JP2003062781A - Mold product sucking device and mold product sucking method for handling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a new mold product sucking device for a handling device that can reduce energy consumption by operating a vacuum source intermittently without lowering the sucking efficiency of a mold product. SOLUTION: A mold product sucking device for the handling device that sucks a high polymer mold product 5 and attached to the handling device that takes out the high polymer mold product 5 from a mold, providing a sucking pad 9 that sucks the high polymer mold product 5, a vacuum pump 20 that is connected to the sucking pad 9 through an air tube and makes the inside of sucking pad 9 vacuously and cause the high polymer mold product 5 sucked, and an accumulator 1 that stores vacuous pressure. The accumulator 1 is connected between the sucking pad 9 and the vacuum pump 20 and a control device 2 that controls the operation of the vacuum pump 20 according to the vacuous pressure stored in the accumulator 1 is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molded product suction device and a molded product suction method provided in a take-out device for removing a molded product from a mold.

[0002]

2. Description of the Related Art As shown in FIG. 5 (a), as a molded product adsorption device of this type of take-out device, a vacuum pump 42 which is a vacuum source, a switching valve 41, and an adsorption pad 40 are formed by an air tube in that order. As shown in FIG. 5 (b), the suction pad 40 is connected to the suction pad 40 at the vacuum port of the vacuum generator 45 that is the vacuum source in which the compressor 44, the switching valve 41, and the vacuum generation unit 43 are connected in that order. Those that are connected are being used.

The molded product suction device of these take-out devices sucks the molded product by constantly operating the vacuum pump 42 and the vacuum generator 45 to bring the suction pad 40 close to the molded product remaining in the mold. Thereafter, the molded product is moved together with the molded product suction device and taken out from the mold, and the switching valve 41 is switched to the shut-off state to weaken the suction force and then separated from the suction pad 40.

[0004]

However, when the vacuum source is intermittently operated in order to save energy consumption, the molded product adsorption device of the conventional take-out device has the adsorption pad 4
It takes time to reach the vacuum pressure necessary for adsorbing the molded product inside 0, and efficient adsorption cannot be performed. Therefore, the vacuum source was always operated, and was also operated other than during adsorption,
There is a problem that a large amount of vacuum pressure is lost and a large amount of energy is consumed by the vacuum pump 42 and the like.

Therefore, an object of the present invention is to solve the above-mentioned problems and form a molded product of a novel take-out device capable of intermittently operating a vacuum source to reduce energy consumption without lowering the adsorption efficiency of the molded product. An object is to provide an adsorption device.

[0006]

In order to achieve the above object, a molded product suction device of a take-out device of the present invention is a suction device that is provided in a take-out device that takes out a molded product from a mold and sucks the molded product. A suction pad for adsorbing the molded product, a vacuum source connected to the suction pad via an air tube to vacuum the inside of the suction pad to adsorb the molded product, and an accumulator for storing vacuum pressure, An accumulator is connected between the suction pad and the vacuum source, and a control device for controlling the operation of the vacuum source according to the vacuum pressure stored in the accumulator is provided.
The “vacuum” referred to in the present specification means a pressure required to adsorb a molded product.

The capacity of the accumulator is not particularly limited, but is preferably 20 to 80 l, more preferably 40 to 60 l. The range of the vacuum pressure stored in the accumulator is not particularly limited, but -0.02 to -0.0.
8 MPa is preferable. This negative value is the differential pressure from the standard atmospheric pressure.

There may be a plurality of take-out devices, at least one accumulator may be provided in the take-out device, and the accumulators may be connected to one vacuum source. The number of accumulators in this case is not particularly limited, but is preferably 2 to 10 and more preferably 3 to 8.

The material of the suction pad is not particularly limited, but an elastic material such as natural rubber or silicone rubber can be exemplified. The shape of the suction pad is not particularly limited, but a suction pad shape is preferable.

The number of suction pads connected to one accumulator is not particularly limited, but is preferably 1-20.

The vacuum source is not particularly limited, but a vacuum pump, a vacuum generator using a compressor and a vacuum generating unit in combination, and the like can be exemplified.

It is preferable that a switching valve for connecting and disconnecting the suction pad and the accumulator is connected between the suction pad and the accumulator. As a switching valve,
Although not particularly limited, a 2-port 2-position switching valve or a switching valve having 3 or more ports can be exemplified. A switch valve having three or more ports is preferable in order to break the vacuum inside the suction pad and release the molded article sucked by the suction pad.
Further, a plurality of switching valves may be connected in parallel to one accumulator. In that case, the number of switching valves is not particularly limited. In addition, the same electric signal may be input to these switching valves, or different electric signals may be input to each.

The control device is not particularly limited,
A pressure sensor and an electric circuit for starting or stopping the vacuum source according to the detection value of the pressure sensor can be exemplified. The mounting location of the control device is not particularly limited, but an accumulator or an air tube close to the accumulator can be exemplified.

It is preferable that a check valve is connected between the vacuum source and the accumulator to prevent the vacuum pressure stored in the accumulator from rising.

The molded product adsorption method of the present invention is a method for adsorbing a molded product in a take-out device for taking out the molded product from a mold, wherein vacuum pressure is stored in an accumulator connected between a vacuum source and a suction pad. By using the vacuum pressure stored in the accumulator to create a vacuum inside the suction pad, the suction pad adsorbs the molded product, and the control device changes the vacuum source according to the vacuum pressure stored in the accumulator. It is characterized by controlling driving.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment in which the present invention is embodied in a molded product adsorption device provided in a take-out device for taking out a polymeric molded product from a mold will be described with reference to FIGS. explain.

The molded product adsorption device of the take-out device of this embodiment is connected to the adsorption pad 9 for adsorbing the polymer molded product 5 and the adsorption pad 9 via an air tube to evacuate the inside of the adsorption pad 9. A vacuum pump 20 as a vacuum source for adsorbing the polymer molded product 5 and an accumulator 1 for storing vacuum pressure are provided, and the adsorption pad 9 and the vacuum pump 20 are provided.
The accumulator 1 is connected between and. Further, the accumulator 1 is provided with a control device 2 that controls the operation of the vacuum pump 20 according to the vacuum pressure stored in the accumulator 1.

A check valve 3 is connected between the vacuum pump 20 and the accumulator 1 to prevent the vacuum pressure stored in the accumulator 1 from decreasing. Since the check valve 3 is connected, the air is allowed to flow in only one direction from the accumulator 1 to the vacuum pump 20.

A switching valve 14 is connected between the suction pad 9 and the accumulator 1 to switch between communication and disconnection between the suction pad 9 and the accumulator 1. Switching valve 14
Are five ports 15a, 15b, 15c, 15d, 1
A three-position switching type solenoid valve having 5e, one end 14a, the central portion 14b, or the other end 1 depending on an input electric signal.
4c, and the ports 15a, 15
Communication between the b, 15c, 15d, and 15e and disconnection can be switched. Further, one or more (two in the illustrated example) switching valves 14 are connected to the accumulator 1.

A pressure reducing valve 30 is connected to each switching valve 14, and the ends thereof are collectively connected to one compressor 4. The pressure reducing valve 30 lowers the pressure of the compressed air sent from the compressor 4 and sends it to the switching valve 14. In addition,
A speed control valve may be used instead of the pressure reducing valve 30.

As shown in FIG. 2 (a), the suction pad 9 is formed in a suction cup shape, and a vent hole 9a is formed in the central portion thereof so as to extend in the vertical direction and allow air to flow therethrough.
An air tube is connected to the upper open end of the vent hole 9a,
One or more (two in the illustrated example) suction pads 9 are connected to one switching valve 14 via an air tube. Further, one or more (two in the illustrated example) suction pads 9 are similarly connected to the other switching valve 14.

The switching valve 14 is normally in the state of the central portion 14b (when no electric signal is input), and the port 1
All of 5a, 15b, 15c, 15d and 15e are blocked (hereinafter referred to as "blocking position").

When the switching valve 14 is switched to the state of the one end portion 14a by a predetermined electric signal, the port 15
a and port 15c, and port 15b and port 15
d and the port 15e are cut off. At this time, the suction pad 9 is communicated with the accumulator 1, and the air therein is exhausted toward the accumulator 1 to form a vacuum, and the pressure reducing valve 3
The air sent to the switching valve 14 through 0 is blocked by the blindly plugged port 15b (hereinafter referred to as "exhaust position").

When the switching valve 14 is switched to the state of the other end 14c by a predetermined electric signal, the port 15
a and port 15d, and port 15b and port 15
e are communicated with each other, and the port 15c is blocked. At this time, the suction pad 9 is connected to the pressure reducing valve 30.
The compressed air is introduced into the interior of the accumulator 1 and the accumulator 1 is shut off (hereinafter, referred to as "introduction position").

The control device 2 is composed of a pressure sensor attached to the accumulator 1 and an electric circuit connected to the power source of the vacuum pump 20. The control device 2 keeps observing the vacuum pressure stored in the accumulator 1 by the pressure sensor provided therein and compares it with a predetermined vacuum pressure. According to the comparison result, the control device 2 determines that the vacuum pump 2
0 is started or stopped.

With the above configuration, the accumulator 1 is connected between the vacuum pump 20 and the suction pad 9, so that the vacuum pump 20 stores a vacuum pressure inside the accumulator 1. The vacuum pressure stored in the accumulator 1 is used for making the inside of the adsorption pad 9 into a vacuum and adsorbing the polymer molded product 5 by switching the switching valve 14 to the exhaust position. When the vacuum pressure stored in the accumulator 1 is used for adsorption of the polymer molded product 5 and falls below a predetermined vacuum pressure, the control device 2 attached to the accumulator 1 activates the vacuum pump 20. The vacuum pressure stored in the accumulator 1 is raised, and the vacuum pump 20 is stopped when a predetermined vacuum pressure is reached. Also, by switching the switching valve 14 to the introduction position, the compressed air sent from the compressor 4 and reduced in pressure by the pressure reducing valve 30 is blown out from the inside of the adsorption pad 9, and the polymer molded product 5 is separated from the adsorption pad 9. It is like this.

The molded product suction device of the take-out device constructed as described above operates as follows. When the operation of the molded product adsorption device of the take-out device is started, the control device 2 causes the vacuum pump 2 to operate.
Start 0. At that time, the air inside the accumulator 1 is exhausted toward the vacuum pump 20 via the check valve 3, so that the accumulator 1 starts to store vacuum pressure. At this time, since the switching valve 14 is in the shutoff position and shuts off the accumulator 1 from the atmosphere, the vacuum pressure stored in the accumulator 1 is quickly increased.

Next, when the vacuum pressure stored in the accumulator 1 reaches a predetermined vacuum pressure set in the control device 2, the control device 2 stops the vacuum pump. At this time, since the check valve 3 is connected between the accumulator 1 and the vacuum pump 20, the air inside the vacuum pump 20 flows back to the accumulator 1 and the accumulator 1
Prevents the vacuum pressure stored in the tank from being reduced.

Next, the mold is opened, and the suction pad 9 is brought close to the polymer molded product 5 remaining in the mold, as shown in FIG. 2 (a). At this time, by switching the switching valve 14 to the exhaust position, the vacuum pressure stored in the accumulator 1 causes a vacuum inside the suction pad 9, and
As shown in (b), the polymer molded product 5 is adsorbed by the adsorption pad 9.

By using the vacuum pressure stored in the accumulator 1 to adsorb the polymer molded product 5, the adsorption pad 9 and the accumulator 1 are connected rather than the air tube connecting the adsorption pad 9 and the vacuum pump 20. The air tube to be used can be shorter. Along with this, until the suction pad 9 comes into close contact with the polymer molded product 5 until the internal pressure of the suction pad 9 reaches a vacuum pressure sufficient for the suction pad 9 to suck and move the polymer molded product 5. The time is shortened and the response at the time of adsorption is improved. Moreover, since the suction pad 9 uses the vacuum pressure stored in the accumulator 1, the vacuum pressure by the vacuum pump 20 is not directly lost.

When the vacuum pressure stored in the accumulator 1 falls below a predetermined vacuum pressure, the control device 2 provided in the accumulator 1 automatically activates the vacuum pump 20 to generate the vacuum stored in the accumulator 1. Attempts to return the pressure to the desired vacuum pressure. After that, when the vacuum pressure stored in the accumulator 1 reaches a predetermined vacuum pressure, the control device 2 automatically stops the vacuum pump 20.

Therefore, during the operation of the molded product adsorption device of the take-out device, the control device 2 starts or stops the vacuum pump 20 so that the vacuum pressure stored in the accumulator 1 is always maintained at a predetermined vacuum pressure. It has become. Thereby, the vacuum pump 20 is intermittently operated, and once the predetermined vacuum pressure is stored in the accumulator 1, it is only necessary to start it after making up for the decrease in the vacuum pressure stored in the accumulator 1. Total energy consumption is reduced and energy efficiency is improved. As a result, the energy consumed by the suction pad 9 per suction is also reduced.

Next, the polymer molded product 5 is moved together with the suction pad 9 while being sucked by the suction pad 9. At this time, the polymer molded product 5 is removed from the mold.

Next, the switching valve 14 is switched to the introduction position. Then, the port 15c connected to the accumulator 1 is cut off, and at the same time, the port 15a and the port 1c are disconnected.
The compressed air, which is sent out by the compressor 4 and reduced in pressure by the pressure reducing valve 30, is introduced into the suction pad 9 by being communicated with the suction pad 9. The polymer molded product 5 adsorbed to the adsorption pad 9 by this air is separated from the adsorption pad 9. At this time, the pressure reducing valve 30 reduces the pressure of the compressed air blown onto the polymer molded product 5, so that the polymer molded product 5 is prevented from jumping too much from the suction pad 9.

Next, a second embodiment embodying the present invention will be described with reference to FIGS. 3 and 4. The present embodiment differs from the first embodiment only in the vacuum source, the number of accumulators connected to the vacuum source, and the method for separating the polymer molded product 5.

That is, in the molded product adsorption device of the take-out device of this embodiment, the vacuum generation device 27 as a vacuum source in which the vacuum generation unit 21, the switching valve 6 and the compressor 4 are connected in that order is used instead of the vacuum pump 20. It is connected to the. Note that the vacuum pump 20 may be used instead of the vacuum generator 27 as in the first embodiment.

The vacuum generating unit 21, as shown in FIG. 4, has an air supply chamber 22 for taking in compressed air and an air supply chamber 2
2 and a small diameter portion 23 that extends from 2 and is thinly twisted, and a small diameter portion 23.
An exhaust chamber 25 formed at the tip of the vacuum chamber 2 and a vacuum chamber 2 formed so as to cover the central portion of the small diameter portion 23 from the outside of the small diameter portion 23.
And a through hole 24 communicating with the inside of the small diameter portion 23 from the vacuum chamber 26 is provided in the center of the small diameter portion 23.

Compressed air is sent into the air supply chamber 22, so that the compressed air flows from the air supply chamber 22 to the exhaust chamber 25 through the small diameter portion 23. At that time, the air inside the vacuum chamber 26 is drawn into the compressed air passing through the inside of the small-diameter portion 23 to become a vacuum. Therefore, when the suction pad 9 is connected to the vacuum chamber 26, the inside of the suction pad 9 can be evacuated in the same manner as when the vacuum pump 20 is connected to the suction pad 9.

The switching valve 6 is a two-position switching valve having two ports. Normally (when no electric signal is input), the two ports are in communication with each other, and by inputting a predetermined electric signal, It will be in the cutoff state.

In this embodiment, there are a plurality of take-out devices (two in the illustrated example), at least one accumulator 1 (one in the illustrated example) is provided in each take-out device, and one accumulator 1 is provided. Vacuum generator 27 as a vacuum source
It is connected to the. Therefore, by inputting an electric signal for connecting the two ports of the switching valve 6 to the switching valve 6, the compressor 4 evacuates the inside of the vacuum chamber 26 and stores the vacuum pressure inside the two accumulators 1. It is like this.

The vacuum generating device 27 is activated by the control device 2 only once the predetermined vacuum pressure is stored in the connected accumulator 1 and thereafter only when the reduced vacuum pressure is returned. Further, in view of the response of the suction, it is desirable that the suction pad 9 and the accumulator 1 be connected as close as possible to each other by a short air tube, but the accumulator 1 and the vacuum generator 27 may be installed separately from each other. Does not directly affect the adsorption response. Therefore,
The vacuum generator 27 can be installed at a position apart from the take-out device.

That is, since the accumulator 1 is connected between the vacuum generating device 27 and the suction pad 9, the vacuum generating device 27 can be operated intermittently, and there is a margin in operation, and there is also a restriction on the installation location. Will be alleviated. Moreover, since the vacuum pressure for adsorbing the polymer molded product 5 has a small absolute value, it was theoretically possible to cover a plurality of take-out devices with one vacuum source. Therefore, the two accumulators 1 provided in the two take-out devices are molded articles of all the take-out devices connected to the two accumulators 1 even though only one vacuum generator 27 is connected. It enables the adsorption device to adsorb the polymer molded product 5 without deteriorating the response. Further, since it is not necessary to prepare the same number of the vacuum generators 27 as the take-out devices, the cost of equipment can be reduced and the electric signal wiring and the pneumatic circuit can be simplified.

A check valve 3 is connected between the vacuum generator 27 and the two accumulators 1 to prevent the vacuum pressure stored in the accumulator 1 from decreasing. In the present embodiment, since two accumulators 1 are connected to one vacuum generator 27, the air tube extending from the vacuum generator 27 is bifurcated midway and connected to each accumulator 1. There is. The check valves 3 are respectively connected to the air tubes extending directly from the accumulators 1. Therefore, it is possible to prevent the air from flowing from the vacuum generator 27 to the accumulator 1 to reduce the vacuum pressure of the accumulator 1, and also to prevent the air from flowing between the accumulators 1. That is, the vacuum pressures stored in the accumulators 1 are also prevented from decreasing each other.

All the ports 15d of each switching valve 14 are open to the atmospheric pressure. Therefore, when the switching valve 14 is switched to the introduction position, the inside of the adsorption pad 9 communicating with the port 15d is opened to the atmospheric pressure, and the polymer molded product 5 adsorbed on the adsorption pad 9 is separated from the adsorption pad 9. Then it is allowed to fall. Compared with the first embodiment, this embodiment can reduce the number of pressure reducing valves 30, so that the cost of equipment can be reduced and the pneumatic circuit can be simplified. Although the equipment cost increases and the pneumatic circuit becomes slightly complicated, the pressure reducing valve 30 and the compressor 4 may be connected in that order to the port 15d of each switching valve 14 as in the first embodiment.

The molded product suction device of the take-out device of this embodiment is basically the same as that of the first embodiment. Also, according to the present embodiment, not only the same effects as in the first embodiment can be obtained, but also the adsorption devices provided in the plurality of extraction devices can be covered by one vacuum source, so that the cost of the equipment can be reduced. Can be reduced and the electric signal wiring and the pneumatic circuit can be simplified.

The present invention is not limited to the configuration of the above-described embodiment, but may be modified and embodied without departing from the spirit of the invention, for example, as follows. (1) Change the installation location of the control device to the air tube near the accumulator. (2) In order to easily release the molded product from the suction pad, a spring member for pushing the molded product away, a vibration device, a rapid acceleration / deceleration device, and a displacement device for displacing the molded product in a state where it easily falls freely are provided. .

[0047]

The molded product suction device of the take-out device of the present invention comprises:
This has an excellent effect that the vacuum source can be intermittently operated to reduce the energy consumption without lowering the adsorption efficiency of the molded product.

Further, according to the molded product suction device of the take-out device according to the second aspect, a single vacuum source can cover the suction devices provided in the plurality of take-out devices.

[Brief description of drawings]

FIG. 1 is a pneumatic circuit diagram showing a molded product adsorption device of a take-out device according to a first embodiment of the present invention.

FIG. 2A is a perspective view showing a polymer molded product by a suction pad of the molded product suction device before suction, and FIG. 2B is a perspective view showing a sucked state.

FIG. 3 is a pneumatic circuit diagram showing a molded product adsorption device of a take-out device according to a second embodiment of the present invention.

FIG. 4 is an explanatory view showing a vacuum generating device of the molded article suction device.

FIG. 5 is a pneumatic circuit diagram showing a molded product suction device of a conventional take-out device.

[Explanation of symbols]

1 accumulator 2 controller 5 Polymer molded products 9 Adsorption pad 20 Vacuum pump as a vacuum source

Claims (5)

[Claims] 1. A suction device for adsorbing the molded product, which is provided in a take-out device for ejecting the molded product from a mold, and is connected to a suction pad for adsorbing the molded product and the suction pad via an air tube. And a vacuum source for vacuuming the inside of the suction pad to suck the molded product, and an accumulator for storing a vacuum pressure, the accumulator being connected between the suction pad and the vacuum source, the accumulator A molded product adsorbing device for a take-out device, comprising a control device for controlling the operation of the vacuum source according to the vacuum pressure stored in. 2. A plurality of the take-out devices, wherein at least one accumulator is provided in the take-out device,
The molded product adsorption device of the ejection device according to claim 1, wherein each accumulator is connected to one of the vacuum sources. 3. A switching valve for connecting and disconnecting the suction pad and the accumulator is connected between the suction pad and the accumulator.
A molded product suction device of the take-out device described. 4. The check valve according to claim 1, further comprising a check valve connected between the vacuum source and the accumulator to prevent a decrease in vacuum pressure stored in the accumulator. A molded product suction device for the take-out device 5. A method for adsorbing a molded product in a take-out device for taking out the molded product from a mold, wherein vacuum pressure is stored in an accumulator connected between a vacuum source and a suction pad, and stored in the accumulator. Using the vacuum pressure
By making the inside of the suction pad into a vacuum, the suction pad sucks the molded article, and the control device controls the operation of the vacuum source according to the vacuum pressure stored in the accumulator. Method for adsorbing molded products in a take-out device.