JP2003291174A - Motor-operated injection molding machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To accomplish facilitation of molding work and reduction of apparatus costs by making a hydraulic driving unit for actuating a hydraulic actuator be freely carried into/from the void of a machine base. <P>SOLUTION: In a motor-operated injection molding machine, in order to actuate the hydraulic actuator (6) set in a motor-operated injection molding part (50), the hydraulic driving unit (7) connected to a relay hose (16) connected to the hydraulic actuator (6) is made to be carried freely into/from the void (51) in the machine base (1). <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric injection molding machine, and more particularly to a hydraulic drive unit for operating a hydraulic actuator provided in an electric injection molding section, which can be freely put in and taken out from a space formed in a machine base. , Improve the working environment near the machine, do not dedicate the hydraulic drive unit to the electric injection molding machine, and also use it for other molding machines, realize the sharing of the hydraulic drive unit and achieve cost reduction For new improvements to do.

[0002]

2. Description of the Related Art As an electric injection molding machine of this type which has been conventionally used, what is shown in FIG. 3 is a machine base formed in a trapezoidal shape, and an electric drive is mounted on the machine base 1. The injection drive device 2 is provided. A heating cylinder 4 having a hopper 4a and a screw 18 rotatably installed therein is horizontally arranged in the injection driving device 2, and injection of molten resin is turned on / off at a tip end side of the heating cylinder 4. A shut-off nozzle 5 for turning off is provided. A mold clamping device 3 having a mold (not shown) for injection molding is arranged on the machine base 1 at a position ahead of the shutoff nozzle 5.

In the vicinity of the machine base 1, an electric motor 8 is connected via a coupling 9 to a hydraulic pump 10, an oil tank 12, and a power outlet 17 for driving the electric motor 8. A hydraulic drive unit 7 including a terminal box 13 for relaying the wiring 15 and the like is provided. Also, the hydraulic drive unit 7
A caster 14 having a roller 14a is provided in the lower part of the relay hose 16 provided in the hydraulic drive unit 7 is attached to the heating cylinder 4 for opening / closing the shutoff nozzle 5. Connected to the hydraulic actuator 6.

Next, the operation will be described. The resin in the heating cylinder 4 supplied from the hopper 4a is plasticized and melted by the rotation of the screw 18 connected to the injection drive device 2, is extruded to the front thereof, and is stored in the front of the heating cylinder 4. At this time, if the flow path of the shutoff nozzle 5 attached to the tip of the heating cylinder 4 is open and the viscosity of the molten resin is low or the pressure is high, the molten resin will flow out from the opening. The resin flow is stopped by closing the valve provided in the shut-off nozzle 5 to stop this flow. This valve needs to be automatically opened and closed in a series of molding steps, and is performed by the hydraulic actuator 6. The hydraulic pump 10 of the hydraulic drive unit 7 is used to drive the hydraulic actuator 6.
The pressure oil discharged from the pump is sent to the hydraulic actuator 6 via the relay hose 7 via the hydraulic control valve 11 and driven. The operation of the hydraulic actuator 6 is performed by the hydraulic control valve 11 so that the direction, speed and force can be changed according to the timing of the machine stroke. A hydraulic pump 10 mounted on the hydraulic drive unit 7 is driven via an electric motor 8 and a coupling 9, and its power source and hydraulic control valve 1
Control 1 is wiring 1 relayed from power outlet 17
Current and signals are sent by 5.

[0005]

Since the conventional electric injection molding machine is constructed and arranged as described above, it is necessary to install the hydraulic drive unit 7 in the vicinity of the main body of the machine. The space for installing the equipment was also narrowed, and the work environment was poor. In addition, a long hose and long wiring are required for relaying from the hydraulic drive unit to the hydraulic actuator, and there is a further adverse effect on the safety and aesthetics of the feet when moving around for the operator to operate. It was

The present invention has been made to solve the above problems, and in particular, a gap formed in a machine base with a hydraulic drive unit for operating a hydraulic actuator provided in an electric injection molding section. It can be freely put in and taken out, improving the working environment near the machine, and sharing the hydraulic drive unit by not using the hydraulic drive unit exclusively for the electric injection molding machine but also for other molding machines. It is an object of the present invention to provide an electric injection molding machine that achieves cost reduction.

[0007]

In the electric injection molding machine according to the present invention, a resin material melted and kneaded by a screw in a heating cylinder driven by an injection drive device provided on the machine base is used. In an electric injection molding machine including an electric injection molding unit configured to inject into the upper mold, the electric injection molding unit is connected to a relay hose connected to the hydraulic actuator for operating a hydraulic actuator provided in the electric injection molding unit. The hydraulic drive unit is configured so that it can be freely taken in and out of a space in the machine base, and the hydraulic drive unit is provided with casters having rollers. Has a linear sliding portion, and the linear sliding portion is slidably provided on a rail provided in the gap.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of an electric injection molding machine according to the present invention will be described below with reference to the drawings.
The same or equivalent parts as those of the conventional example will be described using the same reference numerals. In FIG. 1, reference numeral 1 denotes a machine base formed in a trapezoidal shape, and an injection drive device 2 driven electrically is provided on the machine base 1. The injection drive device 2 has a hopper 4a and a screw 18
A heating cylinder 4 rotatably installed inside is horizontally arranged,
A shut-off nozzle 5 for turning on / off the injection of the molten resin is provided on the front end side of the heating cylinder 4. A mold clamping device 3 having a mold (not shown) for injection molding is arranged on the machine base 1 at a position ahead of the shutoff nozzle 5. Therefore, the injection driving device 2, the heating cylinder 4, the screw 18, the mold clamping device 3 including a mold (not shown), and the like form the electric injection molding unit 50.

A power source for driving the hydraulic pump 10 and the oil tank 12 to which the electric motor 8 is connected via a coupling 9 and the electric motor 8 is provided in a space 51 formed at a substantially central position of the machine base 1. A hydraulic drive unit 7 including a terminal box 13 for relaying the wiring 15 connected to a power outlet 17 is provided.
A roller 14a is provided below the hydraulic drive unit 7.
And a relay hose 16 provided in the hydraulic drive unit 7 is connected to a hydraulic actuator 6 attached to the heating cylinder 4 to open / close the shutoff nozzle 5. Has been done.

The hydraulic drive unit 7 is provided so as to be freely taken in and out of the space 51 of the machine base 1, and the wiring 15
The relay hose 16 is significantly shorter than the conventional configuration shown in FIG. 3, and the wiring 15 is connected to a power outlet 17 provided on a wall 52 in the void 51. It is configured so as not to make a business trip outside the machine base 1. Further, the distance between the relay hose 16 and the hydraulic actuator 6 is also shorter than that of the conventional configuration. As the hydraulic actuator 6 to which the relay hose 16 is connected, the shutoff nozzle 5 is used as described above.
Although it only shows the application for opening and closing the valve,
It can be mounted on a hydraulic cylinder (core, valve gate, slide core) and a hydraulic ejector, a stripper cylinder, a hydraulic cylinder for injection, a hydraulic motor for rotation, a hydraulic cylinder for moving a device, and the like, which are provided in the mold.

Next, the operation will be described. First, the hydraulic drive unit 7 is installed in the space 51 of the machine base 1, and the wiring 15
Is connected to the power outlet 17 and the relay hose 16 is connected to the hydraulic actuator 6 to drive the electric motor 8 and the heating cylinder 4 supplied from the hopper 4a.
The resin inside is plasticized and melted by the rotation of the screw 18, is extruded in the front thereof, and is stored in the front of the heating cylinder 4.

In this case, the shutoff nozzle 5 is closed by the operation of the hydraulic actuator 6, and the opening / closing valve of the shutoff nozzle 5 is automatically performed in the molding process, and the operation of the hydraulic actuator 6 is performed by injection molding. It is performed by the hydraulic control valve 11 so that the direction, speed, and pressure can be changed by the program of the process.

FIG. 2 shows another form of the hydraulic drive unit 7 of FIG. 1, and instead of the caster 14 having the roller 14a, the rail 60 provided in the space 51 is shown.
On the other hand, the concave linear slide portion 61 provided in the lower portion of the hydraulic drive unit 7 engages with and slides along the arrow A.
The rail 60 can move linearly back and forth along the direction of
It is configured to be removable.

[0014]

Since the electric injection molding machine according to the present invention is configured as described above, the following effects can be obtained. In other words, since the hydraulic drive unit can be moved in and out of the air gap of the machine base, when operating the injection molding machine, install the hydraulic drive unit in the air gap so that the wiring and the relay hose are located on the side of the machine base. Therefore, there is no obstacle to the work of the operator, the molding work is greatly facilitated, and the maintenance at the time of failure is facilitated. Further, since the hydraulic drive unit does not need to be dedicated to the injection molding machine and can be used in combination with other machines, there is no need to invest as wasteful equipment and the equipment cost can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing an electric injection molding machine according to the present invention with a partial cutout.

FIG. 2 is a perspective view having a partial cutout showing another form of the main part of FIG.

FIG. 3 is a perspective view showing a conventional electric injection molding machine having a partial cutout.

[Explanation of symbols]

1 machine 2 injection drive 4 heating cylinder 6 Hydraulic actuator 7 Hydraulic drive unit 14 casters 14a roller 51 void 60 rails 61 Linear sliding part

Claims (3)

[Claims] 1. An injection drive device (2) provided on a machine base (1)
From the electric injection molding part (50) that is designed to inject the resin material melted and kneaded by the screw (18) in the heating cylinder (4) driven by the above into the mold on the machine base (1). In the electric injection molding machine, the hydraulic drive unit connected to the relay hose (16) connected to the hydraulic actuator (6) for operating the hydraulic actuator (6) provided in the electric injection molding section (50).
(7) is an electric injection molding machine characterized in that it can be inserted into and taken out of a space (51) in the machine base (1). 2. The hydraulic drive unit (7) includes a roller.
The electric injection molding machine according to claim 1, further comprising a caster (14) having the (14a). 3. The hydraulic drive unit (7) has a linear sliding portion (61), and the linear sliding portion (61) has the gap (51).
The electric injection molding machine according to claim 1, wherein the electric injection molding machine is slidably provided on a rail (60) provided therein.