KR102215917B1 - Buoy and there of manufacturing mold - Google Patents

Abstract

The present invention makes it easy and quick to be performed around the inner core rope (R2) during the initial winding operation of the synthetic resin foam sheet (S), and at the same time, the external exposure rope (R1) is buoyed through the inner core rope (R2). It relates to a buoy that can be integrated with V) to maintain a more robust and safe bonded state to ensure the life of the buoy and its manufacturing mold.

Description

Buoy and its manufacturing mold {BUOY AND THERE OF MANUFACTURING MOLD}

The present invention relates to a buoy and a mold for manufacturing the same, and more particularly, to facilitate and quickly perform the initial winding operation of the synthetic resin foam sheet centering on the inner core rope, and at the same time, the external exposure rope is buoyed through the inner core rope. It is to provide a buoy and a mold for its manufacture that can be integrated with and maintain a more robust and safe bonded state to ensure life span.

In general, buoys are installed to fix the facilities of aquaculture farms and to indicate the route or to warn of the presence of nautical dangerous substances such as reefs and sunken ships to assist the safe navigation of ships, and to hold fishing nets or to mark the location of fishing nets. It is used for various purposes, such as being used to float an aquatic solar power facility on the water.

Among the buoys, styrofoam buoys are the most widely used.Styrofoam buoys are easily damaged due to poor durability, and are not only difficult to collect and process because they are crushed into granules, and it leads to the death of animals such as fish and birds that are mistaken for food, destroying the marine ecosystem. And damage to the natural landscape, which has a significant negative impact on the marine environment.

1A is a front view of a Styrofoam buoy for molding Prior Art Document 1 (Korea Patent Publication No. 1600525; an eco-friendly buoy wrapped around a Styrofoam and a manufacturing method thereof), and FIG. 1B is a front view of a Styrofoam buoy. It is a front cross-sectional view of a state contracted along the outer diameter of the Styrofoam buoy, and FIG. 1C is a perspective view of a completed state of the eco-friendly buoy of Prior Art Document 1.

Prior Art Document 1 is to form a high-density Styrofoam buoy 10 by foaming in a mold by supplying a polyethylene raw material as shown in FIGS. 1A to 1C, and the high-density Styrofoam buoy 10 is a cylindrical body 11 A bending groove 12 capable of fixing the rope on both sides is formed, and a side surface 13 formed to have a rounded corner outside the bending groove 12 is formed.

The eco-friendly buoy 50 for forming by wrapping the entire outer diameter of the Styrofoam buoy 10 is a body cover 30 that is integrally bonded to the inner part of the body 11 and the bent groove 12 and the side 13 Done.

The body cover 30 is formed into a sheet shape to have a thickness of 0.8 to 2.8 mm by extruding a synthetic resin.

However, prior art document 1 also has a problem that the high-density styrofoam buoy 10 is easily damaged when the body cover 30 is damaged, which is the main cause of environmental pollution, and in particular, the bent groove 12 formed outside the cylindrical body 11 ), the rope can be fixed to the body 11 and the rope is easily separated when the rope is tied loosely or becomes loose due to seawater.

2A is a perspective view showing a foamed buoy according to Prior Art Document 2 (Korean Patent Publication No. 2016-0089904; eco-friendly foaming buoy), and FIG. 2B is a foamed buoy according to an embodiment of Prior Art Document 2 It is an exploded perspective view shown.

As shown in Figs. 2a and 2b, the eco-friendly foaming buoy of Prior Art Document 2 overcomes the general technique that it is impossible to mold a product thicker than 100 mm with expanded polypropylene to manufacture a product with a diameter of 200 to 3000 mm. It consists of a buoyancy part 10 and a body part 20.

The eco-friendly foamed buoy 40 according to Prior Art Document 2 is formed by recessing the binding grooves 21 on both sides in a cylindrical shape, and has the same appearance as a general foamed polyethylene buoy.

The buoyancy part 10 is formed in a cylindrical shape, and a plurality of insertion holes 11 are formed in the buoyancy part 10, and the insertion hole 11 is formed long to penetrate both ends of the buoyancy part 10. .

The buoyancy part 10 is formed of a foamed polystyrene (EPS, styrofoam) material, and a waste PT bottle 30 is inserted into a plurality of insertion holes 11 formed in the center to generate more buoyancy.

The body portion 20 is molded to surround the outer periphery of the buoyancy portion 10, and the main body portion 20 is made of expanded polypropylene (EPP) particles, formed in a cylindrical shape, and binding grooves 21 on both sides of the outer periphery ) Is formed.

The body part 20 is formed to enclose the outer periphery of the buoyancy part 10 by the pressing force and vapor pressure after inserting the expanded polypropylene (EPP) particles in the foamed state while the buoyancy part is provided in the foaming mold.

However, prior art document 2 is composed of a complex structure in which the waste PT bottle 30 is inserted after forming the insertion hole 11 in the buoyancy part 10 for buoyancy, and productivity is significantly lowered, as well as the insertion hole 11 during use. ), the PT bottle 30 comes out and causes environmental pollution. In particular, the rope can be fixed to the binding groove 12 formed on the outside of the main body 20, so that the rope is loosely hung or seawater When loose due to the like, the body part 20 and the rope are easily separated, causing a problem of polluting the whole sea.

Republic of Korea Patent Publication No. 1600525; An eco-friendly buoy that wraps and molds a Styrofoam buoy and its manufacturing method Republic of Korea Patent Publication No. 2016-0089904; Eco-friendly foaming buoy

It is an object of the present invention to facilitate and quicken the initial winding work of the synthetic resin foam sheet centering on the inner core rope, and at the same time, the external exposure rope is integrated with the buoy through the inner core rope to provide a more robust and safe coupling state. It is to provide a buoy that can be maintained and guaranteed for a lifetime and a mold for its manufacture.

It is an object of the present invention to provide a buoy and a mold for manufacturing the same, in which the external exposure rope is integrated with the buoy through the inner core rope to maintain a more sturdy and safe bonded state to ensure the life of the buoy.

It is an object of the present invention to provide a buoy that can maximize buoyancy through the combination of air cells and spiral air pockets by forming a spiral air pocket along the interlayer boundary by winding a synthetic resin foam sheet confined by a surface fusion layer, and a mold for manufacturing the same. It is in the offering.

The object of the present invention is to improve productivity by completing the buoy by a simple process, and due to the characteristics of the foamed synthetic resin, that is, the synthetic resin foam sheet, the cushioning power is good, damage by impact is not prone to occur, and the lifespan is long to significantly prevent environmental pollution. It is to provide a buoy that can be done and a mold for its manufacture.

It is an object of the present invention to maximize the air content and to more actively realize buffer against external shocks by means of a spiral air pocket formed along the interlayer boundary by winding a synthetic resin foam sheet confined by a surface fusion layer. It is to provide a buoy and a mold for manufacturing the same, which can significantly eliminate self-damage and impact damage, as well as guaranteeing buoyancy.

It is an object of the present invention to provide a buoy and a mold for manufacturing the buoy that can prevent the buoy itself from easily escaping from the inner wick rope due to external impact or pull.

It is an object of the present invention to provide a buoy and a mold for manufacturing the same, which can be easily combined with an external general rope by consisting of an outer exposed rope in a ring shape connected to the inner core rope.

It is an object of the present invention to provide a buoy that can prevent water from seeping into the air cells in the synthetic resin foam sheet while the inner core rope is covered with a waterproof film, and a mold for manufacturing the same.

An object of the present invention is a buoy that can more thoroughly prevent the phenomenon that external water penetrates into the buoy by wrapping the inner wick rope and simultaneously spreading to both surfaces of the winding bundle and being integrated with the surface fusion layer. It is to provide a mold for its manufacture.

An object of the present invention is to ensure a stable withdrawal state of the external exposed rope when heat is applied to the winding bundle through the lower mold and the upper mold to complete a more robust and safe buoy, and furthermore, the under rope groove is the under left border and It is to provide a buoy and a mold for manufacturing the same, which is made up of a pair separated from the center of each of the under-right borders to ensure the closed shape of the external exposure rope.

An object of the present invention is a buoy capable of completing a buoy of various sizes by ensuring that the external exposure rope closed in a ring shape is bisected by the under-convex portion to ensure a closed-type distance of the external exposure rope by the length of the under-convex portion, and It is to provide a mold for its manufacture.

It is an object of the present invention to provide a buoy and a mold for manufacturing the buoy so that the buoyancy center of the buoy installed on the water surface can be made more safely by allowing the external exposure rope to be located on the center line when the buoy is divided into a longitudinal section at the center.

The present invention for achieving the above object,

In the buoy provided with a surface fusion layer by applying heat to the all-around surface of the winding bundle formed by winding a synthetic resin foam sheet,

The basic feature of the technical construction is that the synthetic resin foam sheet is wound with the inner core rope connected to the outer exposed rope at the center, and a spiral air pocket continuing from the inner core rope along the interlayer boundary of the synthetic resin foam sheet is included. .

The present invention for achieving the above object,

In the buoy provided with a surface fusion layer by applying heat to the all-around surface of the winding bundle formed by winding a synthetic resin foam sheet,

In the following technical configuration, an inner wick rope connected to an external exposed rope is interposed in the middle of a spiral air pocket provided along the interlayer boundary by winding of the synthetic resin foam sheet.

The present invention for achieving the above object,

The lower mold has an under mold space with an under front border, an under rear border, an under left border and an under right border, and an upper mold space with an upper front frame, upper rear border, upper left border and upper right border. In the mold for manufacturing a buoy including an upper mold.

The next feature of the technical configuration is that it includes an under rope groove provided on the under left edge and the under right edge, respectively, from the inside to the outside of the under mold space.

The present invention makes it easy and quick to perform the initial winding work of the synthetic resin foam sheet centering on the inner core rope, and at the same time, the external exposure rope is integrated with the buoy through the inner core rope to maintain a stronger and safer coupling state. There is an effect that can guarantee the lifetime.

In the present invention, the external exposure rope is integrated with the buoy through the inner wick rope, thereby maintaining a more robust and safe coupling state, thereby ensuring the lifespan.

The present invention has the effect of maximizing buoyancy through the combination of the air cells and the spiral air pocket by forming a spiral air pocket along the interlayer boundary by the winding of the synthetic resin foam sheet confined by the surface fusion layer.

The present invention can improve productivity by completing the buoy by a simple process, and due to the characteristics of the foamed synthetic resin, that is, the synthetic resin foam sheet, the cushioning power is good, damage by impact is not easily occurred, and the lifespan is long, so environmental pollution can be significantly prevented. There is an effect.

In the present invention, not only can the air content be maximized by the spiral air pocket formed along the interlayer boundary by winding of the synthetic resin foam sheet confined by the surface fusion layer, but also can more actively realize buffer against external impacts. In addition to ensuring buoyancy, there is an effect of remarkably eliminating self-damage and damage to the opponent.

The present invention has an effect of preventing a phenomenon in which the buoy itself easily escapes from the inner wick rope due to external impact or pull.

The present invention has an effect that the external exposure rope is made of a ring shape connected to the inner wick rope to facilitate coupling with an external general rope.

The present invention has the effect of preventing water from seeping into the air cells in the synthetic resin foam sheet while riding the inner wick rope by covering the inner wick rope with a waterproof film.

In the present invention, the waterproof film wraps the inner core rope and at the same time spreads to both surfaces of the winding bundle and is integrated with the surface fusion layer, so that the phenomenon of penetration of external water into the buoy can be prevented more thoroughly.

The present invention ensures a stable withdrawal state of the external exposed rope when heat is applied to the winding bundle through the lower mold and the upper mold, thereby completing a more robust and safe buoy. It is composed of a pair separated from the center of each of the right borders, and has the effect of ensuring the closed shape of the external exposure rope.

The present invention has the effect of completing the buoys of various sizes by ensuring the closed distance of the external exposure rope by the length of the under-convex part by allowing the external exposure rope closed in a ring shape to be bisected by the under-convex part.

The present invention has the effect of making the buoyancy center of the buoy installed on the water surface more secure by being positioned on the center line when the external exposure rope divides the buoy from the center to the longitudinal section.

1A is a front view of a Styrofoam buoy for molding Prior Art Document 1;
1B is a front cross-sectional view of a state in which the body cover of Prior Art Document 1 is contracted along the outer diameter of the Styrofoam buoy.
Figure 1c is a perspective view of a completed state of the eco-friendly buoy of Prior Art Document 1.
Figure 2a is a perspective view showing a foam-type buoy according to the prior art document 2.
Figure 2b is an exploded perspective view showing a foam type buoy according to an embodiment of Prior Art Document 2.
3A is an exploded perspective view showing a buoy and a mold for manufacturing the buoy according to the first embodiment of the present invention.
Figure 3b is a cut-away perspective view showing a buoy according to the first embodiment of the present invention.
4A is an exploded perspective view showing a buoy and a mold for manufacturing the buoy according to a second embodiment of the present invention.
Figure 4b is a cut-away perspective view showing a buoy according to a second embodiment of the present invention.

A preferred embodiment of the buoy according to the present invention and a mold for its manufacture will be described with reference to the drawings, and there may be a number of examples thereof, and the objects, features, and advantages of the present invention are better understood through these embodiments. You will be able to understand.

3A is an exploded perspective view showing a buoy and a mold for manufacturing the buoy according to the first embodiment of the present invention, FIG. 3B is a cut-away perspective view showing the buoy according to the first embodiment of the present invention, and FIG. 3C is a first embodiment of the present invention. A perspective view showing a buoy according to an embodiment, FIG. 4A is an exploded perspective view showing a buoy and a mold for manufacturing the buoy according to the second embodiment of the present invention, and FIG. 4B is a cut-away perspective view showing the buoy according to the second embodiment of the present invention And Figure 4c is a perspective view showing a buoy according to a second embodiment of the present invention.

The buoy (V) according to the first embodiment of the present invention is a surface fusion layer ( P) is prepared, and at this time, the synthetic resin foam sheet (S) is wound with the inner core rope (R2) connected to the external exposure rope (R1) at the center, and the inner core rope (R2) along the interlayer boundary of the synthetic resin foam sheet (S). It characterized in that it comprises a spiral air pocket (N) continuous from).

The buoy (V) according to the second embodiment of the present invention is a surface fusion layer ( P) is provided, and an inner core rope (R2) connected to the external exposure rope (R1) is interposed in the middle of the spiral air pocket (N) provided along the interlayer boundary by the winding of the synthetic resin foam sheet (S). It is characterized.

The synthetic resin foam sheet (S) is made to have independent air cells (A) by mixing a crosslinking agent and a foaming agent with PE, LDPE, PP, PVC or synthetic rubber and then foaming through a foaming furnace.

Specifically, PE (Polyethylene) is a thermoplastic resin, which has excellent chemical resistance, electrical insulation, moisture-proof, cold resistance, workability, and is commonly used as an insulating material. LDPE (Low Density Polyethylene) is a thermoplastic resin manufactured by polymerizing ethylene and is a transparent solid (density 0.91) at room temperature. It is used as a raw material for various wraps for agricultural and packaging transparent films due to its low crystallization as ∼0.94) and excellent flexibility and transparency, and PP (Polypropylene) is a thermoplastic resin obtained by polymerizing propylene, which is used in blankets, blankets, etc., and PVC (Polyvinyl chloride) is a thermoplastic plastic, polyvinyl chloride or vinyl chloride resin, used in a wide range of products such as film sheets, molded caps, etc. Synthetic rubber is a synthetic rubber-like substance or rubbery material that has similar properties to natural rubber. As a thermoplastic resin that can become an elastic body, it has elastic cold resistance, fire resistance, heat resistance, oxidation resistance, and chemical resistance, so it is used in the manufacture of wire coverings, shoes, stationery, and bags.

These PE, LDPE, PP, PVC, or synthetic rubber are mixed with 50wt% of a foaming agent (ADCA; azodicarbonamide) 25wt%, a crosslinking agent (DCP; Di Cumyl Peroxide) 3.8wt%, and further, an antibacterial agent made of zeolite zinc or silver 21.2wt%. By foaming through a foaming furnace, a synthetic resin foam sheet (S) having each of the independent air cells (A) can be prepared, and such a synthetic resin foam sheet (S) is formed by buoyancy by the air cells (A), thereby forming zeolite and zinc. Or, it is possible to purify water by using silver antibacterial agents.

In the present invention, the synthetic resin foam sheet (S) is wound to prepare a winding bundle (M), and then put into the lower mold (70) and the upper mold (80) to apply heat to form a surface fusion layer (P) to form a buoy (V). The surface fusion layer (P) is the heat of the lower mold 70 and the upper mold 80, for example, 150 ~ 250 ℃ (if lower than 150 ℃, the formation time of the surface fusion layer (P) is too high. If it takes a long time and is higher than 250℃, the surface of the winding bundle (M) is melted and fixed by the heat of the lower mold (70) and upper mold (80) of the surface fusion layer (P) is formed too deeply and the whole is hardened. A spiral air pocket is formed along the interlayer boundary by winding of the synthetic resin foam sheet (S) confined by the surface fusion layer (P). Air pockets connected continuously like a spiral along the line]; As N} is formed, the buoyancy can be maximized through the combination of the air cells (A) and the spiral air pocket (N), and in particular, the productivity can be improved by completing the buoy (V) through a simple process, and foamed synthetic resin In other words, due to the characteristics of the synthetic resin foam sheet (S), the cushioning power is good, damage by impact does not occur, and the lifespan is long so that environmental pollution can be significantly prevented. Can be significantly reduced].

By winding the synthetic resin foam sheet (S) confined by the surface fusion layer (P), the spiral air pocket (N) formed along the interlayer boundary can maximize the air content, as well as buffer against external impacts. As it can be actively realized, it is more desirable to ensure buoyancy as well as significantly eliminate self-damage and damage to the impact partner.

In particular, as shown in FIGS. 3A and 3B, in consideration of the difficulty of work during the initial winding of the synthetic resin foam sheet (S), in the first embodiment of the present invention, the synthetic resin foam sheet ( S) can be wound, so that the initial winding work of the synthetic resin foam sheet (S) is performed easily and quickly around the inner core rope (R2), and at the same time, the external exposure rope (R1) becomes the inner core rope ( It is more preferable because it is integrated with the buoy (V) through R2) to maintain a more robust and safe bonded state to ensure life span.

And, the buoy (V) according to the second embodiment of the present invention is a synthetic resin foam sheet (S) in the process of winding the synthetic resin foam sheet (S) to have a more air content as shown in Figs. 4a and 4b. ) To form a surface fusion layer (P) by applying heat to the all-around surface of the winding bundle (M) provided by interposing an inner wick rope (R2) in the middle of the spiral air pocket (N) provided along the interlayer boundary of ). Thus, the external exposure rope (R1) is integrated with the buoy (V) through the inner core rope (R2) to maintain a more robust and safe coupling state to ensure the life of the more desirable.

At this time, the inner wick rope (R2) further includes a convex hook (B), and the buoy (V) itself prevents the phenomenon that it easily escapes from the inner wick rope (R2) due to external impact or pull, and even Regardless of the presence or absence of the convex overhang (B), even if the buoy (V) itself is removed from the inner wick rope (R2), it remains inserted into the external exposure rope (R1) and the whole buoy (V) is lost to the sea. In addition, the external exposure rope (R1) is formed in a ring shape connected to the inner wick rope (R2) to facilitate coupling with an external general rope.

Furthermore, the inner core rope (R2) is covered with a waterproof film (F) to prevent water from seeping into the air cells (A) in the synthetic resin foam sheet (S) while riding the inner core rope (R2).

Preferably, the waterproof film (F) wraps the inner wick rope (R2) and at the same time spreads to both surfaces of the winding bundle (M) so that it is integrated with the surface fusion layer (P) so that the outside water is integrated into the buoy (V). It makes it possible to more thoroughly prevent penetration.

In this way, the mold for manufacturing a buoy according to the present invention for manufacturing the buoy V integrated with the inner wick rope R2 connected to the external exposure rope R1, as shown in Figs. 3B and 4B, the under front border 71 ), the lower mold (70) with the under mold space (75), with the under rear border (72), the under left border (73) and the under right border (74), and the upper front border (81), the upper rear border It includes an upper mold 80 having an upper mold space 85 while having an upper left edge 83 and an upper right edge 84.

In other words, in the state that the winding bundle (M) is put in the lower mold (70) and pressed with the upper mold (80), heat [for example, 150-250℃] is applied to separate the winding bundle through secondary foaming inside the winding bundle (M). Along with the formation of the air cell (A), the surface fusion layer (P) on the surface of the winding bundle (M) is formed together, thereby forming a spiral air pocket (N) along the interlayer boundary of the synthetic resin foam sheet (S) to form the air cell (A). ) And the spiral air pocket (N) can maximize the buoyancy, and in particular, the productivity can be improved by completing the buoy (V) by a simple process, and the foamed synthetic resin, that is, the synthetic resin foam sheet ( Due to the characteristics of S), the cushioning power is good, damage by impact does not occur, and the lifespan is long, so environmental pollution can be remarkably prevented [that is, damage in the form of grains such as styrofoam does not occur at all, so environmental pollution can be significantly reduced] , When the external exposure rope (R1) is exposed to the outside of the buoy (V) from the inner wick rope (R2) integrated in the buoy (V), it can be extremely easy to install the buoy (V) in the sea.

Preferably, the lower mold 70 includes an under-rope groove 70a provided on the under left edge 73 and the under right edge 74, respectively, from the inside to the outside of the under mold space 75, and the lower mold ( When heat is applied to the winding bundle (M) through the 70) and the upper mold (80), a more robust and safe buoy (V) is completed by ensuring a stable withdrawal state of the external exposure rope (R1). The rope groove (70a) is composed of a pair spaced apart from the center of each of the under left edge (73) and the under right edge (74) to ensure the closed shape of the external exposure rope (R1).

More preferably, the under mold has an under-convex portion (70b) rising from the center of the pair of under-rope grooves (70a), and the upper mold (80) is an upper concave portion (80b) that is incorporated into the under-convex portion (70b). ), so that the external exposure rope R1 closed in an annular shape is bisected by the under-convex portion 70b, so that the closed-opening distance of the external exposure rope R1 is equal to the length of the under-convex portion 70b. It can be guaranteed to complete the buoy (V) of various sizes.

Further, the upper mold 80 includes a pair of upper rope grooves (80a) facing each of the pair of under rope grooves (70a), when the buoy (V) is completed, the external exposure rope (R1) is a buoy ( When V) is divided into a longitudinal section at the center, it is desirable to be positioned on the center line, so that the buoyancy center of the buoy V installed on the water surface can be made more safely.

The present invention is installed to fix aquaculture facilities and to instruct a route to help safe navigation of a ship, or to warn of the presence of nautical dangerous substances such as reefs and sunken ships, and is used in industrial fields for floating aquatic solar facilities on the water. It is possible.

V: Buoy S: Synthetic resin foam sheet
M: winding bundle P: surface fusion layer
N: Spiral air pocket A: Air cell
R1: External exposure rope R2: Internal core rope
B: Convex part F: Waterproof film
70: lower mold 70a: under rope groove
70b: under convex portion 71: under front border
72: under rear border 73: under left border
74: under right border 75: under mold space
80: upper mold 80a: upper rope groove
80b: upper recess 81: upper front edge
82: upper rear border 83: upper left border
84: upper right border 85: upper mold space

Claims (10)

In the buoy provided with the surface fusion layer (P) by applying heat to the all-around surface of the winding bundle (M) formed by winding the synthetic resin foam sheet (S),
The synthetic resin foam sheet (S) is wound with the inner core rope (R2) connected to the external exposure rope (R1) at the center, and continues from the inner core rope (R2) along the interlayer boundary of the synthetic resin foam sheet (S). Including a spiral air pocket (N),
The external exposure rope (R1) is a buoy, characterized in that consisting of a ring shape connected to the inner core rope (R2). In the buoy provided with the surface fusion layer (P) by applying heat to the all-around surface of the winding bundle (M) formed by winding the synthetic resin foam sheet (S),
A buoy, characterized in that an inner core rope (R2) connected to the external exposure rope (R1) is interposed in the middle of the spiral air pocket (N) provided along the interlayer boundary by the winding of the synthetic resin foam sheet (S). The method according to claim 1 or 2,
The inner wick rope (R2) is a buoy, characterized in that it further comprises a convex hanging portion (B). The method of claim 2,
The external exposure rope (R1) is a buoy, characterized in that consisting of a ring shape connected to the inner core rope (R2). The method according to claim 1 or 2,
The inner wick rope (R2) is a buoy, characterized in that covered with a waterproof film (F). The method of claim 5,
The waterproof film (F) is a buoy, characterized in that it is integrated with the surface fusion layer (P) by wrapping the inner core rope (R2) and spreading to both surfaces of the winding bundle (M) at the same time. delete delete A lower mold 70 having an under mold space 75 while having an under front edge 71, an under rear edge 72, an under left edge 73 and an under right edge 74, and an upper front edge 81 In the buoy manufacturing mold comprising an upper mold 80 having an upper mold space 85 while having an upper rear edge 82, an upper left edge 83 and an upper right edge 84,
And an under rope groove (70a) provided on the under left edge (73) and the under right edge (74) from the inside to the outside of the under mold space (75),
The under rope groove (70a) is made of a pair spaced apart from the center of each of the under left edge (73) and the under right edge (74),
The under mold has an under convex portion 70b protruding from the center of the pair of under rope grooves 70a,
The upper mold 80 is a mold for manufacturing a buoy, characterized in that it has an upper concave portion (80b) that is incorporated into the under-convex portion (70b). The method of claim 9,
The upper mold 80 is a mold for manufacturing a buoy, characterized in that it comprises a pair of upper rope grooves (80a) opposed to each of the pair of under rope grooves (70a).

Images