JPH10249951A - Manufacture of laminated tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify a finishing step by winding a sheet prepreg on a mandrel coated with mold release agent, coating an outer periphery of a pressure baked blank tube with paint obtained by mixing high hardness fine particles with resin of the same resin impregnated into the prepreg, and again pressure baking it, thereby eliminating blister. SOLUTION: A sheet prepreg obtained by impregnating reinforcing fiber cut in a predetermined shape with synthetic resin is wound on a mandrel A coated with mold release agent, and a wound layer 2a of the prepreg covered by a pressurizing means is heated and baked in a heating furnace. An outer periphery of the obtained blank tube 2 is formed with a coated film impregnated with high hardness fine particles. This paint coating step includes coating a surface of the tube 2 with paint obtained by mixing the high hardness fine particles with the same resin as synthetic resin impregnated into the prepreg and forming a coated film 3 thereon. A rebaking step is conducted by heating and baking the tube 3 having the film 3 on its periphery and repressurized in a heating furnace.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a non-painted and lightweight laminated pipe, particularly a fiber-reinforced synthetic resin laminated pipe most suitable for a fishing rod.

[0002]

2. Description of the Related Art Fiber-reinforced synthetic resin laminated tubes are widely used as materials requiring high elasticity and light weight, such as fishing rods, golf club shafts, tennis and badminton rackets, and the like.

[0003] In order to wind the unidirectionally aligned sheet prepreg in the axial direction in accordance with the required elastic strength, these laminated tubes are used to increase the binding force between reinforcing fibers of the unidirectionally aligned sheet prepreg. A yarn prepreg, a tape prepreg, a cross prepreg, etc. are wound in the circumferential direction, and further, a winding tape is wound around these outer circumferences,
By pressurizing and baking this, the prepreg is cured to form a raw tube, and then the cored bar is removed, the tape is removed, the surface is polished, washed with water, dried, ground treatment,
It was formed through a complicated finishing step of re-drying, forming a coating film by applying a paint, and drying the coating film.

However, the finishing of the conventional laminated tube is performed by polishing the surface of the tube and then applying a coating to the surface of the tube and drying to form a coating film. In addition to impairing the mechanical properties of the laminated tube, the coating increases the weight and impairs the weight reduction,
Further, there is a problem that blisters are generated between the base tube and the coating film due to scratches on the coating film, water penetrating from the inner peripheral surface of the base tube, and the like.

Therefore, Japanese Patent Laid-Open Publication No. Hei 3-10631 (hereinafter referred to as "prior art A") discloses a solution to this problem.
A coating material in which a hardening agent is mixed with a main agent composed of ethylene trifluoride resin is applied to the surface of the base tube which has been subjected to surface polishing and ground treatment, and water is applied to the surface of the laminated tube by the water repellency of ethylene trifluoride chloride. Techniques have been proposed for preventing the generation of prestar by preventing adhesion and penetration.

Japanese Unexamined Patent Publication No. Hei 7-171921 (hereinafter referred to as "prior art B") discloses, as a solution to the above-mentioned technical problem, an outer periphery of a prepreg wound around a core metal in an axial direction or the like. The surface is heated to soften the synthetic resin on the surface, and then high-hardness fine particles made of ceramic fine particles such as spherical alumina, SiC, SiN or zirconia are adhered together with a pigment and a solid lubricating powder, if necessary. ,
A wrapping tape is wound around the outer periphery, and the prepreg is hardened by pressing and firing the prepreg to form a raw tube, and then the core metal is decored and the wrapping tape is removed. There has been proposed a method for manufacturing a laminated tube which eliminates the need for polishing the surface of the tube or forming a coating film.

[0007]

However, in the finishing of the prior art A, a solvent such as methyl ethyl ketone is mixed with isocyanate in a base material composed of ethylene trifluoride chloride resin having excellent water-repellency instead of the conventional paint. However, there is a problem that the adhesion between the surface of the raw tube and the trifluoroethylene chloride resin paint is difficult, and the occurrence of blisters cannot be eliminated at all.

The finishing of the prior art B involves heating the outer peripheral surface of a prepreg wound on a core metal to soften a synthetic resin on the surface, and then attach high-hardness fine particles or the like. When reinforcing fibers or these yarns are wound or woven on the outermost peripheral surface of the prepreg wound in the axial direction or the like, there is a problem that high-hardness fine particles cannot be adhered because there is no synthetic resin on the surface. there were.

When the content of the synthetic resin in the prepreg is large, high-hardness fine particles are ejected from between the winding tapes together with the synthetic resin softened at the time of pressurizing and firing, so that a uniform surface hardness cannot be obtained. Problems arise.

Further, when a pigment or a solid lubricant is adhered together with the high-hardness fine particles, for the same reason, there arises a problem that color spots and a uniform water-repellent surface cannot be obtained.

In view of the above-mentioned problems of the prior arts A and B, the present invention is intended to manufacture a lightweight laminated tube which does not generate blisters, has a simple finishing process, and can obtain uniform surface hardness, color and water repellency. The aim is to provide a method.

[0012]

According to a first aspect of the present invention, there is provided a method for manufacturing a laminated tube, comprising: winding a sheet prepreg having a reinforcing fiber impregnated with a synthetic resin on a core metal A coated with a release agent; Is applied to the outer peripheral surface of the base tube 2 which is pressure-fired by a conventional method, and a coating material in which high hardness fine particles are mixed with a resin of the same system as the synthetic resin impregnated in the sheet prepreg is applied. It is characterized by firing.

According to this manufacturing method, the following effects are obtained.

[0014] After coating the outer peripheral surface of the raw tube pressed and fired by a standard method with a resin in which high hardness fine particles are mixed into a resin of the same system as the synthetic resin impregnated in the sheet prepreg on which the raw tube is formed, the coating method is repeated again. As a result, the base tube and the coating layer are melted and adhered to each other, so that delamination or the like does not occur.

Since high-hardness fine particles are mixed in the paint applied to the surface of the pressure-fired raw tube, the high-hardness fine particles can be uniformly exposed on the surface of the applied paint.

After applying a paint mixed with high-hardness fine particles to the surface of the pre-fired raw tube, the high-pressure fine particles are wound together with the synthetic resin softened at the time of press-firing, because pressure-firing is performed again by a standard method. It is possible to obtain a uniform surface hardness in which high-hardness fine particles are uniformly distributed and exposed on the surface without jetting out from between the tapes, and it is possible to prevent the outer peripheral surface of the laminated tube from being damaged.

[0017] Since high-hardness fine particles are mixed in the paint, even if the paint-coated layer is formed as thin as possible, a desired surface hardness can be obtained and an increase in weight can be prevented.
A lightweight laminated tube can be provided.

According to a second aspect of the present invention, there is provided a method for manufacturing a laminated tube.
A sheet prepreg in which a synthetic resin is impregnated with reinforcing fibers is wound around a core metal A coated with a release agent, and the sheet prepreg is impregnated with the sheet prepreg on the outer peripheral surface of a raw tube 2 which is pressure-fired by a conventional method. It is characterized in that a resin of the same system as the resin is applied, semi-dried, a high-hardness fine particle is adhered to the surface of the semi-dried coating film 3a, and then pressure-fired again by a standard method.

According to this manufacturing method, the following effects are obtained.

A resin of the same type as the synthetic resin impregnated in the sheet prepreg on which the base tube is formed is applied to the outer peripheral surface of the base tube which has been pressure-fired by a conventional method, and is semi-dried. After the fine particles are adhered, pressure baking is performed again by a standard method, so that the base tube and the coating layer are melted and adhered to each other, so that delamination or the like does not occur.

A resin is applied to the surface of the pressure-fired raw tube, which is semi-dried, and the high-hardness fine particles adhere to the surface of the semi-dried coating film. And the like, and the like, can be prevented, and the high-hardness fine particles can be uniformly exposed on the surface of the resin.

A resin is applied to the outer peripheral surface of the prefired raw tube, semi-dried, and high-hardness fine particles are adhered to the surface of the semi-dried coating film, and then pressure-fired again by a standard method. Therefore, together with the synthetic resin softened at the time of firing under pressure, the high-hardness fine particles do not squirt out from between the winding tapes, and the high-hardness fine particles are uniformly exposed on the surface, and a uniform surface hardness is obtained. Damage can be prevented.

[0023] A resin is applied to the outer peripheral surface of the base tube, which is semi-dried, and the high hardness fine particles are adhered to the surface of the semi-dried coating film. Therefore, even if the coating layer is formed as thin as possible. , The desired surface hardness is obtained, preventing an increase in weight,
A lightweight laminated tube can be provided.

According to a third aspect of the present invention, there is provided a method of manufacturing a laminated tube.
3. The method according to claim 1, wherein a solid lubricating powder is mixed into the paint or adhered to the surface of the semi-dry coating film 3a together with the high-hardness fine particles.

According to this manufacturing method, the following effects are obtained.

Since the solid lubricating powder is mixed with the paint or adhered to the surface of the semi-dried coating film together with the high-hardness fine particles, a special rod manufacturing process is added by performing any of these steps. Thus, a laminated pipe having a uniform water-repellent surface can be obtained, and adhesion of water, dust, fishing line, and the like to the laminated pipe surface can be prevented.

When pressure is applied by using a winding tape, after the peeling of the winding tape, an uneven surface is formed on the surface of the laminated tube due to the tightening, and as a result, the surface of the laminated tube And the contact area between the fishing line and the fishing line is reduced. Therefore, it is possible to prevent the fishing line from adhering to the surface of the laminated tube, and thereby reduce the sliding resistance of the fishing line.

In addition, the water repellent action of the solid lubricating powder exposed on the surface prevents penetration of water or the like into the laminated pipe. As a result, damage to the laminated pipe can also be prevented.

Further, the solid lubricant powder exposed on the surface is
Because of excellent releasability, silane coating on the winding tape is not required, and it is possible to facilitate the winding tape and the like wound around the outer periphery during re-pressing and firing.

According to a fourth aspect of the present invention, there is provided a method for manufacturing a laminated tube.
The method according to any one of claims 1 to 3, wherein a coloring agent is mixed into the coating material or adhered to the surface of the semi-dry coating film 3a together with the high-hardness fine particles or the solid lubricant powder. .

According to this manufacturing method, the following effects are obtained.

Adding a special rod manufacturing process by performing any of these steps in order to mix the colorant into the paint or adhere to the surface of the semi-dried coating film together with the high hardness fine particles or the solid lubricating powder. And a laminated tube having a uniform color surface can be obtained.

Depending on the color of the laminated tube, a colorant is mixed in the paint or adhered only to the surface of the semi-dried coating film, so that a laminated tube of a desired color can be obtained. There is no need to prepare and its maintenance and management is easy.

According to a fifth aspect of the present invention, there is provided a method of manufacturing a laminated tube.
The method according to any one of claims 1 to 4, wherein the coating is applied or the semi-dry coating 3a is formed after the outer peripheral surface of the raw pipe 2 is polished and finished. .

According to this manufacturing method, the following effects are obtained.

After polishing the outer peripheral surface of the raw pipe,
In order to apply paint or form a semi-dried coating film, it is possible to remove excess synthetic resin in the prepreg that swells on the surface of the base tube during pressure firing, thereby reducing the weight of the laminated tube. Obtainable.

[0037]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a method for manufacturing a laminated pipe according to the present invention will be described below with reference to FIG. FIG. 1 shows the first
It is an outline sectional view showing each process of a manufacturing method of a lamination tube of the present invention by an example.

In the method of manufacturing a laminated tube according to the first embodiment of the present invention, a first process for forming the raw tube 2 and a coating film containing high-hardness fine particles are formed on the outer peripheral surface of the raw tube 2. And a second process.

The first process includes a sheet prepreg winding step, a pressing step, a firing step, and a shell finishing step.

The sheet prepreg winding step is shown in FIG.
As shown in (a), this is carried out by winding a sheet prepreg impregnated with a synthetic resin into a reinforcing fiber cut into a predetermined shape on a core metal A coated with a release agent. A wound layer 2a of the sheet prepreg is formed around A.

The reinforcing fibers in the sheet prepreg include:
Inorganic fiber such as carbon fiber, glass fiber, ceramic fiber, zirconia fiber, boron fiber, titanium fiber, stainless steel fiber, beryllium fiber, organic fiber such as aromatic polyamide fiber and polyester fiber, cotton, hemp, jute, sisal And other natural fibers.

As the synthetic resin impregnated in the sheet prepreg, it is desirable to use a thermosetting resin such as an epoxy resin, an unsaturated polyester resin, a vinyl ester resin, a polyimide resin, a polyurethane resin, and a phenol resin.

In addition, a sheet prepreg is prepared by winding a plurality of ply fibers in which the reinforcing fibers are aligned in one direction in the axial direction of the laminated pipe, and in the present invention, the reinforcing fibers are oriented in the axial direction with respect to the laminated pipe. Unidirectional aligned sheet prepreg oriented as described above, and unidirectional aligned sheet prepreg oriented such that the reinforcing fibers are oriented in the circumferential direction with respect to the laminated pipe, and wound to form an arbitrary number of each. Is also good. Further, a material having a cross prepreg, a scrim sheet, or the like interposed therebetween may be wound. The winding structure, the type of the prepreg, and the like are arbitrarily selected and used.

In the pressing step, as shown in FIG. 1B, the outer periphery of the above-mentioned wound layer 2a of the sheet prepreg is
This is performed by winding a winding tape 2 as a pressing means, which has been subjected to a release treatment such as a silicone coat on the surface of a tape of nylon or the like, at a predetermined pitch. Shape control is performed so as to have an external shape.

The pressurizing means is not limited to the above-mentioned winding of the tape B, but may be performed by using a known pressurizing means such as a release-treated tube or a mold. The outer periphery of the layer 2a may be covered.

The sintering step is performed by heating and sintering the wound layer 2a of the sheet prepreg wound around the cored bar A and covered by the pressurizing means in a heating furnace as described above.

In the initial stage of the firing step, the synthetic resin impregnated in the prepreg softens and flows toward the outside of the wound layer 2a together with the air entrapped at the time of winding and gas generated by heating.

When the heating in the sintering step is further continued, excess synthetic resin and air and gas flowing to the outer peripheral surface flow out from between the winding tapes B, and thereafter the synthetic resin is cured to form the raw tube 2. Is done.

The calcination step described above typically involves 120
Performed at で 160 ° C. for 2-3 hours.

In the tube finishing step, the core metal A is extracted from the tube 2 obtained by curing the synthetic resin in the firing step, and further, after pressing means, that is, the winding tape B is removed (see FIG. 1 (c)), by performing a degreasing treatment or the like.

In the degreasing treatment, for example, after the base tube 2 is washed with water, the base tube 2 is dried at 60 to 100 ° C. for 20 to 60 minutes to remove the release agent and the like attached to the surface of the base tube 2 using a thinner or the like. This is then done by drying it at 20 ° C. for 10 minutes.

If necessary, before performing the degreasing treatment, excess synthetic resin on the surface of the raw tube 2 is polished and removed using a scotch, sander or the like.

The second process for forming a coating film containing high-hardness fine particles on the outer peripheral surface of the raw tube 2 includes a paint application step, a re-pressurizing step, and a re-firing step.

In the paint application step, a paint obtained by mixing high-hardness fine particles in a resin of the same system as the synthetic resin impregnated in the above-described sheet prepreg is applied to the surface of the above-mentioned raw tube 2, and the coating film 3 is applied thereto. (Fig. 1
(D)).

As the high hardness fine particles, alumina, Si
It is desirable to use ceramic fine particles such as C, SiN, and zirconia. The high-hardness fine particles have a Vickers hardness of 550 or more, preferably 1200 or more, and an average particle size of 1 or more.
It is desirable that the diameter be in the range of from 60 μm to 60 μm and be spherical.

Solid lubricating powder is mixed into the above-mentioned resin as required. As the solid lubricating powder, a silicon resin powder, a trifluoride or tetrafluoride ethylene resin powder or the like is used alone or in combination of two or more. 0.3 to 125μ
m, preferably a solid lubricating powder having an average particle size of 10 to 40 μm.

Further, the above-mentioned resin may be used, if necessary,
Colorants are mixed in. As the colorant, an organic pigment, an inorganic pigment, a dye, a metal powder, an irregular reflection material, or the like is used.

As the organic pigment, a water-insoluble metal compound dye is used. Specifically, Hansa Yellow, Irgazine Yellow, Nova Balm Orange, Watching Red, Lake Red 4R, Shinkasha Red B, Dioxazine violet, copper phthalocyanine blue, copper phthalocyanine green, and the like are used.

As inorganic pigments, zinc, titanium, iron,
Compounds such as lead and chromium are used, specifically, graphite,
Use is made of graphite iron oxide, titanium yellow, cadmium yellow, molybdate orange, red iron, cadmium red, ultramarine, navy blue, cobalt blue, chromium oxide, cobalt green, cobalt purple, or the like.

Examples of the metal powder include pure gold powder, genuine silver powder, tin powder, tin pear, gold powder, pear, aluminum powder, aluminum pear, various kinds of gold lacquer powder, astroflake, erg, glitter, blue shell powder, Use plated glass powder or the like.

As the irregular reflection material, for example, mica pearl foil obtained by coating natural mica with titanium dioxide or iron oxide is used.

For applying the above-described resin to the surface of the raw tube 2, known means such as spraying, brushing, and squeezing are appropriately selected and applied.

In the re-pressurizing step, the core metal A is inserted again into the inside of the raw tube 2 having the above-described paint applied to the outer surface, and as shown in FIG. In this manner, the outer periphery of the coating film 3 is formed by winding a winding tape C as a re-pressing means at a predetermined pitch, in which a surface of a tape of nylon or the like is subjected to a release treatment such as silicon coating. Thus, the shape of the coating film 3 is controlled.

Of course, the re-pressing means is not limited to the above-mentioned winding of the tightening tape C, but may be performed by using a known re-pressing means such as a release-treated tube or a mold. The outer periphery of the coating film 3 may be covered and its shape may be controlled. However, when the winding tape C is used as the re-pressing means, irregularities having a predetermined pitch are formed on the outer peripheral surface of the laminated tube 1 in the axial direction of the laminated tube due to the winding of the winding tape C. Therefore, the contact area between the outer peripheral surface and the fishing line or the like is reduced, and as a result, the adhesion or damage of the fishing line or the like can be prevented.

The refiring step has the coating film 3 around it,
This is performed by heating and firing the repressurized raw tube 2 in a heating furnace.

In the initial stage of the refiring step, the applied resin is softened, and the synthetic resin impregnated in the prepreg forming the raw tube 2 is also slightly softened. Join.

When the heating in the refiring step is further continued, the synthetic resin impregnated in the prepreg forming the raw tube 2 is hardened together with the applied resin, and these two resins are integrally adhered and formed. You.

The refiring step is usually performed at a temperature of 120 to 160 ° C., as in the above firing step.
Performed for ~ 3 hours.

During the refiring step, the high-hardness fine particles and the solid lubricating powder mixed in the resin have a small amount of application, so that the fine particles and the solid lubricating powder need to be discharged together with the softened synthetic resin from between the winding tapes C. Therefore, the movement of the high-hardness fine particles and the solid lubricant powder is limited to the movement inside the tape.

After the completion of the re-firing step, the core metal A is removed from the raw tube 2 and the re-pressing means, that is, the winding tape C is removed. A uniformly exposed laminated tube 1 is obtained.
(F)).

Next, a description will be given of a second embodiment of the method for manufacturing a laminated tube according to the present invention.

The method for manufacturing a laminated tube according to the second embodiment of the present invention is similar to that of the above-described first embodiment of the present invention.
A first process for preparing the raw tube 2 and a second process for forming a coating film containing high-hardness fine particles on the outer peripheral surface of the raw tube 2 are included.

The first process is the same as the first process of the first embodiment described above, and the description is omitted.

A second process for forming a coating film containing high-hardness fine particles on the outer peripheral surface of the raw tube 2 includes a resin coating and semi-drying step, a high-hardness fine particle attaching step, a re-pressing step, And a refiring step.

The resin coating and semi-drying steps are shown in FIG.
As shown in (a), a resin of the same system as the synthetic resin impregnated in the sheet prepreg is applied to the surface of the raw tube 2 and is semi-dried to form a semi-dried coating film 3a thereon. It consists of things. Such semi-drying is 15-25 °
It is carried out by performing natural drying at a temperature of C for 30 to 60 minutes.

The step of adhering the high-hardness fine particles comprises adhering a mixed powder 3b composed of high-hardness fine particles, a solid lubricant and a colorant to the surface of the semi-dried coating film 3a. High hardness fine particles, solid lubricants and coloring agents
Since they are the same as those in the first embodiment, description thereof will be omitted.

The re-pressurizing step and the re-firing step include:
Since they are the same as those of the first embodiment, their description is omitted. However, when the re-pressurizing step is performed, the mixed powder 3b is embedded in the surface of the semi-dry coating film 3a.

After the completion of the re-firing step, the core metal is removed from the raw tube, and the re-pressing means, that is, the winding tape is removed. Thus, the high-hardness fine particles are uniformly exposed on the surface of the coating film. The obtained laminated tube is obtained.

[0079]

According to the method of the present invention described above, the outer peripheral surface of the base tube is coated with a coating material in which high hardness fine particles are mixed in a resin of the same system as the synthetic resin impregnated in the sheet prepreg, or A resin of the same type as the synthetic resin is applied to the outer peripheral surface of the base tube, semi-dried, and high-hardness fine particles are attached to the surface of the semi-dried coating film. Therefore, it is possible to provide a method for producing a lightweight laminated tube that does not generate blisters, has a simple finishing process, and can obtain uniform surface hardness, color, and water repellency.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view showing each step of a method for manufacturing a laminated tube of the present invention according to a first embodiment.

FIG. 2 is a schematic enlarged partial cross-sectional view showing a resin coating and semi-drying step and a step of attaching high-hardness fine particles in a method of manufacturing between layers according to a second embodiment of the present invention.

[Explanation of symbols]

 1: Laminated tube 2: Elementary tube 2a: Wound layer 3: Coating film 3a: Semi-dried coating film 3b: Mixed powder A: Core metal B: Tightening tape C: Tightening tape

Continued on the front page (51) Int.Cl. ⁶ Identification code FI B32B 5/00 B29C 67/14 K // B29L 31:52

Claims (5)

[Claims] 1. A sheet prepreg in which a reinforcing fiber is impregnated with a synthetic resin is wound around a core metal coated with a release agent, and the sheet prepreg is impregnated on the outer peripheral surface of a base tube which is pressure-fired by a conventional method. A method of manufacturing a laminated tube, comprising applying a coating material in which high-hardness fine particles are mixed to a resin of the same system as the synthetic resin obtained, and then firing the coating again by a conventional method. 2. A sheet prepreg obtained by impregnating a synthetic resin into a reinforcing fiber is wound on a core metal coated with a release agent, and the sheet prepreg is impregnated on the outer peripheral surface of a base tube which is fired by a conventional method under pressure. Applying a resin of the same system as that of the synthetic resin, semi-drying the resin, attaching high-hardness fine particles to the surface of the semi-dried coating film, and then sintering it again by a conventional method under pressure. Pipe manufacturing method. 3. The production of the laminated pipe according to claim 1, wherein a solid lubricating powder is mixed with the coating or adhered to the surface of the semi-dried coating film together with the high hardness fine particles. Method. 4. The method according to claim 1, wherein a colorant is mixed into the coating material or adhered to the surface of the semi-dried coating film together with the high hardness fine particles or the solid lubricant powder. 5. A method for manufacturing a laminated tube as described above. 5. The method according to claim 1, wherein the coating is applied or the semi-dried coating film is formed after the outer peripheral surface of the base tube is polished and finished.
5. A method for manufacturing a laminated tube as described above.