Abstract: In printing processes， printing ink temperature and viscosity had a great influence on the printing quality. Based on the thermal elastohydrodynamic lubrication， the energy of the ink layer， the thickness of the intermediate layer and the temperature of the ink layer in the contact areas of the two ink rollers were calculated by using MATLAB. The distribution of ink temperature was studied at different locations along the contact zones between the layer thickness of a soft and a hard ink roller. The effects of loads, roll speeds and the ink materials on the maximum temperature of the intermediate layers were studied. The results show that the temperature of the intermediate layer ink is the highest at the different positions along the thickness direction of the intermediate， and the temperature is lower near the two rollers. With the increases of the loads， the maximum temperature rise of the intermediate layer increases. With the increases of the roll speeds， the temperature of the intermediate layer of the contact zones between the two rolls is not changed greatly. With the increase of the elastic modulus of the soft roll， the temperature rise of the intermediate layer is increasing.

Key words: offset printing, thermal elastohydrodynamic lubrication, temperature, ink, viscosity

摘要： 印刷过程中，印刷油墨的温度和黏度对印刷质量有较大的影响。基于热弹流润滑理论，应用MATLAB计算了两墨辊接触区内的油墨墨层压力、中心墨层厚度及油墨层的温度分布，研究了印刷油墨在一软一硬两墨辊接触区内沿墨层厚度方向不同位置处的油墨温度分布，以及载荷、对滚速度和墨辊材料对油墨中间层最大温升的影响。结果表明：受热传导的影响，沿墨层厚度方向的不同位置处，中间层油墨温度最高，越靠近两墨辊处温度越低；随着载荷的增大，油墨中间层最大温升增加；随着两辊对滚速度的增加，两辊接触区油墨中间层的温度变化不大；随着软辊弹性模量的增加，两辊接触区油墨中间层的温升逐渐增加。

关键词: 胶印, 热弹流润滑, 温度, 油墨, 黏度