JP2018075763A - Method for manufacturing fiber-reinforced resin molded article and fiber-reinforced resin molded article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for producing a fiber-reinforced resin molded article and a fiber-reinforced resin molded article, capable of effectively suppressing an occurrence of cracks at an end of a fiber-reinforced part.SOLUTION: A method of manufacturing a fiber-reinforced resin molded article includes a bank arranging step S1, first and second arranging steps S2 and S8, first and second sealing steps S3 and S9, first and second introducing steps S5 and S11, first and second curing steps S6 and S12, first and second cutting steps S7 and S13. In the bank arranging step S1, an annular auxiliary member to be wound around a resin pipe is arranged. In the first and second arranging steps S2 and S8, a fiber reinforced sheet is arranged on an outer surface of the resin pipe. In the first and second sealing steps S3 and S9, the fiber reinforced sheet and the auxiliary member are sealed. In the first and second introducing steps S5 and S11, a matrix resin is introduced from an introduction part of the matrix resin until it gets over the auxiliary member. In the first and second curing steps S6 and S12, the matrix resin is cured. In the first and second cutting steps S7 and S13, the matrix resin is cut until the auxiliary member is exposed from an outer peripheral surface side of the auxiliary member.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a method for producing a fiber reinforced resin molded product in which a fiber reinforced sheet disposed so as to cover the outer peripheral surface of a resin tube is cured in a state of being impregnated with a matrix resin and the resin tube is reinforced, and the fiber reinforced resin molded product About.

  Fiber reinforced resin molded products are widely used in various fields because of their light weight and high strength. And as a manufacturing method of a fiber reinforced resin molded product, infusion molding excellent in consideration for the environment is used.

  For example, in Patent Document 1, in infusion molding in which an uncured resin is supplied and cured in a state where a fiber reinforced base material is coated on a resin tube, there is no generation of wrinkles, the appearance is good, and the strength is maintained. A method for joining cylindrical members and a method for forming a cylindrical molded body are disclosed.

JP 2011-79283 A

However, the conventional method has the following problems.
That is, in the method disclosed in the above publication, for example, when a general biaxial glass substrate (roving cloth) is used as a fiber reinforced substrate, glass fibers or the like are arranged in one of the three axes. Since there is no fiber base material, the end of the fiber reinforced base material tends to have a tapered thin shape.

In this case, when used as a fiber-reinforced resin molded product, cracks are likely to occur from the thin tapered end, and the strength of the reinforcing portion may be reduced.
In addition, there is a method of cutting the end portion of the fiber reinforced base material at a right angle. However, in this case, not only the fiber reinforced base material but also the resin pipe in the lower layer may be cut.

  In particular, if an operator who is not familiar with cutting work cuts the resin tube, there is a risk of cutting the resin tube by mistake. It becomes.

  The subject of this invention is providing the manufacturing method of the fiber reinforced resin molded product which can suppress effectively generation | occurrence | production of the crack in the edge part of a fiber reinforced part, and a fiber reinforced resin molded product.

  The manufacturing method of the fiber reinforced resin molded article which concerns on 1st invention is arrange | positioned so that the outer surface of the cylindrical resin tube formed with the thermoplastic resin and the resin tube may be covered, and thermosetting resin and thermosetting A method for manufacturing a fiber reinforced resin molded article comprising a fiber reinforced portion including a reinforced fiber disposed in a functional resin, a bank placement step, a placement step, a sealing step, an introduction step, and a curing step And a cutting process. In the bank placement process, an annular auxiliary member that is wound around the resin pipe is placed near the end of the fiber reinforced sheet that serves as the base material for the fiber reinforced part on the outer surface of the resin pipe. To do. In the arranging step, a fiber reinforced sheet is arranged on the outer surface of the resin tube. In the sealing step, the fiber reinforced sheet and the auxiliary member arranged on the outer surface in the arranging step are sealed. In the introducing step, the matrix resin impregnated in the fiber reinforced sheet is introduced into the space sealed in the sealing step from a predetermined introducing portion until it gets over the auxiliary member. In the curing step, the matrix resin introduced into the space in the introducing step is cured. In the cutting step, the matrix resin is cut at the position where the auxiliary member is wound until the auxiliary member is exposed along the direction substantially perpendicular to the outer surface of the resin tube from the outer peripheral surface side of the auxiliary member.

  Here, in a manufacturing method of a fiber reinforced resin molded product reinforced by covering the outer surface of a cylindrical resin tube with a fiber reinforced portion, an auxiliary member is wound around the resin tube and sealed before introducing the matrix resin. After that, an uncured matrix resin is introduced until it gets over the auxiliary member. Then, after the matrix resin is cured, the matrix resin is cut along the direction substantially perpendicular to the outer surface of the resin tube from the outer peripheral surface side of the auxiliary member until the auxiliary member is exposed.

  Here, the auxiliary member is an annular member wound around the outer surface of the resin tube so that the angle of the end face of the fiber reinforced portion is in a predetermined range, and the range of the angle of the end face is, for example, , 80 degrees or more.

And in the cutting process which forms the end surface of a fiber reinforcement part so that it may become the said angle, it cuts by making a cutting blade approach at a substantially right angle with respect to the outer surface of a resin pipe from the outer surface side of an auxiliary member.
In addition, when cutting until an auxiliary member is exposed in a cutting process, a part of the outer peripheral surface side of the auxiliary member may be cut.

  As a result, the uncured matrix resin introduced in the introducing step is blocked by the height of the auxiliary member, and the matrix resin is introduced and cured until it gets over the auxiliary member. Then, by cutting from the outer peripheral surface side of the auxiliary member until the auxiliary member is exposed, the portion of the matrix resin blocked by the auxiliary member and the cut portion have the desired angle of the fiber reinforced portion Formed as.

Therefore, at the end portion of the fiber reinforced portion, an end portion having a desired angle can be formed without being cut to the surface of the resin tube, and the matrix resin spreads in a taper shape and is cured while being thinned. This can be suppressed.
As a result, it is possible to manufacture a fiber reinforced resin molded product that is less likely to be cracked from the end of the fiber reinforced portion disposed so as to cover the outer surface of the resin tube.

  A method for manufacturing a fiber-reinforced resin molded product according to the second invention is a method for manufacturing a fiber-reinforced resin molded product according to the first invention, wherein the fiber-reinforced sheet is formed by laminating sheet-like fibers. Yes.

Here, the resin tube is reinforced using a fiber reinforced sheet formed by laminating sheet-like fibers.
Thereby, the desired part of a resin pipe can be effectively reinforced using the fiber reinforced sheet containing a plurality of sheet-like fibers.

  The method for producing a fiber-reinforced resin molded product according to the third invention is a method for producing a fiber-reinforced resin molded product according to the first or second invention, wherein the auxiliary member is 1.0 mm or more from the surface of the resin tube. The thickness of the fiber reinforced sheet is 90% or less.

Here, the height of the auxiliary member wound around the outer surface of the resin tube is formed within a predetermined range.
Here, if the height of the auxiliary member is higher than a predetermined range, the matrix resin may not easily get over the auxiliary member during molding.

  On the other hand, when the height of the auxiliary member is lower than the predetermined range, the matrix resin also spreads thinly at the time of molding, and the end of the fiber reinforced portion tends to be tapered and thin. Further, when the matrix resin is cured and then cut from the outer peripheral surface side of the auxiliary member until the auxiliary member is exposed, the resin pipe may be cut.

  Thereby, by using the auxiliary member formed so as to be in the above range, the matrix resin can be cured in a state of overcoming the auxiliary member appropriately. Furthermore, it is possible to prevent the surface of the resin tube from being cut while suppressing the end portion of the fiber reinforced portion from being thinned.

  A method for manufacturing a fiber-reinforced resin molded product according to a fourth invention is a method for manufacturing a fiber-reinforced resin molded product according to any one of the first to third inventions, wherein the auxiliary member is a shaft of a resin tube. It has a through hole formed along the center direction.

Here, a through hole is formed in the auxiliary member wound around the outer surface of the resin tube along the axial direction of the resin tube.
Here, the matrix resin introduced in the introduction step is blocked by the auxiliary member and is introduced until it gets over the auxiliary member. At this time, the matrix resin moves to the side over the auxiliary member through the through hole formed in the auxiliary member along the axial direction. In addition, the through-hole formed in the auxiliary member may be single or plural.

Thereby, the matrix resin can be smoothly introduced to the side over the auxiliary member by moving the matrix resin over the auxiliary member to the side over the auxiliary member through the through hole.
As a result, even when the matrix resin is cut from the outer peripheral surface side of the auxiliary member during the cutting process, an end surface having a desired angle can be formed at the end of the fiber reinforced portion.

  A method for manufacturing a fiber-reinforced resin molded product according to a fifth invention is a method for manufacturing a fiber-reinforced resin molded product according to any one of the first to fourth inventions, wherein the auxiliary member is more than a resin tube. It is made of a soft material.

Here, as an auxiliary member wound around the outer surface of the resin tube, a member formed using a material softer than the resin tube is used.
Thereby, while being able to make it easy to cut an auxiliary member in a cutting process, the operation | work which winds an auxiliary member around the outer surface of a resin pipe becomes easy.

  A manufacturing method of a fiber reinforced resin molded product according to a sixth invention is a manufacturing method of a fiber reinforced resin molded product according to the fifth invention, wherein the auxiliary member is made of any one of rubber, urethane, and silicon. It is formed using.

Here, the auxiliary member is formed of an elastic material such as rubber, urethane, or silicon.
This makes it possible to easily wind the auxiliary member around the outer surface of the resin tube and to form the end face of the above-described fiber reinforced resin using an auxiliary member made of a material that does not adversely affect the matrix resin.

  A manufacturing method of a fiber reinforced resin molded product according to a seventh invention is a manufacturing method of a fiber reinforced resin molded product according to any one of the first to sixth inventions, wherein the auxiliary member reacts with the matrix resin. The resin is not used.

Here, the auxiliary member is formed of a material that does not chemically react with the uncured matrix resin introduced by the resin introduction device.
Here, as the material of the auxiliary member, for example, rubber that does not react with the matrix resin formed of a thermosetting resin can be used.

  Thereby, when the matrix resin is introduced and cured, it is possible to suppress the matrix resin from reacting with the auxiliary member and becoming difficult to form the end face having the predetermined angle.

  A fiber-reinforced resin molded article according to an eighth aspect includes a cylindrical resin tube formed of a thermoplastic resin, a fiber-reinforced portion, and an end surface. The fiber reinforced portion is arranged so as to cover the outer surface of the resin tube, and includes a thermosetting resin and a reinforcing fiber arranged in the thermosetting resin. The end surface is provided at an end portion of the fiber reinforced portion disposed so as to cover the resin tube, and is disposed so as to have an angle of 80 degrees or more with respect to the outer surface of the resin tube.

  Here, in the fiber reinforced resin molded product reinforced by covering the outer surface of the cylindrical resin tube with the fiber reinforced portion, the end surface of the fiber reinforced portion is at a predetermined angle (80 degrees or more) with respect to the outer surface of the resin tube. ).

  Here, the end face of the above-mentioned angle is obtained by, for example, blocking and curing the uncured thermosetting resin by an auxiliary member wound around the resin pipe in the manufacturing process of the fiber reinforced resin molded product. It is formed.

Thereby, sufficient thickness is securable in the edge part of a fiber reinforcement part, without thinning.
Therefore, since generation | occurrence | production of the crack in the edge part of a fiber reinforced part can be suppressed effectively, the strength reduction of the part reinforced with the fiber reinforced part can be prevented effectively.

  According to the method for manufacturing a fiber-reinforced resin molded product according to the present invention, it is possible to effectively suppress the occurrence of cracks at the end of the fiber-reinforced portion.

The perspective view which shows the structure of the resin pipe containing the main pipe and branch pipe used as the base part of the fiber reinforced resin molded product which concerns on one Embodiment of this invention. The perspective view which shows the state at the time of a fiber reinforced sheet being wound around the resin pipe | tube of FIG. The perspective view which shows the overlapping state of the fiber reinforced sheet wound by the resin pipe | tube shown in FIG. (A) is a top view which shows the overlap part in the state by which the fiber reinforced sheet was wound around the resin pipe | tube of FIG. (B) is the side view. The enlarged view of A part of FIG.4 (b). The top view which shows the structure of the infusion molding system for manufacturing the fiber reinforced resin molded product shown to Fig.4 (a) etc. FIG. The top view which shows the state which has arrange | positioned the auxiliary member to the outer surface of the resin pipe at the time of manufacture of the fiber reinforced resin molded product shown to Fig.4 (a). The flowchart which shows the flow of the manufacturing method of the fiber reinforced resin molded product shown to Fig.4 (a). Sectional drawing which shows the introduction state of the matrix resin introduce | transduced in the 1st, 2nd introduction process of FIG. (A), (b) is sectional drawing which shows the flow which performs the cutting in a cutting process with respect to sectional drawing of FIG. Sectional drawing which shows the state in which the desired end surface was formed in the edge part of a fiber reinforcement part after the cutting process shown in FIG.10 (b). The perspective view which shows the structure of the substantially L-shaped resin pipe used as the base of the fiber reinforced resin molded product which concerns on other embodiment of this invention. The top view which shows the structure of the infusion molding system for manufacturing the fiber reinforced resin molded product which concerns on other embodiment of this invention.

The fiber-reinforced resin molded product 30, its manufacturing method, and manufacturing apparatus according to an embodiment of the present invention will be described below with reference to FIGS. 1 to 11.
(Fiber-reinforced resin molded product 30)
The fiber reinforced resin molded product 30 according to the present embodiment impregnates a part of the outer surface of the branch pipe (resin pipe) 10 shown in FIG. 1 with the fiber reinforced sheets 21a to 21d and 22a to 22d shown in FIG. It is fixed so as to cover in a state of being made to be used as a joint.

As shown in FIG. 1, the branch pipe 10 is a resin pipe having a substantially T shape in plan view, and constitutes a base portion of the fiber reinforced resin molded product 30.
The detailed configuration of the branch pipe 10 will be described in detail later.

As shown in FIG. 2, the fiber reinforced portions 21 and 22 are provided to reinforce the branch portion in the branch pipe 10. Then, the fiber reinforced portions 21 and 22 are formed by curing each of the four fiber reinforced sheets 21a to 21d and the fiber reinforced sheets 22a to 22d with a matrix resin 50 (see FIG. 9 or the like) impregnated later. Has been.
The detailed configuration of the fiber reinforced portions 21 and 22 will be described in detail later.

(Branch pipe 10)
The branch pipe 10 is, for example, a cylindrical resin pipe having a diameter of 300 mm to 1500 mm, and includes a cylindrical main pipe 11 and a cylindrical branch pipe 12 as shown in FIG.

  The material of the branch pipe 10 is not particularly limited as long as it is a resin. For example, thermoplastic resins such as polyolefin (polyethylene, polypropylene, etc.) and polyvinyl chloride can be used.

The main pipe 11 is a part that functions as a main pipe part in the branch pipe 10, and is disposed along a substantially horizontal direction in FIG. 1 and has an axis X1.
The branch pipe 12 is a branch pipe portion formed so as to branch from a substantially central portion in the longitudinal direction of the main pipe 11, and is arranged along a substantially vertical direction in FIG. 1 and has an axis X2. Yes.

  Here, as shown in FIG. 1, in the resin pipe shaped like the branch pipe 10 including the branch pipe 12 branched from the main pipe 11, the strength in the vicinity of the connecting portion between the main pipe 11 and the branch pipe 12 is reinforced. It may be required to do.

  In the branch pipe 10, when the surface including the axis X1 of the main pipe 11 and the axis X2 of the branch pipe 12 is a center plane D, the outer surface reinforced by the fiber reinforced sheets 21a to 21d and 22a to 22d in the branch pipe 10 is The region is divided into two regions by the center plane D. The outer surface of the branch pipe 10 divided into two includes one outer surface (first covering surface) 13a and the other outer surface (second covering surface) 13b (dot portion in FIG. 2). Configured as follows.

  Therefore, in the fiber reinforced resin molded product 30 of the present embodiment, one outer surface 13a is fixed so as to be covered with the fiber reinforced portion 21, and the other outer surface 13b is fixed so as to be covered with the fiber reinforced portion 22. Is done.

(Fiber reinforced parts 21, 22)
As shown in FIG. 2, the fiber reinforced portions 21 and 22 are formed by impregnating the fiber reinforced sheets 21 a to 21 d and 22 a to 22 d containing fibers with a matrix resin 50 (see FIG. 9 and the like) to be described later. Is hardened to strengthen the connecting portion between the main pipe 11 and the branch pipe 12 in the branch pipe 10. That is, the fiber reinforced sheets 21 a to 21 d and 22 a to 22 d serve as base materials for the fiber reinforced portions 21 and 22.

Each of the fiber reinforced sheets 21a to 21d and the fiber reinforced sheets 22a to 22d is configured by combining four substantially rectangular sheet-like members.
In addition, as a fiber contained in the fiber reinforced sheets 21a-21d and 22a-22d, a glass fiber can be used, for example. Further, the fiber reinforced sheets 21a to 21d and 22a to 22d may be woven fabrics or non-woven fabrics.

  The fiber reinforced portion 21 reinforces one outer surface of the branch pipe 10 by being fixed so as to cover the outer surface 13a side of the outer surface of the branch pipe 10 described above. As shown in FIG. 2, the fiber reinforced portion 21 includes a fiber reinforced sheet 21 a that is fixed so as to cover the branch pipe 12 portion, and three fiber reinforced sheets 21 b that are fixed so as to cover the main pipe 11 portion. 21d.

  The fiber reinforced sheet 21a is a substantially rectangular sheet containing glass fibers, and is configured by laminating a plurality of glass fiber sheets. And the fiber reinforced sheet 21a is initially covered on the outer surface of the branch pipe 10 among the four fiber reinforced sheets 21a to 21d in the manufacturing process described later. More specifically, as shown in FIG. 3, the fiber reinforced sheet 21 a is disposed on the side of the branch pipe 12 in the vicinity of the connecting portion between the main pipe 11 and the branch pipe 12.

  The fiber reinforced sheet 21b is configured by laminating a plurality of glass fiber sheets, similarly to the fiber reinforced sheet 21a. And the fiber reinforced sheet | seat 21b is a substantially rectangular sheet | seat containing glass fiber, Comprising: In the manufacturing process mentioned later, it covers on the outer surface of the branch pipe 10 2nd among the four fiber reinforced sheets 21a-21d. . More specifically, as shown in FIG. 3, the fiber reinforced sheet 21 b is disposed on the main pipe 11 side in the vicinity of the connecting portion between the main pipe 11 and the branch pipe 12 and on the left side in FIG. 2.

  The fiber reinforced sheet 21c is configured by laminating a plurality of glass fiber sheets, similarly to the fiber reinforced sheet 21a. And the fiber reinforced sheet | seat 21c is a substantially rectangular sheet | seat containing glass fiber, Comprising: In the manufacturing process mentioned later, it covers on the outer surface of the branch pipe 10 3rd among the four fiber reinforced sheets 21a-21d. . More specifically, as shown in FIG. 3, the fiber reinforced sheet 21 c is arranged on the main pipe 11 side in the vicinity of the connecting portion between the main pipe 11 and the branch pipe 12, and on the right side in FIG. 2.

  The fiber reinforced sheet 21d is configured by laminating a plurality of glass fiber sheets, similarly to the fiber reinforced sheet 21a. And the fiber reinforced sheet | seat 21d is a substantially rectangular sheet | seat containing glass fiber, Comprising: In the manufacturing process mentioned later, among the four fiber reinforced sheets 21a-21d, the outer surface (main pipe | tube 11 and last) (Near the connecting portion with the branch pipe 12). More specifically, as shown in FIGS. 2 and 3, the fiber reinforced sheet 21d is disposed on the connecting portion between the main pipe 11 and the branch pipe 12 and at a position directly below the branch pipe 12 in FIG. The

In addition, the part (overlapping part 23a-23c) mutually overlap | superposed is formed in the part which each fiber reinforced sheet | seats 21a-21d mutually adjoin, as shown to Fig.4 (a).
As shown in FIG. 4A, the overlapping portion 23 a has an end portion of the fiber reinforced sheet 21 d arranged last on the fiber reinforced sheet 21 a arranged first on the outer surface of the branch pipe 10. It is a part arranged to match.

  As shown in FIG. 4A, the overlapping portion 23 b has an end portion of the fiber reinforced sheet 21 d arranged last on the fiber reinforced sheet 21 b arranged second on the outer surface of the branch pipe 10. It is a part arranged so as to overlap.

  As shown in FIG. 4A, the overlapping portion 23c is arranged on the outer surface of the branch pipe 10 so that the end portion of the fiber reinforced sheet 21d overlaps the third fiber reinforced sheet 21c. Part.

  The fiber reinforced portion 22 reinforces the other outer surface of the branch pipe 10 by being fixed so as to cover the outer surface 13b side of the outer surface of the branch pipe 10 described above. As shown in FIG. 2, the fiber reinforced portion 22 includes a fiber reinforced sheet 22a that is fixed so as to cover the branch pipe 12 portion, and three fiber reinforced sheets 22b that are fixed so as to cover the main pipe 11 portion. 22d.

  In the fiber reinforced resin molded product 30 of the present embodiment, after the fiber reinforced sheets 21a to 21d described above are fixed on the outer surface 13a, the fiber reinforced sheets 22a to 22d are covered on the outer surface 13b. In this state, the matrix resin 50 is impregnated and fixed on the outer surface 13b.

  The fiber reinforced sheet 22a is a substantially rectangular sheet containing glass fibers, and is configured by laminating a plurality of glass fiber sheets. And the fiber reinforced sheet 22a is first covered on the outer surface of the branch pipe 10 among four fiber reinforced sheets 22a-22d in the manufacturing process mentioned later. More specifically, the fiber reinforced sheet 22a is disposed on the side of the branch pipe 12 in the vicinity of the connecting portion between the main pipe 11 and the branch pipe 12, similarly to the fiber reinforced sheet 21a.

  The fiber reinforced sheet 22b is configured by laminating a plurality of glass fiber sheets in the same manner as the fiber reinforced sheet 22a. And the fiber reinforced sheet | seat 22b is a substantially rectangular sheet | seat containing glass fiber, Comprising: In the manufacturing process mentioned later, it covers on the outer surface of the branch pipe 10 2ndly among the four fiber reinforced sheets 22a-22d. . More specifically, the fiber reinforced sheet 22b is disposed on the main pipe 11 side in the vicinity of the connecting portion between the main pipe 11 and the branch pipe 12, similarly to the fiber reinforced sheet 21b.

  The fiber reinforced sheet 22c is configured by laminating a plurality of glass fiber sheets in the same manner as the fiber reinforced sheet 22a. And the fiber reinforced sheet | seat 22c is a substantially rectangular sheet | seat containing glass fiber, Comprising: In the manufacturing process mentioned later, it covers on the outer surface of the branch pipe 10 3rd among the four fiber reinforced sheets 22a-22d. . More specifically, the fiber reinforced sheet 22c is disposed on the main pipe 11 side in the vicinity of the connecting portion between the main pipe 11 and the branch pipe 12, similarly to the fiber reinforced sheet 21c.

  The fiber reinforced sheet 22d is configured by laminating a plurality of glass fiber sheets in the same manner as the fiber reinforced sheet 22a. And the fiber reinforced sheet 22d is a substantially rectangular sheet containing glass fibers, and in the manufacturing process to be described later, the outer surface of the branch pipe 10 (the main pipe 11 and the last) among the four fiber reinforced sheets 22a to 22d. (Near the connecting portion with the branch pipe 12). More specifically, the fiber reinforced sheet 22d is disposed on the connecting portion between the main pipe 11 and the branch pipe 12 in the same manner as the fiber reinforced sheet 21d.

  In addition, although detailed description is abbreviate | omitted, in the part which each fiber reinforced sheet | seat 22a-22d mutually adjoins, the part which mutually overlap | superposed is formed similarly to the part which the fiber reinforced sheet | seats 21a-21d mutually adjoined. Shall.

  Here, as described above, the fiber reinforced sheets 22a to 22d are fixed on the remaining outer surface 13b after the fiber reinforced sheets 21a to 21d are fixed on the outer surface 13a divided into two.

  At this time, in the state where the fiber reinforced sheets 21a to 21d and 22a to 22d are fixed to the outer surface of the branch pipe 10, as shown in FIG. 4B, overlapping portions (overlapping portion 24a) are formed. The

  As shown in FIG. 4B, the overlapping portion (first overlapping portion) 24a has a central plane D including the axis X1 of the main pipe 11 and the axis X2 of the branch pipe 12 and the outer surface of the branch pipe 10. In the boundary part of the outer surface 13a, 13b which cross | intersects, it arrange | positions so that the edge part of the fiber reinforced sheet | seat 22a may overlap on the fiber reinforced sheet | seat 21a. And the overlap part 24a becomes a free end of the fiber reinforced sheet 21a and the fiber reinforced sheet 22a when performing infusion molding (see FIG. 6) described later.

  In the present embodiment, as a method for fixing the above-described fiber reinforced sheets 21a to 21d and 22a to 22d to the outer surface of the branch pipe 10, the matrix resin 50 is used as the fiber reinforced sheet by using an infusion molding system 40 described later. A method of impregnating 21a to 21d and 22a to 22d and curing is used.

  Moreover, as shown in FIG.4 (b), the fiber reinforced resin molded product 30 of this embodiment is provided in the edge part on the opposite side to the overlap parts 23a-23c in the fiber reinforced sheets 21a-21c and 22a-22c. An end face 25 is provided.

In addition, the end surface 25 which has the respectively substantially same shape is provided in the edge part on the opposite side to the overlapping parts 23a-23c in fiber reinforcement sheet | seats 21a-21c and 22a-22c.
Here, as one of these end surfaces 25, the end surface 25 of the fiber reinforced sheet 21a fixed on the outer surface 13a of the branch pipe 12 will be described as an example.

As shown in FIG. 5, the end face 25 is formed at the end of the fiber reinforced sheet 21 a at a predetermined angle α with respect to the outer surface 13 a of the branch pipe 10.
Here, the predetermined angle α is set to be 80 degrees or more.

  Thereby, sufficient thickness can be ensured, without the edge part of the fiber reinforced sheet | seat 21a becoming thin. Therefore, generation | occurrence | production of the crack in the edge part of the fiber reinforced sheet | seat 21a can be suppressed effectively.

As a result, it is possible to effectively prevent the strength reduction of the portion reinforced by the fiber reinforced sheet 21a.
In addition, the method of forming the end surface 25 having a predetermined angle α with respect to the outer surfaces 13a and 13b of the main pipe 11 and the branch pipe 12 will be described in detail in the description of the subsequent manufacturing method.

(Infusion molding system 40)
As shown in FIG. 6, the infusion molding system 40 includes an airtight film 41, sealing materials 42 a and 42 b, a resin introduction device 43, a decompression device 44, auxiliary members 45 a, 45 b and 45 c, and a spiral member 47. .

  The airtight film 41 is used to cover a range including the auxiliary members 45a to 45c on the outer surface of the branch pipe 10 in a state covered with the fiber reinforced sheets 21a to 21d and 22a to 22d.

Thereby, the space between the outer surfaces 13 a and 13 b formed by the airtight film 41 can be decompressed by the decompression device 44.
As shown in FIG. 6, the sealing material 42 a seals the space between the airtight film 41 and the outer surfaces 13 a and 13 b of the branch pipe 10 covered with the airtight film 41. And at the inlet side provided at a total of three locations at the end of the branch pipe 12.

  The sealing material 42 b is an introduction portion provided for introducing the matrix resin 50 into the space between the airtight film 41 and the outer surfaces 13 a and 13 b of the branch pipe 10 covered with the airtight film 41. It is arranged on the exhaust port side. And the sealing material 42b seals the space between the outer surfaces 13a and 13b of the branch pipe 10 covered with the airtight film 41 while the matrix resin 50 is not introduced. And the sealing material 42b is arrange | positioned so that the circumference | surroundings of the exhaust port provided in the approximate center of the main pipe 11 may be covered, as shown in FIG.

  The resin introduction device 43 is formed between the airtight film 41 and the outer surfaces 13a and 13b of the branch pipe 10 covered with the airtight film 41 in the manufacturing method (infusion molding) of the fiber reinforced resin molded product 30 described later. The matrix resin 50 is introduced in a state where the space is decompressed.

Here, as the matrix resin 50 introduced by the resin introduction device 43, for example, a thermosetting resin such as an unsaturated polyester resin can be used.
As shown in FIG. 6, three decompression devices 44 are provided so as to correspond to the suction ports provided at a total of three locations, both ends of the main pipe 11 and the ends of the branch pipe 12. The decompression device 44 has the airtight film 41 and the outer surfaces 13a and 13b of the branch pipe 10 covered with the airtight film 41 before introducing the matrix resin 50 through the respective suction ports. The space between is depressurized.

At this time, the space between the airtight film 41 and the outer surfaces 13a and 13b of the branch pipe 10 covered with the airtight film 41 is sealed by the sealing materials 42a and 42b.
Therefore, the decompression device 44 includes the fiber reinforced sheets 21a to 21d and 22a to 22d disposed in the space between the airtight film 41 and the outer surfaces 13a and 13b of the branch pipe 10 covered with the airtight film 41. It can be made the state affixed on the outer surfaces 13a and 13b.

  The auxiliary members 45a, 45b, and 45c are annular members wound around the outer peripheral surfaces of the main pipe 11 and the branch pipe 12, and are formed of rubber that is softer and more elastic than the main pipe 11 and the branch pipe 12. . And as for the auxiliary members 45a-45c, the end surface 25 formed in the edge part of the fiber reinforcement parts 21 and 22 (fiber reinforcement sheet | seats 21a-21c, 22a-22c) of the fiber reinforced resin molded product 30 is the main pipe 11 and the branch pipe. It is used to form a desired angle (80 degrees or more) with respect to the twelve outer surfaces 13a and 13b.

  Specifically, as shown in FIG. 7, the auxiliary members 45a, 45b, and 45c are provided at a total of three locations, that is, both ends of the main pipe 11 and ends of the branch pipe 12 opposite to the connecting portion with the main pipe 11. Is provided. The auxiliary members 45a, 45b, and 45c are arranged along the circumferential direction on the outer peripheral surfaces of the main pipe 11 and the branch pipe 12, respectively.

  The auxiliary members 45a, 45b and 45c have a thickness d2 (height from the outer surfaces 13a and 13b) of 1.0 mm or more and 90% or less of the thickness d1 of the fiber reinforced sheets 21a, 21b and 21c. (See FIG. 9).

  As a result, the auxiliary members 45a, 45b, 45c are provided at the predetermined positions with the matrix resin 50 and the ends of the fiber reinforced sheets 21a-21c, 22a-22c introduced in an uncured state once in a predetermined position. Can be dammed up.

  Then, the matrix resin 50 is further introduced from the resin introduction device 43, whereby the matrix resin 50 is introduced to a position over the auxiliary members 45a to 45c (see FIG. 9).

  The auxiliary members 45a to 45c are covered with the matrix resin 50 by the cutting blade 51 (see FIG. 10A, etc.) in steps S7 and S13 (first and second cutting steps) included in the manufacturing process described later. It is cut until the broken part is exposed.

  Thereby, the end portions of the matrix resin 50 and the fiber reinforced sheets 21a to 21c and 22a to 22c cut off in steps S7 and S13 (first and second cutting steps) are blocked by the auxiliary members 45a to 45c. End surfaces 25 substantially perpendicular to the surfaces 13a and 13b can be formed, respectively.

That is, the end face 25 has the predetermined angle α (80 degrees or more) described above.
Further, the auxiliary members 45a to 45c have a thickness d2 (height from the outer surfaces 13a, 13b) of 1.0 mm or more and 90% or less of the thickness d1 of the fiber reinforced sheets 21a, 21b, 21c. (See FIG. 9).

  Here, when the thickness d2 of the auxiliary members 45a to 45c exceeds 90% of the thickness d1 of the fiber reinforced sheets 21a to 21c, the matrix resin 50 becomes difficult to get over the auxiliary members 45a to 45c at the time of molding. It may be difficult to introduce the matrix resin 50 until the state shown in FIG.

  On the other hand, when the thickness d2 of the auxiliary members 45a to 45c is less than 1.0 mm, the end surface 25 cannot be formed by blocking the matrix resin 50 when the matrix resin 50 is introduced. For this reason, the matrix resin 50 spreads thinly, and the end portion of the fiber reinforced portion 21 tends to be tapered and thin.

  In addition, after the matrix resin 50 is cured, when cutting from the outer peripheral surface side of the auxiliary members 45a to 45c until the auxiliary members 45a to 45c are exposed, the outer surfaces 13a and 13b of the main pipe 11 and the branch pipe 12 are cut. There is a risk that.

  Thereby, by using the auxiliary members 45a to 45c formed so as to be in the above range, the matrix resin 50 can be cured in a state of overcoming the auxiliary members 45a to 45c appropriately. Furthermore, it can prevent that the outer surface 13a, 13b of the main pipe 11 and the branch pipe 12 will be cut, suppressing that the edge part of the fiber reinforcement part 21 becomes thin.

Further, the auxiliary members 45a to 45c are formed of rubber as described above.
This prevents the matrix resin 50 made of unsaturated polyester resin or the like from reacting with the rubber of the auxiliary members 45a to 45c, thereby avoiding adverse effects on the matrix resin 50 blocked by the auxiliary members 45a to 45c. can do.

Further, since the auxiliary members 45a to 45c are made of a softer rubber than the main pipe 11 and the branch pipe 12, there is an advantage that it is easy to cut in a cutting process described later.
Further, since the auxiliary members 45a to 45c are made of an elastic material (rubber), as shown in FIG. 7, when being wound around the main surface 11 of the branch pipe 10 and the outer surfaces 13a and 13b of the branch pipe 12, In addition, the auxiliary members 45a to 45c can be attached to a predetermined position while being extended.

Moreover, since the outer surfaces 13a and 13b can be tightened by the elasticity of rubber, leakage of the uncured matrix resin 50 and the like can be prevented.
In addition, the auxiliary members 45a-45 should just function in order to stop the movement of the edge part of the fiber reinforcement sheets 21a-21c, 22a-22c, and the part containing only the matrix resin 50 is formed in the taper shape. May be.

Further, in the present embodiment, the auxiliary members 45a to 45c are formed with a plurality of through holes 46 (see FIG. 9 and the like) formed along the directions of the axes X1 and X2 of the main pipe 11 and the branch pipe 12.
A plurality of through holes 46 are provided in the circumferential direction in the annular auxiliary members 45 a to 45 c wound around the outer surfaces of the main pipe 11 and the branch pipe 12.

  As a result, it is possible to form a state in which the matrix resin 50 introduced from the resin introduction device 43 into the sealed space is smoothly introduced to the position over the auxiliary members 45a to 45c.

  As shown in FIG. 6, the spiral member 47 is arranged in a substantially T shape in plan view, and promotes the movement of the matrix resin 50 introduced from the resin introduction device 43 in a desired direction. Is provided.

  Accordingly, the matrix resin 50 introduced from the resin introduction device 43 can be guided by the spiral member 47 so as to flow in the three directions in which the decompression device 44 is installed (two-dot chain arrows in FIG. 6). Direction).

Thereby, the matrix resin 50 is sufficiently impregnated in the fiber reinforced sheets 21a to 21d and 22a to 22d, and can be in a state of overcoming the auxiliary members 45a to 45c.
In addition, the manufacturing method of the fiber reinforced resin molded product 30 using the infusion molding system 40 will be described in detail below.

<Method for producing fiber-reinforced resin molded product 30>
It will be as follows if the manufacturing method of the fiber reinforced resin molded product 30 of this embodiment is demonstrated using FIGS.

  9 to 11 show the cutting process of the auxiliary member 45a at the end of the fiber reinforced sheet 21a, the auxiliary members 45b and 45c at the ends of the other fiber reinforced sheets 21b and 21c. The cutting process is also performed in the same manner.

The fiber reinforced resin molded product 30 of this embodiment is manufactured according to the flowchart shown in FIG. 8 using the infusion molding system 40 shown in FIG.
That is, in step S1, auxiliary members 45a to 45c (see FIG. 7) are attached to the positions of the ends of the main pipe 11 and the branch pipe 12 on the outer surface of the branch pipe 10 set to a predetermined position in the infusion molding system 40. (Bank placement process).

  Here, the auxiliary members 45 a to 45 c are attached to positions (ends where the end face 25 is formed) that are the ends of the fiber reinforced sheets 21 a to 21 c and 22 a to 22 c on the outer surfaces of the main pipe 11 and the branch pipe 12.

  Next, in step S2, on the outer surface of the branch pipe 10, four sheets serving as base materials for the fiber reinforced portions 21 and 22 on one region (outer surface 13a) divided into two regions by the center plane D. Fiber-reinforced sheets 21a to 21d are arranged (first arrangement step).

  Here, the four fiber reinforced sheets 21a to 21d and 22a to 22d include glass fibers in which a plurality of sheets are laminated, and the fiber reinforced portions 21 and 22 before being cured by being impregnated with the matrix resin 50 are cured. It is a substrate.

  Next, in step S3, the region of the branch pipe 10 in which the four fiber reinforced sheets 21a to 21d, 22a to 22d and the auxiliary members 45a to 45c are arranged on the outer surface 13a is defined as an airtight film 41 and a sealing material 42a. , 42b (first sealing step).

  Next, in step S4, the airtight film 41 and the outer surface 13a of the branch pipe 10 covered with the airtight film 41 are connected using the three decompression devices 44 through the suction ports provided at three locations. The space between them is decompressed (first decompression step).

  Next, in step S5, the matrix resin 50 is introduced into the space between the airtight film 41 in a decompressed state and the outer surface 13a of the branch pipe 10 covered with the airtight film 41 (first introduction step). ).

  As a result, the fiber reinforced sheets 21a to 21d and 22a to 22d are impregnated with the matrix resin 50. In the vicinity of the ends of the fiber reinforced sheets 21a to 21c and 22a to 22c, the fiber reinforced sheets 21a to 21c, 22a to 22c and the matrix resin 50 are once blocked by the auxiliary members 45a to 45c, and the matrix resin 50 Is introduced to a position over the auxiliary members 45a to 45c.

Here, as shown in FIG. 9 and the like, the auxiliary members 45a to 45c are formed with a plurality of through holes 46 formed in parallel to the directions of the axes X1 and X2 of the main pipe 11 and the branch pipe 12, respectively.
A plurality of through holes 46 are provided in the circumferential direction in the annular auxiliary members 45 a to 45 c wound around the outer surfaces of the main pipe 11 and the branch pipe 12.

  Thereby, it is possible to easily form a state in which the matrix resin 50 introduced into the sealed space from the resin introduction device 43 is introduced to a position over the auxiliary members 45a to 45c.

At this time, the introduced matrix resin 50 is formed of a material that does not cause a chemical reaction with the auxiliary members 45a to 45c.
Therefore, when the matrix resin 50 is introduced, the matrix resin 50 does not react with the auxiliary members 45a to 45c.

Next, in step S6, the matrix resin 50 impregnated in the four fiber reinforced sheets 21a to 21d and 22a to 22d is cured (first curing step).
Here, when the matrix resin 50 is cured, heat may or may not be applied depending on the curing temperature and properties of the matrix resin 50.

  Thereby, the space in the airtight film 41 is decompressed in the decompression step, and the fiber reinforced sheets 21a to 21d and 22a to 22d are in close contact with the outer surface 13a of the branch pipe 10 without wrinkles. The matrix resin 50 impregnated in 21a to 21d and 22a to 22d can be cured.

  As a result, in the process from step S1 to step S6, the four fiber reinforced sheets 21a to 21d are integrated in a state of being attached to the upper half (outer surface 13a) side of the branch pipe 10.

  At this time, at the end of the fiber reinforced sheet 21a opposite to the overlapping portions 23a to 23c, the matrix resin 50 is cured in a state where the matrix resin 50 is covered on the auxiliary members 45a to 45c (see FIG. 9). ).

Next, in step S7, as shown in FIG. 10A, cutting is performed at the auxiliary member 45a using the cutting blade 51 (first cutting step).
Specifically, in order to cut the portion of the matrix resin 50 that covers the outer surface side of the auxiliary member 45a, from the outer peripheral surface side of the auxiliary member 45a along a direction substantially perpendicular to the outer surface of the branch pipe 10. The matrix resin 50 is cut.

At this time, as shown in FIG. 10B, when the matrix resin 50 is cut from the outer surface side and cut to a position where the auxiliary member 45a is exposed, the first cutting process is finished.
And after a 1st cutting process is complete | finished, as shown in FIG. 11, the end surface 25 of the matrix resin 50 is formed.

Here, the end face 25 is formed to have the above-described predetermined angle α (80 degrees or more).
Thereby, the end surface 25 of the predetermined | prescribed angle (alpha) shown in FIG. 5 can be formed in each edge part of the fiber reinforced sheets 21a, 21b, and 21c.

  In addition, the end surface 25 formed here should just ensure the thickness of the fiber reinforced sheets 21a-21d and 22a-22d containing glass fiber, and the part containing only the matrix resin 50 was thinned in the taper shape. The structure hardened | cured in the state may be sufficient.

  Therefore, it is important for the auxiliary members 45a to 45c to stop the movement of the fiber reinforced sheets 21a to 21d and 22a to 22d containing glass fibers. If the matrix resin 50 can ensure fluidity, the resin portion is tapered. The structure which hardened | cured in the state thinned may be sufficient.

  In addition, after cutting in the first cutting step, the unnecessary portion 50a cured at the portion over the auxiliary member 45a when viewed from the introduction portion of the matrix resin 50 is removed after cutting as shown in FIG.

  Next, step S8 (second arrangement step), step S9 (second sealing step), step S10 (second decompression step), step S11 (second introduction step), step S12 (second curing step), and step S13 In the (second cutting process), the same processes as those in steps S2 to S7 described above are performed on the outer surface 13b side of the branch pipe 10.

  Thereby, the fiber reinforced resin molded product 30 in which the outer surfaces 13a and 13b of the branch pipe 10 are divided into two stages and covered with the fiber reinforced sheets 21a to 21d and 22a to 22d can be obtained.

And the end surface 25 which has the desired angle (alpha) can be formed in the edge part of the matrix resin 50 also on the outer surface 13b side of the branch pipe 10 like the outer surface 13a side.
Therefore, the end surfaces of the matrix resin 50 having a predetermined angle α with respect to the outer surfaces 13a and 13b can be formed at the three ends of the main pipe 11 and the branch pipe 12 constituting the branch pipe 10, respectively.

  As a result, in the fiber reinforced resin molded product 30 in which the branch pipe 10 is reinforced by the fiber reinforced portions 21 and 22, a sufficient thickness can be ensured without the end portions of the fiber reinforced sheets 21a to 21c being thinned. Therefore, generation | occurrence | production of the crack in the edge part of the fiber reinforced sheets 21a-21c can be suppressed effectively.

[Other Embodiments]
As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary of invention.

(A)
In the said embodiment, as shown in FIG. 1, the fiber reinforced resin molded product reinforced by covering the fiber reinforced sheet 21a-21d and 22a-22d on the outer surface of the substantially T-shaped branch pipe 10 in planar view. 30 has been described as an example. However, the present invention is not limited to this.
For example, a substantially L-shaped resin tube shown in FIG. 12 or a fiber-reinforced resin molded product reinforced by covering the outer surface of a simple resin tube with a fiber-reinforced sheet may be used.
One of the outer surfaces of the substantially L-shaped resin tube 110 shown in FIG. 12 divided by the center plane D including the axis X11 of the first tube portion 111 and the axis X12 of the second tube portion 112 is the outer surface ( When the first covering surface (113a) and the other (dot portion in FIG. 7) are the other outer surface (second covering surface) 113b, the end portion of the fiber reinforced sheet fixed to the outer surfaces 113a and 113b is in the above-described angular range. By performing the cutting process, the same effects as described above can be obtained.

(B)
In the said embodiment, the example using the auxiliary member which has the through-hole 46 formed along the axial center direction of the branch pipe 10 was demonstrated and demonstrated. However, the present invention is not limited to this.
For example, a solid auxiliary member having no through hole may be used.

(C)
In the said embodiment, the example using the auxiliary members 45a-45c formed with rubber was given and demonstrated. However, the present invention is not limited to this.
For example, you may use the auxiliary member formed with the other material which has elasticity and can cut, such as urethane and a silicon | silicone.
Further, a hard resin that can be cut, FRP, wood or the like may be wound around the resin tube and used as an auxiliary member. In this case, the auxiliary member may be attached to the resin tube by so-called fitting.

(D)
In the said embodiment, the example which manufactures the fiber reinforced resin molded product 30 by fixing so that the outer surface of the branch pipe 10 may be covered by half using the four fiber reinforced sheets 21a-21d and 22a-22d is given. explained. However, the present invention is not limited to this.
For example, it may be a fiber reinforced resin molded article that is covered and fixed so as to make one round of the outer surface of the resin tube with one fiber reinforced sheet.

(E)
In the said embodiment, the example using glass fiber was given and demonstrated as the fiber raw material contained in the fiber reinforcement sheets 21a-21d and 22a-22d. However, the present invention is not limited to this.
The fiber material contained in the fiber reinforced sheet is not limited to glass fiber. For example, metal fiber and other inorganic fibers; carbon fiber, aramid fiber, polyvinyl alcohol fiber, vinyl chloride fiber, acrylic fiber, polyester fiber, polyurethane Fibers, polyethylene fibers, polypropylene fibers, polystyrene fibers, acetate fibers and other organic synthetic fibers; hemp and bamboo and other natural fibers; rayon and other regenerated fibers may be used.
Moreover, as for the fiber material contained in the fiber reinforced sheet mentioned above, one type of fiber material may be used independently, and a plurality of types of fiber materials may be used in combination.

(F)
In the said embodiment, unsaturated polyester resin (heat | fever) is used as the matrix resin 50 introduce | transduced in a 1st, 2nd introduction | transduction process in order to fix the fiber reinforcement sheets 21a-21d and 22a-22d on the outer surface of the branch pipe 10. FIG. An example using a curable resin) has been described. However, the present invention is not limited to this.
As the matrix resin to be introduced in the first and second introduction processes, other thermosetting resins such as acrylic resin, vinyl ester resin, alkyd resin, amino resin, epoxy resin, urethane resin, phenol resin, and silicon resin are used. May be.

(G)
In the above-described embodiment, it is arranged in a substantially T shape in plan view, and an inline using a spiral member 47 for accelerating the movement of the matrix resin introduced from the resin introduction device 43 in a desired direction. The example which manufactures the fiber reinforced resin molded product 30 with the fusion molding system 40 was given and demonstrated. However, the present invention is not limited to this.
For example, as shown in FIG. 13, matrix resin may be introduced from the three decompression device 44 sides without using a spiral member (see the arrow direction of the dashed line in FIG. 13).
In this case, since the matrix resin is introduced from three directions, the efficiency of filling the matrix resin in the sealed space can be further improved.

  The method for producing a fiber-reinforced resin molded article of the present invention has an effect that the occurrence of cracks at the end of the fiber-reinforced portion can be effectively suppressed, so that a fiber-reinforced portion is provided on the outer surface of the resin tube. The present invention is widely applicable to a method for manufacturing a reinforced fiber reinforced resin molded product.

10 Branch pipe (resin pipe)
DESCRIPTION OF SYMBOLS 11 Main pipe 12 Branch pipe 13a Outer surface 13b Outer surface 21 Fiber reinforced part 21a-21d Fiber reinforced sheet 22 Fiber reinforced part 22a-22d Fiber reinforced sheet 23a, 23b, 23c Overlapping part 24a Overlapping part 25 End surface 30 Fiber reinforced resin molded product 40 Infusion molding system 41 Airtight film 42a Sealing material (suction port side)
42b Sealing material (exhaust port side)
43 Resin introduction device 44 Decompression device 45a-45c Auxiliary member 46 Through hole 47 Spiral member 50 Matrix resin 50a Unnecessary portion 51 Cutting blade 110 Resin tube 111 First tube portion 112 Second tube portion 113a Outer surface 113b Outer surface d1, d2 Thickness D Center plane S Step X1, X2 Axle (pipe axis)
X11, X12 axis (tube axis)

Claims (8)

Fiber reinforcement including a cylindrical resin tube formed of a thermoplastic resin, a thermosetting resin arranged to cover an outer surface of the resin tube, and a reinforcing fiber arranged in the thermosetting resin A method for producing a fiber-reinforced resin molded product comprising a portion,
A bank in which an annular auxiliary member wound around the resin pipe is disposed in the vicinity of the end when a fiber reinforced sheet serving as a base material of the fiber reinforced section is disposed on the outer surface of the resin pipe. The placement process;
An arrangement step of arranging the fiber reinforced sheet on the outer surface of the resin pipe;
A sealing step of sealing the fiber reinforced sheet and the auxiliary member arranged on the outer surface in the arrangement step;
Introducing the matrix resin impregnated into the fiber reinforced sheet into the space sealed in the sealing step until the auxiliary member is overcome from a predetermined introduction portion;
A curing step of curing the matrix resin introduced into the space in the introduction step;
A cutting step of cutting the matrix resin until the auxiliary member is exposed along a direction substantially perpendicular to the outer surface of the resin pipe from the outer peripheral surface side of the auxiliary member at a position where the auxiliary member is wound;
A method for producing a fiber-reinforced resin molded article comprising: The fiber reinforced sheet is formed by laminating sheet-like fibers.
The manufacturing method of the fiber reinforced resin molded product of Claim 1. The auxiliary member has a thickness of 1.0 mm or more from the surface of the resin tube and 90% or less of the thickness of the fiber reinforced sheet.
The manufacturing method of the fiber reinforced resin molded product of Claim 1 or 2. The auxiliary member has a through-hole formed along the axial direction of the resin tube.
The manufacturing method of the fiber reinforced resin molded product of any one of Claim 1 to 3. The auxiliary member is formed of a softer material than the resin tube.
The manufacturing method of the fiber reinforced resin molded product of any one of Claim 1 to 4. The auxiliary member is formed using any one of rubber, urethane, and silicon.
The manufacturing method of the fiber reinforced resin molded product of Claim 5. The auxiliary member is formed using a resin that does not react with the matrix resin.
The manufacturing method of the fiber reinforced resin molded product of any one of Claim 1 to 6. A cylindrical resin tube formed of thermoplastic resin;
A fiber reinforced portion that is disposed so as to cover the outer surface of the resin tube, and includes a thermosetting resin and a reinforcing fiber disposed in the thermosetting resin;
Provided at an end of the fiber reinforced portion disposed so as to cover the resin tube, and an end surface disposed at an angle of 80 degrees or more with respect to the outer surface of the resin tube;
A fiber-reinforced resin molded product.

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