辊式涂布两辊间隙施涂过程的数值计算分析-包装工程.PDF

包 装 工 程 第 37 卷 第 23 期 ·6 · PACKAGING ENGINEERING 2016 年 12 月 辊式涂布两辊间隙施涂过程的数值计算分析 包能胜 1 ，刘小山 1 ，马婉 1 ，黄学佳 2 （1.汕头大学汕头 515063 ；2.汕头职业技术学院，汕头 515063 ） 摘要： 目的 系统地计算涂层厚度与两辊间隙、涂布辊速度以及胶黏剂的流体稠度和流动指数等影 响因子的关系。方法 在分析该复杂流动机理的基础上，利用 CFD 软件对具有非牛顿流体特性胶黏 剂的两辊间隙施涂过程进行二维数值模拟。结果 在五辊无溶剂涂布工程中，两辊间隙增大，最终 涂布厚度也明显增大；增大涂布辊转速，涂布厚度也将减小；胶黏剂的流体稠度越大，最终传递到 基材上的涂层厚度减小。结论 两辊间隙的大小对涂层厚度的影响最大，胶黏剂的流体稠度、流动 指数也对涂层厚度有较大的影响。 关键词：五辊无溶剂涂布；非牛顿流体；两辊间隙；施涂过程；数值计算；CFD 中图分类号：TP391.9 文献标识码：A 文章编号：1001-3563(2016)23-0006-07 Numerical Calculation and Analysis on Roll Coating Process of the Clearance between Two Rollers 1 1 1 2 BAO Neng-sheng , LIU Xiao-shan , MA Wan , HUANG Xue-jia (1.Shantou University, Shantou 515063, China; 2.Shantou Polytechnic, Shantou 515063, China) ABSTRACT: The work aims to systematically calculate the relationship between coating thickness and such influencing factors as the clearance between two rollers, speed for coating rolls, and fluid consistency and flow index of adhesive. Based on the analysis on the complicated flow mechanism, the 2D numerical simulation for the process of coating the clearance between two rollers with adhesive characterized by non-Newtonian fluid through CFD software was carried out. In the five-roller solvent-free coating project, the coating thickness finally increased notably with the increase in the clearance between two rollers. The coating thickness woul