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Method for detecting foreign matters

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

Active Publication Date: 2013-02-20
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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  • Method for detecting foreign matters
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Experimental program
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Embodiment Construction

[0025] Figure 1a, F akt Indicates the change curve of the measurand over 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 measurand. f REF Indicates the change curve of the same measurand over time t during the previous closing process. Due to the problem-free operation of the previous closing process, this profile is used as a reference variable.

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

[0027] Figures 2a and 2b repres...

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Abstract

Exceeding a threshold (S) is determined by a parameter (Eint) yielded over a time (t) through stabilized integration of a faulty size (E). A starting time point for integrating a faulty size is chosen as that point in time, at which a measured size and / or a faulty size exceed a predefined adjustable value. The progression of the measured size in an earlier closing process is used as a reference size.

Description

technical field [0001] The invention relates to a method of detecting foreign objects between the flask halves of a die casting machine during closing, wherein an error amount is obtained by comparing a measured value of the current closing process with a reference amount, and a threshold value is determined. Background technique [0002] Two groups of methods for detecting objects sandwiched between the sides of a flask are known in the prior art. [0003] The methods of the first group are mainly based on the fact that (e.g. in the area of ​​mold protection (Formschutzbereich)) the maximum possible force acting on the flask half is limited and / or the time required for testing a specific mold protection area (Formschutzstrecke) , and / or evaluate the adjustment error of the mold position (Formposition) or velocity. [0004] A second set of methods compares one or more specific signal profiles of one or more measurements to a reference signal in which no components are locat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N19/08
CPCB29C2945/76006B29C45/844B29C2945/76943B29C2945/76866B29C2945/7623B29C2945/76224B29C2945/76033B29C2945/76013
Inventor 热诺特·格雷伯梅尔
Owner ENGEL AUSTRIA