JP3473968B2 - Continuous production equipment for fiber reinforced resin pipes - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for continuously producing fiber-reinforced resin pipes. 2. Description of the Related Art Conventionally, a method for producing a fiber-reinforced thermoplastic resin molded product is described in Japanese Patent Application Laid-Open No. 1-286823 entitled "Method and Apparatus for Continuously Forming a Fiber-Reinforced Resin Molded Product". In addition to the above method, a method is generally known in which a heated and softened fiber reinforced resin plate is pressure-formed by a press having a mold. These methods are suitable for manufacturing a molded product in which the cross-sectional shape of the molded product is an open cross-section (refer to a cross-sectional shape in which the cross-section of the molded product does not form a closed curve; the same applies hereinafter). There is a problem that it is not possible to manufacture a tubular molded product having a cross-sectional shape in which the cross-section of the molded product forms a closed curve. [0003] As a method of forming a synthetic resin plate into a tubular shape, there is a filament winding method. However, this method has a problem that a huge amount of equipment investment is required since a complicated and advanced technique is used. In the method, since a thermosetting composite material is used as a synthetic resin plate, there is also a problem that a tubular body having a closed cross section cannot be formed with a thermoplastic composite material. Therefore, in the production of a tubular molded article made of a thermoplastic composite material, a method of mechanically joining molded articles having a plurality of open sections with bolts or nuts or chemically joining them with an adhesive or the like is used. I had no choice. However, this method has a problem that it is necessary to provide a joint at the periphery of each molded article and join them, which complicates the manufacturing process and lowers the production efficiency. Further, when mechanically joined with bolts and nuts or the like, a load is applied to the joined portion, so that it is necessary to provide a part or the like for reinforcement, which further complicates the manufacturing process.
Also, when chemically bonding with an adhesive or the like, there is a possibility that interfacial peeling of the bonding surface due to deterioration of the adhesive or the like may occur, and in particular, an adhesive suitable for bonding a polypropylene resin product has not been provided. It is difficult to manufacture a tubular body that can withstand use. SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a fiber-reinforced thermoplastic resin which does not require enormous capital investment. An object of the present invention is to provide an apparatus for implementing a method capable of efficiently forming a resin plate into a tubular shape. SUMMARY OF THE INVENTION An object of the present invention is to provide an elongate belt formed by laminating fiber-reinforced thermoplastic resin plates containing reinforcing fibers having a weight content of not less than 40% and not more than 85%. A step of producing a laminate, a step of sending the produced laminate to a resin pipe production line including a heating device, a molding device, a cooling device, a delivery roller, and a cutting device; Heating the laminate to a temperature equal to or higher than the softening temperature, winding the heated laminate along a long cylindrical winding core, forming a tubular shape, joining the edges thereof to form a tubular shape, The step of cooling and laminating the formed laminate, and the step of cutting the solidified tubular laminate to a predetermined length are achieved by an apparatus capable of carrying out a continuous production method of a fiber-reinforced resin pipe comprising: You. With the above construction, it becomes possible to continuously manufacture a fiber reinforced resin pipe without using a complicated apparatus. BEST MODE FOR CARRYING OUT THE INVENTION Referring to the drawings,
The details of the present invention will be described. 1 is an explanatory view of an apparatus for continuously manufacturing a fiber-reinforced resin pipe according to the present invention, FIG. 2 is a sectional view taken along a line A1 in FIG. 1, and FIG. 3 is a sectional view taken along a line A2 in FIG. FIG. 4 is a cross-sectional view taken along a line A3 in FIG.
FIG. 5 is a cross-sectional view taken along the line A4 in FIG. 1, and FIG.
1 is a sectional view taken along the line A5, FIG. 7 is a sectional view taken along the line A6 in FIG. 1, FIG. 8 is a sectional view taken along the line A7 in FIG. 1, and FIG. Sectional view at right angles to the axis,
FIG. 10 is a sectional view taken along a line A9 in FIG. In the figure, 1 is a laminate of fiber reinforced thermoplastic resin plates, 2 is a heating device, 3 is a molding device, 4 is a cooling device, 5 is a delivery roller,
6 is a cutting device. First, FIG. 1 will be described. This continuous production apparatus for fiber-reinforced resin pipes sends out a flat and band-shaped laminate 1 formed by laminating fiber-reinforced thermoplastic resin plates in a layer substantially horizontally to a line, and gradually forms it into a tube. The heating device 2, the forming device 3, the cooling device 4, the delivery roller 5, and the cutting device 6 are sequentially provided in the line along the traveling direction.
The heating device 2 heats the band-shaped laminate 1 passing therethrough to its softening temperature. The molding device 3 includes a long cylindrical core 30 extending from the outlet of the heating device 2 to just before the cutting device 6.
And the laminate 1 is provided around the core 30, and
And a series of flaps wound around zero and cylindrical. 31 and 32 are first flaps provided symmetrically in pairs, 33 is a second flap, and 34 is a third flap. In addition, although a part of the first flap 32 is hidden behind the band-shaped laminated body 1, this is mirror-symmetric with the first flap 31. The winding core 30 is a slender horizontal cylindrical member having a peripheral length shorter than the width of the laminated body 1, one end of which is in contact with the outlet side of the heating device 2, and the uppermost bus bar thereof is The laminate 1 is provided so as to be in contact with the center line of the lower surface of the laminate 1 sent out from the outlet 20 of the heating device 2. Therefore, the laminate 1 extruded from the heating device 2 advances toward the cooling device 4 while sliding between the surface of the core 30 and the flap. In the vicinity of the outlet of the heating device 2, the first flaps 31, 32
As shown in FIGS. 3 to 5, the cross section of the laminated body 1 is bent in an arcuate shape as shown in FIGS. It is twisted so as to be in close contact with. The first flaps 31 and 32 end when the laminate 1 is wound on the upper half circumferential surface of the core 30. The remaining part of the laminate 1 is a core 3
In this state, the winding operation is taken over by the second flap 33 in this state. Further, the second flap 33 is twisted in a right-hand spiral form, and as shown in FIGS. 6 and 7, guides one portion a of the laminated body 1 hanging from the winding core 30, and It is helically twisted as a whole to make it adhere to the lower surface. In this embodiment, one portion a of the laminated body 1 extends over substantially half the circumference of the core 30. However, the winding width can be arbitrarily determined. In the state of FIG. 7, the winding of the portion a by the second flap 33 ends, and the winding operation is taken over by the third flap 34. The third flap 34, as shown in FIGS.
The other one part b of the laminated body 1 hanging from 0 is guided, and is wound on the part a of the core 30 where the core 30 is to be wound first to form a cylindrical shape as a whole. It is pressed against the core 30 and air-tightly pressed. The laminated body 1 that has become a pipe is introduced into the cooling device 4 and solidified by cooling.
Further, it is guided by the delivery roller 5 and cut by the cutting device 6 to a desired length. The cooling device 4 for the core 30
It is recommended that a draft angle be provided in a portion inside the. In the continuous production apparatus of the fiber-reinforced resin pipe according to the present invention having the above-described structure, a laminate delivery device (not shown) is formed by laminating the fiber-reinforced thermoplastic resin plates in a plane. By sending the strip-shaped laminate 1 to the line, the heating device 2 softens the laminate 1, and the first to third flaps 31, 32, 33, and 34 soften the laminate 1 around the core 30, The polymerized part is pressed and formed into a cylindrical shape. Further, the cooling device 4 cools and solidifies the laminated body 1 which has become a pipe, the delivery roller 5 guides the solidified laminated body 1, and the cutting device 6 cuts the guided laminated body 1 to a desired length. In the above description, the winding operation of the portion b by the third flap is performed after the winding operation of the portion a by the second flap is completed. When the width of the punching is narrow, the winding operation of the second flap and the third flap can be performed substantially simultaneously. The thermoplastic resin used as a raw material of the fiber-reinforced thermoplastic resin plate used for manufacturing the resin tube according to the present invention is not particularly limited. For example, polystyrene, polyvinyl chloride, high-density polyethylene, polypropylene, polycarbonate, polybutylene terephthalate, polyethylene terephthalate, polyether sulfone, polysulfone, polyetherimide (trade name: ULTEM), polyether ether ketone, polyphenylene sulfide, etc. can be used. However, from the viewpoints of strength, abrasion resistance, price and ease of recycling when it becomes waste, a polypropylene resin is recommended as the most desirable resin. Further, the structure of the present invention is not limited to the above-described embodiment. For example, the seam of the pipe may be a butt joint or a plate joint instead of a lap joint.
It is also recommended to use a drum-shaped roller together with the flap, and furthermore, the shape of other parts can be freely changed within the scope of the object of the present invention. Is included. The fiber reinforced resin pipe manufactured in this manner is used for rain gutters, U-shaped pipes, poles, and the like. Excellent workability on site,
By heating and softening part of the resin tube as necessary,
Optionally the tube can be bent. Since the present invention is constituted as described above, according to the present invention, a fiber-reinforced thermoplastic resin plate can be efficiently and easily formed into a tubular shape. Can be produced in large quantities. These pipes are excellent in dimensional accuracy because of their low coefficient of thermal expansion, and have good workability that allows secondary processing.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory view of a continuous production apparatus for a fiber-reinforced resin pipe according to the present invention. FIG. 2 is a cross-sectional view taken along a line A1 in FIG. FIG. 3 is a cross-sectional view taken along a line A2 in FIG. FIG. 4 is a cross-sectional view taken along a line A3 in FIG. FIG. 5 is a sectional view taken along a line A4 in FIG. 1; FIG. 6 is a sectional view taken along line A5 in FIG. 1; FIG. 7 is a sectional view taken along a line A6 in FIG. FIG. 8 is a sectional view taken along line A7 in FIG. 1; FIG. 9 is a cross-sectional view taken along a line A8 in FIG. FIG. 10 is a cross-sectional view taken along a line A9 in FIG. [Description of Signs] 1 ... Laminated body 2 ... Heating device 3 ... Forming device 30 ... Cores 31 and 32 First flap 33 Second flap 34 Third flap 4 Cooling device 5 ... Sending roller 6 ... Cutting device a ... One part b of the laminate ... The other part of the body

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Tanabe 1190 Kasama-cho, Sakae-ku, Yokohama-shi, Kanagawa Prefecture Mitsui Toatsu Chemicals Co., Ltd. (56) References JP-A-4-201547 (JP, A) JP-A Sho53 JP-A-39610 (JP, A) JP-A-52-141472 (JP, A) JP-B-60-30538 (JP, B1) JP-A-3-503389 (JP, A) (58) Fields investigated (Int. . ^7, DB name) B29C 53/50 B29C 70/06

Claims (1)

(1) A long strip-like laminate (1) formed by laminating fiber-reinforced thermoplastic resin plates containing reinforcing fibers having a weight content of 40% or more and 85% or less. ), A device for continuously heating the supplied laminate (1) to a temperature equal to or higher than the softening point, a device for forming the heated laminate (1) into a tube, and a device for forming the tube into a tube. An apparatus for cooling and solidifying the laminated body (1), and an apparatus for cutting the cooled laminated body (1) to a predetermined length. 3) an elongated cylindrical core (30) having a shorter circumferential length than the width of the laminate (1) and provided in contact with the lower surface of the laminate (1) sent out from the heating device (2); The laminate (1) is disposed around the core (30), and the laminate (1) is guided between the core (30) and the core (30). Only, the above continuous production apparatus for fiber-reinforced resin pipe comprising a first through third flap below for molding the tubular. B) contacting the upper surface of the laminate (1) in contact with the core (30);
And form a pair with a tangent between the core (30) and the laminate.
Are provided symmetrically in the traveling direction of the laminate (1).
Accordingly, the laminate (1) is densely placed on the upper half circumferential surface of the core (30).
A pair of first flaps (31,
32). B) of the laminate (1) hanging from the core (30)
Induce one part (a) and attach it to the lower surface of the winding core (30)
Helical twisted second flap for close fit
(33). C) the laminate (1) hanging from the core (30);
Induce the other part (b) and at least part of it
Lie on the part (a) already in close contact with the core (30)
And press the stamped part against the core (30).
The third flap (3
4).