JP2513246Y2 - Purging resin processing equipment - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a purging resin processing device used for performing resin changing and color changing operations of an injection molding machine and an extrusion molding machine.

[0002]

2. Description of the Related Art Purging of a previously used resin is carried out when a raw material resin is replaced or a color is changed in an injection molding machine or the like. In other words, it is necessary to feed the newly replaced resin into the heating cylinder, repeat the rotation and injection, and purging the accumulated portion of the old resin.

The molten resin extruded by this purging is discharged into the air from the injection nozzle, and is received by the receiving tray to be removed by the operator. In order to save labor and improve the efficiency of this work,
The one described in Japanese Patent Publication No. 1 has been proposed. That is, as shown in FIGS. 3 and 4, the chute 1 for receiving the molten resin extruded into the air from the nozzle 14 of the injection molding machine is rotatably attached, and the high pressure air branch block 7 is attached to the chute 1. High-pressure air is blown out from a nozzle attached to the purging molten resin 16 while being cooled, and dropped into a predetermined receiving box 10.

[0004]

A so-called dripping resin adheres from the nozzle of an injection molding machine or an extruder around the tip of the nozzle, and solidifies and adheres between the nozzle and the mold inlet during the next injection extrusion. However, problems such as resin leakage may occur. Since the purging resin discharge chute device shown in FIGS. 3 and 4 of the prior art is placed in the vicinity of the mold spool,
When it was necessary to unclog the mold spool, there were problems such as hindering work.

The present invention has been proposed to solve the above conventional problems.

[0006]

Therefore, according to the present invention, a chute for receiving a molten resin for purging extruded into the air from a nozzle of an injection molding machine or an extrusion molding machine is movably attached, and the molten resin for purging is predetermined. In the purging resin processing device for discharging to the location, the chute end is arranged so as to be close to the nozzle tip during movement, and by moving the chute,
The end of the chute scrapes the tip of the nozzle and scrapes off the nose-like molten resin for purging.
This is a means for solving the problem.

[0007]

Function: The chute made of purging resin is actuated by the actuator to retract the chute upward except when purging, and the chute is pulled down when the nozzle of the injection molding machine retracts during purging work. The purging resin extruded from the injection nozzle is blown down along the chute while being cooled by the air blown from the air nozzle, and is received by the receiving box under the chute. When purging is completed and the chute is pulled up, the notch edge of the chute scrapes the exit of the injection nozzle and scrapes off the resin remaining at the tip of the nozzle. The scraped resin also flows down on the chute together with the purged resin.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments of the drawings. FIGS. 1 and 2 show an embodiment of a purging resin discharging device in an injection molding machine of the present invention. In the figure, 2 is a die head, 13 is an injection unit, 14 is an injection nozzle, and 20 is a base of an injection molding machine on which these are mounted. 21 is a chute for discharging the purging resin 16, which is the chute 2
A high-pressure air branch pipe 22 is attached to the upper side of 1. The branch pipe 22 has a plurality of air nozzles 23,
Is arranged along the slope of the chute 21 while cooling the purging resin 16 extruded from the injection nozzle 14 while cooling down the purging resin 16. The chute 21 is supported by the pins 25 (two pieces) on both sides on a support base 24 attached to the base 20.
It is attached so that it can rotate freely around the.

Reference numeral 26 is a pneumatic cylinder for driving the chute 21, and one end of the cylinder 26 is rotatably supported by a pin by an abutment 27 attached to the base 20. The rod end of the other end of the cylinder 26 is
It is connected to a support fitting 28 fixed to the chute 21 by a pin. The position of the injection unit 13 in FIG. 1 is at the purging position away from the die head 2. At this position, when the chute 21 moves up and down as shown by the arrow in FIG.
It is set so that the tip of the grab will be slightly grazed. 29 is a high pressure air branch pipe 22 and an air nozzle 23
A flexible hose 10 for sending air to the is a receiving box for the discharged purging resin.

Next, the operation will be described. First, the purging will be described. The injection unit is fixed at the position where the purging is performed (the position shown in FIG. 1) and the rotation and the injection of the injection screw are repeated using the new resin, and the old resin is discharged from the nozzle 14 to the chute 21. Extrude up. The chute 21 is in the lowered position (solid line in FIG. 2, position in FIG. 1 ) , and air is blown from the air nozzle 23 while the resin in the nozzle 14 is being extruded, and the chute 21 is cooled while cooling the purging resin 16. Blow down along 21. Resin 16
Are dropped from the chute 21 and stored in the receiving box 10.

Explaining the pulling up of the chute and the scraping of the nose of the resin, the pneumatic cylinder 26 is operated and the cylinder rod is actuated when the purging of the old resin is completed and the injection of the molten resin from the injection unit 13 is stopped. Is pulled, and the chute 21 rotates upward. Shoot 2
While the 1 is moving upward, the notch edge 21a of the chute 21 grabs the tip of the injection nozzle 14 smoothly.
At that time, the resin remaining from the tip of the nozzle 14, so-called nasal drool, is cut and further raised and stopped.

The upper limit stop position of the chute 21 is indicated by 2 in FIG.
It is shown by a two-dot chain line of 1 '. If the injection unit 13 is retracted to this position, the chute 21 and the injection unit 13 do not come into contact with each other even when the injection unit 13 advances in the direction of the mold and enters the operation. Although the embodiments of FIGS. 1 and 2 have been described with respect to a chute that performs a turning operation, the present invention is also applicable to a chute that moves vertically or horizontally.

[0013]

As described above in detail, according to the present invention, when the purging resin chute is pulled up by operating the actuator, the chute device is on the side opposite to the operating side.
The area near the resin inlet of the mold is fully opened, making it easy to remove the resin clogged in the mold spool. Further, by using an actuator for driving the chute and a solenoid valve for controlling the resin blowing air, it is possible to automate the resin purging.

[Brief description of drawings]

FIG. 1 is a perspective view showing the vicinity of an injection nozzle according to an embodiment of the present invention.

FIG. 2 is a front view for explaining the movement of the chute in FIG.

FIG. 3 is a side sectional view of a conventional purging resin processing device.

FIG. 4 is a front view of the apparatus of FIG. 3;

[Explanation of symbols]

 13 Injection Unit 14 Resin Nozzle 16 Purging Resin 21 Chute 21a Chute Notch Edge 23 Air Nozzle 24 Support 25 Pin 26 Pneumatic Cylinder

Claims (1)

(57) [Scope of utility model registration request] 1. A purging resin in which a chute for receiving a molten resin for purging extruded into the air from a nozzle of an injection molding machine or an extrusion molding machine is movably attached, and the molten resin for purging is discharged to a predetermined location. In the processing device, the end of the chute is arranged so as to be close to the tip of the nozzle during movement, and by moving the chute, the end of the chute grabs the tip of the nozzle and melts for nose-like purging. A purging resin processing device characterized in that the resin is scraped off.