JPH056091Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an automatic purge material processing device for automatically processing molten resin purged in an injection molding machine, that is, a purge material.

[Conventional technology]

Conventionally, molten resin is purged when changing materials or colors in injection molding machines, but this purged molten resin (hereinafter referred to as "purge material") is separated from the fixed platen 1 as shown in Fig. 4. The heating cylinder 3 was moved to a retracted position, and the molten resin was discharged from the nozzle 2 in the direction of arrow P to perform purging. For this reason, the purge material 9 scatters and adheres to the fixed platen 1 and the bed 4, making removal work time-consuming.

Therefore, in order to prevent the purge material from scattering and sticking on the stationary platen or bed, the following devices (a) or (b) have been proposed.

(a) A purge cover that prevents the purge material from scattering is rotatably provided between the front of the nozzle and the bottom of the nozzle (see Utility Model Application Publication No. 187015/1983), and a purge tray that receives the purge material. A purge material take-out device is swingably installed in a product take-out machine, and after receiving the purge with the purge tray during purging, moves the purge tray outside the machine and tilts it to discharge the purge material. (see Publication No. 2003) has been proposed.

(b) A hopper that receives purge material discharged from a nozzle of an injection molding machine, and a pair of rolling rollers disposed near the exit of the hopper, and rolls the purge material to form it into a plate shape. Purge material rolling mill (see Utility Model Application Publication No. 137514/1983).

[The problem that the idea attempts to solve]

Among the above conventional techniques, (a) can prevent the purge material from scattering onto the fixed platen or bed, but the purge material discharged outside the machine is dangerous because of its high temperature, and it hardens into lumps. It is difficult to recycle the purge material as it accumulates.

In addition, in (b), the hopper only receives the purge material that falls from the nozzle, so if the placement position is not set strictly, there is a risk that the purge material will scatter outside the hopper. In order to recycle the purge material, it is necessary to cut it into small pieces so that it can be fed to a crusher before being crushed in a separate process, which requires labor and time, resulting in high costs. There was a problem.

The present invention was devised in view of the above-mentioned problems of the conventional technology, and the purge material does not scatter onto the fixed plate or bed, and can be automatically processed and cut into small pieces. The purpose of this invention is to realize an automatic purging material processing device for an injection molding machine.

[Means to solve the problem]

In order to achieve the above object, the automatic purging material processing device for an injection molding machine of the present invention has two positions: a facing position facing the front surface of the nozzle of the heating cylinder in the retracted position of the injection molding machine, and a detached position separated from the facing position. a funnel-shaped upper gutter that is disposed below the caul plate at the facing position and guides the purge material that is purged from the nozzle and collides with the caul plate and falls; A pair of water-cooled stepped meshing rollers and a pair of meshing rollers are arranged in two stages in sequence below the upper gutter, and a lower gutter is arranged below the meshing rollers and slopes downward; The surfaces of the patch plate, the upper gutter, the pair of stepped interlocking rollers, the pair of interlocking rollers, and the lower gutter are each coated with tetrafluoroethylene resin, and the pair of interlocking rollers are coated with a polytetrafluoroethylene resin. It is also characterized by being configured to rotate at high speed.

[Effect]

The purge material purged from the nozzle collides with the backing plate and falls, and is guided to the upper gutter and cooled by a pair of stepped interlocking rollers that have notches. After being further cooled by a pair of water-cooled, high-speed rotating interlocking rollers, it is torn and cut into small pieces.
It is guided by the bottom gutter and discharged outside the machine.

〔Example〕

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

Figure 1 is a schematic front view of one embodiment of the present invention;
The figure is a schematic side view seen from the direction of the arrow in FIG. 1.

An automatic purge processing device 10 is disposed on a bed 4 of an injection molding machine between a fixed platen 1 and a retracted position of a heating cylinder 3 having a nozzle 2.

The automatic purge processing device 10 is configured as described below.

The L-shaped support member 18 has a fulcrum 1 whose one end is supported by a support (not shown) or the like that is erected on the bed 4.
It is rotatably supported by 8a, and a backing plate 11 is fixed to its free end side. Further, the tip of a piston rod of a cylinder 19 rotatably supported on the bed 4 is connected to the vicinity of the bent portion of the support member 18.

As a result, the backing plate 11 is moved by the driving force of the cylinder 19 to the fulcrum 18a between the facing position facing the front surface of the nozzle 2 of the heating cylinder 3 in the retracted position and the detached position where it does not come into contact with the nozzle 2 or the heating cylinder 3.
During purging, the nozzle 2 can be rotated to a facing position facing the front surface of the nozzle 2 which is in the retracted position, and during injection, it can be rotated to the detached position.

A funnel-shaped upper gutter 12 is disposed below the backing plate 11 when the backing plate 11 is rotated and is in a position facing the front surface of the nozzle 2 which is in the retracted position. A pair of stepped interlocking rollers 1 each of which is water-cooled and arranged in two stages in sequence.
3 and a pair of interlocking rollers 14 are provided.

The meshing roller 14 is a stepped meshing roller 1.
3, a lower gutter 15 that slopes downward is disposed below the engaging roller 14, and a saucer 16 is provided below the lower gutter 15. is located.

In addition, the surfaces of the patch plate 11, the upper gutter 12, the lower gutter 15, the pair of stepped interlocking rollers 13, and the pair of interlocking rollers 14 in this embodiment are coated with tetrafluoroethylene resin to prevent the purge material from adhering. is applied.

Next, the operation of this embodiment will be explained.

After the injection molding operation is completed, the heating cylinder 3 is moved to the retracted position. Thereafter, the backing plate 11 is rotated via the support member 18 by the driving force of the cylinder 19 to a position facing the front surface of the nozzle 2 .

Then, when the nozzle 2 is purged, the purged material collides with the backing plate 11 as shown by arrow P and falls into the funnel-shaped upper gutter 12. The purge material P' that has fallen into the upper gutter 12 is guided by the upper gutter 12 to the water-cooled stepped meshing rollers 13, where it is formed into a plate-shaped body with cuts, cooled, and then cooled. It is further cooled by a water-cooled meshing roller 14 that rotates at a higher speed than the meshing roller 13, and is torn and cut into small pieces 17.

The cut pieces 17 are guided to the lower gutter 15 and stored in the tray 16. By filling the saucer 16 with cooling water, the cut pieces 17 can be further cooled.

[Effect of idea]

Since the present invention is constructed as described above, it produces the following effects.

The purged purge material does not scatter onto the fixed platen or bed, and is automatically cut into small pieces and guided outside the machine, so there is no need to interrupt work to process the purge material, increasing productivity. In addition to this, it becomes possible to reduce the cost of recycling the purge material.

[Brief explanation of drawings]

Fig. 1 is a schematic front view of an embodiment of the automatic purging material processing device for an injection molding machine of the present invention, Fig. 2 is a schematic side view seen from the direction of the arrow in Fig. FIG. 4 is a schematic side view showing a state in which the device has been rotated from the state shown in FIG. 2 to the detached position, and FIG. 1...Fixed plate, 2...Nozzle, 3...Heating tube,
4...Bed, 10...Purge material automatic processing device,
11... Backing plate, 12... Upper gutter, 13... Stepped engaging roller, 14... Engaging roller, 15
...Gutter, 16...Saucer, 17...Small piece, 18...
...Supporting member, 19...Cylinder.

Claims (1)

[Scope of Claim for Utility Model Registration] A backing plate that is rotatable between a facing position facing the front surface of a nozzle of a heating cylinder in a retracted position of an injection molding machine and a detached position separated from the facing position, and the facing plate. a funnel-shaped upper gutter that is disposed below the caul plate in the position and guides the purge material that is purged from the nozzle and falls upon colliding with the caul plate; a pair of stepped interlocking rollers and a pair of interlocking rollers, each of which is water-cooled, and a downwardly sloping lower gutter disposed below the interlocking roller; The surfaces of the roller, the pair of meshing rollers, and the lower gutter are each coated with a tetrafluoroethylene resin, and the pair of meshing rollers are configured to rotate at a higher speed than the pair of stepped meshing rollers. Automatic purge material processing equipment for injection molding machines.