JP2009297630A - Cylinder inside dryer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cylinder inside drier which dries the inside surface of a cylinder well without impairing the quality of coating and thereby allows a reduction of the time for the drying process. <P>SOLUTION: The cylinder inside drier is used to dry the coating applied to the inside surface of a cylinder 1. It includes an insertion rod 3 which moves forward and backward in parallel with the axis of the cylinder 1 in such a way as to be inserted into or removed from the cylinder 1, an air nozzle 15 for finish drying which can brow dry air 14 toward the inside surface of the cylinder 1 at an appropriate position on the side of the tip of the insertion rod 3 within the cylinder 1 and an air nozzle 16 for rough drying which brows dry air 14, from the outside of the cylinder 1, toward the direction of the insertion of the insertion rod 3 at an appropriate position on the side of the base end of the insertion rod 3. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a cylinder inner surface drying apparatus.

  2. Description of the Related Art Conventionally, a shaft of a jet engine has been constituted by an elongated cylindrical body 1 having a diameter of about 150 mm and a length of about 3000 mm as shown in FIG. A thin coating film having a thickness of 40 to 70 μm is formed on the outer surface.

  Since this thin coating film is integrated with the cylinder 1 by performing a baking process after application, the coating film thickness of the coating film is maintained so that the stability of the baking process can be maintained. There is a strict requirement that the error must be within about 30 μm.

  For this reason, an extremely thin coating film of about 10 μm or less is overcoated in 6 to 7 times so as to realize a coating film with little error in film thickness. In this case, a process for drying the painted surface has to be interposed, and conventionally, the worker manually dried the painted surface with an air gun.

In addition, as prior art document information relevant to the technique of drying a coating surface, the following patent document 1, the patent document 2, etc. already exist, for example.
JP 4-9589 A JP-A-64-90064

  However, in the conventional means for manually drying the painted surface with an air gun, no matter how much dry air is blown from the end of the cylinder 1 with the air gun, the cylinder 1 is formed to be elongated, so that the inner part of the cylinder 1 is deep. There was a problem that it was difficult for dry air to spread, and it took time until the inner surface of the cylindrical body 1 was completely dried, resulting in a longer drying process.

  Further, if the spraying force is excessively increased to spread the dry air to the inner part of the cylindrical body 1, the coating film near the end of the cylindrical body 1 becomes dry air at the initial stage where the drying of the painted surface has not progressed yet. There was a risk that the coating quality on the inner surface of the cylindrical body 1 would be impaired due to strong spraying.

  The present invention has been made in view of the above circumstances, and provides a cylindrical inner surface drying apparatus capable of drying the inner surface of a cylindrical body efficiently and without impairing the coating quality to shorten the drying process. The purpose is that.

  The present invention relates to a cylinder inner surface drying apparatus for drying a coated surface applied to an inner surface of a cylinder, and an insertion rod that moves forward and backward in parallel with the axis of the cylinder so as to be inserted into and removed from the inside of the cylinder. A finishing drying air nozzle is provided at an appropriate position on the distal end side of the insertion rod so that dry air can be blown out toward the inner surface of the cylindrical body inside the cylindrical body, and at an appropriate position on the proximal end side of the insertion rod. A rough drying air nozzle is provided to blow dry air from the outside of the cylindrical body in the insertion direction of the insertion rod.

  Thus, when performing the drying process on the inner surface of the cylindrical body after coating the inner surface of the cylindrical body, the distal end side of the insertion rod is inserted into the cylindrical body, and the rough drying air nozzle on the proximal end side is inserted. Close to the end of the insertion rod, and then blow dry air from the rough drying air nozzle toward the insertion direction of the insertion rod in such a manner that the coating film near the end of the cylinder is not disturbed. Rough drying of the inner surface of the cylinder is performed from the outside so that the coating film is not disturbed by finish drying inside the body, and when this rough drying is completed, the blowout of dry air is switched to the finish drying air nozzle, While the dry air is blown out from the finish drying air nozzle toward the inner surface of the cylinder, the insertion rod is moved forward and backward to finish-dry the entire area of the inner surface of the cylinder within the cylinder.

  Further, in the present invention, it is preferable that the insertion rod is constituted by a painting gun for painting the inner surface of the cylinder, and in this way, the painting gun that has finished the painting process remains inserted into the cylinder. It is possible to quickly shift to the drying process, and it is possible to divert the apparatus configuration for the painting process as it is.

  Furthermore, in the present invention, it is preferable to include a support base that supports the cylinder body so that the cylinder body can be driven to rotate about the axis of the cylinder body. In this way, the cylinder body is roughly dried while rotating the cylinder body on the support base. It is possible to blow dry air uniformly on the inner surface of the cylindrical body by performing finish drying.

  According to the cylinder inner surface drying apparatus of the present invention described above, various excellent effects as described below can be obtained.

  (I) According to the first aspect of the present invention, the inner surface of the cylinder is roughly dried from the outside by blowing dry air from the rough drying air nozzle, and the dry air is discharged inside the cylinder by the rough drying. Even after spraying on the inner surface, the coating film is not disturbed, and the dry air blowing is switched to the finish drying air nozzle to move the insertion rod forward and backward, and finish drying the entire area of the inner surface of the cylinder. Therefore, it is possible to dry the inner surface of the cylindrical body efficiently and without impairing the coating quality, and thus the drying process can be shortened significantly in comparison with the conventional method.

  (II) According to the invention described in claim 2 of the present invention, since the coating gun that has finished the coating process can be quickly transferred to the drying process while being inserted into the cylinder, particularly in overcoating and the like. The work efficiency in the case of repeating the painting process and the drying process can be greatly improved, and the equipment configuration for the painting process can be used as it is, which can greatly reduce the equipment cost. it can.

  (III) According to the invention described in claim 3 of the present invention, dry air is blown evenly onto the inner surface of the cylindrical body by performing rough drying or finish drying while rotating the cylindrical body on the support base. It is possible to achieve uniform drying with no unevenness.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 and FIG. 2 show an example of an embodiment for carrying out the present invention. The cylinder 1 constituting the shaft of the jet engine described above with reference to FIG. Although the cylindrical inner surface drying device is shown, the example shown here is a cylindrical inner surface drying device having a structure also serving as a coating device for coating the inner surface of the cylindrical body 1.

  That is, as shown in FIG. 1, in the cylindrical body inner surface drying apparatus of this embodiment, the cylindrical body is detachable from the inside of the cylindrical body 1 installed horizontally on the support base 2. An insertion rod 3 that moves forward and backward in parallel with the axis 1 is provided. The insertion rod 3 is constituted by a coating gun that coats the inner surface of the cylindrical body 1. The coating material is sprayed from the spray port 5 of the coating nozzle 4 provided at the tip toward the inner surface of the cylindrical body 1.

  The insertion rod 3 is supported in a horizontal state by a movable carriage 7 that moves along a guide rail 6 provided parallel to the axis of the cylindrical body 1, and is an endless end (not shown) that is stretched in the guide rail 6. The movable carriage 7 is moved along the guide rail 6 by circulatingly driving the chain with the drive device 8 so that the cylinder 1 is moved forward and backward.

  A pair of left and right drive shafts 9 extending in parallel with the cylindrical body 1 are provided on the upper surface of the support base 2 so as to be rotationally driven by a drive device (not shown), and one of the drive shafts 9 in the longitudinal direction is provided. A pulley 10 with both ends is fitted on the end, and a roller 11 that is long in the axial direction is fitted on the other end in the longitudinal direction of each drive shaft 9. These pulleys 10 and rollers 11 support both ends of the cylindrical body 1 via ring-shaped jigs 12 and 13.

  That is, by rotating the drive shafts 9 in the same direction, the cylindrical body 1 is driven to rotate about the axis via the jigs 12 and 13, and one jig 12 is mounted on both sides. It is supported by the attached pulley 10 to suppress the movement of the cylindrical body 1 in the axial direction, and the other jig 13 is supported by the roller 11 that is long in the axial direction. This is to make it possible to deal with other cylindrical bodies 1 having different sizes.

  As shown in an enlarged view in FIG. 2, in this embodiment, the inner surface of the cylinder 1 is placed inside the cylinder 1 at an appropriate position on the distal end side of the insertion rod 3 constituted by the coating gun as described above. A finish drying air nozzle 15 is provided so that the dry air 14 can be blown out toward the end, and an insertion direction of the insertion rod 3 from the outside of the cylindrical body 1 at an appropriate position on the proximal end side of the insertion rod 3 (left direction in FIG. 2) ) Is provided with a rough drying air nozzle 16 that blows out the dry air 14.

  Here, the finish drying air nozzle 15 is provided in a form incorporated in the distal end side of the insertion rod 3, and an injection port 17 is opened on the outer peripheral surface of the insertion rod 3 to insert the insertion rod 3. The dry air 14 can be blown out obliquely in the direction (left direction in FIG. 2).

  That is, if the dry air 14 is blown obliquely in this manner, it is possible to increase the distance from the spray port 17 of the finish drying air nozzle 15 until the dry air 14 actually hits the inner surface of the cylinder 1. The dry air 14 can be diffused and blown over a wide range with a sufficiently weak wind.

  The rough drying air nozzle 16 is provided in a form of being externally fitted to the proximal end side of the insertion rod 3 via a support 18. In the example shown here, the insertion rod 3 is provided. These are provided in pairs at two locations in the circumferential direction (one location is acceptable) and have a relatively large capacity so that a larger volume of dry air 14 can be blown out than the finish drying air nozzle 15.

  2 denotes an air tube for guiding the dry air 14 to the finish drying air nozzle 15 through the inside of the insertion rod 3, and 20 denotes an air tube for guiding the dry air 14 to the rough drying air nozzle 16. The air tubes 19 and 20 are adapted to guide the dry air 14 at normal temperature adjusted in humidity.

  Thus, the distal end side of the insertion rod 3 is inserted into the cylindrical body 1, and the insertion rod 3 is moved forward and backward while rotating the cylindrical body 1 on the support base 2. When the coating material is sprayed toward the inner surface of the cylindrical body 1, the coating material is sprayed on the inner surface of the cylindrical body 1 in a spiral manner. Thus, the inner surface of the cylindrical body 1 is coated. When performing the drying process of the inner surface of the cylinder 1 later, the rough drying air nozzle 16 on the proximal end side is inserted into the end of the insertion rod 3 while the distal end side of the insertion rod 3 is inserted into the cylinder 1. Next, the dry air 14 is blown out with a force that does not disturb the coating film in the vicinity of the end of the cylindrical body 1 from the rough drying air nozzle 16 toward the insertion direction of the insertion rod 3. After rough drying is completed, dry air is dried. 4 is switched to the finish drying air nozzle 15, and the insertion rod 3 is moved forward and backward while blowing dry air 14 from the finish drying air nozzle 15 toward the inner surface of the cylinder 1, thereby finishing and drying the entire area of the inner surface of the cylinder 1. This is performed inside the cylinder 1.

  At this time, in the rough drying performed in advance, it is important to dry the coating surface to such an extent that the coating film is not disturbed by spraying the dry air 14 from the finish drying air nozzle 15 in the next finish drying. In practice, rough drying time management may be appropriately performed.

  Moreover, when performing the above-mentioned rough drying and finish drying, it is preferable to carry out while rotating the cylinder 1 on the support stand 2 like a coating process, and in this way, the cylinder 1 is supported on the support stand 2. By performing rough drying or finish drying while rotating above, dry air 14 can be sprayed evenly on the inner surface of the cylinder 1 to dry it.

  However, by providing a plurality of finish drying air nozzles 15 and rough drying air nozzles 16 in a balanced manner in the circumferential direction of the cylinder 1, it is possible to perform the drying process without rotating the cylinder 1 on the support 2. Needless to say.

  Therefore, according to the above-described embodiment, the inner surface is roughly dried from the outside of the cylindrical body 1 by blowing the dry air 14 from the rough drying air nozzle 16, and the dry air 14 is blown to the inner surface of the cylindrical body 1 by the rough drying. However, after the coating film is not disturbed, the blowout of the dry air 14 is switched to the finish drying air nozzle 15 to move the insertion rod 3 forward and backward, and finish drying of the entire inner surface of the cylinder 1 is performed. Therefore, it is possible to dry the inner surface of the cylinder 1 efficiently and without impairing the coating quality, and thus the drying process can be significantly shortened compared to the conventional method.

  Further, in the present embodiment, the insertion rod 3 is constituted by a painting gun for painting the inner surface of the cylinder 1, so that the drying process can be quickly performed while the painting gun after the painting process is inserted into the cylinder 1. In particular, it is possible to greatly improve the work efficiency when the painting process and the drying process are repeated by overcoating etc., and the equipment configuration for the painting process can be diverted as it is. Therefore, the equipment cost can be greatly reduced.

  Moreover, since the support base 2 that supports the cylinder 1 so as to be rotationally driven about the axis of the cylinder 1 is provided, rough drying and finish drying are performed while the cylinder 1 is rotated on the support base 2. Thus, the dry air 14 can be sprayed uniformly on the inner surface of the cylindrical body 1 to dry it, and uniform and uniform good drying can be realized.

  Furthermore, although not specifically described in the above-described embodiment, a function of turning the cylindrical body 1 in the horizontal direction is attached to the support base 2 as necessary, and the direction of the cylindrical body 1 facing the insertion rod 3 is set. It is also possible to dry the inner surface of the cylindrical body 1 by half in the longitudinal direction while reversing 180 °. In this way, the length and moving stroke of the insertion rod 3 can be shortened and the apparatus can be downsized. Can be achieved.

  The cylindrical inner surface drying apparatus of the present invention is not limited to the above-described embodiment. The insertion rod may be provided separately from the coating gun, and the cylindrical support base is not necessarily a cylindrical body. Needless to say, it is not necessary to have a function of rotating and driving, and various modifications can be made without departing from the scope of the present invention.

It is a perspective view showing the whole composition of an example of an embodiment which carries out the present invention. It is sectional drawing which shows the detail of the insertion rod of FIG. It is sectional drawing which shows an example of a cylinder.

Explanation of symbols

1 Cylinder 2 Support stand 3 Insertion rod (paint gun)
14 Dry air 15 Finish drying air nozzle 16 Rough drying air nozzle

Claims (3)

  A cylinder inner surface drying device for drying a coating surface applied to the inner surface of a cylinder, comprising an insertion rod that moves forward and backward in parallel with the axis of the cylinder so as to be inserted into and removed from the inside of the cylinder, A finish drying air nozzle is provided at an appropriate position on the distal end side of the insertion rod so that dry air can be blown out toward the inner surface of the cylindrical body inside the cylindrical body, and at an appropriate position on the proximal end side of the insertion rod. A cylindrical inner surface drying apparatus comprising a rough drying air nozzle for blowing dry air from the outside toward an insertion direction of the insertion rod.   2. The cylinder inner surface drying apparatus according to claim 1, wherein the insertion rod is constituted by a coating gun for coating the inner surface of the cylinder.   The cylindrical body inner surface drying apparatus according to claim 1 or 2, further comprising a support base that supports the cylindrical body so as to be rotationally driven about the axis of the cylindrical body.

Images