JP2020000971A - Sealer application device and ceramic member - Google Patents

Abstract

To prevent application failure of a sealer which is caused by wear of a nozzle.SOLUTION: A sealer application device 10 includes: a nozzle 11 having a discharge port 11a which discharges a sealer X; and a guide member 12. In the nozzle 11, a ceramic member 14 is integrally provided on a surface of a base material 13 at the side of the discharge port 11a. The ceramic member 14 forms a taper shape in which its thickness gradually reduces toward the side of the discharge port 11a.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a sealer coating device or a ceramic member.

  2. Description of the Related Art Conventionally, there is a panel member that forms a vehicle body, for example, a door panel formed by joining an inner panel and an outer panel. Then, after the inner panel and the outer panel are joined, a sealer for waterproofing and rustproofing is applied to a position where the inner panel and the outer panel are joined by a sealer application device.

  When the sealer is applied by the sealer applying device, the guide member for guiding the nozzle is brought into contact with the surface of the panel, whereby the discharge port of the nozzle can be appropriately positioned near the alignment position. . Then, in this state, the sealer is discharged while moving the nozzle along the alignment position, so that the sealer can be appropriately applied to the alignment position.

  At the time of the above application operation, the guide member slides on the surface of the panel, so the repeated application operation causes the guide member to wear and change its shape, making it impossible to properly position the nozzle. Would. As a countermeasure against such wear, for example, in Patent Document 1, the guide member is made of a metal material having excellent wear resistance.

JP 2007-283262 A

  Due to the repetitive coating operation by the sealer coating device, abrasion of the nozzle in addition to the above-mentioned guide member becomes a problem. That is, when the nozzle slides on the surface of the panel and is worn or deformed, the application state of the sealer changes, resulting in poor application.

  However, it is not always practical to form the entire member with a wear-resistant member as in Patent Literature 1 in terms of cost and the like.

  Under such circumstances, it is an object of the present invention to prevent coating defects due to abrasion of nozzles.

  In order to solve the above-mentioned problem, the present invention is a sealer coating apparatus including a nozzle having a discharge port for discharging a sealer, wherein the nozzle has at least the discharge port side integrally formed with a ceramic member on a surface of a base material. Characterized in that it is a sealer coating device that is configured to be provided in an integrated manner.

  According to the present invention, by providing the ceramic member on the nozzle surface, the wear resistance of the nozzle can be improved, and poor application of the sealer due to the wear of the nozzle can be prevented.

  In the above-mentioned sealer application device, the ceramic member may have a tapered shape whose thickness gradually decreases toward the discharge port. Thereby, the thickness of the ceramic member on the side of the discharge port is made as small as possible, and the thickness of the nozzle on the side of the discharge port can be set small, and the thickness on the side opposite to the discharge port is increased, The rigidity of the ceramic member can be ensured.

  Further, the present invention is characterized by a ceramic member integrally provided on a surface of a nozzle for discharging a sealer, the main component of which is zirconium oxide.

  ADVANTAGE OF THE INVENTION According to this invention, the abrasion resistance of a nozzle can be improved by the ceramic member provided on the nozzle surface, and the coating failure of a sealer by the abrasion of a nozzle can be prevented.

  ADVANTAGE OF THE INVENTION According to this invention, the abrasion resistance of a nozzle can be improved by the ceramic member provided on the nozzle surface, and the coating failure of a sealer by the abrasion of a nozzle can be prevented.

It is a figure showing the application operation by an application gun. It is a perspective view showing the application gun concerning one embodiment of the present invention. It is a top view of an application gun concerning one embodiment of the present invention. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is a perspective view showing signs that a sealer is applied by an application gun of the above-mentioned embodiment. It is a front view showing signs that a sealer is applied by an application gun of the above-mentioned embodiment.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

  As shown in FIG. 1, after the back door 2 provided on the vehicle body 1 is formed by joining an inner panel and an outer panel that constitute the back door 2, a coating operation of applying a sealer to a matching position is performed.

  Specifically, the worker 3 makes the application gun 10 as a sealer application device approach the position where the inner panel and the outer panel constituting the back door 2 are aligned, and applies the sealer. The alignment position of the inner panel and the outer panel extends along the edge of the panel. For example, the operator 3 discharges the sealer while moving the application gun 10 in the direction of arrow C in the drawing, thereby adjusting the alignment position. A sealer can be applied along. Although the back door 2 is illustrated in FIG. 1, the present invention is not limited to this, and the coating of the present embodiment may be applied to the alignment positions of the inner panel and the outer panel of each panel member provided on the vehicle body 1 such as a side door and a hood panel. A sealer can be applied by a gun.

  As shown in FIGS. 2 and 3, the application gun 10 has a pipe 19, a nozzle 11 and a guide member 12. The nozzle 11 is provided at a tip portion of the pipe 19. Further, the guide member 12 is provided on the distal end side so as to branch from the pipe 19. The guide member 12 is provided adjacent to the nozzle 11.

  As shown in FIG. 4, the nozzle 11 includes a substrate 13 and a ceramic member 14 provided on the outer surface side of the substrate 13. In the present embodiment, the ceramic member 14 is provided integrally with the base material 13 by bonding the ceramic member 14 to the surface of the base material 13 using an epoxy-based adhesive. However, the present invention is not limited to this, and the nozzle 11 in which the ceramic member 14 is integrally provided on the base material 13 can be formed by bonding, fixing, or the like by an appropriate method. In this manner, by providing the ceramic member 14 on the surface of the base material 13, for example, it is possible to form even a shape that is difficult to be formed only by the ceramic member 14. Further, since the nozzle 11 can be restored to the original shape only by replacing the ceramic member 14 attached to the base material 13, the maintenance thereof is also facilitated.

  The ceramic member 14 is made of a material having better wear resistance than the base material 13. In the present embodiment, the ceramic member 14 contains zirconium oxide as a main component. The base material 13 is made of SUS. When the main component of the ceramic member 14 is zirconium oxide, the wear resistance is high, so the wear of the ceramic member 14 itself is small, and the ceramic member 14 can be used for a long time. Further, when the main component of the ceramic member 14 is zirconium oxide, the Young's modulus is substantially the same as the Young's modulus of SUS, for example, 200 GPa or more and 220 GPa or less. It is elastically deformed to a degree, and it becomes easy to follow the substrate 13.

  At the center of the nozzle 11, a discharge port 11 a is provided on the inner surface side of each substrate 13, and a sealer supplied via a pipe 19 is discharged from the discharge port 11 a.

  In the nozzle 11, the discharge condition of the sealer from the discharge port 11a changes depending on the thickness W on the discharge port 11a side which affects the discharge condition of the sealer. Therefore, it is important to appropriately set the thickness W. In this regard, in the conventional nozzle, the nozzle is formed of a single material (for example, SUS), and the thickness W on the side of the discharge port is set.

  On the other hand, in the nozzle 11 of the present embodiment, the ceramic member 14 is provided on the surface of the base member 13 as described above, and the thickness of the base member 13 and the ceramic member 14 on the side of the discharge port 11a is set. Are set so that the sum of the thicknesses becomes the thickness W. Thereby, the nozzle 11 having the ceramic member 14 provided on the surface can be formed without changing the discharge condition of the conventional nozzle and the sealer. Further, by using the ceramic member 14 only on a part of the nozzle 11, that is, on the outer surface side that comes into contact with the vehicle body, the ceramic member 14 can be arranged only at a necessary place. The cost of the nozzle 11 can be reduced as compared with the case where the member 14 is used.

  Further, in the present embodiment, the ceramic member 14 has a configuration in which the surface opposite to the surface attached to the base material 13 has a tapered shape, and the thickness thereof gradually decreases toward the discharge port 11a. are doing. With such a shape, the thickness of the ceramic member 14 on the side of the discharge port 11a is made as small as possible, and even when the width W is smaller, the ceramic member 14 can be realized. By increasing the thickness on the opposite side), the rigidity of the ceramic member 14 can be ensured. In the present embodiment, as an example, the thickness W is set to 1.0 mm, and the thickness of the end of the ceramic member 14 on the discharge port 11a side is set to 0.5 mm.

  The ceramic member 14 has a chamfered edge on the side of the discharge port 11a. This can prevent the painted surface of the vehicle body from being damaged when the nozzle 11 comes into contact with the vehicle body.

  As shown in FIG. 3, the guide member 12 includes a base material 15 and a wear-resistant member 16 provided on a surface on one end side of the base material 15.

  In the present embodiment, similarly to the nozzle 11, the base material 15 is made of SUS, and the wear-resistant member 16 is made of a ceramic material containing zirconium oxide as a main component. Further, the wear-resistant member 16 is adhered by an epoxy-based adhesive, and is provided integrally with the base material 15.

  As shown in FIG. 5, the wear-resistant member 16 is formed in a hollow cylindrical shape, a notch is provided at one end thereof, and is attached to the surface of the base material 15 at the other end thereof (not shown). ). When the main component of the wear-resistant member 16 is zirconium oxide, the Young's modulus is substantially equal to the Young's modulus of SUS, for example, 200 GPa or more and 220 GPa or less. Are also elastically deformed to the same extent, and can easily follow the base material 15.

The main component in the ceramic member 14 and the wear-resistant member 16 (hereinafter, simply referred to as a member when the ceramic member 14 and the wear-resistant member 16 are collectively referred to) is 100% by mass of a component constituting each member. Refers to a component occupying 80% by mass or more of the above, at least one of silicon oxide and aluminum oxide as a component other than zirconium oxide, and yttrium oxide (Y ₂ O ₃ ), ytterbium oxide ( Yb ₂ O ₃ ), cerium oxide (CeO ₂ ), dysprosium oxide (Dy ₂ O ₃ ), magnesium oxide (MgO), and / or calcium oxide (CaO).

  The content of the components constituting each member is determined by identifying the components using an X-ray diffractometer (XRD), then determining the content of the elements using an X-ray fluorescence analyzer, and determining the content of the identified components. What is necessary is just to convert into quantity. The Young's modulus of each member can be determined by the ultrasonic pulse method described in JIS R1602-1995.

  When the main component of the ceramic member 14 is zirconium oxide, the average particle size of the crystal particles of zirconium oxide is preferably 1 μm or less (excluding 0 μm). When the average particle size of the crystal particles of zirconium oxide is in the above range, the phase transformation from tetragonal to monoclinic hardly occurs even when the nozzle 11 is used for a long time in an environment where the nozzle 11 is exposed to a high temperature. , Can be used for a long time. In particular, it is preferable that the average particle diameter of the crystal particles of zirconium oxide is 0.4 μm or less (excluding 0 μm).

  In order to determine the average particle diameter of the particles constituting each member, first, each member is polished until the fracture surface becomes a mirror surface, and then thermal etching is performed. The surface obtained by the thermal etching is used as a measurement surface, and an image is obtained by photographing at a magnification of 5000 to 10,000 times using a scanning electron microscope. With respect to an arbitrary point in the image as a center, six straight lines each having a length of, for example, 8 μm are drawn at 30 ° intervals, and the number of crystals existing on the six straight lines is calculated as the sum of these straight lines. By dividing by the length, the average particle size can be determined.

  In addition, for example, the ceramic member of the present embodiment is integrally provided to the existing nozzle 11 made of a material having lower wear resistance than a ceramic member such as SUS by post-processing and the like. The wear resistance of the existing nozzle 11 can also be improved. At this time, by applying the ceramic member 14 so as not to change the thickness W of the nozzle 11 (for example, by cutting a part of the nozzle 11), the application condition of the sealer by the application gun 10 is changed. In addition, the wear resistance of the nozzle 11 can be improved. Although the case of the nozzle 11 has been described, the wear resistance of the existing guide member 12 can be similarly improved by attaching the wear-resistant member 16 thereto. At this time, by attaching the wear-resistant member 16 so that the shape such as the thickness of the guide member 12 is not changed, the wear resistance can be improved without affecting the application condition of the sealer by the application gun 10. it can.

 Next, an operation of applying a sealer to the mating position 23 of the panel member 20 constituted by the inner panel 21 and the outer panel 22 by the above-described application gun 10 will be described with reference to FIGS. 6 and 7.

  As shown in FIGS. 6 and 7, the application gun 10 is brought close to the panel member 20, and the side surface of the guide member 12 is brought into contact with any part of the panel member 20 (in the illustrated example, the folded part of the outer panel 22). Thereby, the nozzle 11 can be positioned with respect to the vehicle body, brought into contact with a predetermined position of the panel member 20, and the discharge port 11 a can be brought closer to the alignment position 23. In this state, the sealer X can be applied to the matching position 23 by discharging the sealer X from the application gun 10.

  Then, the guide gun 12 is brought into contact with the panel member 20 and the application gun 10 is moved in the extending direction of the alignment position 23 (the sealer X in FIG. In the direction indicated by the arrow in FIG. 7) to discharge the sealer X. Thereby, the sealer X can be applied along the extending direction of the alignment position 23.

  In the course of this coating operation, the edge of the nozzle 11 on the side of the discharge port 11 a and the surface of the guide member 12 slide on the surface of the panel member 20. At this time, as described above, by providing the ceramic member 14 and the wear-resistant member 16 on the end edge of the nozzle 11 on the side of the discharge port 11a and the surface of the guide member 12, wear of the surface of the nozzle 11 and the guide member 12 is reduced. Can be prevented. Therefore, the repetitive use of the application gun 10 wears the surface of the nozzle 11 and changes the discharge condition of the sealer, and the abrasion of the surface of the guide member 12 changes the contact state of the guide member 12 with the panel member 20. Thus, it is possible to prevent the discharge position of the sealer X from changing. Therefore, the sealer can always be applied with a stable quality without fine maintenance of the application gun 10. Therefore, it is also possible to reduce the time and effort for maintenance of the application gun 10 and the cost for replacement. The position at which the guide member 12 abuts is not limited to the panel member 20, but may be a predetermined position near the panel member 20 in the vehicle body.

  Further, at the time of applying the sealer, the ceramic member 14 is tapered so that, for example, the nozzle 11 is moved to an appropriate ejection position, or the nozzle 11 is moved along the extending direction of the alignment position 23. At the time of an operation such as movement, the tapered surface may be a guide surface that contacts the vehicle body and guides the nozzle 11 in an appropriate direction.

  Although the embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made without departing from the gist of the present invention.

  In the above embodiment, the ceramic member 14 has a tapered shape whose thickness gradually decreases (see FIG. 4). However, for example, the ceramic member 14 may be shaped such that its thickness gradually decreases toward the ejection port 11a side, The shape of the outlet 11a side may be partially reduced in thickness.

  Further, in the above embodiment, the ceramic member 14 is provided outside the base material 13 so as to cover the base material 13. However, for example, the ceramic member 14 may be provided only in a portion of the nozzle 11 that contacts the vehicle body.

DESCRIPTION OF SYMBOLS 1 Body 2 Back door 3 Worker 10 Application gun (sealer application device)
DESCRIPTION OF SYMBOLS 11 Nozzle 11a Discharge port 12 Guide member 13 Base material 14 Ceramic member 15 Base material 16 Wear-resistant member 19 Pipe 21 Inner panel 22 Outer panel 23 Alignment position

Claims (3)

A sealer coating device including a nozzle having a discharge port for discharging a sealer,
The sealer coating device, wherein the nozzle is configured by integrally providing a ceramic member on a surface of a base material at least on a side of the discharge port.   The sealer coating device according to claim 1, wherein the ceramic member has a tapered shape whose thickness gradually decreases toward the discharge port.   A ceramic member integrally provided on the surface of a nozzle for discharging a sealer, the main component of which is zirconium oxide.

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