JPH0834066A - Continuous pultrusion equipment - Google Patents

Abstract

PURPOSE:To longitudinally wind a reinforcing material aggregate around a cylindrical mandrel without disturbining the reinforcing material structure of the sheet like reinforcing material aggregate formed in a previous process by providing a shaping guide and a forming guide to pre-shape the sheet like reinforcing material aggregate into an almost cylindrical shape. CONSTITUTION:The outside aggregate 84 issued from a reinforcing material accumulation device 22 is passed through two stages of arranging guides 46A, 46B to be guided to a forming guide 52. Subsequently, the outside aggregate guided to the forming guide 52 is longitudinally wound around an inside reinforcing material layer 86 formed into a cylindrical shape while formed into a preparatory curved shape before transferred to a cylindrical shape from a sheet form to be shaped into a cylindrical outside reinforcing material layer 88 having a seam in its longitudinal direction. Further, both reinforcing material layers are passed through a hoop winding apparatus 54 and several rovings are laterally wound around the outer periphery of the outside reinforcing material layer 88 to prevent the outside reinforcing material layer 88 from getting loose to integrate the same and a cylindrical laminate 90 is formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding apparatus for continuously pultruding an FRP hollow body, and more specifically, for continuously isotropically molding an FRP hollow body having a high mechanical strength. The present invention relates to an economical continuous pultrusion molding apparatus having a low equipment cost and a low operating cost. It should be noted that the hollow body is a long tubular molded body, and regardless of the shape of the cylinder, a hollow cylindrical hollow body such as a circular cylinder or an elliptic cylinder, and a polygonal cylinder including a triangular cylindrical hollow body. Means a hollow body.

[0002]

2. Description of the Related Art Conventionally, such FRP hollow bodies have been formed mainly by a hand layup method or a filament winding (FW) method. The hand lay-up method uses a simple device such as a brush, spatula, or roller to stack glass fibers on the mold with the hands of a person while stacking the resin to the required thickness in sequence, and under appropriate temperature control. In this method, a resin is cured and the cured product is removed from the mold to obtain a molded product. On the other hand, in the FW method, dozens of rovings are aligned and wound regularly on a rotating mandrel (mold) while being impregnated with a resin composition (hereinafter referred to as matrix), and after reaching a predetermined thickness, curing Then, the mold is released from the mold and molded.

However, the hand lay-up method is an extremely labor-intensive molding method by manual work, and therefore FW
Although the method is mechanized, since it is a batchwise discontinuous molding method composed of two steps, a molding step and a heating step, the steps are complicated and the work efficiency is low.
Therefore, the molding cost increased. Further, since neither the hand layup method nor the FW method is a continuous molding method, it is difficult to ensure the uniformity of the product, and it is not an appropriate method as a method for mass-producing molded products having the same characteristics. In addition, all of them are not popular as a place to work because of poor working environment, and it is actually difficult to collect necessary manpower and mass-produce them. Moreover, in order to mold a long FRP tubular molded body, in view of its molding principle,
It wasn't inherently suitable.

Therefore, as a method of continuously molding a tubular FRP long molded body, a so-called pull-through method, that is, a pultrusion molding method has been attempted. In the conventional pultrusion method, roving is mainly used as a reinforcing material, a large number of rovings are aligned according to the required strength characteristics, and this is impregnated with a matrix, and a mold having the same shape as the cross section of the molded body is formed. It is a method of continuously molding a long molded body by drawing it into the mold and curing it in a mold. Conventionally, F
The continuous pultrusion method for the RP molded body is carried out using an apparatus as shown in FIG. As shown in FIG. 6, in the conventional continuous PRP molding apparatus for FRP molded articles, roving is used as a reinforcing material, and the roving is drawn from the roving krill A and run in the matrix impregnation tank C to impregnate the matrix. Then, it is passed through a forming guide F which is shaped (shaped), and the roving structure is further drawn into a hardening mold (mold) G to be hardened. The hardened compact H is pulled out from the hardening mold G by the drawing device I and cut by the cutter J.

[0005]

However, the conventional pultrusion method has the following problems. First, the first problem is the problem of strength of the molded body produced by the conventional pultrusion method. As shown in Table 1, the conventional molded product by the pultrusion method had lower mechanical strength than the molded product molded by the hand lay-up method or the FW method. That is, the tensile strength in the longitudinal direction and the compressive strength in the 0 ° direction, which are reinforced by roving, are about the same, but the 90 ° compressive strength is low, and cracks occur inside the molded body. There were many cases where they were doing it. The compressive strength is obtained by the method described in Examples below.

[Table 1]

Further, in the conventional drawing method, 90 °
Since the compressive strength in the direction becomes low, when an FRP pultruded product is used as a structural member and processed, spliced or the like, deformation or breakage often occurs.
For example, FRP molded products can be used as substitutes for steel structural members such as angles, I-beams, and H-shaped steels used in the field of civil engineering and construction, but tighten joints of FRP molded products with bolts and nuts. In this case, the FRP molded product is required to have a large strength in the thickness direction, and if the strength in the thickness direction is small, the FRP molded product is compressed and broken at the place where the bolt and the nut are tightened. In addition, 0 for FRP molded products
If there is a significant difference in the strength between the ° and 90 ° directions, FR
The P-molded product tears in the direction of pulling out the reinforcing material from the broken portion as shown in FIG.

Therefore, when the FRP molded product is used as a substitute for the steel structural member, the compressive strength in the thickness direction must be high, the bending strength and the tensile strength in the 0 ° direction and 90 ° are high, and Bending and tensile strengths in 0 ° direction and 9
The difference between the values in the 0 ° direction must be small. Second
As a problem of the above, the molded product formed by the conventional pull-through method has a fluffy surface and is poor in surface smoothness. Therefore, it is difficult to use it as a structural member as it is, and some kind of surface treatment is required. A third problem is that the conventional continuous pultrusion molding apparatus has a three-dimensional structure in which the roving supply device and the roving impregnation device are arranged at a high place, and the subsequent devices are sequentially arranged at lower places according to the process. Therefore, the equipment cost and the operating cost are increased.

[0008] By the way, FRP molded products are excellent in corrosion resistance, lightweight and relatively high in mechanical strength, that is, they have a large specific strength, so that they are widely used, and in recent years, they have been used for pillars, struts, piers, booms, etc. It has come to be used in large quantities as a structural member for various structures. Therefore, there has been a demand for development of a continuous pultrusion molding apparatus capable of economically producing a large number of FRP long tubular moldings having high isotropic strength which can be used as structural members.

In view of the above demands, an object of the present invention is to economically form a long hollow FRP hollow body having a high isotropic mechanical strength which can be used as a structural member continuously by a drawing method. An object is to provide a continuous pultrusion apparatus.

[0010]

DISCLOSURE OF THE INVENTION In developing a continuous pultrusion molding apparatus which meets the above-mentioned object, the present inventors have researched conventional techniques and have published related patents and utility model publications to date. Was investigated in detail. The following is a summary of the disclosure contents of the patent publications that are particularly relevant. 1. Japanese Unexamined Patent Publication No. 50-75263 uses a high-frequency heating device for preheating and a heating die for forming and gelling a pultrusion product, and confine fibers and resin in a small area in the preheating device. We have proposed a pultrusion molding device that prevents the preheating device from being contaminated with resin. 2. Japanese Unexamined Patent Publication No. 64-75225 discloses an axial fiber layer formed by arranging reinforcing fibers in an axial direction and a helical fiber layer formed by winding the reinforcing fibers in a spiral shape around an axis. It is said that the strength in the axial direction and the lateral direction is improved as compared with the conventional product by including the above. 3. Japanese Unexamined Patent Publication No. 2-38026 discloses a method of impregnating a sheet-shaped reinforcing fiber base material with a resin, drawing the resin-impregnated superposition material body through a heating die, and molding the resin-impregnated base material. On the side edge, so as to cover the side edge,
By disposing the unidirectional woven fabric so that the warp threads of the unidirectional woven fabric are in the pull-out direction and bonding the unidirectional woven fabric to the base material, the disorder of the arrangement of the reinforcing fibers at the side end portion of the superposed body is prevented. It is said that it will be prevented, mechanical strength will be improved, and variations in product characteristics will be reduced.

4. JP-A-4-108145 discloses that a braid structure sent by a feed roller of a braiding machine is fed into a pull-out molding machine by a feed roller having the same peripheral speed as the peripheral speed of the feed roller, and is slightly lower than the peripheral speed of the feed roller. It is said that the size of the braid structure can be easily controlled by pulling it with a pulling roller having a low peripheral speed. 5. Japanese Patent Application Laid-Open No. 4-163132 discloses that at least one layer of a pair of laminated layers made of mat and cloth and the mat layer are the outermost layers of the mat layer, and the mat layer and the cloth layer are alternately located. It is said that by using a resin-impregnated base material obtained by laminating a resin liquid and then laminating it with an impregnating roller, a fiber-reinforced plastic with excellent anisotropy and mechanical properties and flame retardancy can be produced. .
The base material is composed of a pair of a mat layer and a cloth layer except for the outermost layer. When the cloth is drawn into the resin liquid alone without being laminated with the mat, the liquid adhered to the surface of the cloth is removed by the impregnation roller because the viscosity of the resin liquid is high.
It is said that the mat and the cloth must be laminated and drawn into the resin liquid as a pair of layers because the impregnation property of the cloth becomes very poor. 6. Japanese Unexamined Patent Publication No. 4-270640 discloses a curable resin impregnated into a reinforcing fiber material when a fiber-reinforced synthetic resin molded article is molded by a pultrusion molding method, at least for a reinforcing fiber material having relatively low mechanical strength. Is impregnated with a photocurable resin liquid and a thermosetting resin liquid, and then the reinforcing fiber material is pre-cured by irradiating it with light and then fed into the molding passage to cut, tangle, wrinkle, etc. the fiber. The phenomenon of will be reduced, and troubles at the alignment stage will be eliminated. 7. Japanese Patent Application Laid-Open No. 4-290730 discloses that when a molded body is molded by a pultrusion molding method, a composite is formed by forming a fiber-reinforced synthetic resin layer on a core material layer and an outer layer thereof, and an isotropic (metal , Wood, ceramics, various synthetic resins, etc.), the thermosetting resin is supplied to the surface of the core material while it is being transferred in one direction, and the outside circumference is hardened at another relatively high temperature. By supplying reinforced fibers impregnated with a hydrophilic resin and drawing it to form a fiber reinforced synthetic resin layer, the adhesion between the core material and the fiber reinforced synthetic resin layer is improved, and the drawing direction and It is said that the difference in intensity from the perpendicular direction will be small. 8. Japanese Unexamined Patent Publication No. 4-301435 discloses an attempt to form a molded body with a composite formed by forming a core layer and a fiber-reinforced synthetic resin layer on the outer layer when the molded body is formed by a pultrusion method. While transferring metal, wood, ceramics, various synthetic resins, etc. in one direction, apply thermosetting resin on the surface and heat the applied surface through a release film to cure it. By supplying the reinforcing fiber impregnated with another thermosetting resin that cures at a relatively high temperature to the surrounding area and drawing it, the adhesion between the core material and the fiber reinforced synthetic resin layer is improved, and the drawing direction and It is said that the difference in the intensity with respect to the right angle becomes smaller.

[0012] However, since Japanese Patent Laid-Open No. 4-163132 uses a laminated body of a pair of mat and cloth, there are many restrictions on the material, and Japanese Patent Laid-Open No. 4-290730 and Japanese Patent Laid-Open No. 4-301435 disclose. , The core material is used to eliminate the anisotropy, so it seems to be restricted in the application.
It cannot be evaluated that the other publications mentioned above can be expected to have a great effect in eliminating the anisotropy which is the object of the present invention.

In order to develop a continuous pultrusion molding apparatus suitable for the purpose of the present invention which is different from the above-mentioned prior art, the inventors of the present invention have conducted experiments and research and have obtained the following findings. First, in order to strengthen a long FRP tubular molded body isotropically, reinforcing fiber is isotropically coordinated as a reinforcing material in addition to roving that contributes to longitudinal strength. And
It is necessary to use mats with increased strength both longitudinally and transversely, for example chopped strand mats or roving cloths. Further, it is necessary to increase the content of the reinforcing material in order to prevent the generation of internal cracks, and further it is necessary to reduce the resin content of the surface in order to impart smoothness to the surface of the molded body.

Secondly, in order to form the above-mentioned isotropic reinforcing material layer, first, a roving row in which rovings are arranged in parallel is interposed between mats to form a sheet-like reinforcing material aggregate. Then, it must be wrapped longitudinally around the mandrel to form the reinforcement laminate.

Third, to solve the problem in forming the reinforcing material laminate by winding the reinforcing material vertically along the mandrel. The problem is that when forming both sides of the aggregate at one place in the longitudinal direction to form a tubular shape, it is technically necessary to suddenly wind the sheet-shaped reinforcing material aggregate around the mandrel and form the tubular shape. It is difficult to say.
In order to form a large-sized molded product member, a sheet-shaped reinforcing material aggregate having a relatively large thickness is required, but when such a thick sheet-shaped reinforcing material aggregate is wound around the mandrel, wrinkles are generated. It has been particularly difficult to obtain a desired shape by deforming or unevenly arranging without forming a tubular shape.

Conventionally, in molding such a large-sized molded article member, most of the reinforcing materials are rovings,
The sheet-shaped reinforcing material aggregate was not wrapped around the mandrel. Further, even when a relatively large amount of mat is used, one sheet-shaped reinforcing material aggregate is not formed, but it is divided into two or more thin strip-shaped bodies and they are aligned in the longitudinal direction with a mandrel. For example, a sheet-shaped reinforcing material aggregate having a width of about 1/4 of the width of a molded product is vertically attached to the mandrel from the left, right, up, and down directions of the mandrel. The roving was wound so as to be substantially perpendicular to the longitudinal direction of the. However, in such a conventional method, there are four seams of the reinforcing material in the molded product, so that the mechanical strength is lowered.

Therefore, the present inventor has not disturbed the reinforcing material structure of the sheet-shaped reinforcing material assembly formed in the previous step,
A shaping guide, also known as a forming guide (hereinafter referred to as a forming guide), is provided so that the reinforcing material aggregate can be vertically wound around a cylindrical mandrel, whereby the sheet-shaped reinforcing material aggregate is formed into a substantially cylindrical shape. This problem was solved by pre-shaping.

Next, in order to reduce the equipment cost and the operating cost, it is decided to arrange the molding apparatus, which is conventionally arranged three-dimensionally in the vertical direction, in the horizontal horizontal direction.

In order to achieve the above object, based on the above findings, the continuous pultrusion molding apparatus for FRP hollow bodies according to the present invention is an apparatus for molding a FRP hollow body by a continuous pultrusion molding method, Pull out multiple rovings,
A roving row forming device configured to form roving rows by aligning them in parallel in one stage, and an impregnating roving row is formed by impregnating the roving row with a resin composition (matrix) containing a thermosetting resin as a main component. A roving impregnating device, a mat layer forming device that draws out one mat or draws out and stacks a plurality of mats of the same type or different types to form a mat layer, and impregnates the mat layer with the resin composition. A mat impregnating device for forming an impregnated mat, and a reinforcing material stacking device for forming a sheet-shaped reinforcing material stack by interposing an impregnating roving row between the impregnated mats,
A mandrel having an outer surface having the same shape as the contour of the hollow portion of the hollow body, a mandrel device including a supporting portion of the mandrel, and a cylinder having a seam in the longitudinal direction wound around the mandrel vertically along the reinforcing material aggregate. Performing hoop winding while shaping into a shape, and then wrapping the reinforcing material aggregate of the next layer vertically on the outside of the sequentially shaped reinforcing material aggregate, and forming into a tubular shape having a seam in the longitudinal direction. While stacking,
Further, a hoop winding is further performed thereon, and a laminated body forming device for forming a tubular reinforcing material laminate in the same manner, a molding die having a hollow portion having the same contour as the outer shape of the hollow body in the longitudinal direction, and heating means. A FRP hollow body is continuously molded by including a molding die device having a and a drawing device for drawing the molded hollow body from the molding die device.

In a preferred embodiment of the present invention, a reinforcing guide having a curved surface necessary for smoothly transferring a sheet-shaped reinforcing material stack to a cylindrical shape having a seam in the longitudinal direction is provided in advance. It is characterized in that it is formed into a cylindrical shape from a sheet shape and is wound around a cylindrical mandrel vertically.

In the continuous pultrusion molding apparatus of the present invention, a FRP hollow body having an arbitrary outer shape and hollow portion contour can be molded by appropriately selecting the shapes of the mandrel and the mold. For example, it is possible to mold a cylindrical hollow body, a polygonal hollow body having a circular hollow portion contour and a polygonal outer shape, or a polygonal hollow body having a similar outer shape and hollow portion contour. The resin composition used in the method of the present invention ((matrix), hereinafter referred to as matrix) is any FRP selected from thermosetting resins such as vinyl ester resin, unsaturated polyester resin, epoxy resin, phenol resin and silicone resin. It is possible to use a molding resin to which auxiliary materials such as a filler, a curing agent, a release agent, a low shrinkage material, a viscosity reducing agent, a defoaming agent, and a curing retarder are appropriately added.

The reinforcing material used in the present invention is a fiber reinforcing material and means roving, mat, roving cloth or the like. The roving used in the present invention is obtained by aligning the strands in which monofilaments are bundled so as to have an arbitrary count, or by directly concentrating and aligning the filaments. Roving mainly contributes to improvement of bending strength and tensile strength and ease of molding. As rovings, those with a weight of 2000-5000 g / km, especially 40
It is preferably from 00 to 5000 g / km. The number of fibers of roving is preferably 2000 to 4000. The roving layer is used without overlapping two or more layers.
The roving layer is formed by arranging rovings in parallel. For example, in the case of roving of 2200 Tex (2200 g / km), the interval is 2 to 4 mm and 4400 Tex (4
For roving of 400 g / km), it means one layer arranged in parallel at intervals of 6 to 8 mm.

The mats used in the present invention include chopped strand mats and continuous strand mats. The chopped strand mat is obtained by dispersing strands cut into a predetermined length in a random direction, laminating the strands to a uniform thickness, and molding the mat into a mat with a binder. As a chopped strand mat, the weight is 3
Those having an amount of from 00 to 700 g / m ² , especially from 600 to 700 g / m ² can be preferably used. The continuous strand mat is formed by stacking the strands in a loop shape to a uniform thickness without cutting the strands, and forming the mat shape with a binder. As a continuous strand mat, the weight is 300 to 700 g / m ² , especially 600 to 700.
Those having g / m ² can be preferably used.

The cloth used in the present invention includes a roving cloth and a blind cloth. As the roving cloth, a plain weave, a twill weave, or the like woven from rovings of a predetermined count (Tex) can be used. The weight of the roving cloth is
400 to 800 / m ^2, it is preferred that particularly 600~800g / m ^2. The suede cloth is a reinforcing material in which yarns, rovings, etc. arranged in parallel are connected by organic fibers, and is mainly used to strengthen the strength in the direction perpendicular to the drawing direction. As a suede cloth, the weight is 5
It is preferably from 0 to 400 g / m ² , especially from 200 to 400 g / m ² .

In general, when the shape and thickness of the molded product are large, it is extremely difficult to pull out by using only the mat and the cloth. For example, the outermost layer is the mat and the inner side is the roving layer, and the inner side of the outermost layer is the mat. When the mat or cloth of the intermediate layer is pulled out while being sandwiched between the roving layer or the roving layer interposed in the intermediate layer, the molding becomes easy. When only mat and cloth are used for the intermediate layer, the volume ratio of mat: cloth is 20:80 to 80-20.
Can be set, and particularly preferably set to 40:60 to 60:40. When the mat is less than 20/100, the resin impregnating property is deteriorated. When the mat is more than 80/100, the moldability is deteriorated and voids are easily generated in the molded product.

When the thickness of the molded product is large and it is difficult to mold only the mat and the cloth, it is possible to further sandwich the roving layer between the cloth and the cloth, the cloth and the mat, or the mat and the mat. The ratio is 5:95 to 95: in volume ratio of [cloth + mat]: roving.
It is preferable that it is 5, especially 80:20 to 95: 5.
When the roving is more than 95/100, cracks are likely to occur in the drawing direction, the bending strength and tensile strength in the drawing direction become extremely large, and the bending strength and tensile strength in the direction perpendicular to the drawing direction become small. If the roving is less than 5/100, the effect for obtaining the ease of withdrawal is almost lost.

In the present invention, aramid fibers are used as the reinforcing material for forming rovings, mats, cloths, etc.
Any material such as carbon fiber or glass fiber can be used, and there is no limitation on the roving count, the weight of mat, cloth or blind cloth.

As the mat used for the outermost layer and the intermediate layer in the present invention, in addition to the usual chopped strand mat and continuous strand mat, a mat-like reinforcing material formed by preliminarily stacking several layers thereof (for example, "BTI mat" made by Brunswick Technology Inc.
Etc.) can also be used.

In the device of the present invention, the circumferential positions of the longitudinal seams of the laminated sheet-shaped reinforcing material stacks are displaced from each other, so that the reinforcing material stacks can be easily inserted into the mold. As a result, uneven thickness in the molded product is suppressed, the strength in the circumferential direction becomes uniform, and the resistance of the molded body to buckling increases. Further, the number of layers of the reinforcing material aggregate to be laminated to form the reinforcing material laminate can be arbitrarily set according to the mechanical strength required for the molded body. As a result, the compressive strength in the 90 ° direction can be increased. Further, it is desirable to provide a device for depositing only the dry mat or both the dry mat and the plastic non-woven fabric on the tubular reinforcing material laminate. This facilitates insertion into the mold, absorbs excess matrix,
The appearance of the molded product is improved.

The mat layer formed in the present invention is not limited in the number of mats regardless of the kind of mat, the same kind or different kinds. The structure of the reinforcing material is practically determined by preparing a test piece in advance so as to have a required mechanical strength in combination with the mat layer and the roving row.

[0031]

According to the invention of claim 1, a roving row forming device,
Equipped with a roving impregnation device, a mat layer forming device, a mat impregnation device, and a reinforcing material collecting device for forming a reinforcing material stack, an impregnating roving row is interposed between the impregnated mats, and a multilayer reinforcing material laminated structure is formed. By doing so, it is possible to realize a large-sized reinforcing material structure having an isotropic expansion and to form a large hollow body which has not been heretofore and which has isotropic mechanical strength. Further, in the apparatus of the present invention, it is possible to continuously perform the pultrusion molding by transferring the work piece from one step to the next step continuously.

According to the second aspect of the present invention, the shaping guide shapes the reinforcing material stack from a sheet shape into a tubular shape in advance, and the reinforcing material stack can be easily shaped into a tubular mandrel without causing deformation or uneven thickness. Can be wrapped vertically.

[0033]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in more detail with reference to the accompanying drawings. FIG. 1 shows the FR according to the present invention.
FIG. 2 is a schematic side view showing an embodiment of a continuous pultrusion apparatus for P hollow body, and FIG. 2 shows a planar arrangement of the molding apparatus shown in FIG. It is explanatory drawing explaining the flow of the process of pulling out a body. The continuous pultrusion molding apparatus 10 shown in FIGS.
(Simply referred to as a molding device) is a FR as shown in FIG.
This is an apparatus for continuously forming the P-shaped rectangular hollow body 94 by drawing. The rectangular tubular hollow body 94 has a rectangular tubular shape with a rectangular cross section orthogonal to the longitudinal direction, and has a hollow portion 96 in the longitudinal direction.
It has. The reinforcing material laminated body forming the side wall 98 of the rectangular tubular hollow body 94 includes an inner reinforcing material layer 86 and an outer reinforcing material layer 88.
It is formed in two stages. The inner reinforcing material layer 86 and the outer reinforcing material layer 88 in the figure are shown virtually, and are actually integrally formed. The rectangular tubular hollow body 94 shown in FIG. 3 is an example of a FRP hollow body that can be molded by the continuous pultrusion molding apparatus according to the present invention, and can be formed into an arbitrary outer shape by changing the shapes of the mandrel and the mold. It is possible to mold a hollow body having the contour of a hollow portion, for example, a polygonal hollow body including a cylindrical hollow body and a triangular hollow body.

The molding device 10 includes a mandrel device 12, a mat layer forming device 14, a roving row forming device 16, a mat impregnating device 18, a roving impregnating device 20, a reinforcing material accumulating device 22, a laminate forming device 24, and a dry mat stand 2.
6, a molding die device 28 and a drawing device 30.

The mandrel device 12 includes a mandrel 32.
And a mandrel support portion 34 that supports the mandrel 32. The mandrel 32 is composed of a mandrel base end portion 32A, a cylindrical mandrel portion 32B, a square mandrel portion 32C, and a transition mandrel portion 32D therebetween, which are integrally formed in the longitudinal direction. . The cylindrical mandrel portion 32B has a cylindrical outer cross-section, and the rectangular mandrel 32C has the same rectangular outer cross-section as the cross-sectional contour of the hollow portion 96 (see FIG. 4) of the rectangular tubular hollow body 94. The transition mandrel section 32D is
An external cross section suitable for transitioning from the cylindrical cross section of the cylindrical mandrel portion 32B to the rectangular cross section of the rectangular mandrel 32C is continuously provided along the longitudinal direction thereof. The main portion of the square mandrel portion 32C (indicated by a dotted line) is located inside the hollow portion of the die 56 of the molding die device 28 described later.

In order to further enhance the effect of winding the roving by the hoop winding, the circumferential length of the cross section of the cylindrical mandrel portion 32B which is the introduction portion is 3 to 7 more than the circumferential length of the cross section of the rectangular mandrel 32C which is the forming portion. % Shorter. As a result, the roving wound around the introduction portion 32B is slightly pulled in the circumferential direction by the molding portion 32C, and the reinforcing material laminate below the roving can be brought into close contact with the molding portion 32C to form an accurate shape. Transition mandrel section 32
D changes from the circular cross section of the introduction portion toward the formation portion 32C from the introduction portion 32B to the cross-sectional shape of the formation portion, and the circumferential length of the cross section is slightly increased.

The mandrel 32 is supported at its base end portion 32A by a mandrel support portion 34 in a cantilever manner. The mandrel support portion 34 is provided with adjusting means for displacing the mandrel 32 from the reference plane and the reference azimuth by using, for example, a jack bolt or a wedge so that the horizontal and azimuth of the mandrel 32 can be adjusted. Accordingly, the positional relationship between the square mandrel portion 32C located in the hollow portion of the die 56 and the die 56 is adjusted, and the die 56 and the square mandrel portion 3 are adjusted.
The void formed in cooperation with 2C can have a predetermined shape and size.

As shown in FIG. 1, the mat layer forming device 14 is composed of a mat rack 38 provided substantially on the rear extension of the mandrel 32 and a mat aligning device 40 for aligning the mat drawn from the mat rack 38. ing. The mat rack 38 is composed of two mat racks 38A and 38B having the same structure, and accommodates a large number of rolls 36A and B around which mats are wound. The roll 36 is rotatably held horizontally and rotates as the wound mat is pulled out. The mat aligning device 40 is a device for aligning the drawn mats, and for example, a rotatable roll equal to the number of layers of the drawn mats is horizontally provided.
Moreover, the position of the roll can be adjusted to give tension to the mat. The mat aligning device 40 draws the mats into alignment and pulls them into the next device with appropriate tension.

On both sides of the mat layer forming device 14, two sets of roving row forming devices 16A and 16B having the same structure are arranged. The roving row forming devices 16A and 16B include roving racks 42A and 42B, which house a large number of krills 40 around which rovings are wound, and a roving aligning device 4, respectively.
4A and 4B having the same structure.
The creel 40 is formed by winding a roving horizontally around a vertical cylindrical hobbin, and is adapted to rotate around a vertical axis when the roving is pulled out. The roving aligning device 44 is a flat plate in which holes having a diameter substantially the same as the diameter of the rovings are arranged in a predetermined array by the number of rovings, and the rovings are drawn out from each krill 40 through the holes and friction with the holes. Maintains moderate tension.

A mat impregnating device 18 is provided following the mat layer forming device 14. The mat impregnating device 18 includes a resin composition ((matrix)) on a mat that travels in a sheet shape.
(Hereinafter, referred to as matrix) in an impregnation device of a type in which the matrix is made to flow down, as a method of flowing the matrix down from the top of the mat through a slit of the matrix supply pipe in a film form, or at an appropriate interval to the matrix supply pipe. It is made to flow down in a droplet form or a spray form from the nozzle arranged by. Further, it is desirable to provide means for controlling the amount of flow-down so that the amount of matrix in the mat layer is not excessive. This makes it possible to increase the content of the fiber reinforcing material in the molded rectangular tubular hollow body and improve the mechanical strength.

Subsequent to the roving aligning device 44, roving impregnating devices 20A and 20B are provided in each of the two series of roving row forming devices 16A and 16B. The roving impregnation apparatus 20 includes a resin tank for accommodating a matrix to be impregnated in the roving and running the roving so as to be immersed in the accommodated matrix, and a means for squeezing the excessively impregnated matrix from the roving. The resin tank is provided with a horizontally provided guide rod in order to guide the traveling of the roving and to give an appropriate tension to the roving. The matrix is constantly supplied from the resin tank so as to maintain the liquid level, and the overflowed matrix is returned to the resin tank again.

The means for squeezing out the excess matrix is, for example, arranged with a squeezing plate having through-holes having the same diameter as the roving and provided by the number of rovings, and squeezing the excess matrix through the rovings. Alternatively, two rotatable rolls may be arranged to face each other, and roving may be provided therebetween to squeeze out excess matrix. By removing the excess matrix, the glass content in the molded rectangular tubular hollow body can be increased to improve the mechanical strength.

The reinforcing material collecting device 22 is the mat impregnating device 1.
8 is arranged in front of the mat impregnating device 18, and the roving rows drawn from the roving impregnating device 20 are interposed between the mat layers drawn from the mat impregnating device 18. Form the required number of each body separately. In this embodiment, the number of the reinforcing material aggregates is the inner reinforcing material aggregate (hereinafter simply referred to as the inner aggregate) 8 corresponding to the inner reinforcing material layer 86 shown in FIG.
2 and an outer reinforcing material aggregate (hereinafter simply referred to as an outer aggregate) 84 corresponding to the outer reinforcing material layer 88.
The reinforcing material accumulating device 22 is composed of the same number of rolls as the mat layer, and a plate-shaped array plate in which through holes having substantially the same diameter as the roving are arranged in a horizontal row at a predetermined interval. The rolls and the array plate are sequentially arranged one above the other according to the predetermined integrated structure. In the reinforcing material stacking device 22 used in this embodiment, a laminated structure including the roll and the array plate is formed in two stages to form the inner stack 82 and the outer stack 84, respectively.

The laminated body forming device 24 is the reinforcing material collecting device 2.
2, which is located in front of the reinforcing material collecting device 22, is wound around the mandrel vertically along the longitudinal direction to form a tubular shape having a seam in the longitudinal direction, and is subjected to hoop winding. The reinforcing material aggregate of the next layer is wound vertically along the outer side of the shaped reinforcing material aggregate, laminated while forming into a tubular shape having a seam in the longitudinal direction, and further, hoop winding is performed on it, and so on. And is a device for forming a cylindrical reinforcement laminate (hereinafter simply referred to as a cylindrical laminate). The stack forming device 24 includes a two-stage alignment guide 46A, B installed below the mandrel device 12, a cylindrical transfer guide (hereinafter referred to as a forming guide) 48 for the inner stack, and a hoop winding device 50. It is composed of a cylindrical transition guide (hereinafter referred to as a forming guide) 52 for the outer aggregate and a hoop winding device 54.

The alignment guides 46A and 46B are used for the inner stack 82 and the outer stack 8 pulled out from the reinforcing material stacking device 22.
It is a device for guiding 4 to the forming guides 48, 52 while further aligning them, and has substantially the same configuration as the reinforcing material accumulating device 22. Forming guides 48 and 52
Has a curved surface necessary to smoothly transfer the sheet-like long flat inner and outer stacks 82 and 84 into a cylindrical shape having a joint in the longitudinal direction, and is pulled by a pulling device 30 described later. It is a guiding means that guides the inner and outer gathered bodies 82 and 84, which are in tension, while preliminarily shaping them into a substantially cylindrical shape, and winds them around the mandrel 32 along the vertical direction.

Hoop winding device 50 for the inner stack and hoop winding device 54 for the outer stack.
Are provided in front of the forming guides 48 and 52, respectively, and are composed of the inner reinforcing material layer 86 and the inner reinforcing material layer 86 which are the inner aggregates 82 wound around the mandrel 32.
A roving is horizontally wound on the outer reinforcing material layer 88 formed of the outer accumulated body 84 wound on the upper surface of the outer reinforcing material layer 84 so as to be integrated so that the reinforcing material does not disperse and form a cylindrical laminated body which is easily inserted into the mold 56. Hoop winding device 50 and 5
4 contains the required number of krills wound roving,
A guide for guiding the roving drawn out from each krill to the sideways winding is provided, and the roving can be smoothly wound sideways.

When the forming guides 48 and 52 are attached so that the attachment angles are different from each other to form a cylindrical laminate, the longitudinal seam 98 of the inner reinforcing material layer 86 is formed.
(See FIG. 3) and the longitudinal seam 99 of the outer reinforcement layer 88.
(See FIG. 3) so that the position in the circumferential direction is different. By making the circumferential positions of the longitudinal reinforcing seams of the inner reinforcing material layer 86 and the outer reinforcing material layer 88 different from each other, the occurrence of uneven thickness in the molded product is suppressed, and the strength in the circumferential direction is made uniform and the molded body is formed. The resistance to buckling of is increased.

Further, dry mat frames 26 are provided on both sides of the mandrel 32 between them and the mold unit 28. The dry mat frame 26 is a device for supplying a dry mat to cover the outer side of the outer reinforcing material layer 88 with the dry mat. The dry mat frame 26 guides the mat-containing roll and the drawn mat along a predetermined path to smoothly strengthen the outer side. The guide is attached to the material layer 88.

The mold device 28 is configured such that the mold 56 and the mold 56 are fastened from above and below to maintain the integrity, and the drawing device 3 is used.
It is composed of a support body that supports the mold 56 against the pulling force of 0, that is, a platen 58. Mold 56
Is a mold in which a curing mold and a post-curing furnace are integrally configured in order to mold while hardening the matrix in the reinforcing material laminate molded from the cylindrical shape to the rectangular tube shape by the mandrel 32. It is composed of an upper die having an upward concave quadrangular recess and a lower die having an downward downward quadrangular recess. When the upper and lower molds are combined, the mold 56 is
A hollow portion extending in the longitudinal direction is formed, and the cross-sectional contour of the hollow portion has the same shape as the outer shape of the longitudinal cross section of the rectangular tubular hollow body 94, and the hollow mandrel portion 32C of the mandrel 32 is provided in the hollow portion. Are arranged, and in cooperation therewith, a void having the same contour as the cross-sectional shape of the rectangular tubular hollow body 94 is formed.

The mold 56 may be provided with a heating element inside so as to supply heat necessary for curing the resin. Further, a resin inlet / outlet hole penetrating the mold 56 is provided as necessary, and a matrix is injected near the surface of the molded body before the resin is cured and molded, or a mandrel squeezed out in the mold 56 is discharged. It is also possible to adjust the mandrel content in the tubular laminate, that is, the reinforcing material content. Furthermore,
It is also possible to provide the mold 56 with a jacket and circulate water in the jacket to once cool the resin before heating it. As a result, the tubular laminated body drawn into the mold 56 is once cooled to the reference temperature before being heated, and the mold 5 is cooled.
The heating temperature of 6 can be completely adjusted, and the temperature control of the curing step can be perfected.

The platen 58 is composed of two upper and lower plate-shaped members made of heavy metal, and the resin is hardened by embedding a heating element in the plate-shaped member or by providing a jacket for circulating hot oil. Necessary heat is supplied through the mold 56. Further, the upper and lower two platens maintain the integrity of the mold 56 that is interposed by being firmly fastened to each other by tightening means such as bolts and nuts. The lower platen is firmly fixed to the lower fixing base 60, so that the mold 56 is held at a predetermined position against the pulling force of the drawing device 30.

A pulling device 30 is provided on the extension line of the mandrel 32 in front of the mold device 28 for pulling out the molded rectangular tubular hollow body 94. The pulling device 30 is composed of two pullers, and each puller alternately moves forward and backward toward the mold device 28 in a constant stroke. While one puller retreats while clamping the rectangular tubular hollow body 94 by pulling the rectangular tubular hollow body 94 from the mold 56, the other puller moves forward and stops at a predetermined position. The puller stops to release the clamp of the rectangular tubular hollow body 94, and at the same time, the other puller clamps the rectangular tubular hollow body 94 and starts retreating. During this time, the one puller again starts to move forward. By repeating this, the rectangular tubular hollow body 94 can be pulled out from the mold 56.

In the present molding apparatus, as described above, a guide having not only a guiding function but also a tension control function in the path from one step to the next step, such as a mat aligning device 40, a roving aligning device 44, and an aligning guide 46. Further, by providing the forming guides 48 and 52, and by pulling out the rectangular tubular hollow body 94 from the mold 56 by the pulling device 30,
The roving and the mat are pulled out individually, and the subsequent steps are sequentially performed without providing another puller on the way. This minimizes the number of pullers that pull the work piece, and makes it easier to adjust the degree of tension of the work piece during and between steps.

Next, with reference to FIGS. 1 and 2, a method for molding the rectangular tubular hollow body using the molding apparatus 10 will be described. First, the rovings 70 are drawn out from the krills 40 housed in the roving rack 16 and passed through the roving alignment device 44 to align a predetermined number of rovings 70 in parallel in a row to form a roving row 72.
Next, the roving row 72 is guided to the roving impregnation device 20, and a matrix containing a thermosetting resin as a main component is impregnated to form an impregnated roving row 74. The impregnated roving row 74A formed by pulling out and impregnating the roving 70A from the roving rack 16A shown on the upper side (A side) of the mat rack 14 is as follows.
The outer aggregate 84 is formed by being interposed between the impregnated mats 80A. On the other hand, an impregnated roving row 74B formed by pulling out and impregnating the roving 70B from the roving rack 16B shown below (on the B side) of the mat rack 14
Interpose between the impregnated mats 80B to form the inner aggregate 82.

On the other hand, from the mat roll 36A stored in the mat rack 38A, the mat 76 of a desired type and number of sheets is used.
A is pulled out and passed through the mat alignment device 40A to be superposed to form a mat layer 78A. Then, the mat layer 78
A is introduced into the mat impregnation device 18 and impregnated into the matrix to form an impregnated mat 80A. Then, as described above, in the reinforcing material accumulating device 22, the impregnated roving row 74A formed by being drawn out from the roving rack 16A on the A side is interposed between the impregnated mats 80A and accumulated in a desired reinforcing material structure. , The outer aggregate 84 is formed.

Similarly, from the mat roll 36B housed in the mat rack 38B, the mats 7 of a desired type and number can be obtained.
6B is pulled out, and is passed through the mat alignment device 40B to be superposed to form a mat layer 78B.
8 to form an impregnated mat 80B. In the reinforcing material stacking device 22, the impregnated roving row 74B formed by being pulled out from the B side roving rack 16B is interposed between the impregnated mats 80B to be stacked in a desired reinforcing material structure to form the inner stacked body 82. .

The inner accumulated body 82, which has come out of the reinforcing material accumulating device 22 and is accumulated, is guided through the two-stage alignment guides 46A and 46B to the forming guide 48. Then, it is guided to the forming guide 48, and while being shaped into a preliminary curved surface shape before transitioning from a sheet shape to a cylindrical shape, it is longitudinally wound around the cylindrical mandrel portion 32B, and a cylindrical inner side having a seam in the longitudinal direction is formed. The reinforcing material layer 86 is shaped. Then
The inner reinforcing material layer 86 shaped like a cylinder is passed through the hoop winding device 50, and several rovings are wound around the outer periphery of the inner reinforcing material layer 86 so as to prevent the inner reinforcing material layer 86 from becoming loose and integrated. Turn into.

Similarly, the outer accumulated body 84, which has come out from the reinforcing material accumulating device 22 and is accumulated, is guided to the forming guide 52 by passing through the two-stage alignment guides 46A and 46B. Then, it is guided to the forming guide 52 and wound longitudinally on the inner reinforcing material layer 86 formed into a cylindrical shape while being formed into a preliminary curved surface shape before transitioning from the sheet shape to the cylindrical shape,
It is shaped into a cylindrical outer reinforcement layer 88 with a seam in the longitudinal direction. Further, several rovings are passed through the hoop winding device 54 and horizontally wound around the outer periphery of the outer reinforcing material layer 88 to prevent the outer reinforcing material layer 88 from unraveling and to be integrated to form a cylindrical laminated body 90.

Then, the dry mat 92 is pulled out from the dry mat stand 26 and attached to the outside of the formed cylindrical laminate 90. As a result, the smoothness of the surface of the rectangular tubular hollow body can be improved. Subsequently, the cylindrical laminate 90 is further drawn into the mold 56 along the transition mandrel portion 32D. While being heated and cured in the mold 56, the cylindrical laminated body 90 is molded into a rectangular tubular hollow body 94 having a desired shape by the cooperation of the mold 56 and the rectangular mandrel portion 12C penetrating the mold 56. . The formed rectangular tube-shaped hollow body 94 is pulled by the drawing device 30 to draw the mold 56.
And cut it to the desired length to make the product.

Using the molding apparatus 10 shown in FIGS. 1 and 2 described above, a molded product of a long rectangular tubular hollow body was obtained as an example product. The rectangular tubular hollow body shape of the example product is a rectangular tubular shape having a rectangular cross section orthogonal to the longitudinal direction, and is provided with a hollow portion in the longitudinal direction. As shown in FIG. Has a length W of 200 mm and an outer short side length H of 170 mm
The wall thickness T was 15 mm.

Example product 1 1. Matrix A matrix was prepared by mixing the following components in the following formulation at an air temperature of 21.0 ° C. The viscosity of the prepared matrix was 22.0P. (1) Resin Bisphenol A-based vinyl ester resin "Lipoxy R-802 manufactured by Showa Polymer Co., Ltd.": 80 parts by weight Novolac-based vinyl ester resin "Lipoxy H-6"
30 Showa High Polymer Co., Ltd. ": 20 parts by weight

(2) Curing agent Peroxydicarbonate type low temperature curing agent "Percadox 16 manufactured by Kayaku Akzo": 2 parts by weight Peroxyketal type high temperature curing agent "Trigonox 29B75 manufactured by Kayaku Akzo": 1. 0 parts by weight (3) Mold release agent Stearic acid powder "Nippon Rika": 3.5 parts by weight (4) Filler calcium carbonate "Whiten SB (red) Shiraishi Calcium": 40 parts by weight

2. Reinforcement structure (1) Glass fiber roving 4450 g / km Asahi Fiber Co., Ltd. (2) Glass chopped strand mat 600 g /
m ² Nitto Boseki (3) Glass fiber roving cloth 800 g / m ²
Nitto Boseki 1st layer: chopped strand mat 2nd layer: chopped strand mat 3rd layer: roving 4th layer: roving cloth 5th layer: chopped strand mat 6th layer: roving 7th layer: roving cloth 8th layer : Chopped strand mat 9th layer: roving 10th layer: roving cloth 11th layer: chopped strand mat 12th layer: roving 13th layer: roving cloth 14th layer: chopped strand mat 15th layer: roving 16th layer: roving Cloth 17th layer: Chopped strand mat 18th layer: Roving 19th layer: Roving cloth 20th layer: Chopped strand mat 21st layer: Roving 22nd layer: Roving cloth 23rd layer: Chopped strand mat 24th layer: Ro Bing 25th layer: roving cloth 26 layer: chopped strand mat 27 layer: roving 28 layer: chopped strand mat 29 layer: chopped strand mat

In the above-mentioned reinforcing material laminated structure, the chopped strand mats of the first and second layers act as a dry mat, and the number of rovings is 114 from the third layer to the 17th layer, and the mat and cloth are the same. The inner reinforcing material laminate has a width of 820 mm, and from the 18th layer to the 29th layer, the number of rovings is 106, and the width of the mat and the cloth is 760 mm, which is configured as an outer reinforcing material laminate. . Roving is wound by hoop winding on the outer reinforcement laminate and the inner reinforcement laminate. 3. Molding conditions Drawing force: Max 12t Drawing speed: 15cm / min

4. Test Results of Molded Square Hollow Body The test results of the square hollow body are as shown in Table 2.

[Table 2]

[Test Method] 1. Tensile Strength Test Using an autograph (capacity: 25 t) manufactured by Shimadzu Corporation, a tensile strength test of a flat plate molded product was performed according to JIS K 7054 (tensile test method for glass fiber reinforced plastic). 2. Bending Strength Test Using an autograph (capacity: 25 t) manufactured by Shimadzu Corporation, a bending strength test of a flat plate molded product was performed according to JIS K 7055 (bending test method for glass fiber reinforced plastic). The 0 ° bending strength is the bending strength in the same direction as the roving, and the 90 ° bending strength is the bending strength in the direction perpendicular to the roving.

3. Compressive Strength Test Using an autograph (capacity: 25 t) manufactured by Shimadzu Corporation, a flat plate molded article was subjected to a compressive strength test in accordance with JIS K 7056 (Compression test method for glass fiber reinforced plastic). The compression directions of 0 ° compression strength and 90 ° compression strength are shown in FIGS. 5 (a) and 5 (b), respectively.

[0068]

According to the continuous pultrusion apparatus of claim 1, a roving row forming device, a roving impregnation device,
By providing a mat layer forming device, a mat impregnating device and a reinforcing material collecting device for forming a reinforcing material accumulating body, interposing an impregnating roving row between impregnated mats, and forming a multilayer reinforcing material laminated structure, Realized a large-scale reinforcing material structure with isotropic expansion, and the mechanical strength was strengthened isotropically.
A large hollow body that has never been seen can be molded. In addition, by continuously moving the workpiece from one step to the next,
We have realized a molding machine that can continuously mold FRP hollow bodies. According to the continuous pultrusion molding apparatus according to claim 2, the sheet-shaped reinforcing material aggregate is preliminarily formed into a tubular shape before being provided with a shaping guide and wound around the tubular mandrel, without causing deformation. Also, without uneven thickness
The reinforcing material aggregate can be smoothly wound around the mandrel to form a tubular reinforcing material laminate.

[Brief description of drawings]

FIG. 1 is a schematic side view of an example of a molding apparatus that carries out a pultrusion method for a FRP rectangular tubular hollow body according to the present invention.

2 is a plan layout view of the molding apparatus shown in FIG. 1. FIG.

FIG. 3 is a perspective view of an example of an FRP hollow body molded by a molding device according to the present invention.

FIG. 4 is a cross-sectional view of the rectangular tubular hollow body showing the shape and dimensions of the molded rectangular tubular hollow body.

5 (a) and 5 (b) are explanatory views showing compression directions of 0 ° compression strength and 90 ° compression strength in a compression strength test, respectively.

FIG. 6 is a flowchart showing the steps for explaining a conventional molding method.

FIG. 7 is an explanatory view for explaining a lack of mechanical strength of a molded product molded by a conventional continuous pultrusion molding method.

[Explanation of symbols]

 10 Continuous pultrusion molding device 12 Mandrel device 14 Mat layer forming device 16 Roving row forming device 18 Mat impregnation device 20 Roving impregnation device 22 Reinforcement material accumulating device 24 Laminate forming device 26 Dry mat stand 28 Molding die device 30 Extraction device 32 Mandrel 34 Mandrel Support 36 Roll 38 Matrac 40 40 Mat Aligning Device 42 Roving Rack 44 Roving Aligning Device 46 Alignment Guide 48 Forming Guide for Inner Aggregate 50 Hoop Winding Device for Inner Aggregate 52 Forming Guide for Outer Aggregate 54 Outer Hoop winding device for stack 56 Mold 58 Platen 60 Fixing stand

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display area B29K 105: 08 B29L 23:00

Claims (2)

[Claims] 1. A roving row forming apparatus for forming a FRP hollow body by a continuous pultrusion method, wherein a plurality of rovings are drawn out to form a roving row by aligning them in parallel in one stage. A roving impregnation device that forms an impregnated roving row by impregnating a roving row with a resin composition (matrix) containing a thermosetting resin as a main component, and pulling out one mat or a plurality of mats of the same kind or different kinds. A mat layer forming device for drawing out and stacking the mat layers to form a mat layer; a mat impregnating device for impregnating the mat layer with the resin composition to form an impregnated mat; and an impregnating roving row interposed between the impregnated mats. And a mandrel having an outer surface having the same shape as the contour of the hollow portion of the hollow body. And a mandrel device consisting of a mandrel supporting part, and a reinforcing material aggregate is wound around the mandrel in the longitudinal direction to form a tubular shape having a seam in the longitudinal direction while performing hoop winding, and then sequentially shaped. On the outside of the reinforcing material stack, the reinforcing material stack of the next layer is wound longitudinally and laminated while shaping into a tubular shape having a seam in the longitudinal direction, and further subjected to hoop winding, and the like below, A laminated body forming device for forming a tubular reinforcing material laminate, a forming die device having a forming die having a hollow portion having the same contour as the outer shape of the hollow body in the longitudinal direction, and a heating means, and a formed hollow A continuous pultrusion molding apparatus, comprising: a pultrusion device that pulls out a body from a molding die device to continuously mold a hollow body made of FRP. 2. The reinforcing material aggregate is preliminarily formed into a tubular shape from a sheet shape by providing a shaping guide having a curved surface necessary for smoothly transferring the sheet-shaped reinforcing material aggregate to a cylindrical shape having a joint in the longitudinal direction. A continuous pultrusion molding device characterized in that it is wound around a cylindrical mandrel vertically while being shaped into a shape.