JPH1016012A - Apparatus for taking out runner of injection molding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the easy removal of a runner from an ejection pin when a mold is opened by forming a projection part above a runner and forming radially an elastic octopus-leg-shaped grip part at the lower end of the projection part opposite to the ejection pin below the projection part and a fixing channel of a specified shape which fixes the grip part at the upper end of the ejection pin. SOLUTION: A projection part 4a by a robot 6 is formed above a runner 4, and an elastic octopus-leg-shaped grip part 7 is formed radially in the center direction opposite to an ejection pin 5 at the lower end of a projection part 4b below the part 4a. A fixing channel 8 for fixing the grip part 7 the depth of which increases gradually downward in the center direction is formed radially at the upper end of the ejection pin 5. After the completion of injection molding, the runner 4 is extracted from a fixed side mold 1. Next, after the mold being completely opened, the grip part 7 in which the ejection pin 5 is projected is projected from a movable side mold. Next, when the projection part above the runner 4 is gripped and pulled upward, the grip part 7 is separated from the ejection pin 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of pulling out a runner from a fixed side together with a projecting pin when the mold is opened, projecting the runner from the mold with the projecting pin, and pulling the runner upward with a robot to securely remove the runner from the projecting pin. The present invention relates to a runner take-out device for an injection molding device capable of performing the following.

[0002]

2. Description of the Related Art After the end of injection molding, when the mold is opened, it is necessary to pull out the spool so that it does not remain on the fixed side, then push out the spool from the mold with a projecting pin, and grasp and remove the runner with a robot. Conventionally, as shown in FIG. 6, when the upper end 10a of the protruding pin 10 is flat, the runner 11 is blurred and tilted when protruding. Therefore, it has been considered to form a Z-shaped lock portion 20a at the upper end of the protruding pin 20, as shown in FIG.

[0003]

However, in the above-mentioned conventional example, the former has a problem that the protruding runner 11 is inclined, so that it cannot be gripped by the robot finger 12.
The latter has a problem that the lock portion 20a is difficult to come off.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide a projecting portion above a runner,
A protruding portion is formed below the protruding pin so as to face the protruding pin, and an octopus-shaped grip portion having elasticity in the center axis direction is radially formed at the lower end of the protruding portion, and the upper end of the protruding pin is moved toward the center as it goes downward. A locking groove for locking the octopus-shaped grip portion, which gradually becomes deeper, is formed radially.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in detail with reference to the illustrated embodiments. 1 is a fixed mold, 2 is a movable mold, 3 is a nozzle of a molding machine, 4 is a runner, and 5 is a protruding pin. A protrusion 4a (in this example, a sprue formed by a center injection molding method) is protruded above the runner 4 by a robot 6, and a lower end of the protrusion 4b is opposed to the protruding pin 5 and has elasticity in the center direction. The octopus-shaped grip 7 is formed radially, and a locking groove 8 for locking the octopus-shaped grip 7, which is gradually deeper toward the center as it goes downward, is formed radially at the upper end of the protruding pin 5.

Next, the operation will be described. When the injection molding is completed as shown in FIG. 1, the nozzle 3 of the molding machine moves upward and separates from the upper protrusion 4a of the runner 4, as shown in FIG. Next, the movable mold 2 is lowered. At this time, since the locking groove 10 at the upper end of the protruding pin 5 and the octopus-shaped grip at the lower end of the projection 4b below the runner 4 are integrally engaged in the movable mold 2, the runner 4 is moved from the fixed mold 1. Remove as shown in FIG. Next, after the mold is completely opened, the foot-shaped gripping portion 9 from which the ejection pin 5 has been projected as shown in FIG.
Next, as shown in FIG. 5, when the upper protrusion 4 a of the runner 4 is gripped by the robot 6 and pulled upward, the octopus-shaped grip 9 is opened outward without difficulty and detaches from the protruding pin 5. In this example, the projection 4a is a sprue, but a projection formed by a parting injection molding method may be a projection corresponding to the projection 4a.

[0007]

According to the present invention, a projecting portion is formed above the runner, and a projecting portion is formed below the projecting portion so as to face the projecting pin. The grip portion is formed radially, and at the upper end of the protruding pin, a locking groove for locking the octopus-shaped grip portion, which gradually deepens toward the center as it goes downward, is formed radially, so that when the mold is opened, the spool is opened. When the spool is protruded from the movable mold, the runner does not deviate from the protruding pin, and the runner can be easily removed from the protruding pin by pulling the runner with the gripping part of the robot.

[Brief description of the drawings]

FIG. 1 is a front sectional view of an embodiment of the present invention when injection is completed.

FIG. 2 is a front sectional view of the molding machine nozzle of FIG. 1 when it is retracted.

FIG. 3 is a front sectional view at the start of opening the movable side mold of FIG. 2;

FIG. 4 is a front sectional view when the runner is protruded with a protruding pin after the mold opening of FIG. 3 is completed.

FIG. 5 is a front sectional view when the runner of FIG. 4 is gripped by a robot, pulled, and removed from a protruding pin.

FIG. 6 is a front cross-sectional view of a first comparative example of the related art when a runner is protruded with a protruding pin.

FIG. 7 is a front sectional view when a runner is protruded by a protruding pin in a second comparative example of the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fixed side mold 2 Movable side mold 3 Nozzle of molding machine 4 Runner 4a Runner upper projection (sprue) 4b Runner lower projection 5 Protruding pin 6 Robot 7 Octopus shaped gripping section 8 Octopus shaped gripping section locking groove

Claims (1)

[Claims] 1. A protrusion is formed above a runner, and a protrusion is formed below the protrusion so as to face a protruding pin. A runner take-out device for an injection molding device, wherein a locking groove for locking the octopus-shaped grip portion is formed at an upper end of the protruding pin and gradually deepens toward the center as it goes downward.