JPH0539862Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a purge material discharge device for an injection molding machine that discharges the purge material injected during the purging operation of the injection molding machine.

[Conventional technology]

Traditionally, with injection molding machines, at the start of molding,
Purge work is generally performed at the end of molding or when changing materials or colors. For example, during the purging process at the end of molding, the remaining material inside the injection molding machine must be purged several times (sometimes more than 10 times).
Purging is the process of discharging all of the remaining material from the injection nozzle to the outside. Conventionally, this purge material discharged to the outside has been manually removed and discharged.

[The problem that the idea aims to solve]

However, the conventional manual process of removing and discharging the purge material is
(a) Since the purge material purged from the injection nozzle is at a high temperature, the work must be carried out with extreme caution, and if care is not taken, there is a problem that the work may be accompanied by dangers such as burns.

In addition, (b) As mentioned above, it is normal to perform purging at least several times (sometimes more than ten times), so the purge material discharged during each purge is removed each time. There was a problem that the process was very troublesome and time consuming because it had to be disposed of.

Furthermore, (c) with the automation of injection molding machines in recent years,
There is a demand for automation of the removal and discharge processing of the purge material.

This idea aims to solve all of the problems (a) and (b) above and to put the request (c) into practical use.It is an injection molding method that can automatically remove and discharge the purge material without manual intervention. The purpose is to provide a machine purge material discharge device.

[Means for Solving the Problems] In order to achieve the above object, this invention provides an injection molding machine with a rotatable bucket that is linked to a rotating means, and when purging material, the rotating means moves the bucket to the injection molding machine. A wiping plate having appropriate elasticity is provided in front of the bucket, and a wiping hole is formed in the wiping plate to receive the tip of the injection nozzle. This is what happens.

In addition to the rack and pinion shown in this embodiment, the rotating means may be designed using a link mechanism or other mechanisms as appropriate. Also,
The rotating means and the injection molding machine are electrically or mechanically linked so that the rotating means automatically positions the bucket behind the injection nozzle when the injection molding machine is purged, and when the purge is finished, the bucket is automatically positioned behind the injection nozzle. It is preferable that the purge material received in the bucket is discharged to the outside by the rotating means.

In addition, if the purge material cannot be removed from the injection nozzle by gravity due to the viscosity of the purge material, a wiping plate with appropriate elasticity is provided in front of the bucket, and a wiping hole is formed in the wiping plate. do. Appropriate elasticity of the wiping plate means elasticity to the extent that the tip of the injection nozzle can be inserted into the wiping hole of the wiping plate by the rotational force of the rotating means. Further, it is preferable that the wiping plate is removably attached using screws or the like, and its position can be adjusted back and forth, up and down, and left and right, so that the injection nozzle and the wiping hole can be aligned. The diameter of the wiping hole is preferably about 3 to 8 times the diameter of the injection nozzle.

[Effect]

According to this invention having the above configuration, during purging, the bucket is positioned behind the injection nozzle of the injection molding machine by the rotating means, and receives the purge material purged from the injection nozzle into the bucket. At the end of purging, the purge material received in the bucket is rotated together with the bucket by the rotating means, so that only the purge material is discharged to the outside. The purging operation is completed by repeating the purging material discharge operation a required number of times.

In addition, when the bucket is located behind the injection nozzle, the tip of the injection nozzle is inserted into the wiping hole of the wiping plate, and when the bucket is rotated at the end of purging, as shown in Figures 4A and 4B, , the purge material that drips from the injection nozzle that cannot be cut off due to gravity is cut off at the peripheral edge of the wiping hole, and this purge material is cut into the bucket.

〔Example〕

An embodiment of this invention will be described below with reference to FIGS. 1 to 5.

In FIG. 5, reference numeral 1 denotes a known injection molding machine, and this injection molding machine 1 has a molding device 3 provided at the upper rear of a molding machine main body 2, and an injection device 4 provided at the front.

A fixed platen 5 is provided in front of the molding device 3, and the fixed platen 5 is formed with a tapered recessed injection port 5a.

The injection device 4 is movably provided in the molding machine body 2 by means of hydraulic cylinders 6, 6, and is connected to the fixed plate 5.
An injection nozzle 7 is provided in front of the injection device 4 facing the injection port 5a of While the material is injected from the injection nozzle 7 into the molding device 3 through the injection port 5a, during, for example, a purge operation after the injection molding is finished, the injection port 5a
and injection nozzle 7 are separated by hydraulic cylinders 6,6.

An injection molding machine purge material discharging device 10 according to the present invention shown in FIGS. 1 to 4 is provided in the upper part of the molding machine body 2 away from the liquid pressure cylinders 6, 6 and the injection nozzle 7. The injection molding machine 1 described above is one application example in which the injection molded material discharge device 10 of the present invention is provided, and it goes without saying that the injection molding machine 1 can be appropriately provided in other injection molding machines.

The injection molding machine purge material discharge device 10 includes a rotating means 11 and a bucket 2 interlocked with the rotating means 11.
The main configuration is 0.

The rotating means 11 is attached to the upper part of the molding machine body 2 by a bolt 1.
2a...The base 12 fixed by 12a, and the base 12
A rack 14 that interlocks with a hydraulic cylinder 13 attached to the base 12, and a pivot 1 rotatably provided on the base 12.
The rack 14 is screwed to the operating part 13a of the hydraulic cylinder 13 that moves up and down with respect to the base 12, and
The base end of an arm 17, one end of which is fixed to a bucket 20, is attached to a pivot shaft 15 provided with a pinion 16 with a screw 17a...
17a, and by operating the hydraulic cylinder 13 to move the rack 14 up or down.
From the pinion 16 that meshes with the rack 14 to the pivot 15
The arm 17 is rotated via the arm 17, and by the rotation of the arm 17, the bucket bag 20 can be rotated to the position shown by the solid line or chain line in FIG. The rotating means 11 is not limited to the one having the above-mentioned configuration, but may be of any type as long as it can rotate the bucket bag. In Figure 3,
9, 9 are bearings that rotatably support the pivot 15 on the base 12.

Further, as the fluid pressure cylinder 13, a cylinder operated by gas such as gas or liquid such as oil can be selected and used as appropriate. Reference numerals 18 and 18 indicate position detection sensors that detect whether the rack 14 provided on the operating portion 13a of the hydraulic cylinder 13 is located at the upper or lower limit of its stroke. These position detection sensors 18, 18 can detect whether the bucket 20 is in the purge position behind the injection nozzle 7 shown by the solid line in FIG. 1 or in the discharge position shown by the chain line in the same figure. Therefore, it can be used as appropriate, such as timing the forward and backward movement of the injection nozzle 7 using the fluid pressure cylinders 6, 6, or performing purging after confirming that the bucket 20 is in the purge position.

The bucket 20 has a discharge port 21 that is open at the top, and a notch 22 on the front surface of the bucket 20.
, and screw the wiping plate 23 into the bucket 20 with screws 23a...
The wiping plate 23 has a wiping hole 23b into which the injection nozzle 7 is inserted. Further, in this embodiment, when the arm 17 is fixed to the mounting plate 20a of the bucket bag 20, long holes 20b are formed in the mounting plate 20a to be long from left to right in FIG.
20b to the arm 17 with screws 17a...17a, and when fixing the wiping plate 23 to the bucket 20, the wiping plate 23 is fixed to the arm 17 through long holes 23c...23c formed vertically in the wiping plate 23. Since it is fixed to the bucket 20 with screws 23a...23a, the injection nozzle 7 and the wiping hole 23b
Even if the injection nozzle 7 and the wiping hole 23b do not match during purging due to misalignment, the screw 17a
. . . 17a, 23a .
The position of the wiping hole 23b can be adjusted so that the wiping holes 23b are aligned with each other. Further, the shape of the bucket bag 20 is not limited to that of the embodiment, and may be of other shapes such as a cylindrical shape.

According to the bucket 20 and the rotating means configured in this way, the bucket 20 is on standby at the purge material discharge position shown by the chain line in FIG. 1 during molding. At the start of molding, at the end of molding, or when changing materials or colors, the rack 14 is moved downward by the fluid pressure cylinder 13 of the rotating means 11, and the rack 14 rotates the pinion 16 clockwise to move the bucket belt 20. When the bucket 20 is turned in the direction of arrow A and the rack 14 reaches the upper limit position, the bucket 20 is placed in the purge position shown by the solid line in FIG. At this time, the injection nozzle 7 is inserted into the wiping hole 23b as shown in FIG. 4A. Then, the purge operation was started and the first purge was performed as shown in Figure 4A.
The purge material M injected from the injection nozzle is bucketed 2
Received within 0. When the purge is finished,
The rack 14 is moved upward by the fluid pressure cylinder 13, and at the same time, the elasticity of the wiping plate 23 causes the wiping plate 23 to bend backward, the injection nozzle comes off from the wiping hole 23b (Fig. 4B), and the bucket 20 moves in the direction of arrow B. It turns and returns to the solid line position. At this time,
The purge material M in the bucket 20 is discharged to a predetermined location by the discharge chute 8 disposed below the bucket 20 due to the vibration of the rotation stop and gravity. 2
After the first time, the above operation is repeated a required number of times to complete the purging operation.

[Effect of idea]

According to this invention configured as described above, an injection molding machine is provided with a rotatable bucket which is linked to a rotating means, and when material is purged, the bucket is positioned behind the injection nozzle of the injection molding machine by the rotating means. (1) Since the purge material purged from the injection nozzle can be received in a bucket and automatically discharged, the purge material can be safely removed and discharged without manual intervention. It can be carried out.

Furthermore, (2) the purge material can be discharged by rotating the bucket using the rotating means, so that the discharge operation can be carried out smoothly and in an extremely short period of time.

Furthermore, (3) a wiping plate with appropriate elasticity is provided in front of the bucket, and a wiping hole into which the tip of the injection nozzle is inserted is formed in the wiping plate, so even if the viscosity of the purge material Even if purge material that cannot be removed by gravity drips from the tip of the injection nozzle, the wiping hole allows the purge material to be reliably removed from the injection nozzle and removed without leaving any remaining material on the injection nozzle. .

[Brief explanation of the drawing]

The figures show one embodiment of this invention, in which Fig. 1 is a front view of an injection molding purge material discharge device, Fig. 2 is a side view of Fig. 1, and Fig. 3 is a side view of Fig. 1. FIG. 4 is a plan view, FIG. 4 is a partial vertical sectional view, and FIG. 5 is a side view showing one application example. 1... Injection molding machine, 7... Injection nozzle, 11...
...Rotating means, 20...bucket, 23...wiping plate, 23b...wiping hole.

Claims (1)

[Scope of utility model registration request] The injection molding machine is rotatably provided with a bucket 20 that is linked to a rotating means 11, and the bucket 20 is configured to be positioned behind the injection nozzle 7 of the injection molding machine by the rotating means 11 during material purging. A wiping plate 23 having appropriate elasticity is provided in front of the bucket 20, and the wiping plate 23 has a wiping hole 23b into which the tip of the injection nozzle 7 is inserted. Device.