On-line weighing dispensing method based on feed speed control

Abstract

The on-line weighing and compounding method based on material feeding speed control is one kind of automatically controlled stepless speed regulating material compounding method for in-situ production, and can realize high precision weighing of complicated materials and improve production process control. The on-line weighing and compounding method determines the material feeding speed V through determining speed decrease index alpha and initial material feeding speed V0, and determines the material accumulation W through combining with the speed converting time t, so as to set and control the change of the material feeding speed V based on known weighed material Wall, control the weighing time T, and ensure the real-time weighed material W reaching to the known weighed material Wall at most.

Description

technical field [0001] The invention relates to an on-line weighing and proportioning method at a production site, in particular to a method for realizing high-precision weighing and proportioning based on speed control of feeding equipment. Background technique [0002] At present, in the manufacturing process of the rubber and plastic industry, banknote printing and ink printing, and pharmaceutical preparation and other industries, it is necessary to carry out ingredients and raw material pre-preparation processes according to fixed formulas. The weighing process is an automatic feeding and unloading process, as well as a batching ratio process for mixing multiple raw materials. In the link of process control and product quality improvement, realizing the accurate ratio of raw materials is a key factor affecting and determining product quality. [0003] In the existing raw material formula, in addition to the large amount of the main material, it is often necessary to add...

AI Technical Summary

Problems solved by technology

At present, in order to improve the process control of batching accuracy on the production site, manual batching or constant-speed feeding equipment is generally used to achieve it, so its shortcomings and limitations in controlling the ratio accuracy and batching efficiency are more obvious

[0004] 1. If there are many types of materials and their characteristics, colors and shapes are relatively similar, the batching operators will easily make mistakes if they are not concentrated, which will seriously affect the quality of materials and production safety;

[0005] 2. Due to the objective existence of material adhesion, in the same environment and the same feeding device, the feeding speed of different materials will change due to the different adhesion of materials, resulting in difficulties in debugging and difficult control of weighing accuracy

[0006] 3. Due to the density of the material, the feeding speed will be different even if the same weighing device and the same control method are used due to the different density of the material.

Existing feeding equipment and control technology cannot solve this problem

[0007] 4. The control of the existing feeding device is a nonlinear operation. Even under the same control method and variable control, the vibration force and speed are different, which has a great influence and restriction on the batching accuracy.

[0008] As mentioned above, manual batching or control methods based on existing feeding devices are difficult to achieve on-site random adjustment control due to human factors, or poor adaptability to material characteristics and environmental changes. For different materials or the same material Different states, batches and quality changes, the weighing accuracy cannot be guaranteed, the production efficiency is low, and the weighing time is long

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