JPH0552246B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the configuration of a recycling device for an injection molding machine that collects sprue separated from an injection molded resin product.

The present invention is suitable for use in a line for manufacturing large resin molded products made of different types of materials, such as automobile body parts.

〔overview〕

The present invention provides a recycling device for an injection molding machine that collects and reuses sprue separated from a resin molded product taken out from an injection molding machine. Therefore, even if the injection molded products are made of different materials (color and quality), automatic collection is possible by having different sprue ducts.

[Conventional technology]

Traditionally, sprue generated along with products from injection molding machines has been either treated as waste material or manually collected, sorted, crushed, and mixed with new raw materials for reuse. .

However, in the case of large resin molded products such as those used for automobile body parts, it is undesirable to discard them in terms of resource conservation and pollution. In addition, performing the collection process manually is not labor-saving and has the disadvantage that foreign matter may be mixed in.

For this reason, the product with the sprue carried out from the injection molding machine is held by separate chucks for the product itself and the sprue, and the sprue is first separated by operating the sprue chuck, then released, and then automatically processed. Recycling equipment is known that automatically performs the recycling operation of collecting raw materials, pulverizing them, and mixing them into new raw materials.

[Problem that the invention seeks to solve]

However, this conventional device has only one path for pulverizing the collected sprue and mixing it with the raw material.
There was a drawback that it could not be used when the material or color of the product was different.

The present invention aims to improve this and to provide a recycling device for an injection molding machine that is capable of automatic recovery even when many types of materials are used.

[Means for solving problems]

The present invention provides an injection molding machine recycling apparatus that includes means for separating a sprue from a product taken out from the injection molding machine, and means for pulverizing the sprue and mixing raw materials to be supplied to the injection molding machine. a tray for receiving the sprue detached by the detaching means; a moving means for moving the tray to a plurality of different positions and discharging the sprue;
A plurality of sprue ducts are provided at the plurality of positions, and a control means for controlling the moving means according to a set program, and the mixing means is provided individually corresponding to the plurality of sprue ducts. , the control means controls the moving means based on the injection order and number of injections for each material according to a preset production plan, moves the tray to a different position for each material, and releases the sprue. It is characterized by comprising means.

Preferably, the tray is configured to discharge the received sprue into the sprue duct by tilting it.

[Effect]

The tray receiving the detached sprue is automatically moved to a selected one of the plurality of sprue ducts. This movement is controlled by a program and is performed quickly and reliably.

Since each sprue duct is individually provided with means for pulverizing the sprue and mixing it with new raw materials, contamination of different raw materials does not occur.

〔Example〕

An embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows a schematic diagram of the above embodiment, and FIG. 2 is a block diagram including an injection molding machine. Second
In the figure, thick solid lines indicate the flow of raw materials, and thin solid lines indicate electrical signals.

In FIG. 2, raw material A is supplied to No. 1 injection molding machine 21A, and raw materials B and C are supplied to No. 2 injection molding machine 21B through injection sections 22A and 22B, respectively. Injection molded.

The products with sprue taken out from the injection molding machine are transported to conveyors 23A and 23B, respectively.
The cargo is delivered to the hangers 24A and 24B mounted on the hangers 24A and 24B and transported. Conveyors 23A and 23B transfer to a common conveyor 23C at a branching point 25A, and the sprues and products are sent to a point H where they are removed.

In FIG. 1, the hangers 24A and 24B have a product chuck 3 holding the product 1 and a sprue 2.
There is a sprue chuck 4 that holds A.

When releasing the product 1, the release device 4B acts on the lever 4A of the sprue chuck 4, and the sprue 2
A is removed as shown at 2B. Next, after a predetermined period of time, the release machine 3B acts on the lever 3A of the product chuck 3 to release the product 1, and the product 1 is transported by the belt conveyor 5 to a finishing work place (not shown).

On the other hand, when the detached sprue 2B is material A, this sprue is put into the sprue duct 9A and crushed by the crusher 10A. This crushed sprue is mixed with fresh raw material in the supply hopper 17A (FIG. 2) by the jet selector 13A,
The suction device 18A sends the raw material to the injection section hopper 12A, which supplies the raw material to the injection section 22A.

Since two types of raw materials, B material and C material, are supplied to the No. 2 injection molding machine, shutters 19B and 19
Sort this by C.

Here, the feature of the present invention is that the tray 8 receives the detached sprue 2B at a predetermined position.
The tray 8 is moved by the carrier 7 driven by the carrier chain 16 to three positions regulated by limit switches 16A, 16B and 16C, respectively, and the tray 8 is tilted at each position, so that the The structure is such that sprue is fed into predetermined sprue ducts 9A, 9B and 9C. Each sprue duct has a crusher 10 for crushing the sprue.
A, 10B and 10C, and jet selectors 13A, 13B and 13C that mix with new raw materials
are provided separately. Furthermore, the movement of the carrier 7 is program-controlled by a central controller 32 via an input/output interface 31.

Next, the operation of this embodiment will be explained using FIG.

When the central control device 32 instructs molding using the raw material B, the shutter 19B is opened by the signal a, the raw material B is supplied from the injection part hopper 12B to the injection part 22B, and is injected by the signal b. The injection molded product is delivered from the No. 2 injection molding machine 21B to the hanger 24B as shown by the broken line, and then transferred to the conveyor 2.
3B and the conveyor 23C via the branch part 25A.
It is transported to the point H where it leaves. Product detector 26
B detects the product that has arrived at the hanger 24B and sends a signal c. The signal c notifies the central controller 32 that material B or material C has passed and the time of its passage. The central controller 32 uses signals a and c to confirm that the product of material B is being transported, and when the hanger 24B reaches a predetermined position H, it operates the detacher 4B using the signal d to release the product of material B. The sprue 2B is removed and received by the tray 8 indicated by the broken line.

The central control device 32 starts the carrier motor 16M in response to a signal e to move the carrier 7 via the carrier chain 16, and operates the limit switch 16B in response to a signal f to cause the tray 8 to correspond to the sprue duct 9B as shown by the solid line. stop in position. Then, the signal g causes the inclinator 2 to
When the tray 8 is tilted by the sprue 7B, the sprue is discharged into the sprue duct 9B and is crushed by the crusher 10B.

During the above operation, the hanger 24B operates the detaching machine 3B in response to the signal h to detach the product 1 onto the belt conveyor 5, and transports it to a finishing workplace (not shown).

The recovered B material crushed as described above is stirred and mixed with the new B material in the supply hopper 17B by the jet selector 13B activated by the signal j.
When the suction machine 18B is activated by the signal k, the liquid is supplied to the injection part hopper 12B.

Since the injection order for each material and the number of consecutive injections for each material are input in advance to the central control device 32 according to the production plan, products are automatically produced according to this program.

〔Effect of the invention〕

According to the present invention, even in a process where many types of materials are used, it is possible to distinguish them and automatically collect sprues. This eliminates material contamination. In particular, it is more efficient and less prone to errors than manual classification.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of one embodiment of the present invention. FIG. 2 is a block diagram for explaining the operation of the above embodiment. 1... Product, 2A, 3A... Sprue, 3...
Product chuck, 3A, 4A... Lever, 3B, 4
B...Removal device, 4...Spruochak, 5...
Belt conveyor, 7...Carrier, 8...Tray, 9A, 9B, 9C...Sprue duct, 10
A, 10B, 10C...Crusher, 12A, 12
B, 12C... Injection part hopper, 13A, 13B,
13C...Jet selector, 16...Carrier chain, 16A, 16B, 16C...Limit switch, 16M...Carrier motor, 17A, 1
7B, 17C... Supply hopper, 18A, 18B,
18C...Suction machine, 19B, 19C...Shutter, 21A...No.1 injection molding machine, 21B...No.2
Injection molding machine, 22A, 22B...Injection part, 23
A, 23B, 23C... Conveyor, 24A, 24
B...Hanger, 25A, 25B... Branch, 26
A, 26B...Product detector, 27A, 27B, 2
7C... Inclinator, 31... Input/output interface (I/O), 32... Central control unit (CPU),
33...Control bus, a to h, j, k...Signal, H...
...The location where the sprue and product are separated.

Claims (1)

[Scope of Claims] 1. An injection molding machine recycling device comprising means for separating sprue from a product taken out from the injection molding machine, and means for pulverizing the sprue and mixing raw materials to be supplied to the injection molding machine. a tray for receiving the sprue detached by the detaching means; a moving means for moving the tray to a plurality of different positions and discharging the sprue; a plurality of sprue ducts provided at each of the plurality of positions; a control means for controlling the moving means according to a preset program; the mixing means is individually provided corresponding to the plurality of sprue ducts; and the control means is configured to control the moving means according to a preset production plan. A recycling device for an injection molding machine, comprising means for controlling the moving means based on the injection order and number of sprues for each material, and moving the tray to a different position for each material to eject sprue.