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1. 发明授权

US5785247A Gas injection nozzle for gas assisted injection molding 失效
标题翻译：用于气体辅助注射成型的气体喷嘴
公开(公告)号：US5785247A
公开(公告)日：1998-07-28
申请号：US498367
申请日：1995-07-05
申请人： Yung-Chih Chen , Wen-Liang Liu , Long-Cheng Cheng
发明人： Yung-Chih Chen , Wen-Liang Liu , Long-Cheng Cheng
IPC分类号： B29C45/17 , B29C45/23
CPC分类号： B29C45/1734 , B29C2045/1739
摘要： An improved gas injection nozzle for use in gas-assisted injection molding process is disclosed. The improved gas injection nozzle comprises: (a) a nozzle body, and a nozzle cap fixedly connected to the nozzle body; (b) a gas inlet provided in the nozzle body so as to allow gas to be injected into a mold cavity via a gas channel formed inside both the nozzle body and the nozzle cap; (c) a heating coil provided on the gas injection nozzle; and (d) at least one circumferential groove formed on the outer surface of the nozzle cap. The circumferential groove formed on the outer surface of the nozzle cap preferably has the shape of a spiral groove, with a depth between about 0.2 mm and about 0.5 mm and a length between about 50 mm and about 150 mm. The combination of the heating coil and the circumferential groove prevents the formation of micro cracks that are often formed in the interstices between the nozzle cap and the sprue bushing during the cooling stage of injection molding process. These micro cracks allow passageways to be developed for the inert gas to be leaked out and a fall-off of the gas pressure inside the mold cavity, resulting in sinks and/or warpages to be formed on the injection molded product. The prevention of gas leakage also eliminates the need for continuous gas and thus reduces the manufacturing cost.
摘要翻译：公开了一种用于气体辅助注射成型工艺的改进的气体注入喷嘴。改进的气体喷射喷嘴包括：（a）喷嘴体和固定地连接到喷嘴体的喷嘴盖; （b）设置在所述喷嘴体中的气体入口，以便通过形成在所述喷嘴体和所述喷嘴盖内部的气体通道将气体注入到模腔中; （c）设置在气体注入喷嘴上的加热线圈; 和（d）形成在喷嘴盖的外表面上的至少一个周向凹槽。形成在喷嘴盖的外表面上的圆周槽优选具有螺旋槽的形状，深度在约0.2mm至约0.5mm之间，长度在约50mm至约150mm之间。加热线圈和周向沟槽的组合防止了在注射成型过程的冷却阶段期间经常形成在喷嘴盖和浇道套管之间的间隙中的微裂纹。这些微裂纹允许通道被开发以使惰性气体泄漏出来并使模腔内的气体压力下降，导致在注模产品上形成沉陷和/或翘曲。防止气体泄漏也消除了对连续气体的需要，从而降低制造成本。

2. 发明授权

US08559660B2 Electrostatic electroacoustic transducers 有权
标题翻译：静电电声换能器
公开(公告)号：US08559660B2
公开(公告)日：2013-10-15
申请号：US11776555
申请日：2007-07-12
申请人： Dar-Ming Chiang , Yan-Ren Chen , Long-Cheng Cheng , I-Chen Lee
发明人： Dar-Ming Chiang , Yan-Ren Chen , Long-Cheng Cheng , I-Chen Lee
IPC分类号： H04R25/00
CPC分类号： H04R19/01
摘要： An electrostatic electroacoustic device comprising a first electrode configured to receive an audio signal, a second electrode configured to receive the audio signal, a first electret between the first electrode and the second electrode, the first electret including at least one dielectric layer containing electrostatic charges, a second electret between the first electrode and the second electrode, the second electret including at least one dielectric layer containing electrostatic charges, and a conductive layer sandwiched between the first electret and the second electret, the conductive layer, the first electret and the second electret being capable of vibratory motion relative to the first electrode and the second electrode based on the audio signal.
摘要翻译：一种静电电声装置，包括被配置为接收音频信号的第一电极，被配置为接收音频信号的第二电极，第一电极和第二电极之间的第一驻极体，所述第一驻极体包括至少一个包含静电电荷的电介质层，在所述第一电极和所述第二电极之间的第二驻极体，所述第二驻极体包括至少一个包含静电电荷的电介质层，以及夹在所述第一驻极体和所述第二驻极体之间的导电层，所述导电层，所述第一驻极体和所述第二驻极体能够基于音频信号相对于第一电极和第二电极进行振动运动。

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