JPH0478351B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides support for the metal strip so that the work can be carried out easily and reliably when applying a resin lining to the outer surface or the entire surface of the metal strip. It is related to the device.

[Conventional technology and its problems]

Conventionally, the method of applying resin lining to the outer or entire surface of a metal strip, especially a metal tube, involves preheating the metal tube to be lined and immersing it in a lining tank in which a lining material such as resin powder is suspended and flowed. A method of sprinkling lining material while rotating a metal tube was used.

For example, in the method disclosed in Japanese Patent Publication No. 60-22985, a heated metal tube is rotated while being supported approximately horizontally, and the lining material is dropped almost simultaneously and in a uniform distribution over the entire length, and the falling time is Alternatively, a lining with a desired thickness can be obtained by adjusting the falling amount. In this case, rollers are used to support and rotate the metal tube, but if this roller corresponds to the area to be lined and the lining material is sprinkled,
Not only is the lining not carried out due to interference with the rollers, but the molten lining material often adheres to the rollers or is twisted, making smooth rotation impossible.

This is the same when using the above-mentioned floating fluidized tank, and it is particularly effective to rotate and oscillate the tube in order to apply uniform lining to tubes having various shapes. Consideration must be given to a support device for the tube that does not impair the formation of the lining film.

[Means for solving problems]

The present invention solves the problems of the prior art as described above, and provides an apparatus that can support and rotate metal strips, especially metal pipes, and easily perform repair lining. The purpose of this device is to heat a metal strip such as a metal tube 11 and bring it into contact with a lining material such as powdered resin to apply a resin lining to the outer surface or entire surface of the strip. , a ring 12 that is provided with three or more protrusions 14 having narrow contact surfaces that come into contact with the surface of the strip and surrounds the strip in an annular shape; and the ring 12 is centered around the axis of the strip. and a rotating means connected to the ring 12 for rotating the ring 12.

That is, the present invention provides an apparatus for lining metal strips with resin, in which a narrow support device is provided, and the support device supports the metal strip to be lined, thereby lining the strip without affecting rotation. Uniform lining is possible over the entire length of the material, and the unlined area is made as small as possible to facilitate repair. Furthermore, by adding and integrating a rotating device, uniform lining of the entire surface can be achieved even in a lining method using a fluidized tank in which a rotating device such as a rotating roller is not installed. Therefore, the lining material can be evenly distributed over the entire surface of a long tube, especially the inner surface, which has been difficult to process in the past, and even a tube with branch pipes can be lined uniformly.

[Effect]

When lining a metal strip, it is necessary to rotate and oscillate the strip in order to uniformly line the strip, so hold the strip firmly. In order to support the weight of the strip and ensure smooth rotation, ensure that three or more protrusions provided on the ring body are in contact with the surface of the strip to prevent deformation, collapse, etc. This enables stable lining processing.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

Embodiment 1 FIG. 1 is a front view of an example of the apparatus of the present invention, and FIG. 2 is a sectional view taken along the line A--A in FIG. 1.

In the figure, 11 is a metal tube to be lined, and 12 is a ring supporting the metal tube 11, which can be opened and closed about a rotating shaft 13.

Reference numeral 14 designates projections that firmly support the metal tube 11. In this case, two projections are provided on the upper and lower sides, and in order to prevent the ring 12 from falling down, they are provided slightly longer in the axial direction.

15 is a tightening device that ensures that the protrusion 14 is firmly attached to the metal tube 1.
1 to support its weight and to be tightened with sufficient strength so that it can be rotated without wobbling.

Reference numeral 16 denotes a ring roller, which is an example of a rotating means that is arranged to circumscribe the ring 12 and rotate the ring, and is also used in conventional lining devices.

In the above device, the metal tube 11 is heated in advance, the ring 12 is inserted into the tube end with the tightening device 15 loosened, and then the tightening device 15 is immediately tightened so that the ring 12 is attached to the tube body or the tube end. After confirming that the metal tube is firmly fixed, it is mounted on the roller 16, and the outer surface is lined by rotating the roller 16 and continuously sprinkling lining material powder, and if necessary, lining the metal tube in its axial direction. The lining is made to have a uniform thickness by being swung by pushing and pulling.

Embodiment 2 FIG. 3 is a front view of another example of the apparatus of the present invention using a fluidized tank, and in the figure, numerals 11 to 15 are the same as in Embodiment 1.

Reference numeral 21 denotes a rotating plate which is another example of a rotating means for rotating the ring 12, and is connected to the ring 12 by a connecting bolt 22.

Reference numeral 23 denotes a rotating device that applies rotational force to the rotating plate 21, and a motor 24 and a reduction gear 25.
rotated at an appropriate speed. Although not shown, rotational force is of course applied to the ring roller 16 described above from a rotating device similar to this rotating device 23.

Reference numeral 26 is a hanging device designed to support the above-mentioned device in a well-balanced manner.

27 is a moving beam for freely moving the support device, and 28 is a moving stage for easily moving the support device on the beam 27.

Now, to explain the operation of the above device,
It is as follows.

First, the metal tube 11 is heated in a heating furnace or the like, and the ring 12 with the bolt 22 attached is attached to the tube end by the tightening device 15.
After inserting it in the loosened state, immediately tighten the tightening device 1.
5 is tightened, the protrusion 14 is brought into firm contact with the tube body or the tube end, and the bolt 22 is inserted into the bolt hole of the rotary plate 21 and fixed, thereby connecting it to the rotating device 23.

In this state, the movable beam 27 is moved onto the fluidized tank using a suitable moving device, and if necessary, is swung in the axial direction within the fluidized tank and rotated by the rotating device 23 to perform lining.

After lining is completed, the tightening device 15 is released,
After the bolts 22 of the support device are removed and the lining metal tube 11 is removed, the unlined portion that comes into contact with the protrusion 14 is heated and lined to complete the work.

Note that FIG. 4 shows the main parts of a device different from the devices shown in FIGS. 2 and 3. In the figure, 11 to 15 are the same as in the previous figure, but the connecting member 31 is The difference is that the lower half of the ring 12 and the rotating plate 21 are always connected. For usage, see Example 1,
Although it is substantially the same as No. 2, it has the advantage that the work can be done without attaching or detaching the bolt 22.

In addition, in the above device, in order to facilitate firm contact with the tube body or to position the center of rotation at the center of the metal tube 11, if necessary, the protrusion 14 may be provided with a fine adjustment device, or the shape of the protrusion 14 may be , the number can also be changed.

〔Effect of the invention〕

The present invention is as described above, and since the metal strip to be lined on the outside or the entire surface can be lined while being supported and rotated with a minimum contact area, the lining strip with excellent quality can be easily produced. Moreover, it is possible to manufacture with labor saving compared to the conventional method, and it is extremely useful industrially.

[Brief explanation of drawings]

Figures 1 and 2 show one embodiment of the present invention, with Figure 1 being a front view and Figure 2 being A-A in Figure 1.
A line sectional view, FIG. 3 is a front view of another example, and FIG. 4 is a perspective view showing another example of essential parts. 11...Metal tube, 12...Ring, 13...Rotating shaft, 14...Protrusion, 15...Tightening device, 16...
... Ring roller, 21 ... Rotating plate, 22 ... Bolt, 23 ... Rotating device, 24 ... Motor, 25 ...
...Reduction gear, 26... Hanging equipment, 27... Moving beam.

Claims (1)

[Scope of Claims] 1. In an apparatus for heating a metal strip such as a metal tube 11 and bringing it into contact with a lining material such as powdered resin to apply a resin lining to the outer surface or the entire surface of the strip, a ring 12 having three or more protrusions 14 on its inner surface having narrow contact surfaces that abut the surface of the strip and surrounding the strip in an annular shape; and a ring 12 for rotating the ring 12 around the axis of the strip. A support device for a metal strip in a resin lining device for a metal strip, characterized in that it comprises a rotating means connected to the ring 12. 2. The device according to claim 1, wherein the rotating means for rotating the ring 12 is a rotary plate 21 provided on the ring 12 so as to be connectable and separable in the axial direction of the strip.