JP2675865B2 - Continuous molding method for fiber-reinforced synthetic resin lattice - Google Patents

Description

TECHNICAL FIELD The present invention relates to a continuous molding method of a fiber-reinforced synthetic resin (FRP) lattice-like body used as a reinforcing material for concrete or the like.

[Prior Art and Problems to be Solved by the Invention] Conventionally, by using a template with a pin, orienting the resin-impregnated fiber manually or with an industrial robot, FRP grids are produced one by one. It was pressed through a film in order to form a body and harden the fiber intersection. Therefore, it was a method with extremely low productivity.

[Means for Solving the Problems] According to the present invention, in the conventional method, only one FRP grid-like body can be formed, which is inefficient, and a large amount can be continuously formed. Is. That is, the present invention is spaced parallel to the direction of travel on the advancing carrier,
A plurality of linear longitudinal members made of uncured resin-impregnated continuous fibers are arranged, the longitudinal members are advanced together with a carrier, and before or after the longitudinal members are arranged, the uncured resin-impregnated continuous fibers intersecting with the longitudinal members. By arranging a plurality of linear horizontal members at intervals, a grid-like body formed from vertical and horizontal members is formed, and the grid-like body is cured on the carrier in progress and then cut and taken out. The present invention provides a method for continuously molding a fiber-reinforced synthetic resin lattice-shaped body.

The present invention will be described in detail below with reference to FIGS.

FIG. 1 is a front view showing an example of a molding apparatus for carrying out the continuous molding method of the present invention, and FIG. 2 is a plan view thereof. The linear longitudinal member 2 made of uncured resin-impregnated continuous fibers obtained by passing continuous fibers such as glass roving through the uncured resin-impregnated tank of FIGS. 1-2 (1) is shown in FIGS. Plural units are arranged on a carrier such as a bar conveyor.
As shown in FIG. 1 (3), the carrier is continuously driven from right to left in the drawing by driving the sprocket 4.

An uncured resin-impregnated continuous fiber obtained by passing the continuous fiber through the uncured resin impregnation tank shown in FIGS. 1 and 2 (1) is provided on the linear longitudinal member arranged on the carrier traveling from right to left. A plurality of linear lateral members (6) are made to intersect each other at intervals.
It is also possible to first dispose the linear lateral members on the carrier and then cross-dispose the linear longitudinal members on the linear lateral members.

The method of arranging the horizontal member on the moving carrier is to move the horizontal member feeder shown in FIG. 1 (7) in the carrier moving direction and the direction intersecting with the carrier while moving the horizontal member on the carrier or on the vertical member on the carrier. The method of arranging on top is preferable. At this time, by arranging the lateral members while hooking the lateral members on the guide pins 8 provided at both ends of the carrier in the width direction, tension can be applied to the lateral members, and the lateral members do not bend between the longitudinal members.

By repeating such crossing arrangement of the vertical and horizontal members, it is possible to obtain a lattice-shaped body in which the crossing portions of the vertical and horizontal members are laminated in three or more layers. That is, the horizontal member is placed on the carrier by the first horizontal member feeder shown in FIG. 1 (7), the first vertical member shown in FIG. 1 (2) is placed on the carrier, and uncured on the first vertical member. 2nd by the lateral member feeder 9 via the resin impregnation tank 5
By arranging the horizontal members and arranging the second vertical member 10 on the horizontal members, it is possible to obtain a lattice having four layers of intersections.

The carrier on which the grid-like body composed of vertical and horizontal members made of uncured resin-impregnated continuous fibers is advanced from right to left in FIG. 1 and passes through a curing oven 11 for ultraviolet curing or the like, whereby the uncured resin is removed. The hardened and hardened grid-shaped body is taken out after the ears thereof are cut by the ear cutting machine 12 and the transverse cutting machine 13 to a desired length.

In the FRP grid-like body, it is important to secure the shear strength at the intersection of the vertical and horizontal members. For that purpose, it is necessary to crimp the intersection. When the uncured resin is cured by ultraviolet rays as shown in Fig. 1 (11), the linear vertical member (2) or ( Tensile force is applied to 10) and the intersection can be crimped by using this tension. The radius of curvature of the curve varies depending on the size of the lattice-shaped body and its usage, but is preferably about 10 to 40 m. or,
In the case of heat curing, a belt conveyor made of steel or synthetic resin for pressure-bonding the lattice-shaped body may be provided above the carrier near the curing furnace. In the case of ultraviolet curing, it is necessary to transmit light, and since such a pressure bonding belt conveyor cannot be used, the method of bending and utilizing tension as described above is effective. In order to bend, the rails provided at the lower ends of both ends of the carrier in the width direction so that the molded product can move with the same curvature in the moving shape from before the curing furnace of the molding carrier until it moves to the ear cutting machine. A method of matching the shape of the above with its curvature is preferable.

The linear lateral member hooked to the guide pin in FIGS. 1 and 2 (8) is applied with a certain amount of tension, but this tension repels the above-mentioned pressure applied to the intersection due to the tension of the vertical member. However, the crimping may not be performed sufficiently. In order to solve this, it is effective to incline the guide pin outward in the width direction of the carrier or use a tapered guide pin. When the lateral member is crimped by the vertical member, the lateral member descends along the inclination of the guide pin and the tension of the lateral member is reduced, so that the lateral member can be sufficiently crimped. The distance between the guide pins of the horizontal member intersecting the vertical member decreases as the horizontal member descends along the inclination of the guide pin, but the amount of decrease may be approximately 2 to 3 mm or more.

The carrier used in the present invention is not limited as long as vertical and horizontal members can be placed on it, but a belt conveyor made of steel or synthetic resin, or a bar conveyor made of a combination of flat steel square pipes and roller chains. Etc. are preferred. The continuous fibers forming the lattice are glass fibers, carbon fibers, aramid fibers, ceramic fibers, etc., and synthetic resins are unsaturated polyester resins, vinyl ester resins, epoxy resins, and other thermosetting resins. And thermoplastic resins such as vinyl chloride resin, polyamide resin, and polyolefin resin.
The lattice-like body obtained according to the method of the present invention should be used as a reinforcing material for civil engineering such as sprayed concrete and earth-concrete in a tunnel, concrete for construction, or as a reinforcing material for high embankment, steep embankment, soft ground, etc. You can

[Example] The resin-impregnated glass roving, which came out of the uncured vinyl ester resin impregnation tank shown in Figs. 1 and 2 (1) and (5), was vertically drawn out along the carrier advancing direction, and the vertical member Was placed at right angles to the vertical member while being hooked on the left and right pins 8 by the horizontal member feeders 7 and 9. The cross member was crossed in the order of horizontal member-vertical member, the uppermost part was a vertical member, and the crossing part was a lattice-shaped body having four layers. UV curing was performed in a curing furnace, the end of the lattice was cut with an ear cutting machine, and the cross-section was cut into a length of 3 m and taken out. The width of the obtained grid-like body was 2 m, the width of the vertical member and the width member was about 10 mm, and the size of the grid was 150 mm × 150 mm, and about 30 sheets could be taken out per hour. This is about 10 times more productive than the conventional manual method.

EFFECTS OF THE INVENTION Since the present invention is a continuous molding method, FRP with stable quality can be obtained.
It is possible to mass-produce the lattice-shaped body in a short time. By using the tension of the vertical member to ensure the crimping of the intersections of the lattice-like bodies and adopting the ultraviolet curing method, a high-quality lattice-like body can be obtained in a shorter time.

[Brief description of the drawings]

FIG. 1 is a schematic front view showing an example of a continuous molding device, and FIG.
The figure is a schematic plan view. 2,10 …… Linear vertical member 3 …… Carrier 6 …… Linear horizontal member 8 …… Guide pin

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location B29L 31:10 (56) Reference JP-A-58-22130 (JP, A) JP-A-52- 66777 (JP, A)

Claims (5)

(57) [Claims] 1. A plurality of linear vertical members made of uncured resin-impregnated continuous fibers are arranged at intervals in parallel with the moving direction on a moving carrier, and the vertical members are made to move together with the carrier, and the vertical members are made. Before or after arranging, by arranging a plurality of linear transverse members made of uncured resin-impregnated continuous fibers intersecting with the longitudinal members at intervals, a grid-like body formed from the longitudinal and transverse members is formed, A method for continuously molding a fiber-reinforced synthetic resin lattice-shaped body, characterized in that the lattice-shaped body is cured and then cut and taken out on an ongoing carrier. 2. A guide pin is provided on a carrier, and the linear transverse member is continuously hooked to the guide pin by moving the linear transverse member by a combination of a traveling direction of the carrier and a direction intersecting with the carrier, and the linear transverse member is placed on the carrier. The continuous molding method according to claim 1, wherein the continuous molding method is arranged. 3. The continuous molding according to claim 1, wherein the arrangement of the linear transverse members and the arrangement of the linear longitudinal members are alternately repeated to form a lattice-shaped body in which the intersections of the longitudinal and transverse members are laminated in three or more layers. Method. 4. The continuous molding method according to claim 1, wherein the crossing portions of the vertical and horizontal members are pressure bonded by the tension of the linear vertical members. 5. The continuous molding method according to claim 1, wherein the carrier is a belt conveyor or a bar conveyor.