KR102205216B1 - Ceramic integrated abrasion resistant composite pipe and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a ceramic-integrated wear-resistant composite tube formed of ceramic to minimize damage caused by an object to be transported, and a method of manufacturing the same. The ceramic-integrated wear-resistant composite tube according to an embodiment of the present invention surrounds the outer surface of the ceramic core layer to prevent the ceramic core layer from being easily damaged, the ceramic core layer formed in the shape of an integrated tube by ceramic material, A resin reinforcing layer formed of synthetic resin, a bonding layer positioned between the ceramic core layer and the resin reinforcing layer to bond the resin reinforcing layer to the ceramic core layer, and UV blocking and flame retardancy to protect the resin reinforcing layer from fire and ultraviolet rays. It includes a UV-blocking flame retardant layer formed of a material having. Therefore, it is easy to manufacture and mass production is easy, and not only can be easily manufactured in various shapes, but also has an advantage of good workability and easy transport due to its light weight.

Description

Ceramic integrated abrasion resistant composite pipe and manufacturing method thereof

The present invention relates to a ceramic-integrated wear-resistant composite tube formed of ceramic to minimize damage caused by an object to be transported, and a method of manufacturing the same.

In general, the pipe is installed to transport the fluid, but it is also installed to transport the object to be transported such as coal or sand, if necessary.

For example, in the case of a thermal power plant, pipes are installed to transport the coal or sludge from the desulfurization process, and the hardness of coal and sludge is high and the temperature is high, so even if a metal pipe is installed, coal collides inside and wears the pipe. Occurs or there is a problem that the pipe is corroded by the chemical composition of the sludge.

In order to prevent this, many attempts have been made to fabricate pipes using ceramics with high wear resistance, but ceramics are easily deformed or cracked in the process of performing high-temperature heat treatment and drying due to their characteristics, so the Korean Utility Model Publication No. 20 As in No. 0404768 (announced on December 28, 2005) or Korean Patent Publication No. 10-1798927 (announced on November 17, 2017), a ceramic tile is attached to the inner surface of the exterior, or a ceramic unit tube with a short length is attached to the exterior. It was manufactured in the form of connecting and installing inside

However, in the conventional techniques described above, since the ceramic is manufactured in a divided form and arranged to be connected to each other, the object to be transported hits the connection part, causing abrasion at the connection part, as well as causing the object to be transferred to be caught in the connection part. A problem occurred.

In addition, since it is manufactured by connecting a divided pipe inside the exterior, and the exterior is formed of metal to protect the ceramic that is easily damaged by external impact, it is difficult to process in various forms, and manufacturing is not easy. There was a problem with high manufacturing cost.

The present invention has been conceived to solve the above problems, and the problem to be solved by the present invention is to minimize damage caused by the object to be transported by manufacturing a continuous tube so that the connection part is minimized using ceramic. It is an object of the present invention to provide a ceramic-integrated wear-resistant composite tube that can be easily manufactured not only in the shape of the tube, but also in the shape of fittings with ceramic, is easy to transport and install due to its light weight, and can significantly reduce manufacturing cost.

The ceramic-integrated wear-resistant composite tube according to an embodiment of the present invention for achieving the above object is a ceramic core layer formed into an integrated tube shape by a ceramic material, and the ceramic core layer is used to prevent the ceramic core layer from being easily damaged. A resin reinforcement layer surrounding the outer surface of the layer and formed of synthetic resin, a bonding layer that is positioned between the ceramic core layer and the resin reinforcement layer to bond the resin reinforcement layer to the ceramic core layer, and the resin reinforcement layer from fire and ultraviolet rays. It includes a UV-blocking flame-retardant layer formed of a material having UV-blocking and flame-retardant properties to protect.

The resin reinforcing layer may include fibers for enhancing hardness by impregnating the synthetic resin.

The synthetic resin may include a reinforcing additive mixed with the synthetic resin to reinforce the hardness of the resin reinforcing layer, and the reinforcing additive may include a shrinkage inhibitor that prevents shrinkage due to hardening of the synthetic resin.

The ceramic material may be a mixture including alumina powder and kaolin.

The ceramic core layer may be surface-treated in an uneven shape so as to improve the bonding property of the resin reinforcing layer by the bonding layer.

The ceramic core layer supports the inner periphery of the upper end of the ceramic core layer to prevent molding defects according to the difference in shrinkage between the upper and lower ends of the ceramic core layer when the ceramic material is naturally dried in a tube shape. It can be dried naturally while the over-contraction prevention member is seated.

The over-shrinkage prevention member may have a shape having an area that slides upward while being pressed as the upper end of the ceramic core layer is contracted and decreases from top to bottom to support the inner circumference of the ceramic core layer.

The over-contraction preventing member may include a friction reducing member disposed between the ceramic core layer and the over-contraction preventing member so as to slide upward while being pressed as the upper end of the ceramic core layer is contracted.

In the method of manufacturing a ceramic-integrated wear-resistant composite tube according to an embodiment of the present invention, forming a ceramic core layer by molding the ceramic material into a tube shape, forming a bonding layer on an outer surface of the ceramic core layer, the Forming a resin reinforcing layer on the outer surface of the bonding layer with the synthetic resin, and forming a UV-blocking flame retardant layer by applying a material having UV protection and flame retardancy to the outer surface of the resin reinforcing layer, wherein the ceramic core layer The forming may include naturally drying the ceramic core layer formed in the shape of the tube, heat-treating the ceramic core layer naturally dried in the natural drying step at a preset temperature, and the ceramic heat-treated in the heat treatment step. It may include the step of surface treatment to have an uneven surface on the outer surface of the core layer.

The step of naturally drying the ceramic core layer may include mounting an over-shrinkage preventing member supporting the inner periphery of the upper end of the ceramic core layer to prevent molding defects according to the difference in shrinkage rates between the upper and lower ends of the ceramic core layer. I can.

The over-shrinkage prevention member may have a shape having an area that slides upward while being pressed as the upper end of the ceramic core layer is contracted and decreases from top to bottom to support the inner circumference of the ceramic core layer.

The over-contraction preventing member may include a friction reducing member disposed between the ceramic core layer and the over-contraction preventing member so as to slide upward while being pressed as the upper end of the ceramic core layer is contracted.

The step of heat treatment may include performing a first heat treatment at a preset temperature, and after the step of performing the first heat treatment, performing a second heat treatment at a temperature higher than a preset temperature in the step of performing the first heat treatment.

The heat treatment may include installing a deformation preventing member that is sandwiched and supported at both ends of the ceramic core layer in order to prevent molding failure due to uneven shrinkage of the ceramic core layer when performing the heat treatment.

The forming of the resin reinforcing layer includes mixing a reinforcing additive with the synthetic resin, applying a synthetic resin mixed with the reinforcing additive to the bonding layer, attaching fibers to the synthetic resin applied to the bonding layer, and the It may include re-coating the synthetic resin so that the fibers are not visible from the outside and are covered.

According to the present invention, by forming the ceramic core layer in the shape of an integrated tube to minimize the occurrence of the joint portion, it is possible to improve abrasion resistance by minimizing the occurrence of jamming and abrasion of the conveyed object in the joint portion.

In addition, since the ceramic core layer is formed, tubes and fittings of various shapes can be easily manufactured, and mass production is easy.

In addition, by protecting the ceramic core layer by a resin reinforcing layer formed of synthetic resin, the weight is light, so it is easy to carry, and it is easy to construct, and it is possible to significantly reduce the manufacturing cost.

In addition, since a UV-blocking flame retardant layer is formed on the outer surface of the resin reinforcement layer, it is possible to extend the life by minimizing damage to the resin reinforcement layer from ultraviolet rays, as well as to minimize the damage caused by fire by having flame retardancy.

In addition, when the ceramic core layer is naturally dried, it is possible to minimize the occurrence of molding defects because the over-shrinkage prevention member is seated and formed, and the deformation by heat is minimized by installing a deformation prevention member during heat treatment. Can be minimized.

1 is a cross-sectional view showing a ceramic-integrated wear-resistant composite tube according to an embodiment of the present invention.
2 is a view showing various fabrication forms of a ceramic-integrated wear-resistant composite tube according to an embodiment of the present invention, where (a) is a shape of a straight tube, (b) is a shape of a curved tube (c) is a shape of a T-shaped tube. Show.
3 is a flowchart schematically illustrating a method of manufacturing a ceramic-integrated wear-resistant composite tube according to an embodiment of the present invention.
4 is a detailed flowchart illustrating a step of forming a ceramic core layer in a method of manufacturing a ceramic-integrated wear-resistant composite tube according to an embodiment of the present invention.
5 is a side cross-sectional view showing a state in which an over-contraction preventing member is installed during natural drying in a method of manufacturing a ceramic-integrated wear-resistant composite pipe according to an embodiment of the present invention.
6 is a side cross-sectional view showing a state in which a deformation preventing member is installed during heat treatment in a method of manufacturing a ceramic-integrated wear-resistant composite pipe according to an embodiment of the present invention.

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

As shown in FIG. 1, the ceramic-integrated wear-resistant composite tube 100 according to the embodiment of the present invention may include a ceramic core layer 110.

The ceramic core layer 110 may be formed in the shape of a tube so as to transfer the object to be transported therein.

The ceramic core layer 110 may be formed of a ceramic material to prevent damage to the inside of the ceramic core layer 110 when the object to be transported is transferred.

Ceramic material can be molded by mixing alumina powder and kaolin powder according to a preset ratio, and the ceramic material is molded in a mold having a shape corresponding to the shape of the tube to be molded, or in the shape of a tube by a drawing or injection device. Can be molded.

When the ceramic core layer 110 is formed in the shape of a tube by drawing or injection, it can be continuously molded to a required length, and can be continuously molded into a shape cut to a preset length.

As shown in FIG. 2, in the specification, the shape of the tube means not only the shape of a straight tube or a curved tube, but also the shape of a fitting member of various shapes connecting the tube.

When the ceramic core layer 110 is formed of a ceramic material, it may be formed by applying a shrinkage ratio of 13% to 14% according to drying.

On the other hand, when the ceramic core layer 110 is formed, natural drying is performed at room temperature after molding. When the natural drying is performed, the storage volume is minimized and it is erected to prevent deformation in the radial direction.

At this time, since the ceramic core layer 110 is in contact with the floor, the upper end without resistance shrinks more than the lower end due to frictional force with the floor, resulting in a molding defect in which the diameters of both ends are changed.

In order to prevent this, when the ceramic core layer 110 is naturally dried, it may be naturally dried in a state in which the over-shrinkage prevention member 200 is seated on the top of the ceramic core layer 110.

When the upper part of the ceramic core layer 110 is contracted, the over-contraction prevention member 200 generates resistance inside the upper end of the ceramic core layer 110 so that the upper part of the ceramic core layer 110 is compared with the lower part. It is possible to prevent excessive shrinkage (see Fig. 5).

The over-contraction preventing member 200 may be formed in a shape including a shape whose diameter gradually decreases from top to bottom, for example, in a conical shape, a hemispherical shape, or a spherical shape.

Here, when the over-contraction preventing member 200 is formed in a spherical shape, the lower part of the spherical shape may perform the function of the over-contraction preventing member 200.

In addition, the over-contraction prevention member 200 may have an air distribution hole 210 formed therethrough so that air can flow into the ceramic core layer 110 while seated on the ceramic core layer 110. have.

The over-shrinkage prevention member 200 has the ceramic core layer 110 so that the portion with the smallest diameter is partially inserted into the upper portion of the ceramic core layer 110 so that the upper portion is placed over the inner circumference of the ceramic core layer 110. ) Can be formed to have a larger circumference than the inner circumference.

For example, when the over-shrinkage prevention member 200 is contracted as the upper part of the ceramic core layer 110 is dried, the inner circumference of the ceramic core layer 110 is in close contact with the over-shrinkage prevention member 200 to generate a frictional force. Because it gives resistance to the part, it is possible to prevent the occurrence of over-contraction in the upper part.

In addition, the over-shrinkage prevention member 200 does not restrict the contraction by being pinched in the inner circumference of the ceramic core layer 110 as the contraction occurs in the ceramic core layer 110, but As a result, the over-contraction prevention member 200 slides upward by a shape that becomes narrower toward the bottom, thereby allowing the contraction.

In addition, the over-contraction preventing member 200 may include a friction reducing member 230.

When the upper inner circumference of the ceramic core layer 110 is contracted by reducing the friction between the ceramic core layer 110 and the over-contraction member 200, the over-contraction member 200 moves upward. It is not possible to slide and prevent the over-contraction preventing member 200 from restricting the contraction by being pinched on the upper end of the ceramic core layer 110.

On the other hand, the friction reducing member 230 reduces the friction between the over-contraction preventing member 200 and the ceramic core layer 110 to facilitate the over-contraction preventing member 200 according to the contraction of the ceramic core layer 110. It may be positioned between the over-contraction preventing member 200 and the ceramic core layer 110 so as to slide.

Here, the friction reducing member 230 may be implemented as a synthetic resin sheet, for example, a polyvinyl alcohol-based synthetic fiber (135, PVA) sheet, and the friction reducing member 230 is pre-attached to the over-shrinkage preventing member 200 and installed. Alternatively, it may be installed in a form in which the over-contraction preventing member 200 is mounted on the upper surface of the friction reducing member 230 while the friction reducing member 230 is mounted on the upper surface of the ceramic core layer 110.

In addition, a fine air hole may pass through the friction reducing member 230 so that air may flow.

The naturally dried ceramic core layer 110 may be manufactured in a form in which heat treatment is performed at a high temperature so that the structure is dense.

During heat treatment, deformation preventing members 300 formed of a ceramic material having the same moisture content as the ceramic core layer 110 are installed at both ends to prevent deformation due to different shrinkage at both ends of the ceramic core layer 110. After the heat treatment can be performed (see Fig. 6).

As shown in FIG. 1, the ceramic-integrated wear-resistant composite pipe 100 according to an embodiment of the present invention may include a resin reinforcing layer 130.

The resin reinforcing layer 130 may be formed on the ceramic core layer 110 to surround the outer surface of the ceramic core layer 110 to reinforce hardness to prevent the ceramic core layer 110 from being easily damaged.

Here, although the ceramic core layer 110 has excellent wear resistance, since it can be easily damaged by an external impact, the resin reinforcing layer 130 may be formed to prevent the ceramic core layer 110 from being damaged.

The resin reinforcing layer 130 may be formed of synthetic resin, and the synthetic resin may be a resin such as polyester or epoxy resin.

In addition, the synthetic resin may be fiber 135 reinforced plastic including fiber 135, and fiber 135 may be carbon fiber 135, glass fiber 135, aromatic nylon fiber 135 such as Kevlar, etc. , The fibers 135 may be in a woven form.

Here, it is preferable to apply the glass fiber 135, which is relatively inexpensive in manufacturing cost, as the fiber 135, but may be implemented as a fiber 135 formed of various materials according to the required strength.

Meanwhile, in the synthetic resin forming the resin reinforcing layer 130, the resin is applied to the ceramic core layer 110, and before the resin is cured, the resin is impregnated to attach the fiber 135 for imparting rigidity, and then the fiber ( The resin reinforcing layer 130 may be formed on the outer surface of 135) in a form in which the fibers 135 are applied so that they are not visually visible from the outside.

The synthetic resin for forming the resin reinforcing layer 130 may be mixed with a reinforcing additive to enhance the physical properties of the resin reinforcing layer 130.

The reinforcing additive may be mixed with one or two or more of a durability reinforcing agent for reinforcing abrasion resistance, a strength reinforcing agent for increasing strength, and an anti-shrinkage agent for reducing the shrinkage rate during curing of the synthetic resin.

The durability modifier may be, for example, silicon carbide powder or alumina powder, the strength modifier may be glass bead powder, and the shrinkage inhibitor may be PMMA (ploy methyl meth acrylate) powder.

Here, the shrinkage inhibitor among the reinforcing additives is preferably essentially mixed because when the synthetic resin shrinks while curing, the ceramic core layer 110 is suppressed and may be damaged.

On the other hand, when the resin reinforcing layer 130 is formed of synthetic resin, not only is it easy to manufacture, but it is relatively light in weight compared to metal, so that transportation and construction are easy.

As shown in FIG. 1, the ceramic-integrated wear-resistant composite pipe 100 according to an embodiment of the present invention may include a bonding layer 120.

The bonding layer 120 may be positioned between the ceramic core layer 110 and the resin reinforcing layer 130 to bond the ceramic core layer 110 to the resin reinforcing layer 130.

The bonding layer 120 may be implemented with a bonding agent capable of bonding metal or ceramic.

The bonding layer 120 is formed in a form in which a bonding agent is applied to the outer surface of the ceramic core layer 110, and a resin reinforcing layer 130 is formed on the outer surface of the bonding agent before the bonding agent is cured. And the resin reinforcement layer 130 can be bonded.

At this time, the outer surface of the ceramic core layer 110 is surface-treated to have an uneven surface to increase the bonding area of the bonding layer 120 to improve bonding.

Since the ceramic core layer 110 can have a smooth surface by minimizing voids after heat treatment due to the characteristics of the ceramic material, when the resin reinforcing layer 130 is formed by the bonding layer 120 without surface treatment, it is likely to be easily separated. There is.

To prevent this, the outer surface of the ceramic core layer 110 on which the bonding layer 120 is located may be surface-treated to have an uneven surface, and the surface treatment is a form of polishing the outer surface of the ceramic core layer 110 by a polishing machine. It can be formed by

As shown in FIG. 1, the ceramic-integrated wear-resistant composite tube 100 according to an embodiment of the present invention may include a UV-blocking flame retardant layer 150.

The UV-blocking flame retardant layer 150 may protect the resin reinforcing layer 130 formed of synthetic resin from ultraviolet rays and fire.

The UV-blocking flame-retardant layer 150 may be formed in a form in which a known paint including a material having both flame retardancy and UV-blocking properties is applied to the outer surface of the resin reinforcing layer 130.

Here, since the resin reinforcing layer 130 is formed of synthetic resin, corrosion occurs when exposed to ultraviolet rays for a long time due to its characteristics, and there is a problem that it is vulnerable to fire.

Accordingly, a UV-blocking flame-retardant layer 150 is formed on the outer surface of the resin reinforcing layer 130 to protect the resin reinforcing layer 130 from ultraviolet rays, and have flame retardancy to protect from fire.

The actions and effects between the components described above will be described together with a method of manufacturing the ceramic-integrated wear-resistant composite tube 100 according to an embodiment of the present invention.

3 and 4, in the method of manufacturing the ceramic-integrated wear-resistant composite tube 100 according to an embodiment of the present invention, first, a ceramic core layer 110 is formed (S10).

The ceramic core layer 110 is kneaded by stirring a ceramic material such as alumina powder and kaolin with water, and the kneaded ceramic material is molded into a tube shape (S11).

When the ceramic core layer 110 is formed in the shape of a tube, it may be continuously formed in a mold in which a molding groove corresponding to the shape of the tube is formed, or in a form of injection or drawing.

At this time, the ceramic core layer 110 may be formed in the shape of an integral tube (excluding the length direction) rather than assembling each other, and when forming the ceramic core layer 110, a shrinkage ratio of 13 to 14% is applied. The mixing ratio of ceramic material and water can be determined so that it can be done.

If the shrinkage ratio is less than 13%, it is not only difficult to mold because the physical properties are hard, and there is a high probability of cracking after heat treatment.If the shrinkage ratio is more than 14%, the physical properties are weakened and deformation can easily occur due to its own weight after molding. Drying may take a long time.

Meanwhile, when the forming of the ceramic core layer 110 is completed, the ceramic material is naturally dried at room temperature to solidify the ceramic material, and the natural drying may be performed in a form in which the ceramic material is left at room temperature for about 3 to 4 days (S13).

Here, when the ceramic core layer 110 is naturally dried, it is dried by laying it in the longitudinal direction and drying it upright because it is deformed in the diameter direction, which has relatively weak strength. When drying it upright, the lower part and the upper part in contact with the floor Due to the difference in air flow and the frictional force of the bottom, the contraction of the top occurs more than the bottom.

In order to prevent this, natural drying is performed while the ceramic core layer 110 is erected and the over-shrinkage preventing member 200 is seated on the ceramic core layer 110.

As shown in FIG. 5, the over-contraction prevention member 200 is seated on the ceramic core layer 110 so that a narrow area is inserted into the ceramic core layer 110, and the over-contraction prevention member 200 and A frictional force reducing unit is positioned between the ceramic core layers 110 to reduce frictional force between the ceramic core layer 110 and the over-contraction preventing member 200.

In this way, when natural drying is performed while the over-contraction preventing member 200 is seated on the ceramic core layer 110, when the upper part of the ceramic core layer 110 is contracted, the over-contraction preventing member 200 is While pushing up to generate resistance due to shrinkage, it is possible to prevent the occurrence of molding defects due to the occurrence of excessive shrinkage in the upper portion than in the lower portion of the ceramic core layer 110.

When the natural drying of the ceramic core layer 110 is completed, heat treatment is performed so that the structure of the ceramic material is dense (S15, S17).

When performing the heat treatment, the first heat treatment (S15) is performed at a preset temperature, and the second heat treatment (S17) is performed at a temperature higher than the temperature performed in the first heat treatment.

The temperature when performing the first heat treatment is performed at about 400°C, the temperature when performing the second heat treatment is performed at a temperature of about 1200°C or higher, and the first and second heat treatments are ceramic cores dried in a kiln. This can be done by bringing in the layer 110.

The time for the first heat treatment and the second heat treatment may vary depending on the moisture content of the formed ceramic core layer 110, the size of the kiln, and the carrying amount, but the first heat treatment takes approximately 10 hours or more, and the second heat treatment takes 24 hours. It may take more than an hour.

As shown in FIG. 6, when heat treatment is performed, a ceramic material having the same moisture content as when manufacturing the ceramic core layer 110 is naturally dried in the same natural drying, and then transformed on the top and bottom of the ceramic core layer 110. In the state in which the prevention member 300 is installed, it may be carried into a kiln for heat treatment and heat treated.

The deformation preventing member 300 covers and seals the upper and lower ends of the ceramic core layer 110, respectively, and the deformation preventing member 300 has a fitting groove 310 into which both ends of the ceramic core layer 110 are inserted and fitted. Thus, it is possible to minimize the occurrence of deformation of both ends by straddling the fitting grooves 310 during heat treatment, and to prevent the occurrence of poor heat treatment due to shrinkage to different sizes.

Here, the deformation preventing member 300 is formed of a ceramic material having the same moisture content as the ceramic core layer 110 to be heat treated, and naturally dried under the same conditions and then brought into the kiln together, so it has the same shrinkage rate. It shrinks together with the layer 110 and prevents heat treatment failure of the ceramic core layer 110 from occurring.

Further, the deformation preventing member 300 may be formed by passing through a plurality of heat distribution holes 330 so that internal heat and air are circulated and heat treated while covering both ends of the ceramic core layer 110.

When the first heat treatment and the second heat treatment of the ceramic core layer 110 are completed as described above, a wear resistance test is performed (S19).

As a wear resistance test method, only the ceramic core layer 110 that has passed the test after the wear resistance test according to the test method of ASTM D4060 is subjected to the following process.

When the test of the ceramic core layer 110 is finished, the outer surface of the ceramic core layer 110 is surface-treated so that fine irregularities are generated on the outer surface of the ceramic core layer 110.

Since the ceramic core layer 110 has a homogeneous surface due to its characteristics when heat treatment is performed, there is a concern that the resin reinforcing layer 130 is easily separated from the ceramic core layer 110 when the resin reinforcing layer 130 is formed in this state. .

To prevent this, the surface treatment is performed so that the outer surface of the ceramic core layer 110 has an irregular surface, and when the surface treatment is performed, the irregular surface may be formed in a form of polishing the external surface through a polishing machine.

Then, when the surface treatment of the ceramic core layer 110 is finished, a bonding agent is applied to the surface-treated outer surface of the ceramic core to form the bonding layer 120 (S20).

The bonding agent forming the bonding layer 120 may be implemented as a ceramic or metal adhesive, and it is preferable to use a bonding agent that satisfies ASTM D-1002 as the criterion for bonding strength.

On the other hand, when the bonding layer 120 is formed on the ceramic core layer 110, before the bonding layer 120 is cured, the resin reinforcing layer 130 may be formed on the outer surface of the bonding layer 120 (S30).

The resin reinforcing layer 130 is mixed with a reinforcing additive such as a strength reinforcing agent, an anti-shrinkage agent, a durability reinforcing agent, etc. to a synthetic resin in a preset ratio, and a synthetic resin mixed with the reinforcing additive is applied to the outer surface of the bonding layer 120 at a preset thickness.

Then, the fibers 135 constituting the synthetic resin are wound and laminated on the applied synthetic resin, and the fibers 135 may be laminated by a filament winding method.

When the fibers 135 are laminated on the synthetic resin, the resin reinforcing layer 130 is formed in a form in which the synthetic resin is cured by applying the synthetic resin again to a predetermined thickness so that the fibers 135 are not visible from the outside.

On the other hand, when the resin reinforcing layer 130 is formed, the bonding heat treatment is performed once again so that the ceramic core layer 110 and the resin reinforcing layer 130 are more firmly bonded by the bonding layer 120 and the structure becomes denser.

The bonding heat treatment may be heated to a preset temperature, and the preset temperature is a temperature at which the bonding layer 120 can be melted by heat. In an embodiment, the heat treatment is performed at a temperature of 80° C. or higher for about 2 hours or more.

Then, when the bonding heat treatment is completed, the surface treatment is performed so that the non-uniform outer surface is even and cut to a desired size.

On the other hand, when processing and cutting are completed, the appearance of the resin reinforcing layer 130, for example, the thickness and uniformity of the resin reinforcing layer 130, and the like, are inspected as a whole.

When the overall appearance inspection is completed, a UV-blocking flame-retardant layer 150 is formed in a form in which a paint having UV-blocking properties and flame-retardant properties is applied to the outer surface of the resin reinforcing layer 130 and cured (S40).

Here, the UV-blocking flame-retardant layer 150 prevents the resin reinforcement layer 130 formed of synthetic resin from being damaged by ultraviolet rays and has flame retardancy, thereby preventing the resin reinforcement layer 130 from being damaged by fire.

When the UV-blocking flame retardant layer 150 is formed in this way, it can be packaged and shipped in a desired shape.

Therefore, since the ceramic-integrated wear-resistant composite tube 100 and its manufacturing method according to the embodiment of the present invention are excellent in corrosion resistance and abrasion resistance by forming the ceramic core layer 110 of a ceramic material, various forms such as coal, chemicals, sand , Iron powder, seawater, etc. can minimize damage caused by transported objects.

In addition, since the ceramic core layer 110 is formed into an integrated tube shape, not only the shape of the tube of the desired shape but also the shape of fittings can be easily manufactured, mass production is easy, and joints are generated. By minimizing, it is possible to minimize the occurrence of abrasion at the joint and jamming of the conveyed object.

In addition, since the resin reinforcing layer 130 is formed of synthetic resin, it is light in weight, so that construction, transportation, and construction are easy, and manufacturing costs can be greatly reduced.

In addition, since the UV-blocking flame-retardant layer 150 is formed on the outer surface of the resin reinforcing layer 130, it has flame-retardant properties, thus minimizing damage caused by fire, as well as preventing damage to the resin reinforcing layer 130 by UV rays. have.

In addition, when the ceramic core layer 110 is naturally dried, the upper and lower ends of the ceramic core layer 110 are contracted at an uneven shrinkage rate because they are dried while the over-shrinkage preventing member 200 is seated, resulting in molding defects. Can be prevented.

In addition, when the ceramic core layer 110 is heat treated, the deformation preventing member 300 is formed of a ceramic material having the same moisture content as the ceramic core layer 110, and the deformation preventing member 300 is formed of the ceramic core layer 110. ) By inserting the heat treatment at both ends of the ceramic core layer 110, it is possible to minimize the occurrence of heat treatment defects due to shrinkage of both ends of the ceramic core layer 110 at different shrinkage rates.

In the above, the embodiments of the present invention have been described, but the scope of the present invention is not limited thereto, and the embodiments of the present invention are easily changed by those of ordinary skill in the technical field to which the present invention pertains and are recognized as equivalent. It includes all changes and modifications to the extent that it becomes available.

100: ceramic integrated wear-resistant composite tube 110: ceramic core layer
120: bonding layer 130: resin reinforcing layer
135: fiber 150: UV blocking flame retardant layer
200: over-contraction prevention member 210: air distribution hole
230: friction reducing member 300: deformation preventing member
310: fitting groove 330: heat distribution hole

Claims (15)

A ceramic core layer formed into a tube shape integrated with a ceramic material,
A resin reinforcing layer formed of synthetic resin, surrounding the outer surface of the ceramic core layer to prevent the ceramic core layer from being easily damaged,
A bonding layer positioned between the ceramic core layer and the resin reinforcing layer to bond the resin reinforcing layer to the ceramic core layer, and
Including a UV-blocking flame retardant layer formed of a material having UV-blocking and flame-retardant properties to protect the resin reinforcing layer from fire and UV,
The ceramic core layer
An over-shrinkage prevention member supporting the inner periphery of the upper end of the ceramic core layer to prevent molding defects according to the difference between the shrinkage rates of the upper and lower ends of the ceramic core layer when the ceramic material is naturally dried in the shape of a tube Dry naturally in the state of being settled,
The ceramic-integrated wear-resistant composite tube, wherein the outer surface of the ceramic core layer includes an uneven surface to improve the bonding property of the bonding layer. The method of claim 1,
The resin reinforcement layer
Ceramic-integrated wear-resistant composite tube, characterized in that it comprises a fiber for strengthening the hardness by impregnating the synthetic resin. The method of claim 1,
The synthetic resin is
Including a reinforcing additive mixed with the synthetic resin to reinforce the hardness of the resin reinforcing layer,
The reinforcing additive is a ceramic integrated wear-resistant composite tube, characterized in that it comprises a shrinkage inhibitor that prevents shrinkage due to hardening of the synthetic resin. The method of claim 1,
The ceramic material is
Ceramic integrated wear-resistant composite tube, characterized in that it is a mixture containing alumina powder and kaolin. delete delete The method of claim 1,
The over-contraction prevention member
A ceramic-integrated wear-resistant composite tube, characterized in that the ceramic-integrated wear-resistant composite tube includes a shape having an area that is slid upward while being pressed as the upper end of the ceramic core layer is contracted and decreases from top to bottom to support the inner periphery of the ceramic core layer. The method of claim 7,
The over-contraction prevention member
And a friction reducing member disposed between the ceramic core layer and the over-contraction preventing member so as to slide upward while being pressed as the upper end of the ceramic core layer is contracted. In the method for manufacturing a ceramic integrated wear-resistant composite tube according to claim 1,
Molding the ceramic material into a tube shape to form a ceramic core layer,
Forming a bonding layer on the outer surface of the ceramic core layer,
Forming a resin reinforcing layer on the outer surface of the bonding layer by the synthetic resin, and
Including the step of forming a UV-blocking flame-retardant layer by applying a material having UV-blocking and flame-retardant properties on the outer surface of the resin reinforcing layer,
The step of forming the ceramic core layer
Naturally drying the ceramic core layer formed in the shape of the tube,
Heat-treating the ceramic core layer naturally dried in the natural drying step at a preset temperature, and
Including the step of surface treatment to have an uneven surface on the outer surface of the ceramic core layer heat-treated in the heat treatment step,
The step of naturally drying the ceramic core layer
Manufacturing of a ceramic-integrated wear-resistant composite tube, comprising the step of seating an over-shrinkage preventing member supporting the upper inner circumference of the ceramic core layer to prevent molding defects according to the difference in shrinkage rates between the upper and lower ends of the ceramic core layer. Way. delete The method of claim 9,
The over-contraction prevention member
Fabrication of a ceramic-integrated wear-resistant composite tube, characterized in that it includes a shape having an area that decreases from top to bottom to support the inner circumference of the ceramic core layer while sliding upward while being pressed as the top of the ceramic core layer is contracted. Way. The method of claim 11,
The over-contraction prevention member
And a friction reducing member installed between the ceramic core layer and the over-contraction preventing member so as to slide upward while being pressed as the upper end of the ceramic core layer is contracted. The method of claim 9,
The heat treatment step
Primary heat treatment at a preset temperature, and
After the step of performing the first heat treatment, a step of performing a second heat treatment at a temperature higher than a predetermined temperature in the step of performing the first heat treatment. The method of claim 9,
The heat treatment step
A ceramic integrated wear-resistant composite tube, characterized in that it comprises the step of installing a deformation preventing member sandwiched between and supported at both ends of the ceramic core layer to prevent molding failure due to uneven shrinkage of the ceramic core layer when performing the heat treatment. Method of manufacturing. The method of claim 9,
The step of forming the resin reinforcing layer
Mixing a reinforcing additive with the synthetic resin,
Applying a synthetic resin mixed with the reinforcing additive to the bonding layer,
Attaching fibers to the synthetic resin applied to the bonding layer, and
And re-coating the synthetic resin so that the fibers are not visible from the outside and are covered by a ceramic-integrated abrasion-resistant composite tube.

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