共查询到18条相似文献,搜索用时 62 毫秒
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针对三氯氢硅反应炉电阻加热方式存在的问题,提出采用工频电磁感应的加热方式,并通过试验及实际应用,证实了将工频电磁感应加热方式运用到三氯氢硅反应炉的加热上是完全可行的,而且经济实用. 相似文献
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注塑机机筒加热功率的设计 总被引:2,自引:0,他引:2
论述注塑机机筒加热功率的作用和原理,提出了加热效率的计算模型,对加热功率的设计提出了新的理念,并举例说明了其设计过程。同时对加热圈的结构形式、加热功率与螺杆特性之间的关系进行了探讨,提出了机筒加热功率不够的解决方法。 相似文献
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注塑机螺杆的固体流变分析 总被引:1,自引:0,他引:1
分析了注塑机螺杆工作时加料段塑料颗粒的流动特性,介绍了塞流固体输送理论及非塞流固体输送理论的基本计算方法,并引入压力的计算公式,从而使塞流固体输送流率可直接计算求解。 相似文献
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提供了单控叠模高频开关电源的电磁感应加热在橡塑机械中的一些应用中的涉及的设计计算和观点(包括机筒加热功率的估算、加热线圈的计算方法等),为在行业内节能减排选用这种技术和产品提供了实例。 相似文献
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螺杆是注塑机的核心部件之一,螺杆的设计的好坏直接影响到注塑机的性能,好的螺杆不仅仅具有好的塑化功能,还要求具有好的混色功能。本文从震德公司的工具箱的混色问题出发,先从理论上深入探讨了混合机理,根据理论分析,设计出了具有优异混色功能的混色元件,解决了工具箱的混色问题,理论与实践相结合,深入探讨了注塑机螺杆的混色技术。 相似文献
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注塑成型机是一种重要的塑料加工设备。由于该类设备长期处于连续运转状态,能耗极大,降低注塑成型系统的能耗已经成为今后技术发展方向。通过对注塑成型系统三个主要耗能部分进行分析,介绍了三种节能技术,以期降低注塑成型系统的能耗。 相似文献
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以实例进行注射成型机模板的强度和刚度可靠性设计,介绍了模板以P-S-N近似线图进行疲劳强度计算,按照应力-刚度模型进行刚度可靠性的设计方法,对注射成型机设计有一定的参考价值。 相似文献
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Soohong Kim Ching-Shin Shiau Byung H. Kim 《Polymer-Plastics Technology and Engineering》2013,52(11):1031-1037
During injection molding of micron or submicron scale features, incomplete filling frequently occurs, resulting from premature freezing of the polymer melt in contact with a cold mold. In order to overcome the filling difficulty without increasing the total cycle time, the mold surface temperature was raised rapidly by induction heating. A prototype mold insert with cooling channels was fabricated and integrated with a nickel stamp having nanoscale-grating structures. The nickel stamp surface was successfully heated from 25 to 258°C in 2.7 sec. Four different mold surface temperatures, 100, 150, 200 and 250°C, were tested to determine if the nanograting structures can be replicated with an optical quality cyclic olefin copolymer. Experimental results indicate that the nanocavities were successfully filled when the surface temperature reached 250°C, but mold release caused drag damages on the nanogratings. Further, coupled thermoelectromagnetic analyses were carried out to simulate the induction heating process of the nanostructured mold insert. The predicted surface temperature responses in general agree with the experimental ones and the simulation model can be used in the further development of process control and mold design in micro/nano molding. 相似文献
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Fully-Coupled Numerical Analysis of High-Frequency Induction Heating for Thin-Wall Injection Molding
Hyeju Eom 《Polymer-Plastics Technology and Engineering》2013,52(10):1070-1077
In recent years, rapid mold heating has served to enable the injection molding of thin-walled parts or micro/nano structures. Induction heating is an efficient way to heat metal parts by means of an electric current that flows through a conductive material by electromagnetic induction. The present study covers a numerical investigation of high-frequency induction heating of an injection mold in order to rapidly raise the mold temperature. To take into account the effects of thermal boundary conditions of induction heating, a fully coupled numerical analysis effectively connecting electromagnetic field calculation, heat transfer analysis, and injection molding simulation was carried out. The proposed integrated simulation was applied to the injection molding of a thin-wall part, and its results were compared with experimental findings in order to verify the validity of the proposed simulation. 相似文献