High-precision automatic control device for extruder output weight per unit length

Abstract

A high-precision automatic control device for the weight per unit length of extruder output. The input end of the controller is connected to the weighing device, and the output end of the controller is connected to the drive motor of the extrusion screw of the extruder or the drive of the traction roller. motor connection. The weighing device includes a raw material hopper, a frame and a weighing hopper. The raw material hopper is installed on the upper end of the frame, and a gate is installed at the outlet of the lower end of the raw material hopper; the weighing hopper is installed under the raw material hopper, and one side of the weighing hopper is connected to the One end of a lever is connected, and the other end of the lever is equipped with a fixed counterweight. The fulcrum of the lever is hinged on the frame, and a lower proximity switch is installed under the fixed counterweight; The movable counterweight is vertically slidably supported on a counterweight bracket, and an upper proximity switch is arranged below the movable counterweight; the gate, the upper proximity switch and the lower proximity switch are connected to the controller respectively. The advantages are: the structure is simplified, the cost is reduced, the control principle is simple, and the control precision is improved.

Description

technical field [0001] The invention relates to a high-precision automatic control device for the weight per unit length of extruder discharge, which is mainly used for controlling the length of discharge on film blowing machines, tube pulling machines, wire and cable machines, plastic winding machines and spinning (rod) machines , The uniformity of thickness is controlled. Background technique [0002] A basic method for controlling the uniformity of the discharge of the extruder in the prior art is to use a balance type weighing device to measure and calculate the feed rate (that is, the amount of raw material entering the extruder per unit time), and then Control the rotation speed of the extruding screw or the pulling roller of the extruder according to the feeding speed, so that the feeding speed is inversely proportional to the rotating speed of the extrusion screw, or directly proportional to the rotating speed of the pulling roller, so as to keep the film thickness u...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a high-precision automatic control device for extruder discharge unit length weight to solve...

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