JPS6222345Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a molded product ejecting device for an injection molding machine, and in particular, a guide plate is slidably fitted onto a movable mold, and an intermediate plate is slidably fitted onto the guide plate. This relates to a molded product ejecting device for an injection molding machine, which is held in the intermediate plate, has an opening for forming a die carving space, and has a protruding pin outside the fixed mold and movable mold system. .

In injection molding of synthetic resins, in recent years there has been a great demand for automation of the removal of molded products in order to streamline operations.

Conventionally, in order to take out the molded product from the mold, the common method is to use an ejector pin to protrude from the bottom of the molding space where the molded product remains, and then let the molded product fall under its own weight and be recovered. It was hot.

However, in the above conventional technology, when the resin to be injected is a liquid resin such as silicone rubber, the liquid resin infiltrates the sliding surface of the mold and the ejector pin, causing burrs to form on the molded product and causing the molded product to deteriorate. The problem was that it became defective.

Another problem was that the ejector pin did not function properly due to clogging of the resin.

Moreover, if the shape of the molded product is special, e.g.
When molding a molded product with many openings on the top and bottom surfaces, such as insulating materials for electrical component connectors,
Since a large number of pins for forming the openings are protruded from the mold surface of the mold, there is no suitable location for providing the protruding pins, making it difficult to select a contact location.

The purpose of this invention was to provide an opening between the fixed mold and the movable mold to cooperate with them to form a mold carving space, in view of the problems caused by the structural limitations of the molded product ejecting device based on the above-mentioned conventional technology. By movably intervening the intermediate plate having the structure, and by providing a protruding pin outside the fixed type and movable type system, the above-mentioned drawbacks are not only eliminated, but also the inconveniences are eliminated and it is extremely efficient. It is an object of the present invention to provide a molded product ejecting device for an injection molding machine that is capable of ejecting a molded product.

The structure of this invention, which meets the above objectives, is that when the molded product is taken out, the molded product is retained in the intermediate plate by being locked to the intermediate plate when the mold is opened, and the molded product is moved along with the intermediate plate to the opening/closing position of the mold. The gist is that the molded product can be moved to another position and then ejected from the intermediate plate using an ejector pin.

Next, an embodiment of this invention will be described below based on the drawings.

In the figure, 1 is a fixed type, and 2 is a movable type that can be moved left and right. The movable mold 2 has a protrusion 2a.
is formed, and the protrusion 2a is slidably fitted into the opening 4 of the guide plate 3. An intermediate plate 5 is held on the surface 3a of the guide plate 3 on the fixed mold 1 side so as to be vertically slidable. An opening 6 is bored in the intermediate plate 5, and as shown in FIG. 1, when the mold is clamped, it cooperates with the fixed mold 1 and the movable mold 2 to form a mold engraving space 7. Note that 6a is a recess formed in the wall surface of the opening 6, and forms an annular protrusion Ma on the molded product M.

A movable regulating rod 8 having a stopper 9 at its tip is planted on the back surface 3b of the guide plate 3.
It extends into an opening 10 formed in the movable mold 2. In addition, 11 is a step formed in the opening 10,
The stopper 9 of the movable regulating rod 8 comes into contact with it.

On the other hand, a guide plate regulating rod 12 having a stopper 13 at the tip is planted on the front surface of the fixed mold 1, and a notch 1 is bored in the intermediate plate 5 and opens on the outer periphery.
5 and a hole 14 in the guide plate 3 and extends into an opening 16 formed in the movable mold 2 .

Further, 17 is a movable drive rod that moves the movable mold 2 left and right to open and close the mold, and 18 is an intermediate plate drive rod that slides the intermediate plate 5 up and down along the surface 3a of the guide plate 3.

Further, an opening 19 is formed in the lower part of the guide plate 3, and a protruding cylinder 20 is provided in the opening 19.
A protruding pin 21 is housed inside so that it can freely come out and go out.

In addition, 22 is a nozzle head, and 23 is a sprue part.

In the above configuration, after the molded product M is formed in the die-carving space 7 by injection molding with liquid resin in the mold-clamped state shown in FIG. 1, as shown in FIG.
When the movable mold 2 is moved backward via the movable mold drive rod 17, the molded product M leaves the fixed mold 1, and the guide plate 3 and the intermediate plate 5 move together with the movable mold 2. At this time, since the annular protrusion Ma is formed in the molded product M by the recess 6a provided in the opening 6 of the intermediate plate 5, the molded product M can be reliably remained in the intermediate plate 5. I can do it.

When the backward movement continues and the stopper 13 of the guide plate regulating rod 12 comes into contact with the guide plate 3, the movement of the guide plate 3 and the intermediate plate 5 is regulated.

Further, when the movable mold 2 is moved backward, the tip of the movable mold 2 separates from the molded product M, and the tip protrusion 2a is pulled out from the opening 4 of the guide plate 3, as shown in FIG. break away. Then, the movable mold 2 stops moving back when the stopper 9 of the movable mold regulating rod 8 comes into contact with the stepped portion 11 of the opening 10.

Next, as shown in FIG. 4, the intermediate plate drive rod 1
When the intermediate plate 5 is pulled downward by the guide plate 8, the intermediate plate 5 slides on the surface 3a of the guide plate 3 and moves downward. At this time, since the notch 15 is open toward the outer periphery of the intermediate plate 5, the guide plate regulating rod 1
2 does not prevent the intermediate plate 5 from moving downward.

In this way, the intermediate plate 5 is moved out of the system of the fixed mold 1 and the movable mold 2, and the molded product M remaining in the intermediate plate 5 is stopped at a position aligned with the ejecting pin 21. After that, the protruding cylinder 2
0, the ejector pin 21 is advanced and protruded through the opening 19 of the guide plate 3, and the molded product M is ejected from the opening 6 of the intermediate plate 5.

In the above operation, a case has been described in which the molded product M first leaves the fixed mold 1 and then leaves the movable mold 2, but there is no problem even if it is the reverse.

That is, when the movable mold 2 first retreats away from the molded product M, the intermediate plate 5 and the guide plate 3 remain together with the fixed mold 1, and eventually the stepped portion 11 of the opening 10 of the movable mold 2 reaches the movable mold regulating rod 8. comes into contact with the stopper 9. Then, the guide plate 3 and the intermediate plate 5 held by the guide plate 3 begin to retreat together with the movable mold 2, and the molded product M leaves the fixed mold 1. Thereafter, the guide plate 3 and the intermediate plate 5 are stopped from retreating by the guide plate regulating rod 12, and are in the state shown in FIG. 3. The subsequent operations are the same as described above.

Although the above embodiment has been described as a horizontal type, it may be of a rigid type, and it goes without saying that the fixed type in this embodiment may be a movable type, and the movable type may be a fixed type.

As described above, according to this invention, the movable mold is slidably fitted into the opening of the guide plate, the intermediate plate is slidably held on the fixed mold side surface of the guide plate, and fixed to the intermediate plate. By forming an opening that cooperates with the mold and movable mold to form a mold-carving space, and further providing a protruding pin outside the system of the fixed mold and movable mold, it is possible to easily open the mold after injection molding. The molded product remains in the intermediate plate, and then the intermediate plate is moved to transfer the molded product to a position other than the mold opening/closing work position of the mold, and the molded product can be ejected using the ejector pin. As there is no need to protrude the ejector pin into the die engraving space, a good molded product can be obtained without burrs forming on the molded product, and accidents such as malfunction of the ejector pin due to clogging can occur. There is an excellent effect that there is no

In particular, in the case of a molded product that has many openings formed on its surface, even if the mold is provided with many pins for forming the openings, there is no need to protrude the ejector pins into the molding space. The practical benefit of being able to easily select the installation location of the ejector pin is great.

When moving the movable mold, the guide plate, and the intermediate plate, since the regulating rod, especially the guide plate regulating rod, is provided, there is an advantage that the movable mold and the guide plate are automatically separated.

Furthermore, since the protruding cylinder is attached to the guide plate, there is an effect that alignment with the molded product in the intermediate plate can be performed extremely easily.

In addition, a recess is formed in the wall surface of the opening for forming the die-cutting space in the intermediate plate, which increases the degree of engagement with the molded product and ensures that the molded product remains on the intermediate plate when the mold is opened. It's also effective.

Furthermore, the movable mold is slidably inserted into the opening of the guide plate, and when ejecting a molded product, the movable mold is moved back and separated from the intermediate plate and the guide plate, so that the intermediate plate itself By directly reciprocating the intermediate plate along the guide plate surface using the intermediate plate driving means, the above effect ensures that the molded product remaining in the intermediate plate is removed from the fixed mold plate and the movable mold system. Since the intermediate plate driving means can be moved to a position other than the mold opening/closing work position, a simple structure is sufficient for the intermediate plate driving means, and the operation is reliable and highly reliable.

[Brief explanation of drawings]

The figure shows an example of this invention.
The figure is a sectional view showing the mold clamping state, Figure 2 is the movable mold,
Sectional view showing the retracted state of the guide plate and intermediate plate, 3rd
The figure is a sectional view showing the detached state of the movable mold and the guide plate.
FIG. 4 is a sectional view showing the protruding state of the molded product. 1... Fixed type, 2... Movable type, 3... Information board,
5... Intermediate plate, 6... Opening, 7... Die engraving space, 8
...Movable regulation rod, 12...Guide plate regulation rod, 20
...Protrusion cylinder, 21...Protrusion pin, M
……Molding.

Claims (1)

[Scope of utility model registration request] In a molded product removal device for an injection molding machine comprising a fixed mold 1 and a movable mold 2, a guide plate 3 having an opening 4 into which the movable mold is slidably inserted is provided, and a guide plate 3 on the fixed mold side of the guide plate is provided. The intermediate plate 5 is slidably held on the surface 3a, and the intermediate plate is driven out of the system of the fixed mold and the movable mold along the surface 3a of the guide plate from which the movable mold has been removed from the opening 4. An intermediate plate driving means 18 is provided, and the intermediate plate is provided with a die carving space 7 in cooperation with the fixed die and the movable die.
A recess 6a is formed in the wall of the opening 6, and a protruding pin is provided outside the system in alignment with the opening 6 of the intermediate plate driven outside the system. 21. A molded product take-out device for an injection molding machine, characterized in that it is provided with a molded product take-out device.