JPH01236933A - Fan driver of autoclave - Google Patents

Abstract

PURPOSE:To unnecessitate a sealing device such as a conventional mechanical seal by integrally constituting both a pressure vessel containing a molding stock and a miniaturized vessel hermetically closing a fan driving means to completely seal them and thoroughly preventing the leak of high-pressure gas. CONSTITUTION:In a first pressurization means B, high-pressure gas is fed into a pressure vessel A to pressurize a molding stock. Further in a fan driving means E, a through-hole 33 capable of inserting a motor shaft 32 is provided to the rear part of the pressure vessel A and a motor 30 wherein the motor shaft 32 is inserted into the through-hole 33 from the outside and a blowing fan 38 is fixed to the tip end part of the shaft 32 is horizontally supported and also hermetically closed into a miniaturized vessel 31 in the outer position of the rear part of the pressure vessel. In this fan driving means E, many cooling pipes 39 are provided along the inner peripheral part of the miniaturized vessel 31 so that water can be circulated therethrough and also a motor cooling means F for controlling its feed is provided. Furthermore in the fan driving means E, a second pressurization means G for feeding the identical high-pressure gas as the gas fed to the pressure vessel A to the miniaturized vessel 31 is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to laminated structures of fiber reinforced plastics (FRP) used as parts of aircraft, industrial equipment, etc., and molded materials such as multilayer printed wiring boards used as parts of electronic equipment. This invention relates to a fan drive device that circulates heated high-pressure gas into a container when molding the container by heating and pressurizing it in an autoclave.

Conventional technology Conventionally, as a technology for molding materials such as FRP and printed wiring boards by heating and pressurizing them in an autoclave, for example,
JP-A-58-62018, JP-A-60-2589
No. 96, JP-A-61-43543, JP-A-6
Many such methods are known, including those described in Japanese Patent No. 1-43565.

As shown in FIGS. 4 and 5, these technologies include a pressure vessel A that is capable of accommodating a molding material l and is equipped with a wind tunnel for circulating gas, and a pressure vessel A that supplies high pressure gas into the pressure vessel. a first pressurizing means B that pressurizes the molding material l; a heating and cooling means C that heats and cools the high-pressure gas supplied into the container via a heat exchanger 5 installed at the rear inside the pressure container; A blower fan at the tip of a shaft in which gas heated or cooled by a heating and cooling means is projected from a motor shaft or an intermediate shaft by an external motor 50 of the pressure vessel A through a sealing device 51 such as a mechanical seal or a gland seal. 38
The fan drive means I is provided to blow air and circulate it through the wind tunnel 7, and the pressure reduction means depressurizes the inside of the vacuum bag 12 in which the molded material 1 is sealed to create a high vacuum.

Then, as shown in FIG. 6, the molded material l is placed on the jig 9 of the surface plate 11, covered with a breather cloth 53, and further,
Covered with a vacuum bag 12 and sealed with a sealant 54 (silicon sealant), the vacuum bag 12 is transported into a pressure vessel A as shown in FIGS. After connecting the pressure vessel A and sealing the inside of the pressure vessel A, the inside of the vacuum bag 12 is depressurized, and then high pressure gas (inert gas) is supplied into the pressure vessel A to pressurize the molded material 1 and release the gas. The molded material 1 is heated, passed through the outer shell of the double wind tunnel 7 by the fan 38, turned over at the inner wall of the door 2, and circulated heated high-pressure gas through the inner cavity to heat and pressurize the molding material 1 to harden the adhesive and form it. This is what I did.

Problems to be Solved by the Invention However, these techniques have the following problems.

In a pressure vessel, the molded material is bonded and cured with heated high-pressure gas, so it is necessary to keep the high-pressure gas sealed. However, as shown in FIG. Externally, a drive shaft 52 (motor shaft, intermediate shaft) passes through a sealing device 51, and as the shaft rotates, mechanical seals and gland seals wear out and over time the high pressure gas inside the pressure vessel A leaks. It leaks out little by little. Then, the amount of leakage gradually increases and the gas pressure decreases, which adversely affects moldability.

Therefore, mechanical seals and gland seals are regularly adjusted and repaired to maintain airtightness as much as possible, but these repairs require a great deal of time and man-hours, hindering productivity.

The present invention was developed with the aim of solving the above-mentioned problems.

Means for Solving the Problems The present invention provides a molded material 1 as shown in FIGS. 1 to 6.
a pressure vessel A equipped with a wind tunnel 7 for accommodating gas and circulating gas; a first pressurizing means B for supplying high pressure gas into the pressure vessel to pressurize the molding material; Heating and cooling means C that heats and cools the high pressure gas
In an autoclave, a through hole 33 through which a motor shaft can be inserted is provided at the rear of the pressure vessel A, and a motor shaft 32 is inserted from the outside into the through hole 33 at an external position at the rear of the pressure vessel. A fan driving means E is provided, which horizontally supports a motor 30 having a blower fan 37 fixed to its tip and sealing the motor in a small container 31. A large number of cooling pipes 39 are provided so that water can circulate therein, and a motor cooling means F is provided to control the supply of water. A second pressurizing means G is provided for supplying pressure to the air.

Further, an autoclave is provided with a pressure vessel A equipped with a wind tunnel 7 capable of accommodating a molded material 1 and circulating gas, and a heating/cooling means C heating and cooling the high pressure gas supplied into the pressure vessel A. A through hole 33 through which a motor shaft can be inserted and which also serves as ventilation is provided at the rear part of the pressure vessel, and at an external position of the rear part of the pressure vessel, a motor shaft 32 is inserted from the outside into the through hole 33, and the tip of the shaft is inserted into the through hole 33 from the outside. A fan driving means E is provided, which horizontally supports a motor 30 to which a blower fan 37 is fixed, and the motor is sealed in a small container 31. A large number of cooling pipes 39 are provided to allow water to circulate, and a motor cooling means F is provided to control the supply of water, and the fan driving means E is provided with a pressurizing means H for supplying high pressure gas to a small container. It is.

With this configuration, after the molding material L is housed in the pressure vessel A and sealed, high pressure gas is supplied to the pressure vessel A and the small vessel 31, or the high pressure gas is supplied to the pressure vessel A and the small vessel 31.
1 and supplied to the pressure vessel A through the through hole 33, the high-pressure gas is heated and the motor 30 is driven to rotate the blower fan 38 to blow the heated high-pressure gas in the pressure vessel A through the wind tunnel 7. The molded material 1 is heated under pressure by being circulated through the molded material 1.

- On the other hand, the pressure is maintained at the same pressure as the heated high-pressure gas supplied to the small container 31 so that the heated gas does not enter into the small container 31, and the motor cooling means F is activated by the detection signal of the temperature sensor 42, and the cooling pipe is Cooling water is supplied to the motor 39 to cool the motor 30, and the temperature of the motor is controlled to be below the allowable temperature, thereby maintaining the seal inside the small container and preventing burnout of the motor.

Example Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIGS. 1 to 6, the apparatus for carrying out the present invention includes a pressure vessel equipped with a door 2 for accommodating and sealing a molded material 1 and a double air tunnel 7 for circulating gas. A first pressurizing means B or pressurizing means H that supplies high pressure gas into the pressure vessel A to pressurize the molded material 1, and a heat source installed at the rear inside the pressure vessel to supply the high pressure gas supplied into the pressure vessel. Exchanger 5
(or by heating and cooling with an electric heater), a depressurizing means to reduce the pressure in the vacuum bag 12 for sealing the molding material 1 to create a high vacuum, and the heating and cooling means It consists of a fan drive device that blows heated or cooled gas into the pressure vessel.

Next, details of each means and device will be explained.

As shown in FIGS. 4 and 5, the pressure vessel A has a surface plate 11.
A trolley 3 (also referred to as a platen) on which a molded material 1 sealed in a vacuum bag 12 is placed can be carried in and out of the rail 4 and sealed with a door 2, and a heat exchanger 5 A double wind tunnel 7 is formed by a thin cylindrical wind tunnel plate 6 along the inner circumference of the pressure vessel A at a position in front of the pressure vessel A, and a fan drive device of the present invention, which will be described later, is installed at a rear position of the pressure vessel A. is arranged. Note that a heat insulating material 8 is applied to the entire inner peripheral surface inside the pressure vessel.

As shown in FIG. 6, the surface plate 11 has a smooth surface and is provided with a vacuum path 14 approximately in the center of the surface plate. As shown in Figures 5 and 6, the air inside the sealed laminated molded material is
It is provided so that it can be communicated with and cut off from external pressure reducing means via vacuum joints 13b and 13a. In addition, in the case of aircraft structures or large parts, the molded material 1 is covered with a breathable breather cloth on the surface plate, although not shown.
A vacuum bag is placed on top of the vacuum bag, and a vacuum can be drawn from a suitable position on the vacuum bag.

As shown in FIGS. 1 and 4, the first pressurizing means B generally supplies high-pressure gas such as high-pressure nitrogen gas, high-pressure carbon dioxide gas, high-pressure air, etc. of 20 kg/- or less into the pressure vessel A. The device 15 is provided so that it can be supplied via an automatic valve 16, and the gas is heated or cooled via a heat exchanger 5.

The air is then exhausted via the automatic valve 17. Additionally, a safety valve 18 is provided to reduce the pressure inside the pressure vessel A when it exceeds a predetermined pressure.

As shown in FIG. 4, the heating and cooling means C supplies high pressure steam and cooling water from the outside of the pressure vessel A to the heat exchanger 5 on the second truck 20 at the rear of the inside to heat the gas inside the pressure vessel. Alternatively, an automatic valve 21 for supplying high-pressure steam and an automatic valve 22 for supplying cooling water are communicated with the heat exchanger 5 through the pressure vessel A, and the pressure is applied from below the heat exchanger. The lower part of the container A is connected so that steam drain and cooling water can be discharged via an automatic valve 23.

In addition, as another example of the heating and cooling means, a means for heating and cooling may be provided outside the pressure vessel A, and the heated and cooled gas may be supplied into the pressure vessel A. Moreover, as a heating means, an electric heater 1o may be used instead of high-pressure steam, as shown in FIG. However, in this case, the heat exchanger 5 is used only for cooling.

The pressure reducing means is a pressure vessel A as shown in FIGS. 4 and 5.
A vacuum pump 24 installed outside of the pressure vessel A is connected to the inside of the pressure vessel A via an automatic valve 25. As shown in FIGS. 5 and 6, a vacuum joint 13a is provided at the tip of the piping, and the vacuum joint 13a communicates with the inside of the vacuum bag 12 and is connected in an airtight manner. It is provided to be detachable from the vacuum joint 13b. Then, by operating the vacuum pump 24, the pressure inside the vacuum bag 12, which covers and seals the molded material 1, can be reduced to a high vacuum.

The fan drive device, as shown in FIGS. 1 to 3,
A small container 31 with a built-in motor 30 at the rear of the pressure container A
(a small pressure vessel); a motor cooling means F for cooling and controlling the motor within the small vessel to a permissible temperature or below; and a second fan driving means E for supplying high pressure gas into the small vessel. It is composed of pressurizing means G or pressurizing means H.

As shown in FIGS. 1 and 3, the fan driving means E includes a through hole 33 in the rear part of the pressure vessel A through which a motor shaft 32 can be inserted.
A motor stand 34 is fixedly supported in a horizontal position on the outside of the rear part of the pressure vessel, and a cylindrical flange 35 is fixed on the outside of the motor stand 34 at the rear part of the pressure vessel. On the other hand, the motor stand 34 has a motor shaft 32 (output shaft).
A small fan 36 for stirring the gas is attached to the motor shaft at a position outside the pressure vessel A, and a small fan 36 for stirring the gas is installed at a position inside the pressure vessel A on the motor shaft. A blower fan 37 is installed. Also,
A cap 38 (lid) for the motor is attached to the flange 35, and is integrated with the flange 35 to form a small container 31 that can withstand high pressure gas, so that the motor 30 can be sealed between the pressure container A and the small container 31. It is composed of

The motor cooling means F has a large number of cooling pipes 39 arranged around the outer circumference of the motor 30 and along the inner circumference of the small container 31 so that water can circulate therein, and the lower ends of the cooling pipes 39 are connected to the outside of the small container 31. Cooling water is supplied through an automatic valve 40, and heated water is discharged from the other end through an automatic valve 41, or is cooled with a chiller or the like (not shown) so that the water can be reused. It is plumbed. Furthermore, a temperature sensor 42 is attached to an appropriate position of the small container 31, and the temperature sensor detects the gas temperature in the small container so that it does not exceed the permissible temperature of the motor 30, and automatically transmits the detection signal. valve 4
0 and supplies cooling water to the cooling pipe 39 to cool the gas inside the small container 31 and remove the self-heat generated by the motor 30.

The cooled gas is stirred by the rotation of the small fan 36, and the motor 30 can be cooled more effectively.

The shape of the cooling pipe 39 may be rectangular, and its arrangement may be as long as it is located on the inner periphery of the small container and on the outer periphery of the motor. The present invention is not limited to the embodiments of the present invention.

As shown in FIG. 1, the second pressurizing means G branches the high pressure gas to be supplied to the main body pressure vessel A from the piping of the high pressure gas supply device 15 in parallel with the first pressurizing means B. through the automatic valve 43, the small container 3
The pressure inside pressure vessel A is set to be the same as that inside pressure vessel A. This is because when the heated high-pressure gas in the pressure vessel A and the high-pressure gas in the small vessel 31 are at the same pressure, the gap between the through hole 33 through which the motor shaft 32 is inserted is small, so that the gas moves between the two vessels. is not carried out. Therefore, the small container 31
The high-pressure gas inside the pressure vessel A is not significantly affected by the heated high-pressure gas inside the pressure vessel A, that is, is not heated too much, and maintains a state close to the ambient temperature in the atmosphere, and also has the cooling effect of the cooling water. Thus, heating of the motor 30 can be prevented.

As shown in FIG. 3, the pressurizing means H is configured so that it can be supplied independently from the piping of the high-pressure gas supply device 15 via an automatic valve 44, so that the pressures in the small container 31 and the pressure container A are the same. In this case, the first pressurizing means B for supplying pressure to the pressure vessel A is unnecessary. The high pressure gas is supplied to the pressure vessel A by first being supplied into the small vessel 31 by the pressurizing means H, and then, as shown by the chain line arrow in FIG. It is configured so that it can be supplied into the pressure vessel A through the gap with the hole 33. By doing this, the pressurizing means is simplified, and since the cooling gas passes through the small container 31, the small container 31 is closed until both containers have the same pressure.
The gas in the motor shaft 32 is cooled and even after the same pressure
Since the gap between the container and the through hole 33 is small, gas does not move between the containers. Therefore, as in the case of the second pressurizing means, the high-pressure gas in the small container 31 is not heated too much, and maintains a state close to the ambient temperature in the atmosphere, and in addition to the cooling effect of the cooling water, the motor heating can be prevented.

In this case, the reduced pressure of the high pressure gas heated in the pressure vessel A is exhausted from the pressure vessel A through the automatic valve 17 shown in FIG.

In this way, the gas in the small container 31 is cooled to protect the motor 30, and the high-pressure gas is completely sealed between the pressure container A and the small container 31 to maintain airtightness.

Then, by rotating the blower fan 38 installed in the pressure vessel A, the heated or cooled gas passes through the outer diameter of the double wind tunnel 7 shown in FIGS. The material is turned around at the inner wall of the material, passes through the inner cavity, and circulates between the material and the molded material 1 by making a U-turn as shown by the arrow.

Next, its effect will be explained.

First, as shown in FIG. 6, a jig 9 (mold) is placed on the surface plate 11, and the molding material 1 is laminated along the jig, and a release film is placed on top of the molding material 1. , a breather cloth 53, etc., and then covered with a vacuum bag 12 and completely sealed with a sealant 54.

Next, the surface plate 11 on which the molded material 1 is placed is placed on the trolley 3, and is carried into the pressure vessel A as shown in FIGS. 4 and 5.

Then, the vacuum joint 13b is connected to the vacuum joint 13a of the piping inside the pressure vessel, and the door 2 is closed to seal the pressure vessel A.

By blowing, the vacuum pump 24 and automatic valve 25 shown in FIG. The intervening air is discharged to the outside through vacuum joints 13b to 13a by means of a vacuum action.

Next, the automatic valve 16 of the first pressurizing means B and the automatic valve 43 of the second pressurizing means G shown in FIG.
The molding material I is pressurized via the heating and cooling means C, and the automatic valve 21 of the heating and cooling means C is operated to apply high pressure steam to the heat exchanger 5, thereby heating the high pressure gas in the pressure vessel A. Then, the motor 30 of the fan driving means E is operated to rotate the blower fan 38, and the heated gas passes through the outer diameter of the double wind tunnel 7 in the pressure vessel A, is reversed on the inner wall of the door 2, and enters the inner cavity. and circulate.

The molding material l is then heated through the vacuum bag 12. At this time, since the pressures in the small container 31 and the pressure container A are kept at the same pressure, there is almost no movement of gas between the two containers. Therefore, since there is little gas intrusion into the small container 31, the motor 30 is rarely heated from the atmosphere, but if the gas is heated by the self-heating of the motor 30 and the heating exceeds the allowable temperature of the motor, The temperature sensor 42 of the motor cooling means A detects the temperature, transmits the detection signal to the automatic valve 40 to operate it, and the cooling pipe 3
9 is supplied with cooling water to cool the gas inside the small container 31. Then, the cooled gas is stirred by the rotation of the small fan 36, and the motor 30 is controlled to keep the temperature below the allowable temperature.

Then, the heating of the molding material 1 progresses, but the heat transfer to the molding material 1 is uniform from the entire surface, and as the temperature rises, it becomes a -like molten state, and even if the shape of the molding material is complicated, it is Due to its hydrostatic properties, the entire surface is evenly pressurized and heated.

Subsequently, the temperature of the molded material 1 is further increased until it reaches a specified temperature, and is maintained at that temperature for a while to bond and harden the molded material.

Next, the automatic valve 21 shown in FIG. 4 is operated in reverse to stop the supply of high-pressure steam and stop heating, and then the automatic valve 22 is operated to supply cooling water to the heat exchanger 5 and pressure vessel A. As shown in FIG. 4, the cooled high-pressure gas is blown by a blower fan 38 and circulated inside the pressure vessel A through the double wind tunnel 7, and the molded material 1 is then cooled. Cooling.

Next, the automatic valve 25 is operated to gradually reduce the pressure inside the pressure vessel A.

When the molded material 1 is cooled, all operations are stopped, the door 2 is opened, and the molded material 1 is carried out to the outside, completing one process.

Effects of the Invention Since the present invention is constructed as described above, the pressure container that houses the molding material and the small container that seals the fan driving means are integrally constructed and are completely sealed, thereby preventing any leakage of high-pressure gas. This eliminates the need for conventional sealing devices such as mechanical seals and gland seals, which eliminates the time loss and man-hours required to repair mechanical seals and gland seals, and can be expected to improve productivity. .

Furthermore, since the pressurizing means for supplying gas is used alone, cooling of the fan drive motor is facilitated, and the pressurizing means is simplified and economical.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway schematic side view showing one embodiment of the device according to the present invention. FIG. 2 is a schematic front sectional view taken along the line xx in FIG. 1. FIG. 3 is a partially cutaway schematic side view of another embodiment of the present invention, and FIG. 4 is a partially cutaway schematic side view of a conventional device. 5 is a schematic front view showing a state in which the door of FIG. 4 is opened, and FIG. 6 is a schematic front sectional view showing a state in which the molded material is sealed on a surface plate in a vacuum bag. In these drawings, A: pressure vessel, B: first pressurizing means, C: heating and cooling means,
D, pressure reduction means, E-fan driving means, F: motor cooling means, G, first pressurizing means, H-pressurizing means, ■-fan driving means, 1. molded material, 2: door. 3. Trolley, 4. Rail, 5. Heat exchanger, 6: Wind tunnel board, 7
: Double wind tunnel, 8: Insulation material, 9: Jig, 10° electric heater, 11. Surface plate, 12: Vacuum bag. 13a, 13b: Vacuum joint, 14: Vacuum path, 15: High pressure gas supply device, 16.17: Automatic valve, 18: Safety valve, 2
0 Second truck, 21, 22, 23: Automatic valve, 24・Vacuum pump, 25 Automatic valve, 30・Motor, 31. Small container, 32・Motor shaft, 33° through hole, 34・Motor stand, 3
5: Flange, 36° small fan, 38: Blower fan,
39: Cooling pipe, 40, 41, 42, 43, 44: Automatic valve, 50, External motor, 51: Sealing device, 52: Drive shaft. Procedural amendment damage (voluntary)

Claims (1)

[Scope of Claims] 1. A pressure vessel capable of accommodating a molded material and equipped with a wind tunnel for circulating gas, and a first pressurizing means for supplying high pressure gas into the pressure vessel to pressurize the molded material. , an autoclave equipped with heating and cooling means for heating and cooling high-pressure gas supplied into the pressure vessel, wherein a through hole through which a motor shaft can be inserted is provided in the rear part of the pressure vessel, and an external position of the rear part of the pressure vessel is provided. is provided with a fan drive means which horizontally supports a motor having a motor shaft inserted into the through hole from the outside and a blower fan fixed to the tip of the shaft, and the motor is sealed in a small container, and the fan drive means A large number of cooling pipes are provided along the inner periphery of the small container to allow water to circulate, and a motor cooling means for controlling the supply of water is provided, and the fan driving means is provided with the same high pressure supplied to the pressure container. A fan drive device for an autoclave, characterized in that a second pressurizing means for supplying gas to a small container is provided. 2. An autoclave comprising a pressure vessel capable of accommodating a molded material and equipped with a wind tunnel for circulating gas, and a heating and cooling means for heating and cooling high pressure gas supplied into the pressure vessel, wherein the pressure vessel A through hole through which a motor shaft can be inserted and also used for ventilation is provided at the rear of the pressure vessel, a motor shaft is inserted into the through hole from the outside at an external position at the rear of the pressure vessel, and a blower fan is fixed to the tip of the shaft. A fan driving means is provided in which the motor is horizontally supported and the motor is hermetically sealed in a small container, and the fan driving means is provided with a number of cooling pipes along the inner periphery of the small container so that water can be circulated therein. A motor cooling means is provided to control the
A fan drive device for an autoclave, characterized in that the fan drive means is provided with pressurizing means for supplying high pressure gas to a small container.