KR20120130391A - A method for manufacturing membrane housing and a membrane housing manufactured by the method - Google Patents

Abstract

PURPOSE: A manufacturing method of a membrane housing and the membrane housing manufactured by the same are provided to prevent the generation of resin cracks in between fibers by ensuring uniform internal pressures. CONSTITUTION: A manufacturing method a membrane housing includes the following steps: a releasing agent is coated on a mandrel(100); reinforcing fiber with impregnated mixture of resin(400) and a hardener(500) is wound around the mandrel by rotating and transferring the mandrel left and right; the wound resin impregnated reinforcing fiber is hardened; the membrane housing is released; and the released membrane housing is post-treated. The releasing agent coating process further includes a process for coating a releasing agent on the mandrel and a prepreg and an insert ring, which are inserted into both end parts of the mandrel, and a heating process. [Reference numerals] (400) Resin; (500) Hardener

Description

A method for manufacturing membrane housing and a membrane housing manufactured by the method

The present invention relates to a method for producing a membrane housing for use in a reverse osmosis process in a desalination plant and to a membrane housing produced accordingly.

Currently used in the freshwater market, three processes are used: multi-stage evaporation, multi-utility and reverse osmosis. The multistage evaporation (MSF) process uses flashing, which is a phenomenon of instantaneous release of water vapor.

Reverse osmosis (RO) is a process that obtains pure fresh water by removing solutes dissolved in seawater using a semi-permeable membrane and osmotic pressure.

If the same amount of low concentration solution and semi-permeable membrane are placed between semi-permeable membranes, the amount of high concentration solution will gradually increase over time, and after a certain time the amount of high concentration solution will no longer increase. Equilibrium is achieved without This is called osmosis, and the difference between the high and low concentrations of water in equilibrium is called osmotic pressure. When an equilibrium state is applied with an osmotic pressure on the side of the high concentration solution, water, the solvent of the high concentration solution, passes through the membrane to the low concentration solution, and the solute does not pass through the membrane. This is called reverse osmosis. As such, a process of separating water, which is a solvent, from a solute in pressurized saline using a semi-permeable membrane is called reverse osmosis.

Conventionally, a metal housing such as stainless steel, an aluminum alloy, or a titanium alloy is used to manufacture a membrane housing used for reverse osmosis, or a metal or elastomer liner is installed inside and a high strength fiber is wrapped around the outside, or simply glass. There was a method of winding the fabric,

In the case of a metal housing, the weight is heavy, there is a problem of a sudden destruction of the explosive form in the aspect of fracture, and in the case of using a liner, there is a problem of fluid penetration between the liner and the high-strength fiber at high pressure, and simply wound the glass fiber In the case of manufacturing, even if the resin is cracked due to the internal pressure increases due to the internal pressure increases, even if the fluid is leaked or manufactured so that the leakage does not occur, there was a problem that the defect rate is high because bubbles are generated in the membrane housing during the curing of the glass fiber.

The present invention has been made to solve the above problems, and an object thereof is to provide a method for manufacturing a membrane housing using a mixture of glass fiber and resin.

The present invention provides a membrane housing manufacturing method comprising the step of applying a release agent to the mandrel; A winding step of winding the reinforcing fiber mixed with a resin and a curing agent to the mandrel to which the releasing agent is applied, and transferring the reinforcing fiber from side to side while rotating the mandrel; A curing step of transferring the mandrel from side to side and curing the wound reinforcing fiber; Demolding to demold the membrane housing formed by curing the reinforcing fibers; And a post-treatment step of post-processing the demolded membrane housing.

In addition, according to the present invention, the step of applying the release agent includes an oven heating step of applying a release agent to the prepreg and the insert-ring inserted in the mandrel and the both ends of the mandrel and heated in the oven. It features.

In addition, according to the present invention, the release agent applying step, after the oven heating step, during the winding step, wound the release film on the outer peripheral surface of the prepreg, the insert-ring outside the prepreg wound the release film And insert-ring inserting the prepreg and the insert-ring at both ends of the mandrel.

In addition, according to the present invention, the release agent applying step, between the winding step after the insert-ring insertion process, wound the veil (Veil) impregnated with the resin on the outer peripheral surface of the mandrel, and the outer surface of the veil It characterized in that it comprises a first squeezing process of squeezing the resin using a pressing device.

In addition, according to the present invention, the winding step, a winding step of winding the reinforcing fibers to the mandrel by transporting from side to side while rotating the mandrel; And a second squeezing process of squeezing the resin impregnated in the reinforcing fiber wound on the mandrel using the pressing device.

In addition, according to the present invention, the resin is an epoxy resin, the weight ratio ratio of the epoxy resin and the curing agent is characterized in that 100: 85.

Further, according to the present invention, the roller for supplying the reinforcing fiber is rotated before the reinforcing fiber is wound on the mandrel, the impregnation tank containing the epoxy resin and the curing agent is installed at the lower end of the roller by the rotation of the roller The epoxy resin and the hardener are in contact with the circumferential surface of the roller while being stirred, and the epoxy resin and the hardener in contact with the reinforcing fibers are impregnated.

In addition, according to the present invention, the oven heating process is characterized in that for 30 minutes at 70 ° C heated over 2-3 times.

In addition, according to the present invention, in the winding step, the angle of the reinforcing fiber wound on the mandrel is characterized in that for adjusting the left and right feed rate of the mandrel so that the helical direction relative to the longitudinal direction of the mandrel. .

Further, according to the present invention, the membrane housing is a reverse osmosis (RO) membrane housing, the membrane housing is composed of a body portion and a bell portion, the bell portion is located on both sides of the body portion and the thickness of the body portion It is characterized by a thicker.

In addition, according to the present invention, the angle of the reinforcing fiber wound on the mandrel is characterized in that the helical direction with the inclination angle with respect to the longitudinal direction of the mandrel and the hoop direction of the circumferential direction of the mandrel.

Further, according to the present invention, the inclination angle of the helical direction is 55 °, the bell portion is the mandrel in the bell portion in the left and right transfer step of the mandrel to wind the thickness of the reinforcing fiber thicker than the body portion It is characterized in that the left and right feed speed is slower than the left and right feed speed in the body portion to be wound in the hoop direction in the bell portion.

In addition, according to the present invention, the reinforcing fiber is a glass fiber, characterized in that the thickness is 0.1mm, the width is 5mm.

In addition, according to the present invention, by adjusting the tension of the glass fiber in the winding step characterized in that the epoxy resin content contained in the glass fiber is 60-65 Vol%.

In addition, according to the present invention, the curing step is to increase the temperature by 2-5 ° C per minute from room temperature to 80 ° C while rotating the mandrel in the oven to prevent the flow of the epoxy resin and to produce a uniform membrane housing , 2-3 hours at 80 ° C., 2-5 ° C. per minute from 80 ° C. to 130-135 ° C., 2-3 hours at 130-135 ° C., 130- It is characterized by cooling over 3 hours at room temperature at 135 ° C.

In addition, according to the present invention, the demolding step is characterized in that the horizontal tolerance of the mandrel is adjusted to ± 0.1 ° using a horizontal gauge, and demolded using a jig using a hydraulic device.

In addition, according to the present invention, the post-processing step is a cutting step for cutting both ends of the membrane housing, a grinding step for processing the outer surface, a hole processing step for processing the hole, a painting step for painting on the outer surface It is characterized by including.

In addition, according to the present invention, the painting step is characterized by removing dust using a high pressure washer, drying the cleaned membrane housing, and painting on the outer surface of the dried membrane housing.

In addition, according to the present invention, characterized in that it comprises an inspection step of inspecting the membrane housing after the post-processing step.

According to the present invention, the inspection step includes the membrane housing thickness test, the epoxy resin and glass fiber weighing, the membrane housing weight measurement, the Barcol Hardness test, the pressure resistance leak test, and the visual inspection. It features.

The membrane housing according to the invention is characterized in that it is manufactured by any one of the membrane housing manufacturing methods described above.

Membrane housing manufacturing method for inserting the prepreg and insert ring according to the present invention by winding the glass fiber and through the membrane housing prepared according to the heavy weight of the conventional metal housing and the rapid destruction of the explosive form in the fracture pattern Can solve the problem of

In the case of a conventional housing using only a liner, or in a conventional housing using a liner, the membrane housing in the process of curing the glass fiber, even if the manufacturing process to prevent the fluid leak or leaks due to resin cracks between the fibers due to the increase in the internal pressure There was a problem that the defect rate was high because bubbles were created in

By inserting the prepreg, the bubble escapes through the prepreg, reducing the defect rate due to the bubble generation, winding the veil impregnated with the synthetic resin, and winding the glass fiber on it, thereby making it possible to produce the internal pressure uniformly. To prevent cracking of the resin,

By inserting the insert ring in advance, there is an effect that the assembly can be easily completed without any additional process when installing the stopper in the end port in the assembly step.

1 is a schematic view of a RO membrane housing 1 manufactured according to the method of manufacturing a membrane housing according to the invention.
Figure 2 is a schematic diagram of a membrane housing manufacturing apparatus according to the present invention.
3 is a schematic view of compressing and squeezing a resin-impregnated veil wound mandrel and a winding mandrel according to the present invention.
Figure 4 is a schematic diagram of the direction in which the reinforcing fibers according to the invention wound on the mandrel.
5 is a flowchart illustrating a method of manufacturing a membrane housing according to the present invention.
Figure 6 is a temperature, time graph for each section of the curing step according to the present invention.
7 is a flowchart of a post processing step according to the present invention.
8 is a specific flowchart of the release agent applying step and the winding step according to the present invention.
9 is a schematic diagram of an insert ring and a prepreg (resin penetration processing material).
10 is a schematic diagram of inserting the insert ring and the prepreg into the mandrel.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, it should be noted that the same components or parts among the drawings denote the same reference numerals whenever possible. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted so as not to obscure the subject matter of the present invention.

1 is a schematic view of a RO membrane housing 1 manufactured according to the method of manufacturing a membrane housing according to the invention.

Membrane housing 1 according to the present invention is the outer diameter of the bell portion (2) at both ends is larger than the outer diameter of the body portion 3, the inner diameter is constant along the longitudinal direction, the bell portion (2) ) Is thicker than the thickness of the trunk (3).

Figure 2 is a schematic diagram of a membrane housing manufacturing apparatus according to the present invention.

The mandrel 100 is rotatably installed in the membrane housing manufacturing apparatus while the release agent 200 is coated and the resin-impregnated nonwoven fabric or veil 700 is wound on the applied outer surface, and the mandrel 100 The roller 600 is rotatably installed at a predetermined distance from the roller 600, and the impregnating tank 800 is installed by being spaced downward from the vertical direction of the roller 600, and the resin 400 and the hardener 500 are disposed in the impregnating tank 800. ) Is continuously supplied at a constant speed.

By the rotation of the roller 600, the resin 400 contained in the impregnation tank 800 and the curing agent 500 are agitated and mixed, and the synthetic resin mixed on the surface of the roller 600 is adsorbed.

The fiber supply device 900 for supplying the bundle of reinforcing fibers 300 to the mandrel 100 includes a tension control unit for adjusting a predetermined tension of the reinforcing fibers 300 between the mandrel 100.

The bundle of reinforcing fibers 300 is supplied to the mandrel 100 while maintaining a constant tension, and the roller 600 installed between the mandrel 100 and the fiber supply device 900 has a synthetic resin adsorbed on the surface of the roller. The synthetic resin is impregnated into the bundle of the reinforcing fiber 300 according to the rotation of the 600 is supplied to the mandrel 100.

The roller impregnation type resin impregnation tank is used when winding the reinforcing fiber, and this impregnation tank can sufficiently infiltrate the resin into the reinforcing fiber with low tension, control the amount of resin, and damage the fiber. There is a small advantage. In order to measure the pressing pressure of the roller 600 during the process, a pressure cell is installed in the drum.

3 is a schematic view of compressing and squeezing a mandrel wound with a resin-impregnated bale 700 and a mandrel subjected to a winding step according to the present invention.

After impregnating the resin to the nonwoven fabric or the veil 700, the resin-impregnated nonwoven fabric or the veil 700 is wound on the mandrel 100 to which the release agent is applied, and the mandrel 100 wound around the nonwoven fabric or the veil 700. When the membrane housing 1 is manufactured by winding the reinforcing fiber 300), the nonwoven fabric or the veil 700 forms the inner surface of the membrane housing 1 without being demolded when demolded, and the nonwoven fabric or the veil 700 is manufactured. By the inner surface of the membrane housing (1) is evenly eliminated an imbalance that may be a problem when winding the reinforcing fiber 300, and impregnated with resin to wind the nonwoven fabric or the veil 700, so that the reinforcing fiber 300 and Lamination force is also improved, and has the effect of withstanding high pressure and preventing the cracking of the synthetic resin generated at high pressure.

The resin 400 is impregnated with a non-woven fabric or a veil 700 wrapped in the mandrel 100, and then squeezed by squeezing from side to side using a pressing device 1200, for example, a spatula-shaped tool (aka hera). 400 goes through the first squeezing process (S130) to prevent the flow.

In addition, while the mandrel 100 is passed through the winding step (S210) of winding the reinforcing fiber 300 to the mandrel and the inclination angle (α) while transferring the mandrel 100 impregnated with synthetic resin to the left and right simultaneously with the rotation. In the state in which the reinforcing fiber 300 is wound, the resin 400 impregnated in the reinforcing fiber 300 is subjected to a second squeezing process (S220), which is similarly squeezed using the pressing device 1200. For winding with a high content of the reinforcing fiber 300 is to squeeze the resin 400 using the pressing device 1200 to increase the compression effect on the surface of the membrane housing (1) wound.

Figure 4 is a schematic diagram of the direction in which the reinforcing fibers according to the invention wound on the mandrel.

As shown in FIG. 4, the reinforcing fiber 300 forms an inclination angle α with respect to the longitudinal direction (X axis) of the mandrel 100 and is wound by adjusting the left and right feed rates of the mandrel 100. In the trunk portion 2, the inclination angle α is maintained at about 55 °, and in the bell portion 3, the circumferential direction of the mandrel, that is, the hoop direction, for winding the reinforcing fiber 300 thicker than the trunk portion 2 Follow along.

To this end, the left and right feed rates of the mandrel 100 at the bell portion 3 are later than the feed rates at the trunk portion 2 so as to be in the hoop direction.

Here, the most preferable reason for keeping the inclination angle α at about 55 ° is due to the stress analysis method below.

Since the filament winding composite material may be regarded as a laminate having a macroscopically laminated symmetry structure, a laminate structure and a stress analysis method may be applied. However, in general, since the wound product is mainly subjected to internal pressure, the netting analysis is mainly used for the stress analysis method. Two perpendicular stresses in the plane can be combined in one direction. Even in filament winding, if the force of two perpendicular forces in the axial direction and the circumferential direction coincides with the fiber direction, all the stresses generated by the internal pressure are received in the tensile direction of the fiber, thereby maximizing the efficiency of the material.

A) Network stress analysis

Setting the winding angle of the fiber to 54.75 degrees allows the fiber to receive both the circumferential and axial stress forces.

B) Stress analysis of composite winding structure

In general, since windings are wound using the axial, circumferential, and helical directions together, another stress analysis method is required. John proposed the stress analysis method.

5 is a flowchart illustrating a method of manufacturing a membrane housing according to the present invention.

In the membrane housing manufacturing method according to the present invention, as shown in Figure 5, by applying the release agent 200 to the mandrel 100 or wound the release film, the membrane housing 1 is the final product is easy from the mandrel 100 After the preparation of the release agent (S100) for applying the release agent 200 to the outer surface of the mandrel 100 so that the mold can be demolished, the preparation of the mandrel 100 coated with the release agent 200 or the release film on the outer surface Rotating the mandrel 100 is moved to the left and right to reinforce the reinforcing fiber 300 inclined along the circumferential surface of the mandrel 100, at this time, the reinforcing fiber 300 before the winding to the mandrel 100 After impregnating the synthetic resin, which is a mixture of 400 and the curing agent 500, and wound on the mandrel, the reinforcing fiber 300 is wound around the mandrel 100 through a winding step (S200).

Epoxy resins, vinyl ester resins, and polyester resins are widely used as winding resins. Resin 400 according to the present invention can be used a variety of resin, but particularly preferably using an epoxy resin. Epoxy resin is more expensive than other resins, but through proper choice of resin and hardener, it can give the desired electrical and chemical properties, and it is very adhesive, so it has high bonding strength between resin and reinforcing fiber, and excellent resin It has chemical properties. In addition, it shows excellent dimensional stability because of shrinkage during hardening reaction compared to other thermosetting resins, long-term storage, very long pot life depending on the degree of modification, no by-products such as water during reaction, and good processability This is because it has overheating properties.

While winding the reinforcing fiber 300 impregnated in the synthetic resin to the mandrel 100, the mandrel 100 must be rotated continuously to wind the reinforcing fiber 300, and at the same time to the left and right transport movement Therefore, the reinforcing fiber is wound with the longitudinal direction and the inclination angle (α) of the mandrel 100 according to the left and right feed rate of the mandrel in the present invention will be referred to as helical direction.

By transferring the mandrel 100 to the left and right reinforcement fibers are wound in multiple layers on the mandrel 100, the left and right feed speed and rotational speed of the mandrel 100, reinforcement fibers wound on the mandrel 100 The thickness of 300 is adjustable according to the specifications of the membrane housing 1 to be produced.

After the reinforcement fiber 300 is wound around the mandrel 100 and the membrane housing 1 to be produced is completed, the mandrel 100 and the reinforcement fiber 300 wound on the mandrel are cured.

Figure 6 is a temperature, time graph for each section of the curing step (S300) according to the present invention.

The curing step (S300) according to the present invention, as shown in Figure 6, at room temperature while rotating the mandrel 100 in the oven to prevent the flow of epoxy resin and to produce a uniform membrane housing (1) Heat up to 80 ° C. at 2-5 ° C. per minute, maintain 2-3 hours at 80 ° C., warm up at 80 ° C. at 130 ° C. to 135 ° C. at 2-5 ° C., 130-135 ° Maintain 2-3 hours at C, and cooled to room temperature at 130-135 ° C. over 3 hours.

Through the time and temperature section according to the present invention, a uniform membrane housing 1 is produced and withstands high pressure, and cracking between resins does not occur at high pressure. If other temperature ranges and times are set, the resin flows down and the possibility of defects in the membrane housing 1 increases.

After the mandrel 100 and the reinforcing fiber 300 are cured in an oven, a shape of the membrane housing 1 to be produced is prepared, and a demolding step of separating the membrane housing 1 and the mandrel 100 is performed. It goes through (S400).

What is important in the demolding step (S400) is that when the mandrel 100 is installed in the demolder, the male mold must be correctly fitted so that the membrane housing 1 can be pressurized in the longitudinal direction of the mandrel 100 using a jig using a hydraulic device without any defects. It can be demoulded, and for this purpose, the horizontal tolerance of the mandrel 100 should be adjusted to ± 0.1 ° by using a level gauge.

The demolded membrane housing 1 undergoes various post-treatment steps (S500), and after undergoing an inspection step (S600) for checking the suitability of the quality of the membrane housing 1 which has undergone the post-treatment step (S500), the membrane After completing the assembly step (S700) is coupled to the various components to the housing (1), the product is ready for delivery through the packaging step (S800).

7 is a flowchart of a post processing step according to the present invention.

As shown in Figure 7, the post-processing step (S500) is a cutting process (S510) for cutting both ends of the membrane housing (1), grinding process (S520) for processing the outer surface, hole processing for processing holes Process (S530), characterized in that it comprises a painting step (S540) for painting on the outer surface.

More specifically, in the cutting process (S510), the demolded membrane housing 1 is installed in the cutter after horizontal confirmation, and the length between the grooves between the insert-rings 1100 of both sides inserted into the mandrel 100 is measured. The demolded product is cut while rotating at a constant speed, about 10-20 rpm. Cutting speed of the cutter is 1 ~ 10 mm / min, cutter rotation speed is 5000 ~ 7000 rpm, the material of the cutter is recommended to use a diamond tool to quickly cut and minimize the damage of the product.

In addition, in the grinding process (S520), similarly to the cutting process (S510), the demolded membrane housing 1 is installed through a water check, and the outer depth of the membrane housing 1 is measured to measure a processing depth of about 0.5 to 1.0 mm and a speed. Set the depth (approximately 1 to 10 mm / min and the moving machining speed to about 500 to 1000 mm / min). Because the surface is smooth, it consumes less when painting and the surface is glossy, so the material uses diamond tool, and after the external surface is processed, sandpaper is used to smooth the surface.

In addition, in the hole processing step (S530), the demolded membrane housing 1 is installed after water-proof confirmation, and when the inner peripheral surface of the membrane housing to be processed by the side port 4 is processed at a speed of about 1 to 5 mm / min. In the case of the side port (4), the hole is drilled using a saw drill at a speed of about 5 to 15 mm / min. Particularly, if the vibration occurs during the hole processing, the hole size of the product may be defective. Therefore, the installation of the membrane housing 1 and the installation of the saw blade drill and the diamond tool should be performed in a firmly fixed position so as not to shake.

The hole processing is made in the bell portion 2 of the membrane housing 1, and the hole for inserting the side port 4 is processed, and the side port 4 is treated in the membrane housing 1. It acts as an inlet and outlet for water input.

In addition, the painting process (S540) is a cleaning procedure for removing dust using a high pressure washer (S541), drying the cleaned membrane housing and drying procedure (S542), painting procedure for painting on the outer surface of the dried membrane housing (S543) ) And a painting drying procedure S544 for drying the painted membrane housing 1 again.

The washing procedure (S541) is to load the three membrane housing (1) to the dedicated washing trolley, and reciprocating the inside and outside of the membrane housing (1) by adjusting the pressure of about 100 ~ 160 bar with a high pressure washer connected to the trolley Wash. Connect the air hose to take an air shower and move the cart to the drying process. Dust removal is particularly important during cleaning.

The drying procedure S542 is a process of moving the washed membrane housing 1 to a bogie and drying it. The membrane housing 1 is dried while being rotated in a fixed position. Drying temperature and time is preferably about 40 minutes at about 60 ° C.

After completing the drying procedure (S542), the membrane housing (1) undergoes a painting procedure (S543). The membrane housing (1) mounted on the jig for checking the state of the product after cleaning and drying procedures and checking the surface condition Check. If there is no bonding on the surface, mix the paint and insert the mixed amount of paint into the presser to check if the air pressure of the mounted air line is about 5 ~ 6 bar and spray it through the spray gun. The spray gun can control the amount of paint sprayed.

When the spray is completed, the thinner is ejected in a certain amount to clean the nozzle of the spray gun, and the spray gun is disassembled and washed in the thinner liquid.

After completion of the painting procedure (S543), the membrane housing (1) is moved back to the drying furnace to go through the painting drying procedure (S544), which, like the drying procedure (S542), rotates the membrane housing (1) at about 60 ° C. Allow to dry for 60 minutes.

Membrane housing (1) after the various post-processing step (S500), the membrane housing thickness test, epoxy resin and glass fiber weighing, membrane housing weight measurement, Barcol Hardness test, pressure resistance leakage test, visual inspection, etc. After going through, all head components are inspected for damage and this is called an inspection step (S600).

Membrane housing 1 that satisfies a predetermined condition through all these inspection steps (S600) is the O-ring to the side port 4, the sealing member 6 such as bearing plate, sealing plate, adapter, snap ring, etc. To go through the assembly step (S700) for coupling to the membrane housing (1).

Finally, the ASME code symbol and product identification number are stamped on the name plate, and the final product is delivered through a packaging step (S800) in which the membrane housing (1) is packaged in plastic, and the plurality of final products are packed in a wooden box so as not to be damaged. Preparation is complete.

Figure 8 is a specific flow chart of the release agent application step and the winding step according to the invention, Figure 9 is a schematic diagram of the insert ring and prepreg (resin penetration processing material), Figure 10 is a schematic diagram inserting the insert ring and prepreg in the mandrel to be.

As shown in Figure 8 to 10, the release agent application step (S100) is the prepreg 1000 and the insert-ring (1100) is applied to the release agent 200 to about 30 times in a 70 ℃ oven 2-3 times After the oven heating step (S110) for heating for a minute,

After the oven is heated, the prepreg 1000, the insert-ring 1100 and the mandrel 100 are removed from the oven, and then the release film is wound around the outer circumferential surface of the prepreg 1000, and the insert-ring ( 1100 is inserted into the pre-preg 1000 and the insert-ring 1100 at both ends of the mandrel 100 through an insert-ring insertion process S120, and after inserting the insert-ring 1100, the mand A first squeegeeing process (S130) of winding a veil (Veil; 700) impregnated with epoxy resin on the outer circumferential surface of the reel 100 and squeezing the epoxy resin using the pressing device 1200 on the outer surface of the veil 700. Characterized in that it comprises a.

After finishing the first squeezing process (S130), the winding step (S200) according to the present invention to rotate the mandrel 100 and at the same time to convey the left and right, reinforcing fibers impregnated with the resin 400 and the curing agent 500 The outer surface of the winding process (S210) and the mandrel 100, the winding of the reinforcing fiber 300 is wound (300) to the mandrel 100, the same as the first squeezing process (S130), crimping, such as Hera It characterized in that it comprises a second squeezing process (S220) for squeezing the epoxy resin using the apparatus 1200.

The insert-ring 1100 has an annular groove in the circumferential direction on the inner circumferential surface, and the sealing member 6 is coupled along the annular groove. That is, the insert ring 1100 is inserted into the inner circumferential surface of both end bell portions 3 of the membrane housing in the final product, and the insert ring 1100 is end port 5 of both openings of the membrane housing. Since the sealing member 6 inserted into the ring member 6 is coupled along the annular groove, the sealing member 6 may be easily coupled without a separate subsequent process.

The release film wound on the outer circumferential surface of the prepreg 1000 may solve the problem that the prepreg 1000 is not easily demolded when only the release agent is applied.

The release film allows the prepreg 1000 to be easily demolded from the mandrel 100 in the demolding step S500 of the membrane housing, and the prepreg 1000 has bubbles generated in a state in which the reinforcing fiber 300 is wound. It exits to the outside through the porous layer of the prepreg 1000 serves to prevent bubble defects in the membrane housing (1) of the final product.

In addition, the prepreg 1000 may be fixed so that the insert ring 1100 is fixed to the mandrel 100.

The resin according to the present invention is preferably epoxy resin, and the weight ratio to the curing agent is preferably 100: 85.

The ratio of the weight ratio between the epoxy resin and the hardener is excellent in pressure resistance to withstand high pressure at 100: 85, resin cracking between reinforcing fibers does not occur at high pressure, and leakage does not occur.

In general, glass fibers, carbon fibers, aramid fibers and the like are widely used as reinforcing fibers. The most widely used glass fiber is the most inexpensive, stable in dimensions, moderate in strength and non-rigidity, and easy to handle when winding. And when selecting the fiber to be filament winding, the following matters should be selected carefully. Since continuous reinforcing fibers should not be broken in the middle, a fiber with sufficient tension should be selected, and a fiber without fluff should be selected to prevent void formation, resin contamination, and short circuit during winding. In order to improve the impregnation, it is necessary to select sizing fibers suitable for the resin.

Here, sizing means applying gelatinous materials or other materials to increase strength or stiffness or to reduce absorbency.

The reinforcing fiber according to the present invention is glass fiber, the thickness is 0.1mm, the width is 5mm is preferred in the strength and pressure resistance of the product.

In the winding step (S200) according to the present invention by adjusting the tension of the glass fiber so that the epoxy resin content contained in the glass fiber is 60-65 Vol%, by the tension of the glass fiber wound on the mandrel 100 Allow the phenomenon to occur.

While the invention has been shown and described in connection with specific embodiments thereof, it is conventional in the art that various changes, modifications and variations are possible without departing from the spirit and scope of the invention as indicated by the appended claims. Anyone who knows the knowledge of is easy to know.

1: membrane housing 2: bell portion
3: body part 4: side port
5: end port 6: sealing member
100: mandrel 200: release agent
300: reinforcing fiber 400: resin
500: hardener 600: roller
700: veil 800: impregnation tank
900: fiber feeder 1000: prepreg
1100: insert ring 1200: crimping device
S100: release agent applying step S110: oven heating process
S120: insert-ring insertion process S130: first squeezing process
S200: winding step S210: winding process
S220: second squeezing process S300: curing step
S400: demolding step S500: post processing step
S510: Cutting Process S520: Grinding Process
S530: Hole Making Process S540: Painting Process
S541: cleaning procedure S542: drying procedure
S543: Painting procedure S544: Painting drying procedure
S600: Inspection step S700: Assembly step
S800: Packing Step

Claims (21)

A release agent applying step of applying a release agent to the mandrel;
A winding step of winding the reinforcing fiber mixed with a resin and a curing agent to the mandrel to which the releasing agent is applied, and transferring the reinforcing fiber from side to side while rotating the mandrel;
A curing step of transferring the mandrel from side to side and curing the wound reinforcing fiber;
Demolding to demold the membrane housing formed by curing the reinforcing fibers; And,
A membrane housing manufacturing method comprising a post-treatment step of post-processing the demolded membrane housing.
The method of claim 1,
The release agent applying step
Membrane housing manufacturing method comprising an oven heating step of applying a release agent to the mandrel and prepreg and insert-rings inserted at both ends of the mandrel and heated in an oven
The method of claim 2,
The release agent applying step,
Between the winding step after the oven heating process,
An insert-ring wound around an outer circumferential surface of the prepreg, inserting the insert-ring outside the prepreg wound with the release film, and inserting the prepreg and the insert-ring at both ends of the mandrel Membrane housing manufacturing method comprising an insertion process.
The method of claim 3,
The release agent applying step,
Between the winding steps after the insert-ring insertion process,
And a first squeegeeing process of winding a veil in which the resin is impregnated on the outer circumferential surface of the mandrel, and squeezing the resin by using a crimping device. .
5. The method of claim 4,
The winding step,
A winding step of winding the reinforcing fiber around the mandrel by transferring the left and right while rotating the mandrel; And
And a second squeezing process of squeezing the resin impregnated in the reinforcing fiber wound on the mandrel using the pressing device.
The method of claim 5,
The resin is an epoxy resin, the weight ratio ratio of the epoxy resin and the curing agent is a membrane housing manufacturing method, characterized in that 100: 85.
The method according to claim 6,
The roller for supplying the reinforcing fiber is rotated before the reinforcing fiber is wound on the mandrel,
An impregnation tank containing the epoxy resin and the curing agent is installed at the lower end of the roller, and the epoxy resin and the curing agent contacted and contact the circumferential surface of the roller while the epoxy resin and the curing agent are mixed by the rotation of the roller. Membrane housing manufacturing method, characterized in that the fiber is impregnated
The method of claim 7, wherein
The oven heating process is a membrane housing manufacturing method characterized in that the heating for 30 minutes 2-3 times at 70 ° C temperature.
9. The method of claim 8,
In the winding step,
Membrane housing manufacturing method characterized in that the angle of the reinforcing fiber wound on the mandrel to adjust the left and right feed rate of the mandrel so that the helical direction relative to the longitudinal direction of the mandrel
10. The method of claim 9,
The membrane housing is a reverse osmosis (RO) membrane housing,
The membrane housing is composed of a body portion and a bell portion,
The bell portion is located on both sides of the body portion and the membrane housing manufacturing method, characterized in that thicker than the thickness of the body portion
The method of claim 10,
The angle of the reinforcing fiber wound on the mandrel is a membrane housing manufacturing method characterized in that the helical direction with the inclination angle with respect to the longitudinal direction of the mandrel and the hoop direction of the circumferential direction of the mandrel.
The method of claim 11,
The inclination angle of the helical direction is 55 °, and the bell portion has the mandrel left and right conveying speed at the bell portion in the left and right conveying step of the mandrel to wind the thickness of the reinforcing fiber thicker than the body portion. Membrane housing manufacturing method characterized in that it is wound in the hoop direction from the bell portion to be slower than the left and right feed speed.
The method of claim 12,
The reinforcing fiber is a glass fiber, the thickness is 0.1mm, the width of the membrane housing manufacturing method characterized in that 5mm.
The method of claim 13,
Membrane housing manufacturing method characterized in that in the winding step to adjust the tension of the glass fiber so that the epoxy resin content contained in the glass fiber is 60-65 Vol%.
15. The method of claim 14,
The curing step is to increase the temperature by 2-5 ° C per minute from room temperature to 80 ° C while rotating the mandrel in the oven to prevent the epoxy resin from flowing down and to produce a uniform membrane housing, 2 at 80 ° C Hold for 3 hours,
Raise the temperature by 2-5 ° C per minute from 80 ° C to 130-135 ° C, hold 2-3 hours at 130-135 ° C,
Membrane housing manufacturing method characterized in that cooled to room temperature at 130-135 ° C over 3 hours.
16. The method of claim 15,
The demolding step is a membrane housing manufacturing method characterized in that to adjust the horizontal tolerance of the mandrel to ± 0.1 ° using a horizontal gauge, using a jig using a hydraulic device.
17. The method of claim 16,
The post-processing step includes a cutting step for cutting both ends of the membrane housing, a grinding step for processing an outer surface, a hole processing step for processing holes, and a painting step for painting on the outer surface. Housing manufacturing method
18. The method of claim 17,
The painting step is a membrane housing manufacturing method, characterized in that to remove dust using a high-pressure cleaner, to dry the washed membrane housing, and to paint on the outer surface of the dried membrane housing.
19. The method of claim 18,
Membrane housing manufacturing method comprising the step of inspecting the membrane housing after the post-processing step.
20. The method of claim 19,
The inspection step includes a membrane housing thickness test, the epoxy resin and glass fiber weighing, the membrane housing weight measurement, Barcol Hardness test (Barcol Hardness test), pressure resistance leak test, characterized in that it comprises a visual inspection .
A membrane housing manufactured according to the membrane housing manufacturing method according to any one of claims 1 to 20.

Images