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Extrusion blow moulding wall-thickness on-line control system based on image recognition technology and method thereof

A technology of extrusion blow molding and image recognition, which is applied in the field of wall thickness control of plastic extrusion blow molding products to achieve the effects of ensuring consistency, reducing scrap rate, and improving product performance

Inactive Publication Date: 2008-08-27
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at present, this technology is only used to measure the parison wall thickness distribution and diameter distribution, and there is no real-time use of image recognition to obtain the parison wall thickness distribution information for feedback control (that is, to control the gap between die openings) technology disclosure

Method used

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  • Extrusion blow moulding wall-thickness on-line control system based on image recognition technology and method thereof
  • Extrusion blow moulding wall-thickness on-line control system based on image recognition technology and method thereof
  • Extrusion blow moulding wall-thickness on-line control system based on image recognition technology and method thereof

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Embodiment

[0035] figure 1 A specific structure of the present invention is shown. Depend on figure 1 It can be seen that the wall thickness control system for extrusion blow molding products includes machine head 1, servo valve 2, extruder 3, rotational speed measuring device 4, programmable controller upper computer 5, programmable controller lower computer 6, parison wall Thick control board 7, RS232 communication card 8, display 9, video output card 10, RS232 serial port expansion card 11, industrial computer 12, image acquisition card 13, scriber 14, photoelectric sensor 15, camera 16; Described camera 16 passes through Cable is connected with image acquisition card 13, and described image acquisition card 13 is inserted on the mainboard of industrial computer 12 by PCI bus, and video output card 10 is inserted on the mainboard of industrial computer 12 by VGA bus, video output card 10 and display 9 The speed measuring device 4, the scriber 14 and the photoelectric sensor 15 are r...

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Abstract

The invention provides an on line control system of the wall thickness of an extrusion blowing molding product based on the image indication technology. The invention comprises a parison wall thickness on line detecting module, an engineering control processing module, and a die orifice gap controlling module, wherein the parison wall thickness on line detecting module is connected with the engineering control processing module, and the engineering control processing module is connected with the die orifice gap controlling module. The invention also provides an on line control method of the wall thickness of the extrusion blowing product, which comprises the following steps that: the distribution of the object parison wall thickness is achieved through debugging; the distribution information of the parison wall thickness is obtained on line; the die orifice gap curve of a head is corrected on line by adopting the fuzzy iterative learning control algorithm to ensure the wall thickness distribution of the final product to meet the requirement. The on line control system has the advantages that the system is stable, the operation is simple, the realization is easy, the cost is lower, the adjustment control can be detected and fed back in real time, the product performance is enhanced, the material consumption is reduced, and the product performance is ensured, the system can be conveniently applied to the technical innovation of prior blowing molding equipment, and the performance and the qualification rate of the blowing molding product can be remarkably enhanced.

Description

technical field [0001] The invention relates to a technology for controlling the wall thickness of plastic extrusion blow molding products, in particular to an online control system and method for the wall thickness of extrusion blow molding products based on image recognition technology. Background technique [0002] Excessive wall thickness of plastic blow molding products will lead to overweight products and unnecessary waste of materials, and reduce production efficiency; too small wall thickness will cause the mechanical properties of the product to fail to meet the design requirements. At present, in industrial production, the method of installing a parison wall thickness program controller on the extrusion blow molding machine is used to realize the control of the wall thickness of blow molded products. The parison wall thickness program controller moves the mandrel or die up and down through the electro-hydraulic servo system to change the size of the gap between the...

Claims

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Application Information

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IPC IPC(8): B29C49/78G05D5/03G05B19/418G05B13/02G06K9/20B29C49/04
Inventor 黄汉雄黄耿群李炯城
Owner SOUTH CHINA UNIV OF TECH
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