JP2003127189A - Molded product recovery system in injection molding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To recover molded products obtained from cavities of a mold with a plurality of cavities in such a distribution state as corresponding to the molding arrangement pattern of cavities of the mold. SOLUTION: The top of a mold clamping device having arranged cavities of a mold with a plurality of cavities is set as a recovery part 9 for the molded product by arranging a rotatable table 14. In addition, an unloading machine 20 for transferring the molded product to the recovery part 9 is arranged and used to unload the molded product after opening the mold. Further, the machine 20 drops the molded product onto the recovery part 9 is accordance with the molding arrangement pattern of the mold cavities for the molded product. The table 14 has a plurality of receiving parts 16 composed of attachable/detachable receiving boxes 19, arranged at a fixed interval in the rotating direction. The table 14 also rotates the receiving parts 16 in a split rotary fashion corresponding to molded product dropping positions, and receives the molded product dropped from the unloading machine 20 in such a distribution state as corresponding to the molding arrangement pattern of mold cavities for the molded product.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molded product recovery system in an injection molding machine after a small injection molded product has been taken out of a mold by a take-out machine.

[0002]

When collecting a molded product (product, runner, etc.) in a conventional injection molding machine by a take-out machine, the molded product is taken out of the molding machine and placed on a conveyor or a receiving box installed there. Transferred and collected. Therefore, after the molded product is taken out of the mold, it is conveyed to the operating side or the non-operating side of the molding machine, and to the rear of the mold clamping device. Since it takes time, it may not be suitable for high cycle molding. Further, a space for arranging various recovery devices is required around the molding machine, and when arranging a large number of molding machines, it is necessary to provide a working space and a recovery space between the molding machines. In view of this point, the present applicant has previously proposed a molded article recovery system. In this molded product recovery system, above the mold clamping device,
It is set up in the collection section of the molded product consisting of a conveyor, and the collecting means such as the receiving box and the transporter are arranged, and the unloader having the transfer means of the molded product to the collecting section is erected on the fixed platen. Then, the molded product is taken out after the mold is opened by the take-out machine, and the molded product is transferred to the recovery section for recovery or transport recovery. In addition, in this molded product collection system, an inspection device is installed in front of the conveyor to inspect the molded products and to sort out defective products. I also proposed to separate it from good products.

By the way, it has been attempted to implement the above-mentioned molded product recovery system when molding a small molded product by a plurality of mold cavities, but an inspection device corresponding to this system becomes expensive. This raises the problem of raising costs. On the other hand, in the case of molding by using a plurality of mold cavities, a defective molded product is often molded from a specific cavity portion, and molded products from other cavity portions are often molded as good products without problems. Therefore, the cost can be reduced by collecting the molded products for each molding portion of the mold cavity and separately inspecting only the molded products in the cavity portion where defects easily occur. Therefore, the present invention has been conceived in order to solve the above problems, and an object thereof is to provide a molded product molded from a plurality of mold cavities in a state corresponding to a cavity portion in the mold cavity. It is to provide a molded product recovery system that can be separately classified by.

[0004]

According to the present invention according to the above object, an upper part from a retracted position of a movable plate to an end of a mold clamping device having a plurality of mold cavities arranged therein is set as a part for collecting molded products. While arranging a rotatable table, a take-out machine having means for transferring the molded product to the collecting section is arranged, and the molded article is taken out after the mold is opened by the taking-out machine. The table is provided with a plurality of receiving parts made up of removable receiving boxes at fixed intervals in the rotational direction according to the molding arrangement of the molded products, and the receiving parts correspond to the dropping positions of the molded products. Receive the molded product dropped from the unloader in a divided state according to the molding arrangement of the molded product in the receiving part in the divided rotation, and move the molded product from the receiving part moved to a position other than the dropped position of the molded product by the divided rotation of the table. Collect It is the molded product recovery system in an injection molding machine according to claim.

In the present invention, each of the receiving parts comprises a plurality of receiving boxes corresponding to the number of molded products to be taken in the mold cavity, and the receiving boxes in the receiving parts are arranged in the molding arrangement of the molded products of the mold cavities. It may be arranged accordingly.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION 1 is a mold clamping device for an injection molding machine, in which a movable platen 6 is inserted through and supported by tie bars 5 at four corners extending from a fixed platen 3 and a support plate 4 which are installed on a machine base 2, and the movable platen is movable. A toggle mechanism 7 provided between the board 6 and the support board 4 opens and closes and clamps a mold 8 that is divided into a fixed board 3 and a movable board 6 and is attached. Then, in the fixed platen 3 and the movable platen 6, mold cavities for taking four pieces are attached.

A base plate 10 is provided above the toggle mechanism 7 as a part 9 for collecting the molded product, above the movable platen retracted position of the mold clamping device 1 to the end on the support platen side. This base plate 10 is installed side by side on columns 11 standing on both sides of the upper surface of the machine base 1 and on arms 12 mounted on both sides of the upper surface of the fixed platen 2 in parallel with the mold clamping device 1. It is mounted and fixed on the pair of left and right frames 13, 13.

A circular table 14 is provided on the upper surface of the base plate 10, and the table 14 is divided by a constant angle in one rotation direction about a support shaft 15 at the center of the lower surface by the operation of a driving means (not shown). To do. Further, the upper surface of the table 14 is provided with four receiving portions 16 at regular intervals in the rotation direction, and each of the receiving portions 16 has an upper surface of the table 14 as shown in FIGS. 2 and 3. A tray 18 with a handle that is detachably arranged on the guide 17 provided in the above, and four receiving boxes 19 that are detachably arranged inside the tray 18 in two rows in the vertical and horizontal directions. As described above, the table 14 is provided with the four receiving portions 16 on the upper surface, and the receiving portions 16 are positioned corresponding to the dropping positions of the molded articles by the unloader, which will be described later. Each time it is filled, the four receiving portions 16 are provided so as to be divided and rotated by 90 degrees so as to be sequentially moved to the dropping position.

Reference numeral 20 denotes a take-out machine which is erected on the upper surface of the stationary platen 3, and is provided with a main body 24 having a take-out arm 23 projecting laterally on a traverse 22 horizontally provided on a base 21. A holder 2 in which a take-out rod 27 having a take-out head 25 at its lower end is vertically movable on the side surface of the take-out arm 23.
It has a structure in which 6 is attached so that it can be reciprocally moved.
3 is located on the fixed platen 3 from the fixed platen 3 to the fixed platen 3 so that the molded product taken out after the mold is opened can be carried to the position for dropping the molded product set on the movement locus of the receiving part 16. It's stuck.

In this way, in the recovery system in which the unloader 20 is installed in the recovery section 9 by utilizing the space above the mold clamping device 1, the unloading rod 27 is lowered after the mold is opened and the unloading head 25 is moved to the mold. After inserting into the space and taking out the molded article, the take-out rod 27 is raised to pull up the take-out head 25 together with the molded article to the original upper position, and the holder 26 is moved to move the collecting section 9
The molded product is transferred to a position above the receiving portion 16 of the table 14 and the molded product is received by the receiving portion 16 by dropping the molded product at this position, and the receiving portion 16 receives the molded product until a predetermined number of moldings are performed. The table 14 is rotated 90 degrees after the molded product is dropped by a predetermined number of moldings, and the receiving portions 16 each having the empty receiving box 19 are newly moved to correspond to the dropping position. hand,
I am trying to receive the molded products that are continuously dropped. In the collection unit 9, the position facing the drop position A of the table 14 is set as the tray take-out position B, and the receiving unit 1 moved from the drop position A.
When the tray 6 is at the tray take-out position B, the tray 18
The receiving box 19 is removed and the empty receiving box 19 is placed in the tray 1.
It is replaced with the receiving portion 16 attached to the No. 8.

As described above, the mold cavity is for molding four molded articles, and the take-out head 2 is used.
In Fig. 5, the four molded products are taken out in a state corresponding to the four cavity portions of the mold cavity, that is, the arrangement of the molding positions of the molded products, and the receiving portion 16 is maintained while maintaining the state.
The arrangement of the receiving box 19 in the receiving portion 16 corresponds to the arrangement of the molding position, and the receiving box 19 is divided into molded products one by one.
I am trying to drop it in. As a result, only the molded product molded from the same cavity portion is supplied to each of the receiving boxes 19, and it is recovered in the receiving box 19 corresponding to the cavity portion in which the defective product is found in advance. The molded product can be inspected by a separately prepared inspection device, and a good product and a defective product can be distinguished without assembling the inspection device in the molding machine. In the figure, reference numeral 28 is a defective product receiving box arranged near the table 14, and is for collecting the molded product judged to be defective when the molded product is taken out by the take-out head 25.

Depending on the molding material, the above-mentioned molded product is easily charged with static electricity, and when the molded product is a very small product of about 0.01 to 0.03 g, it adheres to the take-out head 25 at the dropping position A. It may be left as it is. Therefore, in the present invention, air is blown from the take-out head 25 and dropped. Further, as shown in the figure, each receiving box 19 is formed of a wire mesh so that blown air can escape, or has a large number of small holes, so that it can be reliably dropped from the ejection head 25 of the molded product. In addition, the molded product in the receiving box 19 is prevented from scattering, so that the molded product can be stably received and collected.

In the above embodiment, an example is shown in which the molded product is taken out from the four-cavity mold cavity, but the present invention is not limited to this. Further, in the above embodiment, the table is provided with four receiving portions, but the present invention is not limited to this. This receiving part is installed in the number corresponding to the number of divided rotations of the table, but the number of receiving parts and the size of the receiving box are determined by the size of the molded product and the setting of the predetermined number of moldings. To be For example, when the molded product is a small-sized connector, the angle of one-division rotation is 90 degrees, and the receiving portions are four locations, or 180 degrees are two locations, and the predetermined number of moldings is about 1000 to 2000 shots (2 to 3 hours). Good to do. Further, in the above example, the unloader was erected on the fixed plate, but the present invention is not limited to this example, and it may be erected on the machine base, for example.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a mold clamping device in an injection molding machine that enables implementation of a molded product collecting system according to the present invention.

FIG. 2 is an explanatory view showing the mold clamping device as viewed from above.

FIG. 3 shows a table in the collection unit, which includes (a)
Is an explanatory view showing a state seen from above, and (b) is an explanatory view showing a state seen from a side.

[Explanation of symbols]

1 ... Mold clamping device 9 ... Collection department 14 ... table 16 ... Receiver 18 ... Tray 19 ... Inbox 20 ... unloader 25 ... Take-out head A ... drop position B: Tray removal position

Claims (2)

[Claims] 1. A rotatable table is provided while setting an upper part from a retracted position of a movable plate to an end of a mold clamping device having a mold cavity for taking a plurality of mold cavities as a collected part of molded products.
A take-out machine having means for transferring the molded article to the collecting section is arranged, and the take-out machine takes out the molded article after the mold is opened.
The molded product is dropped on the recovery unit according to the molding arrangement of the molded product of the mold cavity, and the table is provided with a plurality of receiving units made of removable receiving boxes at regular intervals in the rotation direction. Is rotated in a divided manner to correspond to the molding product dropping position, and the molding products dropped from the unloader are received by the receiving section in the divided state according to the molding arrangement of the molding products. A molded product collecting system for an injection molding machine, which collects a molded product from a moved receiving portion. 2. Each of the receiving parts comprises a plurality of receiving boxes according to the number of molded products to be taken in the mold cavity, and the receiving boxes in the receiving parts depend on the molding arrangement of the molded products of the mold cavity. The molded product collecting system in the injection molding machine according to claim 1, which is arranged.