Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method of representing extrusion pressure via three-point process based on Benbow-Bridgwater model

A technology of extrusion pressure and three-point method, which is used in special data processing applications, instruments, electrical digital data processing, etc. problem, to achieve the effect of improving the characterization accuracy and facilitating the optimization

Active Publication Date: 2017-10-13
NANJING AGRICULTURAL UNIVERSITY
View PDF3 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual extrusion process of the paste material, even in a stable state, the local inhomogeneity of the paste material caused by the air bubbles and agglomeration in the paste material will cause fluctuations in the extrusion pressure. Therefore, using a single point The interpolation method to characterize the extrusion pressure causes a relatively large error between the predicted value of the extrusion pressure and the measured value, which is very unfavorable to the optimization of the material extrusion system and process parameters, and affects the extrusion accuracy. In severe cases, it will cause the extrusion process to fail

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 of representing extrusion pressure via three-point process based on Benbow-Bridgwater model
  • Method of representing extrusion pressure via three-point process based on Benbow-Bridgwater model
  • Method of representing extrusion pressure via three-point process based on Benbow-Bridgwater model

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] Below in conjunction with accompanying drawing and embodiment, the present invention will be further described:

[0033] figure 1 A schematic diagram of the Benbow-Bridgwater model explaining the process of the paste material flowing from the barrel containing the paste material to the capillary and extruded from the nozzle under the extrusion pressure, as shown in figure 1 As shown, the paste material 4 is contained in a diameter D 0 In the barrel 1, the pressure head 2 presses the paste material 4 into a nozzle (or capillary) 5 with a diameter D and a length L under the action of an extrusion pressure 3 . On entering the nozzle 5 from the barrel 1 , the paste material 4 extends in the flow direction and its cross-section decreases and exits the nozzle opening 8 at an extrusion velocity (V) 7 to form an extrudate 6 . The important feature of the capillary 5 is that the diameter D is very small, the flow of the paste material in the capillary is only laminar and not t...

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 of representing extrusion pressure, in particular to a method of representing extrusion pressure via a three-point process based on Benbow-Bridgwater model; the method comprises the main steps of (1) acquiring extrusion pressure Pi via three-point testing; (2) calculating average extrusion pressure P0 when length-to-diameter ratio of a nozzle is equal to zero; (3) acquiring an analytical model for representing extrusion pressure via the three-point process. Extrusion pressure representation is one of the most key factors to successfully achieve the material extrusion technique or not; in traditional representation methods, a single-point method is used to estimate extrusion pressure when the length-to-diameter ratio of the nozzle is zero, and great errors are caused. In order to solve the problems, for example, traditional representation methods are low in precision, optimization of material extrusion systems and process parameters is not favored, and extrusion precision is affected, the simple, convenience and practical method for representing extrusion pressure is provided; extrusion pressure representing precision is improved, and the method may act as a common method of representing extrusion pressure.

Description

technical field [0001] The invention relates to a characterization method of extrusion pressure, in particular to a characterization method of extrusion pressure based on the Benbow-Bridgwater model, and belongs to the technical field of material extrusion. Background technique [0002] Material extrusion technology has very important applications in many fields, such as the field of additive manufacturing (3D printing). In January 2012, the American Society for Testing and Materials F42 Additive Manufacturing Committee standardized additive manufacturing technology. Material extrusion It is one of the seven main additive manufacturing technologies, which has a very broad application prospect and important application value. Extrusion pressure characterization is one of the most critical factors for the successful realization of material extrusion technology. In 1993, John Benbow and John Bridgwater established a model of paste material flow and extrusion, which is called th...

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
Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50B33Y50/00
CPCB33Y50/00G06F30/20G06F2111/06G06F2119/06G06F2119/18
Inventor 仲高艳杨守峰嵇明远
Owner NANJING AGRICULTURAL UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com