Transient Heat Transfer Simulation in Rapid Heat Cycle Molding with Electric Heating

2012 ◽  
Vol 497 ◽  
pp. 121-125
Author(s):  
Shao Fei Jiang ◽  
Yin Kong ◽  
Ji Quan Li ◽  
Guo Zhong Chai
Keyword(s):  
Heat Transfer ◽  
Injection Molding ◽  
Temperature Response ◽  
Electric Heating ◽  
High Quality ◽  
Heat Cycle ◽  
Heat Transfer Simulation ◽  
Plastic Injection ◽  
Plastic Products

The demand of high quality for plastic products has facilitated the development of Plastic Injection Molding Technology, many new sorts of methods were created to improve the surface quality of plastic products, such as Rapid Heat Cycle Molding. But the temperature response law hasn’t figured out yet, and the influence elements of this process haven’t been clear, which seriously delay the appliction of Rapid Heat Cycle Molding.

scholarly journals ANALYSIS ON VOLUMETRIC SHRINKAGE OF PLASTIC FOOD CONTAINER MADE FROM AN INJECTION MOLDING PROCESS

2020 ◽  
Vol 8 (2) ◽  
pp. 22-31
Author(s):  
Rosidah Jaafar ◽  
◽  
Hambali Arep ◽  
Effendi Mohamad ◽  
Jeefferie Abd Razak ◽  
...  
Keyword(s):  
Injection Molding ◽  
Process Parameters ◽  
Food Packaging ◽  
Plastic Injection Molding ◽  
Volumetric Shrinkage ◽  
Injection Molding Process ◽  
Molding Process ◽  
Melt Temperature ◽  
Plastic Injection

The plastic injection molding process is one of the widely used of the manufacturing process to manufacture the plastic product with high productivity. Moreover, the food packaging manufacturing industry undergoes the trials and errors to obtain the optimal setting of the process parameters in order to minimize the quality issues and these trials and errors are time consuming and costly. The aim of this study is to improve the quality of the butter tub by minimizing the volumetric shrinkage. This study is to deal with the application of Moldflow integrating with the statistical technique to minimize the volumetric shrinkage the butter tub which depends on the process parameters of the plastic injection molding. For this purpose, the rectangular shape of butter tub is designed by utilizing the SolidWorks. Molflow is used to simulate the plastic filling of the single cavity mold of butter tub based on the Taguchi’s �!" orthogonal array table. In addition, the analysis of variance (ANOVA) is applied to investigate significant impact of the process parameters on the quality of the butter tub. Minitab is used to optimize the response of the volumetric shrinkage by selecting the most appropriate process parameters that maximizing the desirability value. Furthermore, the butter tub has a uniform thickness which was 1.2 mm and its factor of safety was 3.383 and the volumetric shrinkage response have optimized by 0.956 %. The melt temperature and mold temperature are found to be the most significant process parameters for the plastic injection molding process of butter tub and the volumetric shrinkage value obtained from the simulation is verified by the calculated volumetric shrinkage value.

Research on General Model of Hot Runner Mould for Transparent and Complex Plastic Knobs

2009 ◽  
Author(s):  
Xiaohong Ge ◽  
Shaolan Wu ◽  
Hui Li ◽  
Hongwu Huang
Keyword(s):  
Injection Molding ◽  
Product Quality ◽  
General Model ◽  
Extrusion Process ◽  
Injection Mold ◽  
High Quality ◽  
Beryllium Copper ◽  
Manufacturing Efficiency ◽  
Cae Analysis

In order to improve the manufacturing efficiency and product quality of transparent and complex plastic knobs, a hot runner injection mold is introduced in this paper. Based on a shared hot runner system and a module combination of the mold holders, inserts and the beryllium-copper cored cooling components, an effective general model for hot runner injection molding is developed. The beryllium copper insert extrusion process is employed to copy with the requirements of great variety, high quality, low price and short producing cycle for knob products. The results of CAE analysis and production validation for typical knobs and insert extrusion process demonstrate the effectiveness of the newly developed hot runner injection molding and that the product quality fulfill the requirements of real manufacturing process.

scholarly journals Community Waste Plastic Recycling System Through Plastic Injection Molding

2021 ◽  
Vol 335 ◽  
pp. 03009
Author(s):  
Lih Zhang Koo ◽  
Douglas Kum Tien Tong ◽  
Matias Rinne
Keyword(s):  
Injection Molding ◽  
Ventilation System ◽  
Plastic Injection Molding ◽  
Mold Design ◽  
Molding Process ◽  
Melt Flow Rate ◽  
Plastic Properties ◽  
Waste Plastic ◽  
Plastic Injection ◽  
Plastic Products

High demand for plastic worldwide has resulted in increasing environmental pollution. To make the plastic manufacturing process more environmentally friendly, recycling of waste plastic must be considered. In view of this a social enterprise called Me.reka Makerspace aims to use waste plastic to produce recycled plastic products using injection molding. However, injection molding is a complex process. In the past Me.reka experienced numerous failures resulting in defective plastic products and cost wastage. To assist with Me.reka’s objective, this study aimed to recommend a process capable of producing good quality recycled plastic products that meet dimensional accuracy and surface roughness requirements. Literature review done on plastic waste separation techniques, plastic properties testing for injection molding, and ventilation systems. Manual plastic sorting was found to be the best for Me.reka, where it can separate all 7 types of plastics collected by Me.reka with the highest accuracy and efficiency and the lowest cost. The melt flow rate of specific plastic type can determine its compatibility for use in the injection molding machine. Furthermore this study found that the best ventilation system for Me.reka Makerspace’s plastic injection molding facility was the displacement ventilation. It is expected that with the installation of an efficient ventilation system, the hazardous gasses produced during the process will be efficiently expelled thus protecting the health of workers. With regards to injection molding, a mold design was made for a book cover mold by applying the applicable mold design principles. However, this mold was later sent for testing at another facility. A flowerpot mold that had arrived at Me.reka which required immediate testing was tested instead. Through testing, improvements were made to the mold and the molding process by finding out the optimum injection molding temperature for the waste plastic used and the mold sprue diameter required to produce a well formed molding.

scholarly journals RESIN FLOW SIMULATION DURING THE RTM METHOD OF COMPOSITES PRODUCTION

2021 ◽  
Vol 13 (3) ◽  
pp. 125-133
Author(s):  
Pawel Paździor ◽  
◽  
Miroslaw Szczepanik ◽  
Keyword(s):  
Carbon Fiber ◽  
Injection Molding ◽  
Epoxy Resins ◽  
Flow Simulation ◽  
Resin Flow ◽  
Serial Production ◽  
Transfer Molding ◽  
Molding Method ◽  
Plastic Injection

Processes of plastic injection molding are often under analyzes in industry and science. Many of these considerations apply to epoxy resins with additional reinforcement, often with glass or carbon fiber inside the closed mould. The simulations of injection molding processes in the production of composite elements is not as common, as thermoplasts. Hence the idea to carry out the work described in this article. The RTM (Resin Transfer Molding) method is dedicated to serial production with the possibility of producing visual carbon fiber elements for aesthetic reasons. Simulations can help to better refine the products. This allows to take appropriate precautions and solve many issues before implementation. The article presents possible situations that could occur in real conditions. Various shapes models were prepared as basis of the numerical calculations. The analyses highlighting the possible issues were performed. The influence of resin pressure and flow rate on the final product was also considered. The aim was to present the characteristic phenomena and their causes that often occur in reality to technologists working with the RTM. Conclusions related to the work carried out are included. Based on the analyzes and conclusions drawn, it is possible to improve the quality of production processes.

scholarly journals Design of conformal cooling for plastic injection moulding by heat transfer simulation

Polímeros ◽  
2015 ◽  
Vol 25 (6) ◽  
pp. 564-574 ◽  
Author(s):  
Sabrina Marques ◽  
Adriano Fagali de Souza ◽  
Jackson Miranda ◽  
Ihar Yadroitsau
Keyword(s):  
Heat Transfer ◽  
Injection Moulding ◽  
Conformal Cooling ◽  
Plastic Injection Moulding ◽  
Heat Transfer Simulation ◽  
Plastic Injection

Cooling Simulation of External Gas-Assisted Injection Molding

2010 ◽  
Vol 44-47 ◽  
pp. 1607-1611
Author(s):  
Shao Fei Jiang ◽  
Jia Bo Zhang ◽  
Guo Zhong Chai ◽  
Ji Quan Li ◽  
Mao Ying Su
Keyword(s):  
Heat Transfer ◽  
Finite Element Method ◽  
Finite Element ◽  
Injection Molding ◽  
Simulation Method ◽  
Cooling Process ◽  
Packing Pressure ◽  
Method Model ◽  
Different Thickness

This paper present a cooling simulation method for External Gas-assisted Injection Molding (EGAIM). To simulate the cooling process of EGAIM, a Finite Element Method model with heat transfer processing with isotropic materials containing inner heat source was established, and pressure was loaded on the interface of mold and part as gas packing pressure. The simulation was used to explore the effect of process parameters on the quality of an example with different thickness ribs with ANSYS. The results showed the method is feasible and reliable.

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