KR101360177B1 - Pullout molding apparatus and method of incombustible fiberglass reinforced plastic - Google Patents

Abstract

The present invention relates to a pullout molding apparatus and method of an incombustible fiberglass reinforced plastic, capable of continuously manufacturing an aqueous resin by diluting it with water and mixing it with an incombustible fiber or an incombustible wire. The apparatus comprises a reinforcing material supplying part supplying a reinforcing material; a resin impregnation part impregnating a resin aqueous solution with a aqueous resin and a flame retardant dissolved into a plurality of the reinforcing materials being supplied from the reinforcing material supplying part; a drier heating a fiberglass reinforced plastic in a prepreg state to dry moisture contained in the fiberglass reinforced plastic; a molding part passing the fiber-reinforced plastic and applies heat and pressure to mold it with a preset shape and size; and a movable presser which is movably installed to be horizontal to a drawing direction by a first liner moving unit at one side of the molding part and horizontally moves and pulls the fiberglass reinforced plastic while applying heat and pressure to the fiberglass reinforced plastic.

Description

Pullout Molding Apparatus and Method of Incombustible Fiberglass Reinforced Plastic}

The present invention relates to an apparatus and method for producing a non-combustible fiber reinforced plastic, and more particularly to a draw molding apparatus and method of a non-combustible fiber-reinforced plastic that can continuously produce a fiber-reinforced plastic having a non-flammable or flame retardant in a draw molding method It is about.

In general, "FRP (Fiber Reinforced Plastics)" refers to fiber-reinforced plastics, which are composited with reinforcing materials such as fibers, and which are reinforced with mechanical strength, heat resistance, tension and impact resistance. Also called fibre-reinforced resin or reinforced plastics.

These FRPs are capable of forming at room temperature and normal pressure and are resistant to corrosion of acids, alkalis, salts, solvents, seawater, etc., and have excellent corrosion resistance. It is semi-permanent material which is lighter than aluminum and stronger than iron and has superior corrosion resistance, heat resistance and corrosion resistance, and has a very high strength. It is widely used in industrial industries in USA, Japan and Europe.

However, although the FRP is widely used in the entire industry, studies on the fire resistance that can cope with fire are relatively insufficient.

In order to solve this problem, in Korea Patent No. 10-1049879, a thermosetting resin containing a methylol group and an inorganic flame retardant is mixed, dispersed by adding a solvent, and diluted in purified water to prepare a resin aqueous solution, the A method of producing a flame retardant fiber-reinforced plastic by impregnating flame retardant fibers in an aqueous resin solution is disclosed.

The flame-retardant fiber-reinforced plastic manufacturing method of the registered patent is prepared by dissolving a thermosetting resin and an inorganic flame-retardant material containing a methylol in water, do not use a volatile solvent and do not release volatile organic contaminants after molding, The flame retardancy is very good.

However, the method of manufacturing a flame-retardant fiber-reinforced plastic of the registered patent has a problem that it is difficult to apply in an actual industrial site because it does not present a system for continuously producing a flame-retardant fiber-reinforced plastic in the industrial field.

Republic of Korea Patent Registration No. 10-0929842 (November 26, 2009 registration): Flammable molded FRP product with flame retardancy Republic of Korea Patent No. 10-0880805 (January 21, 2009 registration): non-opening injection drawing molding apparatus of fiber reinforced composite material

The present invention is to solve the above problems, an object of the present invention is to dilute the water-soluble resin in water with additives and to mix the reinforcing materials such as flame retardant fibers or flame retardant wire rods to be continuously produced in a pull-molding method In the manufacturing process, it is possible to increase the dispersibility of the main resin and to maintain the composition of the additive uniformly to maximize the molding density to provide a draw molding apparatus and method of the non-combustible fiber reinforced plastics that can improve the quality, such as flame retardancy and strength have.

In order to achieve the above object, a draw molding apparatus for a non-combustible fiber reinforced plastic according to the present invention includes a reinforcing material supply unit to which a reinforcing material is supplied; A resin impregnation portion for impregnating a plurality of reinforcing materials supplied from the reinforcing material supplying portion with a resin aqueous solution in which a water-soluble resin and a flame retardant are dissolved in water; A dryer for drying the moisture contained in the fiber reinforced plastic by applying heat to the fiber reinforced plastic in the preflag state supplied from the resin impregnating unit; A molded part formed of a fiber-reinforced plastic having a predetermined shape and size by applying heat and pressure while passing the fiber-reinforced plastic that has passed through the dryer; It is installed on the one side of the molding portion by the first linear moving means to reciprocate horizontally in the drawing direction, and movable horizontally while applying the heat and pressure set to the fiber-reinforced plastic passed through the molding portion to pull the fiber-reinforced plastic It is characterized by including a press.

In addition, the draw-molding method of the non-combustible fiber reinforced plastic according to the present invention for achieving the above object is impregnated in the aqueous resin solution in the resin impregnation portion by pulling the reinforcement by a predetermined length, and to make a prepreg state and ; Drying the fiber-reinforced plastic in the pre-flag state supplied from the resin impregnation unit by applying heat to the fiber-reinforced plastic in a set temperature range in a dryer; Molding the fiber reinforced plastic into a fiber reinforced plastic having a predetermined shape and size while passing the molded part; The mobile press machine includes a step of pulling the fiber reinforced plastic to a predetermined length by moving horizontally while applying heat and pressure set to the fiber reinforced plastic.

According to the present invention, by diluting a water-soluble resin, for example, a thermosetting resin containing a methylol group and an inorganic flame retardant in water, it is possible to continuously produce a non-flammable reinforced plastic which can obtain excellent flame retardancy and tensile strength by a pultrusion method. It works.

In particular, the present invention is to perform the drawing operation by pulling the fiber-reinforced plastic while applying a set pressure under the set temperature conditions, the mobile press can ensure excellent flame-retardant performance and strength, it is effective to perform the drawing process quickly and efficiently have.

1 is a side view schematically showing the configuration of a draw molding device of a non-combustible fiber reinforced plastic according to an embodiment of the present invention.
FIG. 2 is a side view illustrating a structure of a molding part of the drawing molding apparatus of FIG. 1. FIG.
3 is a plan view of the molding part of FIG. 2.
4 is a front view showing the structure of a mobile press of the drawing apparatus of FIG.
5 is a front view showing the structure of a drawing machine of the drawing device of FIG.
6A and 6B are side views illustrating an operating state of a mobile press machine and a drawer of the draw molding apparatus of FIG. 1.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the apparatus and method for drawing the incombustible fiber reinforced plastic according to the present invention.

Referring to FIG. 1, a drawing device of a non-combustible fiber reinforced plastic according to an embodiment of the present invention includes a reinforcing material supply part 10, a resin impregnation part 20, a dryer 30, a molding part 40, and a movable part. Press machine 50, the drawer 60 is made of a configuration that is continuously arranged in-line (in-line).

As the reinforcing material 1 supplied through the reinforcing material supply unit 10, a flame retardant fiber made of any one of glass fiber or carbon fiber, or a thin rod-shaped flame retardant wire made by mixing phenol resin or melamine resin may be used. have. The reinforcing material (1) serves to greatly improve the tensile strength of the fiber reinforced plastics.

When the reinforcing material is a flame retardant fiber, the reinforcing material is wound around the cylindrical roving 11 and pulled out of the roving 11 while being pulled in the drawing process. The reinforcing material supply unit 10 includes a guide 12 for guiding through a plurality of holes to supply a plurality of reinforcing materials (flame retardant fibers) released from the roving 11 in a form for molding.

The resin impregnation unit 20 includes an impregnation tank 21 in which a resin aqueous solution in which a water-soluble resin and a flame retardant are dissolved in water is stored. The reinforcing material 1 drawn out of the reinforcing material supply part 10 is impregnated with the aqueous resin solution while passing through the impregnation tank 21. The resin aqueous solution stored in the impregnation tank 21 is mixed with a thermosetting resin containing 20 to 30% by weight of methylol group relative to the total weight of the resin aqueous solution and 10 to 25% by weight of inorganic flame retardant relative to the total weight of the resin aqueous solution, the resin aqueous solution After dispersing by adding 1 to 10% by weight of the solvent to the total weight, it is prepared by diluting in water of 50 to 60% by weight relative to the total weight of the aqueous resin solution. When the content range of the thermosetting resin, inorganic flame retardant, solvent and water containing methylol group in the aqueous solution is out of the above range, the physical properties of the final product, the flame-retardant fiber-reinforced plastic, for example, specific gravity, Bacol hardness, water absorption, tensile Strength, flexural strength, flexural modulus, wear resistance, etc. are remarkably inferior.

The thermosetting resin containing the methylol group is preferably methylolmelamine or methylolphenol resin, and the inorganic flame retardant may be at least two selected from the group consisting of aluminum hydroxide, magnesium hydroxide, zinc borate, triammonium phosphate and antimony trioxide And the amount thereof is preferably 30 to 50% by weight based on the weight of the thermosetting resin containing the methylol group. The methylol melamine or methylol phenol resin has the advantage of improving the binding force with the flame retardant fiber. In addition, when two or more kinds of the above inorganic flame retardant materials are used in the above-mentioned weight% range, it is easy to dissolve in water, and it is easy to mix and dilute with a resin in an aqueous solution state and the flame retardant can be dispersed And does not emit volatile organic pollutants (VOCs) after molding of the resin.

In the impregnation tank 21, the thermosetting resin penetrates into the reinforcing material 1, is made into a prepreg state in a semi-cured state, and is supplied to the dryer 30.

The dryer 30 applies the heat of 100 ~ 250 ℃ to the fiber reinforced plastic (2) of the pre-flag state to dry the moisture contained in the fiber reinforced plastic. The dryer 30 includes a heater (not shown), a blowing fan (not shown), and a condenser (not shown) to remove moisture from the fiber-reinforced plastic 2 in a manner to continuously circulate hot air. Moisture removed from the fiber-reinforced plastics 2 by the dryer 30 is approximately 50-60% of the total moisture content, and a portion of the residual moisture is removed from the molding portion 40. If the moisture is not sufficiently removed from the fiber-reinforced plastic (2), because the strength and flame retardancy of the fiber-reinforced plastic (2) can not be secured, the operation of removing water and gas is a process that must be performed.

The molding part 40 is a process in which the fiber-reinforced plastics 2 passing through the dryer 30 pass through heat and pressure to be molded into reinforcement plastics of a predetermined shape and size and at the same time remove gas and moisture. It is a component part which consists of.

2 and 3, the molding part 40 is formed such that a tapered slit 411 whose area gradually decreases toward the traveling direction is opened so that the fiber-reinforced plastic 2 is pressed while passing through the fiber. A vent mold (41) having a first heater (412) for applying heat to the reinforcement plastic (2) to remove gas and moisture; Side by side installed on one side of the vent mold 41 is formed so that the molding slit 421 having a predetermined area is opened to have a desired final shape and size while the fiber-reinforced plastic (2) passing through the vent mold 41 is opened. And a guide mold 42 having a second heater 422 that removes residual gas and water by applying heat to the fiber reinforced plastic 2.

The plurality of vent molds 41 are arranged at regular intervals so that gas and moisture can be discharged through the spaces between the vent molds 41. The tapered slit 411 of the vent mold 41 is made to pass through the fiber-reinforced plastic 2 under pressure while gradually decreasing the upper and lower thicknesses and the left and right widths along the drawing direction. In addition, the vent mold 41 is provided with a first heater 412 on each of the upper and lower portions to heat the fiber reinforced plastic (2) passing through the vent mold 41 to remove gas and moisture.

The guide mold 42 is disposed inline immediately behind the vent mold 41, and the molding slit 421 having a predetermined area is formed in the front-rear direction so that the fiber-reinforced plastic 2 passes and has a desired shape and size. It is formed to be open. The molding slit 421 has a slightly larger area only at the inlet of the front end, and the rest of the molding slit 421 has a constant area, so that the size and shape of the final product to be made by the fiber-reinforced plastic 2 passing through the molding slit 421. It is molded into a fiber-reinforced plastic (2) having a.

A second heater 422 is also installed on each of the upper and lower portions of the guide mold 42 to transfer heat to the fiber reinforced plastic 2.

The movable press machine 50 is installed in the rear portion of the molding part 40 so as to reciprocate horizontally along the drawing direction by the first linear moving means, and the heat set in the reinforced plastic passing through the molding part 40. And horizontally moving under pressure to pull the reinforced plastic. The mobile press 50 is preferably pressurized fiber-reinforced plastic (2) at a pressure of 15 ~ 200 kg / ㎠ under a temperature condition of 120 ~ 200 ℃.

The mobile press 50 is composed of two sets and reciprocates horizontally with a constant stroke. A pneumatic / hydraulic cylinder may be used as the first linear moving means for horizontally moving the mobile press 50. In addition, various well-known linear moving means such as a ball screw, a motor, a chain sprocket, and a motor may be applied. .

Referring to FIG. 4, the mobile presses 50 of this embodiment move along the guide rails 55 formed to extend along the drawing direction of the fiber-reinforced plastics 2 by the first linear moving means. And a press lower mold 52 fixedly mounted on the press body 51 and having a cavity 521 having a shape corresponding to that of the fiber-reinforced plastic 2 that is drawn out, and the press lower mold 52 of the press lower mold 52. A press upper mold 53 configured to move upward and downward by an elevating means 54 to pressurize the fiber-reinforced plastic 2 on the press lower mold 52 at a predetermined pressure, and the press upper mold 53 to transfer heat; It comprises a heater (not shown) installed in the upper mold 53 and / or the lower press mold 52. The upper press mold 53 presses the fiber-reinforced plastic 2 at a predetermined pressure while moving up and down by lifting means such as a pneumatic cylinder or a hydraulic cylinder.

The drawer 60 is installed in the rear of the movable press 50 so as to reciprocate horizontally along the drawing direction by a second linear moving means (for example, pneumatic / hydraulic cylinder). The drawer 60 is composed of a pair of two to move together, grasps the fiber-reinforced plastic (2) passed through the mobile press machine 50 and moves horizontally to pull the reinforcement plastic by a predetermined length.

The drawer 60 has a structure similar to the mobile press machine 50 as shown in Figure 6, unlike the mobile press machine 50 does not apply the pressure set on the fiber-reinforced plastic (2) the upper plate ( 62 is lowered by the elevating means 63 (for example, pneumatic / hydraulic cylinder) to perform the action of simply grasping and pulling the fiber-reinforced plastic 2 together with the lower plate 61. The upper plate 62 and / or lower plate 61 of the drawer 60 so that the drawer 60 can apply heat to the fiber reinforced plastic 2 when the drawer 60 grasps and pulls the fiber reinforced plastic 2. It is preferable that a heater (not shown) is provided.

Referring to the process of drawing the non-combustible fiber reinforced plastic using the draw molding apparatus of the present invention configured as described above in more detail as follows.

In the roving 11 of the reinforcing material supply unit 10, the reinforcing material 1 is impregnated in the resin aqueous solution in the resin impregnating part 20 while pulling the reinforcing material 1 by a predetermined length, and the fiber-reinforced plastic semi-finished product in a prepreg state Make it.

And the fiber-reinforced plastic (2) of the pre-flag state made in the resin impregnated part 20 is introduced into the dryer 30 to pass through the dryer (30). The fiber-reinforced plastics 2 passing through the dryer 30 are heated by the dryer 30 at a set temperature range of 100 to 250 ° C. to remove moisture and gas. The moisture removed at this time is about 50 to 60% of the total moisture content.

The fiber-reinforced plastics 2 passing through the dryer 30 pass through the vent mold 41 and the guide mold 42 of the molding part 40 in order. The fiber-reinforced plastic 2 passing through the vent mold 41 is gradually pressurized while passing through the tapered slit 411 of the vent mold 41 and heat is applied to remove moisture and gas. At this time, since the water and the gas is discharged to the outside through the space between the plurality of vent mold 41, the water and the gas is discharged smoothly.

The fiber-reinforced plastic 2 is formed into a predetermined size and shape while passing through the molding slit 421 of the guide mold 42, and is heated and retained by the second heater 422 inside the guide mold 42. Water and gas are removed.

The fiber-reinforced plastic 2 that has passed through the guide mold 42 is pulled by a predetermined length while being heated and pressurized by the mobile press machine 50. The movable press machine 50 is a pressure of the upper press mold 53 is lowered in the state that the fiber-reinforced plastic (2) is placed in the cavity 521 of the press lower mold 52 to set the fiber-reinforced plastic (2), for example For example, pressurization is performed at a pressure of 15 to 200 kg / cm 2, and the press main body 51 moves horizontally along the guide rails 55 by a predetermined distance in this pressurized state to pull the fiber-reinforced plastic 2 by a predetermined length.

The fiber-reinforced plastics 2 are pressurized by the mobile press machine 50 at the set pressure under the set temperature conditions, thereby obtaining physical properties such as flame retardancy and strength.

The fiber reinforced plastic 2 passed through the mobile press 50 is gripped by the drawer 60 is pulled by a predetermined length. At this time, the drawer 60 and the mobile press 50 are pulled in the fiber reinforced plastic (2) alternately while moving in the opposite direction. That is, as illustrated in FIG. 6A, when the mobile press machine 50 moves a predetermined distance in the drawing direction (rear, leftward direction in the drawing) while pressing the fiber reinforced plastic 2, the extractor 60 is formed of the fiber reinforced plastic 2. ) Is horizontally moved forward in the opposite direction to the mobile press machine 50 in a freely laid state without gripping. Subsequently, as shown in FIG. 6B, the movable press machine 50 lifts the press upper mold 53 (see FIG. 4) to release the pressurized state of the fiber-reinforced plastic 2 and to move forward a certain distance forward. The horizontal movement of the drawer 60, the upper plate 62 is lowered to hold the fiber reinforced plastic (2) with the lower plate 61 and to move horizontally to the rear to pull the fiber reinforced plastic (2).

As such, the mobile press machine 50 and the drawer 60 may move in opposite directions to each other, thereby pulling the fiber-reinforced plastics 2 alternately to further improve the working speed.

Meanwhile, while the drawer 60 grips and pulls the fiber reinforced plastic 2, the performance of the fiber reinforced plastic may be further improved by applying heat to the fiber reinforced plastic in the drawer 60.

The fiber reinforced plastic that has passed through the drawer 60 is cut into desired lengths by a cutter not shown in the figure.

According to the present invention, by diluting a water-soluble resin, for example, a thermosetting resin containing a methylol group and an inorganic flame retardant in water to produce a non-flammable reinforced plastic that can obtain excellent flame retardancy and tensile strength in a pull-out method continuously Can be.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the present invention as defined by the appended claims. And it is to be understood that such modified embodiments belong to the scope of protection of the present invention defined by the appended claims.

1: reinforcement 2: fiber reinforced plastic
10: reinforcing material supply unit 11: roving
12: guide 20: resin impregnation
21: impregnation tank 30: dryer
40: forming part 41: vent mold
411: tapered slit 412: first heater
42: guide mold 421: molding slit
422: second heater 50: mobile press
51: press body 52: press lower mold
53: press upper mold 54: elevating means
60: Drawer 61: Lower plate
62: upper plate 63: elevating means

Claims (18)

A reinforcing material supply unit 10 to which a reinforcing material is supplied;
A resin impregnation part 20 for impregnating a plurality of reinforcing materials supplied from the reinforcing material supply part 10 with a resin aqueous solution in which a water-soluble resin and a flame retardant are dissolved in water;
A dryer (30) for drying the moisture contained in the fiber reinforced plastic by applying heat to the fiber reinforced plastic (2) in the preflag state supplied from the resin impregnated portion (20);
A molded part 40 formed by forming a fiber-reinforced plastic having a predetermined shape and size by applying heat and pressure while passing the fiber-reinforced plastic that has passed through the dryer 30;
One side of the forming part 40 is installed to be reciprocated horizontally along the drawing direction by the first linear moving means, and is applied horizontally while applying heat and pressure set to the fiber-reinforced plastic passed through the forming part 40. A mobile press machine 50 for moving and pulling the fiber reinforced plastics;
The molding part 40,
The tapered slit 411 which gradually decreases in area toward the traveling direction is opened so that the fiber reinforced plastic is pressurized while passing through, and the first heater 412 which removes gas and water by applying heat to the fiber reinforced plastic is provided. A vent mold 41 provided;
Side by side installed on one side of the vent mold 41 is formed so that the molding slit 421 having a predetermined area is opened to have a desired final shape and size while the fiber-reinforced plastic passed through the vent mold 41, the fiber And a guide mold (42) having a second heater (422) for removing residual gas and water by applying heat to the reinforcement plastic. According to claim 1, wherein one side of the mobile press (50) is installed by the second linear moving means in a horizontal reciprocating direction along the drawing direction, to hold the fiber-reinforced plastic passed through the mobile press (50) Drawing device of the non-combustible fiber reinforced plastic, characterized in that it further comprises a drawer 60 to move horizontally to pull the fiber reinforced plastic by a predetermined length. The apparatus of claim 1, wherein the plurality of movable presses (50) are arranged side by side and simultaneously move horizontally reciprocally by the first linear moving means. 3. The apparatus of claim 2, wherein the plurality of the drawers (60) are arranged side by side and simultaneously move horizontally by the second linear moving means. The apparatus of claim 2, wherein the mobile press machine (50) and the drawer (60) are pulled by a predetermined length alternately while moving in opposite directions. delete 2. The drawing of the non-combustible fiber reinforced plastic according to claim 1, wherein a plurality of the vent molds (41) are arranged at regular intervals so that gas and moisture are discharged through the spaces between the vent molds (41). Forming device. The method of claim 1, wherein the mobile press 50,
A press main body 51 moving along the guide rail 55 formed to extend along the drawing direction of the fiber reinforced plastic by the first linear moving means;
A press lower mold 52 fixed to the press body 51 and having a cavity of a shape corresponding to the fiber-reinforced plastic being drawn out;
The press upper mold 53 which is installed on the upper side of the press lower mold 52 so as to be movable up and down by lifting means 54 to pressurize the fiber-reinforced plastic on the press lower mold 52 at a set pressure. )and;
The press-molding apparatus of the non-combustible fiber reinforced plastic, characterized in that it comprises a heater installed in the upper press mold (53) or the lower press mold (52). The apparatus of claim 1, wherein the reinforcing material is a flame retardant fiber which is either glass fiber or carbon fiber. The apparatus of claim 1, wherein the reinforcing material is a thin rod-shaped flame retardant wire made by mixing a glass with a phenol resin or a melamine resin. The draw molding apparatus according to claim 2, wherein the drawer (60) is provided with a heater to apply heat while pressing the fiber reinforced plastic. Immersing the reinforcing material in a predetermined length while pulling the reinforcing material into the resin aqueous solution in the resin impregnating part 20, and making the prepreg state;
Drying the fiber-reinforced plastic in the pre-flag state supplied from the resin impregnation unit (20) by applying heat to the fiber-reinforced plastic in a set temperature range in the dryer (30);
Molding the fiber-reinforced plastic into a fiber-reinforced plastic having a predetermined shape and size while passing through the molding unit 40, and heating the fiber-reinforced plastic to remove gas and moisture;
Claims 1 to 5 and 7 to 11 characterized in that the mobile press machine 50 comprises a step of pulling the fiber-reinforced plastic to a certain length by moving horizontally while applying the heat and pressure set to the fiber-reinforced plastic. A draw molding method of a nonflammable fiber reinforced plastic using the draw molding apparatus according to any one of claims. 13. The method of claim 12, further comprising the step of pulling the fiber reinforced plastic by a predetermined length by the horizontal press of the drawer 60 while the mobile press 50 does not pressurize the fiber reinforced plastic. Drawing method of non-combustible fiber reinforced plastic which is made. The method of claim 13, wherein the mobile press machine (50) and the drawer (60) are pulled by a predetermined length alternately while moving in opposite directions. The method of claim 12, wherein the mobile press machine 50 presses the fiber reinforced plastic at a pressure of 15 to 200 kg / cm 2 under a temperature condition of 120 to 200 ° C. delete The method of claim 12, wherein the aqueous resin solution is mixed with a thermosetting resin comprising 20 to 30% by weight of methylol groups relative to the total weight of the aqueous resin solution and 10 to 25% by weight of inorganic flame retardant relative to the total weight of the aqueous resin solution, the total weight of the aqueous resin solution After dispersing by adding 1 to 10% by weight of the solvent, and then diluted by 50 to 60% by weight of water relative to the total weight of the aqueous resin solution. The method of claim 12, wherein in the dryer (30), the fiber-reinforced plastic is dried at a temperature of 100 to 250 ° C.

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