JPH10286847A - Rotary table type vertical injection molding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary table type vertical injection molding machine for shortening the molding cycle and carrying out the releasing work for a molded product by using a single product releasing robot. SOLUTION: Product releasing stages B1 and B2 are provided on respective positions of rotation from an injection molding stage A into the clockwise direction and the counterclockwise direction by 90 deg., and a product releasing robot 6 is disposed in the inverted state on a central position of the product releasing stages B1 and B2 through a stay 8 fixed on a base 2 of an injection molding machine in a manner of not interfering with a rotary table 3. As the rotary table 3 required for the injection molding work and the product releasing work can be set in small size, the molding cycle can be set at high speed. Also as the product releasing from the product releasing stages B1 and B2 can be carried out by a single robot 6, it is not required to provide a plurality of robots to save the equipment investment.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an improvement of a rotary table type vertical injection molding machine.

[0002]

2. Description of the Related Art A rotary table type vertical type in which two lower dies are mounted on a rotary table and an injection molding operation is performed while rotating the rotary table between an injection molding stage and a product take-out stage. Mold injection molding machines are known. FIG. 3 schematically shows the configuration of a conventional rotary table type vertical injection molding machine 1. FIG. 3A is a plan view of the rotary table type vertical injection molding machine 1, and FIG.
Is a front view, and FIG. 3C is a right side view, and the injection mechanism is not described.

The main part of the rotary table type vertical injection molding machine 1 includes a base 2 forming a main body, a rotary table 3 for mounting lower dies a and b, a platen 5 for mounting an upper die c, and a platen 5. And a robot 6 for taking out a product. An injection mechanism (not shown) is provided upright on the platen 5. Note that a lower mold fixed upper mold movable type mold clamping mechanism in which the platen 5 is moved up and down while the rotary table 3 is fixed to perform the mold clamping mold opening operation is used, and the rotary operation is performed while the platen 5 is fixed. There is a case where a lower mold movable upper mold fixed type mold clamping mechanism in which the table 3 itself is moved up and down to perform the mold clamping mold opening operation is employed.

A rotary table 3 formed in a disk shape is rotatably mounted on a base 5 around one of tie bars 4 supporting a platen 5, and is rotated at a pitch of 180 ° using a servomotor or the like as a drive source. It is designed to be driven to rotate in the direction.

[0005] Referring to the base 2, the position A shown in FIG. 3 is an injection molding stage, and the position B is a stage for taking out a product.
Each of the lower dies a and b of the same shape attached at a pitch of 0 ° alternates between a stage A for injection molding and a stage B for product removal by the rotation of the rotary table 3 by 180 °. To reciprocate.

In other words, the mold is clamped in the state shown in FIG. 3 and the resin is filled between the lower mold a and the upper mold c in the injection molding stage A to perform an injection molding operation. Is performed, the rotary table 3 is rotated by 180 °, a molded product is taken out by the robot 6 from the lower die a moved to the stage B for taking out the product, and at the same time, the lower die b moved to the stage A for injection molding. The injection molding operation is performed. In a continuous injection molding operation, this operation is repeated.

FIG. 3A shows a demand for saving the space required for installing an injection molding machine as much as possible.
In general, the projected area of the base 2 is configured to be the minimum size in accordance with the size of the rotary table 3, and the space for installing the robot 6 is necessarily located at the four corners of the base 2. Limited. Further, since the operation area of the robot 6 is limited as shown by a two-dot chain line in FIG. 3, it is necessary to take out the molded product from the lower mold moved to the stage B for taking out the product, and the robot 6 can be installed. The position is finally limited to two corners on the stage B side for taking out the product.

As shown in FIG. 3 (a), there is a considerable overlap between the operation area of the robot 6 and the rotary table 3. Therefore, even if the rotary table 3 is not necessarily rotated by 180.degree. It is possible to take out the molded product.

For example, in the example shown in FIG. 3A, it is possible to take out the molded product from the lower mold a by simply rotating the rotary table 3 counterclockwise by about 90 ° from the state shown in the figure. In this state, it is necessary to perform an injection molding operation using the other lower mold b.
It is necessary to mount the rotary table 3 at a position rotated clockwise by about 90 ° from the position of the lower mold a in FIG.

According to such a configuration, the first injection molding operation for the lower die a and the removal operation of the molded product, and the first injection molding operation for the lower die b can be performed. In order to perform the next injection molding operation according to a, the rotary table 3 needs to be rotated clockwise by about 90 °. At this time, the lower mold b from which the molded article is to be removed is moved clockwise from the position of the lower mold a in FIG. 3A by using the center of the rotary table 3 as a lever point.
Since it is at a position rotated by about 0 °, it completely deviates from the operation area of the robot 6 as shown in FIG.

Therefore, in order to take out the molded product from the lower mold b in this state, the other one of the two corners on the stage B side for taking out the product, that is, 6 shown in FIG. It is necessary to arrange the robot 6 also in the position '.

As described above, in the prior art,
As shown in FIG.
The robot is rotated by 0 °, the lower die is moved to the stage B for taking out a product, and a single robot 6 takes out a molded product, or the rotation amount of the rotary table 3 is set to 18
Although it is less than 0 ° (for example, about 90 °), there is no other way than to take out the molded product by dispersing the product take-out stage in two places, but in the former configuration, the rotary table 3 is an injection molding stage. The time required to reciprocate between A and the stage B for taking out the product increases, and the molding cycle cannot be shortened. In the latter configuration, two robots 6 are required, so that equipment is required. It has the disadvantage of increased investment.

[0013]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a rotary table type vertical injection molding machine capable of shortening a molding cycle and removing a molded product by a single product removal robot. To provide.

[0014]

According to the present invention, a stage for taking out a product is provided at each of positions rotated by a predetermined amount in a clockwise direction and a counterclockwise direction from the stage for injection molding, and the injection is performed so as not to interfere with the rotary table. The object has been achieved by a configuration in which a robot for taking out a product is disposed by being turned over near a center position connecting the two stages for taking out a product via a stay fixed to a base of a molding machine. .

A rotary table is constituted by a substantially fan-shaped plate having a rotation center at an apex, and a stage for taking out a product is provided at each position rotated by a predetermined amount clockwise and counterclockwise from the stage for injection molding. A similar problem has been achieved by a configuration characterized in that a robot for taking out a product is provided upright near a central position connecting the two product taking-out stages.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a view showing a main part of a configuration of a rotary table type vertical injection molding machine 7 according to an embodiment to which the present invention is applied. FIG. 1A is a plan view and FIG. 1 (b) is a front view, and FIG. 1 (c) is a right side view.

The description of the injection mechanism is omitted,
The configuration of the base 2, rotary table 3, platen 5, and tie bar 4 is the same as that of the conventional example of FIG. However,
The clockwise rotation limit of the rotary table 3 is shown in FIG.
1 and the rotation limit in the counterclockwise direction is shown in FIG.
It is at a position rotated 90 ° counterclockwise from the state of FIG.

That is, with respect to the base 2, the position A shown in FIG. 1 is the stage for injection molding, and B1 and B2
Is a stage for taking out a product, and the lower dies a and b of the same shape mounted on the rotary table 3 at a pitch of 90 ° correspond to the counterclockwise or clockwise direction of the rotary table 3 described above. Due to the rotation, the stage on the stage B2 for taking out the product and the stage A on the injection molding
Or on the stage A for injection molding and the stage B1 for taking out the product.

In short, when the lower mold b is positioned on the stage A for injection molding, the molded product is taken out from the lower mold a on the stage B2 for taking out the product. When it is located on the stage A, it means that the molded product is taken out from the lower mold b on the stage B1 for taking out the product.

A continuous injection molding operation and a molded product take-out operation are performed only by rotating the rotary table 3 in the forward and reverse directions within a 90 ° angle range between the clockwise rotation limit and the counterclockwise rotation limit. As a result, the molding cycle can be significantly shortened as compared with the conventional example shown in FIG. 3 in which the rotary table 3 is rotated by 180 ° to perform the injection molding operation and the removal operation of the molded product. .

The product take-out robot 6 is suspended over the center of the lower surface of a stay 8 fixed in an arch shape above the rotary table 3 so as to straddle both sides of the base 2. Stages B1 and B2 for taking out products
The molded product can be taken out of the lower mold located at any of the above positions, and does not interfere with the rotary table 3. The operation area of the robot 6 is shown by a two-dot chain line in FIG.

Therefore, even if there are two product take-out stages, only one robot 6 is required, and the capital investment is reduced. Of course, in the insert molding die, in addition to the operation of removing the molded product, the operation of setting the insert part in the lower die can be performed by the robot 6.

As described above, the embodiment has been described in which the product take-out stages B1 and B2 are provided at positions rotated 90 ° clockwise and counterclockwise from the injection mold stage A, respectively. Stage B for
The minimum necessary rotational position for providing the first and the second B2 is the platen 5
And the size of the mold, etc.
The rotation angle of the robot 6 and the operation program of the robot 6 are adjusted accordingly. In the example of FIG. 1, the platen 5 having a substantially equilateral triangle shape is employed.
Stages B1 and B2 for taking out products can be provided at positions slightly rotated by 60 ° clockwise and counterclockwise from the stage A for injection molding.

FIG. 2A is a view showing a main part of the configuration of a rotary table type vertical injection molding machine 9 according to another embodiment to which the present invention is applied. Since the basic configuration of the rotary table type vertical injection molding machine is the same as that of the conventional example of FIG. 3 and the embodiment of FIG. 1, only the plan view of the rotary table type vertical injection molding machine 9 is shown in FIG. Is shown.

First, this embodiment is most different from the embodiment of FIG. 1 in the shape of the rotary table 10.
That is, while the rotary table 3 in FIGS. 3 and 1 is formed in a complete disk shape, the rotary table 10 of the present embodiment has a single rotation center as shown in FIG. Is formed in a substantially fan-shaped shape with the tie bar 4 as a vertex.

However, the rotary table 10 has a lower mold a,
Since it is necessary to securely support the bottom surface of b, each of the fan-shaped hypotenuses having a central angle at an angle (90 ° in the illustrated example) at which the product take-out stages B1 and B2 are provided with reference to the injection-molding stage A is The lower molds a and b are formed so as to be offset outward by half the width of the projected area, and are not in the strict sense of a fan shape, but have a substantially sector-shaped arc length as a reference. Longer than the central angle (90 °) corresponding to.

As in the case of the embodiment described with reference to FIG. 1, the minimum necessary rotation position at which the product take-out stages B1 and B2 are provided differs depending on the size of the platen 5 and the mold. The angle and the size of the central angle that determines its shape are determined by the stage B for taking out the product.
1 and B2 are determined according to the provided angle.

In this embodiment, the counterclockwise rotation limit of the rotary table 10 is the position shown in FIG. 2A, and the clockwise rotation limit is 90 degrees clockwise from the state of FIG. 2A. ° It is in the rotated position.

FIG. 1 shows that the rotary table 10 is rotated forward and reverse within a 90 ° angle range between a counterclockwise rotation limit and a clockwise rotation limit to perform a continuous forming operation and a product removing operation. The molding cycle is greatly reduced as compared with the conventional example as shown in FIG. 3 in which the rotary table 3 is rotated by 180 ° to perform the injection molding operation and the removal of the molded product. can do.

Further, in the present embodiment, the rotary table 10 is formed in a substantially fan shape, so that the inertial mass itself can be greatly reduced as compared with the disk-shaped rotary table 3. Is the same, it is possible to further speed up the molding cycle as compared with the embodiment shown in FIG.

Also, since the rotary table 10 is formed in a substantially fan shape, the upper surface of the base 2 is not completely covered by the rotary table 10 and the rotary table 10 is rotated to the counterclockwise rotation limit. Even if it is rotated up to the clockwise rotation limit, some empty space is created on the base 2 on the side opposite to the stage A for injection molding.

A robot 6 for taking out products is erected in this empty space, and two product take-out stages B1, B2
The stay 8 as shown in the embodiment of FIG. 1 is not required, which contributes to the overall downsizing and weight reduction of the injection molding machine.

The shape of the rotary table 10 is not necessarily a sector, but may be a polygon as shown in FIG. 2B.

In short, no interference occurs between the outer peripheral portion of the rotary table 10 and the other two tie bars 4 except for the tie bar 4 serving as the center of rotation (that is, the tie bar 4 has a smaller radius than the reference arc-shaped contour). The shape must not protrude outwards), and the lower dies a and b can be reliably supported. Therefore, as long as there is no problem in strength, it is possible to form a substantially L-shaped shape as shown by a broken line in FIG.

[0035]

According to the rotary table type vertical injection molding machine of the present invention, since the rotary table is rotated at a small angle of less than 180 °, continuous injection molding operation and product removal operation can be performed. The molding cycle can be greatly reduced compared to the conventional rotary table type vertical injection molding machine that rotates the table by 180 ° to perform injection molding and product removal.
In addition, since the removal of the molded product can be performed by a single product removal robot, the cost of equipment investment can be reduced.

Further, since the rotary table is constituted by a substantially fan-shaped plate, the inertial mass of the rotary table itself is greatly reduced, and the molding cycle is further accelerated.

[Brief description of the drawings]

FIG. 1 is a view showing a main part of a configuration of a rotary table type vertical injection molding machine according to an embodiment to which the present invention is applied.

FIG. 2 is a view showing a main part of a configuration of a rotary table type vertical injection molding machine according to another embodiment to which the present invention is applied.

FIG. 3 is a view schematically showing a configuration of a conventional rotary table type vertical injection molding machine.

[Description of Signs] 1 Rotary table type vertical injection molding machine 2 Base 3 Rotary table 4 Tie bar 5 Upper die mounting platen 6 Robot 7 Rotary table type vertical injection molding machine 8 Stay 9 Rotary table type vertical injection molding machine 10 Rotary table 10 'Rotary table A Injection molding stage B Product take-out stage B1 Product take-out stage B2 Product take-out stage a Lower die b Lower die c Upper die

Claims (2)

[Claims] 1. A rotary table type vertical type in which two lower dies are mounted on a rotary table and an injection molding operation is performed while rotating the rotary table between an injection molding stage and a product take-out stage. In a mold injection molding machine, a stage for taking out a product is provided at each position rotated by a predetermined amount clockwise and counterclockwise from the stage for injection molding, and fixed to a base of the injection molding machine so as not to interfere with the rotary table. A rotary table type vertical injection molding machine, characterized in that a robot for taking out a product is turned upside down near a central position connecting the two product taking-out stages via an installed stay. 2. A rotary table type vertical mounting two lower dies mounted on a rotary table and performing an injection molding operation while rotating the rotary table between an injection molding stage and a product take-out stage. In the mold injection molding machine, the rotary table is constituted by a substantially fan-shaped plate having a rotation center as a vertex, and a product for taking out a product at a position rotated a predetermined amount clockwise and counterclockwise from an injection molding stage. A rotary table type vertical injection molding machine characterized in that a stage is provided, and a robot for taking out a product is erected and provided near a central position connecting the two product taking out stages.