JPH07186182A - Injection molding machine - Google Patents

Abstract

PURPOSE:To perform mold opening and closing and mold clamping by the use of a kind of a driving device by providing an operation plate having a pressure mechanism for pressing a movable die plate, and by moving the movable die plate via the pressing mechanism in use of the driving device to close the mold, and thereafter securing the operation plate to a fixed die plate and then pressing it with the pressing mechanism. CONSTITUTION:A operation plate 15 is movably supported on the back surface of a movable die plate 7, and on the upper and lower ends of the operation plate, a pressure link 17 provided with a pressure part 21 capable of pressing the movable die plate 7 is swayingly provided about a swaying pin 19. The movement of the piston rod 25 of a hydraulic cylinder 27 in the approaching direction to a fixed die plate 11 in the form of molds 5, 9 spaced therefrom causes the pressing part 21 of the pressure link 17 to press the movable die plate 7 for performing mold clamping. Subsequently, after securing the operation plate 15 to a main body frame 3 by a fixing device 37, the pressing link 17 is allowed to sway through the operation of the hydraulic cylinder 27, and mold clamping is conducted by pressing the movable die plate 7 with the pressing part 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injection molding machine for injection molding.

[0002]

2. Description of the Related Art Japanese Patent Publication 1-
There is one disclosed in Japanese Patent No. 22138. To briefly explain this prior art, a movable die plate having a movable die for injection molding and a fixed die plate having a fixed die for injection molding face each other on a main body frame as a base of the injection molding machine. It is provided. The movable die plate can move in a direction of approaching and separating from the fixed die plate, and the fixed die plate is fixed to the main body frame. Since the movable die plate is moved in a direction approaching and separating from the fixed die plate and the mold is closed and opened by a pair of injection molding dies, the fixed die plate can be moved in the approaching and separating direction. A boost cylinder device having a piston rod is provided, and the tip end of the piston rod is connected to the moving die plate. Further, since the movable die plate is pressed in the direction approaching the fixed die plate and the mold is clamped by the pair of injection molding dies, the fixed die plate is provided with a diver capable of moving in the approaching and separating directions. A tightening cylinder device is provided, and the tip end side of the diver penetrates a guide hole provided in the moving die plate, and the moving die plate can be fixed to the diver by an appropriate fixing device.

Therefore, under the condition that the pair of injection molding dies are separated from each other, the boost cylinder device is actuated to move the movable die plate and the fixed die plate in a direction approaching the movable die plate and the fixed die plate. Is joined to a fixed mold for injection molding, and the mold is closed by a pair of injection molds. After the mold is closed, the fixing device is appropriately operated to fix the moving die plate to the diver. Then, the movable die plate is pressed toward the fixed die plate by the operation of the die clamping cylinder device, and the die is clamped by the pair of injection molding dies.

After the mold is clamped, the melted and plasticized material is injected and filled into the molding part formed between the pair of injection molding dies, and the material is cooled in the molding part. Then, the pressing force of the moving die plate is removed by the operation of the mold clamping cylinder device, and the fixing device is appropriately operated to release the fixed state of the moving die plate and the diver.

After releasing the fixed state of the movable die plate and the diver, the boost cylinder device is operated to move the movable die plate in a direction away from the fixed die plate. Thereby, the mold opening can be performed by the pair of injection molding dies. The molded product is released from the mold during the mold opening or after the mold opening.

[0006]

However, since the mold opening and the mold closing are performed by the operation of the boost cylinder device and the mold clamping is performed by the operation of the mold clamping cylinder device, in the conventional injection molding machine, the boost cylinder device is used. However, there is a problem that two types of hydraulic cylinder devices (an example of a drive device) such as a mold clamping cylinder device are required, and the cost is increased.

Therefore, an object of the present invention is to provide an injection molding machine capable of performing mold opening, mold closing, and mold clamping by one type of driving device in order to solve the above problems.

[0008]

In order to solve the above-mentioned conventional problems, in the present invention, as a first means, a fixed die plate having a fixed mold on one side and the fixed mold are provided. A moving die plate which is provided on one side so as to move toward and away from the fixed die plate, and a moving die plate which moves toward and away from the other side of the moving die plate. An operation plate provided so as to be capable of contacting the movable die plate, and a pressing mechanism provided on the operation plate.
A driving device that moves the movable die plate in a direction approaching the fixed die plate via the pressing mechanism, and the movable die and the fixed die, and after closing the mold, the operation plate is And a fixing device for fixing the fixed die plate to the fixed die plate, and when the driving force of the driving device exceeds a predetermined value, the pressing mechanism presses the moving die plate in a direction approaching the fixed die plate. It is characterized in that

As a second means, a fixed die plate having a fixed die on one side and a movable die for joining to the fixed die are provided on one side, and the movable die is moved toward and away from the fixed die plate. A movable die plate movably provided to the movable die plate, an operation plate provided on the other side of the movable die plate so as to be movable toward and away from the movable die plate, and an abutting portion capable of abutting the movable die plate. A driving device that includes a pressing link provided on the actuating plate and a drive rod that is connected to the pressing link and is movable in the approaching and separating directions; and a driving device that moves the moving die plate in the approaching direction. When the mold is closed by the movable mold and the fixed mold, a regulating means for regulating the swinging of the pressing link in the direction of pressing the movable die plate, and after the mold is closed. , Characterized in that it has a locking device and which allowed to fix the actuating plate to the fixed die plate.

[0010]

According to the first means, under the condition that the pair of molds are separated from each other, the movable die plate is moved in the direction approaching the fixed die plate through the pressing mechanism by the drive of the drive device to move. The mold can be closed by joining the mold to a fixed mold.

After the mold is closed by a pair of molds, the fixing device is appropriately operated to fix the working plate to the fixed die plate. Further, when the driving device is driven and the driving force exceeds a predetermined value, the moving die plate can be pressed by the pressing mechanism in the direction of approaching the fixed die plate, and the mold clamping can be performed by the pair of molds.

After the mold is clamped, the molten and plasticized material is injection-filled into the molding part formed between the pair of molds, and the material is cooled in the molding part. Then, the pressing force of the pressing mechanism is removed by the driving device, and the fixing device is appropriately operated to release the fixed state between the working plate and the fixed die plate. Then, the mold opening is performed by a pair of molds.

By the second means, the drive rod is moved in the direction of approaching the fixed die plate by the drive of the drive device under the state where the pair of molds are separated from each other. As a result, the movable die plate is moved in a direction approaching the fixed die plate, the movable die is joined to the fixed die, and the die can be closed. At this time, the pressing link does not swing in the direction of pressing the moving die plate by the restricting means.

After the mold is closed by a pair of molds, the fixing device is appropriately operated to fix the working plate to the fixed die plate. Then, by driving the drive device, the pressing link is swung in the approaching direction against the regulation force of the regulation means. As a result, the movable die plate can be pressed by the pressing link, and the mold can be clamped by the pair of molds.

After the mold is clamped, the molten and plasticized material is injection-filled into the molding part formed between the pair of molds, and the material is cooled in the molding part. Then, the pressing force of the pressing link is removed by driving the driving device, and the fixing device is appropriately operated to release the fixed state between the working plate and the fixed die plate.

After releasing the fixed state of the operating plate and the fixed die plate, the driving rod is moved in the direction away from the fixed die plate by the driving of the driving device.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to this embodiment will be described below with reference to the drawings.

Referring to FIGS. 1 and 2, a main body frame 3 as a base of the injection molding machine 1 includes a movable die plate 7 provided with a movable die 5 for injection molding on the right side and a fixed die for injection molding. A fixed die plate 11 having 9 on the left side is provided so as to face left and right. The movable die plate 7 is movable in the left-right direction to approach and move away from the fixed die plate 11, and the fixed die plate 11 is moved to the main body plate 3.
It is fixed against.

On the left side of the movable die plate 7, there are provided a plurality of support bars 13 protruding leftward, and an operation plate 15 is supported on the plurality of support bars 13 so as to be movable in the left and right directions. Pressing links 17 are provided at the upper and lower ends of the operating plate 15 so as to be swingable around a swinging pin 19, and each pressing link 17 is moved by the moving die plate 7.
A pressing portion 21 capable of pressing a proper position on the left side of is provided.

In order to swing each pressing link 17 in the left-right direction, the side plate 23 standing on the body frame 3 is provided with a hydraulic rod cylinder (drive rod) provided with a piston rod 25 (an example of a drive rod) movable in the left-right direction. An example of the device) 27 is provided, and this piston rod 25 is oscillatably connected to the tip end portion of the pressing link 17 via an intermediate link 29 via a connecting pin 31. It should be noted that the hydraulic cylinder device 27 may be configured to be swingable in the left-right direction without using the intermediate link 29, and the piston rod 25 may be oscillatably connected to the tip end portion of the pressing link 17. Before pressing the molds with the pair of injection molding molds 5 and 9, each pressing link 17
A spring 35 for urging the pressing links 17 is provided between each pressing link 17 and the operating plate 15 in order to restrict the rightward swinging of the pressing link 17.

Each side plate 23 is provided with a fixing device 37 for fixing the operating plate 15 to the main body frame 3 after the molds are closed by the pair of injection molding dies 5 and 9. The fixing device 37 includes a pair of half nuts 41 that can be opened and closed by the operation of the fixed cylinder 39.
The pair of half nuts 41 form a part of the actuating plate 15 and can engage with the engaging portion 43a of the engaging rod 43 protruding leftward.

In order for the movable die plate 7 to move integrally to the left when the operating plate 15 moves to the left, the movable die plate 7 is attached to the engaging rod 43.
An engaging member 45 that can be engaged is provided on the right side of the.

The operation of this embodiment will be described based on the above-mentioned configuration.

With the pair of injection molding dies 5 and 9 separated from each other, the piston rod 25 is moved to the right toward the fixed die plate 11 by the operation of the hydraulic cylinder device 27. As a result, the pressing link 17
The left side of the movable die plate 7 is pressed by the pressing portion 21 of. Therefore, the movable die plate 7 is moved in the rightward direction in which the movable die plate 7 approaches, and the movable mold 5 for injection molding can be joined to the fixed mold 9 for injection molding to close the mold. At this time, the pressing link 17 does not swing rightward due to the biasing force of the spring 35.

After the molds are closed by the pair of injection molding dies 5 and 9, the pair of half nuts 39 of the fixing device 37 are engaged with the engaging portions 43a to operate the operating plate 1.
5 is fixed to the body frame 3. Then, the operation of the hydraulic cylinder device 27 causes the pressing link 17 to swing against the biasing force of the spring 35 in the approaching right direction. Thereby, the left side of the movable die plate 7 can be pressed by the pressing portion 21, and the mold can be clamped by the pair of injection molding dies 5 and 9. Here, since the pressing portion 21 is configured to be located closer to the swing pin 19 than the connecting pin 31, the lever portion is used to press the right side of the moving die plate 7 with a large force by the pressing portion 21. can do.

After the mold is clamped, the molten and plasticized material is injection-filled into the molding part formed between the pair of injection molding dies 5 and 9, and the material is cooled in the molding part. . Then, the pressing force of the pressing link 17 is removed by the operation of the hydraulic cylinder device 27, and the fixing device 37 is appropriately operated to release the fixed state between the operating plate 15 and the main body frame 3.

After releasing the fixed state between the operating plate 15 and the main body frame 3, the piston rod 25 is moved rightward away from the fixed die plate 11 by the operation of the hydraulic cylinder device 27. As a result, the locking member 45 is locked on the right side of the moving die plate 7, the moving die plate 7 is moved leftward integrally with the operating plate 15, and the pair of injection molding dies 5, 9 are used. Mold opening can be performed.

Further, the molded product is released from the mold either during the mold opening or after the mold opening.

According to the present embodiment as described above, the mold is closed, the mold is opened and the mold is clamped by one type of the hydraulic cylinder device 27.
Since it is not necessary to use the mold clamping cylinder device, the cost can be reduced.

The present invention is not limited to the above description of the embodiments, but can be implemented in various other modes by making appropriate changes.

[0031]

As will be understood from the above description of the embodiments, according to the present invention, the molds are closed, the molds are opened and the molds are clamped by one kind of driving device. The cost can be reduced by reducing the amount.

[Brief description of drawings]

FIG. 1 is a perspective view of an injection molding machine.

FIG. 2 is a front view of an injection molding machine.

[Explanation of symbols]

 1 Injection Molding Machine 3 Body Frame 5 Moving Mold for Injection Molding 7 Moving Die Plate 9 Moving Fixed Mold for Injection Molding 11 Fixed Die Plate 15 Working Plate 17 Pressing Link 21 Pressing Part 25 Piston Rod 27 Hydraulic Cylinder Device 35 Spring 37 Fixing Device 45 Locking member

Claims (2)

[Claims] 1. A fixed die plate having a fixed die on one side, and a movable die joined to the fixed die on one side so that the movable die can move toward and away from the fixed die plate. The movable plate includes a movable die plate, an operation plate provided on the other side of the movable die plate so as to be movable toward and away from the movable die plate, and an abutting portion capable of abutting the movable die plate. And a drive device for moving the movable die plate in a direction approaching the fixed die plate via the pressing mechanism, and performing mold closing by the movable mold and the fixed mold. And a fixing device for fixing the operating plate to the fixed die plate, and the pressing mechanism causes the moving die to move when the driving force of the driving device exceeds a predetermined value. An injection molding machine, characterized in that the plate is pressed in a direction approaching the fixed die plate. 2. A fixed die plate having a fixed die on one side, and a movable die joined to the fixed die on one side so that the fixed die plate can be moved toward and away from the fixed die plate. The movable plate includes a movable die plate, an operation plate provided on the other side of the movable die plate so as to be movable toward and away from the movable die plate, and an abutting portion capable of abutting the movable die plate. And a drive device that is connected to the pressure link and includes a drive rod that is movable in the approaching and separating directions, and that drives the moving die plate in the approaching direction, and the moving die. When the mold is closed by the fixed mold, a restricting unit that restricts the pressing link from swinging in the direction of pressing the movable die plate, and the operation plate after the mold is closed. An injection molding machine comprising: a fixing device that fixes the rate to the fixed die plate.