JPH0780219B2 - Injection molding machine - Google Patents

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to an injection molding machine.

[0002]

2. Description of the Related Art FIG. 5 shows an example of a conventional injection molding machine.
This injection molding machine is a mold clamping device that movably arranges a movable die plate 3 with respect to a fixed die plate 2 on a pedestal 1 and opens and closes molds attached to the fixed die plate 2 and the movable die plate 3. 4, a hydraulic drive type injection device 5 for supplying resin into the mold is provided on the gantry 1.

The hydraulically driven injection device 5 is classified into various types such as a plunger type, a screw pre-plastic type and an in-line screw type. Among them, among them,
There is a so-called two-cylinder type injection device 5 in which injection cylinders for pressing the melted material into a mold and injecting it are arranged on the left and right of the heating cylinder 7.

The injection device 5 of this type includes, as other members of the injection cylinder and the heating cylinder 7, a hopper 8 for storing materials, a screw for plasticizing the injection material, and a screw rotating mechanism for rotating the screw. And a cylinder for moving the injection device for moving the entire injection device 5 in the front-back direction (the left-right direction in FIG. 5),
It has the characteristics that a relatively large injection pressure can be obtained and the length can be made compact.

[0005]

By the way, in the above-mentioned injection device 5, in order to operate the injection device 5, the operation is to send to the injection cylinders arranged on the left and right of the heating cylinder 7 and the cylinders for moving the injection device. It is necessary to provide hydraulic equipment such as a flow control valve for controlling the flow rate of oil, a pressure control valve for controlling the pressure of hydraulic oil, and a switching valve for switching the hydraulic circuit. Conventionally, those hydraulic equipment are hydraulic block 9 As a whole they were placed on the side of the gantry. In addition, the hydraulic equipment associated with the mold clamping device was arranged in the frame as a separate hydraulic block 9b.

Therefore, in order to avoid the interference with the gantry 1, the hydraulic pipe 9a extending from the injection device 5 and connected to the hydraulic block 9 is laterally extended from the injection device 5 by a predetermined distance to avoid the gantry 1. Under the present circumstances, it is curving so as to face downward at the point where the hydraulic equipment and the pipe are connected to a predetermined hydraulic equipment in the hydraulic block 9, and the hydraulic equipment and the pipe largely project to the side of the injection molding machine. There was a drawback that the whole was wide. In addition, since the piping path becomes long, a relay pipe is required on the way, and the piping work is troublesome.

The present invention has been made in view of the above circumstances. The hydraulic block and the pipe do not largely project laterally, the width of the entire device can be narrowed, the device can be made compact, and the piping work is facilitated. It is an object of the present invention to provide an injection molding machine.

[0008]

In order to achieve the above object, according to the present invention, at least a part of a portion corresponding to the injection device on the pedestal side is cut out, and a reinforcing member is attached to the inside of the cutout. A recess is formed on the side of the gantry, and a hydraulic circuit switching valve that controls the injection device, a flow rate control valve that controls the injection device, and a hydraulic block that includes a pressure control valve are arranged inside the gantry, and these hydraulic blocks are It is characterized in that the injection device is connected by a pipe group passing through the recess.

[0009]

As described above, since the concave portion is formed on the side portion of the pedestal and the concave portion is used as the piping space, and the hydraulic block is arranged inside the pedestal, the hydraulic block and the piping are mounted on the pedestal. The device can be made compact in the width direction without being overhanging to the side of the device. Further, since the piping path connecting the hydraulic block and the injection device becomes short, it becomes unnecessary to use a relay pipe,
The piping work can be simplified accordingly.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. The same components as those used in the conventional example are designated by the same reference numerals to simplify the description.

In the figure, reference numeral 10 is a mount, and the mount 1
An injection device 5 is arranged on the upper part of 0. Injection device 5
Is a heating cylinder 7 for melting the injected material, a hopper 8 for storing the material, injection cylinders 6, 6 for injecting and injecting the material melted by the heating cylinder 7, and a plastic material arranged in the heating cylinder. A screw rotating mechanism that rotates the screw, and a cylinder for moving the injection device that moves the entire injection device 5 in the front-rear direction (left-right direction in FIG. 5).

The mount 10 includes left and right side bars 12
a and 12a and upper and lower frames 12 and 13 assembled in a rectangular shape by front and rear end bars 12b, columns 14 connecting the upper and lower frames, and the frames 12 and
It is configured by a flat plate-shaped cover 15 that covers the support 13 and the support 14. The side bar 12a and the end bar 12b
Etc. are made of, for example, a steel material having a square cross section.

Injection device 5 for the upper side bar 12a
The notch 16 is provided at the position corresponding to the leg of the
A reinforcing member 17 is attached to the inside of the notch 16 by welding the abutting portions of the side bar and the end bar, thereby forming a recess 18 on the side of the gantry 10. The reinforcing member 17 is made of a steel material having a square cross section, which is the same material as the side bars and the end bars.

A hydraulic block 2 is provided inside the gantry 10 and substantially below the tip nozzle 5a of the injection device 5.
0 is placed. The hydraulic block 20 includes a flow rate control valve that controls the flow rate of hydraulic oil sent to the injection cylinder 7 or a cylinder for moving the injection device, a pressure control valve that controls the pressure of hydraulic oil, a switching valve that switches hydraulic circuits, and a hydraulic circuit. It consists of various hydraulic devices such as safety valves that ensure the safety of the. The hydraulic block 20 and the injection device 5 are connected by pipes P ... Which pass through the recess 18. An end plate 22 is provided in the notched portion of the upper side bar 12a in a standing state so as to be connected to the lower frame 13, and a through hole 22a through which the pipe P penetrates is provided in the end plate 22. Has been formed.

According to the injection molding machine having the above structure, however, the recess 18 is formed in the side portion of the gantry 1 and the recess 18 is used as a piping space, and the hydraulic block 20 is used inside the gantry 10. Since the hydraulic block 20 and the pipe P do not largely project to the side portion of the gantry 10 since they are arranged in the above position, the device can be made compact in the width direction.

In this way, a part of the gantry 10 can be cut out because the width of the gantry 10 is originally the width m of the mold clamping device 4.
(Specifically, it is determined by the size of the fixed (movable) die plate), and if the injection device 5 is considered alone, it does not need to be that wide. Therefore, since a part of the gantry 10 corresponding to the injection device 5 and not used originally is cut out, the function of the device itself of the injection molding machine is not hindered.

Further, since the pipe path connecting the hydraulic block 20 and the injection device 5 is shortened, it is not necessary to use a relay pipe as in the conventional example, and a direct connection pipe can be used for connection. The work can be simplified and the weight can be reduced.

The fact that the width of the apparatus can be narrowed as described above is significant especially in the case where two injection cylinders are provided as in the embodiment. That is, in the case of the structure in which the injection cylinders 6 and 6 are arranged on the left and right of the heating cylinder 7, the width of the device tends to increase only by securing the space for disposing the cylinders 6 and 7, but as described above. By providing the concave portion 18 on the side portion of the gantry and using the concave portion 18 as a piping space, it is possible to prevent the width of the device from increasing further, which is very significant in this respect.

In the above embodiment, the frame 10 is
Although a frame is formed by using a steel material having a square cross section, and a structure in which the surface thereof is covered with a flat plate-shaped cover 15 is used, the present invention is not limited to this, The present invention can also be applied to a frame having a structure in which a simple plate-shaped member is combined in a box shape.

In the embodiment, the hydraulic block 20 is also provided.
Is disposed substantially below the injection nozzle of the injection device, but is not limited to this, and may be disposed, for example, below the mold clamping device 4, as long as it is disposed inside the gantry 10. Is enough.

[0021]

As described above, according to the present invention, at least a part of the portion corresponding to the injection device on the side of the gantry is cut out, and the reinforcing member is attached to the inside of the notch, and the side of the gantry is attached. A recess is formed in the base, and a hydraulic block including a hydraulic circuit switching valve, a flow rate control valve and a pressure control valve for controlling the injection device is arranged inside the gantry, and the hydraulic block and the injection device pass through the recess. Since the hydraulic blocks and the pipes are connected to each other by the pipe group, the hydraulic blocks and the pipes do not largely project to the side of the gantry, and the device can be made compact in the width direction. Further, since the hydraulic path and the injection device are connected to each other and the piping path is shortened, it is not necessary to use a relay pipe, and the piping work can be simplified and the weight can be reduced accordingly.

[Brief description of drawings]

FIG. 1 is a plan view of an injection device and its peripheral equipment according to an embodiment of the present invention.

FIG. 2 is a side view of a part of the injection device and the pedestal of the same embodiment.

FIG. 3 is a plan view of the entire injection molding machine of the same embodiment.

FIG. 4 is a side view of the injection molding machine according to the embodiment.

FIG. 5 is a perspective view showing a conventional example of an injection molding machine.

[Explanation of symbols]

 2 Fixed die plate 3 Moving die plate 4 Mold clamping device 5 Injection device 10 Stand 16 Notch 17 Reinforcing member 18 Recess 20 Hydraulic block

Claims (1)

[Claims] 1. A mold clamping device for movably arranging a movable die plate with respect to a fixed die plate and opening and closing molds attached to the fixed die plate and the movable die plate is provided on the frame. In an injection molding machine provided with a hydraulically driven injection device for supplying resin into the mold, at least a part of a portion corresponding to the injection device on the gantry side portion is cut out, and the cutout is made. A reinforcing member is attached to the inside to form a recess on a side portion of the gantry, and a hydraulic circuit switching valve that controls the injection device, a hydraulic block including a flow control valve and a pressure control valve is disposed inside the gantry, An injection molding machine characterized in that the hydraulic block and the injection device are connected by a pipe group passing through the recess.