KR102392219B1 - Buoy and its manufacturing method - Google Patents

Abstract

The present invention relates to a buoy and a manufacturing method thereof. The buoy manufacturing method includes a mold processing step, a check valve unit forming step, a mold setting step, a check valve unit position fixing step, a material supply step, a molding step, a blower forming step, a processing step, a first supply step, a second supply step, and a blower nozzle advancing hole forming step. The present invention improves durability.

Description

Buoy and its manufacturing method

The present invention relates to a buoy and a method for manufacturing the same, and more particularly, to a buoy used by floating in water when guiding a ship's route or setting up a cage farm and when constructing a late night restaurant for cultivating fish and shellfish, and a method for manufacturing the same will be.

In general, a buoy (浮具) is a floating body (浮体) floating on the water surface, also called a buoy, a buoy (浮標), or a buoyancy body.

Such buoys are used at the position to indicate the route to help the safe navigation of the ship or to warn the existence of dangerous objects in navigation, such as reefs and sunken ships, as well as fishing gear or anchors of objects in the water. It is also used to indicate the location, and it is used to install and fix nets in a farm for cultivating fish, shellfish and seaweed within a certain range.

These buoys have buoyancy so that they can float on the water, and are fixed to the bottom of the sea floor or a heavy object whose position can be fixed by means of a chain, rope, or foot pedal that can be attached to the buoy.

Until now, buoys composed only of Styrofoam, which have excellent buoyancy and low price, have been mainly used. However, buoys composed only of Styrofoam have low durability and are easily ruptured even by small impacts, resulting in extremely short lifespan and damage to Styrofoam buoys. As a result, particles falling from the buoy not only severely pollute the ocean, but also adhere to the aquaculture, so washing may be added in the process of collecting the aquaculture, and there was a problem that the commerciality was lowered accordingly.

In order to solve this problem, recently, buoys made of synthetic resin material have been widely distributed. However, buoys made of synthetic resin material can be molded in various shapes and have superior durability compared to styrofoam buoys, which has the advantage of a long lifespan. , the combined production cost is high, so the price is high and the overall weight is heavy. In particular, when the plastic buoy becomes hard at low temperatures in winter, it is easily broken even by a small impact and cannot function as a buoy. By maintaining the buoyancy, there were often cases where water was introduced into the interior during use and the buoyancy function was lost.

To improve the disadvantages of the Styrofoam buoys or plastic buoys, a waterproof sheet attached to the outer surface of the upper and lower body after sealing the cylindrical cap with an open lower part to the lower body by heat sealing and then facing the upper body. In some cases, watertight bulkheads are formed by injecting urethane resin into the space formed by This can affect the breakage of the float, and furthermore, as it is formed by attaching a waterproof sheet to the side, the possibility that the float will be damaged by waves or external impact is high. Urethane can also be damaged, which in turn can lead to damage to the entire buoyancy.

This has been developed, and recently, blower molding made of high-density polyethylene (HDPE) has been developed.

Accordingly, the Korean patent literature developed so far is as follows.

Japanese Laid-Open Patent Application Laid-Open No. 2001-095424 (April 10, 2001) provides a buoyancy control float having a structure with increased strength of the float body, preventing water intrusion due to wave shaking, obtaining stability of buoyancy, and maintaining thermal insulation The purpose of this is to improve overall handling, such as improvement of overall operability, such as adjustment of buoyancy, etc., and a hollow hollow tube is erected almost in the center of the float body of a cylindrical hollow body inflated at both ends to transform the external force. As a float resistant structure, the intake valve supplies air and water to the float body from a plurality of communication holes in the valve with a fixed top port, and drains only to the outside of the float body to the water supply opening disposed opposite the valve. It is a buoyancy control float that opens and closes with suction pressure to control buoyancy to keep the internal pressure constant. , to prevent water intrusion due to wave shaking and to obtain stability of buoyancy, improve overall operability such as thermal insulation and adjust buoyancy, as well as prevent intrusion of immovable water by waves, The interaction of the receiving one-way valve has the effect of having a stable buoyancy with a stable constant pressure without lowering the internal pressure. Patent Application No. 10-2007-0074415 (July 25, 2007) relates to a float for air inlet and outlet type aquaculture and a manufacturing method thereof, and a soft float body having a valve fixing part having an insertion hole connected to the inside in the center formed on one side thereof, The valve is inserted into the insertion hole of the valve fixing part and is inserted into the valve fixing part to prevent the air from being discharged through the valve body and the valve core having a through hole through which air is introduced and discharged. and a protective cap fixed to block the through hole of the valve, wherein the valve has a locking protrusion formed on an outer circumferential surface of the valve body, a stepped portion is formed in the lower part of the insertion hole of the valve fixing part, and a threaded part is formed in the upper part, and the protective cap A threaded part is formed on the outer circumferential surface of the valve, and the locking jaw of the valve is fixed by being caught on the step of the valve fixing part, and the screw part of the protective cap is screwed to the screwed part of the valve fixing part. Patent Application No. Patent Application No. 10-2010-0013188 (2010.02.12.) relates to a buoy for air intake and withdrawal, and in detail, a buoy body having a valve fixing part having an insertion hole connected to the inside in the center is formed on one side of the buoy body and a buoy valve that is inserted into the valve fixing part to inject or discharge air, wherein the buoy valve has a cylindrical shape and is inserted into the insertion hole of the valve fixing part to be coupled chamber; a flexible housing having a closed cylindrical shape and being inserted into and coupled to the chamber and having a female screw portion formed therein; and a cap portion having a round shape and seated on the upper portion of the housing, a male screw portion formed on a lower outer circumferential surface of the cap portion to block the discharge of air through the housing and inserted into the housing to be fastened with the female screw portion; A screw formed in the lower part of the screw part and tapered toward the lower side and composed of a close contact part that is in close contact with the inner surface of the housing; is made including, the lower one side of the housing is opened when air is injected from the outside, and the air pressure inside the buoy body It is characterized in that a slit of an incised shape that can be closed is formed, and according to this, the structure is simple, so it is easy to manufacture, there is no minor breakdown, and air injection and exhaust are convenient, and air can be effectively blocked. Patent Application No. 10-2005-0032816 (April 15, 2005) is to provide a buoy for aquaculture that is easy to manufacture, has excellent durability, has excellent identification ability at night and at the same time can easily identify whose farm it is, A spherical ball-shaped endothelium is manufactured by the blower molding method, and the endothelium is molded into a predetermined mold to form a buoy in which the inner skin and outer skin are integrated to manufacture a buoy with excellent durability and neat appearance. After applying a luminescent paint to the surface of the inner skin, it is put in a predetermined mold and the outer skin is molded with a transparent resin to form a buoy in which the inner skin and outer skin are integrated. In this case, identification at night is very easy, As the inner skin is integrally molded with the inserted inner skin, there is no bonding area at all, so the durability of the buoy is very excellent. After printing or marking the owner's mark and the owner's name, etc. on the surface, the shell can be integrally molded, providing a buoy for aquaculture that can also identify the owner. Patent Application No. 10-2011-0010161 (2011.02.01) relates to an improved buoy used for aquaculture, with an extruder attached to 05 parts by weight of talc, 10 parts by weight of a colorant, and 15 parts by weight of a flame retardant based on 100 parts by weight of a thermoplastic resin. 12 parts by weight of the co-foaming agent composition composed by mixing 85% of HFC-134a and 15% of HCFC-142b was continuously introduced into the hopper, mixed uniformly, and then introduced into the molding machine chamber at 165° C. for 3 minutes An improved part for aquaculture, characterized by foam molding of a new improved part for aquaculture made of foamed plastic foam with a density of 35 to 45 kg/m3, a thermal conductivity of 29 to 40 mW/mK, and an average cell size of 110 to 200 μm under a pressure of 125 MPa It is a method of manufacturing the sphere. Patent Application No. 10-2016-0180879 (2016.12.28) discloses a hollow buoy for marine terminology such as aquaculture farm, fishing ground mark, and net mark, as well as a navigational aid for safe navigation of ships, and various lifesaving products for the safety of occupants. It relates to a method for manufacturing a hollow buoy, which is a tool for various marine activities requiring buoyancy and buffering properties of the material, comprising: forming a hollow liner assembly formed by assembling a hollow liner assembly having at least one hollow buoyancy space shielded from the outside process department; Insert injection molding in which the hollow liner assembly in which the hollow buoyancy space is formed is disposed in the molding space of an insert injection mold, and then the melt is injected and cooled into the molding space to form a hollow molded body formed by the hollow liner assembly The hollow molded body molded by the insert injection molding, comprising a process, forms a hollow structure by the inserted hollow liner assembly, and in the hollow liner assembly forming process, a plurality of centers are formed on the outer wall of the hollow liner assembly. Alignment pins are formed to protrude, and in the insert injection molding process, the center alignment pins protruding from the outer wall of the hollow liner assembly support the inner wall of the molding space of the insert injection mold apparatus, so that the hollow liner assembly is aligned in the center of the molding space. It is a method of manufacturing a hollow buoyant, characterized in that it is fixed. Patent Application No. 10-2017-0033555 (2017.03.17) discloses that the body of the fishing gear is made of ABS (Acrylonitrile-Butadiene-Styrene) resin material, but the upper body and the lower body are separated, and the lower body is vaporized at room temperature. Put a plastic bag in which the vaporizer is injected and heat-seal the upper and lower parts to seal the main body. As the vaporizes inside the sealed main body, the plastic bag expands and adheres to the inner surface of the main body, increasing the internal pressure inside the main body. By forming a hook part on the outer surface of the main body, a high internal pressure is formed inside the buoy for fishing gear, so the buoyancy is high, so the buoy for fishing gear does not go below the water surface even when the species is growing. Since it is supported by a constant pressure from the inside, even if it is swept away by waves or currents and goes down to the depths of the sea, it is not easily crushed or damaged or damaged by external forces such as water pressure. It is possible to reduce the weight, and the plastic bag reinforces the main body so that the internal pressure is maintained even if the main body is damaged or damaged. Patent Application No. 10-2018-0072191 (2018.06.22) It relates to a buoy in which a reinforcing means is provided inside and the external deformation is prevented by a linear member for fastening and binding. an upper body formed in a semi-cylindrical shape, inwardly drawn into both sides of an outer circumferential surface in the longitudinal direction, and extending in the circumferential direction, in which first linear member seating portions are respectively formed; The width becomes narrower toward the lower part, and the inside is formed in a hollow semi-cylindrical shape, the upper end is coupled to the upper body, the second linear member is drawn in on both sides of the outer peripheral surface corresponding to the first linear member seating part in the inward direction, respectively extending in the circumferential direction A lower body having a linear member seating portion formed thereon, wherein the upper body is formed to protrude from an inner circumferential surface corresponding to the first linear member seating portion to the retracted shape of the first linear member seating portion from the center side of the upper inner protrusion and an upper external reinforcing rib which is formed to protrude and extends in the circumferential direction to maintain an external shape against the pressing force of the linear member to be seated on the first linear member seating portion, and the lower body corresponds to the second linear member seating portion With respect to the pressing force of the linear member protruding from the center side of the lower inner protrusion formed to correspond to the retracted shape of the second linear member seating part on the inner circumferential surface and extending in the circumferential direction to be seated in the second linear member seating part The outer shape is maintained and both ends are provided with a lower outer reinforcing rib in contact with the upper outer reinforcing rib, and the upper body is formed protruding from an inner circumferential surface corresponding to the center side between the plurality of upper inner protruding portions, and a first auxiliary extending in the circumferential direction An external reinforcing rib, a plurality of second auxiliary external reinforcing ribs protruding from the inner circumferential surface of one side in the longitudinal direction, extending in the vertical direction, parallel to each other and spaced apart in the width direction, and protruding from the inner circumferential surface of the other side in the longitudinal direction, It extends in the vertical direction, is parallel to each other, is spaced apart in the width direction, and includes a plurality of third auxiliary external reinforcing ribs facing each of the plurality of second auxiliary external reinforcing ribs, wherein the lower body is a center between the plurality of lower inner protrusions A fourth auxiliary external reinforcing rib protruding from the inner circumferential surface corresponding to the side and extending in the circumferential direction so that both sides are in contact with the first auxiliary external reinforcing rib, and a fourth auxiliary external reinforcing rib protruding from the inner circumferential surface of one side in the longitudinal direction and extending in the vertical direction to each other A plurality of fifth auxiliary external reinforcing ribs which are spaced in parallel and spaced apart in the width direction and whose upper ends are in contact with the lower ends of the second auxiliary external reinforcing ribs, are formed to protrude from the inner circumferential surface of the other side in the longitudinal direction and extend in the vertical direction so as to be parallel to each other and wide spaced apart in the direction, and a plurality of the fifth auxiliary external reinforcing ribs and and a plurality of sixth auxiliary external reinforcing ribs, the upper end of which is in contact with the lower end of the third auxiliary external reinforcing rib, wherein the upper outer reinforcing rib is provided with respect to the pressing force of the linear member seated in the first linear member seating portion A plurality of upper constant deformation inducing grooves that are drawn upward in the vertical direction with respect to the lower end of the upper body at regular intervals so as to be deformed into a constant shape are provided, and the introduced width is narrower, and the lower external reinforcing rib is the second In order to be deformed into a constant shape with respect to the pressing force of the linear member seated in the linear member seating portion, the linear member is drawn downward in the vertical direction with respect to the upper end of the lower body at a position corresponding to the upper constant deformation inducing groove, and the retracted width is Buoy, characterized in that it is provided with a plurality of lower constant deformation inducing grooves that are narrowed. Utility Model Registration Application No. 20-2009-0016306 (2009.12.15) states that the buoyancy function of the buoy does not deteriorate even when used for a long time at sea level, there is no need to inject compressed air into the buoy, and the impact is also applied from the outside. It relates to an improved design of a buoy for fishing gear so that it can be used for a long time by making a buoy with excellent durability against pressure. It is formed to protrude, and a joint with outward flanges is formed on the outer periphery of both ends, a partition is formed inside the center, a body part with hooks on the outer periphery wall, and a body part with a hook formed on the outer periphery wall, and the peripheral wall thickness is 2-3 mm made of polyethylene. A radial reinforcement body is formed in the outer circumferential direction, and a cover body with an outward flange joint formed along the outer periphery of the open part is integrated so that the joint of the cover body is fused to the joint end of the body part to form a hollow part partitioned by a partition inside. It is a buoy for fishing gear that was formed.

The above-mentioned buoys up to now could not form a single body into a balloon shape, so the defect rate was high by dividing the halves and forming them and then joining them. Since the ring was hollow and not reinforced, it was easily damaged and could not be commercialized, and all the buoys had a lot of difficulty in removing them because fish and shellfish were attached to the bottom part that sank below the sea level during use.

The present invention has been provided to solve the problems so far as described above, so that it can be installed upside down so that the top and bottom are changed every time the buoy is installed again, so that the inhabited fish and shellfish die naturally, as well as by forming an expansion counteracting part. The purpose of this is to reinforce the check valve and the ring forming part, and to improve the durability by reinforcing the abrasion strength by molding it into a solid type filled with material inside the ring.

The present invention for solving the above problems is formed by forming a tube to have an air chamber inside, forming an air inlet in the upper center, and forming a buoy having a ring on the outside, when a pair is combined, it is molded inside A mold processing step of forming a yarn and processing the ring forming yarn to integrally form the ring; a check valve unit forming step of forming a spiral on the inner circumferential surface and forming a check valve unit having at least two fusion flanges formed on the outer periphery; a mold setting step of setting the mold with the molding chamber processed in the mold processing step on a blower molding machine; a check valve unit position fixing step of inserting the check valve unit molded in the check valve unit molding step into the blower nozzle for injecting air of the blower molding machine in which the mold is set in the mold setting step and fixing the position; In the state of fixing the position of the check valve unit to the blower nozzle in the fixing step of the check valve unit, the mold, which is the material for forming the float in the mold extrusion head, is extruded into a tube shape so that the blower nozzle is embedded, and the material flows down between a pair of molds supply step; A molding step of integrally molding a ring by molding a mold to a tubular mold that has flowed down between a pair of molds in the material supply step, sealing the lower end, and integrally forming a molding chamber in which a balloon-shaped buoy is molded; A blower molding step of blowing air into a mold whose lower end is sealed in the molding step and expanding it into a balloon-like mold, so that the mold expanded into a balloon shape is in close contact with the inner surface of the molding chamber of the temporary mold to form a buoy; taking out the buoy molded in the blower molding step from the mold of the blower molding machine; a processing step of processing the outer surface of the buoy taken out in the taking out step; a check valve completion step of assembling a check valve to the check valve unit of the bugu with the surface processed in the processing step to complete the check valve; The check valve completion step consists of an air injection step of injecting air into the buoy where the check valve is completed, wherein the material supply step supplies the extruded amount of the initial material to be at least 1.3 to 1.6 times the body molding amount. a first supply step; a secondary supply step of supplying a reference amount for molding the body; Finally, by continuously carrying out the third supply step of supplying at least 1.7 to 2 times the amount of body shaping, a plate-shaped concave expansion counter is formed on the upper side of the buoyancy, and a check valve for injecting air is formed in the center. Forming a solid ring with no internal space integrally from the outer end of the expansion counteracting part, and forming a circular blower nozzle exit hole in the center of the ring; The lower part of the buoy is formed in the shape of a shell head, so that the tongue-shaped expansion counteracting parts are formed to face each other and recessed, and a solid circular ring is integrally molded at the end where the expansion counter parts meet to form a buoy.

As described above, the buoy completed by the manufacturing method of the present invention forms rings at both upper and lower ends so that the upper and lower sides are turned upside down whenever the buoy is reinstalled, so that the inhabited fish and shellfish die naturally. Effect, the expansion-response part is formed to reinforce the check and ring formation part, and the durability is improved by forming a solid shape filled with material inside the ring to reinforce the abrasion strength, and a blower with a circular shape in the center of the upper ring It is a novel invention that overcomes the disadvantage of not being able to form a ring in the upper center due to the blower nozzle that is essential in blower molding by forming the nozzle exit hole.

1 is a process diagram illustrating the implementation steps of the present invention.
Figure 2 is a photograph illustrating the configuration of a mold for implementing the present invention.
Figure 3 is an enlarged photograph illustrating a ring molding part which is the main part of the present invention.
Figure 4 is an exemplary picture of the configuration of the check valve unit used to practice the present invention.
5 is a photograph illustrating a state in which the mold of the present invention is set in a blower molding machine.
Figure 6 is an exemplary view of the blow molding machine molding preparation completion step of the present invention.
7 is a photograph illustrating a state of supply of material of the present invention.
8 is an exemplary photograph of a state in which the mold of the present invention is molded.
Figure 9 is a perspective photograph of the buoyancy obtained by carrying out the present invention.
10 is a partial enlarged view of the upper portion of the present invention, the main part of the bugu.
11 is a partial enlarged photograph of the lower part of the bugu, which is the main part of the present invention.

An embodiment according to a method for manufacturing a buoy according to the present invention will be described step-by-step as follows.

mold processing step;

When the pair of molds 100 are combined, the molding chamber 101 is formed therein.

In the center of the upper center of the molding chamber 101, the expansion-responding part forming part 111 is formed to form the expansion-responding part 11 recessed in a dish shape to insert-molding the check valve unit 25.

The upper ring forming chamber 112 for forming the upper ring 12 so as to form the blower nozzle exit hole 13 at the center integrally from the outer end of the expansion-corresponding part forming part 111 is constituted.

On the lower side of the molding chamber 101, a curved shape like the head of a shell is configured, but the expansion-responding part molding part 116 is configured so that the tongue-shaped expansion-responding part 16 is depressed to face each other.

The lower ring forming chamber 117 is formed so that the lower ring 17 is integrally formed at the end where the expansion-response forming part 116 meets.

Cheg valve unit forming step;

The check valve unit 25 in which a spiral is formed on the inner circumferential surface and at least two or more fusion flanges 26 is formed on the outer periphery is formed.

At this time, the check valve unit 25 is prepared by molding with a separate mold.

mold setting step;

The mold 100 processed in the mold processing step is set in a blower molding machine 150 .

Check valve unit position fixing step;

The check valve molded in the check valve unit molding step in the blower nozzle 151 configured to inject air into the molding chamber 101 of the mold 100 set in the blower molding machine 150 in the mold setting step Insert the unit (25) to fix the position.

material supply stage;

In the state that the check valve unit 25 is fixed to the blower nozzle 151 in the step of fixing the position of the check valve unit, the mold 30, which is the material for forming the float 10 in the mold extrusion head 152, is formed into a tube shape. It flows down between the pair of molds 100 by extrusion to surround the blower nozzle 151 .

At this time, the primary supply step of supplying the initial extrusion supply amount of the mold 30 in which the material is melted is at least 1.3 to 1.6 times the molding amount of the body of the buoy 10, and the mold 30 for molding the body of the buoy 10. The secondary supply step of supplying the extrusion supply amount as a standard amount, and the third supply step of supplying the final extrusion supply amount of the mold 30 to be at least 1.7 to 2 times the molding amount of the body of the buoy 10 are successively performed. .

Here, carrying out the primary supply step of supplying the initial extrusion supply amount of the mold 30 in which the material is melted to be at least 1.3 to 1.6 times the molding amount of the body 10 of the buoy is a solid solid inside the lower ring 17 when molding The third supply step of supplying the extruded supply amount of the final mold 30 to be at least 1.7 to 2 times the molding amount of the body of the buoy 10 is performed in order to achieve a state in which the upper ring 12 is molded. This is so that a portion of the mold 30 flows down under its own weight and the upper ring 12 in a solid state filled with the inside is molded.

This is to counteract abrasion caused by friction with the rope during use by preventing the inside of the rings 12 and 17 from being hollow due to the air press-fitted to the inside due to the nature of the blower molding.

mixing step;

In the material supply step, the mold 100 molds the tubular mold 30 that has flowed down between the pair of molds 100 in a tubular shape to integrally mold the rings 12 and 17, and at the same time seal the lower end and form a balloon shape. At the same time as forming the molding chamber 101 in which the float 10 is molded, the check valve unit 25 is integrally insert-molded.

At this time, the check valve unit 25 is insert-molded in the center while constituting the dish-shaped expansion-response portion 11 that is recessed in the center of the upper side, and the blower nozzle is integrally formed from the outer end of the dish-type expansion-response portion 11 to the center. At the same time forming the upper ring 12 to form the exit hole 13, sealing the lower end of the mold 30, and at the same time forming the lower side of the buoyancy 10 in the shape of a shell head, a tongue-shaped expansion-response part ( 16) are formed to face each other and recessed, and the lower ring 17 is integrally formed at the end where the expansion-responding part 16 meets.

At this time, as the outer periphery of the check valve unit 25 meets the mold 30 , the fusion flange 26 is partially melted to be integrated with the float 10 , and the outer peripheral surface is fused to maintain airtightness.

Here, constituting the dish-shaped expansion-response part 11 that is recessed in the upper center is the deformation of the internal pressure corresponding to the internal pressure when the air is filled in the floating part 10, and the floating part 10 and the check valve unit 25 ) to prevent the fused part from opening or cracking and leaking air.

And the formation of the blower nozzle exit hole 13 in the ring 12 is an upper ring (12) for inverting the buoy to use it in order to naturally remove the seaweed that inhabits the part submerged in the sea level when the buoy 10 is used. ) in the blower nozzle 151, which is indispensable when forming the float 10, it is impossible to form the ring 12 in the center of the upper side of the float 10. (13) was solved by forming

The tongue-shaped expansion-responding part 16 on the lower side is formed to face each other and to be depressed, as well as corresponding to the internal pressure when filling the inside of the buoy 10 with air. It is a means for reinforcing the ring 17 is formed by integrally molding the ring (17).

Blower (Blower) forming step;

In the molding step, the mold 30 inflated into a balloon shape by blowing air into the mold 30, which is sealed at the lower end and has a balloon-like shape, is in close contact with the inner surface of the molding chamber 101 of the mold 100 to form the buoyant 10 ) is molded.

extraction step;

When the molding of the float 10 is completed in the blower molding step, the mold 100 is separated and the molded float 10 is taken out from the mold 100 of the blower molding machine 150 .

processing step;

A process is performed to remove the burring formed during molding on the outer surface of the buoyancy 10 taken out in the extraction step.

Check valve completion stage;

The check valve 20 is completed by assembling the check valve to the check valve unit 25 of the buoy 10 that has been machined on the surface in the processing step.

air injection step;

In the check valve completion step, the check valve 20 is completed by injecting air into the completed float 10 to complete the float.

By carrying out the above-described method for manufacturing the buoy, a concave expansion counter 11 is formed in the shape of a plate on the upper side of the buoy 10, and a check valve 20 for injecting air is formed in the center thereof, and the expansion counter part 11 is formed. (11) forming a solid ring (12) with no interior space integrally from the outer end of (11), and forming a circular blower nozzle entry hole (13) in the center of the ring (12);

The lower part of the buoyancy 10 is shaped like a shell head, so that the tongue-shaped expansion-responding parts 16 are formed to face each other and recessed, and a solid ring 17 is integrally formed at the end where the expansion-response parts 16 meet. Construct the molded buoyancy.

Unexplained reference numeral 21 is a check valve cap for protecting the check valve 20 .

10: Buogu 11,16: Expansion-response part 12,17: Ring
13: Blower nozzle advance
20: check valve 25: check valve unit 26: fusion flange
30: mold
100: mold 101: molding room
111,116: expansion-response forming part 112,117: ring forming chamber
150: blower molding machine 151: blower nozzle

Claims (3)

In forming a tube to have an air chamber inside to form an air inlet in the center of the upper side, and to form a buoy having a ring on the outside,
A mold processing step of forming the molding chamber 101 inside when the pair of molds 100 are combined, and processing the ring molding chambers 112 and 117 to integrally mold the rings 12 and 17;
A check valve unit forming step of forming a spiral on the inner circumferential surface and forming the check valve unit 25 in which at least two fusion flanges 26 are formed on the outer periphery;
a mold setting step of setting the mold 100 in which the ring molding chamber 112, 117 is processed integrally with the molding chamber 101 in the mold processing step in a blower molding machine 150;
Insert the check valve unit 25 molded in the check valve unit molding step into the blower nozzle 151 for injecting air of the blower molding machine 150 set with the mold 100 in the mold setting step. a step of fixing the position of the check valve unit;
In the state that the check valve unit 25 is fixed to the blower nozzle 151 in the step of fixing the position of the check valve unit, the mold 30, which is the material for forming the float 10 in the mold extrusion head 152, is formed into a tube shape. A material supply step of extruding and flowing down between the pair of molds 100 so as to surround the blower nozzle 151;
The mold 100 molds the tubular mold 30 that has flowed down between the pair of molds 100 in the material supply step to integrally mold the rings 12 and 17, and seal the lower end, and a balloon-shaped buoyant ( 10) a molding step of forming a molding chamber 101 to be molded;
In the molding step, the mold 30 inflated into a balloon shape by blowing air into the mold 30, which is sealed at the lower end and has a balloon-like shape, is in close contact with the inner surface of the molding chamber 101 of the mold 100 to form the buoyant 10 ) forming a blower (Blower) forming step;
taking out the float 10 molded in the blower molding step from the mold 100 of the blower molding machine 150;
a processing step of processing the outer surface of the buoyancy 10 taken out in the taking out step;
a check valve completion step of completing the check valve 20 by assembling the check valve to the check valve unit 25 of the buoy 10, the surface of which has been machined in the processing step;
A method for manufacturing a buoy, characterized in that in the step of completing the check valve, an air injection step of injecting air into the buoy 10 in which the check valve 20 is completed is performed. The method of claim 1,
The mold processing step consists of a pair of molds 100 and forms a molding chamber 101 inside when combined, and insert molding the check valve unit 25 in the upper center of the molding chamber 101, The expansion-responding part forming part 111 is configured to form the recessed dish-shaped expansion-corresponding part 11, and the blower nozzle exit hole 13 is integrally formed at the center from the outer end of the expansion-responding part molding part 111. The upper ring forming chamber 112 for forming the ring 12 is formed, and the lower side has a curved shape like a shell head, so that the tongue-shaped expansion corresponding portion 16 is depressed to face each other and the expansion corresponding portion forming portion 116 ), and configuring the lower ring forming chamber 117 to integrally form the lower ring 17 at the end where the expansion-responding portion forming unit 116 meets;
The material supply step includes a primary supply step of supplying an initial extrusion supply amount of the mold 30 in which the material is melted to be at least 1.3 to 1.6 times the molding amount of the body of the buoy 10, and a mold for molding the body of the buoy 10. A secondary supply step of supplying the extrusion supply amount of (30) as a standard amount, and a tertiary supply step of supplying the final extrusion supply amount of the final mold 30 to be at least 1.7 to 2 times the body molding amount of the buoy 10. which is made to be carried out continuously;
In the molding step, the mold 100 molds the tubular mold 30 that has flowed down between the pair of molds 100 in the material supply step to form a dish-shaped expansion-response part 11 that is recessed in the center of the upper side. The check valve unit 25 is integrally insert-molded, and the solid upper ring 12 is integrally formed to form a circular blower nozzle entry hole 13 in the center from the outer end of the dish-shaped expansion counteracting part 11. It is molded, sealing the lower end and at the same time giving a shell head shape, so that the tongue-shaped expansion-responding parts 16 face each other and recessed, and at the end where the expansion-response parts 16 meet, a solid lower ring 17 ), a method for manufacturing a buoy, characterized in that it comprises the simultaneous molding of the integral. In a buoy in which an air inlet is formed in the center of the upper side by forming a tube to have an air chamber inside, and a ring is integrally formed on the outside,
On the upper side of the buoyancy 10, a concave expansion counter 11 is formed in a dish shape, and a check valve 20 for injecting air is formed in the center thereof, and integrally from the outer end of the expansion counter 11 to the inside. Forming a solid upper ring 12 with no space, and forming a circular blower nozzle entry hole 13 in the center of the upper ring 12;
The lower part of the buoy 10 is shaped like a shell head, so that the tongue-shaped expansion-responding parts 16 are depressed to face each other, and a solid circular lower ring 17 is formed at the end where the expansion-response parts 16 meet. ), characterized in that it is integrally molded.

Images