JPS6334114A - Recycling device of injection molder - Google Patents

Abstract

PURPOSE:To make it possible to automatically recover materials even when the materials of injection-molded products are different from one another a plurality of sprue ducts are provided for recovery and separated sprues are charged in spure ducts, which are different in response to the kinds of material of the separated sprue. CONSTITUTION:In No.2 injection molder, two kinds of raw materials or material A and material B are supplied by being distributed with shutters 19B and 19C. A tray 8, which receives a separated sprue 2B at the predetermined position, is shifted by a carrier 7 driven with a carrier chain 16 to one of 3 positions controlled by one of limit switches 16A, 16B and 16C and tilted so as to charge the sprue to the predetermined sprue duct of 3 sprue ducts 9A, 9B and 9C. In the respective sprue ducts, grinders 10A, 10B and 10C, each of which grinds sprues, and jet selectors 13A, 13B and 13C, each of which mixes sprues with virgin raw material, are respectively and separately provided. Because means to grind sprues and to mix them with virgin raw material are individually provided in each sprue duct, the mixing of different raw material does not occur.

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, by introducing the materials into different sprue ducts, it is possible to automatically collect the materials of injection molded products (even if the materials are different in color and material).

[Conventional technology]

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

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 body and the sprue part, and the sprue is first separated by operating the sprue chuck, and then released. Recycling equipment is known that automatically performs a recycling operation in which materials are automatically collected, crushed, and mixed into new raw materials.

[Problem that the invention seeks to solve]

However, this conventional apparatus has a drawback that it cannot be used when the materials or colors of the products are different because the route for pulverizing the collected sprue and mixing it with the raw material is one system.

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 sprue detached by the detaching means, a moving means for moving the tray to a plurality of different positions and discharging the sprue, and a plurality of sprue ducts respectively provided at the plurality of positions, A mixing means is provided individually corresponding to the plurality of sprue ducts, and the moving means includes a control means controlled by a set program.

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. In FIG. 2, thick solid lines indicate the flow of raw materials, and thin solid lines indicate electrical signals.

In Fig. 2, No. 1 injection molding machine 21A has raw material personnel, and No. 2 injection molding machine 21B has raw material B.
Material and C material are supplied through injection parts 22A and 22B, respectively, and injection molded.

The sprue-attached products taken out from the injection molding machine are delivered to hangers 24A and 24B mounted on conveyors 23A and 23B, respectively, and conveyed. 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 Figure 1, hanger 24A C24B) has product 1.
There is a product chuck 3 that holds the sprue 2A and a sprue chuck 4 that holds the sprue 2A.

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

On the other hand, when the detached sprue 2B is material A, this sprue is put into the sprue duct 9A and the crusher 10A
crushed by. This crushed sprue is fed to the feed hopper 1
7A (Figure 2) new raw material and jet selector 13A
The raw materials are mixed by the suction machine 18A and sent to the injection section hopper 12A which supplies raw materials to the injection section 22A.

Since the No. 2 injection molding machine is supplied with two types of raw materials, material B and material C, these are distributed by shutters 19B and 19C.

Here, the feature of the present invention is that the tray 8 that receives the detached sprue 2B at a predetermined position is regulated by a carrier 7 driven by a carrier chain 16 at three locations by limit switches 16A, 16B, and 16C, respectively. , the tray 8 is tilted at each position, and the sprue is fed into a predetermined one of the three sprue ducts 9A19B and 9C provided close to each other. Each sprue duct has a crusher 10A, IOB, and 10C for crushing the sprue, and a jet selector 13 for mixing the new raw material.
A, 13B and 13C are provided separately.

Moreover, the movement of the carrier 7 is performed by the input/output interface 3.
1 via a central control unit 32.

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

When the central controller 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 A. 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 is conveyed via the conveyor 23B and branch section 25A to a location H where it leaves on the conveyor 23C. Product detector 2
6B detects the product that has arrived at the hanger 24B and transmits 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 confirms that the product of B material is being conveyed by the signals a and C, and when the hanger 24B reaches the predetermined position H, it operates the detacher 4B by the signal d to remove the product of B material. The sprue 2B is removed and the receiver is placed on the tray 8 shown by the broken line.

The central controller 32 controls the carrier motor 16M by the signal e.
is activated to move the carrier 7 via the carrier chain 16, and the limit switch 16 is activated by the signal f.
B is operated to stop the tray 8 at a position corresponding to the sprue duct 9B as shown by the solid line. Then, when the tray 8 is tilted by the tilter 27B in response to the signal g, the sprue is discharged into the sprue duct 9B and crushed by the crusher 10B.

During the above operation, the hanger 24B is moved to the detachment machine 3 by a signal.
B is activated to release the product 1 onto the belt conveyor 5, and transport it to a finishing workplace (not shown).

The recovered material B crushed as described above is stirred and mixed with the new material B in the supply hopper 17B by the jet selector 13B activated by the signal j, and then the suction machine 1 is activated by the signal k.
When 8B starts, it is supplied to the injection section 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 the drawing]

FIG. 1 is a schematic diagram of one embodiment of the present invention. FIG. 2 is a block configuration diagram for explaining the operation of the above embodiment. 1...Product, 2A, 3A...Sprue, 3...Product chuck, 3A, 4A...Lever, 3B, 4B...
・Detachment device, 4... Sprue chuck, 5... Belt conveyor, 7... Carrier, 8... Tray, 9A,
9B, 9C... Sprue duct, IOA, IOB, I
OC...Crusher, 12A, 12B, 12c...Injection part hopper, 13A, 13B, 13C...Jet selector, 16...Carrier chain, 16A, 16B, 1
6C... Limit switch, 16M... Carrier motor, 17A, 17B, 17C... Supply hopper, 18
A, 18B, 18C...Suction machine, 19B, 19C...
・Shutter, 21A...No, 1 Injection molding machine, 21
B...No, 2 injection molding machine, 22A, 22B...injection part, 23A, 23B, 23C...conveyor, 24A
, 24B... hanger, 25A, 25B... branching part,
26A, 26B...Product detector, 27A, 27B, 2
7C... Inclinator, 31... Input/output interface (
Ilo), 32... Central control unit (CPU), 33.
...control bus, a to h, j, k...signal, H...point where the sprue and product are removed. Patent applicant Hino Motors Co., Ltd. Representative Patent attorney Naotaka Ide 31 Figure

Claims (2)

[Claims] (1) In an injection molding machine recycling device that is equipped with a means for separating sprue from a product taken out from the injection molding machine, and a 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 means for moving the tray, a moving means for moving the tray to a plurality of different positions and discharging the sprue, and a plurality of sprue ducts respectively provided at the plurality of positions; A recycling device for an injection molding machine, characterized in that means for moving is provided individually corresponding to the plurality of sprue ducts, and the moving means includes a control means controlled by a set program. (2) The recycling device for an injection molding machine according to claim (1), wherein the tray is structured to discharge the received sprue to the sprue duct by tilting it.