A film thickness control system and bolt self-positioning method based on bolt self-positioning

A control system and self-positioning technology, applied in the field of film manufacturing, can solve the problems of instability, inaccurate manual judgment, and influence on the quality of film thickness control effect, so as to achieve a short automatic positioning process, prevent human judgment errors, and achieve uniform transverse thickness. Effects of Sex and Longitudinal Thickness Consistency

Active Publication Date: 2019-07-30
ZHEJIANG KINLEAD PACKAGING MATERIAL
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AI Technical Summary

Problems solved by technology

These two methods require manual auxiliary identification, measurement and judgment according to the actual production situation. Manual judgment is not only inaccurate, but also unstable.
Due to the lack of continuous and accurate positioning of the film profile, the thickness control effect of the film and the quality of the produced products are often affected

Method used

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  • A film thickness control system and bolt self-positioning method based on bolt self-positioning
  • A film thickness control system and bolt self-positioning method based on bolt self-positioning
  • A film thickness control system and bolt self-positioning method based on bolt self-positioning

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Embodiment Construction

[0040] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention is not limited to these embodiments. The present invention covers any alternatives, modifications, equivalent methods and schemes made within the spirit and scope of the present invention.

[0041] In order to provide the public with a thorough understanding of the present invention, specific details are set forth in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details.

[0042] In the following paragraphs the invention is described more specifically by way of example with reference to the accompanying drawings. It should be noted that all the drawings are in simplified form and use inaccurate scales, which are only used to facilitate and clearly assist the purpose of illustrating the embodiments of t...

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Abstract

The invention discloses a film thickness control system based on bolt self-positioning and a bolt self-positioning method. The film thickness control system comprises an extrusion unit, a cooling forming unit, a stretching unit, a thickness measuring unit, a monitoring control unit and a winding unit, The monitoring and control unit includes an acquisition module, a processing module, and a control module. The acquisition module transmits the film profile thickness curve data to the processing module. The processing module calculates and obtains the film thickness and estimates the position of each bolt of the extruder die head. Processing to reduce the estimation deviation, the control module adjusts the thickness of the film in the longitudinal direction and the transverse direction through the frequency converter and the die head adjuster respectively. The invention can quickly self-position the die head bolts, the adjustment action is small in the positioning process, and the influence of long-term bolt heating on normal production is avoided, and the accurate bolt positioning can avoid the problem that the thickness deviation is difficult to zero in the BOPP film manufacturing process , so that the thickness of the film in both transverse and longitudinal directions is highly consistent.

Description

technical field [0001] The invention relates to the technical field of film manufacturing, in particular to a film thickness control system based on bolt self-positioning and a bolt self-positioning method. Background technique [0002] BOPP film, that is, biaxially oriented polypropylene film, is made by biaxially stretching. It is a plastic product that is specially formed and processed by physical, chemical and mechanical means. BOPP production line is a nonlinear complex system. Its technological process mainly includes: raw material melting, extrusion, cooling forming, longitudinal stretching, transverse stretching, trimming, corona treatment, coiling, etc. [0003] The physical and mechanical properties such as tensile strength, elongation at break, turbidity, gloss, etc., which are the quality indicators of BOPP film products, are mainly determined by the properties of the material itself, so they are easy to meet the requirements. As the main control indicators of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C48/92B29C48/31B29C48/08B29L7/00
CPCB29C48/92B29C2948/92152B29L2007/002B29C48/08B29C48/0018B29C2948/92647
Inventor 陈利锋余序安
Owner ZHEJIANG KINLEAD PACKAGING MATERIAL
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