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Method and device for controlling the quality during the production of an extruded polymer product

A technology for polymers and products, applied in the field of devices implementing the method, can solve problems such as quality signal deviation

Active Publication Date: 2007-08-01
SAURER GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has the disadvantage that, for example, measured value changes of process parameters that occur in the preprocessing melt have a delayed effect on the end product and thus lead to deviations in the quality signal

Method used

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  • Method and device for controlling the quality during the production of an extruded polymer product
  • Method and device for controlling the quality during the production of an extruded polymer product
  • Method and device for controlling the quality during the production of an extruded polymer product

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Embodiment Construction

[0033] FIG. 1 shows a device according to the invention for carrying out the method according to the invention. In this case, the production plant consists of a plurality of process modules 2.1, 2.2 and 2.3. The process modules 2.1, 2.2 and 2.3 constitute a process chain for the manufacture of a pipeline-like polymer product. To this end, an intermediate product 1 in the form of plastic granules, for example, is supplied to the manufacturing process and, after running through the process modules 2.1, 2.2 and 2.3, becomes a final tubular polymer product 4, for example a wire wound into a coil. Each process module 2.1, 2.2 and 2.3 is associated with at least one sensor device 3.1, 3.2 and 3.3. In this case, the process modules 2.1, 2.2 and 2.3 essentially comprise a plurality of process groups in order to be able to carry out a process step within the entire process chain. In this case, for example, the process module 2.1 can carry out a pretreatment of the plastic particles. ...

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Abstract

The invention relates to a method and a device for controlling the quality during the production of an extruded polymer product from a synthetic intermediate product. The production of the polymer product takes place continuously in several successive process steps, whereby a process parameter and / or a product parameter is / are detected in at least one of the process steps and is / are compared with a target value or target value range. A quality signal for determining the quality of the polymer product and / or a control signal for controlling one of the process steps is generated in accordance with this comparison. According to the invention, a measuring time and a throughput time are assigned to the process parameter and / or the product parameter, the throughput time characterising the current material flow for the respective process step up to the production of the finished polymer product. Changes in quality can thus be identified in advance and can be taken into account for statistical process control.

Description

technical field [0001] The invention relates to a method for quality control according to the preamble of claim 1 in the manufacture of a pipeline (strangförmigen) polymer product, and to a method for implementing Apparatus for the method. Background technique [0002] A method of this type is known from EP 0 644 282 A1. [0003] In the known method, during the production of the synthesis line, at least one process parameter or product parameter is measured for process control and quality control and compared with predetermined setpoint values ​​or tolerance ranges. On the basis of this comparison, a control signal for influencing the process control or a quality signal for determining the quality of the end product is generated. Among other things, the known method aims at using measurements carried out at a reference position in order to control a plurality of processing positions by means of control signals. [0004] Another method for monitoring the production process...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65H63/00D01D13/00B29C48/92
CPCD01D13/00B29C47/0014B29C2947/92704B65H63/00B29C2947/9258B29C2947/92895B29C47/0038B29C2947/92866B29C2947/92933B29C47/1018B29C2947/92514B29C47/0021B29C2947/9279B65H2701/31B29C48/92B29C48/05B29C2948/92704B29C48/08B29C48/001B29C48/287B29C2948/92514B29C2948/9258B29C2948/9279B29C2948/92866B29C2948/92895B29C2948/92933
Inventor R·米伦梅斯特M·博恩海姆
Owner SAURER GMBH & CO KG