机械专业文献翻译--微型模具成型的热量和挤压控制(编辑修改稿)

机械专业文献翻译--微型模具成型的热量和挤压控制(编辑修改稿)内容摘要：

t low pressure to keep the flow resistance small,and once the cavity is filled, applies large clamping force on molds to form microstructures. Injection press molding has superb transforming capability used for example, in forming optical disks and LCD light guiding plates. Conventional injection press molding applies large clamping force on molds for forming after the filling process. However, conventional injection press molding process has two problems for forming 机械专业中英文文献翻译 micro parts described above. First, in forming multiple micro parts with a single set of molds, the temperature and rigidity distributions are not uniform causing difference in forming pressure [5, 6]. Generally, the temperature is higher around the mold center and the pressing force is higher around the perimeter. Secondly, even if one tries to flatten the uneven distribution with cooling or pressure control, sensors to monitor the heat flux or pressure are larger than the micro parts and cannot find these conditions within the that measuring heat flux instead of temperature allows monitoring resin solidification in the cavity. The authors of this paper devised mechanisms to (1) individually press each important micro structure area (we call this area the ‘‘core’’) with a moldcore extrusion mechanism equipped with a small piezo element and (2) control pressure temperature, and especially the cavity heat flux for each core by arranging a set of sensors around each core and feeding back the sensor signals to the above piezo element. This paper reports our prototype of these mechanisms. 2 Designing the injection press molding system Figure 1 shows the mold we used. First we describe the moldcore extrusion mechanism design equipped with a piezo element. The piezo element used (KISTLER,Z17294X2) has a maximum free displacement of 13 lm and produces a maximum force of 6 kN with no displacement,thus the pressing force varies between 0 and 6 kN depending on the piezo element extension. The piezo element has a single axis force sensor (KISTLER, 9134A) integrated in it for pressing force feedback control. The piezo element unit size is 25 mm in diameter, 54 mm long and its temperature Fig. 1. Test mold range is )20 to 120oC. The symmetric design of the force transferring structure 机械专业中英文文献翻译 uniformly transfers the pressing force from the piezo element. This cylindrical force transfer mech。