KR920004586Y1 - Ejecting device for injection molding article - Google Patents

Abstract

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Description

Molded product ejection device for plastic injection mold

1 is a longitudinal cross-sectional view of a molded article ejecting device of a conventional plastic injection mold, in which a boss portion or the like is included in an inner bottle of a molded article.

FIG. 2 is a longitudinal sectional view different from the example of FIG. 1 of a molded article ejecting device of a conventional plastic injection mold. FIG.

3 is a partial longitudinal cross-sectional view of a molded article ejecting device of a conventional plastic injection mold used when there is a boss or the like on the outer wall of the molded article.

Figure 4 is a partial longitudinal cross-sectional view showing an embodiment of a molded article extraction device of a plastic injection mold of the present invention, a closed state.

Figure 5 is a partial longitudinal cross-sectional view showing an embodiment of the present invention shown in the fourth road in the open state.

6A and 6B are cross-sectional views taken along lines A-A and B-B of FIG.

* Explanation of symbols for main parts of the drawings

5: Senate 6: House of Representatives

7: fixed core 8: slider core

9: horizontal groove 10: vertical hole

11: space part 12: movable core

13: vertical connecting rod 14: operating rod

15: coater rod 16: operating rod

The present invention relates to a device for ejecting a molded article of a plastic injection mold, and in particular, a plastic injection mold that can automatically eject a protrusion, a boss or a rib at the same time inside and outside of one side wall of the plastic molded article. It relates to a molded article extraction device of.

As shown in FIG. 1, the conventional plastic injection mold has an upper plate and a lower plate 23 when there are ribs or bosses 22 protruding into one side wall 21 of the box-shaped plastic molded article 20. As shown in FIG. The core block 25 is divided into two, and the core block on one side is fixed core 25a, and the core block on the other side is composed of movable cores 26b which are moved up and down. After the injection of 20), the movable core 25a is moved upward by the ejector pin 26 together with the molded product 20, and the molded product 20 is moved in the direction of arrow A in FIG. The molded article 20 has been ejected by pushing it with a human hand.

In addition, the plastic injection mold shown in FIG. 2 is a mold more advanced than the mold of FIG. 1 and has a box having ribs on the upper wall and the boss portion 29 on the inner side of the side wall between the upper and lower plates 27 and 28. When injecting the molded article 3 of the mold, the core is divided into the fixed core 31 and the movable core 32, and the surfaces in contact with each other are formed of the inclined surfaces 31 'and 32' to form the molded article 30. After the molding is finished, the movable core 32 is raised along with the molded article 30 injected and molded by the eject pin 26 and the slanted surfaces 31 'and 32' are brought into contact with each other. 2 is moved to the left to move the core 32 from the boss portion 29 is configured to eject the molded article 30.

Next, FIG. 3 is a filed application (application number 87-11195) of the present application, where a hole 35 (in the figure, a boss part, etc.) is laid out on one side wall 34 of the molded article 33. The slide core 38 is provided between the upper and lower plates 36 and 37 on the outside of the molded article 33, and the movement of the slide core 38 to the left and right sides (in the drawing) is described above. The coder 39 is fixed to the upper plate 36, and the inclined surfaces 39a and 39b are formed parallel to the coder 39, and the upper surface of the slide core 38 corresponds to the coder 39. Edo insertion grooves 40 are formed, but also left and right inclined surfaces 39a and 39b of the coater 39 are formed at the same angle as the left and right inclined surfaces 40a and 40b. When the lower plates 36 and 37 are closed, the coater 39 is inserted into the insertion groove 40 and the left inclined surface 39a of the coder 39 and the left diameter of the insertion groove 40 are closed. As the slope 40a contacts and slides, the slide core 38 is moved to the left side in the drawing to be in an injection state, whereby injection is started to form the molded article 33.

Next, when the injection is finished and the cooled and molded molded article 33 is taken out, the upper plate 36 is raised so that the fixed coder 39 is also raised so that the right inclined surface 39b of the coder 39 is raised. The slide core 40 is moved to the right in the drawing while being in contact with the right inclined surface 40b of the insertion groove 40 of the slide core 38 and moved to the right in the drawing. 35).

At this time, the molded article 33 is extracted by the eject pin 26.

The above-mentioned conventional plastic injection molding device ejection apparatus of the mold is convenient to use only when the boss portion, holes, ribs, etc. are formed only inside or outside one sidewall of the molded article.

However, when bosses, ribs, and the like are formed at both sides of one side wall of the plastic molded article, that is, inside and outside at the same time, the above-described conventional extracting device cannot be used at all.

Accordingly, an object of the present invention is to provide a plastic injection mold configured to automatically eject molded products when the mold is expanded, even when bosses, ribs, and holes are simultaneously formed inside and outside one side wall of the plastic molded product. It is to provide a molded article ejection device.

In order to achieve the object of the present invention as described above, the molded article ejection apparatus of the plastic injection mold of the present invention is composed of upper and lower disks to arrange a fixed core and a slide core therebetween, and the inclined coater on the upper disk. In forming the operating hole in the slide core corresponding to the rod and the corresponding, the one side of the fixed core and the vertical hole in communication with the horizontal groove and the lower portion of the lower plate formed in the lower portion of the lower plate and sequentially Insert the movable core, the vertical connecting rod and the actuating rod into perturbation, contact it with an inclined surface, and at the same time, engage even the stumbling block with the catching element, and fix one side of the actuating rod to the slide core to interlock with it. Thus, the movable core is configured to move from side to side.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

4 is a state in which the mold according to the present invention is closed, and a boss portion 3 having a hole outward on one side wall 2 of the plastic molding foam 1 and a protrusion 4 formed therein. It is.

In the plastic injection mold, a stationary core 7 and a slide core 8 are provided between the upper and lower plates 5 and 6.

One side of the fixed core 7 is formed with a horizontal groove 9 in a portion corresponding to the protruding portion 4 inwardly of the molded article 1, and also vertical holes to communicate with the horizontal groove 9 (10) is laid down and opened to the bottom surface of the fixed core (7), and a step portion (11 ') is formed on the upper surface of the lower plate (6) directly above the vertical hole (10) to form a space portion (11). ).

The movable groove 12, the vertical connecting rod 13, and the operating rod 14 are sequentially inserted into the horizontal groove 9, the vertical hole 10, and the space 11 so as to perturb sequentially. The inclined surface 12 ', 13', 13 ", 14 'is formed in the site, and the locking yoke 12a, 13b and the locking protrusion 13a, 14a are formed on the inclined surface, so that the perturbation is freely combined. In order to assemble them, the fixed core 7 can be properly divided.

Meanwhile, one side of the operating rod 14 is fixed to the bottom of the slide core 8 with a fixing bolt 8 ', and the cotter rod 15 is inclined at a predetermined angle on the bottom of the upper plate 5. It is inserted and fixed, and the operation hole 16 is formed to be inclined at the same angle as the cotter rod 15 and correspondingly. In addition, the horizontal distance S corresponding to the inclination of the coater rod 15 is the left and right moving distance of the slide core 8. 17 is an ejecton pin.

Referring to the operation of the present embodiment configured as described above are as follows.

As shown in FIG. 5, when plastic injection is started in the state where the upper and lower plates 5 and 6 of the mold are opened, and the upper and lower plates 5 and 6 are moved downward, the coater rod is preferentially The tip end portion 15 is inserted into the operating hole 16 and slides in close contact with the left inclined surface of the operating hole 16 so that the slide core 8 moves to the left by S to come to the injection position.

On the other hand, by the movement to the left side of the slide core 8 described above, the operating rod 14 fixed to the lower side thereof is also moved by S to the left. An inclined surface 14 'is formed at the tip of the left side of the operating rod 14, and the lower end of the vertical connecting rod 13 is also formed with an inclined surface 13 "at the same time as the inclined surface 14'. It is coupled to the locking protrusion 14a and the locking yoke 13b so as to perturb, and the vertical connecting rod 13 is moved upward by riding the inclined surface 14 '.

An inclined surface 13 'is also formed at the upper end of the vertical connecting rod 13, and the movable core 12 having the inclined surface 12' freely formed with a perturbation material 13a and a locking yoke 12a is used as a perturbation material. In combination, the movable core 12 moves to the right as the vertical connecting rod 13 moves upward, so that the movable core 12 also comes to the injection position.

As a result, the injection is started, the injection is finished, the cooling is completed, and when the molding is completed, the upper plate 5 is raised in the reverse order as described above, so that the inclined surface on the right side of the coater rod 15 is the right side of the operation hole 16. The slide rod 8 is moved to the right while being in contact with sliding, so that the tip of the slide core 8 is separated from the boss portion 3 of the molded part 1, and at the same time, the operating rod 14 fixed to the slide core 8 is fixed. ) Is also moved to the right side by perturbation with the inclined surface 13 "of the vertical connecting rod 13 which is in contact with the inclined surface 14 ', and by the engagement of the locking protrusion 14a and the locking relief 13b respectively formed therebetween. The vertical connecting rod 13 is moved downward, and according to the downward movement of the vertical connecting rod 13, the front end portion of the movable core 12, which is also in contact with the inclined surface 13 'thereof, has a protrusion 4 of the molded article 1. ) To the two sides of one side star (2) of the molded article (1) The boss part 3 and the projection part 4 which are formed in each of them are in a state where they can be pulled out from the fixed core 7 and the slide core 8, and at this time, the molded product 1 is separated by the rise of the etch pin 17. It is taken out.

The present invention is illustrated and described in the upper and lower for the purpose of description, it can also be used to install it in the transverse direction.

Therefore, according to the present invention, even when bosses, holes, ribs, etc. are formed inside and outside of one side wall of the plastic molded article, the molded article can be automatically taken out when the mold is opened.

As a result, the manufacturing cycle time of the molded article is shortened and the molded article is automatically taken out, so that one person can take care of several plastic molding machines, resulting in a reduction in labor costs. It can also be installed in a plurality of molded articles at the same time can be taken out.

Claims (1)

The upper and lower plates (5) and (6) are configured to provide a fixed core (7) and a slide core (8) therebetween. The upper plate (5) is inclined to the cotter rod (15) and the corresponding ones. In the operation of forming the operating hole 16 in the slide core (8), the horizontal groove (9) and the vertical hole (10) in communication with one side of the fixed core (7) and the lower portion directly The space 11 is formed on the lower farm 6, and the movable core 12, the vertical connecting rod 13, and the operating rod 14 are inserted into the perturbation in sequence, and the Shangho slopes 12 are interposed therebetween. ') (13') (13 '') (14 ') and at the same time the locking protrusion 13a, 14a and the locking yoke (12a) (13a) is coupled to the perturbation, the operating rod (14) Fixing one side of the slad core (8) is fixed to the molded article ejection device of a plastic injection mold, characterized in that configured to move in conjunction with this movable core (12) from side to side.