JP2003170434A - Molded article discharge apparatus and molded article discharge method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a simple, inexpensive and efficient high cycle molded article discharge apparatus, and a molded article discharge method using the same. <P>SOLUTION: The molded article discharge apparatus having the taking-out, lining up and stocking functions of a molded article is constituted of the taking-out hand fitted to a molded article taking-out device having a suction nozzle and provided with a discharge function, the molded article lining-up and stocking device arranged outside a molding machine, and the molded article distributor arranged between the taking-out hand and the molded article lining-up and stocking device. In the molded article discharge method having a series of the taking-out, lining up and stocking functions of the molded article, the taking-out hand is moved to the taking-out position in a mold simultaneously with the mold opening of the molding machine, the suction nozzle mounted on the taking-out hand is evacuated at the time of ejection of the molded article to suck the molded article to move the same to the position of the molded article distributor provided outside the mold, and the molded article distributor presses and discharges the molded article to the wating distribution pole of the distributor not only to automatically distribute the molded article in one row but also to successively stock the same by a lining-up stock. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is effective for all plastic molded articles in injection molding or the like in which the shape is approximately cylindrical or hollow. Realignment, and the stock device can be stored in layers and aligned for each cavity.
And a molded product discharging device having a stock function, and a molded product discharging method.

[0002]

2. Description of the Related Art Of the methods for taking out molded products in plastic injection molding, the simplest method is a method of ejecting and dropping a mold, which is often used especially for small parts molded products. As shown in FIG. 10, the fixed product 1 includes a bottom mold 1a as shown in FIG.
The movable die 1b and the movable die 1c are provided to facilitate movement of the movable die 1c when the die is demolded, and the movable die 3 is provided with the molding cavity 2 on the surface facing the movable die 1c. It is placed on the 1c side. The movable mold 3 is provided with a push-out device 6 to which a push-out rod 5 for pushing the molded product 4 in the cavity 2 from the cavity 2 is attached. Below the surface of the movable mold 3 on the side where the cavity 2 is located at the position where the movable mold 3 has moved and opened, a molded product receiving box 7 for receiving the molded product 4 that has been ejected is provided, and the movable device 3 is movable by the ejecting device 6. The molded product 4 extruded from 3 falls and falls into the molded product receiving box 7.

[0003]

The above-mentioned ejecting and dropping method of molded products is often used for small molded products and multi-cavity molds among molded products, but has the following problems. 1) The molded product is stored or transported by a molded product receiving box set under the mold, or a transporting conveyor, and when these are dropped, due to the impact of the drop or contact between the molded products, A dent or the like is generated on the molded product, which results in a defective product. In addition, since this is a contact between the resins, it causes static electricity and causes dust and the like to adhere to the molded product.

2) Since many molded products fall at the same time, it becomes difficult to distinguish which molded product belongs to which cavity. It is possible to engrave the cavity number on the molded product, but in this case sorting work is required, and there are many problems in pursuing the cause in quality control such as the size, appearance, and accuracy of the molded product for each cavity. Is as described above.

Therefore, as a solution to the above-mentioned problem, recently, there is a method of utilizing a laterally traveling type automatic molding device, a multi-direction robot, or the like. It is similar to this method in that it uses a take-out hand, but with this method,
Depending on the ejection process of the molded product of the mold, take timing, grab the molded product, transfer it to the outside of the mold, and arrange it in a container etc. using the multi-axis control function, etc. , And install them separately, and give the molded product stocking device an array function.

Although this solves the problems described in 1) and 2) above for the time being, it is a simple, inexpensive, efficient, and high-cycle molded product discharging method in the molded product ejecting and dropping method. The advantage of (1) is that a complicated and expensive robot is used to take out individual molded products, and the productivity is lowered, which causes a new problem. Therefore, there has been a demand for development of a molded product discharging device and a molded product discharging method for solving the above-mentioned problems and taking out, aligning, and stocking molded products in a series of operations.

[0007]

As a result of earnest research, the present inventor has solved the above-mentioned problems by using a take-out hand having a suction nozzle and also having a discharging function to perform a series of molded product discharging operations. It was found that the present invention has led to the present invention.
That is, the molded product discharging apparatus of the present invention includes a take-out hand attached to a molded product taking-out apparatus, having a suction nozzle and having a discharging function, and aligning and stocking the molded articles arranged outside the molding machine. A device and the take-out hand,
It is composed of a molded product distributor installed between the aligned and stocked devices of the molded products, and is characterized by having a function of taking out, aligning and stocking a series of molded products.

Further, in the molded product discharging method of the present invention, at the same time when the mold of the molding machine is opened, the take-out hand moves to the take-out position in the mold, and the suction nozzle mounted on the take-out hand is
When ejecting a molded product, vacuum is drawn to adsorb the molded product,
Moved to the position of the molded product distributing device outside the mold, the molded product distributing device discharges the molded product under pressure to the distribution pole of the waiting distribution device, and automatically distributes the molded products in a single row to form an aligned stock. It is used for sequentially stocking in a rod, and is characterized by having a function of taking out, arranging and stocking a series of molded products.

The present invention provides, as means for solving the above problems, 1. A molded product takeout mechanism. Here, a) the transfer mechanism used is composed of a servo actuator or the like, and b) a molded product pick-up hand is equipped with a molded product suction nozzle also having a discharging function. 2. A mechanism that distributes molded products to a stock device. 3. Molded product alignment, stock section. It consists of a series of three points.

Each mechanism constituting the present invention will be sequentially described below. 1. A cylinder for taking out a molded product removing mechanism, a molded product suction nozzle (with a discharging mechanism), and a servo mechanism for driving the hand. This cylinder has a multi-point stop function such as a molded product take-out position, a molded product discharge position, and a standby position. The molded product suction nozzle is a prerequisite for the constituent factors of the present invention.
They may be connected to a compressed air circuit and may be vacuum-adsorbed when taking out a molded product and pressurized when ejecting a molded product. This means that no mechanical stress is applied during adsorption and ejection of the molded product,
There is no deformation of the molded product and the speeding up of these processes is realized.

2. Mechanism for Distributing Molded Articles to Stock Device This is a basic part of the present invention, and is composed of distribution poles corresponding to the number of molded articles taken and upper and lower clamps for holding the poles. The clamps open and close alternately in the upper and lower stages. 1) When the molded product is received by the distribution pole, the upper clamp is open and the lower clamp is closed. And then stop, 2) then the upper clamp is closed, the lower clamp is opened, the molded product falls on the alignment stock bar installed in the alignment stock device, 3) then the lower clamp is closed. , Then the upper clamp opens and waits for the next shot.

3. Molded product alignment, stock part A plate constituted by a portable weight in which an arbitrary number of aligned stock rods having a mechanism for aligning molded products in layers are arranged in parallel according to the stock amount, and The plate is composed of an apparatus having a pitch feed mechanism such as a conveyor set with an arbitrary number of plates. First, the aligned stock pole is made to stand by at a position where the molded products cut out in one row by the distributing mechanism of the above 2) fall, and the stacked stock poles are sequentially stacked and stacked. If 4 molded parts are received, 4 poles will be used, and if 6 molded parts are used, 6 poles will be used. When the pole is full, it moves to the next zone and stocks it in sequence.

[0013]

In the present invention, at the same time when the mold of the molding machine is opened,
The take-out hand moves to the take-out position in the mold, and when the molded product is ejected, the suction nozzle attached to the take-out hand is evacuated to suck the molded product, and it moves to the position of the molded product distribution device outside the mold and stands by. When it is discharged under pressure to the distribution pole of the distribution device, it is automatically distributed in one line and stocked in the aligned stock rod. This does not depend on the placement of the molded parts in the mold cavity,
Since it is possible to arrange the layers in layers, and the molded products can be stacked in layers on a stock rod for each cavity of the mold and stocked in layers, the stock amount per unit area can be dramatically increased.

With the structure of the present invention, at the moment when the molded product is ejected, it is simply vacuum-sucked and mounted on the suction nozzle, transferred to the outside of the mold, and sent to the molded product distribution device regardless of the cavity arrangement of the mold. The stock device can be aligned and stocked in a line, and an extremely fast and efficient take-out, aligning and stocking device has been realized. In addition, the stock amount per unit area has been increased three times or more compared to the case where the mold cavity arrangement is kept as it is, and the problems described above have been solved.

The synthetic resin to which the present invention can be applied is not limited and can be widely applied to ordinary injection molding methods. In particular,
Polyolefin, aromatic vinyl compound polymer, vinyl ester polymer, polyvinyl halide, unsaturated acid or its derivative polymer, polyether, polycarbonate, polyamide, polyesteramide, polythioether,
Examples include various synthetic resins for molding such as silicone resin, liquid crystal resin, various synthetic rubbers, various graft polymers, and various block polymers. An injection molding method is applied as the molding method. The shape of the molded product is preferably cylindrical or hollow.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to FIGS. In this embodiment, the structure of an apparatus for taking out, aligning, and stocking a molded product of a mold having four cavities is shown in FIG.
3, Figures 4 and 5 showing detailed views of each part of the device for taking out, aligning, and stocking molded products, and Figures 6 to 8 showing stock plates
Will be described.

FIG. 1 is a plan view of an injection molding machine and a molded product discharging device, FIG. 2 is a front view thereof, and FIG. 3 is a side view thereof. In general,
The molded product discharging device consists of a gantry integrated on the non-operation side of the injection molding machine, and is mounted on the injection molding machine. The servo actuator is installed along with the center position of the pick-up hand at the forward limit.

FIG. 4 is a front view of the molded product take-out portion of the molded product discharging device, and FIG. 5 is a side view of the same. 4 and 5, the nozzle hand 12 equipped with the suction nozzle 13 is driven by the servo actuator 11, and its stop position is approximately 1).
It is provided with a multi-point stop mechanism such as a standby position, 2) a molded product taking-out position in the mold, 3) a spool discharging position, and 4) a distributing position.

First, 1) the mold is opened from the standby position, and at the same time 2) it is moved to the take-out position in the mold, and the suction nozzle is evacuated in accordance with the ejecting operation of the molded product, and the molded product is ejected. After attaching to the suction nozzle, if necessary, 3) shifting to the spool discharge position outside the mold to discharge only the spool, and 4) at the distribution position, toward the four distribution poles 14 set at each nozzle position. It has a mechanism that pneumatically feeds the molded product from the suction nozzle and fits it into each sorting pole.

The mechanism for distributing the molded products to the stock device is
The distribution pole 14 (four in this case), an upper pole holding switch 15, a lower pole holding switch 16, and a pole holding switch transfer device 17. In this operation, first, the distribution pole 14 is held with the lower pole holding switch 16 closed and the upper pole holding switch 15 is held.
Hold it open. Next, the molded product sent from the suction nozzle is guided by the distribution pole 14,
It falls by its own weight and temporarily stops on the upper surface of the lower pole holding switch 16. Next, the upper pole holding switch 15 is closed to hold the sorting pole, and then the lower pole holding switch 16 is opened to drop the molded product.

In the alignment section of the molded products, in the stock section, a stock plate 18 (detailed view in FIGS. 6 to 8), a stock rod 19 attached to the stock plate 18, and a conveyor 2 for pitch-feeding them.
No. 0, and the stock plate has embedded positioning guide pins for fitting and setting the stock rod (24 in FIG. 7). In this case, there are 8 rows and 5 rows, and 1 plate. Forty stock rods can be set (23 in Fig. 6). At this time, it is important that the pitches are laid out so close to each other that the outer shapes of the molded products do not come into contact with each other.

The plates are sequentially arranged in parallel in the conveyor non-conveying direction with the molded product dropping point 21 of the distribution pole of the distributor on the conveyor as a base point. First, at the discharge position A point 22 of the distributor, the molded product is on the A side of the first row, 4
When dropping into the stock bar of a book, the upper end of the stock bar, or an arbitrary number of counts is stocked, the discharge position of the distributor is moved to B point, this time the B side of the first row, 4 Continue dropping into the stock bar, and when a certain amount is stocked as described above, the stock in the first row is completed, and this time the conveyor feeds one pitch, and the stock in the second row stock bar is I will continue.

FIG. 9 shows the structure of the suction nozzle. The suction nozzle attached to the pick-up hand is: 1) The outer diameter of the suction nozzle should be as small as possible with respect to the inner diameter of the molded product. 2) The tip of the suction nozzle should be tapered inward from the inside 3) Molding Since the product is adsorbed and discharged by air, it has a structure and functions such as processing air holes according to the molded product.

As a result, in the above 1), the work of aligning the mold cavity position with the suction nozzle is simplified, and the molded product is prevented from being damaged or deformed by the ejector pin of the mold when the molded product is delivered. In 2), a fall prevention function is provided when the molded product is conveyed.
In 3), since the air holes have both functions of adsorbing and discharging, the weight of the hand is reduced and the basic function of enabling high-speed operation of the entire apparatus is achieved.

[0025]

By adopting the above configuration, the molded product discharging apparatus and molded product discharging method of the present invention have a function of taking out, aligning, and stocking molded products in a series of operations. As a result, 1) Adoption of a special suction nozzle prevents deformation and scratches on the molded product. 2) By adopting an extremely simple mechanism of the molded product distributor,
Since the molded products taken out in the mold cavity arrangement can be rearranged and stored, the stock amount per unit area can be increased at least three times. 3) Lot management for each cavity of molded products is possible. 4) Alignment facilitates visual inspection of molded products. 5) Elimination of dust adhesion after molding. 6) In the subsequent process, automatic distribution can be achieved by linking with an automatic boxing machine. 7) The automatic supply of molded products to the automatic assembly machine can be achieved. It has advantages such as Finally, it is a system that makes a great contribution in terms of space saving of stock equipment, completely unmanned operation of molding, improvement of quality control of molded products, and efficiency of production management.

[Brief description of drawings]

FIG. 1 is a plan view of an injection molding machine and a molded product discharging device according to an embodiment of the present invention.

FIG. 2 is a front view of the molded product discharging device according to the embodiment of the present invention.

FIG. 3 is a side view of an injection molding machine and a molded product discharging device according to an embodiment of the present invention.

FIG. 4 is a front view of a molded product take-out portion of the molded product discharging device according to the embodiment of the present invention.

FIG. 5 is a side view of a molded product taking-out portion of the molded product discharging device according to the embodiment of the present invention.

FIG. 6 is a plan view of a stock plate of the molded product discharging device according to the embodiment of the present invention.

FIG. 7 is a front view of a stock plate of the molded product discharging device according to the embodiment of the present invention.

FIG. 8 is a side view of the stock plate of the molded product discharging apparatus according to the embodiment of the present invention.

FIG. 9 shows a structure of a suction nozzle of a molded product discharging apparatus according to an embodiment of the present invention.

FIG. 10 shows the removal of a conventional molded product.

[Explanation of Codes] 11: Servo Actuator, 12: Nozzle Hand, 1
3: suction nozzle, 14: sorting pole, 15: switch for holding upper pole, 16: switch for holding lower pole, 1
7: Pole holding switch transfer device, 18: Stock plate, 19: Stock rod, 20: Conveyor, 21: Molded product drop point, 22: Discharge position A point, 23: Stock plate, 24: Positioning guide pin

Claims (2)

[Claims] 1. A take-out hand attached to a take-out device for molded articles, which has a suction nozzle and also has a discharge function, a device for aligning and stocking molded articles arranged outside the molding machine, and the take-out hand. And a molded product distributor installed between the aligned and stocked devices of the molded products. 2. At the same time when the molding machine is opened, the take-out hand moves to a take-out position in the mold, and a suction nozzle attached to the take-out hand sucks the molded article by vacuuming when the molded article is ejected. And move it to the position of the molded product distributing device outside the mold, and the molded product distributing device discharges the molded product under pressure to the distribution pole of the waiting distribution device, and automatically distributes and aligns in one row. A method for discharging molded products, which is characterized by sequentially stocking stock bars.