JP2515682Y2 - Automatic purging material discharge device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a purge material automatic discharging device used for effectively utilizing a purge material which is used when a material is changed in an injection molding machine.

[0002]

2. Description of the Related Art In an injection molding machine, a molten resin is discharged and supplied by an injection device into a cavity to manufacture a molded product according to the shape of the cavity. However, when changing the color of the molded product or changing the resin used. The purging operation is performed along with the change of the supplied resin. For example, in the case of color change, generally, the shutter at the bottom of the hopper of the injection device is closed, and blank ejection is performed several times so that the material in the cylinder is extruded to the front. Then, new material is supplied to the hopper, the shutter is opened, and the blank is struck ten or more times until the color change is completed.

In the conventional purging operation, a baffle plate is provided on the front surface of the injection nozzle to temporarily receive the blanked purge material and drop it downward, so that the purging is performed in a container installed at the dropping position. The material was put in, and at a stage where a certain amount of the material had accumulated, the material was collectively left to cool and solidify, and the solidified purge material was thrown away by human work.

[0004]

However, the purge material taken out is a resin material and becomes a so-called industrial waste, and there is a problem that its disposal becomes difficult. It has a drawback that it produces industrial waste. Further, since other compounds are mixed in such a lump of the purge material, it can be regenerated, but it is very difficult. Further, since the shape of the purge material after cooling is not constant, crushing is impossible.

The present invention focuses on the above-mentioned conventional problems and aims at effective utilization of resources by allowing the purging material to be reproducibly taken in and being discharged into a proper size that can be crushed by a crusher. It is an object of the present invention to provide an automatic purging material discharging device capable of achieving the above.

[0006]

In order to achieve the above object, an automatic purging material discharging device according to the present invention is installed in a position facing an injection nozzle of an injection molding machine so as to be able to move in and out, and is a purged blank. A chute which receives the material and is provided with a cooling water jacket, a reversing bucket which is arranged below the chute and which is capable of water-cooling by temporarily accommodating the purge material falling from the chute, and below the reversing bucket. The cooling water tank is installed, and a conveyor that conveys the purge material charged into the cooling water tank is provided.

[0007]

According to the above construction, the moving chute moves in and out of the position facing the injection nozzle, and receives the purged material that has been idle-dried. The chute is cooled by the cooling water jacket, and the purge material is collision cooled and drops. The dropped purge material is put into a lower reversing bucket and is cooled by sprinkling water, and a predetermined amount is collected. The reversing bucket is reversing driven, but the reversing cycle is adjusted so that it is reversing driven when the size of the containing purge material is just large enough to be applied to the crusher. Then, the purge material, which is made to have an appropriate size by reversing the bucket, is put into the cooling water tank, conveyed by the conveyor immersed in the cooling water tank, and taken out after a lapse of a predetermined time. Since the purge material falls from the chute and is placed in the cooling water after the blank injection, the compound is not mixed in the middle of the chute, and the regeneration treatment can be easily performed. Therefore, the blanked purge material can be taken in so that it can be reused as an effective resource.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A concrete embodiment of the purge material automatic discharge device according to the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a side view showing the structure of an automatic purging material discharging device according to an embodiment. This apparatus is provided with a movable chute 10 which can move in and out between an injection nozzle (not shown) and a mold to which the injection nozzle is connected. The moving chute 10 is formed by a semi-cylindrical portion 12 and an inclined plate portion 14 provided at the lower end of the semi-cylindrical portion 12. The semi-cylindrical portion 12 is positioned in front of the injection nozzle by horizontal movement, and the blanked purge material is placed. The catch is designed to be dropped onto the inclined plate portion 14. An air cylinder 16 is connected to the upper end of the chute 10 for moving the chute 10 so that the moving chute 10 can escape to the side during the injection operation (the position indicated by the imaginary line in the drawing) and be moved to the front surface of the injection nozzle during the purging operation. ing.

A fixed chute 18 is arranged below the moving chute 10 when the moving chute 10 moves to the working position. The fixed chute 18 is provided on the inclined plate portion 14
It is composed of a swash plate that is inclined from the beginning so that the inclination angle becomes larger, and the purge material falling from the upper moving chute 10 is guided and flowed in a predetermined direction.

The purge material that has been shot from the injection nozzle is directly received by the moving chute 10, flows down the inclined plate portion 14 thereof, and then is transmitted to the fixed chute 18 and flows down. During this time, the high temperature purge material is cooled. As described above, the inclined plate portion 14 of the moving chute 10 and the fixed chute 1 are
A cooling water jacket 20 is attached to each of the eight so as to cover the back surface of the cooling water jacket 8 so that cooling water can flow into the jacket 20. The cooling water is supplied from the lower end side of the fixed chute 18, flows out from the upper end side thereof, is further guided to the lower end side of the inclined plate portion 14 and flows through a series of cooling water passages 22 so as to flow out from the upper end side thereof. It is like this. Cooling water channel 2 connected to the inlet and outlet of each jacket 20
Reference numeral 2 is formed by a flexible tube such as a hose, and it suffices that the movement of the moving chute 10 is not obstructed.

At the falling end position of the fixed chute 18,
The large cooling water tank 24 is installed in a state of being supported on the floor surface so that the dropped purge material can be introduced. However, the purge material that has flowed down between the cooling water tank 24 and the fixed chute 18 is temporarily held. A bucket 26 is installed for the purpose of practical storage. The bucket 26 is formed in a container shape having an upper opening. The lower surface of the water tank 24 is supported by a support column 28 provided on the wall surface of the water tank 24, and is mounted such that the bucket opening is turned toward the cooling water tank 24 via a horizontal shaft 30. By this reversal, the bucket 26 flows down from the fixed chute 18 and the purge material temporarily stored therein is put into the cooling water tank 24. In order to cause the reversing bucket 26 to perform a tilting operation, the air cylinder 3 is attached to the rear end surface of the bucket.
The two are connected and driven by the expansion and contraction action so that the opening of the bucket 26 is directed toward the fixed chute 18 or is inverted and directed toward the cooling water tank 24. Then, when the bucket 26 is reversed, the stored purge material is transferred to the cooling water tank 24.
An inclined chute surface is attached to the front wall surface on the tip side of the tilt so that it can be dropped and thrown into. The internal volume of such a reversing bucket 24 is set so that the size of the contained purge material can be crushed by a crusher.

The cooling water tank 24 is filled with cooling water 34 so that the charged purge material can be submerged and cooled. And this cooling water tank 24
At the point of fall from the reversal bucket 26 in, a conveyor 36 is installed with part of it submerged. The conveyor 36 is formed by a mesh belt,
The purge material is immersed in the cooling water. Such a conveyer 36 is an inclined conveyer, and is configured to submerge the end of the purge material on the falling portion side and gradually raise and incline it to convey the received purge material onto the water surface. There is. The conveyor tip of the conveyor 36 is projected to the outside of the water tank 24, and the carried purge material is dropped from the tip to the outside of the water tank 24. Conveyor 3
A carrier truck 38 is placed at the portion where 6 is dropped so that the lump of the purge material that has been conveyed in the cooled and solidified state can be accommodated and transferred to another location.

Here, a sprinkler 40 is provided to cool the purge material placed in the reverse bucket 26 and on the conveyor 36. This has a plurality of shower nozzles 42, and is arranged directly above the reversing bucket 26 so as to spray water toward the purge material inside, and is also arranged above the conveying path of the conveyor 36 and is in the middle of conveyance. It is designed to spray water toward the purge material. Further, a supplementary water supply valve 44 to the cooling water tank 24 is provided in addition to this, and a supplementary water is supplementarily supplied by a water level detector 46. These are connected to a cooling water passage 22 to the chutes 10 and 18 and supplied.

In the purge material automatic discharging device thus constructed, the moving chute 10 is moved to the front face of the injection nozzle in advance during the purging operation. In this state, the semi-cylindrical portion 12 of the moving chute 10 is located so as to face the nozzle and can receive the resin that has been blank-dried. The purge material continuously colliding with the moving chute 10 by a plurality of idle shots is guided by the chute 10 to be fluidized, and is accumulated in the reversing bucket 26 along the fixed chute 18 below. In the chutes 10 and 18, cooling water is supplied to the jacket 20 to cool the purge material, and the bucket 2
It is stored in 6. Further, the bucket 26 has a sprinkler 40.
The cooling water is sprinkled by the purging material, and the purging material changes from the molten state to the solidified state. The bucket 26 is given a reversing operation by the air cylinder 32 in a constant cycle, and drops the stored purge material into the cooling water tank 24 below. This inversion cycle is set to invert when the size of the purge material in the bucket 26 becomes a size that can be crushed by a crusher in a subsequent process. The purge material that has fallen into the cooling water tank 24 due to the reversing operation of the bucket 26 is submerged in the water, but since the conveyor 36 is installed at the falling location, the purge material is placed on this and is conveyed according to the drive of the conveyor 36 while being transferred to the water. Is gradually raised from. Since the water spray cooling from the water spray device 40 is also applied to this transport path, the lumped purge material is solidified. The conveyor 36 sends out the solidified purge material to the conveying end and stores it in the waiting carriage 38.

The purging material thus taken in is constantly sized so that it can be crushed by the reversing bucket 26 and cooled to be solidified, so that the post-treatment is very easy and the solidification No foreign matter or compound is mixed in the process, and it becomes extremely easy to reuse it. As a result, it is possible to reuse the purging material that was conventionally discarded as industrial waste, and to effectively use resources. Since the solidifying and containing work of the purge material can be performed without manual work, the work efficiency can be improved and the work of color change and material change can be performed quickly. You can do it.

As described above, according to the present invention,
A chute provided with a cooling water jacket, which is mounted so as to be able to move in and out at a position facing the injection nozzle of the injection molding machine, and has a cooling water jacket, and a purge material which is arranged below the chute and drops from the chute. A reversing bucket that is temporarily accommodated and is capable of sprinkling cooling, and a cooling water tank installed below the reversing bucket,
Since it is configured to include a conveyer that conveys the purge material that has been put into this cooling water tank, an automatic discharge operation of the purge material can be realized, and the generated purge solid material can be discharged in a form that can be reused. An excellent effect that the effective use of can be achieved can be obtained.

[Brief description of drawings]

FIG. 1 is a side view showing a configuration of a purge material automatic discharge device according to an embodiment.

[Explanation of symbols]

 10 Moving Chute 18 Fixed Chute 20 Cooling Water Jacket 22 Cooling Water Channel 24 Cooling Water Tank 26 Inversion Bucket 32 Air Cylinder 36 Conveyor 38 Transport Cart 40 Sprinkler

Claims (1)

(57) [Scope of utility model registration request] 1. A chute provided with a cooling water jacket, which is mounted so as to be able to move in and out at a position facing an injection nozzle of an injection molding machine, and has a cooling water jacket, and the chute arranged below the chute. A reversing bucket that temporarily accommodates the purge material that is falling from and is capable of sprinkling cooling, a cooling water tank installed below the reversing bucket, and a conveyor that conveys the purge material that has been put into this cooling water tank. An automatic purging material discharging device characterized by being provided.