JPH0725108B2 - Article discharge device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a molded product discharging device.

(Prior Art) In an injection molding machine, a molded product that has been molded needs to be discharged to the outside of the injection molding machine, for example, for box packing. As an example of the discharge device, a molded product discharge passage (for example, a duct)
There is a method of dropping it into the box via.

(Problems to be Solved by the Invention) However, the above-described conventional molded product discharging device has the following problems.

In recent years, the molding speed of an injection molding machine has been required to be higher and higher, and a large number of molded products can be molded and discharged in a short time. However, in the work of storing the discharged molded product in a cardboard box or the like, since the time required to replace the cardboard box supplied by the conveyor is longer than the time required for molding and discharging the molded product, The cardboard box may not be replaced in time before the molded product is discharged, and the molded product may be scattered. With respect to this point, there is a problem that effective measures cannot be taken because the conventional molded product discharging device is not provided with any means for restricting it.

Therefore, it is an object of the present invention to provide a molded product discharge device capable of restricting the flow of a molded product discharged from a discharge passage.

(Means for Solving the Problems) In order to solve the above problems, the present invention has the following configuration.

That is, a molded product discharged by a molded product molded by an injection molding machine is discharged through a discharge passage directly connected to the injection molding machine to a storage container such as a cardboard box placed at a predetermined position outside the injection molding machine. The apparatus includes a regulating means such as a shutter for opening and closing the discharge passage to regulate the discharge of the molded product, and a driving means for driving the regulating means in the opening and closing direction of the discharge passage, and ejecting the driving means. When the number of shots of the molding machine reaches a predetermined number, a signal is sent to drive the regulating means in the closing direction of the discharge passage so that the molded product can be temporarily retained in the discharge passage and the storage container can be replaced. And, on the other hand,
When an empty storage container is placed at a predetermined position, a control means for emitting a signal for driving the regulating means in the opening direction of the discharge passage is provided.

(Operation) According to the present invention, when a predetermined number of molded products have been packed in the storage container, the discharge passage is closed by the restricting means such as the shutter, so that the molded product stays in the discharge passage.

During this time, when the storage container in which the molded product has been filled is discharged and an empty storage container is placed at a predetermined position, the discharge passage is opened and the molded product is discharged to the newly placed storage container.

As described above, in the present invention, since the molded product can be temporarily retained in the discharge passage, it is possible to prevent the molded product from being scattered due to a delay in the replacement of the storage container when the storage container is replaced. Can be prevented.

(Examples) Hereinafter, preferred examples of the present invention will be described in detail with reference to the accompanying drawings.

First, the configuration will be described.

In FIG. 1, 10 is an injection molding machine, which is capable of molding a large number of pieces.

Reference numeral 12 denotes a duct that is an example of a molded product discharging device, and molded products 14 ... Molded by the injection molding machine 10 can be discharged to the outside of the injection molding machine 10. In this embodiment, after the molding is completed, the molded products 14 ... Protruded from the molding die (not shown) drop to the discharge passage (not shown) in the duct 12 by using gravity, and the tip is provided downward. The inside of the duct 12 is slid and discharged from the discharge port 16.

A cross section of the main part of the duct 12 is shown in FIG.

Reference numeral 18 denotes a shutter, which is an example of a regulating unit, and is formed in a triangular shape on the side surface. A fixing member 20 is provided on the upper surface of the shutter 18.
Is fixed. A shaft 22 is fitted and inserted in the fixing member 20, and both ends of the shaft 22 have both side plates 24, 26 of the duct 12.
Is rotatably attached to. Shutter 18 is duct 12
Since it is attached so that it can rotate with respect to the shaft 22,
The shutter 18 is also rotatable around the shaft 22 with the rotation of the. As a result, the shutter 18 ducts
The 12 outlets 16 can be opened and closed. The shutter 18 is designed so that the tip end side (the right end side in FIG. 2) is heavier than the shaft 22, and the tip end of the shutter 18 closes the discharge port 16 in a normal state in which an external force is not applied to the shutter 18. It is like this. On the other hand, when an external force is applied to the shutter 18 and the shutter 18 rotates to the position 18a shown by the chain double-dashed line in FIG. 2, the discharge port 16 is opened. A cutout 28 is provided on the upper surface of the discharge port 16 of the duct 12 so as not to hinder the rotation of the shutter 18.

Reference numeral 30 denotes an air cylinder, which is an example of a drive unit of the shutter 18. The air cylinder 30 is fixed to the upper surface of the duct 12. The tip of the rod 32 of the air cylinder 30 is attached to the fixing member 20.
It is rotatably attached via a shaft 36 to a standing piece 34 which is erected on the upper surface of. Therefore, the air cylinder 30
When air is supplied through 38 and 40, the rod 32 expands and contracts,
The shutter 18 rotates around the shaft 22 to open and close the discharge port 16 of the duct 12.

Referring again to FIG. 1, reference numeral 42 denotes a valve controller of a compressor (not shown), which is provided in the injection molding machine 10.
The valve control unit 42 is a tube 3 that supplies air to the air cylinder 30.
Switch between 8 and 40 to expand and contract the rod 32.

Reference numeral 44 denotes a conveyor, which conveys cardboard boxes 46b, 46c ... In which the molded products 14 ... Are placed and the cardboard box 46a in which the molded products 14 ... On the conveyor 44, a sensor (not shown) for detecting whether the cardboard boxes 46b, 46c are at predetermined positions or a stopper 48 for stopping the cardboard boxes 46b, 46c at predetermined positions.
・ Etc. are provided. The molded products 14 ... Drop onto the cardboard box 46b stopped just below the duct 12.

A controller 50 is incorporated in the injection molding machine 10. The controller 50 is equipped with a microprocessor and manages the shot number of the injection molding machine 10 and controls the valve controller 42 and the conveyor 44.

The operation of the apparatus configured as described above will be described.

In a normal state (a state where the shutter 18 closes the outlet 16 of the duct 12), when an empty cardboard box 46b is sent to the position directly below the duct 12 by the conveyor 44, a sensor provided on the conveyor 44 detects the presence of the cardboard box 46b. Detects and sends a detection signal to the controller 50.

The controller 50 controls the valve control unit 42 to shorten the rod 32 of the air cylinder 30 and rotate the shutter 18 counterclockwise to open the discharge port 16 of the duct 12.

Subsequently, the controller 50 commands the injection molding machine 10 to perform a molding operation. The number of molded products 14 ... Put in the cardboard box 46b is predetermined, and the controller 50 counts the number of shots of the injection molding machine 10 to manage the number of molded products 14 ...

The formed molded products 14 ... Are dropped and accommodated in the cardboard box 46b through the discharge passage 52 in the duct 12.

When the controller 50 determines that a predetermined number of shots 14 ... Has been discharged, it controls the valve control unit 42 to extend the rod 32 of the air cylinder 30 and close the discharge port 16 of the duct 12 with the shutter 18. Then, the conveyor 44 is driven to send the cardboard box 46b in the direction of arrow A, and the next cardboard box 46c
Move to just below duct 12. While the cardboard box 46c is being transported, the molding work is performed continuously,
Even if a molding operation is performed while the cardboard box 46c is conveyed, the molded products 14 ... Can be retained in the discharge passage 52 because the shutter 18 closes the duct 12.

When the sensor detects that the next cardboard box 46c has reached just below the duct 12, the controller 50 opens the shutter 18 to drop the accumulated molded articles 14 ... The controller 50 also manages the number of shots for the molding work while the shutter 18 is closed.

In addition, if the operator manually operates the air cylinder 30 as an emergency, a malfunction can be sufficiently dealt with.

Further, the opening degree of the shutter 18 can be adjusted by adjusting the extension amount of the rod 32 of the air cylinder 30.

Further, a determination unit is provided upstream of the duct 12 to determine whether the molded product 14 ... Is a good product or a defective product. Only the good product of the molded product 14 ... Is sent to the discharge port 16 direction, and the defective product is stored in another storage place. You may send it to. At that time, the controller 50 may manage the number of good shots by the number of shots obtained by subtracting the number of defective shots from the total number of shots.

Although various preferred embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and the structure of the regulating means can be freely selected depending on the molded product.
For example, if the molded product is large, the regulating means may be one bar (horizontal bar), and many modifications can be made without departing from the spirit of the invention.

(Effect of the Invention) When the molded product discharging device according to the present invention is used, it is possible to restrict the discharge of the molded product in the discharge passage by the restriction means.
When it is desired to regulate the number of molded products to be discharged, the flow of the molded products in the discharge passage can be regulated by the regulation means. As a result, it is possible to prevent the molded products from being scattered when the replacement of the cardboard box containing the molded products is delayed. In addition, it is possible to prevent the discharge of the molded product exceeding a predetermined amount and to control the discharged amount of the molded product, which is very effective.

[Brief description of drawings]

FIG. 1 is a front view of a main part of an injection molding machine showing an embodiment of a molded product discharging apparatus according to the present invention, and FIG. 2 is a sectional view of a main part of the molded product discharging apparatus. 10 …… injection molding machine, 12 …… duct, 14 …… molded product, 18…
… Shutter, 52 …… Discharge passage.

Claims (1)

[Claims] 1. A molded product molded by an injection molding machine is discharged through a discharge passage directly connected to the injection molding machine into a storage container such as a cardboard box placed at a predetermined position outside the injection molding machine. In the molded product discharge device, a control unit such as a shutter that controls the discharge of the molded product by opening and closing the discharge passage, and a drive unit that drives the restriction unit in the opening and closing direction of the discharge passage, are provided in the drive unit. On the other hand, when the number of shots of the injection molding machine reaches a predetermined number, the regulation means is driven in the closing direction of the discharge passage so that the molded product can be temporarily retained in the discharge passage and the storage container can be replaced. And a control means for emitting a signal for driving the regulating means in the opening direction of the discharge passage when an empty storage container is placed at a predetermined position. apparatus.