Method and device for controlling conical twin-screw extruder

A twin-screw extruder and twin-screw extrusion technology, applied in the field of plastic processing, can solve the problems of sudden change of material specific gravity screw torque, screw breakage, uneven thickness of pipe products, etc., and achieve the effect of increasing output

Inactive Publication Date: 2013-09-04
GUANGDONG LIANSU MACHINERY MFG
View PDF7 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, PVC powder has various reasons such as uneven feeding and different material specific gravity, which can easily cause sudden changes in the screw torque, which can easily cause une

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and device for controlling conical twin-screw extruder
  • Method and device for controlling conical twin-screw extruder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] In the present invention, a low-cost temperature control meter is used to control the temperature of the heating zone, and a conventional electrical circuit is used to control the start and stop of the extruder main engine, the feeding motor and the traction motor, but the motor speed is controlled by a small programmable logic controller integrated machine. Take control. This can not only achieve good control effect, but also lower cost, and it is easier to promote in the industry.

[0027] refer to figure 2 As shown, the main motor startup, synchronous acceleration, synchronous deceleration, main motor acceleration, main motor deceleration, feeding motor acceleration, feeding motor deceleration, traction motor acceleration are respectively connected to pins X0-X7, and the traction motor deceleration is connected to pin X10 c...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a method for controlling a conical twin-screw extruder. The method comprises the following steps of: S1, setting a conventional current signal and a current deviation value; S2, collecting current signals of a main motor of the conical twin-screw extruder; S3, comparing the collected current signals with a set normal current signal so as to obtain a deviation current; and S4, outputting the deviation current as a signal, and controlling the rotating speeds of the main motor, a feeding motor and a traction motor of the conical twin-screw extruder, wherein when the current of the main motor of the extruder is increased suddenly and deviated from the set deviation value, the speed of the main motor is reduced, and the speeds of the feeding motor and the traction motor are decreased in proportion; and conversely, when the current of the main motor of the extruder is decreased suddenly and deviated from the set deviation value, the speed of the main motor is increased, and the speeds of the feeding motor and the traction motor are increased in proportion. According to the method, through detecting the current mutation of the main motor of the conical twin-screw extruder, the current is operated, and after operation, the speeds of the main motor, the feeding motor and the traction motor are changed, and the main motor is kept running at a same torque. Therefore, various interference problems such as non-uniform blanking and the like causing the current changes of the main motor are solved. The invention also discloses a control device using the method.

Description

technical field [0001] The invention relates to the technical field of plastic processing, in particular to a control method and control equipment of a conical twin-screw extruder. Background technique [0002] Conical twin-screw extruder is a common equipment in the plastic manufacturing industry, such as the extruder disclosed in the patent number 201110094947.X. [0003] At present, in the entire extruder industry, there are mainly two types of controls for conical twin-screw extruders. 1. Control the start-stop and running speed of the extruder main engine, feeding motor and traction motor through a simple electrical circuit; control and adjust the temperature of the main engine barrel and mold through the temperature control table. This control method has low cost, but when the production speed is to be increased or decreased, the synchronous control effect is not good, and the product quality is easily affected. 2. The start-stop and running speed of the extruder hos...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B29C47/92B29C48/92
CPCB29C48/40B29C48/92B29C2948/92095B29C2948/92457B29C2948/9259B29C2948/92885
Inventor 黄正雄黄彦淇甄焕财
Owner GUANGDONG LIANSU MACHINERY MFG
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap