JP3030876U - Metal strip coating device - Google Patents

Abstract

(57) [PROBLEMS] To provide a coating device capable of uniformly performing resin coating by a fluidized dipping method even on a metal strip having a deep recess such as an H-shaped steel. SOLUTION: A beam member 1 oriented substantially horizontally, two motor-driven drive wheels 2a, 2b attached to both ends of the beam member 1, and the drive wheels 2a, 2b. Has two endless ropes 4a, 4b suspended respectively, and two driven wheels 5a, 5b suspendable on each of the ropes 4a, 4b, and the driven wheels 5a, 5b are at both ends. A metal strip rotating device 6 configured to rotate the metal strip 9 attached to the above-mentioned driven wheels 5a, 5b at both ends on the above-mentioned strips 4a, 4b to rotate the suspension.
And a fluidized tank 7 for forming a fluidized bed of resin powder.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to an apparatus for applying a resin coating to a metal strip material such as shaped steel using powder resin.

[0002]

[Prior art]

 Coating with a resin such as polyethylene has been used for many years as a long-term anticorrosion means for steel pipes and cables. In recent years, resin coatings have also begun to be applied to shaped steels and sheet piles for the purpose of reducing repair costs. Unlike the steel pipe outer surface, extrusion coating is difficult to apply to metal strips containing recesses, such as shaped steel, but powder coating is possible. In particular, a fluidized dipping method in which a member heated to a temperature equal to or higher than the melting point of the resin is dipped in a fluidized bed fluidized by being blown from below into the resin powder contained in the tank to melt and form a film of the resin is known. It seems that it is suitable for large area construction at a stretch, and it is also suitable for complex shapes, but in reality it is not as smooth as for steel pipes. This is because the resin powder that is floated by the gas and fluidized is difficult to enter into the concave portion depending on the shape of the concave portion, and that portion is not covered, and there is a rib on the metal steel material. In such cases, the above tendency is particularly remarkable.

However, it has been found that the above-mentioned problems can be solved by rotating the metal strip in the fluidized tank or changing the dipping posture.

[0004]

[Problems to be solved by the device]

 In view of the above-mentioned circumstances, the present invention provides a coating apparatus capable of implementing the above-mentioned measures required for resin coating on a shaped steel or the like by a fluidized-bed method without increasing the work load. Is an issue.

[0005]

SUMMARY OF THE INVENTION An apparatus of the present invention, which is intended to solve the above-mentioned problems, has a beam member oriented substantially horizontally, and a motor attached to each end of the beam member. It has two driven wheels to be driven, two endless ropes suspended on each of the drive wheels, and two driven wheels suspendable on each of the ropes. A metal strip rotating device configured to rotate the metal strips attached to both ends with the driven wheels at both ends suspended on the above-mentioned ropes, and to form a fluidized bed of resin powder. It is characterized by comprising a fluidized tank.

That is, if resin coating is carried out using the device of the present invention, an operation of heating the metal strip to a temperature equal to or higher than the melting point of the resin and end jigs ( In the device of the present invention, the driven wheel or the end jig integrated with the driven wheel is attached, and then the metal strip with the jig attached is suspended and immersed in a fluidized tank. That is, the above-mentioned measures can be implemented only by adding an operation such as a switch ON / OFF for operating the drive wheel to the conventional fluidized dip coating operation. It will be solved.

[0007]

[Embodiment of device]

 Next, an example of an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a view conceptually showing the configuration or use state of the device of the present invention. The metal strip rotating device 6 includes a beam member 1 and drive wheels 2a and 2b attached to both ends thereof. The driving mechanism 3a, 3b for driving this, the endless cords 4a, 4b suspended on the driving wheels 2a, 2b, and the driven wheels 5a, 5b capable of being suspended thereon are provided. Reference numeral 9 is a metal strip as a work to be covered. Further, 7 is a fluid tank, in which the resin powder placed on the breathable partition film 10 is floated and fluidized by the air supply from the air supply port 11, and the fluidized bed, that is, the penetration of the object is easy. A layer of various floating powder groups is formed in the fluidized tank 7. The one-dot chain line 12 shows the upper surface of the fluidized bed.

The beam member 1 is made of H-shaped steel or the like having a required strength, and lifting eyes 8a and 8b are provided so that the metal strip rotating device 6 can be easily handled by a crane or the like. Is good.

The drive wheels 2a, 2b, the driven wheels 5a, 5b and the endless cords 4a, 4b are a combination of pre-belt, sprocket / roller chain, reel / link chain. It is possible to exemplify falsehood.

The drive mechanism for driving the drive wheels 2a and 2b is provided with a motor and, if necessary, a transmission or the like. Further, it is desirable that the drive mechanism is configured so that control such as ON / OFF, acceleration / deceleration, and rotation direction switching can be performed by hand, and that the rotation direction switching can be programmed.

The motor is usually an electric motor, and among them, an inverter motor that can efficiently start, accelerate, decelerate, and stop is suitable. An air motor or the like may be used depending on the situation.

The driven wheels 5a and 5b usually have a structure in which end jigs 5c and 5d having a masking function for providing an uncovered portion at the end of the strip are integrated, The jigs 5c and 5d may be fixed to the metal strip 9 by means such as screw fastenings 5e and 5f, but depending on the situation, as shown in FIG. 2, the driven wheels 5a and 5b may be fixed to the metal strip. It may be configured such that it is directly fixed to 9.

The coating of the metal strip with the device of the present invention is performed as follows. First, heat the metal strip 9 such as H-section steel, which has been subjected to surface cleaning and surface roughening according to a conventional method, to a predetermined temperature above the melting point of the coating resin (depending on the type of resin, many are above 200 ° C). Suru

Next, the driven wheels 5a and 5b are fixed to both ends of the heated metal strip 9 (this fixing operation may be performed before the heating), and the metal strip rotating device 6 The main body of the device is suspended by cranes, and the loops at the lower ends of the endless cords 4a, 4b of the device are engaged with the driven wheels 5a, 5b fixed to both ends of the metal strip 9, The metal strip 9 is lifted together with the rotating device 6 and is suspended in the fluid tank 7 to immerse the metal strip 9 in a fluidized bed of powder resin.

The metal strip 9 which is a work is rotated during the immersion, but the rotation may be started before the immersion in the fluidized bed or after the immersion. Depending on the shape of the metal strip 9, the above rotation is not limited to one direction, but it is better to switch the direction at least once so that the resin powder spreads to each part of the work evenly and evenly. A different coating is formed.

The metal strip 9 may be rotated at most about 10 times (5 reciprocations) while the metal strip 9 is immersed in the flow tank, so the rotation speed is set to about 0.3 to 3 rpm. It is good to be able to do so. The above rotation does not necessarily require completion of one half rotation or one rotation for that purpose.

The fluidized-bed method is generally carried out by immersing the whole work in a fluidized bed of resin powder, and the apparatus of the present invention may be used in the same manner. Since the work rotates the work, a part of the work can be dipped so that the entire work can be covered. Therefore, for the purpose of uniformly applying the thin film coating, the coating may be carried out by immersing a part of the work.

INDUSTRIAL APPLICABILITY The device of the present invention can be suitably used for resin-coating a metal strip material having a deep recess, such as an H-section steel, a channel steel, or a plate assembly welding strip having ribs arranged vertically and horizontally. However, even when it is used for coating metal strips such as steel bars, round pipes, and square pipes that do not have recesses, it is possible to achieve uniform coating of thin film more easily.

The type of resin to be coated by the device of the present invention is not particularly limited, and various resins used in a usual powder coating method such as polyethylene, polypropylene, nylon, saturated polyester, and fluororesin are targeted. Is.

[0020]

[Effect of device]

 As described above, the present invention applies the resin coating to the metal strip by the fluidized-bed method so that the metal strip is rotated on the fluidized bed so that the resin powder can be spread evenly in the deep recesses. This is a measure that can be implemented by immersing it without increasing the workload.

That is, with the device of the present invention, resin coating on a metal strip material having a deep recess, such as an H-shaped steel, a channel steel, or a plate-welded strip having ribs arranged in the vertical and horizontal directions, can be performed by resin coating. This makes it possible to easily carry out the same process as that of a steel pipe or the like that does not exist, and also has the effect that uniform coating of a thin film can be performed even more easily on a steel pipe or the like.

[Brief description of drawings]

FIG. 1 is a front view conceptually showing the configuration or use state of the device of the present invention.

FIG. 2 is a front view showing another example of driven wheels in the apparatus of FIG.

[Explanation of symbols]

 1 Beam member 2a, 2b Drive wheel 3a, 3b Drive mechanism 4a, 4b Endless rope 5a, 5b Driven wheel 6 Metal strip rotating device 7 Fluid tank 8a, 8b Lifting eye 9 Metal strip 10 Breathable partition membrane 11 Air supply mouth

Claims (1)

[Scope of utility model registration request] 1. A beam member that is oriented substantially horizontally, two motor-driven drive wheels attached to both ends of the beam member, and a suspension member (2) suspended on each of the drive wheels. An endless rope of a book and two driven wheels that can be suspended on each of the ropes. A metal strip having the driven wheels attached to both ends is used to suspend the driven wheels at both ends on the rope. A metal strip material coating device comprising a metal strip material rotation device configured to rotate in a suspended state, and a fluid tank for forming a fluidized bed of resin powder.