摘要
提出了蒸汽直接加热模具型腔表面的高光注塑新方法,研制了蒸汽直接加热模具型腔的高光注塑模具及模具温度控制机。该装置将高温蒸汽直接通入模腔,使模腔表面达到所需的温度,然后通入高温干空气,吹除模腔内残留的冷凝水,再注射、保压、冷却、开模,完成一个注塑周期。该方法使动定模模面得到均匀加热,熔融料前锋温度和速度高,且只加热模面以下1～2 mm的模芯,能有效地缩短加热和冷却时间。结果表明,该技术能够有效地解决塑料件的熔接痕、流痕、翘曲、缩水、尺寸变形等缺陷,使塑料件获得极高的表面粗糙度等级,且节省热能,降低相关的模具制造成本。
A novel high-gloss injection method which the mold cavity was heated by steam directly was presented,the related high-gloss mold and special high-gloss mold temperature controller was developed.By this machine,the high-temperature steam was input the mold cavity for several seconds and the surface of mold cavity gained the demandable temperature,then the high-temperature dry air was switched to the mold cavity for blowing off residual condensation water on the surface of mold cavity.Subsequently,a cycle of injection molding was completed,including injection,packing,cooling,and mold opening.Surface of fixed and moving half molds were heated evenly by this method,the speed and temperature of the front of molten plastic were very high,and the metal of mold cores with depth of only 1–2？mm from mold surfaces was heated,so the method greatly shortened the heating and cooling time.The experimental results showed that the surface defects of plastic parts were improved effctively such as welding mark,flow mark,warping,craters,size deformation,et al.And extreme high grade of surface roughness was obtained,the technology also reduced heat energy consumption and saved mold manufacturing costs.
出处
《工程塑料应用》
CAS
CSCD
北大核心
2011年第12期35-38,共4页
Engineering Plastics Application
基金
国家自然科学基金项目(60978039)
关键词
蒸汽直接加热模腔
高光注塑模具
高光模温机
注塑工艺
direct steam heating mold cavity
high-gloss injection mold
high-gloss mold temperature controller
injection technology
