Research of thermal response simulation and mold structure optimization for rapid heat cycle molding processes, respectively, with steam heating and electric heating

2010 ◽  
Vol 31 (1) ◽  
pp. 382-395 ◽  
Author(s):  
Guilong Wang ◽  
Guoqun Zhao ◽  
Huiping Li ◽  
Yanjin Guan
Keyword(s):  
Thermal Response ◽  
Structure Optimization ◽  
Electric Heating ◽  
Heat Cycle ◽  
Steam Heating

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.

Analysis of Hybrid Electric/Thermofluidic Control for Wet Shape Memory Alloy Actuators

2009 ◽  
Author(s):  
Leslie Flemming ◽  
Stephen Mascaro
Keyword(s):  
Control Strategies ◽  
Fluid Dynamic ◽  
Thermal Response ◽  
Electric Heating ◽  
Electrical Heating ◽  
Linear Contraction ◽  
Heating And Cooling ◽  
The Wire ◽  
Temperature Strain ◽  
Strain Model

A wet SMA actuator is characterized by an SMA wire embedded within a compliant fluid-filled tube. Heating and cooling of the SMA wire produce a linear contraction and extension of the wire. Thermal energy can be transferred to and from the wire using combinations of resistive heating and free/forced convection using hot and cold fluid. The goal of this paper is to analyze the speed and efficiency of wet SMA actuators using a variety of control strategies involving different combinations of electrical and thermofluidic inputs. A computational fluid dynamic model is used in conjunction with a temperature-strain model to simulate the thermal response of the wire and compute strains, contraction/extension times and efficiency. The simulations produce cycling rates of up to 5 Hz for electrical heating and fluidic cooling, and up to 2 Hz for fluidic heating and cooling. The results demonstrate efficiencies up to 0.5% for electric heating and up to 0.2% for fluidic heating.

Development of an Efficient Thermal Transfer Structure in Rapid Heat Cycle Molding

2011 ◽  
Vol 181-182 ◽  
pp. 1025-1030
Author(s):  
Zeng Wei Fan ◽  
Xiao Hong Ge ◽  
Hong Wu Huang ◽  
Hui Li
Keyword(s):  
Energy Consumption ◽  
High Surface ◽  
Thermal Response ◽  
Mold Insert ◽  
Heating Time ◽  
Heat Cycle ◽  
High Surface Quality ◽  
Thermal Transfer ◽  
Novel Structure ◽  
Transfer Structure

The efficiency of the orientation thermal transfer is the key in rapid heat cycle molding (RHCM) technology, because it significantly affects the energy consumption, productivity and the quality of the final polymer parts. Therefore, the thermal response of the integral mold insert in SRHCM process has been simulated by ANSYS, and a novel thermal transfer structure in the form of combined mold insert with insulation layer has been developed to reduce the energy waste. The milled U-grooves act as thermal transfer channels in this structure, which can be manufactured conveniently to obtain high surface quality easily. The simulation results show that the novel structure can save energy consumption evidently, that the heating time is reduced by 35.7 percent, and that the cooling time is reduced by 24.9 percent compared with the unmodified one.

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