JPH0415455Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a vertical injection molding machine, and more particularly to a vertical injection molding machine in which operations such as taking out a molded product and inserting the molded product are automatically performed.

(Prior art) Vertical injection molding machines, in which the mold clamping and mold opening are performed by moving the upper mold and the lower mold in the vertical direction, Compared to a horizontal injection molding machine in which the mold moves laterally, it is easier to hold the insert in the mold when molding a molded product with a metal insert inserted.
Another advantage is that the floor space of the molding machine is small.

However, the vertical injection molding machine has the drawback that the molded product cannot be allowed to fall naturally as in the horizontal injection molding machine, and the efficiency of work such as taking out the molded product is inferior.

In order to overcome this drawback, molding machines are being supplied in which a movable plate such as a turntable or a slide plate is provided on the machine stand, and a plurality of molds are attached to the movable plate.

(Problem to be solved by the invention) According to the molding machine equipped with the movable plate,
While at least one of the multiple molds on the movable plate is being clamped and injection molded, open the other mold to take out the molded product, insert an insert, etc. Therefore, it is possible to improve the molding efficiency of the vertical injection molding machine.

However, even in such a vertical injection molding machine, it is difficult to allow the molded product to fall naturally, so the above operation has to be performed manually.

Therefore, an object of the present invention is to propose a vertical injection molding machine that can automatically perform operations such as removing a molded product from a mold and inserting an insert.

(Means for Solving the Problem) In order to achieve the above-mentioned object, the inventors of the present invention first constructed a vertical injection molding machine using an articulated robot, which is commonly used in automobile assembly work, as shown in Figs. 4 and 5. I tried to use it.

In the multi-jointed robot shown in FIGS. 4 and 5, a first arm 46 is attached to a robot support 24 erected on a stand 50, and a second arm 54 is attached to the tip of the first arm 46. These first arms 46 and second
The arm 54 can freely rotate in the horizontal direction by servo motors 40 and 42.

A mounting shaft 52 is provided at the tip of the second arm 54 to which an operating tool such as a chuck is attached.
This mounting shaft 52 can be moved up and down by an air cylinder 44 and can be rotated by a step motor 56.

The rotation of the step motor 56 is controlled by the belt 5.
8 and 58 to the mounting shaft 52.

Such articulated robots are usually used in fixed positions in automobile assembly plants, etc., so even in vertical injection molding machines, they are used near the movable plate to which multiple molds are attached. I used it by fixing it on the machine stand.

Attached to the mounting shaft 52 of the robot shown in FIG. 4 used in the vertical injection molding machine are suction and extraction means for suctioning and taking out the molded product, and a chuck for gripping and inserting inserts and the like.

By using such an articulated robot, the molded product can be removed from a specific mold on the movable plate using the suction and extraction means attached to the mounting shaft 52 of the articulated robot. Furthermore, it is possible to automate the insertion work of inserting the insert held by the chuck into a predetermined position in the mold.

However, even though it is an articulated robot, there are blind spots, which limits the robot's working area. For this reason, it was not possible to perform operations such as ejecting molded products from the mold that was outside the working area, and it was found that the automation of the vertical injection molding machine was insufficient.

The inventors of the present invention thought that it would be effective to slide the entire articulated robot horizontally in order to eliminate the blind spot of the articulated robot as much as possible, and as a result of their research, they arrived at the present invention. .

That is, in the present invention, a plurality of molds are attached to a movable plate that is movable in a horizontal plane on a machine stand, and at least one of the molds is clamped and injection molded. In a vertical injection molding machine, in which operations such as removing and inserting a molded product into the other mold are performed, the machine is installed on the machine stand on the side of the other mold, and is installed horizontally without touching the movable plate. A mounting base that can freely slide in any direction; and a plurality of mounting bases that are attached to the mounting base and combined with each other so that operations such as taking out molded products and inserting them into the other mold can be automatically performed. There is provided a vertical injection molding machine characterized by comprising a multi-joint type robot having an arm in which each of the component parts is configured to be freely rotatable by a joint structure.

Furthermore, in the vertical injection molding machine having the above configuration, the movable plate is a turntable, which facilitates automation of the vertical injection molding machine.

(Function) According to the vertical injection molding machine of the present invention, a movable plate on which a plurality of molds are installed and an articulated robot with a wide working area are employed, and the entire robot can be moved horizontally. By providing it in a slidable manner, the blind spot of the multi-joint robot can be eliminated as much as possible, and the working area of the multi-joint robot can be significantly expanded.

Therefore, all the molds installed in the vertical injection molding machine are included in the robot's working area, making it possible to automate the work of taking out molded products.

(Example) The present invention will be explained in more detail using the drawings.

FIG. 1 is a partial plan view showing an embodiment of a vertical injection molding machine according to the present invention.

As shown in FIG. 2, the vertical injection molding machine shown in FIG. 18 are provided.
Of the two lower molds, the lower mold 16 is attached to the tie bar 14...
The mold is clamped with a mold, that is, an upper mold 20, provided on a movable plate that moves up and down along...

As shown in FIG. 1, the tip of the injection cylinder comes into contact with the clamped mold consisting of an upper mold 20 and a lower mold 16, and molten resin is injected into the cavity of the mold to perform injection molding.

While the lower mold 16 is being clamped and injection molded in this manner, operations such as removing the molded product and inserting inserts are performed on the lower mold 18.

Next, once the injection molding of the lower mold 16 is completed,
The movable plate is raised to open the lower mold 16 and the upper mold 20, and the turntable 12 is rotated so that the other lower mold 18, which is ready for injection molding, is clamped to the upper mold 20 and injection molded. .

In this embodiment, an articulated robot is mounted near the turntable 12 of such a vertical injection molding machine at a position on the machine base 10 that does not come into contact with the turntable 12.

The articulated robot used in this example has a fourth
This is the robot shown in Figures 5 to 5, and is commonly used in the assembly process of automobiles.

The details of this robot were explained earlier, so
It is omitted here.

The robot stand 50 is fixedly mounted on the robot mounting stand 22 shown in FIG.

Note that the robot mounting table 22 is a mounting table for mounting the robot on the machine stand 10.

This robot mounting table 22 has a tie bar 1 mounted on the front edge of the machine table 10 in the left and right direction toward the movable plate.
4 is fitted into a guide frame 26 provided parallel to the direction across the turntable 12, and the guide frame 2
6 along the longitudinal edges.

The guide frame 26 has a cross section as shown in FIG.
It has a trapezoid shape, with the upper base longer than the lower base and the outer sides vertical. For this reason, the robot mounting table 22
The robot support 24 mounted on the robot support 24 can be slid horizontally, but its movement in the vertical direction is restricted.

Horizontal sliding of the robot mounting table 22 is achieved by a feed screw 28 provided at the center of the guide frame 26 and parallel to the longitudinal edge of the guide frame 26, provided on the outer peripheral surface of the guide frame 26. This is done by being driven by a step motor 30.

By the way, when the articulated robot shown in FIGS. 4 and 5 is fixed at a predetermined position, the working area of the robot mounting shaft 52 to which a working tool such as a chuck is attached is the grid-shaped hatched area shown in FIG. Limited to area A.

On the other hand, the robot mounting table 2 shown in FIG.
By mounting the articulated robot shown in FIGS. 4 and 5 on 2, the working area of the robot can be expanded to the combined area of the hatched area A and the shaded area B of the grid pattern in FIG. .

According to the vertical injection molding machine of this embodiment, the working area of the articulated robot can be expanded, particularly in the left-right direction toward the movable plate.

Therefore, it is possible to select the right side or the left side of the machine stand 10 for the work of taking out the molded product, etc., as necessary, and the degree of freedom in the layout of the factory can be increased.

Furthermore, when loading and unloading the mold, the robot can be moved to a position where it does not get in the way.

Furthermore, the working area of the articulated robot of this embodiment can be expanded to the outside of the machine base 10, as shown in FIG. For this reason, the machine 10
An insert prepared outside the robot can be gripped by a chuck or the like mounted on the mounting shaft 52 of the robot and inserted into the mold.

Furthermore, the molded products taken out from the mold which has been opened after injection molding can be arranged and placed in a box or the like placed outside the machine stand 10.

In this way, in the vertical injection molding machine of this embodiment, the working area of the articulated robot can be expanded to the outside of the machine base 10. Seed inserts can be pre-placed at different positions within the working area.

For this reason, in conventional vertical injection molding machines,
The inserts to be inserted into the mold must be placed at specific positions, and a means of transportation is required to transport each insert from the place where the inserts are placed to the specific position. Although it is necessary, it can be made unnecessary in the vertical injection molding machine of this embodiment, and the peripheral equipment of the vertical injection molding machine can be simplified.

On the mounting shaft 52 of the robot employed in this embodiment, both a chuck for gripping and inserting the insert into the mold and a suction extraction tool for taking out the molded product may be attached.

In the embodiments described above, a case has been described in which the robot support 24 of the multi-jointed robot is fixed, but the robot support 24 may be provided rotatably.

By making the robot support 24 rotatable in this manner, the working area can be expanded to an even wider range.

(Effects of the invention) According to the invention, the blind spot of the articulated robot mounted on the machine base can be eliminated and the working area can be significantly expanded. Improved versatility,
Furthermore, the degree of freedom in factory layout can be increased by relaxing the direction of molded product removal work.

Further, it is possible to simplify the peripheral equipment of the vertical injection molding machine, such as the insert conveying device.

Furthermore, since the articulated robot can move horizontally, the articulated robot can be moved to a position where it will not interfere with mold replacement work, etc., and various tasks such as mold replacement can be performed easily. .

[Brief explanation of the drawing]

Fig. 1 is a partial plan view showing an embodiment of the vertical injection molding machine of the present invention, Fig. 2 is a perspective view of the vertical injection molding machine of Fig. 1, and Fig. 3 is a sliding frame and a robot. 4 is a side view of an articulated robot commonly used in automobile assembly factories, and FIG. 5 is a simplified front view of the articulated robot shown in FIG. 4. In the figure, 10... Machine base, 12... Moving plate (turntable), 14... Tie bar, 16,1
8...Lower mold, 20...Upper mold, 22...Mounting stand (robot mounting stand), 24...Robot support, 26...
...Guide frame, 28...Feed screw, 30, 56...
... Step motor, 40, 42 ... Servo motor, 44 ... Air cylinder, 46 ... First arm, 5
2...Mounting shaft, 54...Second arm, 58...Belt.

Claims (1)

[Claims for Utility Model Registration] 1. A plurality of molds are attached to a movable plate that is movable in a horizontal plane on a machine base, and at least one of the molds is used for mold clamping and injection molding. In a vertical injection molding machine, work such as ejecting and inserting a molded product into the other mold is performed while the injection molding is being performed. a mounting base that can freely slide in the horizontal direction without moving; and a mounting base that is attached to the mounting base and combined with each other so that operations such as taking out the molded product and inserting it into the other mold can be performed automatically. 1. A vertical injection molding machine comprising: a multi-jointed robot having an arm in which each of the plurality of component parts is configured to be rotatable by a joint structure. 2. The vertical injection molding machine according to claim 1, wherein the moving plate is a turntable.