive tank 30 and the preliminary adhesive tank 35 are moved up and down by an elevating unit 26 attached to the lower surface of the mounting table 25. The elevating part 26 can be composed of, for example, an air cylinder, a hydraulic cylinder, etc., and the immersion main tank 30 is immersed on the conveyance path for immersing the work W in the adhesive S in the adhesive main tank 30. It is configured to move up and down to a position and a retreat position outside the conveyance path for allowing the workpiece W to pass above the liquid surface of the adhesive S.

  With such a configuration, for example, the adhesive applied to the workpiece W is moved by moving the main adhesive tank from the dipping position to the retracted position after a lapse of a predetermined time after the conveyance operation of the conveyance unit 10 is stopped. It can suppress that the agent S melt | dissolves in the adhesive main tank 30. FIG. That is, if the work W is left immersed in the main adhesive tank 30 when the apparatus is stopped urgently, the adhesive S already applied to the work W may be melted. However, in the present invention, after the transport operation of the transport unit 10 is stopped, the work W is taken out from the main adhesive tank 30 after a predetermined time has elapsed, before the adhesive S applied to the work W is melted. The workpiece W can be pulled up.

  As shown in FIG. 1, the drying chamber 40 is for heating the workpiece W coated with the adhesive S by dipping in the adhesive tank 20 to dry the adhesive S, and uses hot air for drying. A heater 41 to be generated and a circulation duct 42 for circulating hot air in the drying chamber 40 are provided.

  The drying chamber 40 is provided on the conveyance path of the workpiece W, and dries the adhesive S applied to the workpiece W in the second undercoat tank 22 and the first and second overcoat tanks 23 and 24. Of course, the workpiece W is preheated before it is transported to the first undercoat tank 21. In this way, when the workpiece W is transported to the first undercoating tank 21 and the adhesive S is applied, the drying of the adhesive S is promoted by preheating, so that a liquid pool is prevented from being generated on the surface of the workpiece W. it can.

  FIG. 6 is a view taken in the direction of arrow A in FIG. 1 showing the configuration of the workpiece collection unit. As shown in FIG. 6, the work collection unit 50 is discharged by the discharge unit 51 that catches and discharges the work W held by the holding unit 15, the storage box 52 that stores the work W, and the discharge unit 51. And an inclined plate 53 that slides and conveys the workpiece W to the storage box 52.

  The discharge unit 51 slides the discharge claw 51a whose ends are branched so that the holding bar 16 and the guide bar 17 pass when the holding unit 15 descends, and the workpiece W collected by the discharge claw 51a to the inclined plate 53. And a transport plate 51b for transporting.

  When the holding portion 15 passes through the discharge portion 51, the holding bar 16 and the guide bar 17 pass through the gap between the discharge claws 51a, but the workpiece W is caught without being able to pass through the discharge claws 51a. It slides down on the plate 51 b and is conveyed to the inclined plate 53. Further, the work W slides down on the inclined plate 53 so that the work W is accommodated in the accommodation box 52.

  In the present embodiment, the workpiece W collected by the discharge unit 51 is accommodated in the accommodation box 52 by sliding on the inclined plate 53, but the workpiece W is forcibly accommodated using a transport belt or the like. You may make it convey to 52.

<Processing procedure of adhesive dip coating method>
Next, the processing procedure of the adhesive dip coating method using the above-described adhesive dip coating apparatus 1 will be described. First, as shown in FIG. 1, the work belt 12 of the transport unit 10 is rotationally driven in the transport direction to move the holding unit 15 and pass the work supply position of the work supply unit 5, thereby holding the work W by the holding bar. Hook at 16 and hold.

  Next, the workpiece W is conveyed into the drying chamber 40 and preheated to the workpiece W. The pre-heated work W is conveyed to the first undercoating tank 21 and the adhesive S is applied by dipping. Then, the workpiece | work W is conveyed to the drying chamber 40, and the adhesive agent S apply | coated to the workpiece | work W surface is dried.

  And the workpiece | work W primed by the 1st undercoat tank 21 is conveyed to the 2nd undercoat tank 22, and the adhesive agent S is apply | coated by immersion. Thereafter, the adhesive that is conveyed to the drying chamber 40 and applied to the surface of the workpiece W is dried.

  Next, the workpiece W undercoated in the second undercoating tank 22 is conveyed to the first overcoating tank 23 and the adhesive S is applied by dipping. Thereafter, the adhesive S is transported to the drying chamber 40 and dried.

  And the workpiece | work W overcoated with the 1st topcoat tank 23 is conveyed to the 2nd topcoat tank 24, and the adhesive agent S is apply | coated by immersion. Thereafter, the adhesive S is transported to the drying chamber 40 and dried.

  Next, the work W on which the application work of the adhesive S has been completed is transported to the work collection unit 50, and the holding unit 15 that holds the work W is passed through the gap between the discharge claws 51 a of the discharge unit 51. It is collected by being caught by the discharge claw 51 a and stored in the storage box 52.

  As described above, according to the adhesive dip coating apparatus 1 according to the present embodiment, the work of undercoating the adhesive S on the work W is performed in two steps, and the work of applying the adhesive S to the work W is further performed. Therefore, the film thickness of the adhesive S can be sufficiently secured as compared with the case where the undercoating operation and the overcoating operation are each performed only once.

  Further, if the undercoating operation and the overcoating operation are performed in two steps, the film thickness of the adhesive S applied in one application operation can be reduced, so the component concentration of the adhesive S to be used can be reduced. Can be formulated thinly. That is, it is possible to prevent the adhesive S from being partially accumulated on the surface of the workpiece W and to prevent the coating thickness from becoming uneven, and it is possible to suppress the deterioration of product quality due to the liquid pool.

  As described above, the present invention provides an adhesive dip coating apparatus that can eliminate coating of liquid and suppress coating unevenness while securing a sufficient film thickness when applying an adhesive to a workpiece by immersion. Since a highly practical effect that an adhesive dip coating method can be provided is obtained, it is extremely useful and has high industrial applicability.

It is a front view which shows the structure of the adhesive agent dip coating apparatus which concerns on embodiment of this invention. It is a front view which shows the structure of a holding | maintenance part. It is a side view which shows the structure of a holding | maintenance part. It is a front view which shows the structure of an adhesive agent tank. It is a side view which shows the structure of an adhesive agent tank. It is A arrow directional view of FIG. 1 which shows the structure of a workpiece | work collection | recovery part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Adhesive immersion coating apparatus 10 Conveyance part (conveyance means)
DESCRIPTION OF SYMBOLS 20 Adhesive tank 21 1st undercoat tank 22 2nd undercoat tank 23 1st topcoat tank 24 2nd topcoat tank 26 Lifting part (lifting means)
30 Adhesive main tank 35 Adhesive preliminary tank 36 Cooling pipe 37 Circulation pump (circulation means)
40 Drying room (drying means)
W Work S Adhesive

Claims (6)

An adhesive dip coating apparatus for immersing and applying a work in an adhesive,
Conveying means for holding the workpiece and conveying it downstream in the conveying direction;
An adhesive tank that is disposed on the transport path of the transport means and stores an adhesive for immersing the workpiece;
A drying unit disposed on a transport path of the transport unit and above the adhesive tank, and drying the workpiece;
The adhesive tank includes first and second undercoat tanks in which an undercoat adhesive is stored, and first and second overcoat tanks in which an overcoat adhesive is stored, and each undercoat tank. And the overcoat tank are disposed in order toward the downstream side in the conveying direction of the workpiece,
The conveying means is
After transporting the work to the first undercoating tank and applying the adhesive by dipping, the work is transported to the drying means to dry the adhesive,
After transporting the workpiece undercoated in the first undercoating tank to the second undercoating tank and applying the adhesive by dipping, the adhesive is transported to the drying means and dried.
After transporting the workpiece undercoated in the second undercoating tank to the first overcoating tank and applying the adhesive by dipping, the adhesive is transported to the drying means and dried.
The workpiece coated in the first overcoating tank is transported to the second overcoating tank and the adhesive is applied by dipping, and then transported to the drying means to dry the adhesive. An adhesive dip coating apparatus. In claim 1,
The conveying means is configured to convey the work to the drying means before conveying the work to the first undercoating tank, and to apply preheating to the work. apparatus. In claim 1 or 2,
The adhesive tank has an adhesive main tank in which the workpiece is immersed, and an adhesive preliminary tank juxtaposed with the adhesive main tank,
The adhesive preliminary tank is provided with a cooling pipe for cooling the adhesive stored by circulating cooling water,
The adhesive main tank and the adhesive preliminary tank are connected to each other through a circulation means for circulating the adhesive stored in the adhesive preliminary tank to the main adhesive tank side. Immersion coating device. In claim 3,
The adhesive dip coating apparatus, wherein the circulation means is configured to flow the adhesive from the bottom of the adhesive main tank toward the liquid surface. In any one of Claims 1 thru | or 4,
An immersion position on the conveyance path for immersing the workpiece in the adhesive in the adhesive tank, and a retreat position outside the conveyance path for allowing the workpiece to pass above the liquid level of the adhesive. Elevating means for moving up and down,
The lifting / lowering means is configured to move the adhesive tank from the dipping position to the retracted position after a predetermined time has elapsed since the conveying operation of the conveying means is stopped. . An adhesive dip coating method for immersing and applying a work in an adhesive,
A first undercoating step in which the work is dipped in an undercoating adhesive, followed by undercoating, followed by drying the adhesive;
A second undercoating step of drying the adhesive after the undercoating is further performed by immersing the workpiece undercoated in the first undercoating step;
A first overcoating step of drying the adhesive after immersing the workpiece undercoated in the second undercoating step in an adhesive for overcoating and overcoating;
An adhesive dip coating method comprising: a second overcoating step of drying the adhesive after immersing the workpiece overcoated in the first overcoating step in an adhesive for overcoating and further overcoating. .

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