JPS59192Y2 - Automatic unloading device for molded products in injection molding equipment - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an automatic molded product unloading device in an injection molded product device.

Conventionally, in order to obtain injection molded products, one injection machine was associated with one mold cavity fixedly installed in the mold clamping part.
The resin is injected from an injection machine into the clamped mold cavity, and after cooling and solidifying, the mold cavity is opened and taken out.

According to this, each piece of equipment operates one step at a time during the entire injection molding process, resulting in a low operating rate of the equipment, which was one of the causes of a decline in molding efficiency.

Therefore, in order to improve molding efficiency, multiple mold cavities are arranged at equal angles in a radial direction, and raw resin is sequentially injected into these mold cavities from a single injection machine. Various processes such as molding, molded product cooling, molded product removal, and mold clamping for mold cavity reuse are performed in order and at predetermined intervals for one mold cavity, and for all mold cavities. An injection molding apparatus has been proposed that can continuously perform the same process to continuously obtain molded products.

Figure 1 shows an example of this type of injection molding equipment.
1 is an injection machine, 2A to 2E are mold cavities arranged at equal intervals radially, and these mold cavities 2A to 2
E represents the resin passage branch valve 3 and the branch valve 3, respectively.
The injection machine 1 is connected to the injection machine 1 by extension nozzles 4A to 4E extending radially from the injection machine 1.

Each of the extension nozzles 4A to 4E has a shutoff valve (not shown).

) are installed, and these shaft off valves are connected to extension nozzles 4B, 4C, and those with extension nozzle 4A.
By sequentially controlling the opening and closing of the attached parts 4D and 4E, it is possible to complete molding from the mold cavity 2A, which is the molding starting point, to the subsequent mold cavities 2B, 2C, 2D, and 2E in sequence.

The molded products obtained in each mold cavity 2A to 2E are
Each mold cavity 2A is controlled by a traversal type molded product take-out device 5A to 5E attached to each mold cavity 2A to 2E, respectively.
-2E are transferred onto delivery belt conveyors 6A-6E, which are installed correspondingly to belt conveyors 6A-6E, respectively.

The delivery bells 1 to 6A to 6E are installed on the floor, and their delivery ends are connected to the main conveyor 7.

However, in an injection molding apparatus in which one molded product delivery belt conveyor 6A to 6E is arranged for each of the mold cavities 2A to 2E arranged at equal angular intervals in a radial manner as described above, each of the mold cavities 2A to 2E is Main conveyor 7 from 2E
Since the conveyance distance of the molded products is different for each of the belt conveyors 6A to 6E, the intervals between the molded products on the main conveyor 7 are not constant, and there is a high possibility that the molded products will collide with each other depending on the situation.

In order to prevent this, theoretically each belt conveyor 6
It would be possible to perform speed control of A to 6E, but this is difficult in practice.

Furthermore, arranging the belt conveyors 6A to 6E on the floor as shown in Figure 1 not only blocks the installation space for auxiliary equipment such as operation panels, control boards, hydraulic units, piping, and wiring; The present invention, which is undesirable due to its drawbacks such as extremely poor performance and operability, was developed in view of these points. Provided is an automatic molded product unloading device that prevents interference between molded products during conveyance and improves workability and operability in an injection molding device configured to complete molding one by one. It is something to do.

Embodiments of the present invention will be described below with reference to FIGS. 2 to 5.

Reference numeral 10 denotes an injection machine, into which raw resin is charged from a hopper 11, heated, plasticized, and sent to the front, and the plastic resin is injected from an adapter 12 at the tip.

The adapter 12 communicates with a resin passage branch valve 13, and extension nozzles 14A to 14E arranged at equal angular intervals are communicated with the branch valve 13.

Mold cavities 15A to 15E are connected to these extension nozzles 14A to 14E, respectively.

In addition, there are first shutoff valves 16A to 16E in the vicinity of the connecting parts with the branch valves 13A to 13E in these extension nozzles 14A to 14E, and second shutoff valves in the vicinity of the connecting parts with the mold cavities 15A to 15E. Valves 17A to 17E are interposed, respectively.

One of the second shutoff valves 17A to 17E
7A.

17B, 17D, and 17E do not appear in the figure.

An injection molding method using such a configuration will be explained.

First, only the first shutoff valve 16A and the second shutoff valve 17A of the extension nozzle 14A communicating with the mold cavity 15A at the starting point of molding are opened, and the branch valve 1
The plasticized resin is injected from the injection machine 10 into the mold cavity 15A at a constant pressure through the branch resin passage No. 3.

While this injection process is completed, the first shirt 1 to the off valve 16A are closed to block the inflow of resin from the branched resin passage to the extension nozzle 14A.

Next, the second shutoff valve 17A is closed to maintain pressure.

When the first shutoff valve 16A is closed in this manner, plasticization of the resin is progressing in the injection machine 10 in preparation for the subsequent injection into the mold cavity 15B.

After the first shaft off valve 16A is closed,
Extension nozzle 14B communicating with subsequent mold cavity 15B
The first shaft off valve 16B and the second shaft off valve 17B of the mold cavity 1 are opened.
Perform injection to 5B.

After injection, the first shaft off valve 16B is closed, and then the second shirt 1 to off valve 17B are closed.

Thereafter, it is further injected and molded into the subsequent mold cavity 15C in the same manner as described above.

Repeat the loosening operation one after another until all mold cavities 15A~
Perform injection and molding at 15E.

After the molding is completed, the mold cavities 15A to 15E are opened and the molded products are taken out one by one.

The molding in the mold cavity 15A, which is the molding starting point, is completed before the injection into all the mold cavities 15A to 15E is completed.

In this way, the molding starts at the mold cavity 15A, which is the molding starting point.
It can be performed sequentially and continuously, eliminating wasted time.
It is possible to significantly improve the operating rate.

On the other hand, 18 is a ring-shaped endless conveyor, and this endless conveyor 18 is installed in a space surrounded by each mold cavity 15A to 15E so as not to block the installation space for related equipment.

That is, as is clear from FIG. 3, it is arranged at a position higher than the floor surface 19.

Further, at the end adjacent to the endless conveyor 18 in each of the mold cavities 15A to 15E, a rotating molded product transfer device 2 is provided.
0A to 20E are provided, and these transfer devices 20A to 20E are provided.
20E allows molded products to be transferred from each of the mold cavities 15A to 15E to a predetermined position on the running path of the endless conveyor 1B.

Moreover, the switching operation is configured to sequentially shift from the one on the rear side in the running direction of the conveyor 1B to the one on the front side in the running direction at regular intervals.

Such a configuration can be easily obtained by adjusting the timing between the completion of molding in each mold cavity 15A to 15E and the operation of each molded product transfer device 20A to 20E.

It is preferable that these molded product transfer devices 20A to 20E be of a rotating pneumatic type as shown in the figure.

The endless conveyor 18 is made of a steel plate or an aluminum plate with a rubber coating applied to the surface to prevent damage to the molded products, and a concentric internal gear 21 is provided on the back side of the endless conveyor 18. is interlocked with a pinion 24 which is interlocked with a motor 23 with a speed reducer attached to the conveyor frame 22, thereby interlocking with the motor 23.

The traveling speed of the endless conveyor 1B will be described later.

In FIG. 4, 25 is a rotation support roller of the endless conveyor 18, and 26 is a side wall of the conveyor frame.

27 is a single molded product delivery conveyor connected to the endless conveyor 18.

That is, this molded product delivery conveyor 27 has a part of the conveyor frame 26 of the endless conveyor 18 cut out on the front side of the mold cavity 15A, which is the starting point of the molded product, and the delivery start end thereof is connected to the endless conveyor 18 at this cutout. It is coming.

2B is an endless delivery belt for sequentially delivering the molded products sent on the endless belt 1B to the delivery conveyor 27, as shown in FIGS.
8 and the unloading conveyor 27 on the lower side of the connected partial chamber,
It is installed so as to cross the running route of the endless conveyor 18,
And it is driven by a motor 29 with a reduction gear.

With this configuration, molded products are transferred to each molded product transfer device 20A to 20.
E, the mold cavities 15A to 15E are sequentially transferred from the transfer position A on the rear side in the running direction of the endless conveyor 1B to the transfer positions Port, C, 2, and E on the front side in the test run direction from each mold cavity 15A to 15E at regular intervals. .

Therefore, as in the example, five mold cavities 15A to 15
If the time to complete molding in all the mold cavities 15A to 15E is set to 60 seconds by E, that is, the molding cycle is set to 60 seconds, the transfer time of the molded product is 6015 = 12 seconds.

Therefore, in order to prevent the transferred molded product and the untransferred molded product being transferred from interfering with each other, the traveling speed of the endless conveyor 18 may be set to 60 degrees in 12 seconds.

The relative speed of the endless conveyor 18 to the molded product transfer pitch is not limited to the above-described one.

In short, it is sufficient to set the speed so that the transferred molded product and the untransferred molded product being transferred do not interfere with each other.

In this way, the molded products molded in each of the mold cavities 15A to 15E are transferred onto the endless conveyor 1B by the molded product transfer devices 20A to 20E, and then transferred from the endless conveyor 18 to the conveyor 2 by the delivery belt 2B.
7 continuously at regular intervals.

By the way, if the running speed of the endless conveyor 1B is determined as described above, it is impossible for the molded products to interfere with each other, but in order to take all possible measures to prevent interference, in this embodiment, each of the transfer positions 110 For the purpose of detecting that other molded products are not flowing through 550, 550, 550, 550, and 550, photoelectric switches 30A to 30E are provided on the side of the conveyor frame corresponding to these positions. .

If the presence of a molded product is detected by these photoelectric switches 30A to 30E, the molded product transfer devices 20A to 20E
The transfer operation can be made to wait for a while.

As described above, according to the present invention, by simply setting the running speed of the endless conveyor 18 as appropriate, the endless conveyor 18 can
The molded products on 8 and the molded products being transferred can be prevented from interfering with each other, and the molded products that have been molded one after another can be smoothly transported to a predetermined location via the endless conveyor 18 and the molded product delivery conveyor 27. The only thing that can be done is to have it removed.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a conventional unloading device, Figs. 2 to 5 show an embodiment of the present invention, Fig. 2 is a plan view, Fig. 3 is a view taken along the FIG. 4 is a vertical cross-sectional view of a main part of the endless conveyor 1B, and FIG. 5 is a side view of the entire delivery belt 2B. 10...Injection machine, 15A-15E...
Mold cavity, 18...Endless conveyor, 19.
... Floor surface, 20A to 2DE ... Molded product transfer device, 27 ... Molded product delivery conveyor, 28.
...Dispensing belt, I990, Honey, Ho...
...Transfer position.

Claims (1)

[Scope of utility model registration request] One injection machine 10 and a plurality of mold cavities 15A, 15E are arranged radially around the resin passage branch valve 13.
are arranged, the tip of the injection machine 10 is communicated with the branch valve 13 via the adapter 12, and each mold cavity 15 is
A to 15E communicate with the branch valve 13 via extension nozzles 14A to 14E, and each of the extension nozzles 14A, 1
4E first and second shutoff valves 16A to 16E
, 17A to 17E are installed, and the branch valve 13 and the injection machine 1
A ring-shaped endless conveyor 18 is disposed between the mold cavities 15A to 15E, and a molded product delivery conveyor 27 is provided, one end of which faces a proper position of the endless conveyor 1B, and the other end of which extends to a predetermined position. 15A-15
Molded product transfer devices 20A to 20E are provided to transfer the molded products molded by E onto the endless conveyor 1B, and an endless delivery belt 28 is provided to deliver the molded products on the endless conveyor 1B onto the molded product delivery conveyor 27. An automatic molded product delivery device for an injection molding apparatus, characterized in that a drive machine 29 is provided for rotating the delivery belt 28 in one direction.