with time were obtained .16154

Introduction Introduction Introduction Introduction

Plastic injection molding is to inject the melt plastics into the mold, through cooling and curing

methods to form molding products. Barrel temperature of injection molding machine is an

important process parameters . At present, heating method of the barrel of the injection molding

machine is usually resistance heating which fix several resistance heating coils on the out-surface of

barrel, and the temperature of each heating coil can be independently controlled. This paper will

apply the induction heating tec hnology to injection molding machine. Induction heating has many

advantages, such as high heating speed, high barrel internal heating and heating efficiency, uniform

and selective heating, less environmental pollution, well-controlling, safety. Based on t he principle

of induction heating induced current (eddy current) distribution has skin effect in the barrel surface,

that is concentrated in a small range of barrel surface, the barrel temperature is going up by the

internal heat transfer. Induction heati ng is a complex physical process with coupling

electromagnetic field and temperature field. In the heating process magnetic permeability, electrical 源自六-维+论\文"网*加7位QQ3249.114 www.lwfree.cn

conductivity, specific heat capacity and other physical parameters of the barrel material will vary

with t emperature, and these factors in turn, will have an impact on the heating process. In addition,

injection molding machine of induction heating as compared to the present industrial application of

induction heating has its own features:(1) Barrel temperatu re is lower, generally around 200 ℃ ;(2)

Barrel heating time is longer, as the barrel temperature need high precision, in order to facilitate

temperature control, so barrel temperature must rise stably;(3) Lower heating power, lower

frequency and barrel temperature, higher precision of temp erature control and longer heating time

all require an inductor to have appropriate power and frequency. In summary, this paper that

analyzes and studies induction heating process of the barrel of injection molding machine using

ANSYS can optimize design parameters of inductor.

2 2 2 2 Governing Governing Governing Governing equations equations equations equations for for for for electromagnetic electromagnetic electromagnetic electromagnetic field field field field

2.1 2.1 2.1 2.1 Mathematical Mathematical Mathematical Mathematical model model model model of of of of magnetic magnetic magnetic magnetic field field field field

The governing equations for time varying magnetic field analysis can be derived from

Maxwell ’ s equations[1]:ANSYS software uses the method of the magnetic vector potential to calculate electromagnetic field

and eddy current field. Introducing ， is the magnetic vector potential . When the B A = ∇×Where is the prescribed angular frequency. Eq.( 3 ) is the solution of eddy current field of ω

differential equations of the complex vector.

2.2 2.2 2.2 2.2 Mathematical Mathematical Mathematical Mathematical model model model model of of of of temperature temperature temperature temperature field field field field ANSYS的注射机感应加热温度场数值模拟英文文献和中文翻译:http://www.lwfree.cn/fanyi/20171204/17360.html