BUFFER TANK FOR POLYMER MELTS,IN PARTICULAR CELLULOSE SOLUTIONS

摘要

The invention relates to a buffer store, such as essentially used for guaranteeing constant supply of a polymer melt to a spinning machine. The buffer store is provided with a compensation chamber (5). The volume of said chamber can be changed according to a pressure prevailing in the polymer mel t and a fluctuation of the volume flow. The polymer melt flows from a polymer melt inlet through said compensation chamber and to a polymer melt outlet. T he aim of the invention is to homogenise the flow through the compensation chamber and to thus prevent that the sojourn time of the polymer melt in the compensation chamber is provided with a large dispersion and thereby results in threads having an irregular quality caused by the time-dependent mechanic al and chemical characteristics of the polymer melt, whereby said threads are produced by the spinning machine. To this end, the compensation chamber is provided with at least one flow guiding element (14, 15) that extends into t he flow of the polymer melt and serves for optimising the flow. Said element is smaller than the flow cross-section of the compensation chamber. The speed profile is at least partially homogenised in the flow direction through the compensation chamber by means of said element.