Extruder batching and flow control system and control method thereof

Abstract

The invention provides an extruder batching and flow control system and a control method thereof. The control system comprises a weighing stock bin, a plurality of weighing devices, a feeding device and a mixed material bin, wherein the weighing stock bin consists of a main material bin and an auxiliary material bin; the plurality of weighing devices are respectively arranged on the main material bin and the auxiliary material bin; the feeding device is arranged below the auxiliary material bin; the mixed material bin is arranged below the main material bin and consists of a main material channel and an auxiliary material channel which are independent from each other, and the main material channel and the auxiliary material channel are commonly connected with a feed inlet of an extruder host; the extruder host consists of an extruder screw and a velocity sensor arranged on the extruder screw; outputs of a weighing sensor and the velocity sensor are respectively connected with a controller. Step-by-step operations of the batching technology management of raw materials and the quality control of products are changed into synchronous operations, so that the technology route is greatly shortened, and the environment interference link can be reduced; the original production mode that the batching management and the yield control are respectively controlled by two independent control systems is changed, the weighing, metering, mixed batching, raw material buffering and flow control are carried out simultaneously.

Description

technical field [0001] The invention relates to the plastic extrusion industry, in particular to an extruder batching and flow control system and a control method thereof. Background technique [0002] For the plastic extrusion industry, most customers currently have two needs: the management of the batching process of raw materials and the stable control of product quality. In response to the above two requirements, some manufacturers use batching devices to control the ratio of product raw materials, and some manufacturers choose extrusion control devices to control product quality. With the pursuit of higher and higher product quality in the industry, domestic and foreign Some manufacturers have started to adopt the technical solution of weight-increasing batching device + feeding device + extrusion control device. This technical solution controls the extrusion control device and weight-increasing feeding device through two separate control systems. This type of scheme h...

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned traditional technical solutions have the following disadvantages: 1. The process route is long; 2. The installation space requirement is relatively large; 3. The independent control of the batching device and the extrusion control device leads to a relatively complicated control system and a large error rate; 4. The equipment structure is complex and not Easy to operate and maintain; 5. Unable to eliminate more on-site environmental interference; 6. Too long process lines bring more environmental interference, and the risk of secondary stratification of raw materials increases

Images