JPH0427627Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a spray-up molding device having a function of preventing short fibers cut by a roving cutter from clogging a discharge port.

(Prior art) In general, a spray gun in a spray-up molding device includes a roving cutter that cuts roving into a predetermined length and discharges it as short fibers from a cylindrical discharge port, and a roving cutter that cuts roving into a predetermined length and discharges it as short fibers from a cylindrical discharge port, and a spray gun that mixes resin and hardening agent in a predetermined ratio. A roving cutter that cuts the roving into a predetermined length and discharges it as short fibers from a cylindrical discharge port, and a resin and a hardening agent. There is also an external mixing type that consists of two sprays that are discharged separately.

Figure 3 shows a spray-up molding device equipped with a spray gun, including a roving cutter e that cuts glass roving (hereinafter referred to as roving) a into a predetermined length and discharges it as short fibers c from a discharge port b into a mold d. , thermosetting resin (hereinafter referred to as resin)
A spray gun g consisting of a spray f which mixes and discharges a hardening agent and a curing agent is attached to a movable robot h.

As shown in FIG. 4, the roving cutter e consists of an outer case i and a rotary cutter j built into the outer case i, and is attached above the spray f. The exterior case i is provided with an inlet k for introducing roving a to the rear side of the rotary cutter j and an air outlet m for supplying gas, and discharges the cut short fibers to the front side of the rotary cutter j. A cylindrical discharge port b is provided.

(Problems to be Solved by the Present Invention) However, in the spray-up molding apparatus of the prior art described above, the length of the short fibers cut to a predetermined length is in the range of 10 to 30 mm. However, since air bubbles and cavities are likely to be formed in a laminate spray-up molded into a mold having recesses or corner parts, shorter short fiber lengths have been desired. However, in the case of short fibers cut into pieces of 10 mm or less with a roving cutter, the flow of the short fibers passing through the discharge port becomes swollen like cotton, so there is a problem that the discharge port is easily clogged.

The present invention was devised to solve the above problems, and its purpose is to prevent the roving from clogging the outlet of the roving cutter even if it is cut into relatively short staple fibers. An object of the present invention is to provide a spray-up molding device.

(Means for Solving the Problems) The spray-up molding device of the present invention includes a roving cutter that cuts roving to a predetermined length and discharges it as short fibers from a cylindrical discharge port, and a roving cutter that cuts roving to a predetermined length and discharges it as short fibers from a cylindrical discharge port, and a resin and a hardening agent that are mixed in a predetermined ratio. In a spray-up molding device equipped with a spray gun that discharges spray into a mold, an outer cylinder is provided around the outer periphery of a cylindrical discharge opening of a roving cutter, and an outer cylinder is provided between the cylindrical discharge opening and the outer cylinder. An annular gas ejection port is formed in the short fiber, and gas is ejected from the gas ejection port in the direction in which the short fibers are ejected.

(Function) According to the above-described structure of the present invention, the roving is cut into a predetermined length by a roving cutter to become short fibers, and the fibers are transferred to the cylindrical discharge port side. When gas is ejected from the annular gas outlet, an annular airflow is formed and the pressure near the tip of the cylindrical outlet is reduced, and the short fibers in the cylindrical outlet are sucked into the reduced pressure side. It is then blown onto the mold along with an annular air stream.

(Embodiment) Next, an embodiment of the spray-up molding apparatus of the present invention will be described with reference to the drawings.

1 and 2 show a spray-up molding apparatus according to the present invention.

In this spray-up molding apparatus, a spray gun 1 is attached to a robot 2 which is configured to be freely movable.

In this embodiment, the spray gun 1 includes a roving cutter 5 that cuts roving 3 into a predetermined length and discharges it as short fibers 4, and a spray 7 that discharges a resin and a hardening agent into a mold 6 while mixing a predetermined ratio. A so-called internal mixing system is used.

A resin supply hose 8 for supplying resin to the spray 7 and a hardening agent supply hose (not shown) for supplying a hardening agent to the spray 7 are connected to the spray 7, and the spray 7 mixes the resin and the hardening agent. While doing so, these are discharged from the nozzle hole 9 of the spray 7.

As shown in FIG. 2, the roving cutter 5 consists of an outer case 10 and a rotary cutter 11 built into the outer case 10, and is attached above the spray 7. The exterior case 10 is provided with an introduction port 12 for introducing the roving 3 into the rear side of the rotary cutter 11 and a gas flow port 13. A discharge port 14 is provided. The rotary cutter 11 shown in FIG. 2 consists of a rubber roller 15 and a rotary blade 16.
The rotary blade 16 has a blade portion 17 that abuts parallel to the width direction of the rubber roller 16, and the blade portion 17 is implanted at a predetermined pitch in the circumferential direction of the rotary roll 18.

Note that if the diameter of the inlet 12 is considerably larger than the thickness of the roving 3, gas will flow in from the inlet 12 together with the roving 3, so the gas flow port 13 does not need to be provided.

19 is the cylindrical discharge port 1 of the roving cutter 5
4 is an outer cylinder provided on the outer periphery of the cylindrical discharge port 14.
One end of the outer cylinder 19 is brought into contact with the vicinity of the base of the cylindrical discharge port 14 via a sealing material or the like so as to form an annular gas discharge port 20 between the outer cylinder 19 and the outer cylinder 19 . A gas pressure feeding hose 21 is connected to one end of the outer cylinder 19 via a connecting pipe 22, and in the middle of the inner circumference of the outer cylinder 19,
A flange 23 provided on the outer peripheral surface of the cylindrical discharge port 14
is fitted onto the inner circumferential surface of the outer cylinder 19 to support the outer cylinder 19. The flange 23 has a gas outlet 20.
A large number of communication holes 24 are provided which lead to.

The degree of protrusion of the other end of the outer cylinder 19 may be aligned with the tip of the cylindrical outlet 14, but if it is made to protrude beyond the tip of the outlet 14 as shown in FIG. 2, the short fibers 4 will be dispersed. This is preferable because it can be discharged without having to do so.

Next, the operation of the spray-up molding apparatus constructed as above will be explained.

The spray 7 mixes the resin and curing agent supplied to the spray 7 and discharges them from the nozzle hole 9.

On the other hand, in the roving cutter 5, the roving 3 is supplied to the rotary cutter 11 from the introduction port 12 of the outer case 10.
It is cut into a predetermined length and discharged into the cylindrical discharge port 14. At the same time, when gas is supplied through the gas pressure feeding hose 21 connected to the outer tube 19 provided on the outer periphery of the cylindrical discharge port 14, the gas is ejected from the annular gas outlet 20 and the outer tube 19 is An annular air flow is formed in the direction of the arrow w along the inner peripheral surface of the cylindrical discharge port 14, and the vicinity of the tip S of the cylindrical discharge port 14 is reduced in pressure. Therefore, even if the short fibers 4 are cut into pieces of 3 to 10 mm and discharged to the cylindrical discharge port 14, the cylindrical discharge port 1
Since the short fibers 4 in the cylindrical airflow are sucked into the cylindrical airflow, they can be smoothly discharged from the tip of the cylindrical outlet 14, and the cylindrical outlet 14 will not be clogged.

Further, when the outer cylinder 19 is made to protrude from the tip of the discharge port 14, an air flow is formed along the inner circumferential surface of the outer cylinder 19, so that the short fibers 4 do not become clogged in the outer cylinder 19. The flow of the short fibers 4 can be discharged to a predetermined position of the mold 6 without being disturbed or scattered.

(Effects of the invention) The spray-up molding apparatus of the present invention has the above-mentioned configuration, and in particular, an outer cylinder is provided around the outer periphery of the cylindrical discharge opening of the roving cutter, and an annular tube is formed between the cylindrical discharge opening and the outer cylinder. A gas jet port is formed, and the gas is jetted from the gas jet port in the direction in which the short fibers are discharged. Therefore, when gas is jetted from the annular gas jet port, an annular air flow is formed and the cylindrical air flow is formed. The pressure is reduced near the tip of the discharge port, and the short fibers are cut relatively short with a roving cutter.
Even if the short fibers passing through the cylindrical outlet are likely to expand into fluff, they will not become clogged in the cylindrical outlet because they are sucked into the cylindrical airflow. Therefore, it is possible to perform continuous spray-up molding into a mold having recesses and corners, and it is possible to efficiently obtain a molded product without air bubbles or cavities, and the defoaming step during finishing can be omitted. Therefore, it is possible to reduce molding costs.

[Brief explanation of the drawing]

Fig. 1 is a front view of the spray-up molding apparatus of the present invention, Fig. 2 is an enlarged sectional view of the main parts of the same as above, Fig. 3 is a front view showing the conventional example, and Fig. 4 is an enlarged sectional view of the main parts of Fig. 3. It is. Explanation of symbols, 1... Spray gun, 2... Robot, 3... Roving, 4... Short fiber, 5...
Roving cutter, 7... Spray, 14...
Cylindrical discharge port, 19... outer cylinder, 20... annular gas jet port.

Claims (1)

[Claims for Utility Model Registration] 1. A roving cutter that cuts roving into a predetermined length and discharges it as short fibers from a cylindrical discharge port, and a spray that discharges a resin and a hardening agent into a mold at a predetermined ratio. In a spray up molding device equipped with a spray gun, an outer cylinder is provided around the outer periphery of a cylindrical discharge opening of a roving cutter, and an annular gas jet opening is formed between the cylindrical discharge opening and the outer cylinder. A spray-up molding apparatus characterized in that the gas is ejected from the gas ejection port in the direction in which the short fibers are ejected. 2. The spray-up molding apparatus according to claim 1, wherein the outer cylinder protrudes from the tip of the cylindrical discharge port.