JPH10169853A - Device and method for molding resin composite pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely mold the outer periphery of layered product which is layer on a core into a predetermined shape when manufacturing a resin composite pipe. SOLUTION: When layered product 20 is formed by stacking glass fiber reinforced resin layers 24, 25, a resin concrete layer 26, and glass fiber reinforced resin layers 27, 28 in sequence on the outer peripheral surface of a cylinder core 21 being rotated, each semicylindrical element removably mounted at the lower end of a support shaft 12 is fitted over and joined to the layered product 20 so as to form a predetermined cylindrical shape. Each semicylindrical element 11 fitted over the layered product 20 is removed each support shaft 12 and rotated together with the layered product 20. Each semicylindrical element is fitted over the layered product 20 until the resin forming the layered product 20 cures.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for manufacturing a resin composite pipe having a resin mortar layer such as resin concrete between a pair of fiber reinforced resin layers. The present invention relates to a molding apparatus and a molding method used for molding.

[0002]

2. Description of the Related Art A resin composite tube in which a glass-reinforced resin layer is laminated on an inner layer and an outer layer of a resin-concrete layer having a tubular structure as an intermediate layer is usually provided on a rotating cylindrical core tube. A glass fiber reinforced resin layer is spirally laminated, a resin concrete layer is spirally laminated on the glass fiber reinforced resin layer, and a glass fiber reinforced resin layer is spirally laminated on the resin concrete layer. It has become. Then, the laminated body of each glass fiber reinforced resin and the resin concrete layer is cured while being laminated on the core mold.

[0003] The outer diameter of the resin composite tube manufactured in this manner varies depending on the thickness of each glass fiber reinforced resin layer and the resin concrete layer, so that it is not possible to stabilize the outer diameter to a certain size. is there. In addition, there is a problem that the outer peripheral surface of the laminate is not smooth because the surface of the glass fiber reinforced resin layer serving as the outer layer is exposed.

Japanese Patent Application Laid-Open No. 57-150531 discloses a laminated body in which a glass fiber reinforced resin layer, a resin concrete layer, and a glass fiber reinforced resin layer laminated in this order on a core mold are formed with a predetermined inner diameter. There is disclosed a method of forming an outer diameter of a laminate to a predetermined dimension by passing the laminated body through an outer diameter regulating mold having the same. In this method, since the uncured laminate passes through the inside of the fixed outer diameter regulating type, a shearing force is generated between the inner peripheral surface of the outer diameter regulating type and the outer peripheral surface of the laminate. Acting, the outer peripheral surface of the laminate may be flawed, uneven, or the like, or the resin on the outer peripheral surface of the laminate may adhere to the inner peripheral surface of the outer diameter regulating type, and the outer peripheral surface of the laminate may not be formed smoothly. .

Japanese Patent Application Laid-Open No. Hei 2-131921 discloses that a plurality of driven rollers, which are driven and rotated, are brought into contact with the outer peripheral surface of a receiving port of a laminated body and rolled. A method is disclosed in which the receptacle is formed to have a predetermined outer diameter by moving the receptacle in a predetermined direction. As described above, when the outer diameter of the laminate is regulated by the driven forming rollers, the outer peripheral surface of the laminate is formed into a smooth state.

[0006]

However, as described above,
In the method of regulating the outer diameter by rolling a plurality of rollers on the outer peripheral surface of the laminated body, each roller is only in line contact with the outer peripheral surface of the laminated body, and the outer peripheral surface of the laminated body is covered over the entire circumference. There is a problem that it cannot be regulated at the same time. For this reason, the contact pressure of the forming roll with respect to the outer peripheral surface of the laminated body fluctuates due to the rotational accuracy of the core mold, the thickness variation of the resin layer laminated on the core mold, etc. There is a possibility that it cannot be molded into

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to provide a resin composite pipe which has an outer peripheral surface of a laminate laminated in a cylindrical core over the entire circumference. An object of the present invention is to provide an apparatus and a method for molding a resin composite pipe that can be uniformly molded.

[0008]

The resin composite pipe forming apparatus of the present invention rotates a cylindrical core mold while rotating a cylindrical mold on an outer peripheral surface of the core mold. When manufacturing resin composite tubes by sequentially laminating resin layers,
An apparatus for forming an outer peripheral surface of a laminated body laminated on an outer peripheral surface of a core mold, which is arranged so as to be able to approach and separate from each other with the laminated body on the core mold interposed therebetween, and approach each other. By this, a pair of semi-cylindrical bodies joined together in a state fitted to the laminated body to form a predetermined cylindrical shape, and each semi-cylindrical body is detachably attachable and detachable from each other. And a pair of supports that are movable in the axial direction of the core and the core, respectively.

According to the method of molding a resin composite tube of the present invention, a fiber-reinforced resin layer made of continuous fibers impregnated with a resin is laminated on the surface of a cylindrical core while spirally rotating a cylindrical core. And a step of rotating the core-mold together with the pair of semi-cylindrical bodies by interposing the pair of semi-cylindrical bodies on the outer peripheral surface of the fiber-reinforced resin layer, and separating the pair of semi-cylindrical bodies after the thermosetting resin is cured. Moving to the near side in the axial center direction.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a side view showing an example of an embodiment of an apparatus for molding a resin composite pipe according to the present invention. The resin composite pipe molding apparatus is used for molding a resin composite pipe manufactured by a drossholm method.

In the dross-holm system, a core mold 21 having a cylindrical shape formed by spirally winding a steel belt is used. The core mold 21 is rotated so that the steel belt is sequentially wound in a spiral shape, and the steel belt forming the core mold 21 is spirally fed to the tip of the core mold 21 while being rotated while being rotated. I have.

When manufacturing a resin composite tube, first, a release film 22 is spirally wound around a rotating core die 21. The release film 21 is provided so that the resin composite tube to be manufactured is easily released from the core mold 21. Next, on a release film 22 wound around a core mold 21, a glass paper 23 serving as an inner surface protection material of the resin composite tube is provided.
Are sequentially spirally wound.

Thereafter, a glass fiber reinforced resin layer 24 serving as a circumferential reinforcing material on the inner peripheral side of the resin composite tube is spirally laminated on the glass paper 23. The glass fiber reinforced resin layer 24 as a circumferential reinforcing material is formed by, for example, passing a bundled glass fiber roving through a resin tank containing a thermosetting resin in a molten state to form a bundled glass fiber roving. It is constituted by impregnating a resin.

The lamination of the glass fiber reinforced resin layer 24 as the circumferential reinforcing material is performed by impregnating the glass fiber rovings thus bundled with a resin into the glass paper 23.
Glass paper 2
A glass fiber roving may be spirally wound around 3, and the glass fiber roving may be impregnated with a thermosetting molten resin.

When the glass fiber reinforced resin layer 24 as the circumferential reinforcing material is spirally laminated in the glass paper 23, the glass fiber reinforced resin layer 25 as the inner circumferential axial reinforcing material is spirally laminated. Is done. The glass fiber reinforced resin layer 25 as the axial reinforcing material is, for example, sprayed with a chop mat on the glass fiber reinforced resin layer 24 which is rotated together with the core mold 21, and becomes a molten state in the sprayed chop mat. It is laminated by impregnating a thermosetting resin.

The lamination of the glass fiber reinforced resin layer 25 as the axial reinforcing material is not limited to such a configuration, and both ends of a large number of glass fiber pieces obtained by cutting glass fibers into a certain length are connected to vinylon. It may be performed by connecting the glass fiber pieces in a ladder shape with fibers, winding the glass fiber pieces around the core mold 21 so as to be in the axial direction, and then impregnating with a molten thermosetting resin. .

Thereafter, a resin concrete layer 26 formed by covering a resin concrete obtained by kneading a resin and sand with a nonwoven fabric is spirally laminated on the glass fiber reinforced resin layer 25. The resin concrete constituting the resin concrete layer 26 is, for example, a mixture of silica sand No. 3, silica sand No. 7 and calcium carbonate, and a resin, and is extruded onto the core mold 21 by a kneader.
Covered by non-woven fabric. The resin concrete layer 26 is formed by being wound on the rotating core mold 21. This resin concrete layer 26
It becomes the middle layer of the resin composite tube.

When the resin concrete layer 26 is laminated, a glass fiber reinforced resin layer 27 as an axial reinforcing material on the outer peripheral side is spirally laminated on the resin concrete layer 26. This glass fiber reinforced resin layer 27 is similar to the glass fiber reinforced resin layer 27 that is
For example, it is configured by impregnating a chop mat with a molten resin.

Further, a glass fiber reinforced resin layer 28 as a circumferential reinforcing material on the outer peripheral side is spirally laminated on a glass fiber reinforced resin layer 27 as an axial reinforcing material. This glass fiber reinforced resin layer 28 is also configured by impregnating a glass fiber roving with a molten resin, similarly to the glass fiber reinforced resin layer 24 as a circumferential reinforcing material on the inner peripheral side.

When the glass fiber reinforced resin layer 28 as the circumferential reinforcing material on the outer peripheral side is thus laminated, the nonwoven fabric 29 is spirally wound around the glass fiber reinforced resin layer 28.

As described above, the release film 22 and the glass paper 2 are placed on the core mold 21 composed of a steel belt.
3, glass fiber reinforced resin layers 24 and 25 constituting the inner layer of the resin composite pipe, resin concrete layer 26 constituting the intermediate layer of the resin composite pipe, glass fiber reinforced resin layers 27 and 28 constituting the outer layer of the resin composite pipe, When the nonwoven fabrics 29 are sequentially laminated, these laminates 20 are spirally fed to the tip side of the core mold 21 sequentially by the rotation of the core mold 21.

The forming apparatus 10 of the present invention is used to form a laminated body spirally fed toward the tip end of the core mold 21.
It is arranged in the moving area of the spirally fed laminated body 20.

FIG. 2 is a front view of the molding apparatus 10 of the present invention. The molding device 10 has a pair of semi-cylindrical bodies 11 fitted to a laminate 20. Each semi-cylindrical body 11 has a semi-cylindrical shape, and is arranged on each side of the laminated body 20 so as to face each other. Each semi-cylindrical body 11
By being mutually joined, it is formed in a cylindrical shape having a predetermined inner diameter. An electromagnet is provided at the tip of each semi-cylindrical body 11 to connect the tips to each other when they are joined to each other. The inner peripheral surface of each semi-cylindrical body 11 is
0, the cylinder has an inner diameter corresponding to the outer diameter of the resin composite pipe, and each inner peripheral surface is smooth.

Each semi-cylindrical body 11 has a central portion in the circumferential direction detachably attached to a lower end of a vertically arranged support shaft 12 by, for example, a chuck mechanism 15 which is opened and closed by an electromagnetic valve. The upper end of each support shaft 12 is attached to a slider 13. Each slider 13
Are slidably mounted on a pair of rails 14 provided on the ceiling so as to be parallel to each other along the axial direction of the laminate 20. The slider 13 moves the upper end of the support shaft 12 in a direction perpendicular to each rail 14 by a rack and a pinion mechanism driven by a motor (not shown). The semi-cylindrical bodies 11 mounted on the support shaft 12 are configured to be brought into contact with and separated from each other. Laminate 2
The semi-cylindrical bodies 11 approaching and separating from each other with 0 interposed therebetween are fitted to the outer peripheral surface of the laminated body 20 over the entire circumference in the circumferential direction by approaching each other.

The molding apparatus 10 having such a configuration is used as follows. The laminate 20 is laminated on the core mold 21,
While being sequentially rotated and moved to the distal end side of the core mold 21, each semi-cylindrical body 11 of the molding device 10 passes in a state where the resin constituting the laminated body 20 on the core mold 21 is semi-cured. Each is arranged so as to face the position. The position where each semi-cylindrical body 11 is arranged is set based on the curing time obtained based on the mixing ratio of the resin and the ambient temperature, and the moving distance of the laminated body 20 in the axial direction due to the rotation of the core mold 21. .
Each semi-cylindrical body 11 is moved to a position where the laminated body 20 is semi-cured by the slider 13 being moved along the rails 14.
By moving in the directions away from each other, each is set to a predetermined position.

In this state, when the laminated body 20 reaches between the semi-cylindrical bodies 11 in a semi-cured state, the respective semi-cylindrical bodies 11 approach each other by the sliders 13 as shown in FIG. , And fitted in a state of being pressed against the outer peripheral surface of the laminate 20. Then, the tips of the semi-cylindrical bodies 11 are firmly joined to each other by the electromagnet. As a result, the smooth inner peripheral surface of each semi-cylindrical body 11
0 is pressed against the outer peripheral surface.

In such a state, the chuck mechanism 15 that mounts each half-cylindrical body 11 on the support shaft 12 is driven, and each half-cylindrical body 11 is detached from the support shaft 12. Thereby, as shown in FIG. 4, each semi-cylindrical body 11, which is strongly pressed against the outer peripheral surface of the laminate 20 and is joined to each other, is connected to the laminate 20 spirally fed by the rotation of the core mold 21. It moves to the tip side of the core mold 21 while rotating integrally.

In this case, the mutually joined semi-cylindrical bodies 1
Even if the inner diameter of the cylinder formed by 1 is slightly larger than the outer diameter of the laminated body 20, since the semi-cylindrical bodies 11 are firmly connected by the electromagnet, the laminated body There is no danger of detachment from the stack 20, and by rotating integrally with the stack 20, the stack 20 has a predetermined outer diameter by the inner circumferential surface of each semi-cylindrical body 11 and the outer circumferential surface of the stack 20. Is smoothed.

Each semi-cylindrical body 11 integrated with the laminated body 20 is sequentially moved while rotating toward the tip of the core mold 21 by the rotation of the core mold 21 together with the laminated body 20. The resin constituting the laminate 20 is such that the laminate 20
The mixing ratio and the like are set so that the resin composition is cured while being moved in the axial direction of the core mold 21 while rotating on the top 1. And
Until the resin constituting the laminate 20 is cured, each semi-cylindrical body 11 is fitted to the laminate 20 and
At the same time, it is moved in the axial direction of the core mold 21 while rotating, and the outer peripheral surface of the laminated body 20 is brought into a smooth state.

While each semi-cylindrical body 11 is in a state of being fitted with the laminated body 20, the semi-cylindrical body 11 is fitted to the laminated body 20 in order to shorten the curing time of the resin constituting the laminated body 20. Alternatively, a curing furnace may be arranged in the moving area of each semi-cylindrical body 11 so that the laminated body 20 fitted with each semi-cylindrical body 11 may pass through the curing furnace.

The sliders 13 that are movable along the rails 14 until the resin constituting the laminated body 20 in which the semi-cylindrical bodies 11 are fitted are cured. Moved. Then, each slider 13 is disposed at a position where the resin forming the laminated body 20 spirally fed by the rotation of the core mold 21 is in a completely cured state. Therefore, the support shafts 12 attached to the respective sliders 13 are arranged so as to sandwich the moving range of the stacked body 20.

After that, each semi-cylindrical body 11 together with the spirally fed laminated body 20 is connected to each slider 13 and the support shaft 1.
2 is moved to the position where the two semi-cylindrical bodies 11 are arranged, and the joining surfaces of the semi-cylindrical bodies 11 are in a vertical state.
When the sliders 13 face the center portion of the outer peripheral surface of each of the support shafts 1, the respective support shafts 12 are brought closer to each other by the respective sliders 13.
Then, when each chuck mechanism 15 reaches a predetermined position of each semi-cylindrical body 11, each chuck mechanism 15 is driven, and each semi-cylindrical body 11 is mounted on the lower end of each support shaft 12.

In such a state, each semi-cylindrical body 11
The joined state of each other is released, and each slider 1
3 is driven, the respective support shafts 12 are moved in a direction away from each other, and the fitted state between each semi-cylindrical body 11 and the laminated body 20 is released.

Each semi-cylindrical body 11 whose fitting state with the laminated body 20 has been released is returned to a position where the resin constituting the laminated body 20 on the core mold 21 is uncured, and the above-described operation is repeated again. It is. In addition, the portion of the laminated body 20 that has been cured while the outer surface is regulated by each semi-cylindrical body 11 is cut over a predetermined length to form a predetermined resin composite tube.

[0036]

According to the molding apparatus and the molding method for a resin composite pipe of the present invention, a pair of semi-cylindrical bodies arranged on both sides of a laminated body laminated on a core mold are brought close to each other. Since the joined semi-cylindrical bodies rotate together with the laminated body while being joined to the laminated body by joining, the inner peripheral surface of each semi-cylindrical body causes The outer peripheral surface of the body is reliably formed into a predetermined shape over the entire circumference.

[Brief description of the drawings]

FIG. 1 is a side view showing an example of an embodiment of a resin composite tube forming apparatus according to the present invention.

FIG. 2 is a front view of the molding apparatus.

FIG. 3 is a front view for explaining the operation of the molding apparatus.

FIG. 4 is a front view for explaining the operation of the molding apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Forming apparatus 11 Semi-cylindrical body 12 Support shaft 13 Slider 14 Rail 15 Chuck mechanism 20 Laminated body 21 Core type 22 Release film 23 Glass paper 24 Glass fiber reinforced resin layer 25 Glass fiber reinforced resin layer 26 Resin concrete layer 27 Glass fiber reinforced Resin layer 28 Glass fiber reinforced resin layer 29 Non-woven fabric

Claims (2)

[Claims] 1. A method of manufacturing a resin composite pipe by sequentially laminating a fiber-reinforced resin layer on the outer peripheral surface of a cylindrical core while rotating the cylindrical core, the laminated core is laminated on the outer peripheral surface of the core. A device for forming an outer peripheral surface of a laminated body, which is arranged so as to be able to contact and separate from each other with the laminated body on a core mold interposed therebetween, and fitted to the laminated body by approaching each other. A pair of semi-cylindrical bodies joined together to form a predetermined cylindrical shape, and each semi-cylindrical body is detachably attached to each other, in a direction in which the semi-cylindrical bodies are brought into and away from each other and in a core axis direction. A resin composite pipe molding apparatus, comprising: a pair of supports that are movable. 2. While rotating a cylindrical core mold in a spiral shape,
A step of laminating a fiber-reinforced resin layer made of continuous fibers impregnated with resin on the surface of the core mold; and a pair of semi-cylindrical bodies being fitted to the outer peripheral surface of the fiber-reinforced resin layer with the core interposed therebetween. A method of forming a resin composite pipe, comprising: rotating the thermosetting resin together with the mold; and separating the pair of semi-cylindrical bodies and moving the semi-cylindrical bodies toward the front side in the axial direction after the thermosetting resin is cured.