Development of barrel heating system in injection molding machine via induction heating

2015 ◽  
Vol 21 (3) ◽  
pp. 244-249 ◽  
Author(s):  
Huy-Tien Bui ◽  
Sheng-Jye Hwang
Keyword(s):  
Temperature Distribution ◽  
Magnetic Flux ◽  
Induction Heating ◽  
Heating System ◽  
Resistance Heating ◽  
Uniform Temperature ◽  
Content Type ◽  
Uniform Temperature Distribution ◽  
Proper Design ◽  
Induction Heating System

Purpose – The purpose of this paper is to develop a barrel heating system using induction heating instead of resistance heating. And, a working coil for the induction heating system was designed so that the barrel has uniform temperature distribution. Design/methodology/approach – A coupling design combining the pitch of turns of working coil with the magnetic flux concentrators in the barrel induction heating system was developed to achieve uniform temperature distribution which was approximately the same as temperature uniformity obtained from that of resistance heating system. Findings – In contrast to resistance heating method, induction heating is more efficient because the heating is directly applied on the work-piece. Its heating rate is higher than that of resistance heating method. However, the uneven temperature distribution in the barrel is the main disadvantage of the induction heating system. But, with proper design of adjusting the pitch of turns at the center of working coil and adding magnetic flux concentrators at areas with lower magnetic flux, the barrel heating system via induction can achieve temperature distribution uniformity. Originality/value – Under proper design of working coil, the barrel heating system by induction method can achieve the same uniform temperature distribution as the barrel heated by resistance method, and could be practically used in an injection molding machine.

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.

Embedded resistive heating in composite scarf repairs

2016 ◽  
Vol 51 (18) ◽  
pp. 2575-2583 ◽  
Author(s):  
Mahdi Ashrafi ◽  
Brandon P Smith ◽  
Santosh Devasia ◽  
Mark E Tuttle
Keyword(s):  
Temperature Distribution ◽  
Outer Surface ◽  
Thermal Gradient ◽  
Thermal Damage ◽  
Electrical Current ◽  
Tensile Tests ◽  
Resistance Heating ◽  
Uniform Temperature ◽  
Uniform Temperature Distribution ◽  
Bond Strengths

Composite scarf repairs were cured using heat generated by passing an electrical current through a woven graphite-epoxy prepreg embedded in the bondline. Resistance heating using the embedded prepreg resulted in a more uniform temperature distribution in the bondline while preventing any potential thermal damage to the surface of the scarf repairs. In contrast, conventional surface heating methods such as heat blankets or heat lamps lead to large through thickness thermal gradient that causes non-uniform temperature in the bondline and overheating the outer surface adjacent to the heater. Composite scarf repair specimens were created using the proposed embedded heating approach and through the use of a heat blanket for circular and rectangular scarf configurations. Tensile tests were performed for rectangular scarf specimens, and it was shown that the bond strengths of all specimens were found to be comparable. The proposed embedded curing technique results in bond strengths that equal or exceed those achieved with external heating and avoids overheating the surface of the scarf repairs.

scholarly journals Industrial heating system creating given temperature distribution

2008 ◽  
Vol 5 (1) ◽  
pp. 57-66 ◽  
Author(s):  
Ilona Iatcheva ◽  
Ilonka Lilianova ◽  
Hristophor Tahrilov ◽  
Rumena Stancheva
Keyword(s):  
Temperature Distribution ◽  
Induction Heating ◽  
Heating System ◽  
Field Analysis ◽  
The Finite Element Method ◽  
Optimization Task ◽  
Surface Method ◽  
Nonlinear Transient ◽  
Industrial Heating ◽  
Induction Heating System

The aim of the work is precise coupled electromagnetic-temperature field analysis using the finite element method of an induction heating system and creation of adequate field models at chosen control points. The obtained models have been applied in an optimization task, concerning special requirements for temperature distribution in the heated detail. The field analysis problem was solved as nonlinear, transient and axisymmetrical. The field models used in the optimization problem were based on the Response surface method and Design of experiment. The presented example refers to a real induction heating system. Heated details after plastic deformation and hardening are used for producing farm instruments.

Optimal design methods for the uniform heating of tube ends for stress relieving

2020 ◽  
Vol 39 (1) ◽  
pp. 12-20
Author(s):  
Alexander Aliferov ◽  
Paolo Di Barba ◽  
Fabrizio Dughiero ◽  
Michele Forzan ◽  
Sergio Lupi ◽  
...  
Keyword(s):  
Induction Heating ◽  
Heating System ◽  
Optimization Methods ◽  
Steel Tube ◽  
Genetic Optimization ◽  
Uniform Heating ◽  
Content Type ◽  
Design Variables ◽  
Stress Relieving ◽  
Induction Heating System

Purpose An inductor for the uniform heating of the extremity of a ferromagnetic steel tube for stress relieving is considered. The main goal of the study is to investigate the possibility to achieve a reasonable design of the inductor when dealing with many design variables. Design/methodology/approach Genetic optimization algorithms are used for this purpose, demonstrating the applicability of these techniques to the design of induction heating inductors. Genetic algorithms provide to the designer several optimal solutions belonging to Pareto Front, and this way they allow choosing the solution that better fits the technological requirements. In any case, the designer has to adapt the chosen solution to fit in with the real possibilities in industrial application. Findings The study demonstrates that automatic optimization methods may help the designer of the induction heating system to solve complex problems with very conflicting technological requirements. Originality/value In the paper, a problem with a high number of design variables is solved. Moreover, the goals of the optimization process are strongly conflicting, and the proposed problem is a challenging one.

scholarly journals Velocity-Controlled Particle Swarm Optimization (PSO) and Its Application to the Optimization of Transverse Flux Induction Heating Apparatus

Energies ◽  
2019 ◽  
Vol 12 (3) ◽  
pp. 487 ◽  
Author(s):  
Youhua Wang ◽  
Bin Li ◽  
Liuxia Yin ◽  
Jiancheng Wu ◽  
Shipu Wu ◽  
...  
Keyword(s):  
Particle Swarm Optimization ◽  
Temperature Distribution ◽  
Induction Heating ◽  
Particle Swarm ◽  
Support Vector ◽  
Uniform Temperature ◽  
Swarm Optimization ◽  
Uniform Temperature Distribution ◽  
Transverse Flux ◽  
Better Than

The main disadvantage of transverse flux induction heating (TFIH) is its resulting non-uniform temperature distribution on the surface of the strip at the inductor outlet. For obtaining a uniform temperature distribution, an improved particle swarm optimization (PSO) named velocity-controlled PSO (VCPSO) is proposed and applied to optimize this problem. Support vector machine (SVM) is adopted to establish a regression model to replace the complex and time-consuming coupling calculation process involved in TFIH problem. Simulation results of several test functions show that VCPSO performs much better than standard PSO (SPSO). Moreover, based on the existing research and experiments, the application of VCPSO combined with SVM to the TFIH problem achieves satisfactory results.

Performance of 450 kW permanent magnet heater for aluminum billets

2019 ◽  
Vol 39 (1) ◽  
pp. 206-212
Author(s):  
Michele Forzan ◽  
Fabrizio Dughiero ◽  
Sergio Lupi ◽  
Marcello Zerbetto
Keyword(s):  
Permanent Magnet ◽  
Induction Heating ◽  
High Efficiency ◽  
New Technology ◽  
Heating System ◽  
Paper Briefly ◽  
Content Type ◽  
Life Project ◽  
Induction Heating System ◽  
Eu Commission

Purpose The purpose of this paper is to present the main experimental results obtained on the first prototype of an innovative induction heating system. MAGNHEAT was a LIFE project, funded by EU Commission, proposed to demonstrate the possibility of industrial application of a new technology for the induction heating of aluminum billets before extrusion. This technology uses permanent magnet heaters (PMHs), which constitute a high efficiency solution for the heating of high conductive metals. Design/methodology/approach The paper briefly describes the main steps of the project: the design of the PMH, the realization and installation of the demonstrator on an extrusion production line of Pandolfo Alluminio SpA and, mostly, the performance of the system. Findings The main results achieved during the preliminary tests on an industrial line have been summarized by evaluating some key performance indicators, as reported in the paper. Originality/value The new technology allows a significant reduction of the energy consumption and guarantees the same performance of a classical induction heater.

Design of an induction heating coil coupled with magnetic flux concentrators for barrel heating of an injection molding machine

2014 ◽  
Vol 229 (3) ◽  
pp. 518-527 ◽  
Author(s):  
Huy-Tien Bui ◽  
Sheng-Jye Hwang
Keyword(s):  
Temperature Distribution ◽  
Injection Molding ◽  
Magnetic Flux ◽  
Heating Rate ◽  
Induction Heating ◽  
Heating Time ◽  
Resistance Heating ◽  
Molding Machine ◽  
Heating Method ◽  
Heating Coil

In an injection molding machine, the conventional barrel heating system which uses resistance heating method (RH) has some drawbacks such as low heating rate, long heating time, and energy loss. With induction heating (IH) technique, the barrel can better handle almost all of these disadvantages. However, non-uniform temperature distribution on inside surface of a barrel is the main drawback of induction heaters. A working coil coupled with magnetic flux concentrators via adjustment of magnetic flux concentrator spacing to achieve uniformity of magnetic flux and temperature distribution on the inside surface of a barrel was proposed and experimented. Results showed that, when barrel was heated by induction heating method with the proposed induction heating coil, heating time to reach a specific temperature could be reduced, and heating rate increased compared to resistance heating method. With 8 mm pitch of magnetic flux concentrators on a coil, the temperature distribution was the most uniform.

Influence of firing process quality on dielectric constant of microwave LTCC substrates

2014 ◽  
Vol 31 (3) ◽  
pp. 169-175 ◽  
Author(s):  
Beata Barteczka ◽  
Piotr Slobodzian ◽  
Arkadiusz Dabrowski ◽  
Leszek Golonka
Keyword(s):  
Dielectric Constant ◽  
Temperature Distribution ◽  
Electrical Properties ◽  
Firing Process ◽  
Uniform Temperature ◽  
Content Type ◽  
Uniform Temperature Distribution ◽  
Microwave Applications ◽  
The Impact ◽  
Rf Microwave

Purpose – The purpose of this paper was to investigate the influence of non-uniform temperature distribution inside a box furnace during the firing process on electrical properties of the low-temperature co-fired ceramic (LTCC) materials used in radio frequency (RF)/microwave applications. Design/methodology/approach – The authors studied the change in dielectric constant of two popular LTCC materials (DP 951 and DP 9K7) depending on the position of their samples inside the box furnace. Before firing of the samples, temperature distribution inside the box furnace was determined. The dielectric constant was measured using the method of two microstrip lines. Findings – The findings showed that non-uniform temperature distribution with spatial difference of 6°C can result in 3-4 per cent change of the dielectric constant. It was also found that dielectric constant of the two tested materials shows disparate behavior under the same temperature distribution inside the box furnace. Practical implications – The dielectric constant of the substrate materials is crucial for RF/microwave applications. Therefore, it was shown that 3-4 per cent deviation in dielectric constant can result in considerable detuning of microwave circuits and antennas. Originality/value – To the best of the authors’ knowledge, the quantitative description of the impact of temperature distribution inside a box furnace on electrical properties of the LTCC materials has never been published in the open literature. The findings should be helpful when optimizing production process for high yield of reliable LTCC components like filters, baluns and chip antennas.

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