JPS623208Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a continuous pultrusion molding device for FRP rod-shaped bodies.

Conventionally, there is a device that continuously pultrudes a single FRP rod with a diameter of about 5 to 15 mm, but this device has a very slow drawing speed of 2 m/min or less, so the production cost is high and it cannot be provided economically. It was not a device that could mold FRP rods, and it was never put into practical use.

The present invention was made to solve such conventional problems, and its purpose is to solve multiple problems.
By completing a device that can pultrude FRP rods at the same time and coat them with thermoplastic resin at the same time, the above problems can be solved and FRP rods with stable quality can be formed at low cost. An object of the present invention is to provide a pultrusion molding device.

That is, in order to achieve this purpose, the present invention
Continuous pultrusion molding equipment for FRP rod-shaped bodies is equipped with an ultraviolet curing furnace behind an impregnating tank that impregnates glass roving with thermosetting resin, and a far infrared curing furnace with a mold attached behind it, and the ultraviolet curing A glass roving impregnated with a thermosetting resin is passed through a furnace and a far-infrared ultraviolet curing furnace to harden and mold it into an FRP rod of the desired shape, and an extruder equipped with a crosshead mold is installed behind the far-infrared curing furnace. Using a crosshead mold, the outside of the above FRP rod is coated with thermoplastic resin, and multiple pieces are coated at the same time.
The structure was made by pultrusion molding an FRP rod-shaped body.

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

FIG. 1 is an explanatory plan view showing a continuous pultrusion forming apparatus A for FRP rod-shaped bodies, which is an embodiment of the present invention, in which stands 1, 1 on which a bobbin on which glass roving 9 is wound are mounted are installed on the left and right sides. And this frame 1,1
An impregnating tank 2, an ultraviolet curing furnace 3, 3', a far infrared curing furnace 4, a crosshead mold 5, a cooling water tank 6, a take-up device 7, and a winding device 8 are installed in order on the same line at the rear of the film.

First, the frames 1, 1 are partitioned into several shelves, and a bobbin (not shown) on which the glass roving 9 is wound is placed on each shelf, and the tip of each glass roving 9 is impregnated. It is installed facing the direction of tank 2.

The impregnation tank 2 is equipped with a screen 10 at the front and a drawing die 13 at the rear, and as shown in FIG. 12... are partitioned into a plurality of rows, and presser bars 11, 11 are attached to two places on the front and back of the partition plates 12, 12....

The screen 10 divides the glass rovings 9, 9, which are fed out from the bobbins placed on the mounts 1, 1 into several pieces, and passes them through the glass rovings, so that the glass rovings are not tangled with each other. It is made up of a large number of grids. Further, tapered insertion holes 14, 14... are bored in horizontal rows in the drawing die 13, and each insertion hole 14 has a diameter of 20
The thermosetting resin impregnated in the impregnation tank 2 is squeezed out through the tapered insertion hole 14 through ~30 glass rovings, and at the same time, a glass roving bundle consisting of the glass roving bundle and the thermosetting resin is formed. 1
5, 15... are corrected into substantially cylindrical shapes.

Next, as shown in FIG. 3, the ultraviolet curing furnace 3 is equipped with a high-pressure mercury lamp 16 inside, and a plurality of copper pipes 17 are arranged horizontally in the center of the high-pressure mercury lamps 16, 16... , both ends protrude outward from the inside of the ultraviolet curing furnace 3. Further, an ultraviolet curing furnace 3' is installed behind the ultraviolet curing furnace 3, and no copper pipe is installed in this curing furnace 3', but only a high-pressure mercury lamp is installed. In this example, eight copper pipes 17 having an inner diameter of 5.5 mm were arranged in parallel, and the atmospheric temperature inside the curing furnaces 3 and 3' was set at 150 to 250°C.

The far-infrared curing furnace 4 is composed of a front curing furnace 4a in which a far-infrared heater 19 is attached to the bottom of a long and narrow box-shaped body 24 and plate-shaped forming dies 18, 18 are provided on the top of the heater 19, and a rear curing furnace 4b in which far-infrared heaters are provided above and below and the glass roving bundle 15 is passed between the upper and lower heaters. The plate-shaped forming dies 18, 18 are provided with a plurality of semicircular grooves 25, 25 on the inner faces of the upper and lower plates 18a, 18b facing each other as shown in Fig. 5, and the upper and lower plates 18a, 18b are fixed in place in the drawing direction so as not to overlap each other, and the glass roving bundle 15 is fixed in place.
The upper half of the pieces 5, 15 are passed through the plate 18a, and the lower half is passed through the semicircular grooves 25, 25 of the plate 18b, and then the pieces are hardened and molded into a rod-like body 21 having a circular cross section.

The crosshead mold 5 is attached to the tip of the extruder 20 and has a flow path through which the thermoplastic resin flows through a mandrel (inner mold).
At the same time, a through passage for passing a plurality of FRP rods 21 is provided in the axial direction inside the mandrel, and a covering head portion 22 is provided at the tip.
The outside of the FRP rod-shaped body 21 is coated with a thermoplastic resin to form a coated FRP rod-shaped body 23.

The cooling tank 6 cools the coated FRP rod-shaped body 23 with water, and in this embodiment,
The coated FRP rod-shaped body 23 whose surface temperature is around 200°C is rapidly cooled to room temperature by spraying cold water in a shower-like manner.

The take-up device 7 rotates an endless belt in a crawler-like manner while bringing the upper and lower phases into contact with each other, and a plurality of covered FRP rod-like bodies 23, 2 are inserted between the crawler-like belts.
3.Put it in the direction of the arrow while pulling it into a bundle.

The winding device 8 is formed to wind up the coated FRP rod-shaped body 23 taken up by the taking up device 7.

The embodiment of the present invention is constructed as described above, and the eight covered FRP rod-shaped bodies 23, 23... are taken off in the direction of the arrow by the taking-off device 7,
Glass roving 9 from the bobbin placed on 1,
9... is pulled out, and the 25 glass rovings are passed through the partition plates 12, 12... of the impregnation tank 2 in a bundle through the screen 10, impregnated with the polyester resin stored in the impregnation tank 2, and this glass roving bundle is 15
is straightened into a substantially cylindrical shape through a drawing die 13, and glass roving bundles 15, 15... are passed through eight copper pipes 17, 17... projected at the entrance of the ultraviolet curing furnace 3, respectively, and cured. The surface layers of the glass roving bundles 15, 15 are heated through the furnaces 3, 3' to form and harden them into cylindrical shapes, and then the semicircular grooves 2 of the molds 18, 18... of the far infrared curing furnace 4 are heated.
5 and 25, and is passed through the rear hardening furnace 4b to be completely cured and formed into the FRP rod-shaped body 21.

Next, eight of these FRP rods 21 are passed through the mandrel of the crosshead mold 5 to form the coated head part 22.
Thermoplastic resin S is coated with 8 pieces of coated FRP.
Rod-shaped bodies 23, 23... are molded. In this example, a 5.5 mm coated FRP rod was successfully molded continuously at a molding speed of approximately 8 m/min. The thermoplastic resin S is made of ABS, vinyl chloride, etc., and is coated to a thickness of about 0.15 to 0.35 mm.

Although one embodiment of the FRP rod-shaped body of the present invention has been described above, the present invention is not limited to the above-mentioned embodiment. book, 4
It is possible to simultaneously produce a large number of coated FRP rods such as one, five, etc., and the outer diameter of the rod is also 3 mm.
It can be formed up to 50mm without any restrictions.

As described above, the present invention is based on multiple coated FRP
Although rod-shaped bodies can be molded at the same time with stable quality, in the example, the glass roving bundle is placed in a semicircular or semi-polygonal shaped groove formed in a molding die without any glass fiber clogging. It is now possible to continuously form FRP rods of desired shapes without curling. That is, when the molding molds are stacked one above the other, the glass roving bundle immediately gets stuck in the shaping groove and cannot be molded. In addition, by installing shaped pipes with excellent heat transfer rate such as copper pipes inside the ultraviolet curing furnace,
It became possible to adjust the external shape within a short time and realized high-speed pultrusion.

As explained above, according to the present invention, multiple coated FRP rods can be molded at the same time at low cost and with stable quality, and even in a crosshead mold, multiple FRP rods can be coated at the same time. By forming this structure, we were able to put into practical use the simultaneous pultrusion of a large number of coated FRP rods.

[Brief explanation of the drawing]

Fig. 1 is an explanatory plan view of a continuous pultrusion molding device for FRP rods showing an embodiment of the present invention, Fig. 2 is a cross-sectional view of an impregnating tank, and Fig. 3 is a cross-sectional view of an ultraviolet curing furnace 3.
Fig. 4 is a partial perspective view of a far-infrared curing furnace, Fig. 5 is a perspective view of a molding die, and Figs. 6 and 7 are cross sections of a coated FRP rod shaped by the pultrusion molding apparatus of the present invention. It is a diagram. 1, 1... Frame, 2... Impregnation tank, 3, 3'...
Ultraviolet curing furnace, 4... far infrared curing oven, 5... crosshead mold, 6... cooling water tank, 7... take-up device, 8... winding device, 9... glass roving,
17... Copper pipe, 18, 18... Molding mold, 1
9... Far infrared heater, 20... Extruder, 21...
...FRP rod-shaped body, 23... Covered FRP rod-shaped body, A...
...Continuous pultrusion molding equipment, R...Thermosetting resin, S...
…Thermoplastic resin.

Claims (1)

[Scope of utility model registration request] An ultraviolet curing furnace is installed behind the impregnation tank for impregnating the glass roving with thermosetting resin, and a far infrared curing furnace with a mold attached is installed behind it, and the thermosetting resin is placed in the ultraviolet curing furnace and the far infrared curing furnace. The desired shape is formed through a glass roving impregnated with resin.
The FRP rod is cured and molded, and an extruder equipped with a crosshead mold is installed behind the far-infrared curing furnace, and the outside of the FRP rod is coated with thermoplastic resin using the crosshead mold. A continuous pultrusion molding device for FRP rods that simultaneously pultrudes multiple coated FRP rods.