JPH0615858U - Mold ejector plate structure - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an ejector plate structure of a mold capable of incorporating a device such as a local pressurizing cylinder even in a molding machine having an automatic coupling mechanism in an extrusion mechanism. An ejector plate 4 attached to the movable platen side of a movable die plate 1 mounted on the movable platen, and an auxiliary plate 5 connected to the movable platen side via a tie rod 6 so as to face the ejector plate 4. The device installation space 7 is formed between the ejector plate 4 and the auxiliary plate 5, and the connection portion 9 with the extrusion mechanism attached to the movable platen is formed.
Were provided on the auxiliary plate 5.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an ejector plate structure of a mold used in a die casting machine, an injection molding machine or the like.

[0002]

[Prior art]

 2. Description of the Related Art Conventionally, as a product extrusion device for a molding machine, there are those described in, for example, JP-A-56-47258 and JP-A-3-204152. In this product extruding apparatus, as shown in FIG. 2, the extruding rod 20 is made movable in the mold opening / closing direction by an extruding cylinder 21 and is inserted into a movable platen 22, while the extruding rod 20 has a movable platen 22 at the tip thereof. A mounting plate 24 having a clamp plate 23 mounted on the side surface is attached. Further, an ejector plate 28 is attached to the movable platen 22 side of a movable die plate 26 mounted on the movable platen 22 via a die spacer 25 via a return pin 27, and a small diameter is attached to the movable platen 22 side of the ejector plate 28. A connecting pin 29 having a neck portion 29a is provided in a protruding manner. Then, the connecting pin 29 is inserted into the insertion hole 24a formed in the mounting plate 24 and the locking hole 23a formed in the clamp plate 23, and the ejector plate 28 is superposed on the mounting plate 24. The locking hole 23a of the clamp plate 23 is moved and engaged with the neck portion 29a of the connecting pin 29 to prevent the connecting pin 29 from coming off. As described above, an automatic connecting mechanism for automatically connecting the ejector plate 28 in a detachable manner is provided in the pushing mechanism constituted by the pushing rod 20 and the pushing cylinder 21.

[0003]

[Problems to be solved by the device]

 However, in the above-described conventional molding machine having the automatic coupling mechanism in the pushing mechanism, the coupling pin 29 provided on the ejector plate 28 is clamped and fixed to the mounting plate 24, so that the clamp plate 23 is attached to the side surface of the movable platen 22 of the mounting plate 24. Since the piston rod cannot be penetrated through the clamp plate 23 and the mounting plate 24, a local pressurizing cylinder is installed on the movable platen 22 side of the ejector plate 28. Could not be used. When a local pressurizing cylinder is used, as shown in FIG. 3, the movable platen 22 is not connected to the ejector plate 28 in which the screw hole 30 for screwing the pushing rod is formed instead of the connecting pin 29 of the automatic connecting mechanism. The local pressurizing cylinder 31 is installed (in the range of L in the figure), and it can be used only in a molding machine having no automatic connecting mechanism in the pushing mechanism.

The present invention has been made to solve the above problems, and it is an object of the present invention to provide an ejector plate structure of a mold capable of incorporating a device such as a local pressurizing cylinder even in a molding machine having an automatic coupling mechanism in an extrusion mechanism. To aim.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, an ejector plate structure of a mold according to the present invention is such that an ejector plate attached to a movable platen side of a movable die plate mounted on a movable platen and an ejector plate opposed to the ejector plate. And an auxiliary plate connected to the movable platen side via a tie rod, and the space between the ejector plate and the auxiliary plate is the equipment installation space, while the connection part with the extrusion mechanism attached to the movable platen is used. Is provided on the auxiliary plate.

[0006]

[Action]

 With the above configuration, the pushing mechanism can be connected to the auxiliary plate, and the ejecting plate can be moved by the pushing mechanism via the auxiliary plate and the tie rod.

Further, the ejector plate and the auxiliary plate can be moved without interfering with, for example, a local pressurizing cylinder installed between the ejector plate and the auxiliary plate.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a side view partially showing an ejector plate structure of a mold. In this figure, 1 is a movable die plate, 2 is a die spacer, 3 is a return pin, 4 is an ejector plate, and 5 is an auxiliary plate.

The movable die plate 1 is used by being mounted on a movable platen (not shown) via a die spacer 2. A plurality of return pins 3 are inserted through the movable die plate 1 and a movable die body (not shown) mounted on the movable die plate 1.

The ejector plate 4 is attached to the movable die plate 1 via the return pins 3 by connecting the base ends of the respective return pins 3 on the movable platen side of the movable die plate 1. The distance between the plate 4 and the movable die plate 1 is at least the stroke amount S of the ejector plate 4.

The auxiliary plate 5 is connected to the ejector plate 4 so as to face the movable platen via a plurality of tie rods 6. A device installation space 7 is defined between the auxiliary plate 5 and the ejector plate 4, and the distance is equal to or larger than the sum of the stroke amount S of the auxiliary plate 5 and the device installation space 7.

A local pressurizing cylinder 8, for example, is installed between the ejector plate 4 and the auxiliary plate 5, and a rod through hole (not shown) for inserting the piston rod of the cylinder 8 has an ejector plate 4 and a movable die. The plate 1 and the movable die body are formed so as to correspond to each other.

On the movable platen side of the auxiliary plate 5, a connecting pin 9 (connecting portion) forming a connecting portion with the pushing mechanism is provided in a protruding manner, and the connecting pin 9 has a neck portion 9a having a small diameter. Has been formed.

The extruding mechanism is composed of an extruding cylinder and an extruding rod (not shown), the extruding cylinder is installed behind the movable platen, the extruding rod is inserted through the movable platen, and the extruding cylinder causes the extruding rod to move in the mold opening / closing direction. It is possible to move to. A mounting plate 10 is mounted on the tip of the push rod, and a clamp plate 11 is mounted on the side surface of the movable platen of the mounting plate 10.

The connecting pin 9 is inserted into an insertion hole (not shown) formed in the mounting plate 10 and a locking hole (not shown) formed in the clamp plate 11, while the attachment plate 10 is attached to the auxiliary plate 5. In the overlapped state, the neck portion 9a of the connecting pin 9 is engaged with the locking hole of the clamp plate 11.

As described above, the push-out mechanism is provided with the automatic connecting mechanism that automatically and detachably connects the auxiliary plate 5.

In the above structure, when the auxiliary plate 5 is connected to the pushing mechanism by the automatic coupling mechanism and the auxiliary plate 5 is pushed by the pushing mechanism, the auxiliary plate 5 advances by the distance S toward the local pressurizing cylinder 8. And stops before the local pressurizing cylinder 8. The ejector plate 4 is pushed by the auxiliary plate 5 through the tie rod 6 and advances integrally with the auxiliary plate 5 by a distance S. Further, the return pin 3 is moved by the ejector plate 4 so that its tip portion projects from the inner surface of the movable die body.

In addition, when the auxiliary plate 5 is retracted to its original position during mold clamping, contrary to the above, the ejector plate 4 is pulled by the auxiliary plate 5 via the tie rod 6 and locally applied integrally with the auxiliary plate 5. It retreats a distance S toward the pressure cylinder 8 and returns to the original position.

As described above, the product knockout work can be performed by moving the ejector plate 4 and the auxiliary plate 5 without interfering with the local pressurizing cylinder 8 installed between the ejector plate 4 and the auxiliary plate 5. .

[0021]

[Effect of device]

 As described above, the present invention is directed to an ejector plate attached to the movable platen side of a movable die plate attached to the movable platen, and an auxiliary plate connected to the movable platen side via a tie rod so as to face the ejector plate. While the equipment installation space is defined between the ejector plate and the auxiliary plate, the automatic connection mechanism is provided because the auxiliary plate is provided with a connection part with the extrusion mechanism attached to the movable platen. It is possible to move the auxiliary plate and the ejector plate by the extruder mechanism without interfering with a device such as a local pressurizing cylinder installed between the auxiliary plate and the ejecting mechanism. Therefore, the product knockout work can be reliably performed, and the device can be built in between the ejector plate and the auxiliary plate regardless of the presence or absence of the automatic coupling mechanism in the extrusion mechanism.

[Brief description of drawings]

FIG. 1 is a side view partially showing an ejector plate structure of a mold according to an embodiment of the present invention.

FIG. 2 is a vertical sectional view showing an ejector plate structure of a mold which is a conventional example.

FIG. 3 is a side view corresponding to FIG. 1, showing an ejector plate structure of another conventional die.

[Explanation of symbols]

 1 Movable die plate 4 Ejector plate 5 Auxiliary plate 6 Tie rod 7 Equipment installation space 8 Local pressurizing cylinder (equipment) 9 Connecting pin (connecting portion) 10 Mounting plate 11 Clamp plate

Claims (1)

[Scope of utility model registration request] 1. An ejector plate attached to the movable platen side of a movable die plate attached to the movable platen, and an auxiliary plate connected to the movable platen side via a tie rod so as to face the ejector plate. Then, the ejector plate structure of the mold is characterized in that the device installation space is provided between the ejector plate and the auxiliary plate, and the auxiliary plate is provided with a connecting portion with the pushing mechanism attached to the movable platen. .