Optimization of a Reinforcing-Rib Design for ABS and High Glossy Surfaces of Plastic Parts

2013 ◽  
Vol 330 ◽  
pp. 724-729 ◽  
Author(s):  
Seong Won Jeong
Keyword(s):  
Influential Factor ◽  
Injection Mold ◽  
Section Thickness ◽  
Box Behnken Design ◽  
Design Variables ◽  
Draft Angle ◽  
Abs Resin ◽  
Reinforcing Ribs ◽  
Sink Marks ◽  
Plastic Parts

The goal of this study is to determine the optimum value of design variables in mixed conditions of the thickness, height and draft angle of reinforcing ribs within an objective limit in ABS resin and a high glossy surface. For this purpose, we investigated the actual depths of sink marks on the surface of the specimen that was manufactured with an injection mold specifically for this study. A response surface methodology with the Box-Behnken design was used to analyze the real depths with combinations of the thickness, height and draft angle of the ribs. The result shows that the most influential factor to increase the shrinkage is the thickness of ribs and that the optimum value of the rib thickness is a multiple of 0.31 of the section thickness. It was found that the rib height and rib draft angle are not factors that can change the sink amount.

scholarly journals Response of green roof performance to multiple hydrologic and design variables: a laboratory investigation

2018 ◽  
Vol 77 (12) ◽  
pp. 2834-2840 ◽  
Author(s):  
Musa Akther ◽  
Jianxun He ◽  
Angus Chu ◽  
Caterina Valeo ◽  
Usman T. Khan ◽  
...  
Keyword(s):  
Early Stage ◽  
Green Roof ◽  
Influential Factor ◽  
Moisture Condition ◽  
Antecedent Moisture ◽  
Design Variables ◽  
Multiple Dimensions ◽  
Growing Medium ◽  
Roof Design ◽  
Main Effects

Abstract Multiple factors affect green roof performance and their effects might vary at different stages of operation. This paper aimed to link green roof performance to hydrologic variables (antecedent moisture condition (AMC) and rainfall intensity) and design variables (growing medium (GM) type and depth) under multiple dimensions at the early stage of operation using laboratory experiment data. The results showed that the AMC is the most influential factor of hydrologic performance, whereas the GM type appeared to primarily affect the nutrient levels of the outflow. The significant main effects of other variables and interaction effects between two variables point to challenges in green roof design.

Study on Improving the Life of Stereolithography Injection Mold

2012 ◽  
Vol 468-471 ◽  
pp. 1013-1016 ◽  
Author(s):  
Hua Qing Lai
Keyword(s):  
Injection Molding ◽  
Injection Molding Process ◽  
Injection Mold ◽  
Molding Process ◽  
Molded Parts ◽  
Injection Molded ◽  
Plastic Parts ◽  
Assembly Operations ◽  
Conventional Injection Molding ◽  
Shape And Size

Molding is one of the most versatile and important processes for manufacturing complex plastic parts. It is a method of fabricating plastic parts by utilizing a mold or cavity that has a shape and size similar to the part being produced. Molten polymer is injected into the cavity, resulting in the desired part upon solidification. The injection-molded parts typically have excellent dimensional tolerance and require almost no finishing and assembly operations. But new variations and emerging innovations of conventional injection molding have been continuously developed to offer special features and benefits that cannot be accomplished by the conventional injection molding process. This study aims to improving the life of stereolithography injection mold.

scholarly journals Removal of lead from aqueous solutions using three biosorbents of aquatic origin with the emphasis on the affective factors

2022 ◽  
Vol 12 (1) ◽  
Author(s):  
Maryam Rezaei ◽  
Nima Pourang ◽  
Ali Mashinchian Moradi
Keyword(s):  
Aqueous Solutions ◽  
Langmuir Model ◽  
Influential Factor ◽  
Freundlich Model ◽  
Box Behnken Design ◽  
Initial Concentration ◽  
Affective Factors ◽  
Maximum Sorption ◽  
First Time ◽  
Xrf Analyses

AbstractThe biosorptive potentials of three aquatics-based biosorbents, including shells of a bivalve mollusk and scales of two fish species for Pb removal from aqueous solutions were evaluated, for the first time. A Box–Behnken design with the response surface methodology was used to investigate the effects of the seven important variables (contact time, temperature, initial concentration, dosage, size, salinity and pH) on the sorption capacity of the sorbents. Among the seven studied factors, the effects of biosorbent dosage, initial concentration and pH were significant for all the response variables, while biosorbent size was not significant for any of the responses. The initial concentration was the most influential factor. The presence of Pb ions on the surfaces of the biosorbents after the adsorption was clearly confirmed by the SEM–EDX and XRF analyses. The maximum sorption capacities of the biosorbents were comparable to the literature and the descending order was as follows: scales of Rutilus kutum and Oncorhynchus mykiss and the shells of Cerastoderma glaucum. The isotherm studies revealed Langmuir model applicability for the Pb adsorption by R. kutum and O. mykiss scales, while Freundlich model was fitted to the adsorption C. glaucum shells.

Optimization of Packing Pressure Curve in Injection Molding Based on Numerical Simulation

2011 ◽  
Vol 221 ◽  
pp. 522-527 ◽  
Author(s):  
Hui Min Zhang ◽  
Meng Li ◽  
Lu Lu Yang
Keyword(s):  
Numerical Simulation ◽  
Dimensional Accuracy ◽  
Pressure Curve ◽  
Cavity Pressure ◽  
Second Stage ◽  
Packing Pressure ◽  
Sink Marks ◽  
Plastic Parts ◽  
Two Stages ◽  
Intermediate Variables

The packing stage is the most important stage to plastic parts quality. If the packing curve is not set reasonably, non-uniform distribution of pressure is caused in injection mold cavities, which results in that plastic parts emerge a series of quality problems, such as: warpage, sink marks, and poor dimensional accuracy. Taking into consideration complexity of in the cavities in the packing stage, this paper set packing curve two stages. First stage packing pressure was set at constant so that cavity pressure also kept constant tendency, thus difference of shrinkage rate was reduced, and second stage was set at linear decreasing so that packing pressure hold consistent with cavity pressure that gradually decreased to zero with the melt curing, thereby residual stress was reduced. The packing curve values were optimized, by balancing cavity pressure that is the intermediate variables time after time by the numerical simulation technology. The best packing curve was ultimately got.

scholarly journals Coupled Structural-Rheological Numerical Analysis of Injection Mold

2021 ◽  
Author(s):  
Cedrico Oliveira ◽  
Nuno Peixinho ◽  
José Meireles
Keyword(s):  
Numerical Simulation ◽  
Numerical Analysis ◽  
Injection Mold ◽  
Simulation Approach ◽  
Time To Market ◽  
Plastic Parts ◽  
Transient Numerical Simulation

Abstract The production of injection molds is an important industry for manufacturing of plastic parts. Considering that time to market reduction is important, it becomes fundamental the use of numerical simulation to reduce design errors. The objective of this work is the presentation of an algorithm for the connection between Moldflow and ANSYS to import loads and then the study of the differences on the approaches studying the tool behavior when considering quasi-static or transient numerical simulation. From this work it was possible to have an overview of where each kind of simulation approach could be used.

The Complex Housing Injection Mold Design of Automobile Based on UG and Numerical Simulation

2014 ◽  
Vol 852 ◽  
pp. 547-551
Author(s):  
Yi Mei ◽  
Lang Chen ◽  
Guang Yan Wang
Keyword(s):  
Numerical Simulation ◽  
Computer Aided Design ◽  
Complex Surface ◽  
Structure Design ◽  
Simulation Software ◽  
Injection Mold ◽  
Development Cycle ◽  
Injection Mold Design ◽  
Plastic Parts ◽  
Aided Design

This paper analyzes the structure and process of an automobile with the switch case plastic parts,using injection molding numerical simulation software to analyze the position of gate,warpage and shrinkage. It provides design basis for the mold structure optimization. Finally, this article uses UG Mold Wizard platform to finish the package of structure design of injection mold completely,and solve the parting problems of complex surface .Realizing the plastic parts of the CAD / CAE / CAM computer-aided design, greatly shorten the development cycle.

scholarly journals Study on the Mechanism of the Packing Process and Sink Mark in External Gas-Assisted Injection Molding

2014 ◽  
Vol 6 ◽  
pp. 853142
Author(s):  
Shaofei Jiang ◽  
Jinlong Tao ◽  
Jiquan Li
Keyword(s):  
Injection Molding ◽  
Interaction Mechanism ◽  
Interface Morphology ◽  
Simulation Process ◽  
Condensate Layer ◽  
Fluent Software ◽  
Packing Process ◽  
Sink Marks ◽  
Plastic Parts ◽  
Sink Mark

External gas-assisted injection molding (EGAIM) technology can be applied to effectively reduce the sink marks generated from the shrinkage of plastic parts. In this paper, the interaction mechanism of gas and melting during the EGAIM stage was discussed. The causes of the sink marks on plastic parts as well as the influence of gas-melting interaction on the sink marks were analyzed. A corresponding physical model was established. Using plastic plate parts with stiffeners, for example, the EGAIM process was one-parameter simulated using Fluent software. The sink marks on the stiffeners, the interface morphology between the condensate layer and the gas, and other parameters were obtained. The effectiveness of the model, as well as the simulation process, was confirmed by experiment.

scholarly journals Automatic Recognition and Construction of Draft Angle for Injection Mold Design

2017 ◽  
Vol 10 (01) ◽  
pp. 78-93 ◽  
Author(s):  
Wen-Ren Jong ◽  
Tai-Chih Li ◽  
Yu-Wei Chen ◽  
Yu-Hung Ting
Keyword(s):  
Automatic Recognition ◽  
Mold Design ◽  
Injection Mold ◽  
Injection Mold Design ◽  
Draft Angle

Fatigue Source Analysis of Dynamic Mold Temperature Injection Mold for Large Plastic Parts

2011 ◽  
Vol 305 ◽  
pp. 210-213
Author(s):  
Xi Ping Li ◽  
Ning Ning Gong
Keyword(s):  
Evaluation Process ◽  
Mold Temperature ◽  
Source Analysis ◽  
Injection Mold ◽  
Working Process ◽  
Molding Process ◽  
Good Surface ◽  
Surface Performance ◽  
Injection Technology ◽  
Plastic Parts

Dynamic mold temperature (DMT) injection molding is a molding process that the mold cavity is first rapidly heated to a high temperature before plastic melt injection, and then cooled quickly after filling and packing stages. With this technique, plastic parts with very good surface performance can be produced. However, as the special mold structure and its worse working process, large stress concentration can be caused in the mold. Consequently, the mold for this new injection technology can be easily fatigue and the lifetime of the mold is inevitably decreased. In this paper, the structure of the mold was presented first, and then the working process and factors influencing the lifetime of the mold were analyzed. Through numerical simulation, the fatigue source of the mold was evaluated. Results showed that the evaluation process presented in this paper was very in accordance with the practical failure mold.

Optimization Design of LED Display Front Shell Injection Mold on Moldflow

2014 ◽  
Vol 536-537 ◽  
pp. 1439-1442
Author(s):  
Lei Lei Dong ◽  
Ran Ran Xin ◽  
Hui Min Zhang
Keyword(s):  
Optimization Design ◽  
Process Conditions ◽  
Injection Mold ◽  
Plastic Parts

Warping and distortion in plastic parts has been a serious problem in mold-injection.Traditional solution is to first produce a mold and then test the moldrepeatedly. By employing Moldflow, it can be easily to offer a precise analysisand prediction of warping in products. Meanwhile, the results can be used toadjust the designed structure and process conditions of the mold. Finally, themold and its products are optimized.

Sign in / Sign up

Export Citation Format

Share Document