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Method for detecting foreign matters

A foreign object and measured technology, applied in the direction of measuring devices, mechanical devices, instruments, etc.

Active Publication Date: 2008-07-16
ENGEL AUSTRIA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, the plasticized clamped plastic part may also form a depression (Dellen) or a moving core on the flask half

Method used

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Experimental program
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Embodiment Construction

[0025] In Figure 1a, F akt It represents the change curve of the measured with time t in the current closing process. In this case, the closing force of the closing actuator of the die casting machine is used as the measured. F REF Represents the change curve of the same measured with time t during the previous closing process. Since the previous closing process ran without problems, this change curve was used as a reference quantity.

[0026] Fig. 1b shows the change process of the error amount E in the actual closing process. Determine the amount of error E by the following formula: E=F akt -F REF . It can be realized that at time t 1 And t 2 In between, there is a relatively small but constant error E of approximately 0.5. In order to be able to detect the amount of error in a conventional method, the threshold S must also be selected to be less than or equal to 0.5. This property is obtained in the case of clamped plastic parts.

[0027] Figures 2a and 2b, similar to Figures 1...

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Abstract

The invention provides a method for detecting foreign matters between half sides of flask of a pressure die casting machine during the closing process, wherein an error amount is obtained by comparing the measurand of the current closing process with a reference quantity, the threshold is confirmed, and a parameter obtained by stably accumulating error amount in time is detected to exceed the threshold.

Description

Technical field [0001] The present invention relates to a method for detecting foreign objects between the flask halves of a die casting machine during closing, in which an error amount is obtained by comparing the measured value of the current closing process with a reference amount, and a threshold value is determined. Background technique [0002] Two sets of methods for detecting objects sandwiched between the halves of the sand box are known in the prior art. [0003] The first group of methods is mainly based on the fact that (for example in the field of mold protection (Formschutzbereich)) the maximum possible force acting on the sand box half is limited, and / or the time required to check a specific mold protection zone (Formschutzstrecke) , And / or evaluate the adjustment error of the mold position (Formposition) or speed. [0004] The second set of methods compares one or more specific signal variation curves to be measured with a reference signal in which no part is loca...

Claims

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Application Information

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IPC IPC(8): G01N19/08
CPCB29C45/844B29C2945/76006B29C2945/76013B29C2945/76033B29C2945/76224B29C2945/7623B29C2945/76866B29C2945/76943
Inventor 热诺特·格雷伯梅尔
Owner ENGEL AUSTRIA