JP2000218658A - Runner take-out device for injection molding equipment - Google Patents

Abstract

(57) [Problem] To solve the problem, according to the present invention, after injection molding, a runner is easily removed from a lock pin so that no residue remains on a lock portion.
The purpose is to enable automatic driving. A runner take-out device of an injection molding device, which is a coupling structure of a protrusion pin and a runner, wherein the runner is detached by moving the runner in a radial direction from the protrusion pin.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention allows a runner to be pulled out of a fixed side together with an ejection pin when the mold is opened, the runner to be ejected from the mold by the ejection pin, and the runner to be reliably removed from the ejection pin by a robot. The present invention relates to a runner take-out device for an injection molding device.

[0002]

2. Description of the Related Art After the end of injection molding, it is necessary to pull out the spool so that it does not remain on the fixed side when the mold is opened, then push out the sprue from the mold with a projection pin, and grip and remove the runner with a robot. A conventional runner take-out device will be described with reference to FIGS. 1
Reference numeral 0 denotes a protruding pin, which is formed at its upper end with an annular groove 11 whose outer periphery becomes deeper in the radial direction as going downward, and forms an inverted conical lock pin 12, which locks the entire lower end of the runner 13 with the lock pin 12. Was.

[0003]

The prior art described above has a problem in that the entire periphery of the lower end of the runner 13 is locked, so that it is difficult to come off, and a scum appears in the lock portion for each shot, so that fully automatic operation cannot be performed. there were.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and a connecting structure of a protruding pin and a runner, wherein the runner is detached by moving the runner radially from the protruding pin. It is characterized by having done.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail based on one embodiment shown in FIGS. Reference numeral 1 denotes a protruding pin, which is provided with a lock pin 3 formed in parallel on opposite sides of an upper end of the wedge-shaped tapered surface 2, 2 which gradually becomes deeper as going downward. Reference numeral 4 denotes a sprue at the lower end of the runner 5.

Next, the operation will be described. The injection molding is completed, and the movable mold is lowered. At this time, the lock pin 3 is integrated with the movable side mold by the wedge-shaped tapered surfaces 2 and 2 so that the upper end of the runner is not taken on the fixed side mold by the burr of the nozzle touch. Next, after the mold is completely opened, the runner 5 is taken out by a take-out machine along the radial direction AA of the lock pin 3.
At this time, since it is not locked in the take-out direction, the take-out can be performed smoothly.

FIGS. 5 to 8 show a second embodiment of the present invention. Parallel grooves 11, 11 on both sides near the upper end of the protruding pin 10.
Is formed.

FIG. 9 shows a third embodiment of the present invention.
1 are formed. The operation is the same as in the first embodiment. In the above example, similar parallel surfaces are formed at line-symmetric positions, but one side may be a tapered surface and the other side may be a curved surface. Further, the parallel surface or the curved surface is also tapered with respect to the radial direction of the protruding pin, or
It may be stepped. Although the runner can be detached from only one direction, it is an effective means when, for example, the runner does not want to drop and is detached from the upper side.

[0009]

According to the present invention, there is provided a coupling structure between a projecting pin and a runner, wherein the runner is detached by moving the runner in a radial direction from the projecting pin. In this state, the runner can be pulled away from the fixed side, and the runner can be pulled out along the parallel surfaces on both sides of the lock pin, so that the runner can be pulled out without difficulty.

[Brief description of the drawings]

FIG. 1 is a front sectional view of a runner and a lock pin engaging portion at the end of injection in one embodiment of the present invention.

FIG. 2 is a side sectional view of FIG.

FIG. 3 is an external perspective view of a lock pin unit of FIG. 1;

FIG. 4 is an external perspective view of a sprue portion of the lock pin engaging portion of FIG.

FIG. 5 is an external perspective view of an upper portion of a lock pin according to a second embodiment of the present invention.

6 is a sectional view taken along line AA of FIG.

FIG. 7 is a side view of FIG. 6;

FIG. 8 is a top view of FIG. 6;

FIG. 9 is an external perspective view of an upper part of a lock pin according to a third embodiment of the present invention.

FIG. 10 is a front sectional view of a conventional apparatus at the time of injection molding.

FIG. 11 is an external perspective view of a lock pin portion of FIG. 10;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Protruding pin 2 Parallel wedge-shaped tapered surface on both sides of lock pin 3 Lock pin 4 Sprue 11 Parallel groove 21 Parallel curved surface

Claims (1)

[Claims] 1. A runner take-out device for an injection molding device, wherein the runner is detached by moving the runner radially from the protrusion pin.