基于响应面法的血液透析继手挤出吹塑壁厚优化  

Optimization of Wall Thickness of Hemodialysis Joint Based on Response Surface Method

作　　者：毛欣然 刘淑梅[1] 胡祚庥 康浩伦 洪磊 MAO Xinran;LIU Shumei;HU Zuoxiu;KANG Haolun;HONG Lei(School of Materials Engineering,Shanghai University of Engineering Science,Shanghai 201620,China)

机构地区：[1]上海工程技术大学材料工程学院,上海201620

出　　处：《塑料》2022年第3期122-127,共6页Plastics

摘　　要：血液透析继手作为医用耗材,需求量较大,成型质量要求较高。为解决血液透析继手吹塑过程中壁厚不均的问题,采用Polyflow软件对继手的吹胀成型过程进行数值模拟。基于响应面法分析了预吹压力、吹胀压力和吹胀时间3个影响制品壁厚的成型工艺参数,以制品壁厚均匀度作为优化目标,得到最佳工艺参数组合,并进行模拟验证。基于实际工艺情况进行了口模间隙预测,减小重力对挤出型坯壁厚的影响,最后,通过实际生产证明模拟结果的有效性。结果表明,当预吹压力为1536.75 Pa、吹胀压力为60000 Pa和吹胀时间为7.52 s时,制品平均壁厚为0.967 mm、最小壁厚为0.507 mm、壁厚均匀度为0.03757。工艺改进后的产品成型质量较好,壁厚分布均匀。As medical consumables,the hemodialysis joint had a large demand and high molding quality requirements.In order to solve the problem of uneven wall thickness in blow molding process,the process was numerically simulated by Polyflow software.The response surface method was used to analyze the three molding process parameters which affect the wall thickness of the product,including pre blowing pressure,blowing pressure and blowing time.Taking the uniformity of product wall thickness as the optimization objective,the best combination of process parameters was obtained and verified by simulation.Based on the actual process,the die gap was predicted to reduce the influence of gravity on the parison wall thickness.Finally,the effectiveness of the simulation results was verified by actual production.The results showed that the average wall thickness was 0.967 mm,the minimum wall thickness was 0.507 mm and the uniformity of wall thickness was 0.03757 when the pre blowing pressure was 1536.75 Pa,the blowing pressure was 60000 Pa and the blowing time was 7.52 s.The product with improved technology had good quality and uniform wall thickness distribution.

关 键 词：挤出吹塑 POLYFLOW 数值模拟 响应面实验 工艺优化 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]