KR101914596B1 - Eco friendly buoy for foam molding and its manufacturing method - Google Patents

Abstract

The present invention relates to an eco-friendly buoy for foam molding and a manufacturing method thereof and, more specifically, to an eco-friendly buoy for foam molding, which is molded through a process of coating a foam body with a coating member in a mold, wherein the foam body is formed by molding a half thereof to form a plurality of hollows therein and then being integrally formed in a cylindrical shape by butt in a state of being double-molded from the outside; and a manufacturing method thereof. The eco-friendly buoy is foamed with expanded polypropylene to form a hollow inside and have fixing grooves on both sides of the outer diameter thereof, is molded in half, is melt-bonded with each other with an adhesive, and coated with a coating member on the outer surface thereof. The present invention foams an inner hollow forming foam body (21), which forms a hollow (24) with a transverse reinforcement band (22) and a plurality of longitudinal reinforcement bands (23), with expanded polypropylene; foams an outer foam body (25) on the outer diameter with expanded polypropylene by supplying the inner hollow forming foam body (21); bonds the outer foam body (25) to be formed in a cylindrical shape; coats the outer foam body (25) with a coating member (40) wherein the coating member (40) is formed into polypropylene and is stretched and welded with a two-line weld line (42) at a welding part (41); thermally shrinks the coating member (40) by heat from a mold heating device in a coating mold; and integrally wraps and fixes the outer foam body (25) by the coating member (40). The eco-friendly buoy of the present invention is able to provide rigidity against wave and shock since an outer diameter of a cylindrical foam body is coated with a coating member made of polypropylene.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an eco-friendly buoy for foam molding,

The present invention relates to an eco-friendly buoy for foam molding and a method of manufacturing the same, and more particularly, to an eco-friendly buoy for foaming and a method of manufacturing the same, The present invention relates to an eco-friendly buoy for foaming molding and a method of manufacturing the eco-friendly buoy by molding a coating member on a mold by coating.

It is also called an anchor buoy, a buoy buoy, a can buoy, a lighted buoy, a mooring buoy, a nun buoy, Landmark markings, net markings, etc., including various types of aquaculture fisheries including aquaculture, buoy, spar buoy, life buoy, etc., It is installed to warn the existence of dangerous materials, and is connected to the sea floor by chains so as not to drift away. In particular, light fixtures are installed for nighttime use and are called light buoys.

It is also used to indicate the location of objects in water, such as fishing gear and anchors.

On the other hand, in the prior art of buoy manufacture, it has been proposed to mix synthetic resin raw materials such as EVA and PVC with common additives such as foaming agents and crosslinking agents, to make the mixed raw materials into a plate-shaped molded body, , Filling the burr chip with a buoyant mold to be manufactured, pressurizing and heating it to produce a buoy of a desired shape, and a method of manufacturing an EPS foam bead, which is a kind of synthetic resin foam beads, Filling and expanding molding processes.

Recently, eco-friendly buoys have been proposed for coating the outside diameter of buoys for the purpose of preventing them from becoming a main cause of marine pollution in recent years. Conventionally, eco-friendly buoys have been proposed in which the entire outer surface of the styrofoam buoy is coated with a cylindrical polyethylene sheet .

However, these eco-friendly buoys have the effect of preventing damage to the oceans, but since they are made of styrofoam, they can cause pollution of the oceans, so that they can not be used in the case of small eco-friendly buoys.

In order to solve such a problem, Patent Registration No. 1155877 (registered on June 06, 2012) has a configuration in which two shaping films of a certain shape of polypropylene are placed facing each other, and polypropylene foam The cover molding film is manufactured by changing the temperature in consideration of the melting point and the conventionality with the softening point. Also, when forming the molding film for the cover, the molding film is formed according to the thickness and material of the film. Is changed to the most stable temperature.

However, since the inside of the buoy is kept in a certain shape, the loss of buoyancy is increased after coating, and after the buoys are integrally formed, the connecting portion of the forming film is easily separated by the waves and impact, And this exposure has caused pollution of the environment.

Also, Patent Registration No. 1599258 (registered on Feb. 25, 2016) discloses a foam having an accommodation space formed therein and having an engagement groove formed at an interval around the outer surface to be fixed to the fixing member through a wire, And a protective layer formed on the entire outer surface of the foam and preventing the foam from being damaged from waves or storms.

However, since the protective layer formed on the outer side of the foam melts to form the outer surface of the foam, the same material is foam-molded, and the outer surface is once again molded to melt the foam to form a protective layer. There was a drawback that it was not easily damaged.

Particularly, in the conventional buoy, if one of the parts is damaged, the sea water directly penetrates into the inside of the buoy, and the buoyancy is lost. Therefore, the buoy is damaged or the new one must be replaced. There is a drawback that it occurs largely.

(Document 1) Patent Registration No. 1155877 (registered on June 06, 2012) (Document 2) Patent Registration No. 1599258 (Registered on Feb. 25, 2016) (Document 3) Patent registration No. 1758225 (registered on July 7, 2017) (Document 4) Patent Registration No. 1246931 (Registered on Mar. 18, 2013)

Accordingly, it is an object of the present invention to solve the above-described drawbacks of the prior art, and an object of the present invention is to provide a method for producing a foamed foamed product, which comprises foaming an inner hollow foamed foam using foamed polypropylene, forming an outer foam on the outer diameter, And an object of the present invention is to provide an eco-friendly buoy capable of providing a very strong stiffness against waves and impacts by coating the outer diameter of a cylindrical foam with a coating member made of polypropylene.

Another problem to be solved by the present invention is to provide a method for molding a hollow foamed body and an outer foamed body by molding the hollow foamed body and the outer foamed body so as to be bisected, The buoyancy is maintained as it is.

The present invention is an eco-friendly buoy, in which a hollow is formed in the inside and a half is formed by foaming with foamed polypropylene so as to form fixing grooves on both sides of the outer diameter, and then fused with an adhesive to coat the outer side with a coating member,

Forming a hollow foamed foaming body by hollow foamed polypropylene which forms hollows by a horizontal reinforcing bar and a plurality of longitudinal reinforcing bars, forming the foamed outer foamed product by foaming the outer foamed foam to an outer diameter by feeding the foamed inner foamed product, Is formed into a cylindrical shape, and is formed into polypropylene. After stretching, a coating member, which is welded with a two-line weld line at the welded portion, is coated on the outer foamed member. The coating member is heat-shrunk by heating from a mold heating apparatus And is wrapped and fixed integrally.

The present invention relates to a method for producing a foamed polypropylene foam, which comprises foaming an inner hollow molded foam to have a predetermined thickness and a plurality of hollows, forming an outer foam on the outer diameter again to improve rigidity, The outer diameter of the foam of the present invention is coated by using a coating member made of polypropylene to provide a strong stiffness against waves and impacts, thereby providing a stable installation state and function of an environmentally friendly buoy for a long time.

The present invention relates to a method for molding a hollow foamed body and an outer foamed body by molding the hollow foamed body and the outer foamed body so as to divide the body into two parts, Through the three-layer structure as a whole, it is possible to maintain the same without loss of buoyancy even if a layer is damaged by waves or impacts.

1 is a perspective view showing a preferred embodiment of the present invention.
Figure 2 is a front view of a molded state mold for an internal blow molded foam of the present invention;
3 is a front view of the inner blow molded foam of the present invention
4 is a side cross-sectional view of the inner blow molded foam of the present invention
5 is a front view of a molded state mold for the outer foam of the present invention
6 is a front view of the outer foam of the present invention
7 is a side cross-sectional view of the outer foam of the present invention
8 is a side view of the internal blow-molded foam of the present invention in a state of being joined to the external foam in a cylindrical shape
9 is a front sectional view showing a state in which the connecting member is joined to the outer diameter of the outer foam of the present invention
10 is a front sectional view showing a state in which the connecting member is joined to the outer diameter of the outer foam of the present invention
11 is a side view showing a state in which the connecting member is joined to the outer diameter of the outer foam of the present invention
Fig. 12 is a perspective view showing a state in which the internal blow-molded foam of the present invention and the external foam are molded,
13 is a perspective view showing a state in which the eco-friendly buoy of the present invention is completed;
14 is a front view showing a state in which the environmentally friendly buoy of the present invention is completed;
Fig. 15 is a block diagram showing a state in which the eco-friendly buoy is molded according to the present invention
16 is a block diagram of another embodiment of a state in which the eco-

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view illustrating a preferred embodiment of the present invention. FIG. 1 is a perspective view showing a preferred embodiment of the present invention. FIG. 1 is a cross- Thereby forming an eco-friendly buoy 20. The two-line weld line 42 is formed at the welding portion of the coating member 40 to coat the entire surface.

FIG. 2 is a front view of a molded state mold for the internal blow molded foam of the present invention, FIG. 3 is a front view of the internal blow molded foam of the present invention, and FIG. 4 is a side sectional view of the internal blow molded foam of the present invention will be.

Foamed polypropylene (EPP) is fed to the inner foam molding space 12 formed inside the foam molding die 10 having the inner molding 11 at regular intervals and then heated by heating the mold heating device 30 Forming an internal blow-molded foam (21) through foaming;

A plurality of rectangular hollows 24 are formed through the longitudinal reinforcing bars 23 at regular intervals from the central transverse reinforcement strip 22, and the inner hollow-shaped foamed bodies 21 are formed to be half of the entire cylindrical shape. , And is formed so as to have a constant thickness on the entire outer surface.

FIG. 5 is a front view of a molded state mold for an external foam of the present invention, FIG. 6 is a front view of the external foam of the present invention, and FIG. 7 is a side sectional view of the external foam of the present invention.

The foamed polypropylene (EPP) is supplied to the outer foam molding space 13 after the inner blow molded foam 21 is supplied to the outer foam molding die 10a and then heated by the mold heating device 30, The outer foam 25 corresponding to the thickness of the outer foam molding space 13 is formed on the entire outer surface of the inner hollow foamed body 21. [

The outer foam 25 is formed such that the fixing grooves 26 are formed in a concavo-convex shape on both sides and are fixed by a fixing strap so as not to be separated.

FIG. 9 is a front sectional view showing a state in which the connecting member is coupled to the outer diameter of the outer foam of the present invention. FIG. 10 is a sectional view showing the outer side of the outer foil of the present invention FIG. 11 is a side view showing a state in which the connecting member is joined to the outer diameter of the outer foam of the present invention. FIG.

The outer foaming body 21 is molded integrally with the outer diameter of the inner blow-molded foam body 21 so as to face each other, and then supplied to the buoy foam molding die 10b to form a cylindrical integral foam by heating and pressing .

An adhesive is supplied between the inner and outer foamed foams 21 and 25 to form an integral body or a part where the inner foamed foam 21 and the outer foamed body 25 meet is heated by a heating plate, So that they are integrally fused.

The coating member 40 formed by coating polypropylene (PP) on both sides of the woven web 43 made of polypropylene (PP) is stretched by 15 to 45% in a drawing apparatus in which a plurality of rollers are formed The outer foaming member 25 and the coating member 40 are supplied to the coating member supply space 110 of the buoyant foam molding die 10b while being coupled to surround the outer diameter of the outer foam member 25, The coating member 40 stretched in the coating member supply space 110 of the buoyant foam molding die 10b is heated and shrunk by being supplied with the heat source so that the outer foam 25 is integrally wrapped and coated.

FIG. 12 is a perspective view showing a state in which an inner hollow molded foam of the present invention and an outer foam are molded, FIG. 13 is a perspective view showing a state in which the environmentally friendly buoy of the present invention is completed, and FIG. Front view.

When the foam 24 is molded through the outer foam 25 covering the entire surface to have a constant thickness with the outer diameter of the hollow foamed body 21 through which the hollow 24 is formed through the transverse reinforcement 22 and the longitudinal reinforcing bar 23, The coating member 40 is heated to cover the outer foaming member 25 in a heat-shrinkable manner by heating to form the environmentally friendly buoy 20.

The coating member 40 is welded in two lines through a two-line weld line 42 and the side surfaces of the environmentally friendly buoy 20 are integrally or separately formed into separate circular plates .

Accordingly, the eco-friendly buoy 20 is molded so as to provide buoyancy through the inner hollow-shaped foamed body 21 so that the entire outer side is formed into an integral body by the outer foam 25, and then the coating member 40 is coated, The triple structure greatly improves the stiffness to withstand external impacts and impacts caused by strong winds and waves. Even if the outer skin is damaged, water does not penetrate into the interior, so buoyancy can be maintained for a long time and foamed polypropylene EPP) to prevent parts from being broken and to pollute the seas and to enable recycling.

The present invention having such a configuration will be described in more detail with reference to the accompanying drawings, which are also referred to as a block diagram of FIG. 15 and FIG.

end. Inside foam molding step (S10)

The foamed polypropylene (EPP) is supplied to the inner foam molding space 12 of the foam molding die 10 to supply a heat source by heating from the mold heating device 30 to melt foam the expanded polypropylene (EPP) (22) and the vertical reinforcing bar (23) to form an inner hollow-shaped foamed body (21) in which a plurality of hollows (24) are formed.

I. External foaming step (S20)

The molded inner blow-molded foam 21 is supplied to the outer foam molding die 10a and foamed polypropylene (EPP) is supplied to the outer foam molding space 13 to supply a heat source from the mold heating device 30 (EPP) is melted and foamed so as to be wrapped to a whole thickness of the entire surface of the internal blow-molded foam 21, and the outer foam 25 having the concave-convex shape of the fixing protrusions 26 is formed on both sides .

All. Foam bonding step (S30)

So that the outer foam 25 is molded on the outer side of the inner blow-molded foam 21 so as to face each other, and the foam is superimposed on one another by using an adhesive or a melting method. .

la. The coating member forming step (S40)

A sheet formed by coating polypropylene (PP) to a predetermined thickness on both sides of the knitting fabric 43 formed by weaving in the transverse direction and the longitudinal direction was supplied to a stretching device to stretch 15 to 45% And welded at the weld line 42 so as to enclose the foam.

hemp. The coating member supplying step (S50)

The coating member 40 is covered with the outer diameter of the foam and is supplied to the coating member supply space 110 of the buoyant foam molding die 10b.

bar. Foam coating step (S60)

The heat-shrinkable coating member 40 is heat-shrunk by supplying a heat source from the mold heating device 30 to cover the entire surface of the foam, and the foam is integrally wrapped and coated to form the environmentally friendly buoy 20. [

The coating member addition welding step (S70)

After separating the eco-friendly buoy 20 from the billet foam molding die 10b, the two-row weld line 42 is pressed using a roller so that the weld 41 of the coating member 40 is normally welded, The molten polypropylene (PP) is supplied to the tip of the extruder to perform additional welding.

end. Foam forming step (S100)

A foamed polypropylene (EPP) of a foam molding die 10 is supplied and a heat source by heating is supplied from a mold heating device 30 to melt foam the foamed polypropylene (EPP) To form a cylindrical foam.

I. Coating member forming step (S200)

A sheet formed by coating polypropylene (PP) to a predetermined thickness on both sides of the knitting fabric 43 formed by weaving in the transverse direction and the longitudinal direction was supplied to a stretching device to stretch 15 to 45% And welded at the weld line 42 so as to enclose the foam.

All. The coating member supplying step (S300)

The coating member 40 is covered with the outer diameter of the foam and is supplied to the coating member supply space 110 of the buoyant foam molding die 10b.

la. Foam coating step (S400)

The heat-shrinkable coating member 40 is heat-shrunk by supplying a heat source from the mold heating device 30 to cover the entire surface of the foam, and the foam is integrally wrapped and coated to form the environmentally friendly buoy 20. [

hemp. The coating member further welding step (S500)

After separating the eco-friendly buoy 20 from the billet foam molding die 10b, the two-row weld line 42 is pressed using a roller so that the weld 41 of the coating member 40 is normally welded, The molten polypropylene (PP) is supplied to the tip of the extruder to perform additional welding.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

The present invention relates to a process for producing a foamed polypropylene, which comprises supplying foamed polypropylene to foam, forming an outer foamed body, further molding an outer foamed body, and bonding the cylindrical molded body to the foamed body, The present invention provides a very useful invention that provides a very strong stiffness to an external impact by molding a buoy and does not deteriorate buoyancy even when the coating member is damaged, and can be used for a long time.

10: foam molding die 10a: outer foam molding die
10b: buoy foam molding die 11: internal molding body
12: inner foam molding space 13: outer foam molding space
20: Environmentally friendly buoy 21: Inner hollow blowing foam
22: horizontal reinforcement 23: vertical reinforcement
24: hollow 25: outer foam
26: Fixing groove 30: Mold heating device
40: coating member 41: welded part
42: 2-line weld line 110: coating member supply space

Claims (5)

Wherein a hollow is formed in the inner part of the outer foil, and the outer foil is foamed with foaming polypropylene so as to form a fixing groove on both sides thereof,
The inner hollow molding foam 21 forming the hollow 24 by the horizontal reinforcing bar 22 and the plurality of vertical reinforcing ribs 23 is foamed with foaming polypropylene and molded to supply the inner hollow molding foam 21, The outer foam 25 is foam molded into foamed polypropylene and then the outer foam 25 is formed into a cylindrical shape by being joined and molded and formed into polypropylene and stretched. Thereafter, the two-row weld line 42 is welded Wherein the coating member (40) is covered with the outer foam (25), and the coating member (40) is thermally shrunk by heating from the mold heating device in the coating mold to integrally enclose the outer foam (25) Eco friendly buoy for.
The method according to claim 1,
The inner blow-molded foam 21 is formed by foaming foamed polypropylene and formed with a horizontal transverse reinforcement 22 at the center thereof. The longitudinal reinforcing bars 23 are formed at regular intervals to form a cylindrical half so that the hollow 24 is installed. Eco-friendly buoy for foam molding.
The method according to claim 1,
The outer foam 25 is formed into a foamed polypropylene so as to surround the outer surface of the inner blow-molded foam 21, and a fixing groove 26, on which the rope is fixed on both sides, forms a cylindrical half, The eco-friendly buoy for foam molding is characterized in that it is formed into a cylindrical shape by fusion bonding by an adhesive and heating.
The method according to claim 1,
The coating member 40 is formed by coating polypropylene on both sides of a polypropylene knitted fabric 43 and then forming it into a cylindrical shape by 15 to 45% stretching to form a two-row weld line 42 in the welded portion 41, , And is heat-shrunk along the outer shape of the outer foam (25) by heating to be fixed integrally with the eco-friendly buoy.
The foamed polypropylene (EPP) is supplied to the inner foam molding space 12 of the foam molding die 10 to supply a heat source by heating from the mold heating device 30 to melt foam the expanded polypropylene (EPP) (10) for forming an inner hollow-shaped foamed body (21) in which a plurality of hollows (24) are formed through a vertical rib (22) and a vertical ribs (23);
The molded inner blow-molded foam 21 is supplied to the outer foam molding die 10a and foamed polypropylene (EPP) is supplied to the outer foam molding space 13 to supply a heat source from the mold heating device 30 (EPP) is melted and foamed so as to cover the entire surface of the internal blow-molded foam 21 with a predetermined thickness and the external foams 25 are formed on both sides of the external foams 25, Foam molding step S20;
The outer foams 25 are formed on the outer side of the inner blow-molded foam 21 so that they are opposed to each other and are pressed together by using an adhesive or a melting method so as to be superimposed on each other, (S30);
A sheet formed by coating polypropylene (PP) to a predetermined thickness on both sides of the knitting fabric 43 formed by weaving in the transverse direction and the longitudinal direction was supplied to a stretching device to stretch 15 to 45% Forming a coating member (S40) to be welded at the weld line (42) so as to surround the foam;
A coating member supply step (S50) in which the coating member (40) is covered with the outer diameter of the foam and is supplied to the coating member supply space (110) of the buoyant foam molding die (10b); And
A foam coating step S60 for forming an environmentally friendly buoy 20 by coating the entire surface of the foamed body by coating the stretched coating member 40 by supplying a heat source from the mold heating device 30 by heating, ); The method of manufacturing eco-friendly buoys for foam molding according to claim 1,

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