Injection molding machine driving device and injection device

Abstract

The object is to provide an injection molding machine driving device capable of generating a large thrust and of continuous drive with a short cycle. It comprises a casing body (11), a cylindrical linear motor (14) provided with a mover (12) disposed in the casing body (11) for advance and retraction and a stator (13) attached to the casing body (11), the linear motor (14) constituting a first drive section, a driven body (15) advanced and retracted together with the mover (12), and a second drive section attached to the casing body (11) and disposed so as to axially overlap the linear motor (14) at least partially. A slight axial increase in the radial dimension makes it possible to sufficiently increase the area of a permanent magnet (23) for the mover (12), thus increasing the capacity of the linear motor (14).

Description

technical field [0001] The present invention relates to a driving device and an injection device of an injection molding machine. Background technique [0002] Conventionally, hydraulic or electric drive devices have been used to generate thrust in various mechanical devices. [0003] In addition, the molding machine in the mechanical device, such as the injection molding machine, injects the resin heated and melted in the heating cylinder with high pressure, fills it into the cavity space of the mold device, and cools and solidifies in the cavity space to become moldings. [0004] The injection molding machine described above has a mold device, a mold clamping device, and an injection device. In addition, the mold device includes a fixed mold and a movable mold, and the mold clamping device includes a fixed platen on which the fixed mold is mounted, a movable platen on which the movable mold is mounted, and a mold clamping mechanism. By making the mold clamping mechanism ...

AI Technical Summary

Problems solved by technology

[0015] However, if a linear motor is used in the drive device of the prior art described above, since the linear motor does not have a speed reduction mechanism, when the linear motor is installed as a drive device in an injection molding machine, which is a mechanical device with a high load, , if you want to generate a large thrust or drive continuously with a short cycle, it is necessary to increase the power of the linear motor

[0016] Therefore, in order to enlarge the capacity of the linear motor, it is only necessary to enlarge the area of ​​the permanent magnet used in the linear motor, but since the shape of the linear motor is generally flat, if the area of ​​the permanent magnet is enlarged, not only the linear motor will become larger , the driving device is correspondingly enlarged, and the cost of the driving device is correspondingly high

In addition, the weight of the mover also increases corresponding to the increase in the area of ​​the permanent magnet, and the high speed and corresponding characteristics of the driving device cannot be sufficiently improved.

[0017] In addition, when a linear motor is used in the injection device, since the linear motor for injection and the motor for metering are arranged adjacent to each other on the same straight line, the size of the output device in the axial direction becomes larger and the size increases accordingly. up

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