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1. 发明授权

US06884377B1 Method and apparatus for microcellular polymer extrusion 有权
公开(公告)号：US06884377B1
公开(公告)日：2005-04-26
申请号：US09626808
申请日：2000-07-27
申请人： Theodore A. Burnham , Sung W. Cha , Robert H. Walat , Roland Y. Kim , Jere R. Anderson , James F. Stevenson , Nam P. Suh , Matthew Pallaver
发明人： Theodore A. Burnham , Sung W. Cha , Robert H. Walat , Roland Y. Kim , Jere R. Anderson , James F. Stevenson , Nam P. Suh , Matthew Pallaver
IPC分类号： B29C44/32 , B29C44/34 , B29C44/46 , B29C47/10 , B29C44/20
CPC分类号： B29C44/3446 , B29C44/322 , B29C44/3473 , B29C44/348 , B29C44/461 , B29C44/468 , B29C47/0004 , B29C47/0021 , B29C47/1063 , B29K2105/0005
摘要： Continuous polymeric extrusion nucleation systems and methods useful for making polymeric microcellular foamed materials, including crystalline and semi-crystalline polymeric microcellular materials, are provided. Pressure drop rate is an important feature in some embodiments, and the invention provides systems for controlling these and other parameters. One aspect involves a multiple-pathway nucleator that is separated from a shaping die by a residence chamber. Another aspect involves a die for making advantageously thick articles, including a multiple-pathway nucleation section. Microcellular material can be continuously extruded onto wire, resulting in a very thin, essentially closed-cell microcellular insulating coating secured to a wire. Other very thin microcellular products can be fabricated as well.

2. 发明授权

US06284810B1 Method and apparatus for microcellular polymer extrusion 有权
标题翻译：用于微孔聚合物挤出的方法和装置
公开(公告)号：US06284810B1
公开(公告)日：2001-09-04
申请号：US09258625
申请日：1999-02-26
申请人： Theodore A. Burnham , Sung W. Cha , Robert H. Walat , Roland Y. Kim , Jere R. Anderson , James F. Stevenson , Nam P. Suh , Matthew Pallaver
发明人： Theodore A. Burnham , Sung W. Cha , Robert H. Walat , Roland Y. Kim , Jere R. Anderson , James F. Stevenson , Nam P. Suh , Matthew Pallaver
IPC分类号： B29D700
CPC分类号： B29C44/322 , B29C44/3446 , B29C44/3473 , B29C44/348 , B29C44/461 , B29C44/468 , B29C47/0016 , B29C47/0019 , B29C47/1045 , B29C47/1063 , B29K2105/0005 , B29K2105/16
摘要： Continuous polymeric extrusion nucleation systems and methods useful for making polymeric microcellular foamed materials, including crystalline and semi-crystalline polymeric microcellular materials, are provided. Pressure drop rate is an important feature in some embodiments, and the invention provides systems for controlling these and other parameters. One aspect involves a multiple-pathway nucleator that is separated from a shaping die by a residence chamber. Another aspect involves a die for making advantageously thick articles, including a multiple-pathway nucleation section. Microcellular material can be continuously extruded onto wire, resulting in a very thin, essentially closed-cell microcellular insulating coating secured to a wire. Other very thin microcellular products can be fabricated as well.
摘要翻译：提供了连续的聚合物挤出成核体系和用于制备聚合物微孔泡沫材料（包括结晶和半结晶聚合物微孔材料）的方法。压降率在一些实施例中是重要的特征，本发明提供了用于控制这些和其它参数的系统。一个方面涉及多通路成核剂，其通过驻留室与成形模分离。另一方面涉及用于制造有利的厚制品的模具，包括多通道成核部分。微孔材料可以连续地挤出到线上，从而形成非常薄的，基本上闭合的细胞微孔绝缘涂层，固定到导线上。也可以制造其他非常薄的微细胞产品。

3. 发明授权

US06926507B2 Blowing agent delivery system 有权
标题翻译：发泡剂输送系统
公开(公告)号：US06926507B2
公开(公告)日：2005-08-09
申请号：US09782673
申请日：2001-02-13
申请人： Juan C. Cardona , Kevin J. Levesque , Theodore A. Burnham , Alan F. Matthieu , Roland Y. Kim
发明人： Juan C. Cardona , Kevin J. Levesque , Theodore A. Burnham , Alan F. Matthieu , Roland Y. Kim
IPC分类号： B29C45/18 , B29C44/34 , B29C45/00 , B29C45/50 , B29K105/04 , B29C44/60
CPC分类号： B29C44/3446
摘要： The invention provides a blowing agent delivery system for introducing a blowing agent into a polymeric foam processing system. The delivery system is designed to discontinuously introduce blowing agent from a continuous source into polymeric material within an extruder. The system, thus, may improve control over blowing agent delivery in discontinuous polymer processing systems such as injection molding or blow molding. In some embodiments, the blowing agent delivery system selectively directs blowing agent flow from the source to the extruder barrel, or through a bypassing passageway. In this manner, blowing agent may be continuously supplied by the source but discontinuously injected into the extruder barrel. During use, the delivery system may cause blowing agent to flow through the bypassing passageway, for example, when the screw stops plasticating polymeric material.
摘要翻译：本发明提供一种用于将发泡剂引入聚合物泡沫处理系统中的发泡剂输送系统。输送系统被设计成将来自连续源的发泡剂不连续地引入挤出机内的聚合材料中。因此，该系统可以改进对不连续聚合物处理系统中的发泡剂输送的控制，例如注塑或吹塑。在一些实施方案中，发泡剂输送系统选择性地将发泡剂流从源到挤出机筒，或通过旁路通道。以这种方式，发泡剂可以通过源连续供应，但是不连续地注入挤出机筒中。在使用期间，输送系统可能会使发泡剂流过旁通通道，例如当螺杆停止塑化聚合材料时。

4. 发明授权

US06659757B2 Valve for injection molding 有权
公开(公告)号：US06659757B2
公开(公告)日：2003-12-09
申请号：US10401480
申请日：2003-03-28
申请人： Roland Y. Kim , Theodore A. Burnham
发明人： Roland Y. Kim , Theodore A. Burnham
IPC分类号： B29C4700
CPC分类号： F16K31/1221 , B29C44/3446 , F16K1/38
摘要： A valve for controlling the flow of a high pressure fluid is provided. The valve provides a reliable way of controlling the flow of high pressure fluids in applications requiring multiple cycles where equipment may be exposed to environmentally harsh conditions, such as high temperatures and pressures.

5. 发明授权

US06616434B1 Blowing agent metering system 有权
标题翻译：吹气剂计量系统
公开(公告)号：US06616434B1
公开(公告)日：2003-09-09
申请号：US09636349
申请日：2000-08-10
申请人： Theodore A. Burnham , Jeffrey L. Ng
发明人： Theodore A. Burnham , Jeffrey L. Ng
IPC分类号： B29C4438
CPC分类号： B29C44/3446 , B29C44/60 , B29C47/92 , B29C2947/92019 , B29C2947/92209 , B29C2947/92333 , B29C2947/92419 , B29C2947/92514 , B29C2947/926 , B29C2947/92704 , B29C2947/92828 , B29C2947/92866 , B29C2947/92914
摘要： The invention provides a blowing agent metering system and method for use in polymeric foam processing. The system may be used to control the rate of introduction of blowing agent into polymeric material in a processing apparatus to form a mixture having the desired blowing agent weight percentage. The metering system includes a restriction orifice which is positioned in a pathway between a blowing agent source and a blowing agent port within a foam processing apparatus. The metering system measures the pressure differential as blowing agent flows across the restriction orifice from the source to the port and may also measure the temperature of the blowing agent at one or more locations. Using a pre-determined relationship between the flow rate, the orifice dimensions (e.g., length, diameter) and the measured variables (e.g., pressure differential, temperature), a controller of the system adjusts the pressure upstream of the restriction orifice in response to inputs of the measured variables to maintain a pressure differential across the orifice that provides the desired blowing agent flow rate.
摘要翻译：本发明提供一种用于聚合物泡沫处理的发泡剂计量系统和方法。该系统可用于控制在加工设备中将发泡剂引入聚合材料中的速率，以形成具有所需发泡剂重量百分比的混合物。计量系统包括限制孔口，该限制孔口位于泡沫处理装置内的发泡剂源和发泡剂口之间的通路中。计量系统测量发泡剂从限流孔流过端口的压差，也可测量一个或多个位置上发泡剂的温度。使用流量，孔口尺寸（例如长度，直径）和测量变量（例如，压差，温度）之间的预定关系，系统的控制器响应于测量的变量的输入以维持提供所需发泡剂流速的孔口两端的压差。

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