KR20230040548A - Coated steel, molding device, and manufacturing method of the same - Google Patents

Abstract

The present invention relates to a coating steel and a manufacturing method thereof. More specifically, the coating steel is supplied not to generate rust in water by being coated with EVA and coated with synthetic resin again during a process of shot blasting, water cleaning, heating, and supplying a C-shaped steel after a metal plate is supplied and molded as the C-shaped steel. The coating steel is protected by being connected to a cap on the upper side and the lower side of a hole molded at fixed intervals in case of necessity. Therefore, the coating steel can be used in the water for a long time. The C-shaped steel comprises: a bending unit (102) formed on the lower side; and a boring hole (101) formed at the fixed intervals on the upper side. An outer circumference EVA coating unit (115) and an inner circumference EVA coating unit (116) are coated with an EVA resin as the C-shaped steel (100) is supplied. The synthetic resin is supplied to the outer circumference EVA coating unit (115) and the inner circumference EVA coating unit (116), and an outer circumference coating unit (110) and an inner circumference coating unit (111) are coated. A cap member (120) connects an upper cap (130) and a lower cap (140) by supplying the upper cap (130) on the upper side of the boring hole (101) and supplying the lower cap (140) on the lower side of the boring hole (101).

Description

Coated steel, molding device, and manufacturing method of the same}

The present invention relates to a coated section steel and a molding device and a method for manufacturing the same, and more particularly, after supplying a metal plate and forming it into a C-section steel, in the process of shot blasting, cleaning with water, heating, and supplying, EVA is coated, and synthetic resin is coated again. It is supplied so that rust does not occur in water, and if necessary, caps are combined on the upper and lower sides of the molded holes at regular intervals to protect them, so that they can be used for a long time in water. It relates to a molding device and a manufacturing method thereof.

In general, round or square steel pipes or C-beams are used for agricultural and livestock facilities such as greenhouses, ginseng supports, or barn frames, including frame structures such as handrails and fences, structures installed in water, berthing facilities, and various floating objects. Widely used, these steel pipes or C-beams are used by painting, galvanizing, or coating synthetic resin components on the surface of the pipe or section steel in order to improve corrosion resistance and durability.

However, in the case of simply painting the surface of the steel pipe or section steel, the paint is easily peeled off from the surface of the pipe or section steel within a certain period of time after the installation of the facility, causing corrosion of the steel pipe pipe or section steel pipe. Due to difficulties in installation due to heavy loads, cost burden, and generation of environmental pollutants, it was difficult to apply galvanized products to agricultural, fisheries, and livestock facilities.

From the above point of view, a product coated with a synthetic resin component on the surface of a steel pipe pipe or section steel is more advantageous in terms of application, and such a resin-coated steel pipe pipe or section steel is, as described in US Patent Publication No. 4182782, a high frequency induction After heating the steel pipe pipe to a predetermined temperature by heating, the steel pipe pipe or section steel is passed through an extrusion coating machine in which resin pellets (resin powder) or molten resin are injected at high pressure to coat the surface of the steel pipe pipe or the resin coating layer. It is usually made in this way.

However, even if the resin coating layer is coated on the surface of the steel pipe or section steel, due to the significant difference in physical properties between the steel pipe or section steel and the resin coating layer, for example, the difference in thermal expansion and contraction coefficient, When a certain period of time has elapsed due to various external environmental factors including temperature changes, the resin coating layer is peeled off from the surface of the steel pipe or section steel, causing corrosion of the steel pipe pipe.

In order to supplement the above problems, an adhesive is applied to the surface of the steel pipe or section steel to improve the adhesive strength of the resin coating layer, but despite the application of this adhesive, bending or bending of the steel pipe pipe or section steel Problems such as wrinkles in the resin coating layer or peeling of the resin coating layer occurred during work, and the application of adhesive alone has greatly improved the tensile strength, yield point, and elastic restoring force, including corrosion resistance and durability of the resin-coated steel pipe pipe or section steel. There was a difficult problem.

In particular, agricultural and livestock facilities such as vinyl houses, ginseng support poles, or barn frames have structures that are very vulnerable to typhoons or heavy snowfall, so damage or collapse of agricultural and livestock facilities due to typhoons or heavy snowfall every year causes enormous economic losses. Despite this, it was not possible to provide a lightweight, inexpensive, and eco-friendly, high-functional resin-coated steel pipe or section steel that could replace the existing galvanized pipe for small agricultural and livestock producers.

In addition, when it is supplied into water and used for various purposes, more various problems occur, and resin is not coated in holes at regular intervals installed to tie strings or ropes, etc., so corrosion occurs from this part. there was

[Document 1] Patent Registration No. 0775311 (registered on November 2, 2007) [Document 2] Patent Registration No. 2233684 (registered on March 24, 2021) [Document 3] Patent Registration No. 2299249 (2021. 09. 01. Registration) [Document 4] Patent Registration No. 1601231 (2016. 03. 02. Registration)

Therefore, it was devised to solve these conventional drawbacks, and the problem of the present invention is to be mainly supplied in water to prevent corrosion by coating EVA and coating synthetic resin after shot blasting, water cleaning and heating, so that it can be used for a long time without corrosion. It aims to enable

Another object of the present invention is to fasten a cap to a hole for tying a string or rope so that it can be used for a long time without a part exposed to direct contact with water.

The present invention consists of a C-beam with a bent portion formed on the lower side and drilling holes formed at regular intervals on the upper side;

Including supplying C-shaped steel and coating EVA resin on the outer diameter EVA coating part and the inner diameter EVA coating part,

Including coating the outer diameter coating part and the inner diameter coating part by supplying a synthetic resin to the outer diameter EVA coating part and the inner diameter EVA coating part,

It is characterized in that it consists of a cap member for coupling the upper cap and the lower cap by supplying an upper cap from the upper side of the perforation hole and supplying a lower cap from the lower side of the perforation hole.

The present invention includes a steel sheet extruding step having a predetermined thickness using a metal material;

A C-shaped steel forming step of forming a C-shaped steel having a bent portion on both sides of the lower side of the steel sheet formed through the steel sheet extruding step and having perforated holes formed in a "⊂⊃" shape at regular intervals on the upper side;

A shot blasting step of supplying the C-beam to a shot blasting device to clean it cleanly by removing foreign substances and rust on the inner and outer surfaces by shot blasting;

A water cleaning step of supplying the shot blasted C-beam to a water cleaning device, spraying water on the inner and outer surfaces to remove foreign substances, and supplying compressed air to remove water buried on the outside;

A heating step of supplying the water-cleaned C-beam to a heating device and heating it to 350 to 400 ° C;

An EVA coating step of supplying the heated C-beam to an EVA extruder, extruding the EVA resin, and coating the inner and outer surfaces of the C-beam with an outer diameter EVA coating and an inner diameter EVA coating part;

The C-shaped steel coated with EVA resin on the inner and outer surfaces is supplied to the synthetic resin extruder, and the extruded synthetic resin is supplied to the outer diameter EVA coating of the C-shaped steel and the inner and outer surfaces of the inner diameter EVA coating part 116 to coat the outer diameter coating part and the inner diameter coating part. Synthetic resin coating step (S70);

A cooling step in which the C-shaped steel coated with EVA resin and synthetic resin is supplied to a cooling device and cooled by water cooling in the process of moving;

A pulling step in which the cooled C-beam is produced at a constant speed in each front process in the front pulling device;

A cutting step of cutting and supplying a cutting blade to a required length in a cutting device in the process of producing the C-beam;

A protective cap supplying step of supplying the upper and lower caps made of cap members from the upper and lower sides of the drilled hole to combine the cut C-beams to match each other;

Discharge step consisting of a discharge device that is cut or supplied with a C-shaped steel coupled with a cap member and discharged in a desired direction; It is characterized by consisting of.

In the present invention, steel plates are supplied to form C-beams by processing, and after shot blasting, water cleaning, and heating to prevent corrosion by supplying steel plates, coating EVA and synthetic resin to prevent corrosion, so that rigidity can be maintained and used for a long time without corrosion. It is to provide an effect that allows.

The present invention is to provide an effect that can be used for a long time because there is no part exposed to water by fastening the cap at the upper and lower sides of the hole for tying the string or rope.

1 is a plan view of an installation state showing a preferred embodiment of the present invention
2 is a front view showing the installation state of the present invention
Figure 3 is a front view showing the pulling and discharging state of the present invention
Figure 4 is a perspective view of the C-beam of the present invention
5 is a cross-sectional view of the C-beam of the present invention
Figure 6 is a side cross-sectional view of the C-beam of the present invention
Figure 7 is a perspective view of the coating and cap coupling state for the C-beam of the present invention
Figure 8 is a cross-sectional view of the coating and cap coupling state for the C-beam of the present invention
Figure 9 is a side cross-sectional view of the coating and cap coupling state for the C-beam of the present invention
10 is a perspective view of the coating and cap separation state for the C-beam of the present invention
11 is a cross-sectional view of the coating and cap separation state for the C-beam of the present invention
12 is a block diagram showing the most preferred embodiment of the present invention.

The above objects, other objects, features and advantages of the present invention will be easily understood through the following preferred embodiments in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided so that the disclosed content will be thorough and complete and the spirit of the present invention will be sufficiently conveyed to those skilled in the art.

In this specification, when an element is referred to as being on another element, it means that it may be directly formed on the other element or a third element may be interposed therebetween. Also, in the drawings, the thickness of components is exaggerated for effective description of technical content.

Embodiments described in this specification will be described with reference to cross-sectional views and/or plan views, which are ideal exemplary views of the present invention. In the drawings, the thicknesses of films and regions are exaggerated for effective explanation of technical content. Accordingly, the shape of the illustrative drawings may be modified due to manufacturing techniques and/or tolerances. Therefore, embodiments of the present invention are not limited to the specific shape shown, but also include changes in the shape generated according to the manufacturing process. For example, a region shown at right angles may be rounded or have a predetermined curvature. Accordingly, the regions illustrated in the drawings have attributes, and the shapes of the regions illustrated in the drawings are intended to illustrate a specific shape of a region of a device and are not intended to limit the scope of the invention. Although terms such as first and second are used to describe various elements in various embodiments of the present specification, these elements should not be limited by these terms. These terms are only used to distinguish one component from another. Embodiments described and illustrated herein also include complementary embodiments thereof.

Terminology used herein is for describing the embodiments and is not intended to limit the present invention. In this specification, singular forms also include plural forms unless specifically stated otherwise in a phrase. The terms 'comprises' and/or 'comprising' used in the specification do not exclude the presence or addition of one or more other elements.

In describing the specific embodiments below, several specific contents are prepared to more specifically describe the invention and aid understanding. However, readers who have knowledge in this field to the extent that they can understand the present invention can recognize that it can be used without these various specific details. In some cases, it is mentioned in advance that parts that are commonly known in describing the invention and are not greatly related to the invention are not described in order to prevent confusion for no particular reason in explaining the present invention.

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

1 is a plan view showing an installation state of a preferred embodiment of the present invention, Figure 2 is a front view showing the installation state of the present invention, Figure 3 shows a front view showing the pulling and discharge state of the present invention.

By supplying a plate of metal material, forming and supplying a C-beam 100 in which a bent portion 102 is formed on the lower side by a pipe making operation and "⊂⊃"-shaped perforation holes 101 are formed on the upper side at regular intervals.

To supply the C-shaped steel 100 and to remove corrosion or foreign substances formed on the outer diameter, shot blasting is performed in the shot blasting device 10.

The outer short part having the outer surface spraying part at the end for shot blasting the outer surface of the C-beam 100 and the inner short part having the inner surface spraying part at the end for shot blasting the inner surface are moved in the longitudinal direction of the C-beam 100 by the moving unit. Upon entry, internal and external shot blasting is performed by spraying shot balls on the inner and outer surfaces of the C-beam 100.

After shot blasting is performed on the inner and outer surfaces of the C-shaped steel 100, it is passed through a water cleaning device 20 for cleaning by spraying water on the inner and outer surfaces at a predetermined pressure during the moving process.

The C-beam 100 after the water cleaning is passed through the heating device 30 to be heated to a temperature of 350 to 400 ° C.

When the C-shaped steel 100 is heated, this is to prevent gaps from occurring due to the coating of the EVA resin supplied from the EVA extruder 40, and when heated below 350 ° C, the EVA resin is not coated and is easily separated. , When heated to 400 ℃ or more, the disadvantage that the EVA resin can flow down without being coated occurs, so the preferred heating temperature is to be 370 ℃.

The C-beam 100 heated as above is allowed to pass through the nozzle of the EVA extruder 40, and in the EVA extruder 40, ethylene vinyl acetate (hereinafter referred to as “EVA”) resin as the main component It includes extruding EVA containing fine particles and coating the outer diameter EVA coating part 115 on the entire outer diameter surface of the C-shaped steel 100 and the inner diameter EVA coating part 116 on the entire inner diameter surface.

The EVA resin is ethylene vinyl acetate, and its physical properties are determined by the degree of polymerization and the content of vinyl acetate. As the molecular weight increases, toughness, plasticity, stress cracking resistance, and impact resistance improve, but moldability and surface gloss decrease. On the other hand, when the content of vinyl acetate is increased, compatibility with polymers or plasticizers having different density, rubber elasticity, and flexibility is improved, and the softening temperature is lowered.

The fine particles containing the ethylene vinyl acetate resin as a main component of the present invention may exist in a state in which they are fused to each other.

In the EVA coating process of the present invention, a part of the fine particles may be fused by including a sintering step. More specifically, it may exist in the form of fine particles or one or more plural fine particles may exist in a state in which they are fused to each other, , fine particles and a form in which the fine particles are fused to each other may exist in a mixture.

Since the particulate containing the EVA resin as a main component is included, a crosslinking agent, a crosslinking aid, a sunscreen, and the like may be further included in the EVA resin. By adding additives to the EVA resin, it is possible to minimize the discoloration of EVA, and the deformation caused by ultraviolet rays and modularization.

The additive includes a crosslinking agent or a sunscreen, but other various additives may be further included if necessary. Specifically, examples of the additive include a silane coupling agent, a lubricant, an antioxidant, a flame retardant, and an anti-discoloration agent.

In the EVA extruder 40, the EVA resin passes through the synthetic resin extruder 50 in a state where the C-beam 100 is coated with the outer diameter EVA coating part 115 and the inner diameter EVA coating part 116, so that the outer diameter EVA coating part (115) and the outer diameter of the inner diameter EVA coating part 116 are coated with the outer diameter coating part 110 and the inner diameter coating part 111 to a predetermined thickness and then supplied.

The C-beam 100 passing through the synthetic resin extruder 50 passes through the cooling device 60 so that the coated state is cooled, and a roller is installed in front of the cooling device 60 to be guided, or a pulling device ( 70), it is pulled to be produced while maintaining a predetermined speed.

The C-beam 100 produced through the dipping device 70 is cut to a certain length and supplied through the cutting blade 81 of the cutting device 80, and supplied to the discharging device 90 to be discharged in a desired direction. is to make it possible

After passing through the cutting device 80 or supplied to the discharging device 90 or passing through the discharging device 90, the upper cap 130 is supplied from the upper side of the drilling hole 101, and the lower cap is supplied from the lower side. 140 is supplied to perform a finishing operation to prevent the exposure of the perforation hole 101 through the cap member 120 to which the upper and lower caps 130 and 140 are coupled in a female and male form.

It is preferable that the upper and lower caps 130 and 140 are injection molded from a synthetic resin material, supplied from the upper and lower sides of the perforated hole 101, and installed so as to be independently coupled.

Figure 4 is a perspective view of the C-beam of the present invention, Figure 5 is a cross-sectional view of the C-beam of the present invention, Figure 6 shows a side cross-sectional view of the C-beam of the present invention.

The C-beam 100 is supplied with a steel plate to be reinforced through the bent portion 102 by the pipe manufacturing process, and drilled holes 101 are formed at regular intervals on the upper side to provide various structures or buoyancy by tying strings or ropes. It is provided as a space in which it can be installed.

Figure 7 is a perspective view of the coating and cap coupling state for the C-beam of the present invention, Figure 8 is a cross-sectional view of the coating and cap coupling state for the C-beam of the present invention, Figure 9 is the coating and cap coupling state for the C-beam of the present invention Side cross-sectional view, Figure 10 is a perspective view of the coating and cap separation state for the C-beam of the present invention, Figure 11 shows a cross-sectional view of the coating and cap separation state for the C-beam of the present invention.

In the process of supplying the C-beam 100 after being formed, the outer diameter EVA coating part 115 and the inner diameter EVA coating part 116 are coated, and the outer diameter EVA coating part 115 and the inner diameter EVA coating part 116 are coated. To the outside, the synthetic resin is coated (covered) with the outer coating portion 110 and the inner coating portion 111.

Since the C-shaped steel 100 is easily corroded when the drilled hole 101 is not properly coated and used in water, the cap member 120 is coupled and installed to prevent the drilled hole 101 from being exposed to water. will be.

The upper and lower caps 130 and 140 coupled to the perforation hole 101 protrude regularly along the outer diameter of the perforation hole 101 so that the upper and lower wings 131 and 141 protrude, After the upper and lower holes 132 and 142 are formed inside the upper and lower wings 131 and 141, long protruding upper and lower projections 133 and 143 are formed to form a female and a male shape.

Among the upper and lower protrusions 133 and 143, an upper coupling groove 135 and an upper coupling protrusion 134 are formed in a concavo-convex shape on the outer diameter of the upper protrusion 133, and the lower coupling groove 135 and the upper coupling protrusion 134 are formed on the inner diameter of the lower protrusion 143. The groove 144 and the lower coupling protrusion 145 are formed, respectively, so that the upper coupling groove 135 and the lower coupling protrusion 145 are coupled, and the upper coupling protrusion 134 and the lower coupling groove 144 each have a concave-convex shape. It is combined to prevent corrosion by protecting water from permeating into the perforated hole 101.

The present invention having such a configuration will be described in more detail through the block diagram of FIG. 12 .

It is to perform the steel plate extrusion step (S10) having a predetermined thickness using a metal material.

The steel plate formed through the steel plate extrusion step (S10) has a bent portion 102 on both sides of the lower side through a conventionally installed pipe manufacturing device, and a perforated hole 101 formed in a "⊂⊃" shape at regular intervals on the upper side. ) To perform the C-beam forming step (S20) of forming the C-beam 100 having.

The C-beam 100 can provide various shapes such as a rectangular steel pipe or a circular pipe.

The shot blasting step (S30) of supplying the C-beam 100 to the shot blasting device 10 to remove foreign substances and rust on the inner and outer surfaces by shot blasting to clean them cleanly is performed.

The shot blasted C-beam 100 is supplied to the water cleaning device 20, water is sprayed on the inner and outer surfaces to remove foreign substances, and if necessary, compressed air is supplied to remove the water on the outside (S40 ) is to be performed.

It is to perform a heating step (S50) of supplying the water-cleaned C-beam 100 to the heating device 30 and heating it to 350 to 400 ° C.

The C-beam 100 heated through the heating temperature is to improve the adhesion of EVA resin and synthetic resin coated (covered) on the inner and outer surfaces.

EVA coating step of supplying the heated C-beam 100 to the EVA extruder 40 and extruding the EVA resin to coat the inner and outer surfaces of the C-beam 100 with the outer diameter EVA coating 115 and the inner diameter EVA coating part 116 (S60) is performed.

The C-shaped steel 100 coated with EVA resin on the inner and outer surfaces is supplied to the synthetic resin extruder 50, and the extruded synthetic resin is the outer diameter EVA coating 115 and the inner diameter EVA coating part 116 inner and outer surfaces of the C-shaped steel 100 It is supplied to perform a synthetic resin coating step (S70) of coating with the outer diameter coating part 110 and the inner diameter coating part 111.

The synthetic resin is capable of coating various materials such as polyethylene (PE, HDPE, LDPE) and polypropylene (PP), and includes synthetic resins irradiated and crosslinked as necessary.

Irradiated and crosslinked synthetic resins are supplied to an irradiation crosslinking device and passed through a silane method in which trismethoxy vinyl silane is used, an irradiation crosslinking method in which irradiation energy is applied using electron beams or UV rays to cause crosslinking, and an organic peroxide agent. Irradiation crosslinking is performed using any one of chemical crosslinking methods in which crosslinking is performed by radicals formed by additives or crosslinking agents such as the like.

The irradiated, crosslinked synthetic resin is resistant to sunlight and has improved hardness, so that it is not easily corroded when exposed to the outside and can be used for a long time.

The C-beam 100 coated with EVA resin and synthetic resin is supplied to the cooling device 60 to perform a cooling step (S80) in which it is cooled in a water-cooled manner while moving.

The cooled C-beam 100 is to perform a pulling step (S90) to produce each front process at a constant speed in the front pulling device 70.

In the process of producing the C-beam 100, a cutting step (S100) of cutting and supplying the cutting blade 81 to a required length in the cutting device 80 is performed.

The cut C-beam 100 is a protective cap supplying step of supplying the upper cap 130 and the lower cap 140 made of the cap member 120 from the upper and lower sides of the drilled hole 101 to match each other (S105) is to perform

The cap member 120 composed of the upper and lower caps 130 and 140 is coupled so that the perforation hole 101 is not exposed to water, and is fixed by tying a string or rope through the upper and lower holes 132 and 142 It is to be used as a space that can be used.

Upper and lower caps 130 and 140 where the cap member 120 is coupled to the perforation hole 101 protrude uniformly along the outer diameter of the perforation hole 101 to be protected. Upper and lower wings 131 and 141 ) protrudes, and after the upper and lower holes 132 and 142 are formed inside the upper and lower wings 131 and 141, long protruding upper and lower projections 133 and 143 are formed to form female and male shapes. is to combine to become

Among the upper and lower protrusions 133 and 143, an upper coupling groove 135 and an upper coupling protrusion 134 are formed in a concavo-convex shape on the outer diameter of the upper protrusion 133, and the lower coupling groove 135 and the upper coupling protrusion 134 are formed on the inner diameter of the lower protrusion 143. The groove 144 and the lower coupling protrusion 145 are formed, respectively, so that the upper coupling groove 135 and the lower coupling protrusion 145 are coupled, and the upper coupling protrusion 134 and the lower coupling groove 144 each have a concave-convex shape. It will be combined as much as possible.

The discharging step (S110) consisting of the discharging device 90 for receiving the cut or C-shaped steel 100 coupled with the cap member 120 and discharging it in a desired direction is performed.

In the present invention, since the perforated hole can be exposed to water after supplying the shaped steel, coating the EVA, and coating the synthetic resin, the upper and lower caps made of cap members are combined in a concavo-convex shape so that water does not permeate, preventing corrosion in water for a long time. It is to provide a very useful invention that can be used in a solid state.

10: shot blasting device 20: water cleaning device
30: heating device 40: EVA extruder
50: synthetic resin extruder 60: cooling device
70: pulling device 80: cutting device
90: discharge device 100: C-beam
101: drilling hole 102: bent portion
110: outer diameter coating part 111: inner diameter coating part
115: outer diameter EVA coating part 116: inner diameter EVA coating part
120: cap member 130: upper cap
131: upper wing 132: upper hole
133: upper projection 134: upper coupling projection
135: upper coupling groove 140: lower cap
141: lower wing 142: lower hole
143: lower projection 144: lower coupling groove
145: lower coupling protrusion

Claims (7)

It is made of C-beam with a bent portion 102 formed on the lower side and perforated holes 101 formed at regular intervals on the upper side;
Including supplying the C-beam 100 and coating the EVA resin on the outer diameter EVA coating part 115 and the inner diameter EVA coating part 116,
Including coating the outer diameter coating part 110 and the inner diameter coating part 11 by supplying a synthetic resin to the outer diameter EVA coating part 115 and the inner diameter EVA coating part 116,
A cap member ( 120) coated steel, characterized in that consisting of.
According to claim 1,
The C-shaped steel 100 is supplied after shot blasting, water cleaning and heating, and coated with EVA resin on the outer diameter EVA coating part 115 and the inner diameter EVA coating part 116.
According to claim 1,
The cap member 120 has an upper hole 132 formed inside an upper wing 131 surrounding the perforation hole 101 from the upper side, and an upper protrusion 133 formed below the upper hole 132, an upper cap 130 having an upper coupling groove 135 and an upper coupling protrusion 134 formed on an outer diameter thereof;
A lower hole 142 is formed inside the lower wing 141 surrounding the perforation hole 101 from the lower side, and a lower protrusion 143 is formed on the upper side of the lower hole 142 to form a lower coupling groove on the inner diameter ( 144) and the lower cap 140 in which the lower coupling protrusion 145 is formed, and the upper and lower caps 130 and 140 are coupled to each other.
A shot blasting device 10 for supplying C-beam 100 to remove foreign substances and rust from the inner and outer surfaces;
After the shot blasting of the C-shaped steel 100 is performed, a water cleaning device 20 for cleaning by spraying water on the inner and outer surfaces at a predetermined pressure in the process of moving;
A heating device 30 for heating the C-beam 100 after water cleaning to a temperature of 350 to 400 ° C;
An EVA extruder (40) that extrudes EVA resin on the heated C-beam 100 and coats the outer diameter EVA coating part 115 on the entire outer surface of the C-section steel 100 and the inner diameter EVA coating part 116 on the entire inner surface of the C-section steel 100. );
A synthetic resin extruder ( 50);
A cooling device 60 for cooling the C-beam 100 passing through the synthetic resin extruder 50;
In front of the cooling device 60, a pulling device 70 that pulls the C-beam 100 to be produced;
A cutting device 80 for cutting and supplying the C-beam 100 produced through the dipping device 70 to a certain length through a cutting blade 81;
Discharge device 90 for discharging the cut C-beam 100 in a desired direction; and
In the state supplied to the discharge device 90, the upper cap 130 is supplied from the upper side of the drilling hole 101, and the lower cap 140 is supplied from the lower side so that the upper and lower caps 130 and 140 are female and male. Coated shaped steel molding apparatus characterized in that the finish is to prevent the exposure of the drilling hole 101 through the cap member 120 coupled in the form.
Extruding a steel plate having a predetermined thickness using a metal material (S10);
The steel plate formed through the steel plate extrusion step (S10) has bent portions 102 on both sides of the lower side, and has a C-shaped steel 101 having perforations 101 formed in a "⊂⊃" shape at regular intervals on the upper side. ) C-beam forming step of forming (S20);
A shot blasting step (S30) of supplying the C-beam 100 to the shot blasting device 10 to clean it cleanly by removing foreign substances and rust on the inner and outer surfaces by shot blasting;
A water cleaning step (S40) of supplying the shot blasted C-beam 100 to the water cleaning device 20, spraying water on the inner and outer surfaces to remove foreign substances, and supplying compressed air to remove the water buried on the outside;
A heating step (S50) of supplying the water-cleaned C-beam 100 to the heating device 30 and heating it to 350 to 400 ° C;
EVA coating step of supplying the heated C-beam 100 to the EVA extruder 40 and extruding the EVA resin to coat the inner and outer surfaces of the C-beam 100 with the outer diameter EVA coating 115 and the inner diameter EVA coating part 116 (S60);
The C-shaped steel 100 coated with EVA resin on the inner and outer surfaces is supplied to the synthetic resin extruder 50, and the extruded synthetic resin is the outer diameter EVA coating 115 and the inner diameter EVA coating part 116 inner and outer surfaces of the C-shaped steel 100 A synthetic resin coating step (S70) of supplying to the outer diameter coating unit 110 and coating the inner diameter coating unit 111;
A cooling step (S80) in which the C-shaped steel 100 coated with EVA resin and synthetic resin is supplied to the cooling device 60 and cooled by water cooling in the process of moving;
The cooled C-beam 100 is a pulling step (S90) of producing each front process at a constant speed in the front pulling device 70;
A cutting step (S100) of cutting and supplying the cutting blade 81 to a required length in the cutting device 80 in the process of producing the C-beam 100;
Discharging step (S110) consisting of a discharging device 90 for receiving the cut C-beam 100 and discharging it in a desired direction; Method for producing a coated steel section, characterized in that consisting of.
According to claim 5,
The cut C-beam 100 is a protective cap supplying step of supplying the upper cap 130 and the lower cap 140 made of the cap member 120 from the upper and lower sides of the drilled hole 101 to match each other (S105) ; Method for producing a coated steel section, characterized in that for further performing.
According to claim 6,
In the protective cap supply step (S105), the upper and lower caps 130 and 140 where the cap member 120 is coupled to the perforation hole 101 are constantly protruded along the outer diameter of the perforation hole 101 to be protected. The upper and lower wings 131 and 141 protrude, and the upper and lower projections 133 and 143 protrude after the upper and lower holes 132 and 142 are formed inside the upper and lower wings 131 and 141. ) is formed to form a male and female form,
Among the upper and lower protrusions 133 and 143, an upper coupling groove 135 and an upper coupling protrusion 134 are formed in a concavo-convex shape on the outer diameter of the upper protrusion 133, and the lower coupling groove 135 and the upper coupling protrusion 134 are formed on the inner diameter of the lower protrusion 143. The groove 144 and the lower coupling protrusion 145 are formed, respectively, so that the upper coupling groove 135 and the lower coupling protrusion 145 are coupled, and the upper coupling protrusion 134 and the lower coupling groove 144 each have a concave-convex shape. Method for producing coated steel, characterized in that combined to be.

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