JPH0750954A - Wire mesh for net-cage pisciculture and its production - Google Patents

Abstract

PURPOSE:To obtain a wire mesh having double-layer structure, resistant to the abrasion even if the wires are rubbed against another at the twisted part by wave and tidal flow and resistant to the corrosion with seawater even if a part of the resin coating is peeled off by manufacturing a continuous wire net for net-cage pisceculture with titanium wire to a necessary width by hexagonal knitting, etc., and continuously applying a resin coating to the whole knit titanium wire. CONSTITUTION:This wire net for net-cage pisceculture is produced by manufacturing a wire net having a necessary width with a titanium wire e.g. by hexagonal knitting and continuously applying resin coating to the net. Concretely, the wire net is rolled in the form of a coil, passed through a tension regulation apparatus and a preheating oven, introduced into a shallow powder resin tank and vibrated with a vibrator. The vibration is transmitted to the powder resin to make the powder in fluidized state by including air into the powder layer. The resin tank itself is also vibrated by a vibrator attached to the bottom of the tank. A powder resin is supplied from a powder resin supplying tank and subjected to complete thermal adhesion in a heating oven and the coated wire mesh is cooled with a cooling damper and wound with a winder.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coated wire cage for aquaculture cages and a method for producing the same.

[0002]

2. Description of the Related Art The applicant has already applied for a "cultivation cage" using titanium wire (Japanese Patent Application No. 4-166638). However, the wire net of aquaculture cage made of titanium wire is a conventional synthetic fiber. It was proved that the durability against seawater was outstandingly superior to that of nets and iron nets. However, it was found that the twisted portions of the titanium wire of the wire mesh rub against each other due to the influence of waves and tidal currents, which may cause wear. At present, there is a wire coated with resin.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to exert the advantages of titanium wire, which is a material for aquaculture wire mesh, and to eliminate friction itself caused by waves and ocean currents that cause wear. At present, wire mesh knitted using resin-coated wire is commercially available.However, even when wire mesh is knitted with resin-coated wire, the twisted part, that is, the contact part, receives friction due to waves and tidal currents. And it is clear that it will wear out from there.

[0004] Further, it is technically difficult to uniformly process the long wire cage for net cages, which requires a mesh width of 2 to 2.5 m, by the conventional fluidized dipping method of powder resin.

[0005]

[Means for Solving the Problems] In order to completely prevent the friction of the twisted part of the wire net of the aquaculture cage due to waves and tidal current and to completely prevent the wear of the wire net, it is necessary to completely prevent the friction of the wire net. That is, that is, to completely fix the twisted portion and the contact portion of the titanium wire of the wire mesh. For this purpose, if a wire mesh is knitted in a long length of titanium wire with a required width (2 to 2.5 m) and then the whole wire mesh is coated with resin, the friction between the wire meshes can be completely prevented. As a result, the twisted portion of the wire mesh is completely fixed, and a wire mesh having a composite structure of titanium wire and resin coating is created.

As a resin for coating the wire net, a liquid (sol-like) resin is unsuitable because it has too high a plasticity and a weak fixing force. Therefore, a powdery semi-hard resin such as a polyethylene resin is basically used. .

[0007] As described above, it is technically difficult to manufacture a wire net for aquaculture cages and then coat them with resin by the conventional fluidized dipping method of powder resin. That is, since the aquaculture cage requires a net width of 2 m to 2.5 m, in order to continuously coat the long wire net having the necessary width with resin, conventionally, the powder resin is put in a special tank. There is a method in which the powder resin is made to flow by feeding air from the bottom and the preheated object is dipped for coating, but in a large capacity powder resin tank, air and resin It is difficult to evenly stir, and the cost of the device is expensive,
It is difficult to coat the aquaculture cage wire mesh of the present application.

In the present invention, a wire mesh for aquaculture cage having a necessary width and a long length made of titanium wire for a turtle shell, etc. is wound into a coil and first passed through a tension adjusting device (tension controller) to enter a preheating furnace. The wire mesh is heated and then passed through a resin bath. Powder resin (semi-hard resin such as polyethylene) is basically used in the resin tank, and the thickness of the resin layer is about 20 to 30 mm. In this resin layer, the preheated wire mesh advances to adsorb the powdered resin, and progresses to the next step in a state of being half gelled.

In addition, in this resin tank,
The vibration generator, which is connected to and fixed to the front and rear feed rollers of the wire mesh, transmits the vibration to the wire mesh, and the vibration of the wire mesh itself gives vibration to the powder resin, which causes air inside the resin (monomer). A fluid state will be generated in the form of being involved. A vibration generator is also attached to the bottom of the resin tank, and the resin tank itself also vibrates so that the powder resin is leveled horizontally without enduring it. Powdered resin is supplied.

The wire net adsorbing the powdered resin and adhering the resin in the state of being half gelled and advancing advances to the heating furnace next.
The powder resin is completely heated and polymerized by being heated in a heating furnace.

After this, the wire mesh entered the cooling damper,
It is cooled, but during this time, until it is completely cooled, the intermediate feed roller and the like cannot be used, so the heating furnace and the cooling damper need to move at a constant elevation angle.

[0012]

Since the present invention is constructed as described above,
The titanium wire, which has excellent corrosion resistance to seawater, was once made into a tortoiseshell knitting of the required width, etc., and the entire wire mesh is coated with powder resin, so even the twisted part of the wire mesh can be worn over the twisted part. Therefore, the twisted portion of the wire netting is fixed, friction does not occur due to waves or tidal currents, and a wire netting structure that is hard to wear is provided. If the coating is torn off, the titanium wire creates a double structure that can withstand erosion by seawater.

Also, in the method of coating with a powder resin, once a wire mesh for aquaculture cages having a required width and a long length is manufactured and this is resin-coated, as a new method, the wire mesh itself passing through the powder resin tank is fed. The vibration of the wire mesh propagating in the powder resin layer is transmitted to the powder resin layer by vibrating by the vibration generator fixed to the roller, and the fluid state is generated by entraining air inside the resin (monomer) and the powder resin. Since the tank itself is vibrated by the vibration generator installed at the bottom, the powder resin supplied from the powder supply tank does not withstand consumption and is leveled by the vibration so that the powder resin is fluidized and dipped. However, uniform coating results can be obtained.

[0014]

EXAMPLE As shown in FIG. 1, according to the present invention, a metal net A for a cage is woven with a titanium wire in a required width and a long length, and a resin B is coated on it. The wire mesh A for use is manufactured to have a required width (2 m to 2.5 m) and a long length, and the wire mesh A is formed into a coil shape, and as shown in FIGS. It is to be coated.

First, the wire mesh A advances from the uncoiler 1 by the tension that advances in the advancing direction, but backward tension (back tension) is also required, and after passing through the tension adjusting device 2 (tension controller, preheating furnace 3 (temperature adjusting With device)
The wire mesh that has entered and preheated then advances in the powder resin tank 4. The powder resin tank 4 has a shallow depth of 20 to 30 mm,
In this, the powder resin 5 is constantly supplied from the powder resin supply tank 6 in proportion to the consumption amount. The feed roller 7 is also provided between the preheating furnace 3 and the powder resin tank 4, but the connecting plates 9 and 9 provided at the upper end of the powder resin tank 4 between the front and rear two feed rollers 8a and 8b in the traveling direction. The vibrations are transmitted to the wire net A by the vibration generators 10 and 10 connected and fixed to the wire net A. As the wire net A moves while vibrating, the powder resin 5 also vibrates. Separately, vibration generators 11 and 11 are attached to the bottom of the powder resin tank 4, and the powder resin tank 4 itself vibrates from the bottom without enduring, and the powder resin layer is constantly leveled as much as possible to preheat the inside. The wire mesh A thus formed advances and adsorbs the powder resin 5.

Next to the powder resin tank 4, the wire net A is a heating furnace 12.
Enter (gelation furnace). Since the resin used for this coating is a heat-polymerizable resin, the wire mesh that has passed through the powder resin tank 4 already has the half-gelled powder resin attached thereto. Completely heat-polymerize.

Next, the wire mesh A is cooled by the cooling damper 13, but is heated after passing through the powder resin tank 4,
Since the powder resin 5 is thermally polymerized, the feed roller cannot be used. Therefore, the heating furnace 12, the cooling damper 1
The step 3 is to proceed at a constant elevation angle. After cooling, the wire netting A is wound up by the winding device 14.

[0018]

As described above, according to the present invention, the titanium wire is coated on the wire itself, and then the wire mesh having a necessary width is manufactured without forming the wire mesh such as the turtle shell. This is a continuous resin coating that eliminates the friction of the titanium wire itself and the partial friction and wear of the wire mesh. Even if a part of the coating is peeled off, the titanium wire has great durability against seawater and does not corrode.

In the resin coating method for the cage of the present invention, the powder resin is vibrated by the vibration generator to generate a fluidized state by entraining air inside the powder resin, regardless of the conventional method of dipping the powder resin. The method has a large effect that a resin coating can be satisfactorily formed by continuously forming a cage having a necessary width and a long length.

[0020]

[Brief description of drawings]

FIG. 1 A part of a wire net for aquaculture cage of the present invention

FIG. 2 is a plan view of the manufacturing apparatus of the present invention.

FIG. 3 is a side view of FIG.

[Explanation of symbols]

 A titanium wire gauze B coating resin 1 uncoiler 2 tension adjusting device 3 preheating furnace 4 powder resin tank 5 powder resin 6 powder resin supplying device 7 feed roller 8a 8b feed roller 9 connecting plate 10 vibration generator 11 vibration generator 12 heating furnace 13 Cooling damper 14 Winding device

Claims (2)

[Claims] 1. A wire net for an aquaculture cage, wherein a long wire net such as a turtle shell net having a required width is made of titanium wire, and the whole wire net is continuously coated with powdered resin. 2. A wire net for aquaculture cages having a required width and a long length is made of titanium wire, which is wound in a coil shape, and the wire net passes through a tension adjusting device and then through a preheating furnace, The powder resin tank moves through a shallow powder resin tank, but this powder resin tank is shaken by a vibration generator installed at the bottom, and the wire mesh itself is also a semi-hard resin powder resin that vibrates together with a vibration generated by a separate vibration generator. A method for manufacturing a series of aquaculture cage wire nets, which comprises advancing in a layer, passing through a heating furnace, entering a cooling dambar, cooling, and winding by a product winding device.