JP2002098269A - Reinforced plastic composite tube, its manufacturing method and its manufacturing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent breakage of nonwoven fabric and to increase bonding strength between resin mortar layer and ERP layer. SOLUTION: An inner surface reinforcement plastic layer (FRP layer) 1, a resin mortar layer 2, an outer surface reinforcement layer 3 are wrapped around a core metal 4 in order and the resin mortar layer 2 is wrapped by mounting resin mortar on nonwoven fabric 5 by a filament winding method to manufacture reinforced plastic composite tube P. During the process, nonwoven fabric to be wrapped around is passed through a piercing machine 10 to continuously pierce through-holes with a needle pin 14 on an outer surface of a roller 15. Since resin mortar reaches the outer surface FRP layer 3 through through-holes 30, bonding strength is greatly improved in comparison with nonwoven fabric in same thickness. Accordingly, mutual sticking strength between the resin mortar layer and the outer surface FRP layer can be increased while a primary retention function is fulfilled.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforced plastic composite pipe formed by a filament winding method, a drost form method or the like, a method of manufacturing the same, and an apparatus for manufacturing the same.

[0002]

2. Description of the Related Art Reinforced plastic composite pipes (hereinafter referred to as FRP)
As shown in FIG. 7, there is an M tube in which a resin mortar layer 2 and an outer FRP layer 3 are further laminated on an inner surface reinforced plastic layer (hereinafter, referred to as an FRP layer) 1.
As a method of manufacturing the FRPM tube, for example, there is a filament winding method. As shown in FIG.
P, a resin mortar is wound, and an inner FRP layer 1, a resin mortar layer 2, and an outer FRP layer 3 are sequentially formed.

[0003] At this time, the FRPM tube is connected to each layer 1, 2, 3
It is preferable that no inclusions exist from the viewpoint of bonding strength. However, since resin mortar has fluidity and weight, it is used as a non-woven fabric 5 for shape retention and support (for holding).
It is placed on top and wound.

[0004]

As described above, since there is preferably no intervening material between the layers 1, 2, and 3, the nonwoven fabric 5 as the intervening material should be as thin as it can fulfill its function. Will be done. However, when the pipe diameter increases, the resin mortar layer 2 also inevitably increases in thickness,
The nonwoven fabric 5 that supports it also needs to be thick. If the nonwoven fabric 5 becomes thicker, the resin mortar layer 2 and the outer surface F
The bonding strength (mutual adhesion strength) with the RP layer 3 is reduced, and the interface peels easily, so that it is impossible to obtain an FRPM tube having a required bonding strength. For this reason, conventionally, a thin nonwoven fabric 5 is used as much as possible, but if it breaks during winding, it becomes a defective product.

[0005] Under the circumstances described above, the present invention prevents the breakage of the non-woven fabric, and the resin mortar layer and the outer surface FRP.
It is an object to increase the bonding strength of a layer.

[0006]

In order to solve the above-mentioned problems, the present invention relates to a nonwoven fabric in which fibers are irregularly arranged and joined, and even if a non-woven fabric is pierced, extreme deterioration in strength may be caused. Noting that there was no such hole, perforations were formed on the entire surface of the nonwoven fabric as long as the strength for supporting the resin mortar was maintained. Due to the presence of the perforations, the penetration of the resin mortar or the outer surface reinforced plastic to the outer FRP layer or the resin mortar layer through the perforations is promoted,
Since the resin mortar layer and the outer surface FRP layer are connected by the mortar or plastic, the bonding strength is significantly improved as compared with a non-woven fabric having the same thickness. That is, while maintaining the original holding function, the mutual adhesion between the resin mortar layer and the outer surface FRP layer can be increased to improve the quality of the FRPM tube.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As an embodiment of the FRPM tube according to the present invention, in the tube shown in FIG. 7, a nonwoven fabric is interposed between the resin mortar layer and the outer surface FRP layer, and the nonwoven fabric covers the entire surface. The mortar or the plastic penetrates into the perforations, and the resin mortar layer and the outer surface FRP layer are connected by the mortar or the plastic.

To manufacture this FRPM tube, the inner surface FR
When sequentially winding the P layer, the resin mortar layer, and the outer surface FRP layer, a configuration in which perforations are formed on the entire surface of the nonwoven fabric may be employed.

The perforated non-woven fabric may be one in which the perforations are formed in advance, but the perforations are formed in the non-woven fabric in the foreground, or the mortar layer is wound around the inner surface FRP layer, and then the perforations are formed in the non-woven fabric. If you do
Pipe work can be performed continuously, and workability is good. After wrapping the resin mortar layer, in the case of perforating the non-woven fabric, the effect of the thickness of the non-woven fabric is small, and the perforation is also performed on the resin mortar. It comes into contact with or penetrates into the resin mortar layer on the inner surface through this, and has sufficient bonding strength.

[0010] The perforating machine comprises a roll having a perforating needle on the entire peripheral surface. The roll is pressed against a non-woven fabric and rotated to form continuous perforations. And a seat for receiving a piercing needle,
A configuration in which a nonwoven fabric is passed between a roll and a seat, and perforations are continuously formed in the nonwoven fabric by rotation of the roll may be adopted. The roll may be rotated with the drawing force of the nonwoven fabric or the rotating force of the wound layer of the nonwoven fabric, or may be rotated with separate power in synchronization with the drawing force or the like.

[0011]

FIG. 1 to FIG. 5 show an embodiment. As shown in FIG. 1, in this embodiment, similarly to FIG.
The FRPM tube P is manufactured by a filament winding method in which the resin mortar layer 2 and the outer surface FRP layer 3 are sequentially wound around the RP layer 1, the nonwoven fabric 5, and the like. After the perforation 30 is formed from the roll 6 through the perforator 10 on the frame 7 from the roll 6, the resin mortar is mounted and wound. In the figure, 8 is a guide roller.

As shown in FIGS. 3 to 5, the drilling machine 10 includes a base frame 11 fixed to the frame 7, a guide 12 for a seat made of a synthetic resin plate, and a support frame capable of moving forward and backward with the guide 12. 13 is provided, and a needle pin 14
A roll 15 is attached rotatably. The nonwoven fabric 5 is provided between the needle pin 14 (roll 15) and the guide 12.
The generation of wrinkles in the nonwoven fabric 5 is prevented by the tension of the nonwoven fabric 5 and the reaction force of the guide 12. Guide 12
A groove 16 for allowing the needle pin 14 to be inserted is formed in the groove corresponding to the arrangement of the needle pin 14.

An adjusting screw 17 is screwed to the center of the support frame 13, and guide pins 18 are screwed to both sides thereof. The guide pins 18 pass through the base frame 11. The adjusting screw 17 is threaded through a screw bearing 19 fixed to the base frame 11 by screwing.
The support frame 13 advances and retreats, and the roll 15 contacts and separates from the guide 12. The contact / separation interval is appropriately selected according to the thickness of the nonwoven fabric 5.

The roll 15 is rotatably supported via a ball bearing 22 on a shaft 21 fixed to the support frame 13 via an end cap 20. As the nonwoven fabric 5 travels, the needle pin 14 pierces the roll. The roll 15 rotates. The arrangement of the needle pins 14 is provided at equal intervals in the axial direction and the circumferential direction.
What is necessary is just to select suitably considering the strength etc. after perforation of the nonwoven fabric 5.

According to the punch 10, the nonwoven fabric 5 is passed between the roll 15 and the guide 12, and the roll 15 is advanced through the support frame 13 by the adjusting screw 17.
The interval is determined according to the thickness of In this state, as shown in FIG. 2, when the nonwoven fabric 5 travels by winding, the roll 15 rotates accordingly, and as the roller 15 rotates, the needle pins 14 on the peripheral surface sequentially contact the nonwoven fabric 5. The perforations 30 are continuously formed by piercing. At this time, perforation 3
0 is a long hole in the winding direction (running direction) of the nonwoven fabric 5, and its size can be arbitrarily changed depending on the degree of piercing of the needle pin 14.

In FIG. 6, the roll 15 of the punch 10 is provided in parallel with the winding layer of the nonwoven fabric 5 before the winding of the outer surface reinforced plastic layer 3 so that the pin 14 pierces the nonwoven fabric 2. The roll 15 also rotates with the rotation of the wound layer, and the perforations 30 are formed on the entire nonwoven fabric 5. At this time, the pins 14 may penetrate the nonwoven fabric 5 and reach the resin mortar layer 2. The roll 15 may be provided with a pressing force against the wound layer by a spring or the like.
The roll 15 can advance and retreat toward the winding layer via a stand or the like, and can be fixed at an appropriate position.

The roll 15 can be forcibly rotated by a motor or the like in accordance with the running speed of the nonwoven fabric 5 or the rotation speed of the wound layer. Also, the above embodiment is
Although the filament winding method is used, it is a matter of course that a similar effect can be obtained in the same manner by a drost form method or the like.

[0018]

According to the present invention, a nonwoven fabric for holding a resin mortar having perforations is used, so that a nonwoven fabric having a thickness sufficient to hold the resin mortar in the nonwoven fabric can be used. The nonwoven fabric is not cut, and the resin mortar is applied to the outer surface FRP through the perforations.
Since it is in contact with the layer, it has sufficient bonding strength.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of one embodiment.

FIG. 2 is an operation diagram of the embodiment.

FIG. 3 is a partially cut plan view of the drilling machine of the embodiment.

FIG. 4 is a front view of the same.

FIG. 5 is a partially cut side view of the left side.

FIG. 6 is a schematic view of a main part of another embodiment.

FIG. 7 is a cross-sectional view of a reinforced plastic composite pipe.

FIG. 8 is an explanatory diagram of tube production by a filament winding method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Inner surface FRP layer 2 Resin mortar layer 3 Outer surface FRP layer 4 Core metal 5 Nonwoven fabric 6 Frame 10 Drilling machine 11 Base frame 12 Guide (seat) 13 Supporting frame 14 Needle pin for punching (piercing needle) 15 Roll for punching 16 Needle pin Groove 17 Adjustment screw 30 Perforation P Reinforced plastic composite pipe (FRPM pipe)

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[Procedure amendment]

[Submission date] October 11, 2000 (2000.10.
11)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0001

[Correction method] Change

[Correction contents]

[0001]

TECHNICAL FIELD The present invention relates to a reinforced plastic composite pipe molding and a manufacturing method and a manufacturing apparatus due mainly filament winding method.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0017

[Correction method] Change

[Correction contents]

The roll 15 can be forcibly rotated by a motor or the like in accordance with the running speed of the nonwoven fabric 5 or the rotation speed of the wound layer .

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B29L 23:00 B29C 67/14 C (72) Inventor Yosuke Matsumoto 1-12-19 Kitahorie, Nishi-ku, Osaka-shi F-term (reference) in Kurimoto Kasei Kogyo Co., Ltd. HA02 HA14 HA23 HA32 HA37 HA44 HB01 HC06 HE16 HF01 HF05 HF23 HG06 HK02 HK16 HK22 HL02 HT02 HT03 HT07 HT13 HT22 HT26

Claims (8)

[Claims] 1. A reinforced plastic composite pipe P manufactured by sequentially winding an inner reinforced plastic layer 1, a resin mortar layer 2, and an outer reinforced plastic layer 3, wherein the reinforced plastic composite pipe P is provided between the resin mortar layer 2 and the outer reinforced plastic layer 3. A non-woven fabric 5 is interposed in the non-woven fabric 5, and a perforation 30 is formed in the entire non-woven fabric 5, and the mortar of the resin mortar layer 2 or the plastic of the outer reinforced plastic layer 3 penetrates into the perforation 30, and the mortar or plastic A reinforced plastic composite pipe, wherein a resin mortar layer 2 and an outer surface reinforced plastic layer 3 are connected by a mortar layer. 2. The method according to claim 1, wherein the inner surface reinforced plastic layer 1, the resin mortar layer 2, and the outer surface reinforced plastic layer 3 are sequentially wound, and the resin mortar layer 2 is wound by placing the resin mortar on the nonwoven fabric 5. A method for producing a reinforced plastic composite pipe P as described above, wherein the nonwoven fabric 5 having perforations 30 formed on the entire surface thereof is used. 3. The method according to claim 2, wherein the perforations are formed in the nonwoven fabric before the resin mortar layer is placed on the nonwoven fabric. 4. The method according to claim 1, wherein the inner reinforced plastic layer 1, the resin mortar layer 2, and the outer reinforced plastic layer 3 are sequentially wound, and the winding of the resin mortar layer 2 is performed by placing the resin mortar on the nonwoven fabric 5. An apparatus for producing the reinforced plastic composite pipe P according to the above, characterized in that a perforator 10 for forming the perforations 30 in the nonwoven fabric 5 is provided before the resin mortar layer 2 is placed on the nonwoven fabric 5. Reinforced plastic composite pipe manufacturing equipment. 5. The perforating machine 10 includes a perforating needle 14 on the entire peripheral surface.
And a seat 12 for receiving the piercing needle 14
And the nonwoven fabric 5 is rolled with the roll 15 and the seat 12
The apparatus for manufacturing a reinforced plastic composite pipe according to claim 4, wherein the perforations (30) are continuously formed in the nonwoven fabric (5) by rotation of the roll (15). 6. The method according to claim 1, wherein the inner reinforced plastic layer 1, the resin mortar layer 2, and the outer reinforced plastic layer 3 are sequentially wound, and the winding of the resin mortar layer 2 is performed by placing the resin mortar on the nonwoven fabric 5. A method for manufacturing a reinforced plastic composite pipe P as described above, wherein the resin mortar layer 2 is placed on the nonwoven fabric 5 and wound around the inner surface reinforced plastic layer 1, and then the perforations 30 are formed in the nonwoven fabric 5. The above outer reinforced plastic layer 3
A method for producing a reinforced plastic composite tube, comprising: 7. The method according to claim 1, wherein the inner reinforced plastic layer 1, the resin mortar layer 2, and the outer reinforced plastic layer 3 are sequentially wound, and the winding of the resin mortar layer 2 is performed by placing the resin mortar on the nonwoven fabric 5. An apparatus for manufacturing a reinforced plastic composite pipe P according to the above, wherein the resin mortar layer 2 is placed on the nonwoven fabric 5 and wound around the inner surface reinforced plastic layer 1, and the perforations 30 are formed in the nonwoven fabric 5 of the wound layer. An apparatus for manufacturing a reinforced plastic composite pipe, comprising a drilling machine 10 to be formed. 8. The perforating machine 10 includes a perforating needle 14 on the entire peripheral surface.
The reinforced plastic composite according to claim 7, characterized in that the reinforced plastic composite comprises a roll 15 having the following structure, and the roll 15 is pressed against the nonwoven fabric 5 and rotated to form the perforations 30 in the nonwoven fabric 5 continuously. Pipe manufacturing equipment.