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1. 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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