KR100909404B1 - Buoy and manufacturing method thereof - Google Patents

Abstract

A float and a manufacturing method thereof are provided to improve durability and to cut down on maintenance cost because the expandable bead injected through the expandable bead injection hole is promulgated and the foam is formed. A manufacturing method of a float comprises a step for blow-molding a body(20) made of the synthetic resin material within the blow-molding die; a step for injecting the expandable bead in the space of the body in the state that the body is placed within the blow-molding die through the expandable bead injection nozzle inserted into one side of the blow-molding die; and a step for forming a foam(30) inside the body. The expandable bead is manufactured comprising a pre-heating step for heating raw material bead in the pre-foaming unit and forming the pre-foaming bead; a heat-up step for heating up the pre-foaming bead again and forming the expandable bead; and a step for inputting the expandable bead into the silo equipped in one side of pre-foaming unit and drying and aging it.

Description

BUOY AND MANUFACTURING METHOD {BUOY AND MANUFACTURING METHOD THEREOF}

The present invention relates to a buoy and a method for manufacturing the same, and more particularly, to a buoy with a foam foam filled in the body of the synthetic resin material and a method for manufacturing the same.

Buoys are generally used as a means to install and mark farms by allowing them to be suspended on a cylindrical body, such as nets or strings, for floating farms in nearby waters. It is a type of net component that is indispensable in the fisheries industry, where seaweed grows in adherent organisms such as seaweed, seaweed or oysters.

The buoys currently used can be broadly divided into those made of polystyrene foam (hereinafter referred to as 'styrofoam') and those made of polyethylene foamed resin, of which styrofoam is mainly used.

The reason why the buoy of the styrofoam material is used a lot is because it is light, buoyant, corrosive, easy to install, and low in cost.

However, in the case of a styrofoam material, the material is weak and easy to wear, and there is a problem in that buoyancy is lost while moisture is absorbed during long-term use.

In particular, it is easy to be damaged when it is impacted by waves or wind or collided with an object floating in the sea, and since the styrofoam itself has large pores, the buoyancy decreases due to the cohesion of seawater. It will not be able to function properly, and as the styrofoam debris due to the buoy breaks becomes floating at sea, it may cause sea pollution.

In addition, the buoyancy of the polyethylene foam resin material is superior to the styrofoam material buoyancy, so there is little risk of damage due to various causes, but polyethylene foam resin itself absorbs water, If the buoy of the foamed resin material is used for about one year, there is a problem that the buoyancy of the buoy is weakened and submerged in seawater.

The present invention has been made to solve the problems described above, one embodiment of the present invention includes a body having a space portion therein, and the foam is foamed filled in the space portion, the body integrally as a synthetic resin material Blow-molded, the foam is characterized in that the foam bead injected through the foam bead injection hole provided on one side of the body is formed by foaming, easy to manufacture has the effect of improving productivity, durability is improved, maintenance costs Are saved and related to buoys and their fabrication methods that can contribute to environmental protection.

According to one embodiment of the present invention, the body having a space therein, and the foam including the foam filled in the space, the body is blow molded integrally as a synthetic resin material, the foam is injected into the foam beads provided on one side of the body A buoy is provided which is formed by foaming beads injected through a ball.

Here, the foam beads are made of a expandable polystyrene resin, at least one connection ring is formed to protrude along the edge of the body.

In addition, at least one connection ring is formed to protrude along the edge of the body, and one side of the body is formed by stepped depressions corresponding to the connection ring, and at least one non-slip groove is formed on the upper side of the body. do.

On the other hand, the buoy as described above, the body portion of the body through the foam bead injection tube inserted into one side of the blow mold in a state that the body of the synthetic resin material in the blow mold integrally seated in the blow mold By injecting the foam beads, it can be produced by a buoy manufacturing method, characterized in that to form a foam inside the body.

At this time, through the foam bead injection tube, steam for heating the foam beads to form a foam is injected with the foam beads.

In addition, the foam beads, the pre-heating step of forming the pre-foamed beads by heating the raw material beads in the pre-foaming machine, the heating step of heating the pre-foamed beads again by a boiler provided on one side of the pre-foaming machine to form the foamed beads , And the foam beads, which have been subjected to the heating step, are put into a furnace provided on one side of the pre-foaming machine, and then dried and matured.

In addition, the foam bead injection tube is movable relative to the blow mold by a moving cylinder provided on one side of the blow mold.

According to one embodiment of the present invention, it is possible to easily produce a buoy excellent in mechanical strength and seawater barrier properties, there is an effect that the productivity is improved.

Hereinafter, a preferred embodiment of the buoy and its manufacturing method according to an embodiment of the present invention will be described with reference to the accompanying drawings. In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of description.

In addition, terms to be described below are terms defined in consideration of functions in the present invention, which may vary according to the intention or convention of a user or an operator. Therefore, definitions of these terms should be made based on the contents throughout the specification.

In addition, the following examples are not intended to limit the scope of the present invention but merely illustrative of the components set forth in the claims of the present invention, which are included in the technical spirit throughout the specification of the present invention and constitute the claims Embodiments that include a substitutable component as an equivalent in the element may be included in the scope of the present invention.

Example

1 is a perspective view of a buoy according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of a buoy according to an embodiment of the present invention, and FIG. 3 is a use state in which a plurality of buoys are connected to each other according to an embodiment of the present invention. Figure 4 is a side view of the manufacturing equipment for manufacturing a buoy according to an embodiment of the present invention, Figure 5 is a plan view of the manufacturing equipment for manufacturing a buoy according to an embodiment of the present invention, Figure 6 is a Partial schematic diagram of a manufacturing facility according to one embodiment.

As shown in FIG. 1 and FIG. 2, the buoy 10 according to an embodiment of the present invention includes a body 20 having a space 21 therein and a space 21 of the body 20. Foam 30 that is foam filled.

Here, as shown in FIG. 2, the body 20 is blow molded to form a space 21 therein as a synthetic resin material, and is generally hexahedral.

At this time, the at least one connection ring 22 is formed to protrude outwards along the edge of the body 20, both sides and the front of the body 20, and both sides and the rear edge of the body 20 meet each other It is preferable that four connecting rings 22a to 22d protrude from each other one by one.

The connecting ring 22 is to allow the plurality of bodies 20 to be connected to each other by a connecting pin 23 or a rope (not shown), Figure 3 is a plurality of bodies 20 as described above It is connected to each other, and when the plurality of bodies 20 are connected to each other, so that the upper side of the body 20 can be connected to each other flat, each connecting ring 22 is preferably formed at different heights, respectively Do.

That is, for example, when four bodies 20 are connected by one connecting pin 23, as shown in FIG. 3, the connecting pins 23 sequentially pass through the four connecting rings 22a to 22d. These connecting rings 22a to 22d are formed at different heights, and are stacked one by one without disagreeing with each other.

In addition, at least one bent portion 24 is formed along the rim of the body 20, which bends 24 together with the strength reinforcement of the body 20, when the rope is wound around the buoy 10 to be fixed. It is to prevent the flow of the rope, and when the plurality of bodies 20 are connected to each other to be firmly coupled to each other, it is preferable that the bent portion 24 of the trapezoidal cross-sectional shape on the front and rear and both sides are formed vertically, respectively. .

In addition, the four vertices in the upper side of the body 20, as shown in Figure 3, when the connection pin 23 is fastened to the connecting ring 22 is sandwiched between the upper side of the body to be supported It is preferable that the quarter portion-shaped depression 25 is formed to be stepped, and the upper surface has a non-slip groove 26 of the grid shape so that a plurality of the body 20 is connected when the body 20 It is desirable to allow the operator to move without slipping on the upper side of the). At this time, it is a matter of course that the shape of the depression 25 can be changed according to the shape of the connection pin (23).

The foam 30 is filled in the inner space 21 of the blow molded body 20. At this time, one side of the body 20 is provided with a foam bead injection hole 27 communicated to the space portion 21, the foam bead is injected through the foam bead injection hole 27, such as expandable polystyrene resin In (21) it is foamed and filled.

Therefore, the buoy 10 according to an embodiment of the present invention, since the body 20 is formed of a synthetic resin material, and excellent durability and wear resistance and seawater barrier property, the foam portion 30 in the interior space 21 By filling, even if a part of the body 20 is broken, unlike the buoy of the conventional hollow synthetic resin material, the buoyancy is maintained by the foam 30, the body 20 is a separate coupling member By integrally molding so as not to be necessary, it is possible to reduce the risk of breakage due to the fragility of the engaging portion.

As described above, the buoy 10 is blow molded integrally with the synthetic resin body 20 in the blow mold 500 to be described later, and the body 20 is not separated from the blow mold 500. Through the foam bead injection pipe 520 provided on one side of the blow mold 500, the foam beads are injected into the space 21 inside the body 20 together with steam, and the residual heat and the foam beads in the blow molding process. By the heat of the steam injected together with the foam beads can be produced by a method of forming the foam 30 in the body 20 by foaming and filling.

4 to 6, the buoy 10 according to an embodiment of the present invention may be manufactured through the following steps.

Preheating Step

Raw material beads formed by impregnating 5 to 7 wt% of a blowing agent such as propane, butane or pentane in the polystyrene resin are filled and heated in the pre-foaming device 200 by the raw material input device 100, thereby preliminary foaming beads having a predetermined expansion ratio. Is formed.

Heating stage

The pre-foamed beads are heated and foamed again by the steam heat of the boiler 300 installed at one side of the pre-foam 200, thereby forming foam beads.

Drying stage

Foam beads of the pre-foaming device 200 is sent to the silo along the siro injection line 210, and aged and dried in the siro 400 for a predetermined time.

This is to prevent the condensation caused by atmospheric pressure after mold release due to the high pressure of the molded product when the molded product in this state becomes a reduced pressure in the foam beads by condensing the steam according to the temperature decrease immediately after foaming. Air is introduced into the foam to dry the foam beads and at the same time the blowing agent is properly diffused.

Blow molding step

The body 20 of the synthetic resin material is blow molded in the blow mold 500 manufactured in a predetermined shape, in which foam bead injection hole 27 is formed at one side of the body 20.

Foam Bead Injection Step

The foam beads stored in the siro 400 are transferred to the bead dosing device 600 along the bead transfer line 410, and the bead injection line is formed by the bead dosing device 600 installed on the blow mold 500. 610 is injected into and filled into the space 21 of the body 20 seated in the blow mold 500.

In this case, as shown in FIG. 6, a moving cylinder 510 is installed at a lower portion of the blow mold 500, and the foam bead injection pipe 520 is lifted and lowered into the blow mold 500 by the moving cylinder 510. While being insertable, the bead injection line 610 is connected to the foam bead injection pipe 520.

On the other hand, one side of the bead injection line 610 is connected to the steam line 310 is connected to the boiler 300, so when the foam beads are injected into the blow mold 500 along the bead injection line 610, Steam is injected together, and the foaming beads are expanded by the heat and steam heat of the blow mold 500 itself.

At this time, the vacuum apparatus 700 installed on one side of the moving cylinder 510 includes a vacuum tank 710 and a vacuum pump 720, and the inside of the blow mold 500 during the blow molding of the body 20 in a vacuum state It is a facility used to cool the inside of the blow mold 500 in the cooling, mold release step to make or as described later.

Here, the foaming process of the foam beads, seemingly seem to be filled with the foam beads in the blow mold 500, but the empty space between the foam beads is about 40% of the volume of the total foam beads filled.

The empty space is filled while the resin of the foam beads is softened by steam heat of about 108 to 116 ° C. injected into the mold, and the foaming agent is vaporized and expanded to foam into a foam made of a very thin polystyrene resin film.

In this case, the foam 30 is formed along the shape of the space portion 21 of the body 20 by thermally fusion of the surfaces of the foam bead particles by the heat of steam.

Cooling and Release Step

After the foam 30 is completely foamed and filled in the space 21 of the body 20, the vacuum pump 720 is operated to discharge steam to the outside through the discharge line 711 and to blow the blow mold 500. Cool and remove the buoy 10 from the blow mold 500.

The manufacturing process as described above can be automated by controlling the opening and closing of valves installed in each line by the control box 800 provided on one side of the manufacturing equipment, buoy according to an embodiment of the present invention According to the manufacturing method of (10), immediately after the blow molding of the body 20, the foam 30 can be formed in the space portion 21 of the body 20, thereby reducing the production cost and time to improve productivity It works.

Meanwhile, reference numeral 910, which is not described, refers to a pair of rails installed at the bottom of the workplace for the movement of the blow molding equipment 900 including the blow mold 500.

1 is a perspective view of a buoy according to an embodiment of the present invention.

2 is a cross-sectional view of a buoy according to an embodiment of the present invention.

Figure 3 is a state diagram used to connect a plurality of buoys in accordance with one embodiment of the present invention.

4 is a side view of a manufacturing facility for manufacturing a buoy according to an embodiment of the present invention.

5 is a plan view of a manufacturing facility for manufacturing a buoy according to an embodiment of the present invention.

6 is a partial schematic view of a manufacturing facility according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

10: buoy 20: body

21: space part 22: hook for connection

23: connecting pin 24: bend

25: depression 26: non-slip groove

27: foam bead injection hole 30: foam

100: raw material input device 200: pre-expander

300: boiler 400: between

500: blow mold 600: bead dosing device

700: vacuum device 800: control box

Claims (11)

delete delete delete delete delete delete delete Integrally blow molding the body of synthetic resin in the blow mold; Injecting the foam beads into the space of the body through the foam bead injection tube inserted into one side of the blow mold while the body is seated in the blow mold; Forming a foam inside the body, The foam beads, A preheating step of forming the prefoam beads by heating the raw material beads in the prefoam; A heating step of heating the pre-foamed beads again by a boiler provided at one side of the pre-foam, to form foam beads; Buoy manufacturing method characterized in that it is manufactured by the drying step of drying, aging by adding the foam beads after the heating step between the provided on one side of the prefoam. The method according to claim 8, Through the foam bead injection tube, steam for heating the foam beads to form a foam is injected with the foam beads, Said foam bead injection tube is buoy manufacturing method characterized in that the movable mold with respect to the blow mold by a movable cylinder installed on one side of the blow mold. A buoy prepared by the method according to claim 8 or 9, wherein the raw material beads are 5 to 7 wt% of a blowing agent and the rest is made of a polystyrene resin. The method according to claim 10, The body buoy characterized in that it has at least one connection ring protruding along the rim.

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