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Failure detection device for injection molding machine

An injection molding machine and abnormality detection technology, applied in the field of abnormality detection device

Active Publication Date: 2013-04-10
FANUC LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, the subject of this technology is to reduce the error between the detected load and the actual load when the motor temperature fluctuates, not to improve the accuracy of abnormality detection when the actual load fluctuates.

Method used

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  • Failure detection device for injection molding machine
  • Failure detection device for injection molding machine
  • Failure detection device for injection molding machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] use figure 1 One embodiment of the abnormality detection device of the injection molding machine of the present invention will be described.

[0031] The main body of the injection molding machine consists of a clamping unit and an injection unit. The clamping unit is composed of a fixed plate 1 , a rear plate 2 , a movable plate 3 , a toggle mechanism 6 and the like arranged on a chassis 15 . The injection unit is composed of an injection cylinder 20, an injection screw 22, a servo motor 25 for injection, and the like. These mold clamping parts or injection molding parts include a plurality of movable parts such as the movable plate 3 and the ejector 13 as will be described later.

[0032] First, the mold clamping section constituting the main body of the injection molding machine will be described.

[0033] The fixed plate 1 and the rear plate 2 are connected by a plurality of connecting rods 4 . A movable plate 3 is arranged between the fixed plate 1 and the rear ...

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PUM

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Abstract

The invention provides a failure detection device for an injection molding machine. Corresponding to an elapsed time from a started closing die, a load applied onto a servomotor for closing die is stored as a reference load. A first portion in a die closing zone is set as a failure detection zone, where a failure is detected when the reference load and current load surpasses predetermined failure determination threshold. And, a second portion in a die closing zone is set as a load changing detection zone. The predetermined failure determination threshold is modified according the changing in a load detected in the load changing detection zone. And, failure is detected when the reference load and current load surpasses modified threshold.

Description

technical field [0001] The invention relates to an abnormality detection device of an injection molding machine. Background technique [0002] In the mold opening and closing operation or the movement of ejecting the molded product in the injection molding cycle of using the injection molding machine, the load of the motor driving the movable part is performed according to the time or the position of the movable part as a reference load. storage. Then, the stored reference load and the actual motor load are sequentially compared in association with the time or the position of the movable part. As a result of this comparison, whether or not the difference between the reference load and the actual load is within a preset allowable range detects an abnormality in the mold opening and closing operation or ejection operation, and stops the injection molding machine. The above-mentioned measures prevent damage to the mechanical part of the injection molding machine or the metal ...

Claims

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Application Information

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IPC IPC(8): B29C45/84
CPCB29C45/76B29C45/768B29C45/7653B29C2945/76013B29C2945/7623B29C2945/76387B29C2945/76913B29C2945/76943
Inventor 丸山淳平细谷佑一
Owner FANUC LTD