JP2002156929A - Bar-shaped body made of fiber reinforced synthetic resin and producing method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bar-shaped body made of fiber reinforced synthetic resin which has a covering layer which is excellent in surface smoothness around a core part comprising glass fiber reinforced synthetic resin and to improve dimensional accuracy of the bar-shaped body made of fiber reinforced synthetic resin having an angular external shape. SOLUTION: This bar-shaped body made of fiber reinforced synthetic resin 1 which is a transverse support 1' which suspends a flag 8 is provided with a core part 2 which is formed with at least reinforcing fiber material 2a and thermosetting resin as a binder material 2b which is immersed in the reinforcing fiber material 2a, and a covering layer 3 made of thermoplastic resin which is stuck to the periphery of the core part 2. This producing method of bar-shaped body made of fiber reinforced synthetic resin 1 comprises at least a covering process P1 which covers the core part 2 with the thermoplastic resin which is melt and a cooling and solidifying process P2 which cools and solidifies the covering layer 3 which is disposed around the core part 2 with cooling water 14. Therein, a molding device 15 which has a molding nozzle 152 which is opened in rectangular is disposed on an inlet part of a cooling vessel 13 which stores the cooling water 14 and the bar-shaped body made of fiber reinforced synthetic resin 1 is molded in an angular external shape in the stage of being passed through the molding nozzle 152 and is transferred to the cooling and solidifying process P2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a fiber-reinforced synthetic resin rod suitable for a horizontal support for suspending a flag such as a rising flag and a fiber-reinforced synthetic resin rod having a square outer shape. About.

[0002]

2. Description of the Related Art In recent years, glass fiber reinforced synthetic resins (hereinafter referred to as "GFRP") and other fiber reinforced synthetic resins whose strength and heat resistance have been enhanced by putting long fiber reinforcing materials into synthetic resins. Is widely used and is used for roofing materials, bathtubs, tanks, automobile bodies, supports, and the like.

[0003] As shown in FIG. 7, a fiber-reinforced synthetic resin such as GFRP is also used for a horizontal support 101 of a rising flag 100 set up at a storefront or the like. This is because by employing the horizontal support 101 made of fiber reinforced synthetic resin, it is possible to secure a certain strength such as rigidity or the like in the horizontal support 101 portion, and the rising flag 100 can be fluttered or swung by the wind. This is because, even in this case, the horizontal support 101 can reliably support and suspend in a normal state with the flag 102 stretched.

The horizontal support 101 has a synthetic resin joint 104 for supporting the horizontal support 101 and the vertical support 103, and a support band 1 sewn to the upper end of the flag 102.
A hook 106 for hooking one of the members 105
Is inserted.

[0005] Further, since various supporting rods such as the horizontal support 101 which plays a role of suspending the flag 102 in a stretched state are required to have a certain degree of bending rigidity or the like, the vertical cross section is rectangular. , And is used (vertically) with the long side direction of the rectangle coinciding with the direction in which the load is applied.

[0006]

However, the above prior art has the following technical problems.

First, the first technical problem is that the rising flag 100
A synthetic resin joint 104 for the horizontal support 101,
When performing assembling and disassembling operations of the rising flag including the operation of inserting and removing the hook 106, when the surface layer is deteriorated due to use, the glass fiber of the surface layer of the horizontal support 101 may be stuck in the hand or the like of the operator. This is an issue to solve the problem. Conventionally, since this technical problem has not been solved, great care has been required for assembling and dismantling the rising flag.

[0008] Next, a second technical problem is that a horizontal supporting column 10 in which a reinforcing fiber material such as glass fiber is exposed.
The problem 1 is to solve the problem that is hindered when the above-mentioned synthetic resin joint, 104, hook 106 and flag support band 105 are smoothly inserted and removed because the surface is not smooth and the slip is poor. It is.

[0009] A third technical problem is that a support rod-like body formed into a square shape like a lateral support of a rising flag tends to bulge outward particularly on a long side. It is an object to solve a problem in a manufacturing process that it is difficult to obtain a predetermined size or outer shape. If there is an error in the dimensions or outer shape of the support rod shaped into a square shape, it will be difficult to attach accessories or it will not be possible to fix the accessories, so improved manufacturing that can achieve improved dimensions and outer shape accuracy A way was sought.

Therefore, the present invention provides (1) a coating layer having a high surface smoothness around a core made of glass fiber reinforced synthetic resin so as to be suitable as a horizontal support for suspending a flag such as a rising flag. Providing a rod-shaped body made of fiber-reinforced synthetic resin; (2)
(3) The dimensions or outer shape of the fiber-reinforced synthetic resin rod-shaped body having a square outer shape should be ensured so that the coating layer and the core have sufficient adhesiveness or adhesion. The main object of the present invention is to provide a manufacturing method capable of improving accuracy.

[0011]

Means for Solving the Problems In order to solve the above-mentioned technical problems, the following means is employed in a fiber-reinforced synthetic resin rod according to the present invention.

First, regarding a member used as a horizontal support for suspending a flag, at least (A) a reinforcing fiber material, a thermosetting resin impregnated in the reinforcing fiber material and binding the reinforcing fiber material, And (a) a coating layer made of a thermoplastic resin adhered to the periphery of the core portion.

[0013] In the rod-shaped body made of fiber-reinforced synthetic resin having the above-described structure, the surface of the rod-shaped body is covered so that the reinforcing fiber material contained in the core is not exposed to the surface of the rod-shaped body. In the operation of inserting and removing various members, the reinforcing fiber material is not injured by being stuck in the hand of an operator or the like. That is, the first technical problem described above can be solved.

Further, since the surface smoothness can be ensured by providing a coating layer on the surface of the fiber reinforced synthetic resin rod according to the present invention, various members can be smoothly inserted into and removed from the rod. become able to. That is, the above-described second technical problem can be solved.

Next, in the rod-shaped body made of fiber-reinforced synthetic resin according to the present invention, the thermoplastic resin constituting the coating layer covering the core, the cross-linking component contained in the thermosetting resin of the core being a monomer A copolymer or a modified product containing at least a component is selected.

According to this means, since the core and the coating layer contain a common component, the adhesiveness and affinity of the interface between the coating layer and the core can be ensured. Disappears. That is, even if the fiber-reinforced synthetic resin rod according to the present invention is continuously used, the coating layer is not peeled off at the end of the rod, and the core is not exposed.

The fiber-reinforced synthetic resin rod having the above-described means has a high rigidity and a high surface smoothness, so that it is suitable for a support rod into which various components are inserted and with which a load is applied. Especially, it is most suitable as a horizontal support of a rising flag.

Subsequently, in the present invention, a core portion formed of a reinforcing fiber material and a thermosetting resin impregnated in the reinforcing fiber material is covered with the thermoplastic resin melted in an uncured state. A coating step, and a cooling and solidifying step of cooling and solidifying the coating layer provided around the core by the coating step with cooling water, and a method for producing a fiber-reinforced synthetic resin rod-shaped body having at least Adopt means.

That is, a forming apparatus having a forming nozzle having a rectangular opening is disposed at an inlet (front wall) of a cooling tank for storing cooling water used in the cooling and solidifying step, and the forming apparatus passes through the forming nozzle. In the process of forming, it is formed into a square outer shape, and the process is shifted to a cooling and solidifying process.

More specifically, a fiber-reinforced material such as glass fiber is impregnated with a thermosetting resin, and the fiber-reinforced material is bound and drawn to form an uncured core. The molten thermoplastic resin is extruded from a predetermined die to cover the core, and then is passed through a forming nozzle arranged at the inlet of the cooling tank, thereby gradually cooling the coating layer. It is molded into the shape of the shape. Thereafter, the coating layer is continuously cooled and solidified in a cooling bath to maintain the outer shape, and then passed through a thermosetting bath heated to a predetermined temperature to cure the thermosetting resin of the core.

According to this manufacturing method, by selecting the inlet of the cooling bath in a cold environment and extending the forming nozzle, the outer wall of the forming object is regulated by the inner wall surface of the forming nozzle. Since the coating layer is gradually cooled, and subsequently cooled and solidified in a cooling bath without a break, it is possible to reliably produce a square fiber-reinforced synthetic resin rod having high dimensional accuracy.

Here, if the contact pressure between the coating layer and the molding nozzle is not constant, that is, if the pressure is applied in a specific direction, the outer shape of the molded product is likely to be distorted or swelled, There is a possibility that the thickness of the layer is deformed, the density of the reinforcing fiber material in the core portion becomes uneven, or the like.

Therefore, in the present invention, a molding apparatus having a molding nozzle is arranged so as to be finely movable in the vertical and horizontal directions with respect to the cooling tank, so that the contact pressure between the coating layer and the molding nozzle is made constant. .

By this means, it is possible to improve the dimensional accuracy, equalize the rigidity, equalize the thickness of the covering layer, etc. of the square fiber-reinforced synthetic resin rod used as a support member such as the horizontal support of the rising flag. Can be achieved.

As described above, the present invention provides a rod-shaped body made of a fiber-reinforced synthetic resin having all of rigidity, surface smoothness, and durability, which is suitable for a support member such as a horizontal support for suspending a flag such as a rising flag. In addition, it has the technical significance of providing a method for reliably producing a rod-shaped body made of a fiber-reinforced synthetic resin having a high dimensional accuracy to the industry.

[0026]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

First, FIG. 1, which is an attached drawing, is a view for explaining a cross-sectional structure of a fiber-reinforced synthetic resin rod 1 according to the present invention, and FIG. 2 is a typical example to which the fiber-reinforced synthetic resin rod is applied. The figure explaining the structure of the horizontal support 1 'of the rising flag which is an example,
Is

In FIG. 1, a rod-shaped body made of fiber-reinforced synthetic resin indicated by reference numeral 1 (hereinafter referred to as a "bar-shaped body") is a rectangular rod-shaped body having a substantially rectangular vertical cross section, and has a two-layer structure. . The inner core portion 2 is hardened after being impregnated with a large number of long-fiber reinforcing fiber materials 2a and the reinforcing fiber material 2a,
And a thermosetting resin functioning as a binder 2b for firmly binding the reinforcing fiber material 2a.

Here, as the reinforcing fiber material 2a, organic fibers such as aromatic polyamide fiber (aramid fiber), polyparaphenylene benzoocosasol (PBO) fiber, polyester fiber or vinylon fiber, glass fiber, carbon fiber, ceramic fiber Although inorganic fibers such as fibers or metal fibers can be used, glass fibers, carbon fibers, and inorganic fibers such as ceramic fibers are preferable from the viewpoint of mechanical properties, particularly bending properties, and glass fibers are also considered in view of cost. Is particularly preferred.

As the thermosetting resin functioning as the binder 2b, an unsaturated alkyd resin or an unsaturated polyester resin obtained by combining epoxy acrylate with a crosslinkable substance such as styrene can be used.

Examples of the unsaturated alkyd include unsaturated dibasic acids such as maleic anhydride, fumaric acid, and itaconic acid, and saturated dibasic acids such as phthalic anhydride, isophthalic acid and adipic acid as polybasic components, and polyhydric alcohols. Those obtained by polycondensing ethylene glycol, propylene glycol, diethylene glycol and other glycols as components can be used.

As the epoxy acrylate, bisphenol type epoxy acrylate or novolak type epoxy acrylate, a mixture thereof or various modified products can be used.

The periphery of the core 2 having the above-described material configuration is surrounded by a coating layer indicated by reference numeral 3, and the surface 21 of the core 2 and the inner surface 31 of the coating layer 3 are tightly and firmly adhered. , The coating layer 3 is not easily peeled off.

The coating layer 3 can be made of a thermoplastic resin which has good adhesiveness and affinity with the core 2 and which can ensure surface smoothness during curing. For example, in the core 2 in which the thermosetting resin 2b using styrene as a cross-linking component is employed, the thermosetting resin 2b is compatible in an uncured state, and is extremely strong with the core 2 after curing. It is preferable to use a copolymer containing a styrene-based resin, which adheres to the polymer.

As such a copolymer, for example, A
AS (acrylonitrile-acryl rubber-styrene copolymer), ABS (acrylonitrile-butadiene-styrene copolymer), AES (acrylonitrile-EPDM)
Rubber-styrene copolymer) and modified PSU (diphenylsulfone-bisphenol A copolymer modified with polystyrene) can be used.

The thermoplastic resin used in the coating layer 3 may be added to known heat stabilizers, anti-aging agents, weather stabilizers, lubricants, organic or inorganic pigments, carbon black, eyes and flame retardants, flame retardants, Inhibitors, fillers and the like may be added as long as the object of the present invention is not impaired.

As shown in FIG. 1, the rod-shaped body 1 having the above configuration is arranged and used so that the direction in which the load is applied is the long side direction L as shown in FIG. desirable.

The rod 1 according to the present invention has high rigidity,
Since it has surface smoothness, weather resistance, heat resistance, and other durability, and also has the coloring property of being able to use a coloring resin for the coating layer resin, the horizontal support 1 disposed above the rising flag 7 that is set up at a store or the like. 'Can be used as a support rod.

As a means for coloring a fiber-reinforced synthetic resin rod having no coating layer 3, a method in which a pigment is directly added to an uncured resin or a method in which a paint is coated on the surface layer is used. As conceivable, the former has a problem that the pigment hinders the curing of the resin, and the latter has a problem that the number of steps is increased due to the addition of a coating step. Therefore, the method of forming the coating layer 3 colored with the colored resin of the present invention is advantageous because such a problem does not occur.

The structure of the horizontal support 1 'will be briefly described with reference to FIG. 2, which is a front view of the periphery of the horizontal support 1' of the rising flag 7. The horizontal support 1 'includes a synthetic resin joint member. 5
Then, the synthetic resin hook 6 is inserted.

More specifically, first, the joint member 5 has a cylindrical hole 52a that opens downward,
A cylindrical portion 52 having a configuration in which the upper end of the vertical support 4 is inserted into
A pedestal portion 51 formed above the cylindrical portion 52 and having a concave portion 51a into which a lateral support 1 'is fitted, and a female screw screwed into the male screw portion (not shown) Fixed cap 5 with
3 is provided.

By tightening the fixing cap 53, the horizontal support 1 'fitted in the recess 51a can be clamped and fixed between the recess 51a and the lower end of the fixing cap 53.

Next, the hook 6 is provided with a long hole 6a into which the tip of the horizontal support 1 'is inserted, and a support at the upper end corners of the support bands 9, 9, 9 sewn to the upper end of the flag 8. And a gap hole 6a for hooking the band 9a.

The joint member 5 and the hook 6 having the above structure
Are members that are inserted into the horizontal columns 1 ′ as described above, but the horizontal columns 1 ′ are covered with the coating layer 3,
Because of the surface smoothness, these members can be smoothly inserted and removed. In addition, since the reinforcing fiber material 2b of the core portion 2 does not protrude in a streak shape on the surface layer of the horizontal support 1 ', the support band 9 formed of cloth or the like also has little friction and does not get caught. It can be smoothly inserted and removed from the horizontal support 1 '.

Further, since the horizontal support 1 ′ has a structure in which the coating layer 3 and the core 2 are firmly bonded, the horizontal support 1 ′ is fixed when the joint member 5 and the hook 6 are inserted and removed or by the fixing cap 53. Even when a force is applied during the clamping, the covering layer 3
Is not separated from the core 2.

Further, since the horizontal support 1 'is covered with the coating layer 3, there is no risk of injury to the operator due to the rebound resilience at the time of breakage.

Hereinafter, an embodiment of a manufacturing method most suitable for forming the rod-shaped body 1 according to the present invention will be described with reference to FIGS.
Explanation will be given based on FIG.

FIG. 3 is a view for explaining the overall configuration of the method for manufacturing the rod-shaped body 1 according to the present invention, FIG. 4 is an external perspective view of a molding device 15 used in the method, and FIG. FIG. 6 schematically shows a state of being molded by the apparatus 15;
FIG. 5 is a cross-sectional view of the molding device 15 taken along the line II shown in FIG. 4.

First, the overall structure of the method of manufacturing the rod-shaped body 1 according to the present invention will be described with reference to FIG. 3. The reinforcing fiber material 2a wound in a roll is drawn out, and the uncured thermosetting material is cured. Drawn into the binder layer 10 in which the conductive resin is stored,
The reinforcing fiber material 2a is impregnated with a thermosetting resin.

Subsequently, the reinforcing fiber material (represented by the symbol W ₁ ) impregnated with the uncured thermosetting resin is drawn into the drawing nozzles 11 arranged side by side in the drawing direction Z, and has a vertical cross section of a predetermined dimension. obtaining a rectangular uncured product W _2.

The uncured material W ₂ is guided to a central passage 121 a of a jacket-shaped nipple 121 disposed at the center of the coating material extruder 12 disposed behind the squeezing nozzle 11 so as to surround the nipple 121. Die 1 arranged in
At about the same time when it is pulled out from the nozzle opening 122a of the nozzle 22,
The uncured material W ₂ is coated with a thermoplastic resin 3 in a molten state discharged from the nozzle opening 122a (hereinafter, referred to as coating step P _1).

[0052] Following the coating step P _1, arranged behind the covering material extruder 12, unsolidified coating the molding device 15 mounted on the front wall 131 of the cooling water 14 is stored has been that cooling tank 13 directing W ₃ (see in particular Figure 4).

Here, while the thermoplastic resin 3 'as the coating material is in a melt-softened state, the molding device 15 moves the horizontal support 1'.
Molding nozzle 152 having a rectangular inner shape corresponding to the final product shape equal draws unsolidified coating W ₃ (see FIG. 5), while regulating the outer shape by the forming nozzle 152 that extends in the drawing direction Z Cooling.

More specifically, the molding device 15 controls the surface of the unsolidified coating W ₃ by contacting the smooth inner wall surface 152 a of the thermoplastic resin 3 ′ with the surface of the thermoplastic resin 3 ′ so as to regulate the outer shape to a desired outer shape. While smoothing the surface of the thermoplastic resin 3 ′, the uncured material W ₂ inside is molded into the shape of the molding nozzle 152 via the thermoplastic resin 3 ′ around the outside, and the thermoplastic resin 3 ′ is gradually removed. Cool and solidify.

[0055] By using the molding apparatus 15, like previously predetermined frame shape similar state of the molded article and the state filled with uncured product W ₂ inside the molded thermoplastic resin 3 'is obtained Therefore, it is possible to mold the rod-shaped body 1 having the coating layer 3 having a uniform thickness and a smooth surface and the core 2 having a uniform outer shape, and having high dimensional accuracy of the product outer shape.

[0056] Further, according to the molding device 15, the surface layer of the thermoplastic resin 3 ', so will be pressed against the inside of the uncured material W _2, constituting the rod-shaped body 1 is molded product The core layer 2 is brought into close contact with the coating layer 3 (thermoplastic resin 3 ′)
Adhesion can be ensured after curing.

Here, in the present invention, the molding device 15
Are arranged so as to be finely movable in the vertical direction Y and the horizontal direction X with respect to the pull-out direction Z (see FIG. 5) with respect to the cooling bath 13 which is fixedly installed, so that the coating layer 3 and the forming nozzle 152 ( It is devised to keep the contact pressure of the inner wall surface 152a) constant.

In this configuration, the forming device 15 includes a substantially U-shaped guide groove 13 formed on the front wall 131 of the cooling bath 13.
1a, the front surface 131a and the rear surface 13 of the front wall 131.
A fitting groove 151 having a width with which 1b is in close contact is provided around, and a substantially rectangular parallelepiped casing 153 that can be vertically divided at a dividing line position indicated by reference numeral 154, and substantially in the center of the casing 153,
A rectangular forming nozzle 152 extending along the drawing direction Z.

Here, the molding device 15 is fixed so as not to move in the drawing direction Z by the above configuration, while the cooling tank 1 is fixed in the vertical direction Y and the horizontal direction X.
3 (the front wall 131 thereof).

That is, the tension applied to the unsolidified coating material W ₃ drawn into the forming nozzle 152 is dispersed in the vertical direction Y and the left and right direction X by slightly moving the forming device 15, and the coating layer 3 and the forming nozzle 152 are dispersed. To make the contact pressure constant. With this configuration, it is easier to further improve the dimensional accuracy of the square rod-shaped body 1, equalize the rigidity, uniform the thickness of the coating layer, and the like.

As shown in FIG. 6, the fitting groove 151 provided around the forming device 15 and the front wall 1 of the cooling bath 13 are provided.
By interposing an elastic body such as rubber between the guide grooves 131a formed in the cover layer 31, the coating layer 3 and the forming nozzle 1
The structure for stabilizing the contact pressure of 52 may be finely adjusted. The plate member denoted by reference numeral 131c is a member that is fitted into the guide groove 131a and restricts the upward movement of the molding device 15.

The coated material W _{4 that} has passed through the molding device 15 having the above-described configuration proceeds to the cooling and solidifying step P ₂ (see FIG. 3), and the cooling water 1 stored in the cooling tank 13
And the surface of the thermoplastic resin is solidified.

Following the cooling and solidifying step P ₂ , the cooling tank 13
Of disposed behind, the steam curing tank 17 that is managed to a predetermined temperature, led to the coating like material W ₄ in a state where the coating layer 3 has solidified, is still present in the uncured state (binder 2b The thermosetting resin is thermoset to obtain a rod-shaped body 1 (1 ′) made of a fiber-reinforced synthetic resin.

Hereinafter, the physical properties of the rod 1 formed by the manufacturing method according to the present invention will be described based on examples and comparative examples.

Example. As the reinforcing fiber material 2a, glass roving (RS220RL, 2250 tex, manufactured by Nitto Boseki Co., Ltd.), unsaturated polyester resin (manufactured by Showa Polymer Co., Ltd., Rigolac E-20)
0) was impregnated with a thermosetting resin containing a peroxide catalyst, and the outer diameter of 3.9 × 6.
The uncured material W ₂ molded to 9 mm and having a glass fiber volume content of 62.5% was guided to the coating material extruder 12. Then, an AAS resin (manufactured by Ube Sycon; Weatherfill MD-120-123176WHITE), which is a thermoplastic resin,
Extruded through an annular nozzle opening 122a of the die 122 in a molten state, it covers the uncured material W ₂ to a thickness of 0.5 mm, immediately thereafter, horizontal 10.0 × vertical 4 of the molding apparatus 15.
It was inserted through a 6 mm forming nozzle 152 and led to the cooling tank 13 to cool and solidify the coated portion. Subsequently, at 100 ° C
The thermosetting resin in the uncured state impregnated in the glass fibers is thermosetted into the steam curing tank 17 having a size of 7.8 ×
A 4.7 mm rod was obtained.

Comparative Example 1 A low-density polyethylene resin (manufactured by Nippon Unicar; DFDJ0588, containing carbon black) was used as the thermoplastic resin constituting the coating layer 3. Other conditions are the same as in the above-described embodiment.

Comparative Example 2 After the coating process P _1, without the use of molding apparatus 5,
Except that was transferred to the cooling and solidification step P _2, to produce a rod-shaped body under the same conditions as the previous examples.

Table 1 shows the results of measuring the physical properties of the rods of the above Example, Comparative Examples 1 and 2, respectively. In addition,
The physical property measuring method is as follows.

The outer dimensions of the bar were measured at three locations of the bar and calculated from the average of the vertical and horizontal data. The outer dimensions of the core 2 were measured by measuring the dimensions of the core 2 at three locations by removing the coating layer 3 of the rod-shaped material and calculating the average value of the vertical and horizontal data. The bending strength and the bending rigidity were measured by three-point bending at a distance between supporting points of 100 mm and a bending load speed of 5 mm / min. The measurement of the protrusion amount of the core 2 is as follows.
The 1 m long rod sample was left in an oven at 100 ° C. for 1 hour, the protrusion amount of the core 2 before and after the test was measured, and the difference between the protrusion amount before and after the test was determined as the sample length before the test (1 m).
The value obtained by dividing by is defined as the protrusion amount (%).

[0070]

[Table 1]

When the results shown in Table 1 are analyzed, first, in the rod-shaped body according to the example, the vertical dimension 4.7 mm which is close to the vertical dimension 4.6 mm of the forming nozzle 15 (increase dimension 0.
1 mm), but in Comparative Example 2 molded without using the molding device 15, the vertical dimension was 5.4 mm (increase dimension 0.8
mm), and the vertical dimension is increased by eight times as compared with the embodiment. Therefore, in the embodiment, it is clear that the vertical dimension regulating action by the molding nozzle 152 is effectively exerted, and the dimensional accuracy of the outer shape is good.

In the outer dimensions of the core 2, the forming nozzle 1
The rod-shaped body according to the example and the comparative example 1 were both 4.0 mm in length, and the forming nozzle 1 was used.
52 is not used, and the vertical dimension of Comparative Example 2 is 4.6 mm.
Therefore, the vertical dimension regulating action of the molding nozzle 152 is effectively exerted also on the core 2, which is favorable.

Next, as shown in Table 1, the bar-shaped body according to the example has a longitudinal bending strength of 1.11 times (878 ÷ 789) and a horizontal bending strength of 1.10 compared to Comparative Example 1. 12 times (89
9 ÷ 803), and the longitudinal bending strength is 1.73 times (878 ÷ 506) and the lateral bending strength is 1.79 times (89) as compared with Comparative Example 2 molded without using the molding nozzle 152.
9 ÷ 501). Therefore, in the example, the bending strength is larger and better than that of the comparative examples 1 and 2 in any of the vertical and horizontal directions. In particular, it is apparent that a high level of bending strength is obtained by the action of the forming nozzle 152. It is.

Further, when viewed in terms of bending stiffness, the rod-shaped body according to the example has a vertical bending stiffness of 1.04 of Comparative Example 1.
And 1.10 times that of Comparative Example 2. Therefore, the rod-shaped body according to the embodiment is particularly suitable as a rod-shaped body (for example, a horizontal support 1 'used for the rising flag 7) used in a state where a load is applied in the vertical direction, which has a higher bending rigidity.

Looking at the protrusion amount, the rod-shaped body according to the example has a protrusion amount of 0.0%, which is better than that of Comparative Example 1. Therefore, the rod-shaped body according to the embodiment is suitable for continuous use and has weather resistance and the like.

As can be seen from the comparative analysis of the embodiment described above and Comparative Examples 1 and 2, the rod 1 formed by the manufacturing method according to the present invention has high dimensional accuracy, high bending strength and high bending rigidity. And the amount of protrusion is small. In addition, the coating layer 3
Is provided, and the rod-shaped body 1 has surface smoothness.
The operation of inserting and removing various members with respect to the coating layer is smooth, and the coating layer has coloring properties such that a colored resin can be used. Therefore, it is suitable for a support rod-shaped body such as the horizontal support 1 'for supporting the flag 8 of the rising flag 7.

[0077]

According to the present invention, a fiber-reinforced synthetic resin in which a coating layer having a high surface smoothness is provided around a core made of glass fiber-reinforced synthetic resin so as to be suitable as a horizontal support for suspending a flag such as a rising flag or the like. It is possible to provide a resin rod-shaped body, and to ensure the adhesion between the coating layer and the core so that the core does not protrude, and a fiber having a square outer shape. A manufacturing method capable of improving the accuracy of the size or outer shape of the reinforced synthetic resin rod can be provided.

[Brief description of the drawings]

FIG. 1 is a rod-shaped body made of a fiber-reinforced synthetic resin according to the present invention (1).
For explaining the cross-sectional structure of

FIG. 2 is a view for explaining a configuration of a horizontal support (1 ′) of a rising flag (7), which is a typical example to which the fiber-reinforced synthetic resin rod (1) is applied.

FIG. 3 is a rod-shaped body made of a fiber-reinforced synthetic resin according to the present invention (1).
To explain the overall configuration of the manufacturing method

FIG. 4 is an external perspective view of a molding device (15) used in the manufacturing method.

FIG. 5 is a diagram schematically showing a state of being molded by the molding apparatus (15).

FIG. 6 is a cross-sectional view of the molding device (15) taken along line II of FIG. 4;

FIG. 7 is a horizontal support (101) made of a fiber-reinforced synthetic resin rod.
The figure which shows the whole structure of the rising flag (100) used for the part

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Fiber-reinforced synthetic resin rod 1 '(Hanging flag) horizontal support (fiber-reinforced synthetic resin rod) 2 Core 2a Reinforcement fiber 2a 2b Binder (thermosetting resin) 3 Coating layer 3 '' Thermoplastic resin in a molten state (cured to form coating layer 3) 8 Flag 13 Cooling tank 14 Cooling water 15 Molding device 131 Front wall 152 (corresponding to the inlet of cooling tank 13) 152 (provided in molding device 15) was) molding nozzle P ₁ coating process P ₂ cooling and solidifying step

Claims (4)

[Claims] 1. A fiber-reinforced synthetic resin rod comprising at least the following (A) and (A), which is a member used as a horizontal support for suspending a flag. (A) A core formed from a reinforcing fiber material and a thermosetting resin impregnated in the reinforcing fiber material and binding the reinforcing fiber material. (A) a coating layer made of a thermoplastic resin fixed around the core. 2. The fiber-reinforced synthetic material according to claim 1, wherein the thermoplastic resin is a copolymer or a modified product containing at least a crosslinking component contained in the thermosetting resin as a monomer component. A rod made of resin. 3. A coating step of coating a core portion formed of a reinforcing fiber material and a thermosetting resin impregnated in the reinforcing fiber material with the molten thermoplastic resin; A cooling and solidifying step of cooling and solidifying the coating layer provided around the cooling layer with cooling water, and a molding device having a molding nozzle having a rectangular opening at an inlet of a cooling tank storing the cooling water. A method for producing a rod-shaped body made of fiber-reinforced synthetic resin, wherein the rod-shaped body is formed into a rectangular outer shape in a process of disposing and passing through the forming nozzle, and then proceeding to the cooling and solidifying step. 4. The fiber-reinforced synthetic material according to claim 1, wherein the molding device is arranged so as to be finely movable in the vertical and horizontal directions with respect to the cooling bath so as to keep the contact pressure between the coating layer and the molding nozzle constant. A method for producing a resin rod.