JPH09193254A - Apparatus for molding fiber reinforced plastic molded product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the damage of an FRP layer by the compressed air blown onto the FRP layer when the cured FRP layer is demolded from a mold. SOLUTION: Air blow ports 16 are formed in the surface of a mold main body 11 and, when the cured FRP layer 30 formed on the mold main body 11 is demolded, compressed air blown out of the air blow ports 16 is blown onto the FRP layer. When compressed air is blown, the cured FRP layer 30 is pressed by the press plate 25 of a press mechanism 20 and the deformation of the FRP layer 30 by compressed air is prevented to prevent the damage of the FRP layer 30.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding apparatus for producing a fiber-reinforced plastic molded product having a predetermined shape, and in particular, a cured fiber-reinforced plastic layer can be easily removed from a mold without damaging it. The present invention relates to a molding device for a fiber-reinforced plastic molded product.

[0002]

2. Description of the Related Art Molded articles made of fiber reinforced plastics such as bathtubs for home use are usually formed by molding a fiber reinforced plastic (FRP) layer on a mold having a predetermined surface by hand reup method, spray method or the like. After stacking and curing the FRP layer, the FRP layer is released from the mold and further cured F
It is manufactured by removing unnecessary burrs and the like on the peripheral portion of the RP layer.

The FRP layer which is cured while being laminated on the surface of the mold is usually demolded from the mold using an auxiliary tool such as a bar. An auxiliary tool such as a burl is inserted between the burr formed on the peripheral portion of the FRP layer and the mold to eliminate the close contact between the FRP layer and the mold, and then a plurality of workers perform the FRP layer. Is forcibly removed from the mold.

However, when an auxiliary tool such as a bur is inserted between the peripheral portion of the cured FRP layer and the mold and the contact between the FRP layer and the mold is canceled by the auxiliary tool, the surface of the mold becomes May be damaged. Further, although the contact between the peripheral edge of the cured FRP layer and the mold is eliminated by using the auxiliary tool, the center of the mold and the FRP layer are in contact with each other, so that the cured FRP layer is
In order to remove the RP layer from the mold, work by a plurality of workers is required.

In order to solve such a problem, an air blowout port is provided on the surface of the molding die, and compressed air is blown from the air blowout port to the cured FRP layer to cure the FRP layer. A method for eliminating the close contact with the FRP layer is also practiced.

[0006]

As described above, in the method of blowing compressed air to the cured FRP layer and injecting compressed air between the FRP layer and the surface of the molding die, the molding die and the FRP layer are separated from each other. By the compressed air that entered between, FR
The P layer may be in a greatly expanded state, and a large stress may be applied to a corner portion or the like of the FRP layer. When a large stress is applied to the corners of the FRP layer, there is a possibility that cracks may occur or damage may occur in the stressed parts. As a result, the molded product has a high probability of being defective, and the manufacturing yield of the molded product deteriorates.

The present invention solves such a problem and an object thereof is to cure the cured FRP layer even when the cured FRP layer is released from the mold by blowing compressed air.
An object of the present invention is to provide a molding device for a fiber-reinforced plastic molded product that does not damage the corners and the like of the layers.

[0008]

A molding apparatus for a fiber-reinforced plastic molded article according to the present invention is designed so that compressed air is blown to the fiber-reinforced plastic layer on the surface of a predetermined shape on which the fiber-reinforced plastic layer is laminated. When the compressed air is blown from the air outlet to the fiber-reinforced plastic layer, the mold and the fiber-reinforced plastic layer laminated on the mold can be separated from each other. And a pressing plate for pressing the fiber-reinforced plastic layer.

[0009]

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

FIG. 1 is a perspective view showing an example of an embodiment of a molding apparatus for a fiber-reinforced plastic molded product of the present invention, FIG.
FIG. 3 is a sectional view of the molding apparatus. This molding apparatus is used to manufacture a bathtub in a bathroom unit for home use from fiber reinforced plastic (FRP), and has a mold 10 on which a FRP layer 30 is laminated, and a surface of the mold 10. And a pressing mechanism 20 that presses the FRP layer 30 when the FRP layer 30 laminated on the FRP layer 30 is released from the mold 10 after being cured.

As shown in FIG. 2, the molding die 10 has an appropriate thickness throughout, for example, by FRP so that the surface thereof has a hollow shape with the lower surface opened and the surface thereof has a shape corresponding to the shape of the bath. Mold body 11 formed by
And a mounting table 12 on which the molding die 11 is mounted. The surface of the molding die 10 is finished to have a glossy smooth surface, and the FRP layer 30 is laminated on the surface by a hand-up method, a spray method or the like.

An air outlet 16 is provided at an appropriate position on the upper surface of the mold body 11. An end of an air tube 17 (see FIG. 2) to which compressed air is supplied is connected to the air outlet 16.
Compressed air supplied from the air tube 17 is blown out from the air outlet 16.
The compressed air is FR laminated on the surface of the mold body 11.
When the P layer 30 is cured and the cured FRP layer 30 is released from the mold body 11, the P layer 30 is supplied to the air tube 17 and blown out from each air blowout port 16.

An air outlet 16 is also provided on one side of the mold body 11, and a branched end of an air tube 17 to which compressed air is supplied is connected to the air outlet 16. ing.

A mounting table 12 on which the molding die body 11 is mounted.
Is formed of a rectangular flat plate, and wheels 13 are rotatably attached to the lower surface of the flat plate near the corners thereof. The mounting table 12 can be freely moved by each wheel 13.

The air tubes 17 connected to the air outlets 16 provided on the surface of the mold body 11 are
It is in a state of penetrating the mounting table 12 in the vertical direction and extending to the lower side thereof.

The pressing mechanism 20 includes a pair of columns 21 fixedly attached to an appropriate position in a working position, and a support beam 22 horizontally supported between the upper ends of the columns.
And an air cylinder 23 attached to the center of the support beam 22. The air cylinder 23 is supported in a suspended state with respect to the support beam 22 with the piston rod 24 facing downward. Piston rod 24
Is capable of advancing downward, and a central portion of a pressing plate 25 arranged in a horizontal state is detachably attached to its tip end portion.

In the molding apparatus having such a structure, the molding die 1
FRP layer 30 on the entire surface of mold body 11
Are laminated to a predetermined thickness by a hand-up method, a spray method, or the like. In this embodiment, the FRP layer 3 is laminated in the shape of a domestic bathtub and is laminated on the upper surface of the mold body 11.
At 0, a pair of legs 31 is formed. Mold main body 11
When the FRP layer 30 is laminated on the surface of, the FRP layer 30 is left at room temperature to be cured.

When the FRP layer 30 is in a cured state, the entire molding die 10 is positioned below the pressing plate 25 in the pressing mechanism 20. The molding die 10 can be easily moved by the wheels 13 provided on the lower surface of the mounting table 12. When the mounting table 12 is positioned below the pressing plate 25 of the pressing mechanism 20, the air cylinder 23 of the pressing mechanism 20 is pressed.
Is driven to move the piston rod 24 downward. Then, the pressing plate 25 attached to the tip end portion of the piston rod 24 is pressed against the pair of leg portions 31 above the FRP layer 30 laminated on the surface of the mold body 11.

In this way, the pressing plate 25 is formed by the molding die main body 1
When the FRP layer 30 laminated on the surface of No. 1 is pressed with an appropriate pressure, compressed air is supplied to the air tube 17, and the compressed air is blown out from each air blowout port 16. The compressed air blown out from each air outlet 16 is blown to the FRP layer 30 in the cured state,
Enter between the RP layer 30 and the surface of the mold body 11,
Attempts to expand the RP layer 30. However, the FRP layer 3
0 is in a state of being pressed from above by the pressing plate 25, and therefore is prevented from expanding upward by compressed air.

In such a state, each air outlet 1
The compressed air blown out from 6 enters between the FRP layer 30 pressed by the pressing plate 25 and the surface of the mold body 11, and the cured FRP layer 30 is transferred to the mold body 1
1 is surely peeled from the surface. And the cured FRP
The layer 30 is peeled off from almost the entire surface of the mold body 11. At this time, since expansion of the FRP layer 30 by compressed air is suppressed by the pressing of the pressing plate 25, stress is not applied to the corners of the FRP layer 30 and there is no risk of cracks or damage. . Since the hardened FRP layer 30 is peeled off over almost the entire surface of the mold body 11, it is easily released from the mold body 11.

Since the molding die 10 can be freely moved by the wheels 13, it is moved below the pressing plate 25 of the fixed pressing mechanism 20 only when the cured FRP layer 30 is released from the mold. Good. Therefore, the FRP layer 3
Since the curing of 0 and the demolding work of the cured FRP layer 30 are individually performed, the pressing mechanism 20 can be continuously and efficiently operated. Further, the air cylinder 23 in the pressing mechanism 20 adjusts the air pressure to adjust the vertical position of the pressing plate 25, so that the air pressure is adjusted even when the size of the molding die body 11 changes. By adjusting the above, the FRP layer 30 laminated on the molding die main body 11 can be surely pressed with an appropriate pressing force.

Further, since the pressing plate 25 is attachable to and detachable from the piston rod 24 of the air cylinder 23, the pressing plate 25 having an appropriate size according to the size of the molding die main body 11 is used. By using it, the FRP layer 30 laminated on the molding die main body 11 can be reliably pressed over the whole.

[0023]

As described above, the apparatus for molding a fiber-reinforced plastic molded article of the present invention, when the cured FRP layer is released from the mold, even if compressed air is blown to the FRP layer, the FRP layer is Since it is pressed by the pressing plate, F
There is no risk of the RP layer being significantly deformed, and therefore the FRP
There is no risk of cracking or damage to the layers. The compressed air is blown onto the FRP layer while being pressed by the pressing plate, so that the compressed air enters with a strong pressure between the FRP layer and the surface of the molding die main body.
The RP layer is reliably peeled off from the surface of the mold body. Therefore, the cured FRP layer can be easily released from the mold.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of an embodiment of a molding apparatus for a fiber-reinforced plastic molded product of the present invention.

FIG. 2 is a sectional view of the molding apparatus.

[Explanation of symbols]

 10 forming die 11 forming die main body 12 mounting table 13 wheels 16 air outlet 17 air tube 20 pressing mechanism 23 air cylinder 24 piston rod 25 pressing plate 30 FRP layer 31 leg

Claims (1)

[Claims] 1. A molding die provided with an air outlet so that compressed air is blown to the fiber reinforced plastic layer on a surface of a predetermined shape on which the fiber reinforced plastic layer is laminated, and a molding die laminated on this molding die. A press plate that is capable of coming into contact with and separated from the fiber-reinforced plastic layer that has been formed, and that presses the fiber-reinforced plastic layer when compressed air is blown from the air outlet to the fiber-reinforced plastic layer. Molding equipment for characteristic fiber-reinforced plastic moldings.