Characterization Methods of Nano-Patterned Surfaces Generated by Induction Heating Assisted Injection Molding

2015 ◽  
Vol 9 (4) ◽  
pp. 349-355
Author(s):  
Stefano Menotti ◽  
◽  
Giuliano Bissacco ◽  
Hans Nørgaard Hansen ◽  
Peter Torben Tang ◽  
...  
Keyword(s):  
Injection Molding ◽  
Induction Heating ◽  
Process Condition ◽  
Heating System ◽  
Patterned Surfaces ◽  
Quantitative Characterization ◽  
Characterization Methods ◽  
Replication Quality

An induction heating-assisted injection molding (IHAIM) process developed by the authors is used to replicate surfaces containing random nano-patterns. The injection molding setup is developed so that an induction heating system rapidly heats the cavity wall at rates of up to 10°C/s. In order to enable the optimization of the IHAIM process for nano-pattern replication, it is necessary to develop robust methods for quantitative characterization of the replicated nano-patterns. For this purpose, three different approaches for quantitative characterization of random nano-patterns are applied and compared. Results show that the use of IHAIM is an efficient way to improve replication quality. All three measurement methods are capable of detecting the trend of the replication quality of the surface changing the process condition.

scholarly journals Quali/quantitative characterization of biogas produced in batch digesters supplied with six distinct substrates

2011 ◽  
Vol 31 (4) ◽  
pp. 795-802 ◽  
Author(s):  
João A. Galbiatti ◽  
Anaira D. Caramelo ◽  
Denise A. Chiconato ◽  
José R. Araújo ◽  
Eliana A. B. Girardi
Keyword(s):  
Biogas Production ◽  
State University ◽  
Quantitative Characterization ◽  
Broiler Litter ◽  
Paulo State ◽  
Wood Shavings ◽  
Peanut Hulls ◽  
Peanut Hull

The present research was carried out at the DER/FCAV, São Paulo State University - Brazil, with the purpose of analyzing the quantity and quality of biogas produced by six types of substrates. The substrates used in the anaerobic digestion were characterized as: 1- Litter of broiler (LB); 2- Grinded broiler litter (GBL); 3- Broiler litter with wood shavings (BLWS); 4- Grinded broiler litter with wood shavings (GBLWS); 5- Broiler litter with peanut hulls (BLPH); 6- Grinded broiler litter with peanut hull (GBLPH). It was concluded from the collected data that: the (GBL) substrate showed a superior biogas accumulated production in relation to the other substrates, while the BLWS presented an inferior accumulated production; the grinded substrates showed higher quantities of accumulated biogas in relation to the non-grinded substrates, except for GBLPH, with 20.9 m³ inferior than BLPH; the period of maximum biogas production started from 45 to 60 days, declining after 120 days; at 57 days after filling up the digesters the biogas produced had levels of CH4 superior than 53%, and from 99 days all of them produced biogas with levels of CH4 superior than 70%; LB and GBL presented higher concentrations of CH4 in the biogas.

scholarly journals Morphometric and quantitative characterization of atrial ganglion neurons from the intercaval region in dogs with dilated cardiomyopathy

2007 ◽  
Vol 59 (6) ◽  
pp. 1394-1399
Author(s):  
A.A. Camacho ◽  
R. Oliveira-Alves ◽  
R.P. Klein ◽  
M.G. Sousa
Keyword(s):  
Dilated Cardiomyopathy ◽  
Neural Control ◽  
Ventricular Myocardium ◽  
Quantitative Characterization ◽  
Histologic Evaluation ◽  
Ganglion Neurons

The quantity, morphometry, and quality of atrial neurons from the intercaval region in dogs with dilated cardiomyopathy (DCM) were evaluated. Dogs with DCM had greater ganglion neurons than control dogs. The histologic evaluation of the ventricular myocardium and ganglion neurons confirmed DCM and showed the degeneration of ganglion neurons. Dogs with chronic DCM had a secondary cardioneuropathy owing to impaired parasympathetic neural control.

scholarly journals Investigation on Product and Process Fingerprints for Integrated Quality Assurance in Injection Molding of Microstructured Biochips

2018 ◽  
Vol 2 (4) ◽  
pp. 79
Author(s):  
Nikolaos Giannekas ◽  
Yang Zhang ◽  
Guido Tosello
Keyword(s):  
Injection Molding ◽  
Quality Monitoring ◽  
Efficient Production ◽  
Replication Fidelity ◽  
Part Quality ◽  
Replication Quality ◽  
Micro Features ◽  
Product And Process ◽  
Plastic Parts

Injection molding has been increasing for decades its share in the production of polymer components, in comparison to other manufacturing processes, as it can assure a cost-efficient production while maintaining short cycle times. In any production line, the stability of the process and the quality of the produced components is ensured by frequently performed metrological controls, which require a significant amount of effort and resources. To avoid the expensive effect of an out of tolerance production, an alternative method to intensive metrology efforts to process stability and part quality monitoring is presented in this article. The proposed method is based on the extraction of process and product fingerprints from the process regulating signals and the replication quality of dedicated features positioned on the injection molded component, respectively. The features used for this purpose are placed on the runner of the moldings and are similar or equal to those actually in the part, in order to assess the quality of the produced plastic parts. For the purpose of studying the method’s viability, a study case based on the production of polymer microfluidic systems for bio-analytics medical applications was selected. A statistically designed experiment was utilized in order to assess the sensitivity of the polymer biochip’s micro features (μ-pillars) replication fidelity with respect to the experimental treatments. The main effects of the process parameters revealed that the effects of process variation were dependent on the position of the μ-pillars. Results showed that a number of process fingerprints follow the same trends as the replication fidelity of the on-part μ-pillars. Instead, only one of the two on-runner μ-pillar position measurands can effectively serve as product fingerprints. Thus, the method can be the foundation for the development of a fast part quality monitoring system with the potential to decrease the use of off-line, time-consuming detailed metrology for part and tool approval, provided that the fingerprints are specifically designed and selected.

scholarly journals Analysis of induction heating system for high frequency welding

2012 ◽  
Vol 25 (3) ◽  
pp. 183-191 ◽  
Author(s):  
Ilona Iatcheva ◽  
Georgi Gigov ◽  
Georgi Kunov ◽  
Rumena Stancheva
Keyword(s):  
Induction Heating ◽  
High Frequency ◽  
Three Dimensional ◽  
Welding Process ◽  
Heating System ◽  
Time Harmonic ◽  
Transient Thermal ◽  
Induction Heating System ◽  
Estimate System

The aim of the work is the investigation of induction heating system used for longitudinal, high frequency pipe welding.Coupled electromagnetic and temperature field distribution has been studied in order to estimate system efficiency and factors influencing the quality of the welding process and required energy. The problem was considered as three dimensional. Time harmonic electromagnetic and transient thermal field has been solved using finite element method and COMSOL 4.2 software package.

Estimate the Melt Flow Length with Internal Induction Heating for the Injection Molding Process

2020 ◽  
Vol 863 ◽  
pp. 97-102
Author(s):  
Huynh Duc Thuan ◽  
Tran Anh Son ◽  
Pham Son Minh
Keyword(s):  
Temperature Distribution ◽  
Injection Molding ◽  
Heating Rate ◽  
Induction Heating ◽  
Heating System ◽  
Mold Temperature ◽  
Heating Process ◽  
Injection Molding Process ◽  
Molding Process ◽  
Internal Induction

In this paper, an induction heating system was applied to the heating stage in the injection molding process. Through simulation and experiment, the heating process was estimated by the temperature distribution and the heating rate. In the simulation, the mold temperature was increased from 30°C to 180°C in 9 s. Therefore, the heating rate was higher than 16°C/s, which represents a positive result in the field of mold heating. Additionally, the temperature distribution revealed that the higher temperature is concentrated on the gate area, while the outside of the mold cavity is at a lower temperature. The same parameters were applied to both the experiment and the simulation, and the results were in good agreement.

Development of Barrel Heating via Induction in Injection Molding Machine

2015 ◽  
Vol 764-765 ◽  
pp. 249-253
Author(s):  
Huy Tien Bui ◽  
Sheng Jye Hwang
Keyword(s):  
Temperature Distribution ◽  
Injection Molding ◽  
Induction Heating ◽  
Heating System ◽  
Resistance Heating ◽  
Molding Machine ◽  
Injection Molding Machine ◽  
Heating Systems ◽  
Induction Heating System ◽  
Current Resistance

A barrel heating system will be developed by using induction heating instead of current resistance heating. The experiment results showed the induction heating system can change successfully the current resistance heating system in heated the barrel of injection molding machine. A working coil coupled with magnetic concentrator bars was also considered. Finally, the uniformity of temperature distribution is compared between two barrel heating systems.

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