Analysis of the extrusion pressure of a cylindrical extruder for extruding highly viscous fluids

Sun, Zhuang; Shen, Baojun; He, Yu; Long, Jiecai; Zhan, Xueying; Li, Yujin; Li, Xiwen

doi:10.1007/s11814-022-1191-3

“…In this paper, as shown in Figure 1，An extruder equipment generally consists of a main machine, auxiliary machine and control system [7]. The main extruder consists of three parts: the extrusion system, the drive system and the heating and cooling sys-tem [8][9][10]. The extrusion system is the key part of the extruder mainframe, which con-sists mainly of the screw, barrel and head.…”

Section: Plastic Extruder System Constructionmentioning

confidence: 99%

Research and application of adaptive anti-interference based VU-fuzzy-PID algorithm in temperature control system of platic extruder

Meng,

Sun,

Ruan

et al. 2024

Preprint

0

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Plastic profiles, as the basic material for social and economic development, are mainly processed and moulded by plastic extruders. In the production process of plastic profiles, the temperature precision control of plastic extruder directly affects the plasticising and mixing effect of raw mate-rials. Therefore, the development of high-precision, fast response and stable plastic extruder tem-perature control system plays a key role in the development of plastic profile industry. In order to solve the shortcomings of the plastic extruder such as low temperature precision, slow response speed and poor anti-interference ability, the author has established a plastic extruder temperature control system model based on the study of PID control strategies and fuzzy PID control strategies, combined with the structural and functional characteristics of plastic extruder. Adopting a variable universe fuzzy PID control strategy to improve the performance of the plastic extruder temperature control system. The core idea of this strategy is to introduce proportional factors to change the range of the fuzzy domain. Under the condition that the fuzzy rules remain unchanged, the fuzzy domain compresses as the error decreases and expands as the error increases. Changing the domain is equivalent to adding fuzzy control rules within the same domain, thereby completing the dynamic adjustment of PID controller parameters. Through MATLAB simulation analysis and comparison, it was found that this control strategy has the advantages of short rise time, no overshoot, and strong anti-interference compared to PID control and fuzzy PID control strategies. Finally, through ex-perimental verification, it was found that this control strategy significantly changes the temperature control effect of nonlinear time-varying extruders, and has good adaptability and stability.

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“…In this paper, as shown in Figure 1，An extruder equipment generally consists of a main machine, auxiliary machine and control system [7]. The main extruder consists of three parts: the extrusion system, the drive system and the heating and cooling system [8][9][10]. The extrusion system is the key part of the extruder mainframe, which consists mainly of the screw, barrel and head.…”

Section: Plastic Extruder System Constructionmentioning

confidence: 99%

Research and Application of Plastic Extruder Temperature System Based on Variable Universe Fuzzy PID Control

Meng

¹

,

Gao

²

,

Ruan

³

et al. 2023

Preprint

0

View full text Add to dashboard Cite

Plastic profiles, as the basic material for social and economic development, are mainly processed and moulded by plastic extruders. In the production process of plastic profiles, the temperature precision control of plastic extruder directly affects the plasticising and mixing effect of raw mate-rials. Therefore, the development of high-precision, fast response and stable plastic extruder tem-perature control system plays a key role in the development of plastic profile industry. In order to solve the shortcomings of the plastic extruder such as low temperature precision, slow response speed and poor anti-interference ability, the author has established a plastic extruder temperature control system model based on the study of PID control strategies and fuzzy PID control strategies, combined with the structural and functional characteristics of plastic extruder. Adopting a variable universe fuzzy PID control strategy to improve the performance of the plastic extruder temperature control system. The core idea of this strategy is to introduce proportional factors to change the range of the fuzzy domain. Under the condition that the fuzzy rules remain unchanged, the fuzzy domain compresses as the error decreases and expands as the error increases. Changing the domain is equivalent to adding fuzzy control rules within the same domain, thereby completing the dynamic adjustment of PID controller parameters. Through MATLAB simulation analysis and comparison, it was found that this control strategy has the advantages of short rise time, no overshoot, and strong anti-interference compared to PID control and fuzzy PID control strategies. Finally, through ex-perimental verification, it was found that this control strategy significantly changes the temperature control effect of nonlinear time-varying extruders, and has good adaptability and stability.

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Three-dimensional numerical simulations and experimental studies on the viscoelastic rheological and deformation behavior of polymer catheter in gas-assisted extrusion processing

Zhang,

Huang,

Chen

2024

Physics of Fluids

0

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Gas-assisted extrusion is an effective method for improving the deformation behavior of polymer catheters during extrusion. However, the underlying mechanisms that dictate how geometrical and constitutive models influence the complex rheological behavior of the melt are not yet fully understood, which hinders further utilization and optimization. In this study, the three-dimensional (3D) gas–liquid–gas model for catheter gas-assisted extrusion was constructed. Subsequently, the Bird–Carreau model and the Phan–Thien–Tanner (PTT) model were employed in finite element numerical simulations to analyze the complex behavior. For comparative analysis, simplified two-dimensional (2D) model numerical simulations were also conducted. Additionally, experiments on catheter gas-assisted extrusion and parameterization studies of key constitutive model parameters were performed. The findings indicate that the 3D model, when integrated with the PTT constitutive model, demonstrates superior predictability and aligns more closely with experimental results. Furthermore, as the flow rate increases, discrepancies among different models diminish, and the distance required for the melt and gas to achieve motion equilibrium decreases. The internal mechanisms behind these phenomena are elucidated through the analysis of velocity and stress field distributions. This research enhances our understanding of the complex rheological behavior in polymer catheter gas-assisted extrusion, providing valuable insights for both academic research and industrial production in this field.

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Analysis of the extrusion pressure of a cylindrical extruder for extruding highly viscous fluids

Cited by 4 publications

References 39 publications

Research and application of adaptive anti-interference based VU-fuzzy-PID algorithm in temperature control system of platic extruder

Research and application of adaptive anti-interference based VU-fuzzy-PID algorithm in temperature control system of platic extruder

Research and Application of Plastic Extruder Temperature System Based on Variable Universe Fuzzy PID Control

Three-dimensional numerical simulations and experimental studies on the viscoelastic rheological and deformation behavior of polymer catheter in gas-assisted extrusion processing

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