Dynamic area optimization and control system of glue mixing and applying of planed fiber artificial board

Abstract

The invention provides a dynamic area optimization and control system of glue blending and applying process production of a planed fiber artificial board. The system realizes glue mixing by dynamic proportioning and dynamic glue applying process control in a constant proportion through specific value follow-up adjustment, dynamic area optimization and a high-precision fluid control technology, thereby improving the constant proportion glue applying precision and the glue mixing proportioning accuracy. The process control system comprises a parallel glue mixing mechanism consisting of a gas injector, a pipeline, a flowmeter, a pump valve, a pot group, and the like, an on-line glue applying mechanism and a fully-automatic glue mixing and applying control system consisting of a sensing and detecting module, an intelligent calculating module, a flow control module, a management module, a communication module, a diagnosis and alarm module, and the like. Control methods mainly comprise a dynamic specific value follow-up adjustment method, an area liquid level optimum control method and a pseudo-differential feedback flow control method. The invention improves the dynamic stability of the glue mixing and applying system and realizes the accuracy control of the glue mixing and applying process, thereby improving the product quality, reducing glue liquid and raw material loss and improving the automatic and continuous production and the productivity level of equipment.

Description

Technical field: [0001] The present invention relates to a control method and control system for particleboard and fiberboard (planed fiber-based wood-based panels) blending and applying process, which are mainly used in the production line of planed fiber-based wood-based panels in the field of wood processing to meet the needs of fully automatic continuous production in the glue-mixing and applying section. The process control requirements of dynamic ratio glue adjustment and dynamic constant ratio glue sizing. technical background: [0002] Planed fiber-based wood-based panels are mainstream products in domestic and foreign wood-based panel production, market demand and future development, and are the main method and approach for the economical and effective utilization of biomass material resources. The planed fiber-based wood-based panel industry is a resource-dependent industry based on forest resources. How to realize the virtuous cycle and development of the fiber-b...

AI Technical Summary

Problems solved by technology

[0004] The sizing process is mainly based on batch sizing. With this production process, the measurement is inaccurate; the work reliability is poor, the sizing amount is unstable and uneven; the glue is easy to pre-cure in advance, and the performance of the glue is reduced; Large, even the failure of the glue due to the failure of the production line, the waste is serious, the production cost is high, and it cannot meet the requirements for the deployment and application of environmentally friendly adhesives;

[0005] The control method is mainly based on the liquid level control method and the metering cylinder control method. The pure hysteresis problem of the sizing control system cannot be effectively solved, and the resulting control error directly affects the control effect. The error of the sizing ratio is large, and the sizing amount Unstable, uneven, large amount of glue, it is difficult to achieve the best ratio of glue and quantitative control of raw materials according to the process requirements, resulting in increased production costs and reduced quality

Especially for continuous glue mixing, the automatic metering of glue and materials (shavings or fibers) and the inaccurate metering of the two, the level of full-automatic and continuous production is low, lack of dynamic adjustment and ratio follow-up tracking capabilities, and cannot meet the requirements of environmental protection. Adhesive preparation and application requirements

[0006] In addition, foreign equipment products are expensive. Due to technical and financial problems, some domestic enterprises cannot upgrade and update in time. The equipment is outdated, and it is difficult to adapt to the requirements of new technology and automatic control production.

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