WO1995015255A1 - Procede et appareil de moulage par etirage en continu de tiges en matiere plastique renforcee par fibres portant une rainure helicoidale - Google Patents
Procede et appareil de moulage par etirage en continu de tiges en matiere plastique renforcee par fibres portant une rainure helicoidale Download PDFInfo
- Publication number
- WO1995015255A1 WO1995015255A1 PCT/JP1994/002036 JP9402036W WO9515255A1 WO 1995015255 A1 WO1995015255 A1 WO 1995015255A1 JP 9402036 W JP9402036 W JP 9402036W WO 9515255 A1 WO9515255 A1 WO 9515255A1
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- WIPO (PCT)
- Prior art keywords
- tape
- fiber
- winding
- fiber bundle
- rod
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
- B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
- B29C59/021—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing of profiled articles, e.g. hollow or tubular articles, beams
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/06—Rod-shaped
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/12—Articles with an irregular circumference when viewed in cross-section, e.g. window profiles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/22—Corrugating
- B29C53/30—Corrugating of tubes
- B29C53/305—Corrugating of tubes using a cording process
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
- B29C70/52—Pultrusion, i.e. forming and compressing by continuously pulling through a die
- B29C70/525—Component parts, details or accessories; Auxiliary operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
- B29C70/52—Pultrusion, i.e. forming and compressing by continuously pulling through a die
- B29C70/525—Component parts, details or accessories; Auxiliary operations
- B29C70/526—Pultrusion dies, e.g. dies with moving or rotating parts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/56—Winding and joining, e.g. winding spirally
- B29C53/58—Winding and joining, e.g. winding spirally helically
Definitions
- the present invention relates to a method and an apparatus for continuous pultrusion of rods made of fiber reinforced plastic with spiral grooves (hereinafter abbreviated as FRP) among concrete reinforcing bars.
- FRP fiber reinforced plastic with spiral grooves
- Conventional methods and devices for forming a FRP rod with a spiral groove include, for example, JP-B-57-184484, JP-A-3-33045, and JP-A-Hei.
- the ones disclosed in Japanese Patent Application Laid-Open No. 4-12828 and Japanese Patent Application Laid-Open No. 5-12416 are known.
- the one described in Japanese Patent Application Laid-Open No. 57-184484 is configured as shown in FIG. 1 and has a thermosetting resin on the surface of a mandrel a.
- the glass fibers c impregnated with b were aligned and passed through a heating mold d to be in a semi-cured state to obtain a glass fiber reinforced resin body g, which was then coated or coated with a release agent.
- the metal wire e is continuously wound in a spiral shape, and then heated and cured in a heating furnace f. Finally, the metal wire e is removed from the surface, thereby forming a spiral groove on the surface of the glass fiber reinforced resin body g. h is formed.
- the structure disclosed in Japanese Patent Application Laid-Open No. 3-33045 is configured as shown in FIG.
- a linear fiber base material c ′ is impregnated with a thermosetting resin b, and then a fiber material c 'is passed through a preform mold i to make the resin uncured or semi-cured, and then a tough filamentary body e' is spirally wound around the surface of the fiber base material C 'at predetermined intervals.
- a heat-resistant tape j is spirally wound so as to cover the fiber surface of the portion where the above-mentioned tough filamentary body e 'is not wound, and then in a heating furnace f in this state.
- JP-A-4-12828 and JP-A-5-124116 are configured as shown in FIG. 3 and are made of FRP resin before curing.
- a spiral groove h is formed by winding the strip m around the head k and then hardening it in a heating furnace, and then winding the strip m.
- a glass fiber c impregnated with a resin b is semi-cured, and a metal wire e for forming a groove is formed on the glass fiber c. It is wound and heated and cured.
- curing is performed in a state where there is a gap between the heating furnace f and the resin-impregnated fiber. That is, since the inner surface of the furnace and the fiber surface are not in contact with each other, heat exchange is not performed efficiently, and the surface of the molded product is not smooth.
- the groove is provided by passing through a rotary mold having a spiral projection instead of the wire.
- the cross-sectional shape of the protrusion is an arc shape
- the cross-sectional shape of the groove of the molded product is also an arc shape.
- the properties required for the concrete reinforcement include high strength and high concrete adhesion.
- high strength it is necessary to make the depth of the groove as shallow as possible, and to reduce the orientation angle of the fiber.
- high concrete adhesion increase the depth of the groove Or increase the surface area of the groove. Therefore, in order to obtain high strength and high adhesion, it is desirable to increase the surface area of the groove.
- the groove cross-sectional shape of a circle arc reducing the depth of the grooves, also c there is a limit to increase the groove area
- wrapped metal striatum e conceptually describe a method and apparatus relating to winding There is no concreteness.
- the material for forming the groove is a rope-shaped synthetic resin or the like.
- the band m is used for curing and molding in the mold at the same time, no specific shape of the band m is described.
- the rotation speed of the winding of the belt-shaped body m is kept constant in conjunction with the molding speed, a problem occurs at the time of winding.In other words, there is a problem even when the winding rotation speed is set to be constant when winding.
- the take-up rotation speed is constant during winding, even if the forming rod take-up speed and the band winding speed are set constant during molding, the forming rod take-up machine and the band A slight speed deviation occurs due to the accuracy of the rotation speed of the motor of the winding device, etc., and the pitch of the band m is slightly changed.
- the pitch of the band m is slightly changed. For example, if a 4 mm wide groove is formed in the shape of a cross spiral on a 8 mm diameter rod, even if the winding speed and winding speed are set so that the pitch is 4 Omm, the above-mentioned reasons can be considered.
- the pitch has shifted to 39 mm
- the surface area of the groove is shifted from 36.0% to 36.2%, so it does not affect the concrete adhesion, and in actual molding, it is pulled out While molding is continuously performed, the pitch often shifts little by little, but does not affect the properties of the molded product.
- this lmm pitch shift is 100 cm after the Om molding, and the winding position is shifted by 250 cm compared to the start of molding. Therefore, if the winding speed of the winding machine is kept constant, the tape cannot be wound.
- the present invention has been made in order to improve such a problem.
- the outer peripheral surface of the FRP rod with a spiral groove is smooth, and the pitch of the spiral groove does not fluctuate in the longitudinal direction.
- a plurality of reinforcing fibers are aligned, and an uncured thermosetting resin is impregnated in a state where tension is applied to the reinforcing fibers.
- the fiber bundle impregnated with the thermosetting resin is spirally wound with a resin-impregnating and elastic tape so that the winding angle is almost the same as the angle of the groove with respect to the rod axis direction.
- the fiber bundle wound with this tape and then wound with this tape is cut into a hole with substantially the same cross-sectional shape as the molding rod.
- the present invention provides a continuous pultrusion molding method for a fiber-reinforced plastic rod with a spiral groove, in which the thermosetting resin is heated and cured through a heating die having the tape, and then the tape is wound up.
- a flat tape having resin impregnation and elasticity is wound around a fiber bundle impregnated with an uncured thermosetting resin and heated.
- the tape is wound around the fiber bundle, and it is molded and cured in a heated mold that has virtually the same cross-sectional shape as the fiber-reinforced plastic rod.
- the tape since the tape has elasticity, it is possible to cope with a slight change in pitch during molding, and it is possible to prevent the tape from being shirred, and to improve the molded product.
- the groove can be formed well.
- the tape since the tape has a resin impregnating property, the tape wound around the fiber bundle is impregnated with the resin, and the resin is cured in the heat-cured portion. The tape can be wound up without breaking.
- the resin layer is formed on the surface of the tape and cured, the surface of the molded article becomes excellent in smoothness as in the case of ordinary pultrusion molding.
- the surface of the molded product is smooth, when the molded product is used as a concrete tensioning material, it is necessary to hold the molded This can reduce the concentration of stress on the product.
- the tension is applied when the reinforcing fibers are supplied, so that the reinforcing fibers are finely aligned, the fibers are not entangled in the resin impregnating device, and the resin is uniformly impregnated.
- the squeeze member is pressed immediately after that, the generation of hair of the fiber bundle is suppressed, and only the excess resin is removed.
- the tape is wound, the fiber bundle is prevented from being bent or distorted and the fiber from being twisted.
- the entrance of the hole of the heating mold has a taper whose entrance side is expanded, and the fiber bundle is passed through the entrance.
- the fiber bundle impregnated with the uncured resin around which the tape is wound is smoothly drawn into the mold, and the tape does not loosen at the entrance.
- the tape wound on the surface of the fiber bundle bites into the surface of the fiber bundle while being gradually pressed along the tape, and eventually moves on the inner surface of the mold when the surface of the tape becomes almost equal to the surface of the fiber bundle. Therefore, the molding is reliably performed without changing the winding position of the tape, and at the same time, the inner surface of the mold slides on the surface of the fiber bundle, so that the uncured resin is efficiently cured.
- a fiber supply device that applies a predetermined tension to the plurality of fibers to bundle the fibers and supplies the bundles; a resin impregnation device that impregnates the uncured thermosetting resin into the fiber bundle supplied from the fiber supply device; A tape winding device for applying a tension to the tape and keeping the tape winding angle around the fiber bundle at a predetermined pitch, and a tape winding device for winding the tape at a predetermined pitch on the fiber bundle; A heating die that passes through the fiber bundle and cures the thermosetting resin; A tape take-up device that has a control mechanism for making the take-up position substantially constant, and takes up the tape from the fiber bundle coming out of the heating die;
- the present invention provides a continuous pultrusion molding apparatus for a rod made of fiber reinforced plastic with a spiral groove, which includes a rod pulling apparatus.
- the tape wound around the uncured resin-impregnated fiber bundle is inserted into the mold, the tape is not affected by the fiber bundle. It can provide a molded product with a fixed pitch without any looseness.
- FIG. 1 is an explanatory diagram showing a first conventional example.
- FIG. 2 is an explanatory diagram showing a second conventional example.
- FIG. 3 is an explanatory diagram showing a third conventional example.
- FIG. 4 shows an embodiment of the apparatus of the present invention for carrying out the method of the present invention.
- FIG. 5 is an explanatory diagram showing a main part of an example of a mouth bing rack of the above embodiment.
- FIG. 6 is an explanatory view showing a main part of another example of the mouth-and-mouth binding of the above embodiment.
- FIG. 7 is an explanatory diagram showing a state of winding the tape in the above embodiment.
- FIG. 8 is a cross-sectional view showing the inlet of the heating mold apparatus of the above embodiment.
- FIG. 9 is an explanatory diagram showing a main part of an example of the tape winding section of the above embodiment.
- FIG. 10 is an explanatory diagram showing a main part of another example of the tape winding section of the embodiment.
- FIGS. 11 (a), 11 (b) and 11 (c) are explanatory views showing the operation of another example of the rod take-up device of the above embodiment.
- FIG. 12 is an explanatory diagram showing a problem when a film-shaped tape is wound.
- FIG. 13 is a front view showing a state where a film-shaped tape is wound.
- FIG. 14 is a plan view showing a state where a film-shaped tape is wound.
- FIGS. 15 (a), 15 (b) and 15 (c) are front views showing examples of a fiber-reinforced plastic rod with a spiral groove manufactured by the method and apparatus of the present invention. It is. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 4 shows an embodiment of the apparatus of the present invention.
- a singing rack 1 a resin bus device 2, a tape winding device 3, a heating mold device 4, a tape winding device 5, and a rod pulling device 6 are sequentially arranged from the upstream side of the work line. They are arranged in a straight line.
- the mouthpiece rack 1 draws out a large number of reinforcing fibers 7 while applying tension thereto.
- a means for applying this tension is to interpose a torque limiter 9 on a rotation support portion of a bobbin 8 around which a reinforcing fiber 7 is wound.
- the bobbin 8 rotates so as to pile on the rotation resistance.
- a spring 9 b is interposed between the side plate 8 a of the bobbin 8 and the holding plate 9 a, and the spring 9 b It may be designed so as to provide more necessary resistance. The holding force at this time is adjusted by changing the position of the holding plate 9a.
- the resin bath device 2 stores the thermosetting resin 10 in a molten state, and a plurality of resin buses 11 for guiding the reinforcing fibers 7 drawn from the roving rack 1 into the resin bus 11.
- the inner members 12a, 12b, 12c, ... are provided on the outlet side to bundle the reinforcing fibers 7 into the fiber bundles 13 and perform a pressing action to drop excess resin.
- the first member 14 is formed.
- the tape winding device 3 spirally winds the tape 15 around a fiber bundle 13 impregnated with uncured resin, which is bundled and pulled out by the squeezing member 14, as shown in FIG.
- the rotating plate 16 through which the fiber bundle 13 penetrates, the tape bobbin 17, the tape guide 18 for guiding the tape 15 fed from the tape bobbin 17, and the tape 15 fed out It consists of a torque limiter 19 that gives tension.
- the tape winding device 3 controls the bundle angle 0 2 so that the winding angle 0 1 becomes constant in accordance with the drawing speed of the fiber bundle 13. I have.
- the tape winding devices 3 are arranged in two sets with the winding directions reversed, so that two sets can be used simultaneously or one set can be selectively used.
- FIG. 8 shows a cylindrical molding die 4a of the heating mold device 4.
- the cross section of the entrance corner of the hole 4b of the molding die 4a is arc-shaped and the entrance side is It has a large tapered shape and the inside diameter of the other part of the hole 4b is the same as the diameter of the rod to be formed.
- the opening diameter D on the inlet side of the hole 4b is larger in the radial dimension by the thickness of the tape 15 described above, for example, 0.1 mm. When the rod diameter is 8 mm, it is about 2 Omm.
- the term “taper” here means that the cross-sectional area of the hole 4 b on the inlet side should gradually increase as it goes to the inlet side, and it may be linear or parabolic.
- CT P94 2036 CT P94 2036
- the tape take-up device 5 peels off the tape 15 from the molding rod 13a that is formed and drawn out by the heating mold device 4, and winds it.
- a take-up bobbin 21 is provided so that the tiller 20 rotates in the opposite direction to the tape take-up device 3.
- two sets of the tape winding devices 5 are arranged with the winding directions reversed, and two sets can be selectively used simultaneously or one set at a time. You can do it.
- FIG. 10 shows another example of the winding guide section.
- the movement limit position of the free guide 24 'in both directions is determined by a pair of sensors 27a, a laser transmitter 26a and a laser receiver 26b, respectively. It is designed to detect at 27 b.
- the free guide 24 ' has an intermediate portion pivotally supported by the support body 28 so as to swing in accordance with the winding position of the tape 15 and pull the forming rod 13a.
- a certain amount of deviation in the exit direction When (for example, 5 mm) occurs, it is detected across the laser beam of one sensor 27a (27b), and the winding speed becomes faster (or slower).
- the winding position is not limited to the above example, and the winding position is controlled while maintaining the same pitch by controlling the mouth forming speed, the winding rotation speed of the tape 15 and the winding rotation speed. You can do
- the rod take-off device 6 holds the molded rod 13a and pulls it in the take-off direction.
- the pull-out force of the reinforcing fiber 7 from the roving rack 1 is substantially equal to the pull-out force. Generated by the pulling force of the take-up device 6.
- FIG. 4 As the rod take-up device 6, a belt type is used as shown in FIG. 4, but as shown in FIGS. 11 (a), 11 (b) and 11 (c).
- the two sets of clamp devices 29 and 30 are separated from each other in the pulling-out direction and are reciprocally movable in the pulling-out direction. You may do it.
- the tape 15 is wound by the tape winding device 5
- the tape 15 is fed out at an angle of 02 with respect to the fiber bundle 13.
- Angle of wrap around 1 If the two angles 01 and 02 are different, the winding pitch will be deviated, and the wound tape 15 will be distorted, resulting in abnormal properties of the molded product and impairing the continuous formability.
- a tape made of Tetrone was used as the tape.
- the warp 100 D / weft 31 yarns, the weft: 100 D x 2, the weft density: 38 yarns / 3 cm, plain weave tape) with a thickness of 0.12 mm, 4 mm width, set the tape winding speed to 12.5 r.p.m., set the tape pulling force to 200 g, and impregnate the fiber bundle with uncured resin.
- the tape was wound crosswise by two sets of tape winding devices 3 and 3 and guided to a heating mold device 4.
- the fiber bundles 13 are smoothly introduced into the mold because the corners of the entrance are arc-shaped and tapered. It is drawn in.
- the tape 15 wound around the fiber bundle 13 bites into the surface of the fiber bundle 13 while being gradually pressed along the taper, and finally the tape surface becomes a fiber bundle.
- the inner surface of the mold is moved so as to be approximately equal to the surface of 13 and the tape 15 is securely formed by the tape 15 without changing the winding position, and at the same time, along the inner surface of the mold.
- the surface of the fiber bundle 13 moves, and the uncured resin is efficiently cured.
- the tape 15 was sequentially wound up and peeled off by the tape winding device 5, whereby a FRP rod as a molded product was obtained.
- the tape 15 to be wound is guided by the free guides 24 and 24 ', and when the winding position is shifted by, for example, 5 mm, the angle sensors 23, 27a, 2 7b works and the take-up rotation speed is controlled accordingly.
- the angle sensor 23 detects that the position of the free guide 24 is shifted by 5 mm to the side a
- the winding rotational speed is increased by the signal from the angle sensor 23.
- the rotation speed is reduced by a signal from the angle sensor 23, and the free guide 24 is always positive and negative.
- the position is corrected to be within the range of 5 mm.
- the reinforcing fibers 7 are tensioned, so that the fibers 7 can be neatly aligned in the resin bath device 2, and the fibers 7 in the resin bus 11 are not entangled, and the resin 7 Impregnation is also performed uniformly. Then, the generation of fluff of the fiber bundle 13 impregnated with the uncured resin in the squeeze member 14 is suppressed, and excess resin is removed. In addition, the tension can prevent the fiber bundle 13 from being bent or distorted when the tape 15 is wound and the reinforcing fiber 7 from being twisted due to the winding.
- the total tension of the reinforcing fiber 7 is not always constant, but is adjusted according to changes in various conditions such as a rod diameter, a groove shape, a winding tension of the tape 15, and a molding speed.
- the “tape” in the present invention refers to a tape having a flat shape and the following functions.
- a non-woven fabric, paper, or a non-continuous fiber such as a fiber and a monofilament or a long fiber
- the fibers are natural fibers such as cotton and hemp, polyester and vinylon.
- synthetic fibers such as synthetic fibers, semi-synthetic fibers such as acetate, artificial artificial fibers such as rayon, and inorganic fibers such as metal and glass are used.
- Sponge-shaped ones can also be used.
- the sponge tape refers to a tape of an open-cell foam, which is a material having a continuous cell and a material through which a fluid can freely pass. If necessary, a reinforcing material may be mixed into the tape. And the method of manufacturing this sponge is as follows.
- Continuous molding method such as calendering, extruding, compare belt casting, etc.
- inorganic fibers such as carbon fiber and glass fiber and organic fibers such as aramid fiber are used as reinforcing arrowheads.
- Thermosetting resins such as epoxy resins, unsaturated polyesters, and phenolic resins are used as the matrix resin, and in the present application, examples of the use of such resins have been shown, but depending on the circumstances, nylon resins, polyesters, and the like may be used.
- a thermoplastic resin is used for cooling and curing instead of heating and molding.
- flat tape enables the following.
- the tape thickness is 0.12 mm and the width is 4 mm.
- the pitch should be 40 mm when using fiber processed product tape.
- the present invention has been described using an example of manufacturing a rod with a circular cross section, the present invention is not limited to this. 90.
- rods with a cross-sectional shape eg, triangular, square, T-shaped, etc.
- it is not suitable to wrap a fiber-processed tape around the corner because the tape will bite deeply. Since the shape of the tape such as a square or an ellipse has a smaller bite than the above-mentioned shape, it can be applied as necessary.
- the number of reinforcing fibers (Vf), the diameter of the rod, the depth of the groove, the area of the groove, and the like are arbitrary depending on the required strength and concrete adhesion. Choose In other words, since the rod diameter, V f, and groove depth corresponding to the required strength are specified to some extent, the tape thickness and the number of tapes must be adjusted so that the surface area of the groove corresponds to the required concrete adhesive force. Select, and set the pull-out speed, winding rotation speed (if there are multiple tapes, each rotation speed), and winding rotation direction.
- the molding was performed in the same manner as in the above embodiment except that the tension of the fiber 7 in the mouthpiece 1 was released.
- the molding was performed in exactly the same manner as in the example except that no tension was applied to the tape when the tape was wound.
- the molding was carried out in exactly the same manner as in the example except that a tape having a diameter of lmm was used instead of the tape.
- the molding was carried out in exactly the same manner as in the example, except that a mold was used which did not have a taper at the entrance and had only an arc-shaped process with a radius of 3 mm.
- the wound tape In the case of a non-tapered mold, the wound tape shifted. If the wound tape is extremely displaced, the shape of the rod is disturbed, and due to continuous molding, the displacement of the tape becomes severe, and the tape floats from the uncured resin-impregnated fiber bundle at the mold entrance. The tape will accumulate and the rod will not have a certain groove.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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- Moulding By Coating Moulds (AREA)
- Reinforcement Elements For Buildings (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP95902300A EP0733465A4 (en) | 1993-12-03 | 1994-12-02 | METHOD AND APPARATUS FOR CONTINUOUS DRAWING OF RODS OF FIBER REINFORCED PLASTIC MATERIAL HAVING A HELICAL GROOVE |
US08/649,669 US5811051A (en) | 1993-12-03 | 1994-12-02 | Method and apparatus for continuously draw-molding fiber reinforced plastic rod formed with spiral groove |
NO962257A NO962257L (no) | 1993-12-03 | 1996-05-31 | Fremgangsmåte og anordning for kontinuerlig trekkstöping av fiberforsterket plaststav utformet med spiralspor |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5303993A JP2613844B2 (ja) | 1993-12-03 | 1993-12-03 | 繊維強化プラスチック製ロッドの連続引抜成形方法及びその装置 |
JP5/303993 | 1993-12-03 |
Publications (1)
Publication Number | Publication Date |
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WO1995015255A1 true WO1995015255A1 (fr) | 1995-06-08 |
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ID=17927763
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1994/002036 WO1995015255A1 (fr) | 1993-12-03 | 1994-12-02 | Procede et appareil de moulage par etirage en continu de tiges en matiere plastique renforcee par fibres portant une rainure helicoidale |
Country Status (6)
Country | Link |
---|---|
US (1) | US5811051A (ja) |
EP (1) | EP0733465A4 (ja) |
JP (1) | JP2613844B2 (ja) |
CA (1) | CA2176920A1 (ja) |
NO (1) | NO962257L (ja) |
WO (1) | WO1995015255A1 (ja) |
Families Citing this family (41)
Publication number | Priority date | Publication date | Assignee | Title |
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CA2267075C (en) | 1996-10-07 | 2004-05-18 | Mark A. Kaiser | Reinforced composite product and apparatus and method for producing same |
US6306320B1 (en) * | 1999-07-29 | 2001-10-23 | Owens Corning Fiberglas Technology, Inc. | Method of increasing the strength and fatigue resistance of fiber reinforced composites |
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- 1994-12-02 US US08/649,669 patent/US5811051A/en not_active Expired - Fee Related
- 1994-12-02 WO PCT/JP1994/002036 patent/WO1995015255A1/ja not_active Application Discontinuation
- 1994-12-02 CA CA002176920A patent/CA2176920A1/en not_active Abandoned
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- 1996-05-31 NO NO962257A patent/NO962257L/no unknown
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JPS5634431A (en) * | 1979-08-31 | 1981-04-06 | Chuko Kasei Kogyo Kk | Preparation of inorganic-fiber woven fabric pipe with wave-form indented part on surface thereof |
JPS62176950A (ja) * | 1985-11-07 | 1987-08-03 | アクゾ・ナ−ムロ−ゼ・フエンノ−トシヤツプ | プレストレスドコンクリート要素の製造方法 |
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Also Published As
Publication number | Publication date |
---|---|
EP0733465A4 (en) | 1997-04-16 |
US5811051A (en) | 1998-09-22 |
NO962257D0 (no) | 1996-05-31 |
JPH07156280A (ja) | 1995-06-20 |
NO962257L (no) | 1996-05-31 |
CA2176920A1 (en) | 1995-06-08 |
JP2613844B2 (ja) | 1997-05-28 |
EP0733465A1 (en) | 1996-09-25 |
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