KR200172038Y1 - Shell structure of Fiberglass Reinforced Plastics barrel - Google Patents

Abstract

The present invention relates to a shell structure of FRP (Fiberglass Reinforced Plastics) cylinder, and more specifically, glass chop, roving, glass roving cloth is laminated and molded first. Of glass shell, roving, glass chopped strand mat (Laminated glass chopped strand mat) in the secondary structure of the ALF barrel structure, while maintaining a high strength compared to the shell of conventional FLP It is intended to provide a shell structure of FRP container manufactured by thin shell thickness and resisting external pressure.

Description

Shell structure of Fiberglass Reinforced Plastics barrel

The present invention relates to a shell structure of FRP (Fiberglass Reinforced Plastics) barrel, and more specifically, manufactured with a thin shell thickness while maintaining a high strength compared to the shell of the conventional FRP barrel, the drag against external pressure It is about the shell structure of this strong RF container.

Typically, RF is used in various forms in various industries, for example, widely used in sewage treatment facilities such as pipes, tank tanks, septic tanks.

As a molding method for producing a predetermined shape using the FRP, the hand lay up method, the spray up method, the sheet molding compound method, the filament winding method Etc.

The filament winding method is mainly used to produce a cylindrical shape, and is divided into parallel type, helical type, polar type, level type, etc. according to the method of winding the reinforcing material. Of these, the helical type is the most commonly used.

In particular, the filament winding molding method is a FRP molding method using the strength (100 ~ 350kg / ㎣) of the glass fiber to the maximum, the most characteristic is that the molded using the glass fiber without cutting, pipe, tank, It is applied to manufacturing sewage treatment facilities such as water tanks and septic tanks.

The basic process of the filament winding forming method is to rotate the mandrel, wound the continuous reinforcing agent impregnated on the surface of the resin to a predetermined thickness and cured, and then demolded to achieve a certain shape of alfalfa barrel, and the reinforcing agent as resin Prepreg impregnated with (prepreg: impregnated to some extent by impregnating unsaturated polyester resin on the cross base of glass fiber material) may be used.

In addition, the resin, epoxy resins, polyester resins, vinyl ester resins are used a lot, the curing agent is used in various types depending on the curing method.

On the other hand, as described above according to the method of winding the reinforcement to the mandrel, there are parallel (helical), helical (polar) type, polar (level), level (Level) type, mainly the material cost is low, material and directionality The helical method having this uniform advantage is used a lot, and the shell structure of the FRP barrel manufactured by this helical method, as shown in the accompanying FIG. 3, has a thickness of 12 to 14 mm. The FLP mat 52 is positioned above and below, and the FRP mat mat 52 is filled with a resin 54 in which small particles of the roving 14 are mixed.

However, the conventional shell of the FRP barrel as described above has the following disadvantages.

First, when used as a pressure-resistant product, a sweating phenomenon called whipping is likely to occur.

Second, there is a disadvantage that the thickness is increased to sufficiently withstand the external pressure, such as underground buried.

Third, cracks may occur between the resin and the glass fiber, and shrinkage may occur during curing, thereby lowering the retention strength.

Fourth, the smell of the resin in the impregnation tank during the molding operation deteriorates the working environment and causes a decrease in productivity.

Therefore, the present invention has been made in view of the above disadvantages, glass chop, roving, glass roving cloth so as to have the advantages of excellent strength, excellent productivity, and low peeling phenomenon. ) Is firstly laminated molded, and glass chop, roving, glass chopped strand mat (laminated glass chopped strand mat) in order to provide a shell structure of the F Alpi barrel of the second laminated structure.

1 is a cross-sectional view showing a monolayer structure for the shell of the FLP barrel according to the present invention,

Figure 2 is a schematic diagram showing a state of manufacturing a FRP barrel according to the present invention,

3 is a cross-sectional view showing a shell of a conventional FLP container.

<Explanation of symbols for the main parts of the drawings>

10: FLP shell 12: glass shock

14: roving 16: glass roving cross

18: glass chopped strand mat 20: mandrel

22: pressing roller 24: roller

26: injection device 28: transfer path means

30: mounting member 40: primary molding layer

42: 2nd forming layer 52: FRP Mat

54: resin

Hereinafter, described in detail with reference to the accompanying drawings of the present invention.

The shell 10 structure of the FLP container of the present invention has a glass chop (12), a roving (14), and a glass roving cloth (16) stacked on each other in order from the inside. The glass shaping 12 and the roving 14 are sequentially formed on the surface of the primary shaping layer 40 and the glass roving cross 16 of the primary shaping layer 40 formed so that their widths overlap each other. ), The glass chopped strand mat (glass chopped strand mat) (18) is characterized by a structure consisting of a secondary molding layer 42 laminated laminated molding so that its width overlaps by 1/2.

In particular, the total thickness of the shell 10 of the FRP barrel is 11 mm, and the primary shaping layer 40 has a thickness of 2 mm and a combination of the roving 14 and the glass roving cross 16, respectively. As the thickness is laminated to 0.5 mm and the width is overlapped by 1/2, the second molding layer 42 has a total thickness of 5 mm, and the secondary shaping layer 42 has a thickness of 2 mm and a roving 14 of the glass fin 12, respectively. And the combined thickness of the glass chopped strand mat 16 is laminated to 1mm, and the laminated width is characterized in that the laminated thickness of 6mm in total by overlapping by 1/2.

In addition, the primary shaping layer 40 and the secondary shaping layer 42 are formed to be staggered in a different direction from each other.

Herein, the present invention will be described in more detail with reference to the accompanying drawings.

1 is a view showing a cross-sectional structure of the shell of the FRP barrel according to the present invention, the shell of the FRP barrel is largely composed of a primary molding layer 40 and the secondary molding layer 42 Have

The primary forming layer 40 of the shell 10 of the FRP barrel is a glass chop (12), roving (14), glass roving cloth (glass roving cloth) 16) are laminated and molded, and in particular, the laminated widths of the stacked primary molding layers 40 are molded to overlap each other by half.

More specifically, the width of the primary molded layer 40 in which the glass chop 12, the roving 14, and the glass roving cloth 16 are laminated in this order is It is 300mm and has a structure formed by overlapping one by one as if the bandage is wound at an oblique angle.

In addition, the thickness of each material constituting the primary molded layer 40, the thickness of the glass fin 12 is laminated 2mm, the combined thickness of the roving 14 and the glass roving cross 16 is 0.5mm, As the width overlaps by 1/2, a total thickness of 5 mm is achieved.

On the other hand, the secondary molded layer 42 is laminated on the surface of the primary molded layer 40, the structure of the secondary molded layer 42 will be described as follows.

The glass chops 12, the roving 14, and the glass chopped strand mat 18 are sequentially stacked on the surface of the glass roving cross 16 that forms the outermost portion of the primary shaping layer 40, and at the same time, the stacked width. The secondary shaping layer 42 is formed by overlapping by 1/2. The overall width of the secondary shaping layer 42 is 300 mm, and the entire width of 300 mm maintains the same width in the circumferential direction. The stacked thickness of the glass chops (12) is 2mm, the combined thickness of the roving 14 and the glass chopped strand mat (18) is laminated to 1mm, respectively. 6 mm.

Therefore, the overall thickness of the FRP shell of the present invention, which is composed of a 5 mm-thick primary molded layer 40 and a 6 mm-thick secondary molded layer 42, becomes 11 mm.

Here, the above-described materials and shapes will be described, wherein the roving 14 is a strand of alkali-free glass, which is connected by applying a connection material to a filament of glass and is free from twisting. After being pulled together with the yarn, it is wound into a cylindrical shape and has a thickness of about 310 to 9600 tex (TEX: expressed in weight per 1000m as a unit of fiber thickness).

In addition, the glass chopped strand mat 18 is formed by cutting a strand of an alkali-free glass about 50 mm and stacking it in a uniform thickness without a certain direction and forming a mat shape using a binder.

Herein with reference to Figure 2 attached to a method for producing a shell of the FRP container according to the present invention as follows.

As shown in the accompanying FIG. 2, as a manufacturing apparatus used for the manufacturing method of FRP shell, a mandrel 20 is rotatably provided by a drive means (not shown), Roller 24 on which glass chopped strand mat 18 is wound to one side, roller 24 on which glass roving cross 16 is wound, and conveying path means 28 of glass blasting apparatus 26 and roving 14, etc. It is fixed to this mounting member 30.

In addition, a pressing roller 22 which is held in close contact with and rotates on one surface of the mandrel 20 is provided.

In addition, a means in which a plurality of yarns made by weaving the rovings 14 are stacked, and a control panel of the FLP manufacturing apparatus is provided within a predetermined distance from the mounting member 30.

Herein, a method of manufacturing a shell of an FLP container using the FLP manufacturing apparatus will be described.

First, when the mandrel 20 is rotated at a constant speed by a driving means (not shown), the glass shock 12, the roving 14, and the glass face the surface of the mandrel 20. The process in which the roving cross 16 is supplied at different positions is performed.

Next, the glass chop 12, the roving 14, and the glass roving cross 16 sequentially supplied to the surface of the mandrel 20 are wound on a rotating mandrel 20. The glass shavings 12 are sprayed onto the surface of the mandrel 20 by a glass shaping injector 26, and a plurality of siles made by weaving the rovings 14 upwardly are formed from the roving 14 by means of stacking. The glass roving cross 16 is supplied from the roller 24 on which the glass roving cross 16 is wound up and wound around the mandrel 20, and is wound on the mandrel 20.

The glass shock 12, the roving 14 and the glass roving cross 16 are sequentially supplied at different positions, and are thus wound and stacked in the order in which they are supplied. In this case, the mandrel 20 The glass shocks 12, the roving 14 and the glass roving cross 16 supplied to the surface of the winder are wound once on the mandrel 20 and at the same time cover the half of the wound width and wind up again. Wrap bandages at an oblique angle so that they are half-width overlapped.

Therefore, after finishing the above process, the primary molded layer 40 as shown in FIG. 1 is molded.

Next, at the same time as the process of forming the primary shaping layer 40 is finished, the glass chops 12, the roving 14, and the glass chopped strand mat 18 are placed on the surfaces of the primary shaping layer at different positions. The supply process proceeds.

Next, the glass chops 12, the roving 14, and the glass chopped strand mat 18 are sequentially supplied to the surface of the primary shaping layer 40 so as to be stacked so that the widths are 1/2 of each other. By molding so as to overlap each other, the process of shaping | molding the secondary shaping | molding layer 42 advances.

That is, the glass shap 12 is sprayed on the surface of the glass roving cross 16 which forms the outermost part of the primary shaping layer 40 by the glass shaver injector 26, and the roving 14 at the upper position thereof. Glass yarns from rollers 24 which are fed with rovings 14, wound on the mandrel 20, and wound on top of the glass chopped strand mats 18, from which a plurality of yarns made by weaving The strand mat 18 is fed and wound around the mandrel.

More specifically, the glass chops 12, the roving 14, and the glass chopped strand mat 18, which are sequentially supplied to the surface of the primary shaping layer 40, are supplied in sequence, and the width thereof is equal to each other. By repeatedly winding in a 360 ° rotational direction to overlap each other, the secondary molded layer 42 is formed.

In particular, the secondary shaping layer 42 is alternately wound in the opposite direction in which the primary shaping layer 40 is wound, as shown in FIG. 1.

On the other hand, when the primary molding layer 40 and the secondary molding layer 42 is wound on the mandrel 20, the pressing roller is rotatably supported on one side surface of the mandrel 20 ( 22) is pressed and molded to maintain a uniform thickness surface.

Accordingly, the FRP shell manufactured by the above method has a structure as shown in FIG. 1.

As described above, according to the shell structure of the FLP container according to the present invention, glass chop, roving, glass roving cloth to solve the disadvantages of the conventional FLP container. It has a high strength and high productivity by providing a shell structure of a thin AlF barrel formed by lamination of a first layer and a glass chopped, roving, and glass chopped strand mat by a second lamination. It is possible to have an advantage of less peeling phenomenon.

Claims (3)

The primary glass chop (12), roving (14), glass roving cloth (16) laminated in order from the inner side and formed to overlap the width of each other by 1/2 Forming layer 40; A glass chopped strand mat 18 of glass chopped strands 12, rovings 14, and glass chopped strand mats 18 are sequentially disposed on the surface of the glass roving cross 16 of the primary shaping layer 40. A shell structure of an F-ALP barrel characterized by a structure consisting of a secondary molding layer 42 laminated and molded so that its width overlaps. The total thickness of the shell 10 of the FRP barrel is 11 mm, and the primary shaping layer 40 has a thickness of 2 mm, a roving 14 and a glass roving cross, respectively. 16) have a laminated thickness of 0.5 mm as the combined thickness of 0.5 mm and the widths overlap each other by 1/2, and each of the secondary molded layers 42 has a thickness of 2 mm, The shell structure of the F-ALP barrel, characterized in that the combined thickness of the roving 14 and the glass chopped strand mat 16 is laminated to 1 mm, and the laminated width is overlapped by 1/2 to have a total thickness of 6 mm. . 3. The shell structure of FLP container according to claim 1 or 2, wherein the primary molded layer (40) and the secondary molded layer (42) are formed by staggering the stacked widths in different directions.