During the injection molding process,there existed a risk of premature mold opening due to the influence of cavity pressure,which had a significant impact on the quality of plastic product formation.A comprehensive investigation was conducted using both all-electric and hydraulic injection molding machines to examine the effects of mold clamping force magnitude and holding pressure variations on the characteristics of mold separation during the injection molding process.Experimental results indicated that changes in process parameters had an impact on the characteristics of mold separation,encompassing the profiles of clamping force,expansion force,and pressure distribution at the parting surface.When the set clamping force fell below 400 kN,products exhibited the undesirable defect of flash,resulting in a minimum pressure of 0 at the parting surface.Correlation analysis revealed a strong relationship between variations in parting surface pressure and the minimum pressure at the parting surface with product quality,with correlation coefficients of 0.978 and-0.961.Both variations and the minimum pressure in parting surface pressure were found to be indicative of product quality and could serve as monitoring parameters for determining the optimal mold clamping force settings,ultimately a foundation was provided for establishing the best practices in mold clamping force configuration.
关键词
胀模特性/胀模量/分型面压力/锁模力优化/制品质量表征
Key words
characteristics of mold separation/mold separation/parting surface pressure change/parting surface pressure minimum value/characterization of product quality
维普
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