JPH0340581Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field to which the invention pertains] The present invention relates to a purge receiving device for an injection molding machine or the like.

Prevents purged molten resin from scattering near the resin injection port of the mold when purging to change raw materials or change colors in injection molding machines and extrusion machines (the injection molding machine will be explained as an example below). A purge receiver is provided for this purpose.

[Prior art] An example of a conventional purge receiving device is shown in FIGS. 4 and 5.
Let's explain with a diagram. The heating cylinder 52 with the nozzle 51 attached to the tip is placed in the retracted position, and the nozzle touch hole 54 of the fixed die plate 53 is connected to the nozzle 51 and the cavity of the fixed die (not shown) fixed to the fixed die plate 53. A cylinder 5 installed vertically or vertically on the line connecting the
Purge receiver 57 fixed to piston rod 56 of 5
was installed, and a resin receiving box 58 was placed on a frame 59 below it.

In this state, when purging is performed and a certain amount of purged molten resin accumulates in the resin receiving box, an operator discharges it to the vicinity of the injection molding machine and removes the resin receiving box 58 from the frame 59. Purging is also possible with this method, but with recent strong demands for automation and labor saving, automation of the purge operation itself is progressing; Complete automation was not achieved as there was still work to be done by the operator.

It has been pointed out that another drawback is that the purge receiver is repeatedly injected with high-temperature molten resin and becomes hot, so molten resin adheres to the purge receiver and it takes time to remove it, and automation is not possible. Ta.

[Purpose of the invention] The present invention was made from this point of view, and its purpose is to reduce the purging process by placing the resin receiving box containing the purged molten resin on the floor instead of on the frame of the injection molding machine. The object of the present invention is to provide a purge receiving device for an injection molding machine, etc., which is completely automated.

Another object of the present invention is to provide a purge receiver device for an injection molding machine that prevents molten resin from adhering to the purge receiver by cooling the purge receiver.

[Key Points of the Invention] The purge receiver device of the injection molding machine in the present invention is as follows:
In a purge receiving device of an injection molding machine that receives molten resin discharged from the nozzle between the anti-mold mounting surface of the fixed die plate of the horizontal injection molding machine and the nozzle of the injection cylinder installed horizontally, A window is placed near the opposite mold mounting surface of the die plate and receives the purge resin in front of the nozzle.
There is a box-shaped purge receiver with a hole for discharging the purge resin on the side, a nozzle for blowing cooling air on the opposite side of the discharge hole, and a box-shaped purge receiver with a hole fixed to the bottom near the discharge hole of the purge receiver. A support mechanism that rotatably supports the purge receiver using a connecting block and a pin provided on a bracket attached to the opposite die mounting surface of the fixed die plate, and a support mechanism that is fixed to the lower surface of the purge receiver opposite to the discharge hole. A pneumatic or hydraulic cylinder with a swinging mechanism is installed on the connecting block and the opposite mold mounting surface of the fixed die plate, and the molten resin purged from the nozzle is discharged with the rod of the cylinder moving forward and the purge receiver tilted. A discharge duct that discharges to the outside of the machine,
It is characterized by consisting of a resin receiving box installed on the floor.

[Embodiment of the invention] Hereinafter, a description will be given of FIGS. 1 to 3 showing an embodiment of the invention. A bracket 11 is fixed to the opposite die mounting surface of a stationary die plate (not shown), and a purge receiver 12 is supported by a pin 14 via a connecting block 13 fixed to one end of the bracket 11. Pin 15 is on the anti-mold mounting surface mentioned above.
The bracket 17 to which the purge receiving swing cylinder 16 is rotatably attached is fixed, and the tip of the piston rod 18 of the cylinder 16 is attached to the purge receiving swing cylinder 12.
Pin 2 to connecting block 19 fixed near the other end.
Connected via 0. Therefore, the purge receiver 12
The purge receiving swing cylinder 16 swings around the pin 14 to the positions shown in FIGS. 1 and 2.

As shown in FIG. 3, the purge receiver 12 has a receiving plate 26 and side plates 27 and 2 which are in contact with the purged molten resin.
It consists of two partition plates 28 and a front plate 29, and the lower part of the side plate 27 in FIG. 1 serves as a chute portion 27A through which the purged resin moves. The side plate 27 also has an air blowing nozzle 30 on the right side in FIG.
The nozzle 30 is connected from a flexible hose 31 to a relay 32 fixed to the bracket 17.
is connected to a compressed air source 33 through. Further, the front plate 29 is formed with a window 29A that faces a nozzle of a heating cylinder of an injection molding machine (not shown) when the purge receiver 12 is in the position shown in FIG.

A discharge duct 36 opens near one end of the purge receiver 12 and guides the resin from the purge receiver 12 to a resin receiver box 37 placed on the floor below. Reference numeral 38 indicated by a dashed line is a nozzle touch hole formed in the fixed die plate.

Next, the operation of the embodiment described above will be explained. Since the purge receiver 12 is in the position shown in FIG. 1 during molding of a molded product, it does not interfere with the injection cylinder. When a predetermined amount of molding is completed and purging is to be performed, the injection cylinder is first moved backward, and then the purge receiver 12 is placed in the position shown in FIG. 2 by the purge receiver swing cylinder 16 moving forward. In this state, the window 29A of the purge receiver 12 faces the nozzle of the heating cylinder, so the purged molten resin (not shown) flows out from the tip of the nozzle and collides with the receiver plate 26. At this time, since cooling air is ejected from the nozzle 30 and the molten resin is cooled, it does not adhere to the receiving plate 26 or the like. The cooled resin flows down the chute portion 27A, is guided to the discharge duct 36, and enters the resin receiving box 37.

In addition to the above-mentioned air nozzle 30 for cooling the purged molten resin, a purge receiver 12 is also provided.
It is more effective to attach a cooling water jacket (not shown) to the back side of the tube.

[Effect of the invention] As explained above, the purge receiver of the present invention for injection molding machines, etc. is provided with a swingable purge receiver that is always open on the extension of the nozzle tip but is blocked during purging. . Therefore, the molten resin flowing out from the nozzle tip during purging comes into contact with the purge receiver, falls under its own weight, and enters the resin receiver box placed on the floor, making it possible to automate purging. Further, since the purge receiver is provided with a cooling air nozzle, there is an advantage that resin does not adhere to the purge receiver.

[Brief explanation of the drawing]

Figures 1 to 3 show one embodiment of the present invention; Figures 1 and 2 are front views at different times;
The figure is a cross-sectional view of the purge receiver, and Figures 4 and 5 show conventional examples. Figure 4 is a partially sectional side view, and Figure 5
The figure is a front view. 11...Bracket, 12...Purge receiver, 16
...Purge receiving swing cylinder, 18...Piston rod, 36...Discharge duct, 37...Resin receiving box.

Claims (1)

[Scope of claim for utility model registration] Injection molding in which molten resin discharged from the nozzle is received between the anti-mold mounting surface of a fixed die plate of a horizontal injection molding machine and the nozzle of an injection cylinder installed horizontally. In the purge receiving device of the machine, a window is placed near the opposite mold mounting surface of the fixed die plate and receives the purge resin in front of the nozzle.
A box-shaped purge receiver with a hole for discharging the purge resin on the side and a nozzle for blowing cooling air on the opposite side of the discharge hole, and a box-shaped purge receiver fixed under the vicinity of the discharge hole of the purge receiver. A support mechanism that rotatably supports the purge receiver using a connecting block and a pin provided on a bracket attached to the opposite mold mounting surface of the fixed die plate, and a support mechanism that is fixed to the lower surface of the purge receiver opposite to the discharge hole. A pneumatic or hydraulic cylinder with a swinging mechanism is installed on the connecting block and the fixed die plate opposite to the mold mounting surface, and when the rod of the cylinder moves forward and the purge receiver is tilted, the melt purged from the nozzle is removed. A purge receiver device for an injection molding machine that consists of a discharge duct that discharges resin outside the machine and a resin receiver box installed on the floor.